1 /* Asynchronous subprocess control for GNU Emacs.
3 Copyright (C) 1985-1988, 1993-1996, 1998-1999, 2001-2011
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/>. */
27 #include <sys/types.h> /* some typedefs are used in sys/file.h */
31 #ifdef HAVE_INTTYPES_H
38 /* Only MS-DOS does not define `subprocesses'. */
41 #include <sys/socket.h>
43 #include <netinet/in.h>
44 #include <arpa/inet.h>
46 /* Are local (unix) sockets supported? */
47 #if defined (HAVE_SYS_UN_H)
48 #if !defined (AF_LOCAL) && defined (AF_UNIX)
49 #define AF_LOCAL AF_UNIX
52 #define HAVE_LOCAL_SOCKETS
57 #include <sys/ioctl.h>
58 #if defined(HAVE_NET_IF_H)
60 #endif /* HAVE_NET_IF_H */
67 #include <netinet/in.h>
68 #include <arpa/nameser.h>
80 #endif /* subprocesses */
88 #include "character.h"
92 #include "termhooks.h"
96 #include "blockinput.h"
97 #include "dispextern.h"
98 #include "composite.h"
100 #include "sysselect.h"
101 #include "syssignal.h"
107 #if defined (USE_GTK) || defined (HAVE_GCONF)
108 #include "xgselect.h"
109 #endif /* defined (USE_GTK) || defined (HAVE_GCONF) */
114 Lisp_Object Qeuid
, Qegid
, Qcomm
, Qstate
, Qppid
, Qpgrp
, Qsess
, Qttname
, Qtpgid
;
115 Lisp_Object Qminflt
, Qmajflt
, Qcminflt
, Qcmajflt
, Qutime
, Qstime
, Qcstime
;
116 Lisp_Object Qcutime
, Qpri
, Qnice
, Qthcount
, Qstart
, Qvsize
, Qrss
, Qargs
;
117 Lisp_Object Quser
, Qgroup
, Qetime
, Qpcpu
, Qpmem
, Qtime
, Qctime
;
118 Lisp_Object QCname
, QCtype
;
120 /* Non-zero if keyboard input is on hold, zero otherwise. */
122 static int kbd_is_on_hold
;
124 /* Nonzero means don't run process sentinels. This is used
126 int inhibit_sentinels
;
130 Lisp_Object Qprocessp
;
131 Lisp_Object Qrun
, Qstop
, Qsignal
;
132 Lisp_Object Qopen
, Qclosed
, Qconnect
, Qfailed
, Qlisten
;
133 Lisp_Object Qlocal
, Qipv4
, Qdatagram
, Qseqpacket
;
134 Lisp_Object Qreal
, Qnetwork
, Qserial
;
138 Lisp_Object QCport
, QCspeed
, QCprocess
;
139 Lisp_Object QCbytesize
, QCstopbits
, QCparity
, Qodd
, Qeven
;
140 Lisp_Object QCflowcontrol
, Qhw
, Qsw
, QCsummary
;
141 Lisp_Object QCbuffer
, QChost
, QCservice
;
142 Lisp_Object QClocal
, QCremote
, QCcoding
;
143 Lisp_Object QCserver
, QCnowait
, QCnoquery
, QCstop
;
144 Lisp_Object QCsentinel
, QClog
, QCoptions
, QCplist
;
145 Lisp_Object Qlast_nonmenu_event
;
146 /* QCfamily is declared and initialized in xfaces.c,
147 QCfilter in keyboard.c. */
148 extern Lisp_Object QCfamily
, QCfilter
;
150 /* Qexit is declared and initialized in eval.c. */
152 /* QCfamily is defined in xfaces.c. */
153 extern Lisp_Object QCfamily
;
154 /* QCfilter is defined in keyboard.c. */
155 extern Lisp_Object QCfilter
;
157 #define NETCONN_P(p) (EQ (XPROCESS (p)->type, Qnetwork))
158 #define NETCONN1_P(p) (EQ ((p)->type, Qnetwork))
159 #define SERIALCONN_P(p) (EQ (XPROCESS (p)->type, Qserial))
160 #define SERIALCONN1_P(p) (EQ ((p)->type, Qserial))
162 /* Define first descriptor number available for subprocesses. */
163 #define FIRST_PROC_DESC 3
169 /* These next two vars are non-static since sysdep.c uses them in the
170 emulation of `select'. */
171 /* Number of events of change of status of a process. */
173 /* Number of events for which the user or sentinel has been notified. */
176 /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */
178 /* Only W32 has this, it really means that select can't take write mask. */
179 #ifdef BROKEN_NON_BLOCKING_CONNECT
180 #undef NON_BLOCKING_CONNECT
181 #define SELECT_CANT_DO_WRITE_MASK
183 #ifndef NON_BLOCKING_CONNECT
185 #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX)
186 #if defined (O_NONBLOCK) || defined (O_NDELAY)
187 #if defined (EWOULDBLOCK) || defined (EINPROGRESS)
188 #define NON_BLOCKING_CONNECT
189 #endif /* EWOULDBLOCK || EINPROGRESS */
190 #endif /* O_NONBLOCK || O_NDELAY */
191 #endif /* HAVE_GETPEERNAME || GNU_LINUX */
192 #endif /* HAVE_SELECT */
193 #endif /* NON_BLOCKING_CONNECT */
194 #endif /* BROKEN_NON_BLOCKING_CONNECT */
196 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
197 this system. We need to read full packets, so we need a
198 "non-destructive" select. So we require either native select,
199 or emulation of select using FIONREAD. */
201 #ifdef BROKEN_DATAGRAM_SOCKETS
202 #undef DATAGRAM_SOCKETS
204 #ifndef DATAGRAM_SOCKETS
205 #if defined (HAVE_SELECT) || defined (FIONREAD)
206 #if defined (HAVE_SENDTO) && defined (HAVE_RECVFROM) && defined (EMSGSIZE)
207 #define DATAGRAM_SOCKETS
208 #endif /* HAVE_SENDTO && HAVE_RECVFROM && EMSGSIZE */
209 #endif /* HAVE_SELECT || FIONREAD */
210 #endif /* DATAGRAM_SOCKETS */
211 #endif /* BROKEN_DATAGRAM_SOCKETS */
213 #if defined HAVE_LOCAL_SOCKETS && defined DATAGRAM_SOCKETS
214 # define HAVE_SEQPACKET
217 #if !defined (ADAPTIVE_READ_BUFFERING) && !defined (NO_ADAPTIVE_READ_BUFFERING)
218 #ifdef EMACS_HAS_USECS
219 #define ADAPTIVE_READ_BUFFERING
223 #ifdef ADAPTIVE_READ_BUFFERING
224 #define READ_OUTPUT_DELAY_INCREMENT 10000
225 #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5)
226 #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7)
228 /* Number of processes which have a non-zero read_output_delay,
229 and therefore might be delayed for adaptive read buffering. */
231 static int process_output_delay_count
;
233 /* Non-zero if any process has non-nil read_output_skip. */
235 static int process_output_skip
;
238 #define process_output_delay_count 0
241 static int keyboard_bit_set (SELECT_TYPE
*);
242 static void deactivate_process (Lisp_Object
);
243 static void status_notify (struct Lisp_Process
*);
244 static int read_process_output (Lisp_Object
, int);
245 static void create_pty (Lisp_Object
);
247 /* If we support a window system, turn on the code to poll periodically
248 to detect C-g. It isn't actually used when doing interrupt input. */
249 #ifdef HAVE_WINDOW_SYSTEM
250 #define POLL_FOR_INPUT
253 static Lisp_Object
get_process (register Lisp_Object name
);
254 static void exec_sentinel (Lisp_Object proc
, Lisp_Object reason
);
256 /* Mask of bits indicating the descriptors that we wait for input on. */
258 static SELECT_TYPE input_wait_mask
;
260 /* Mask that excludes keyboard input descriptor(s). */
262 static SELECT_TYPE non_keyboard_wait_mask
;
264 /* Mask that excludes process input descriptor(s). */
266 static SELECT_TYPE non_process_wait_mask
;
268 /* Mask for selecting for write. */
270 static SELECT_TYPE write_mask
;
272 #ifdef NON_BLOCKING_CONNECT
273 /* Mask of bits indicating the descriptors that we wait for connect to
274 complete on. Once they complete, they are removed from this mask
275 and added to the input_wait_mask and non_keyboard_wait_mask. */
277 static SELECT_TYPE connect_wait_mask
;
279 /* Number of bits set in connect_wait_mask. */
280 static int num_pending_connects
;
282 #define IF_NON_BLOCKING_CONNECT(s) s
283 #else /* NON_BLOCKING_CONNECT */
284 #define IF_NON_BLOCKING_CONNECT(s)
285 #endif /* NON_BLOCKING_CONNECT */
287 /* The largest descriptor currently in use for a process object. */
288 static int max_process_desc
;
290 /* The largest descriptor currently in use for input. */
291 static int max_input_desc
;
293 /* Indexed by descriptor, gives the process (if any) for that descriptor */
294 Lisp_Object chan_process
[MAXDESC
];
296 /* Alist of elements (NAME . PROCESS) */
297 Lisp_Object Vprocess_alist
;
299 /* Buffered-ahead input char from process, indexed by channel.
300 -1 means empty (no char is buffered).
301 Used on sys V where the only way to tell if there is any
302 output from the process is to read at least one char.
303 Always -1 on systems that support FIONREAD. */
305 /* Don't make static; need to access externally. */
306 int proc_buffered_char
[MAXDESC
];
308 /* Table of `struct coding-system' for each process. */
309 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
310 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
312 #ifdef DATAGRAM_SOCKETS
313 /* Table of `partner address' for datagram sockets. */
314 struct sockaddr_and_len
{
317 } datagram_address
[MAXDESC
];
318 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
319 #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XPROCESS (proc)->infd].sa != 0)
321 #define DATAGRAM_CHAN_P(chan) (0)
322 #define DATAGRAM_CONN_P(proc) (0)
325 /* Maximum number of bytes to send to a pty without an eof. */
326 static int pty_max_bytes
;
330 struct fd_callback_data
336 int condition
; /* mask of the defines above. */
337 } fd_callback_info
[MAXDESC
];
340 /* Add a file descriptor FD to be monitored for when read is possible.
