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"
130 # define waitpid(pid, status, options) wait (status)
136 /* Work around GCC 4.7.0 bug with strict overflow checking; see
137 <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52904>.
138 These lines can be removed once the GCC bug is fixed. */
139 #if (__GNUC__ == 4 && 3 <= __GNUC_MINOR__) || 4 < __GNUC__
140 # pragma GCC diagnostic ignored "-Wstrict-overflow"
143 Lisp_Object Qeuid
, Qegid
, Qcomm
, Qstate
, Qppid
, Qpgrp
, Qsess
, Qttname
, Qtpgid
;
144 Lisp_Object Qminflt
, Qmajflt
, Qcminflt
, Qcmajflt
, Qutime
, Qstime
, Qcstime
;
145 Lisp_Object Qcutime
, Qpri
, Qnice
, Qthcount
, Qstart
, Qvsize
, Qrss
, Qargs
;
146 Lisp_Object Quser
, Qgroup
, Qetime
, Qpcpu
, Qpmem
, Qtime
, Qctime
;
147 Lisp_Object QCname
, QCtype
;
149 /* Non-zero if keyboard input is on hold, zero otherwise. */
151 static int kbd_is_on_hold
;
153 /* Nonzero means don't run process sentinels. This is used
155 int inhibit_sentinels
;
159 Lisp_Object Qprocessp
;
160 static Lisp_Object Qrun
, Qstop
, Qsignal
;
161 static Lisp_Object Qopen
, Qclosed
, Qconnect
, Qfailed
, Qlisten
;
163 static Lisp_Object Qipv4
, Qdatagram
, Qseqpacket
;
164 static Lisp_Object Qreal
, Qnetwork
, Qserial
;
166 static Lisp_Object Qipv6
;
168 static Lisp_Object QCport
, QCprocess
;
170 Lisp_Object QCbytesize
, QCstopbits
, QCparity
, Qodd
, Qeven
;
171 Lisp_Object QCflowcontrol
, Qhw
, Qsw
, QCsummary
;
172 static Lisp_Object QCbuffer
, QChost
, QCservice
;
173 static Lisp_Object QClocal
, QCremote
, QCcoding
;
174 static Lisp_Object QCserver
, QCnowait
, QCnoquery
, QCstop
;
175 static Lisp_Object QCsentinel
, QClog
, QCoptions
, QCplist
;
176 static Lisp_Object Qlast_nonmenu_event
;
178 #define NETCONN_P(p) (EQ (XPROCESS (p)->type, Qnetwork))
179 #define NETCONN1_P(p) (EQ (p->type, Qnetwork))
180 #define SERIALCONN_P(p) (EQ (XPROCESS (p)->type, Qserial))
181 #define SERIALCONN1_P(p) (EQ (p->type, Qserial))
187 /* Number of events of change of status of a process. */
188 static EMACS_INT process_tick
;
189 /* Number of events for which the user or sentinel has been notified. */
190 static EMACS_INT update_tick
;
192 /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */
194 /* Only W32 has this, it really means that select can't take write mask. */
195 #ifdef BROKEN_NON_BLOCKING_CONNECT
196 #undef NON_BLOCKING_CONNECT
197 #define SELECT_CANT_DO_WRITE_MASK
199 #ifndef NON_BLOCKING_CONNECT
201 #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX)
202 #if defined (O_NONBLOCK) || defined (O_NDELAY)
203 #if defined (EWOULDBLOCK) || defined (EINPROGRESS)
204 #define NON_BLOCKING_CONNECT
205 #endif /* EWOULDBLOCK || EINPROGRESS */
206 #endif /* O_NONBLOCK || O_NDELAY */
207 #endif /* HAVE_GETPEERNAME || GNU_LINUX */
208 #endif /* HAVE_SELECT */
209 #endif /* NON_BLOCKING_CONNECT */
210 #endif /* BROKEN_NON_BLOCKING_CONNECT */
212 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
213 this system. We need to read full packets, so we need a
214 "non-destructive" select. So we require either native select,
215 or emulation of select using FIONREAD. */
217 #ifndef BROKEN_DATAGRAM_SOCKETS
218 # if defined HAVE_SELECT || defined USABLE_FIONREAD
219 # if defined HAVE_SENDTO && defined HAVE_RECVFROM && defined EMSGSIZE
220 # define DATAGRAM_SOCKETS
225 #if defined HAVE_LOCAL_SOCKETS && defined DATAGRAM_SOCKETS
226 # define HAVE_SEQPACKET
229 #if !defined (ADAPTIVE_READ_BUFFERING) && !defined (NO_ADAPTIVE_READ_BUFFERING)
230 #define ADAPTIVE_READ_BUFFERING
233 #ifdef ADAPTIVE_READ_BUFFERING
234 #define READ_OUTPUT_DELAY_INCREMENT (EMACS_TIME_RESOLUTION / 100)
235 #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5)
236 #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7)
238 /* Number of processes which have a non-zero read_output_delay,
239 and therefore might be delayed for adaptive read buffering. */
241 static int process_output_delay_count
;
243 /* Non-zero if any process has non-nil read_output_skip. */
245 static int process_output_skip
;
248 #define process_output_delay_count 0
251 static void create_process (Lisp_Object
, char **, Lisp_Object
);
253 static int keyboard_bit_set (SELECT_TYPE
*);
255 static void deactivate_process (Lisp_Object
);
256 static void status_notify (struct Lisp_Process
*);
257 static int read_process_output (Lisp_Object
, int);
258 static void handle_child_signal (int);
259 static void create_pty (Lisp_Object
);
261 /* If we support a window system, turn on the code to poll periodically
262 to detect C-g. It isn't actually used when doing interrupt input. */
263 #ifdef HAVE_WINDOW_SYSTEM
264 #define POLL_FOR_INPUT
267 static Lisp_Object
get_process (register Lisp_Object name
);
268 static void exec_sentinel (Lisp_Object proc
, Lisp_Object reason
);
270 /* Mask of bits indicating the descriptors that we wait for input on. */
272 static SELECT_TYPE input_wait_mask
;
274 /* Mask that excludes keyboard input descriptor(s). */
276 static SELECT_TYPE non_keyboard_wait_mask
;
278 /* Mask that excludes process input descriptor(s). */
280 static SELECT_TYPE non_process_wait_mask
;
282 /* Mask for selecting for write. */
284 static SELECT_TYPE write_mask
;
286 #ifdef NON_BLOCKING_CONNECT
287 /* Mask of bits indicating the descriptors that we wait for connect to
288 complete on. Once they complete, they are removed from this mask
289 and added to the input_wait_mask and non_keyboard_wait_mask. */
291 static SELECT_TYPE connect_wait_mask
;
293 /* Number of bits set in connect_wait_mask. */
294 static int num_pending_connects
;
295 #endif /* NON_BLOCKING_CONNECT */
297 /* The largest descriptor currently in use for a process object. */
298 static int max_process_desc
;
300 /* The largest descriptor currently in use for input. */
301 static int max_input_desc
;
303 /* Indexed by descriptor, gives the process (if any) for that descriptor */
304 static Lisp_Object chan_process
[MAXDESC
];
306 /* Alist of elements (NAME . PROCESS) */
307 static Lisp_Object Vprocess_alist
;
309 /* Buffered-ahead input char from process, indexed by channel.
310 -1 means empty (no char is buffered).
311 Used on sys V where the only way to tell if there is any
312 output from the process is to read at least one char.
313 Always -1 on systems that support FIONREAD. */
315 static int proc_buffered_char
[MAXDESC
];
317 /* Table of `struct coding-system' for each process. */
318 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
319 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
321 #ifdef DATAGRAM_SOCKETS
322 /* Table of `partner address' for datagram sockets. */
323 static struct sockaddr_and_len
{
326 } datagram_address
[MAXDESC
];
327 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
328 #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XPROCESS (proc)->infd].sa != 0)
330 #define DATAGRAM_CHAN_P(chan) (0)
331 #define DATAGRAM_CONN_P(proc) (0)
334 /* Maximum number of bytes to send to a pty without an eof. */
335 static int pty_max_bytes
;
337 /* These setters are used only in this file, so they can be private. */
339 pset_buffer (struct Lisp_Process
*p
, Lisp_Object val
)
344 pset_command (struct Lisp_Process
*p
, Lisp_Object val
)
349 pset_decode_coding_system (struct Lisp_Process
*p
, Lisp_Object val
)
351 p
->decode_coding_system
= val
;
354 pset_decoding_buf (struct Lisp_Process
*p
, Lisp_Object val
)
356 p
->decoding_buf
= val
;
359 pset_encode_coding_system (struct Lisp_Process
*p
, Lisp_Object val
)
361 p
->encode_coding_system
= val
;
364 pset_encoding_buf (struct Lisp_Process
*p
, Lisp_Object val
)
366 p
->encoding_buf
= val
;
369 pset_filter (struct Lisp_Process
*p
, Lisp_Object val
)
374 pset_log (struct Lisp_Process
*p
, Lisp_Object val
)
379 pset_mark (struct Lisp_Process
*p
, Lisp_Object val
)
384 pset_name (struct Lisp_Process
*p
, Lisp_Object val
)
389 pset_plist (struct Lisp_Process
*p
, Lisp_Object val
)
394 pset_sentinel (struct Lisp_Process
*p
, Lisp_Object val
)
399 pset_status (struct Lisp_Process
*p
, Lisp_Object val
)
404 pset_tty_name (struct Lisp_Process
*p
, Lisp_Object val
)
409 pset_type (struct Lisp_Process
*p
, Lisp_Object val
)
414 pset_write_queue (struct Lisp_Process
*p
, Lisp_Object val
)
416 p
->write_queue
= val
;
421 static struct fd_callback_data
427 int condition
; /* mask of the defines above. */
428 } fd_callback_info
[MAXDESC
];
431 /* Add a file descriptor FD to be monitored for when read is possible.
432 When read is possible, call FUNC with argument DATA. */
435 add_read_fd (int fd
, fd_callback func
, void *data
)
437 eassert (fd
< MAXDESC
);
438 add_keyboard_wait_descriptor (fd
);
440 fd_callback_info
[fd
].func
= func
;
441 fd_callback_info
[fd
].data
= data
;
442 fd_callback_info
[fd
].condition
|= FOR_READ
;
445 /* Stop monitoring file descriptor FD for when read is possible. */
448 delete_read_fd (int fd
)
450 eassert (fd
< MAXDESC
);
451 delete_keyboard_wait_descriptor (fd
);
453 fd_callback_info
[fd
].condition
&= ~FOR_READ
;
454 if (fd_callback_info
[fd
].condition
== 0)
456 fd_callback_info
[fd
].func
= 0;
457 fd_callback_info
[fd
].data
= 0;
461 /* Add a file descriptor FD to be monitored for when write is possible.
462 When write is possible, call FUNC with argument DATA. */
465 add_write_fd (int fd
, fd_callback func
, void *data
)
467 eassert (fd
< MAXDESC
);
468 FD_SET (fd
, &write_mask
);
469 if (fd
> max_input_desc
)
472 fd_callback_info
[fd
].func
= func
;
473 fd_callback_info
[fd
].data
= data
;
474 fd_callback_info
[fd
].condition
|= FOR_WRITE
;
477 /* Stop monitoring file descriptor FD for when write is possible. */
480 delete_write_fd (int fd
)
482 int lim
= max_input_desc
;
484 eassert (fd
< MAXDESC
);
485 FD_CLR (fd
, &write_mask
);
486 fd_callback_info
[fd
].condition
&= ~FOR_WRITE
;
487 if (fd_callback_info
[fd
].condition
== 0)
489 fd_callback_info
[fd
].func
= 0;
490 fd_callback_info
[fd
].data
= 0;
492 if (fd
== max_input_desc
)
493 for (fd
= lim
; fd
>= 0; fd
--)
494 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
504 /* Compute the Lisp form of the process status, p->status, from
505 the numeric status that was returned by `wait'. */
507 static Lisp_Object
status_convert (int);
510 update_status (struct Lisp_Process
*p
)
512 eassert (p
->raw_status_new
);
513 pset_status (p
, status_convert (p
->raw_status
));
514 p
->raw_status_new
= 0;
517 /* Convert a process status word in Unix format to
518 the list that we use internally. */
521 status_convert (int w
)
524 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
525 else if (WIFEXITED (w
))
526 return Fcons (Qexit
, Fcons (make_number (WEXITSTATUS (w
)),
527 WCOREDUMP (w
) ? Qt
: Qnil
));
528 else if (WIFSIGNALED (w
))
529 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
530 WCOREDUMP (w
) ? Qt
: Qnil
));
535 /* Given a status-list, extract the three pieces of information
536 and store them individually through the three pointers. */
539 decode_status (Lisp_Object l
, Lisp_Object
*symbol
, int *code
, int *coredump
)
553 *code
= XFASTINT (XCAR (tem
));
555 *coredump
= !NILP (tem
);
559 /* Return a string describing a process status list. */
562 status_message (struct Lisp_Process
*p
)
564 Lisp_Object status
= p
->status
;
567 Lisp_Object string
, string2
;
569 decode_status (status
, &symbol
, &code
, &coredump
);
571 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
574 synchronize_system_messages_locale ();
575 signame
= strsignal (code
);
577 string
= build_string ("unknown");
582 string
= build_unibyte_string (signame
);
583 if (! NILP (Vlocale_coding_system
))
584 string
= (code_convert_string_norecord
585 (string
, Vlocale_coding_system
, 0));
586 c1
= STRING_CHAR (SDATA (string
));
589 Faset (string
, make_number (0), make_number (c2
));
591 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
592 return concat2 (string
, string2
);
594 else if (EQ (symbol
, Qexit
))
597 return build_string (code
== 0 ? "deleted\n" : "connection broken by remote peer\n");
599 return build_string ("finished\n");
600 string
= Fnumber_to_string (make_number (code
));
601 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
602 return concat3 (build_string ("exited abnormally with code "),
605 else if (EQ (symbol
, Qfailed
))
607 string
= Fnumber_to_string (make_number (code
));
608 string2
= build_string ("\n");
609 return concat3 (build_string ("failed with code "),
613 return Fcopy_sequence (Fsymbol_name (symbol
));
618 /* The file name of the pty opened by allocate_pty. */
619 static char pty_name
[24];
621 /* Open an available pty, returning a file descriptor.
622 Return -1 on failure.
623 The file name of the terminal corresponding to the pty
624 is left in the variable pty_name. */
635 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
636 for (i
= 0; i
< 16; i
++)
639 #ifdef PTY_NAME_SPRINTF
642 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
643 #endif /* no PTY_NAME_SPRINTF */
647 #else /* no PTY_OPEN */
649 { /* Some systems name their pseudoterminals so that there are gaps in
650 the usual sequence - for example, on HP9000/S700 systems, there
651 are no pseudoterminals with names ending in 'f'. So we wait for
652 three failures in a row before deciding that we've reached the
654 int failed_count
= 0;
657 if (stat (pty_name
, &stb
) < 0)
660 if (failed_count
>= 3)
667 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
669 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
672 #endif /* no PTY_OPEN */
676 /* check to make certain that both sides are available
677 this avoids a nasty yet stupid bug in rlogins */
678 #ifdef PTY_TTY_NAME_SPRINTF
681 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
682 #endif /* no PTY_TTY_NAME_SPRINTF */
683 if (access (pty_name
, 6) != 0)
698 #endif /* HAVE_PTYS */
701 make_process (Lisp_Object name
)
703 register Lisp_Object val
, tem
, name1
;
704 register struct Lisp_Process
*p
;
705 char suffix
[sizeof "<>" + INT_STRLEN_BOUND (printmax_t
)];
708 p
= allocate_process ();
709 /* Initialize Lisp data. Note that allocate_process initializes all
710 Lisp data to nil, so do it only for slots which should not be nil. */
711 pset_status (p
, Qrun
);
712 pset_mark (p
, Fmake_marker ());
714 /* Initialize non-Lisp data. Note that allocate_process zeroes out all
715 non-Lisp data, so do it only for slots which should not be zero. */
720 p
->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
723 /* If name is already in use, modify it until it is unused. */
728 tem
= Fget_process (name1
);
729 if (NILP (tem
)) break;
730 name1
= concat2 (name
, make_formatted_string (suffix
, "<%"pMd
">", i
));
734 XSETPROCESS (val
, p
);
735 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
740 remove_process (register Lisp_Object proc
)
742 register Lisp_Object pair
;
744 pair
= Frassq (proc
, Vprocess_alist
);
745 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
747 deactivate_process (proc
);
751 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
752 doc
: /* Return t if OBJECT is a process. */)
755 return PROCESSP (object
) ? Qt
: Qnil
;
758 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
759 doc
: /* Return the process named NAME, or nil if there is none. */)
760 (register Lisp_Object name
)
765 return Fcdr (Fassoc (name
, Vprocess_alist
));
768 /* This is how commands for the user decode process arguments. It
769 accepts a process, a process name, a buffer, a buffer name, or nil.
770 Buffers denote the first process in the buffer, and nil denotes the
774 get_process (register Lisp_Object name
)
776 register Lisp_Object proc
, obj
;
779 obj
= Fget_process (name
);
781 obj
= Fget_buffer (name
);
783 error ("Process %s does not exist", SDATA (name
));
785 else if (NILP (name
))
786 obj
= Fcurrent_buffer ();
790 /* Now obj should be either a buffer object or a process object.
794 proc
= Fget_buffer_process (obj
);
796 error ("Buffer %s has no process", SDATA (BVAR (XBUFFER (obj
), name
)));
808 /* Fdelete_process promises to immediately forget about the process, but in
809 reality, Emacs needs to remember those processes until they have been
810 treated by the SIGCHLD handler; otherwise this handler would consider the
811 process as being synchronous and say that the synchronous process is
813 static Lisp_Object deleted_pid_list
;
816 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
817 doc
: /* Delete PROCESS: kill it and forget about it immediately.
818 PROCESS may be a process, a buffer, the name of a process or buffer, or
819 nil, indicating the current buffer's process. */)
820 (register Lisp_Object process
)
822 register struct Lisp_Process
*p
;
824 process
= get_process (process
);
825 p
= XPROCESS (process
);
827 p
->raw_status_new
= 0;
828 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
830 pset_status (p
, Fcons (Qexit
, Fcons (make_number (0), Qnil
)));
831 p
->tick
= ++process_tick
;
833 redisplay_preserve_echo_area (13);
835 else if (p
->infd
>= 0)
841 /* No problem storing the pid here, as it is still in Vprocess_alist. */
842 deleted_pid_list
= Fcons (make_fixnum_or_float (pid
),
843 /* GC treated elements set to nil. */
844 Fdelq (Qnil
, deleted_pid_list
));
845 /* If the process has already signaled, remove it from the list. */
846 if (p
->raw_status_new
)
849 if (CONSP (p
->status
))
850 symbol
= XCAR (p
->status
);
851 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
853 = Fdelete (make_fixnum_or_float (pid
), deleted_pid_list
);
857 Fkill_process (process
, Qnil
);
858 /* Do this now, since remove_process will make the
859 SIGCHLD handler do nothing. */
860 pset_status (p
, Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
)));
861 p
->tick
= ++process_tick
;
863 redisplay_preserve_echo_area (13);
866 remove_process (process
);
870 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
871 doc
: /* Return the status of PROCESS.
872 The returned value is one of the following symbols:
873 run -- for a process that is running.
874 stop -- for a process stopped but continuable.
875 exit -- for a process that has exited.
876 signal -- for a process that has got a fatal signal.
877 open -- for a network stream connection that is open.
878 listen -- for a network stream server that is listening.
879 closed -- for a network stream connection that is closed.
880 connect -- when waiting for a non-blocking connection to complete.
881 failed -- when a non-blocking connection has failed.
882 nil -- if arg is a process name and no such process exists.
883 PROCESS may be a process, a buffer, the name of a process, or
884 nil, indicating the current buffer's process. */)
885 (register Lisp_Object process
)
887 register struct Lisp_Process
*p
;
888 register Lisp_Object status
;
890 if (STRINGP (process
))
891 process
= Fget_process (process
);
893 process
= get_process (process
);
898 p
= XPROCESS (process
);
899 if (p
->raw_status_new
)
903 status
= XCAR (status
);
904 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
906 if (EQ (status
, Qexit
))
908 else if (EQ (p
->command
, Qt
))
910 else if (EQ (status
, Qrun
))
916 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
918 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
919 If PROCESS has not yet exited or died, return 0. */)
920 (register Lisp_Object process
)
922 CHECK_PROCESS (process
);
923 if (XPROCESS (process
)->raw_status_new
)
924 update_status (XPROCESS (process
));
925 if (CONSP (XPROCESS (process
)->status
))
926 return XCAR (XCDR (XPROCESS (process
)->status
));
927 return make_number (0);
930 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
931 doc
: /* Return the process id of PROCESS.
932 This is the pid of the external process which PROCESS uses or talks to.
933 For a network connection, this value is nil. */)
934 (register Lisp_Object process
)
938 CHECK_PROCESS (process
);
939 pid
= XPROCESS (process
)->pid
;
940 return (pid
? make_fixnum_or_float (pid
) : Qnil
);
943 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
944 doc
: /* Return the name of PROCESS, as a string.
945 This is the name of the program invoked in PROCESS,
946 possibly modified to make it unique among process names. */)
947 (register Lisp_Object process
)
949 CHECK_PROCESS (process
);
950 return XPROCESS (process
)->name
;
953 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
954 doc
: /* Return the command that was executed to start PROCESS.
955 This is a list of strings, the first string being the program executed
956 and the rest of the strings being the arguments given to it.
957 For a network or serial process, this is nil (process is running) or t
958 \(process is stopped). */)
959 (register Lisp_Object process
)
961 CHECK_PROCESS (process
);
962 return XPROCESS (process
)->command
;
965 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
966 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
967 This is the terminal that the process itself reads and writes on,
968 not the name of the pty that Emacs uses to talk with that terminal. */)
969 (register Lisp_Object process
)
971 CHECK_PROCESS (process
);
972 return XPROCESS (process
)->tty_name
;
975 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
977 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil).
979 (register Lisp_Object process
, Lisp_Object buffer
)
981 struct Lisp_Process
*p
;
983 CHECK_PROCESS (process
);
985 CHECK_BUFFER (buffer
);
986 p
= XPROCESS (process
);
987 pset_buffer (p
, buffer
);
988 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
989 pset_childp (p
, Fplist_put (p
->childp
, QCbuffer
, buffer
));
990 setup_process_coding_systems (process
);
994 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
996 doc
: /* Return the buffer PROCESS is associated with.
997 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
998 (register Lisp_Object process
)
1000 CHECK_PROCESS (process
);
1001 return XPROCESS (process
)->buffer
;
1004 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
1006 doc
: /* Return the marker for the end of the last output from PROCESS. */)
1007 (register Lisp_Object process
)
1009 CHECK_PROCESS (process
);
1010 return XPROCESS (process
)->mark
;
1013 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
1015 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
1016 A value of t means stop accepting output from the process.
1018 When a process has a filter, its buffer is not used for output.
1019 Instead, each time it does output, the entire string of output is
1020 passed to the filter.
1022 The filter gets two arguments: the process and the string of output.
1023 The string argument is normally a multibyte string, except:
1024 - if the process' input coding system is no-conversion or raw-text,
1025 it is a unibyte string (the non-converted input), or else
1026 - if `default-enable-multibyte-characters' is nil, it is a unibyte
1027 string (the result of converting the decoded input multibyte
1028 string to unibyte with `string-make-unibyte'). */)
1029 (register Lisp_Object process
, Lisp_Object filter
)
1031 struct Lisp_Process
*p
;
1033 CHECK_PROCESS (process
);
1034 p
= XPROCESS (process
);
1036 /* Don't signal an error if the process' input file descriptor
1037 is closed. This could make debugging Lisp more difficult,
1038 for example when doing something like
1040 (setq process (start-process ...))
1042 (set-process-filter process ...) */
1046 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
1048 FD_CLR (p
->infd
, &input_wait_mask
);
1049 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
1051 else if (EQ (p
->filter
, Qt
)
1052 /* Network or serial process not stopped: */
1053 && !EQ (p
->command
, Qt
))
1055 FD_SET (p
->infd
, &input_wait_mask
);
1056 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
1060 pset_filter (p
, filter
);
1061 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1062 pset_childp (p
, Fplist_put (p
->childp
, QCfilter
, filter
));
1063 setup_process_coding_systems (process
);
1067 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
1069 doc
: /* Returns the filter function of PROCESS; nil if none.
1070 See `set-process-filter' for more info on filter functions. */)
1071 (register Lisp_Object process
)
1073 CHECK_PROCESS (process
);
1074 return XPROCESS (process
)->filter
;
1077 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
1079 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
1080 The sentinel is called as a function when the process changes state.
1081 It gets two arguments: the process, and a string describing the change. */)
1082 (register Lisp_Object process
, Lisp_Object sentinel
)
1084 struct Lisp_Process
*p
;
1086 CHECK_PROCESS (process
);
1087 p
= XPROCESS (process
);
1089 pset_sentinel (p
, sentinel
);
1090 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1091 pset_childp (p
, Fplist_put (p
->childp
, QCsentinel
, sentinel
));
1095 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1097 doc
: /* Return the sentinel of PROCESS; nil if none.
