1 /* Asynchronous subprocess control for GNU Emacs.
3 Copyright (C) 1985-1988, 1993-1996, 1998-1999, 2001-2012
4 Free Software Foundation, Inc.
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
11 (at 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/>. */
24 #define PROCESS_INLINE EXTERN_INLINE
28 #include <sys/types.h> /* Some typedefs are used in sys/file.h. */
36 /* Only MS-DOS does not define `subprocesses'. */
39 #include <sys/socket.h>
41 #include <netinet/in.h>
42 #include <arpa/inet.h>
44 /* Are local (unix) sockets supported? */
45 #if defined (HAVE_SYS_UN_H)
46 #if !defined (AF_LOCAL) && defined (AF_UNIX)
47 #define AF_LOCAL AF_UNIX
50 #define HAVE_LOCAL_SOCKETS
55 #include <sys/ioctl.h>
56 #if defined (HAVE_NET_IF_H)
58 #endif /* HAVE_NET_IF_H */
60 #if defined (HAVE_IFADDRS_H)
61 /* Must be after net/if.h */
64 /* We only use structs from this header when we use getifaddrs. */
65 #if defined (HAVE_NET_IF_DL_H)
66 #include <net/if_dl.h>
76 # include <sys/stream.h>
77 # include <sys/stropts.h>
81 #include <netinet/in.h>
82 #include <arpa/nameser.h>
94 #endif /* subprocesses */
100 #include "character.h"
105 #include "termhooks.h"
106 #include "termopts.h"
107 #include "commands.h"
108 #include "keyboard.h"
109 #include "blockinput.h"
110 #include "dispextern.h"
111 #include "composite.h"
113 #include "sysselect.h"
114 #include "syssignal.h"
120 #ifdef HAVE_WINDOW_SYSTEM
122 #endif /* HAVE_WINDOW_SYSTEM */
124 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
125 #include "xgselect.h"
129 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
130 EMACS_TIME
*, void *);
133 /* This is for DOS_NT ports. FIXME: Remove this old portability cruft
134 by having DOS_NT ports implement waitpid instead of wait. Nowadays
135 POSIXish hosts all define waitpid, WNOHANG, and WUNTRACED, as these
136 have been standard since POSIX.1-1988. */
139 # define waitpid(pid, status, options) wait (status)
145 /* Work around GCC 4.7.0 bug with strict overflow checking; see
146 <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52904>.
147 These lines can be removed once the GCC bug is fixed. */
148 #if (__GNUC__ == 4 && 3 <= __GNUC_MINOR__) || 4 < __GNUC__
149 # pragma GCC diagnostic ignored "-Wstrict-overflow"
152 Lisp_Object Qeuid
, Qegid
, Qcomm
, Qstate
, Qppid
, Qpgrp
, Qsess
, Qttname
, Qtpgid
;
153 Lisp_Object Qminflt
, Qmajflt
, Qcminflt
, Qcmajflt
, Qutime
, Qstime
, Qcstime
;
154 Lisp_Object Qcutime
, Qpri
, Qnice
, Qthcount
, Qstart
, Qvsize
, Qrss
, Qargs
;
155 Lisp_Object Quser
, Qgroup
, Qetime
, Qpcpu
, Qpmem
, Qtime
, Qctime
;
156 Lisp_Object QCname
, QCtype
;
158 /* Non-zero if keyboard input is on hold, zero otherwise. */
160 static int kbd_is_on_hold
;
162 /* Nonzero means don't run process sentinels. This is used
164 int inhibit_sentinels
;
168 Lisp_Object Qprocessp
;
169 static Lisp_Object Qrun
, Qstop
, Qsignal
;
170 static Lisp_Object Qopen
, Qclosed
, Qconnect
, Qfailed
, Qlisten
;
172 static Lisp_Object Qipv4
, Qdatagram
, Qseqpacket
;
173 static Lisp_Object Qreal
, Qnetwork
, Qserial
;
175 static Lisp_Object Qipv6
;
177 static Lisp_Object QCport
, QCprocess
;
179 Lisp_Object QCbytesize
, QCstopbits
, QCparity
, Qodd
, Qeven
;
180 Lisp_Object QCflowcontrol
, Qhw
, Qsw
, QCsummary
;
181 static Lisp_Object QCbuffer
, QChost
, QCservice
;
182 static Lisp_Object QClocal
, QCremote
, QCcoding
;
183 static Lisp_Object QCserver
, QCnowait
, QCnoquery
, QCstop
;
184 static Lisp_Object QCsentinel
, QClog
, QCoptions
, QCplist
;
185 static Lisp_Object Qlast_nonmenu_event
;
187 #define NETCONN_P(p) (EQ (XPROCESS (p)->type, Qnetwork))
188 #define NETCONN1_P(p) (EQ (p->type, Qnetwork))
189 #define SERIALCONN_P(p) (EQ (XPROCESS (p)->type, Qserial))
190 #define SERIALCONN1_P(p) (EQ (p->type, Qserial))
196 /* Number of events of change of status of a process. */
197 static EMACS_INT process_tick
;
198 /* Number of events for which the user or sentinel has been notified. */
199 static EMACS_INT update_tick
;
201 /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */
203 /* Only W32 has this, it really means that select can't take write mask. */
204 #ifdef BROKEN_NON_BLOCKING_CONNECT
205 #undef NON_BLOCKING_CONNECT
206 #define SELECT_CANT_DO_WRITE_MASK
208 #ifndef NON_BLOCKING_CONNECT
210 #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX)
211 #if defined (O_NONBLOCK) || defined (O_NDELAY)
212 #if defined (EWOULDBLOCK) || defined (EINPROGRESS)
213 #define NON_BLOCKING_CONNECT
214 #endif /* EWOULDBLOCK || EINPROGRESS */
215 #endif /* O_NONBLOCK || O_NDELAY */
216 #endif /* HAVE_GETPEERNAME || GNU_LINUX */
217 #endif /* HAVE_SELECT */
218 #endif /* NON_BLOCKING_CONNECT */
219 #endif /* BROKEN_NON_BLOCKING_CONNECT */
221 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
222 this system. We need to read full packets, so we need a
223 "non-destructive" select. So we require either native select,
224 or emulation of select using FIONREAD. */
226 #ifndef BROKEN_DATAGRAM_SOCKETS
227 # if defined HAVE_SELECT || defined USABLE_FIONREAD
228 # if defined HAVE_SENDTO && defined HAVE_RECVFROM && defined EMSGSIZE
229 # define DATAGRAM_SOCKETS
234 #if defined HAVE_LOCAL_SOCKETS && defined DATAGRAM_SOCKETS
235 # define HAVE_SEQPACKET
238 #if !defined (ADAPTIVE_READ_BUFFERING) && !defined (NO_ADAPTIVE_READ_BUFFERING)
239 #define ADAPTIVE_READ_BUFFERING
242 #ifdef ADAPTIVE_READ_BUFFERING
243 #define READ_OUTPUT_DELAY_INCREMENT (EMACS_TIME_RESOLUTION / 100)
244 #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5)
245 #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7)
247 /* Number of processes which have a non-zero read_output_delay,
248 and therefore might be delayed for adaptive read buffering. */
250 static int process_output_delay_count
;
252 /* Non-zero if any process has non-nil read_output_skip. */
254 static int process_output_skip
;
257 #define process_output_delay_count 0
260 static void create_process (Lisp_Object
, char **, Lisp_Object
);
262 static int keyboard_bit_set (SELECT_TYPE
*);
264 static void deactivate_process (Lisp_Object
);
265 static void status_notify (struct Lisp_Process
*);
266 static int read_process_output (Lisp_Object
, int);
267 static void handle_child_signal (int);
268 static void create_pty (Lisp_Object
);
270 /* If we support a window system, turn on the code to poll periodically
271 to detect C-g. It isn't actually used when doing interrupt input. */
272 #ifdef HAVE_WINDOW_SYSTEM
273 #define POLL_FOR_INPUT
276 static Lisp_Object
get_process (register Lisp_Object name
);
277 static void exec_sentinel (Lisp_Object proc
, Lisp_Object reason
);
279 /* Mask of bits indicating the descriptors that we wait for input on. */
281 static SELECT_TYPE input_wait_mask
;
283 /* Mask that excludes keyboard input descriptor(s). */
285 static SELECT_TYPE non_keyboard_wait_mask
;
287 /* Mask that excludes process input descriptor(s). */
289 static SELECT_TYPE non_process_wait_mask
;
291 /* Mask for selecting for write. */
293 static SELECT_TYPE write_mask
;
295 #ifdef NON_BLOCKING_CONNECT
296 /* Mask of bits indicating the descriptors that we wait for connect to
297 complete on. Once they complete, they are removed from this mask
298 and added to the input_wait_mask and non_keyboard_wait_mask. */
300 static SELECT_TYPE connect_wait_mask
;
302 /* Number of bits set in connect_wait_mask. */
303 static int num_pending_connects
;
304 #endif /* NON_BLOCKING_CONNECT */
306 /* The largest descriptor currently in use for a process object. */
307 static int max_process_desc
;
309 /* The largest descriptor currently in use for input. */
310 static int max_input_desc
;
312 /* Indexed by descriptor, gives the process (if any) for that descriptor */
313 static Lisp_Object chan_process
[MAXDESC
];
315 /* Alist of elements (NAME . PROCESS) */
316 static Lisp_Object Vprocess_alist
;
318 /* Buffered-ahead input char from process, indexed by channel.
319 -1 means empty (no char is buffered).
320 Used on sys V where the only way to tell if there is any
321 output from the process is to read at least one char.
322 Always -1 on systems that support FIONREAD. */
324 static int proc_buffered_char
[MAXDESC
];
326 /* Table of `struct coding-system' for each process. */
327 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
328 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
330 #ifdef DATAGRAM_SOCKETS
331 /* Table of `partner address' for datagram sockets. */
332 static struct sockaddr_and_len
{
335 } datagram_address
[MAXDESC
];
336 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
337 #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XPROCESS (proc)->infd].sa != 0)
339 #define DATAGRAM_CHAN_P(chan) (0)
340 #define DATAGRAM_CONN_P(proc) (0)
343 /* Maximum number of bytes to send to a pty without an eof. */
344 static int pty_max_bytes
;
346 /* These setters are used only in this file, so they can be private. */
348 pset_buffer (struct Lisp_Process
*p
, Lisp_Object val
)
353 pset_command (struct Lisp_Process
*p
, Lisp_Object val
)
358 pset_decode_coding_system (struct Lisp_Process
*p
, Lisp_Object val
)
360 p
->decode_coding_system
= val
;
363 pset_decoding_buf (struct Lisp_Process
*p
, Lisp_Object val
)
365 p
->decoding_buf
= val
;
368 pset_encode_coding_system (struct Lisp_Process
*p
, Lisp_Object val
)
370 p
->encode_coding_system
= val
;
373 pset_encoding_buf (struct Lisp_Process
*p
, Lisp_Object val
)
375 p
->encoding_buf
= val
;
378 pset_filter (struct Lisp_Process
*p
, Lisp_Object val
)
383 pset_log (struct Lisp_Process
*p
, Lisp_Object val
)
388 pset_mark (struct Lisp_Process
*p
, Lisp_Object val
)
393 pset_name (struct Lisp_Process
*p
, Lisp_Object val
)
398 pset_plist (struct Lisp_Process
*p
, Lisp_Object val
)
403 pset_sentinel (struct Lisp_Process
*p
, Lisp_Object val
)
408 pset_status (struct Lisp_Process
*p
, Lisp_Object val
)
413 pset_tty_name (struct Lisp_Process
*p
, Lisp_Object val
)
418 pset_type (struct Lisp_Process
*p
, Lisp_Object val
)
423 pset_write_queue (struct Lisp_Process
*p
, Lisp_Object val
)
425 p
->write_queue
= val
;
430 static struct fd_callback_data
436 int condition
; /* mask of the defines above. */
437 } fd_callback_info
[MAXDESC
];
440 /* Add a file descriptor FD to be monitored for when read is possible.
441 When read is possible, call FUNC with argument DATA. */
444 add_read_fd (int fd
, fd_callback func
, void *data
)
446 eassert (fd
< MAXDESC
);
447 add_keyboard_wait_descriptor (fd
);
449 fd_callback_info
[fd
].func
= func
;
450 fd_callback_info
[fd
].data
= data
;
451 fd_callback_info
[fd
].condition
|= FOR_READ
;
454 /* Stop monitoring file descriptor FD for when read is possible. */
457 delete_read_fd (int fd
)
459 eassert (fd
< MAXDESC
);
460 delete_keyboard_wait_descriptor (fd
);
462 fd_callback_info
[fd
].condition
&= ~FOR_READ
;
463 if (fd_callback_info
[fd
].condition
== 0)
465 fd_callback_info
[fd
].func
= 0;
466 fd_callback_info
[fd
].data
= 0;
470 /* Add a file descriptor FD to be monitored for when write is possible.
471 When write is possible, call FUNC with argument DATA. */
474 add_write_fd (int fd
, fd_callback func
, void *data
)
476 eassert (fd
< MAXDESC
);
477 FD_SET (fd
, &write_mask
);
478 if (fd
> max_input_desc
)
481 fd_callback_info
[fd
].func
= func
;
482 fd_callback_info
[fd
].data
= data
;
483 fd_callback_info
[fd
].condition
|= FOR_WRITE
;
486 /* Stop monitoring file descriptor FD for when write is possible. */
489 delete_write_fd (int fd
)
491 int lim
= max_input_desc
;
493 eassert (fd
< MAXDESC
);
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;
501 if (fd
== max_input_desc
)
502 for (fd
= lim
; fd
>= 0; fd
--)
503 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
513 /* Compute the Lisp form of the process status, p->status, from
514 the numeric status that was returned by `wait'. */
516 static Lisp_Object
status_convert (int);
519 update_status (struct Lisp_Process
*p
)
521 eassert (p
->raw_status_new
);
522 pset_status (p
, status_convert (p
->raw_status
));
523 p
->raw_status_new
= 0;
526 /* Convert a process status word in Unix format to
527 the list that we use internally. */
530 status_convert (int w
)
533 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
534 else if (WIFEXITED (w
))
535 return Fcons (Qexit
, Fcons (make_number (WEXITSTATUS (w
)),
536 WCOREDUMP (w
) ? Qt
: Qnil
));
537 else if (WIFSIGNALED (w
))
538 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
539 WCOREDUMP (w
) ? Qt
: Qnil
));
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
, int *code
, int *coredump
)
562 *code
= XFASTINT (XCAR (tem
));
564 *coredump
= !NILP (tem
);
568 /* Return a string describing a process status list. */
571 status_message (struct Lisp_Process
*p
)
573 Lisp_Object status
= p
->status
;
576 Lisp_Object string
, string2
;
578 decode_status (status
, &symbol
, &code
, &coredump
);
580 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
583 synchronize_system_messages_locale ();
584 signame
= strsignal (code
);
586 string
= build_string ("unknown");
591 string
= build_unibyte_string (signame
);
592 if (! NILP (Vlocale_coding_system
))
593 string
= (code_convert_string_norecord
594 (string
, Vlocale_coding_system
, 0));
595 c1
= STRING_CHAR (SDATA (string
));
598 Faset (string
, make_number (0), make_number (c2
));
600 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
601 return concat2 (string
, string2
);
603 else if (EQ (symbol
, Qexit
))
606 return build_string (code
== 0 ? "deleted\n" : "connection broken by remote peer\n");
608 return build_string ("finished\n");
609 string
= Fnumber_to_string (make_number (code
));
610 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
611 return concat3 (build_string ("exited abnormally with code "),
614 else if (EQ (symbol
, Qfailed
))
616 string
= Fnumber_to_string (make_number (code
));
617 string2
= build_string ("\n");
618 return concat3 (build_string ("failed with code "),
622 return Fcopy_sequence (Fsymbol_name (symbol
));
627 /* The file name of the pty opened by allocate_pty. */
628 static char pty_name
[24];
630 /* Open an available pty, returning a file descriptor.
631 Return -1 on failure.
632 The file name of the terminal corresponding to the pty
633 is left in the variable pty_name. */
644 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
645 for (i
= 0; i
< 16; i
++)
648 #ifdef PTY_NAME_SPRINTF
651 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
652 #endif /* no PTY_NAME_SPRINTF */
656 #else /* no PTY_OPEN */
659 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
661 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
664 #endif /* no PTY_OPEN */
668 /* check to make certain that both sides are available
669 this avoids a nasty yet stupid bug in rlogins */
670 #ifdef PTY_TTY_NAME_SPRINTF
673 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
674 #endif /* no PTY_TTY_NAME_SPRINTF */
675 if (access (pty_name
, 6) != 0)
690 #endif /* HAVE_PTYS */
693 make_process (Lisp_Object name
)
695 register Lisp_Object val
, tem
, name1
;
696 register struct Lisp_Process
*p
;
697 char suffix
[sizeof "<>" + INT_STRLEN_BOUND (printmax_t
)];
700 p
= allocate_process ();
701 /* Initialize Lisp data. Note that allocate_process initializes all
702 Lisp data to nil, so do it only for slots which should not be nil. */
703 pset_status (p
, Qrun
);
704 pset_mark (p
, Fmake_marker ());
706 /* Initialize non-Lisp data. Note that allocate_process zeroes out all
707 non-Lisp data, so do it only for slots which should not be zero. */
712 p
->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
715 /* If name is already in use, modify it until it is unused. */
720 tem
= Fget_process (name1
);
721 if (NILP (tem
)) break;
722 name1
= concat2 (name
, make_formatted_string (suffix
, "<%"pMd
">", i
));
726 XSETPROCESS (val
, p
);
727 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
732 remove_process (register Lisp_Object proc
)
734 register Lisp_Object pair
;
736 pair
= Frassq (proc
, Vprocess_alist
);
737 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
739 deactivate_process (proc
);
743 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
744 doc
: /* Return t if OBJECT is a process. */)
747 return PROCESSP (object
) ? Qt
: Qnil
;
750 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
751 doc
: /* Return the process named NAME, or nil if there is none. */)
752 (register Lisp_Object name
)
757 return Fcdr (Fassoc (name
, Vprocess_alist
));
760 /* This is how commands for the user decode process arguments. It
761 accepts a process, a process name, a buffer, a buffer name, or nil.
762 Buffers denote the first process in the buffer, and nil denotes the
766 get_process (register Lisp_Object name
)
768 register Lisp_Object proc
, obj
;
771 obj
= Fget_process (name
);
773 obj
= Fget_buffer (name
);
775 error ("Process %s does not exist", SDATA (name
));
777 else if (NILP (name
))
778 obj
= Fcurrent_buffer ();
782 /* Now obj should be either a buffer object or a process object.
786 proc
= Fget_buffer_process (obj
);
788 error ("Buffer %s has no process", SDATA (BVAR (XBUFFER (obj
), name
)));
800 /* Fdelete_process promises to immediately forget about the process, but in
801 reality, Emacs needs to remember those processes until they have been
802 treated by the SIGCHLD handler and waitpid has been invoked on them;
803 otherwise they might fill up the kernel's process table. */
804 static Lisp_Object deleted_pid_list
;
807 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
808 doc
: /* Delete PROCESS: kill it and forget about it immediately.
809 PROCESS may be a process, a buffer, the name of a process or buffer, or
810 nil, indicating the current buffer's process. */)
811 (register Lisp_Object process
)
813 register struct Lisp_Process
*p
;
815 process
= get_process (process
);
816 p
= XPROCESS (process
);
818 p
->raw_status_new
= 0;
819 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
821 pset_status (p
, Fcons (Qexit
, Fcons (make_number (0), Qnil
)));
822 p
->tick
= ++process_tick
;
824 redisplay_preserve_echo_area (13);
826 else if (p
->infd
>= 0)
832 /* No problem storing the pid here, as it is still in Vprocess_alist. */
833 deleted_pid_list
= Fcons (make_fixnum_or_float (pid
),
834 /* GC treated elements set to nil. */
835 Fdelq (Qnil
, deleted_pid_list
));
836 /* If the process has already signaled, remove it from the list. */
837 if (p
->raw_status_new
)
840 if (CONSP (p
->status
))
841 symbol
= XCAR (p
->status
);
842 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
844 = Fdelete (make_fixnum_or_float (pid
), deleted_pid_list
);
848 Fkill_process (process
, Qnil
);
849 /* Do this now, since remove_process will make the
850 SIGCHLD handler do nothing. */
851 pset_status (p
, Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
)));
852 p
->tick
= ++process_tick
;
854 redisplay_preserve_echo_area (13);
857 remove_process (process
);
861 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
862 doc
: /* Return the status of PROCESS.
863 The returned value is one of the following symbols:
864 run -- for a process that is running.
865 stop -- for a process stopped but continuable.
866 exit -- for a process that has exited.
867 signal -- for a process that has got a fatal signal.
868 open -- for a network stream connection that is open.
869 listen -- for a network stream server that is listening.
870 closed -- for a network stream connection that is closed.
871 connect -- when waiting for a non-blocking connection to complete.
872 failed -- when a non-blocking connection has failed.
873 nil -- if arg is a process name and no such process exists.
874 PROCESS may be a process, a buffer, the name of a process, or
875 nil, indicating the current buffer's process. */)
876 (register Lisp_Object process
)
878 register struct Lisp_Process
*p
;
879 register Lisp_Object status
;
881 if (STRINGP (process
))
882 process
= Fget_process (process
);
884 process
= get_process (process
);
889 p
= XPROCESS (process
);
890 if (p
->raw_status_new
)
894 status
= XCAR (status
);
895 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
897 if (EQ (status
, Qexit
))
899 else if (EQ (p
->command
, Qt
))
901 else if (EQ (status
, Qrun
))
907 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
909 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
910 If PROCESS has not yet exited or died, return 0. */)
911 (register Lisp_Object process
)
913 CHECK_PROCESS (process
);
914 if (XPROCESS (process
)->raw_status_new
)
915 update_status (XPROCESS (process
));
916 if (CONSP (XPROCESS (process
)->status
))
917 return XCAR (XCDR (XPROCESS (process
)->status
));
918 return make_number (0);
921 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
922 doc
: /* Return the process id of PROCESS.
923 This is the pid of the external process which PROCESS uses or talks to.
924 For a network connection, this value is nil. */)
925 (register Lisp_Object process
)
929 CHECK_PROCESS (process
);
930 pid
= XPROCESS (process
)->pid
;
931 return (pid
? make_fixnum_or_float (pid
) : Qnil
);
934 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
935 doc
: /* Return the name of PROCESS, as a string.
936 This is the name of the program invoked in PROCESS,
937 possibly modified to make it unique among process names. */)
938 (register Lisp_Object process
)
940 CHECK_PROCESS (process
);
941 return XPROCESS (process
)->name
;
944 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
945 doc
: /* Return the command that was executed to start PROCESS.
946 This is a list of strings, the first string being the program executed
947 and the rest of the strings being the arguments given to it.
948 For a network or serial process, this is nil (process is running) or t
949 \(process is stopped). */)
950 (register Lisp_Object process
)
952 CHECK_PROCESS (process
);
953 return XPROCESS (process
)->command
;
956 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
957 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
958 This is the terminal that the process itself reads and writes on,
959 not the name of the pty that Emacs uses to talk with that terminal. */)
960 (register Lisp_Object process
)
962 CHECK_PROCESS (process
);
963 return XPROCESS (process
)->tty_name
;
966 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
968 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil).
970 (register Lisp_Object process
, Lisp_Object buffer
)
972 struct Lisp_Process
*p
;
974 CHECK_PROCESS (process
);
976 CHECK_BUFFER (buffer
);
977 p
= XPROCESS (process
);
978 pset_buffer (p
, buffer
);
979 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
980 pset_childp (p
, Fplist_put (p
->childp
, QCbuffer
, buffer
));
981 setup_process_coding_systems (process
);
985 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
987 doc
: /* Return the buffer PROCESS is associated with.
988 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
989 (register Lisp_Object process
)
991 CHECK_PROCESS (process
);
992 return XPROCESS (process
)->buffer
;
995 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
997 doc
: /* Return the marker for the end of the last output from PROCESS. */)
998 (register Lisp_Object process
)
1000 CHECK_PROCESS (process
);
1001 return XPROCESS (process
)->mark
;
1004 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
1006 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
1007 A value of t means stop accepting output from the process.
1009 When a process has a filter, its buffer is not used for output.
1010 Instead, each time it does output, the entire string of output is
1011 passed to the filter.
1013 The filter gets two arguments: the process and the string of output.
1014 The string argument is normally a multibyte string, except:
1015 - if the process' input coding system is no-conversion or raw-text,
1016 it is a unibyte string (the non-converted input), or else
1017 - if `default-enable-multibyte-characters' is nil, it is a unibyte
1018 string (the result of converting the decoded input multibyte
1019 string to unibyte with `string-make-unibyte'). */)
1020 (register Lisp_Object process
, Lisp_Object filter
)
1022 struct Lisp_Process
*p
;
1024 CHECK_PROCESS (process
);
1025 p
= XPROCESS (process
);
1027 /* Don't signal an error if the process' input file descriptor
1028 is closed. This could make debugging Lisp more difficult,
1029 for example when doing something like
1031 (setq process (start-process ...))
1033 (set-process-filter process ...) */
1037 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
1039 FD_CLR (p
->infd
, &input_wait_mask
);
1040 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
1042 else if (EQ (p
->filter
, Qt
)
1043 /* Network or serial process not stopped: */
1044 && !EQ (p
->command
, Qt
))
1046 FD_SET (p
->infd
, &input_wait_mask
);
1047 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
1051 pset_filter (p
, filter
);
1052 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1053 pset_childp (p
, Fplist_put (p
->childp
, QCfilter
, filter
));
1054 setup_process_coding_systems (process
);
1058 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
1060 doc
: /* Returns the filter function of PROCESS; nil if none.