341 When read is possible, call FUNC with argument DATA. */
344 add_read_fd (int fd
, fd_callback func
, void *data
)
346 xassert (fd
< MAXDESC
);
347 add_keyboard_wait_descriptor (fd
);
349 fd_callback_info
[fd
].func
= func
;
350 fd_callback_info
[fd
].data
= data
;
351 fd_callback_info
[fd
].condition
|= FOR_READ
;
354 /* Stop monitoring file descriptor FD for when read is possible. */
357 delete_read_fd (int fd
)
359 xassert (fd
< MAXDESC
);
360 delete_keyboard_wait_descriptor (fd
);
362 fd_callback_info
[fd
].condition
&= ~FOR_READ
;
363 if (fd_callback_info
[fd
].condition
== 0)
365 fd_callback_info
[fd
].func
= 0;
366 fd_callback_info
[fd
].data
= 0;
370 /* Add a file descriptor FD to be monitored for when write is possible.
371 When write is possible, call FUNC with argument DATA. */
374 add_write_fd (int fd
, fd_callback func
, void *data
)
376 xassert (fd
< MAXDESC
);
377 FD_SET (fd
, &write_mask
);
378 if (fd
> max_input_desc
)
381 fd_callback_info
[fd
].func
= func
;
382 fd_callback_info
[fd
].data
= data
;
383 fd_callback_info
[fd
].condition
|= FOR_WRITE
;
386 /* Stop monitoring file descriptor FD for when write is possible. */
389 delete_write_fd (int fd
)
391 int lim
= max_input_desc
;
393 xassert (fd
< MAXDESC
);
394 FD_CLR (fd
, &write_mask
);
395 fd_callback_info
[fd
].condition
&= ~FOR_WRITE
;
396 if (fd_callback_info
[fd
].condition
== 0)
398 fd_callback_info
[fd
].func
= 0;
399 fd_callback_info
[fd
].data
= 0;
401 if (fd
== max_input_desc
)
402 for (fd
= lim
; fd
>= 0; fd
--)
403 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
413 /* Compute the Lisp form of the process status, p->status, from
414 the numeric status that was returned by `wait'. */
416 static Lisp_Object
status_convert (int);
419 update_status (struct Lisp_Process
*p
)
421 eassert (p
->raw_status_new
);
422 p
->status
= status_convert (p
->raw_status
);
423 p
->raw_status_new
= 0;
426 /* Convert a process status word in Unix format to
427 the list that we use internally. */
430 status_convert (int w
)
433 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
434 else if (WIFEXITED (w
))
435 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
436 WCOREDUMP (w
) ? Qt
: Qnil
));
437 else if (WIFSIGNALED (w
))
438 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
439 WCOREDUMP (w
) ? Qt
: Qnil
));
444 /* Given a status-list, extract the three pieces of information
445 and store them individually through the three pointers. */
448 decode_status (Lisp_Object l
, Lisp_Object
*symbol
, int *code
, int *coredump
)
462 *code
= XFASTINT (XCAR (tem
));
464 *coredump
= !NILP (tem
);
468 /* Return a string describing a process status list. */
471 status_message (struct Lisp_Process
*p
)
473 Lisp_Object status
= p
->status
;
476 Lisp_Object string
, string2
;
478 decode_status (status
, &symbol
, &code
, &coredump
);
480 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
483 synchronize_system_messages_locale ();
484 signame
= strsignal (code
);
486 string
= build_string ("unknown");
491 string
= make_unibyte_string (signame
, strlen (signame
));
492 if (! NILP (Vlocale_coding_system
))
493 string
= (code_convert_string_norecord
494 (string
, Vlocale_coding_system
, 0));
495 c1
= STRING_CHAR (SDATA (string
));
498 Faset (string
, make_number (0), make_number (c2
));
500 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
501 return concat2 (string
, string2
);
503 else if (EQ (symbol
, Qexit
))
506 return build_string (code
== 0 ? "deleted\n" : "connection broken by remote peer\n");
508 return build_string ("finished\n");
509 string
= Fnumber_to_string (make_number (code
));
510 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
511 return concat3 (build_string ("exited abnormally with code "),
514 else if (EQ (symbol
, Qfailed
))
516 string
= Fnumber_to_string (make_number (code
));
517 string2
= build_string ("\n");
518 return concat3 (build_string ("failed with code "),
522 return Fcopy_sequence (Fsymbol_name (symbol
));
527 /* The file name of the pty opened by allocate_pty. */
528 static char pty_name
[24];
530 /* Open an available pty, returning a file descriptor.
531 Return -1 on failure.
532 The file name of the terminal corresponding to the pty
533 is left in the variable pty_name. */
544 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
545 for (i
= 0; i
< 16; i
++)
548 #ifdef PTY_NAME_SPRINTF
551 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
552 #endif /* no PTY_NAME_SPRINTF */
556 #else /* no PTY_OPEN */
558 { /* Some systems name their pseudoterminals so that there are gaps in
559 the usual sequence - for example, on HP9000/S700 systems, there
560 are no pseudoterminals with names ending in 'f'. So we wait for
561 three failures in a row before deciding that we've reached the
563 int failed_count
= 0;
566 if (stat (pty_name
, &stb
) < 0)
569 if (failed_count
>= 3)
576 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
578 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
581 #endif /* no PTY_OPEN */
585 /* check to make certain that both sides are available
586 this avoids a nasty yet stupid bug in rlogins */
587 #ifdef PTY_TTY_NAME_SPRINTF
590 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
591 #endif /* no PTY_TTY_NAME_SPRINTF */
592 if (access (pty_name
, 6) != 0)
607 #endif /* HAVE_PTYS */
610 make_process (Lisp_Object name
)
612 register Lisp_Object val
, tem
, name1
;
613 register struct Lisp_Process
*p
;
617 p
= allocate_process ();
625 p
->raw_status_new
= 0;
627 p
->mark
= Fmake_marker ();
628 p
->kill_without_query
= 0;
630 #ifdef ADAPTIVE_READ_BUFFERING
631 p
->adaptive_read_buffering
= 0;
632 p
->read_output_delay
= 0;
633 p
->read_output_skip
= 0;
637 p
->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
638 p
->gnutls_log_level
= 0;
642 /* If name is already in use, modify it until it is unused. */
647 tem
= Fget_process (name1
);
648 if (NILP (tem
)) break;
649 sprintf (suffix
, "<%d>", i
);
650 name1
= concat2 (name
, build_string (suffix
));
654 XSETPROCESS (val
, p
);
655 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
660 remove_process (register Lisp_Object proc
)
662 register Lisp_Object pair
;
664 pair
= Frassq (proc
, Vprocess_alist
);
665 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
667 deactivate_process (proc
);
671 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
672 doc
: /* Return t if OBJECT is a process. */)
675 return PROCESSP (object
) ? Qt
: Qnil
;
678 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
679 doc
: /* Return the process named NAME, or nil if there is none. */)
680 (register Lisp_Object name
)
685 return Fcdr (Fassoc (name
, Vprocess_alist
));
688 /* This is how commands for the user decode process arguments. It
689 accepts a process, a process name, a buffer, a buffer name, or nil.
690 Buffers denote the first process in the buffer, and nil denotes the
694 get_process (register Lisp_Object name
)
696 register Lisp_Object proc
, obj
;
699 obj
= Fget_process (name
);
701 obj
= Fget_buffer (name
);
703 error ("Process %s does not exist", SDATA (name
));
705 else if (NILP (name
))
706 obj
= Fcurrent_buffer ();
710 /* Now obj should be either a buffer object or a process object.
714 proc
= Fget_buffer_process (obj
);
716 error ("Buffer %s has no process", SDATA (BVAR (XBUFFER (obj
), name
)));
728 /* Fdelete_process promises to immediately forget about the process, but in
729 reality, Emacs needs to remember those processes until they have been
730 treated by sigchld_handler; otherwise this handler would consider the
731 process as being synchronous and say that the synchronous process is
733 static Lisp_Object deleted_pid_list
;
736 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
737 doc
: /* Delete PROCESS: kill it and forget about it immediately.
738 PROCESS may be a process, a buffer, the name of a process or buffer, or
739 nil, indicating the current buffer's process. */)
740 (register Lisp_Object process
)
742 register struct Lisp_Process
*p
;
744 process
= get_process (process
);
745 p
= XPROCESS (process
);
747 p
->raw_status_new
= 0;
748 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
750 p
->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
751 p
->tick
= ++process_tick
;
753 redisplay_preserve_echo_area (13);
755 else if (p
->infd
>= 0)
759 /* Assignment to EMACS_INT stops GCC whining about limited range
761 EMACS_INT pid
= p
->pid
;
763 /* No problem storing the pid here, as it is still in Vprocess_alist. */
764 deleted_pid_list
= Fcons (make_fixnum_or_float (pid
),
765 /* GC treated elements set to nil. */
766 Fdelq (Qnil
, deleted_pid_list
));
767 /* If the process has already signaled, remove it from the list. */
768 if (p
->raw_status_new
)
771 if (CONSP (p
->status
))
772 symbol
= XCAR (p
->status
);
773 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
775 = Fdelete (make_fixnum_or_float (pid
), deleted_pid_list
);
779 Fkill_process (process
, Qnil
);
780 /* Do this now, since remove_process will make sigchld_handler do nothing. */
782 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
783 p
->tick
= ++process_tick
;
785 redisplay_preserve_echo_area (13);
788 remove_process (process
);
792 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
793 doc
: /* Return the status of PROCESS.
794 The returned value is one of the following symbols:
795 run -- for a process that is running.
796 stop -- for a process stopped but continuable.
797 exit -- for a process that has exited.
798 signal -- for a process that has got a fatal signal.
799 open -- for a network stream connection that is open.
800 listen -- for a network stream server that is listening.
801 closed -- for a network stream connection that is closed.
802 connect -- when waiting for a non-blocking connection to complete.
803 failed -- when a non-blocking connection has failed.
804 nil -- if arg is a process name and no such process exists.
