1 /* Asynchronous subprocess control for GNU Emacs.
3 Copyright (C) 1985-1988, 1993-1996, 1998-1999, 2001-2016 Free Software
6 This file is part of GNU Emacs.
8 GNU Emacs is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or (at
11 your option) any later version.
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
26 #include <sys/types.h> /* Some typedefs are used in sys/file.h. */
34 /* Only MS-DOS does not define `subprocesses'. */
37 #include <sys/socket.h>
39 #include <netinet/in.h>
40 #include <arpa/inet.h>
42 /* Are local (unix) sockets supported? */
43 #if defined (HAVE_SYS_UN_H)
44 #if !defined (AF_LOCAL) && defined (AF_UNIX)
45 #define AF_LOCAL AF_UNIX
48 #define HAVE_LOCAL_SOCKETS
53 #include <sys/ioctl.h>
54 #if defined (HAVE_NET_IF_H)
56 #endif /* HAVE_NET_IF_H */
58 #if defined (HAVE_IFADDRS_H)
59 /* Must be after net/if.h */
62 /* We only use structs from this header when we use getifaddrs. */
63 #if defined (HAVE_NET_IF_DL_H)
64 #include <net/if_dl.h>
74 # include <sys/stream.h>
75 # include <sys/stropts.h>
90 #endif /* subprocesses */
96 #include "character.h"
101 #include "termopts.h"
102 #include "keyboard.h"
103 #include "blockinput.h"
105 #include "sysselect.h"
106 #include "syssignal.h"
112 #ifdef HAVE_WINDOW_SYSTEM
114 #endif /* HAVE_WINDOW_SYSTEM */
117 #include "xgselect.h"
123 #if defined HAVE_GETADDRINFO_A || defined HAVE_GNUTLS
124 /* This is 0.1s in nanoseconds. */
125 #define ASYNC_RETRY_NSEC 100000000
129 extern int sys_select (int, fd_set
*, fd_set
*, fd_set
*,
130 struct timespec
*, void *);
133 /* Work around GCC 4.3.0 bug with strict overflow checking; see
134 <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52904>.
135 This bug appears to be fixed in GCC 5.1, so don't work around it there. */
136 #if GNUC_PREREQ (4, 3, 0) && ! GNUC_PREREQ (5, 1, 0)
137 # pragma GCC diagnostic ignored "-Wstrict-overflow"
140 /* True if keyboard input is on hold, zero otherwise. */
142 static bool kbd_is_on_hold
;
144 /* Nonzero means don't run process sentinels. This is used
146 bool inhibit_sentinels
;
151 # define SOCK_CLOEXEC 0
153 #ifndef SOCK_NONBLOCK
154 # define SOCK_NONBLOCK 0
157 /* True if ERRNUM represents an error where the system call would
158 block if a blocking variant were used. */
160 would_block (int errnum
)
163 if (EWOULDBLOCK
!= EAGAIN
&& errnum
== EWOULDBLOCK
)
166 return errnum
== EAGAIN
;
171 /* Emulate GNU/Linux accept4 and socket well enough for this module. */
174 close_on_exec (int fd
)
177 fcntl (fd
, F_SETFD
, FD_CLOEXEC
);
182 # define accept4(sockfd, addr, addrlen, flags) \
183 process_accept4 (sockfd, addr, addrlen, flags)
185 accept4 (int sockfd
, struct sockaddr
*addr
, socklen_t
*addrlen
, int flags
)
187 return close_on_exec (accept (sockfd
, addr
, addrlen
));
191 process_socket (int domain
, int type
, int protocol
)
193 return close_on_exec (socket (domain
, type
, protocol
));
196 # define socket(domain, type, protocol) process_socket (domain, type, protocol)
199 #define NETCONN_P(p) (EQ (XPROCESS (p)->type, Qnetwork))
200 #define NETCONN1_P(p) (EQ (p->type, Qnetwork))
201 #define SERIALCONN_P(p) (EQ (XPROCESS (p)->type, Qserial))
202 #define SERIALCONN1_P(p) (EQ (p->type, Qserial))
203 #define PIPECONN_P(p) (EQ (XPROCESS (p)->type, Qpipe))
204 #define PIPECONN1_P(p) (EQ (p->type, Qpipe))
206 /* Number of events of change of status of a process. */
207 static EMACS_INT process_tick
;
208 /* Number of events for which the user or sentinel has been notified. */
209 static EMACS_INT update_tick
;
211 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
212 this system. We need to read full packets, so we need a
213 "non-destructive" select. So we require either native select,
214 or emulation of select using FIONREAD. */
216 #ifndef BROKEN_DATAGRAM_SOCKETS
217 # if defined HAVE_SELECT || defined USABLE_FIONREAD
218 # if defined HAVE_SENDTO && defined HAVE_RECVFROM && defined EMSGSIZE
219 # define DATAGRAM_SOCKETS
224 #if defined HAVE_LOCAL_SOCKETS && defined DATAGRAM_SOCKETS
225 # define HAVE_SEQPACKET
228 #define READ_OUTPUT_DELAY_INCREMENT (TIMESPEC_RESOLUTION / 100)
229 #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5)
230 #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7)
232 /* Number of processes which have a non-zero read_output_delay,
233 and therefore might be delayed for adaptive read buffering. */
235 static int process_output_delay_count
;
237 /* True if any process has non-nil read_output_skip. */
239 static bool process_output_skip
;
241 static void create_process (Lisp_Object
, char **, Lisp_Object
);
243 static bool keyboard_bit_set (fd_set
*);
245 static void deactivate_process (Lisp_Object
);
246 static int status_notify (struct Lisp_Process
*, struct Lisp_Process
*);
247 static int read_process_output (Lisp_Object
, int);
248 static void handle_child_signal (int);
249 static void create_pty (Lisp_Object
);
251 static Lisp_Object
get_process (register Lisp_Object name
);
252 static void exec_sentinel (Lisp_Object proc
, Lisp_Object reason
);
254 /* Mask of bits indicating the descriptors that we wait for input on. */
256 static fd_set input_wait_mask
;
258 /* Mask that excludes keyboard input descriptor(s). */
260 static fd_set non_keyboard_wait_mask
;
262 /* Mask that excludes process input descriptor(s). */
264 static fd_set non_process_wait_mask
;
266 /* Mask for selecting for write. */
268 static fd_set write_mask
;
270 /* Mask of bits indicating the descriptors that we wait for connect to
271 complete on. Once they complete, they are removed from this mask
272 and added to the input_wait_mask and non_keyboard_wait_mask. */
274 static fd_set connect_wait_mask
;
276 /* Number of bits set in connect_wait_mask. */
277 static int num_pending_connects
;
279 /* The largest descriptor currently in use for a process object; -1 if none. */
280 static int max_process_desc
;
282 /* The largest descriptor currently in use for input; -1 if none. */
283 static int max_input_desc
;
285 /* Set the external socket descriptor for Emacs to use when
286 `make-network-process' is called with a non-nil
287 `:use-external-socket' option. The value should be either -1, or
288 the file descriptor of a socket that is already bound. */
289 static int external_sock_fd
;
291 /* Indexed by descriptor, gives the process (if any) for that descriptor. */
292 static Lisp_Object chan_process
[FD_SETSIZE
];
293 static void wait_for_socket_fds (Lisp_Object
, char const *);
295 /* Alist of elements (NAME . PROCESS). */
296 static Lisp_Object Vprocess_alist
;
298 /* Buffered-ahead input char from process, indexed by channel.
299 -1 means empty (no char is buffered).
300 Used on sys V where the only way to tell if there is any
301 output from the process is to read at least one char.
302 Always -1 on systems that support FIONREAD. */
304 static int proc_buffered_char
[FD_SETSIZE
];
306 /* Table of `struct coding-system' for each process. */
307 static struct coding_system
*proc_decode_coding_system
[FD_SETSIZE
];
308 static struct coding_system
*proc_encode_coding_system
[FD_SETSIZE
];
310 #ifdef DATAGRAM_SOCKETS
311 /* Table of `partner address' for datagram sockets. */
312 static struct sockaddr_and_len
{
315 } datagram_address
[FD_SETSIZE
];
316 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
317 #define DATAGRAM_CONN_P(proc) \
318 (PROCESSP (proc) && \
319 XPROCESS (proc)->infd >= 0 && \
320 datagram_address[XPROCESS (proc)->infd].sa != 0)
322 #define DATAGRAM_CONN_P(proc) (0)
325 /* FOR_EACH_PROCESS (LIST_VAR, PROC_VAR) followed by a statement is
326 a `for' loop which iterates over processes from Vprocess_alist. */
328 #define FOR_EACH_PROCESS(list_var, proc_var) \
329 FOR_EACH_ALIST_VALUE (Vprocess_alist, list_var, proc_var)
331 /* These setters are used only in this file, so they can be private. */
333 pset_buffer (struct Lisp_Process
*p
, Lisp_Object val
)
338 pset_command (struct Lisp_Process
*p
, Lisp_Object val
)
343 pset_decode_coding_system (struct Lisp_Process
*p
, Lisp_Object val
)
345 p
->decode_coding_system
= val
;
348 pset_decoding_buf (struct Lisp_Process
*p
, Lisp_Object val
)
350 p
->decoding_buf
= val
;
353 pset_encode_coding_system (struct Lisp_Process
*p
, Lisp_Object val
)
355 p
->encode_coding_system
= val
;
358 pset_encoding_buf (struct Lisp_Process
*p
, Lisp_Object val
)
360 p
->encoding_buf
= val
;
363 pset_filter (struct Lisp_Process
*p
, Lisp_Object val
)
365 p
->filter
= NILP (val
) ? Qinternal_default_process_filter
: val
;
368 pset_log (struct Lisp_Process
*p
, Lisp_Object val
)
373 pset_mark (struct Lisp_Process
*p
, Lisp_Object val
)
378 pset_name (struct Lisp_Process
*p
, Lisp_Object val
)
383 pset_plist (struct Lisp_Process
*p
, Lisp_Object val
)
388 pset_sentinel (struct Lisp_Process
*p
, Lisp_Object val
)
390 p
->sentinel
= NILP (val
) ? Qinternal_default_process_sentinel
: val
;
393 pset_tty_name (struct Lisp_Process
*p
, Lisp_Object val
)
398 pset_type (struct Lisp_Process
*p
, Lisp_Object val
)
403 pset_write_queue (struct Lisp_Process
*p
, Lisp_Object val
)
405 p
->write_queue
= val
;
408 pset_stderrproc (struct Lisp_Process
*p
, Lisp_Object val
)
415 make_lisp_proc (struct Lisp_Process
*p
)
417 return make_lisp_ptr (p
, Lisp_Vectorlike
);
420 static struct fd_callback_data
426 int condition
; /* Mask of the defines above. */
427 } fd_callback_info
[FD_SETSIZE
];
430 /* Add a file descriptor FD to be monitored for when read is possible.
431 When read is possible, call FUNC with argument DATA. */
434 add_read_fd (int fd
, fd_callback func
, void *data
)
436 add_keyboard_wait_descriptor (fd
);
438 fd_callback_info
[fd
].func
= func
;
439 fd_callback_info
[fd
].data
= data
;
440 fd_callback_info
[fd
].condition
|= FOR_READ
;
443 /* Stop monitoring file descriptor FD for when read is possible. */
446 delete_read_fd (int fd
)
448 delete_keyboard_wait_descriptor (fd
);
450 fd_callback_info
[fd
].condition
&= ~FOR_READ
;
451 if (fd_callback_info
[fd
].condition
== 0)
453 fd_callback_info
[fd
].func
= 0;
454 fd_callback_info
[fd
].data
= 0;
458 /* Add a file descriptor FD to be monitored for when write is possible.
459 When write is possible, call FUNC with argument DATA. */
462 add_write_fd (int fd
, fd_callback func
, void *data
)
464 FD_SET (fd
, &write_mask
);
465 if (fd
> max_input_desc
)
468 fd_callback_info
[fd
].func
= func
;
469 fd_callback_info
[fd
].data
= data
;
470 fd_callback_info
[fd
].condition
|= FOR_WRITE
;
473 /* FD is no longer an input descriptor; update max_input_desc accordingly. */
476 delete_input_desc (int fd
)
478 if (fd
== max_input_desc
)
482 while (0 <= fd
&& ! (FD_ISSET (fd
, &input_wait_mask
)
483 || FD_ISSET (fd
, &write_mask
)));
489 /* Stop monitoring file descriptor FD for when write is possible. */
492 delete_write_fd (int fd
)
494 FD_CLR (fd
, &write_mask
);
495 fd_callback_info
[fd
].condition
&= ~FOR_WRITE
;
496 if (fd_callback_info
[fd
].condition
== 0)
498 fd_callback_info
[fd
].func
= 0;
499 fd_callback_info
[fd
].data
= 0;
500 delete_input_desc (fd
);
505 /* Compute the Lisp form of the process status, p->status, from
506 the numeric status that was returned by `wait'. */
508 static Lisp_Object
status_convert (int);
511 update_status (struct Lisp_Process
*p
)
513 eassert (p
->raw_status_new
);
514 pset_status (p
, status_convert (p
->raw_status
));
515 p
->raw_status_new
= 0;
518 /* Convert a process status word in Unix format to
519 the list that we use internally. */
522 status_convert (int w
)
525 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
526 else if (WIFEXITED (w
))
527 return Fcons (Qexit
, Fcons (make_number (WEXITSTATUS (w
)),
528 WCOREDUMP (w
) ? Qt
: Qnil
));
529 else if (WIFSIGNALED (w
))
530 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
531 WCOREDUMP (w
) ? Qt
: Qnil
));
536 /* True if STATUS is that of a process attempting connection. */
539 connecting_status (Lisp_Object status
)
541 return CONSP (status
) && EQ (XCAR (status
), Qconnect
);
544 /* Given a status-list, extract the three pieces of information
545 and store them individually through the three pointers. */
548 decode_status (Lisp_Object l
, Lisp_Object
*symbol
, Lisp_Object
*code
,
553 if (connecting_status (l
))
559 *code
= make_number (0);
568 *coredump
= !NILP (tem
);
572 /* Return a string describing a process status list. */
575 status_message (struct Lisp_Process
*p
)
577 Lisp_Object status
= p
->status
;
578 Lisp_Object symbol
, code
;
582 decode_status (status
, &symbol
, &code
, &coredump
);
584 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
587 synchronize_system_messages_locale ();
588 signame
= strsignal (XFASTINT (code
));
590 string
= build_string ("unknown");
595 string
= build_unibyte_string (signame
);
596 if (! NILP (Vlocale_coding_system
))
597 string
= (code_convert_string_norecord
598 (string
, Vlocale_coding_system
, 0));
599 c1
= STRING_CHAR (SDATA (string
));
602 Faset (string
, make_number (0), make_number (c2
));
604 AUTO_STRING (suffix
, coredump
? " (core dumped)\n" : "\n");
605 return concat2 (string
, suffix
);
607 else if (EQ (symbol
, Qexit
))
610 return build_string (XFASTINT (code
) == 0
612 : "connection broken by remote peer\n");
613 if (XFASTINT (code
) == 0)
614 return build_string ("finished\n");
615 AUTO_STRING (prefix
, "exited abnormally with code ");
616 string
= Fnumber_to_string (code
);
617 AUTO_STRING (suffix
, coredump
? " (core dumped)\n" : "\n");
618 return concat3 (prefix
, string
, suffix
);
620 else if (EQ (symbol
, Qfailed
))
622 AUTO_STRING (format
, "failed with code %s\n");
623 return CALLN (Fformat
, format
, code
);
626 return Fcopy_sequence (Fsymbol_name (symbol
));
629 enum { PTY_NAME_SIZE
= 24 };
631 /* Open an available pty, returning a file descriptor.
632 Store into PTY_NAME the file name of the terminal corresponding to the pty.
633 Return -1 on failure. */
636 allocate_pty (char pty_name
[PTY_NAME_SIZE
])
645 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
646 for (i
= 0; i
< 16; i
++)
649 #ifdef PTY_NAME_SPRINTF
652 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
653 #endif /* no PTY_NAME_SPRINTF */
657 #else /* no PTY_OPEN */
658 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
659 #endif /* no PTY_OPEN */
663 #ifdef PTY_TTY_NAME_SPRINTF
666 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
667 #endif /* no PTY_TTY_NAME_SPRINTF */
669 /* Set FD's close-on-exec flag. This is needed even if
670 PT_OPEN calls posix_openpt with O_CLOEXEC, since POSIX
671 doesn't require support for that combination.
672 Do this after PTY_TTY_NAME_SPRINTF, which on some platforms
673 doesn't work if the close-on-exec flag is set (Bug#20555).
674 Multithreaded platforms where posix_openpt ignores
675 O_CLOEXEC (or where PTY_OPEN doesn't call posix_openpt)
676 have a race condition between the PTY_OPEN and here. */
677 fcntl (fd
, F_SETFD
, FD_CLOEXEC
);
679 /* Check to make certain that both sides are available.
680 This avoids a nasty yet stupid bug in rlogins. */
681 if (faccessat (AT_FDCWD
, pty_name
, R_OK
| W_OK
, AT_EACCESS
) != 0)
694 #endif /* HAVE_PTYS */
698 /* Allocate basically initialized process. */
700 static struct Lisp_Process
*
701 allocate_process (void)
703 return ALLOCATE_ZEROED_PSEUDOVECTOR (struct Lisp_Process
, pid
, PVEC_PROCESS
);
707 make_process (Lisp_Object name
)
709 struct Lisp_Process
*p
= allocate_process ();
710 /* Initialize Lisp data. Note that allocate_process initializes all
711 Lisp data to nil, so do it only for slots which should not be nil. */
712 pset_status (p
, Qrun
);
713 pset_mark (p
, Fmake_marker ());
715 /* Initialize non-Lisp data. Note that allocate_process zeroes out all
716 non-Lisp data, so do it only for slots which should not be zero. */
719 for (int i
= 0; i
< PROCESS_OPEN_FDS
; i
++)
723 p
->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
724 p
->gnutls_boot_parameters
= Qnil
;
727 /* If name is already in use, modify it until it is unused. */
729 Lisp_Object name1
= name
;
730 for (printmax_t i
= 1; ; i
++)
732 Lisp_Object tem
= Fget_process (name1
);
735 char const suffix_fmt
[] = "<%"pMd
">";
736 char suffix
[sizeof suffix_fmt
+ INT_STRLEN_BOUND (printmax_t
)];
737 AUTO_STRING_WITH_LEN (lsuffix
, suffix
, sprintf (suffix
, suffix_fmt
, i
));
738 name1
= concat2 (name
, lsuffix
);
742 pset_sentinel (p
, Qinternal_default_process_sentinel
);
743 pset_filter (p
, Qinternal_default_process_filter
);
745 XSETPROCESS (val
, p
);
746 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
751 remove_process (register Lisp_Object proc
)
753 register Lisp_Object pair
;
755 pair
= Frassq (proc
, Vprocess_alist
);
756 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
758 deactivate_process (proc
);
761 #ifdef HAVE_GETADDRINFO_A
763 free_dns_request (Lisp_Object proc
)
765 struct Lisp_Process
*p
= XPROCESS (proc
);
767 if (p
->dns_request
->ar_result
)
768 freeaddrinfo (p
->dns_request
->ar_result
);
769 xfree (p
->dns_request
);
770 p
->dns_request
= NULL
;
775 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
776 doc
: /* Return t if OBJECT is a process. */)
779 return PROCESSP (object
) ? Qt
: Qnil
;
782 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
783 doc
: /* Return the process named NAME, or nil if there is none. */)
784 (register Lisp_Object name
)
789 return Fcdr (Fassoc (name
, Vprocess_alist
));
792 /* This is how commands for the user decode process arguments. It
793 accepts a process, a process name, a buffer, a buffer name, or nil.
794 Buffers denote the first process in the buffer, and nil denotes the
798 get_process (register Lisp_Object name
)
800 register Lisp_Object proc
, obj
;
803 obj
= Fget_process (name
);
805 obj
= Fget_buffer (name
);
807 error ("Process %s does not exist", SDATA (name
));
809 else if (NILP (name
))
810 obj
= Fcurrent_buffer ();
814 /* Now obj should be either a buffer object or a process object. */
817 if (NILP (BVAR (XBUFFER (obj
), name
)))
818 error ("Attempt to get process for a dead buffer");
819 proc
= Fget_buffer_process (obj
);
821 error ("Buffer %s has no process", SDATA (BVAR (XBUFFER (obj
), name
)));
832 /* Fdelete_process promises to immediately forget about the process, but in
833 reality, Emacs needs to remember those processes until they have been
834 treated by the SIGCHLD handler and waitpid has been invoked on them;
835 otherwise they might fill up the kernel's process table.
837 Some processes created by call-process are also put onto this list.
839 Members of this list are (process-ID . filename) pairs. The
840 process-ID is a number; the filename, if a string, is a file that
841 needs to be removed after the process exits. */
842 static Lisp_Object deleted_pid_list
;
845 record_deleted_pid (pid_t pid
, Lisp_Object filename
)
847 deleted_pid_list
= Fcons (Fcons (make_fixnum_or_float (pid
), filename
),
848 /* GC treated elements set to nil. */
849 Fdelq (Qnil
, deleted_pid_list
));
853 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
854 doc
: /* Delete PROCESS: kill it and forget about it immediately.
855 PROCESS may be a process, a buffer, the name of a process or buffer, or
856 nil, indicating the current buffer's process. */)
857 (register Lisp_Object process
)
859 register struct Lisp_Process
*p
;
861 process
= get_process (process
);
862 p
= XPROCESS (process
);
864 #ifdef HAVE_GETADDRINFO_A
867 /* Cancel the request. Unless shutting down, wait until
868 completion. Free the request if completely canceled. */
870 bool canceled
= gai_cancel (p
->dns_request
) != EAI_NOTCANCELED
;
871 if (!canceled
&& !inhibit_sentinels
)
873 struct gaicb
const *req
= p
->dns_request
;
874 while (gai_suspend (&req
, 1, NULL
) != 0)
879 free_dns_request (process
);
883 p
->raw_status_new
= 0;
884 if (NETCONN1_P (p
) || SERIALCONN1_P (p
) || PIPECONN1_P (p
))
886 pset_status (p
, list2 (Qexit
, make_number (0)));
887 p
->tick
= ++process_tick
;
888 status_notify (p
, NULL
);
889 redisplay_preserve_echo_area (13);
894 record_kill_process (p
, Qnil
);
898 /* Update P's status, since record_kill_process will make the
899 SIGCHLD handler update deleted_pid_list, not *P. */
901 if (p
->raw_status_new
)
903 symbol
= CONSP (p
->status
) ? XCAR (p
->status
) : p
->status
;
904 if (! (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)))
905 pset_status (p
, list2 (Qsignal
, make_number (SIGKILL
)));
907 p
->tick
= ++process_tick
;
908 status_notify (p
, NULL
);
909 redisplay_preserve_echo_area (13);
912 remove_process (process
);
916 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
917 doc
: /* Return the status of PROCESS.
918 The returned value is one of the following symbols:
919 run -- for a process that is running.
920 stop -- for a process stopped but continuable.
921 exit -- for a process that has exited.
922 signal -- for a process that has got a fatal signal.
923 open -- for a network stream connection that is open.
924 listen -- for a network stream server that is listening.
925 closed -- for a network stream connection that is closed.
926 connect -- when waiting for a non-blocking connection to complete.
927 failed -- when a non-blocking connection has failed.
928 nil -- if arg is a process name and no such process exists.
929 PROCESS may be a process, a buffer, the name of a process, or
930 nil, indicating the current buffer's process. */)
931 (register Lisp_Object process
)
933 register struct Lisp_Process
*p
;
934 register Lisp_Object status
;
936 if (STRINGP (process
))
937 process
= Fget_process (process
);
939 process
= get_process (process
);
944 p
= XPROCESS (process
);
945 if (p
->raw_status_new
)
949 status
= XCAR (status
);
950 if (NETCONN1_P (p
) || SERIALCONN1_P (p
) || PIPECONN1_P (p
))
952 if (EQ (status
, Qexit
))
954 else if (EQ (p
->command
, Qt
))
956 else if (EQ (status
, Qrun
))
962 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
964 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
965 If PROCESS has not yet exited or died, return 0. */)
966 (register Lisp_Object process
)
968 CHECK_PROCESS (process
);
969 if (XPROCESS (process
)->raw_status_new
)
970 update_status (XPROCESS (process
));
971 if (CONSP (XPROCESS (process
)->status
))
972 return XCAR (XCDR (XPROCESS (process
)->status
));
973 return make_number (0);
976 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
977 doc
: /* Return the process id of PROCESS.
978 This is the pid of the external process which PROCESS uses or talks to.
979 For a network connection, this value is nil. */)
980 (register Lisp_Object process
)
984 CHECK_PROCESS (process
);
985 pid
= XPROCESS (process
)->pid
;
986 return (pid
? make_fixnum_or_float (pid
) : Qnil
);
989 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
990 doc
: /* Return the name of PROCESS, as a string.
991 This is the name of the program invoked in PROCESS,
992 possibly modified to make it unique among process names. */)
993 (register Lisp_Object process
)
995 CHECK_PROCESS (process
);
996 return XPROCESS (process
)->name
;
999 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
1000 doc
: /* Return the command that was executed to start PROCESS.
1001 This is a list of strings, the first string being the program executed
1002 and the rest of the strings being the arguments given to it.
1003 For a network or serial process, this is nil (process is running) or t
1004 \(process is stopped). */)
1005 (register Lisp_Object process
)
1007 CHECK_PROCESS (process
);
1008 return XPROCESS (process
)->command
;
1011 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
1012 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
1013 This is the terminal that the process itself reads and writes on,
1014 not the name of the pty that Emacs uses to talk with that terminal. */)
1015 (register Lisp_Object process
)
1017 CHECK_PROCESS (process
);
1018 return XPROCESS (process
)->tty_name
;
1021 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
1023 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil).
1025 (register Lisp_Object process
, Lisp_Object buffer
)
1027 struct Lisp_Process
*p
;
1029 CHECK_PROCESS (process
);
1031 CHECK_BUFFER (buffer
);
1032 p
= XPROCESS (process
);
1033 pset_buffer (p
, buffer
);
1034 if (NETCONN1_P (p
) || SERIALCONN1_P (p
) || PIPECONN1_P (p
))
1035 pset_childp (p
, Fplist_put (p
->childp
, QCbuffer
, buffer
));
1036 setup_process_coding_systems (process
);
1040 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
1042 doc
: /* Return the buffer PROCESS is associated with.
1043 The default process filter inserts output from PROCESS into this buffer. */)
1044 (register Lisp_Object process
)
1046 CHECK_PROCESS (process
);
1047 return XPROCESS (process
)->buffer
;
1050 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
1052 doc
: /* Return the marker for the end of the last output from PROCESS. */)
1053 (register Lisp_Object process
)
1055 CHECK_PROCESS (process
);
1056 return XPROCESS (process
)->mark
;
1060 set_process_filter_masks (struct Lisp_Process
*p
)
1062 if (EQ (p
->filter
, Qt
) && !EQ (p
->status
, Qlisten
))
1064 FD_CLR (p
->infd
, &input_wait_mask
);
1065 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
1067 else if (EQ (p
->filter
, Qt
)
1068 /* Network or serial process not stopped: */
1069 && !EQ (p
->command
, Qt
))
1071 FD_SET (p
->infd
, &input_wait_mask
);
1072 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
1076 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
1078 doc
: /* Give PROCESS the filter function FILTER; nil means default.
1079 A value of t means stop accepting output from the process.
1081 When a process has a non-default filter, its buffer is not used for output.
1082 Instead, each time it does output, the entire string of output is
1083 passed to the filter.
1085 The filter gets two arguments: the process and the string of output.
1086 The string argument is normally a multibyte string, except:
1087 - if the process's input coding system is no-conversion or raw-text,
1088 it is a unibyte string (the non-converted input), or else
1089 - if `default-enable-multibyte-characters' is nil, it is a unibyte
1090 string (the result of converting the decoded input multibyte
1091 string to unibyte with `string-make-unibyte'). */)
1092 (Lisp_Object process
, Lisp_Object filter
)
1094 CHECK_PROCESS (process
);
1095 struct Lisp_Process
*p
= XPROCESS (process
);
1097 /* Don't signal an error if the process's input file descriptor
1098 is closed. This could make debugging Lisp more difficult,
1099 for example when doing something like
1101 (setq process (start-process ...))
1103 (set-process-filter process ...) */
1106 filter
= Qinternal_default_process_filter
;
1108 pset_filter (p
, filter
);
1111 set_process_filter_masks (p
);
1113 if (NETCONN1_P (p
) || SERIALCONN1_P (p
) || PIPECONN1_P (p
))
1114 pset_childp (p
, Fplist_put (p
->childp
, QCfilter
, filter
));
1115 setup_process_coding_systems (process
);
1119 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
1121 doc
: /* Return the filter function of PROCESS.
1122 See `set-process-filter' for more info on filter functions. */)
1123 (register Lisp_Object process
)
1125 CHECK_PROCESS (process
);
1126 return XPROCESS (process
)->filter
;
1129 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
1131 doc
: /* Give PROCESS the sentinel SENTINEL; nil for default.
1132 The sentinel is called as a function when the process changes state.
1133 It gets two arguments: the process, and a string describing the change. */)
1134 (register Lisp_Object process
, Lisp_Object sentinel
)
1136 struct Lisp_Process
*p
;
1138 CHECK_PROCESS (process
);
1139 p
= XPROCESS (process
);
1141 if (NILP (sentinel
))
1142 sentinel
= Qinternal_default_process_sentinel
;
1144 pset_sentinel (p
, sentinel
);
1145 if (NETCONN1_P (p
) || SERIALCONN1_P (p
) || PIPECONN1_P (p
))
1146 pset_childp (p
, Fplist_put (p
->childp
, QCsentinel
, sentinel
));
1150 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1152 doc
: /* Return the sentinel of PROCESS.