1061 See `set-process-filter' for more info on filter functions. */)
1062 (register Lisp_Object process
)
1064 CHECK_PROCESS (process
);
1065 return XPROCESS (process
)->filter
;
1068 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
1070 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
1071 The sentinel is called as a function when the process changes state.
1072 It gets two arguments: the process, and a string describing the change. */)
1073 (register Lisp_Object process
, Lisp_Object sentinel
)
1075 struct Lisp_Process
*p
;
1077 CHECK_PROCESS (process
);
1078 p
= XPROCESS (process
);
1080 pset_sentinel (p
, sentinel
);
1081 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1082 pset_childp (p
, Fplist_put (p
->childp
, QCsentinel
, sentinel
));
1086 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1088 doc
: /* Return the sentinel of PROCESS; nil if none.
1089 See `set-process-sentinel' for more info on sentinels. */)
1090 (register Lisp_Object process
)
1092 CHECK_PROCESS (process
);
1093 return XPROCESS (process
)->sentinel
;
1096 DEFUN ("set-process-window-size", Fset_process_window_size
,
1097 Sset_process_window_size
, 3, 3, 0,
1098 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1099 (register Lisp_Object process
, Lisp_Object height
, Lisp_Object width
)
1101 CHECK_PROCESS (process
);
1102 CHECK_RANGED_INTEGER (height
, 0, INT_MAX
);
1103 CHECK_RANGED_INTEGER (width
, 0, INT_MAX
);
1105 if (XPROCESS (process
)->infd
< 0
1106 || set_window_size (XPROCESS (process
)->infd
,
1107 XINT (height
), XINT (width
)) <= 0)
1113 DEFUN ("set-process-inherit-coding-system-flag",
1114 Fset_process_inherit_coding_system_flag
,
1115 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1116 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1117 If the second argument FLAG is non-nil, then the variable
1118 `buffer-file-coding-system' of the buffer associated with PROCESS
1119 will be bound to the value of the coding system used to decode
1122 This is useful when the coding system specified for the process buffer
1123 leaves either the character code conversion or the end-of-line conversion
1124 unspecified, or if the coding system used to decode the process output
1125 is more appropriate for saving the process buffer.
1127 Binding the variable `inherit-process-coding-system' to non-nil before
1128 starting the process is an alternative way of setting the inherit flag
1129 for the process which will run.
1131 This function returns FLAG. */)
1132 (register Lisp_Object process
, Lisp_Object flag
)
1134 CHECK_PROCESS (process
);
1135 XPROCESS (process
)->inherit_coding_system_flag
= !NILP (flag
);
1139 DEFUN ("set-process-query-on-exit-flag",
1140 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1142 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1143 If the second argument FLAG is non-nil, Emacs will query the user before
1144 exiting or killing a buffer if PROCESS is running. This function
1146 (register Lisp_Object process
, Lisp_Object flag
)
1148 CHECK_PROCESS (process
);
1149 XPROCESS (process
)->kill_without_query
= NILP (flag
);
1153 DEFUN ("process-query-on-exit-flag",
1154 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1156 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1157 (register Lisp_Object process
)
1159 CHECK_PROCESS (process
);
1160 return (XPROCESS (process
)->kill_without_query
? Qnil
: Qt
);
1163 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1165 doc
: /* Return the contact info of PROCESS; t for a real child.
1166 For a network or serial connection, the value depends on the optional
1167 KEY arg. If KEY is nil, value is a cons cell of the form (HOST
1168 SERVICE) for a network connection or (PORT SPEED) for a serial
1169 connection. If KEY is t, the complete contact information for the
1170 connection is returned, else the specific value for the keyword KEY is
1171 returned. See `make-network-process' or `make-serial-process' for a
1172 list of keywords. */)
1173 (register Lisp_Object process
, Lisp_Object key
)
1175 Lisp_Object contact
;
1177 CHECK_PROCESS (process
);
1178 contact
= XPROCESS (process
)->childp
;
1180 #ifdef DATAGRAM_SOCKETS
1181 if (DATAGRAM_CONN_P (process
)
1182 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1183 contact
= Fplist_put (contact
, QCremote
,
1184 Fprocess_datagram_address (process
));
1187 if ((!NETCONN_P (process
) && !SERIALCONN_P (process
)) || EQ (key
, Qt
))
1189 if (NILP (key
) && NETCONN_P (process
))
1190 return Fcons (Fplist_get (contact
, QChost
),
1191 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1192 if (NILP (key
) && SERIALCONN_P (process
))
1193 return Fcons (Fplist_get (contact
, QCport
),
1194 Fcons (Fplist_get (contact
, QCspeed
), Qnil
));
1195 return Fplist_get (contact
, key
);
1198 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1200 doc
: /* Return the plist of PROCESS. */)
1201 (register Lisp_Object process
)
1203 CHECK_PROCESS (process
);
1204 return XPROCESS (process
)->plist
;
1207 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1209 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1210 (register Lisp_Object process
, Lisp_Object plist
)
1212 CHECK_PROCESS (process
);
1215 pset_plist (XPROCESS (process
), plist
);
1219 #if 0 /* Turned off because we don't currently record this info
1220 in the process. Perhaps add it. */
1221 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1222 doc
: /* Return the connection type of PROCESS.
1223 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1224 a socket connection. */)
1225 (Lisp_Object process
)
1227 return XPROCESS (process
)->type
;
1231 DEFUN ("process-type", Fprocess_type
, Sprocess_type
, 1, 1, 0,
1232 doc
: /* Return the connection type of PROCESS.
1233 The value is either the symbol `real', `network', or `serial'.
1234 PROCESS may be a process, a buffer, the name of a process or buffer, or
1235 nil, indicating the current buffer's process. */)
1236 (Lisp_Object process
)
1239 proc
= get_process (process
);
1240 return XPROCESS (proc
)->type
;
1243 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1245 doc
: /* Convert network ADDRESS from internal format to a string.
1246 A 4 or 5 element vector represents an IPv4 address (with port number).
1247 An 8 or 9 element vector represents an IPv6 address (with port number).
1248 If optional second argument OMIT-PORT is non-nil, don't include a port
1249 number in the string, even when present in ADDRESS.
1250 Returns nil if format of ADDRESS is invalid. */)
1251 (Lisp_Object address
, Lisp_Object omit_port
)
1256 if (STRINGP (address
)) /* AF_LOCAL */
1259 if (VECTORP (address
)) /* AF_INET or AF_INET6 */
1261 register struct Lisp_Vector
*p
= XVECTOR (address
);
1262 ptrdiff_t size
= p
->header
.size
;
1263 Lisp_Object args
[10];
1266 if (size
== 4 || (size
== 5 && !NILP (omit_port
)))
1268 args
[0] = build_string ("%d.%d.%d.%d");
1273 args
[0] = build_string ("%d.%d.%d.%d:%d");
1276 else if (size
== 8 || (size
== 9 && !NILP (omit_port
)))
1278 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
1283 args
[0] = build_string ("[%x:%x:%x:%x:%x:%x:%x:%x]:%d");
1289 for (i
= 0; i
< nargs
; i
++)
1291 if (! RANGED_INTEGERP (0, p
->contents
[i
], 65535))
1294 if (nargs
<= 5 /* IPv4 */
1295 && i
< 4 /* host, not port */
1296 && XINT (p
->contents
[i
]) > 255)
1299 args
[i
+1] = p
->contents
[i
];
1302 return Fformat (nargs
+1, args
);
1305 if (CONSP (address
))
1307 Lisp_Object args
[2];
1308 args
[0] = build_string ("<Family %d>");
1309 args
[1] = Fcar (address
);
1310 return Fformat (2, args
);
1316 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1317 doc
: /* Return a list of all processes. */)
1320 return Fmapcar (Qcdr
, Vprocess_alist
);
1323 /* Starting asynchronous inferior processes. */
1325 static Lisp_Object
start_process_unwind (Lisp_Object proc
);
1327 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1328 doc
: /* Start a program in a subprocess. Return the process object for it.
1329 NAME is name for process. It is modified if necessary to make it unique.
1330 BUFFER is the buffer (or buffer name) to associate with the process.
1332 Process output (both standard output and standard error streams) goes
1333 at end of BUFFER, unless you specify an output stream or filter
1334 function to handle the output. BUFFER may also be nil, meaning that
1335 this process is not associated with any buffer.
1337 PROGRAM is the program file name. It is searched for in `exec-path'
1338 (which see). If nil, just associate a pty with the buffer. Remaining
1339 arguments are strings to give program as arguments.
1341 If you want to separate standard output from standard error, invoke
1342 the command through a shell and redirect one of them using the shell
1345 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1346 (ptrdiff_t nargs
, Lisp_Object
*args
)
1348 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1349 register unsigned char **new_argv
;
1351 ptrdiff_t count
= SPECPDL_INDEX ();
1355 buffer
= Fget_buffer_create (buffer
);
1357 /* Make sure that the child will be able to chdir to the current
1358 buffer's current directory, or its unhandled equivalent. We
1359 can't just have the child check for an error when it does the
1360 chdir, since it's in a vfork.
1362 We have to GCPRO around this because Fexpand_file_name and
1363 Funhandled_file_name_directory might call a file name handling
1364 function. The argument list is protected by the caller, so all
1365 we really have to worry about is buffer. */
1367 struct gcpro gcpro1
, gcpro2
;
1369 current_dir
= BVAR (current_buffer
, directory
);
1371 GCPRO2 (buffer
, current_dir
);
1373 current_dir
= Funhandled_file_name_directory (current_dir
);
1374 if (NILP (current_dir
))
1375 /* If the file name handler says that current_dir is unreachable, use
1376 a sensible default. */
1377 current_dir
= build_string ("~/");
1378 current_dir
= expand_and_dir_to_file (current_dir
, Qnil
);
1379 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1380 report_file_error ("Setting current directory",
1381 Fcons (BVAR (current_buffer
, directory
), Qnil
));
1387 CHECK_STRING (name
);
1391 if (!NILP (program
))
1392 CHECK_STRING (program
);
1394 proc
= make_process (name
);
1395 /* If an error occurs and we can't start the process, we want to
1396 remove it from the process list. This means that each error
1397 check in create_process doesn't need to call remove_process
1398 itself; it's all taken care of here. */
1399 record_unwind_protect (start_process_unwind
, proc
);
1401 pset_childp (XPROCESS (proc
), Qt
);
1402 pset_plist (XPROCESS (proc
), Qnil
);
1403 pset_type (XPROCESS (proc
), Qreal
);
1404 pset_buffer (XPROCESS (proc
), buffer
);
1405 pset_sentinel (XPROCESS (proc
), Qnil
);
1406 pset_filter (XPROCESS (proc
), Qnil
);
1407 pset_command (XPROCESS (proc
), Flist (nargs
- 2, args
+ 2));
1410 /* AKA GNUTLS_INITSTAGE(proc). */
1411 XPROCESS (proc
)->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
1412 pset_gnutls_cred_type (XPROCESS (proc
), Qnil
);
1415 #ifdef ADAPTIVE_READ_BUFFERING
1416 XPROCESS (proc
)->adaptive_read_buffering
1417 = (NILP (Vprocess_adaptive_read_buffering
) ? 0
1418 : EQ (Vprocess_adaptive_read_buffering
, Qt
) ? 1 : 2);
1421 /* Make the process marker point into the process buffer (if any). */
1422 if (BUFFERP (buffer
))
1423 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1424 BUF_ZV (XBUFFER (buffer
)),
1425 BUF_ZV_BYTE (XBUFFER (buffer
)));
1428 /* Decide coding systems for communicating with the process. Here
1429 we don't setup the structure coding_system nor pay attention to
1430 unibyte mode. They are done in create_process. */
1432 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1433 Lisp_Object coding_systems
= Qt
;
1434 Lisp_Object val
, *args2
;
1435 struct gcpro gcpro1
, gcpro2
;
1437 val
= Vcoding_system_for_read
;
1440 args2
= alloca ((nargs
+ 1) * sizeof *args2
);
1441 args2
[0] = Qstart_process
;
1442 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1443 GCPRO2 (proc
, current_dir
);
1444 if (!NILP (program
))
1445 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1447 if (CONSP (coding_systems
))
1448 val
= XCAR (coding_systems
);
1449 else if (CONSP (Vdefault_process_coding_system
))
1450 val
= XCAR (Vdefault_process_coding_system
);
1452 pset_decode_coding_system (XPROCESS (proc
), val
);
1454 val
= Vcoding_system_for_write
;
1457 if (EQ (coding_systems
, Qt
))
1459 args2
= alloca ((nargs
+ 1) * sizeof *args2
);
1460 args2
[0] = Qstart_process
;
1461 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1462 GCPRO2 (proc
, current_dir
);
1463 if (!NILP (program
))
1464 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1467 if (CONSP (coding_systems
))
1468 val
= XCDR (coding_systems
);
1469 else if (CONSP (Vdefault_process_coding_system
))
1470 val
= XCDR (Vdefault_process_coding_system
);
1472 pset_encode_coding_system (XPROCESS (proc
), val
);
1473 /* Note: At this moment, the above coding system may leave
1474 text-conversion or eol-conversion unspecified. They will be
1475 decided after we read output from the process and decode it by
1476 some coding system, or just before we actually send a text to
1481 pset_decoding_buf (XPROCESS (proc
), empty_unibyte_string
);
1482 XPROCESS (proc
)->decoding_carryover
= 0;
1483 pset_encoding_buf (XPROCESS (proc
), empty_unibyte_string
);
1485 XPROCESS (proc
)->inherit_coding_system_flag
1486 = !(NILP (buffer
) || !inherit_process_coding_system
);
1488 if (!NILP (program
))
1490 /* If program file name is not absolute, search our path for it.
1491 Put the name we will really use in TEM. */
1492 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1493 && !(SCHARS (program
) > 1
1494 && IS_DEVICE_SEP (SREF (program
, 1))))
1496 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1499 GCPRO4 (name
, program
, buffer
, current_dir
);
1500 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1503 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1504 tem
= Fexpand_file_name (tem
, Qnil
);
1508 if (!NILP (Ffile_directory_p (program
)))
1509 error ("Specified program for new process is a directory");
1513 /* If program file name starts with /: for quoting a magic name,
1515 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1516 && SREF (tem
, 1) == ':')
1517 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1520 Lisp_Object arg_encoding
= Qnil
;
1521 struct gcpro gcpro1
;
1524 /* Encode the file name and put it in NEW_ARGV.
1525 That's where the child will use it to execute the program. */
1526 tem
= Fcons (ENCODE_FILE (tem
), Qnil
);
1528 /* Here we encode arguments by the coding system used for sending
1529 data to the process. We don't support using different coding
1530 systems for encoding arguments and for encoding data sent to the
1533 for (i
= 3; i
< nargs
; i
++)
1535 tem
= Fcons (args
[i
], tem
);
1536 CHECK_STRING (XCAR (tem
));
1537 if (STRING_MULTIBYTE (XCAR (tem
)))
1539 if (NILP (arg_encoding
))
1540 arg_encoding
= (complement_process_encoding_system
1541 (XPROCESS (proc
)->encode_coding_system
));
1543 code_convert_string_norecord
1544 (XCAR (tem
), arg_encoding
, 1));
1551 /* Now that everything is encoded we can collect the strings into
1553 new_argv
= alloca ((nargs
- 1) * sizeof *new_argv
);
1554 new_argv
[nargs
- 2] = 0;
1556 for (i
= nargs
- 2; i
-- != 0; )
1558 new_argv
[i
] = SDATA (XCAR (tem
));
1562 create_process (proc
, (char **) new_argv
, current_dir
);
1567 return unbind_to (count
, proc
);
1570 /* This function is the unwind_protect form for Fstart_process. If
1571 PROC doesn't have its pid set, then we know someone has signaled
1572 an error and the process wasn't started successfully, so we should
1573 remove it from the process list. */
1575 start_process_unwind (Lisp_Object proc
)
1577 if (!PROCESSP (proc
))
1580 /* Was PROC started successfully?
1581 -2 is used for a pty with no process, eg for gdb. */
1582 if (XPROCESS (proc
)->pid
<= 0 && XPROCESS (proc
)->pid
!= -2)
1583 remove_process (proc
);
1589 create_process_1 (struct atimer
*timer
)
1591 /* Nothing to do. */
1596 create_process (Lisp_Object process
, char **new_argv
, Lisp_Object current_dir
)
1598 int inchannel
, outchannel
;
1601 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1602 int wait_child_setup
[2];
1607 /* Use volatile to protect variables from being clobbered by vfork. */
1608 volatile int forkin
, forkout
;
1609 volatile int pty_flag
= 0;
1610 volatile Lisp_Object lisp_pty_name
= Qnil
;
1611 volatile Lisp_Object encoded_current_dir
;
1612 #if HAVE_WORKING_VFORK
1613 char **volatile save_environ
;
1616 inchannel
= outchannel
= -1;
1619 if (!NILP (Vprocess_connection_type
))
1620 outchannel
= inchannel
= allocate_pty ();
1624 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1625 /* On most USG systems it does not work to open the pty's tty here,
1626 then close it and reopen it in the child. */
1628 /* Don't let this terminal become our controlling terminal
1629 (in case we don't have one). */
1630 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1632 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1635 report_file_error ("Opening pty", Qnil
);
1637 forkin
= forkout
= -1;
1638 #endif /* not USG, or USG_SUBTTY_WORKS */
1640 lisp_pty_name
= build_string (pty_name
);
1643 #endif /* HAVE_PTYS */
1648 report_file_error ("Creating pipe", Qnil
);
1654 emacs_close (inchannel
);
1655 emacs_close (forkout
);
1656 report_file_error ("Creating pipe", Qnil
);
1662 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1666 tem
= pipe (wait_child_setup
);
1668 report_file_error ("Creating pipe", Qnil
);
1669 tem
= fcntl (wait_child_setup
[1], F_GETFD
, 0);
1671 tem
= fcntl (wait_child_setup
[1], F_SETFD
, tem
| FD_CLOEXEC
);
1674 emacs_close (wait_child_setup
[0]);
1675 emacs_close (wait_child_setup
[1]);
1676 report_file_error ("Setting file descriptor flags", Qnil
);
1682 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1683 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1686 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1687 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1691 /* Record this as an active process, with its channels.
1692 As a result, child_setup will close Emacs's side of the pipes. */
1693 chan_process
[inchannel
] = process
;
1694 XPROCESS (process
)->infd
= inchannel
;
1695 XPROCESS (process
)->outfd
= outchannel
;
1697 /* Previously we recorded the tty descriptor used in the subprocess.
1698 It was only used for getting the foreground tty process, so now
1699 we just reopen the device (see emacs_get_tty_pgrp) as this is
1700 more portable (see USG_SUBTTY_WORKS above). */
1702 XPROCESS (process
)->pty_flag
= pty_flag
;
1703 pset_status (XPROCESS (process
), Qrun
);
1705 FD_SET (inchannel
, &input_wait_mask
);
1706 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1707 if (inchannel
> max_process_desc
)
1708 max_process_desc
= inchannel
;
1710 /* This may signal an error. */
1711 setup_process_coding_systems (process
);
1713 encoded_current_dir
= ENCODE_FILE (current_dir
);
1718 /* Block SIGCHLD until we have a chance to store the new fork's
1719 pid in its process structure. */
1720 sigemptyset (&blocked
);
1721 sigaddset (&blocked
, SIGCHLD
);
1722 pthread_sigmask (SIG_BLOCK
, &blocked
, 0);
1725 #if HAVE_WORKING_VFORK
1726 /* child_setup must clobber environ on systems with true vfork.
1727 Protect it from permanent change. */
1728 save_environ
= environ
;
1734 #endif /* not WINDOWSNT */
1736 int xforkin
= forkin
;
1737 int xforkout
= forkout
;
1739 /* Make the pty be the controlling terminal of the process. */
1741 /* First, disconnect its current controlling terminal. */
1743 /* We tried doing setsid only if pty_flag, but it caused
1744 process_set_signal to fail on SGI when using a pipe. */
1746 /* Make the pty's terminal the controlling terminal. */
1747 if (pty_flag
&& xforkin
>= 0)
1750 /* We ignore the return value
1751 because faith@cs.unc.edu says that is necessary on Linux. */
1752 ioctl (xforkin
, TIOCSCTTY
, 0);
1755 #else /* not HAVE_SETSID */
1756 /* It's very important to call setpgid here and no time
1757 afterwards. Otherwise, we lose our controlling tty which
1758 is set when we open the pty. */
1760 #endif /* not HAVE_SETSID */
1761 #if defined (LDISC1)
1762 if (pty_flag
&& xforkin
>= 0)
1765 tcgetattr (xforkin
, &t
);
1767 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1768 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1771 #if defined (NTTYDISC) && defined (TIOCSETD)
1772 if (pty_flag
&& xforkin
>= 0)
1774 /* Use new line discipline. */
1775 int ldisc
= NTTYDISC
;
1776 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1781 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1782 can do TIOCSPGRP only to the process's controlling tty. */
1785 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1786 I can't test it since I don't have 4.3. */
1787 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1790 ioctl (j
, TIOCNOTTY
, 0);
1794 /* In order to get a controlling terminal on some versions
1795 of BSD, it is necessary to put the process in pgrp 0
1796 before it opens the terminal. */
1800 #endif /* TIOCNOTTY */
1802 #if !defined (DONT_REOPEN_PTY)
1803 /*** There is a suggestion that this ought to be a
1804 conditional on TIOCSPGRP,
1805 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1806 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1807 that system does seem to need this code, even though
1808 both HAVE_SETSID and TIOCSCTTY are defined. */
1809 /* Now close the pty (if we had it open) and reopen it.
1810 This makes the pty the controlling terminal of the subprocess. */
1814 /* I wonder if emacs_close (emacs_open (pty_name, ...))
1817 emacs_close (xforkin
);
1818 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
1822 emacs_write (1, "Couldn't open the pty terminal ", 31);
1823 emacs_write (1, pty_name
, strlen (pty_name
));
1824 emacs_write (1, "\n", 1);
1829 #endif /* not DONT_REOPEN_PTY */
1831 #ifdef SETUP_SLAVE_PTY
1836 #endif /* SETUP_SLAVE_PTY */
1838 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1839 Now reenable it in the child, so it will die when we want it to. */
1841 signal (SIGHUP
, SIG_DFL
);
1843 #endif /* HAVE_PTYS */
1845 signal (SIGINT
, SIG_DFL
);
1846 signal (SIGQUIT
, SIG_DFL
);
1848 /* Emacs ignores SIGPIPE, but the child should not. */
1849 signal (SIGPIPE
, SIG_DFL
);
1852 /* Stop blocking signals in the child. */
1853 pthread_sigmask (SIG_SETMASK
, &empty_mask
, 0);
1857 child_setup_tty (xforkout
);
1859 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1860 new_argv
, 1, encoded_current_dir
);
1861 #else /* not WINDOWSNT */
1863 emacs_close (wait_child_setup
[0]);
1865 child_setup (xforkin
, xforkout
, xforkout
,
1866 new_argv
, 1, encoded_current_dir
);
1867 #endif /* not WINDOWSNT */
1870 /* Back in the parent process. */
1872 #if HAVE_WORKING_VFORK
1873 environ
= save_environ
;
1876 XPROCESS (process
)->pid
= pid
;
1878 XPROCESS (process
)->alive
= 1;
1880 /* Stop blocking signals in the parent. */
1882 pthread_sigmask (SIG_SETMASK
, &empty_mask
, 0);
1889 emacs_close (forkin
);
1890 if (forkin
!= forkout
&& forkout
>= 0)
1891 emacs_close (forkout
);
1895 /* vfork succeeded. */
1898 register_child (pid
, inchannel
);
1899 #endif /* WINDOWSNT */
1901 /* If the subfork execv fails, and it exits,
1902 this close hangs. I don't know why.
1903 So have an interrupt jar it loose. */
1905 struct atimer
*timer
;
1906 EMACS_TIME offset
= make_emacs_time (1, 0);
1909 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
1912 emacs_close (forkin
);
1914 cancel_atimer (timer
);
1918 if (forkin
!= forkout
&& forkout
>= 0)
1919 emacs_close (forkout
);
1921 pset_tty_name (XPROCESS (process
), lisp_pty_name
);
1923 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1924 /* Wait for child_setup to complete in case that vfork is
1925 actually defined as fork. The descriptor wait_child_setup[1]
1926 of a pipe is closed at the child side either by close-on-exec
1927 on successful execvp or the _exit call in child_setup. */
1931 emacs_close (wait_child_setup
[1]);
1932 emacs_read (wait_child_setup
[0], &dummy
, 1);
1933 emacs_close (wait_child_setup
[0]);
1938 /* Now generate the error if vfork failed. */
1940 report_file_error ("Doing vfork", Qnil
);
1944 create_pty (Lisp_Object process
)
1946 int inchannel
, outchannel
;
1949 inchannel
= outchannel
= -1;
1952 if (!NILP (Vprocess_connection_type
))
1953 outchannel
= inchannel
= allocate_pty ();
1957 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1958 /* On most USG systems it does not work to open the pty's tty here,
1959 then close it and reopen it in the child. */
1961 /* Don't let this terminal become our controlling terminal
1962 (in case we don't have one). */
1963 int forkout
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1965 int forkout
= emacs_open (pty_name
, O_RDWR
, 0);
1968 report_file_error ("Opening pty", Qnil
);
1969 #if defined (DONT_REOPEN_PTY)
1970 /* In the case that vfork is defined as fork, the parent process
1971 (Emacs) may send some data before the child process completes
1972 tty options setup. So we setup tty before forking. */
1973 child_setup_tty (forkout
);
1974 #endif /* DONT_REOPEN_PTY */
1975 #endif /* not USG, or USG_SUBTTY_WORKS */
1978 #endif /* HAVE_PTYS */
1981 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1982 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1985 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1986 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1990 /* Record this as an active process, with its channels.