805 PROCESS may be a process, a buffer, the name of a process, or
806 nil, indicating the current buffer's process. */)
807 (register Lisp_Object process
)
809 register struct Lisp_Process
*p
;
810 register Lisp_Object status
;
812 if (STRINGP (process
))
813 process
= Fget_process (process
);
815 process
= get_process (process
);
820 p
= XPROCESS (process
);
821 if (p
->raw_status_new
)
825 status
= XCAR (status
);
826 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
828 if (EQ (status
, Qexit
))
830 else if (EQ (p
->command
, Qt
))
832 else if (EQ (status
, Qrun
))
838 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
840 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
841 If PROCESS has not yet exited or died, return 0. */)
842 (register Lisp_Object process
)
844 CHECK_PROCESS (process
);
845 if (XPROCESS (process
)->raw_status_new
)
846 update_status (XPROCESS (process
));
847 if (CONSP (XPROCESS (process
)->status
))
848 return XCAR (XCDR (XPROCESS (process
)->status
));
849 return make_number (0);
852 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
853 doc
: /* Return the process id of PROCESS.
854 This is the pid of the external process which PROCESS uses or talks to.
855 For a network connection, this value is nil. */)
856 (register Lisp_Object process
)
858 /* Assignment to EMACS_INT stops GCC whining about limited range of
862 CHECK_PROCESS (process
);
863 pid
= XPROCESS (process
)->pid
;
864 return (pid
? make_fixnum_or_float (pid
) : Qnil
);
867 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
868 doc
: /* Return the name of PROCESS, as a string.
869 This is the name of the program invoked in PROCESS,
870 possibly modified to make it unique among process names. */)
871 (register Lisp_Object process
)
873 CHECK_PROCESS (process
);
874 return XPROCESS (process
)->name
;
877 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
878 doc
: /* Return the command that was executed to start PROCESS.
879 This is a list of strings, the first string being the program executed
880 and the rest of the strings being the arguments given to it.
881 For a network or serial process, this is nil (process is running) or t
882 \(process is stopped). */)
883 (register Lisp_Object process
)
885 CHECK_PROCESS (process
);
886 return XPROCESS (process
)->command
;
889 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
890 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
891 This is the terminal that the process itself reads and writes on,
892 not the name of the pty that Emacs uses to talk with that terminal. */)
893 (register Lisp_Object process
)
895 CHECK_PROCESS (process
);
896 return XPROCESS (process
)->tty_name
;
899 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
901 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil). */)
902 (register Lisp_Object process
, Lisp_Object buffer
)
904 struct Lisp_Process
*p
;
906 CHECK_PROCESS (process
);
908 CHECK_BUFFER (buffer
);
909 p
= XPROCESS (process
);
911 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
912 p
->childp
= Fplist_put (p
->childp
, QCbuffer
, buffer
);
913 setup_process_coding_systems (process
);
917 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
919 doc
: /* Return the buffer PROCESS is associated with.
920 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
921 (register Lisp_Object process
)
923 CHECK_PROCESS (process
);
924 return XPROCESS (process
)->buffer
;
927 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
929 doc
: /* Return the marker for the end of the last output from PROCESS. */)
930 (register Lisp_Object process
)
932 CHECK_PROCESS (process
);
933 return XPROCESS (process
)->mark
;
936 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
938 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
939 A value of t means stop accepting output from the process.
941 When a process has a filter, its buffer is not used for output.
942 Instead, each time it does output, the entire string of output is
943 passed to the filter.
945 The filter gets two arguments: the process and the string of output.
946 The string argument is normally a multibyte string, except:
947 - if the process' input coding system is no-conversion or raw-text,
948 it is a unibyte string (the non-converted input), or else
949 - if `default-enable-multibyte-characters' is nil, it is a unibyte
950 string (the result of converting the decoded input multibyte
951 string to unibyte with `string-make-unibyte'). */)
952 (register Lisp_Object process
, Lisp_Object filter
)
954 struct Lisp_Process
*p
;
956 CHECK_PROCESS (process
);
957 p
= XPROCESS (process
);
959 /* Don't signal an error if the process' input file descriptor
960 is closed. This could make debugging Lisp more difficult,
961 for example when doing something like
963 (setq process (start-process ...))
965 (set-process-filter process ...) */
969 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
971 FD_CLR (p
->infd
, &input_wait_mask
);
972 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
974 else if (EQ (p
->filter
, Qt
)
975 /* Network or serial process not stopped: */
976 && !EQ (p
->command
, Qt
))
978 FD_SET (p
->infd
, &input_wait_mask
);
979 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
984 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
985 p
->childp
= Fplist_put (p
->childp
, QCfilter
, filter
);
986 setup_process_coding_systems (process
);
990 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
992 doc
: /* Returns the filter function of PROCESS; nil if none.
993 See `set-process-filter' for more info on filter functions. */)
994 (register Lisp_Object process
)
996 CHECK_PROCESS (process
);
997 return XPROCESS (process
)->filter
;
1000 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
1002 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
1003 The sentinel is called as a function when the process changes state.
1004 It gets two arguments: the process, and a string describing the change. */)
1005 (register Lisp_Object process
, Lisp_Object sentinel
)
1007 struct Lisp_Process
*p
;
1009 CHECK_PROCESS (process
);
1010 p
= XPROCESS (process
);
1012 p
->sentinel
= sentinel
;
1013 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1014 p
->childp
= Fplist_put (p
->childp
, QCsentinel
, sentinel
);
1018 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1020 doc
: /* Return the sentinel of PROCESS; nil if none.
1021 See `set-process-sentinel' for more info on sentinels. */)
1022 (register Lisp_Object process
)
1024 CHECK_PROCESS (process
);
1025 return XPROCESS (process
)->sentinel
;
1028 DEFUN ("set-process-window-size", Fset_process_window_size
,
1029 Sset_process_window_size
, 3, 3, 0,
1030 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1031 (register Lisp_Object process
, Lisp_Object height
, Lisp_Object width
)
1033 CHECK_PROCESS (process
);
1034 CHECK_NATNUM (height
);
1035 CHECK_NATNUM (width
);
1037 if (XPROCESS (process
)->infd
< 0
1038 || set_window_size (XPROCESS (process
)->infd
,
1039 XINT (height
), XINT (width
)) <= 0)
1045 DEFUN ("set-process-inherit-coding-system-flag",
1046 Fset_process_inherit_coding_system_flag
,
1047 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1048 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1049 If the second argument FLAG is non-nil, then the variable
1050 `buffer-file-coding-system' of the buffer associated with PROCESS
1051 will be bound to the value of the coding system used to decode
1054 This is useful when the coding system specified for the process buffer
1055 leaves either the character code conversion or the end-of-line conversion
1056 unspecified, or if the coding system used to decode the process output
1057 is more appropriate for saving the process buffer.
1059 Binding the variable `inherit-process-coding-system' to non-nil before
1060 starting the process is an alternative way of setting the inherit flag
1061 for the process which will run. */)
1062 (register Lisp_Object process
, Lisp_Object flag
)
1064 CHECK_PROCESS (process
);
1065 XPROCESS (process
)->inherit_coding_system_flag
= !NILP (flag
);
1069 DEFUN ("set-process-query-on-exit-flag",
1070 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1072 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1073 If the second argument FLAG is non-nil, Emacs will query the user before
1074 exiting or killing a buffer if PROCESS is running. */)
1075 (register Lisp_Object process
, Lisp_Object flag
)
1077 CHECK_PROCESS (process
);
1078 XPROCESS (process
)->kill_without_query
= NILP (flag
);
1082 DEFUN ("process-query-on-exit-flag",
1083 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1085 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1086 (register Lisp_Object process
)
1088 CHECK_PROCESS (process
);
1089 return (XPROCESS (process
)->kill_without_query
? Qnil
: Qt
);
1092 #ifdef DATAGRAM_SOCKETS
1093 Lisp_Object
Fprocess_datagram_address (Lisp_Object process
);
1096 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1098 doc
: /* Return the contact info of PROCESS; t for a real child.
1099 For a network or serial connection, the value depends on the optional
1100 KEY arg. If KEY is nil, value is a cons cell of the form (HOST
1101 SERVICE) for a network connection or (PORT SPEED) for a serial
1102 connection. If KEY is t, the complete contact information for the
1103 connection is returned, else the specific value for the keyword KEY is
1104 returned. See `make-network-process' or `make-serial-process' for a
1105 list of keywords. */)
1106 (register Lisp_Object process
, Lisp_Object key
)
1108 Lisp_Object contact
;
1110 CHECK_PROCESS (process
);
1111 contact
= XPROCESS (process
)->childp
;
1113 #ifdef DATAGRAM_SOCKETS
1114 if (DATAGRAM_CONN_P (process
)
1115 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1116 contact
= Fplist_put (contact
, QCremote
,
1117 Fprocess_datagram_address (process
));
1120 if ((!NETCONN_P (process
) && !SERIALCONN_P (process
)) || EQ (key
, Qt
))
1122 if (NILP (key
) && NETCONN_P (process
))
1123 return Fcons (Fplist_get (contact
, QChost
),
1124 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1125 if (NILP (key
) && SERIALCONN_P (process
))
1126 return Fcons (Fplist_get (contact
, QCport
),
1127 Fcons (Fplist_get (contact
, QCspeed
), Qnil
));
1128 return Fplist_get (contact
, key
);
1131 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1133 doc
: /* Return the plist of PROCESS. */)
1134 (register Lisp_Object process
)
1136 CHECK_PROCESS (process
);
1137 return XPROCESS (process
)->plist
;
1140 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1142 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1143 (register Lisp_Object process
, Lisp_Object plist
)
1145 CHECK_PROCESS (process
);
1148 XPROCESS (process
)->plist
= plist
;
1152 #if 0 /* Turned off because we don't currently record this info
1153 in the process. Perhaps add it. */
1154 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1155 doc
: /* Return the connection type of PROCESS.
1156 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1157 a socket connection. */)
1158 (Lisp_Object process
)
1160 return XPROCESS (process
)->type
;
1164 DEFUN ("process-type", Fprocess_type
, Sprocess_type
, 1, 1, 0,
1165 doc
: /* Return the connection type of PROCESS.
1166 The value is either the symbol `real', `network', or `serial'.
1167 PROCESS may be a process, a buffer, the name of a process or buffer, or
1168 nil, indicating the current buffer's process. */)
1169 (Lisp_Object process
)
1172 proc
= get_process (process
);
1173 return XPROCESS (proc
)->type
;
1176 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1178 doc
: /* Convert network ADDRESS from internal format to a string.