1153 See `set-process-sentinel' for more info on sentinels. */)
1154 (register Lisp_Object process
)
1156 CHECK_PROCESS (process
);
1157 return XPROCESS (process
)->sentinel
;
1160 DEFUN ("set-process-window-size", Fset_process_window_size
,
1161 Sset_process_window_size
, 3, 3, 0,
1162 doc
: /* Tell PROCESS that it has logical window size WIDTH by HEIGHT.
1163 Value is t if PROCESS was successfully told about the window size,
1165 (Lisp_Object process
, Lisp_Object height
, Lisp_Object width
)
1167 CHECK_PROCESS (process
);
1169 /* All known platforms store window sizes as 'unsigned short'. */
1170 CHECK_RANGED_INTEGER (height
, 0, USHRT_MAX
);
1171 CHECK_RANGED_INTEGER (width
, 0, USHRT_MAX
);
1173 if (NETCONN_P (process
)
1174 || XPROCESS (process
)->infd
< 0
1175 || (set_window_size (XPROCESS (process
)->infd
,
1176 XINT (height
), XINT (width
))
1183 DEFUN ("set-process-inherit-coding-system-flag",
1184 Fset_process_inherit_coding_system_flag
,
1185 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1186 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1187 If the second argument FLAG is non-nil, then the variable
1188 `buffer-file-coding-system' of the buffer associated with PROCESS
1189 will be bound to the value of the coding system used to decode
1192 This is useful when the coding system specified for the process buffer
1193 leaves either the character code conversion or the end-of-line conversion
1194 unspecified, or if the coding system used to decode the process output
1195 is more appropriate for saving the process buffer.
1197 Binding the variable `inherit-process-coding-system' to non-nil before
1198 starting the process is an alternative way of setting the inherit flag
1199 for the process which will run.
1201 This function returns FLAG. */)
1202 (register Lisp_Object process
, Lisp_Object flag
)
1204 CHECK_PROCESS (process
);
1205 XPROCESS (process
)->inherit_coding_system_flag
= !NILP (flag
);
1209 DEFUN ("set-process-query-on-exit-flag",
1210 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1212 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1213 If the second argument FLAG is non-nil, Emacs will query the user before
1214 exiting or killing a buffer if PROCESS is running. This function
1216 (register Lisp_Object process
, Lisp_Object flag
)
1218 CHECK_PROCESS (process
);
1219 XPROCESS (process
)->kill_without_query
= NILP (flag
);
1223 DEFUN ("process-query-on-exit-flag",
1224 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1226 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1227 (register Lisp_Object process
)
1229 CHECK_PROCESS (process
);
1230 return (XPROCESS (process
)->kill_without_query
? Qnil
: Qt
);
1233 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1235 doc
: /* Return the contact info of PROCESS; t for a real child.
1236 For a network or serial connection, the value depends on the optional
1237 KEY arg. If KEY is nil, value is a cons cell of the form (HOST
1238 SERVICE) for a network connection or (PORT SPEED) for a serial
1239 connection. If KEY is t, the complete contact information for the
1240 connection is returned, else the specific value for the keyword KEY is
1241 returned. See `make-network-process' or `make-serial-process' for a
1243 If PROCESS is a non-blocking network process that hasn't been fully
1244 set up yet, this function will block until socket setup has completed. */)
1245 (Lisp_Object process
, Lisp_Object key
)
1247 Lisp_Object contact
;
1249 CHECK_PROCESS (process
);
1250 contact
= XPROCESS (process
)->childp
;
1252 #ifdef DATAGRAM_SOCKETS
1254 if (NETCONN_P (process
))
1255 wait_for_socket_fds (process
, "process-contact");
1257 if (DATAGRAM_CONN_P (process
)
1258 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1259 contact
= Fplist_put (contact
, QCremote
,
1260 Fprocess_datagram_address (process
));
1263 if ((!NETCONN_P (process
) && !SERIALCONN_P (process
) && !PIPECONN_P (process
))
1266 if (NILP (key
) && NETCONN_P (process
))
1267 return list2 (Fplist_get (contact
, QChost
),
1268 Fplist_get (contact
, QCservice
));
1269 if (NILP (key
) && SERIALCONN_P (process
))
1270 return list2 (Fplist_get (contact
, QCport
),
1271 Fplist_get (contact
, QCspeed
));
1272 /* FIXME: Return a meaningful value (e.g., the child end of the pipe)
1273 if the pipe process is useful for purposes other than receiving
1275 if (NILP (key
) && PIPECONN_P (process
))
1277 return Fplist_get (contact
, key
);
1280 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1282 doc
: /* Return the plist of PROCESS. */)
1283 (register Lisp_Object process
)
1285 CHECK_PROCESS (process
);
1286 return XPROCESS (process
)->plist
;
1289 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1291 doc
: /* Replace the plist of PROCESS with PLIST. Return PLIST. */)
1292 (Lisp_Object process
, Lisp_Object plist
)
1294 CHECK_PROCESS (process
);
1297 pset_plist (XPROCESS (process
), plist
);
1301 #if 0 /* Turned off because we don't currently record this info
1302 in the process. Perhaps add it. */
1303 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1304 doc
: /* Return the connection type of PROCESS.
1305 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1306 a socket connection. */)
1307 (Lisp_Object process
)
1309 return XPROCESS (process
)->type
;
1313 DEFUN ("process-type", Fprocess_type
, Sprocess_type
, 1, 1, 0,
1314 doc
: /* Return the connection type of PROCESS.
1315 The value is either the symbol `real', `network', or `serial'.
1316 PROCESS may be a process, a buffer, the name of a process or buffer, or
1317 nil, indicating the current buffer's process. */)
1318 (Lisp_Object process
)
1321 proc
= get_process (process
);
1322 return XPROCESS (proc
)->type
;
1325 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1327 doc
: /* Convert network ADDRESS from internal format to a string.
1328 A 4 or 5 element vector represents an IPv4 address (with port number).
1329 An 8 or 9 element vector represents an IPv6 address (with port number).
1330 If optional second argument OMIT-PORT is non-nil, don't include a port
1331 number in the string, even when present in ADDRESS.
1332 Return nil if format of ADDRESS is invalid. */)
1333 (Lisp_Object address
, Lisp_Object omit_port
)
1338 if (STRINGP (address
)) /* AF_LOCAL */
1341 if (VECTORP (address
)) /* AF_INET or AF_INET6 */
1343 register struct Lisp_Vector
*p
= XVECTOR (address
);
1344 ptrdiff_t size
= p
->header
.size
;
1345 Lisp_Object args
[10];
1349 if (size
== 4 || (size
== 5 && !NILP (omit_port
)))
1351 format
= "%d.%d.%d.%d";
1356 format
= "%d.%d.%d.%d:%d";
1359 else if (size
== 8 || (size
== 9 && !NILP (omit_port
)))
1361 format
= "%x:%x:%x:%x:%x:%x:%x:%x";
1366 format
= "[%x:%x:%x:%x:%x:%x:%x:%x]:%d";
1372 AUTO_STRING (format_obj
, format
);
1373 args
[0] = format_obj
;
1375 for (i
= 0; i
< nargs
; i
++)
1377 if (! RANGED_INTEGERP (0, p
->contents
[i
], 65535))
1380 if (nargs
<= 5 /* IPv4 */
1381 && i
< 4 /* host, not port */
1382 && XINT (p
->contents
[i
]) > 255)
1385 args
[i
+ 1] = p
->contents
[i
];
1388 return Fformat (nargs
+ 1, args
);
1391 if (CONSP (address
))
1393 AUTO_STRING (format
, "<Family %d>");
1394 return CALLN (Fformat
, format
, Fcar (address
));
1400 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1401 doc
: /* Return a list of all processes that are Emacs sub-processes. */)
1404 return Fmapcar (Qcdr
, Vprocess_alist
);
1407 /* Starting asynchronous inferior processes. */
1409 static void start_process_unwind (Lisp_Object proc
);
1411 DEFUN ("make-process", Fmake_process
, Smake_process
, 0, MANY
, 0,
1412 doc
: /* Start a program in a subprocess. Return the process object for it.
1414 This is similar to `start-process', but arguments are specified as
1415 keyword/argument pairs. The following arguments are defined:
1417 :name NAME -- NAME is name for process. It is modified if necessary
1420 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
1421 with the process. Process output goes at end of that buffer, unless
1422 you specify an output stream or filter function to handle the output.
1423 BUFFER may be also nil, meaning that this process is not associated
1426 :command COMMAND -- COMMAND is a list starting with the program file
1427 name, followed by strings to give to the program as arguments.
1429 :coding CODING -- If CODING is a symbol, it specifies the coding
1430 system used for both reading and writing for this process. If CODING
1431 is a cons (DECODING . ENCODING), DECODING is used for reading, and
1432 ENCODING is used for writing.
1434 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
1435 the process is running. If BOOL is not given, query before exiting.
1437 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
1438 In the stopped state, a process does not accept incoming data, but you
1439 can send outgoing data. The stopped state is cleared by
1440 `continue-process' and set by `stop-process'.
1442 :connection-type TYPE -- TYPE is control type of device used to
1443 communicate with subprocesses. Values are `pipe' to use a pipe, `pty'
1444 to use a pty, or nil to use the default specified through
1445 `process-connection-type'.
1447 :filter FILTER -- Install FILTER as the process filter.
1449 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
1451 :stderr STDERR -- STDERR is either a buffer or a pipe process attached
1452 to the standard error of subprocess. Specifying this implies
1453 `:connection-type' is set to `pipe'.
1455 usage: (make-process &rest ARGS) */)
1456 (ptrdiff_t nargs
, Lisp_Object
*args
)
1458 Lisp_Object buffer
, name
, command
, program
, proc
, contact
, current_dir
, tem
;
1459 Lisp_Object xstderr
, stderrproc
;
1460 ptrdiff_t count
= SPECPDL_INDEX ();
1466 /* Save arguments for process-contact and clone-process. */
1467 contact
= Flist (nargs
, args
);
1469 buffer
= Fplist_get (contact
, QCbuffer
);
1471 buffer
= Fget_buffer_create (buffer
);
1473 /* Make sure that the child will be able to chdir to the current
1474 buffer's current directory, or its unhandled equivalent. We
1475 can't just have the child check for an error when it does the
1476 chdir, since it's in a vfork. */
1477 current_dir
= encode_current_directory ();
1479 name
= Fplist_get (contact
, QCname
);
1480 CHECK_STRING (name
);
1482 command
= Fplist_get (contact
, QCcommand
);
1483 if (CONSP (command
))
1484 program
= XCAR (command
);
1488 if (!NILP (program
))
1489 CHECK_STRING (program
);
1492 xstderr
= Fplist_get (contact
, QCstderr
);
1493 if (PROCESSP (xstderr
))
1495 if (!PIPECONN_P (xstderr
))
1496 error ("Process is not a pipe process");
1497 stderrproc
= xstderr
;
1499 else if (!NILP (xstderr
))
1501 CHECK_STRING (program
);
1502 stderrproc
= CALLN (Fmake_pipe_process
,
1504 concat2 (name
, build_string (" stderr")),
1506 Fget_buffer_create (xstderr
));
1509 proc
= make_process (name
);
1510 /* If an error occurs and we can't start the process, we want to
1511 remove it from the process list. This means that each error
1512 check in create_process doesn't need to call remove_process
1513 itself; it's all taken care of here. */
1514 record_unwind_protect (start_process_unwind
, proc
);
1516 pset_childp (XPROCESS (proc
), Qt
);
1517 pset_plist (XPROCESS (proc
), Qnil
);
1518 pset_type (XPROCESS (proc
), Qreal
);
1519 pset_buffer (XPROCESS (proc
), buffer
);
1520 pset_sentinel (XPROCESS (proc
), Fplist_get (contact
, QCsentinel
));
1521 pset_filter (XPROCESS (proc
), Fplist_get (contact
, QCfilter
));
1522 pset_command (XPROCESS (proc
), Fcopy_sequence (command
));
1524 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
1525 XPROCESS (proc
)->kill_without_query
= 1;
1526 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
1527 pset_command (XPROCESS (proc
), Qt
);
1529 tem
= Fplist_get (contact
, QCconnection_type
);
1531 XPROCESS (proc
)->pty_flag
= true;
1532 else if (EQ (tem
, Qpipe
))
1533 XPROCESS (proc
)->pty_flag
= false;
1534 else if (NILP (tem
))
1535 XPROCESS (proc
)->pty_flag
= !NILP (Vprocess_connection_type
);
1537 report_file_error ("Unknown connection type", tem
);
1539 if (!NILP (stderrproc
))
1541 pset_stderrproc (XPROCESS (proc
), stderrproc
);
1543 XPROCESS (proc
)->pty_flag
= false;
1547 /* AKA GNUTLS_INITSTAGE(proc). */
1548 XPROCESS (proc
)->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
1549 pset_gnutls_cred_type (XPROCESS (proc
), Qnil
);
1552 XPROCESS (proc
)->adaptive_read_buffering
1553 = (NILP (Vprocess_adaptive_read_buffering
) ? 0
1554 : EQ (Vprocess_adaptive_read_buffering
, Qt
) ? 1 : 2);
1556 /* Make the process marker point into the process buffer (if any). */
1557 if (BUFFERP (buffer
))
1558 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1559 BUF_ZV (XBUFFER (buffer
)),
1560 BUF_ZV_BYTE (XBUFFER (buffer
)));
1563 /* Decide coding systems for communicating with the process. Here
1564 we don't setup the structure coding_system nor pay attention to
1565 unibyte mode. They are done in create_process. */
1567 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1568 Lisp_Object coding_systems
= Qt
;
1569 Lisp_Object val
, *args2
;
1571 tem
= Fplist_get (contact
, QCcoding
);
1579 val
= Vcoding_system_for_read
;
1582 ptrdiff_t nargs2
= 3 + XINT (Flength (command
));
1584 SAFE_ALLOCA_LISP (args2
, nargs2
);
1586 args2
[i
++] = Qstart_process
;
1588 args2
[i
++] = buffer
;
1589 for (tem2
= command
; CONSP (tem2
); tem2
= XCDR (tem2
))
1590 args2
[i
++] = XCAR (tem2
);
1591 if (!NILP (program
))
1592 coding_systems
= Ffind_operation_coding_system (nargs2
, args2
);
1593 if (CONSP (coding_systems
))
1594 val
= XCAR (coding_systems
);
1595 else if (CONSP (Vdefault_process_coding_system
))
1596 val
= XCAR (Vdefault_process_coding_system
);
1598 pset_decode_coding_system (XPROCESS (proc
), val
);
1607 val
= Vcoding_system_for_write
;
1610 if (EQ (coding_systems
, Qt
))
1612 ptrdiff_t nargs2
= 3 + XINT (Flength (command
));
1614 SAFE_ALLOCA_LISP (args2
, nargs2
);
1616 args2
[i
++] = Qstart_process
;
1618 args2
[i
++] = buffer
;
1619 for (tem2
= command
; CONSP (tem2
); tem2
= XCDR (tem2
))
1620 args2
[i
++] = XCAR (tem2
);
1621 if (!NILP (program
))
1622 coding_systems
= Ffind_operation_coding_system (nargs2
, args2
);
1624 if (CONSP (coding_systems
))
1625 val
= XCDR (coding_systems
);
1626 else if (CONSP (Vdefault_process_coding_system
))
1627 val
= XCDR (Vdefault_process_coding_system
);
1629 pset_encode_coding_system (XPROCESS (proc
), val
);
1630 /* Note: At this moment, the above coding system may leave
1631 text-conversion or eol-conversion unspecified. They will be
1632 decided after we read output from the process and decode it by
1633 some coding system, or just before we actually send a text to
1638 pset_decoding_buf (XPROCESS (proc
), empty_unibyte_string
);
1639 XPROCESS (proc
)->decoding_carryover
= 0;
1640 pset_encoding_buf (XPROCESS (proc
), empty_unibyte_string
);
1642 XPROCESS (proc
)->inherit_coding_system_flag
1643 = !(NILP (buffer
) || !inherit_process_coding_system
);
1645 if (!NILP (program
))
1647 Lisp_Object program_args
= XCDR (command
);
1649 /* If program file name is not absolute, search our path for it.
1650 Put the name we will really use in TEM. */
1651 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1652 && !(SCHARS (program
) > 1
1653 && IS_DEVICE_SEP (SREF (program
, 1))))
1656 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
,
1657 make_number (X_OK
), false);
1659 report_file_error ("Searching for program", program
);
1660 tem
= Fexpand_file_name (tem
, Qnil
);
1664 if (!NILP (Ffile_directory_p (program
)))
1665 error ("Specified program for new process is a directory");
1669 /* Remove "/:" from TEM. */
1670 tem
= remove_slash_colon (tem
);
1672 Lisp_Object arg_encoding
= Qnil
;
1674 /* Encode the file name and put it in NEW_ARGV.
1675 That's where the child will use it to execute the program. */
1676 tem
= list1 (ENCODE_FILE (tem
));
1677 ptrdiff_t new_argc
= 1;
1679 /* Here we encode arguments by the coding system used for sending
1680 data to the process. We don't support using different coding
1681 systems for encoding arguments and for encoding data sent to the
1684 for (Lisp_Object tem2
= program_args
; CONSP (tem2
); tem2
= XCDR (tem2
))
1686 Lisp_Object arg
= XCAR (tem2
);
1688 if (STRING_MULTIBYTE (arg
))
1690 if (NILP (arg_encoding
))
1691 arg_encoding
= (complement_process_encoding_system
1692 (XPROCESS (proc
)->encode_coding_system
));
1693 arg
= code_convert_string_norecord (arg
, arg_encoding
, 1);
1695 tem
= Fcons (arg
, tem
);
1699 /* Now that everything is encoded we can collect the strings into
1702 SAFE_NALLOCA (new_argv
, 1, new_argc
+ 1);
1703 new_argv
[new_argc
] = 0;
1705 for (ptrdiff_t i
= new_argc
- 1; i
>= 0; i
--)
1707 new_argv
[i
] = SSDATA (XCAR (tem
));
1711 create_process (proc
, new_argv
, current_dir
);
1717 return unbind_to (count
, proc
);
1720 /* This function is the unwind_protect form for Fstart_process. If
1721 PROC doesn't have its pid set, then we know someone has signaled
1722 an error and the process wasn't started successfully, so we should
1723 remove it from the process list. */
1725 start_process_unwind (Lisp_Object proc
)
1727 if (!PROCESSP (proc
))
1730 /* Was PROC started successfully?
1731 -2 is used for a pty with no process, eg for gdb. */
1732 if (XPROCESS (proc
)->pid
<= 0 && XPROCESS (proc
)->pid
!= -2)
1733 remove_process (proc
);
1736 /* If *FD_ADDR is nonnegative, close it, and mark it as closed. */
1739 close_process_fd (int *fd_addr
)
1749 /* Indexes of file descriptors in open_fds. */
1752 /* The pipe from Emacs to its subprocess. */
1754 WRITE_TO_SUBPROCESS
,
1756 /* The main pipe from the subprocess to Emacs. */
1757 READ_FROM_SUBPROCESS
,
1760 /* The pipe from the subprocess to Emacs that is closed when the
1761 subprocess execs. */
1762 READ_FROM_EXEC_MONITOR
,
1766 verify (PROCESS_OPEN_FDS
== EXEC_MONITOR_OUTPUT
+ 1);
1769 create_process (Lisp_Object process
, char **new_argv
, Lisp_Object current_dir
)
1771 struct Lisp_Process
*p
= XPROCESS (process
);
1772 int inchannel
, outchannel
;
1775 int forkin
, forkout
, forkerr
= -1;
1777 char pty_name
[PTY_NAME_SIZE
];
1778 Lisp_Object lisp_pty_name
= Qnil
;
1781 inchannel
= outchannel
= -1;
1784 outchannel
= inchannel
= allocate_pty (pty_name
);
1788 p
->open_fd
[READ_FROM_SUBPROCESS
] = inchannel
;
1789 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1790 /* On most USG systems it does not work to open the pty's tty here,
1791 then close it and reopen it in the child. */
1792 /* Don't let this terminal become our controlling terminal
1793 (in case we don't have one). */
1794 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1796 report_file_error ("Opening pty", Qnil
);
1797 p
->open_fd
[SUBPROCESS_STDIN
] = forkin
;
1799 forkin
= forkout
= -1;
1800 #endif /* not USG, or USG_SUBTTY_WORKS */
1802 lisp_pty_name
= build_string (pty_name
);
1806 if (emacs_pipe (p
->open_fd
+ SUBPROCESS_STDIN
) != 0
1807 || emacs_pipe (p
->open_fd
+ READ_FROM_SUBPROCESS
) != 0)
1808 report_file_error ("Creating pipe", Qnil
);
1809 forkin
= p
->open_fd
[SUBPROCESS_STDIN
];
1810 outchannel
= p
->open_fd
[WRITE_TO_SUBPROCESS
];
1811 inchannel
= p
->open_fd
[READ_FROM_SUBPROCESS
];
1812 forkout
= p
->open_fd
[SUBPROCESS_STDOUT
];
1814 if (!NILP (p
->stderrproc
))
1816 struct Lisp_Process
*pp
= XPROCESS (p
->stderrproc
);
1818 forkerr
= pp
->open_fd
[SUBPROCESS_STDOUT
];
1820 /* Close unnecessary file descriptors. */
1821 close_process_fd (&pp
->open_fd
[WRITE_TO_SUBPROCESS
]);
1822 close_process_fd (&pp
->open_fd
[SUBPROCESS_STDIN
]);
1827 if (emacs_pipe (p
->open_fd
+ READ_FROM_EXEC_MONITOR
) != 0)
1828 report_file_error ("Creating pipe", Qnil
);
1831 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1832 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1834 /* Record this as an active process, with its channels. */
1835 chan_process
[inchannel
] = process
;
1836 p
->infd
= inchannel
;
1837 p
->outfd
= outchannel
;
1839 /* Previously we recorded the tty descriptor used in the subprocess.
1840 It was only used for getting the foreground tty process, so now
1841 we just reopen the device (see emacs_get_tty_pgrp) as this is
1842 more portable (see USG_SUBTTY_WORKS above). */
1844 p
->pty_flag
= pty_flag
;
1845 pset_status (p
, Qrun
);
1847 if (!EQ (p
->command
, Qt
))
1849 FD_SET (inchannel
, &input_wait_mask
);
1850 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1853 if (inchannel
> max_process_desc
)
1854 max_process_desc
= inchannel
;
1856 /* This may signal an error. */
1857 setup_process_coding_systems (process
);
1860 block_child_signal (&oldset
);
1863 /* vfork, and prevent local vars from being clobbered by the vfork. */
1864 Lisp_Object
volatile current_dir_volatile
= current_dir
;
1865 Lisp_Object
volatile lisp_pty_name_volatile
= lisp_pty_name
;
1866 char **volatile new_argv_volatile
= new_argv
;
1867 int volatile forkin_volatile
= forkin
;
1868 int volatile forkout_volatile
= forkout
;
1869 int volatile forkerr_volatile
= forkerr
;
1870 struct Lisp_Process
*p_volatile
= p
;
1874 current_dir
= current_dir_volatile
;
1875 lisp_pty_name
= lisp_pty_name_volatile
;
1876 new_argv
= new_argv_volatile
;
1877 forkin
= forkin_volatile
;
1878 forkout
= forkout_volatile
;
1879 forkerr
= forkerr_volatile
;
1882 pty_flag
= p
->pty_flag
;
1885 #endif /* not WINDOWSNT */
1887 /* Make the pty be the controlling terminal of the process. */
1889 /* First, disconnect its current controlling terminal. */
1890 /* We tried doing setsid only if pty_flag, but it caused
1891 process_set_signal to fail on SGI when using a pipe. */
1893 /* Make the pty's terminal the controlling terminal. */
1894 if (pty_flag
&& forkin
>= 0)
1897 /* We ignore the return value
1898 because faith@cs.unc.edu says that is necessary on Linux. */
1899 ioctl (forkin
, TIOCSCTTY
, 0);
1902 #if defined (LDISC1)
1903 if (pty_flag
&& forkin
>= 0)
1906 tcgetattr (forkin
, &t
);
1908 if (tcsetattr (forkin
, TCSANOW
, &t
) < 0)
1909 emacs_perror ("create_process/tcsetattr LDISC1");
1912 #if defined (NTTYDISC) && defined (TIOCSETD)
1913 if (pty_flag
&& forkin
>= 0)
1915 /* Use new line discipline. */
1916 int ldisc
= NTTYDISC
;
1917 ioctl (forkin
, TIOCSETD
, &ldisc
);
1922 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1923 can do TIOCSPGRP only to the process's controlling tty. */
1926 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1927 I can't test it since I don't have 4.3. */
1928 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1931 ioctl (j
, TIOCNOTTY
, 0);
1935 #endif /* TIOCNOTTY */
1937 #if !defined (DONT_REOPEN_PTY)
1938 /*** There is a suggestion that this ought to be a
1939 conditional on TIOCSPGRP, or !defined TIOCSCTTY.
1940 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1941 that system does seem to need this code, even though
1942 both TIOCSCTTY is defined. */
1943 /* Now close the pty (if we had it open) and reopen it.
1944 This makes the pty the controlling terminal of the subprocess. */
1948 /* I wonder if emacs_close (emacs_open (SSDATA (lisp_pty_name), ...))
1951 emacs_close (forkin
);
1952 forkout
= forkin
= emacs_open (SSDATA (lisp_pty_name
), O_RDWR
, 0);
1956 emacs_perror (SSDATA (lisp_pty_name
));
1957 _exit (EXIT_CANCELED
);
1961 #endif /* not DONT_REOPEN_PTY */
1963 #ifdef SETUP_SLAVE_PTY
1968 #endif /* SETUP_SLAVE_PTY */
1969 #endif /* HAVE_PTYS */
1971 signal (SIGINT
, SIG_DFL
);
1972 signal (SIGQUIT
, SIG_DFL
);
1974 signal (SIGPROF
, SIG_DFL
);
1977 /* Emacs ignores SIGPIPE, but the child should not. */
1978 signal (SIGPIPE
, SIG_DFL
);
1980 /* Stop blocking SIGCHLD in the child. */
1981 unblock_child_signal (&oldset
);
1984 child_setup_tty (forkout
);
1989 pid
= child_setup (forkin
, forkout
, forkerr
, new_argv
, 1, current_dir
);
1990 #else /* not WINDOWSNT */
1991 child_setup (forkin
, forkout
, forkerr
, new_argv
, 1, current_dir
);
1992 #endif /* not WINDOWSNT */
1995 /* Back in the parent process. */
1997 vfork_errno
= errno
;
2002 /* Stop blocking in the parent. */
2003 unblock_child_signal (&oldset
);
2007 report_file_errno ("Doing vfork", Qnil
, vfork_errno
);
2010 /* vfork succeeded. */
2012 /* Close the pipe ends that the child uses, or the child's pty. */
2013 close_process_fd (&p
->open_fd
[SUBPROCESS_STDIN
]);
2014 close_process_fd (&p
->open_fd
[SUBPROCESS_STDOUT
]);
2017 register_child (pid
, inchannel
);
2018 #endif /* WINDOWSNT */
2020 pset_tty_name (p
, lisp_pty_name
);
2023 /* Wait for child_setup to complete in case that vfork is
2024 actually defined as fork. The descriptor
2025 XPROCESS (proc)->open_fd[EXEC_MONITOR_OUTPUT]
2026 of a pipe is closed at the child side either by close-on-exec
2027 on successful execve or the _exit call in child_setup. */
2031 close_process_fd (&p
->open_fd
[EXEC_MONITOR_OUTPUT
]);
2032 emacs_read (p
->open_fd
[READ_FROM_EXEC_MONITOR
], &dummy
, 1);
2033 close_process_fd (&p
->open_fd
[READ_FROM_EXEC_MONITOR
]);
2036 if (!NILP (p
->stderrproc
))
2038 struct Lisp_Process
*pp
= XPROCESS (p
->stderrproc
);
2039 close_process_fd (&pp
->open_fd
[SUBPROCESS_STDOUT
]);
2045 create_pty (Lisp_Object process
)
2047 struct Lisp_Process
*p
= XPROCESS (process
);
2048 char pty_name
[PTY_NAME_SIZE
];
2049 int pty_fd
= !p
->pty_flag
? -1 : allocate_pty (pty_name
);
2053 p
->open_fd
[SUBPROCESS_STDIN
] = pty_fd
;
2054 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
2055 /* On most USG systems it does not work to open the pty's tty here,
2056 then close it and reopen it in the child. */
2057 /* Don't let this terminal become our controlling terminal
2058 (in case we don't have one). */
2059 int forkout
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
2061 report_file_error ("Opening pty", Qnil
);
2062 p
->open_fd
[WRITE_TO_SUBPROCESS
] = forkout
;
2063 #if defined (DONT_REOPEN_PTY)
2064 /* In the case that vfork is defined as fork, the parent process
2065 (Emacs) may send some data before the child process completes
2066 tty options setup. So we setup tty before forking. */
2067 child_setup_tty (forkout
);
2068 #endif /* DONT_REOPEN_PTY */
2069 #endif /* not USG, or USG_SUBTTY_WORKS */
2071 fcntl (pty_fd
, F_SETFL
, O_NONBLOCK
);
2073 /* Record this as an active process, with its channels.
2074 As a result, child_setup will close Emacs's side of the pipes. */
2075 chan_process
[pty_fd
] = process
;
2079 /* Previously we recorded the tty descriptor used in the subprocess.