1991 As a result, child_setup will close Emacs's side of the pipes. */
1992 chan_process
[inchannel
] = process
;
1993 XPROCESS (process
)->infd
= inchannel
;
1994 XPROCESS (process
)->outfd
= outchannel
;
1996 /* Previously we recorded the tty descriptor used in the subprocess.
1997 It was only used for getting the foreground tty process, so now
1998 we just reopen the device (see emacs_get_tty_pgrp) as this is
1999 more portable (see USG_SUBTTY_WORKS above). */
2001 XPROCESS (process
)->pty_flag
= pty_flag
;
2002 pset_status (XPROCESS (process
), Qrun
);
2003 setup_process_coding_systems (process
);
2005 FD_SET (inchannel
, &input_wait_mask
);
2006 FD_SET (inchannel
, &non_keyboard_wait_mask
);
2007 if (inchannel
> max_process_desc
)
2008 max_process_desc
= inchannel
;
2010 XPROCESS (process
)->pid
= -2;
2013 pset_tty_name (XPROCESS (process
), build_string (pty_name
));
2016 pset_tty_name (XPROCESS (process
), Qnil
);
2020 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2021 The address family of sa is not included in the result. */
2024 conv_sockaddr_to_lisp (struct sockaddr
*sa
, int len
)
2026 Lisp_Object address
;
2029 register struct Lisp_Vector
*p
;
2031 /* Workaround for a bug in getsockname on BSD: Names bound to
2032 sockets in the UNIX domain are inaccessible; getsockname returns
2033 a zero length name. */
2034 if (len
< offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
))
2035 return empty_unibyte_string
;
2037 switch (sa
->sa_family
)
2041 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2042 len
= sizeof (sin
->sin_addr
) + 1;
2043 address
= Fmake_vector (make_number (len
), Qnil
);
2044 p
= XVECTOR (address
);
2045 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2046 cp
= (unsigned char *) &sin
->sin_addr
;
2052 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2053 uint16_t *ip6
= (uint16_t *) &sin6
->sin6_addr
;
2054 len
= sizeof (sin6
->sin6_addr
)/2 + 1;
2055 address
= Fmake_vector (make_number (len
), Qnil
);
2056 p
= XVECTOR (address
);
2057 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
2058 for (i
= 0; i
< len
; i
++)
2059 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
2063 #ifdef HAVE_LOCAL_SOCKETS
2066 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2067 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2068 if (sockun
->sun_path
[i
] == 0)
2070 return make_unibyte_string (sockun
->sun_path
, i
);
2074 len
-= offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
);
2075 address
= Fcons (make_number (sa
->sa_family
),
2076 Fmake_vector (make_number (len
), Qnil
));
2077 p
= XVECTOR (XCDR (address
));
2078 cp
= (unsigned char *) &sa
->sa_family
+ sizeof (sa
->sa_family
);
2084 p
->contents
[i
++] = make_number (*cp
++);
2090 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2093 get_lisp_to_sockaddr_size (Lisp_Object address
, int *familyp
)
2095 register struct Lisp_Vector
*p
;
2097 if (VECTORP (address
))
2099 p
= XVECTOR (address
);
2100 if (p
->header
.size
== 5)
2103 return sizeof (struct sockaddr_in
);
2106 else if (p
->header
.size
== 9)
2108 *familyp
= AF_INET6
;
2109 return sizeof (struct sockaddr_in6
);
2113 #ifdef HAVE_LOCAL_SOCKETS
2114 else if (STRINGP (address
))
2116 *familyp
= AF_LOCAL
;
2117 return sizeof (struct sockaddr_un
);
2120 else if (CONSP (address
) && TYPE_RANGED_INTEGERP (int, XCAR (address
))
2121 && VECTORP (XCDR (address
)))
2123 struct sockaddr
*sa
;
2124 *familyp
= XINT (XCAR (address
));
2125 p
= XVECTOR (XCDR (address
));
2126 return p
->header
.size
+ sizeof (sa
->sa_family
);
2131 /* Convert an address object (vector or string) to an internal sockaddr.
2133 The address format has been basically validated by
2134 get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid;
2135 it could have come from user data. So if FAMILY is not valid,
2136 we return after zeroing *SA. */
2139 conv_lisp_to_sockaddr (int family
, Lisp_Object address
, struct sockaddr
*sa
, int len
)
2141 register struct Lisp_Vector
*p
;
2142 register unsigned char *cp
= NULL
;
2146 memset (sa
, 0, len
);
2148 if (VECTORP (address
))
2150 p
= XVECTOR (address
);
2151 if (family
== AF_INET
)
2153 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2154 len
= sizeof (sin
->sin_addr
) + 1;
2155 hostport
= XINT (p
->contents
[--len
]);
2156 sin
->sin_port
= htons (hostport
);
2157 cp
= (unsigned char *)&sin
->sin_addr
;
2158 sa
->sa_family
= family
;
2161 else if (family
== AF_INET6
)
2163 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2164 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2165 len
= sizeof (sin6
->sin6_addr
) + 1;
2166 hostport
= XINT (p
->contents
[--len
]);
2167 sin6
->sin6_port
= htons (hostport
);
2168 for (i
= 0; i
< len
; i
++)
2169 if (INTEGERP (p
->contents
[i
]))
2171 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2174 sa
->sa_family
= family
;
2181 else if (STRINGP (address
))
2183 #ifdef HAVE_LOCAL_SOCKETS
2184 if (family
== AF_LOCAL
)
2186 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2187 cp
= SDATA (address
);
2188 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2189 sockun
->sun_path
[i
] = *cp
++;
2190 sa
->sa_family
= family
;
2197 p
= XVECTOR (XCDR (address
));
2198 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2201 for (i
= 0; i
< len
; i
++)
2202 if (INTEGERP (p
->contents
[i
]))
2203 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2206 #ifdef DATAGRAM_SOCKETS
2207 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2209 doc
: /* Get the current datagram address associated with PROCESS. */)
2210 (Lisp_Object process
)
2214 CHECK_PROCESS (process
);
2216 if (!DATAGRAM_CONN_P (process
))
2219 channel
= XPROCESS (process
)->infd
;
2220 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2221 datagram_address
[channel
].len
);
2224 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2226 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2227 Returns nil upon error setting address, ADDRESS otherwise. */)
2228 (Lisp_Object process
, Lisp_Object address
)
2233 CHECK_PROCESS (process
);
2235 if (!DATAGRAM_CONN_P (process
))
2238 channel
= XPROCESS (process
)->infd
;
2240 len
= get_lisp_to_sockaddr_size (address
, &family
);
2241 if (datagram_address
[channel
].len
!= len
)
2243 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2249 static const struct socket_options
{
2250 /* The name of this option. Should be lowercase version of option
2251 name without SO_ prefix. */
2253 /* Option level SOL_... */
2255 /* Option number SO_... */
2257 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2258 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2259 } socket_options
[] =
2261 #ifdef SO_BINDTODEVICE
2262 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2265 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2268 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2271 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2274 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2277 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2280 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2283 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2285 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2288 /* Set option OPT to value VAL on socket S.
2290 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2291 Signals an error if setting a known option fails.
2295 set_socket_option (int s
, Lisp_Object opt
, Lisp_Object val
)
2298 const struct socket_options
*sopt
;
2303 name
= SSDATA (SYMBOL_NAME (opt
));
2304 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2305 if (strcmp (name
, sopt
->name
) == 0)
2308 switch (sopt
->opttype
)
2313 optval
= NILP (val
) ? 0 : 1;
2314 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2315 &optval
, sizeof (optval
));
2322 if (TYPE_RANGED_INTEGERP (int, val
))
2323 optval
= XINT (val
);
2325 error ("Bad option value for %s", name
);
2326 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2327 &optval
, sizeof (optval
));
2331 #ifdef SO_BINDTODEVICE
2334 char devname
[IFNAMSIZ
+1];
2336 /* This is broken, at least in the Linux 2.4 kernel.
2337 To unbind, the arg must be a zero integer, not the empty string.
2338 This should work on all systems. KFS. 2003-09-23. */
2339 memset (devname
, 0, sizeof devname
);
2342 char *arg
= SSDATA (val
);
2343 int len
= min (strlen (arg
), IFNAMSIZ
);
2344 memcpy (devname
, arg
, len
);
2346 else if (!NILP (val
))
2347 error ("Bad option value for %s", name
);
2348 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2357 struct linger linger
;
2360 linger
.l_linger
= 0;
2361 if (TYPE_RANGED_INTEGERP (int, val
))
2362 linger
.l_linger
= XINT (val
);
2364 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2365 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2366 &linger
, sizeof (linger
));
2376 report_file_error ("Cannot set network option",
2377 Fcons (opt
, Fcons (val
, Qnil
)));
2378 return (1 << sopt
->optbit
);
2382 DEFUN ("set-network-process-option",
2383 Fset_network_process_option
, Sset_network_process_option
,
2385 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2386 See `make-network-process' for a list of options and values.
2387 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2388 OPTION is not a supported option, return nil instead; otherwise return t. */)
2389 (Lisp_Object process
, Lisp_Object option
, Lisp_Object value
, Lisp_Object no_error
)
2392 struct Lisp_Process
*p
;
2394 CHECK_PROCESS (process
);
2395 p
= XPROCESS (process
);
2396 if (!NETCONN1_P (p
))
2397 error ("Process is not a network process");
2401 error ("Process is not running");
2403 if (set_socket_option (s
, option
, value
))
2405 pset_childp (p
, Fplist_put (p
->childp
, option
, value
));
2409 if (NILP (no_error
))
2410 error ("Unknown or unsupported option");
2416 DEFUN ("serial-process-configure",
2417 Fserial_process_configure
,
2418 Sserial_process_configure
,
2420 doc
: /* Configure speed, bytesize, etc. of a serial process.
2422 Arguments are specified as keyword/argument pairs. Attributes that
2423 are not given are re-initialized from the process's current
2424 configuration (available via the function `process-contact') or set to
2425 reasonable default values. The following arguments are defined:
2431 -- Any of these arguments can be given to identify the process that is
2432 to be configured. If none of these arguments is given, the current
2433 buffer's process is used.
2435 :speed SPEED -- SPEED is the speed of the serial port in bits per
2436 second, also called baud rate. Any value can be given for SPEED, but
2437 most serial ports work only at a few defined values between 1200 and
2438 115200, with 9600 being the most common value. If SPEED is nil, the
2439 serial port is not configured any further, i.e., all other arguments
2440 are ignored. This may be useful for special serial ports such as
2441 Bluetooth-to-serial converters which can only be configured through AT
2442 commands. A value of nil for SPEED can be used only when passed
2443 through `make-serial-process' or `serial-term'.
2445 :bytesize BYTESIZE -- BYTESIZE is the number of bits per byte, which
2446 can be 7 or 8. If BYTESIZE is not given or nil, a value of 8 is used.
2448 :parity PARITY -- PARITY can be nil (don't use parity), the symbol
2449 `odd' (use odd parity), or the symbol `even' (use even parity). If
2450 PARITY is not given, no parity is used.
2452 :stopbits STOPBITS -- STOPBITS is the number of stopbits used to
2453 terminate a byte transmission. STOPBITS can be 1 or 2. If STOPBITS
2454 is not given or nil, 1 stopbit is used.
2456 :flowcontrol FLOWCONTROL -- FLOWCONTROL determines the type of
2457 flowcontrol to be used, which is either nil (don't use flowcontrol),
2458 the symbol `hw' (use RTS/CTS hardware flowcontrol), or the symbol `sw'
2459 \(use XON/XOFF software flowcontrol). If FLOWCONTROL is not given, no
2460 flowcontrol is used.
2462 `serial-process-configure' is called by `make-serial-process' for the
2463 initial configuration of the serial port.
2467 \(serial-process-configure :process "/dev/ttyS0" :speed 1200)
2469 \(serial-process-configure
2470 :buffer "COM1" :stopbits 1 :parity 'odd :flowcontrol 'hw)
2472 \(serial-process-configure :port "\\\\.\\COM13" :bytesize 7)
2474 usage: (serial-process-configure &rest ARGS) */)
2475 (ptrdiff_t nargs
, Lisp_Object
*args
)
2477 struct Lisp_Process
*p
;
2478 Lisp_Object contact
= Qnil
;
2479 Lisp_Object proc
= Qnil
;
2480 struct gcpro gcpro1
;
2482 contact
= Flist (nargs
, args
);
2485 proc
= Fplist_get (contact
, QCprocess
);
2487 proc
= Fplist_get (contact
, QCname
);
2489 proc
= Fplist_get (contact
, QCbuffer
);
2491 proc
= Fplist_get (contact
, QCport
);
2492 proc
= get_process (proc
);
2493 p
= XPROCESS (proc
);
2494 if (!EQ (p
->type
, Qserial
))
2495 error ("Not a serial process");
2497 if (NILP (Fplist_get (p
->childp
, QCspeed
)))
2503 serial_configure (p
, contact
);
2509 /* Used by make-serial-process to recover from errors. */
2511 make_serial_process_unwind (Lisp_Object proc
)
2513 if (!PROCESSP (proc
))
2515 remove_process (proc
);
2519 DEFUN ("make-serial-process", Fmake_serial_process
, Smake_serial_process
,
2521 doc
: /* Create and return a serial port process.
2523 In Emacs, serial port connections are represented by process objects,
2524 so input and output work as for subprocesses, and `delete-process'
2525 closes a serial port connection. However, a serial process has no
2526 process id, it cannot be signaled, and the status codes are different
2527 from normal processes.
2529 `make-serial-process' creates a process and a buffer, on which you
2530 probably want to use `process-send-string'. Try \\[serial-term] for
2531 an interactive terminal. See below for examples.
2533 Arguments are specified as keyword/argument pairs. The following
2534 arguments are defined:
2536 :port PORT -- (mandatory) PORT is the path or name of the serial port.
2537 For example, this could be "/dev/ttyS0" on Unix. On Windows, this
2538 could be "COM1", or "\\\\.\\COM10" for ports higher than COM9 (double
2539 the backslashes in strings).
2541 :speed SPEED -- (mandatory) is handled by `serial-process-configure',
2542 which this function calls.
2544 :name NAME -- NAME is the name of the process. If NAME is not given,
2545 the value of PORT is used.
2547 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2548 with the process. Process output goes at the end of that buffer,
2549 unless you specify an output stream or filter function to handle the
2550 output. If BUFFER is not given, the value of NAME is used.
2552 :coding CODING -- If CODING is a symbol, it specifies the coding
2553 system used for both reading and writing for this process. If CODING
2554 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2555 ENCODING is used for writing.
2557 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2558 the process is running. If BOOL is not given, query before exiting.
2560 :stop BOOL -- Start process in the `stopped' state if BOOL is non-nil.
2561 In the stopped state, a serial process does not accept incoming data,
2562 but you can send outgoing data. The stopped state is cleared by
2563 `continue-process' and set by `stop-process'.
2565 :filter FILTER -- Install FILTER as the process filter.
2567 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2569 :plist PLIST -- Install PLIST as the initial plist of the process.
2575 -- This function calls `serial-process-configure' to handle these
2578 The original argument list, possibly modified by later configuration,
2579 is available via the function `process-contact'.
2583 \(make-serial-process :port "/dev/ttyS0" :speed 9600)
2585 \(make-serial-process :port "COM1" :speed 115200 :stopbits 2)
2587 \(make-serial-process :port "\\\\.\\COM13" :speed 1200 :bytesize 7 :parity 'odd)
2589 \(make-serial-process :port "/dev/tty.BlueConsole-SPP-1" :speed nil)
2591 usage: (make-serial-process &rest ARGS) */)
2592 (ptrdiff_t nargs
, Lisp_Object
*args
)
2595 Lisp_Object proc
, contact
, port
;
2596 struct Lisp_Process
*p
;
2597 struct gcpro gcpro1
;
2598 Lisp_Object name
, buffer
;
2599 Lisp_Object tem
, val
;
2600 ptrdiff_t specpdl_count
= -1;
2605 contact
= Flist (nargs
, args
);
2608 port
= Fplist_get (contact
, QCport
);
2610 error ("No port specified");
2611 CHECK_STRING (port
);
2613 if (NILP (Fplist_member (contact
, QCspeed
)))
2614 error (":speed not specified");
2615 if (!NILP (Fplist_get (contact
, QCspeed
)))
2616 CHECK_NUMBER (Fplist_get (contact
, QCspeed
));
2618 name
= Fplist_get (contact
, QCname
);
2621 CHECK_STRING (name
);
2622 proc
= make_process (name
);
2623 specpdl_count
= SPECPDL_INDEX ();
2624 record_unwind_protect (make_serial_process_unwind
, proc
);
2625 p
= XPROCESS (proc
);
2627 fd
= serial_open (SSDATA (port
));
2630 if (fd
> max_process_desc
)
2631 max_process_desc
= fd
;
2632 chan_process
[fd
] = proc
;
2634 buffer
= Fplist_get (contact
, QCbuffer
);
2637 buffer
= Fget_buffer_create (buffer
);
2638 pset_buffer (p
, buffer
);
2640 pset_childp (p
, contact
);
2641 pset_plist (p
, Fcopy_sequence (Fplist_get (contact
, QCplist
)));
2642 pset_type (p
, Qserial
);
2643 pset_sentinel (p
, Fplist_get (contact
, QCsentinel
));
2644 pset_filter (p
, Fplist_get (contact
, QCfilter
));
2646 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
2647 p
->kill_without_query
= 1;
2648 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
2649 pset_command (p
, Qt
);
2652 if (!EQ (p
->command
, Qt
))
2654 FD_SET (fd
, &input_wait_mask
);
2655 FD_SET (fd
, &non_keyboard_wait_mask
);
2658 if (BUFFERP (buffer
))
2660 set_marker_both (p
->mark
, buffer
,
2661 BUF_ZV (XBUFFER (buffer
)),
2662 BUF_ZV_BYTE (XBUFFER (buffer
)));
2665 tem
= Fplist_member (contact
, QCcoding
);
2666 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
2672 val
= XCAR (XCDR (tem
));
2676 else if (!NILP (Vcoding_system_for_read
))
2677 val
= Vcoding_system_for_read
;
2678 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2679 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2681 pset_decode_coding_system (p
, val
);
2686 val
= XCAR (XCDR (tem
));
2690 else if (!NILP (Vcoding_system_for_write
))
2691 val
= Vcoding_system_for_write
;
2692 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2693 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2695 pset_encode_coding_system (p
, val
);
2697 setup_process_coding_systems (proc
);
2698 pset_decoding_buf (p
, empty_unibyte_string
);
2699 p
->decoding_carryover
= 0;
2700 pset_encoding_buf (p
, empty_unibyte_string
);
2701 p
->inherit_coding_system_flag
2702 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
2704 Fserial_process_configure (nargs
, args
);
2706 specpdl_ptr
= specpdl
+ specpdl_count
;
2712 /* Create a network stream/datagram client/server process. Treated
2713 exactly like a normal process when reading and writing. Primary
2714 differences are in status display and process deletion. A network
2715 connection has no PID; you cannot signal it. All you can do is
2716 stop/continue it and deactivate/close it via delete-process */
2718 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2720 doc
: /* Create and return a network server or client process.
2722 In Emacs, network connections are represented by process objects, so
2723 input and output work as for subprocesses and `delete-process' closes
2724 a network connection. However, a network process has no process id,
2725 it cannot be signaled, and the status codes are different from normal
2728 Arguments are specified as keyword/argument pairs. The following
2729 arguments are defined:
2731 :name NAME -- NAME is name for process. It is modified if necessary
2734 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2735 with the process. Process output goes at end of that buffer, unless
2736 you specify an output stream or filter function to handle the output.
2737 BUFFER may be also nil, meaning that this process is not associated
2740 :host HOST -- HOST is name of the host to connect to, or its IP
2741 address. The symbol `local' specifies the local host. If specified
2742 for a server process, it must be a valid name or address for the local
2743 host, and only clients connecting to that address will be accepted.
2745 :service SERVICE -- SERVICE is name of the service desired, or an
2746 integer specifying a port number to connect to. If SERVICE is t,
2747 a random port number is selected for the server. (If Emacs was
2748 compiled with getaddrinfo, a port number can also be specified as a
2749 string, e.g. "80", as well as an integer. This is not portable.)
2751 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2752 stream type connection, `datagram' creates a datagram type connection,
2753 `seqpacket' creates a reliable datagram connection.
2755 :family FAMILY -- FAMILY is the address (and protocol) family for the
2756 service specified by HOST and SERVICE. The default (nil) is to use
2757 whatever address family (IPv4 or IPv6) that is defined for the host
2758 and port number specified by HOST and SERVICE. Other address families
2760 local -- for a local (i.e. UNIX) address specified by SERVICE.
2761 ipv4 -- use IPv4 address family only.
2762 ipv6 -- use IPv6 address family only.
2764 :local ADDRESS -- ADDRESS is the local address used for the connection.
2765 This parameter is ignored when opening a client process. When specified
2766 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2768 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2769 connection. This parameter is ignored when opening a stream server
2770 process. For a datagram server process, it specifies the initial
2771 setting of the remote datagram address. When specified for a client
2772 process, the FAMILY, HOST, and SERVICE args are ignored.
2774 The format of ADDRESS depends on the address family:
2775 - An IPv4 address is represented as an vector of integers [A B C D P]
2776 corresponding to numeric IP address A.B.C.D and port number P.
2777 - A local address is represented as a string with the address in the
2778 local address space.
2779 - An "unsupported family" address is represented by a cons (F . AV)
2780 where F is the family number and AV is a vector containing the socket
2781 address data with one element per address data byte. Do not rely on
2782 this format in portable code, as it may depend on implementation
2783 defined constants, data sizes, and data structure alignment.
2785 :coding CODING -- If CODING is a symbol, it specifies the coding
2786 system used for both reading and writing for this process. If CODING
2787 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2788 ENCODING is used for writing.
2790 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2791 return without waiting for the connection to complete; instead, the
2792 sentinel function will be called with second arg matching "open" (if
2793 successful) or "failed" when the connect completes. Default is to use
2794 a blocking connect (i.e. wait) for stream type connections.
2796 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2797 running when Emacs is exited.
2799 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2800 In the stopped state, a server process does not accept new
2801 connections, and a client process does not handle incoming traffic.
2802 The stopped state is cleared by `continue-process' and set by
2805 :filter FILTER -- Install FILTER as the process filter.
2807 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2808 process filter are multibyte, otherwise they are unibyte.
2809 If this keyword is not specified, the strings are multibyte if
2810 the default value of `enable-multibyte-characters' is non-nil.
2812 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2814 :log LOG -- Install LOG as the server process log function. This
2815 function is called when the server accepts a network connection from a
2816 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2817 is the server process, CLIENT is the new process for the connection,
2818 and MESSAGE is a string.
2820 :plist PLIST -- Install PLIST as the new process' initial plist.
2822 :server QLEN -- if QLEN is non-nil, create a server process for the
2823 specified FAMILY, SERVICE, and connection type (stream or datagram).
2824 If QLEN is an integer, it is used as the max. length of the server's
2825 pending connection queue (also known as the backlog); the default
2826 queue length is 5. Default is to create a client process.
2828 The following network options can be specified for this connection:
2830 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2831 :dontroute BOOL -- Only send to directly connected hosts.
2832 :keepalive BOOL -- Send keep-alive messages on network stream.
2833 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2834 :oobinline BOOL -- Place out-of-band data in receive data stream.
2835 :priority INT -- Set protocol defined priority for sent packets.
2836 :reuseaddr BOOL -- Allow reusing a recently used local address
2837 (this is allowed by default for a server process).
2838 :bindtodevice NAME -- bind to interface NAME. Using this may require
2839 special privileges on some systems.
2841 Consult the relevant system programmer's manual pages for more
2842 information on using these options.
2845 A server process will listen for and accept connections from clients.
2846 When a client connection is accepted, a new network process is created
2847 for the connection with the following parameters:
2849 - The client's process name is constructed by concatenating the server
2850 process' NAME and a client identification string.
2851 - If the FILTER argument is non-nil, the client process will not get a
2852 separate process buffer; otherwise, the client's process buffer is a newly
2853 created buffer named after the server process' BUFFER name or process
2854 NAME concatenated with the client identification string.
2855 - The connection type and the process filter and sentinel parameters are
2856 inherited from the server process' TYPE, FILTER and SENTINEL.
2857 - The client process' contact info is set according to the client's
2858 addressing information (typically an IP address and a port number).
2859 - The client process' plist is initialized from the server's plist.
2861 Notice that the FILTER and SENTINEL args are never used directly by
2862 the server process. Also, the BUFFER argument is not used directly by
2863 the server process, but via the optional :log function, accepted (and
2864 failed) connections may be logged in the server process' buffer.
2866 The original argument list, modified with the actual connection
2867 information, is available via the `process-contact' function.