1179 A 4 or 5 element vector represents an IPv4 address (with port number).
1180 An 8 or 9 element vector represents an IPv6 address (with port number).
1181 If optional second argument OMIT-PORT is non-nil, don't include a port
1182 number in the string, even when present in ADDRESS.
1183 Returns nil if format of ADDRESS is invalid. */)
1184 (Lisp_Object address
, Lisp_Object omit_port
)
1189 if (STRINGP (address
)) /* AF_LOCAL */
1192 if (VECTORP (address
)) /* AF_INET or AF_INET6 */
1194 register struct Lisp_Vector
*p
= XVECTOR (address
);
1195 Lisp_Object args
[10];
1198 if (p
->size
== 4 || (p
->size
== 5 && !NILP (omit_port
)))
1200 args
[0] = build_string ("%d.%d.%d.%d");
1203 else if (p
->size
== 5)
1205 args
[0] = build_string ("%d.%d.%d.%d:%d");
1208 else if (p
->size
== 8 || (p
->size
== 9 && !NILP (omit_port
)))
1210 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
1213 else if (p
->size
== 9)
1215 args
[0] = build_string ("[%x:%x:%x:%x:%x:%x:%x:%x]:%d");
1221 for (i
= 0; i
< nargs
; i
++)
1223 EMACS_INT element
= XINT (p
->contents
[i
]);
1225 if (element
< 0 || element
> 65535)
1228 if (nargs
<= 5 /* IPv4 */
1229 && i
< 4 /* host, not port */
1233 args
[i
+1] = p
->contents
[i
];
1236 return Fformat (nargs
+1, args
);
1239 if (CONSP (address
))
1241 Lisp_Object args
[2];
1242 args
[0] = build_string ("<Family %d>");
1243 args
[1] = Fcar (address
);
1244 return Fformat (2, args
);
1251 list_processes_1 (Lisp_Object query_only
)
1253 register Lisp_Object tail
, tem
;
1254 Lisp_Object proc
, minspace
, tem1
;
1255 register struct Lisp_Process
*p
;
1257 int w_proc
, w_buffer
, w_tty
;
1259 Lisp_Object i_status
, i_buffer
, i_tty
, i_command
;
1261 w_proc
= 4; /* Proc */
1262 w_buffer
= 6; /* Buffer */
1263 w_tty
= 0; /* Omit if no ttys */
1265 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
1269 proc
= Fcdr (XCAR (tail
));
1270 p
= XPROCESS (proc
);
1273 if (!NILP (query_only
) && p
->kill_without_query
)
1275 if (STRINGP (p
->name
)
1276 && ( i
= SCHARS (p
->name
), (i
> w_proc
)))
1278 if (!NILP (p
->buffer
))
1280 if (NILP (BVAR (XBUFFER (p
->buffer
), name
)))
1283 w_buffer
= 8; /* (Killed) */
1285 else if ((i
= SCHARS (BVAR (XBUFFER (p
->buffer
), name
)), (i
> w_buffer
)))
1288 if (STRINGP (p
->tty_name
)
1289 && (i
= SCHARS (p
->tty_name
), (i
> w_tty
)))
1293 XSETFASTINT (i_status
, w_proc
+ 1);
1294 XSETFASTINT (i_buffer
, XFASTINT (i_status
) + 9);
1297 XSETFASTINT (i_tty
, XFASTINT (i_buffer
) + w_buffer
+ 1);
1298 XSETFASTINT (i_command
, XFASTINT (i_tty
) + w_tty
+ 1);
1303 XSETFASTINT (i_command
, XFASTINT (i_buffer
) + w_buffer
+ 1);
1306 XSETFASTINT (minspace
, 1);
1308 set_buffer_internal (XBUFFER (Vstandard_output
));
1309 BVAR (current_buffer
, undo_list
) = Qt
;
1311 BVAR (current_buffer
, truncate_lines
) = Qt
;
1313 write_string ("Proc", -1);
1314 Findent_to (i_status
, minspace
); write_string ("Status", -1);
1315 Findent_to (i_buffer
, minspace
); write_string ("Buffer", -1);
1318 Findent_to (i_tty
, minspace
); write_string ("Tty", -1);
1320 Findent_to (i_command
, minspace
); write_string ("Command", -1);
1321 write_string ("\n", -1);
1323 write_string ("----", -1);
1324 Findent_to (i_status
, minspace
); write_string ("------", -1);
1325 Findent_to (i_buffer
, minspace
); write_string ("------", -1);
1328 Findent_to (i_tty
, minspace
); write_string ("---", -1);
1330 Findent_to (i_command
, minspace
); write_string ("-------", -1);
1331 write_string ("\n", -1);
1333 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
1337 proc
= Fcdr (XCAR (tail
));
1338 p
= XPROCESS (proc
);
1341 if (!NILP (query_only
) && p
->kill_without_query
)
1344 Finsert (1, &p
->name
);
1345 Findent_to (i_status
, minspace
);
1347 if (p
->raw_status_new
)
1350 if (CONSP (p
->status
))
1351 symbol
= XCAR (p
->status
);
1353 if (EQ (symbol
, Qsignal
))
1356 tem
= Fcar (Fcdr (p
->status
));
1357 Fprinc (symbol
, Qnil
);
1359 else if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1361 if (EQ (symbol
, Qexit
))
1362 write_string ("closed", -1);
1363 else if (EQ (p
->command
, Qt
))
1364 write_string ("stopped", -1);
1365 else if (EQ (symbol
, Qrun
))
1366 write_string ("open", -1);
1368 Fprinc (symbol
, Qnil
);
1370 else if (SERIALCONN1_P (p
))
1372 write_string ("running", -1);
1375 Fprinc (symbol
, Qnil
);
1377 if (EQ (symbol
, Qexit
))
1380 tem
= Fcar (Fcdr (p
->status
));
1383 sprintf (tembuf
, " %d", (int) XFASTINT (tem
));
1384 write_string (tembuf
, -1);
1388 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
) || EQ (symbol
, Qclosed
))
1391 Findent_to (i_buffer
, minspace
);
1392 if (NILP (p
->buffer
))
1393 insert_string ("(none)");
1394 else if (NILP (BVAR (XBUFFER (p
->buffer
), name
)))
1395 insert_string ("(Killed)");
1397 Finsert (1, &BVAR (XBUFFER (p
->buffer
), name
));
1401 Findent_to (i_tty
, minspace
);
1402 if (STRINGP (p
->tty_name
))
1403 Finsert (1, &p
->tty_name
);
1406 Findent_to (i_command
, minspace
);
1408 if (EQ (p
->status
, Qlisten
))
1410 Lisp_Object port
= Fplist_get (p
->childp
, QCservice
);
1411 if (INTEGERP (port
))
1412 port
= Fnumber_to_string (port
);
1414 port
= Fformat_network_address (Fplist_get (p
->childp
, QClocal
), Qnil
);
1415 sprintf (tembuf
, "(network %s server on %s)\n",
1416 (DATAGRAM_CHAN_P (p
->infd
) ? "datagram" : "stream"),
1417 (STRINGP (port
) ? SSDATA (port
) : "?"));
1418 insert_string (tembuf
);
1420 else if (NETCONN1_P (p
))
1422 /* For a local socket, there is no host name,
1423 so display service instead. */
1424 Lisp_Object host
= Fplist_get (p
->childp
, QChost
);
1425 if (!STRINGP (host
))
1427 host
= Fplist_get (p
->childp
, QCservice
);
1428 if (INTEGERP (host
))
1429 host
= Fnumber_to_string (host
);
1432 host
= Fformat_network_address (Fplist_get (p
->childp
, QCremote
), Qnil
);
1433 sprintf (tembuf
, "(network %s connection to %s)\n",
1434 (DATAGRAM_CHAN_P (p
->infd
) ? "datagram" : "stream"),
1435 (STRINGP (host
) ? SSDATA (host
) : "?"));
1436 insert_string (tembuf
);
1438 else if (SERIALCONN1_P (p
))
1440 Lisp_Object port
= Fplist_get (p
->childp
, QCport
);
1441 Lisp_Object speed
= Fplist_get (p
->childp
, QCspeed
);
1442 insert_string ("(serial port ");
1444 insert_string (SSDATA (port
));
1446 insert_string ("?");
1447 if (INTEGERP (speed
))
1449 sprintf (tembuf
, " at %ld b/s", (long) XINT (speed
));
1450 insert_string (tembuf
);
1452 insert_string (")\n");
1466 insert_string (" ");
1468 insert_string ("\n");
1473 status_notify (NULL
);
1474 redisplay_preserve_echo_area (13);
1479 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 1, "P",
1480 doc
: /* Display a list of all processes.
1481 If optional argument QUERY-ONLY is non-nil, only processes with
1482 the query-on-exit flag set will be listed.
1483 Any process listed as exited or signaled is actually eliminated
1484 after the listing is made. */)
1485 (Lisp_Object query_only
)
1487 internal_with_output_to_temp_buffer ("*Process List*",
1488 list_processes_1
, query_only
);
1492 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1493 doc
: /* Return a list of all processes. */)
1496 return Fmapcar (Qcdr
, Vprocess_alist
);
1499 /* Starting asynchronous inferior processes. */
1501 static Lisp_Object
start_process_unwind (Lisp_Object proc
);
1503 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1504 doc
: /* Start a program in a subprocess. Return the process object for it.
1505 NAME is name for process. It is modified if necessary to make it unique.
1506 BUFFER is the buffer (or buffer name) to associate with the process.
1508 Process output (both standard output and standard error streams) goes
1509 at end of BUFFER, unless you specify an output stream or filter
1510 function to handle the output. BUFFER may also be nil, meaning that
1511 this process is not associated with any buffer.
1513 PROGRAM is the program file name. It is searched for in PATH. If
1514 nil, just associate a pty with the buffer. Remaining arguments are
1515 strings to give program as arguments.
1517 If you want to separate standard output from standard error, invoke
1518 the command through a shell and redirect one of them using the shell
1521 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1522 (int nargs
, register Lisp_Object
*args
)
1524 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1525 register unsigned char **new_argv
;
1527 int count
= SPECPDL_INDEX ();
1531 buffer
= Fget_buffer_create (buffer
);
1533 /* Make sure that the child will be able to chdir to the current
1534 buffer's current directory, or its unhandled equivalent. We
1535 can't just have the child check for an error when it does the
1536 chdir, since it's in a vfork.