1098 See `set-process-sentinel' for more info on sentinels. */)
1099 (register Lisp_Object process
)
1101 CHECK_PROCESS (process
);
1102 return XPROCESS (process
)->sentinel
;
1105 DEFUN ("set-process-window-size", Fset_process_window_size
,
1106 Sset_process_window_size
, 3, 3, 0,
1107 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1108 (register Lisp_Object process
, Lisp_Object height
, Lisp_Object width
)
1110 CHECK_PROCESS (process
);
1111 CHECK_RANGED_INTEGER (height
, 0, INT_MAX
);
1112 CHECK_RANGED_INTEGER (width
, 0, INT_MAX
);
1114 if (XPROCESS (process
)->infd
< 0
1115 || set_window_size (XPROCESS (process
)->infd
,
1116 XINT (height
), XINT (width
)) <= 0)
1122 DEFUN ("set-process-inherit-coding-system-flag",
1123 Fset_process_inherit_coding_system_flag
,
1124 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1125 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1126 If the second argument FLAG is non-nil, then the variable
1127 `buffer-file-coding-system' of the buffer associated with PROCESS
1128 will be bound to the value of the coding system used to decode
1131 This is useful when the coding system specified for the process buffer
1132 leaves either the character code conversion or the end-of-line conversion
1133 unspecified, or if the coding system used to decode the process output
1134 is more appropriate for saving the process buffer.
1136 Binding the variable `inherit-process-coding-system' to non-nil before
1137 starting the process is an alternative way of setting the inherit flag
1138 for the process which will run.
1140 This function returns FLAG. */)
1141 (register Lisp_Object process
, Lisp_Object flag
)
1143 CHECK_PROCESS (process
);
1144 XPROCESS (process
)->inherit_coding_system_flag
= !NILP (flag
);
1148 DEFUN ("set-process-query-on-exit-flag",
1149 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1151 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1152 If the second argument FLAG is non-nil, Emacs will query the user before
1153 exiting or killing a buffer if PROCESS is running. This function
1155 (register Lisp_Object process
, Lisp_Object flag
)
1157 CHECK_PROCESS (process
);
1158 XPROCESS (process
)->kill_without_query
= NILP (flag
);
1162 DEFUN ("process-query-on-exit-flag",
1163 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1165 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1166 (register Lisp_Object process
)
1168 CHECK_PROCESS (process
);
1169 return (XPROCESS (process
)->kill_without_query
? Qnil
: Qt
);
1172 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1174 doc
: /* Return the contact info of PROCESS; t for a real child.
1175 For a network or serial connection, the value depends on the optional
1176 KEY arg. If KEY is nil, value is a cons cell of the form (HOST
1177 SERVICE) for a network connection or (PORT SPEED) for a serial
1178 connection. If KEY is t, the complete contact information for the
1179 connection is returned, else the specific value for the keyword KEY is
1180 returned. See `make-network-process' or `make-serial-process' for a
1181 list of keywords. */)
1182 (register Lisp_Object process
, Lisp_Object key
)
1184 Lisp_Object contact
;
1186 CHECK_PROCESS (process
);
1187 contact
= XPROCESS (process
)->childp
;
1189 #ifdef DATAGRAM_SOCKETS
1190 if (DATAGRAM_CONN_P (process
)
1191 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1192 contact
= Fplist_put (contact
, QCremote
,
1193 Fprocess_datagram_address (process
));
1196 if ((!NETCONN_P (process
) && !SERIALCONN_P (process
)) || EQ (key
, Qt
))
1198 if (NILP (key
) && NETCONN_P (process
))
1199 return Fcons (Fplist_get (contact
, QChost
),
1200 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1201 if (NILP (key
) && SERIALCONN_P (process
))
1202 return Fcons (Fplist_get (contact
, QCport
),
1203 Fcons (Fplist_get (contact
, QCspeed
), Qnil
));
1204 return Fplist_get (contact
, key
);
1207 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1209 doc
: /* Return the plist of PROCESS. */)
1210 (register Lisp_Object process
)
1212 CHECK_PROCESS (process
);
1213 return XPROCESS (process
)->plist
;
1216 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1218 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1219 (register Lisp_Object process
, Lisp_Object plist
)
1221 CHECK_PROCESS (process
);
1224 pset_plist (XPROCESS (process
), plist
);
1228 #if 0 /* Turned off because we don't currently record this info
1229 in the process. Perhaps add it. */
1230 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1231 doc
: /* Return the connection type of PROCESS.
1232 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1233 a socket connection. */)
1234 (Lisp_Object process
)
1236 return XPROCESS (process
)->type
;
1240 DEFUN ("process-type", Fprocess_type
, Sprocess_type
, 1, 1, 0,
1241 doc
: /* Return the connection type of PROCESS.
1242 The value is either the symbol `real', `network', or `serial'.
1243 PROCESS may be a process, a buffer, the name of a process or buffer, or
1244 nil, indicating the current buffer's process. */)
1245 (Lisp_Object process
)
1248 proc
= get_process (process
);
1249 return XPROCESS (proc
)->type
;
1252 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1254 doc
: /* Convert network ADDRESS from internal format to a string.
1255 A 4 or 5 element vector represents an IPv4 address (with port number).
1256 An 8 or 9 element vector represents an IPv6 address (with port number).
1257 If optional second argument OMIT-PORT is non-nil, don't include a port
1258 number in the string, even when present in ADDRESS.
1259 Returns nil if format of ADDRESS is invalid. */)
1260 (Lisp_Object address
, Lisp_Object omit_port
)
1265 if (STRINGP (address
)) /* AF_LOCAL */
1268 if (VECTORP (address
)) /* AF_INET or AF_INET6 */
1270 register struct Lisp_Vector
*p
= XVECTOR (address
);
1271 ptrdiff_t size
= p
->header
.size
;
1272 Lisp_Object args
[10];
1275 if (size
== 4 || (size
== 5 && !NILP (omit_port
)))
1277 args
[0] = build_string ("%d.%d.%d.%d");
1282 args
[0] = build_string ("%d.%d.%d.%d:%d");
1285 else if (size
== 8 || (size
== 9 && !NILP (omit_port
)))
1287 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
1292 args
[0] = build_string ("[%x:%x:%x:%x:%x:%x:%x:%x]:%d");
1298 for (i
= 0; i
< nargs
; i
++)
1300 if (! RANGED_INTEGERP (0, p
->contents
[i
], 65535))
1303 if (nargs
<= 5 /* IPv4 */
1304 && i
< 4 /* host, not port */
1305 && XINT (p
->contents
[i
]) > 255)
1308 args
[i
+1] = p
->contents
[i
];
1311 return Fformat (nargs
+1, args
);
1314 if (CONSP (address
))
1316 Lisp_Object args
[2];
1317 args
[0] = build_string ("<Family %d>");
1318 args
[1] = Fcar (address
);
1319 return Fformat (2, args
);
1325 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1326 doc
: /* Return a list of all processes. */)
1329 return Fmapcar (Qcdr
, Vprocess_alist
);
1332 /* Starting asynchronous inferior processes. */
1334 static Lisp_Object
start_process_unwind (Lisp_Object proc
);
1336 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1337 doc
: /* Start a program in a subprocess. Return the process object for it.
1338 NAME is name for process. It is modified if necessary to make it unique.
1339 BUFFER is the buffer (or buffer name) to associate with the process.
1341 Process output (both standard output and standard error streams) goes
1342 at end of BUFFER, unless you specify an output stream or filter
1343 function to handle the output. BUFFER may also be nil, meaning that
1344 this process is not associated with any buffer.
1346 PROGRAM is the program file name. It is searched for in `exec-path'
1347 (which see). If nil, just associate a pty with the buffer. Remaining
1348 arguments are strings to give program as arguments.
1350 If you want to separate standard output from standard error, invoke
1351 the command through a shell and redirect one of them using the shell
1354 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1355 (ptrdiff_t nargs
, Lisp_Object
*args
)
1357 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1358 register unsigned char **new_argv
;
1360 ptrdiff_t count
= SPECPDL_INDEX ();
1364 buffer
= Fget_buffer_create (buffer
);
1366 /* Make sure that the child will be able to chdir to the current
1367 buffer's current directory, or its unhandled equivalent. We
1368 can't just have the child check for an error when it does the
1369 chdir, since it's in a vfork.
1371 We have to GCPRO around this because Fexpand_file_name and
1372 Funhandled_file_name_directory might call a file name handling
1373 function. The argument list is protected by the caller, so all
1374 we really have to worry about is buffer. */
1376 struct gcpro gcpro1
, gcpro2
;
1378 current_dir
= BVAR (current_buffer
, directory
);
1380 GCPRO2 (buffer
, current_dir
);
1382 current_dir
= Funhandled_file_name_directory (current_dir
);
1383 if (NILP (current_dir
))
1384 /* If the file name handler says that current_dir is unreachable, use
1385 a sensible default. */
1386 current_dir
= build_string ("~/");
1387 current_dir
= expand_and_dir_to_file (current_dir
, Qnil
);
1388 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1389 report_file_error ("Setting current directory",
1390 Fcons (BVAR (current_buffer
, directory
), Qnil
));
1396 CHECK_STRING (name
);
1400 if (!NILP (program
))
1401 CHECK_STRING (program
);
1403 proc
= make_process (name
);
1404 /* If an error occurs and we can't start the process, we want to
1405 remove it from the process list. This means that each error
1406 check in create_process doesn't need to call remove_process
1407 itself; it's all taken care of here. */
1408 record_unwind_protect (start_process_unwind
, proc
);
1410 pset_childp (XPROCESS (proc
), Qt
);
1411 pset_plist (XPROCESS (proc
), Qnil
);
1412 pset_type (XPROCESS (proc
), Qreal
);
1413 pset_buffer (XPROCESS (proc
), buffer
);
1414 pset_sentinel (XPROCESS (proc
), Qnil
);
1415 pset_filter (XPROCESS (proc
), Qnil
);
1416 pset_command (XPROCESS (proc
), Flist (nargs
- 2, args
+ 2));
1419 /* AKA GNUTLS_INITSTAGE(proc). */
1420 XPROCESS (proc
)->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
1421 pset_gnutls_cred_type (XPROCESS (proc
), Qnil
);
1424 #ifdef ADAPTIVE_READ_BUFFERING
1425 XPROCESS (proc
)->adaptive_read_buffering
1426 = (NILP (Vprocess_adaptive_read_buffering
) ? 0
1427 : EQ (Vprocess_adaptive_read_buffering
, Qt
) ? 1 : 2);
1430 /* Make the process marker point into the process buffer (if any). */
1431 if (BUFFERP (buffer
))
1432 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1433 BUF_ZV (XBUFFER (buffer
)),
1434 BUF_ZV_BYTE (XBUFFER (buffer
)));
1437 /* Decide coding systems for communicating with the process. Here
1438 we don't setup the structure coding_system nor pay attention to
1439 unibyte mode. They are done in create_process. */
1441 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1442 Lisp_Object coding_systems
= Qt
;
1443 Lisp_Object val
, *args2
;
1444 struct gcpro gcpro1
, gcpro2
;
1446 val
= Vcoding_system_for_read
;
1449 args2
= alloca ((nargs
+ 1) * sizeof *args2
);
1450 args2
[0] = Qstart_process
;
1451 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1452 GCPRO2 (proc
, current_dir
);
1453 if (!NILP (program
))
1454 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1456 if (CONSP (coding_systems
))
1457 val
= XCAR (coding_systems
);
1458 else if (CONSP (Vdefault_process_coding_system
))
1459 val
= XCAR (Vdefault_process_coding_system
);
1461 pset_decode_coding_system (XPROCESS (proc
), val
);
1463 val
= Vcoding_system_for_write
;
1466 if (EQ (coding_systems
, Qt
))
1468 args2
= alloca ((nargs
+ 1) * sizeof *args2
);
1469 args2
[0] = Qstart_process
;
1470 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1471 GCPRO2 (proc
, current_dir
);
1472 if (!NILP (program
))
1473 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1476 if (CONSP (coding_systems
))
1477 val
= XCDR (coding_systems
);
1478 else if (CONSP (Vdefault_process_coding_system
))
1479 val
= XCDR (Vdefault_process_coding_system
);
1481 pset_encode_coding_system (XPROCESS (proc
), val
);
1482 /* Note: At this moment, the above coding system may leave
1483 text-conversion or eol-conversion unspecified. They will be
1484 decided after we read output from the process and decode it by
1485 some coding system, or just before we actually send a text to
1490 pset_decoding_buf (XPROCESS (proc
), empty_unibyte_string
);
1491 XPROCESS (proc
)->decoding_carryover
= 0;
1492 pset_encoding_buf (XPROCESS (proc
), empty_unibyte_string
);
1494 XPROCESS (proc
)->inherit_coding_system_flag
1495 = !(NILP (buffer
) || !inherit_process_coding_system
);
1497 if (!NILP (program
))
1499 /* If program file name is not absolute, search our path for it.
1500 Put the name we will really use in TEM. */
1501 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1502 && !(SCHARS (program
) > 1
1503 && IS_DEVICE_SEP (SREF (program
, 1))))
1505 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1508 GCPRO4 (name
, program
, buffer
, current_dir
);
1509 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1512 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1513 tem
= Fexpand_file_name (tem
, Qnil
);
1517 if (!NILP (Ffile_directory_p (program
)))
1518 error ("Specified program for new process is a directory");
1522 /* If program file name starts with /: for quoting a magic name,
1524 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1525 && SREF (tem
, 1) == ':')
1526 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1529 Lisp_Object arg_encoding
= Qnil
;
1530 struct gcpro gcpro1
;
1533 /* Encode the file name and put it in NEW_ARGV.
1534 That's where the child will use it to execute the program. */
1535 tem
= Fcons (ENCODE_FILE (tem
), Qnil
);
1537 /* Here we encode arguments by the coding system used for sending
1538 data to the process. We don't support using different coding
1539 systems for encoding arguments and for encoding data sent to the
1542 for (i
= 3; i
< nargs
; i
++)
1544 tem
= Fcons (args
[i
], tem
);
1545 CHECK_STRING (XCAR (tem
));
1546 if (STRING_MULTIBYTE (XCAR (tem
)))
1548 if (NILP (arg_encoding
))
1549 arg_encoding
= (complement_process_encoding_system
1550 (XPROCESS (proc
)->encode_coding_system
));
1552 code_convert_string_norecord
1553 (XCAR (tem
), arg_encoding
, 1));
1560 /* Now that everything is encoded we can collect the strings into
1562 new_argv
= alloca ((nargs
- 1) * sizeof *new_argv
);
1563 new_argv
[nargs
- 2] = 0;
1565 for (i
= nargs
- 2; i
-- != 0; )
1567 new_argv
[i
] = SDATA (XCAR (tem
));
1571 create_process (proc
, (char **) new_argv
, current_dir
);
1576 return unbind_to (count
, proc
);
1579 /* This function is the unwind_protect form for Fstart_process. If
1580 PROC doesn't have its pid set, then we know someone has signaled
1581 an error and the process wasn't started successfully, so we should
1582 remove it from the process list. */
1584 start_process_unwind (Lisp_Object proc
)
1586 if (!PROCESSP (proc
))
1589 /* Was PROC started successfully?
1590 -2 is used for a pty with no process, eg for gdb. */
1591 if (XPROCESS (proc
)->pid
<= 0 && XPROCESS (proc
)->pid
!= -2)
1592 remove_process (proc
);
1598 create_process_1 (struct atimer
*timer
)
1600 /* Nothing to do. */
1605 create_process (Lisp_Object process
, char **new_argv
, Lisp_Object current_dir
)
1607 int inchannel
, outchannel
;
1610 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1611 int wait_child_setup
[2];
1616 /* Use volatile to protect variables from being clobbered by vfork. */
1617 volatile int forkin
, forkout
;
1618 volatile int pty_flag
= 0;
1619 volatile Lisp_Object lisp_pty_name
= Qnil
;
1620 volatile Lisp_Object encoded_current_dir
;
1621 #if HAVE_WORKING_VFORK
1622 char **volatile save_environ
;
1625 inchannel
= outchannel
= -1;
1628 if (!NILP (Vprocess_connection_type
))
1629 outchannel
= inchannel
= allocate_pty ();
1633 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1634 /* On most USG systems it does not work to open the pty's tty here,
1635 then close it and reopen it in the child. */
1637 /* Don't let this terminal become our controlling terminal
1638 (in case we don't have one). */
1639 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1641 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1644 report_file_error ("Opening pty", Qnil
);
1646 forkin
= forkout
= -1;
1647 #endif /* not USG, or USG_SUBTTY_WORKS */
1649 lisp_pty_name
= build_string (pty_name
);
1652 #endif /* HAVE_PTYS */
1657 report_file_error ("Creating pipe", Qnil
);
1663 emacs_close (inchannel
);
1664 emacs_close (forkout
);
1665 report_file_error ("Creating pipe", Qnil
);
1671 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1675 tem
= pipe (wait_child_setup
);
1677 report_file_error ("Creating pipe", Qnil
);
1678 tem
= fcntl (wait_child_setup
[1], F_GETFD
, 0);
1680 tem
= fcntl (wait_child_setup
[1], F_SETFD
, tem
| FD_CLOEXEC
);
1683 emacs_close (wait_child_setup
[0]);
1684 emacs_close (wait_child_setup
[1]);
1685 report_file_error ("Setting file descriptor flags", Qnil
);
1691 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1692 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1695 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1696 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1700 /* Record this as an active process, with its channels.
1701 As a result, child_setup will close Emacs's side of the pipes. */
1702 chan_process
[inchannel
] = process
;
1703 XPROCESS (process
)->infd
= inchannel
;
1704 XPROCESS (process
)->outfd
= outchannel
;
1706 /* Previously we recorded the tty descriptor used in the subprocess.
1707 It was only used for getting the foreground tty process, so now
1708 we just reopen the device (see emacs_get_tty_pgrp) as this is
1709 more portable (see USG_SUBTTY_WORKS above). */
1711 XPROCESS (process
)->pty_flag
= pty_flag
;
1712 pset_status (XPROCESS (process
), Qrun
);
1714 FD_SET (inchannel
, &input_wait_mask
);
1715 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1716 if (inchannel
> max_process_desc
)
1717 max_process_desc
= inchannel
;
1719 /* Until we store the proper pid, enable the SIGCHLD handler
1720 to recognize an unknown pid as standing for this process.
1721 It is very important not to let this `marker' value stay
1722 in the table after this function has returned; if it does
1723 it might cause call-process to hang and subsequent asynchronous
1724 processes to get their return values scrambled. */
1725 XPROCESS (process
)->pid
= -1;
1727 /* This must be called after the above line because it may signal an
1729 setup_process_coding_systems (process
);
1731 encoded_current_dir
= ENCODE_FILE (current_dir
);
1736 /* Block SIGCHLD until we have a chance to store the new fork's
1737 pid in its process structure. */
1738 sigemptyset (&blocked
);
1739 sigaddset (&blocked
, SIGCHLD
);
1740 pthread_sigmask (SIG_BLOCK
, &blocked
, 0);
1743 #if HAVE_WORKING_VFORK
1744 /* child_setup must clobber environ on systems with true vfork.
1745 Protect it from permanent change. */
1746 save_environ
= environ
;
1752 #endif /* not WINDOWSNT */
1754 int xforkin
= forkin
;
1755 int xforkout
= forkout
;
1757 /* Make the pty be the controlling terminal of the process. */
1759 /* First, disconnect its current controlling terminal. */
1761 /* We tried doing setsid only if pty_flag, but it caused
1762 process_set_signal to fail on SGI when using a pipe. */
1764 /* Make the pty's terminal the controlling terminal. */
1765 if (pty_flag
&& xforkin
>= 0)
1768 /* We ignore the return value
1769 because faith@cs.unc.edu says that is necessary on Linux. */
1770 ioctl (xforkin
, TIOCSCTTY
, 0);
1773 #else /* not HAVE_SETSID */
1775 /* It's very important to call setpgrp here and no time
1776 afterwards. Otherwise, we lose our controlling tty which
1777 is set when we open the pty. */
1780 #endif /* not HAVE_SETSID */
1781 #if defined (LDISC1)
1782 if (pty_flag
&& xforkin
>= 0)
1785 tcgetattr (xforkin
, &t
);
1787 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1788 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1791 #if defined (NTTYDISC) && defined (TIOCSETD)
1792 if (pty_flag
&& xforkin
>= 0)
1794 /* Use new line discipline. */
1795 int ldisc
= NTTYDISC
;
1796 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1801 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1802 can do TIOCSPGRP only to the process's controlling tty. */
1805 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1806 I can't test it since I don't have 4.3. */
1807 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1810 ioctl (j
, TIOCNOTTY
, 0);
1814 /* In order to get a controlling terminal on some versions
1815 of BSD, it is necessary to put the process in pgrp 0
1816 before it opens the terminal. */
1824 #endif /* TIOCNOTTY */
1826 #if !defined (DONT_REOPEN_PTY)
1827 /*** There is a suggestion that this ought to be a
1828 conditional on TIOCSPGRP,
1829 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1830 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1831 that system does seem to need this code, even though
1832 both HAVE_SETSID and TIOCSCTTY are defined. */
1833 /* Now close the pty (if we had it open) and reopen it.
1834 This makes the pty the controlling terminal of the subprocess. */
1838 /* I wonder if emacs_close (emacs_open (pty_name, ...))
1841 emacs_close (xforkin
);
1842 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
1846 emacs_write (1, "Couldn't open the pty terminal ", 31);
1847 emacs_write (1, pty_name
, strlen (pty_name
));
1848 emacs_write (1, "\n", 1);
1853 #endif /* not DONT_REOPEN_PTY */
1855 #ifdef SETUP_SLAVE_PTY
1860 #endif /* SETUP_SLAVE_PTY */
1862 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1863 Now reenable it in the child, so it will die when we want it to. */
1865 signal (SIGHUP
, SIG_DFL
);
1867 #endif /* HAVE_PTYS */
1869 signal (SIGINT
, SIG_DFL
);
1870 signal (SIGQUIT
, SIG_DFL
);
1872 /* Emacs ignores SIGPIPE, but the child should not. */
1873 signal (SIGPIPE
, SIG_DFL
);
1876 /* Stop blocking signals in the child. */
1877 pthread_sigmask (SIG_SETMASK
, &empty_mask
, 0);
1881 child_setup_tty (xforkout
);
1883 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1884 new_argv
, 1, encoded_current_dir
);
1885 #else /* not WINDOWSNT */
1887 emacs_close (wait_child_setup
[0]);
1889 child_setup (xforkin
, xforkout
, xforkout
,
1890 new_argv
, 1, encoded_current_dir
);
1891 #endif /* not WINDOWSNT */
1894 /* Back in the parent process. */
1896 #if HAVE_WORKING_VFORK
1897 environ
= save_environ
;
1900 XPROCESS (process
)->pid
= pid
;
1902 /* Stop blocking signals in the parent. */
1904 pthread_sigmask (SIG_SETMASK
, &empty_mask
, 0);
1911 emacs_close (forkin
);
1912 if (forkin
!= forkout
&& forkout
>= 0)
1913 emacs_close (forkout
);
1917 /* vfork succeeded. */
1920 register_child (pid
, inchannel
);
1921 #endif /* WINDOWSNT */
1923 /* If the subfork execv fails, and it exits,
1924 this close hangs. I don't know why.
1925 So have an interrupt jar it loose. */
1927 struct atimer
*timer
;
1928 EMACS_TIME offset
= make_emacs_time (1, 0);
1931 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
1934 emacs_close (forkin
);
1936 cancel_atimer (timer
);
1940 if (forkin
!= forkout
&& forkout
>= 0)
1941 emacs_close (forkout
);
1943 pset_tty_name (XPROCESS (process
), lisp_pty_name
);
1945 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1946 /* Wait for child_setup to complete in case that vfork is
1947 actually defined as fork. The descriptor wait_child_setup[1]
1948 of a pipe is closed at the child side either by close-on-exec
1949 on successful execvp or the _exit call in child_setup. */
1953 emacs_close (wait_child_setup
[1]);
1954 emacs_read (wait_child_setup
[0], &dummy
, 1);
1955 emacs_close (wait_child_setup
[0]);
1960 /* Now generate the error if vfork failed. */
1962 report_file_error ("Doing vfork", Qnil
);
1966 create_pty (Lisp_Object process
)
1968 int inchannel
, outchannel
;
1971 inchannel
= outchannel
= -1;
1974 if (!NILP (Vprocess_connection_type
))
1975 outchannel
= inchannel
= allocate_pty ();
1979 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1980 /* On most USG systems it does not work to open the pty's tty here,
1981 then close it and reopen it in the child. */
1983 /* Don't let this terminal become our controlling terminal
1984 (in case we don't have one). */
1985 int forkout
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1987 int forkout
= emacs_open (pty_name
, O_RDWR
, 0);
1990 report_file_error ("Opening pty", Qnil
);
1991 #if defined (DONT_REOPEN_PTY)
1992 /* In the case that vfork is defined as fork, the parent process
1993 (Emacs) may send some data before the child process completes
1994 tty options setup. So we setup tty before forking. */
1995 child_setup_tty (forkout
);
1996 #endif /* DONT_REOPEN_PTY */
1997 #endif /* not USG, or USG_SUBTTY_WORKS */
2000 #endif /* HAVE_PTYS */
2003 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
2004 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
2007 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
2008 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
2012 /* Record this as an active process, with its channels.
2013 As a result, child_setup will close Emacs's side of the pipes. */
2014 chan_process
[inchannel
] = process
;
2015 XPROCESS (process
)->infd
= inchannel
;
2016 XPROCESS (process
)->outfd
= outchannel
;
2018 /* Previously we recorded the tty descriptor used in the subprocess.