2869 usage: (make-network-process &rest ARGS) */)
2870 (ptrdiff_t nargs
, Lisp_Object
*args
)
2873 Lisp_Object contact
;
2874 struct Lisp_Process
*p
;
2875 #ifdef HAVE_GETADDRINFO
2876 struct addrinfo ai
, *res
, *lres
;
2877 struct addrinfo hints
;
2878 const char *portstring
;
2880 #else /* HAVE_GETADDRINFO */
2881 struct _emacs_addrinfo
2887 struct sockaddr
*ai_addr
;
2888 struct _emacs_addrinfo
*ai_next
;
2890 #endif /* HAVE_GETADDRINFO */
2891 struct sockaddr_in address_in
;
2892 #ifdef HAVE_LOCAL_SOCKETS
2893 struct sockaddr_un address_un
;
2898 int s
= -1, outch
, inch
;
2899 struct gcpro gcpro1
;
2900 ptrdiff_t count
= SPECPDL_INDEX ();
2902 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2904 Lisp_Object name
, buffer
, host
, service
, address
;
2905 Lisp_Object filter
, sentinel
;
2906 int is_non_blocking_client
= 0;
2907 int is_server
= 0, backlog
= 5;
2914 /* Save arguments for process-contact and clone-process. */
2915 contact
= Flist (nargs
, args
);
2919 /* Ensure socket support is loaded if available. */
2920 init_winsock (TRUE
);
2923 /* :type TYPE (nil: stream, datagram */
2924 tem
= Fplist_get (contact
, QCtype
);
2926 socktype
= SOCK_STREAM
;
2927 #ifdef DATAGRAM_SOCKETS
2928 else if (EQ (tem
, Qdatagram
))
2929 socktype
= SOCK_DGRAM
;
2931 #ifdef HAVE_SEQPACKET
2932 else if (EQ (tem
, Qseqpacket
))
2933 socktype
= SOCK_SEQPACKET
;
2936 error ("Unsupported connection type");
2939 tem
= Fplist_get (contact
, QCserver
);
2942 /* Don't support network sockets when non-blocking mode is
2943 not available, since a blocked Emacs is not useful. */
2944 #if !defined (O_NONBLOCK) && !defined (O_NDELAY)
2945 error ("Network servers not supported");
2948 if (TYPE_RANGED_INTEGERP (int, tem
))
2949 backlog
= XINT (tem
);
2953 /* Make QCaddress an alias for :local (server) or :remote (client). */
2954 QCaddress
= is_server
? QClocal
: QCremote
;
2957 if (!is_server
&& socktype
!= SOCK_DGRAM
2958 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2960 #ifndef NON_BLOCKING_CONNECT
2961 error ("Non-blocking connect not supported");
2963 is_non_blocking_client
= 1;
2967 name
= Fplist_get (contact
, QCname
);
2968 buffer
= Fplist_get (contact
, QCbuffer
);
2969 filter
= Fplist_get (contact
, QCfilter
);
2970 sentinel
= Fplist_get (contact
, QCsentinel
);
2972 CHECK_STRING (name
);
2974 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2975 ai
.ai_socktype
= socktype
;
2980 /* :local ADDRESS or :remote ADDRESS */
2981 address
= Fplist_get (contact
, QCaddress
);
2982 if (!NILP (address
))
2984 host
= service
= Qnil
;
2986 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
2987 error ("Malformed :address");
2988 ai
.ai_family
= family
;
2989 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
2990 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
2994 /* :family FAMILY -- nil (for Inet), local, or integer. */
2995 tem
= Fplist_get (contact
, QCfamily
);
2998 #if defined (HAVE_GETADDRINFO) && defined (AF_INET6)
3004 #ifdef HAVE_LOCAL_SOCKETS
3005 else if (EQ (tem
, Qlocal
))
3009 else if (EQ (tem
, Qipv6
))
3012 else if (EQ (tem
, Qipv4
))
3014 else if (TYPE_RANGED_INTEGERP (int, tem
))
3015 family
= XINT (tem
);
3017 error ("Unknown address family");
3019 ai
.ai_family
= family
;
3021 /* :service SERVICE -- string, integer (port number), or t (random port). */
3022 service
= Fplist_get (contact
, QCservice
);
3024 /* :host HOST -- hostname, ip address, or 'local for localhost. */
3025 host
= Fplist_get (contact
, QChost
);
3028 if (EQ (host
, Qlocal
))
3029 /* Depending on setup, "localhost" may map to different IPv4 and/or
3030 IPv6 addresses, so it's better to be explicit. (Bug#6781) */
3031 host
= build_string ("127.0.0.1");
3032 CHECK_STRING (host
);
3035 #ifdef HAVE_LOCAL_SOCKETS
3036 if (family
== AF_LOCAL
)
3040 message (":family local ignores the :host \"%s\" property",
3042 contact
= Fplist_put (contact
, QChost
, Qnil
);
3045 CHECK_STRING (service
);
3046 memset (&address_un
, 0, sizeof address_un
);
3047 address_un
.sun_family
= AF_LOCAL
;
3048 if (sizeof address_un
.sun_path
<= SBYTES (service
))
3049 error ("Service name too long");
3050 strcpy (address_un
.sun_path
, SSDATA (service
));
3051 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
3052 ai
.ai_addrlen
= sizeof address_un
;
3057 /* Slow down polling to every ten seconds.
3058 Some kernels have a bug which causes retrying connect to fail
3059 after a connect. Polling can interfere with gethostbyname too. */
3060 #ifdef POLL_FOR_INPUT
3061 if (socktype
!= SOCK_DGRAM
)
3063 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
3064 bind_polling_period (10);
3068 #ifdef HAVE_GETADDRINFO
3069 /* If we have a host, use getaddrinfo to resolve both host and service.
3070 Otherwise, use getservbyname to lookup the service. */
3074 /* SERVICE can either be a string or int.
3075 Convert to a C string for later use by getaddrinfo. */
3076 if (EQ (service
, Qt
))
3078 else if (INTEGERP (service
))
3080 sprintf (portbuf
, "%"pI
"d", XINT (service
));
3081 portstring
= portbuf
;
3085 CHECK_STRING (service
);
3086 portstring
= SSDATA (service
);
3091 memset (&hints
, 0, sizeof (hints
));
3093 hints
.ai_family
= family
;
3094 hints
.ai_socktype
= socktype
;
3095 hints
.ai_protocol
= 0;
3097 #ifdef HAVE_RES_INIT
3101 ret
= getaddrinfo (SSDATA (host
), portstring
, &hints
, &res
);
3103 #ifdef HAVE_GAI_STRERROR
3104 error ("%s/%s %s", SSDATA (host
), portstring
, gai_strerror (ret
));
3106 error ("%s/%s getaddrinfo error %d", SSDATA (host
), portstring
, ret
);
3112 #endif /* HAVE_GETADDRINFO */
3114 /* We end up here if getaddrinfo is not defined, or in case no hostname
3115 has been specified (e.g. for a local server process). */
3117 if (EQ (service
, Qt
))
3119 else if (INTEGERP (service
))
3120 port
= htons ((unsigned short) XINT (service
));
3123 struct servent
*svc_info
;
3124 CHECK_STRING (service
);
3125 svc_info
= getservbyname (SSDATA (service
),
3126 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3128 error ("Unknown service: %s", SDATA (service
));
3129 port
= svc_info
->s_port
;
3132 memset (&address_in
, 0, sizeof address_in
);
3133 address_in
.sin_family
= family
;
3134 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3135 address_in
.sin_port
= port
;
3137 #ifndef HAVE_GETADDRINFO
3140 struct hostent
*host_info_ptr
;
3142 /* gethostbyname may fail with TRY_AGAIN, but we don't honor that,
3143 as it may `hang' Emacs for a very long time. */
3147 #ifdef HAVE_RES_INIT
3151 host_info_ptr
= gethostbyname (SDATA (host
));
3156 memcpy (&address_in
.sin_addr
, host_info_ptr
->h_addr
,
3157 host_info_ptr
->h_length
);
3158 family
= host_info_ptr
->h_addrtype
;
3159 address_in
.sin_family
= family
;
3162 /* Attempt to interpret host as numeric inet address */
3164 unsigned long numeric_addr
;
3165 numeric_addr
= inet_addr (SSDATA (host
));
3166 if (numeric_addr
== -1)
3167 error ("Unknown host \"%s\"", SDATA (host
));
3169 memcpy (&address_in
.sin_addr
, &numeric_addr
,
3170 sizeof (address_in
.sin_addr
));
3174 #endif /* not HAVE_GETADDRINFO */
3176 ai
.ai_family
= family
;
3177 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3178 ai
.ai_addrlen
= sizeof address_in
;
3182 /* Do this in case we never enter the for-loop below. */
3183 count1
= SPECPDL_INDEX ();
3186 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3195 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3202 #ifdef DATAGRAM_SOCKETS
3203 if (!is_server
&& socktype
== SOCK_DGRAM
)
3205 #endif /* DATAGRAM_SOCKETS */
3207 #ifdef NON_BLOCKING_CONNECT
3208 if (is_non_blocking_client
)
3211 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3213 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3225 /* Make us close S if quit. */
3226 record_unwind_protect (close_file_unwind
, make_number (s
));
3228 /* Parse network options in the arg list.
3229 We simply ignore anything which isn't a known option (including other keywords).
3230 An error is signaled if setting a known option fails. */
3231 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3232 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3236 /* Configure as a server socket. */
3238 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3239 explicit :reuseaddr key to override this. */
3240 #ifdef HAVE_LOCAL_SOCKETS
3241 if (family
!= AF_LOCAL
)
3243 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3246 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3247 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3250 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3251 report_file_error ("Cannot bind server socket", Qnil
);
3253 #ifdef HAVE_GETSOCKNAME
3254 if (EQ (service
, Qt
))
3256 struct sockaddr_in sa1
;
3257 socklen_t len1
= sizeof (sa1
);
3258 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3260 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3261 service
= make_number (ntohs (sa1
.sin_port
));
3262 contact
= Fplist_put (contact
, QCservice
, service
);
3267 if (socktype
!= SOCK_DGRAM
&& listen (s
, backlog
))
3268 report_file_error ("Cannot listen on server socket", Qnil
);
3276 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3279 if (ret
== 0 || xerrno
== EISCONN
)
3281 /* The unwind-protect will be discarded afterwards.
3282 Likewise for immediate_quit. */
3286 #ifdef NON_BLOCKING_CONNECT
3288 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3292 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3299 if (xerrno
== EINTR
)
3301 /* Unlike most other syscalls connect() cannot be called
3302 again. (That would return EALREADY.) The proper way to
3303 wait for completion is pselect(). */
3311 sc
= pselect (s
+ 1, NULL
, &fdset
, NULL
, NULL
, NULL
);
3317 report_file_error ("select failed", Qnil
);
3321 len
= sizeof xerrno
;
3322 eassert (FD_ISSET (s
, &fdset
));
3323 if (getsockopt (s
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &len
) == -1)
3324 report_file_error ("getsockopt failed", Qnil
);
3326 errno
= xerrno
, report_file_error ("error during connect", Qnil
);
3330 #endif /* !WINDOWSNT */
3334 /* Discard the unwind protect closing S. */
3335 specpdl_ptr
= specpdl
+ count1
;
3340 if (xerrno
== EINTR
)
3347 #ifdef DATAGRAM_SOCKETS
3348 if (socktype
== SOCK_DGRAM
)
3350 if (datagram_address
[s
].sa
)
3352 datagram_address
[s
].sa
= xmalloc (lres
->ai_addrlen
);
3353 datagram_address
[s
].len
= lres
->ai_addrlen
;
3357 memset (datagram_address
[s
].sa
, 0, lres
->ai_addrlen
);
3358 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3361 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3362 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3363 conv_lisp_to_sockaddr (rfamily
, remote
,
3364 datagram_address
[s
].sa
, rlen
);
3368 memcpy (datagram_address
[s
].sa
, lres
->ai_addr
, lres
->ai_addrlen
);
3371 contact
= Fplist_put (contact
, QCaddress
,
3372 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3373 #ifdef HAVE_GETSOCKNAME
3376 struct sockaddr_in sa1
;
3377 socklen_t len1
= sizeof (sa1
);
3378 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3379 contact
= Fplist_put (contact
, QClocal
,
3380 conv_sockaddr_to_lisp ((struct sockaddr
*)&sa1
, len1
));
3387 #ifdef HAVE_GETADDRINFO
3396 /* Discard the unwind protect for closing S, if any. */
3397 specpdl_ptr
= specpdl
+ count1
;
3399 /* Unwind bind_polling_period and request_sigio. */
3400 unbind_to (count
, Qnil
);
3404 /* If non-blocking got this far - and failed - assume non-blocking is
3405 not supported after all. This is probably a wrong assumption, but
3406 the normal blocking calls to open-network-stream handles this error
3408 if (is_non_blocking_client
)
3413 report_file_error ("make server process failed", contact
);
3415 report_file_error ("make client process failed", contact
);
3422 buffer
= Fget_buffer_create (buffer
);
3423 proc
= make_process (name
);
3425 chan_process
[inch
] = proc
;
3428 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3431 fcntl (inch
, F_SETFL
, O_NDELAY
);
3435 p
= XPROCESS (proc
);
3437 pset_childp (p
, contact
);
3438 pset_plist (p
, Fcopy_sequence (Fplist_get (contact
, QCplist
)));
3439 pset_type (p
, Qnetwork
);
3441 pset_buffer (p
, buffer
);
3442 pset_sentinel (p
, sentinel
);
3443 pset_filter (p
, filter
);
3444 pset_log (p
, Fplist_get (contact
, QClog
));
3445 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3446 p
->kill_without_query
= 1;
3447 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3448 pset_command (p
, Qt
);
3452 if (is_server
&& socktype
!= SOCK_DGRAM
)
3453 pset_status (p
, Qlisten
);
3455 /* Make the process marker point into the process buffer (if any). */
3456 if (BUFFERP (buffer
))
3457 set_marker_both (p
->mark
, buffer
,
3458 BUF_ZV (XBUFFER (buffer
)),
3459 BUF_ZV_BYTE (XBUFFER (buffer
)));
3461 #ifdef NON_BLOCKING_CONNECT
3462 if (is_non_blocking_client
)
3464 /* We may get here if connect did succeed immediately. However,
3465 in that case, we still need to signal this like a non-blocking
3467 pset_status (p
, Qconnect
);
3468 if (!FD_ISSET (inch
, &connect_wait_mask
))
3470 FD_SET (inch
, &connect_wait_mask
);
3471 FD_SET (inch
, &write_mask
);
3472 num_pending_connects
++;
3477 /* A server may have a client filter setting of Qt, but it must
3478 still listen for incoming connects unless it is stopped. */
3479 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3480 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3482 FD_SET (inch
, &input_wait_mask
);
3483 FD_SET (inch
, &non_keyboard_wait_mask
);
3486 if (inch
> max_process_desc
)
3487 max_process_desc
= inch
;
3489 tem
= Fplist_member (contact
, QCcoding
);
3490 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3491 tem
= Qnil
; /* No error message (too late!). */
3494 /* Setup coding systems for communicating with the network stream. */
3495 struct gcpro gcpro1
;
3496 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3497 Lisp_Object coding_systems
= Qt
;
3498 Lisp_Object fargs
[5], val
;
3502 val
= XCAR (XCDR (tem
));
3506 else if (!NILP (Vcoding_system_for_read
))
3507 val
= Vcoding_system_for_read
;
3508 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
3509 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
3510 /* We dare not decode end-of-line format by setting VAL to
3511 Qraw_text, because the existing Emacs Lisp libraries
3512 assume that they receive bare code including a sequence of
3517 if (NILP (host
) || NILP (service
))
3518 coding_systems
= Qnil
;
3521 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3522 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3524 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3527 if (CONSP (coding_systems
))
3528 val
= XCAR (coding_systems
);
3529 else if (CONSP (Vdefault_process_coding_system
))
3530 val
= XCAR (Vdefault_process_coding_system
);
3534 pset_decode_coding_system (p
, val
);
3538 val
= XCAR (XCDR (tem
));
3542 else if (!NILP (Vcoding_system_for_write
))
3543 val
= Vcoding_system_for_write
;
3544 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3548 if (EQ (coding_systems
, Qt
))
3550 if (NILP (host
) || NILP (service
))
3551 coding_systems
= Qnil
;
3554 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3555 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3557 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3561 if (CONSP (coding_systems
))
3562 val
= XCDR (coding_systems
);
3563 else if (CONSP (Vdefault_process_coding_system
))
3564 val
= XCDR (Vdefault_process_coding_system
);
3568 pset_encode_coding_system (p
, val
);
3570 setup_process_coding_systems (proc
);
3572 pset_decoding_buf (p
, empty_unibyte_string
);
3573 p
->decoding_carryover
= 0;
3574 pset_encoding_buf (p
, empty_unibyte_string
);
3576 p
->inherit_coding_system_flag
3577 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3584 #if defined (HAVE_NET_IF_H)
3587 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3588 doc
: /* Return an alist of all network interfaces and their network address.
3589 Each element is a cons, the car of which is a string containing the
3590 interface name, and the cdr is the network address in internal
3591 format; see the description of ADDRESS in `make-network-process'. */)
3594 struct ifconf ifconf
;
3595 struct ifreq
*ifreq
;
3597 ptrdiff_t buf_size
= 512;
3601 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3607 buf
= xpalloc (buf
, &buf_size
, 1, INT_MAX
, 1);
3608 ifconf
.ifc_buf
= buf
;
3609 ifconf
.ifc_len
= buf_size
;
3610 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3617 while (ifconf
.ifc_len
== buf_size
);
3622 ifreq
= ifconf
.ifc_req
;
3623 while ((char *) ifreq
< (char *) ifconf
.ifc_req
+ ifconf
.ifc_len
)
3625 struct ifreq
*ifq
= ifreq
;
3626 #ifdef HAVE_STRUCT_IFREQ_IFR_ADDR_SA_LEN
3627 #define SIZEOF_IFREQ(sif) \
3628 ((sif)->ifr_addr.sa_len < sizeof (struct sockaddr) \
3629 ? sizeof (*(sif)) : sizeof ((sif)->ifr_name) + (sif)->ifr_addr.sa_len)
3631 int len
= SIZEOF_IFREQ (ifq
);
3633 int len
= sizeof (*ifreq
);
3635 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3637 ifreq
= (struct ifreq
*) ((char *) ifreq
+ len
);
3639 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3642 memcpy (namebuf
, ifq
->ifr_name
, sizeof (ifq
->ifr_name
));
3643 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3644 res
= Fcons (Fcons (build_string (namebuf
),
3645 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3646 sizeof (struct sockaddr
))),
3653 #endif /* SIOCGIFCONF */
3655 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
3659 const char *flag_sym
;
3662 static const struct ifflag_def ifflag_table
[] = {
3666 #ifdef IFF_BROADCAST
3667 { IFF_BROADCAST
, "broadcast" },
3670 { IFF_DEBUG
, "debug" },
3673 { IFF_LOOPBACK
, "loopback" },
3675 #ifdef IFF_POINTOPOINT
3676 { IFF_POINTOPOINT
, "pointopoint" },
3679 { IFF_RUNNING
, "running" },
3682 { IFF_NOARP
, "noarp" },
3685 { IFF_PROMISC
, "promisc" },
3687 #ifdef IFF_NOTRAILERS
3688 #ifdef NS_IMPL_COCOA
3689 /* Really means smart, notrailers is obsolete */
3690 { IFF_NOTRAILERS
, "smart" },
3692 { IFF_NOTRAILERS
, "notrailers" },
3696 { IFF_ALLMULTI
, "allmulti" },
3699 { IFF_MASTER
, "master" },
3702 { IFF_SLAVE
, "slave" },
3704 #ifdef IFF_MULTICAST
3705 { IFF_MULTICAST
, "multicast" },
3708 { IFF_PORTSEL
, "portsel" },
3710 #ifdef IFF_AUTOMEDIA
3711 { IFF_AUTOMEDIA
, "automedia" },
3714 { IFF_DYNAMIC
, "dynamic" },
3717 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3720 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3723 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3726 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3729 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3734 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3735 doc
: /* Return information about network interface named IFNAME.
3736 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3737 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3738 NETMASK is the layer 3 network mask, HWADDR is the layer 2 address, and
3739 FLAGS is the current flags of the interface. */)
3740 (Lisp_Object ifname
)
3743 Lisp_Object res
= Qnil
;
3747 #if (! (defined SIOCGIFHWADDR && defined HAVE_STRUCT_IFREQ_IFR_HWADDR) \
3748 && defined HAVE_GETIFADDRS && defined LLADDR)
3749 struct ifaddrs
*ifap
;
3752 CHECK_STRING (ifname
);
3754 if (sizeof rq
.ifr_name
<= SBYTES (ifname
))
3755 error ("interface name too long");
3756 strcpy (rq
.ifr_name
, SSDATA (ifname
));
3758 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3763 #if defined (SIOCGIFFLAGS) && defined (HAVE_STRUCT_IFREQ_IFR_FLAGS)
3764 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3766 int flags
= rq
.ifr_flags
;
3767 const struct ifflag_def
*fp
;
3770 /* If flags is smaller than int (i.e. short) it may have the high bit set
3771 due to IFF_MULTICAST. In that case, sign extending it into
3773 if (flags
< 0 && sizeof (rq
.ifr_flags
) < sizeof (flags
))
3774 flags
= (unsigned short) rq
.ifr_flags
;
3777 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3779 if (flags
& fp
->flag_bit
)
3781 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3782 flags
-= fp
->flag_bit
;
3785 for (fnum
= 0; flags
&& fnum
< 32; flags
>>= 1, fnum
++)
3789 elt
= Fcons (make_number (fnum
), elt
);
3794 res
= Fcons (elt
, res
);
3797 #if defined (SIOCGIFHWADDR) && defined (HAVE_STRUCT_IFREQ_IFR_HWADDR)
3798 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3800 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3801 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3805 for (n
= 0; n
< 6; n
++)
3806 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3807 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3809 #elif defined (HAVE_GETIFADDRS) && defined (LLADDR)
3810 if (getifaddrs (&ifap
) != -1)
3812 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3813 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3816 for (it
= ifap
; it
!= NULL
; it
= it
->ifa_next
)
3818 struct sockaddr_dl
*sdl
= (struct sockaddr_dl
*) it
->ifa_addr
;
3819 unsigned char linkaddr
[6];
3822 if (it
->ifa_addr
->sa_family
!= AF_LINK
3823 || strcmp (it
->ifa_name
, SSDATA (ifname
)) != 0
3824 || sdl
->sdl_alen
!= 6)
3827 memcpy (linkaddr
, LLADDR (sdl
), sdl
->sdl_alen
);
3828 for (n
= 0; n
< 6; n
++)
3829 p
->contents
[n
] = make_number (linkaddr
[n
]);
3831 elt
= Fcons (make_number (it
->ifa_addr
->sa_family
), hwaddr
);
3835 #ifdef HAVE_FREEIFADDRS
3839 #endif /* HAVE_GETIFADDRS && LLADDR */
3841 res
= Fcons (elt
, res
);
3844 #if defined (SIOCGIFNETMASK) && (defined (HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined (HAVE_STRUCT_IFREQ_IFR_ADDR))
3845 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3848 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
3849 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3851 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3855 res
= Fcons (elt
, res
);
3858 #if defined (SIOCGIFBRDADDR) && defined (HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3859 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3862 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3865 res
= Fcons (elt
, res
);
3868 #if defined (SIOCGIFADDR) && defined (HAVE_STRUCT_IFREQ_IFR_ADDR)
3869 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3872 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3875 res
= Fcons (elt
, res
);
3879 return any
? res
: Qnil
;
3882 #endif /* defined (HAVE_NET_IF_H) */
3884 /* Turn off input and output for process PROC. */
3887 deactivate_process (Lisp_Object proc
)
3889 register int inchannel
, outchannel
;
3890 register struct Lisp_Process
*p
= XPROCESS (proc
);
3893 /* Delete GnuTLS structures in PROC, if any. */
3894 emacs_gnutls_deinit (proc
);
3895 #endif /* HAVE_GNUTLS */
3897 inchannel
= p
->infd
;
3898 outchannel
= p
->outfd
;
3900 #ifdef ADAPTIVE_READ_BUFFERING
3901 if (p
->read_output_delay
> 0)
3903 if (--process_output_delay_count
< 0)
3904 process_output_delay_count
= 0;
3905 p
->read_output_delay
= 0;
3906 p
->read_output_skip
= 0;
3912 /* Beware SIGCHLD hereabouts. */
3913 flush_pending_output (inchannel
);
3914 emacs_close (inchannel
);
3915 if (outchannel
>= 0 && outchannel
!= inchannel
)
3916 emacs_close (outchannel
);
3920 #ifdef DATAGRAM_SOCKETS
3921 if (DATAGRAM_CHAN_P (inchannel
))
3923 xfree (datagram_address
[inchannel
].sa
);
3924 datagram_address
[inchannel
].sa
= 0;
3925 datagram_address
[inchannel
].len
= 0;
3928 chan_process
[inchannel
] = Qnil
;
3929 FD_CLR (inchannel
, &input_wait_mask
);
3930 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3931 #ifdef NON_BLOCKING_CONNECT
3932 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3934 FD_CLR (inchannel
, &connect_wait_mask
);
3935 FD_CLR (inchannel
, &write_mask
);
3936 if (--num_pending_connects
< 0)
3940 if (inchannel
== max_process_desc
)
3943 /* We just closed the highest-numbered process input descriptor,
3944 so recompute the highest-numbered one now. */
3945 max_process_desc
= 0;
3946 for (i
= 0; i
< MAXDESC
; i
++)
3947 if (!NILP (chan_process
[i
]))
3948 max_process_desc
= i
;
3954 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3956 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3957 It is read into the process' buffers or given to their filter functions.
3958 Non-nil arg PROCESS means do not return until some output has been received
3961 Non-nil second arg SECONDS and third arg MILLISEC are number of seconds
3962 and milliseconds to wait; return after that much time whether or not
3963 there is any subprocess output. If SECONDS is a floating point number,
3964 it specifies a fractional number of seconds to wait.
3965 The MILLISEC argument is obsolete and should be avoided.
3967 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
3968 from PROCESS, suspending reading output from other processes.