1538 We have to GCPRO around this because Fexpand_file_name and
1539 Funhandled_file_name_directory might call a file name handling
1540 function. The argument list is protected by the caller, so all
1541 we really have to worry about is buffer. */
1543 struct gcpro gcpro1
, gcpro2
;
1545 current_dir
= BVAR (current_buffer
, directory
);
1547 GCPRO2 (buffer
, current_dir
);
1549 current_dir
= Funhandled_file_name_directory (current_dir
);
1550 if (NILP (current_dir
))
1551 /* If the file name handler says that current_dir is unreachable, use
1552 a sensible default. */
1553 current_dir
= build_string ("~/");
1554 current_dir
= expand_and_dir_to_file (current_dir
, Qnil
);
1555 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1556 report_file_error ("Setting current directory",
1557 Fcons (BVAR (current_buffer
, directory
), Qnil
));
1563 CHECK_STRING (name
);
1567 if (!NILP (program
))
1568 CHECK_STRING (program
);
1570 proc
= make_process (name
);
1571 /* If an error occurs and we can't start the process, we want to
1572 remove it from the process list. This means that each error
1573 check in create_process doesn't need to call remove_process
1574 itself; it's all taken care of here. */
1575 record_unwind_protect (start_process_unwind
, proc
);
1577 XPROCESS (proc
)->childp
= Qt
;
1578 XPROCESS (proc
)->plist
= Qnil
;
1579 XPROCESS (proc
)->type
= Qreal
;
1580 XPROCESS (proc
)->buffer
= buffer
;
1581 XPROCESS (proc
)->sentinel
= Qnil
;
1582 XPROCESS (proc
)->filter
= Qnil
;
1583 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1586 /* AKA GNUTLS_INITSTAGE(proc). */
1587 XPROCESS (proc
)->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
1588 XPROCESS (proc
)->gnutls_cred_type
= Qnil
;
1591 #ifdef ADAPTIVE_READ_BUFFERING
1592 XPROCESS (proc
)->adaptive_read_buffering
1593 = (NILP (Vprocess_adaptive_read_buffering
) ? 0
1594 : EQ (Vprocess_adaptive_read_buffering
, Qt
) ? 1 : 2);
1597 /* Make the process marker point into the process buffer (if any). */
1598 if (BUFFERP (buffer
))
1599 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1600 BUF_ZV (XBUFFER (buffer
)),
1601 BUF_ZV_BYTE (XBUFFER (buffer
)));
1604 /* Decide coding systems for communicating with the process. Here
1605 we don't setup the structure coding_system nor pay attention to
1606 unibyte mode. They are done in create_process. */
1608 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1609 Lisp_Object coding_systems
= Qt
;
1610 Lisp_Object val
, *args2
;
1611 struct gcpro gcpro1
, gcpro2
;
1613 val
= Vcoding_system_for_read
;
1616 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1617 args2
[0] = Qstart_process
;
1618 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1619 GCPRO2 (proc
, current_dir
);
1620 if (!NILP (program
))
1621 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1623 if (CONSP (coding_systems
))
1624 val
= XCAR (coding_systems
);
1625 else if (CONSP (Vdefault_process_coding_system
))
1626 val
= XCAR (Vdefault_process_coding_system
);
1628 XPROCESS (proc
)->decode_coding_system
= val
;
1630 val
= Vcoding_system_for_write
;
1633 if (EQ (coding_systems
, Qt
))
1635 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof args2
);
1636 args2
[0] = Qstart_process
;
1637 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1638 GCPRO2 (proc
, current_dir
);
1639 if (!NILP (program
))
1640 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1643 if (CONSP (coding_systems
))
1644 val
= XCDR (coding_systems
);
1645 else if (CONSP (Vdefault_process_coding_system
))
1646 val
= XCDR (Vdefault_process_coding_system
);
1648 XPROCESS (proc
)->encode_coding_system
= val
;
1649 /* Note: At this momemnt, the above coding system may leave
1650 text-conversion or eol-conversion unspecified. They will be
1651 decided after we read output from the process and decode it by
1652 some coding system, or just before we actually send a text to
1657 XPROCESS (proc
)->decoding_buf
= empty_unibyte_string
;
1658 XPROCESS (proc
)->decoding_carryover
= 0;
1659 XPROCESS (proc
)->encoding_buf
= empty_unibyte_string
;
1661 XPROCESS (proc
)->inherit_coding_system_flag
1662 = !(NILP (buffer
) || !inherit_process_coding_system
);
1664 if (!NILP (program
))
1666 /* If program file name is not absolute, search our path for it.
1667 Put the name we will really use in TEM. */
1668 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1669 && !(SCHARS (program
) > 1
1670 && IS_DEVICE_SEP (SREF (program
, 1))))
1672 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1675 GCPRO4 (name
, program
, buffer
, current_dir
);
1676 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1679 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1680 tem
= Fexpand_file_name (tem
, Qnil
);
1684 if (!NILP (Ffile_directory_p (program
)))
1685 error ("Specified program for new process is a directory");
1689 /* If program file name starts with /: for quoting a magic name,
1691 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1692 && SREF (tem
, 1) == ':')
1693 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1696 Lisp_Object arg_encoding
= Qnil
;
1697 struct gcpro gcpro1
;
1700 /* Encode the file name and put it in NEW_ARGV.
1701 That's where the child will use it to execute the program. */
1702 tem
= Fcons (ENCODE_FILE (tem
), Qnil
);
1704 /* Here we encode arguments by the coding system used for sending
1705 data to the process. We don't support using different coding
1706 systems for encoding arguments and for encoding data sent to the
1709 for (i
= 3; i
< nargs
; i
++)
1711 tem
= Fcons (args
[i
], tem
);
1712 CHECK_STRING (XCAR (tem
));
1713 if (STRING_MULTIBYTE (XCAR (tem
)))
1715 if (NILP (arg_encoding
))
1716 arg_encoding
= (complement_process_encoding_system
1717 (XPROCESS (proc
)->encode_coding_system
));
1719 code_convert_string_norecord
1720 (XCAR (tem
), arg_encoding
, 1));
1727 /* Now that everything is encoded we can collect the strings into
1729 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1730 new_argv
[nargs
- 2] = 0;
1732 for (i
= nargs
- 3; i
>= 0; i
--)
1734 new_argv
[i
] = SDATA (XCAR (tem
));
1738 create_process (proc
, (char **) new_argv
, current_dir
);
1743 return unbind_to (count
, proc
);
1746 /* This function is the unwind_protect form for Fstart_process. If
1747 PROC doesn't have its pid set, then we know someone has signaled
1748 an error and the process wasn't started successfully, so we should
1749 remove it from the process list. */
1751 start_process_unwind (Lisp_Object proc
)
1753 if (!PROCESSP (proc
))
1756 /* Was PROC started successfully? */
1757 if (XPROCESS (proc
)->pid
== -1)
1758 remove_process (proc
);
1764 create_process_1 (struct atimer
*timer
)
1766 /* Nothing to do. */
1771 create_process (Lisp_Object process
, char **new_argv
, Lisp_Object current_dir
)
1773 int inchannel
, outchannel
;
1776 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1777 int wait_child_setup
[2];
1781 struct sigaction sigint_action
;
1782 struct sigaction sigquit_action
;
1783 struct sigaction sigpipe_action
;
1785 struct sigaction sighup_action
;
1787 /* Use volatile to protect variables from being clobbered by longjmp. */
1788 volatile int forkin
, forkout
;
1789 volatile int pty_flag
= 0;
1791 extern char **environ
;
1794 inchannel
= outchannel
= -1;
1797 if (!NILP (Vprocess_connection_type
))
1798 outchannel
= inchannel
= allocate_pty ();
1802 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1803 /* On most USG systems it does not work to open the pty's tty here,
1804 then close it and reopen it in the child. */
1806 /* Don't let this terminal become our controlling terminal
1807 (in case we don't have one). */
1808 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1810 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1813 report_file_error ("Opening pty", Qnil
);
1815 forkin
= forkout
= -1;
1816 #endif /* not USG, or USG_SUBTTY_WORKS */
1820 #endif /* HAVE_PTYS */
1825 report_file_error ("Creating pipe", Qnil
);
1831 emacs_close (inchannel
);
1832 emacs_close (forkout
);
1833 report_file_error ("Creating pipe", Qnil
);
1839 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1843 tem
= pipe (wait_child_setup
);
1845 report_file_error ("Creating pipe", Qnil
);
1846 tem
= fcntl (wait_child_setup
[1], F_GETFD
, 0);
1848 tem
= fcntl (wait_child_setup
[1], F_SETFD
, tem
| FD_CLOEXEC
);
1851 emacs_close (wait_child_setup
[0]);
1852 emacs_close (wait_child_setup
[1]);
1853 report_file_error ("Setting file descriptor flags", Qnil
);
1859 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1860 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1863 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1864 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1868 /* Record this as an active process, with its channels.
1869 As a result, child_setup will close Emacs's side of the pipes. */
1870 chan_process
[inchannel
] = process
;
1871 XPROCESS (process
)->infd
= inchannel
;
1872 XPROCESS (process
)->outfd
= outchannel
;
1874 /* Previously we recorded the tty descriptor used in the subprocess.
1875 It was only used for getting the foreground tty process, so now
1876 we just reopen the device (see emacs_get_tty_pgrp) as this is
1877 more portable (see USG_SUBTTY_WORKS above). */
1879 XPROCESS (process
)->pty_flag
= pty_flag
;
1880 XPROCESS (process
)->status
= Qrun
;
1881 setup_process_coding_systems (process
);
1883 /* Delay interrupts until we have a chance to store
1884 the new fork's pid in its process structure */
1885 sigemptyset (&blocked
);
1887 sigaddset (&blocked
, SIGCHLD
);
1889 #ifdef HAVE_WORKING_VFORK
1890 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1891 this sets the parent's signal handlers as well as the child's.