2019 It was only used for getting the foreground tty process, so now
2020 we just reopen the device (see emacs_get_tty_pgrp) as this is
2021 more portable (see USG_SUBTTY_WORKS above). */
2023 XPROCESS (process
)->pty_flag
= pty_flag
;
2024 pset_status (XPROCESS (process
), Qrun
);
2025 setup_process_coding_systems (process
);
2027 FD_SET (inchannel
, &input_wait_mask
);
2028 FD_SET (inchannel
, &non_keyboard_wait_mask
);
2029 if (inchannel
> max_process_desc
)
2030 max_process_desc
= inchannel
;
2032 XPROCESS (process
)->pid
= -2;
2035 pset_tty_name (XPROCESS (process
), build_string (pty_name
));
2038 pset_tty_name (XPROCESS (process
), Qnil
);
2042 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2043 The address family of sa is not included in the result. */
2046 conv_sockaddr_to_lisp (struct sockaddr
*sa
, int len
)
2048 Lisp_Object address
;
2051 register struct Lisp_Vector
*p
;
2053 /* Workaround for a bug in getsockname on BSD: Names bound to
2054 sockets in the UNIX domain are inaccessible; getsockname returns
2055 a zero length name. */
2056 if (len
< offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
))
2057 return empty_unibyte_string
;
2059 switch (sa
->sa_family
)
2063 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2064 len
= sizeof (sin
->sin_addr
) + 1;
2065 address
= Fmake_vector (make_number (len
), Qnil
);
2066 p
= XVECTOR (address
);
2067 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2068 cp
= (unsigned char *) &sin
->sin_addr
;
2074 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2075 uint16_t *ip6
= (uint16_t *) &sin6
->sin6_addr
;
2076 len
= sizeof (sin6
->sin6_addr
)/2 + 1;
2077 address
= Fmake_vector (make_number (len
), Qnil
);
2078 p
= XVECTOR (address
);
2079 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
2080 for (i
= 0; i
< len
; i
++)
2081 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
2085 #ifdef HAVE_LOCAL_SOCKETS
2088 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2089 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2090 if (sockun
->sun_path
[i
] == 0)
2092 return make_unibyte_string (sockun
->sun_path
, i
);
2096 len
-= offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
);
2097 address
= Fcons (make_number (sa
->sa_family
),
2098 Fmake_vector (make_number (len
), Qnil
));
2099 p
= XVECTOR (XCDR (address
));
2100 cp
= (unsigned char *) &sa
->sa_family
+ sizeof (sa
->sa_family
);
2106 p
->contents
[i
++] = make_number (*cp
++);
2112 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2115 get_lisp_to_sockaddr_size (Lisp_Object address
, int *familyp
)
2117 register struct Lisp_Vector
*p
;
2119 if (VECTORP (address
))
2121 p
= XVECTOR (address
);
2122 if (p
->header
.size
== 5)
2125 return sizeof (struct sockaddr_in
);
2128 else if (p
->header
.size
== 9)
2130 *familyp
= AF_INET6
;
2131 return sizeof (struct sockaddr_in6
);
2135 #ifdef HAVE_LOCAL_SOCKETS
2136 else if (STRINGP (address
))
2138 *familyp
= AF_LOCAL
;
2139 return sizeof (struct sockaddr_un
);
2142 else if (CONSP (address
) && TYPE_RANGED_INTEGERP (int, XCAR (address
))
2143 && VECTORP (XCDR (address
)))
2145 struct sockaddr
*sa
;
2146 *familyp
= XINT (XCAR (address
));
2147 p
= XVECTOR (XCDR (address
));
2148 return p
->header
.size
+ sizeof (sa
->sa_family
);
2153 /* Convert an address object (vector or string) to an internal sockaddr.
2155 The address format has been basically validated by
2156 get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid;
2157 it could have come from user data. So if FAMILY is not valid,
2158 we return after zeroing *SA. */
2161 conv_lisp_to_sockaddr (int family
, Lisp_Object address
, struct sockaddr
*sa
, int len
)
2163 register struct Lisp_Vector
*p
;
2164 register unsigned char *cp
= NULL
;
2168 memset (sa
, 0, len
);
2170 if (VECTORP (address
))
2172 p
= XVECTOR (address
);
2173 if (family
== AF_INET
)
2175 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2176 len
= sizeof (sin
->sin_addr
) + 1;
2177 hostport
= XINT (p
->contents
[--len
]);
2178 sin
->sin_port
= htons (hostport
);
2179 cp
= (unsigned char *)&sin
->sin_addr
;
2180 sa
->sa_family
= family
;
2183 else if (family
== AF_INET6
)
2185 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2186 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2187 len
= sizeof (sin6
->sin6_addr
) + 1;
2188 hostport
= XINT (p
->contents
[--len
]);
2189 sin6
->sin6_port
= htons (hostport
);
2190 for (i
= 0; i
< len
; i
++)
2191 if (INTEGERP (p
->contents
[i
]))
2193 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2196 sa
->sa_family
= family
;
2203 else if (STRINGP (address
))
2205 #ifdef HAVE_LOCAL_SOCKETS
2206 if (family
== AF_LOCAL
)
2208 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2209 cp
= SDATA (address
);
2210 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2211 sockun
->sun_path
[i
] = *cp
++;
2212 sa
->sa_family
= family
;
2219 p
= XVECTOR (XCDR (address
));
2220 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2223 for (i
= 0; i
< len
; i
++)
2224 if (INTEGERP (p
->contents
[i
]))
2225 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2228 #ifdef DATAGRAM_SOCKETS
2229 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2231 doc
: /* Get the current datagram address associated with PROCESS. */)
2232 (Lisp_Object process
)
2236 CHECK_PROCESS (process
);
2238 if (!DATAGRAM_CONN_P (process
))
2241 channel
= XPROCESS (process
)->infd
;
2242 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2243 datagram_address
[channel
].len
);
2246 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2248 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2249 Returns nil upon error setting address, ADDRESS otherwise. */)
2250 (Lisp_Object process
, Lisp_Object address
)
2255 CHECK_PROCESS (process
);
2257 if (!DATAGRAM_CONN_P (process
))
2260 channel
= XPROCESS (process
)->infd
;
2262 len
= get_lisp_to_sockaddr_size (address
, &family
);
2263 if (datagram_address
[channel
].len
!= len
)
2265 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2271 static const struct socket_options
{
2272 /* The name of this option. Should be lowercase version of option
2273 name without SO_ prefix. */
2275 /* Option level SOL_... */
2277 /* Option number SO_... */
2279 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2280 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2281 } socket_options
[] =
2283 #ifdef SO_BINDTODEVICE
2284 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2287 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2290 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2293 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2296 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2299 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2302 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2305 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2307 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2310 /* Set option OPT to value VAL on socket S.
2312 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2313 Signals an error if setting a known option fails.
2317 set_socket_option (int s
, Lisp_Object opt
, Lisp_Object val
)
2320 const struct socket_options
*sopt
;
2325 name
= SSDATA (SYMBOL_NAME (opt
));
2326 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2327 if (strcmp (name
, sopt
->name
) == 0)
2330 switch (sopt
->opttype
)
2335 optval
= NILP (val
) ? 0 : 1;
2336 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2337 &optval
, sizeof (optval
));
2344 if (TYPE_RANGED_INTEGERP (int, val
))
2345 optval
= XINT (val
);
2347 error ("Bad option value for %s", name
);
2348 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2349 &optval
, sizeof (optval
));
2353 #ifdef SO_BINDTODEVICE
2356 char devname
[IFNAMSIZ
+1];
2358 /* This is broken, at least in the Linux 2.4 kernel.
2359 To unbind, the arg must be a zero integer, not the empty string.
2360 This should work on all systems. KFS. 2003-09-23. */
2361 memset (devname
, 0, sizeof devname
);
2364 char *arg
= SSDATA (val
);
2365 int len
= min (strlen (arg
), IFNAMSIZ
);
2366 memcpy (devname
, arg
, len
);
2368 else if (!NILP (val
))
2369 error ("Bad option value for %s", name
);
2370 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2379 struct linger linger
;
2382 linger
.l_linger
= 0;
2383 if (TYPE_RANGED_INTEGERP (int, val
))
2384 linger
.l_linger
= XINT (val
);
2386 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2387 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2388 &linger
, sizeof (linger
));
2398 report_file_error ("Cannot set network option",
2399 Fcons (opt
, Fcons (val
, Qnil
)));
2400 return (1 << sopt
->optbit
);
2404 DEFUN ("set-network-process-option",
2405 Fset_network_process_option
, Sset_network_process_option
,
2407 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2408 See `make-network-process' for a list of options and values.
2409 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2410 OPTION is not a supported option, return nil instead; otherwise return t. */)
2411 (Lisp_Object process
, Lisp_Object option
, Lisp_Object value
, Lisp_Object no_error
)
2414 struct Lisp_Process
*p
;
2416 CHECK_PROCESS (process
);
2417 p
= XPROCESS (process
);
2418 if (!NETCONN1_P (p
))
2419 error ("Process is not a network process");
2423 error ("Process is not running");
2425 if (set_socket_option (s
, option
, value
))
2427 pset_childp (p
, Fplist_put (p
->childp
, option
, value
));
2431 if (NILP (no_error
))
2432 error ("Unknown or unsupported option");
2438 DEFUN ("serial-process-configure",
2439 Fserial_process_configure
,
2440 Sserial_process_configure
,
2442 doc
: /* Configure speed, bytesize, etc. of a serial process.
2444 Arguments are specified as keyword/argument pairs. Attributes that
2445 are not given are re-initialized from the process's current
2446 configuration (available via the function `process-contact') or set to
2447 reasonable default values. The following arguments are defined:
2453 -- Any of these arguments can be given to identify the process that is
2454 to be configured. If none of these arguments is given, the current
2455 buffer's process is used.
2457 :speed SPEED -- SPEED is the speed of the serial port in bits per
2458 second, also called baud rate. Any value can be given for SPEED, but
2459 most serial ports work only at a few defined values between 1200 and
2460 115200, with 9600 being the most common value. If SPEED is nil, the
2461 serial port is not configured any further, i.e., all other arguments
2462 are ignored. This may be useful for special serial ports such as
2463 Bluetooth-to-serial converters which can only be configured through AT
2464 commands. A value of nil for SPEED can be used only when passed
2465 through `make-serial-process' or `serial-term'.
2467 :bytesize BYTESIZE -- BYTESIZE is the number of bits per byte, which
2468 can be 7 or 8. If BYTESIZE is not given or nil, a value of 8 is used.
2470 :parity PARITY -- PARITY can be nil (don't use parity), the symbol
2471 `odd' (use odd parity), or the symbol `even' (use even parity). If
2472 PARITY is not given, no parity is used.
2474 :stopbits STOPBITS -- STOPBITS is the number of stopbits used to
2475 terminate a byte transmission. STOPBITS can be 1 or 2. If STOPBITS
2476 is not given or nil, 1 stopbit is used.
2478 :flowcontrol FLOWCONTROL -- FLOWCONTROL determines the type of
2479 flowcontrol to be used, which is either nil (don't use flowcontrol),
2480 the symbol `hw' (use RTS/CTS hardware flowcontrol), or the symbol `sw'
2481 \(use XON/XOFF software flowcontrol). If FLOWCONTROL is not given, no
2482 flowcontrol is used.
2484 `serial-process-configure' is called by `make-serial-process' for the
2485 initial configuration of the serial port.
2489 \(serial-process-configure :process "/dev/ttyS0" :speed 1200)
2491 \(serial-process-configure
2492 :buffer "COM1" :stopbits 1 :parity 'odd :flowcontrol 'hw)
2494 \(serial-process-configure :port "\\\\.\\COM13" :bytesize 7)
2496 usage: (serial-process-configure &rest ARGS) */)
2497 (ptrdiff_t nargs
, Lisp_Object
*args
)
2499 struct Lisp_Process
*p
;
2500 Lisp_Object contact
= Qnil
;
2501 Lisp_Object proc
= Qnil
;
2502 struct gcpro gcpro1
;
2504 contact
= Flist (nargs
, args
);
2507 proc
= Fplist_get (contact
, QCprocess
);
2509 proc
= Fplist_get (contact
, QCname
);
2511 proc
= Fplist_get (contact
, QCbuffer
);
2513 proc
= Fplist_get (contact
, QCport
);
2514 proc
= get_process (proc
);
2515 p
= XPROCESS (proc
);
2516 if (!EQ (p
->type
, Qserial
))
2517 error ("Not a serial process");
2519 if (NILP (Fplist_get (p
->childp
, QCspeed
)))
2525 serial_configure (p
, contact
);
2531 /* Used by make-serial-process to recover from errors. */
2533 make_serial_process_unwind (Lisp_Object proc
)
2535 if (!PROCESSP (proc
))
2537 remove_process (proc
);
2541 DEFUN ("make-serial-process", Fmake_serial_process
, Smake_serial_process
,
2543 doc
: /* Create and return a serial port process.
2545 In Emacs, serial port connections are represented by process objects,
2546 so input and output work as for subprocesses, and `delete-process'
2547 closes a serial port connection. However, a serial process has no
2548 process id, it cannot be signaled, and the status codes are different
2549 from normal processes.
2551 `make-serial-process' creates a process and a buffer, on which you
2552 probably want to use `process-send-string'. Try \\[serial-term] for
2553 an interactive terminal. See below for examples.
2555 Arguments are specified as keyword/argument pairs. The following
2556 arguments are defined:
2558 :port PORT -- (mandatory) PORT is the path or name of the serial port.
2559 For example, this could be "/dev/ttyS0" on Unix. On Windows, this
2560 could be "COM1", or "\\\\.\\COM10" for ports higher than COM9 (double
2561 the backslashes in strings).
2563 :speed SPEED -- (mandatory) is handled by `serial-process-configure',
2564 which this function calls.
2566 :name NAME -- NAME is the name of the process. If NAME is not given,
2567 the value of PORT is used.
2569 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2570 with the process. Process output goes at the end of that buffer,
2571 unless you specify an output stream or filter function to handle the
2572 output. If BUFFER is not given, the value of NAME is used.
2574 :coding CODING -- If CODING is a symbol, it specifies the coding
2575 system used for both reading and writing for this process. If CODING
2576 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2577 ENCODING is used for writing.
2579 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2580 the process is running. If BOOL is not given, query before exiting.
2582 :stop BOOL -- Start process in the `stopped' state if BOOL is non-nil.
2583 In the stopped state, a serial process does not accept incoming data,
2584 but you can send outgoing data. The stopped state is cleared by
2585 `continue-process' and set by `stop-process'.
2587 :filter FILTER -- Install FILTER as the process filter.
2589 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2591 :plist PLIST -- Install PLIST as the initial plist of the process.
2597 -- This function calls `serial-process-configure' to handle these
2600 The original argument list, possibly modified by later configuration,
2601 is available via the function `process-contact'.
2605 \(make-serial-process :port "/dev/ttyS0" :speed 9600)
2607 \(make-serial-process :port "COM1" :speed 115200 :stopbits 2)
2609 \(make-serial-process :port "\\\\.\\COM13" :speed 1200 :bytesize 7 :parity 'odd)
2611 \(make-serial-process :port "/dev/tty.BlueConsole-SPP-1" :speed nil)
2613 usage: (make-serial-process &rest ARGS) */)
2614 (ptrdiff_t nargs
, Lisp_Object
*args
)
2617 Lisp_Object proc
, contact
, port
;
2618 struct Lisp_Process
*p
;
2619 struct gcpro gcpro1
;
2620 Lisp_Object name
, buffer
;
2621 Lisp_Object tem
, val
;
2622 ptrdiff_t specpdl_count
= -1;
2627 contact
= Flist (nargs
, args
);
2630 port
= Fplist_get (contact
, QCport
);
2632 error ("No port specified");
2633 CHECK_STRING (port
);
2635 if (NILP (Fplist_member (contact
, QCspeed
)))
2636 error (":speed not specified");
2637 if (!NILP (Fplist_get (contact
, QCspeed
)))
2638 CHECK_NUMBER (Fplist_get (contact
, QCspeed
));
2640 name
= Fplist_get (contact
, QCname
);
2643 CHECK_STRING (name
);
2644 proc
= make_process (name
);
2645 specpdl_count
= SPECPDL_INDEX ();
2646 record_unwind_protect (make_serial_process_unwind
, proc
);
2647 p
= XPROCESS (proc
);
2649 fd
= serial_open (SSDATA (port
));
2652 if (fd
> max_process_desc
)
2653 max_process_desc
= fd
;
2654 chan_process
[fd
] = proc
;
2656 buffer
= Fplist_get (contact
, QCbuffer
);
2659 buffer
= Fget_buffer_create (buffer
);
2660 pset_buffer (p
, buffer
);
2662 pset_childp (p
, contact
);
2663 pset_plist (p
, Fcopy_sequence (Fplist_get (contact
, QCplist
)));
2664 pset_type (p
, Qserial
);
2665 pset_sentinel (p
, Fplist_get (contact
, QCsentinel
));
2666 pset_filter (p
, Fplist_get (contact
, QCfilter
));
2668 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
2669 p
->kill_without_query
= 1;
2670 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
2671 pset_command (p
, Qt
);
2674 if (!EQ (p
->command
, Qt
))
2676 FD_SET (fd
, &input_wait_mask
);
2677 FD_SET (fd
, &non_keyboard_wait_mask
);
2680 if (BUFFERP (buffer
))
2682 set_marker_both (p
->mark
, buffer
,
2683 BUF_ZV (XBUFFER (buffer
)),
2684 BUF_ZV_BYTE (XBUFFER (buffer
)));
2687 tem
= Fplist_member (contact
, QCcoding
);
2688 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
2694 val
= XCAR (XCDR (tem
));
2698 else if (!NILP (Vcoding_system_for_read
))
2699 val
= Vcoding_system_for_read
;
2700 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2701 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2703 pset_decode_coding_system (p
, val
);
2708 val
= XCAR (XCDR (tem
));
2712 else if (!NILP (Vcoding_system_for_write
))
2713 val
= Vcoding_system_for_write
;
2714 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2715 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2717 pset_encode_coding_system (p
, val
);
2719 setup_process_coding_systems (proc
);
2720 pset_decoding_buf (p
, empty_unibyte_string
);
2721 p
->decoding_carryover
= 0;
2722 pset_encoding_buf (p
, empty_unibyte_string
);
2723 p
->inherit_coding_system_flag
2724 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
2726 Fserial_process_configure (nargs
, args
);
2728 specpdl_ptr
= specpdl
+ specpdl_count
;
2734 /* Create a network stream/datagram client/server process. Treated
2735 exactly like a normal process when reading and writing. Primary
2736 differences are in status display and process deletion. A network
2737 connection has no PID; you cannot signal it. All you can do is
2738 stop/continue it and deactivate/close it via delete-process */
2740 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2742 doc
: /* Create and return a network server or client process.
2744 In Emacs, network connections are represented by process objects, so
2745 input and output work as for subprocesses and `delete-process' closes
2746 a network connection. However, a network process has no process id,
2747 it cannot be signaled, and the status codes are different from normal
2750 Arguments are specified as keyword/argument pairs. The following
2751 arguments are defined:
2753 :name NAME -- NAME is name for process. It is modified if necessary
2756 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2757 with the process. Process output goes at end of that buffer, unless
2758 you specify an output stream or filter function to handle the output.
2759 BUFFER may be also nil, meaning that this process is not associated
2762 :host HOST -- HOST is name of the host to connect to, or its IP
2763 address. The symbol `local' specifies the local host. If specified
2764 for a server process, it must be a valid name or address for the local
2765 host, and only clients connecting to that address will be accepted.
2767 :service SERVICE -- SERVICE is name of the service desired, or an
2768 integer specifying a port number to connect to. If SERVICE is t,
2769 a random port number is selected for the server. (If Emacs was
2770 compiled with getaddrinfo, a port number can also be specified as a
2771 string, e.g. "80", as well as an integer. This is not portable.)
2773 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2774 stream type connection, `datagram' creates a datagram type connection,
2775 `seqpacket' creates a reliable datagram connection.
2777 :family FAMILY -- FAMILY is the address (and protocol) family for the
2778 service specified by HOST and SERVICE. The default (nil) is to use
2779 whatever address family (IPv4 or IPv6) that is defined for the host
2780 and port number specified by HOST and SERVICE. Other address families
2782 local -- for a local (i.e. UNIX) address specified by SERVICE.
2783 ipv4 -- use IPv4 address family only.
2784 ipv6 -- use IPv6 address family only.
2786 :local ADDRESS -- ADDRESS is the local address used for the connection.
2787 This parameter is ignored when opening a client process. When specified
2788 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2790 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2791 connection. This parameter is ignored when opening a stream server
2792 process. For a datagram server process, it specifies the initial
2793 setting of the remote datagram address. When specified for a client
2794 process, the FAMILY, HOST, and SERVICE args are ignored.
2796 The format of ADDRESS depends on the address family:
2797 - An IPv4 address is represented as an vector of integers [A B C D P]
2798 corresponding to numeric IP address A.B.C.D and port number P.
2799 - A local address is represented as a string with the address in the
2800 local address space.
2801 - An "unsupported family" address is represented by a cons (F . AV)
2802 where F is the family number and AV is a vector containing the socket
2803 address data with one element per address data byte. Do not rely on
2804 this format in portable code, as it may depend on implementation
2805 defined constants, data sizes, and data structure alignment.
2807 :coding CODING -- If CODING is a symbol, it specifies the coding
2808 system used for both reading and writing for this process. If CODING
2809 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2810 ENCODING is used for writing.
2812 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2813 return without waiting for the connection to complete; instead, the
2814 sentinel function will be called with second arg matching "open" (if
2815 successful) or "failed" when the connect completes. Default is to use
2816 a blocking connect (i.e. wait) for stream type connections.
2818 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2819 running when Emacs is exited.
2821 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2822 In the stopped state, a server process does not accept new
2823 connections, and a client process does not handle incoming traffic.
2824 The stopped state is cleared by `continue-process' and set by
2827 :filter FILTER -- Install FILTER as the process filter.
2829 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2830 process filter are multibyte, otherwise they are unibyte.
2831 If this keyword is not specified, the strings are multibyte if
2832 the default value of `enable-multibyte-characters' is non-nil.
2834 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2836 :log LOG -- Install LOG as the server process log function. This
2837 function is called when the server accepts a network connection from a
2838 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2839 is the server process, CLIENT is the new process for the connection,
2840 and MESSAGE is a string.
2842 :plist PLIST -- Install PLIST as the new process' initial plist.
2844 :server QLEN -- if QLEN is non-nil, create a server process for the
2845 specified FAMILY, SERVICE, and connection type (stream or datagram).
2846 If QLEN is an integer, it is used as the max. length of the server's
2847 pending connection queue (also known as the backlog); the default
2848 queue length is 5. Default is to create a client process.
2850 The following network options can be specified for this connection:
2852 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2853 :dontroute BOOL -- Only send to directly connected hosts.
2854 :keepalive BOOL -- Send keep-alive messages on network stream.
2855 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2856 :oobinline BOOL -- Place out-of-band data in receive data stream.
2857 :priority INT -- Set protocol defined priority for sent packets.
2858 :reuseaddr BOOL -- Allow reusing a recently used local address
2859 (this is allowed by default for a server process).
2860 :bindtodevice NAME -- bind to interface NAME. Using this may require
2861 special privileges on some systems.
2863 Consult the relevant system programmer's manual pages for more
2864 information on using these options.
2867 A server process will listen for and accept connections from clients.
2868 When a client connection is accepted, a new network process is created
2869 for the connection with the following parameters:
2871 - The client's process name is constructed by concatenating the server
2872 process' NAME and a client identification string.
2873 - If the FILTER argument is non-nil, the client process will not get a
2874 separate process buffer; otherwise, the client's process buffer is a newly
2875 created buffer named after the server process' BUFFER name or process
2876 NAME concatenated with the client identification string.
2877 - The connection type and the process filter and sentinel parameters are
2878 inherited from the server process' TYPE, FILTER and SENTINEL.
2879 - The client process' contact info is set according to the client's
2880 addressing information (typically an IP address and a port number).
2881 - The client process' plist is initialized from the server's plist.
2883 Notice that the FILTER and SENTINEL args are never used directly by
2884 the server process. Also, the BUFFER argument is not used directly by
2885 the server process, but via the optional :log function, accepted (and
2886 failed) connections may be logged in the server process' buffer.
2888 The original argument list, modified with the actual connection
2889 information, is available via the `process-contact' function.