2080 It was only used for getting the foreground tty process, so now
2081 we just reopen the device (see emacs_get_tty_pgrp) as this is
2082 more portable (see USG_SUBTTY_WORKS above). */
2085 pset_status (p
, Qrun
);
2086 setup_process_coding_systems (process
);
2088 FD_SET (pty_fd
, &input_wait_mask
);
2089 FD_SET (pty_fd
, &non_keyboard_wait_mask
);
2090 if (pty_fd
> max_process_desc
)
2091 max_process_desc
= pty_fd
;
2093 pset_tty_name (p
, build_string (pty_name
));
2099 DEFUN ("make-pipe-process", Fmake_pipe_process
, Smake_pipe_process
,
2101 doc
: /* Create and return a bidirectional pipe process.
2103 In Emacs, pipes are represented by process objects, so input and
2104 output work as for subprocesses, and `delete-process' closes a pipe.
2105 However, a pipe process has no process id, it cannot be signaled,
2106 and the status codes are different from normal processes.
2108 Arguments are specified as keyword/argument pairs. The following
2109 arguments are defined:
2111 :name NAME -- NAME is the name of the process. It is modified if necessary to make it unique.
2113 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2114 with the process. Process output goes at the end of that buffer,
2115 unless you specify an output stream or filter function to handle the
2116 output. If BUFFER is not given, the value of NAME is used.
2118 :coding CODING -- If CODING is a symbol, it specifies the coding
2119 system used for both reading and writing for this process. If CODING
2120 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2121 ENCODING is used for writing.
2123 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2124 the process is running. If BOOL is not given, query before exiting.
2126 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2127 In the stopped state, a pipe process does not accept incoming data,
2128 but you can send outgoing data. The stopped state is cleared by
2129 `continue-process' and set by `stop-process'.
2131 :filter FILTER -- Install FILTER as the process filter.
2133 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2135 usage: (make-pipe-process &rest ARGS) */)
2136 (ptrdiff_t nargs
, Lisp_Object
*args
)
2138 Lisp_Object proc
, contact
;
2139 struct Lisp_Process
*p
;
2140 Lisp_Object name
, buffer
;
2142 ptrdiff_t specpdl_count
;
2143 int inchannel
, outchannel
;
2148 contact
= Flist (nargs
, args
);
2150 name
= Fplist_get (contact
, QCname
);
2151 CHECK_STRING (name
);
2152 proc
= make_process (name
);
2153 specpdl_count
= SPECPDL_INDEX ();
2154 record_unwind_protect (remove_process
, proc
);
2155 p
= XPROCESS (proc
);
2157 if (emacs_pipe (p
->open_fd
+ SUBPROCESS_STDIN
) != 0
2158 || emacs_pipe (p
->open_fd
+ READ_FROM_SUBPROCESS
) != 0)
2159 report_file_error ("Creating pipe", Qnil
);
2160 outchannel
= p
->open_fd
[WRITE_TO_SUBPROCESS
];
2161 inchannel
= p
->open_fd
[READ_FROM_SUBPROCESS
];
2163 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
2164 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
2167 register_aux_fd (inchannel
);
2170 /* Record this as an active process, with its channels. */
2171 chan_process
[inchannel
] = proc
;
2172 p
->infd
= inchannel
;
2173 p
->outfd
= outchannel
;
2175 if (inchannel
> max_process_desc
)
2176 max_process_desc
= inchannel
;
2178 buffer
= Fplist_get (contact
, QCbuffer
);
2181 buffer
= Fget_buffer_create (buffer
);
2182 pset_buffer (p
, buffer
);
2184 pset_childp (p
, contact
);
2185 pset_plist (p
, Fcopy_sequence (Fplist_get (contact
, QCplist
)));
2186 pset_type (p
, Qpipe
);
2187 pset_sentinel (p
, Fplist_get (contact
, QCsentinel
));
2188 pset_filter (p
, Fplist_get (contact
, QCfilter
));
2190 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
2191 p
->kill_without_query
= 1;
2192 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
2193 pset_command (p
, Qt
);
2194 eassert (! p
->pty_flag
);
2196 if (!EQ (p
->command
, Qt
))
2198 FD_SET (inchannel
, &input_wait_mask
);
2199 FD_SET (inchannel
, &non_keyboard_wait_mask
);
2201 p
->adaptive_read_buffering
2202 = (NILP (Vprocess_adaptive_read_buffering
) ? 0
2203 : EQ (Vprocess_adaptive_read_buffering
, Qt
) ? 1 : 2);
2205 /* Make the process marker point into the process buffer (if any). */
2206 if (BUFFERP (buffer
))
2207 set_marker_both (p
->mark
, buffer
,
2208 BUF_ZV (XBUFFER (buffer
)),
2209 BUF_ZV_BYTE (XBUFFER (buffer
)));
2212 /* Setup coding systems for communicating with the network stream. */
2214 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
2215 Lisp_Object coding_systems
= Qt
;
2218 tem
= Fplist_get (contact
, QCcoding
);
2226 else if (!NILP (Vcoding_system_for_read
))
2227 val
= Vcoding_system_for_read
;
2228 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2229 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2230 /* We dare not decode end-of-line format by setting VAL to
2231 Qraw_text, because the existing Emacs Lisp libraries
2232 assume that they receive bare code including a sequence of
2237 if (CONSP (coding_systems
))
2238 val
= XCAR (coding_systems
);
2239 else if (CONSP (Vdefault_process_coding_system
))
2240 val
= XCAR (Vdefault_process_coding_system
);
2244 pset_decode_coding_system (p
, val
);
2252 else if (!NILP (Vcoding_system_for_write
))
2253 val
= Vcoding_system_for_write
;
2254 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
2258 if (CONSP (coding_systems
))
2259 val
= XCDR (coding_systems
);
2260 else if (CONSP (Vdefault_process_coding_system
))
2261 val
= XCDR (Vdefault_process_coding_system
);
2265 pset_encode_coding_system (p
, val
);
2267 /* This may signal an error. */
2268 setup_process_coding_systems (proc
);
2270 specpdl_ptr
= specpdl
+ specpdl_count
;
2276 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2277 The address family of sa is not included in the result. */
2280 conv_sockaddr_to_lisp (struct sockaddr
*sa
, ptrdiff_t len
)
2282 Lisp_Object address
;
2285 struct Lisp_Vector
*p
;
2287 /* Workaround for a bug in getsockname on BSD: Names bound to
2288 sockets in the UNIX domain are inaccessible; getsockname returns
2289 a zero length name. */
2290 if (len
< offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
))
2291 return empty_unibyte_string
;
2293 switch (sa
->sa_family
)
2297 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2298 len
= sizeof (sin
->sin_addr
) + 1;
2299 address
= Fmake_vector (make_number (len
), Qnil
);
2300 p
= XVECTOR (address
);
2301 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2302 cp
= (unsigned char *) &sin
->sin_addr
;
2308 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2309 uint16_t *ip6
= (uint16_t *) &sin6
->sin6_addr
;
2310 len
= sizeof (sin6
->sin6_addr
) / 2 + 1;
2311 address
= Fmake_vector (make_number (len
), Qnil
);
2312 p
= XVECTOR (address
);
2313 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
2314 for (i
= 0; i
< len
; i
++)
2315 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
2319 #ifdef HAVE_LOCAL_SOCKETS
2322 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2323 ptrdiff_t name_length
= len
- offsetof (struct sockaddr_un
, sun_path
);
2324 /* If the first byte is NUL, the name is a Linux abstract
2325 socket name, and the name can contain embedded NULs. If
2326 it's not, we have a NUL-terminated string. Be careful not
2327 to walk past the end of the object looking for the name
2328 terminator, however. */
2329 if (name_length
> 0 && sockun
->sun_path
[0] != '\0')
2331 const char *terminator
2332 = memchr (sockun
->sun_path
, '\0', name_length
);
2335 name_length
= terminator
- (const char *) sockun
->sun_path
;
2338 return make_unibyte_string (sockun
->sun_path
, name_length
);
2342 len
-= offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
);
2343 address
= Fcons (make_number (sa
->sa_family
),
2344 Fmake_vector (make_number (len
), Qnil
));
2345 p
= XVECTOR (XCDR (address
));
2346 cp
= (unsigned char *) &sa
->sa_family
+ sizeof (sa
->sa_family
);
2352 p
->contents
[i
++] = make_number (*cp
++);
2357 /* Convert an internal struct addrinfo to a Lisp object. */
2360 conv_addrinfo_to_lisp (struct addrinfo
*res
)
2362 Lisp_Object protocol
= make_number (res
->ai_protocol
);
2363 eassert (XINT (protocol
) == res
->ai_protocol
);
2364 return Fcons (protocol
, conv_sockaddr_to_lisp (res
->ai_addr
, res
->ai_addrlen
));
2368 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2371 get_lisp_to_sockaddr_size (Lisp_Object address
, int *familyp
)
2373 struct Lisp_Vector
*p
;
2375 if (VECTORP (address
))
2377 p
= XVECTOR (address
);
2378 if (p
->header
.size
== 5)
2381 return sizeof (struct sockaddr_in
);
2384 else if (p
->header
.size
== 9)
2386 *familyp
= AF_INET6
;
2387 return sizeof (struct sockaddr_in6
);
2391 #ifdef HAVE_LOCAL_SOCKETS
2392 else if (STRINGP (address
))
2394 *familyp
= AF_LOCAL
;
2395 return sizeof (struct sockaddr_un
);
2398 else if (CONSP (address
) && TYPE_RANGED_INTEGERP (int, XCAR (address
))
2399 && VECTORP (XCDR (address
)))
2401 struct sockaddr
*sa
;
2402 p
= XVECTOR (XCDR (address
));
2403 if (MAX_ALLOCA
- sizeof sa
->sa_family
< p
->header
.size
)
2405 *familyp
= XINT (XCAR (address
));
2406 return p
->header
.size
+ sizeof (sa
->sa_family
);
2411 /* Convert an address object (vector or string) to an internal sockaddr.
2413 The address format has been basically validated by
2414 get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid;
2415 it could have come from user data. So if FAMILY is not valid,
2416 we return after zeroing *SA. */
2419 conv_lisp_to_sockaddr (int family
, Lisp_Object address
, struct sockaddr
*sa
, int len
)
2421 register struct Lisp_Vector
*p
;
2422 register unsigned char *cp
= NULL
;
2426 memset (sa
, 0, len
);
2428 if (VECTORP (address
))
2430 p
= XVECTOR (address
);
2431 if (family
== AF_INET
)
2433 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2434 len
= sizeof (sin
->sin_addr
) + 1;
2435 hostport
= XINT (p
->contents
[--len
]);
2436 sin
->sin_port
= htons (hostport
);
2437 cp
= (unsigned char *)&sin
->sin_addr
;
2438 sa
->sa_family
= family
;
2441 else if (family
== AF_INET6
)
2443 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2444 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2445 len
= sizeof (sin6
->sin6_addr
) / 2 + 1;
2446 hostport
= XINT (p
->contents
[--len
]);
2447 sin6
->sin6_port
= htons (hostport
);
2448 for (i
= 0; i
< len
; i
++)
2449 if (INTEGERP (p
->contents
[i
]))
2451 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2454 sa
->sa_family
= family
;
2461 else if (STRINGP (address
))
2463 #ifdef HAVE_LOCAL_SOCKETS
2464 if (family
== AF_LOCAL
)
2466 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2467 cp
= SDATA (address
);
2468 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2469 sockun
->sun_path
[i
] = *cp
++;
2470 sa
->sa_family
= family
;
2477 p
= XVECTOR (XCDR (address
));
2478 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2481 for (i
= 0; i
< len
; i
++)
2482 if (INTEGERP (p
->contents
[i
]))
2483 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2486 #ifdef DATAGRAM_SOCKETS
2487 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2489 doc
: /* Get the current datagram address associated with PROCESS.
2490 If PROCESS is a non-blocking network process that hasn't been fully
2491 set up yet, this function will block until socket setup has completed. */)
2492 (Lisp_Object process
)
2496 CHECK_PROCESS (process
);
2498 if (NETCONN_P (process
))
2499 wait_for_socket_fds (process
, "process-datagram-address");
2501 if (!DATAGRAM_CONN_P (process
))
2504 channel
= XPROCESS (process
)->infd
;
2505 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2506 datagram_address
[channel
].len
);
2509 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2511 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2512 Return nil upon error setting address, ADDRESS otherwise.
2514 If PROCESS is a non-blocking network process that hasn't been fully
2515 set up yet, this function will block until socket setup has completed. */)
2516 (Lisp_Object process
, Lisp_Object address
)
2522 CHECK_PROCESS (process
);
2524 if (NETCONN_P (process
))
2525 wait_for_socket_fds (process
, "set-process-datagram-address");
2527 if (!DATAGRAM_CONN_P (process
))
2530 channel
= XPROCESS (process
)->infd
;
2532 len
= get_lisp_to_sockaddr_size (address
, &family
);
2533 if (len
== 0 || datagram_address
[channel
].len
!= len
)
2535 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2541 static const struct socket_options
{
2542 /* The name of this option. Should be lowercase version of option
2543 name without SO_ prefix. */
2545 /* Option level SOL_... */
2547 /* Option number SO_... */
2549 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2550 enum { OPIX_NONE
= 0, OPIX_MISC
= 1, OPIX_REUSEADDR
= 2 } optbit
;
2551 } socket_options
[] =
2553 #ifdef SO_BINDTODEVICE
2554 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2557 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2560 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2563 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2566 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2569 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2572 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2575 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2577 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2580 /* Set option OPT to value VAL on socket S.
2582 Return (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2583 Signals an error if setting a known option fails.
2587 set_socket_option (int s
, Lisp_Object opt
, Lisp_Object val
)
2590 const struct socket_options
*sopt
;
2595 name
= SSDATA (SYMBOL_NAME (opt
));
2596 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2597 if (strcmp (name
, sopt
->name
) == 0)
2600 switch (sopt
->opttype
)
2605 optval
= NILP (val
) ? 0 : 1;
2606 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2607 &optval
, sizeof (optval
));
2614 if (TYPE_RANGED_INTEGERP (int, val
))
2615 optval
= XINT (val
);
2617 error ("Bad option value for %s", name
);
2618 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2619 &optval
, sizeof (optval
));
2623 #ifdef SO_BINDTODEVICE
2626 char devname
[IFNAMSIZ
+ 1];
2628 /* This is broken, at least in the Linux 2.4 kernel.
2629 To unbind, the arg must be a zero integer, not the empty string.
2630 This should work on all systems. KFS. 2003-09-23. */
2631 memset (devname
, 0, sizeof devname
);
2634 char *arg
= SSDATA (val
);
2635 int len
= min (strlen (arg
), IFNAMSIZ
);
2636 memcpy (devname
, arg
, len
);
2638 else if (!NILP (val
))
2639 error ("Bad option value for %s", name
);
2640 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2649 struct linger linger
;
2652 linger
.l_linger
= 0;
2653 if (TYPE_RANGED_INTEGERP (int, val
))
2654 linger
.l_linger
= XINT (val
);
2656 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2657 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2658 &linger
, sizeof (linger
));
2669 int setsockopt_errno
= errno
;
2670 report_file_errno ("Cannot set network option", list2 (opt
, val
),
2674 return (1 << sopt
->optbit
);
2678 DEFUN ("set-network-process-option",
2679 Fset_network_process_option
, Sset_network_process_option
,
2681 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2682 See `make-network-process' for a list of options and values.
2683 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2684 OPTION is not a supported option, return nil instead; otherwise return t.
2686 If PROCESS is a non-blocking network process that hasn't been fully
2687 set up yet, this function will block until socket setup has completed. */)
2688 (Lisp_Object process
, Lisp_Object option
, Lisp_Object value
, Lisp_Object no_error
)
2691 struct Lisp_Process
*p
;
2693 CHECK_PROCESS (process
);
2694 p
= XPROCESS (process
);
2695 if (!NETCONN1_P (p
))
2696 error ("Process is not a network process");
2698 wait_for_socket_fds (process
, "set-network-process-option");
2702 error ("Process is not running");
2704 if (set_socket_option (s
, option
, value
))
2706 pset_childp (p
, Fplist_put (p
->childp
, option
, value
));
2710 if (NILP (no_error
))
2711 error ("Unknown or unsupported option");
2717 DEFUN ("serial-process-configure",
2718 Fserial_process_configure
,
2719 Sserial_process_configure
,
2721 doc
: /* Configure speed, bytesize, etc. of a serial process.
2723 Arguments are specified as keyword/argument pairs. Attributes that
2724 are not given are re-initialized from the process's current
2725 configuration (available via the function `process-contact') or set to
2726 reasonable default values. The following arguments are defined:
2732 -- Any of these arguments can be given to identify the process that is
2733 to be configured. If none of these arguments is given, the current
2734 buffer's process is used.
2736 :speed SPEED -- SPEED is the speed of the serial port in bits per
2737 second, also called baud rate. Any value can be given for SPEED, but
2738 most serial ports work only at a few defined values between 1200 and
2739 115200, with 9600 being the most common value. If SPEED is nil, the
2740 serial port is not configured any further, i.e., all other arguments
2741 are ignored. This may be useful for special serial ports such as
2742 Bluetooth-to-serial converters which can only be configured through AT
2743 commands. A value of nil for SPEED can be used only when passed
2744 through `make-serial-process' or `serial-term'.
2746 :bytesize BYTESIZE -- BYTESIZE is the number of bits per byte, which
2747 can be 7 or 8. If BYTESIZE is not given or nil, a value of 8 is used.
2749 :parity PARITY -- PARITY can be nil (don't use parity), the symbol
2750 `odd' (use odd parity), or the symbol `even' (use even parity). If
2751 PARITY is not given, no parity is used.
2753 :stopbits STOPBITS -- STOPBITS is the number of stopbits used to
2754 terminate a byte transmission. STOPBITS can be 1 or 2. If STOPBITS
2755 is not given or nil, 1 stopbit is used.
2757 :flowcontrol FLOWCONTROL -- FLOWCONTROL determines the type of
2758 flowcontrol to be used, which is either nil (don't use flowcontrol),
2759 the symbol `hw' (use RTS/CTS hardware flowcontrol), or the symbol `sw'
2760 \(use XON/XOFF software flowcontrol). If FLOWCONTROL is not given, no
2761 flowcontrol is used.
2763 `serial-process-configure' is called by `make-serial-process' for the
2764 initial configuration of the serial port.
2768 \(serial-process-configure :process "/dev/ttyS0" :speed 1200)
2770 \(serial-process-configure
2771 :buffer "COM1" :stopbits 1 :parity \\='odd :flowcontrol \\='hw)
2773 \(serial-process-configure :port "\\\\.\\COM13" :bytesize 7)
2775 usage: (serial-process-configure &rest ARGS) */)
2776 (ptrdiff_t nargs
, Lisp_Object
*args
)
2778 struct Lisp_Process
*p
;
2779 Lisp_Object contact
= Qnil
;
2780 Lisp_Object proc
= Qnil
;
2782 contact
= Flist (nargs
, args
);
2784 proc
= Fplist_get (contact
, QCprocess
);
2786 proc
= Fplist_get (contact
, QCname
);
2788 proc
= Fplist_get (contact
, QCbuffer
);
2790 proc
= Fplist_get (contact
, QCport
);
2791 proc
= get_process (proc
);
2792 p
= XPROCESS (proc
);
2793 if (!EQ (p
->type
, Qserial
))
2794 error ("Not a serial process");
2796 if (NILP (Fplist_get (p
->childp
, QCspeed
)))
2799 serial_configure (p
, contact
);
2803 DEFUN ("make-serial-process", Fmake_serial_process
, Smake_serial_process
,
2805 doc
: /* Create and return a serial port process.
2807 In Emacs, serial port connections are represented by process objects,
2808 so input and output work as for subprocesses, and `delete-process'
2809 closes a serial port connection. However, a serial process has no
2810 process id, it cannot be signaled, and the status codes are different
2811 from normal processes.
2813 `make-serial-process' creates a process and a buffer, on which you
2814 probably want to use `process-send-string'. Try \\[serial-term] for
2815 an interactive terminal. See below for examples.
2817 Arguments are specified as keyword/argument pairs. The following
2818 arguments are defined:
2820 :port PORT -- (mandatory) PORT is the path or name of the serial port.
2821 For example, this could be "/dev/ttyS0" on Unix. On Windows, this
2822 could be "COM1", or "\\\\.\\COM10" for ports higher than COM9 (double
2823 the backslashes in strings).
2825 :speed SPEED -- (mandatory) is handled by `serial-process-configure',
2826 which this function calls.
2828 :name NAME -- NAME is the name of the process. If NAME is not given,
2829 the value of PORT is used.
2831 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2832 with the process. Process output goes at the end of that buffer,
2833 unless you specify an output stream or filter function to handle the
2834 output. If BUFFER is not given, the value of NAME is used.
2836 :coding CODING -- If CODING is a symbol, it specifies the coding
2837 system used for both reading and writing for this process. If CODING
2838 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2839 ENCODING is used for writing.
2841 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2842 the process is running. If BOOL is not given, query before exiting.
2844 :stop BOOL -- Start process in the `stopped' state if BOOL is non-nil.
2845 In the stopped state, a serial process does not accept incoming data,
2846 but you can send outgoing data. The stopped state is cleared by
2847 `continue-process' and set by `stop-process'.
2849 :filter FILTER -- Install FILTER as the process filter.
2851 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2853 :plist PLIST -- Install PLIST as the initial plist of the process.
2859 -- This function calls `serial-process-configure' to handle these
2862 The original argument list, possibly modified by later configuration,
2863 is available via the function `process-contact'.
2867 \(make-serial-process :port "/dev/ttyS0" :speed 9600)
2869 \(make-serial-process :port "COM1" :speed 115200 :stopbits 2)
2871 \(make-serial-process :port "\\\\.\\COM13" :speed 1200 :bytesize 7 :parity \\='odd)
2873 \(make-serial-process :port "/dev/tty.BlueConsole-SPP-1" :speed nil)
2875 usage: (make-serial-process &rest ARGS) */)
2876 (ptrdiff_t nargs
, Lisp_Object
*args
)
2879 Lisp_Object proc
, contact
, port
;
2880 struct Lisp_Process
*p
;
2881 Lisp_Object name
, buffer
;
2882 Lisp_Object tem
, val
;
2883 ptrdiff_t specpdl_count
;
2888 contact
= Flist (nargs
, args
);
2890 port
= Fplist_get (contact
, QCport
);
2892 error ("No port specified");
2893 CHECK_STRING (port
);
2895 if (NILP (Fplist_member (contact
, QCspeed
)))
2896 error (":speed not specified");
2897 if (!NILP (Fplist_get (contact
, QCspeed
)))
2898 CHECK_NUMBER (Fplist_get (contact
, QCspeed
));
2900 name
= Fplist_get (contact
, QCname
);
2903 CHECK_STRING (name
);
2904 proc
= make_process (name
);
2905 specpdl_count
= SPECPDL_INDEX ();
2906 record_unwind_protect (remove_process
, proc
);
2907 p
= XPROCESS (proc
);
2909 fd
= serial_open (port
);
2910 p
->open_fd
[SUBPROCESS_STDIN
] = fd
;
2913 if (fd
> max_process_desc
)
2914 max_process_desc
= fd
;
2915 chan_process
[fd
] = proc
;
2917 buffer
= Fplist_get (contact
, QCbuffer
);
2920 buffer
= Fget_buffer_create (buffer
);
2921 pset_buffer (p
, buffer
);
2923 pset_childp (p
, contact
);
2924 pset_plist (p
, Fcopy_sequence (Fplist_get (contact
, QCplist
)));
2925 pset_type (p
, Qserial
);
2926 pset_sentinel (p
, Fplist_get (contact
, QCsentinel
));
2927 pset_filter (p
, Fplist_get (contact
, QCfilter
));
2929 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
2930 p
->kill_without_query
= 1;
2931 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
2932 pset_command (p
, Qt
);
2933 eassert (! p
->pty_flag
);
2935 if (!EQ (p
->command
, Qt
))
2937 FD_SET (fd
, &input_wait_mask
);
2938 FD_SET (fd
, &non_keyboard_wait_mask
);
2941 if (BUFFERP (buffer
))
2943 set_marker_both (p
->mark
, buffer
,
2944 BUF_ZV (XBUFFER (buffer
)),
2945 BUF_ZV_BYTE (XBUFFER (buffer
)));
2948 tem
= Fplist_member (contact
, QCcoding
);
2949 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
2955 val
= XCAR (XCDR (tem
));
2959 else if (!NILP (Vcoding_system_for_read
))
2960 val
= Vcoding_system_for_read
;
2961 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2962 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2964 pset_decode_coding_system (p
, val
);
2969 val
= XCAR (XCDR (tem
));
2973 else if (!NILP (Vcoding_system_for_write
))
2974 val
= Vcoding_system_for_write
;
2975 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2976 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2978 pset_encode_coding_system (p
, val
);
2980 setup_process_coding_systems (proc
);
2981 pset_decoding_buf (p
, empty_unibyte_string
);
2982 p
->decoding_carryover
= 0;
2983 pset_encoding_buf (p
, empty_unibyte_string
);
2984 p
->inherit_coding_system_flag
2985 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
2987 Fserial_process_configure (nargs
, args
);
2989 specpdl_ptr
= specpdl
+ specpdl_count
;
2995 set_network_socket_coding_system (Lisp_Object proc
, Lisp_Object host
,
2996 Lisp_Object service
, Lisp_Object name
)
2999 struct Lisp_Process
*p
= XPROCESS (proc
);
3000 Lisp_Object contact
= p
->childp
;
3001 Lisp_Object coding_systems
= Qt
;
3004 tem
= Fplist_member (contact
, QCcoding
);
3005 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3006 tem
= Qnil
; /* No error message (too late!). */
3008 /* Setup coding systems for communicating with the network stream. */
3009 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3013 val
= XCAR (XCDR (tem
));
3017 else if (!NILP (Vcoding_system_for_read
))
3018 val
= Vcoding_system_for_read
;
3019 else if ((!NILP (p
->buffer
)
3020 && NILP (BVAR (XBUFFER (p
->buffer
), enable_multibyte_characters
)))
3021 || (NILP (p
->buffer
)
3022 && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
3023 /* We dare not decode end-of-line format by setting VAL to
3024 Qraw_text, because the existing Emacs Lisp libraries
3025 assume that they receive bare code including a sequence of
3030 if (NILP (host
) || NILP (service
))
3031 coding_systems
= Qnil
;
3033 coding_systems
= CALLN (Ffind_operation_coding_system
,
3034 Qopen_network_stream
, name
, p
->buffer
,
3036 if (CONSP (coding_systems
))
3037 val
= XCAR (coding_systems
);
3038 else if (CONSP (Vdefault_process_coding_system
))
3039 val
= XCAR (Vdefault_process_coding_system
);
3043 pset_decode_coding_system (p
, val
);
3047 val
= XCAR (XCDR (tem
));
3051 else if (!NILP (Vcoding_system_for_write
))
3052 val
= Vcoding_system_for_write
;
3053 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3057 if (EQ (coding_systems
, Qt
))
3059 if (NILP (host
) || NILP (service
))
3060 coding_systems
= Qnil
;
3062 coding_systems
= CALLN (Ffind_operation_coding_system
,
3063 Qopen_network_stream
, name
, p
->buffer
,
3066 if (CONSP (coding_systems
))
3067 val
= XCDR (coding_systems
);
3068 else if (CONSP (Vdefault_process_coding_system
))
3069 val
= XCDR (Vdefault_process_coding_system
);
3073 pset_encode_coding_system (p
, val
);
3075 pset_decoding_buf (p
, empty_unibyte_string
);
3076 p
->decoding_carryover
= 0;
3077 pset_encoding_buf (p
, empty_unibyte_string
);
3079 p
->inherit_coding_system_flag
3080 = !(!NILP (tem
) || NILP (p
->buffer
) || !inherit_process_coding_system
);
3085 finish_after_tls_connection (Lisp_Object proc
)
3087 struct Lisp_Process
*p
= XPROCESS (proc
);
3088 Lisp_Object contact
= p
->childp
;
3089 Lisp_Object result
= Qt
;
3091 if (!NILP (Ffboundp (Qnsm_verify_connection
)))
3092 result
= call3 (Qnsm_verify_connection
,
3094 Fplist_get (contact
, QChost
),
3095 Fplist_get (contact
, QCservice
));
3099 pset_status (p
, list2 (Qfailed
,
3100 build_string ("The Network Security Manager stopped the connections")));
3101 deactivate_process (proc
);
3105 /* If we cleared the connection wait mask before we did
3106 the TLS setup, then we have to say that the process
3107 is finally "open" here. */
3108 if (! FD_ISSET (p
->outfd
, &connect_wait_mask
))
3110 pset_status (p
, Qrun
);
3111 /* Execute the sentinel here. If we had relied on
3112 status_notify to do it later, it will read input
3113 from the process before calling the sentinel. */
3114 exec_sentinel (proc
, build_string ("open\n"));
3121 connect_network_socket (Lisp_Object proc
, Lisp_Object addrinfos
,
3122 Lisp_Object use_external_socket_p
)
3124 ptrdiff_t count
= SPECPDL_INDEX ();
3126 int s
= -1, outch
, inch
;
3129 struct sockaddr
*sa
= NULL
;
3132 struct Lisp_Process
*p
= XPROCESS (proc
);
3133 Lisp_Object contact
= p
->childp
;
3135 int socket_to_use
= -1;
3137 if (!NILP (use_external_socket_p
))
3139 socket_to_use
= external_sock_fd
;
3141 /* Ensure we don't consume the external socket twice. */
3142 external_sock_fd
= -1;
3145 /* Do this in case we never enter the while-loop below. */
3146 count1
= SPECPDL_INDEX ();
3149 while (!NILP (addrinfos
))
3151 Lisp_Object addrinfo
= XCAR (addrinfos
);
3152 addrinfos
= XCDR (addrinfos
);
3153 int protocol
= XINT (XCAR (addrinfo
));
3154 Lisp_Object ip_address
= XCDR (addrinfo
);
3160 addrlen
= get_lisp_to_sockaddr_size (ip_address
, &family
);
3163 sa
= xmalloc (addrlen
);
3164 conv_lisp_to_sockaddr (family
, ip_address
, sa
, addrlen
);
3169 int socktype
= p
->socktype
| SOCK_CLOEXEC
;
3170 if (p
->is_non_blocking_client
)
3171 socktype
|= SOCK_NONBLOCK
;
3172 s
= socket (family
, socktype
, protocol
);
3180 if (p
->is_non_blocking_client
&& ! (SOCK_NONBLOCK
&& socket_to_use
< 0))
3182 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3192 #ifdef DATAGRAM_SOCKETS
3193 if (!p
->is_server
&& p
->socktype
== SOCK_DGRAM
)
3195 #endif /* DATAGRAM_SOCKETS */
3197 /* Make us close S if quit. */
3198 record_unwind_protect_int (close_file_unwind
, s
);
3200 /* Parse network options in the arg list. We simply ignore anything
3201 which isn't a known option (including other keywords). An error
3202 is signaled if setting a known option fails. */
3204 Lisp_Object params
= contact
, key
, val
;
3206 while (!NILP (params
))
3208 key
= XCAR (params
);
3209 params
= XCDR (params
);
3210 val
= XCAR (params
);
3211 params
= XCDR (params
);
3212 optbits
|= set_socket_option (s
, key
, val
);
3218 /* Configure as a server socket. */
3220 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3221 explicit :reuseaddr key to override this. */
3222 #ifdef HAVE_LOCAL_SOCKETS
3223 if (family
!= AF_LOCAL
)
3225 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3228 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3229 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3232 /* If passed a socket descriptor, it should be already bound. */
3233 if (socket_to_use
< 0 && bind (s
, sa
, addrlen
) != 0)
3234 report_file_error ("Cannot bind server socket", Qnil
);
3236 #ifdef HAVE_GETSOCKNAME
3239 struct sockaddr_in sa1
;
3240 socklen_t len1
= sizeof (sa1
);
3241 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3243 Lisp_Object service
;
3244 service
= make_number (ntohs (sa1
.sin_port
));
3245 contact
= Fplist_put (contact
, QCservice
, service
);
3246 /* Save the port number so that we can stash it in
3247 the process object later. */
3248 ((struct sockaddr_in
*)sa
)->sin_port
= sa1
.sin_port
;
3253 if (p
->socktype
!= SOCK_DGRAM
&& listen (s
, p
->backlog
))
3254 report_file_error ("Cannot listen on server socket", Qnil
);
3262 ret
= connect (s
, sa
, addrlen
);
3265 if (ret
== 0 || xerrno
== EISCONN
)
3267 /* The unwind-protect will be discarded afterwards.