1892 So delay all interrupts whose handlers the child might munge,
1893 and record the current handlers so they can be restored later. */
1894 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1895 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1896 sigaddset (&blocked
, SIGPIPE
); sigaction (SIGPIPE
, 0, &sigpipe_action
);
1898 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1900 #endif /* HAVE_WORKING_VFORK */
1901 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1903 FD_SET (inchannel
, &input_wait_mask
);
1904 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1905 if (inchannel
> max_process_desc
)
1906 max_process_desc
= inchannel
;
1908 /* Until we store the proper pid, enable sigchld_handler
1909 to recognize an unknown pid as standing for this process.
1910 It is very important not to let this `marker' value stay
1911 in the table after this function has returned; if it does
1912 it might cause call-process to hang and subsequent asynchronous
1913 processes to get their return values scrambled. */
1914 XPROCESS (process
)->pid
= -1;
1919 /* child_setup must clobber environ on systems with true vfork.
1920 Protect it from permanent change. */
1921 char **save_environ
= environ
;
1923 current_dir
= ENCODE_FILE (current_dir
);
1928 #endif /* not WINDOWSNT */
1930 int xforkin
= forkin
;
1931 int xforkout
= forkout
;
1933 #if 0 /* This was probably a mistake--it duplicates code later on,
1934 but fails to handle all the cases. */
1935 /* Make sure SIGCHLD is not blocked in the child. */
1936 sigsetmask (SIGEMPTYMASK
);
1939 /* Make the pty be the controlling terminal of the process. */
1941 /* First, disconnect its current controlling terminal. */
1943 /* We tried doing setsid only if pty_flag, but it caused
1944 process_set_signal to fail on SGI when using a pipe. */
1946 /* Make the pty's terminal the controlling terminal. */
1947 if (pty_flag
&& xforkin
>= 0)
1950 /* We ignore the return value
1951 because faith@cs.unc.edu says that is necessary on Linux. */
1952 ioctl (xforkin
, TIOCSCTTY
, 0);
1955 #else /* not HAVE_SETSID */
1957 /* It's very important to call setpgrp here and no time
1958 afterwards. Otherwise, we lose our controlling tty which
1959 is set when we open the pty. */
1962 #endif /* not HAVE_SETSID */
1963 #if defined (LDISC1)
1964 if (pty_flag
&& xforkin
>= 0)
1967 tcgetattr (xforkin
, &t
);
1969 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1970 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1973 #if defined (NTTYDISC) && defined (TIOCSETD)
1974 if (pty_flag
&& xforkin
>= 0)
1976 /* Use new line discipline. */
1977 int ldisc
= NTTYDISC
;
1978 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1983 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1984 can do TIOCSPGRP only to the process's controlling tty. */
1987 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1988 I can't test it since I don't have 4.3. */
1989 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1992 ioctl (j
, TIOCNOTTY
, 0);
1996 /* In order to get a controlling terminal on some versions
1997 of BSD, it is necessary to put the process in pgrp 0
1998 before it opens the terminal. */
2006 #endif /* TIOCNOTTY */
2008 #if !defined (DONT_REOPEN_PTY)
2009 /*** There is a suggestion that this ought to be a
2010 conditional on TIOCSPGRP,
2011 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
2012 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
2013 that system does seem to need this code, even though
2014 both HAVE_SETSID and TIOCSCTTY are defined. */
2015 /* Now close the pty (if we had it open) and reopen it.
2016 This makes the pty the controlling terminal of the subprocess. */
2020 /* I wonder if emacs_close (emacs_open (pty_name, ...))
2023 emacs_close (xforkin
);
2024 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
2028 emacs_write (1, "Couldn't open the pty terminal ", 31);
2029 emacs_write (1, pty_name
, strlen (pty_name
));
2030 emacs_write (1, "\n", 1);
2035 #endif /* not DONT_REOPEN_PTY */
2037 #ifdef SETUP_SLAVE_PTY
2042 #endif /* SETUP_SLAVE_PTY */
2044 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
2045 Now reenable it in the child, so it will die when we want it to. */
2047 signal (SIGHUP
, SIG_DFL
);
2049 #endif /* HAVE_PTYS */
2051 signal (SIGINT
, SIG_DFL
);
2052 signal (SIGQUIT
, SIG_DFL
);
2053 /* GConf causes us to ignore SIGPIPE, make sure it is restored
2055 signal (SIGPIPE
, SIG_DFL
);
2057 /* Stop blocking signals in the child. */
2058 sigprocmask (SIG_SETMASK
, &procmask
, 0);
2061 child_setup_tty (xforkout
);
2063 pid
= child_setup (xforkin
, xforkout
, xforkout
,
2064 new_argv
, 1, current_dir
);
2065 #else /* not WINDOWSNT */
2067 emacs_close (wait_child_setup
[0]);
2069 child_setup (xforkin
, xforkout
, xforkout
,
2070 new_argv
, 1, current_dir
);
2071 #endif /* not WINDOWSNT */
2073 environ
= save_environ
;
2078 /* This runs in the Emacs process. */
2082 emacs_close (forkin
);
2083 if (forkin
!= forkout
&& forkout
>= 0)
2084 emacs_close (forkout
);
2088 /* vfork succeeded. */
2089 XPROCESS (process
)->pid
= pid
;
2092 register_child (pid
, inchannel
);
2093 #endif /* WINDOWSNT */
2095 /* If the subfork execv fails, and it exits,
2096 this close hangs. I don't know why.
2097 So have an interrupt jar it loose. */
2099 struct atimer
*timer
;
2103 EMACS_SET_SECS_USECS (offset
, 1, 0);
2104 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
2107 emacs_close (forkin
);
2109 cancel_atimer (timer
);
2113 if (forkin
!= forkout
&& forkout
>= 0)
2114 emacs_close (forkout
);
2118 XPROCESS (process
)->tty_name
= build_string (pty_name
);
2121 XPROCESS (process
)->tty_name
= Qnil
;
2123 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
2124 /* Wait for child_setup to complete in case that vfork is
2125 actually defined as fork. The descriptor wait_child_setup[1]
2126 of a pipe is closed at the child side either by close-on-exec
2127 on successful execvp or the _exit call in child_setup. */
2131 emacs_close (wait_child_setup
[1]);
2132 emacs_read (wait_child_setup
[0], &dummy
, 1);
2133 emacs_close (wait_child_setup
[0]);
2138 /* Restore the signal state whether vfork succeeded or not.
2139 (We will signal an error, below, if it failed.) */
2140 #ifdef HAVE_WORKING_VFORK
2141 /* Restore the parent's signal handlers. */
2142 sigaction (SIGINT
, &sigint_action
, 0);
2143 sigaction (SIGQUIT
, &sigquit_action
, 0);
2144 sigaction (SIGPIPE
, &sigpipe_action
, 0);
2146 sigaction (SIGHUP
, &sighup_action
, 0);
2148 #endif /* HAVE_WORKING_VFORK */
2149 /* Stop blocking signals in the parent. */
2150 sigprocmask (SIG_SETMASK
, &procmask
, 0);
2152 /* Now generate the error if vfork failed. */
2154 report_file_error ("Doing vfork", Qnil
);
2158 create_pty (Lisp_Object process
)
2160 int inchannel
, outchannel
;
2162 /* Use volatile to protect variables from being clobbered by longjmp. */
2163 volatile int forkin
, forkout
;
2164 volatile int pty_flag
= 0;
2166 inchannel
= outchannel
= -1;
2169 if (!NILP (Vprocess_connection_type
))
2170 outchannel
= inchannel
= allocate_pty ();
2174 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
2175 /* On most USG systems it does not work to open the pty's tty here,
2176 then close it and reopen it in the child. */
2178 /* Don't let this terminal become our controlling terminal
2179 (in case we don't have one). */
2180 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
2182 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
2185 report_file_error ("Opening pty", Qnil
);
2186 #if defined (DONT_REOPEN_PTY)
2187 /* In the case that vfork is defined as fork, the parent process
2188 (Emacs) may send some data before the child process completes
2189 tty options setup. So we setup tty before forking. */
2190 child_setup_tty (forkout
);
2191 #endif /* DONT_REOPEN_PTY */
2193 forkin
= forkout
= -1;
2194 #endif /* not USG, or USG_SUBTTY_WORKS */
2197 #endif /* HAVE_PTYS */
2200 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
2201 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
2204 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
2205 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
2209 /* Record this as an active process, with its channels.
2210 As a result, child_setup will close Emacs's side of the pipes. */
2211 chan_process
[inchannel
] = process
;
2212 XPROCESS (process
)->infd
= inchannel
;
2213 XPROCESS (process
)->outfd
= outchannel
;
2215 /* Previously we recorded the tty descriptor used in the subprocess.