2891 usage: (make-network-process &rest ARGS) */)
2892 (ptrdiff_t nargs
, Lisp_Object
*args
)
2895 Lisp_Object contact
;
2896 struct Lisp_Process
*p
;
2897 #ifdef HAVE_GETADDRINFO
2898 struct addrinfo ai
, *res
, *lres
;
2899 struct addrinfo hints
;
2900 const char *portstring
;
2902 #else /* HAVE_GETADDRINFO */
2903 struct _emacs_addrinfo
2909 struct sockaddr
*ai_addr
;
2910 struct _emacs_addrinfo
*ai_next
;
2912 #endif /* HAVE_GETADDRINFO */
2913 struct sockaddr_in address_in
;
2914 #ifdef HAVE_LOCAL_SOCKETS
2915 struct sockaddr_un address_un
;
2920 int s
= -1, outch
, inch
;
2921 struct gcpro gcpro1
;
2922 ptrdiff_t count
= SPECPDL_INDEX ();
2924 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2926 Lisp_Object name
, buffer
, host
, service
, address
;
2927 Lisp_Object filter
, sentinel
;
2928 int is_non_blocking_client
= 0;
2929 int is_server
= 0, backlog
= 5;
2936 /* Save arguments for process-contact and clone-process. */
2937 contact
= Flist (nargs
, args
);
2941 /* Ensure socket support is loaded if available. */
2942 init_winsock (TRUE
);
2945 /* :type TYPE (nil: stream, datagram */
2946 tem
= Fplist_get (contact
, QCtype
);
2948 socktype
= SOCK_STREAM
;
2949 #ifdef DATAGRAM_SOCKETS
2950 else if (EQ (tem
, Qdatagram
))
2951 socktype
= SOCK_DGRAM
;
2953 #ifdef HAVE_SEQPACKET
2954 else if (EQ (tem
, Qseqpacket
))
2955 socktype
= SOCK_SEQPACKET
;
2958 error ("Unsupported connection type");
2961 tem
= Fplist_get (contact
, QCserver
);
2964 /* Don't support network sockets when non-blocking mode is
2965 not available, since a blocked Emacs is not useful. */
2966 #if !defined (O_NONBLOCK) && !defined (O_NDELAY)
2967 error ("Network servers not supported");
2970 if (TYPE_RANGED_INTEGERP (int, tem
))
2971 backlog
= XINT (tem
);
2975 /* Make QCaddress an alias for :local (server) or :remote (client). */
2976 QCaddress
= is_server
? QClocal
: QCremote
;
2979 if (!is_server
&& socktype
!= SOCK_DGRAM
2980 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2982 #ifndef NON_BLOCKING_CONNECT
2983 error ("Non-blocking connect not supported");
2985 is_non_blocking_client
= 1;
2989 name
= Fplist_get (contact
, QCname
);
2990 buffer
= Fplist_get (contact
, QCbuffer
);
2991 filter
= Fplist_get (contact
, QCfilter
);
2992 sentinel
= Fplist_get (contact
, QCsentinel
);
2994 CHECK_STRING (name
);
2996 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2997 ai
.ai_socktype
= socktype
;
3002 /* :local ADDRESS or :remote ADDRESS */
3003 address
= Fplist_get (contact
, QCaddress
);
3004 if (!NILP (address
))
3006 host
= service
= Qnil
;
3008 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
3009 error ("Malformed :address");
3010 ai
.ai_family
= family
;
3011 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
3012 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
3016 /* :family FAMILY -- nil (for Inet), local, or integer. */
3017 tem
= Fplist_get (contact
, QCfamily
);
3020 #if defined (HAVE_GETADDRINFO) && defined (AF_INET6)
3026 #ifdef HAVE_LOCAL_SOCKETS
3027 else if (EQ (tem
, Qlocal
))
3031 else if (EQ (tem
, Qipv6
))
3034 else if (EQ (tem
, Qipv4
))
3036 else if (TYPE_RANGED_INTEGERP (int, tem
))
3037 family
= XINT (tem
);
3039 error ("Unknown address family");
3041 ai
.ai_family
= family
;
3043 /* :service SERVICE -- string, integer (port number), or t (random port). */
3044 service
= Fplist_get (contact
, QCservice
);
3046 /* :host HOST -- hostname, ip address, or 'local for localhost. */
3047 host
= Fplist_get (contact
, QChost
);
3050 if (EQ (host
, Qlocal
))
3051 /* Depending on setup, "localhost" may map to different IPv4 and/or
3052 IPv6 addresses, so it's better to be explicit. (Bug#6781) */
3053 host
= build_string ("127.0.0.1");
3054 CHECK_STRING (host
);
3057 #ifdef HAVE_LOCAL_SOCKETS
3058 if (family
== AF_LOCAL
)
3062 message (":family local ignores the :host \"%s\" property",
3064 contact
= Fplist_put (contact
, QChost
, Qnil
);
3067 CHECK_STRING (service
);
3068 memset (&address_un
, 0, sizeof address_un
);
3069 address_un
.sun_family
= AF_LOCAL
;
3070 if (sizeof address_un
.sun_path
<= SBYTES (service
))
3071 error ("Service name too long");
3072 strcpy (address_un
.sun_path
, SSDATA (service
));
3073 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
3074 ai
.ai_addrlen
= sizeof address_un
;
3079 /* Slow down polling to every ten seconds.
3080 Some kernels have a bug which causes retrying connect to fail
3081 after a connect. Polling can interfere with gethostbyname too. */
3082 #ifdef POLL_FOR_INPUT
3083 if (socktype
!= SOCK_DGRAM
)
3085 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
3086 bind_polling_period (10);
3090 #ifdef HAVE_GETADDRINFO
3091 /* If we have a host, use getaddrinfo to resolve both host and service.
3092 Otherwise, use getservbyname to lookup the service. */
3096 /* SERVICE can either be a string or int.
3097 Convert to a C string for later use by getaddrinfo. */
3098 if (EQ (service
, Qt
))
3100 else if (INTEGERP (service
))
3102 sprintf (portbuf
, "%"pI
"d", XINT (service
));
3103 portstring
= portbuf
;
3107 CHECK_STRING (service
);
3108 portstring
= SSDATA (service
);
3113 memset (&hints
, 0, sizeof (hints
));
3115 hints
.ai_family
= family
;
3116 hints
.ai_socktype
= socktype
;
3117 hints
.ai_protocol
= 0;
3119 #ifdef HAVE_RES_INIT
3123 ret
= getaddrinfo (SSDATA (host
), portstring
, &hints
, &res
);
3125 #ifdef HAVE_GAI_STRERROR
3126 error ("%s/%s %s", SSDATA (host
), portstring
, gai_strerror (ret
));
3128 error ("%s/%s getaddrinfo error %d", SSDATA (host
), portstring
, ret
);
3134 #endif /* HAVE_GETADDRINFO */
3136 /* We end up here if getaddrinfo is not defined, or in case no hostname
3137 has been specified (e.g. for a local server process). */
3139 if (EQ (service
, Qt
))
3141 else if (INTEGERP (service
))
3142 port
= htons ((unsigned short) XINT (service
));
3145 struct servent
*svc_info
;
3146 CHECK_STRING (service
);
3147 svc_info
= getservbyname (SSDATA (service
),
3148 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3150 error ("Unknown service: %s", SDATA (service
));
3151 port
= svc_info
->s_port
;
3154 memset (&address_in
, 0, sizeof address_in
);
3155 address_in
.sin_family
= family
;
3156 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3157 address_in
.sin_port
= port
;
3159 #ifndef HAVE_GETADDRINFO
3162 struct hostent
*host_info_ptr
;
3164 /* gethostbyname may fail with TRY_AGAIN, but we don't honor that,
3165 as it may `hang' Emacs for a very long time. */
3169 #ifdef HAVE_RES_INIT
3173 host_info_ptr
= gethostbyname (SDATA (host
));
3178 memcpy (&address_in
.sin_addr
, host_info_ptr
->h_addr
,
3179 host_info_ptr
->h_length
);
3180 family
= host_info_ptr
->h_addrtype
;
3181 address_in
.sin_family
= family
;
3184 /* Attempt to interpret host as numeric inet address */
3186 unsigned long numeric_addr
;
3187 numeric_addr
= inet_addr (SSDATA (host
));
3188 if (numeric_addr
== -1)
3189 error ("Unknown host \"%s\"", SDATA (host
));
3191 memcpy (&address_in
.sin_addr
, &numeric_addr
,
3192 sizeof (address_in
.sin_addr
));
3196 #endif /* not HAVE_GETADDRINFO */
3198 ai
.ai_family
= family
;
3199 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3200 ai
.ai_addrlen
= sizeof address_in
;
3204 /* Do this in case we never enter the for-loop below. */
3205 count1
= SPECPDL_INDEX ();
3208 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3217 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3224 #ifdef DATAGRAM_SOCKETS
3225 if (!is_server
&& socktype
== SOCK_DGRAM
)
3227 #endif /* DATAGRAM_SOCKETS */
3229 #ifdef NON_BLOCKING_CONNECT
3230 if (is_non_blocking_client
)
3233 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3235 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3247 /* Make us close S if quit. */
3248 record_unwind_protect (close_file_unwind
, make_number (s
));
3250 /* Parse network options in the arg list.
3251 We simply ignore anything which isn't a known option (including other keywords).
3252 An error is signaled if setting a known option fails. */
3253 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3254 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3258 /* Configure as a server socket. */
3260 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3261 explicit :reuseaddr key to override this. */
3262 #ifdef HAVE_LOCAL_SOCKETS
3263 if (family
!= AF_LOCAL
)
3265 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3268 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3269 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3272 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3273 report_file_error ("Cannot bind server socket", Qnil
);
3275 #ifdef HAVE_GETSOCKNAME
3276 if (EQ (service
, Qt
))
3278 struct sockaddr_in sa1
;
3279 socklen_t len1
= sizeof (sa1
);
3280 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3282 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3283 service
= make_number (ntohs (sa1
.sin_port
));
3284 contact
= Fplist_put (contact
, QCservice
, service
);
3289 if (socktype
!= SOCK_DGRAM
&& listen (s
, backlog
))
3290 report_file_error ("Cannot listen on server socket", Qnil
);
3298 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3301 if (ret
== 0 || xerrno
== EISCONN
)
3303 /* The unwind-protect will be discarded afterwards.
3304 Likewise for immediate_quit. */
3308 #ifdef NON_BLOCKING_CONNECT
3310 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3314 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3321 if (xerrno
== EINTR
)
3323 /* Unlike most other syscalls connect() cannot be called
3324 again. (That would return EALREADY.) The proper way to
3325 wait for completion is pselect(). */
3333 sc
= pselect (s
+ 1, NULL
, &fdset
, NULL
, NULL
, NULL
);
3339 report_file_error ("select failed", Qnil
);
3343 len
= sizeof xerrno
;
3344 eassert (FD_ISSET (s
, &fdset
));
3345 if (getsockopt (s
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &len
) == -1)
3346 report_file_error ("getsockopt failed", Qnil
);
3348 errno
= xerrno
, report_file_error ("error during connect", Qnil
);
3352 #endif /* !WINDOWSNT */
3356 /* Discard the unwind protect closing S. */
3357 specpdl_ptr
= specpdl
+ count1
;
3362 if (xerrno
== EINTR
)
3369 #ifdef DATAGRAM_SOCKETS
3370 if (socktype
== SOCK_DGRAM
)
3372 if (datagram_address
[s
].sa
)
3374 datagram_address
[s
].sa
= xmalloc (lres
->ai_addrlen
);
3375 datagram_address
[s
].len
= lres
->ai_addrlen
;
3379 memset (datagram_address
[s
].sa
, 0, lres
->ai_addrlen
);
3380 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3383 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3384 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3385 conv_lisp_to_sockaddr (rfamily
, remote
,
3386 datagram_address
[s
].sa
, rlen
);
3390 memcpy (datagram_address
[s
].sa
, lres
->ai_addr
, lres
->ai_addrlen
);
3393 contact
= Fplist_put (contact
, QCaddress
,
3394 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3395 #ifdef HAVE_GETSOCKNAME
3398 struct sockaddr_in sa1
;
3399 socklen_t len1
= sizeof (sa1
);
3400 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3401 contact
= Fplist_put (contact
, QClocal
,
3402 conv_sockaddr_to_lisp ((struct sockaddr
*)&sa1
, len1
));
3409 #ifdef HAVE_GETADDRINFO
3418 /* Discard the unwind protect for closing S, if any. */
3419 specpdl_ptr
= specpdl
+ count1
;
3421 /* Unwind bind_polling_period and request_sigio. */
3422 unbind_to (count
, Qnil
);
3426 /* If non-blocking got this far - and failed - assume non-blocking is
3427 not supported after all. This is probably a wrong assumption, but
3428 the normal blocking calls to open-network-stream handles this error
3430 if (is_non_blocking_client
)
3435 report_file_error ("make server process failed", contact
);
3437 report_file_error ("make client process failed", contact
);
3444 buffer
= Fget_buffer_create (buffer
);
3445 proc
= make_process (name
);
3447 chan_process
[inch
] = proc
;
3450 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3453 fcntl (inch
, F_SETFL
, O_NDELAY
);
3457 p
= XPROCESS (proc
);
3459 pset_childp (p
, contact
);
3460 pset_plist (p
, Fcopy_sequence (Fplist_get (contact
, QCplist
)));
3461 pset_type (p
, Qnetwork
);
3463 pset_buffer (p
, buffer
);
3464 pset_sentinel (p
, sentinel
);
3465 pset_filter (p
, filter
);
3466 pset_log (p
, Fplist_get (contact
, QClog
));
3467 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3468 p
->kill_without_query
= 1;
3469 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3470 pset_command (p
, Qt
);
3474 if (is_server
&& socktype
!= SOCK_DGRAM
)
3475 pset_status (p
, Qlisten
);
3477 /* Make the process marker point into the process buffer (if any). */
3478 if (BUFFERP (buffer
))
3479 set_marker_both (p
->mark
, buffer
,
3480 BUF_ZV (XBUFFER (buffer
)),
3481 BUF_ZV_BYTE (XBUFFER (buffer
)));
3483 #ifdef NON_BLOCKING_CONNECT
3484 if (is_non_blocking_client
)
3486 /* We may get here if connect did succeed immediately. However,
3487 in that case, we still need to signal this like a non-blocking
3489 pset_status (p
, Qconnect
);
3490 if (!FD_ISSET (inch
, &connect_wait_mask
))
3492 FD_SET (inch
, &connect_wait_mask
);
3493 FD_SET (inch
, &write_mask
);
3494 num_pending_connects
++;
3499 /* A server may have a client filter setting of Qt, but it must
3500 still listen for incoming connects unless it is stopped. */
3501 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3502 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3504 FD_SET (inch
, &input_wait_mask
);
3505 FD_SET (inch
, &non_keyboard_wait_mask
);
3508 if (inch
> max_process_desc
)
3509 max_process_desc
= inch
;
3511 tem
= Fplist_member (contact
, QCcoding
);
3512 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3513 tem
= Qnil
; /* No error message (too late!). */
3516 /* Setup coding systems for communicating with the network stream. */
3517 struct gcpro gcpro1
;
3518 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3519 Lisp_Object coding_systems
= Qt
;
3520 Lisp_Object fargs
[5], val
;
3524 val
= XCAR (XCDR (tem
));
3528 else if (!NILP (Vcoding_system_for_read
))
3529 val
= Vcoding_system_for_read
;
3530 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
3531 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
3532 /* We dare not decode end-of-line format by setting VAL to
3533 Qraw_text, because the existing Emacs Lisp libraries
3534 assume that they receive bare code including a sequence of
3539 if (NILP (host
) || NILP (service
))
3540 coding_systems
= Qnil
;
3543 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3544 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3546 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3549 if (CONSP (coding_systems
))
3550 val
= XCAR (coding_systems
);
3551 else if (CONSP (Vdefault_process_coding_system
))
3552 val
= XCAR (Vdefault_process_coding_system
);
3556 pset_decode_coding_system (p
, val
);
3560 val
= XCAR (XCDR (tem
));
3564 else if (!NILP (Vcoding_system_for_write
))
3565 val
= Vcoding_system_for_write
;
3566 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3570 if (EQ (coding_systems
, Qt
))
3572 if (NILP (host
) || NILP (service
))
3573 coding_systems
= Qnil
;
3576 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3577 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3579 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3583 if (CONSP (coding_systems
))
3584 val
= XCDR (coding_systems
);
3585 else if (CONSP (Vdefault_process_coding_system
))
3586 val
= XCDR (Vdefault_process_coding_system
);
3590 pset_encode_coding_system (p
, val
);
3592 setup_process_coding_systems (proc
);
3594 pset_decoding_buf (p
, empty_unibyte_string
);
3595 p
->decoding_carryover
= 0;
3596 pset_encoding_buf (p
, empty_unibyte_string
);
3598 p
->inherit_coding_system_flag
3599 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3606 #if defined (HAVE_NET_IF_H)
3609 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3610 doc
: /* Return an alist of all network interfaces and their network address.
3611 Each element is a cons, the car of which is a string containing the
3612 interface name, and the cdr is the network address in internal
3613 format; see the description of ADDRESS in `make-network-process'. */)
3616 struct ifconf ifconf
;
3617 struct ifreq
*ifreq
;
3619 ptrdiff_t buf_size
= 512;
3623 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3629 buf
= xpalloc (buf
, &buf_size
, 1, INT_MAX
, 1);
3630 ifconf
.ifc_buf
= buf
;
3631 ifconf
.ifc_len
= buf_size
;
3632 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3639 while (ifconf
.ifc_len
== buf_size
);
3644 ifreq
= ifconf
.ifc_req
;
3645 while ((char *) ifreq
< (char *) ifconf
.ifc_req
+ ifconf
.ifc_len
)
3647 struct ifreq
*ifq
= ifreq
;
3648 #ifdef HAVE_STRUCT_IFREQ_IFR_ADDR_SA_LEN
3649 #define SIZEOF_IFREQ(sif) \
3650 ((sif)->ifr_addr.sa_len < sizeof (struct sockaddr) \
3651 ? sizeof (*(sif)) : sizeof ((sif)->ifr_name) + (sif)->ifr_addr.sa_len)
3653 int len
= SIZEOF_IFREQ (ifq
);
3655 int len
= sizeof (*ifreq
);
3657 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3659 ifreq
= (struct ifreq
*) ((char *) ifreq
+ len
);
3661 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3664 memcpy (namebuf
, ifq
->ifr_name
, sizeof (ifq
->ifr_name
));
3665 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3666 res
= Fcons (Fcons (build_string (namebuf
),
3667 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3668 sizeof (struct sockaddr
))),
3675 #endif /* SIOCGIFCONF */
3677 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
3681 const char *flag_sym
;
3684 static const struct ifflag_def ifflag_table
[] = {
3688 #ifdef IFF_BROADCAST
3689 { IFF_BROADCAST
, "broadcast" },
3692 { IFF_DEBUG
, "debug" },
3695 { IFF_LOOPBACK
, "loopback" },
3697 #ifdef IFF_POINTOPOINT
3698 { IFF_POINTOPOINT
, "pointopoint" },
3701 { IFF_RUNNING
, "running" },
3704 { IFF_NOARP
, "noarp" },
3707 { IFF_PROMISC
, "promisc" },
3709 #ifdef IFF_NOTRAILERS
3710 #ifdef NS_IMPL_COCOA
3711 /* Really means smart, notrailers is obsolete */
3712 { IFF_NOTRAILERS
, "smart" },
3714 { IFF_NOTRAILERS
, "notrailers" },
3718 { IFF_ALLMULTI
, "allmulti" },
3721 { IFF_MASTER
, "master" },
3724 { IFF_SLAVE
, "slave" },
3726 #ifdef IFF_MULTICAST
3727 { IFF_MULTICAST
, "multicast" },
3730 { IFF_PORTSEL
, "portsel" },
3732 #ifdef IFF_AUTOMEDIA
3733 { IFF_AUTOMEDIA
, "automedia" },
3736 { IFF_DYNAMIC
, "dynamic" },
3739 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3742 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3745 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3748 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3751 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3756 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3757 doc
: /* Return information about network interface named IFNAME.
3758 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3759 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3760 NETMASK is the layer 3 network mask, HWADDR is the layer 2 address, and
3761 FLAGS is the current flags of the interface. */)
3762 (Lisp_Object ifname
)
3765 Lisp_Object res
= Qnil
;
3769 #if (! (defined SIOCGIFHWADDR && defined HAVE_STRUCT_IFREQ_IFR_HWADDR) \
3770 && defined HAVE_GETIFADDRS && defined LLADDR)
3771 struct ifaddrs
*ifap
;
3774 CHECK_STRING (ifname
);
3776 if (sizeof rq
.ifr_name
<= SBYTES (ifname
))
3777 error ("interface name too long");
3778 strcpy (rq
.ifr_name
, SSDATA (ifname
));
3780 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3785 #if defined (SIOCGIFFLAGS) && defined (HAVE_STRUCT_IFREQ_IFR_FLAGS)
3786 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3788 int flags
= rq
.ifr_flags
;
3789 const struct ifflag_def
*fp
;
3792 /* If flags is smaller than int (i.e. short) it may have the high bit set
3793 due to IFF_MULTICAST. In that case, sign extending it into
3795 if (flags
< 0 && sizeof (rq
.ifr_flags
) < sizeof (flags
))
3796 flags
= (unsigned short) rq
.ifr_flags
;
3799 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3801 if (flags
& fp
->flag_bit
)
3803 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3804 flags
-= fp
->flag_bit
;
3807 for (fnum
= 0; flags
&& fnum
< 32; flags
>>= 1, fnum
++)
3811 elt
= Fcons (make_number (fnum
), elt
);
3816 res
= Fcons (elt
, res
);
3819 #if defined (SIOCGIFHWADDR) && defined (HAVE_STRUCT_IFREQ_IFR_HWADDR)
3820 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3822 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3823 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3827 for (n
= 0; n
< 6; n
++)
3828 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3829 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3831 #elif defined (HAVE_GETIFADDRS) && defined (LLADDR)
3832 if (getifaddrs (&ifap
) != -1)
3834 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3835 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3838 for (it
= ifap
; it
!= NULL
; it
= it
->ifa_next
)
3840 struct sockaddr_dl
*sdl
= (struct sockaddr_dl
*) it
->ifa_addr
;
3841 unsigned char linkaddr
[6];
3844 if (it
->ifa_addr
->sa_family
!= AF_LINK
3845 || strcmp (it
->ifa_name
, SSDATA (ifname
)) != 0
3846 || sdl
->sdl_alen
!= 6)
3849 memcpy (linkaddr
, LLADDR (sdl
), sdl
->sdl_alen
);
3850 for (n
= 0; n
< 6; n
++)
3851 p
->contents
[n
] = make_number (linkaddr
[n
]);
3853 elt
= Fcons (make_number (it
->ifa_addr
->sa_family
), hwaddr
);
3857 #ifdef HAVE_FREEIFADDRS
3861 #endif /* HAVE_GETIFADDRS && LLADDR */
3863 res
= Fcons (elt
, res
);
3866 #if defined (SIOCGIFNETMASK) && (defined (HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined (HAVE_STRUCT_IFREQ_IFR_ADDR))
3867 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3870 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
3871 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3873 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3877 res
= Fcons (elt
, res
);
3880 #if defined (SIOCGIFBRDADDR) && defined (HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3881 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3884 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3887 res
= Fcons (elt
, res
);
3890 #if defined (SIOCGIFADDR) && defined (HAVE_STRUCT_IFREQ_IFR_ADDR)
3891 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3894 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3897 res
= Fcons (elt
, res
);
3901 return any
? res
: Qnil
;
3904 #endif /* defined (HAVE_NET_IF_H) */
3906 /* Turn off input and output for process PROC. */
3909 deactivate_process (Lisp_Object proc
)
3911 register int inchannel
, outchannel
;
3912 register struct Lisp_Process
*p
= XPROCESS (proc
);
3915 /* Delete GnuTLS structures in PROC, if any. */
3916 emacs_gnutls_deinit (proc
);
3917 #endif /* HAVE_GNUTLS */
3919 inchannel
= p
->infd
;
3920 outchannel
= p
->outfd
;
3922 #ifdef ADAPTIVE_READ_BUFFERING
3923 if (p
->read_output_delay
> 0)
3925 if (--process_output_delay_count
< 0)
3926 process_output_delay_count
= 0;
3927 p
->read_output_delay
= 0;
3928 p
->read_output_skip
= 0;
3934 /* Beware SIGCHLD hereabouts. */
3935 flush_pending_output (inchannel
);
3936 emacs_close (inchannel
);
3937 if (outchannel
>= 0 && outchannel
!= inchannel
)
3938 emacs_close (outchannel
);
3942 #ifdef DATAGRAM_SOCKETS
3943 if (DATAGRAM_CHAN_P (inchannel
))
3945 xfree (datagram_address
[inchannel
].sa
);
3946 datagram_address
[inchannel
].sa
= 0;
3947 datagram_address
[inchannel
].len
= 0;
3950 chan_process
[inchannel
] = Qnil
;
3951 FD_CLR (inchannel
, &input_wait_mask
);
3952 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3953 #ifdef NON_BLOCKING_CONNECT
3954 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3956 FD_CLR (inchannel
, &connect_wait_mask
);
3957 FD_CLR (inchannel
, &write_mask
);
3958 if (--num_pending_connects
< 0)
3962 if (inchannel
== max_process_desc
)
3965 /* We just closed the highest-numbered process input descriptor,
3966 so recompute the highest-numbered one now. */
3967 max_process_desc
= 0;
3968 for (i
= 0; i
< MAXDESC
; i
++)
3969 if (!NILP (chan_process
[i
]))
3970 max_process_desc
= i
;
3976 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3978 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3979 It is read into the process' buffers or given to their filter functions.
3980 Non-nil arg PROCESS means do not return until some output has been received
3983 Non-nil second arg SECONDS and third arg MILLISEC are number of seconds
3984 and milliseconds to wait; return after that much time whether or not
3985 there is any subprocess output. If SECONDS is a floating point number,
3986 it specifies a fractional number of seconds to wait.