3268 Likewise for immediate_quit. */
3272 if (p
->is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3276 if (xerrno
== EINTR
)
3278 /* Unlike most other syscalls connect() cannot be called
3279 again. (That would return EALREADY.) The proper way to
3280 wait for completion is pselect(). */
3288 sc
= pselect (s
+ 1, NULL
, &fdset
, NULL
, NULL
, NULL
);
3294 report_file_error ("Failed select", Qnil
);
3298 len
= sizeof xerrno
;
3299 eassert (FD_ISSET (s
, &fdset
));
3300 if (getsockopt (s
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &len
) < 0)
3301 report_file_error ("Failed getsockopt", Qnil
);
3304 if (NILP (addrinfos
))
3305 report_file_errno ("Failed connect", Qnil
, xerrno
);
3307 #endif /* !WINDOWSNT */
3311 /* Discard the unwind protect closing S. */
3312 specpdl_ptr
= specpdl
+ count1
;
3317 if (xerrno
== EINTR
)
3324 #ifdef DATAGRAM_SOCKETS
3325 if (p
->socktype
== SOCK_DGRAM
)
3327 if (datagram_address
[s
].sa
)
3330 datagram_address
[s
].sa
= xmalloc (addrlen
);
3331 datagram_address
[s
].len
= addrlen
;
3335 memset (datagram_address
[s
].sa
, 0, addrlen
);
3336 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3339 ptrdiff_t rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3340 if (rlen
!= 0 && rfamily
== family
3342 conv_lisp_to_sockaddr (rfamily
, remote
,
3343 datagram_address
[s
].sa
, rlen
);
3347 memcpy (datagram_address
[s
].sa
, sa
, addrlen
);
3351 contact
= Fplist_put (contact
, p
->is_server
? QClocal
: QCremote
,
3352 conv_sockaddr_to_lisp (sa
, addrlen
));
3353 #ifdef HAVE_GETSOCKNAME
3356 struct sockaddr_in sa1
;
3357 socklen_t len1
= sizeof (sa1
);
3358 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3359 contact
= Fplist_put (contact
, QClocal
,
3360 conv_sockaddr_to_lisp ((struct sockaddr
*)&sa1
, len1
));
3369 /* If non-blocking got this far - and failed - assume non-blocking is
3370 not supported after all. This is probably a wrong assumption, but
3371 the normal blocking calls to open-network-stream handles this error
3373 if (p
->is_non_blocking_client
)
3376 report_file_errno ((p
->is_server
3377 ? "make server process failed"
3378 : "make client process failed"),
3385 chan_process
[inch
] = proc
;
3387 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3389 p
= XPROCESS (proc
);
3390 p
->open_fd
[SUBPROCESS_STDIN
] = inch
;
3394 /* Discard the unwind protect for closing S, if any. */
3395 specpdl_ptr
= specpdl
+ count1
;
3397 /* Unwind bind_polling_period and request_sigio. */
3398 unbind_to (count
, Qnil
);
3400 if (p
->is_server
&& p
->socktype
!= SOCK_DGRAM
)
3401 pset_status (p
, Qlisten
);
3403 /* Make the process marker point into the process buffer (if any). */
3404 if (BUFFERP (p
->buffer
))
3405 set_marker_both (p
->mark
, p
->buffer
,
3406 BUF_ZV (XBUFFER (p
->buffer
)),
3407 BUF_ZV_BYTE (XBUFFER (p
->buffer
)));
3409 if (p
->is_non_blocking_client
)
3411 /* We may get here if connect did succeed immediately. However,
3412 in that case, we still need to signal this like a non-blocking
3414 if (! (connecting_status (p
->status
)
3415 && EQ (XCDR (p
->status
), addrinfos
)))
3416 pset_status (p
, Fcons (Qconnect
, addrinfos
));
3417 if (!FD_ISSET (inch
, &connect_wait_mask
))
3419 FD_SET (inch
, &connect_wait_mask
);
3420 FD_SET (inch
, &write_mask
);
3421 num_pending_connects
++;
3425 /* A server may have a client filter setting of Qt, but it must
3426 still listen for incoming connects unless it is stopped. */
3427 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3428 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3430 FD_SET (inch
, &input_wait_mask
);
3431 FD_SET (inch
, &non_keyboard_wait_mask
);
3434 if (inch
> max_process_desc
)
3435 max_process_desc
= inch
;
3437 /* Set up the masks based on the process filter. */
3438 set_process_filter_masks (p
);
3440 setup_process_coding_systems (proc
);
3443 /* Continue the asynchronous connection. */
3444 if (!NILP (p
->gnutls_boot_parameters
))
3446 Lisp_Object boot
, params
= p
->gnutls_boot_parameters
;
3448 boot
= Fgnutls_boot (proc
, XCAR (params
), XCDR (params
));
3449 p
->gnutls_boot_parameters
= Qnil
;
3451 if (p
->gnutls_initstage
== GNUTLS_STAGE_READY
)
3452 /* Run sentinels, etc. */
3453 finish_after_tls_connection (proc
);
3454 else if (p
->gnutls_initstage
!= GNUTLS_STAGE_HANDSHAKE_TRIED
)
3456 deactivate_process (proc
);
3458 pset_status (p
, list2 (Qfailed
,
3459 build_string ("TLS negotiation failed")));
3461 pset_status (p
, list2 (Qfailed
, boot
));
3468 /* Create a network stream/datagram client/server process. Treated
3469 exactly like a normal process when reading and writing. Primary
3470 differences are in status display and process deletion. A network
3471 connection has no PID; you cannot signal it. All you can do is
3472 stop/continue it and deactivate/close it via delete-process. */
3474 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
3476 doc
: /* Create and return a network server or client process.
3478 In Emacs, network connections are represented by process objects, so
3479 input and output work as for subprocesses and `delete-process' closes
3480 a network connection. However, a network process has no process id,
3481 it cannot be signaled, and the status codes are different from normal
3484 Arguments are specified as keyword/argument pairs. The following
3485 arguments are defined:
3487 :name NAME -- NAME is name for process. It is modified if necessary
3490 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
3491 with the process. Process output goes at end of that buffer, unless
3492 you specify an output stream or filter function to handle the output.
3493 BUFFER may be also nil, meaning that this process is not associated
3496 :host HOST -- HOST is name of the host to connect to, or its IP
3497 address. The symbol `local' specifies the local host. If specified
3498 for a server process, it must be a valid name or address for the local
3499 host, and only clients connecting to that address will be accepted.
3501 :service SERVICE -- SERVICE is name of the service desired, or an
3502 integer specifying a port number to connect to. If SERVICE is t,
3503 a random port number is selected for the server. A port number can
3504 be specified as an integer string, e.g., "80", as well as an integer.
3506 :type TYPE -- TYPE is the type of connection. The default (nil) is a
3507 stream type connection, `datagram' creates a datagram type connection,
3508 `seqpacket' creates a reliable datagram connection.
3510 :family FAMILY -- FAMILY is the address (and protocol) family for the
3511 service specified by HOST and SERVICE. The default (nil) is to use
3512 whatever address family (IPv4 or IPv6) that is defined for the host
3513 and port number specified by HOST and SERVICE. Other address families
3515 local -- for a local (i.e. UNIX) address specified by SERVICE.
3516 ipv4 -- use IPv4 address family only.
3517 ipv6 -- use IPv6 address family only.
3519 :local ADDRESS -- ADDRESS is the local address used for the connection.
3520 This parameter is ignored when opening a client process. When specified
3521 for a server process, the FAMILY, HOST and SERVICE args are ignored.
3523 :remote ADDRESS -- ADDRESS is the remote partner's address for the
3524 connection. This parameter is ignored when opening a stream server
3525 process. For a datagram server process, it specifies the initial
3526 setting of the remote datagram address. When specified for a client
3527 process, the FAMILY, HOST, and SERVICE args are ignored.
3529 The format of ADDRESS depends on the address family:
3530 - An IPv4 address is represented as an vector of integers [A B C D P]
3531 corresponding to numeric IP address A.B.C.D and port number P.
3532 - A local address is represented as a string with the address in the
3533 local address space.
3534 - An "unsupported family" address is represented by a cons (F . AV)
3535 where F is the family number and AV is a vector containing the socket
3536 address data with one element per address data byte. Do not rely on
3537 this format in portable code, as it may depend on implementation
3538 defined constants, data sizes, and data structure alignment.
3540 :coding CODING -- If CODING is a symbol, it specifies the coding
3541 system used for both reading and writing for this process. If CODING
3542 is a cons (DECODING . ENCODING), DECODING is used for reading, and
3543 ENCODING is used for writing.
3545 :nowait BOOL -- If NOWAIT is non-nil for a stream type client
3546 process, return without waiting for the connection to complete;
3547 instead, the sentinel function will be called with second arg matching
3548 "open" (if successful) or "failed" when the connect completes.
3549 Default is to use a blocking connect (i.e. wait) for stream type
3552 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
3553 running when Emacs is exited.
3555 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
3556 In the stopped state, a server process does not accept new
3557 connections, and a client process does not handle incoming traffic.
3558 The stopped state is cleared by `continue-process' and set by
3561 :filter FILTER -- Install FILTER as the process filter.
3563 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
3564 process filter are multibyte, otherwise they are unibyte.
3565 If this keyword is not specified, the strings are multibyte if
3566 the default value of `enable-multibyte-characters' is non-nil.
3568 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
3570 :log LOG -- Install LOG as the server process log function. This
3571 function is called when the server accepts a network connection from a
3572 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
3573 is the server process, CLIENT is the new process for the connection,
3574 and MESSAGE is a string.
3576 :plist PLIST -- Install PLIST as the new process's initial plist.
3578 :tls-parameters LIST -- is a list that should be supplied if you're
3579 opening a TLS connection. The first element is the TLS type (either
3580 `gnutls-x509pki' or `gnutls-anon'), and the remaining elements should
3581 be a keyword list accepted by gnutls-boot (as returned by
3582 `gnutls-boot-parameters').
3584 :server QLEN -- if QLEN is non-nil, create a server process for the
3585 specified FAMILY, SERVICE, and connection type (stream or datagram).
3586 If QLEN is an integer, it is used as the max. length of the server's
3587 pending connection queue (also known as the backlog); the default
3588 queue length is 5. Default is to create a client process.
3590 The following network options can be specified for this connection:
3592 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
3593 :dontroute BOOL -- Only send to directly connected hosts.
3594 :keepalive BOOL -- Send keep-alive messages on network stream.
3595 :linger BOOL or TIMEOUT -- Send queued messages before closing.
3596 :oobinline BOOL -- Place out-of-band data in receive data stream.
3597 :priority INT -- Set protocol defined priority for sent packets.
3598 :reuseaddr BOOL -- Allow reusing a recently used local address
3599 (this is allowed by default for a server process).
3600 :bindtodevice NAME -- bind to interface NAME. Using this may require
3601 special privileges on some systems.
3602 :use-external-socket BOOL -- Use any pre-allocated sockets that have
3603 been passed to Emacs. If Emacs wasn't
3604 passed a socket, this option is silently
3608 Consult the relevant system programmer's manual pages for more
3609 information on using these options.
3612 A server process will listen for and accept connections from clients.
3613 When a client connection is accepted, a new network process is created
3614 for the connection with the following parameters:
3616 - The client's process name is constructed by concatenating the server
3617 process's NAME and a client identification string.
3618 - If the FILTER argument is non-nil, the client process will not get a
3619 separate process buffer; otherwise, the client's process buffer is a newly
3620 created buffer named after the server process's BUFFER name or process
3621 NAME concatenated with the client identification string.
3622 - The connection type and the process filter and sentinel parameters are
3623 inherited from the server process's TYPE, FILTER and SENTINEL.
3624 - The client process's contact info is set according to the client's
3625 addressing information (typically an IP address and a port number).
3626 - The client process's plist is initialized from the server's plist.
3628 Notice that the FILTER and SENTINEL args are never used directly by
3629 the server process. Also, the BUFFER argument is not used directly by
3630 the server process, but via the optional :log function, accepted (and
3631 failed) connections may be logged in the server process's buffer.
3633 The original argument list, modified with the actual connection
3634 information, is available via the `process-contact' function.
3636 usage: (make-network-process &rest ARGS) */)
3637 (ptrdiff_t nargs
, Lisp_Object
*args
)
3640 Lisp_Object contact
;
3641 struct Lisp_Process
*p
;
3642 const char *portstring
;
3643 ptrdiff_t portstringlen ATTRIBUTE_UNUSED
;
3644 char portbuf
[INT_BUFSIZE_BOUND (EMACS_INT
)];
3645 #ifdef HAVE_LOCAL_SOCKETS
3646 struct sockaddr_un address_un
;
3650 Lisp_Object name
, buffer
, host
, service
, address
;
3651 Lisp_Object filter
, sentinel
, use_external_socket_p
;
3652 Lisp_Object addrinfos
= Qnil
;
3655 enum { any_protocol
= 0 };
3656 #ifdef HAVE_GETADDRINFO_A
3657 struct gaicb
*dns_request
= NULL
;
3659 ptrdiff_t count
= SPECPDL_INDEX ();
3664 /* Save arguments for process-contact and clone-process. */
3665 contact
= Flist (nargs
, args
);
3668 /* Ensure socket support is loaded if available. */
3669 init_winsock (TRUE
);
3672 /* :type TYPE (nil: stream, datagram */
3673 tem
= Fplist_get (contact
, QCtype
);
3675 socktype
= SOCK_STREAM
;
3676 #ifdef DATAGRAM_SOCKETS
3677 else if (EQ (tem
, Qdatagram
))
3678 socktype
= SOCK_DGRAM
;
3680 #ifdef HAVE_SEQPACKET
3681 else if (EQ (tem
, Qseqpacket
))
3682 socktype
= SOCK_SEQPACKET
;
3685 error ("Unsupported connection type");
3687 name
= Fplist_get (contact
, QCname
);
3688 buffer
= Fplist_get (contact
, QCbuffer
);
3689 filter
= Fplist_get (contact
, QCfilter
);
3690 sentinel
= Fplist_get (contact
, QCsentinel
);
3691 use_external_socket_p
= Fplist_get (contact
, QCuse_external_socket
);
3693 CHECK_STRING (name
);
3695 /* :local ADDRESS or :remote ADDRESS */
3696 tem
= Fplist_get (contact
, QCserver
);
3698 address
= Fplist_get (contact
, QCremote
);
3700 address
= Fplist_get (contact
, QClocal
);
3701 if (!NILP (address
))
3703 host
= service
= Qnil
;
3705 if (!get_lisp_to_sockaddr_size (address
, &family
))
3706 error ("Malformed :address");
3708 addrinfos
= list1 (Fcons (make_number (any_protocol
), address
));
3712 /* :family FAMILY -- nil (for Inet), local, or integer. */
3713 tem
= Fplist_get (contact
, QCfamily
);
3722 #ifdef HAVE_LOCAL_SOCKETS
3723 else if (EQ (tem
, Qlocal
))
3727 else if (EQ (tem
, Qipv6
))
3730 else if (EQ (tem
, Qipv4
))
3732 else if (TYPE_RANGED_INTEGERP (int, tem
))
3733 family
= XINT (tem
);
3735 error ("Unknown address family");
3737 /* :service SERVICE -- string, integer (port number), or t (random port). */
3738 service
= Fplist_get (contact
, QCservice
);
3740 /* :host HOST -- hostname, ip address, or 'local for localhost. */
3741 host
= Fplist_get (contact
, QChost
);
3744 /* The "connection" function gets it bind info from the address we're
3745 given, so use this dummy address if nothing is specified. */
3746 #ifdef HAVE_LOCAL_SOCKETS
3747 if (family
!= AF_LOCAL
)
3749 host
= build_string ("127.0.0.1");
3753 if (EQ (host
, Qlocal
))
3754 /* Depending on setup, "localhost" may map to different IPv4 and/or
3755 IPv6 addresses, so it's better to be explicit (Bug#6781). */
3756 host
= build_string ("127.0.0.1");
3757 CHECK_STRING (host
);
3760 #ifdef HAVE_LOCAL_SOCKETS
3761 if (family
== AF_LOCAL
)
3765 message (":family local ignores the :host property");
3766 contact
= Fplist_put (contact
, QChost
, Qnil
);
3769 CHECK_STRING (service
);
3770 if (sizeof address_un
.sun_path
<= SBYTES (service
))
3771 error ("Service name too long");
3772 addrinfos
= list1 (Fcons (make_number (any_protocol
), service
));
3777 /* Slow down polling to every ten seconds.
3778 Some kernels have a bug which causes retrying connect to fail
3779 after a connect. Polling can interfere with gethostbyname too. */
3780 #ifdef POLL_FOR_INPUT
3781 if (socktype
!= SOCK_DGRAM
)
3783 record_unwind_protect_void (run_all_atimers
);
3784 bind_polling_period (10);
3790 /* SERVICE can either be a string or int.
3791 Convert to a C string for later use by getaddrinfo. */
3792 if (EQ (service
, Qt
))
3797 else if (INTEGERP (service
))
3799 portstring
= portbuf
;
3800 portstringlen
= sprintf (portbuf
, "%"pI
"d", XINT (service
));
3804 CHECK_STRING (service
);
3805 portstring
= SSDATA (service
);
3806 portstringlen
= SBYTES (service
);
3810 #ifdef HAVE_GETADDRINFO_A
3811 if (!NILP (host
) && !NILP (Fplist_get (contact
, QCnowait
)))
3813 ptrdiff_t hostlen
= SBYTES (host
);
3817 struct addrinfo hints
;
3818 char str
[FLEXIBLE_ARRAY_MEMBER
];
3819 } *req
= xmalloc (offsetof (struct req
, str
)
3820 + hostlen
+ 1 + portstringlen
+ 1);
3821 dns_request
= &req
->gaicb
;
3822 dns_request
->ar_name
= req
->str
;
3823 dns_request
->ar_service
= req
->str
+ hostlen
+ 1;
3824 dns_request
->ar_request
= &req
->hints
;
3825 dns_request
->ar_result
= NULL
;
3826 memset (&req
->hints
, 0, sizeof req
->hints
);
3827 req
->hints
.ai_family
= family
;
3828 req
->hints
.ai_socktype
= socktype
;
3829 strcpy (req
->str
, SSDATA (host
));
3830 strcpy (req
->str
+ hostlen
+ 1, portstring
);
3832 int ret
= getaddrinfo_a (GAI_NOWAIT
, &dns_request
, 1, NULL
);
3834 error ("%s/%s getaddrinfo_a error %d", SSDATA (host
), portstring
, ret
);
3838 #endif /* HAVE_GETADDRINFO_A */
3840 /* If we have a host, use getaddrinfo to resolve both host and service.
3841 Otherwise, use getservbyname to lookup the service. */
3845 struct addrinfo
*res
, *lres
;
3851 struct addrinfo hints
;
3852 memset (&hints
, 0, sizeof hints
);
3853 hints
.ai_family
= family
;
3854 hints
.ai_socktype
= socktype
;
3856 ret
= getaddrinfo (SSDATA (host
), portstring
, &hints
, &res
);
3858 #ifdef HAVE_GAI_STRERROR
3860 synchronize_system_messages_locale ();
3861 char const *str
= gai_strerror (ret
);
3862 if (! NILP (Vlocale_coding_system
))
3863 str
= SSDATA (code_convert_string_norecord
3864 (build_string (str
), Vlocale_coding_system
, 0));
3865 error ("%s/%s %s", SSDATA (host
), portstring
, str
);
3868 error ("%s/%s getaddrinfo error %d", SSDATA (host
), portstring
, ret
);
3872 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3873 addrinfos
= Fcons (conv_addrinfo_to_lisp (lres
), addrinfos
);
3875 addrinfos
= Fnreverse (addrinfos
);
3882 /* No hostname has been specified (e.g., a local server process). */
3884 if (EQ (service
, Qt
))
3886 else if (INTEGERP (service
))
3887 port
= XINT (service
);
3890 CHECK_STRING (service
);
3893 if (SBYTES (service
) != 0)
3895 /* Allow the service to be a string containing the port number,
3896 because that's allowed if you have getaddrbyname. */
3898 long int lport
= strtol (SSDATA (service
), &service_end
, 10);
3899 if (service_end
== SSDATA (service
) + SBYTES (service
))
3903 struct servent
*svc_info
3904 = getservbyname (SSDATA (service
),
3905 socktype
== SOCK_DGRAM
? "udp" : "tcp");
3907 port
= ntohs (svc_info
->s_port
);
3912 if (! (0 <= port
&& port
< 1 << 16))
3914 AUTO_STRING (unknown_service
, "Unknown service: %s");
3915 xsignal1 (Qerror
, CALLN (Fformat
, unknown_service
, service
));
3921 buffer
= Fget_buffer_create (buffer
);
3922 proc
= make_process (name
);
3923 p
= XPROCESS (proc
);
3924 pset_childp (p
, contact
);
3925 pset_plist (p
, Fcopy_sequence (Fplist_get (contact
, QCplist
)));
3926 pset_type (p
, Qnetwork
);
3928 pset_buffer (p
, buffer
);
3929 pset_sentinel (p
, sentinel
);
3930 pset_filter (p
, filter
);
3931 pset_log (p
, Fplist_get (contact
, QClog
));
3932 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3933 p
->kill_without_query
= 1;
3934 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3935 pset_command (p
, Qt
);
3938 p
->is_non_blocking_client
= false;
3939 p
->is_server
= false;
3941 p
->socktype
= socktype
;
3942 #ifdef HAVE_GETADDRINFO_A
3943 p
->dns_request
= NULL
;
3946 tem
= Fplist_get (contact
, QCtls_parameters
);
3948 p
->gnutls_boot_parameters
= tem
;
3951 set_network_socket_coding_system (proc
, host
, service
, name
);
3953 unbind_to (count
, Qnil
);
3956 tem
= Fplist_get (contact
, QCserver
);
3959 /* Don't support network sockets when non-blocking mode is
3960 not available, since a blocked Emacs is not useful. */
3961 p
->is_server
= true;
3962 if (TYPE_RANGED_INTEGERP (int, tem
))
3963 p
->backlog
= XINT (tem
);
3967 if (!p
->is_server
&& socktype
!= SOCK_DGRAM
3968 && !NILP (Fplist_get (contact
, QCnowait
)))
3969 p
->is_non_blocking_client
= true;
3971 #ifdef HAVE_GETADDRINFO_A
3972 /* With async address resolution, the list of addresses is empty, so
3973 postpone connecting to the server. */
3974 if (!p
->is_server
&& NILP (addrinfos
))
3976 p
->dns_request
= dns_request
;
3977 p
->status
= list1 (Qconnect
);
3982 connect_network_socket (proc
, addrinfos
, use_external_socket_p
);
3987 #ifdef HAVE_NET_IF_H
3991 network_interface_list (void)
3993 struct ifconf ifconf
;
3994 struct ifreq
*ifreq
;
3996 ptrdiff_t buf_size
= 512;
4001 s
= socket (AF_INET
, SOCK_STREAM
| SOCK_CLOEXEC
, 0);
4004 count
= SPECPDL_INDEX ();
4005 record_unwind_protect_int (close_file_unwind
, s
);
4009 buf
= xpalloc (buf
, &buf_size
, 1, INT_MAX
, 1);
4010 ifconf
.ifc_buf
= buf
;
4011 ifconf
.ifc_len
= buf_size
;
4012 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
4019 while (ifconf
.ifc_len
== buf_size
);
4021 res
= unbind_to (count
, Qnil
);
4022 ifreq
= ifconf
.ifc_req
;
4023 while ((char *) ifreq
< (char *) ifconf
.ifc_req
+ ifconf
.ifc_len
)
4025 struct ifreq
*ifq
= ifreq
;
4026 #ifdef HAVE_STRUCT_IFREQ_IFR_ADDR_SA_LEN
4027 #define SIZEOF_IFREQ(sif) \
4028 ((sif)->ifr_addr.sa_len < sizeof (struct sockaddr) \
4029 ? sizeof (*(sif)) : sizeof ((sif)->ifr_name) + (sif)->ifr_addr.sa_len)
4031 int len
= SIZEOF_IFREQ (ifq
);
4033 int len
= sizeof (*ifreq
);
4035 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
4036 ifreq
= (struct ifreq
*) ((char *) ifreq
+ len
);
4038 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
4041 memcpy (namebuf
, ifq
->ifr_name
, sizeof (ifq
->ifr_name
));
4042 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
4043 res
= Fcons (Fcons (build_string (namebuf
),
4044 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
4045 sizeof (struct sockaddr
))),
4052 #endif /* SIOCGIFCONF */
4054 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
4058 const char *flag_sym
;
4061 static const struct ifflag_def ifflag_table
[] = {
4065 #ifdef IFF_BROADCAST
4066 { IFF_BROADCAST
, "broadcast" },
4069 { IFF_DEBUG
, "debug" },
4072 { IFF_LOOPBACK
, "loopback" },
4074 #ifdef IFF_POINTOPOINT
4075 { IFF_POINTOPOINT
, "pointopoint" },
4078 { IFF_RUNNING
, "running" },
4081 { IFF_NOARP
, "noarp" },
4084 { IFF_PROMISC
, "promisc" },
4086 #ifdef IFF_NOTRAILERS
4087 #ifdef NS_IMPL_COCOA
4088 /* Really means smart, notrailers is obsolete. */
4089 { IFF_NOTRAILERS
, "smart" },
4091 { IFF_NOTRAILERS
, "notrailers" },
4095 { IFF_ALLMULTI
, "allmulti" },
4098 { IFF_MASTER
, "master" },
4101 { IFF_SLAVE
, "slave" },
4103 #ifdef IFF_MULTICAST
4104 { IFF_MULTICAST
, "multicast" },
4107 { IFF_PORTSEL
, "portsel" },
4109 #ifdef IFF_AUTOMEDIA
4110 { IFF_AUTOMEDIA
, "automedia" },
4113 { IFF_DYNAMIC
, "dynamic" },
4116 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress. */
4119 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions. */
4122 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit. */
4125 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit. */
4128 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit. */
4134 network_interface_info (Lisp_Object ifname
)
4137 Lisp_Object res
= Qnil
;
4142 #if (! (defined SIOCGIFHWADDR && defined HAVE_STRUCT_IFREQ_IFR_HWADDR) \
4143 && defined HAVE_GETIFADDRS && defined LLADDR)
4144 struct ifaddrs
*ifap
;
4147 CHECK_STRING (ifname
);
4149 if (sizeof rq
.ifr_name
<= SBYTES (ifname
))
4150 error ("interface name too long");
4151 lispstpcpy (rq
.ifr_name
, ifname
);
4153 s
= socket (AF_INET
, SOCK_STREAM
| SOCK_CLOEXEC
, 0);
4156 count
= SPECPDL_INDEX ();
4157 record_unwind_protect_int (close_file_unwind
, s
);
4160 #if defined (SIOCGIFFLAGS) && defined (HAVE_STRUCT_IFREQ_IFR_FLAGS)
4161 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
4163 int flags
= rq
.ifr_flags
;
4164 const struct ifflag_def
*fp
;
4167 /* If flags is smaller than int (i.e. short) it may have the high bit set
4168 due to IFF_MULTICAST. In that case, sign extending it into
4170 if (flags
< 0 && sizeof (rq
.ifr_flags
) < sizeof (flags
))
4171 flags
= (unsigned short) rq
.ifr_flags
;
4174 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
4176 if (flags
& fp
->flag_bit
)
4178 elt
= Fcons (intern (fp
->flag_sym
), elt
);
4179 flags
-= fp
->flag_bit
;
4182 for (fnum
= 0; flags
&& fnum
< 32; flags
>>= 1, fnum
++)
4186 elt
= Fcons (make_number (fnum
), elt
);
4191 res
= Fcons (elt
, res
);
4194 #if defined (SIOCGIFHWADDR) && defined (HAVE_STRUCT_IFREQ_IFR_HWADDR)
4195 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
4197 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
4198 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
4202 for (n
= 0; n
< 6; n
++)
4203 p
->contents
[n
] = make_number (((unsigned char *)
4204 &rq
.ifr_hwaddr
.sa_data
[0])
4206 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
4208 #elif defined (HAVE_GETIFADDRS) && defined (LLADDR)
4209 if (getifaddrs (&ifap
) != -1)
4211 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
4212 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
4215 for (it
= ifap
; it
!= NULL
; it
= it
->ifa_next
)
4217 struct sockaddr_dl
*sdl
= (struct sockaddr_dl
*) it
->ifa_addr
;
4218 unsigned char linkaddr
[6];
4221 if (it
->ifa_addr
->sa_family
!= AF_LINK
4222 || strcmp (it
->ifa_name
, SSDATA (ifname
)) != 0
4223 || sdl
->sdl_alen
!= 6)
4226 memcpy (linkaddr
, LLADDR (sdl
), sdl
->sdl_alen
);
4227 for (n
= 0; n
< 6; n
++)
4228 p
->contents
[n
] = make_number (linkaddr
[n
]);
4230 elt
= Fcons (make_number (it
->ifa_addr
->sa_family
), hwaddr
);
4234 #ifdef HAVE_FREEIFADDRS
4238 #endif /* HAVE_GETIFADDRS && LLADDR */
4240 res
= Fcons (elt
, res
);
4243 #if defined (SIOCGIFNETMASK) && (defined (HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined (HAVE_STRUCT_IFREQ_IFR_ADDR))
4244 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
4247 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
4248 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
4250 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
4254 res
= Fcons (elt
, res
);
4257 #if defined (SIOCGIFBRDADDR) && defined (HAVE_STRUCT_IFREQ_IFR_BROADADDR)
4258 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
4261 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
4264 res
= Fcons (elt
, res
);
4267 #if defined (SIOCGIFADDR) && defined (HAVE_STRUCT_IFREQ_IFR_ADDR)
4268 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
4271 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
4274 res
= Fcons (elt
, res
);
4276 return unbind_to (count
, any
? res
: Qnil
);
4278 #endif /* !SIOCGIFADDR && !SIOCGIFHWADDR && !SIOCGIFFLAGS */
4279 #endif /* defined (HAVE_NET_IF_H) */
4281 DEFUN ("network-interface-list", Fnetwork_interface_list
,
4282 Snetwork_interface_list
, 0, 0, 0,
4283 doc
: /* Return an alist of all network interfaces and their network address.