2216 It was only used for getting the foreground tty process, so now
2217 we just reopen the device (see emacs_get_tty_pgrp) as this is
2218 more portable (see USG_SUBTTY_WORKS above). */
2220 XPROCESS (process
)->pty_flag
= pty_flag
;
2221 XPROCESS (process
)->status
= Qrun
;
2222 setup_process_coding_systems (process
);
2224 FD_SET (inchannel
, &input_wait_mask
);
2225 FD_SET (inchannel
, &non_keyboard_wait_mask
);
2226 if (inchannel
> max_process_desc
)
2227 max_process_desc
= inchannel
;
2229 XPROCESS (process
)->pid
= -2;
2232 XPROCESS (process
)->tty_name
= build_string (pty_name
);
2235 XPROCESS (process
)->tty_name
= Qnil
;
2239 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2240 The address family of sa is not included in the result. */
2243 conv_sockaddr_to_lisp (struct sockaddr
*sa
, int len
)
2245 Lisp_Object address
;
2248 register struct Lisp_Vector
*p
;
2250 /* Workaround for a bug in getsockname on BSD: Names bound to
2251 sockets in the UNIX domain are inaccessible; getsockname returns
2252 a zero length name. */
2253 if (len
< offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
))
2254 return empty_unibyte_string
;
2256 switch (sa
->sa_family
)
2260 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2261 len
= sizeof (sin
->sin_addr
) + 1;
2262 address
= Fmake_vector (make_number (len
), Qnil
);
2263 p
= XVECTOR (address
);
2264 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2265 cp
= (unsigned char *) &sin
->sin_addr
;
2271 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2272 uint16_t *ip6
= (uint16_t *) &sin6
->sin6_addr
;
2273 len
= sizeof (sin6
->sin6_addr
)/2 + 1;
2274 address
= Fmake_vector (make_number (len
), Qnil
);
2275 p
= XVECTOR (address
);
2276 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
2277 for (i
= 0; i
< len
; i
++)
2278 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
2282 #ifdef HAVE_LOCAL_SOCKETS
2285 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2286 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2287 if (sockun
->sun_path
[i
] == 0)
2289 return make_unibyte_string (sockun
->sun_path
, i
);
2293 len
-= offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
);
2294 address
= Fcons (make_number (sa
->sa_family
),
2295 Fmake_vector (make_number (len
), Qnil
));
2296 p
= XVECTOR (XCDR (address
));
2297 cp
= (unsigned char *) &sa
->sa_family
+ sizeof (sa
->sa_family
);
2303 p
->contents
[i
++] = make_number (*cp
++);
2309 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2312 get_lisp_to_sockaddr_size (Lisp_Object address
, int *familyp
)
2314 register struct Lisp_Vector
*p
;
2316 if (VECTORP (address
))
2318 p
= XVECTOR (address
);
2322 return sizeof (struct sockaddr_in
);
2325 else if (p
->size
== 9)
2327 *familyp
= AF_INET6
;
2328 return sizeof (struct sockaddr_in6
);
2332 #ifdef HAVE_LOCAL_SOCKETS
2333 else if (STRINGP (address
))
2335 *familyp
= AF_LOCAL
;
2336 return sizeof (struct sockaddr_un
);
2339 else if (CONSP (address
) && INTEGERP (XCAR (address
)) && VECTORP (XCDR (address
)))
2341 struct sockaddr
*sa
;
2342 *familyp
= XINT (XCAR (address
));
2343 p
= XVECTOR (XCDR (address
));
2344 return p
->size
+ sizeof (sa
->sa_family
);
2349 /* Convert an address object (vector or string) to an internal sockaddr.
2351 The address format has been basically validated by
2352 get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid;
2353 it could have come from user data. So if FAMILY is not valid,
2354 we return after zeroing *SA. */
2357 conv_lisp_to_sockaddr (int family
, Lisp_Object address
, struct sockaddr
*sa
, int len
)
2359 register struct Lisp_Vector
*p
;
2360 register unsigned char *cp
= NULL
;
2363 memset (sa
, 0, len
);
2365 if (VECTORP (address
))
2367 p
= XVECTOR (address
);
2368 if (family
== AF_INET
)
2370 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2371 len
= sizeof (sin
->sin_addr
) + 1;
2372 i
= XINT (p
->contents
[--len
]);
2373 sin
->sin_port
= htons (i
);
2374 cp
= (unsigned char *)&sin
->sin_addr
;
2375 sa
->sa_family
= family
;
2378 else if (family
== AF_INET6
)
2380 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2381 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2382 len
= sizeof (sin6
->sin6_addr
) + 1;
2383 i
= XINT (p
->contents
[--len
]);
2384 sin6
->sin6_port
= htons (i
);
2385 for (i
= 0; i
< len
; i
++)
2386 if (INTEGERP (p
->contents
[i
]))
2388 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2391 sa
->sa_family
= family
;
2398 else if (STRINGP (address
))
2400 #ifdef HAVE_LOCAL_SOCKETS
2401 if (family
== AF_LOCAL
)
2403 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2404 cp
= SDATA (address
);
2405 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2406 sockun
->sun_path
[i
] = *cp
++;
2407 sa
->sa_family
= family
;
2414 p
= XVECTOR (XCDR (address
));
2415 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2418 for (i
= 0; i
< len
; i
++)
2419 if (INTEGERP (p
->contents
[i
]))
2420 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2423 #ifdef DATAGRAM_SOCKETS
2424 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2426 doc
: /* Get the current datagram address associated with PROCESS. */)
2427 (Lisp_Object process
)
2431 CHECK_PROCESS (process
);
2433 if (!DATAGRAM_CONN_P (process
))
2436 channel
= XPROCESS (process
)->infd
;
2437 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2438 datagram_address
[channel
].len
);
2441 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2443 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2444 Returns nil upon error setting address, ADDRESS otherwise. */)
2445 (Lisp_Object process
, Lisp_Object address
)
2450 CHECK_PROCESS (process
);
2452 if (!DATAGRAM_CONN_P (process
))
2455 channel
= XPROCESS (process
)->infd
;
2457 len
= get_lisp_to_sockaddr_size (address
, &family
);
2458 if (datagram_address
[channel
].len
!= len
)
2460 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2466 static const struct socket_options
{
2467 /* The name of this option. Should be lowercase version of option
2468 name without SO_ prefix. */
2470 /* Option level SOL_... */
2472 /* Option number SO_... */
2474 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2475 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2476 } socket_options
[] =
2478 #ifdef SO_BINDTODEVICE
2479 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2482 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2485 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2488 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2491 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2494 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2497 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2500 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2502 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2505 /* Set option OPT to value VAL on socket S.
2507 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2508 Signals an error if setting a known option fails.
2512 set_socket_option (int s
, Lisp_Object opt
, Lisp_Object val
)
2515 const struct socket_options
*sopt
;
2520 name
= SSDATA (SYMBOL_NAME (opt
));
2521 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2522 if (strcmp (name
, sopt
->name
) == 0)
2525 switch (sopt
->opttype
)
2530 optval
= NILP (val
) ? 0 : 1;
2531 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2532 &optval
, sizeof (optval
));
2540 optval
= XINT (val
);
2542 error ("Bad option value for %s", name
);
2543 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2544 &optval
, sizeof (optval
));
2548 #ifdef SO_BINDTODEVICE
2551 char devname
[IFNAMSIZ
+1];
2553 /* This is broken, at least in the Linux 2.4 kernel.
2554 To unbind, the arg must be a zero integer, not the empty string.
2555 This should work on all systems. KFS. 2003-09-23. */
2556 memset (devname
, 0, sizeof devname
);
2559 char *arg
= SSDATA (val
);
2560 int len
= min (strlen (arg
), IFNAMSIZ
);
2561 memcpy (devname
, arg
, len
);
2563 else if (!NILP (val
))
2564 error ("Bad option value for %s", name
);
2565 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2574 struct linger linger
;
2577 linger
.l_linger
= 0;
2579 linger
.l_linger
= XINT (val
);
2581 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2582 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2583 &linger
, sizeof (linger
));
2593 report_file_error ("Cannot set network option",
2594 Fcons (opt
, Fcons (val
, Qnil
)));
2595 return (1 << sopt
->optbit
);
2599 DEFUN ("set-network-process-option",
2600 Fset_network_process_option
, Sset_network_process_option
,
2602 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2603 See `make-network-process' for a list of options and values.
2604 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2605 OPTION is not a supported option, return nil instead; otherwise return t. */)
2606 (Lisp_Object process
, Lisp_Object option
, Lisp_Object value
, Lisp_Object no_error
)
2609 struct Lisp_Process
*p
;
2611 CHECK_PROCESS (process
);
2612 p
= XPROCESS (process
);
2613 if (!NETCONN1_P (p
))
2614 error ("Process is not a network process");
2618 error ("Process is not running");
2620 if (set_socket_option (s
, option
, value
))
2622 p
->childp
= Fplist_put (p
->childp
, option
, value
);
2626 if (NILP (no_error
))
2627 error ("Unknown or unsupported option");
2633 DEFUN ("serial-process-configure",
2634 Fserial_process_configure
,
2635 Sserial_process_configure
,
2637 doc
: /* Configure speed, bytesize, etc. of a serial process.
2639 Arguments are specified as keyword/argument pairs. Attributes that
2640 are not given are re-initialized from the process's current
2641 configuration (available via the function `process-contact') or set to
2642 reasonable default values. The following arguments are defined:
2648 -- Any of these arguments can be given to identify the process that is
2649 to be configured. If none of these arguments is given, the current
2650 buffer's process is used.
2652 :speed SPEED -- SPEED is the speed of the serial port in bits per
2653 second, also called baud rate. Any value can be given for SPEED, but
2654 most serial ports work only at a few defined values between 1200 and
2655 115200, with 9600 being the most common value. If SPEED is nil, the
2656 serial port is not configured any further, i.e., all other arguments
2657 are ignored. This may be useful for special serial ports such as
2658 Bluetooth-to-serial converters which can only be configured through AT
2659 commands. A value of nil for SPEED can be used only when passed
2660 through `make-serial-process' or `serial-term'.
2662 :bytesize BYTESIZE -- BYTESIZE is the number of bits per byte, which
2663 can be 7 or 8. If BYTESIZE is not given or nil, a value of 8 is used.
2665 :parity PARITY -- PARITY can be nil (don't use parity), the symbol
2666 `odd' (use odd parity), or the symbol `even' (use even parity). If
2667 PARITY is not given, no parity is used.
2669 :stopbits STOPBITS -- STOPBITS is the number of stopbits used to
2670 terminate a byte transmission. STOPBITS can be 1 or 2. If STOPBITS
2671 is not given or nil, 1 stopbit is used.
2673 :flowcontrol FLOWCONTROL -- FLOWCONTROL determines the type of
2674 flowcontrol to be used, which is either nil (don't use flowcontrol),
2675 the symbol `hw' (use RTS/CTS hardware flowcontrol), or the symbol `sw'
2676 \(use XON/XOFF software flowcontrol). If FLOWCONTROL is not given, no
2677 flowcontrol is used.
2679 `serial-process-configure' is called by `make-serial-process' for the
2680 initial configuration of the serial port.