3969 If JUST-THIS-ONE is an integer, don't run any timers either.
3970 Return non-nil if we received any output before the timeout expired. */)
3971 (register Lisp_Object process
, Lisp_Object seconds
, Lisp_Object millisec
, Lisp_Object just_this_one
)
3976 if (! NILP (process
))
3977 CHECK_PROCESS (process
);
3979 just_this_one
= Qnil
;
3981 if (!NILP (millisec
))
3982 { /* Obsolete calling convention using integers rather than floats. */
3983 CHECK_NUMBER (millisec
);
3985 seconds
= make_float (XINT (millisec
) / 1000.0);
3988 CHECK_NUMBER (seconds
);
3989 seconds
= make_float (XINT (millisec
) / 1000.0 + XINT (seconds
));
3996 if (!NILP (seconds
))
3998 if (INTEGERP (seconds
))
4000 if (0 < XINT (seconds
))
4002 secs
= XINT (seconds
);
4006 else if (FLOATP (seconds
))
4008 if (0 < XFLOAT_DATA (seconds
))
4010 EMACS_TIME t
= EMACS_TIME_FROM_DOUBLE (XFLOAT_DATA (seconds
));
4011 secs
= min (EMACS_SECS (t
), WAIT_READING_MAX
);
4012 nsecs
= EMACS_NSECS (t
);
4016 wrong_type_argument (Qnumberp
, seconds
);
4018 else if (! NILP (process
))
4022 (wait_reading_process_output (secs
, nsecs
, 0, 0,
4024 !NILP (process
) ? XPROCESS (process
) : NULL
,
4025 NILP (just_this_one
) ? 0 :
4026 !INTEGERP (just_this_one
) ? 1 : -1)
4030 /* Accept a connection for server process SERVER on CHANNEL. */
4032 static int connect_counter
= 0;
4035 server_accept_connection (Lisp_Object server
, int channel
)
4037 Lisp_Object proc
, caller
, name
, buffer
;
4038 Lisp_Object contact
, host
, service
;
4039 struct Lisp_Process
*ps
= XPROCESS (server
);
4040 struct Lisp_Process
*p
;
4044 struct sockaddr_in in
;
4046 struct sockaddr_in6 in6
;
4048 #ifdef HAVE_LOCAL_SOCKETS
4049 struct sockaddr_un un
;
4052 socklen_t len
= sizeof saddr
;
4054 s
= accept (channel
, &saddr
.sa
, &len
);
4063 if (code
== EWOULDBLOCK
)
4067 if (!NILP (ps
->log
))
4068 call3 (ps
->log
, server
, Qnil
,
4069 concat3 (build_string ("accept failed with code"),
4070 Fnumber_to_string (make_number (code
)),
4071 build_string ("\n")));
4077 /* Setup a new process to handle the connection. */
4079 /* Generate a unique identification of the caller, and build contact
4080 information for this process. */
4083 switch (saddr
.sa
.sa_family
)
4087 Lisp_Object args
[5];
4088 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4089 args
[0] = build_string ("%d.%d.%d.%d");
4090 args
[1] = make_number (*ip
++);
4091 args
[2] = make_number (*ip
++);
4092 args
[3] = make_number (*ip
++);
4093 args
[4] = make_number (*ip
++);
4094 host
= Fformat (5, args
);
4095 service
= make_number (ntohs (saddr
.in
.sin_port
));
4097 args
[0] = build_string (" <%s:%d>");
4100 caller
= Fformat (3, args
);
4107 Lisp_Object args
[9];
4108 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4110 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4111 for (i
= 0; i
< 8; i
++)
4112 args
[i
+1] = make_number (ntohs (ip6
[i
]));
4113 host
= Fformat (9, args
);
4114 service
= make_number (ntohs (saddr
.in
.sin_port
));
4116 args
[0] = build_string (" <[%s]:%d>");
4119 caller
= Fformat (3, args
);
4124 #ifdef HAVE_LOCAL_SOCKETS
4128 caller
= Fnumber_to_string (make_number (connect_counter
));
4129 caller
= concat3 (build_string (" <"), caller
, build_string (">"));
4133 /* Create a new buffer name for this process if it doesn't have a
4134 filter. The new buffer name is based on the buffer name or
4135 process name of the server process concatenated with the caller
4138 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4142 buffer
= ps
->buffer
;
4144 buffer
= Fbuffer_name (buffer
);
4149 buffer
= concat2 (buffer
, caller
);
4150 buffer
= Fget_buffer_create (buffer
);
4154 /* Generate a unique name for the new server process. Combine the
4155 server process name with the caller identification. */
4157 name
= concat2 (ps
->name
, caller
);
4158 proc
= make_process (name
);
4160 chan_process
[s
] = proc
;
4163 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4166 fcntl (s
, F_SETFL
, O_NDELAY
);
4170 p
= XPROCESS (proc
);
4172 /* Build new contact information for this setup. */
4173 contact
= Fcopy_sequence (ps
->childp
);
4174 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4175 contact
= Fplist_put (contact
, QChost
, host
);
4176 if (!NILP (service
))
4177 contact
= Fplist_put (contact
, QCservice
, service
);
4178 contact
= Fplist_put (contact
, QCremote
,
4179 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4180 #ifdef HAVE_GETSOCKNAME
4182 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4183 contact
= Fplist_put (contact
, QClocal
,
4184 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4187 pset_childp (p
, contact
);
4188 pset_plist (p
, Fcopy_sequence (ps
->plist
));
4189 pset_type (p
, Qnetwork
);
4191 pset_buffer (p
, buffer
);
4192 pset_sentinel (p
, ps
->sentinel
);
4193 pset_filter (p
, ps
->filter
);
4194 pset_command (p
, Qnil
);
4198 pset_status (p
, Qrun
);
4200 /* Client processes for accepted connections are not stopped initially. */
4201 if (!EQ (p
->filter
, Qt
))
4203 FD_SET (s
, &input_wait_mask
);
4204 FD_SET (s
, &non_keyboard_wait_mask
);
4207 if (s
> max_process_desc
)
4208 max_process_desc
= s
;
4210 /* Setup coding system for new process based on server process.
4211 This seems to be the proper thing to do, as the coding system
4212 of the new process should reflect the settings at the time the
4213 server socket was opened; not the current settings. */
4215 pset_decode_coding_system (p
, ps
->decode_coding_system
);
4216 pset_encode_coding_system (p
, ps
->encode_coding_system
);
4217 setup_process_coding_systems (proc
);
4219 pset_decoding_buf (p
, empty_unibyte_string
);
4220 p
->decoding_carryover
= 0;
4221 pset_encoding_buf (p
, empty_unibyte_string
);
4223 p
->inherit_coding_system_flag
4224 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4226 if (!NILP (ps
->log
))
4227 call3 (ps
->log
, server
, proc
,
4228 concat3 (build_string ("accept from "),
4229 (STRINGP (host
) ? host
: build_string ("-")),
4230 build_string ("\n")));
4232 if (!NILP (p
->sentinel
))
4233 exec_sentinel (proc
,
4234 concat3 (build_string ("open from "),
4235 (STRINGP (host
) ? host
: build_string ("-")),
4236 build_string ("\n")));
4239 /* This variable is different from waiting_for_input in keyboard.c.
4240 It is used to communicate to a lisp process-filter/sentinel (via the
4241 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4242 for user-input when that process-filter was called.
4243 waiting_for_input cannot be used as that is by definition 0 when
4244 lisp code is being evalled.
4245 This is also used in record_asynch_buffer_change.
4246 For that purpose, this must be 0
4247 when not inside wait_reading_process_output. */
4248 static int waiting_for_user_input_p
;
4251 wait_reading_process_output_unwind (Lisp_Object data
)
4253 waiting_for_user_input_p
= XINT (data
);
4257 /* This is here so breakpoints can be put on it. */
4259 wait_reading_process_output_1 (void)
4263 /* Read and dispose of subprocess output while waiting for timeout to
4264 elapse and/or keyboard input to be available.
4268 If negative, gobble data immediately available but don't wait for any.
4271 an additional duration to wait, measured in nanoseconds
4272 If TIME_LIMIT is zero, then:
4273 If NSECS == 0, there is no limit.
4274 If NSECS > 0, the timeout consists of NSECS only.
4275 If NSECS < 0, gobble data immediately, as if TIME_LIMIT were negative.
4278 0 to ignore keyboard input, or
4279 1 to return when input is available, or
4280 -1 meaning caller will actually read the input, so don't throw to
4281 the quit handler, or
4283 DO_DISPLAY means redisplay should be done to show subprocess
4284 output that arrives.
4286 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4287 (and gobble terminal input into the buffer if any arrives).
4289 If WAIT_PROC is specified, wait until something arrives from that
4290 process. The return value is true if we read some input from
4293 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4294 (suspending output from other processes). A negative value
4295 means don't run any timers either.
4297 If WAIT_PROC is specified, then the function returns true if we
4298 received input from that process before the timeout elapsed.
4299 Otherwise, return true if we received input from any process. */
4302 wait_reading_process_output (intmax_t time_limit
, int nsecs
, int read_kbd
,
4304 Lisp_Object wait_for_cell
,
4305 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
4307 register int channel
, nfds
;
4308 SELECT_TYPE Available
;
4309 SELECT_TYPE Writeok
;
4311 int check_delay
, no_avail
;
4314 EMACS_TIME timeout
, end_time
;
4315 int wait_channel
= -1;
4316 int got_some_input
= 0;
4317 ptrdiff_t count
= SPECPDL_INDEX ();
4319 FD_ZERO (&Available
);
4322 if (time_limit
== 0 && nsecs
== 0 && wait_proc
&& !NILP (Vinhibit_quit
)
4323 && !(CONSP (wait_proc
->status
)
4324 && EQ (XCAR (wait_proc
->status
), Qexit
)))
4325 message ("Blocking call to accept-process-output with quit inhibited!!");
4327 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4328 if (wait_proc
!= NULL
)
4329 wait_channel
= wait_proc
->infd
;
4331 record_unwind_protect (wait_reading_process_output_unwind
,
4332 make_number (waiting_for_user_input_p
));
4333 waiting_for_user_input_p
= read_kbd
;
4340 else if (TYPE_MAXIMUM (time_t) < time_limit
)
4341 time_limit
= TYPE_MAXIMUM (time_t);
4343 /* Since we may need to wait several times,
4344 compute the absolute time to return at. */
4345 if (time_limit
|| 0 < nsecs
)
4347 timeout
= make_emacs_time (time_limit
, nsecs
);
4348 end_time
= add_emacs_time (current_emacs_time (), timeout
);
4353 /* If calling from keyboard input, do not quit
4354 since we want to return C-g as an input character.
4355 Otherwise, do pending quit if requested. */
4358 else if (pending_signals
)
4359 process_pending_signals ();
4361 /* Exit now if the cell we're waiting for became non-nil. */
4362 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4365 /* Compute time from now till when time limit is up */
4366 /* Exit if already run out */
4369 /* A negative timeout means
4370 gobble output available now
4371 but don't wait at all. */
4373 timeout
= make_emacs_time (0, 0);
4375 else if (time_limit
|| 0 < nsecs
)
4377 EMACS_TIME now
= current_emacs_time ();
4378 if (EMACS_TIME_LE (end_time
, now
))
4380 timeout
= sub_emacs_time (end_time
, now
);
4384 timeout
= make_emacs_time (100000, 0);
4387 /* Normally we run timers here.
4388 But not if wait_for_cell; in those cases,
4389 the wait is supposed to be short,
4390 and those callers cannot handle running arbitrary Lisp code here. */
4391 if (NILP (wait_for_cell
)
4392 && just_wait_proc
>= 0)
4394 EMACS_TIME timer_delay
;
4398 unsigned old_timers_run
= timers_run
;
4399 struct buffer
*old_buffer
= current_buffer
;
4400 Lisp_Object old_window
= selected_window
;
4402 timer_delay
= timer_check ();
4404 /* If a timer has run, this might have changed buffers
4405 an alike. Make read_key_sequence aware of that. */
4406 if (timers_run
!= old_timers_run
4407 && (old_buffer
!= current_buffer
4408 || !EQ (old_window
, selected_window
))
4409 && waiting_for_user_input_p
== -1)
4410 record_asynch_buffer_change ();
4412 if (timers_run
!= old_timers_run
&& do_display
)
4413 /* We must retry, since a timer may have requeued itself
4414 and that could alter the time_delay. */
4415 redisplay_preserve_echo_area (9);
4419 while (!detect_input_pending ());
4421 /* If there is unread keyboard input, also return. */
4423 && requeued_events_pending_p ())
4426 /* A negative timeout means do not wait at all. */
4429 if (EMACS_TIME_VALID_P (timer_delay
))
4431 if (EMACS_TIME_LT (timer_delay
, timeout
))
4432 timeout
= timer_delay
;
4436 /* This is so a breakpoint can be put here. */
4437 wait_reading_process_output_1 ();
4442 /* Cause C-g and alarm signals to take immediate action,
4443 and cause input available signals to zero out timeout.
4445 It is important that we do this before checking for process
4446 activity. If we get a SIGCHLD after the explicit checks for
4447 process activity, timeout is the only way we will know. */
4449 set_waiting_for_input (&timeout
);
4451 /* If status of something has changed, and no input is
4452 available, notify the user of the change right away. After
4453 this explicit check, we'll let the SIGCHLD handler zap
4454 timeout to get our attention. */
4455 if (update_tick
!= process_tick
)
4460 if (kbd_on_hold_p ())
4463 Atemp
= input_wait_mask
;
4466 timeout
= make_emacs_time (0, 0);
4467 if ((pselect (max (max_process_desc
, max_input_desc
) + 1,
4469 #ifdef NON_BLOCKING_CONNECT
4470 (num_pending_connects
> 0 ? &Ctemp
: NULL
),
4474 NULL
, &timeout
, NULL
)
4477 /* It's okay for us to do this and then continue with
4478 the loop, since timeout has already been zeroed out. */
4479 clear_waiting_for_input ();
4480 status_notify (NULL
);
4481 if (do_display
) redisplay_preserve_echo_area (13);
4485 /* Don't wait for output from a non-running process. Just
4486 read whatever data has already been received. */
4487 if (wait_proc
&& wait_proc
->raw_status_new
)
4488 update_status (wait_proc
);
4490 && ! EQ (wait_proc
->status
, Qrun
)
4491 && ! EQ (wait_proc
->status
, Qconnect
))
4493 int nread
, total_nread
= 0;
4495 clear_waiting_for_input ();
4496 XSETPROCESS (proc
, wait_proc
);
4498 /* Read data from the process, until we exhaust it. */
4499 while (wait_proc
->infd
>= 0)
4501 nread
= read_process_output (proc
, wait_proc
->infd
);
4508 total_nread
+= nread
;
4512 else if (nread
== -1 && EIO
== errno
)
4516 else if (nread
== -1 && EAGAIN
== errno
)
4520 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4524 if (total_nread
> 0 && do_display
)
4525 redisplay_preserve_echo_area (10);
4530 /* Wait till there is something to do */
4532 if (wait_proc
&& just_wait_proc
)
4534 if (wait_proc
->infd
< 0) /* Terminated */
4536 FD_SET (wait_proc
->infd
, &Available
);
4540 else if (!NILP (wait_for_cell
))
4542 Available
= non_process_wait_mask
;
4549 Available
= non_keyboard_wait_mask
;
4551 Available
= input_wait_mask
;
4552 Writeok
= write_mask
;
4553 #ifdef SELECT_CANT_DO_WRITE_MASK
4558 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4561 /* If frame size has changed or the window is newly mapped,
4562 redisplay now, before we start to wait. There is a race
4563 condition here; if a SIGIO arrives between now and the select
4564 and indicates that a frame is trashed, the select may block
4565 displaying a trashed screen. */
4566 if (frame_garbaged
&& do_display
)
4568 clear_waiting_for_input ();
4569 redisplay_preserve_echo_area (11);
4571 set_waiting_for_input (&timeout
);
4574 /* Skip the `select' call if input is available and we're
4575 waiting for keyboard input or a cell change (which can be
4576 triggered by processing X events). In the latter case, set
4577 nfds to 1 to avoid breaking the loop. */
4579 if ((read_kbd
|| !NILP (wait_for_cell
))
4580 && detect_input_pending ())
4582 nfds
= read_kbd
? 0 : 1;
4589 #ifdef ADAPTIVE_READ_BUFFERING
4590 /* Set the timeout for adaptive read buffering if any
4591 process has non-zero read_output_skip and non-zero
4592 read_output_delay, and we are not reading output for a
4593 specific wait_channel. It is not executed if
4594 Vprocess_adaptive_read_buffering is nil. */
4595 if (process_output_skip
&& check_delay
> 0)
4597 int nsecs
= EMACS_NSECS (timeout
);
4598 if (EMACS_SECS (timeout
) > 0 || nsecs
> READ_OUTPUT_DELAY_MAX
)
4599 nsecs
= READ_OUTPUT_DELAY_MAX
;
4600 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4602 proc
= chan_process
[channel
];
4605 /* Find minimum non-zero read_output_delay among the
4606 processes with non-zero read_output_skip. */
4607 if (XPROCESS (proc
)->read_output_delay
> 0)
4610 if (!XPROCESS (proc
)->read_output_skip
)
4612 FD_CLR (channel
, &Available
);
4613 XPROCESS (proc
)->read_output_skip
= 0;
4614 if (XPROCESS (proc
)->read_output_delay
< nsecs
)
4615 nsecs
= XPROCESS (proc
)->read_output_delay
;
4618 timeout
= make_emacs_time (0, nsecs
);
4619 process_output_skip
= 0;
4623 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
4625 #elif defined (HAVE_NS)
4630 (max (max_process_desc
, max_input_desc
) + 1,
4632 (check_write
? &Writeok
: (SELECT_TYPE
*)0),
4633 NULL
, &timeout
, NULL
);
4636 /* GnuTLS buffers data internally. In lowat mode it leaves
4637 some data in the TCP buffers so that select works, but
4638 with custom pull/push functions we need to check if some
4639 data is available in the buffers manually. */
4644 /* We're not waiting on a specific process, so loop
4645 through all the channels and check for data.
4646 This is a workaround needed for some versions of
4647 the gnutls library -- 2.12.14 has been confirmed
4649 http://comments.gmane.org/gmane.emacs.devel/145074 */
4650 for (channel
= 0; channel
< MAXDESC
; ++channel
)
4651 if (! NILP (chan_process
[channel
]))
4653 struct Lisp_Process
*p
=
4654 XPROCESS (chan_process
[channel
]);
4655 if (p
&& p
->gnutls_p
&& p
->infd
4656 && ((emacs_gnutls_record_check_pending
4661 FD_SET (p
->infd
, &Available
);
4667 /* Check this specific channel. */
4668 if (wait_proc
->gnutls_p
/* Check for valid process. */
4669 /* Do we have pending data? */
4670 && ((emacs_gnutls_record_check_pending
4671 (wait_proc
->gnutls_state
))
4675 /* Set to Available. */
4676 FD_SET (wait_proc
->infd
, &Available
);
4685 /* Make C-g and alarm signals set flags again */
4686 clear_waiting_for_input ();
4688 /* If we woke up due to SIGWINCH, actually change size now. */
4689 do_pending_window_change (0);
4691 /* We used to break here if nfds == 0, i.e. we seemed to have
4692 waited the full period. But apparently if Emacs receives
4693 SIGIO between set_waiting_for_input and select, select can
4694 return with nfds == 0 due to the timeout being zeroed out by
4695 the signal handler (Bug#11536). */
4699 if (xerrno
== EINTR
)
4701 else if (xerrno
== EBADF
)
4704 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4705 the child's closure of the pts gives the parent a SIGHUP, and
4706 the ptc file descriptor is automatically closed,
4707 yielding EBADF here or at select() call above.
4708 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4709 in m/ibmrt-aix.h), and here we just ignore the select error.
4710 Cleanup occurs c/o status_notify after SIGCLD. */
4711 no_avail
= 1; /* Cannot depend on values returned */
4717 error ("select error: %s", emacs_strerror (xerrno
));
4722 FD_ZERO (&Available
);
4726 /* Check for keyboard input */
4727 /* If there is any, return immediately
4728 to give it higher priority than subprocesses */
4732 unsigned old_timers_run
= timers_run
;
4733 struct buffer
*old_buffer
= current_buffer
;
4734 Lisp_Object old_window
= selected_window
;
4737 if (detect_input_pending_run_timers (do_display
))
4739 swallow_events (do_display
);
4740 if (detect_input_pending_run_timers (do_display
))
4744 /* If a timer has run, this might have changed buffers
4745 an alike. Make read_key_sequence aware of that. */
4746 if (timers_run
!= old_timers_run
4747 && waiting_for_user_input_p
== -1
4748 && (old_buffer
!= current_buffer
4749 || !EQ (old_window
, selected_window
)))
4750 record_asynch_buffer_change ();
4756 /* If there is unread keyboard input, also return. */
4758 && requeued_events_pending_p ())
4761 /* If we are not checking for keyboard input now,
4762 do process events (but don't run any timers).
4763 This is so that X events will be processed.
4764 Otherwise they may have to wait until polling takes place.
4765 That would causes delays in pasting selections, for example.
4767 (We used to do this only if wait_for_cell.) */
4768 if (read_kbd
== 0 && detect_input_pending ())
4770 swallow_events (do_display
);
4771 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4772 if (detect_input_pending ())
4777 /* Exit now if the cell we're waiting for became non-nil. */
4778 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4782 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4783 go read it. This can happen with X on BSD after logging out.
4784 In that case, there really is no input and no SIGIO,
4785 but select says there is input. */
4787 if (read_kbd
&& interrupt_input
4788 && keyboard_bit_set (&Available
) && ! noninteractive
)
4789 handle_input_available_signal (SIGIO
);
4793 got_some_input
|= nfds
> 0;
4795 /* If checking input just got us a size-change event from X,
4796 obey it now if we should. */
4797 if (read_kbd
|| ! NILP (wait_for_cell
))
4798 do_pending_window_change (0);
4800 /* Check for data from a process. */
4801 if (no_avail
|| nfds
== 0)
4804 for (channel
= 0; channel
<= max_input_desc
; ++channel
)
4806 struct fd_callback_data
*d
= &fd_callback_info
[channel
];
4808 && ((d
->condition
& FOR_READ
4809 && FD_ISSET (channel
, &Available
))
4810 || (d
->condition
& FOR_WRITE
4811 && FD_ISSET (channel
, &write_mask
))))
4812 d
->func (channel
, d
->data
);
4815 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4817 if (FD_ISSET (channel
, &Available
)
4818 && FD_ISSET (channel
, &non_keyboard_wait_mask
)
4819 && !FD_ISSET (channel
, &non_process_wait_mask
))
4823 /* If waiting for this channel, arrange to return as
4824 soon as no more input to be processed. No more
4826 if (wait_channel
== channel
)
4832 proc
= chan_process
[channel
];
4836 /* If this is a server stream socket, accept connection. */
4837 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4839 server_accept_connection (proc
, channel
);
4843 /* Read data from the process, starting with our
4844 buffered-ahead character if we have one. */
4846 nread
= read_process_output (proc
, channel
);
4849 /* Since read_process_output can run a filter,
4850 which can call accept-process-output,
4851 don't try to read from any other processes
4852 before doing the select again. */
4853 FD_ZERO (&Available
);
4856 redisplay_preserve_echo_area (12);
4859 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4862 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4863 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4865 else if (nread
== -1 && errno
== EAGAIN
)
4869 else if (nread
== -1 && errno
== EAGAIN
)
4871 /* Note that we cannot distinguish between no input
4872 available now and a closed pipe.
4873 With luck, a closed pipe will be accompanied by
4874 subprocess termination and SIGCHLD. */
4875 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4877 #endif /* O_NDELAY */
4878 #endif /* O_NONBLOCK */
4880 /* On some OSs with ptys, when the process on one end of
4881 a pty exits, the other end gets an error reading with
4882 errno = EIO instead of getting an EOF (0 bytes read).
4883 Therefore, if we get an error reading and errno =
4884 EIO, just continue, because the child process has
4885 exited and should clean itself up soon (e.g. when we
4888 However, it has been known to happen that the SIGCHLD
4889 got lost. So raise the signal again just in case.