3987 The MILLISEC argument is obsolete and should be avoided.
3989 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
3990 from PROCESS, suspending reading output from other processes.
3991 If JUST-THIS-ONE is an integer, don't run any timers either.
3992 Return non-nil if we received any output before the timeout expired. */)
3993 (register Lisp_Object process
, Lisp_Object seconds
, Lisp_Object millisec
, Lisp_Object just_this_one
)
3998 if (! NILP (process
))
3999 CHECK_PROCESS (process
);
4001 just_this_one
= Qnil
;
4003 if (!NILP (millisec
))
4004 { /* Obsolete calling convention using integers rather than floats. */
4005 CHECK_NUMBER (millisec
);
4007 seconds
= make_float (XINT (millisec
) / 1000.0);
4010 CHECK_NUMBER (seconds
);
4011 seconds
= make_float (XINT (millisec
) / 1000.0 + XINT (seconds
));
4018 if (!NILP (seconds
))
4020 if (INTEGERP (seconds
))
4022 if (0 < XINT (seconds
))
4024 secs
= XINT (seconds
);
4028 else if (FLOATP (seconds
))
4030 if (0 < XFLOAT_DATA (seconds
))
4032 EMACS_TIME t
= EMACS_TIME_FROM_DOUBLE (XFLOAT_DATA (seconds
));
4033 secs
= min (EMACS_SECS (t
), WAIT_READING_MAX
);
4034 nsecs
= EMACS_NSECS (t
);
4038 wrong_type_argument (Qnumberp
, seconds
);
4040 else if (! NILP (process
))
4044 (wait_reading_process_output (secs
, nsecs
, 0, 0,
4046 !NILP (process
) ? XPROCESS (process
) : NULL
,
4047 NILP (just_this_one
) ? 0 :
4048 !INTEGERP (just_this_one
) ? 1 : -1)
4052 /* Accept a connection for server process SERVER on CHANNEL. */
4054 static int connect_counter
= 0;
4057 server_accept_connection (Lisp_Object server
, int channel
)
4059 Lisp_Object proc
, caller
, name
, buffer
;
4060 Lisp_Object contact
, host
, service
;
4061 struct Lisp_Process
*ps
= XPROCESS (server
);
4062 struct Lisp_Process
*p
;
4066 struct sockaddr_in in
;
4068 struct sockaddr_in6 in6
;
4070 #ifdef HAVE_LOCAL_SOCKETS
4071 struct sockaddr_un un
;
4074 socklen_t len
= sizeof saddr
;
4076 s
= accept (channel
, &saddr
.sa
, &len
);
4085 if (code
== EWOULDBLOCK
)
4089 if (!NILP (ps
->log
))
4090 call3 (ps
->log
, server
, Qnil
,
4091 concat3 (build_string ("accept failed with code"),
4092 Fnumber_to_string (make_number (code
)),
4093 build_string ("\n")));
4099 /* Setup a new process to handle the connection. */
4101 /* Generate a unique identification of the caller, and build contact
4102 information for this process. */
4105 switch (saddr
.sa
.sa_family
)
4109 Lisp_Object args
[5];
4110 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4111 args
[0] = build_string ("%d.%d.%d.%d");
4112 args
[1] = make_number (*ip
++);
4113 args
[2] = make_number (*ip
++);
4114 args
[3] = make_number (*ip
++);
4115 args
[4] = make_number (*ip
++);
4116 host
= Fformat (5, args
);
4117 service
= make_number (ntohs (saddr
.in
.sin_port
));
4119 args
[0] = build_string (" <%s:%d>");
4122 caller
= Fformat (3, args
);
4129 Lisp_Object args
[9];
4130 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4132 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4133 for (i
= 0; i
< 8; i
++)
4134 args
[i
+1] = make_number (ntohs (ip6
[i
]));
4135 host
= Fformat (9, args
);
4136 service
= make_number (ntohs (saddr
.in
.sin_port
));
4138 args
[0] = build_string (" <[%s]:%d>");
4141 caller
= Fformat (3, args
);
4146 #ifdef HAVE_LOCAL_SOCKETS
4150 caller
= Fnumber_to_string (make_number (connect_counter
));
4151 caller
= concat3 (build_string (" <"), caller
, build_string (">"));
4155 /* Create a new buffer name for this process if it doesn't have a
4156 filter. The new buffer name is based on the buffer name or
4157 process name of the server process concatenated with the caller
4160 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4164 buffer
= ps
->buffer
;
4166 buffer
= Fbuffer_name (buffer
);
4171 buffer
= concat2 (buffer
, caller
);
4172 buffer
= Fget_buffer_create (buffer
);
4176 /* Generate a unique name for the new server process. Combine the
4177 server process name with the caller identification. */
4179 name
= concat2 (ps
->name
, caller
);
4180 proc
= make_process (name
);
4182 chan_process
[s
] = proc
;
4185 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4188 fcntl (s
, F_SETFL
, O_NDELAY
);
4192 p
= XPROCESS (proc
);
4194 /* Build new contact information for this setup. */
4195 contact
= Fcopy_sequence (ps
->childp
);
4196 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4197 contact
= Fplist_put (contact
, QChost
, host
);
4198 if (!NILP (service
))
4199 contact
= Fplist_put (contact
, QCservice
, service
);
4200 contact
= Fplist_put (contact
, QCremote
,
4201 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4202 #ifdef HAVE_GETSOCKNAME
4204 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4205 contact
= Fplist_put (contact
, QClocal
,
4206 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4209 pset_childp (p
, contact
);
4210 pset_plist (p
, Fcopy_sequence (ps
->plist
));
4211 pset_type (p
, Qnetwork
);
4213 pset_buffer (p
, buffer
);
4214 pset_sentinel (p
, ps
->sentinel
);
4215 pset_filter (p
, ps
->filter
);
4216 pset_command (p
, Qnil
);
4220 pset_status (p
, Qrun
);
4222 /* Client processes for accepted connections are not stopped initially. */
4223 if (!EQ (p
->filter
, Qt
))
4225 FD_SET (s
, &input_wait_mask
);
4226 FD_SET (s
, &non_keyboard_wait_mask
);
4229 if (s
> max_process_desc
)
4230 max_process_desc
= s
;
4232 /* Setup coding system for new process based on server process.
4233 This seems to be the proper thing to do, as the coding system
4234 of the new process should reflect the settings at the time the
4235 server socket was opened; not the current settings. */
4237 pset_decode_coding_system (p
, ps
->decode_coding_system
);
4238 pset_encode_coding_system (p
, ps
->encode_coding_system
);
4239 setup_process_coding_systems (proc
);
4241 pset_decoding_buf (p
, empty_unibyte_string
);
4242 p
->decoding_carryover
= 0;
4243 pset_encoding_buf (p
, empty_unibyte_string
);
4245 p
->inherit_coding_system_flag
4246 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4248 if (!NILP (ps
->log
))
4249 call3 (ps
->log
, server
, proc
,
4250 concat3 (build_string ("accept from "),
4251 (STRINGP (host
) ? host
: build_string ("-")),
4252 build_string ("\n")));
4254 if (!NILP (p
->sentinel
))
4255 exec_sentinel (proc
,
4256 concat3 (build_string ("open from "),
4257 (STRINGP (host
) ? host
: build_string ("-")),
4258 build_string ("\n")));
4261 /* This variable is different from waiting_for_input in keyboard.c.
4262 It is used to communicate to a lisp process-filter/sentinel (via the
4263 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4264 for user-input when that process-filter was called.
4265 waiting_for_input cannot be used as that is by definition 0 when
4266 lisp code is being evalled.
4267 This is also used in record_asynch_buffer_change.
4268 For that purpose, this must be 0
4269 when not inside wait_reading_process_output. */
4270 static int waiting_for_user_input_p
;
4273 wait_reading_process_output_unwind (Lisp_Object data
)
4275 waiting_for_user_input_p
= XINT (data
);
4279 /* This is here so breakpoints can be put on it. */
4281 wait_reading_process_output_1 (void)
4285 /* Read and dispose of subprocess output while waiting for timeout to
4286 elapse and/or keyboard input to be available.
4290 If negative, gobble data immediately available but don't wait for any.
4293 an additional duration to wait, measured in nanoseconds
4294 If TIME_LIMIT is zero, then:
4295 If NSECS == 0, there is no limit.
4296 If NSECS > 0, the timeout consists of NSECS only.
4297 If NSECS < 0, gobble data immediately, as if TIME_LIMIT were negative.
4300 0 to ignore keyboard input, or
4301 1 to return when input is available, or
4302 -1 meaning caller will actually read the input, so don't throw to
4303 the quit handler, or
4305 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4306 output that arrives.
4308 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4309 (and gobble terminal input into the buffer if any arrives).
4311 If WAIT_PROC is specified, wait until something arrives from that
4312 process. The return value is true if we read some input from
4315 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4316 (suspending output from other processes). A negative value
4317 means don't run any timers either.
4319 If WAIT_PROC is specified, then the function returns true if we
4320 received input from that process before the timeout elapsed.
4321 Otherwise, return true if we received input from any process. */
4324 wait_reading_process_output (intmax_t time_limit
, int nsecs
, int read_kbd
,
4326 Lisp_Object wait_for_cell
,
4327 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
4329 register int channel
, nfds
;
4330 SELECT_TYPE Available
;
4331 SELECT_TYPE Writeok
;
4333 int check_delay
, no_avail
;
4336 EMACS_TIME timeout
, end_time
;
4337 int wait_channel
= -1;
4338 int got_some_input
= 0;
4339 ptrdiff_t count
= SPECPDL_INDEX ();
4341 FD_ZERO (&Available
);
4344 if (time_limit
== 0 && nsecs
== 0 && wait_proc
&& !NILP (Vinhibit_quit
)
4345 && !(CONSP (wait_proc
->status
)
4346 && EQ (XCAR (wait_proc
->status
), Qexit
)))
4347 message ("Blocking call to accept-process-output with quit inhibited!!");
4349 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4350 if (wait_proc
!= NULL
)
4351 wait_channel
= wait_proc
->infd
;
4353 record_unwind_protect (wait_reading_process_output_unwind
,
4354 make_number (waiting_for_user_input_p
));
4355 waiting_for_user_input_p
= read_kbd
;
4362 else if (TYPE_MAXIMUM (time_t) < time_limit
)
4363 time_limit
= TYPE_MAXIMUM (time_t);
4365 /* Since we may need to wait several times,
4366 compute the absolute time to return at. */
4367 if (time_limit
|| 0 < nsecs
)
4369 timeout
= make_emacs_time (time_limit
, nsecs
);
4370 end_time
= add_emacs_time (current_emacs_time (), timeout
);
4375 int timeout_reduced_for_timers
= 0;
4377 /* If calling from keyboard input, do not quit
4378 since we want to return C-g as an input character.
4379 Otherwise, do pending quit if requested. */
4382 else if (pending_signals
)
4383 process_pending_signals ();
4385 /* Exit now if the cell we're waiting for became non-nil. */
4386 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4389 /* Compute time from now till when time limit is up */
4390 /* Exit if already run out */
4393 /* A negative timeout means
4394 gobble output available now
4395 but don't wait at all. */
4397 timeout
= make_emacs_time (0, 0);
4399 else if (time_limit
|| 0 < nsecs
)
4401 EMACS_TIME now
= current_emacs_time ();
4402 if (EMACS_TIME_LE (end_time
, now
))
4404 timeout
= sub_emacs_time (end_time
, now
);
4408 timeout
= make_emacs_time (100000, 0);
4411 /* Normally we run timers here.
4412 But not if wait_for_cell; in those cases,
4413 the wait is supposed to be short,
4414 and those callers cannot handle running arbitrary Lisp code here. */
4415 if (NILP (wait_for_cell
)
4416 && just_wait_proc
>= 0)
4418 EMACS_TIME timer_delay
;
4422 int old_timers_run
= timers_run
;
4423 struct buffer
*old_buffer
= current_buffer
;
4424 Lisp_Object old_window
= selected_window
;
4426 timer_delay
= timer_check ();
4428 /* If a timer has run, this might have changed buffers
4429 an alike. Make read_key_sequence aware of that. */
4430 if (timers_run
!= old_timers_run
4431 && (old_buffer
!= current_buffer
4432 || !EQ (old_window
, selected_window
))
4433 && waiting_for_user_input_p
== -1)
4434 record_asynch_buffer_change ();
4436 if (timers_run
!= old_timers_run
&& do_display
)
4437 /* We must retry, since a timer may have requeued itself
4438 and that could alter the time_delay. */
4439 redisplay_preserve_echo_area (9);
4443 while (!detect_input_pending ());
4445 /* If there is unread keyboard input, also return. */
4447 && requeued_events_pending_p ())
4450 /* A negative timeout means do not wait at all. */
4453 if (EMACS_TIME_VALID_P (timer_delay
))
4455 if (EMACS_TIME_LT (timer_delay
, timeout
))
4457 timeout
= timer_delay
;
4458 timeout_reduced_for_timers
= 1;
4463 /* This is so a breakpoint can be put here. */
4464 wait_reading_process_output_1 ();
4469 /* Cause C-g and alarm signals to take immediate action,
4470 and cause input available signals to zero out timeout.
4472 It is important that we do this before checking for process
4473 activity. If we get a SIGCHLD after the explicit checks for
4474 process activity, timeout is the only way we will know. */
4476 set_waiting_for_input (&timeout
);
4478 /* If status of something has changed, and no input is
4479 available, notify the user of the change right away. After
4480 this explicit check, we'll let the SIGCHLD handler zap
4481 timeout to get our attention. */
4482 if (update_tick
!= process_tick
)
4487 if (kbd_on_hold_p ())
4490 Atemp
= input_wait_mask
;
4493 timeout
= make_emacs_time (0, 0);
4494 if ((pselect (max (max_process_desc
, max_input_desc
) + 1,
4496 #ifdef NON_BLOCKING_CONNECT
4497 (num_pending_connects
> 0 ? &Ctemp
: NULL
),
4501 NULL
, &timeout
, NULL
)
4504 /* It's okay for us to do this and then continue with
4505 the loop, since timeout has already been zeroed out. */
4506 clear_waiting_for_input ();
4507 status_notify (NULL
);
4508 if (do_display
) redisplay_preserve_echo_area (13);
4512 /* Don't wait for output from a non-running process. Just
4513 read whatever data has already been received. */
4514 if (wait_proc
&& wait_proc
->raw_status_new
)
4515 update_status (wait_proc
);
4517 && ! EQ (wait_proc
->status
, Qrun
)
4518 && ! EQ (wait_proc
->status
, Qconnect
))
4520 int nread
, total_nread
= 0;
4522 clear_waiting_for_input ();
4523 XSETPROCESS (proc
, wait_proc
);
4525 /* Read data from the process, until we exhaust it. */
4526 while (wait_proc
->infd
>= 0)
4528 nread
= read_process_output (proc
, wait_proc
->infd
);
4535 total_nread
+= nread
;
4539 else if (nread
== -1 && EIO
== errno
)
4543 else if (nread
== -1 && EAGAIN
== errno
)
4547 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4551 if (total_nread
> 0 && do_display
)
4552 redisplay_preserve_echo_area (10);
4557 /* Wait till there is something to do */
4559 if (wait_proc
&& just_wait_proc
)
4561 if (wait_proc
->infd
< 0) /* Terminated */
4563 FD_SET (wait_proc
->infd
, &Available
);
4567 else if (!NILP (wait_for_cell
))
4569 Available
= non_process_wait_mask
;
4576 Available
= non_keyboard_wait_mask
;
4578 Available
= input_wait_mask
;
4579 Writeok
= write_mask
;
4580 #ifdef SELECT_CANT_DO_WRITE_MASK
4585 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4588 /* If frame size has changed or the window is newly mapped,
4589 redisplay now, before we start to wait. There is a race
4590 condition here; if a SIGIO arrives between now and the select
4591 and indicates that a frame is trashed, the select may block
4592 displaying a trashed screen. */
4593 if (frame_garbaged
&& do_display
)
4595 clear_waiting_for_input ();
4596 redisplay_preserve_echo_area (11);
4598 set_waiting_for_input (&timeout
);
4601 /* Skip the `select' call if input is available and we're
4602 waiting for keyboard input or a cell change (which can be
4603 triggered by processing X events). In the latter case, set
4604 nfds to 1 to avoid breaking the loop. */
4606 if ((read_kbd
|| !NILP (wait_for_cell
))
4607 && detect_input_pending ())
4609 nfds
= read_kbd
? 0 : 1;
4616 #ifdef ADAPTIVE_READ_BUFFERING
4617 /* Set the timeout for adaptive read buffering if any
4618 process has non-zero read_output_skip and non-zero
4619 read_output_delay, and we are not reading output for a
4620 specific wait_channel. It is not executed if
4621 Vprocess_adaptive_read_buffering is nil. */
4622 if (process_output_skip
&& check_delay
> 0)
4624 int nsecs
= EMACS_NSECS (timeout
);
4625 if (EMACS_SECS (timeout
) > 0 || nsecs
> READ_OUTPUT_DELAY_MAX
)
4626 nsecs
= READ_OUTPUT_DELAY_MAX
;
4627 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4629 proc
= chan_process
[channel
];
4632 /* Find minimum non-zero read_output_delay among the
4633 processes with non-zero read_output_skip. */
4634 if (XPROCESS (proc
)->read_output_delay
> 0)
4637 if (!XPROCESS (proc
)->read_output_skip
)
4639 FD_CLR (channel
, &Available
);
4640 XPROCESS (proc
)->read_output_skip
= 0;
4641 if (XPROCESS (proc
)->read_output_delay
< nsecs
)
4642 nsecs
= XPROCESS (proc
)->read_output_delay
;
4645 timeout
= make_emacs_time (0, nsecs
);
4646 process_output_skip
= 0;
4650 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
4652 #elif defined (HAVE_NS)
4657 (max (max_process_desc
, max_input_desc
) + 1,
4659 (check_write
? &Writeok
: (SELECT_TYPE
*)0),
4660 NULL
, &timeout
, NULL
);
4663 /* GnuTLS buffers data internally. In lowat mode it leaves
4664 some data in the TCP buffers so that select works, but
4665 with custom pull/push functions we need to check if some
4666 data is available in the buffers manually. */
4671 /* We're not waiting on a specific process, so loop
4672 through all the channels and check for data.
4673 This is a workaround needed for some versions of
4674 the gnutls library -- 2.12.14 has been confirmed
4676 http://comments.gmane.org/gmane.emacs.devel/145074 */
4677 for (channel
= 0; channel
< MAXDESC
; ++channel
)
4678 if (! NILP (chan_process
[channel
]))
4680 struct Lisp_Process
*p
=
4681 XPROCESS (chan_process
[channel
]);
4682 if (p
&& p
->gnutls_p
&& p
->infd
4683 && ((emacs_gnutls_record_check_pending
4688 FD_SET (p
->infd
, &Available
);
4694 /* Check this specific channel. */
4695 if (wait_proc
->gnutls_p
/* Check for valid process. */
4696 /* Do we have pending data? */
4697 && ((emacs_gnutls_record_check_pending
4698 (wait_proc
->gnutls_state
))
4702 /* Set to Available. */
4703 FD_SET (wait_proc
->infd
, &Available
);
4712 /* Make C-g and alarm signals set flags again */
4713 clear_waiting_for_input ();
4715 /* If we woke up due to SIGWINCH, actually change size now. */
4716 do_pending_window_change (0);
4718 if ((time_limit
|| nsecs
) && nfds
== 0 && ! timeout_reduced_for_timers
)
4719 /* We waited the full specified time, so return now. */
4723 if (xerrno
== EINTR
)
4725 else if (xerrno
== EBADF
)
4728 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4729 the child's closure of the pts gives the parent a SIGHUP, and
4730 the ptc file descriptor is automatically closed,
4731 yielding EBADF here or at select() call above.
4732 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4733 in m/ibmrt-aix.h), and here we just ignore the select error.
4734 Cleanup occurs c/o status_notify after SIGCLD. */
4735 no_avail
= 1; /* Cannot depend on values returned */
4741 error ("select error: %s", emacs_strerror (xerrno
));
4746 FD_ZERO (&Available
);
4750 /* Check for keyboard input */
4751 /* If there is any, return immediately
4752 to give it higher priority than subprocesses */
4756 int old_timers_run
= timers_run
;
4757 struct buffer
*old_buffer
= current_buffer
;
4758 Lisp_Object old_window
= selected_window
;
4761 if (detect_input_pending_run_timers (do_display
))
4763 swallow_events (do_display
);
4764 if (detect_input_pending_run_timers (do_display
))
4768 /* If a timer has run, this might have changed buffers
4769 an alike. Make read_key_sequence aware of that. */
4770 if (timers_run
!= old_timers_run
4771 && waiting_for_user_input_p
== -1
4772 && (old_buffer
!= current_buffer
4773 || !EQ (old_window
, selected_window
)))
4774 record_asynch_buffer_change ();
4780 /* If there is unread keyboard input, also return. */
4782 && requeued_events_pending_p ())
4785 /* If we are not checking for keyboard input now,
4786 do process events (but don't run any timers).
4787 This is so that X events will be processed.
4788 Otherwise they may have to wait until polling takes place.
4789 That would causes delays in pasting selections, for example.
4791 (We used to do this only if wait_for_cell.) */
4792 if (read_kbd
== 0 && detect_input_pending ())
4794 swallow_events (do_display
);
4795 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4796 if (detect_input_pending ())
4801 /* Exit now if the cell we're waiting for became non-nil. */
4802 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4806 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4807 go read it. This can happen with X on BSD after logging out.
4808 In that case, there really is no input and no SIGIO,
4809 but select says there is input. */
4811 if (read_kbd
&& interrupt_input
4812 && keyboard_bit_set (&Available
) && ! noninteractive
)
4813 handle_input_available_signal (SIGIO
);
4817 got_some_input
|= nfds
> 0;
4819 /* If checking input just got us a size-change event from X,
4820 obey it now if we should. */
4821 if (read_kbd
|| ! NILP (wait_for_cell
))
4822 do_pending_window_change (0);
4824 /* Check for data from a process. */
4825 if (no_avail
|| nfds
== 0)
4828 for (channel
= 0; channel
<= max_input_desc
; ++channel
)
4830 struct fd_callback_data
*d
= &fd_callback_info
[channel
];
4832 && ((d
->condition
& FOR_READ
4833 && FD_ISSET (channel
, &Available
))
4834 || (d
->condition
& FOR_WRITE
4835 && FD_ISSET (channel
, &write_mask
))))
4836 d
->func (channel
, d
->data
);
4839 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4841 if (FD_ISSET (channel
, &Available
)
4842 && FD_ISSET (channel
, &non_keyboard_wait_mask
)
4843 && !FD_ISSET (channel
, &non_process_wait_mask
))
4847 /* If waiting for this channel, arrange to return as
4848 soon as no more input to be processed. No more
4850 if (wait_channel
== channel
)
4856 proc
= chan_process
[channel
];
4860 /* If this is a server stream socket, accept connection. */
4861 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4863 server_accept_connection (proc
, channel
);
4867 /* Read data from the process, starting with our
4868 buffered-ahead character if we have one. */
4870 nread
= read_process_output (proc
, channel
);
4873 /* Since read_process_output can run a filter,
4874 which can call accept-process-output,
4875 don't try to read from any other processes
4876 before doing the select again. */
4877 FD_ZERO (&Available
);
4880 redisplay_preserve_echo_area (12);
4883 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4886 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4887 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4889 else if (nread
== -1 && errno
== EAGAIN
)
4893 else if (nread
== -1 && errno
== EAGAIN
)
4895 /* Note that we cannot distinguish between no input
4896 available now and a closed pipe.
4897 With luck, a closed pipe will be accompanied by
4898 subprocess termination and SIGCHLD. */
4899 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4901 #endif /* O_NDELAY */
4902 #endif /* O_NONBLOCK */
4904 /* On some OSs with ptys, when the process on one end of
4905 a pty exits, the other end gets an error reading with
4906 errno = EIO instead of getting an EOF (0 bytes read).
4907 Therefore, if we get an error reading and errno =
4908 EIO, just continue, because the child process has
4909 exited and should clean itself up soon (e.g. when we
4912 However, it has been known to happen that the SIGCHLD
4913 got lost. So raise the signal again just in case.