4284 Each element is a cons, the car of which is a string containing the
4285 interface name, and the cdr is the network address in internal
4286 format; see the description of ADDRESS in `make-network-process'.
4288 If the information is not available, return nil. */)
4291 #if (defined HAVE_NET_IF_H && defined SIOCGIFCONF) || defined WINDOWSNT
4292 return network_interface_list ();
4298 DEFUN ("network-interface-info", Fnetwork_interface_info
,
4299 Snetwork_interface_info
, 1, 1, 0,
4300 doc
: /* Return information about network interface named IFNAME.
4301 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
4302 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
4303 NETMASK is the layer 3 network mask, HWADDR is the layer 2 address, and
4304 FLAGS is the current flags of the interface.
4306 Data that is unavailable is returned as nil. */)
4307 (Lisp_Object ifname
)
4309 #if ((defined HAVE_NET_IF_H \
4310 && (defined SIOCGIFADDR || defined SIOCGIFHWADDR \
4311 || defined SIOCGIFFLAGS)) \
4312 || defined WINDOWSNT)
4313 return network_interface_info (ifname
);
4319 /* Turn off input and output for process PROC. */
4322 deactivate_process (Lisp_Object proc
)
4325 struct Lisp_Process
*p
= XPROCESS (proc
);
4329 /* Delete GnuTLS structures in PROC, if any. */
4330 emacs_gnutls_deinit (proc
);
4331 #endif /* HAVE_GNUTLS */
4333 if (p
->read_output_delay
> 0)
4335 if (--process_output_delay_count
< 0)
4336 process_output_delay_count
= 0;
4337 p
->read_output_delay
= 0;
4338 p
->read_output_skip
= 0;
4341 /* Beware SIGCHLD hereabouts. */
4343 for (i
= 0; i
< PROCESS_OPEN_FDS
; i
++)
4344 close_process_fd (&p
->open_fd
[i
]);
4346 inchannel
= p
->infd
;
4351 #ifdef DATAGRAM_SOCKETS
4352 if (DATAGRAM_CHAN_P (inchannel
))
4354 xfree (datagram_address
[inchannel
].sa
);
4355 datagram_address
[inchannel
].sa
= 0;
4356 datagram_address
[inchannel
].len
= 0;
4359 chan_process
[inchannel
] = Qnil
;
4360 FD_CLR (inchannel
, &input_wait_mask
);
4361 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
4362 if (FD_ISSET (inchannel
, &connect_wait_mask
))
4364 FD_CLR (inchannel
, &connect_wait_mask
);
4365 FD_CLR (inchannel
, &write_mask
);
4366 if (--num_pending_connects
< 0)
4369 if (inchannel
== max_process_desc
)
4371 /* We just closed the highest-numbered process input descriptor,
4372 so recompute the highest-numbered one now. */
4376 while (0 <= i
&& NILP (chan_process
[i
]));
4378 max_process_desc
= i
;
4384 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
4386 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
4387 It is given to their filter functions.
4388 Optional argument PROCESS means do not return until output has been
4389 received from PROCESS.
4391 Optional second argument SECONDS and third argument MILLISEC
4392 specify a timeout; return after that much time even if there is
4393 no subprocess output. If SECONDS is a floating point number,
4394 it specifies a fractional number of seconds to wait.
4395 The MILLISEC argument is obsolete and should be avoided.
4397 If optional fourth argument JUST-THIS-ONE is non-nil, accept output
4398 from PROCESS only, suspending reading output from other processes.
4399 If JUST-THIS-ONE is an integer, don't run any timers either.
4400 Return non-nil if we received any output from PROCESS (or, if PROCESS
4401 is nil, from any process) before the timeout expired. */)
4402 (register Lisp_Object process
, Lisp_Object seconds
, Lisp_Object millisec
, Lisp_Object just_this_one
)
4407 if (! NILP (process
))
4408 CHECK_PROCESS (process
);
4410 just_this_one
= Qnil
;
4412 if (!NILP (millisec
))
4413 { /* Obsolete calling convention using integers rather than floats. */
4414 CHECK_NUMBER (millisec
);
4416 seconds
= make_float (XINT (millisec
) / 1000.0);
4419 CHECK_NUMBER (seconds
);
4420 seconds
= make_float (XINT (millisec
) / 1000.0 + XINT (seconds
));
4427 if (!NILP (seconds
))
4429 if (INTEGERP (seconds
))
4431 if (XINT (seconds
) > 0)
4433 secs
= XINT (seconds
);
4437 else if (FLOATP (seconds
))
4439 if (XFLOAT_DATA (seconds
) > 0)
4441 struct timespec t
= dtotimespec (XFLOAT_DATA (seconds
));
4442 secs
= min (t
.tv_sec
, WAIT_READING_MAX
);
4447 wrong_type_argument (Qnumberp
, seconds
);
4449 else if (! NILP (process
))
4453 ((wait_reading_process_output (secs
, nsecs
, 0, 0,
4455 !NILP (process
) ? XPROCESS (process
) : NULL
,
4456 (NILP (just_this_one
) ? 0
4457 : !INTEGERP (just_this_one
) ? 1 : -1))
4462 /* Accept a connection for server process SERVER on CHANNEL. */
4464 static EMACS_INT connect_counter
= 0;
4467 server_accept_connection (Lisp_Object server
, int channel
)
4469 Lisp_Object proc
, caller
, name
, buffer
;
4470 Lisp_Object contact
, host
, service
;
4471 struct Lisp_Process
*ps
= XPROCESS (server
);
4472 struct Lisp_Process
*p
;
4476 struct sockaddr_in in
;
4478 struct sockaddr_in6 in6
;
4480 #ifdef HAVE_LOCAL_SOCKETS
4481 struct sockaddr_un un
;
4484 socklen_t len
= sizeof saddr
;
4487 s
= accept4 (channel
, &saddr
.sa
, &len
, SOCK_CLOEXEC
);
4492 if (!would_block (code
) && !NILP (ps
->log
))
4493 call3 (ps
->log
, server
, Qnil
,
4494 concat3 (build_string ("accept failed with code"),
4495 Fnumber_to_string (make_number (code
)),
4496 build_string ("\n")));
4500 count
= SPECPDL_INDEX ();
4501 record_unwind_protect_int (close_file_unwind
, s
);
4505 /* Setup a new process to handle the connection. */
4507 /* Generate a unique identification of the caller, and build contact
4508 information for this process. */
4511 switch (saddr
.sa
.sa_family
)
4515 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4517 AUTO_STRING (ipv4_format
, "%d.%d.%d.%d");
4518 host
= CALLN (Fformat
, ipv4_format
,
4519 make_number (ip
[0]), make_number (ip
[1]),
4520 make_number (ip
[2]), make_number (ip
[3]));
4521 service
= make_number (ntohs (saddr
.in
.sin_port
));
4522 AUTO_STRING (caller_format
, " <%s:%d>");
4523 caller
= CALLN (Fformat
, caller_format
, host
, service
);
4530 Lisp_Object args
[9];
4531 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4534 AUTO_STRING (ipv6_format
, "%x:%x:%x:%x:%x:%x:%x:%x");
4535 args
[0] = ipv6_format
;
4536 for (i
= 0; i
< 8; i
++)
4537 args
[i
+ 1] = make_number (ntohs (ip6
[i
]));
4538 host
= CALLMANY (Fformat
, args
);
4539 service
= make_number (ntohs (saddr
.in
.sin_port
));
4540 AUTO_STRING (caller_format
, " <[%s]:%d>");
4541 caller
= CALLN (Fformat
, caller_format
, host
, service
);
4546 #ifdef HAVE_LOCAL_SOCKETS
4550 caller
= Fnumber_to_string (make_number (connect_counter
));
4551 AUTO_STRING (space_less_than
, " <");
4552 AUTO_STRING (greater_than
, ">");
4553 caller
= concat3 (space_less_than
, caller
, greater_than
);
4557 /* Create a new buffer name for this process if it doesn't have a
4558 filter. The new buffer name is based on the buffer name or
4559 process name of the server process concatenated with the caller
4562 if (!(EQ (ps
->filter
, Qinternal_default_process_filter
)
4563 || EQ (ps
->filter
, Qt
)))
4567 buffer
= ps
->buffer
;
4569 buffer
= Fbuffer_name (buffer
);
4574 buffer
= concat2 (buffer
, caller
);
4575 buffer
= Fget_buffer_create (buffer
);
4579 /* Generate a unique name for the new server process. Combine the
4580 server process name with the caller identification. */
4582 name
= concat2 (ps
->name
, caller
);
4583 proc
= make_process (name
);
4585 chan_process
[s
] = proc
;
4587 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4589 p
= XPROCESS (proc
);
4591 /* Build new contact information for this setup. */
4592 contact
= Fcopy_sequence (ps
->childp
);
4593 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4594 contact
= Fplist_put (contact
, QChost
, host
);
4595 if (!NILP (service
))
4596 contact
= Fplist_put (contact
, QCservice
, service
);
4597 contact
= Fplist_put (contact
, QCremote
,
4598 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4599 #ifdef HAVE_GETSOCKNAME
4601 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4602 contact
= Fplist_put (contact
, QClocal
,
4603 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4606 pset_childp (p
, contact
);
4607 pset_plist (p
, Fcopy_sequence (ps
->plist
));
4608 pset_type (p
, Qnetwork
);
4610 pset_buffer (p
, buffer
);
4611 pset_sentinel (p
, ps
->sentinel
);
4612 pset_filter (p
, ps
->filter
);
4613 pset_command (p
, Qnil
);
4616 /* Discard the unwind protect for closing S. */
4617 specpdl_ptr
= specpdl
+ count
;
4619 p
->open_fd
[SUBPROCESS_STDIN
] = s
;
4622 pset_status (p
, Qrun
);
4624 /* Client processes for accepted connections are not stopped initially. */
4625 if (!EQ (p
->filter
, Qt
))
4627 FD_SET (s
, &input_wait_mask
);
4628 FD_SET (s
, &non_keyboard_wait_mask
);
4631 if (s
> max_process_desc
)
4632 max_process_desc
= s
;
4634 /* Setup coding system for new process based on server process.
4635 This seems to be the proper thing to do, as the coding system
4636 of the new process should reflect the settings at the time the
4637 server socket was opened; not the current settings. */
4639 pset_decode_coding_system (p
, ps
->decode_coding_system
);
4640 pset_encode_coding_system (p
, ps
->encode_coding_system
);
4641 setup_process_coding_systems (proc
);
4643 pset_decoding_buf (p
, empty_unibyte_string
);
4644 p
->decoding_carryover
= 0;
4645 pset_encoding_buf (p
, empty_unibyte_string
);
4647 p
->inherit_coding_system_flag
4648 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4650 AUTO_STRING (dash
, "-");
4651 AUTO_STRING (nl
, "\n");
4652 Lisp_Object host_string
= STRINGP (host
) ? host
: dash
;
4654 if (!NILP (ps
->log
))
4656 AUTO_STRING (accept_from
, "accept from ");
4657 call3 (ps
->log
, server
, proc
, concat3 (accept_from
, host_string
, nl
));
4660 AUTO_STRING (open_from
, "open from ");
4661 exec_sentinel (proc
, concat3 (open_from
, host_string
, nl
));
4664 #ifdef HAVE_GETADDRINFO_A
4666 check_for_dns (Lisp_Object proc
)
4668 struct Lisp_Process
*p
= XPROCESS (proc
);
4669 Lisp_Object addrinfos
= Qnil
;
4672 if (! p
->dns_request
)
4675 int ret
= gai_error (p
->dns_request
);
4676 if (ret
== EAI_INPROGRESS
)
4679 /* We got a response. */
4682 struct addrinfo
*res
;
4684 for (res
= p
->dns_request
->ar_result
; res
; res
= res
->ai_next
)
4685 addrinfos
= Fcons (conv_addrinfo_to_lisp (res
), addrinfos
);
4687 addrinfos
= Fnreverse (addrinfos
);
4689 /* The DNS lookup failed. */
4690 else if (connecting_status (p
->status
))
4692 deactivate_process (proc
);
4693 pset_status (p
, (list2
4695 concat3 (build_string ("Name lookup of "),
4696 build_string (p
->dns_request
->ar_name
),
4697 build_string (" failed")))));
4700 free_dns_request (proc
);
4702 /* This process should not already be connected (or killed). */
4703 if (! connecting_status (p
->status
))
4709 #endif /* HAVE_GETADDRINFO_A */
4712 wait_for_socket_fds (Lisp_Object process
, char const *name
)
4714 while (XPROCESS (process
)->infd
< 0
4715 && connecting_status (XPROCESS (process
)->status
))
4717 add_to_log ("Waiting for socket from %s...", build_string (name
));
4718 wait_reading_process_output (0, 20 * 1000 * 1000, 0, 0, Qnil
, NULL
, 0);
4723 wait_while_connecting (Lisp_Object process
)
4725 while (connecting_status (XPROCESS (process
)->status
))
4727 add_to_log ("Waiting for connection...");
4728 wait_reading_process_output (0, 20 * 1000 * 1000, 0, 0, Qnil
, NULL
, 0);
4733 wait_for_tls_negotiation (Lisp_Object process
)
4736 while (XPROCESS (process
)->gnutls_p
4737 && XPROCESS (process
)->gnutls_initstage
!= GNUTLS_STAGE_READY
)
4739 add_to_log ("Waiting for TLS...");
4740 wait_reading_process_output (0, 20 * 1000 * 1000, 0, 0, Qnil
, NULL
, 0);
4745 /* This variable is different from waiting_for_input in keyboard.c.
4746 It is used to communicate to a lisp process-filter/sentinel (via the
4747 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4748 for user-input when that process-filter was called.
4749 waiting_for_input cannot be used as that is by definition 0 when
4750 lisp code is being evalled.
4751 This is also used in record_asynch_buffer_change.
4752 For that purpose, this must be 0
4753 when not inside wait_reading_process_output. */
4754 static int waiting_for_user_input_p
;
4757 wait_reading_process_output_unwind (int data
)
4759 waiting_for_user_input_p
= data
;
4762 /* This is here so breakpoints can be put on it. */
4764 wait_reading_process_output_1 (void)
4768 /* Read and dispose of subprocess output while waiting for timeout to
4769 elapse and/or keyboard input to be available.
4773 If negative, gobble data immediately available but don't wait for any.
4776 an additional duration to wait, measured in nanoseconds
4777 If TIME_LIMIT is zero, then:
4778 If NSECS == 0, there is no limit.
4779 If NSECS > 0, the timeout consists of NSECS only.
4780 If NSECS < 0, gobble data immediately, as if TIME_LIMIT were negative.
4783 0 to ignore keyboard input, or
4784 1 to return when input is available, or
4785 -1 meaning caller will actually read the input, so don't throw to
4786 the quit handler, or
4788 DO_DISPLAY means redisplay should be done to show subprocess
4789 output that arrives.
4791 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4792 (and gobble terminal input into the buffer if any arrives).
4794 If WAIT_PROC is specified, wait until something arrives from that
4797 If JUST_WAIT_PROC is nonzero, handle only output from WAIT_PROC
4798 (suspending output from other processes). A negative value
4799 means don't run any timers either.
4801 Return positive if we received input from WAIT_PROC (or from any
4802 process if WAIT_PROC is null), zero if we attempted to receive
4803 input but got none, and negative if we didn't even try. */
4806 wait_reading_process_output (intmax_t time_limit
, int nsecs
, int read_kbd
,
4808 Lisp_Object wait_for_cell
,
4809 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
4819 struct timespec timeout
, end_time
, timer_delay
;
4820 struct timespec got_output_end_time
= invalid_timespec ();
4821 enum { MINIMUM
= -1, TIMEOUT
, INFINITY
} wait
;
4822 int got_some_output
= -1;
4823 #if defined HAVE_GETADDRINFO_A || defined HAVE_GNUTLS
4824 bool retry_for_async
;
4826 ptrdiff_t count
= SPECPDL_INDEX ();
4828 /* Close to the current time if known, an invalid timespec otherwise. */
4829 struct timespec now
= invalid_timespec ();
4831 FD_ZERO (&Available
);
4834 if (time_limit
== 0 && nsecs
== 0 && wait_proc
&& !NILP (Vinhibit_quit
)
4835 && !(CONSP (wait_proc
->status
)
4836 && EQ (XCAR (wait_proc
->status
), Qexit
)))
4837 message1 ("Blocking call to accept-process-output with quit inhibited!!");
4839 record_unwind_protect_int (wait_reading_process_output_unwind
,
4840 waiting_for_user_input_p
);
4841 waiting_for_user_input_p
= read_kbd
;
4843 if (TYPE_MAXIMUM (time_t) < time_limit
)
4844 time_limit
= TYPE_MAXIMUM (time_t);
4846 if (time_limit
< 0 || nsecs
< 0)
4848 else if (time_limit
> 0 || nsecs
> 0)
4851 now
= current_timespec ();
4852 end_time
= timespec_add (now
, make_timespec (time_limit
, nsecs
));
4859 bool process_skipped
= false;
4861 /* If calling from keyboard input, do not quit
4862 since we want to return C-g as an input character.
4863 Otherwise, do pending quit if requested. */
4866 else if (pending_signals
)
4867 process_pending_signals ();
4869 /* Exit now if the cell we're waiting for became non-nil. */
4870 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4873 #if defined HAVE_GETADDRINFO_A || defined HAVE_GNUTLS
4875 Lisp_Object process_list_head
, aproc
;
4876 struct Lisp_Process
*p
;
4878 retry_for_async
= false;
4879 FOR_EACH_PROCESS(process_list_head
, aproc
)
4881 p
= XPROCESS (aproc
);
4883 if (! wait_proc
|| p
== wait_proc
)
4885 #ifdef HAVE_GETADDRINFO_A
4886 /* Check for pending DNS requests. */
4889 Lisp_Object addrinfos
= check_for_dns (aproc
);
4890 if (!NILP (addrinfos
) && !EQ (addrinfos
, Qt
))
4891 connect_network_socket (aproc
, addrinfos
, Qnil
);
4893 retry_for_async
= true;
4897 /* Continue TLS negotiation. */
4898 if (p
->gnutls_initstage
== GNUTLS_STAGE_HANDSHAKE_TRIED
4899 && p
->is_non_blocking_client
)
4901 gnutls_try_handshake (p
);
4902 p
->gnutls_handshakes_tried
++;
4904 if (p
->gnutls_initstage
== GNUTLS_STAGE_READY
)
4906 gnutls_verify_boot (aproc
, Qnil
);
4907 finish_after_tls_connection (aproc
);
4911 retry_for_async
= true;
4912 if (p
->gnutls_handshakes_tried
4913 > GNUTLS_EMACS_HANDSHAKES_LIMIT
)
4915 deactivate_process (aproc
);
4916 pset_status (p
, list2 (Qfailed
,
4917 build_string ("TLS negotiation failed")));
4925 #endif /* GETADDRINFO_A or GNUTLS */
4927 /* Compute time from now till when time limit is up. */
4928 /* Exit if already run out. */
4929 if (wait
== TIMEOUT
)
4931 if (!timespec_valid_p (now
))
4932 now
= current_timespec ();
4933 if (timespec_cmp (end_time
, now
) <= 0)
4935 timeout
= timespec_sub (end_time
, now
);
4938 timeout
= make_timespec (wait
< TIMEOUT
? 0 : 100000, 0);
4940 /* Normally we run timers here.
4941 But not if wait_for_cell; in those cases,
4942 the wait is supposed to be short,
4943 and those callers cannot handle running arbitrary Lisp code here. */
4944 if (NILP (wait_for_cell
)
4945 && just_wait_proc
>= 0)
4949 unsigned old_timers_run
= timers_run
;
4950 struct buffer
*old_buffer
= current_buffer
;
4951 Lisp_Object old_window
= selected_window
;
4953 timer_delay
= timer_check ();
4955 /* If a timer has run, this might have changed buffers
4956 an alike. Make read_key_sequence aware of that. */
4957 if (timers_run
!= old_timers_run
4958 && (old_buffer
!= current_buffer
4959 || !EQ (old_window
, selected_window
))
4960 && waiting_for_user_input_p
== -1)
4961 record_asynch_buffer_change ();
4963 if (timers_run
!= old_timers_run
&& do_display
)
4964 /* We must retry, since a timer may have requeued itself
4965 and that could alter the time_delay. */
4966 redisplay_preserve_echo_area (9);
4970 while (!detect_input_pending ());
4972 /* If there is unread keyboard input, also return. */
4974 && requeued_events_pending_p ())
4977 /* This is so a breakpoint can be put here. */
4978 if (!timespec_valid_p (timer_delay
))
4979 wait_reading_process_output_1 ();
4982 /* Cause C-g and alarm signals to take immediate action,
4983 and cause input available signals to zero out timeout.
4985 It is important that we do this before checking for process
4986 activity. If we get a SIGCHLD after the explicit checks for
4987 process activity, timeout is the only way we will know. */
4989 set_waiting_for_input (&timeout
);
4991 /* If status of something has changed, and no input is
4992 available, notify the user of the change right away. After
4993 this explicit check, we'll let the SIGCHLD handler zap
4994 timeout to get our attention. */
4995 if (update_tick
!= process_tick
)
5000 if (kbd_on_hold_p ())
5003 Atemp
= input_wait_mask
;
5006 timeout
= make_timespec (0, 0);
5007 if ((pselect (max (max_process_desc
, max_input_desc
) + 1,
5009 (num_pending_connects
> 0 ? &Ctemp
: NULL
),
5010 NULL
, &timeout
, NULL
)
5013 /* It's okay for us to do this and then continue with
5014 the loop, since timeout has already been zeroed out. */
5015 clear_waiting_for_input ();
5016 got_some_output
= status_notify (NULL
, wait_proc
);
5017 if (do_display
) redisplay_preserve_echo_area (13);
5021 /* Don't wait for output from a non-running process. Just
5022 read whatever data has already been received. */
5023 if (wait_proc
&& wait_proc
->raw_status_new
)
5024 update_status (wait_proc
);
5026 && ! EQ (wait_proc
->status
, Qrun
)
5027 && ! connecting_status (wait_proc
->status
))
5029 bool read_some_bytes
= false;
5031 clear_waiting_for_input ();
5033 /* If data can be read from the process, do so until exhausted. */
5034 if (wait_proc
->infd
>= 0)
5036 XSETPROCESS (proc
, wait_proc
);
5040 int nread
= read_process_output (proc
, wait_proc
->infd
);
5043 if (errno
== EIO
|| would_block (errno
))
5048 if (got_some_output
< nread
)
5049 got_some_output
= nread
;
5052 read_some_bytes
= true;
5057 if (read_some_bytes
&& do_display
)
5058 redisplay_preserve_echo_area (10);
5063 /* Wait till there is something to do. */
5065 if (wait_proc
&& just_wait_proc
)
5067 if (wait_proc
->infd
< 0) /* Terminated. */
5069 FD_SET (wait_proc
->infd
, &Available
);
5073 else if (!NILP (wait_for_cell
))
5075 Available
= non_process_wait_mask
;
5082 Available
= non_keyboard_wait_mask
;
5084 Available
= input_wait_mask
;
5085 Writeok
= write_mask
;
5086 check_delay
= wait_proc
? 0 : process_output_delay_count
;
5090 /* If frame size has changed or the window is newly mapped,
5091 redisplay now, before we start to wait. There is a race
5092 condition here; if a SIGIO arrives between now and the select
5093 and indicates that a frame is trashed, the select may block
5094 displaying a trashed screen. */
5095 if (frame_garbaged
&& do_display
)
5097 clear_waiting_for_input ();
5098 redisplay_preserve_echo_area (11);
5100 set_waiting_for_input (&timeout
);
5103 /* Skip the `select' call if input is available and we're
5104 waiting for keyboard input or a cell change (which can be
5105 triggered by processing X events). In the latter case, set
5106 nfds to 1 to avoid breaking the loop. */
5108 if ((read_kbd
|| !NILP (wait_for_cell
))
5109 && detect_input_pending ())
5111 nfds
= read_kbd
? 0 : 1;
5113 FD_ZERO (&Available
);
5117 /* Set the timeout for adaptive read buffering if any
5118 process has non-zero read_output_skip and non-zero
5119 read_output_delay, and we are not reading output for a
5120 specific process. It is not executed if
5121 Vprocess_adaptive_read_buffering is nil. */
5122 if (process_output_skip
&& check_delay
> 0)
5124 int adaptive_nsecs
= timeout
.tv_nsec
;
5125 if (timeout
.tv_sec
> 0 || adaptive_nsecs
> READ_OUTPUT_DELAY_MAX
)
5126 adaptive_nsecs
= READ_OUTPUT_DELAY_MAX
;
5127 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
5129 proc
= chan_process
[channel
];
5132 /* Find minimum non-zero read_output_delay among the
5133 processes with non-zero read_output_skip. */
5134 if (XPROCESS (proc
)->read_output_delay
> 0)
5137 if (!XPROCESS (proc
)->read_output_skip
)
5139 FD_CLR (channel
, &Available
);
5140 process_skipped
= true;
5141 XPROCESS (proc
)->read_output_skip
= 0;
5142 if (XPROCESS (proc
)->read_output_delay
< adaptive_nsecs
)
5143 adaptive_nsecs
= XPROCESS (proc
)->read_output_delay
;
5146 timeout
= make_timespec (0, adaptive_nsecs
);
5147 process_output_skip
= 0;
5150 /* If we've got some output and haven't limited our timeout
5151 with adaptive read buffering, limit it. */
5152 if (got_some_output
> 0 && !process_skipped
5154 || timeout
.tv_nsec
> READ_OUTPUT_DELAY_INCREMENT
))
5155 timeout
= make_timespec (0, READ_OUTPUT_DELAY_INCREMENT
);
5158 if (NILP (wait_for_cell
) && just_wait_proc
>= 0
5159 && timespec_valid_p (timer_delay
)
5160 && timespec_cmp (timer_delay
, timeout
) < 0)
5162 if (!timespec_valid_p (now
))
5163 now
= current_timespec ();
5164 struct timespec timeout_abs
= timespec_add (now
, timeout
);
5165 if (!timespec_valid_p (got_output_end_time
)
5166 || timespec_cmp (timeout_abs
, got_output_end_time
) < 0)
5167 got_output_end_time
= timeout_abs
;
5168 timeout
= timer_delay
;
5171 got_output_end_time
= invalid_timespec ();
5173 /* NOW can become inaccurate if time can pass during pselect. */
5174 if (timeout
.tv_sec
> 0 || timeout
.tv_nsec
> 0)
5175 now
= invalid_timespec ();
5177 #if defined HAVE_GETADDRINFO_A || defined HAVE_GNUTLS
5179 && (timeout
.tv_sec
> 0 || timeout
.tv_nsec
> ASYNC_RETRY_NSEC
))
5182 timeout
.tv_nsec
= ASYNC_RETRY_NSEC
;
5186 #if defined (HAVE_NS)
5188 #elif defined (HAVE_GLIB)
5193 (max (max_process_desc
, max_input_desc
) + 1,
5195 (check_write
? &Writeok
: 0),
5196 NULL
, &timeout
, NULL
);
5199 /* GnuTLS buffers data internally. In lowat mode it leaves
5200 some data in the TCP buffers so that select works, but
5201 with custom pull/push functions we need to check if some
5202 data is available in the buffers manually. */
5205 fd_set tls_available
;
5208 FD_ZERO (&tls_available
);
5211 /* We're not waiting on a specific process, so loop
5212 through all the channels and check for data.