4891 else if (nread
== -1 && errno
== EIO
)
4893 struct Lisp_Process
*p
= XPROCESS (proc
);
4895 /* Clear the descriptor now, so we only raise the
4897 FD_CLR (channel
, &input_wait_mask
);
4898 FD_CLR (channel
, &non_keyboard_wait_mask
);
4902 /* If the EIO occurs on a pty, the SIGCHLD handler's
4903 waitpid call will not find the process object to
4904 delete. Do it here. */
4905 p
->tick
= ++process_tick
;
4906 pset_status (p
, Qfailed
);
4909 handle_child_signal (SIGCHLD
);
4911 #endif /* HAVE_PTYS */
4912 /* If we can detect process termination, don't consider the
4913 process gone just because its pipe is closed. */
4915 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4920 /* Preserve status of processes already terminated. */
4921 XPROCESS (proc
)->tick
= ++process_tick
;
4922 deactivate_process (proc
);
4923 if (XPROCESS (proc
)->raw_status_new
)
4924 update_status (XPROCESS (proc
));
4925 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4926 pset_status (XPROCESS (proc
),
4927 list2 (Qexit
, make_number (256)));
4930 #ifdef NON_BLOCKING_CONNECT
4931 if (FD_ISSET (channel
, &Writeok
)
4932 && FD_ISSET (channel
, &connect_wait_mask
))
4934 struct Lisp_Process
*p
;
4936 FD_CLR (channel
, &connect_wait_mask
);
4937 FD_CLR (channel
, &write_mask
);
4938 if (--num_pending_connects
< 0)
4941 proc
= chan_process
[channel
];
4945 p
= XPROCESS (proc
);
4948 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4949 So only use it on systems where it is known to work. */
4951 socklen_t xlen
= sizeof (xerrno
);
4952 if (getsockopt (channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4957 struct sockaddr pname
;
4958 int pnamelen
= sizeof (pname
);
4960 /* If connection failed, getpeername will fail. */
4962 if (getpeername (channel
, &pname
, &pnamelen
) < 0)
4964 /* Obtain connect failure code through error slippage. */
4967 if (errno
== ENOTCONN
&& read (channel
, &dummy
, 1) < 0)
4974 p
->tick
= ++process_tick
;
4975 pset_status (p
, list2 (Qfailed
, make_number (xerrno
)));
4976 deactivate_process (proc
);
4980 pset_status (p
, Qrun
);
4981 /* Execute the sentinel here. If we had relied on
4982 status_notify to do it later, it will read input
4983 from the process before calling the sentinel. */
4984 exec_sentinel (proc
, build_string ("open\n"));
4985 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4987 FD_SET (p
->infd
, &input_wait_mask
);
4988 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
4992 #endif /* NON_BLOCKING_CONNECT */
4993 } /* end for each file descriptor */
4994 } /* end while exit conditions not met */
4996 unbind_to (count
, Qnil
);
4998 /* If calling from keyboard input, do not quit
4999 since we want to return C-g as an input character.
5000 Otherwise, do pending quit if requested. */
5003 /* Prevent input_pending from remaining set if we quit. */
5004 clear_input_pending ();
5008 return got_some_input
;
5011 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
5014 read_process_output_call (Lisp_Object fun_and_args
)
5016 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
5020 read_process_output_error_handler (Lisp_Object error_val
)
5022 cmd_error_internal (error_val
, "error in process filter: ");
5024 update_echo_area ();
5025 Fsleep_for (make_number (2), Qnil
);
5029 /* Read pending output from the process channel,
5030 starting with our buffered-ahead character if we have one.
5031 Yield number of decoded characters read.
5033 This function reads at most 4096 characters.
5034 If you want to read all available subprocess output,
5035 you must call it repeatedly until it returns zero.
5037 The characters read are decoded according to PROC's coding-system
5041 read_process_output (Lisp_Object proc
, register int channel
)
5043 register ssize_t nbytes
;
5045 register Lisp_Object outstream
;
5046 register struct Lisp_Process
*p
= XPROCESS (proc
);
5047 register ptrdiff_t opoint
;
5048 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5049 int carryover
= p
->decoding_carryover
;
5051 ptrdiff_t count
= SPECPDL_INDEX ();
5052 Lisp_Object odeactivate
;
5054 chars
= alloca (carryover
+ readmax
);
5056 /* See the comment above. */
5057 memcpy (chars
, SDATA (p
->decoding_buf
), carryover
);
5059 #ifdef DATAGRAM_SOCKETS
5060 /* We have a working select, so proc_buffered_char is always -1. */
5061 if (DATAGRAM_CHAN_P (channel
))
5063 socklen_t len
= datagram_address
[channel
].len
;
5064 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5065 0, datagram_address
[channel
].sa
, &len
);
5070 int buffered
= 0 <= proc_buffered_char
[channel
];
5073 chars
[carryover
] = proc_buffered_char
[channel
];
5074 proc_buffered_char
[channel
] = -1;
5078 nbytes
= emacs_gnutls_read (p
, chars
+ carryover
+ buffered
,
5079 readmax
- buffered
);
5082 nbytes
= emacs_read (channel
, chars
+ carryover
+ buffered
,
5083 readmax
- buffered
);
5084 #ifdef ADAPTIVE_READ_BUFFERING
5085 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5087 int delay
= p
->read_output_delay
;
5090 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5093 process_output_delay_count
++;
5094 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5097 else if (delay
> 0 && nbytes
== readmax
- buffered
)
5099 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5101 process_output_delay_count
--;
5103 p
->read_output_delay
= delay
;
5106 p
->read_output_skip
= 1;
5107 process_output_skip
= 1;
5112 nbytes
+= buffered
&& nbytes
<= 0;
5115 p
->decoding_carryover
= 0;
5117 /* At this point, NBYTES holds number of bytes just received
5118 (including the one in proc_buffered_char[channel]). */
5121 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5123 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5126 /* Now set NBYTES how many bytes we must decode. */
5127 nbytes
+= carryover
;
5129 odeactivate
= Vdeactivate_mark
;
5130 /* There's no good reason to let process filters change the current
5131 buffer, and many callers of accept-process-output, sit-for, and
5132 friends don't expect current-buffer to be changed from under them. */
5133 record_unwind_current_buffer ();
5135 /* Read and dispose of the process output. */
5136 outstream
= p
->filter
;
5137 if (!NILP (outstream
))
5140 bool outer_running_asynch_code
= running_asynch_code
;
5141 int waiting
= waiting_for_user_input_p
;
5143 /* No need to gcpro these, because all we do with them later
5144 is test them for EQness, and none of them should be a string. */
5146 Lisp_Object obuffer
, okeymap
;
5147 XSETBUFFER (obuffer
, current_buffer
);
5148 okeymap
= BVAR (current_buffer
, keymap
);
5151 /* We inhibit quit here instead of just catching it so that
5152 hitting ^G when a filter happens to be running won't screw
5154 specbind (Qinhibit_quit
, Qt
);
5155 specbind (Qlast_nonmenu_event
, Qt
);
5157 /* In case we get recursively called,
5158 and we already saved the match data nonrecursively,
5159 save the same match data in safely recursive fashion. */
5160 if (outer_running_asynch_code
)
5163 /* Don't clobber the CURRENT match data, either! */
5164 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5165 restore_search_regs ();
5166 record_unwind_save_match_data ();
5167 Fset_match_data (tem
, Qt
);
5170 /* For speed, if a search happens within this code,
5171 save the match data in a special nonrecursive fashion. */
5172 running_asynch_code
= 1;
5174 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5175 text
= coding
->dst_object
;
5176 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5177 /* A new coding system might be found. */
5178 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5180 pset_decode_coding_system (p
, Vlast_coding_system_used
);
5182 /* Don't call setup_coding_system for
5183 proc_decode_coding_system[channel] here. It is done in
5184 detect_coding called via decode_coding above. */
5186 /* If a coding system for encoding is not yet decided, we set
5187 it as the same as coding-system for decoding.
5189 But, before doing that we must check if
5190 proc_encode_coding_system[p->outfd] surely points to a
5191 valid memory because p->outfd will be changed once EOF is
5192 sent to the process. */
5193 if (NILP (p
->encode_coding_system
)
5194 && proc_encode_coding_system
[p
->outfd
])
5196 pset_encode_coding_system
5197 (p
, coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
));
5198 setup_coding_system (p
->encode_coding_system
,
5199 proc_encode_coding_system
[p
->outfd
]);
5203 if (coding
->carryover_bytes
> 0)
5205 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5206 pset_decoding_buf (p
, make_uninit_string (coding
->carryover_bytes
));
5207 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5208 coding
->carryover_bytes
);
5209 p
->decoding_carryover
= coding
->carryover_bytes
;
5211 if (SBYTES (text
) > 0)
5212 /* FIXME: It's wrong to wrap or not based on debug-on-error, and
5213 sometimes it's simply wrong to wrap (e.g. when called from
5214 accept-process-output). */
5215 internal_condition_case_1 (read_process_output_call
,
5217 Fcons (proc
, Fcons (text
, Qnil
))),
5218 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5219 read_process_output_error_handler
);
5221 /* If we saved the match data nonrecursively, restore it now. */
5222 restore_search_regs ();
5223 running_asynch_code
= outer_running_asynch_code
;
5225 /* Restore waiting_for_user_input_p as it was
5226 when we were called, in case the filter clobbered it. */
5227 waiting_for_user_input_p
= waiting
;
5229 #if 0 /* Call record_asynch_buffer_change unconditionally,
5230 because we might have changed minor modes or other things
5231 that affect key bindings. */
5232 if (! EQ (Fcurrent_buffer (), obuffer
)
5233 || ! EQ (current_buffer
->keymap
, okeymap
))
5235 /* But do it only if the caller is actually going to read events.
5236 Otherwise there's no need to make him wake up, and it could
5237 cause trouble (for example it would make sit_for return). */
5238 if (waiting_for_user_input_p
== -1)
5239 record_asynch_buffer_change ();
5242 /* If no filter, write into buffer if it isn't dead. */
5243 else if (!NILP (p
->buffer
) && BUFFER_LIVE_P (XBUFFER (p
->buffer
)))
5245 Lisp_Object old_read_only
;
5246 ptrdiff_t old_begv
, old_zv
;
5247 ptrdiff_t old_begv_byte
, old_zv_byte
;
5248 ptrdiff_t before
, before_byte
;
5249 ptrdiff_t opoint_byte
;
5253 Fset_buffer (p
->buffer
);
5255 opoint_byte
= PT_BYTE
;
5256 old_read_only
= BVAR (current_buffer
, read_only
);
5259 old_begv_byte
= BEGV_BYTE
;
5260 old_zv_byte
= ZV_BYTE
;
5262 bset_read_only (current_buffer
, Qnil
);
5264 /* Insert new output into buffer
5265 at the current end-of-output marker,
5266 thus preserving logical ordering of input and output. */
5267 if (XMARKER (p
->mark
)->buffer
)
5268 SET_PT_BOTH (clip_to_bounds (BEGV
,
5269 marker_position (p
->mark
), ZV
),
5270 clip_to_bounds (BEGV_BYTE
,
5271 marker_byte_position (p
->mark
),
5274 SET_PT_BOTH (ZV
, ZV_BYTE
);
5276 before_byte
= PT_BYTE
;
5278 /* If the output marker is outside of the visible region, save
5279 the restriction and widen. */
5280 if (! (BEGV
<= PT
&& PT
<= ZV
))
5283 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5284 text
= coding
->dst_object
;
5285 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5286 /* A new coding system might be found. See the comment in the
5287 similar code in the previous `if' block. */
5288 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5290 pset_decode_coding_system (p
, Vlast_coding_system_used
);
5291 if (NILP (p
->encode_coding_system
)
5292 && proc_encode_coding_system
[p
->outfd
])
5294 pset_encode_coding_system
5295 (p
, coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
));
5296 setup_coding_system (p
->encode_coding_system
,
5297 proc_encode_coding_system
[p
->outfd
]);
5300 if (coding
->carryover_bytes
> 0)
5302 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5303 pset_decoding_buf (p
, make_uninit_string (coding
->carryover_bytes
));
5304 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5305 coding
->carryover_bytes
);
5306 p
->decoding_carryover
= coding
->carryover_bytes
;
5308 /* Adjust the multibyteness of TEXT to that of the buffer. */
5309 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
5310 != ! STRING_MULTIBYTE (text
))
5311 text
= (STRING_MULTIBYTE (text
)
5312 ? Fstring_as_unibyte (text
)
5313 : Fstring_to_multibyte (text
));
5314 /* Insert before markers in case we are inserting where
5315 the buffer's mark is, and the user's next command is Meta-y. */
5316 insert_from_string_before_markers (text
, 0, 0,
5317 SCHARS (text
), SBYTES (text
), 0);
5319 /* Make sure the process marker's position is valid when the
5320 process buffer is changed in the signal_after_change above.
5321 W3 is known to do that. */
5322 if (BUFFERP (p
->buffer
)
5323 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5324 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5326 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5328 update_mode_lines
++;
5330 /* Make sure opoint and the old restrictions
5331 float ahead of any new text just as point would. */
5332 if (opoint
>= before
)
5334 opoint
+= PT
- before
;
5335 opoint_byte
+= PT_BYTE
- before_byte
;
5337 if (old_begv
> before
)
5339 old_begv
+= PT
- before
;
5340 old_begv_byte
+= PT_BYTE
- before_byte
;
5342 if (old_zv
>= before
)
5344 old_zv
+= PT
- before
;
5345 old_zv_byte
+= PT_BYTE
- before_byte
;
5348 /* If the restriction isn't what it should be, set it. */
5349 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5350 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5353 bset_read_only (current_buffer
, old_read_only
);
5354 SET_PT_BOTH (opoint
, opoint_byte
);
5356 /* Handling the process output should not deactivate the mark. */
5357 Vdeactivate_mark
= odeactivate
;
5359 unbind_to (count
, Qnil
);
5363 /* Sending data to subprocess */
5365 /* In send_process, when a write fails temporarily,
5366 wait_reading_process_output is called. It may execute user code,
5367 e.g. timers, that attempts to write new data to the same process.
5368 We must ensure that data is sent in the right order, and not
5369 interspersed half-completed with other writes (Bug#10815). This is
5370 handled by the write_queue element of struct process. It is a list
5371 with each entry having the form
5373 (string . (offset . length))
5375 where STRING is a lisp string, OFFSET is the offset into the
5376 string's byte sequence from which we should begin to send, and
5377 LENGTH is the number of bytes left to send. */
5379 /* Create a new entry in write_queue.
5380 INPUT_OBJ should be a buffer, string Qt, or Qnil.
5381 BUF is a pointer to the string sequence of the input_obj or a C
5382 string in case of Qt or Qnil. */
5385 write_queue_push (struct Lisp_Process
*p
, Lisp_Object input_obj
,
5386 const char *buf
, ptrdiff_t len
, int front
)
5389 Lisp_Object entry
, obj
;
5391 if (STRINGP (input_obj
))
5393 offset
= buf
- SSDATA (input_obj
);
5399 obj
= make_unibyte_string (buf
, len
);
5402 entry
= Fcons (obj
, Fcons (make_number (offset
), make_number (len
)));
5405 pset_write_queue (p
, Fcons (entry
, p
->write_queue
));
5407 pset_write_queue (p
, nconc2 (p
->write_queue
, Fcons (entry
, Qnil
)));
5410 /* Remove the first element in the write_queue of process P, put its
5411 contents in OBJ, BUF and LEN, and return non-zero. If the
5412 write_queue is empty, return zero. */
5415 write_queue_pop (struct Lisp_Process
*p
, Lisp_Object
*obj
,
5416 const char **buf
, ptrdiff_t *len
)
5418 Lisp_Object entry
, offset_length
;
5421 if (NILP (p
->write_queue
))
5424 entry
= XCAR (p
->write_queue
);
5425 pset_write_queue (p
, XCDR (p
->write_queue
));
5427 *obj
= XCAR (entry
);
5428 offset_length
= XCDR (entry
);
5430 *len
= XINT (XCDR (offset_length
));
5431 offset
= XINT (XCAR (offset_length
));
5432 *buf
= SSDATA (*obj
) + offset
;
5437 /* Send some data to process PROC.
5438 BUF is the beginning of the data; LEN is the number of characters.
5439 OBJECT is the Lisp object that the data comes from. If OBJECT is
5440 nil or t, it means that the data comes from C string.
5442 If OBJECT is not nil, the data is encoded by PROC's coding-system
5443 for encoding before it is sent.
5445 This function can evaluate Lisp code and can garbage collect. */
5448 send_process (Lisp_Object proc
, const char *buf
, ptrdiff_t len
,
5451 struct Lisp_Process
*p
= XPROCESS (proc
);
5453 struct coding_system
*coding
;
5455 if (p
->raw_status_new
)
5457 if (! EQ (p
->status
, Qrun
))
5458 error ("Process %s not running", SDATA (p
->name
));
5460 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5462 coding
= proc_encode_coding_system
[p
->outfd
];
5463 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5465 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5466 || (BUFFERP (object
)
5467 && !NILP (BVAR (XBUFFER (object
), enable_multibyte_characters
)))
5470 pset_encode_coding_system
5471 (p
, complement_process_encoding_system (p
->encode_coding_system
));
5472 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
5474 /* The coding system for encoding was changed to raw-text
5475 because we sent a unibyte text previously. Now we are
5476 sending a multibyte text, thus we must encode it by the
5477 original coding system specified for the current process.
5479 Another reason we come here is that the coding system
5480 was just complemented and a new one was returned by
5481 complement_process_encoding_system. */
5482 setup_coding_system (p
->encode_coding_system
, coding
);
5483 Vlast_coding_system_used
= p
->encode_coding_system
;
5485 coding
->src_multibyte
= 1;
5489 coding
->src_multibyte
= 0;
5490 /* For sending a unibyte text, character code conversion should
5491 not take place but EOL conversion should. So, setup raw-text
5492 or one of the subsidiary if we have not yet done it. */
5493 if (CODING_REQUIRE_ENCODING (coding
))
5495 if (CODING_REQUIRE_FLUSHING (coding
))
5497 /* But, before changing the coding, we must flush out data. */
5498 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5499 send_process (proc
, "", 0, Qt
);
5500 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
5502 setup_coding_system (raw_text_coding_system
5503 (Vlast_coding_system_used
),
5505 coding
->src_multibyte
= 0;
5508 coding
->dst_multibyte
= 0;
5510 if (CODING_REQUIRE_ENCODING (coding
))
5512 coding
->dst_object
= Qt
;
5513 if (BUFFERP (object
))
5515 ptrdiff_t from_byte
, from
, to
;
5516 ptrdiff_t save_pt
, save_pt_byte
;
5517 struct buffer
*cur
= current_buffer
;
5519 set_buffer_internal (XBUFFER (object
));
5520 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
5522 from_byte
= PTR_BYTE_POS ((unsigned char *) buf
);
5523 from
= BYTE_TO_CHAR (from_byte
);
5524 to
= BYTE_TO_CHAR (from_byte
+ len
);
5525 TEMP_SET_PT_BOTH (from
, from_byte
);
5526 encode_coding_object (coding
, object
, from
, from_byte
,
5527 to
, from_byte
+ len
, Qt
);
5528 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
5529 set_buffer_internal (cur
);
5531 else if (STRINGP (object
))
5533 encode_coding_object (coding
, object
, 0, 0, SCHARS (object
),
5534 SBYTES (object
), Qt
);
5538 coding
->dst_object
= make_unibyte_string (buf
, len
);
5539 coding
->produced
= len
;
5542 len
= coding
->produced
;
5543 object
= coding
->dst_object
;
5544 buf
= SSDATA (object
);
5547 if (pty_max_bytes
== 0)
5549 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5550 pty_max_bytes
= fpathconf (p
->outfd
, _PC_MAX_CANON
);
5551 if (pty_max_bytes
< 0)
5552 pty_max_bytes
= 250;
5554 pty_max_bytes
= 250;
5556 /* Deduct one, to leave space for the eof. */
5560 /* If there is already data in the write_queue, put the new data
5561 in the back of queue. Otherwise, ignore it. */
5562 if (!NILP (p
->write_queue
))
5563 write_queue_push (p
, object
, buf
, len
, 0);
5565 do /* while !NILP (p->write_queue) */
5567 ptrdiff_t cur_len
= -1;
5568 const char *cur_buf
;
5569 Lisp_Object cur_object
;
5571 /* If write_queue is empty, ignore it. */
5572 if (!write_queue_pop (p
, &cur_object
, &cur_buf
, &cur_len
))
5576 cur_object
= object
;
5581 /* Send this batch, using one or more write calls. */
5582 ptrdiff_t written
= 0;
5583 int outfd
= p
->outfd
;
5584 #ifdef DATAGRAM_SOCKETS
5585 if (DATAGRAM_CHAN_P (outfd
))
5587 rv
= sendto (outfd
, cur_buf
, cur_len
,
5588 0, datagram_address
[outfd
].sa
,
5589 datagram_address
[outfd
].len
);
5592 else if (errno
== EMSGSIZE
)
5593 report_file_error ("sending datagram", Fcons (proc
, Qnil
));
5600 written
= emacs_gnutls_write (p
, cur_buf
, cur_len
);
5603 written
= emacs_write (outfd
, cur_buf
, cur_len
);
5604 rv
= (written
? 0 : -1);
5605 #ifdef ADAPTIVE_READ_BUFFERING
5606 if (p
->read_output_delay
> 0
5607 && p
->adaptive_read_buffering
== 1)
5609 p
->read_output_delay
= 0;
5610 process_output_delay_count
--;
5611 p
->read_output_skip
= 0;
5620 || errno
== EWOULDBLOCK
5626 /* Buffer is full. Wait, accepting input;
5627 that may allow the program
5628 to finish doing output and read more. */
5630 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5631 /* A gross hack to work around a bug in FreeBSD.
5632 In the following sequence, read(2) returns
5636 write(2) 954 bytes, get EAGAIN
5637 read(2) 1024 bytes in process_read_output
5638 read(2) 11 bytes in process_read_output
5640 That is, read(2) returns more bytes than have
5641 ever been written successfully. The 1033 bytes
5642 read are the 1022 bytes written successfully
5643 after processing (for example with CRs added if
5644 the terminal is set up that way which it is
5645 here). The same bytes will be seen again in a
5646 later read(2), without the CRs. */
5648 if (errno
== EAGAIN
)
5651 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5653 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5655 /* Put what we should have written in wait_queue. */
5656 write_queue_push (p
, cur_object
, cur_buf
, cur_len
, 1);
5657 wait_reading_process_output (0, 20 * 1000 * 1000,
5658 0, 0, Qnil
, NULL
, 0);
5659 /* Reread queue, to see what is left. */
5662 else if (errno
== EPIPE
)
5664 p
->raw_status_new
= 0;
5665 pset_status (p
, list2 (Qexit
, make_number (256)));
5666 p
->tick
= ++process_tick
;
5667 deactivate_process (proc
);
5668 error ("process %s no longer connected to pipe; closed it",
5672 /* This is a real error. */
5673 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5679 while (!NILP (p
->write_queue
));
5682 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5684 doc
: /* Send current contents of region as input to PROCESS.
5685 PROCESS may be a process, a buffer, the name of a process or buffer, or
5686 nil, indicating the current buffer's process.
5687 Called from program, takes three arguments, PROCESS, START and END.
5688 If the region is more than 500 characters long,
5689 it is sent in several bunches. This may happen even for shorter regions.
5690 Output from processes can arrive in between bunches. */)
5691 (Lisp_Object process
, Lisp_Object start
, Lisp_Object end
)
5694 ptrdiff_t start1
, end1
;
5696 proc
= get_process (process
);
5697 validate_region (&start
, &end
);
5699 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5700 move_gap (XINT (start
));
5702 start1
= CHAR_TO_BYTE (XINT (start
));
5703 end1
= CHAR_TO_BYTE (XINT (end
));
5704 send_process (proc
, (char *) BYTE_POS_ADDR (start1
), end1
- start1
,
5705 Fcurrent_buffer ());
5710 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5712 doc
: /* Send PROCESS the contents of STRING as input.
5713 PROCESS may be a process, a buffer, the name of a process or buffer, or
5714 nil, indicating the current buffer's process.
5715 If STRING is more than 500 characters long,
5716 it is sent in several bunches. This may happen even for shorter strings.
5717 Output from processes can arrive in between bunches. */)
5718 (Lisp_Object process
, Lisp_Object string
)
5721 CHECK_STRING (string
);
5722 proc
= get_process (process
);
5723 send_process (proc
, SSDATA (string
),
5724 SBYTES (string
), string
);
5728 /* Return the foreground process group for the tty/pty that
5729 the process P uses. */
5731 emacs_get_tty_pgrp (struct Lisp_Process
*p
)
5736 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5739 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5740 master side. Try the slave side. */
5741 fd
= emacs_open (SSDATA (p
->tty_name
), O_RDONLY
, 0);
5745 ioctl (fd
, TIOCGPGRP
, &gid
);
5749 #endif /* defined (TIOCGPGRP ) */
5754 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5755 Sprocess_running_child_p
, 0, 1, 0,
5756 doc
: /* Return t if PROCESS has given the terminal to a child.
5757 If the operating system does not make it possible to find out,
5758 return t unconditionally. */)
5759 (Lisp_Object process
)
5761 /* Initialize in case ioctl doesn't exist or gives an error,
5762 in a way that will cause returning t. */
5765 struct Lisp_Process
*p
;
5767 proc
= get_process (process
);
5768 p
= XPROCESS (proc
);
5770 if (!EQ (p
->type
, Qreal
))
5771 error ("Process %s is not a subprocess",
5774 error ("Process %s is not active",
5777 gid
= emacs_get_tty_pgrp (p
);
5784 /* send a signal number SIGNO to PROCESS.
5785 If CURRENT_GROUP is t, that means send to the process group
5786 that currently owns the terminal being used to communicate with PROCESS.
5787 This is used for various commands in shell mode.
5788 If CURRENT_GROUP is lambda, that means send to the process group
5789 that currently owns the terminal, but only if it is NOT the shell itself.
5791 If NOMSG is zero, insert signal-announcements into process's buffers
5794 If we can, we try to signal PROCESS by sending control characters
5795 down the pty. This allows us to signal inferiors who have changed
5796 their uid, for which killpg would return an EPERM error. */
5799 process_send_signal (Lisp_Object process
, int signo
, Lisp_Object current_group
,
5803 register struct Lisp_Process
*p
;
5807 proc
= get_process (process
);
5808 p
= XPROCESS (proc
);
5810 if (!EQ (p
->type
, Qreal
))
5811 error ("Process %s is not a subprocess",
5814 error ("Process %s is not active",
5818 current_group
= Qnil
;
5820 /* If we are using pgrps, get a pgrp number and make it negative. */
5821 if (NILP (current_group
))
5822 /* Send the signal to the shell's process group. */
5826 #ifdef SIGNALS_VIA_CHARACTERS
5827 /* If possible, send signals to the entire pgrp
5828 by sending an input character to it. */
5831 cc_t
*sig_char
= NULL
;
5833 tcgetattr (p
->infd
, &t
);
5838 sig_char
= &t
.c_cc
[VINTR
];
5842 sig_char
= &t
.c_cc
[VQUIT
];
5846 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5847 sig_char
= &t
.c_cc
[VSWTCH
];
5849 sig_char
= &t
.c_cc
[VSUSP
];
5854 if (sig_char
&& *sig_char
!= CDISABLE
)
5856 send_process (proc
, (char *) sig_char
, 1, Qnil
);
5859 /* If we can't send the signal with a character,
5860 fall through and send it another way. */
5862 /* The code above may fall through if it can't
5863 handle the signal. */
5864 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5867 /* Get the current pgrp using the tty itself, if we have that.