4915 else if (nread
== -1 && errno
== EIO
)
4917 struct Lisp_Process
*p
= XPROCESS (proc
);
4919 /* Clear the descriptor now, so we only raise the
4921 FD_CLR (channel
, &input_wait_mask
);
4922 FD_CLR (channel
, &non_keyboard_wait_mask
);
4926 /* If the EIO occurs on a pty, the SIGCHLD handler's
4927 waitpid call will not find the process object to
4928 delete. Do it here. */
4929 p
->tick
= ++process_tick
;
4930 pset_status (p
, Qfailed
);
4933 handle_child_signal (SIGCHLD
);
4935 #endif /* HAVE_PTYS */
4936 /* If we can detect process termination, don't consider the
4937 process gone just because its pipe is closed. */
4939 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4944 /* Preserve status of processes already terminated. */
4945 XPROCESS (proc
)->tick
= ++process_tick
;
4946 deactivate_process (proc
);
4947 if (XPROCESS (proc
)->raw_status_new
)
4948 update_status (XPROCESS (proc
));
4949 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4950 pset_status (XPROCESS (proc
),
4951 list2 (Qexit
, make_number (256)));
4954 #ifdef NON_BLOCKING_CONNECT
4955 if (FD_ISSET (channel
, &Writeok
)
4956 && FD_ISSET (channel
, &connect_wait_mask
))
4958 struct Lisp_Process
*p
;
4960 FD_CLR (channel
, &connect_wait_mask
);
4961 FD_CLR (channel
, &write_mask
);
4962 if (--num_pending_connects
< 0)
4965 proc
= chan_process
[channel
];
4969 p
= XPROCESS (proc
);
4972 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4973 So only use it on systems where it is known to work. */
4975 socklen_t xlen
= sizeof (xerrno
);
4976 if (getsockopt (channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4981 struct sockaddr pname
;
4982 int pnamelen
= sizeof (pname
);
4984 /* If connection failed, getpeername will fail. */
4986 if (getpeername (channel
, &pname
, &pnamelen
) < 0)
4988 /* Obtain connect failure code through error slippage. */
4991 if (errno
== ENOTCONN
&& read (channel
, &dummy
, 1) < 0)
4998 p
->tick
= ++process_tick
;
4999 pset_status (p
, list2 (Qfailed
, make_number (xerrno
)));
5000 deactivate_process (proc
);
5004 pset_status (p
, Qrun
);
5005 /* Execute the sentinel here. If we had relied on
5006 status_notify to do it later, it will read input
5007 from the process before calling the sentinel. */
5008 exec_sentinel (proc
, build_string ("open\n"));
5009 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
5011 FD_SET (p
->infd
, &input_wait_mask
);
5012 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
5016 #endif /* NON_BLOCKING_CONNECT */
5017 } /* end for each file descriptor */
5018 } /* end while exit conditions not met */
5020 unbind_to (count
, Qnil
);
5022 /* If calling from keyboard input, do not quit
5023 since we want to return C-g as an input character.
5024 Otherwise, do pending quit if requested. */
5027 /* Prevent input_pending from remaining set if we quit. */
5028 clear_input_pending ();
5032 return got_some_input
;
5035 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
5038 read_process_output_call (Lisp_Object fun_and_args
)
5040 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
5044 read_process_output_error_handler (Lisp_Object error_val
)
5046 cmd_error_internal (error_val
, "error in process filter: ");
5048 update_echo_area ();
5049 Fsleep_for (make_number (2), Qnil
);
5053 /* Read pending output from the process channel,
5054 starting with our buffered-ahead character if we have one.
5055 Yield number of decoded characters read.
5057 This function reads at most 4096 characters.
5058 If you want to read all available subprocess output,
5059 you must call it repeatedly until it returns zero.
5061 The characters read are decoded according to PROC's coding-system
5065 read_process_output (Lisp_Object proc
, register int channel
)
5067 register ssize_t nbytes
;
5069 register Lisp_Object outstream
;
5070 register struct Lisp_Process
*p
= XPROCESS (proc
);
5071 register ptrdiff_t opoint
;
5072 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5073 int carryover
= p
->decoding_carryover
;
5075 ptrdiff_t count
= SPECPDL_INDEX ();
5076 Lisp_Object odeactivate
;
5078 chars
= alloca (carryover
+ readmax
);
5080 /* See the comment above. */
5081 memcpy (chars
, SDATA (p
->decoding_buf
), carryover
);
5083 #ifdef DATAGRAM_SOCKETS
5084 /* We have a working select, so proc_buffered_char is always -1. */
5085 if (DATAGRAM_CHAN_P (channel
))
5087 socklen_t len
= datagram_address
[channel
].len
;
5088 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5089 0, datagram_address
[channel
].sa
, &len
);
5094 int buffered
= 0 <= proc_buffered_char
[channel
];
5097 chars
[carryover
] = proc_buffered_char
[channel
];
5098 proc_buffered_char
[channel
] = -1;
5102 nbytes
= emacs_gnutls_read (p
, chars
+ carryover
+ buffered
,
5103 readmax
- buffered
);
5106 nbytes
= emacs_read (channel
, chars
+ carryover
+ buffered
,
5107 readmax
- buffered
);
5108 #ifdef ADAPTIVE_READ_BUFFERING
5109 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5111 int delay
= p
->read_output_delay
;
5114 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5117 process_output_delay_count
++;
5118 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5121 else if (delay
> 0 && nbytes
== readmax
- buffered
)
5123 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5125 process_output_delay_count
--;
5127 p
->read_output_delay
= delay
;
5130 p
->read_output_skip
= 1;
5131 process_output_skip
= 1;
5136 nbytes
+= buffered
&& nbytes
<= 0;
5139 p
->decoding_carryover
= 0;
5141 /* At this point, NBYTES holds number of bytes just received
5142 (including the one in proc_buffered_char[channel]). */
5145 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5147 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5150 /* Now set NBYTES how many bytes we must decode. */
5151 nbytes
+= carryover
;
5153 odeactivate
= Vdeactivate_mark
;
5154 /* There's no good reason to let process filters change the current
5155 buffer, and many callers of accept-process-output, sit-for, and
5156 friends don't expect current-buffer to be changed from under them. */
5157 record_unwind_current_buffer ();
5159 /* Read and dispose of the process output. */
5160 outstream
= p
->filter
;
5161 if (!NILP (outstream
))
5164 bool outer_running_asynch_code
= running_asynch_code
;
5165 int waiting
= waiting_for_user_input_p
;
5167 /* No need to gcpro these, because all we do with them later
5168 is test them for EQness, and none of them should be a string. */
5170 Lisp_Object obuffer
, okeymap
;
5171 XSETBUFFER (obuffer
, current_buffer
);
5172 okeymap
= BVAR (current_buffer
, keymap
);
5175 /* We inhibit quit here instead of just catching it so that
5176 hitting ^G when a filter happens to be running won't screw
5178 specbind (Qinhibit_quit
, Qt
);
5179 specbind (Qlast_nonmenu_event
, Qt
);
5181 /* In case we get recursively called,
5182 and we already saved the match data nonrecursively,
5183 save the same match data in safely recursive fashion. */
5184 if (outer_running_asynch_code
)
5187 /* Don't clobber the CURRENT match data, either! */
5188 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5189 restore_search_regs ();
5190 record_unwind_save_match_data ();
5191 Fset_match_data (tem
, Qt
);
5194 /* For speed, if a search happens within this code,
5195 save the match data in a special nonrecursive fashion. */
5196 running_asynch_code
= 1;
5198 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5199 text
= coding
->dst_object
;
5200 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5201 /* A new coding system might be found. */
5202 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5204 pset_decode_coding_system (p
, Vlast_coding_system_used
);
5206 /* Don't call setup_coding_system for
5207 proc_decode_coding_system[channel] here. It is done in
5208 detect_coding called via decode_coding above. */
5210 /* If a coding system for encoding is not yet decided, we set
5211 it as the same as coding-system for decoding.
5213 But, before doing that we must check if
5214 proc_encode_coding_system[p->outfd] surely points to a
5215 valid memory because p->outfd will be changed once EOF is
5216 sent to the process. */
5217 if (NILP (p
->encode_coding_system
)
5218 && proc_encode_coding_system
[p
->outfd
])
5220 pset_encode_coding_system
5221 (p
, coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
));
5222 setup_coding_system (p
->encode_coding_system
,
5223 proc_encode_coding_system
[p
->outfd
]);
5227 if (coding
->carryover_bytes
> 0)
5229 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5230 pset_decoding_buf (p
, make_uninit_string (coding
->carryover_bytes
));
5231 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5232 coding
->carryover_bytes
);
5233 p
->decoding_carryover
= coding
->carryover_bytes
;
5235 if (SBYTES (text
) > 0)
5236 /* FIXME: It's wrong to wrap or not based on debug-on-error, and
5237 sometimes it's simply wrong to wrap (e.g. when called from
5238 accept-process-output). */
5239 internal_condition_case_1 (read_process_output_call
,
5241 Fcons (proc
, Fcons (text
, Qnil
))),
5242 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5243 read_process_output_error_handler
);
5245 /* If we saved the match data nonrecursively, restore it now. */
5246 restore_search_regs ();
5247 running_asynch_code
= outer_running_asynch_code
;
5249 /* Restore waiting_for_user_input_p as it was
5250 when we were called, in case the filter clobbered it. */
5251 waiting_for_user_input_p
= waiting
;
5253 #if 0 /* Call record_asynch_buffer_change unconditionally,
5254 because we might have changed minor modes or other things
5255 that affect key bindings. */
5256 if (! EQ (Fcurrent_buffer (), obuffer
)
5257 || ! EQ (current_buffer
->keymap
, okeymap
))
5259 /* But do it only if the caller is actually going to read events.
5260 Otherwise there's no need to make him wake up, and it could
5261 cause trouble (for example it would make sit_for return). */
5262 if (waiting_for_user_input_p
== -1)
5263 record_asynch_buffer_change ();
5266 /* If no filter, write into buffer if it isn't dead. */
5267 else if (!NILP (p
->buffer
) && BUFFER_LIVE_P (XBUFFER (p
->buffer
)))
5269 Lisp_Object old_read_only
;
5270 ptrdiff_t old_begv
, old_zv
;
5271 ptrdiff_t old_begv_byte
, old_zv_byte
;
5272 ptrdiff_t before
, before_byte
;
5273 ptrdiff_t opoint_byte
;
5277 Fset_buffer (p
->buffer
);
5279 opoint_byte
= PT_BYTE
;
5280 old_read_only
= BVAR (current_buffer
, read_only
);
5283 old_begv_byte
= BEGV_BYTE
;
5284 old_zv_byte
= ZV_BYTE
;
5286 bset_read_only (current_buffer
, Qnil
);
5288 /* Insert new output into buffer
5289 at the current end-of-output marker,
5290 thus preserving logical ordering of input and output. */
5291 if (XMARKER (p
->mark
)->buffer
)
5292 SET_PT_BOTH (clip_to_bounds (BEGV
,
5293 marker_position (p
->mark
), ZV
),
5294 clip_to_bounds (BEGV_BYTE
,
5295 marker_byte_position (p
->mark
),
5298 SET_PT_BOTH (ZV
, ZV_BYTE
);
5300 before_byte
= PT_BYTE
;
5302 /* If the output marker is outside of the visible region, save
5303 the restriction and widen. */
5304 if (! (BEGV
<= PT
&& PT
<= ZV
))
5307 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5308 text
= coding
->dst_object
;
5309 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5310 /* A new coding system might be found. See the comment in the
5311 similar code in the previous `if' block. */
5312 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5314 pset_decode_coding_system (p
, Vlast_coding_system_used
);
5315 if (NILP (p
->encode_coding_system
)
5316 && proc_encode_coding_system
[p
->outfd
])
5318 pset_encode_coding_system
5319 (p
, coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
));
5320 setup_coding_system (p
->encode_coding_system
,
5321 proc_encode_coding_system
[p
->outfd
]);
5324 if (coding
->carryover_bytes
> 0)
5326 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5327 pset_decoding_buf (p
, make_uninit_string (coding
->carryover_bytes
));
5328 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5329 coding
->carryover_bytes
);
5330 p
->decoding_carryover
= coding
->carryover_bytes
;
5332 /* Adjust the multibyteness of TEXT to that of the buffer. */
5333 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
5334 != ! STRING_MULTIBYTE (text
))
5335 text
= (STRING_MULTIBYTE (text
)
5336 ? Fstring_as_unibyte (text
)
5337 : Fstring_to_multibyte (text
));
5338 /* Insert before markers in case we are inserting where
5339 the buffer's mark is, and the user's next command is Meta-y. */
5340 insert_from_string_before_markers (text
, 0, 0,
5341 SCHARS (text
), SBYTES (text
), 0);
5343 /* Make sure the process marker's position is valid when the
5344 process buffer is changed in the signal_after_change above.
5345 W3 is known to do that. */
5346 if (BUFFERP (p
->buffer
)
5347 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5348 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5350 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5352 update_mode_lines
++;
5354 /* Make sure opoint and the old restrictions
5355 float ahead of any new text just as point would. */
5356 if (opoint
>= before
)
5358 opoint
+= PT
- before
;
5359 opoint_byte
+= PT_BYTE
- before_byte
;
5361 if (old_begv
> before
)
5363 old_begv
+= PT
- before
;
5364 old_begv_byte
+= PT_BYTE
- before_byte
;
5366 if (old_zv
>= before
)
5368 old_zv
+= PT
- before
;
5369 old_zv_byte
+= PT_BYTE
- before_byte
;
5372 /* If the restriction isn't what it should be, set it. */
5373 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5374 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5377 bset_read_only (current_buffer
, old_read_only
);
5378 SET_PT_BOTH (opoint
, opoint_byte
);
5380 /* Handling the process output should not deactivate the mark. */
5381 Vdeactivate_mark
= odeactivate
;
5383 unbind_to (count
, Qnil
);
5387 /* Sending data to subprocess */
5389 /* In send_process, when a write fails temporarily,
5390 wait_reading_process_output is called. It may execute user code,
5391 e.g. timers, that attempts to write new data to the same process.
5392 We must ensure that data is sent in the right order, and not
5393 interspersed half-completed with other writes (Bug#10815). This is
5394 handled by the write_queue element of struct process. It is a list
5395 with each entry having the form
5397 (string . (offset . length))
5399 where STRING is a lisp string, OFFSET is the offset into the
5400 string's byte sequence from which we should begin to send, and
5401 LENGTH is the number of bytes left to send. */
5403 /* Create a new entry in write_queue.
5404 INPUT_OBJ should be a buffer, string Qt, or Qnil.
5405 BUF is a pointer to the string sequence of the input_obj or a C
5406 string in case of Qt or Qnil. */
5409 write_queue_push (struct Lisp_Process
*p
, Lisp_Object input_obj
,
5410 const char *buf
, ptrdiff_t len
, int front
)
5413 Lisp_Object entry
, obj
;
5415 if (STRINGP (input_obj
))
5417 offset
= buf
- SSDATA (input_obj
);
5423 obj
= make_unibyte_string (buf
, len
);
5426 entry
= Fcons (obj
, Fcons (make_number (offset
), make_number (len
)));
5429 pset_write_queue (p
, Fcons (entry
, p
->write_queue
));
5431 pset_write_queue (p
, nconc2 (p
->write_queue
, Fcons (entry
, Qnil
)));
5434 /* Remove the first element in the write_queue of process P, put its
5435 contents in OBJ, BUF and LEN, and return non-zero. If the
5436 write_queue is empty, return zero. */
5439 write_queue_pop (struct Lisp_Process
*p
, Lisp_Object
*obj
,
5440 const char **buf
, ptrdiff_t *len
)
5442 Lisp_Object entry
, offset_length
;
5445 if (NILP (p
->write_queue
))
5448 entry
= XCAR (p
->write_queue
);
5449 pset_write_queue (p
, XCDR (p
->write_queue
));
5451 *obj
= XCAR (entry
);
5452 offset_length
= XCDR (entry
);
5454 *len
= XINT (XCDR (offset_length
));
5455 offset
= XINT (XCAR (offset_length
));
5456 *buf
= SSDATA (*obj
) + offset
;
5461 /* Send some data to process PROC.
5462 BUF is the beginning of the data; LEN is the number of characters.
5463 OBJECT is the Lisp object that the data comes from. If OBJECT is
5464 nil or t, it means that the data comes from C string.
5466 If OBJECT is not nil, the data is encoded by PROC's coding-system
5467 for encoding before it is sent.
5469 This function can evaluate Lisp code and can garbage collect. */
5472 send_process (Lisp_Object proc
, const char *buf
, ptrdiff_t len
,
5475 struct Lisp_Process
*p
= XPROCESS (proc
);
5477 struct coding_system
*coding
;
5479 if (p
->raw_status_new
)
5481 if (! EQ (p
->status
, Qrun
))
5482 error ("Process %s not running", SDATA (p
->name
));
5484 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5486 coding
= proc_encode_coding_system
[p
->outfd
];
5487 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5489 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5490 || (BUFFERP (object
)
5491 && !NILP (BVAR (XBUFFER (object
), enable_multibyte_characters
)))
5494 pset_encode_coding_system
5495 (p
, complement_process_encoding_system (p
->encode_coding_system
));
5496 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
5498 /* The coding system for encoding was changed to raw-text
5499 because we sent a unibyte text previously. Now we are
5500 sending a multibyte text, thus we must encode it by the
5501 original coding system specified for the current process.
5503 Another reason we come here is that the coding system
5504 was just complemented and a new one was returned by
5505 complement_process_encoding_system. */
5506 setup_coding_system (p
->encode_coding_system
, coding
);
5507 Vlast_coding_system_used
= p
->encode_coding_system
;
5509 coding
->src_multibyte
= 1;
5513 coding
->src_multibyte
= 0;
5514 /* For sending a unibyte text, character code conversion should
5515 not take place but EOL conversion should. So, setup raw-text
5516 or one of the subsidiary if we have not yet done it. */
5517 if (CODING_REQUIRE_ENCODING (coding
))
5519 if (CODING_REQUIRE_FLUSHING (coding
))
5521 /* But, before changing the coding, we must flush out data. */
5522 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5523 send_process (proc
, "", 0, Qt
);
5524 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
5526 setup_coding_system (raw_text_coding_system
5527 (Vlast_coding_system_used
),
5529 coding
->src_multibyte
= 0;
5532 coding
->dst_multibyte
= 0;
5534 if (CODING_REQUIRE_ENCODING (coding
))
5536 coding
->dst_object
= Qt
;
5537 if (BUFFERP (object
))
5539 ptrdiff_t from_byte
, from
, to
;
5540 ptrdiff_t save_pt
, save_pt_byte
;
5541 struct buffer
*cur
= current_buffer
;
5543 set_buffer_internal (XBUFFER (object
));
5544 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
5546 from_byte
= PTR_BYTE_POS ((unsigned char *) buf
);
5547 from
= BYTE_TO_CHAR (from_byte
);
5548 to
= BYTE_TO_CHAR (from_byte
+ len
);
5549 TEMP_SET_PT_BOTH (from
, from_byte
);
5550 encode_coding_object (coding
, object
, from
, from_byte
,
5551 to
, from_byte
+ len
, Qt
);
5552 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
5553 set_buffer_internal (cur
);
5555 else if (STRINGP (object
))
5557 encode_coding_object (coding
, object
, 0, 0, SCHARS (object
),
5558 SBYTES (object
), Qt
);
5562 coding
->dst_object
= make_unibyte_string (buf
, len
);
5563 coding
->produced
= len
;
5566 len
= coding
->produced
;
5567 object
= coding
->dst_object
;
5568 buf
= SSDATA (object
);
5571 if (pty_max_bytes
== 0)
5573 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5574 pty_max_bytes
= fpathconf (p
->outfd
, _PC_MAX_CANON
);
5575 if (pty_max_bytes
< 0)
5576 pty_max_bytes
= 250;
5578 pty_max_bytes
= 250;
5580 /* Deduct one, to leave space for the eof. */
5584 /* If there is already data in the write_queue, put the new data
5585 in the back of queue. Otherwise, ignore it. */
5586 if (!NILP (p
->write_queue
))
5587 write_queue_push (p
, object
, buf
, len
, 0);
5589 do /* while !NILP (p->write_queue) */
5591 ptrdiff_t cur_len
= -1;
5592 const char *cur_buf
;
5593 Lisp_Object cur_object
;
5595 /* If write_queue is empty, ignore it. */
5596 if (!write_queue_pop (p
, &cur_object
, &cur_buf
, &cur_len
))
5600 cur_object
= object
;
5605 /* Send this batch, using one or more write calls. */
5606 ptrdiff_t written
= 0;
5607 int outfd
= p
->outfd
;
5608 #ifdef DATAGRAM_SOCKETS
5609 if (DATAGRAM_CHAN_P (outfd
))
5611 rv
= sendto (outfd
, cur_buf
, cur_len
,
5612 0, datagram_address
[outfd
].sa
,
5613 datagram_address
[outfd
].len
);
5616 else if (errno
== EMSGSIZE
)
5617 report_file_error ("sending datagram", Fcons (proc
, Qnil
));
5624 written
= emacs_gnutls_write (p
, cur_buf
, cur_len
);
5627 written
= emacs_write (outfd
, cur_buf
, cur_len
);
5628 rv
= (written
? 0 : -1);
5629 #ifdef ADAPTIVE_READ_BUFFERING
5630 if (p
->read_output_delay
> 0
5631 && p
->adaptive_read_buffering
== 1)
5633 p
->read_output_delay
= 0;
5634 process_output_delay_count
--;
5635 p
->read_output_skip
= 0;
5644 || errno
== EWOULDBLOCK
5650 /* Buffer is full. Wait, accepting input;
5651 that may allow the program
5652 to finish doing output and read more. */
5654 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5655 /* A gross hack to work around a bug in FreeBSD.
5656 In the following sequence, read(2) returns
5660 write(2) 954 bytes, get EAGAIN
5661 read(2) 1024 bytes in process_read_output
5662 read(2) 11 bytes in process_read_output
5664 That is, read(2) returns more bytes than have
5665 ever been written successfully. The 1033 bytes
5666 read are the 1022 bytes written successfully
5667 after processing (for example with CRs added if
5668 the terminal is set up that way which it is
5669 here). The same bytes will be seen again in a
5670 later read(2), without the CRs. */
5672 if (errno
== EAGAIN
)
5675 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5677 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5679 /* Put what we should have written in wait_queue. */
5680 write_queue_push (p
, cur_object
, cur_buf
, cur_len
, 1);
5681 wait_reading_process_output (0, 20 * 1000 * 1000,
5682 0, 0, Qnil
, NULL
, 0);
5683 /* Reread queue, to see what is left. */
5686 else if (errno
== EPIPE
)
5688 p
->raw_status_new
= 0;
5689 pset_status (p
, list2 (Qexit
, make_number (256)));
5690 p
->tick
= ++process_tick
;
5691 deactivate_process (proc
);
5692 error ("process %s no longer connected to pipe; closed it",
5696 /* This is a real error. */
5697 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5703 while (!NILP (p
->write_queue
));
5706 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5708 doc
: /* Send current contents of region as input to PROCESS.
5709 PROCESS may be a process, a buffer, the name of a process or buffer, or
5710 nil, indicating the current buffer's process.
5711 Called from program, takes three arguments, PROCESS, START and END.
5712 If the region is more than 500 characters long,
5713 it is sent in several bunches. This may happen even for shorter regions.
5714 Output from processes can arrive in between bunches. */)
5715 (Lisp_Object process
, Lisp_Object start
, Lisp_Object end
)
5718 ptrdiff_t start1
, end1
;
5720 proc
= get_process (process
);
5721 validate_region (&start
, &end
);
5723 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5724 move_gap (XINT (start
));
5726 start1
= CHAR_TO_BYTE (XINT (start
));
5727 end1
= CHAR_TO_BYTE (XINT (end
));
5728 send_process (proc
, (char *) BYTE_POS_ADDR (start1
), end1
- start1
,
5729 Fcurrent_buffer ());
5734 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5736 doc
: /* Send PROCESS the contents of STRING as input.
5737 PROCESS may be a process, a buffer, the name of a process or buffer, or
5738 nil, indicating the current buffer's process.
5739 If STRING is more than 500 characters long,
5740 it is sent in several bunches. This may happen even for shorter strings.
5741 Output from processes can arrive in between bunches. */)
5742 (Lisp_Object process
, Lisp_Object string
)
5745 CHECK_STRING (string
);
5746 proc
= get_process (process
);
5747 send_process (proc
, SSDATA (string
),
5748 SBYTES (string
), string
);
5752 /* Return the foreground process group for the tty/pty that
5753 the process P uses. */
5755 emacs_get_tty_pgrp (struct Lisp_Process
*p
)
5760 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5763 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5764 master side. Try the slave side. */
5765 fd
= emacs_open (SSDATA (p
->tty_name
), O_RDONLY
, 0);
5769 ioctl (fd
, TIOCGPGRP
, &gid
);
5773 #endif /* defined (TIOCGPGRP ) */
5778 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5779 Sprocess_running_child_p
, 0, 1, 0,
5780 doc
: /* Return t if PROCESS has given the terminal to a child.
5781 If the operating system does not make it possible to find out,
5782 return t unconditionally. */)
5783 (Lisp_Object process
)
5785 /* Initialize in case ioctl doesn't exist or gives an error,
5786 in a way that will cause returning t. */
5789 struct Lisp_Process
*p
;
5791 proc
= get_process (process
);
5792 p
= XPROCESS (proc
);
5794 if (!EQ (p
->type
, Qreal
))
5795 error ("Process %s is not a subprocess",
5798 error ("Process %s is not active",
5801 gid
= emacs_get_tty_pgrp (p
);
5808 /* send a signal number SIGNO to PROCESS.
5809 If CURRENT_GROUP is t, that means send to the process group
5810 that currently owns the terminal being used to communicate with PROCESS.
5811 This is used for various commands in shell mode.
5812 If CURRENT_GROUP is lambda, that means send to the process group
5813 that currently owns the terminal, but only if it is NOT the shell itself.