5213 This is a workaround needed for some versions of
5214 the gnutls library -- 2.12.14 has been confirmed
5216 http://comments.gmane.org/gmane.emacs.devel/145074 */
5217 for (channel
= 0; channel
< FD_SETSIZE
; ++channel
)
5218 if (! NILP (chan_process
[channel
]))
5220 struct Lisp_Process
*p
=
5221 XPROCESS (chan_process
[channel
]);
5222 if (p
&& p
->gnutls_p
&& p
->gnutls_state
5223 && ((emacs_gnutls_record_check_pending
5228 eassert (p
->infd
== channel
);
5229 FD_SET (p
->infd
, &tls_available
);
5236 /* Check this specific channel. */
5237 if (wait_proc
->gnutls_p
/* Check for valid process. */
5238 && wait_proc
->gnutls_state
5239 /* Do we have pending data? */
5240 && ((emacs_gnutls_record_check_pending
5241 (wait_proc
->gnutls_state
))
5245 eassert (0 <= wait_proc
->infd
);
5246 /* Set to Available. */
5247 FD_SET (wait_proc
->infd
, &tls_available
);
5252 Available
= tls_available
;
5259 /* Make C-g and alarm signals set flags again. */
5260 clear_waiting_for_input ();
5262 /* If we woke up due to SIGWINCH, actually change size now. */
5263 do_pending_window_change (0);
5267 /* Exit the main loop if we've passed the requested timeout,
5268 or aren't skipping processes and got some output and
5269 haven't lowered our timeout due to timers or SIGIO and
5270 have waited a long amount of time due to repeated
5272 struct timespec huge_timespec
5273 = make_timespec (TYPE_MAXIMUM (time_t), 2 * TIMESPEC_RESOLUTION
);
5274 struct timespec cmp_time
= huge_timespec
;
5277 if (wait
== TIMEOUT
)
5278 cmp_time
= end_time
;
5279 if (!process_skipped
&& got_some_output
> 0
5280 && (timeout
.tv_sec
> 0 || timeout
.tv_nsec
> 0))
5282 if (!timespec_valid_p (got_output_end_time
))
5284 if (timespec_cmp (got_output_end_time
, cmp_time
) < 0)
5285 cmp_time
= got_output_end_time
;
5287 if (timespec_cmp (cmp_time
, huge_timespec
) < 0)
5289 now
= current_timespec ();
5290 if (timespec_cmp (cmp_time
, now
) <= 0)
5297 if (xerrno
== EINTR
)
5299 else if (xerrno
== EBADF
)
5302 report_file_errno ("Failed select", Qnil
, xerrno
);
5305 /* Check for keyboard input. */
5306 /* If there is any, return immediately
5307 to give it higher priority than subprocesses. */
5311 unsigned old_timers_run
= timers_run
;
5312 struct buffer
*old_buffer
= current_buffer
;
5313 Lisp_Object old_window
= selected_window
;
5316 if (detect_input_pending_run_timers (do_display
))
5318 swallow_events (do_display
);
5319 if (detect_input_pending_run_timers (do_display
))
5323 /* If a timer has run, this might have changed buffers
5324 an alike. Make read_key_sequence aware of that. */
5325 if (timers_run
!= old_timers_run
5326 && waiting_for_user_input_p
== -1
5327 && (old_buffer
!= current_buffer
5328 || !EQ (old_window
, selected_window
)))
5329 record_asynch_buffer_change ();
5335 /* If there is unread keyboard input, also return. */
5337 && requeued_events_pending_p ())
5340 /* If we are not checking for keyboard input now,
5341 do process events (but don't run any timers).
5342 This is so that X events will be processed.
5343 Otherwise they may have to wait until polling takes place.
5344 That would causes delays in pasting selections, for example.
5346 (We used to do this only if wait_for_cell.) */
5347 if (read_kbd
== 0 && detect_input_pending ())
5349 swallow_events (do_display
);
5350 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
5351 if (detect_input_pending ())
5356 /* Exit now if the cell we're waiting for became non-nil. */
5357 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
5361 /* If we think we have keyboard input waiting, but didn't get SIGIO,
5362 go read it. This can happen with X on BSD after logging out.
5363 In that case, there really is no input and no SIGIO,
5364 but select says there is input. */
5366 if (read_kbd
&& interrupt_input
5367 && keyboard_bit_set (&Available
) && ! noninteractive
)
5368 handle_input_available_signal (SIGIO
);
5371 /* If checking input just got us a size-change event from X,
5372 obey it now if we should. */
5373 if (read_kbd
|| ! NILP (wait_for_cell
))
5374 do_pending_window_change (0);
5376 /* Check for data from a process. */
5377 if (no_avail
|| nfds
== 0)
5380 for (channel
= 0; channel
<= max_input_desc
; ++channel
)
5382 struct fd_callback_data
*d
= &fd_callback_info
[channel
];
5384 && ((d
->condition
& FOR_READ
5385 && FD_ISSET (channel
, &Available
))
5386 || (d
->condition
& FOR_WRITE
5387 && FD_ISSET (channel
, &write_mask
))))
5388 d
->func (channel
, d
->data
);
5391 for (channel
= 0; channel
<= max_process_desc
; channel
++)
5393 if (FD_ISSET (channel
, &Available
)
5394 && FD_ISSET (channel
, &non_keyboard_wait_mask
)
5395 && !FD_ISSET (channel
, &non_process_wait_mask
))
5399 /* If waiting for this channel, arrange to return as
5400 soon as no more input to be processed. No more
5402 proc
= chan_process
[channel
];
5406 /* If this is a server stream socket, accept connection. */
5407 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
5409 server_accept_connection (proc
, channel
);
5413 /* Read data from the process, starting with our
5414 buffered-ahead character if we have one. */
5416 nread
= read_process_output (proc
, channel
);
5417 if ((!wait_proc
|| wait_proc
== XPROCESS (proc
))
5418 && got_some_output
< nread
)
5419 got_some_output
= nread
;
5422 /* Vacuum up any leftovers without waiting. */
5423 if (wait_proc
== XPROCESS (proc
))
5425 /* Since read_process_output can run a filter,
5426 which can call accept-process-output,
5427 don't try to read from any other processes
5428 before doing the select again. */
5429 FD_ZERO (&Available
);
5432 redisplay_preserve_echo_area (12);
5434 else if (nread
== -1 && would_block (errno
))
5437 /* FIXME: Is this special case still needed? */
5438 /* Note that we cannot distinguish between no input
5439 available now and a closed pipe.
5440 With luck, a closed pipe will be accompanied by
5441 subprocess termination and SIGCHLD. */
5442 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
)
5443 && !PIPECONN_P (proc
))
5447 /* On some OSs with ptys, when the process on one end of
5448 a pty exits, the other end gets an error reading with
5449 errno = EIO instead of getting an EOF (0 bytes read).
5450 Therefore, if we get an error reading and errno =
5451 EIO, just continue, because the child process has
5452 exited and should clean itself up soon (e.g. when we
5454 else if (nread
== -1 && errno
== EIO
)
5456 struct Lisp_Process
*p
= XPROCESS (proc
);
5458 /* Clear the descriptor now, so we only raise the
5460 FD_CLR (channel
, &input_wait_mask
);
5461 FD_CLR (channel
, &non_keyboard_wait_mask
);
5465 /* If the EIO occurs on a pty, the SIGCHLD handler's
5466 waitpid call will not find the process object to
5467 delete. Do it here. */
5468 p
->tick
= ++process_tick
;
5469 pset_status (p
, Qfailed
);
5472 #endif /* HAVE_PTYS */
5473 /* If we can detect process termination, don't consider the
5474 process gone just because its pipe is closed. */
5475 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
)
5476 && !PIPECONN_P (proc
))
5478 else if (nread
== 0 && PIPECONN_P (proc
))
5480 /* Preserve status of processes already terminated. */
5481 XPROCESS (proc
)->tick
= ++process_tick
;
5482 deactivate_process (proc
);
5483 if (EQ (XPROCESS (proc
)->status
, Qrun
))
5484 pset_status (XPROCESS (proc
),
5485 list2 (Qexit
, make_number (0)));
5489 /* Preserve status of processes already terminated. */
5490 XPROCESS (proc
)->tick
= ++process_tick
;
5491 deactivate_process (proc
);
5492 if (XPROCESS (proc
)->raw_status_new
)
5493 update_status (XPROCESS (proc
));
5494 if (EQ (XPROCESS (proc
)->status
, Qrun
))
5495 pset_status (XPROCESS (proc
),
5496 list2 (Qexit
, make_number (256)));
5499 if (FD_ISSET (channel
, &Writeok
)
5500 && FD_ISSET (channel
, &connect_wait_mask
))
5502 struct Lisp_Process
*p
;
5504 FD_CLR (channel
, &connect_wait_mask
);
5505 FD_CLR (channel
, &write_mask
);
5506 if (--num_pending_connects
< 0)
5509 proc
= chan_process
[channel
];
5513 p
= XPROCESS (proc
);
5517 socklen_t xlen
= sizeof (xerrno
);
5518 if (getsockopt (channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
5522 /* On MS-Windows, getsockopt clears the error for the
5523 entire process, which may not be the right thing; see
5524 w32.c. Use getpeername instead. */
5526 struct sockaddr pname
;
5527 socklen_t pnamelen
= sizeof (pname
);
5529 /* If connection failed, getpeername will fail. */
5531 if (getpeername (channel
, &pname
, &pnamelen
) < 0)
5533 /* Obtain connect failure code through error slippage. */
5536 if (errno
== ENOTCONN
&& read (channel
, &dummy
, 1) < 0)
5543 Lisp_Object addrinfos
5544 = connecting_status (p
->status
) ? XCDR (p
->status
) : Qnil
;
5545 if (!NILP (addrinfos
))
5546 XSETCDR (p
->status
, XCDR (addrinfos
));
5549 p
->tick
= ++process_tick
;
5550 pset_status (p
, list2 (Qfailed
, make_number (xerrno
)));
5552 deactivate_process (proc
);
5553 if (!NILP (addrinfos
))
5554 connect_network_socket (proc
, addrinfos
, Qnil
);
5559 /* If we have an incompletely set up TLS connection,
5560 then defer the sentinel signaling until
5562 if (NILP (p
->gnutls_boot_parameters
)
5566 pset_status (p
, Qrun
);
5567 /* Execute the sentinel here. If we had relied on
5568 status_notify to do it later, it will read input
5569 from the process before calling the sentinel. */
5570 exec_sentinel (proc
, build_string ("open\n"));
5573 if (0 <= p
->infd
&& !EQ (p
->filter
, Qt
)
5574 && !EQ (p
->command
, Qt
))
5576 FD_SET (p
->infd
, &input_wait_mask
);
5577 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
5581 } /* End for each file descriptor. */
5582 } /* End while exit conditions not met. */
5584 unbind_to (count
, Qnil
);
5586 /* If calling from keyboard input, do not quit
5587 since we want to return C-g as an input character.
5588 Otherwise, do pending quit if requested. */
5591 /* Prevent input_pending from remaining set if we quit. */
5592 clear_input_pending ();
5596 return got_some_output
;
5599 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
5602 read_process_output_call (Lisp_Object fun_and_args
)
5604 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
5608 read_process_output_error_handler (Lisp_Object error_val
)
5610 cmd_error_internal (error_val
, "error in process filter: ");
5612 update_echo_area ();
5613 Fsleep_for (make_number (2), Qnil
);
5618 read_and_dispose_of_process_output (struct Lisp_Process
*p
, char *chars
,
5620 struct coding_system
*coding
);
5622 /* Read pending output from the process channel,
5623 starting with our buffered-ahead character if we have one.
5624 Yield number of decoded characters read.
5626 This function reads at most 4096 characters.
5627 If you want to read all available subprocess output,
5628 you must call it repeatedly until it returns zero.
5630 The characters read are decoded according to PROC's coding-system
5634 read_process_output (Lisp_Object proc
, int channel
)
5637 struct Lisp_Process
*p
= XPROCESS (proc
);
5638 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5639 int carryover
= p
->decoding_carryover
;
5640 enum { readmax
= 4096 };
5641 ptrdiff_t count
= SPECPDL_INDEX ();
5642 Lisp_Object odeactivate
;
5643 char chars
[sizeof coding
->carryover
+ readmax
];
5646 /* See the comment above. */
5647 memcpy (chars
, SDATA (p
->decoding_buf
), carryover
);
5649 #ifdef DATAGRAM_SOCKETS
5650 /* We have a working select, so proc_buffered_char is always -1. */
5651 if (DATAGRAM_CHAN_P (channel
))
5653 socklen_t len
= datagram_address
[channel
].len
;
5654 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5655 0, datagram_address
[channel
].sa
, &len
);
5660 bool buffered
= proc_buffered_char
[channel
] >= 0;
5663 chars
[carryover
] = proc_buffered_char
[channel
];
5664 proc_buffered_char
[channel
] = -1;
5667 if (p
->gnutls_p
&& p
->gnutls_state
)
5668 nbytes
= emacs_gnutls_read (p
, chars
+ carryover
+ buffered
,
5669 readmax
- buffered
);
5672 nbytes
= emacs_read (channel
, chars
+ carryover
+ buffered
,
5673 readmax
- buffered
);
5674 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5676 int delay
= p
->read_output_delay
;
5679 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5682 process_output_delay_count
++;
5683 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5686 else if (delay
> 0 && nbytes
== readmax
- buffered
)
5688 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5690 process_output_delay_count
--;
5692 p
->read_output_delay
= delay
;
5695 p
->read_output_skip
= 1;
5696 process_output_skip
= 1;
5700 nbytes
+= buffered
&& nbytes
<= 0;
5703 p
->decoding_carryover
= 0;
5705 /* At this point, NBYTES holds number of bytes just received
5706 (including the one in proc_buffered_char[channel]). */
5709 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5711 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5714 /* Now set NBYTES how many bytes we must decode. */
5715 nbytes
+= carryover
;
5717 odeactivate
= Vdeactivate_mark
;
5718 /* There's no good reason to let process filters change the current
5719 buffer, and many callers of accept-process-output, sit-for, and
5720 friends don't expect current-buffer to be changed from under them. */
5721 record_unwind_current_buffer ();
5723 read_and_dispose_of_process_output (p
, chars
, nbytes
, coding
);
5725 /* Handling the process output should not deactivate the mark. */
5726 Vdeactivate_mark
= odeactivate
;
5728 unbind_to (count
, Qnil
);
5733 read_and_dispose_of_process_output (struct Lisp_Process
*p
, char *chars
,
5735 struct coding_system
*coding
)
5737 Lisp_Object outstream
= p
->filter
;
5739 bool outer_running_asynch_code
= running_asynch_code
;
5740 int waiting
= waiting_for_user_input_p
;
5743 Lisp_Object obuffer
, okeymap
;
5744 XSETBUFFER (obuffer
, current_buffer
);
5745 okeymap
= BVAR (current_buffer
, keymap
);
5748 /* We inhibit quit here instead of just catching it so that
5749 hitting ^G when a filter happens to be running won't screw
5751 specbind (Qinhibit_quit
, Qt
);
5752 specbind (Qlast_nonmenu_event
, Qt
);
5754 /* In case we get recursively called,
5755 and we already saved the match data nonrecursively,
5756 save the same match data in safely recursive fashion. */
5757 if (outer_running_asynch_code
)
5760 /* Don't clobber the CURRENT match data, either! */
5761 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5762 restore_search_regs ();
5763 record_unwind_save_match_data ();
5764 Fset_match_data (tem
, Qt
);
5767 /* For speed, if a search happens within this code,
5768 save the match data in a special nonrecursive fashion. */
5769 running_asynch_code
= 1;
5771 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5772 text
= coding
->dst_object
;
5773 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5774 /* A new coding system might be found. */
5775 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5777 pset_decode_coding_system (p
, Vlast_coding_system_used
);
5779 /* Don't call setup_coding_system for
5780 proc_decode_coding_system[channel] here. It is done in
5781 detect_coding called via decode_coding above. */
5783 /* If a coding system for encoding is not yet decided, we set
5784 it as the same as coding-system for decoding.
5786 But, before doing that we must check if
5787 proc_encode_coding_system[p->outfd] surely points to a
5788 valid memory because p->outfd will be changed once EOF is
5789 sent to the process. */
5790 if (NILP (p
->encode_coding_system
) && p
->outfd
>= 0
5791 && proc_encode_coding_system
[p
->outfd
])
5793 pset_encode_coding_system
5794 (p
, coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
));
5795 setup_coding_system (p
->encode_coding_system
,
5796 proc_encode_coding_system
[p
->outfd
]);
5800 if (coding
->carryover_bytes
> 0)
5802 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5803 pset_decoding_buf (p
, make_uninit_string (coding
->carryover_bytes
));
5804 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5805 coding
->carryover_bytes
);
5806 p
->decoding_carryover
= coding
->carryover_bytes
;
5808 if (SBYTES (text
) > 0)
5809 /* FIXME: It's wrong to wrap or not based on debug-on-error, and
5810 sometimes it's simply wrong to wrap (e.g. when called from
5811 accept-process-output). */
5812 internal_condition_case_1 (read_process_output_call
,
5813 list3 (outstream
, make_lisp_proc (p
), text
),
5814 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5815 read_process_output_error_handler
);
5817 /* If we saved the match data nonrecursively, restore it now. */
5818 restore_search_regs ();
5819 running_asynch_code
= outer_running_asynch_code
;
5821 /* Restore waiting_for_user_input_p as it was
5822 when we were called, in case the filter clobbered it. */
5823 waiting_for_user_input_p
= waiting
;
5825 #if 0 /* Call record_asynch_buffer_change unconditionally,
5826 because we might have changed minor modes or other things
5827 that affect key bindings. */
5828 if (! EQ (Fcurrent_buffer (), obuffer
)
5829 || ! EQ (current_buffer
->keymap
, okeymap
))
5831 /* But do it only if the caller is actually going to read events.
5832 Otherwise there's no need to make him wake up, and it could
5833 cause trouble (for example it would make sit_for return). */
5834 if (waiting_for_user_input_p
== -1)
5835 record_asynch_buffer_change ();
5838 DEFUN ("internal-default-process-filter", Finternal_default_process_filter
,
5839 Sinternal_default_process_filter
, 2, 2, 0,
5840 doc
: /* Function used as default process filter.
5841 This inserts the process's output into its buffer, if there is one.
5842 Otherwise it discards the output. */)
5843 (Lisp_Object proc
, Lisp_Object text
)
5845 struct Lisp_Process
*p
;
5848 CHECK_PROCESS (proc
);
5849 p
= XPROCESS (proc
);
5850 CHECK_STRING (text
);
5852 if (!NILP (p
->buffer
) && BUFFER_LIVE_P (XBUFFER (p
->buffer
)))
5854 Lisp_Object old_read_only
;
5855 ptrdiff_t old_begv
, old_zv
;
5856 ptrdiff_t old_begv_byte
, old_zv_byte
;
5857 ptrdiff_t before
, before_byte
;
5858 ptrdiff_t opoint_byte
;
5861 Fset_buffer (p
->buffer
);
5863 opoint_byte
= PT_BYTE
;
5864 old_read_only
= BVAR (current_buffer
, read_only
);
5867 old_begv_byte
= BEGV_BYTE
;
5868 old_zv_byte
= ZV_BYTE
;
5870 bset_read_only (current_buffer
, Qnil
);
5872 /* Insert new output into buffer at the current end-of-output
5873 marker, thus preserving logical ordering of input and output. */
5874 if (XMARKER (p
->mark
)->buffer
)
5875 set_point_from_marker (p
->mark
);
5877 SET_PT_BOTH (ZV
, ZV_BYTE
);
5879 before_byte
= PT_BYTE
;
5881 /* If the output marker is outside of the visible region, save
5882 the restriction and widen. */
5883 if (! (BEGV
<= PT
&& PT
<= ZV
))
5886 /* Adjust the multibyteness of TEXT to that of the buffer. */
5887 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
5888 != ! STRING_MULTIBYTE (text
))
5889 text
= (STRING_MULTIBYTE (text
)
5890 ? Fstring_as_unibyte (text
)
5891 : Fstring_to_multibyte (text
));
5892 /* Insert before markers in case we are inserting where
5893 the buffer's mark is, and the user's next command is Meta-y. */
5894 insert_from_string_before_markers (text
, 0, 0,
5895 SCHARS (text
), SBYTES (text
), 0);
5897 /* Make sure the process marker's position is valid when the
5898 process buffer is changed in the signal_after_change above.
5899 W3 is known to do that. */
5900 if (BUFFERP (p
->buffer
)
5901 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5902 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5904 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5906 update_mode_lines
= 23;
5908 /* Make sure opoint and the old restrictions
5909 float ahead of any new text just as point would. */
5910 if (opoint
>= before
)
5912 opoint
+= PT
- before
;
5913 opoint_byte
+= PT_BYTE
- before_byte
;
5915 if (old_begv
> before
)
5917 old_begv
+= PT
- before
;
5918 old_begv_byte
+= PT_BYTE
- before_byte
;
5920 if (old_zv
>= before
)
5922 old_zv
+= PT
- before
;
5923 old_zv_byte
+= PT_BYTE
- before_byte
;
5926 /* If the restriction isn't what it should be, set it. */
5927 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5928 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5930 bset_read_only (current_buffer
, old_read_only
);
5931 SET_PT_BOTH (opoint
, opoint_byte
);
5936 /* Sending data to subprocess. */
5938 /* In send_process, when a write fails temporarily,
5939 wait_reading_process_output is called. It may execute user code,
5940 e.g. timers, that attempts to write new data to the same process.
5941 We must ensure that data is sent in the right order, and not
5942 interspersed half-completed with other writes (Bug#10815). This is
5943 handled by the write_queue element of struct process. It is a list
5944 with each entry having the form
5946 (string . (offset . length))
5948 where STRING is a lisp string, OFFSET is the offset into the
5949 string's byte sequence from which we should begin to send, and
5950 LENGTH is the number of bytes left to send. */
5952 /* Create a new entry in write_queue.
5953 INPUT_OBJ should be a buffer, string Qt, or Qnil.
5954 BUF is a pointer to the string sequence of the input_obj or a C
5955 string in case of Qt or Qnil. */
5958 write_queue_push (struct Lisp_Process
*p
, Lisp_Object input_obj
,
5959 const char *buf
, ptrdiff_t len
, bool front
)
5962 Lisp_Object entry
, obj
;
5964 if (STRINGP (input_obj
))
5966 offset
= buf
- SSDATA (input_obj
);
5972 obj
= make_unibyte_string (buf
, len
);
5975 entry
= Fcons (obj
, Fcons (make_number (offset
), make_number (len
)));
5978 pset_write_queue (p
, Fcons (entry
, p
->write_queue
));
5980 pset_write_queue (p
, nconc2 (p
->write_queue
, list1 (entry
)));
5983 /* Remove the first element in the write_queue of process P, put its
5984 contents in OBJ, BUF and LEN, and return true. If the
5985 write_queue is empty, return false. */
5988 write_queue_pop (struct Lisp_Process
*p
, Lisp_Object
*obj
,
5989 const char **buf
, ptrdiff_t *len
)
5991 Lisp_Object entry
, offset_length
;
5994 if (NILP (p
->write_queue
))
5997 entry
= XCAR (p
->write_queue
);
5998 pset_write_queue (p
, XCDR (p
->write_queue
));
6000 *obj
= XCAR (entry
);
6001 offset_length
= XCDR (entry
);
6003 *len
= XINT (XCDR (offset_length
));
6004 offset
= XINT (XCAR (offset_length
));
6005 *buf
= SSDATA (*obj
) + offset
;
6010 /* Send some data to process PROC.
6011 BUF is the beginning of the data; LEN is the number of characters.
6012 OBJECT is the Lisp object that the data comes from. If OBJECT is
6013 nil or t, it means that the data comes from C string.
6015 If OBJECT is not nil, the data is encoded by PROC's coding-system
6016 for encoding before it is sent.
6018 This function can evaluate Lisp code and can garbage collect. */
6021 send_process (Lisp_Object proc
, const char *buf
, ptrdiff_t len
,
6024 struct Lisp_Process
*p
= XPROCESS (proc
);
6026 struct coding_system
*coding
;
6028 if (NETCONN_P (proc
))
6030 wait_while_connecting (proc
);
6031 wait_for_tls_negotiation (proc
);
6034 if (p
->raw_status_new
)
6036 if (! EQ (p
->status
, Qrun
))
6037 error ("Process %s not running", SDATA (p
->name
));
6039 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
6041 coding
= proc_encode_coding_system
[p
->outfd
];
6042 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
6044 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
6045 || (BUFFERP (object
)
6046 && !NILP (BVAR (XBUFFER (object
), enable_multibyte_characters
)))
6049 pset_encode_coding_system
6050 (p
, complement_process_encoding_system (p
->encode_coding_system
));
6051 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
6053 /* The coding system for encoding was changed to raw-text
6054 because we sent a unibyte text previously. Now we are
6055 sending a multibyte text, thus we must encode it by the
6056 original coding system specified for the current process.
6058 Another reason we come here is that the coding system
6059 was just complemented and a new one was returned by
6060 complement_process_encoding_system. */
6061 setup_coding_system (p
->encode_coding_system
, coding
);
6062 Vlast_coding_system_used
= p
->encode_coding_system
;
6064 coding
->src_multibyte
= 1;
6068 coding
->src_multibyte
= 0;
6069 /* For sending a unibyte text, character code conversion should
6070 not take place but EOL conversion should. So, setup raw-text
6071 or one of the subsidiary if we have not yet done it. */
6072 if (CODING_REQUIRE_ENCODING (coding
))
6074 if (CODING_REQUIRE_FLUSHING (coding
))
6076 /* But, before changing the coding, we must flush out data. */
6077 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6078 send_process (proc
, "", 0, Qt
);
6079 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
6081 setup_coding_system (raw_text_coding_system
6082 (Vlast_coding_system_used
),
6084 coding
->src_multibyte
= 0;
6087 coding
->dst_multibyte
= 0;
6089 if (CODING_REQUIRE_ENCODING (coding
))
6091 coding
->dst_object
= Qt
;
6092 if (BUFFERP (object
))
6094 ptrdiff_t from_byte
, from
, to
;
6095 ptrdiff_t save_pt
, save_pt_byte
;
6096 struct buffer
*cur
= current_buffer
;
6098 set_buffer_internal (XBUFFER (object
));
6099 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
6101 from_byte
= PTR_BYTE_POS ((unsigned char *) buf
);
6102 from
= BYTE_TO_CHAR (from_byte
);
6103 to
= BYTE_TO_CHAR (from_byte
+ len
);
6104 TEMP_SET_PT_BOTH (from
, from_byte
);
6105 encode_coding_object (coding
, object
, from
, from_byte
,
6106 to
, from_byte
+ len
, Qt
);
6107 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
6108 set_buffer_internal (cur
);
6110 else if (STRINGP (object
))
6112 encode_coding_object (coding
, object
, 0, 0, SCHARS (object
),
6113 SBYTES (object
), Qt
);
6117 coding
->dst_object
= make_unibyte_string (buf
, len
);
6118 coding
->produced
= len
;
6121 len
= coding
->produced
;
6122 object
= coding
->dst_object
;
6123 buf
= SSDATA (object
);
6126 /* If there is already data in the write_queue, put the new data
6127 in the back of queue. Otherwise, ignore it. */
6128 if (!NILP (p
->write_queue
))
6129 write_queue_push (p
, object
, buf
, len
, 0);
6131 do /* while !NILP (p->write_queue) */
6133 ptrdiff_t cur_len
= -1;
6134 const char *cur_buf
;
6135 Lisp_Object cur_object
;
6137 /* If write_queue is empty, ignore it. */
6138 if (!write_queue_pop (p
, &cur_object
, &cur_buf
, &cur_len
))
6142 cur_object
= object
;
6147 /* Send this batch, using one or more write calls. */
6148 ptrdiff_t written
= 0;
6149 int outfd
= p
->outfd
;
6150 #ifdef DATAGRAM_SOCKETS
6151 if (DATAGRAM_CHAN_P (outfd
))
6153 rv
= sendto (outfd
, cur_buf
, cur_len
,
6154 0, datagram_address
[outfd
].sa
,
6155 datagram_address
[outfd
].len
);
6158 else if (errno
== EMSGSIZE
)
6159 report_file_error ("Sending datagram", proc
);
6165 if (p
->gnutls_p
&& p
->gnutls_state
)
6166 written
= emacs_gnutls_write (p
, cur_buf
, cur_len
);
6169 written
= emacs_write_sig (outfd
, cur_buf
, cur_len
);
6170 rv
= (written
? 0 : -1);
6171 if (p
->read_output_delay
> 0
6172 && p
->adaptive_read_buffering
== 1)
6174 p
->read_output_delay
= 0;
6175 process_output_delay_count
--;
6176 p
->read_output_skip
= 0;
6182 if (would_block (errno
))
6183 /* Buffer is full. Wait, accepting input;
6184 that may allow the program
6185 to finish doing output and read more. */
6187 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
6188 /* A gross hack to work around a bug in FreeBSD.