5868 Otherwise, use the pty to get the pgrp.
5869 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5870 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5871 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5872 His patch indicates that if TIOCGPGRP returns an error, then
5873 we should just assume that p->pid is also the process group id. */
5875 gid
= emacs_get_tty_pgrp (p
);
5878 /* If we can't get the information, assume
5879 the shell owns the tty. */
5882 /* It is not clear whether anything really can set GID to -1.
5883 Perhaps on some system one of those ioctls can or could do so.
5884 Or perhaps this is vestigial. */
5887 #else /* ! defined (TIOCGPGRP ) */
5888 /* Can't select pgrps on this system, so we know that
5889 the child itself heads the pgrp. */
5891 #endif /* ! defined (TIOCGPGRP ) */
5893 /* If current_group is lambda, and the shell owns the terminal,
5894 don't send any signal. */
5895 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
5903 p
->raw_status_new
= 0;
5904 pset_status (p
, Qrun
);
5905 p
->tick
= ++process_tick
;
5908 status_notify (NULL
);
5909 redisplay_preserve_echo_area (13);
5912 #endif /* ! defined (SIGCONT) */
5916 flush_pending_output (p
->infd
);
5920 /* If we don't have process groups, send the signal to the immediate
5921 subprocess. That isn't really right, but it's better than any
5922 obvious alternative. */
5925 kill (p
->pid
, signo
);
5929 /* gid may be a pid, or minus a pgrp's number */
5931 if (!NILP (current_group
))
5933 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
5934 EMACS_KILLPG (gid
, signo
);
5941 #else /* ! defined (TIOCSIGSEND) */
5942 EMACS_KILLPG (gid
, signo
);
5943 #endif /* ! defined (TIOCSIGSEND) */
5946 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
5947 doc
: /* Interrupt process PROCESS.
5948 PROCESS may be a process, a buffer, or the name of a process or buffer.
5949 No arg or nil means current buffer's process.
5950 Second arg CURRENT-GROUP non-nil means send signal to
5951 the current process-group of the process's controlling terminal
5952 rather than to the process's own process group.
5953 If the process is a shell, this means interrupt current subjob
5954 rather than the shell.
5956 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
5957 don't send the signal. */)
5958 (Lisp_Object process
, Lisp_Object current_group
)
5960 process_send_signal (process
, SIGINT
, current_group
, 0);
5964 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
5965 doc
: /* Kill process PROCESS. May be process or name of one.
5966 See function `interrupt-process' for more details on usage. */)
5967 (Lisp_Object process
, Lisp_Object current_group
)
5969 process_send_signal (process
, SIGKILL
, current_group
, 0);
5973 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
5974 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
5975 See function `interrupt-process' for more details on usage. */)
5976 (Lisp_Object process
, Lisp_Object current_group
)
5978 process_send_signal (process
, SIGQUIT
, current_group
, 0);
5982 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
5983 doc
: /* Stop process PROCESS. May be process or name of one.
5984 See function `interrupt-process' for more details on usage.
5985 If PROCESS is a network or serial process, inhibit handling of incoming
5987 (Lisp_Object process
, Lisp_Object current_group
)
5989 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
5991 struct Lisp_Process
*p
;
5993 p
= XPROCESS (process
);
5994 if (NILP (p
->command
)
5997 FD_CLR (p
->infd
, &input_wait_mask
);
5998 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6000 pset_command (p
, Qt
);
6004 error ("No SIGTSTP support");
6006 process_send_signal (process
, SIGTSTP
, current_group
, 0);
6011 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
6012 doc
: /* Continue process PROCESS. May be process or name of one.
6013 See function `interrupt-process' for more details on usage.
6014 If PROCESS is a network or serial process, resume handling of incoming
6016 (Lisp_Object process
, Lisp_Object current_group
)
6018 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6020 struct Lisp_Process
*p
;
6022 p
= XPROCESS (process
);
6023 if (EQ (p
->command
, Qt
)
6025 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
6027 FD_SET (p
->infd
, &input_wait_mask
);
6028 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
6030 if (fd_info
[ p
->infd
].flags
& FILE_SERIAL
)
6031 PurgeComm (fd_info
[ p
->infd
].hnd
, PURGE_RXABORT
| PURGE_RXCLEAR
);
6032 #else /* not WINDOWSNT */
6033 tcflush (p
->infd
, TCIFLUSH
);
6034 #endif /* not WINDOWSNT */
6036 pset_command (p
, Qnil
);
6040 process_send_signal (process
, SIGCONT
, current_group
, 0);
6042 error ("No SIGCONT support");
6047 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
6048 2, 2, "sProcess (name or number): \nnSignal code: ",
6049 doc
: /* Send PROCESS the signal with code SIGCODE.
6050 PROCESS may also be a number specifying the process id of the
6051 process to signal; in this case, the process need not be a child of
6053 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
6054 (Lisp_Object process
, Lisp_Object sigcode
)
6058 if (STRINGP (process
))
6060 Lisp_Object tem
= Fget_process (process
);
6063 Lisp_Object process_number
=
6064 string_to_number (SSDATA (process
), 10, 1);
6065 if (INTEGERP (process_number
) || FLOATP (process_number
))
6066 tem
= process_number
;
6070 else if (!NUMBERP (process
))
6071 process
= get_process (process
);
6076 if (NUMBERP (process
))
6077 CONS_TO_INTEGER (process
, pid_t
, pid
);
6080 CHECK_PROCESS (process
);
6081 pid
= XPROCESS (process
)->pid
;
6083 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6086 #define parse_signal(NAME, VALUE) \
6087 else if (!xstrcasecmp (name, NAME)) \
6088 XSETINT (sigcode, VALUE)
6090 if (INTEGERP (sigcode
))
6091 CHECK_TYPE_RANGED_INTEGER (int, sigcode
);
6096 CHECK_SYMBOL (sigcode
);
6097 name
= SSDATA (SYMBOL_NAME (sigcode
));
6099 if (!strncmp (name
, "SIG", 3) || !strncmp (name
, "sig", 3))
6105 parse_signal ("usr1", SIGUSR1
);
6108 parse_signal ("usr2", SIGUSR2
);
6110 parse_signal ("term", SIGTERM
);
6112 parse_signal ("hup", SIGHUP
);
6114 parse_signal ("int", SIGINT
);
6116 parse_signal ("quit", SIGQUIT
);
6118 parse_signal ("ill", SIGILL
);
6119 parse_signal ("abrt", SIGABRT
);
6121 parse_signal ("emt", SIGEMT
);
6124 parse_signal ("kill", SIGKILL
);
6126 parse_signal ("fpe", SIGFPE
);
6128 parse_signal ("bus", SIGBUS
);
6130 parse_signal ("segv", SIGSEGV
);
6132 parse_signal ("sys", SIGSYS
);
6135 parse_signal ("pipe", SIGPIPE
);
6138 parse_signal ("alrm", SIGALRM
);
6141 parse_signal ("urg", SIGURG
);
6144 parse_signal ("stop", SIGSTOP
);
6147 parse_signal ("tstp", SIGTSTP
);
6150 parse_signal ("cont", SIGCONT
);
6153 parse_signal ("chld", SIGCHLD
);
6156 parse_signal ("ttin", SIGTTIN
);
6159 parse_signal ("ttou", SIGTTOU
);
6162 parse_signal ("io", SIGIO
);
6165 parse_signal ("xcpu", SIGXCPU
);
6168 parse_signal ("xfsz", SIGXFSZ
);
6171 parse_signal ("vtalrm", SIGVTALRM
);
6174 parse_signal ("prof", SIGPROF
);
6177 parse_signal ("winch", SIGWINCH
);
6180 parse_signal ("info", SIGINFO
);
6183 error ("Undefined signal name %s", name
);
6188 return make_number (kill (pid
, XINT (sigcode
)));
6191 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6192 doc
: /* Make PROCESS see end-of-file in its input.
6193 EOF comes after any text already sent to it.
6194 PROCESS may be a process, a buffer, the name of a process or buffer, or
6195 nil, indicating the current buffer's process.
6196 If PROCESS is a network connection, or is a process communicating
6197 through a pipe (as opposed to a pty), then you cannot send any more
6198 text to PROCESS after you call this function.
6199 If PROCESS is a serial process, wait until all output written to the
6200 process has been transmitted to the serial port. */)
6201 (Lisp_Object process
)
6204 struct coding_system
*coding
;
6206 if (DATAGRAM_CONN_P (process
))
6209 proc
= get_process (process
);
6210 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6212 /* Make sure the process is really alive. */
6213 if (XPROCESS (proc
)->raw_status_new
)
6214 update_status (XPROCESS (proc
));
6215 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6216 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6218 if (CODING_REQUIRE_FLUSHING (coding
))
6220 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6221 send_process (proc
, "", 0, Qnil
);
6224 if (XPROCESS (proc
)->pty_flag
)
6225 send_process (proc
, "\004", 1, Qnil
);
6226 else if (EQ (XPROCESS (proc
)->type
, Qserial
))
6229 if (tcdrain (XPROCESS (proc
)->outfd
) != 0)
6230 error ("tcdrain() failed: %s", emacs_strerror (errno
));
6231 #endif /* not WINDOWSNT */
6232 /* Do nothing on Windows because writes are blocking. */
6236 int old_outfd
, new_outfd
;
6238 #ifdef HAVE_SHUTDOWN
6239 /* If this is a network connection, or socketpair is used
6240 for communication with the subprocess, call shutdown to cause EOF.
6241 (In some old system, shutdown to socketpair doesn't work.
6242 Then we just can't win.) */
6243 if (EQ (XPROCESS (proc
)->type
, Qnetwork
)
6244 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6245 shutdown (XPROCESS (proc
)->outfd
, 1);
6246 /* In case of socketpair, outfd == infd, so don't close it. */
6247 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6248 emacs_close (XPROCESS (proc
)->outfd
);
6249 #else /* not HAVE_SHUTDOWN */
6250 emacs_close (XPROCESS (proc
)->outfd
);
6251 #endif /* not HAVE_SHUTDOWN */
6252 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6255 old_outfd
= XPROCESS (proc
)->outfd
;
6257 if (!proc_encode_coding_system
[new_outfd
])
6258 proc_encode_coding_system
[new_outfd
]
6259 = xmalloc (sizeof (struct coding_system
));
6260 *proc_encode_coding_system
[new_outfd
]
6261 = *proc_encode_coding_system
[old_outfd
];
6262 memset (proc_encode_coding_system
[old_outfd
], 0,
6263 sizeof (struct coding_system
));
6265 XPROCESS (proc
)->outfd
= new_outfd
;
6270 /* If the status of the process DESIRED has changed, return true and
6271 set *STATUS to its exit status; otherwise, return false.
6272 If HAVE is nonnegative, assume that HAVE = waitpid (HAVE, STATUS, ...)
6273 has already been invoked, and do not invoke waitpid again. */
6276 process_status_retrieved (pid_t desired
, pid_t have
, int *status
)
6280 /* Invoke waitpid only with a known process ID; do not invoke
6281 waitpid with a nonpositive argument. Otherwise, Emacs might
6282 reap an unwanted process by mistake. For example, invoking
6283 waitpid (-1, ...) can mess up glib by reaping glib's subprocesses,
6284 so that another thread running glib won't find them. */
6286 have
= waitpid (desired
, status
, WNOHANG
| WUNTRACED
);
6287 while (have
< 0 && errno
== EINTR
);
6290 return have
== desired
;
6293 /* If PID is nonnegative, the child process PID with wait status W has
6294 changed its status; record this and return true.
6296 If PID is negative, ignore W, and look for known child processes
6297 of Emacs whose status have changed. For each one found, record its new
6300 All we do is change the status; we do not run sentinels or print
6301 notifications. That is saved for the next time keyboard input is
6302 done, in order to avoid timing errors.
6304 ** WARNING: this can be called during garbage collection.
6305 Therefore, it must not be fooled by the presence of mark bits in
6308 ** USG WARNING: Although it is not obvious from the documentation
6309 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6310 signal() before executing at least one wait(), otherwise the
6311 handler will be called again, resulting in an infinite loop. The
6312 relevant portion of the documentation reads "SIGCLD signals will be
6313 queued and the signal-catching function will be continually
6314 reentered until the queue is empty". Invoking signal() causes the
6315 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6318 ** Malloc WARNING: This should never call malloc either directly or
6319 indirectly; if it does, that is a bug */
6322 record_child_status_change (pid_t pid
, int w
)
6327 /* On POSIXish hosts, record at most one child only if we already
6328 know one child that has exited. */
6329 bool record_at_most_one_child
= 0 <= pid
;
6331 /* On DOS_NT (the only porting target that lacks WNOHANG),
6332 record the status of at most one child process, since the SIGCHLD
6333 handler must return right away. If any more processes want to
6334 signal us, we will get another signal. */
6335 bool record_at_most_one_child
= 1;
6340 /* Find the process that signaled us, and record its status. */
6342 /* The process can have been deleted by Fdelete_process. */
6343 for (tail
= deleted_pid_list
; CONSP (tail
); tail
= XCDR (tail
))
6345 bool all_pids_are_fixnums
6346 = (MOST_NEGATIVE_FIXNUM
<= TYPE_MINIMUM (pid_t
)
6347 && TYPE_MAXIMUM (pid_t
) <= MOST_POSITIVE_FIXNUM
);
6348 Lisp_Object xpid
= XCAR (tail
);
6349 if (all_pids_are_fixnums
? INTEGERP (xpid
) : NUMBERP (xpid
))
6352 if (INTEGERP (xpid
))
6353 deleted_pid
= XINT (xpid
);
6355 deleted_pid
= XFLOAT_DATA (xpid
);
6356 if (process_status_retrieved (deleted_pid
, pid
, &w
))
6358 XSETCAR (tail
, Qnil
);
6359 if (record_at_most_one_child
)
6365 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6366 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6368 Lisp_Object proc
= XCDR (XCAR (tail
));
6369 struct Lisp_Process
*p
= XPROCESS (proc
);
6370 if (p
->alive
&& process_status_retrieved (p
->pid
, pid
, &w
))
6372 /* Change the status of the process that was found. */
6373 p
->tick
= ++process_tick
;
6375 p
->raw_status_new
= 1;
6377 /* If process has terminated, stop waiting for its output. */
6378 if (WIFSIGNALED (w
) || WIFEXITED (w
))
6380 int clear_desc_flag
= 0;
6383 clear_desc_flag
= 1;
6385 /* clear_desc_flag avoids a compiler bug in Microsoft C. */
6386 if (clear_desc_flag
)
6388 FD_CLR (p
->infd
, &input_wait_mask
);
6389 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6393 /* Tell wait_reading_process_output that it needs to wake up and
6395 if (input_available_clear_time
)
6396 *input_available_clear_time
= make_emacs_time (0, 0);
6398 if (record_at_most_one_child
)
6405 /* The caller successfully waited for a pid but no asynchronous
6406 process was found for it, so this is a synchronous process. */
6408 synch_process_alive
= 0;
6410 /* Report the status of the synchronous process. */
6412 synch_process_retcode
= WEXITSTATUS (w
);
6413 else if (WIFSIGNALED (w
))
6414 synch_process_termsig
= WTERMSIG (w
);
6416 /* Tell wait_reading_process_output that it needs to wake up and
6418 if (input_available_clear_time
)
6419 *input_available_clear_time
= make_emacs_time (0, 0);
6427 handle_child_signal (int sig
)
6429 record_child_status_change (-1, 0);
6433 deliver_child_signal (int sig
)
6435 deliver_process_signal (sig
, handle_child_signal
);
6438 #endif /* SIGCHLD */
6442 exec_sentinel_unwind (Lisp_Object data
)
6444 pset_sentinel (XPROCESS (XCAR (data
)), XCDR (data
));
6449 exec_sentinel_error_handler (Lisp_Object error_val
)
6451 cmd_error_internal (error_val
, "error in process sentinel: ");
6453 update_echo_area ();
6454 Fsleep_for (make_number (2), Qnil
);
6459 exec_sentinel (Lisp_Object proc
, Lisp_Object reason
)
6461 Lisp_Object sentinel
, odeactivate
;
6462 struct Lisp_Process
*p
= XPROCESS (proc
);
6463 ptrdiff_t count
= SPECPDL_INDEX ();
6464 bool outer_running_asynch_code
= running_asynch_code
;
6465 int waiting
= waiting_for_user_input_p
;
6467 if (inhibit_sentinels
)
6470 /* No need to gcpro these, because all we do with them later
6471 is test them for EQness, and none of them should be a string. */
6472 odeactivate
= Vdeactivate_mark
;
6474 Lisp_Object obuffer
, okeymap
;
6475 XSETBUFFER (obuffer
, current_buffer
);
6476 okeymap
= BVAR (current_buffer
, keymap
);
6479 /* There's no good reason to let sentinels change the current
6480 buffer, and many callers of accept-process-output, sit-for, and
6481 friends don't expect current-buffer to be changed from under them. */
6482 record_unwind_current_buffer ();
6484 sentinel
= p
->sentinel
;
6485 if (NILP (sentinel
))
6488 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6489 assure that it gets restored no matter how the sentinel exits. */
6490 pset_sentinel (p
, Qnil
);
6491 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6492 /* Inhibit quit so that random quits don't screw up a running filter. */
6493 specbind (Qinhibit_quit
, Qt
);
6494 specbind (Qlast_nonmenu_event
, Qt
); /* Why? --Stef */
6496 /* In case we get recursively called,
6497 and we already saved the match data nonrecursively,
6498 save the same match data in safely recursive fashion. */
6499 if (outer_running_asynch_code
)
6502 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6503 restore_search_regs ();
6504 record_unwind_save_match_data ();
6505 Fset_match_data (tem
, Qt
);
6508 /* For speed, if a search happens within this code,
6509 save the match data in a special nonrecursive fashion. */
6510 running_asynch_code
= 1;
6512 internal_condition_case_1 (read_process_output_call
,
6514 Fcons (proc
, Fcons (reason
, Qnil
))),
6515 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6516 exec_sentinel_error_handler
);
6518 /* If we saved the match data nonrecursively, restore it now. */
6519 restore_search_regs ();
6520 running_asynch_code
= outer_running_asynch_code
;
6522 Vdeactivate_mark
= odeactivate
;
6524 /* Restore waiting_for_user_input_p as it was
6525 when we were called, in case the filter clobbered it. */
6526 waiting_for_user_input_p
= waiting
;
6529 if (! EQ (Fcurrent_buffer (), obuffer
)
6530 || ! EQ (current_buffer
->keymap
, okeymap
))
6532 /* But do it only if the caller is actually going to read events.
6533 Otherwise there's no need to make him wake up, and it could
6534 cause trouble (for example it would make sit_for return). */
6535 if (waiting_for_user_input_p
== -1)
6536 record_asynch_buffer_change ();
6538 unbind_to (count
, Qnil
);
6541 /* Report all recent events of a change in process status
6542 (either run the sentinel or output a message).
6543 This is usually done while Emacs is waiting for keyboard input
6544 but can be done at other times. */
6547 status_notify (struct Lisp_Process
*deleting_process
)
6549 register Lisp_Object proc
, buffer
;
6550 Lisp_Object tail
, msg
;
6551 struct gcpro gcpro1
, gcpro2
;
6555 /* We need to gcpro tail; if read_process_output calls a filter
6556 which deletes a process and removes the cons to which tail points
6557 from Vprocess_alist, and then causes a GC, tail is an unprotected
6561 /* Set this now, so that if new processes are created by sentinels
6562 that we run, we get called again to handle their status changes. */
6563 update_tick
= process_tick
;
6565 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6568 register struct Lisp_Process
*p
;
6570 proc
= Fcdr (XCAR (tail
));
6571 p
= XPROCESS (proc
);
6573 if (p
->tick
!= p
->update_tick
)
6575 p
->update_tick
= p
->tick
;
6577 /* If process is still active, read any output that remains. */
6578 while (! EQ (p
->filter
, Qt
)
6579 && ! EQ (p
->status
, Qconnect
)
6580 && ! EQ (p
->status
, Qlisten
)
6581 /* Network or serial process not stopped: */
6582 && ! EQ (p
->command
, Qt
)
6584 && p
!= deleting_process
6585 && read_process_output (proc
, p
->infd
) > 0);
6589 /* Get the text to use for the message. */
6590 if (p
->raw_status_new
)
6592 msg
= status_message (p
);
6594 /* If process is terminated, deactivate it or delete it. */
6596 if (CONSP (p
->status
))
6597 symbol
= XCAR (p
->status
);
6599 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6600 || EQ (symbol
, Qclosed
))
6602 if (delete_exited_processes
)
6603 remove_process (proc
);
6605 deactivate_process (proc
);
6608 /* The actions above may have further incremented p->tick.
6609 So set p->update_tick again
6610 so that an error in the sentinel will not cause
6611 this code to be run again. */
6612 p
->update_tick
= p
->tick
;
6613 /* Now output the message suitably. */
6614 if (!NILP (p
->sentinel
))
6615 exec_sentinel (proc
, msg
);
6616 /* Don't bother with a message in the buffer
6617 when a process becomes runnable. */
6618 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6621 struct buffer
*old
= current_buffer
;
6622 ptrdiff_t opoint
, opoint_byte
;
6623 ptrdiff_t before
, before_byte
;
6625 /* Avoid error if buffer is deleted
6626 (probably that's why the process is dead, too) */
6627 if (!BUFFER_LIVE_P (XBUFFER (buffer
)))
6629 Fset_buffer (buffer
);
6632 opoint_byte
= PT_BYTE
;
6633 /* Insert new output into buffer
6634 at the current end-of-output marker,
6635 thus preserving logical ordering of input and output. */
6636 if (XMARKER (p
->mark
)->buffer
)
6637 Fgoto_char (p
->mark
);
6639 SET_PT_BOTH (ZV
, ZV_BYTE
);
6642 before_byte
= PT_BYTE
;
6644 tem
= BVAR (current_buffer
, read_only
);
6645 bset_read_only (current_buffer
, Qnil
);
6646 insert_string ("\nProcess ");
6647 { /* FIXME: temporary kludge */
6648 Lisp_Object tem2
= p
->name
; Finsert (1, &tem2
); }
6649 insert_string (" ");
6651 bset_read_only (current_buffer
, tem
);
6652 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6654 if (opoint
>= before
)
6655 SET_PT_BOTH (opoint
+ (PT
- before
),
6656 opoint_byte
+ (PT_BYTE
- before_byte
));
6658 SET_PT_BOTH (opoint
, opoint_byte
);
6660 set_buffer_internal (old
);
6665 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6670 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6671 Sset_process_coding_system
, 1, 3, 0,
6672 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6673 DECODING will be used to decode subprocess output and ENCODING to
6674 encode subprocess input. */)
6675 (register Lisp_Object process
, Lisp_Object decoding
, Lisp_Object encoding
)
6677 register struct Lisp_Process
*p
;
6679 CHECK_PROCESS (process
);
6680 p
= XPROCESS (process
);
6682 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6684 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6685 Fcheck_coding_system (decoding
);
6686 Fcheck_coding_system (encoding
);
6687 encoding
= coding_inherit_eol_type (encoding
, Qnil
);
6688 pset_decode_coding_system (p
, decoding
);
6689 pset_encode_coding_system (p
, encoding
);
6690 setup_process_coding_systems (process
);
6695 DEFUN ("process-coding-system",
6696 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6697 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6698 (register Lisp_Object process
)
6700 CHECK_PROCESS (process
);
6701 return Fcons (XPROCESS (process
)->decode_coding_system
,
6702 XPROCESS (process
)->encode_coding_system
);
6705 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6706 Sset_process_filter_multibyte
, 2, 2, 0,
6707 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6708 If FLAG is non-nil, the filter is given multibyte strings.
6709 If FLAG is nil, the filter is given unibyte strings. In this case,
6710 all character code conversion except for end-of-line conversion is
6712 (Lisp_Object process
, Lisp_Object flag
)
6714 register struct Lisp_Process
*p
;
6716 CHECK_PROCESS (process
);
6717 p
= XPROCESS (process
);
6719 pset_decode_coding_system
6720 (p
, raw_text_coding_system (p
->decode_coding_system
));
6721 setup_process_coding_systems (process
);
6726 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6727 Sprocess_filter_multibyte_p
, 1, 1, 0,
6728 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6729 (Lisp_Object process
)
6731 register struct Lisp_Process
*p
;
6732 struct coding_system
*coding
;
6734 CHECK_PROCESS (process
);
6735 p
= XPROCESS (process
);
6736 coding
= proc_decode_coding_system
[p
->infd
];
6737 return (CODING_FOR_UNIBYTE (coding
) ? Qnil
: Qt
);
6746 add_gpm_wait_descriptor (int desc
)
6748 add_keyboard_wait_descriptor (desc
);
6752 delete_gpm_wait_descriptor (int desc
)
6754 delete_keyboard_wait_descriptor (desc
);
6759 # ifdef USABLE_SIGIO
6761 /* Return nonzero if *MASK has a bit set
6762 that corresponds to one of the keyboard input descriptors. */
6765 keyboard_bit_set (fd_set
*mask
)
6769 for (fd
= 0; fd
<= max_input_desc
; fd
++)
6770 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6771 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6778 #else /* not subprocesses */
6780 /* Defined on msdos.c. */
6781 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
6782 EMACS_TIME
*, void *);
6784 /* Implementation of wait_reading_process_output, assuming that there
6785 are no subprocesses. Used only by the MS-DOS build.