5815 If NOMSG is zero, insert signal-announcements into process's buffers
5818 If we can, we try to signal PROCESS by sending control characters
5819 down the pty. This allows us to signal inferiors who have changed
5820 their uid, for which killpg would return an EPERM error. */
5823 process_send_signal (Lisp_Object process
, int signo
, Lisp_Object current_group
,
5827 register struct Lisp_Process
*p
;
5831 proc
= get_process (process
);
5832 p
= XPROCESS (proc
);
5834 if (!EQ (p
->type
, Qreal
))
5835 error ("Process %s is not a subprocess",
5838 error ("Process %s is not active",
5842 current_group
= Qnil
;
5844 /* If we are using pgrps, get a pgrp number and make it negative. */
5845 if (NILP (current_group
))
5846 /* Send the signal to the shell's process group. */
5850 #ifdef SIGNALS_VIA_CHARACTERS
5851 /* If possible, send signals to the entire pgrp
5852 by sending an input character to it. */
5855 cc_t
*sig_char
= NULL
;
5857 tcgetattr (p
->infd
, &t
);
5862 sig_char
= &t
.c_cc
[VINTR
];
5866 sig_char
= &t
.c_cc
[VQUIT
];
5870 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5871 sig_char
= &t
.c_cc
[VSWTCH
];
5873 sig_char
= &t
.c_cc
[VSUSP
];
5878 if (sig_char
&& *sig_char
!= CDISABLE
)
5880 send_process (proc
, (char *) sig_char
, 1, Qnil
);
5883 /* If we can't send the signal with a character,
5884 fall through and send it another way. */
5886 /* The code above may fall through if it can't
5887 handle the signal. */
5888 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5891 /* Get the current pgrp using the tty itself, if we have that.
5892 Otherwise, use the pty to get the pgrp.
5893 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5894 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5895 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5896 His patch indicates that if TIOCGPGRP returns an error, then
5897 we should just assume that p->pid is also the process group id. */
5899 gid
= emacs_get_tty_pgrp (p
);
5902 /* If we can't get the information, assume
5903 the shell owns the tty. */
5906 /* It is not clear whether anything really can set GID to -1.
5907 Perhaps on some system one of those ioctls can or could do so.
5908 Or perhaps this is vestigial. */
5911 #else /* ! defined (TIOCGPGRP ) */
5912 /* Can't select pgrps on this system, so we know that
5913 the child itself heads the pgrp. */
5915 #endif /* ! defined (TIOCGPGRP ) */
5917 /* If current_group is lambda, and the shell owns the terminal,
5918 don't send any signal. */
5919 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
5927 p
->raw_status_new
= 0;
5928 pset_status (p
, Qrun
);
5929 p
->tick
= ++process_tick
;
5932 status_notify (NULL
);
5933 redisplay_preserve_echo_area (13);
5936 #endif /* ! defined (SIGCONT) */
5940 flush_pending_output (p
->infd
);
5944 /* If we don't have process groups, send the signal to the immediate
5945 subprocess. That isn't really right, but it's better than any
5946 obvious alternative. */
5949 kill (p
->pid
, signo
);
5953 /* gid may be a pid, or minus a pgrp's number */
5955 if (!NILP (current_group
))
5957 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
5958 EMACS_KILLPG (gid
, signo
);
5965 #else /* ! defined (TIOCSIGSEND) */
5966 EMACS_KILLPG (gid
, signo
);
5967 #endif /* ! defined (TIOCSIGSEND) */
5970 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
5971 doc
: /* Interrupt process PROCESS.
5972 PROCESS may be a process, a buffer, or the name of a process or buffer.
5973 No arg or nil means current buffer's process.
5974 Second arg CURRENT-GROUP non-nil means send signal to
5975 the current process-group of the process's controlling terminal
5976 rather than to the process's own process group.
5977 If the process is a shell, this means interrupt current subjob
5978 rather than the shell.
5980 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
5981 don't send the signal. */)
5982 (Lisp_Object process
, Lisp_Object current_group
)
5984 process_send_signal (process
, SIGINT
, current_group
, 0);
5988 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
5989 doc
: /* Kill process PROCESS. May be process or name of one.
5990 See function `interrupt-process' for more details on usage. */)
5991 (Lisp_Object process
, Lisp_Object current_group
)
5993 process_send_signal (process
, SIGKILL
, current_group
, 0);
5997 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
5998 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
5999 See function `interrupt-process' for more details on usage. */)
6000 (Lisp_Object process
, Lisp_Object current_group
)
6002 process_send_signal (process
, SIGQUIT
, current_group
, 0);
6006 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
6007 doc
: /* Stop process PROCESS. May be process or name of one.
6008 See function `interrupt-process' for more details on usage.
6009 If PROCESS is a network or serial process, inhibit handling of incoming
6011 (Lisp_Object process
, Lisp_Object current_group
)
6013 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6015 struct Lisp_Process
*p
;
6017 p
= XPROCESS (process
);
6018 if (NILP (p
->command
)
6021 FD_CLR (p
->infd
, &input_wait_mask
);
6022 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6024 pset_command (p
, Qt
);
6028 error ("No SIGTSTP support");
6030 process_send_signal (process
, SIGTSTP
, current_group
, 0);
6035 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
6036 doc
: /* Continue process PROCESS. May be process or name of one.
6037 See function `interrupt-process' for more details on usage.
6038 If PROCESS is a network or serial process, resume handling of incoming
6040 (Lisp_Object process
, Lisp_Object current_group
)
6042 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6044 struct Lisp_Process
*p
;
6046 p
= XPROCESS (process
);
6047 if (EQ (p
->command
, Qt
)
6049 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
6051 FD_SET (p
->infd
, &input_wait_mask
);
6052 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
6054 if (fd_info
[ p
->infd
].flags
& FILE_SERIAL
)
6055 PurgeComm (fd_info
[ p
->infd
].hnd
, PURGE_RXABORT
| PURGE_RXCLEAR
);
6056 #else /* not WINDOWSNT */
6057 tcflush (p
->infd
, TCIFLUSH
);
6058 #endif /* not WINDOWSNT */
6060 pset_command (p
, Qnil
);
6064 process_send_signal (process
, SIGCONT
, current_group
, 0);
6066 error ("No SIGCONT support");
6071 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
6072 2, 2, "sProcess (name or number): \nnSignal code: ",
6073 doc
: /* Send PROCESS the signal with code SIGCODE.
6074 PROCESS may also be a number specifying the process id of the
6075 process to signal; in this case, the process need not be a child of
6077 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
6078 (Lisp_Object process
, Lisp_Object sigcode
)
6082 if (STRINGP (process
))
6084 Lisp_Object tem
= Fget_process (process
);
6087 Lisp_Object process_number
=
6088 string_to_number (SSDATA (process
), 10, 1);
6089 if (INTEGERP (process_number
) || FLOATP (process_number
))
6090 tem
= process_number
;
6094 else if (!NUMBERP (process
))
6095 process
= get_process (process
);
6100 if (NUMBERP (process
))
6101 CONS_TO_INTEGER (process
, pid_t
, pid
);
6104 CHECK_PROCESS (process
);
6105 pid
= XPROCESS (process
)->pid
;
6107 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6110 #define parse_signal(NAME, VALUE) \
6111 else if (!xstrcasecmp (name, NAME)) \
6112 XSETINT (sigcode, VALUE)
6114 if (INTEGERP (sigcode
))
6115 CHECK_TYPE_RANGED_INTEGER (int, sigcode
);
6120 CHECK_SYMBOL (sigcode
);
6121 name
= SSDATA (SYMBOL_NAME (sigcode
));
6123 if (!strncmp (name
, "SIG", 3) || !strncmp (name
, "sig", 3))
6129 parse_signal ("usr1", SIGUSR1
);
6132 parse_signal ("usr2", SIGUSR2
);
6134 parse_signal ("term", SIGTERM
);
6136 parse_signal ("hup", SIGHUP
);
6138 parse_signal ("int", SIGINT
);
6140 parse_signal ("quit", SIGQUIT
);
6142 parse_signal ("ill", SIGILL
);
6143 parse_signal ("abrt", SIGABRT
);
6145 parse_signal ("emt", SIGEMT
);
6148 parse_signal ("kill", SIGKILL
);
6150 parse_signal ("fpe", SIGFPE
);
6152 parse_signal ("bus", SIGBUS
);
6154 parse_signal ("segv", SIGSEGV
);
6156 parse_signal ("sys", SIGSYS
);
6159 parse_signal ("pipe", SIGPIPE
);
6162 parse_signal ("alrm", SIGALRM
);
6165 parse_signal ("urg", SIGURG
);
6168 parse_signal ("stop", SIGSTOP
);
6171 parse_signal ("tstp", SIGTSTP
);
6174 parse_signal ("cont", SIGCONT
);
6177 parse_signal ("chld", SIGCHLD
);
6180 parse_signal ("ttin", SIGTTIN
);
6183 parse_signal ("ttou", SIGTTOU
);
6186 parse_signal ("io", SIGIO
);
6189 parse_signal ("xcpu", SIGXCPU
);
6192 parse_signal ("xfsz", SIGXFSZ
);
6195 parse_signal ("vtalrm", SIGVTALRM
);
6198 parse_signal ("prof", SIGPROF
);
6201 parse_signal ("winch", SIGWINCH
);
6204 parse_signal ("info", SIGINFO
);
6207 error ("Undefined signal name %s", name
);
6212 return make_number (kill (pid
, XINT (sigcode
)));
6215 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6216 doc
: /* Make PROCESS see end-of-file in its input.
6217 EOF comes after any text already sent to it.
6218 PROCESS may be a process, a buffer, the name of a process or buffer, or
6219 nil, indicating the current buffer's process.
6220 If PROCESS is a network connection, or is a process communicating
6221 through a pipe (as opposed to a pty), then you cannot send any more
6222 text to PROCESS after you call this function.
6223 If PROCESS is a serial process, wait until all output written to the
6224 process has been transmitted to the serial port. */)
6225 (Lisp_Object process
)
6228 struct coding_system
*coding
;
6230 if (DATAGRAM_CONN_P (process
))
6233 proc
= get_process (process
);
6234 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6236 /* Make sure the process is really alive. */
6237 if (XPROCESS (proc
)->raw_status_new
)
6238 update_status (XPROCESS (proc
));
6239 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6240 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6242 if (CODING_REQUIRE_FLUSHING (coding
))
6244 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6245 send_process (proc
, "", 0, Qnil
);
6248 if (XPROCESS (proc
)->pty_flag
)
6249 send_process (proc
, "\004", 1, Qnil
);
6250 else if (EQ (XPROCESS (proc
)->type
, Qserial
))
6253 if (tcdrain (XPROCESS (proc
)->outfd
) != 0)
6254 error ("tcdrain() failed: %s", emacs_strerror (errno
));
6255 #endif /* not WINDOWSNT */
6256 /* Do nothing on Windows because writes are blocking. */
6260 int old_outfd
, new_outfd
;
6262 #ifdef HAVE_SHUTDOWN
6263 /* If this is a network connection, or socketpair is used
6264 for communication with the subprocess, call shutdown to cause EOF.
6265 (In some old system, shutdown to socketpair doesn't work.
6266 Then we just can't win.) */
6267 if (EQ (XPROCESS (proc
)->type
, Qnetwork
)
6268 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6269 shutdown (XPROCESS (proc
)->outfd
, 1);
6270 /* In case of socketpair, outfd == infd, so don't close it. */
6271 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6272 emacs_close (XPROCESS (proc
)->outfd
);
6273 #else /* not HAVE_SHUTDOWN */
6274 emacs_close (XPROCESS (proc
)->outfd
);
6275 #endif /* not HAVE_SHUTDOWN */
6276 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6279 old_outfd
= XPROCESS (proc
)->outfd
;
6281 if (!proc_encode_coding_system
[new_outfd
])
6282 proc_encode_coding_system
[new_outfd
]
6283 = xmalloc (sizeof (struct coding_system
));
6284 *proc_encode_coding_system
[new_outfd
]
6285 = *proc_encode_coding_system
[old_outfd
];
6286 memset (proc_encode_coding_system
[old_outfd
], 0,
6287 sizeof (struct coding_system
));
6289 XPROCESS (proc
)->outfd
= new_outfd
;
6294 /* On receipt of a signal that a child status has changed, loop asking
6295 about children with changed statuses until the system says there
6298 All we do is change the status; we do not run sentinels or print
6299 notifications. That is saved for the next time keyboard input is
6300 done, in order to avoid timing errors.
6302 ** WARNING: this can be called during garbage collection.
6303 Therefore, it must not be fooled by the presence of mark bits in
6306 ** USG WARNING: Although it is not obvious from the documentation
6307 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6308 signal() before executing at least one wait(), otherwise the
6309 handler will be called again, resulting in an infinite loop. The
6310 relevant portion of the documentation reads "SIGCLD signals will be
6311 queued and the signal-catching function will be continually
6312 reentered until the queue is empty". Invoking signal() causes the
6313 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6316 ** Malloc WARNING: This should never call malloc either directly or
6317 indirectly; if it does, that is a bug */
6319 /* Record the changed status of the child process PID with wait status W. */
6321 record_child_status_change (pid_t pid
, int w
)
6325 struct Lisp_Process
*p
;
6328 /* Find the process that signaled us, and record its status. */
6330 /* The process can have been deleted by Fdelete_process. */
6331 for (tail
= deleted_pid_list
; CONSP (tail
); tail
= XCDR (tail
))
6333 Lisp_Object xpid
= XCAR (tail
);
6334 if ((INTEGERP (xpid
) && pid
== XINT (xpid
))
6335 || (FLOATP (xpid
) && pid
== XFLOAT_DATA (xpid
)))
6337 XSETCAR (tail
, Qnil
);
6342 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6344 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6346 proc
= XCDR (XCAR (tail
));
6347 p
= XPROCESS (proc
);
6348 if (EQ (p
->type
, Qreal
) && p
->pid
== pid
)
6353 /* Look for an asynchronous process whose pid hasn't been filled
6356 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6358 proc
= XCDR (XCAR (tail
));
6359 p
= XPROCESS (proc
);
6365 /* Change the status of the process that was found. */
6368 int clear_desc_flag
= 0;
6370 p
->tick
= ++process_tick
;
6372 p
->raw_status_new
= 1;
6374 /* If process has terminated, stop waiting for its output. */
6375 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6377 clear_desc_flag
= 1;
6379 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6380 if (clear_desc_flag
)
6382 FD_CLR (p
->infd
, &input_wait_mask
);
6383 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6386 /* Tell wait_reading_process_output that it needs to wake up and
6388 if (input_available_clear_time
)
6389 *input_available_clear_time
= make_emacs_time (0, 0);
6391 /* There was no asynchronous process found for that pid: we have
6392 a synchronous process. */
6395 synch_process_alive
= 0;
6397 /* Report the status of the synchronous process. */
6399 synch_process_retcode
= WEXITSTATUS (w
);
6400 else if (WIFSIGNALED (w
))
6401 synch_process_termsig
= WTERMSIG (w
);
6403 /* Tell wait_reading_process_output that it needs to wake up and
6405 if (input_available_clear_time
)
6406 *input_available_clear_time
= make_emacs_time (0, 0);
6413 /* On some systems, the SIGCHLD handler must return right away. If
6414 any more processes want to signal us, we will get another signal.
6415 Otherwise, loop around to use up all the processes that have
6416 something to tell us. */
6417 #if (defined WINDOWSNT \
6418 || (defined USG && !defined GNU_LINUX \
6419 && !(defined HPUX && defined WNOHANG)))
6420 enum { CAN_HANDLE_MULTIPLE_CHILDREN
= 0 };
6422 enum { CAN_HANDLE_MULTIPLE_CHILDREN
= 1 };
6426 handle_child_signal (int sig
)
6434 pid
= waitpid (-1, &status
, WNOHANG
| WUNTRACED
);
6435 while (pid
< 0 && errno
== EINTR
);
6437 /* PID == 0 means no processes found, PID == -1 means a real failure.
6438 Either way, we have done all our job. */
6442 record_child_status_change (pid
, status
);
6444 while (CAN_HANDLE_MULTIPLE_CHILDREN
);
6448 deliver_child_signal (int sig
)
6450 deliver_process_signal (sig
, handle_child_signal
);
6453 #endif /* SIGCHLD */
6457 exec_sentinel_unwind (Lisp_Object data
)
6459 pset_sentinel (XPROCESS (XCAR (data
)), XCDR (data
));
6464 exec_sentinel_error_handler (Lisp_Object error_val
)
6466 cmd_error_internal (error_val
, "error in process sentinel: ");
6468 update_echo_area ();
6469 Fsleep_for (make_number (2), Qnil
);
6474 exec_sentinel (Lisp_Object proc
, Lisp_Object reason
)
6476 Lisp_Object sentinel
, odeactivate
;
6477 struct Lisp_Process
*p
= XPROCESS (proc
);
6478 ptrdiff_t count
= SPECPDL_INDEX ();
6479 bool outer_running_asynch_code
= running_asynch_code
;
6480 int waiting
= waiting_for_user_input_p
;
6482 if (inhibit_sentinels
)
6485 /* No need to gcpro these, because all we do with them later
6486 is test them for EQness, and none of them should be a string. */
6487 odeactivate
= Vdeactivate_mark
;
6489 Lisp_Object obuffer
, okeymap
;
6490 XSETBUFFER (obuffer
, current_buffer
);
6491 okeymap
= BVAR (current_buffer
, keymap
);
6494 /* There's no good reason to let sentinels change the current
6495 buffer, and many callers of accept-process-output, sit-for, and
6496 friends don't expect current-buffer to be changed from under them. */
6497 record_unwind_current_buffer ();
6499 sentinel
= p
->sentinel
;
6500 if (NILP (sentinel
))
6503 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6504 assure that it gets restored no matter how the sentinel exits. */
6505 pset_sentinel (p
, Qnil
);
6506 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6507 /* Inhibit quit so that random quits don't screw up a running filter. */
6508 specbind (Qinhibit_quit
, Qt
);
6509 specbind (Qlast_nonmenu_event
, Qt
); /* Why? --Stef */
6511 /* In case we get recursively called,
6512 and we already saved the match data nonrecursively,
6513 save the same match data in safely recursive fashion. */
6514 if (outer_running_asynch_code
)
6517 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6518 restore_search_regs ();
6519 record_unwind_save_match_data ();
6520 Fset_match_data (tem
, Qt
);
6523 /* For speed, if a search happens within this code,
6524 save the match data in a special nonrecursive fashion. */
6525 running_asynch_code
= 1;
6527 internal_condition_case_1 (read_process_output_call
,
6529 Fcons (proc
, Fcons (reason
, Qnil
))),
6530 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6531 exec_sentinel_error_handler
);
6533 /* If we saved the match data nonrecursively, restore it now. */
6534 restore_search_regs ();
6535 running_asynch_code
= outer_running_asynch_code
;
6537 Vdeactivate_mark
= odeactivate
;
6539 /* Restore waiting_for_user_input_p as it was
6540 when we were called, in case the filter clobbered it. */
6541 waiting_for_user_input_p
= waiting
;
6544 if (! EQ (Fcurrent_buffer (), obuffer
)
6545 || ! EQ (current_buffer
->keymap
, okeymap
))
6547 /* But do it only if the caller is actually going to read events.
6548 Otherwise there's no need to make him wake up, and it could
6549 cause trouble (for example it would make sit_for return). */
6550 if (waiting_for_user_input_p
== -1)
6551 record_asynch_buffer_change ();
6553 unbind_to (count
, Qnil
);
6556 /* Report all recent events of a change in process status
6557 (either run the sentinel or output a message).
6558 This is usually done while Emacs is waiting for keyboard input
6559 but can be done at other times. */
6562 status_notify (struct Lisp_Process
*deleting_process
)
6564 register Lisp_Object proc
, buffer
;
6565 Lisp_Object tail
, msg
;
6566 struct gcpro gcpro1
, gcpro2
;
6570 /* We need to gcpro tail; if read_process_output calls a filter
6571 which deletes a process and removes the cons to which tail points
6572 from Vprocess_alist, and then causes a GC, tail is an unprotected
6576 /* Set this now, so that if new processes are created by sentinels
6577 that we run, we get called again to handle their status changes. */
6578 update_tick
= process_tick
;
6580 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6583 register struct Lisp_Process
*p
;
6585 proc
= Fcdr (XCAR (tail
));
6586 p
= XPROCESS (proc
);
6588 if (p
->tick
!= p
->update_tick
)
6590 p
->update_tick
= p
->tick
;
6592 /* If process is still active, read any output that remains. */
6593 while (! EQ (p
->filter
, Qt
)
6594 && ! EQ (p
->status
, Qconnect
)
6595 && ! EQ (p
->status
, Qlisten
)
6596 /* Network or serial process not stopped: */
6597 && ! EQ (p
->command
, Qt
)
6599 && p
!= deleting_process
6600 && read_process_output (proc
, p
->infd
) > 0);
6604 /* Get the text to use for the message. */
6605 if (p
->raw_status_new
)
6607 msg
= status_message (p
);
6609 /* If process is terminated, deactivate it or delete it. */
6611 if (CONSP (p
->status
))
6612 symbol
= XCAR (p
->status
);
6614 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6615 || EQ (symbol
, Qclosed
))
6617 if (delete_exited_processes
)
6618 remove_process (proc
);
6620 deactivate_process (proc
);
6623 /* The actions above may have further incremented p->tick.
6624 So set p->update_tick again
6625 so that an error in the sentinel will not cause
6626 this code to be run again. */
6627 p
->update_tick
= p
->tick
;
6628 /* Now output the message suitably. */
6629 if (!NILP (p
->sentinel
))
6630 exec_sentinel (proc
, msg
);
6631 /* Don't bother with a message in the buffer
6632 when a process becomes runnable. */
6633 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6636 struct buffer
*old
= current_buffer
;
6637 ptrdiff_t opoint
, opoint_byte
;
6638 ptrdiff_t before
, before_byte
;
6640 /* Avoid error if buffer is deleted
6641 (probably that's why the process is dead, too) */
6642 if (!BUFFER_LIVE_P (XBUFFER (buffer
)))
6644 Fset_buffer (buffer
);
6647 opoint_byte
= PT_BYTE
;
6648 /* Insert new output into buffer
6649 at the current end-of-output marker,
6650 thus preserving logical ordering of input and output. */
6651 if (XMARKER (p
->mark
)->buffer
)
6652 Fgoto_char (p
->mark
);
6654 SET_PT_BOTH (ZV
, ZV_BYTE
);
6657 before_byte
= PT_BYTE
;
6659 tem
= BVAR (current_buffer
, read_only
);
6660 bset_read_only (current_buffer
, Qnil
);
6661 insert_string ("\nProcess ");
6662 { /* FIXME: temporary kludge */
6663 Lisp_Object tem2
= p
->name
; Finsert (1, &tem2
); }
6664 insert_string (" ");
6666 bset_read_only (current_buffer
, tem
);
6667 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6669 if (opoint
>= before
)
6670 SET_PT_BOTH (opoint
+ (PT
- before
),
6671 opoint_byte
+ (PT_BYTE
- before_byte
));
6673 SET_PT_BOTH (opoint
, opoint_byte
);
6675 set_buffer_internal (old
);
6680 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6685 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6686 Sset_process_coding_system
, 1, 3, 0,
6687 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6688 DECODING will be used to decode subprocess output and ENCODING to
6689 encode subprocess input. */)
6690 (register Lisp_Object process
, Lisp_Object decoding
, Lisp_Object encoding
)
6692 register struct Lisp_Process
*p
;
6694 CHECK_PROCESS (process
);
6695 p
= XPROCESS (process
);
6697 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6699 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6700 Fcheck_coding_system (decoding
);
6701 Fcheck_coding_system (encoding
);
6702 encoding
= coding_inherit_eol_type (encoding
, Qnil
);
6703 pset_decode_coding_system (p
, decoding
);
6704 pset_encode_coding_system (p
, encoding
);
6705 setup_process_coding_systems (process
);
6710 DEFUN ("process-coding-system",
6711 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6712 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6713 (register Lisp_Object process
)
6715 CHECK_PROCESS (process
);
6716 return Fcons (XPROCESS (process
)->decode_coding_system
,
6717 XPROCESS (process
)->encode_coding_system
);
6720 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6721 Sset_process_filter_multibyte
, 2, 2, 0,
6722 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6723 If FLAG is non-nil, the filter is given multibyte strings.
6724 If FLAG is nil, the filter is given unibyte strings. In this case,
6725 all character code conversion except for end-of-line conversion is
6727 (Lisp_Object process
, Lisp_Object flag
)
6729 register struct Lisp_Process
*p
;
6731 CHECK_PROCESS (process
);
6732 p
= XPROCESS (process
);
6734 pset_decode_coding_system
6735 (p
, raw_text_coding_system (p
->decode_coding_system
));
6736 setup_process_coding_systems (process
);
6741 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6742 Sprocess_filter_multibyte_p
, 1, 1, 0,
6743 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6744 (Lisp_Object process
)
6746 register struct Lisp_Process
*p
;
6747 struct coding_system
*coding
;
6749 CHECK_PROCESS (process
);
6750 p
= XPROCESS (process
);
6751 coding
= proc_decode_coding_system
[p
->infd
];
6752 return (CODING_FOR_UNIBYTE (coding
) ? Qnil
: Qt
);
6761 add_gpm_wait_descriptor (int desc
)
6763 add_keyboard_wait_descriptor (desc
);
6767 delete_gpm_wait_descriptor (int desc
)
6769 delete_keyboard_wait_descriptor (desc
);
6774 # ifdef USABLE_SIGIO
6776 /* Return nonzero if *MASK has a bit set
6777 that corresponds to one of the keyboard input descriptors. */
6780 keyboard_bit_set (fd_set
*mask
)
6784 for (fd
= 0; fd
<= max_input_desc
; fd
++)
6785 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6786 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6793 #else /* not subprocesses */
6795 /* Defined on msdos.c. */
6796 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
6797 EMACS_TIME
*, void *);
6799 /* Implementation of wait_reading_process_output, assuming that there
6800 are no subprocesses. Used only by the MS-DOS build.