6189 In the following sequence, read(2) returns
6193 write(2) 954 bytes, get EAGAIN
6194 read(2) 1024 bytes in process_read_output
6195 read(2) 11 bytes in process_read_output
6197 That is, read(2) returns more bytes than have
6198 ever been written successfully. The 1033 bytes
6199 read are the 1022 bytes written successfully
6200 after processing (for example with CRs added if
6201 the terminal is set up that way which it is
6202 here). The same bytes will be seen again in a
6203 later read(2), without the CRs. */
6205 if (errno
== EAGAIN
)
6208 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
6210 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
6212 /* Put what we should have written in wait_queue. */
6213 write_queue_push (p
, cur_object
, cur_buf
, cur_len
, 1);
6214 wait_reading_process_output (0, 20 * 1000 * 1000,
6215 0, 0, Qnil
, NULL
, 0);
6216 /* Reread queue, to see what is left. */
6219 else if (errno
== EPIPE
)
6221 p
->raw_status_new
= 0;
6222 pset_status (p
, list2 (Qexit
, make_number (256)));
6223 p
->tick
= ++process_tick
;
6224 deactivate_process (proc
);
6225 error ("process %s no longer connected to pipe; closed it",
6229 /* This is a real error. */
6230 report_file_error ("Writing to process", proc
);
6236 while (!NILP (p
->write_queue
));
6239 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
6241 doc
: /* Send current contents of region as input to PROCESS.
6242 PROCESS may be a process, a buffer, the name of a process or buffer, or
6243 nil, indicating the current buffer's process.
6244 Called from program, takes three arguments, PROCESS, START and END.
6245 If the region is more than 500 characters long,
6246 it is sent in several bunches. This may happen even for shorter regions.
6247 Output from processes can arrive in between bunches.
6249 If PROCESS is a non-blocking network process that hasn't been fully
6250 set up yet, this function will block until socket setup has completed. */)
6251 (Lisp_Object process
, Lisp_Object start
, Lisp_Object end
)
6253 Lisp_Object proc
= get_process (process
);
6254 ptrdiff_t start_byte
, end_byte
;
6256 validate_region (&start
, &end
);
6258 start_byte
= CHAR_TO_BYTE (XINT (start
));
6259 end_byte
= CHAR_TO_BYTE (XINT (end
));
6261 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
6262 move_gap_both (XINT (start
), start_byte
);
6264 if (NETCONN_P (proc
))
6265 wait_while_connecting (proc
);
6267 send_process (proc
, (char *) BYTE_POS_ADDR (start_byte
),
6268 end_byte
- start_byte
, Fcurrent_buffer ());
6273 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
6275 doc
: /* Send PROCESS the contents of STRING as input.
6276 PROCESS may be a process, a buffer, the name of a process or buffer, or
6277 nil, indicating the current buffer's process.
6278 If STRING is more than 500 characters long,
6279 it is sent in several bunches. This may happen even for shorter strings.
6280 Output from processes can arrive in between bunches.
6282 If PROCESS is a non-blocking network process that hasn't been fully
6283 set up yet, this function will block until socket setup has completed. */)
6284 (Lisp_Object process
, Lisp_Object string
)
6286 CHECK_STRING (string
);
6287 Lisp_Object proc
= get_process (process
);
6288 send_process (proc
, SSDATA (string
),
6289 SBYTES (string
), string
);
6293 /* Return the foreground process group for the tty/pty that
6294 the process P uses. */
6296 emacs_get_tty_pgrp (struct Lisp_Process
*p
)
6301 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
6304 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
6305 master side. Try the slave side. */
6306 fd
= emacs_open (SSDATA (p
->tty_name
), O_RDONLY
, 0);
6310 ioctl (fd
, TIOCGPGRP
, &gid
);
6314 #endif /* defined (TIOCGPGRP ) */
6319 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
6320 Sprocess_running_child_p
, 0, 1, 0,
6321 doc
: /* Return non-nil if PROCESS has given the terminal to a
6322 child. If the operating system does not make it possible to find out,
6323 return t. If we can find out, return the numeric ID of the foreground
6325 (Lisp_Object process
)
6327 /* Initialize in case ioctl doesn't exist or gives an error,
6328 in a way that will cause returning t. */
6329 Lisp_Object proc
= get_process (process
);
6330 struct Lisp_Process
*p
= XPROCESS (proc
);
6332 if (!EQ (p
->type
, Qreal
))
6333 error ("Process %s is not a subprocess",
6336 error ("Process %s is not active",
6339 pid_t gid
= emacs_get_tty_pgrp (p
);
6344 return make_number (gid
);
6348 /* Send a signal number SIGNO to PROCESS.
6349 If CURRENT_GROUP is t, that means send to the process group
6350 that currently owns the terminal being used to communicate with PROCESS.
6351 This is used for various commands in shell mode.
6352 If CURRENT_GROUP is lambda, that means send to the process group
6353 that currently owns the terminal, but only if it is NOT the shell itself.
6355 If NOMSG is false, insert signal-announcements into process's buffers
6358 If we can, we try to signal PROCESS by sending control characters
6359 down the pty. This allows us to signal inferiors who have changed
6360 their uid, for which kill would return an EPERM error. */
6363 process_send_signal (Lisp_Object process
, int signo
, Lisp_Object current_group
,
6367 struct Lisp_Process
*p
;
6371 proc
= get_process (process
);
6372 p
= XPROCESS (proc
);
6374 if (!EQ (p
->type
, Qreal
))
6375 error ("Process %s is not a subprocess",
6378 error ("Process %s is not active",
6382 current_group
= Qnil
;
6384 /* If we are using pgrps, get a pgrp number and make it negative. */
6385 if (NILP (current_group
))
6386 /* Send the signal to the shell's process group. */
6390 #ifdef SIGNALS_VIA_CHARACTERS
6391 /* If possible, send signals to the entire pgrp
6392 by sending an input character to it. */
6395 cc_t
*sig_char
= NULL
;
6397 tcgetattr (p
->infd
, &t
);
6402 sig_char
= &t
.c_cc
[VINTR
];
6406 sig_char
= &t
.c_cc
[VQUIT
];
6411 sig_char
= &t
.c_cc
[VSWTCH
];
6413 sig_char
= &t
.c_cc
[VSUSP
];
6418 if (sig_char
&& *sig_char
!= CDISABLE
)
6420 send_process (proc
, (char *) sig_char
, 1, Qnil
);
6423 /* If we can't send the signal with a character,
6424 fall through and send it another way. */
6426 /* The code above may fall through if it can't
6427 handle the signal. */
6428 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
6431 /* Get the current pgrp using the tty itself, if we have that.
6432 Otherwise, use the pty to get the pgrp.
6433 On pfa systems, saka@pfu.fujitsu.co.JP writes:
6434 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
6435 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
6436 His patch indicates that if TIOCGPGRP returns an error, then
6437 we should just assume that p->pid is also the process group id. */
6439 gid
= emacs_get_tty_pgrp (p
);
6442 /* If we can't get the information, assume
6443 the shell owns the tty. */
6446 /* It is not clear whether anything really can set GID to -1.
6447 Perhaps on some system one of those ioctls can or could do so.
6448 Or perhaps this is vestigial. */
6451 #else /* ! defined (TIOCGPGRP) */
6452 /* Can't select pgrps on this system, so we know that
6453 the child itself heads the pgrp. */
6455 #endif /* ! defined (TIOCGPGRP) */
6457 /* If current_group is lambda, and the shell owns the terminal,
6458 don't send any signal. */
6459 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
6464 if (signo
== SIGCONT
)
6466 p
->raw_status_new
= 0;
6467 pset_status (p
, Qrun
);
6468 p
->tick
= ++process_tick
;
6471 status_notify (NULL
, NULL
);
6472 redisplay_preserve_echo_area (13);
6478 /* Work around a HP-UX 7.0 bug that mishandles signals to subjobs.
6479 We don't know whether the bug is fixed in later HP-UX versions. */
6480 if (! NILP (current_group
) && ioctl (p
->infd
, TIOCSIGSEND
, signo
) != -1)
6484 /* If we don't have process groups, send the signal to the immediate
6485 subprocess. That isn't really right, but it's better than any
6486 obvious alternative. */
6487 pid_t pid
= no_pgrp
? gid
: - gid
;
6489 /* Do not kill an already-reaped process, as that could kill an
6490 innocent bystander that happens to have the same process ID. */
6492 block_child_signal (&oldset
);
6495 unblock_child_signal (&oldset
);
6498 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
6499 doc
: /* Interrupt process PROCESS.
6500 PROCESS may be a process, a buffer, or the name of a process or buffer.
6501 No arg or nil means current buffer's process.
6502 Second arg CURRENT-GROUP non-nil means send signal to
6503 the current process-group of the process's controlling terminal
6504 rather than to the process's own process group.
6505 If the process is a shell, this means interrupt current subjob
6506 rather than the shell.
6508 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
6509 don't send the signal. */)
6510 (Lisp_Object process
, Lisp_Object current_group
)
6512 process_send_signal (process
, SIGINT
, current_group
, 0);
6516 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
6517 doc
: /* Kill process PROCESS. May be process or name of one.
6518 See function `interrupt-process' for more details on usage. */)
6519 (Lisp_Object process
, Lisp_Object current_group
)
6521 process_send_signal (process
, SIGKILL
, current_group
, 0);
6525 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
6526 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
6527 See function `interrupt-process' for more details on usage. */)
6528 (Lisp_Object process
, Lisp_Object current_group
)
6530 process_send_signal (process
, SIGQUIT
, current_group
, 0);
6534 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
6535 doc
: /* Stop process PROCESS. May be process or name of one.
6536 See function `interrupt-process' for more details on usage.
6537 If PROCESS is a network or serial process, inhibit handling of incoming
6539 (Lisp_Object process
, Lisp_Object current_group
)
6541 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)
6542 || PIPECONN_P (process
)))
6544 struct Lisp_Process
*p
;
6546 p
= XPROCESS (process
);
6547 if (NILP (p
->command
)
6550 FD_CLR (p
->infd
, &input_wait_mask
);
6551 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6553 pset_command (p
, Qt
);
6557 error ("No SIGTSTP support");
6559 process_send_signal (process
, SIGTSTP
, current_group
, 0);
6564 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
6565 doc
: /* Continue process PROCESS. May be process or name of one.
6566 See function `interrupt-process' for more details on usage.
6567 If PROCESS is a network or serial process, resume handling of incoming
6569 (Lisp_Object process
, Lisp_Object current_group
)
6571 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)
6572 || PIPECONN_P (process
)))
6574 struct Lisp_Process
*p
;
6576 p
= XPROCESS (process
);
6577 if (EQ (p
->command
, Qt
)
6579 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
6581 FD_SET (p
->infd
, &input_wait_mask
);
6582 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
6584 if (fd_info
[ p
->infd
].flags
& FILE_SERIAL
)
6585 PurgeComm (fd_info
[ p
->infd
].hnd
, PURGE_RXABORT
| PURGE_RXCLEAR
);
6586 #else /* not WINDOWSNT */
6587 tcflush (p
->infd
, TCIFLUSH
);
6588 #endif /* not WINDOWSNT */
6590 pset_command (p
, Qnil
);
6594 process_send_signal (process
, SIGCONT
, current_group
, 0);
6596 error ("No SIGCONT support");
6601 /* Return the integer value of the signal whose abbreviation is ABBR,
6602 or a negative number if there is no such signal. */
6604 abbr_to_signal (char const *name
)
6607 char sigbuf
[20]; /* Large enough for all valid signal abbreviations. */
6609 if (!strncmp (name
, "SIG", 3) || !strncmp (name
, "sig", 3))
6612 for (i
= 0; i
< sizeof sigbuf
; i
++)
6614 sigbuf
[i
] = c_toupper (name
[i
]);
6616 return str2sig (sigbuf
, &signo
) == 0 ? signo
: -1;
6622 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
6623 2, 2, "sProcess (name or number): \nnSignal code: ",
6624 doc
: /* Send PROCESS the signal with code SIGCODE.
6625 PROCESS may also be a number specifying the process id of the
6626 process to signal; in this case, the process need not be a child of
6628 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
6629 (Lisp_Object process
, Lisp_Object sigcode
)
6634 if (STRINGP (process
))
6636 Lisp_Object tem
= Fget_process (process
);
6639 Lisp_Object process_number
6640 = string_to_number (SSDATA (process
), 10, 1);
6641 if (NUMBERP (process_number
))
6642 tem
= process_number
;
6646 else if (!NUMBERP (process
))
6647 process
= get_process (process
);
6652 if (NUMBERP (process
))
6653 CONS_TO_INTEGER (process
, pid_t
, pid
);
6656 CHECK_PROCESS (process
);
6657 pid
= XPROCESS (process
)->pid
;
6659 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6662 if (INTEGERP (sigcode
))
6664 CHECK_TYPE_RANGED_INTEGER (int, sigcode
);
6665 signo
= XINT (sigcode
);
6671 CHECK_SYMBOL (sigcode
);
6672 name
= SSDATA (SYMBOL_NAME (sigcode
));
6674 signo
= abbr_to_signal (name
);
6676 error ("Undefined signal name %s", name
);
6679 return make_number (kill (pid
, signo
));
6682 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6683 doc
: /* Make PROCESS see end-of-file in its input.
6684 EOF comes after any text already sent to it.
6685 PROCESS may be a process, a buffer, the name of a process or buffer, or
6686 nil, indicating the current buffer's process.
6687 If PROCESS is a network connection, or is a process communicating
6688 through a pipe (as opposed to a pty), then you cannot send any more
6689 text to PROCESS after you call this function.
6690 If PROCESS is a serial process, wait until all output written to the
6691 process has been transmitted to the serial port. */)
6692 (Lisp_Object process
)
6695 struct coding_system
*coding
= NULL
;
6698 proc
= get_process (process
);
6700 if (NETCONN_P (proc
))
6701 wait_while_connecting (proc
);
6703 if (DATAGRAM_CONN_P (proc
))
6707 outfd
= XPROCESS (proc
)->outfd
;
6709 coding
= proc_encode_coding_system
[outfd
];
6711 /* Make sure the process is really alive. */
6712 if (XPROCESS (proc
)->raw_status_new
)
6713 update_status (XPROCESS (proc
));
6714 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6715 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6717 if (coding
&& CODING_REQUIRE_FLUSHING (coding
))
6719 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6720 send_process (proc
, "", 0, Qnil
);
6723 if (XPROCESS (proc
)->pty_flag
)
6724 send_process (proc
, "\004", 1, Qnil
);
6725 else if (EQ (XPROCESS (proc
)->type
, Qserial
))
6728 if (tcdrain (XPROCESS (proc
)->outfd
) != 0)
6729 report_file_error ("Failed tcdrain", Qnil
);
6730 #endif /* not WINDOWSNT */
6731 /* Do nothing on Windows because writes are blocking. */
6735 struct Lisp_Process
*p
= XPROCESS (proc
);
6736 int old_outfd
= p
->outfd
;
6739 #ifdef HAVE_SHUTDOWN
6740 /* If this is a network connection, or socketpair is used
6741 for communication with the subprocess, call shutdown to cause EOF.
6742 (In some old system, shutdown to socketpair doesn't work.
6743 Then we just can't win.) */
6745 && (EQ (p
->type
, Qnetwork
) || p
->infd
== old_outfd
))
6746 shutdown (old_outfd
, 1);
6748 close_process_fd (&p
->open_fd
[WRITE_TO_SUBPROCESS
]);
6749 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6751 report_file_error ("Opening null device", Qnil
);
6752 p
->open_fd
[WRITE_TO_SUBPROCESS
] = new_outfd
;
6753 p
->outfd
= new_outfd
;
6755 if (!proc_encode_coding_system
[new_outfd
])
6756 proc_encode_coding_system
[new_outfd
]
6757 = xmalloc (sizeof (struct coding_system
));
6760 *proc_encode_coding_system
[new_outfd
]
6761 = *proc_encode_coding_system
[old_outfd
];
6762 memset (proc_encode_coding_system
[old_outfd
], 0,
6763 sizeof (struct coding_system
));
6766 setup_coding_system (p
->encode_coding_system
,
6767 proc_encode_coding_system
[new_outfd
]);
6772 /* The main Emacs thread records child processes in three places:
6774 - Vprocess_alist, for asynchronous subprocesses, which are child
6775 processes visible to Lisp.
6777 - deleted_pid_list, for child processes invisible to Lisp,
6778 typically because of delete-process. These are recorded so that
6779 the processes can be reaped when they exit, so that the operating
6780 system's process table is not cluttered by zombies.
6782 - the local variable PID in Fcall_process, call_process_cleanup and
6783 call_process_kill, for synchronous subprocesses.
6784 record_unwind_protect is used to make sure this process is not
6785 forgotten: if the user interrupts call-process and the child
6786 process refuses to exit immediately even with two C-g's,
6787 call_process_kill adds PID's contents to deleted_pid_list before
6790 The main Emacs thread invokes waitpid only on child processes that
6791 it creates and that have not been reaped. This avoid races on
6792 platforms such as GTK, where other threads create their own
6793 subprocesses which the main thread should not reap. For example,
6794 if the main thread attempted to reap an already-reaped child, it
6795 might inadvertently reap a GTK-created process that happened to
6796 have the same process ID. */
6798 /* LIB_CHILD_HANDLER is a SIGCHLD handler that Emacs calls while doing
6799 its own SIGCHLD handling. On POSIXish systems, glib needs this to
6800 keep track of its own children. GNUstep is similar. */
6802 static void dummy_handler (int sig
) {}
6803 static signal_handler_t
volatile lib_child_handler
;
6805 /* Handle a SIGCHLD signal by looking for known child processes of
6806 Emacs whose status have changed. For each one found, record its
6809 All we do is change the status; we do not run sentinels or print
6810 notifications. That is saved for the next time keyboard input is
6811 done, in order to avoid timing errors.
6813 ** WARNING: this can be called during garbage collection.
6814 Therefore, it must not be fooled by the presence of mark bits in
6817 ** USG WARNING: Although it is not obvious from the documentation
6818 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6819 signal() before executing at least one wait(), otherwise the
6820 handler will be called again, resulting in an infinite loop. The
6821 relevant portion of the documentation reads "SIGCLD signals will be
6822 queued and the signal-catching function will be continually
6823 reentered until the queue is empty". Invoking signal() causes the
6824 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6827 ** Malloc WARNING: This should never call malloc either directly or
6828 indirectly; if it does, that is a bug. */
6831 handle_child_signal (int sig
)
6833 Lisp_Object tail
, proc
;
6835 /* Find the process that signaled us, and record its status. */
6837 /* The process can have been deleted by Fdelete_process, or have
6838 been started asynchronously by Fcall_process. */
6839 for (tail
= deleted_pid_list
; CONSP (tail
); tail
= XCDR (tail
))
6841 bool all_pids_are_fixnums
6842 = (MOST_NEGATIVE_FIXNUM
<= TYPE_MINIMUM (pid_t
)
6843 && TYPE_MAXIMUM (pid_t
) <= MOST_POSITIVE_FIXNUM
);
6844 Lisp_Object head
= XCAR (tail
);
6849 if (all_pids_are_fixnums
? INTEGERP (xpid
) : NUMBERP (xpid
))
6852 if (INTEGERP (xpid
))
6853 deleted_pid
= XINT (xpid
);
6855 deleted_pid
= XFLOAT_DATA (xpid
);
6856 if (child_status_changed (deleted_pid
, 0, 0))
6858 if (STRINGP (XCDR (head
)))
6859 unlink (SSDATA (XCDR (head
)));
6860 XSETCAR (tail
, Qnil
);
6865 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6866 FOR_EACH_PROCESS (tail
, proc
)
6868 struct Lisp_Process
*p
= XPROCESS (proc
);
6872 && child_status_changed (p
->pid
, &status
, WUNTRACED
| WCONTINUED
))
6874 /* Change the status of the process that was found. */
6875 p
->tick
= ++process_tick
;
6876 p
->raw_status
= status
;
6877 p
->raw_status_new
= 1;
6879 /* If process has terminated, stop waiting for its output. */
6880 if (WIFSIGNALED (status
) || WIFEXITED (status
))
6882 bool clear_desc_flag
= 0;
6885 clear_desc_flag
= 1;
6887 /* clear_desc_flag avoids a compiler bug in Microsoft C. */
6888 if (clear_desc_flag
)
6890 FD_CLR (p
->infd
, &input_wait_mask
);
6891 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6897 lib_child_handler (sig
);
6898 #ifdef NS_IMPL_GNUSTEP
6899 /* NSTask in GNUstep sets its child handler each time it is called.
6900 So we must re-set ours. */
6901 catch_child_signal ();
6906 deliver_child_signal (int sig
)
6908 deliver_process_signal (sig
, handle_child_signal
);
6913 exec_sentinel_error_handler (Lisp_Object error_val
)
6915 cmd_error_internal (error_val
, "error in process sentinel: ");
6917 update_echo_area ();
6918 Fsleep_for (make_number (2), Qnil
);
6923 exec_sentinel (Lisp_Object proc
, Lisp_Object reason
)
6925 Lisp_Object sentinel
, odeactivate
;
6926 struct Lisp_Process
*p
= XPROCESS (proc
);
6927 ptrdiff_t count
= SPECPDL_INDEX ();
6928 bool outer_running_asynch_code
= running_asynch_code
;
6929 int waiting
= waiting_for_user_input_p
;
6931 if (inhibit_sentinels
)
6934 odeactivate
= Vdeactivate_mark
;
6936 Lisp_Object obuffer
, okeymap
;
6937 XSETBUFFER (obuffer
, current_buffer
);
6938 okeymap
= BVAR (current_buffer
, keymap
);
6941 /* There's no good reason to let sentinels change the current
6942 buffer, and many callers of accept-process-output, sit-for, and
6943 friends don't expect current-buffer to be changed from under them. */
6944 record_unwind_current_buffer ();
6946 sentinel
= p
->sentinel
;
6948 /* Inhibit quit so that random quits don't screw up a running filter. */
6949 specbind (Qinhibit_quit
, Qt
);
6950 specbind (Qlast_nonmenu_event
, Qt
); /* Why? --Stef */
6952 /* In case we get recursively called,
6953 and we already saved the match data nonrecursively,
6954 save the same match data in safely recursive fashion. */
6955 if (outer_running_asynch_code
)
6958 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6959 restore_search_regs ();
6960 record_unwind_save_match_data ();
6961 Fset_match_data (tem
, Qt
);
6964 /* For speed, if a search happens within this code,
6965 save the match data in a special nonrecursive fashion. */
6966 running_asynch_code
= 1;
6968 internal_condition_case_1 (read_process_output_call
,
6969 list3 (sentinel
, proc
, reason
),
6970 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6971 exec_sentinel_error_handler
);
6973 /* If we saved the match data nonrecursively, restore it now. */
6974 restore_search_regs ();
6975 running_asynch_code
= outer_running_asynch_code
;
6977 Vdeactivate_mark
= odeactivate
;
6979 /* Restore waiting_for_user_input_p as it was
6980 when we were called, in case the filter clobbered it. */
6981 waiting_for_user_input_p
= waiting
;
6984 if (! EQ (Fcurrent_buffer (), obuffer
)
6985 || ! EQ (current_buffer
->keymap
, okeymap
))
6987 /* But do it only if the caller is actually going to read events.
6988 Otherwise there's no need to make him wake up, and it could
6989 cause trouble (for example it would make sit_for return). */
6990 if (waiting_for_user_input_p
== -1)
6991 record_asynch_buffer_change ();
6993 unbind_to (count
, Qnil
);
6996 /* Report all recent events of a change in process status
6997 (either run the sentinel or output a message).
6998 This is usually done while Emacs is waiting for keyboard input
6999 but can be done at other times.
7001 Return positive if any input was received from WAIT_PROC (or from
7002 any process if WAIT_PROC is null), zero if input was attempted but
7003 none received, and negative if we didn't even try. */
7006 status_notify (struct Lisp_Process
*deleting_process
,
7007 struct Lisp_Process
*wait_proc
)
7010 Lisp_Object tail
, msg
;
7011 int got_some_output
= -1;
7016 /* Set this now, so that if new processes are created by sentinels
7017 that we run, we get called again to handle their status changes. */
7018 update_tick
= process_tick
;
7020 FOR_EACH_PROCESS (tail
, proc
)
7023 register struct Lisp_Process
*p
= XPROCESS (proc
);
7025 if (p
->tick
!= p
->update_tick
)
7027 p
->update_tick
= p
->tick
;
7029 /* If process is still active, read any output that remains. */
7030 while (! EQ (p
->filter
, Qt
)
7031 && ! connecting_status (p
->status
)
7032 && ! EQ (p
->status
, Qlisten
)
7033 /* Network or serial process not stopped: */
7034 && ! EQ (p
->command
, Qt
)
7036 && p
!= deleting_process
)
7038 int nread
= read_process_output (proc
, p
->infd
);
7039 if ((!wait_proc
|| wait_proc
== XPROCESS (proc
))
7040 && got_some_output
< nread
)
7041 got_some_output
= nread
;
7046 /* Get the text to use for the message. */
7047 if (p
->raw_status_new
)
7049 msg
= status_message (p
);
7051 /* If process is terminated, deactivate it or delete it. */
7053 if (CONSP (p
->status
))
7054 symbol
= XCAR (p
->status
);
7056 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
7057 || EQ (symbol
, Qclosed
))
7059 if (delete_exited_processes
)
7060 remove_process (proc
);
7062 deactivate_process (proc
);
7065 /* The actions above may have further incremented p->tick.
7066 So set p->update_tick again so that an error in the sentinel will
7067 not cause this code to be run again. */
7068 p
->update_tick
= p
->tick
;
7069 /* Now output the message suitably. */
7070 exec_sentinel (proc
, msg
);
7071 if (BUFFERP (p
->buffer
))
7072 /* In case it uses %s in mode-line-format. */
7073 bset_update_mode_line (XBUFFER (p
->buffer
));
7077 return got_some_output
;
7080 DEFUN ("internal-default-process-sentinel", Finternal_default_process_sentinel
,
7081 Sinternal_default_process_sentinel
, 2, 2, 0,
7082 doc
: /* Function used as default sentinel for processes.
7083 This inserts a status message into the process's buffer, if there is one. */)
7084 (Lisp_Object proc
, Lisp_Object msg
)
7086 Lisp_Object buffer
, symbol
;
7087 struct Lisp_Process
*p
;
7088 CHECK_PROCESS (proc
);
7089 p
= XPROCESS (proc
);
7093 symbol
= XCAR (symbol
);
7095 if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
7098 struct buffer
*old
= current_buffer
;
7099 ptrdiff_t opoint
, opoint_byte
;
7100 ptrdiff_t before
, before_byte
;
7102 /* Avoid error if buffer is deleted
7103 (probably that's why the process is dead, too). */
7104 if (!BUFFER_LIVE_P (XBUFFER (buffer
)))
7106 Fset_buffer (buffer
);
7108 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
7109 msg
= (code_convert_string_norecord
7110 (msg
, Vlocale_coding_system
, 1));
7113 opoint_byte
= PT_BYTE
;
7114 /* Insert new output into buffer
7115 at the current end-of-output marker,
7116 thus preserving logical ordering of input and output. */
7117 if (XMARKER (p
->mark
)->buffer
)
7118 Fgoto_char (p
->mark
);
7120 SET_PT_BOTH (ZV
, ZV_BYTE
);
7123 before_byte
= PT_BYTE
;
7125 tem
= BVAR (current_buffer
, read_only
);
7126 bset_read_only (current_buffer
, Qnil
);
7127 insert_string ("\nProcess ");
7128 { /* FIXME: temporary kludge. */
7129 Lisp_Object tem2
= p
->name
; Finsert (1, &tem2
); }
7130 insert_string (" ");
7132 bset_read_only (current_buffer
, tem
);
7133 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
7135 if (opoint
>= before
)
7136 SET_PT_BOTH (opoint
+ (PT
- before
),
7137 opoint_byte
+ (PT_BYTE
- before_byte
));
7139 SET_PT_BOTH (opoint
, opoint_byte
);
7141 set_buffer_internal (old
);
7147 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
7148 Sset_process_coding_system
, 1, 3, 0,
7149 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
7150 DECODING will be used to decode subprocess output and ENCODING to
7151 encode subprocess input. */)
7152 (Lisp_Object process
, Lisp_Object decoding
, Lisp_Object encoding
)
7154 CHECK_PROCESS (process
);
7156 struct Lisp_Process
*p
= XPROCESS (process
);
7158 Fcheck_coding_system (decoding
);
7159 Fcheck_coding_system (encoding
);
7160 encoding
= coding_inherit_eol_type (encoding
, Qnil
);
7161 pset_decode_coding_system (p
, decoding
);
7162 pset_encode_coding_system (p
, encoding
);
7164 /* If the sockets haven't been set up yet, the final setup part of
7165 this will be called asynchronously. */
7166 if (p
->infd
< 0 || p
->outfd
< 0)
7169 setup_process_coding_systems (process
);
7174 DEFUN ("process-coding-system",
7175 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
7176 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
7177 (register Lisp_Object process
)
7179 CHECK_PROCESS (process
);
7180 return Fcons (XPROCESS (process
)->decode_coding_system
,
7181 XPROCESS (process
)->encode_coding_system
);
7184 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
7185 Sset_process_filter_multibyte
, 2, 2, 0,
7186 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
7187 If FLAG is non-nil, the filter is given multibyte strings.
7188 If FLAG is nil, the filter is given unibyte strings. In this case,
7189 all character code conversion except for end-of-line conversion is
7191 (Lisp_Object process
, Lisp_Object flag
)
7193 CHECK_PROCESS (process
);
7195 struct Lisp_Process
*p
= XPROCESS (process
);
7197 pset_decode_coding_system
7198 (p
, raw_text_coding_system (p
->decode_coding_system
));
7200 /* If the sockets haven't been set up yet, the final setup part of
7201 this will be called asynchronously. */
7202 if (p
->infd
< 0 || p
->outfd
< 0)
7205 setup_process_coding_systems (process
);
7210 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
7211 Sprocess_filter_multibyte_p
, 1, 1, 0,
7212 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
7213 (Lisp_Object process
)
7215 CHECK_PROCESS (process
);
7216 struct Lisp_Process
*p
= XPROCESS (process
);
7219 struct coding_system
*coding
= proc_decode_coding_system
[p
->infd
];
7220 return (CODING_FOR_UNIBYTE (coding
) ? Qnil
: Qt
);
7229 add_gpm_wait_descriptor (int desc
)
7231 add_keyboard_wait_descriptor (desc
);
7235 delete_gpm_wait_descriptor (int desc
)
7237 delete_keyboard_wait_descriptor (desc
);
7242 # ifdef USABLE_SIGIO
7244 /* Return true if *MASK has a bit set
7245 that corresponds to one of the keyboard input descriptors. */
7248 keyboard_bit_set (fd_set
*mask
)
7252 for (fd
= 0; fd
<= max_input_desc
; fd
++)
7253 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
7254 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
7261 #else /* not subprocesses */
7263 /* Defined in msdos.c. */
7264 extern int sys_select (int, fd_set
*, fd_set
*, fd_set
*,
7265 struct timespec
*, void *);
7267 /* Implementation of wait_reading_process_output, assuming that there
7268 are no subprocesses. Used only by the MS-DOS build.