6787 Wait for timeout to elapse and/or keyboard input to be available.
6791 If negative, gobble data immediately available but don't wait for any.
6794 an additional duration to wait, measured in nanoseconds
6795 If TIME_LIMIT is zero, then:
6796 If NSECS == 0, there is no limit.
6797 If NSECS > 0, the timeout consists of NSECS only.
6798 If NSECS < 0, gobble data immediately, as if TIME_LIMIT were negative.
6801 0 to ignore keyboard input, or
6802 1 to return when input is available, or
6803 -1 means caller will actually read the input, so don't throw to
6806 see full version for other parameters. We know that wait_proc will
6807 always be NULL, since `subprocesses' isn't defined.
6809 DO_DISPLAY means redisplay should be done to show subprocess
6810 output that arrives.
6812 Return true if we received input from any process. */
6815 wait_reading_process_output (intmax_t time_limit
, int nsecs
, int read_kbd
,
6817 Lisp_Object wait_for_cell
,
6818 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
6821 EMACS_TIME end_time
, timeout
;
6828 else if (TYPE_MAXIMUM (time_t) < time_limit
)
6829 time_limit
= TYPE_MAXIMUM (time_t);
6831 /* What does time_limit really mean? */
6832 if (time_limit
|| 0 < nsecs
)
6834 timeout
= make_emacs_time (time_limit
, nsecs
);
6835 end_time
= add_emacs_time (current_emacs_time (), timeout
);
6838 /* Turn off periodic alarms (in case they are in use)
6839 and then turn off any other atimers,
6840 because the select emulator uses alarms. */
6842 turn_on_atimers (0);
6846 int timeout_reduced_for_timers
= 0;
6847 SELECT_TYPE waitchannels
;
6850 /* If calling from keyboard input, do not quit
6851 since we want to return C-g as an input character.
6852 Otherwise, do pending quit if requested. */
6856 /* Exit now if the cell we're waiting for became non-nil. */
6857 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6860 /* Compute time from now till when time limit is up */
6861 /* Exit if already run out */
6864 /* A negative timeout means
6865 gobble output available now
6866 but don't wait at all. */
6868 timeout
= make_emacs_time (0, 0);
6870 else if (time_limit
|| 0 < nsecs
)
6872 EMACS_TIME now
= current_emacs_time ();
6873 if (EMACS_TIME_LE (end_time
, now
))
6875 timeout
= sub_emacs_time (end_time
, now
);
6879 timeout
= make_emacs_time (100000, 0);
6882 /* If our caller will not immediately handle keyboard events,
6883 run timer events directly.
6884 (Callers that will immediately read keyboard events
6885 call timer_delay on their own.) */
6886 if (NILP (wait_for_cell
))
6888 EMACS_TIME timer_delay
;
6892 unsigned old_timers_run
= timers_run
;
6893 timer_delay
= timer_check ();
6894 if (timers_run
!= old_timers_run
&& do_display
)
6895 /* We must retry, since a timer may have requeued itself
6896 and that could alter the time delay. */
6897 redisplay_preserve_echo_area (14);
6901 while (!detect_input_pending ());
6903 /* If there is unread keyboard input, also return. */
6905 && requeued_events_pending_p ())
6908 if (EMACS_TIME_VALID_P (timer_delay
) && 0 <= nsecs
)
6910 if (EMACS_TIME_LT (timer_delay
, timeout
))
6912 timeout
= timer_delay
;
6913 timeout_reduced_for_timers
= 1;
6918 /* Cause C-g and alarm signals to take immediate action,
6919 and cause input available signals to zero out timeout. */
6921 set_waiting_for_input (&timeout
);
6923 /* If a frame has been newly mapped and needs updating,
6924 reprocess its display stuff. */
6925 if (frame_garbaged
&& do_display
)
6927 clear_waiting_for_input ();
6928 redisplay_preserve_echo_area (15);
6930 set_waiting_for_input (&timeout
);
6933 /* Wait till there is something to do. */
6934 FD_ZERO (&waitchannels
);
6935 if (read_kbd
&& detect_input_pending ())
6939 if (read_kbd
|| !NILP (wait_for_cell
))
6940 FD_SET (0, &waitchannels
);
6941 nfds
= pselect (1, &waitchannels
, NULL
, NULL
, &timeout
, NULL
);
6946 /* Make C-g and alarm signals set flags again */
6947 clear_waiting_for_input ();
6949 /* If we woke up due to SIGWINCH, actually change size now. */
6950 do_pending_window_change (0);
6952 if ((time_limit
|| nsecs
) && nfds
== 0 && ! timeout_reduced_for_timers
)
6953 /* We waited the full specified time, so return now. */
6958 /* If the system call was interrupted, then go around the
6960 if (xerrno
== EINTR
)
6961 FD_ZERO (&waitchannels
);
6963 error ("select error: %s", emacs_strerror (xerrno
));
6966 /* Check for keyboard input */
6969 && detect_input_pending_run_timers (do_display
))
6971 swallow_events (do_display
);
6972 if (detect_input_pending_run_timers (do_display
))
6976 /* If there is unread keyboard input, also return. */
6978 && requeued_events_pending_p ())
6981 /* If wait_for_cell. check for keyboard input
6982 but don't run any timers.
6983 ??? (It seems wrong to me to check for keyboard
6984 input at all when wait_for_cell, but the code
6985 has been this way since July 1994.
6986 Try changing this after version 19.31.) */
6987 if (! NILP (wait_for_cell
)
6988 && detect_input_pending ())
6990 swallow_events (do_display
);
6991 if (detect_input_pending ())
6995 /* Exit now if the cell we're waiting for became non-nil. */
6996 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7005 #endif /* not subprocesses */
7007 /* The following functions are needed even if async subprocesses are
7008 not supported. Some of them are no-op stubs in that case. */
7010 /* Add DESC to the set of keyboard input descriptors. */
7013 add_keyboard_wait_descriptor (int desc
)
7015 #ifdef subprocesses /* actually means "not MSDOS" */
7016 FD_SET (desc
, &input_wait_mask
);
7017 FD_SET (desc
, &non_process_wait_mask
);
7018 if (desc
> max_input_desc
)
7019 max_input_desc
= desc
;
7023 /* From now on, do not expect DESC to give keyboard input. */
7026 delete_keyboard_wait_descriptor (int desc
)
7030 int lim
= max_input_desc
;
7032 FD_CLR (desc
, &input_wait_mask
);
7033 FD_CLR (desc
, &non_process_wait_mask
);
7035 if (desc
== max_input_desc
)
7036 for (fd
= 0; fd
< lim
; fd
++)
7037 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
7038 max_input_desc
= fd
;
7042 /* Setup coding systems of PROCESS. */
7045 setup_process_coding_systems (Lisp_Object process
)
7048 struct Lisp_Process
*p
= XPROCESS (process
);
7050 int outch
= p
->outfd
;
7051 Lisp_Object coding_system
;
7053 if (inch
< 0 || outch
< 0)
7056 if (!proc_decode_coding_system
[inch
])
7057 proc_decode_coding_system
[inch
] = xmalloc (sizeof (struct coding_system
));
7058 coding_system
= p
->decode_coding_system
;
7059 if (! NILP (p
->filter
))
7061 else if (BUFFERP (p
->buffer
))
7063 if (NILP (BVAR (XBUFFER (p
->buffer
), enable_multibyte_characters
)))
7064 coding_system
= raw_text_coding_system (coding_system
);
7066 setup_coding_system (coding_system
, proc_decode_coding_system
[inch
]);
7068 if (!proc_encode_coding_system
[outch
])
7069 proc_encode_coding_system
[outch
] = xmalloc (sizeof (struct coding_system
));
7070 setup_coding_system (p
->encode_coding_system
,
7071 proc_encode_coding_system
[outch
]);
7075 /* Close all descriptors currently in use for communication
7076 with subprocess. This is used in a newly-forked subprocess
7077 to get rid of irrelevant descriptors. */
7080 close_process_descs (void)
7084 for (i
= 0; i
< MAXDESC
; i
++)
7086 Lisp_Object process
;
7087 process
= chan_process
[i
];
7088 if (!NILP (process
))
7090 int in
= XPROCESS (process
)->infd
;
7091 int out
= XPROCESS (process
)->outfd
;
7094 if (out
>= 0 && in
!= out
)
7101 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7102 doc
: /* Return the (or a) process associated with BUFFER.
7103 BUFFER may be a buffer or the name of one. */)
7104 (register Lisp_Object buffer
)
7107 register Lisp_Object buf
, tail
, proc
;
7109 if (NILP (buffer
)) return Qnil
;
7110 buf
= Fget_buffer (buffer
);
7111 if (NILP (buf
)) return Qnil
;
7113 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7115 proc
= Fcdr (XCAR (tail
));
7116 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
7119 #endif /* subprocesses */
7123 DEFUN ("process-inherit-coding-system-flag",
7124 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7126 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
7127 If this flag is t, `buffer-file-coding-system' of the buffer
7128 associated with PROCESS will inherit the coding system used to decode
7129 the process output. */)
7130 (register Lisp_Object process
)
7133 CHECK_PROCESS (process
);
7134 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
7136 /* Ignore the argument and return the value of
7137 inherit-process-coding-system. */
7138 return inherit_process_coding_system
? Qt
: Qnil
;
7142 /* Kill all processes associated with `buffer'.
7143 If `buffer' is nil, kill all processes */
7146 kill_buffer_processes (Lisp_Object buffer
)
7149 Lisp_Object tail
, proc
;
7151 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7153 proc
= XCDR (XCAR (tail
));
7155 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
7157 if (NETCONN_P (proc
) || SERIALCONN_P (proc
))
7158 Fdelete_process (proc
);
7159 else if (XPROCESS (proc
)->infd
>= 0)
7160 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
7163 #else /* subprocesses */
7164 /* Since we have no subprocesses, this does nothing. */
7165 #endif /* subprocesses */
7168 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
,
7169 Swaiting_for_user_input_p
, 0, 0, 0,
7170 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
7171 This is intended for use by asynchronous process output filters and sentinels. */)
7175 return (waiting_for_user_input_p
? Qt
: Qnil
);
7181 /* Stop reading input from keyboard sources. */
7184 hold_keyboard_input (void)
7189 /* Resume reading input from keyboard sources. */
7192 unhold_keyboard_input (void)
7197 /* Return non-zero if keyboard input is on hold, zero otherwise. */
7200 kbd_on_hold_p (void)
7202 return kbd_is_on_hold
;
7206 /* Enumeration of and access to system processes a-la ps(1). */
7208 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
7210 doc
: /* Return a list of numerical process IDs of all running processes.
7211 If this functionality is unsupported, return nil.
7213 See `process-attributes' for getting attributes of a process given its ID. */)
7216 return list_system_processes ();
7219 DEFUN ("process-attributes", Fprocess_attributes
,
7220 Sprocess_attributes
, 1, 1, 0,
7221 doc
: /* Return attributes of the process given by its PID, a number.
7223 Value is an alist where each element is a cons cell of the form
7227 If this functionality is unsupported, the value is nil.
7229 See `list-system-processes' for getting a list of all process IDs.
7231 The KEYs of the attributes that this function may return are listed
7232 below, together with the type of the associated VALUE (in parentheses).
7233 Not all platforms support all of these attributes; unsupported
7234 attributes will not appear in the returned alist.
7235 Unless explicitly indicated otherwise, numbers can have either
7236 integer or floating point values.
7238 euid -- Effective user User ID of the process (number)
7239 user -- User name corresponding to euid (string)
7240 egid -- Effective user Group ID of the process (number)
7241 group -- Group name corresponding to egid (string)
7242 comm -- Command name (executable name only) (string)
7243 state -- Process state code, such as "S", "R", or "T" (string)
7244 ppid -- Parent process ID (number)
7245 pgrp -- Process group ID (number)
7246 sess -- Session ID, i.e. process ID of session leader (number)
7247 ttname -- Controlling tty name (string)
7248 tpgid -- ID of foreground process group on the process's tty (number)
7249 minflt -- number of minor page faults (number)
7250 majflt -- number of major page faults (number)
7251 cminflt -- cumulative number of minor page faults (number)
7252 cmajflt -- cumulative number of major page faults (number)
7253 utime -- user time used by the process, in (current-time) format,
7254 which is a list of integers (HIGH LOW USEC PSEC)
7255 stime -- system time used by the process (current-time)
7256 time -- sum of utime and stime (current-time)
7257 cutime -- user time used by the process and its children (current-time)
7258 cstime -- system time used by the process and its children (current-time)
7259 ctime -- sum of cutime and cstime (current-time)
7260 pri -- priority of the process (number)
7261 nice -- nice value of the process (number)
7262 thcount -- process thread count (number)
7263 start -- time the process started (current-time)
7264 vsize -- virtual memory size of the process in KB's (number)
7265 rss -- resident set size of the process in KB's (number)
7266 etime -- elapsed time the process is running, in (HIGH LOW USEC PSEC) format
7267 pcpu -- percents of CPU time used by the process (floating-point number)
7268 pmem -- percents of total physical memory used by process's resident set
7269 (floating-point number)
7270 args -- command line which invoked the process (string). */)
7273 return system_process_attributes (pid
);
7277 /* This is not called "init_process" because that is the name of a
7278 Mach system call, so it would cause problems on Darwin systems. */
7280 init_process_emacs (void)
7285 inhibit_sentinels
= 0;
7289 if (! noninteractive
|| initialized
)
7292 struct sigaction action
;
7293 emacs_sigaction_init (&action
, deliver_child_signal
);
7294 sigaction (SIGCHLD
, &action
, 0);
7298 FD_ZERO (&input_wait_mask
);
7299 FD_ZERO (&non_keyboard_wait_mask
);
7300 FD_ZERO (&non_process_wait_mask
);
7301 FD_ZERO (&write_mask
);
7302 max_process_desc
= 0;
7303 memset (fd_callback_info
, 0, sizeof (fd_callback_info
));
7305 #ifdef NON_BLOCKING_CONNECT
7306 FD_ZERO (&connect_wait_mask
);
7307 num_pending_connects
= 0;
7310 #ifdef ADAPTIVE_READ_BUFFERING
7311 process_output_delay_count
= 0;
7312 process_output_skip
= 0;
7315 /* Don't do this, it caused infinite select loops. The display
7316 method should call add_keyboard_wait_descriptor on stdin if it
7319 FD_SET (0, &input_wait_mask
);
7322 Vprocess_alist
= Qnil
;
7324 deleted_pid_list
= Qnil
;
7326 for (i
= 0; i
< MAXDESC
; i
++)
7328 chan_process
[i
] = Qnil
;
7329 proc_buffered_char
[i
] = -1;
7331 memset (proc_decode_coding_system
, 0, sizeof proc_decode_coding_system
);
7332 memset (proc_encode_coding_system
, 0, sizeof proc_encode_coding_system
);
7333 #ifdef DATAGRAM_SOCKETS
7334 memset (datagram_address
, 0, sizeof datagram_address
);
7338 Lisp_Object subfeatures
= Qnil
;
7339 const struct socket_options
*sopt
;
7341 #define ADD_SUBFEATURE(key, val) \
7342 subfeatures = pure_cons (pure_cons (key, pure_cons (val, Qnil)), subfeatures)
7344 #ifdef NON_BLOCKING_CONNECT
7345 ADD_SUBFEATURE (QCnowait
, Qt
);
7347 #ifdef DATAGRAM_SOCKETS
7348 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7350 #ifdef HAVE_SEQPACKET
7351 ADD_SUBFEATURE (QCtype
, Qseqpacket
);
7353 #ifdef HAVE_LOCAL_SOCKETS
7354 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7356 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7358 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7360 #ifdef HAVE_GETSOCKNAME
7361 ADD_SUBFEATURE (QCservice
, Qt
);
7363 #if defined (O_NONBLOCK) || defined (O_NDELAY)
7364 ADD_SUBFEATURE (QCserver
, Qt
);
7367 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7368 subfeatures
= pure_cons (intern_c_string (sopt
->name
), subfeatures
);
7370 Fprovide (intern_c_string ("make-network-process"), subfeatures
);
7373 #if defined (DARWIN_OS)
7374 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7375 processes. As such, we only change the default value. */
7378 char const *release
= (STRINGP (Voperating_system_release
)
7379 ? SSDATA (Voperating_system_release
)
7381 if (!release
|| !release
[0] || (release
[0] < '7' && release
[1] == '.')) {
7382 Vprocess_connection_type
= Qnil
;
7386 #endif /* subprocesses */
7391 syms_of_process (void)
7395 DEFSYM (Qprocessp
, "processp");
7396 DEFSYM (Qrun
, "run");
7397 DEFSYM (Qstop
, "stop");
7398 DEFSYM (Qsignal
, "signal");
7400 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7403 Qexit = intern_c_string ("exit");
7404 staticpro (&Qexit); */
7406 DEFSYM (Qopen
, "open");
7407 DEFSYM (Qclosed
, "closed");
7408 DEFSYM (Qconnect
, "connect");
7409 DEFSYM (Qfailed
, "failed");
7410 DEFSYM (Qlisten
, "listen");
7411 DEFSYM (Qlocal
, "local");
7412 DEFSYM (Qipv4
, "ipv4");
7414 DEFSYM (Qipv6
, "ipv6");
7416 DEFSYM (Qdatagram
, "datagram");
7417 DEFSYM (Qseqpacket
, "seqpacket");
7419 DEFSYM (QCport
, ":port");
7420 DEFSYM (QCspeed
, ":speed");
7421 DEFSYM (QCprocess
, ":process");
7423 DEFSYM (QCbytesize
, ":bytesize");
7424 DEFSYM (QCstopbits
, ":stopbits");
7425 DEFSYM (QCparity
, ":parity");
7426 DEFSYM (Qodd
, "odd");
7427 DEFSYM (Qeven
, "even");
7428 DEFSYM (QCflowcontrol
, ":flowcontrol");
7431 DEFSYM (QCsummary
, ":summary");
7433 DEFSYM (Qreal
, "real");
7434 DEFSYM (Qnetwork
, "network");
7435 DEFSYM (Qserial
, "serial");
7436 DEFSYM (QCbuffer
, ":buffer");
7437 DEFSYM (QChost
, ":host");
7438 DEFSYM (QCservice
, ":service");
7439 DEFSYM (QClocal
, ":local");
7440 DEFSYM (QCremote
, ":remote");
7441 DEFSYM (QCcoding
, ":coding");
7442 DEFSYM (QCserver
, ":server");
7443 DEFSYM (QCnowait
, ":nowait");
7444 DEFSYM (QCsentinel
, ":sentinel");
7445 DEFSYM (QClog
, ":log");
7446 DEFSYM (QCnoquery
, ":noquery");
7447 DEFSYM (QCstop
, ":stop");
7448 DEFSYM (QCoptions
, ":options");
7449 DEFSYM (QCplist
, ":plist");
7451 DEFSYM (Qlast_nonmenu_event
, "last-nonmenu-event");
7453 staticpro (&Vprocess_alist
);
7455 staticpro (&deleted_pid_list
);
7458 #endif /* subprocesses */
7460 DEFSYM (QCname
, ":name");
7461 DEFSYM (QCtype
, ":type");
7463 DEFSYM (Qeuid
, "euid");
7464 DEFSYM (Qegid
, "egid");
7465 DEFSYM (Quser
, "user");
7466 DEFSYM (Qgroup
, "group");
7467 DEFSYM (Qcomm
, "comm");
7468 DEFSYM (Qstate
, "state");
7469 DEFSYM (Qppid
, "ppid");
7470 DEFSYM (Qpgrp
, "pgrp");
7471 DEFSYM (Qsess
, "sess");
7472 DEFSYM (Qttname
, "ttname");
7473 DEFSYM (Qtpgid
, "tpgid");
7474 DEFSYM (Qminflt
, "minflt");
7475 DEFSYM (Qmajflt
, "majflt");
7476 DEFSYM (Qcminflt
, "cminflt");
7477 DEFSYM (Qcmajflt
, "cmajflt");
7478 DEFSYM (Qutime
, "utime");
7479 DEFSYM (Qstime
, "stime");
7480 DEFSYM (Qtime
, "time");
7481 DEFSYM (Qcutime
, "cutime");
7482 DEFSYM (Qcstime
, "cstime");
7483 DEFSYM (Qctime
, "ctime");
7484 DEFSYM (Qpri
, "pri");
7485 DEFSYM (Qnice
, "nice");
7486 DEFSYM (Qthcount
, "thcount");
7487 DEFSYM (Qstart
, "start");
7488 DEFSYM (Qvsize
, "vsize");
7489 DEFSYM (Qrss
, "rss");
7490 DEFSYM (Qetime
, "etime");
7491 DEFSYM (Qpcpu
, "pcpu");
7492 DEFSYM (Qpmem
, "pmem");
7493 DEFSYM (Qargs
, "args");
7495 DEFVAR_BOOL ("delete-exited-processes", delete_exited_processes
,
7496 doc
: /* Non-nil means delete processes immediately when they exit.
7497 A value of nil means don't delete them until `list-processes' is run. */);
7499 delete_exited_processes
= 1;
7502 DEFVAR_LISP ("process-connection-type", Vprocess_connection_type
,
7503 doc
: /* Control type of device used to communicate with subprocesses.
7504 Values are nil to use a pipe, or t or `pty' to use a pty.
7505 The value has no effect if the system has no ptys or if all ptys are busy:
7506 then a pipe is used in any case.
7507 The value takes effect when `start-process' is called. */);
7508 Vprocess_connection_type
= Qt
;
7510 #ifdef ADAPTIVE_READ_BUFFERING
7511 DEFVAR_LISP ("process-adaptive-read-buffering", Vprocess_adaptive_read_buffering
,
7512 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7513 On some systems, when Emacs reads the output from a subprocess, the output data
7514 is read in very small blocks, potentially resulting in very poor performance.
7515 This behavior can be remedied to some extent by setting this variable to a
7516 non-nil value, as it will automatically delay reading from such processes, to
7517 allow them to produce more output before Emacs tries to read it.
7518 If the value is t, the delay is reset after each write to the process; any other
7519 non-nil value means that the delay is not reset on write.
7520 The variable takes effect when `start-process' is called. */);
7521 Vprocess_adaptive_read_buffering
= Qt
;
7524 defsubr (&Sprocessp
);
7525 defsubr (&Sget_process
);
7526 defsubr (&Sdelete_process
);
7527 defsubr (&Sprocess_status
);
7528 defsubr (&Sprocess_exit_status
);
7529 defsubr (&Sprocess_id
);
7530 defsubr (&Sprocess_name
);
7531 defsubr (&Sprocess_tty_name
);
7532 defsubr (&Sprocess_command
);
7533 defsubr (&Sset_process_buffer
);
7534 defsubr (&Sprocess_buffer
);
7535 defsubr (&Sprocess_mark
);
7536 defsubr (&Sset_process_filter
);
7537 defsubr (&Sprocess_filter
);
7538 defsubr (&Sset_process_sentinel
);
7539 defsubr (&Sprocess_sentinel
);
7540 defsubr (&Sset_process_window_size
);
7541 defsubr (&Sset_process_inherit_coding_system_flag
);
7542 defsubr (&Sset_process_query_on_exit_flag
);
7543 defsubr (&Sprocess_query_on_exit_flag
);
7544 defsubr (&Sprocess_contact
);
7545 defsubr (&Sprocess_plist
);
7546 defsubr (&Sset_process_plist
);
7547 defsubr (&Sprocess_list
);
7548 defsubr (&Sstart_process
);
7549 defsubr (&Sserial_process_configure
);
7550 defsubr (&Smake_serial_process
);
7551 defsubr (&Sset_network_process_option
);
7552 defsubr (&Smake_network_process
);
7553 defsubr (&Sformat_network_address
);
7554 #if defined (HAVE_NET_IF_H)
7556 defsubr (&Snetwork_interface_list
);
7558 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
7559 defsubr (&Snetwork_interface_info
);
7561 #endif /* defined (HAVE_NET_IF_H) */
7562 #ifdef DATAGRAM_SOCKETS
7563 defsubr (&Sprocess_datagram_address
);
7564 defsubr (&Sset_process_datagram_address
);
7566 defsubr (&Saccept_process_output
);
7567 defsubr (&Sprocess_send_region
);
7568 defsubr (&Sprocess_send_string
);
7569 defsubr (&Sinterrupt_process
);
7570 defsubr (&Skill_process
);
7571 defsubr (&Squit_process
);
7572 defsubr (&Sstop_process
);
7573 defsubr (&Scontinue_process
);
7574 defsubr (&Sprocess_running_child_p
);
7575 defsubr (&Sprocess_send_eof
);
7576 defsubr (&Ssignal_process
);
7577 defsubr (&Swaiting_for_user_input_p
);
7578 defsubr (&Sprocess_type
);
7579 defsubr (&Sset_process_coding_system
);
7580 defsubr (&Sprocess_coding_system
);
7581 defsubr (&Sset_process_filter_multibyte
);
7582 defsubr (&Sprocess_filter_multibyte_p
);
7584 #endif /* subprocesses */
7586 defsubr (&Sget_buffer_process
);
7587 defsubr (&Sprocess_inherit_coding_system_flag
);
7588 defsubr (&Slist_system_processes
);
7589 defsubr (&Sprocess_attributes
);