6802 Wait for timeout to elapse and/or keyboard input to be available.
6806 If negative, gobble data immediately available but don't wait for any.
6809 an additional duration to wait, measured in nanoseconds
6810 If TIME_LIMIT is zero, then:
6811 If NSECS == 0, there is no limit.
6812 If NSECS > 0, the timeout consists of NSECS only.
6813 If NSECS < 0, gobble data immediately, as if TIME_LIMIT were negative.
6816 0 to ignore keyboard input, or
6817 1 to return when input is available, or
6818 -1 means caller will actually read the input, so don't throw to
6821 see full version for other parameters. We know that wait_proc will
6822 always be NULL, since `subprocesses' isn't defined.
6824 DO_DISPLAY != 0 means redisplay should be done to show subprocess
6825 output that arrives.
6827 Return true if we received input from any process. */
6830 wait_reading_process_output (intmax_t time_limit
, int nsecs
, int read_kbd
,
6832 Lisp_Object wait_for_cell
,
6833 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
6836 EMACS_TIME end_time
, timeout
;
6843 else if (TYPE_MAXIMUM (time_t) < time_limit
)
6844 time_limit
= TYPE_MAXIMUM (time_t);
6846 /* What does time_limit really mean? */
6847 if (time_limit
|| 0 < nsecs
)
6849 timeout
= make_emacs_time (time_limit
, nsecs
);
6850 end_time
= add_emacs_time (current_emacs_time (), timeout
);
6853 /* Turn off periodic alarms (in case they are in use)
6854 and then turn off any other atimers,
6855 because the select emulator uses alarms. */
6857 turn_on_atimers (0);
6861 int timeout_reduced_for_timers
= 0;
6862 SELECT_TYPE waitchannels
;
6865 /* If calling from keyboard input, do not quit
6866 since we want to return C-g as an input character.
6867 Otherwise, do pending quit if requested. */
6871 /* Exit now if the cell we're waiting for became non-nil. */
6872 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6875 /* Compute time from now till when time limit is up */
6876 /* Exit if already run out */
6879 /* A negative timeout means
6880 gobble output available now
6881 but don't wait at all. */
6883 timeout
= make_emacs_time (0, 0);
6885 else if (time_limit
|| 0 < nsecs
)
6887 EMACS_TIME now
= current_emacs_time ();
6888 if (EMACS_TIME_LE (end_time
, now
))
6890 timeout
= sub_emacs_time (end_time
, now
);
6894 timeout
= make_emacs_time (100000, 0);
6897 /* If our caller will not immediately handle keyboard events,
6898 run timer events directly.
6899 (Callers that will immediately read keyboard events
6900 call timer_delay on their own.) */
6901 if (NILP (wait_for_cell
))
6903 EMACS_TIME timer_delay
;
6907 int old_timers_run
= timers_run
;
6908 timer_delay
= timer_check ();
6909 if (timers_run
!= old_timers_run
&& do_display
)
6910 /* We must retry, since a timer may have requeued itself
6911 and that could alter the time delay. */
6912 redisplay_preserve_echo_area (14);
6916 while (!detect_input_pending ());
6918 /* If there is unread keyboard input, also return. */
6920 && requeued_events_pending_p ())
6923 if (EMACS_TIME_VALID_P (timer_delay
) && 0 <= nsecs
)
6925 if (EMACS_TIME_LT (timer_delay
, timeout
))
6927 timeout
= timer_delay
;
6928 timeout_reduced_for_timers
= 1;
6933 /* Cause C-g and alarm signals to take immediate action,
6934 and cause input available signals to zero out timeout. */
6936 set_waiting_for_input (&timeout
);
6938 /* If a frame has been newly mapped and needs updating,
6939 reprocess its display stuff. */
6940 if (frame_garbaged
&& do_display
)
6942 clear_waiting_for_input ();
6943 redisplay_preserve_echo_area (15);
6945 set_waiting_for_input (&timeout
);
6948 /* Wait till there is something to do. */
6949 FD_ZERO (&waitchannels
);
6950 if (read_kbd
&& detect_input_pending ())
6954 if (read_kbd
|| !NILP (wait_for_cell
))
6955 FD_SET (0, &waitchannels
);
6956 nfds
= pselect (1, &waitchannels
, NULL
, NULL
, &timeout
, NULL
);
6961 /* Make C-g and alarm signals set flags again */
6962 clear_waiting_for_input ();
6964 /* If we woke up due to SIGWINCH, actually change size now. */
6965 do_pending_window_change (0);
6967 if ((time_limit
|| nsecs
) && nfds
== 0 && ! timeout_reduced_for_timers
)
6968 /* We waited the full specified time, so return now. */
6973 /* If the system call was interrupted, then go around the
6975 if (xerrno
== EINTR
)
6976 FD_ZERO (&waitchannels
);
6978 error ("select error: %s", emacs_strerror (xerrno
));
6981 /* Check for keyboard input */
6984 && detect_input_pending_run_timers (do_display
))
6986 swallow_events (do_display
);
6987 if (detect_input_pending_run_timers (do_display
))
6991 /* If there is unread keyboard input, also return. */
6993 && requeued_events_pending_p ())
6996 /* If wait_for_cell. check for keyboard input
6997 but don't run any timers.
6998 ??? (It seems wrong to me to check for keyboard
6999 input at all when wait_for_cell, but the code
7000 has been this way since July 1994.
7001 Try changing this after version 19.31.) */
7002 if (! NILP (wait_for_cell
)
7003 && detect_input_pending ())
7005 swallow_events (do_display
);
7006 if (detect_input_pending ())
7010 /* Exit now if the cell we're waiting for became non-nil. */
7011 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7020 #endif /* not subprocesses */
7022 /* The following functions are needed even if async subprocesses are
7023 not supported. Some of them are no-op stubs in that case. */
7025 /* Add DESC to the set of keyboard input descriptors. */
7028 add_keyboard_wait_descriptor (int desc
)
7030 #ifdef subprocesses /* actually means "not MSDOS" */
7031 FD_SET (desc
, &input_wait_mask
);
7032 FD_SET (desc
, &non_process_wait_mask
);
7033 if (desc
> max_input_desc
)
7034 max_input_desc
= desc
;
7038 /* From now on, do not expect DESC to give keyboard input. */
7041 delete_keyboard_wait_descriptor (int desc
)
7045 int lim
= max_input_desc
;
7047 FD_CLR (desc
, &input_wait_mask
);
7048 FD_CLR (desc
, &non_process_wait_mask
);
7050 if (desc
== max_input_desc
)
7051 for (fd
= 0; fd
< lim
; fd
++)
7052 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
7053 max_input_desc
= fd
;
7057 /* Setup coding systems of PROCESS. */
7060 setup_process_coding_systems (Lisp_Object process
)
7063 struct Lisp_Process
*p
= XPROCESS (process
);
7065 int outch
= p
->outfd
;
7066 Lisp_Object coding_system
;
7068 if (inch
< 0 || outch
< 0)
7071 if (!proc_decode_coding_system
[inch
])
7072 proc_decode_coding_system
[inch
] = xmalloc (sizeof (struct coding_system
));
7073 coding_system
= p
->decode_coding_system
;
7074 if (! NILP (p
->filter
))
7076 else if (BUFFERP (p
->buffer
))
7078 if (NILP (BVAR (XBUFFER (p
->buffer
), enable_multibyte_characters
)))
7079 coding_system
= raw_text_coding_system (coding_system
);
7081 setup_coding_system (coding_system
, proc_decode_coding_system
[inch
]);
7083 if (!proc_encode_coding_system
[outch
])
7084 proc_encode_coding_system
[outch
] = xmalloc (sizeof (struct coding_system
));
7085 setup_coding_system (p
->encode_coding_system
,
7086 proc_encode_coding_system
[outch
]);
7090 /* Close all descriptors currently in use for communication
7091 with subprocess. This is used in a newly-forked subprocess
7092 to get rid of irrelevant descriptors. */
7095 close_process_descs (void)
7099 for (i
= 0; i
< MAXDESC
; i
++)
7101 Lisp_Object process
;
7102 process
= chan_process
[i
];
7103 if (!NILP (process
))
7105 int in
= XPROCESS (process
)->infd
;
7106 int out
= XPROCESS (process
)->outfd
;
7109 if (out
>= 0 && in
!= out
)
7116 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7117 doc
: /* Return the (or a) process associated with BUFFER.
7118 BUFFER may be a buffer or the name of one. */)
7119 (register Lisp_Object buffer
)
7122 register Lisp_Object buf
, tail
, proc
;
7124 if (NILP (buffer
)) return Qnil
;
7125 buf
= Fget_buffer (buffer
);
7126 if (NILP (buf
)) return Qnil
;
7128 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7130 proc
= Fcdr (XCAR (tail
));
7131 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
7134 #endif /* subprocesses */
7138 DEFUN ("process-inherit-coding-system-flag",
7139 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7141 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
7142 If this flag is t, `buffer-file-coding-system' of the buffer
7143 associated with PROCESS will inherit the coding system used to decode
7144 the process output. */)
7145 (register Lisp_Object process
)
7148 CHECK_PROCESS (process
);
7149 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
7151 /* Ignore the argument and return the value of
7152 inherit-process-coding-system. */
7153 return inherit_process_coding_system
? Qt
: Qnil
;
7157 /* Kill all processes associated with `buffer'.
7158 If `buffer' is nil, kill all processes */
7161 kill_buffer_processes (Lisp_Object buffer
)
7164 Lisp_Object tail
, proc
;
7166 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7168 proc
= XCDR (XCAR (tail
));
7170 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
7172 if (NETCONN_P (proc
) || SERIALCONN_P (proc
))
7173 Fdelete_process (proc
);
7174 else if (XPROCESS (proc
)->infd
>= 0)
7175 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
7178 #else /* subprocesses */
7179 /* Since we have no subprocesses, this does nothing. */
7180 #endif /* subprocesses */
7183 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
,
7184 Swaiting_for_user_input_p
, 0, 0, 0,
7185 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
7186 This is intended for use by asynchronous process output filters and sentinels. */)
7190 return (waiting_for_user_input_p
? Qt
: Qnil
);
7196 /* Stop reading input from keyboard sources. */
7199 hold_keyboard_input (void)
7204 /* Resume reading input from keyboard sources. */
7207 unhold_keyboard_input (void)
7212 /* Return non-zero if keyboard input is on hold, zero otherwise. */
7215 kbd_on_hold_p (void)
7217 return kbd_is_on_hold
;
7221 /* Enumeration of and access to system processes a-la ps(1). */
7223 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
7225 doc
: /* Return a list of numerical process IDs of all running processes.
7226 If this functionality is unsupported, return nil.
7228 See `process-attributes' for getting attributes of a process given its ID. */)
7231 return list_system_processes ();
7234 DEFUN ("process-attributes", Fprocess_attributes
,
7235 Sprocess_attributes
, 1, 1, 0,
7236 doc
: /* Return attributes of the process given by its PID, a number.
7238 Value is an alist where each element is a cons cell of the form
7242 If this functionality is unsupported, the value is nil.
7244 See `list-system-processes' for getting a list of all process IDs.
7246 The KEYs of the attributes that this function may return are listed
7247 below, together with the type of the associated VALUE (in parentheses).
7248 Not all platforms support all of these attributes; unsupported
7249 attributes will not appear in the returned alist.
7250 Unless explicitly indicated otherwise, numbers can have either
7251 integer or floating point values.
7253 euid -- Effective user User ID of the process (number)
7254 user -- User name corresponding to euid (string)
7255 egid -- Effective user Group ID of the process (number)
7256 group -- Group name corresponding to egid (string)
7257 comm -- Command name (executable name only) (string)
7258 state -- Process state code, such as "S", "R", or "T" (string)
7259 ppid -- Parent process ID (number)
7260 pgrp -- Process group ID (number)
7261 sess -- Session ID, i.e. process ID of session leader (number)
7262 ttname -- Controlling tty name (string)
7263 tpgid -- ID of foreground process group on the process's tty (number)
7264 minflt -- number of minor page faults (number)
7265 majflt -- number of major page faults (number)
7266 cminflt -- cumulative number of minor page faults (number)
7267 cmajflt -- cumulative number of major page faults (number)
7268 utime -- user time used by the process, in (current-time) format,
7269 which is a list of integers (HIGH LOW USEC PSEC)
7270 stime -- system time used by the process (current-time)
7271 time -- sum of utime and stime (current-time)
7272 cutime -- user time used by the process and its children (current-time)
7273 cstime -- system time used by the process and its children (current-time)
7274 ctime -- sum of cutime and cstime (current-time)
7275 pri -- priority of the process (number)
7276 nice -- nice value of the process (number)
7277 thcount -- process thread count (number)
7278 start -- time the process started (current-time)
7279 vsize -- virtual memory size of the process in KB's (number)
7280 rss -- resident set size of the process in KB's (number)
7281 etime -- elapsed time the process is running, in (HIGH LOW USEC PSEC) format
7282 pcpu -- percents of CPU time used by the process (floating-point number)
7283 pmem -- percents of total physical memory used by process's resident set
7284 (floating-point number)
7285 args -- command line which invoked the process (string). */)
7288 return system_process_attributes (pid
);
7292 /* This is not called "init_process" because that is the name of a
7293 Mach system call, so it would cause problems on Darwin systems. */
7295 init_process_emacs (void)
7300 inhibit_sentinels
= 0;
7304 if (! noninteractive
|| initialized
)
7307 struct sigaction action
;
7308 emacs_sigaction_init (&action
, deliver_child_signal
);
7309 sigaction (SIGCHLD
, &action
, 0);
7313 FD_ZERO (&input_wait_mask
);
7314 FD_ZERO (&non_keyboard_wait_mask
);
7315 FD_ZERO (&non_process_wait_mask
);
7316 FD_ZERO (&write_mask
);
7317 max_process_desc
= 0;
7318 memset (fd_callback_info
, 0, sizeof (fd_callback_info
));
7320 #ifdef NON_BLOCKING_CONNECT
7321 FD_ZERO (&connect_wait_mask
);
7322 num_pending_connects
= 0;
7325 #ifdef ADAPTIVE_READ_BUFFERING
7326 process_output_delay_count
= 0;
7327 process_output_skip
= 0;
7330 /* Don't do this, it caused infinite select loops. The display
7331 method should call add_keyboard_wait_descriptor on stdin if it
7334 FD_SET (0, &input_wait_mask
);
7337 Vprocess_alist
= Qnil
;
7339 deleted_pid_list
= Qnil
;
7341 for (i
= 0; i
< MAXDESC
; i
++)
7343 chan_process
[i
] = Qnil
;
7344 proc_buffered_char
[i
] = -1;
7346 memset (proc_decode_coding_system
, 0, sizeof proc_decode_coding_system
);
7347 memset (proc_encode_coding_system
, 0, sizeof proc_encode_coding_system
);
7348 #ifdef DATAGRAM_SOCKETS
7349 memset (datagram_address
, 0, sizeof datagram_address
);
7353 Lisp_Object subfeatures
= Qnil
;
7354 const struct socket_options
*sopt
;
7356 #define ADD_SUBFEATURE(key, val) \
7357 subfeatures = pure_cons (pure_cons (key, pure_cons (val, Qnil)), subfeatures)
7359 #ifdef NON_BLOCKING_CONNECT
7360 ADD_SUBFEATURE (QCnowait
, Qt
);
7362 #ifdef DATAGRAM_SOCKETS
7363 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7365 #ifdef HAVE_SEQPACKET
7366 ADD_SUBFEATURE (QCtype
, Qseqpacket
);
7368 #ifdef HAVE_LOCAL_SOCKETS
7369 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7371 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7373 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7375 #ifdef HAVE_GETSOCKNAME
7376 ADD_SUBFEATURE (QCservice
, Qt
);
7378 #if defined (O_NONBLOCK) || defined (O_NDELAY)
7379 ADD_SUBFEATURE (QCserver
, Qt
);
7382 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7383 subfeatures
= pure_cons (intern_c_string (sopt
->name
), subfeatures
);
7385 Fprovide (intern_c_string ("make-network-process"), subfeatures
);
7388 #if defined (DARWIN_OS)
7389 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7390 processes. As such, we only change the default value. */
7393 char const *release
= (STRINGP (Voperating_system_release
)
7394 ? SSDATA (Voperating_system_release
)
7396 if (!release
|| !release
[0] || (release
[0] < '7' && release
[1] == '.')) {
7397 Vprocess_connection_type
= Qnil
;
7401 #endif /* subprocesses */
7406 syms_of_process (void)
7410 DEFSYM (Qprocessp
, "processp");
7411 DEFSYM (Qrun
, "run");
7412 DEFSYM (Qstop
, "stop");
7413 DEFSYM (Qsignal
, "signal");
7415 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7418 Qexit = intern_c_string ("exit");
7419 staticpro (&Qexit); */
7421 DEFSYM (Qopen
, "open");
7422 DEFSYM (Qclosed
, "closed");
7423 DEFSYM (Qconnect
, "connect");
7424 DEFSYM (Qfailed
, "failed");
7425 DEFSYM (Qlisten
, "listen");
7426 DEFSYM (Qlocal
, "local");
7427 DEFSYM (Qipv4
, "ipv4");
7429 DEFSYM (Qipv6
, "ipv6");
7431 DEFSYM (Qdatagram
, "datagram");
7432 DEFSYM (Qseqpacket
, "seqpacket");
7434 DEFSYM (QCport
, ":port");
7435 DEFSYM (QCspeed
, ":speed");
7436 DEFSYM (QCprocess
, ":process");
7438 DEFSYM (QCbytesize
, ":bytesize");
7439 DEFSYM (QCstopbits
, ":stopbits");
7440 DEFSYM (QCparity
, ":parity");
7441 DEFSYM (Qodd
, "odd");
7442 DEFSYM (Qeven
, "even");
7443 DEFSYM (QCflowcontrol
, ":flowcontrol");
7446 DEFSYM (QCsummary
, ":summary");
7448 DEFSYM (Qreal
, "real");
7449 DEFSYM (Qnetwork
, "network");
7450 DEFSYM (Qserial
, "serial");
7451 DEFSYM (QCbuffer
, ":buffer");
7452 DEFSYM (QChost
, ":host");
7453 DEFSYM (QCservice
, ":service");
7454 DEFSYM (QClocal
, ":local");
7455 DEFSYM (QCremote
, ":remote");
7456 DEFSYM (QCcoding
, ":coding");
7457 DEFSYM (QCserver
, ":server");
7458 DEFSYM (QCnowait
, ":nowait");
7459 DEFSYM (QCsentinel
, ":sentinel");
7460 DEFSYM (QClog
, ":log");
7461 DEFSYM (QCnoquery
, ":noquery");
7462 DEFSYM (QCstop
, ":stop");
7463 DEFSYM (QCoptions
, ":options");
7464 DEFSYM (QCplist
, ":plist");
7466 DEFSYM (Qlast_nonmenu_event
, "last-nonmenu-event");
7468 staticpro (&Vprocess_alist
);
7470 staticpro (&deleted_pid_list
);
7473 #endif /* subprocesses */
7475 DEFSYM (QCname
, ":name");
7476 DEFSYM (QCtype
, ":type");
7478 DEFSYM (Qeuid
, "euid");
7479 DEFSYM (Qegid
, "egid");
7480 DEFSYM (Quser
, "user");
7481 DEFSYM (Qgroup
, "group");
7482 DEFSYM (Qcomm
, "comm");
7483 DEFSYM (Qstate
, "state");
7484 DEFSYM (Qppid
, "ppid");
7485 DEFSYM (Qpgrp
, "pgrp");
7486 DEFSYM (Qsess
, "sess");
7487 DEFSYM (Qttname
, "ttname");
7488 DEFSYM (Qtpgid
, "tpgid");
7489 DEFSYM (Qminflt
, "minflt");
7490 DEFSYM (Qmajflt
, "majflt");
7491 DEFSYM (Qcminflt
, "cminflt");
7492 DEFSYM (Qcmajflt
, "cmajflt");
7493 DEFSYM (Qutime
, "utime");
7494 DEFSYM (Qstime
, "stime");
7495 DEFSYM (Qtime
, "time");
7496 DEFSYM (Qcutime
, "cutime");
7497 DEFSYM (Qcstime
, "cstime");
7498 DEFSYM (Qctime
, "ctime");
7499 DEFSYM (Qpri
, "pri");
7500 DEFSYM (Qnice
, "nice");
7501 DEFSYM (Qthcount
, "thcount");
7502 DEFSYM (Qstart
, "start");
7503 DEFSYM (Qvsize
, "vsize");
7504 DEFSYM (Qrss
, "rss");
7505 DEFSYM (Qetime
, "etime");
7506 DEFSYM (Qpcpu
, "pcpu");
7507 DEFSYM (Qpmem
, "pmem");
7508 DEFSYM (Qargs
, "args");
7510 DEFVAR_BOOL ("delete-exited-processes", delete_exited_processes
,
7511 doc
: /* Non-nil means delete processes immediately when they exit.
7512 A value of nil means don't delete them until `list-processes' is run. */);
7514 delete_exited_processes
= 1;
7517 DEFVAR_LISP ("process-connection-type", Vprocess_connection_type
,
7518 doc
: /* Control type of device used to communicate with subprocesses.
7519 Values are nil to use a pipe, or t or `pty' to use a pty.
7520 The value has no effect if the system has no ptys or if all ptys are busy:
7521 then a pipe is used in any case.
7522 The value takes effect when `start-process' is called. */);
7523 Vprocess_connection_type
= Qt
;
7525 #ifdef ADAPTIVE_READ_BUFFERING
7526 DEFVAR_LISP ("process-adaptive-read-buffering", Vprocess_adaptive_read_buffering
,
7527 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7528 On some systems, when Emacs reads the output from a subprocess, the output data
7529 is read in very small blocks, potentially resulting in very poor performance.
7530 This behavior can be remedied to some extent by setting this variable to a
7531 non-nil value, as it will automatically delay reading from such processes, to
7532 allow them to produce more output before Emacs tries to read it.
7533 If the value is t, the delay is reset after each write to the process; any other
7534 non-nil value means that the delay is not reset on write.
7535 The variable takes effect when `start-process' is called. */);
7536 Vprocess_adaptive_read_buffering
= Qt
;
7539 defsubr (&Sprocessp
);
7540 defsubr (&Sget_process
);
7541 defsubr (&Sdelete_process
);
7542 defsubr (&Sprocess_status
);
7543 defsubr (&Sprocess_exit_status
);
7544 defsubr (&Sprocess_id
);
7545 defsubr (&Sprocess_name
);
7546 defsubr (&Sprocess_tty_name
);
7547 defsubr (&Sprocess_command
);
7548 defsubr (&Sset_process_buffer
);
7549 defsubr (&Sprocess_buffer
);
7550 defsubr (&Sprocess_mark
);
7551 defsubr (&Sset_process_filter
);
7552 defsubr (&Sprocess_filter
);
7553 defsubr (&Sset_process_sentinel
);
7554 defsubr (&Sprocess_sentinel
);
7555 defsubr (&Sset_process_window_size
);
7556 defsubr (&Sset_process_inherit_coding_system_flag
);
7557 defsubr (&Sset_process_query_on_exit_flag
);
7558 defsubr (&Sprocess_query_on_exit_flag
);
7559 defsubr (&Sprocess_contact
);
7560 defsubr (&Sprocess_plist
);
7561 defsubr (&Sset_process_plist
);
7562 defsubr (&Sprocess_list
);
7563 defsubr (&Sstart_process
);
7564 defsubr (&Sserial_process_configure
);
7565 defsubr (&Smake_serial_process
);
7566 defsubr (&Sset_network_process_option
);
7567 defsubr (&Smake_network_process
);
7568 defsubr (&Sformat_network_address
);
7569 #if defined (HAVE_NET_IF_H)
7571 defsubr (&Snetwork_interface_list
);
7573 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
7574 defsubr (&Snetwork_interface_info
);
7576 #endif /* defined (HAVE_NET_IF_H) */
7577 #ifdef DATAGRAM_SOCKETS
7578 defsubr (&Sprocess_datagram_address
);
7579 defsubr (&Sset_process_datagram_address
);
7581 defsubr (&Saccept_process_output
);
7582 defsubr (&Sprocess_send_region
);
7583 defsubr (&Sprocess_send_string
);
7584 defsubr (&Sinterrupt_process
);
7585 defsubr (&Skill_process
);
7586 defsubr (&Squit_process
);
7587 defsubr (&Sstop_process
);
7588 defsubr (&Scontinue_process
);
7589 defsubr (&Sprocess_running_child_p
);
7590 defsubr (&Sprocess_send_eof
);
7591 defsubr (&Ssignal_process
);
7592 defsubr (&Swaiting_for_user_input_p
);
7593 defsubr (&Sprocess_type
);
7594 defsubr (&Sset_process_coding_system
);
7595 defsubr (&Sprocess_coding_system
);
7596 defsubr (&Sset_process_filter_multibyte
);
7597 defsubr (&Sprocess_filter_multibyte_p
);
7599 #endif /* subprocesses */
7601 defsubr (&Sget_buffer_process
);
7602 defsubr (&Sprocess_inherit_coding_system_flag
);
7603 defsubr (&Slist_system_processes
);
7604 defsubr (&Sprocess_attributes
);