7270 Wait for timeout to elapse and/or keyboard input to be available.
7274 If negative, gobble data immediately available but don't wait for any.
7277 an additional duration to wait, measured in nanoseconds
7278 If TIME_LIMIT is zero, then:
7279 If NSECS == 0, there is no limit.
7280 If NSECS > 0, the timeout consists of NSECS only.
7281 If NSECS < 0, gobble data immediately, as if TIME_LIMIT were negative.
7284 0 to ignore keyboard input, or
7285 1 to return when input is available, or
7286 -1 means caller will actually read the input, so don't throw to
7289 see full version for other parameters. We know that wait_proc will
7290 always be NULL, since `subprocesses' isn't defined.
7292 DO_DISPLAY means redisplay should be done to show subprocess
7293 output that arrives.
7295 Return -1 signifying we got no output and did not try. */
7298 wait_reading_process_output (intmax_t time_limit
, int nsecs
, int read_kbd
,
7300 Lisp_Object wait_for_cell
,
7301 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
7304 struct timespec end_time
, timeout
;
7305 enum { MINIMUM
= -1, TIMEOUT
, INFINITY
} wait
;
7307 if (TYPE_MAXIMUM (time_t) < time_limit
)
7308 time_limit
= TYPE_MAXIMUM (time_t);
7310 if (time_limit
< 0 || nsecs
< 0)
7312 else if (time_limit
> 0 || nsecs
> 0)
7315 end_time
= timespec_add (current_timespec (),
7316 make_timespec (time_limit
, nsecs
));
7321 /* Turn off periodic alarms (in case they are in use)
7322 and then turn off any other atimers,
7323 because the select emulator uses alarms. */
7325 turn_on_atimers (0);
7329 bool timeout_reduced_for_timers
= false;
7330 fd_set waitchannels
;
7333 /* If calling from keyboard input, do not quit
7334 since we want to return C-g as an input character.
7335 Otherwise, do pending quit if requested. */
7339 /* Exit now if the cell we're waiting for became non-nil. */
7340 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7343 /* Compute time from now till when time limit is up. */
7344 /* Exit if already run out. */
7345 if (wait
== TIMEOUT
)
7347 struct timespec now
= current_timespec ();
7348 if (timespec_cmp (end_time
, now
) <= 0)
7350 timeout
= timespec_sub (end_time
, now
);
7353 timeout
= make_timespec (wait
< TIMEOUT
? 0 : 100000, 0);
7355 /* If our caller will not immediately handle keyboard events,
7356 run timer events directly.
7357 (Callers that will immediately read keyboard events
7358 call timer_delay on their own.) */
7359 if (NILP (wait_for_cell
))
7361 struct timespec timer_delay
;
7365 unsigned old_timers_run
= timers_run
;
7366 timer_delay
= timer_check ();
7367 if (timers_run
!= old_timers_run
&& do_display
)
7368 /* We must retry, since a timer may have requeued itself
7369 and that could alter the time delay. */
7370 redisplay_preserve_echo_area (14);
7374 while (!detect_input_pending ());
7376 /* If there is unread keyboard input, also return. */
7378 && requeued_events_pending_p ())
7381 if (timespec_valid_p (timer_delay
))
7383 if (timespec_cmp (timer_delay
, timeout
) < 0)
7385 timeout
= timer_delay
;
7386 timeout_reduced_for_timers
= true;
7391 /* Cause C-g and alarm signals to take immediate action,
7392 and cause input available signals to zero out timeout. */
7394 set_waiting_for_input (&timeout
);
7396 /* If a frame has been newly mapped and needs updating,
7397 reprocess its display stuff. */
7398 if (frame_garbaged
&& do_display
)
7400 clear_waiting_for_input ();
7401 redisplay_preserve_echo_area (15);
7403 set_waiting_for_input (&timeout
);
7406 /* Wait till there is something to do. */
7407 FD_ZERO (&waitchannels
);
7408 if (read_kbd
&& detect_input_pending ())
7412 if (read_kbd
|| !NILP (wait_for_cell
))
7413 FD_SET (0, &waitchannels
);
7414 nfds
= pselect (1, &waitchannels
, NULL
, NULL
, &timeout
, NULL
);
7419 /* Make C-g and alarm signals set flags again. */
7420 clear_waiting_for_input ();
7422 /* If we woke up due to SIGWINCH, actually change size now. */
7423 do_pending_window_change (0);
7425 if (wait
< INFINITY
&& nfds
== 0 && ! timeout_reduced_for_timers
)
7426 /* We waited the full specified time, so return now. */
7431 /* If the system call was interrupted, then go around the
7433 if (xerrno
== EINTR
)
7434 FD_ZERO (&waitchannels
);
7436 report_file_errno ("Failed select", Qnil
, xerrno
);
7439 /* Check for keyboard input. */
7442 && detect_input_pending_run_timers (do_display
))
7444 swallow_events (do_display
);
7445 if (detect_input_pending_run_timers (do_display
))
7449 /* If there is unread keyboard input, also return. */
7451 && requeued_events_pending_p ())
7454 /* If wait_for_cell. check for keyboard input
7455 but don't run any timers.
7456 ??? (It seems wrong to me to check for keyboard
7457 input at all when wait_for_cell, but the code
7458 has been this way since July 1994.
7459 Try changing this after version 19.31.) */
7460 if (! NILP (wait_for_cell
)
7461 && detect_input_pending ())
7463 swallow_events (do_display
);
7464 if (detect_input_pending ())
7468 /* Exit now if the cell we're waiting for became non-nil. */
7469 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7478 #endif /* not subprocesses */
7480 /* The following functions are needed even if async subprocesses are
7481 not supported. Some of them are no-op stubs in that case. */
7485 /* Add FD, which is a descriptor returned by timerfd_create,
7486 to the set of non-keyboard input descriptors. */
7489 add_timer_wait_descriptor (int fd
)
7491 FD_SET (fd
, &input_wait_mask
);
7492 FD_SET (fd
, &non_keyboard_wait_mask
);
7493 FD_SET (fd
, &non_process_wait_mask
);
7494 fd_callback_info
[fd
].func
= timerfd_callback
;
7495 fd_callback_info
[fd
].data
= NULL
;
7496 fd_callback_info
[fd
].condition
|= FOR_READ
;
7497 if (fd
> max_input_desc
)
7498 max_input_desc
= fd
;
7501 #endif /* HAVE_TIMERFD */
7503 /* If program file NAME starts with /: for quoting a magic
7504 name, remove that, preserving the multibyteness of NAME. */
7507 remove_slash_colon (Lisp_Object name
)
7510 ((SBYTES (name
) > 2 && SREF (name
, 0) == '/' && SREF (name
, 1) == ':')
7511 ? make_specified_string (SSDATA (name
) + 2, SCHARS (name
) - 2,
7512 SBYTES (name
) - 2, STRING_MULTIBYTE (name
))
7516 /* Add DESC to the set of keyboard input descriptors. */
7519 add_keyboard_wait_descriptor (int desc
)
7521 #ifdef subprocesses /* Actually means "not MSDOS". */
7522 FD_SET (desc
, &input_wait_mask
);
7523 FD_SET (desc
, &non_process_wait_mask
);
7524 if (desc
> max_input_desc
)
7525 max_input_desc
= desc
;
7529 /* From now on, do not expect DESC to give keyboard input. */
7532 delete_keyboard_wait_descriptor (int desc
)
7535 FD_CLR (desc
, &input_wait_mask
);
7536 FD_CLR (desc
, &non_process_wait_mask
);
7537 delete_input_desc (desc
);
7541 /* Setup coding systems of PROCESS. */
7544 setup_process_coding_systems (Lisp_Object process
)
7547 struct Lisp_Process
*p
= XPROCESS (process
);
7549 int outch
= p
->outfd
;
7550 Lisp_Object coding_system
;
7552 if (inch
< 0 || outch
< 0)
7555 if (!proc_decode_coding_system
[inch
])
7556 proc_decode_coding_system
[inch
] = xmalloc (sizeof (struct coding_system
));
7557 coding_system
= p
->decode_coding_system
;
7558 if (EQ (p
->filter
, Qinternal_default_process_filter
)
7559 && BUFFERP (p
->buffer
))
7561 if (NILP (BVAR (XBUFFER (p
->buffer
), enable_multibyte_characters
)))
7562 coding_system
= raw_text_coding_system (coding_system
);
7564 setup_coding_system (coding_system
, proc_decode_coding_system
[inch
]);
7566 if (!proc_encode_coding_system
[outch
])
7567 proc_encode_coding_system
[outch
] = xmalloc (sizeof (struct coding_system
));
7568 setup_coding_system (p
->encode_coding_system
,
7569 proc_encode_coding_system
[outch
]);
7573 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7574 doc
: /* Return the (or a) live process associated with BUFFER.
7575 BUFFER may be a buffer or the name of one.
7576 Return nil if all processes associated with BUFFER have been
7577 deleted or killed. */)
7578 (register Lisp_Object buffer
)
7581 register Lisp_Object buf
, tail
, proc
;
7583 if (NILP (buffer
)) return Qnil
;
7584 buf
= Fget_buffer (buffer
);
7585 if (NILP (buf
)) return Qnil
;
7587 FOR_EACH_PROCESS (tail
, proc
)
7588 if (EQ (XPROCESS (proc
)->buffer
, buf
))
7590 #endif /* subprocesses */
7594 DEFUN ("process-inherit-coding-system-flag",
7595 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7597 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
7598 If this flag is t, `buffer-file-coding-system' of the buffer
7599 associated with PROCESS will inherit the coding system used to decode
7600 the process output. */)
7601 (register Lisp_Object process
)
7604 CHECK_PROCESS (process
);
7605 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
7607 /* Ignore the argument and return the value of
7608 inherit-process-coding-system. */
7609 return inherit_process_coding_system
? Qt
: Qnil
;
7613 /* Kill all processes associated with `buffer'.
7614 If `buffer' is nil, kill all processes. */
7617 kill_buffer_processes (Lisp_Object buffer
)
7620 Lisp_Object tail
, proc
;
7622 FOR_EACH_PROCESS (tail
, proc
)
7623 if (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
))
7625 if (NETCONN_P (proc
) || SERIALCONN_P (proc
) || PIPECONN_P (proc
))
7626 Fdelete_process (proc
);
7627 else if (XPROCESS (proc
)->infd
>= 0)
7628 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
7630 #else /* subprocesses */
7631 /* Since we have no subprocesses, this does nothing. */
7632 #endif /* subprocesses */
7635 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
,
7636 Swaiting_for_user_input_p
, 0, 0, 0,
7637 doc
: /* Return non-nil if Emacs is waiting for input from the user.
7638 This is intended for use by asynchronous process output filters and sentinels. */)
7642 return (waiting_for_user_input_p
? Qt
: Qnil
);
7648 /* Stop reading input from keyboard sources. */
7651 hold_keyboard_input (void)
7656 /* Resume reading input from keyboard sources. */
7659 unhold_keyboard_input (void)
7664 /* Return true if keyboard input is on hold, zero otherwise. */
7667 kbd_on_hold_p (void)
7669 return kbd_is_on_hold
;
7673 /* Enumeration of and access to system processes a-la ps(1). */
7675 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
7677 doc
: /* Return a list of numerical process IDs of all running processes.
7678 If this functionality is unsupported, return nil.
7680 See `process-attributes' for getting attributes of a process given its ID. */)
7683 return list_system_processes ();
7686 DEFUN ("process-attributes", Fprocess_attributes
,
7687 Sprocess_attributes
, 1, 1, 0,
7688 doc
: /* Return attributes of the process given by its PID, a number.
7690 Value is an alist where each element is a cons cell of the form
7694 If this functionality is unsupported, the value is nil.
7696 See `list-system-processes' for getting a list of all process IDs.
7698 The KEYs of the attributes that this function may return are listed
7699 below, together with the type of the associated VALUE (in parentheses).
7700 Not all platforms support all of these attributes; unsupported
7701 attributes will not appear in the returned alist.
7702 Unless explicitly indicated otherwise, numbers can have either
7703 integer or floating point values.
7705 euid -- Effective user User ID of the process (number)
7706 user -- User name corresponding to euid (string)
7707 egid -- Effective user Group ID of the process (number)
7708 group -- Group name corresponding to egid (string)
7709 comm -- Command name (executable name only) (string)
7710 state -- Process state code, such as "S", "R", or "T" (string)
7711 ppid -- Parent process ID (number)
7712 pgrp -- Process group ID (number)
7713 sess -- Session ID, i.e. process ID of session leader (number)
7714 ttname -- Controlling tty name (string)
7715 tpgid -- ID of foreground process group on the process's tty (number)
7716 minflt -- number of minor page faults (number)
7717 majflt -- number of major page faults (number)
7718 cminflt -- cumulative number of minor page faults (number)
7719 cmajflt -- cumulative number of major page faults (number)
7720 utime -- user time used by the process, in (current-time) format,
7721 which is a list of integers (HIGH LOW USEC PSEC)
7722 stime -- system time used by the process (current-time)
7723 time -- sum of utime and stime (current-time)
7724 cutime -- user time used by the process and its children (current-time)
7725 cstime -- system time used by the process and its children (current-time)
7726 ctime -- sum of cutime and cstime (current-time)
7727 pri -- priority of the process (number)
7728 nice -- nice value of the process (number)
7729 thcount -- process thread count (number)
7730 start -- time the process started (current-time)
7731 vsize -- virtual memory size of the process in KB's (number)
7732 rss -- resident set size of the process in KB's (number)
7733 etime -- elapsed time the process is running, in (HIGH LOW USEC PSEC) format
7734 pcpu -- percents of CPU time used by the process (floating-point number)
7735 pmem -- percents of total physical memory used by process's resident set
7736 (floating-point number)
7737 args -- command line which invoked the process (string). */)
7740 return system_process_attributes (pid
);
7744 /* Arrange to catch SIGCHLD if this hasn't already been arranged.
7745 Invoke this after init_process_emacs, and after glib and/or GNUstep
7746 futz with the SIGCHLD handler, but before Emacs forks any children.
7747 This function's caller should block SIGCHLD. */
7750 catch_child_signal (void)
7752 struct sigaction action
, old_action
;
7754 emacs_sigaction_init (&action
, deliver_child_signal
);
7755 block_child_signal (&oldset
);
7756 sigaction (SIGCHLD
, &action
, &old_action
);
7757 eassert (old_action
.sa_handler
== SIG_DFL
|| old_action
.sa_handler
== SIG_IGN
7758 || ! (old_action
.sa_flags
& SA_SIGINFO
));
7760 if (old_action
.sa_handler
!= deliver_child_signal
)
7762 = (old_action
.sa_handler
== SIG_DFL
|| old_action
.sa_handler
== SIG_IGN
7764 : old_action
.sa_handler
);
7765 unblock_child_signal (&oldset
);
7767 #endif /* subprocesses */
7770 /* This is not called "init_process" because that is the name of a
7771 Mach system call, so it would cause problems on Darwin systems. */
7773 init_process_emacs (int sockfd
)
7778 inhibit_sentinels
= 0;
7781 if (! noninteractive
|| initialized
)
7784 #if defined HAVE_GLIB && !defined WINDOWSNT
7785 /* Tickle glib's child-handling code. Ask glib to wait for Emacs itself;
7786 this should always fail, but is enough to initialize glib's
7787 private SIGCHLD handler, allowing catch_child_signal to copy
7788 it into lib_child_handler. */
7789 g_source_unref (g_child_watch_source_new (getpid ()));
7791 catch_child_signal ();
7794 FD_ZERO (&input_wait_mask
);
7795 FD_ZERO (&non_keyboard_wait_mask
);
7796 FD_ZERO (&non_process_wait_mask
);
7797 FD_ZERO (&write_mask
);
7798 max_process_desc
= max_input_desc
= -1;
7799 external_sock_fd
= sockfd
;
7800 memset (fd_callback_info
, 0, sizeof (fd_callback_info
));
7802 FD_ZERO (&connect_wait_mask
);
7803 num_pending_connects
= 0;
7805 process_output_delay_count
= 0;
7806 process_output_skip
= 0;
7808 /* Don't do this, it caused infinite select loops. The display
7809 method should call add_keyboard_wait_descriptor on stdin if it
7812 FD_SET (0, &input_wait_mask
);
7815 Vprocess_alist
= Qnil
;
7816 deleted_pid_list
= Qnil
;
7817 for (i
= 0; i
< FD_SETSIZE
; i
++)
7819 chan_process
[i
] = Qnil
;
7820 proc_buffered_char
[i
] = -1;
7822 memset (proc_decode_coding_system
, 0, sizeof proc_decode_coding_system
);
7823 memset (proc_encode_coding_system
, 0, sizeof proc_encode_coding_system
);
7824 #ifdef DATAGRAM_SOCKETS
7825 memset (datagram_address
, 0, sizeof datagram_address
);
7828 #if defined (DARWIN_OS)
7829 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7830 processes. As such, we only change the default value. */
7833 char const *release
= (STRINGP (Voperating_system_release
)
7834 ? SSDATA (Voperating_system_release
)
7836 if (!release
|| !release
[0] || (release
[0] < '7' && release
[1] == '.')) {
7837 Vprocess_connection_type
= Qnil
;
7841 #endif /* subprocesses */
7846 syms_of_process (void)
7850 DEFSYM (Qprocessp
, "processp");
7851 DEFSYM (Qrun
, "run");
7852 DEFSYM (Qstop
, "stop");
7853 DEFSYM (Qsignal
, "signal");
7855 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7858 DEFSYM (Qopen
, "open");
7859 DEFSYM (Qclosed
, "closed");
7860 DEFSYM (Qconnect
, "connect");
7861 DEFSYM (Qfailed
, "failed");
7862 DEFSYM (Qlisten
, "listen");
7863 DEFSYM (Qlocal
, "local");
7864 DEFSYM (Qipv4
, "ipv4");
7866 DEFSYM (Qipv6
, "ipv6");
7868 DEFSYM (Qdatagram
, "datagram");
7869 DEFSYM (Qseqpacket
, "seqpacket");
7871 DEFSYM (QCport
, ":port");
7872 DEFSYM (QCspeed
, ":speed");
7873 DEFSYM (QCprocess
, ":process");
7875 DEFSYM (QCbytesize
, ":bytesize");
7876 DEFSYM (QCstopbits
, ":stopbits");
7877 DEFSYM (QCparity
, ":parity");
7878 DEFSYM (Qodd
, "odd");
7879 DEFSYM (Qeven
, "even");
7880 DEFSYM (QCflowcontrol
, ":flowcontrol");
7883 DEFSYM (QCsummary
, ":summary");
7885 DEFSYM (Qreal
, "real");
7886 DEFSYM (Qnetwork
, "network");
7887 DEFSYM (Qserial
, "serial");
7888 DEFSYM (Qpipe
, "pipe");
7889 DEFSYM (QCbuffer
, ":buffer");
7890 DEFSYM (QChost
, ":host");
7891 DEFSYM (QCservice
, ":service");
7892 DEFSYM (QClocal
, ":local");
7893 DEFSYM (QCremote
, ":remote");
7894 DEFSYM (QCcoding
, ":coding");
7895 DEFSYM (QCserver
, ":server");
7896 DEFSYM (QCnowait
, ":nowait");
7897 DEFSYM (QCsentinel
, ":sentinel");
7898 DEFSYM (QCuse_external_socket
, ":use-external-socket");
7899 DEFSYM (QCtls_parameters
, ":tls-parameters");
7900 DEFSYM (Qnsm_verify_connection
, "nsm-verify-connection");
7901 DEFSYM (QClog
, ":log");
7902 DEFSYM (QCnoquery
, ":noquery");
7903 DEFSYM (QCstop
, ":stop");
7904 DEFSYM (QCplist
, ":plist");
7905 DEFSYM (QCcommand
, ":command");
7906 DEFSYM (QCconnection_type
, ":connection-type");
7907 DEFSYM (QCstderr
, ":stderr");
7908 DEFSYM (Qpty
, "pty");
7909 DEFSYM (Qpipe
, "pipe");
7911 DEFSYM (Qlast_nonmenu_event
, "last-nonmenu-event");
7913 staticpro (&Vprocess_alist
);
7914 staticpro (&deleted_pid_list
);
7916 #endif /* subprocesses */
7918 DEFSYM (QCname
, ":name");
7919 DEFSYM (QCtype
, ":type");
7921 DEFSYM (Qeuid
, "euid");
7922 DEFSYM (Qegid
, "egid");
7923 DEFSYM (Quser
, "user");
7924 DEFSYM (Qgroup
, "group");
7925 DEFSYM (Qcomm
, "comm");
7926 DEFSYM (Qstate
, "state");
7927 DEFSYM (Qppid
, "ppid");
7928 DEFSYM (Qpgrp
, "pgrp");
7929 DEFSYM (Qsess
, "sess");
7930 DEFSYM (Qttname
, "ttname");
7931 DEFSYM (Qtpgid
, "tpgid");
7932 DEFSYM (Qminflt
, "minflt");
7933 DEFSYM (Qmajflt
, "majflt");
7934 DEFSYM (Qcminflt
, "cminflt");
7935 DEFSYM (Qcmajflt
, "cmajflt");
7936 DEFSYM (Qutime
, "utime");
7937 DEFSYM (Qstime
, "stime");
7938 DEFSYM (Qtime
, "time");
7939 DEFSYM (Qcutime
, "cutime");
7940 DEFSYM (Qcstime
, "cstime");
7941 DEFSYM (Qctime
, "ctime");
7943 DEFSYM (Qinternal_default_process_sentinel
,
7944 "internal-default-process-sentinel");
7945 DEFSYM (Qinternal_default_process_filter
,
7946 "internal-default-process-filter");
7948 DEFSYM (Qpri
, "pri");
7949 DEFSYM (Qnice
, "nice");
7950 DEFSYM (Qthcount
, "thcount");
7951 DEFSYM (Qstart
, "start");
7952 DEFSYM (Qvsize
, "vsize");
7953 DEFSYM (Qrss
, "rss");
7954 DEFSYM (Qetime
, "etime");
7955 DEFSYM (Qpcpu
, "pcpu");
7956 DEFSYM (Qpmem
, "pmem");
7957 DEFSYM (Qargs
, "args");
7959 DEFVAR_BOOL ("delete-exited-processes", delete_exited_processes
,
7960 doc
: /* Non-nil means delete processes immediately when they exit.
7961 A value of nil means don't delete them until `list-processes' is run. */);
7963 delete_exited_processes
= 1;
7966 DEFVAR_LISP ("process-connection-type", Vprocess_connection_type
,
7967 doc
: /* Control type of device used to communicate with subprocesses.
7968 Values are nil to use a pipe, or t or `pty' to use a pty.
7969 The value has no effect if the system has no ptys or if all ptys are busy:
7970 then a pipe is used in any case.
7971 The value takes effect when `start-process' is called. */);
7972 Vprocess_connection_type
= Qt
;
7974 DEFVAR_LISP ("process-adaptive-read-buffering", Vprocess_adaptive_read_buffering
,
7975 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7976 On some systems, when Emacs reads the output from a subprocess, the output data
7977 is read in very small blocks, potentially resulting in very poor performance.
7978 This behavior can be remedied to some extent by setting this variable to a
7979 non-nil value, as it will automatically delay reading from such processes, to
7980 allow them to produce more output before Emacs tries to read it.
7981 If the value is t, the delay is reset after each write to the process; any other
7982 non-nil value means that the delay is not reset on write.
7983 The variable takes effect when `start-process' is called. */);
7984 Vprocess_adaptive_read_buffering
= Qt
;
7986 defsubr (&Sprocessp
);
7987 defsubr (&Sget_process
);
7988 defsubr (&Sdelete_process
);
7989 defsubr (&Sprocess_status
);
7990 defsubr (&Sprocess_exit_status
);
7991 defsubr (&Sprocess_id
);
7992 defsubr (&Sprocess_name
);
7993 defsubr (&Sprocess_tty_name
);
7994 defsubr (&Sprocess_command
);
7995 defsubr (&Sset_process_buffer
);
7996 defsubr (&Sprocess_buffer
);
7997 defsubr (&Sprocess_mark
);
7998 defsubr (&Sset_process_filter
);
7999 defsubr (&Sprocess_filter
);
8000 defsubr (&Sset_process_sentinel
);
8001 defsubr (&Sprocess_sentinel
);
8002 defsubr (&Sset_process_window_size
);
8003 defsubr (&Sset_process_inherit_coding_system_flag
);
8004 defsubr (&Sset_process_query_on_exit_flag
);
8005 defsubr (&Sprocess_query_on_exit_flag
);
8006 defsubr (&Sprocess_contact
);
8007 defsubr (&Sprocess_plist
);
8008 defsubr (&Sset_process_plist
);
8009 defsubr (&Sprocess_list
);
8010 defsubr (&Smake_process
);
8011 defsubr (&Smake_pipe_process
);
8012 defsubr (&Sserial_process_configure
);
8013 defsubr (&Smake_serial_process
);
8014 defsubr (&Sset_network_process_option
);
8015 defsubr (&Smake_network_process
);
8016 defsubr (&Sformat_network_address
);
8017 defsubr (&Snetwork_interface_list
);
8018 defsubr (&Snetwork_interface_info
);
8019 #ifdef DATAGRAM_SOCKETS
8020 defsubr (&Sprocess_datagram_address
);
8021 defsubr (&Sset_process_datagram_address
);
8023 defsubr (&Saccept_process_output
);
8024 defsubr (&Sprocess_send_region
);
8025 defsubr (&Sprocess_send_string
);
8026 defsubr (&Sinterrupt_process
);
8027 defsubr (&Skill_process
);
8028 defsubr (&Squit_process
);
8029 defsubr (&Sstop_process
);
8030 defsubr (&Scontinue_process
);
8031 defsubr (&Sprocess_running_child_p
);
8032 defsubr (&Sprocess_send_eof
);
8033 defsubr (&Ssignal_process
);
8034 defsubr (&Swaiting_for_user_input_p
);
8035 defsubr (&Sprocess_type
);
8036 defsubr (&Sinternal_default_process_sentinel
);
8037 defsubr (&Sinternal_default_process_filter
);
8038 defsubr (&Sset_process_coding_system
);
8039 defsubr (&Sprocess_coding_system
);
8040 defsubr (&Sset_process_filter_multibyte
);
8041 defsubr (&Sprocess_filter_multibyte_p
);
8044 Lisp_Object subfeatures
= Qnil
;
8045 const struct socket_options
*sopt
;
8047 #define ADD_SUBFEATURE(key, val) \
8048 subfeatures = pure_cons (pure_cons (key, pure_cons (val, Qnil)), subfeatures)
8050 ADD_SUBFEATURE (QCnowait
, Qt
);
8051 #ifdef DATAGRAM_SOCKETS
8052 ADD_SUBFEATURE (QCtype
, Qdatagram
);
8054 #ifdef HAVE_SEQPACKET
8055 ADD_SUBFEATURE (QCtype
, Qseqpacket
);
8057 #ifdef HAVE_LOCAL_SOCKETS
8058 ADD_SUBFEATURE (QCfamily
, Qlocal
);
8060 ADD_SUBFEATURE (QCfamily
, Qipv4
);
8062 ADD_SUBFEATURE (QCfamily
, Qipv6
);
8064 #ifdef HAVE_GETSOCKNAME
8065 ADD_SUBFEATURE (QCservice
, Qt
);
8067 ADD_SUBFEATURE (QCserver
, Qt
);
8069 for (sopt
= socket_options
; sopt
->name
; sopt
++)
8070 subfeatures
= pure_cons (intern_c_string (sopt
->name
), subfeatures
);
8072 Fprovide (intern_c_string ("make-network-process"), subfeatures
);
8075 #endif /* subprocesses */
8077 defsubr (&Sget_buffer_process
);
8078 defsubr (&Sprocess_inherit_coding_system_flag
);
8079 defsubr (&Slist_system_processes
);
8080 defsubr (&Sprocess_attributes
);