2684 \(serial-process-configure :process "/dev/ttyS0" :speed 1200)
2686 \(serial-process-configure
2687 :buffer "COM1" :stopbits 1 :parity 'odd :flowcontrol 'hw)
2689 \(serial-process-configure :port "\\\\.\\COM13" :bytesize 7)
2691 usage: (serial-process-configure &rest ARGS) */)
2692 (int nargs
, Lisp_Object
*args
)
2694 struct Lisp_Process
*p
;
2695 Lisp_Object contact
= Qnil
;
2696 Lisp_Object proc
= Qnil
;
2697 struct gcpro gcpro1
;
2699 contact
= Flist (nargs
, args
);
2702 proc
= Fplist_get (contact
, QCprocess
);
2704 proc
= Fplist_get (contact
, QCname
);
2706 proc
= Fplist_get (contact
, QCbuffer
);
2708 proc
= Fplist_get (contact
, QCport
);
2709 proc
= get_process (proc
);
2710 p
= XPROCESS (proc
);
2711 if (!EQ (p
->type
, Qserial
))
2712 error ("Not a serial process");
2714 if (NILP (Fplist_get (p
->childp
, QCspeed
)))
2720 serial_configure (p
, contact
);
2726 /* Used by make-serial-process to recover from errors. */
2727 Lisp_Object
make_serial_process_unwind (Lisp_Object proc
)
2729 if (!PROCESSP (proc
))
2731 remove_process (proc
);
2735 DEFUN ("make-serial-process", Fmake_serial_process
, Smake_serial_process
,
2737 doc
: /* Create and return a serial port process.
2739 In Emacs, serial port connections are represented by process objects,
2740 so input and output work as for subprocesses, and `delete-process'
2741 closes a serial port connection. However, a serial process has no
2742 process id, it cannot be signaled, and the status codes are different
2743 from normal processes.
2745 `make-serial-process' creates a process and a buffer, on which you
2746 probably want to use `process-send-string'. Try \\[serial-term] for
2747 an interactive terminal. See below for examples.
2749 Arguments are specified as keyword/argument pairs. The following
2750 arguments are defined:
2752 :port PORT -- (mandatory) PORT is the path or name of the serial port.
2753 For example, this could be "/dev/ttyS0" on Unix. On Windows, this
2754 could be "COM1", or "\\\\.\\COM10" for ports higher than COM9 (double
2755 the backslashes in strings).
2757 :speed SPEED -- (mandatory) is handled by `serial-process-configure',
2758 which is called by `make-serial-process'.
2760 :name NAME -- NAME is the name of the process. If NAME is not given,
2761 the value of PORT is used.
2763 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2764 with the process. Process output goes at the end of that buffer,
2765 unless you specify an output stream or filter function to handle the
2766 output. If BUFFER is not given, the value of NAME is used.
2768 :coding CODING -- If CODING is a symbol, it specifies the coding
2769 system used for both reading and writing for this process. If CODING
2770 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2771 ENCODING is used for writing.
2773 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2774 the process is running. If BOOL is not given, query before exiting.
2776 :stop BOOL -- Start process in the `stopped' state if BOOL is non-nil.
2777 In the stopped state, a serial process does not accept incoming data,
2778 but you can send outgoing data. The stopped state is cleared by
2779 `continue-process' and set by `stop-process'.
2781 :filter FILTER -- Install FILTER as the process filter.
2783 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2785 :plist PLIST -- Install PLIST as the initial plist of the process.
2792 -- These arguments are handled by `serial-process-configure', which is
2793 called by `make-serial-process'.
2795 The original argument list, possibly modified by later configuration,
2796 is available via the function `process-contact'.
2800 \(make-serial-process :port "/dev/ttyS0" :speed 9600)
2802 \(make-serial-process :port "COM1" :speed 115200 :stopbits 2)
2804 \(make-serial-process :port "\\\\.\\COM13" :speed 1200 :bytesize 7 :parity 'odd)
2806 \(make-serial-process :port "/dev/tty.BlueConsole-SPP-1" :speed nil)
2808 usage: (make-serial-process &rest ARGS) */)
2809 (int nargs
, Lisp_Object
*args
)
2812 Lisp_Object proc
, contact
, port
;
2813 struct Lisp_Process
*p
;
2814 struct gcpro gcpro1
;
2815 Lisp_Object name
, buffer
;
2816 Lisp_Object tem
, val
;
2817 int specpdl_count
= -1;
2822 contact
= Flist (nargs
, args
);
2825 port
= Fplist_get (contact
, QCport
);
2827 error ("No port specified");
2828 CHECK_STRING (port
);
2830 if (NILP (Fplist_member (contact
, QCspeed
)))
2831 error (":speed not specified");
2832 if (!NILP (Fplist_get (contact
, QCspeed
)))
2833 CHECK_NUMBER (Fplist_get (contact
, QCspeed
));
2835 name
= Fplist_get (contact
, QCname
);
2838 CHECK_STRING (name
);
2839 proc
= make_process (name
);
2840 specpdl_count
= SPECPDL_INDEX ();
2841 record_unwind_protect (make_serial_process_unwind
, proc
);
2842 p
= XPROCESS (proc
);
2844 fd
= serial_open (SSDATA (port
));
2847 if (fd
> max_process_desc
)
2848 max_process_desc
= fd
;
2849 chan_process
[fd
] = proc
;
2851 buffer
= Fplist_get (contact
, QCbuffer
);
2854 buffer
= Fget_buffer_create (buffer
);
2857 p
->childp
= contact
;
2858 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
2860 p
->sentinel
= Fplist_get (contact
, QCsentinel
);
2861 p
->filter
= Fplist_get (contact
, QCfilter
);
2863 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
2864 p
->kill_without_query
= 1;
2865 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
2869 if (!EQ (p
->command
, Qt
))
2871 FD_SET (fd
, &input_wait_mask
);
2872 FD_SET (fd
, &non_keyboard_wait_mask
);
2875 if (BUFFERP (buffer
))
2877 set_marker_both (p
->mark
, buffer
,
2878 BUF_ZV (XBUFFER (buffer
)),
2879 BUF_ZV_BYTE (XBUFFER (buffer
)));
2882 tem
= Fplist_member (contact
, QCcoding
);
2883 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
2889 val
= XCAR (XCDR (tem
));
2893 else if (!NILP (Vcoding_system_for_read
))
2894 val
= Vcoding_system_for_read
;
2895 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2896 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2898 p
->decode_coding_system
= val
;
2903 val
= XCAR (XCDR (tem
));
2907 else if (!NILP (Vcoding_system_for_write
))
2908 val
= Vcoding_system_for_write
;
2909 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2910 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2912 p
->encode_coding_system
= val
;
2914 setup_process_coding_systems (proc
);
2915 p
->decoding_buf
= empty_unibyte_string
;
2916 p
->decoding_carryover
= 0;
2917 p
->encoding_buf
= empty_unibyte_string
;
2918 p
->inherit_coding_system_flag
2919 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
2921 Fserial_process_configure (nargs
, args
);
2923 specpdl_ptr
= specpdl
+ specpdl_count
;
2929 /* Create a network stream/datagram client/server process. Treated
2930 exactly like a normal process when reading and writing. Primary
2931 differences are in status display and process deletion. A network
2932 connection has no PID; you cannot signal it. All you can do is
2933 stop/continue it and deactivate/close it via delete-process */
2935 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2937 doc
: /* Create and return a network server or client process.
2939 In Emacs, network connections are represented by process objects, so
2940 input and output work as for subprocesses and `delete-process' closes
2941 a network connection. However, a network process has no process id,
2942 it cannot be signaled, and the status codes are different from normal
2945 Arguments are specified as keyword/argument pairs. The following
2946 arguments are defined:
2948 :name NAME -- NAME is name for process. It is modified if necessary
2951 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2952 with the process. Process output goes at end of that buffer, unless
2953 you specify an output stream or filter function to handle the output.
2954 BUFFER may be also nil, meaning that this process is not associated
2957 :host HOST -- HOST is name of the host to connect to, or its IP
2958 address. The symbol `local' specifies the local host. If specified
2959 for a server process, it must be a valid name or address for the local
2960 host, and only clients connecting to that address will be accepted.
2962 :service SERVICE -- SERVICE is name of the service desired, or an
2963 integer specifying a port number to connect to. If SERVICE is t,
2964 a random port number is selected for the server. (If Emacs was
2965 compiled with getaddrinfo, a port number can also be specified as a
2966 string, e.g. "80", as well as an integer. This is not portable.)
2968 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2969 stream type connection, `datagram' creates a datagram type connection,
2970 `seqpacket' creates a reliable datagram connection.
2972 :family FAMILY -- FAMILY is the address (and protocol) family for the
2973 service specified by HOST and SERVICE. The default (nil) is to use
2974 whatever address family (IPv4 or IPv6) that is defined for the host
2975 and port number specified by HOST and SERVICE. Other address families
2977 local -- for a local (i.e. UNIX) address specified by SERVICE.
2978 ipv4 -- use IPv4 address family only.
2979 ipv6 -- use IPv6 address family only.
2981 :local ADDRESS -- ADDRESS is the local address used for the connection.
2982 This parameter is ignored when opening a client process. When specified
2983 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2985 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2986 connection. This parameter is ignored when opening a stream server
2987 process. For a datagram server process, it specifies the initial
2988 setting of the remote datagram address. When specified for a client
2989 process, the FAMILY, HOST, and SERVICE args are ignored.
2991 The format of ADDRESS depends on the address family:
2992 - An IPv4 address is represented as an vector of integers [A B C D P]
2993 corresponding to numeric IP address A.B.C.D and port number P.
2994 - A local address is represented as a string with the address in the
2995 local address space.
2996 - An "unsupported family" address is represented by a cons (F . AV)
2997 where F is the family number and AV is a vector containing the socket
2998 address data with one element per address data byte. Do not rely on
2999 this format in portable code, as it may depend on implementation
3000 defined constants, data sizes, and data structure alignment.
3002 :coding CODING -- If CODING is a symbol, it specifies the coding
3003 system used for both reading and writing for this process. If CODING
3004 is a cons (DECODING . ENCODING), DECODING is used for reading, and
3005 ENCODING is used for writing.
3007 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
3008 return without waiting for the connection to complete; instead, the
3009 sentinel function will be called with second arg matching "open" (if
3010 successful) or "failed" when the connect completes. Default is to use
3011 a blocking connect (i.e. wait) for stream type connections.
3013 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
3014 running when Emacs is exited.
3016 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
3017 In the stopped state, a server process does not accept new
3018 connections, and a client process does not handle incoming traffic.
3019 The stopped state is cleared by `continue-process' and set by
3022 :filter FILTER -- Install FILTER as the process filter.
3024 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
3025 process filter are multibyte, otherwise they are unibyte.
3026 If this keyword is not specified, the strings are multibyte if
3027 `default-enable-multibyte-characters' is non-nil.
3029 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
3031 :log LOG -- Install LOG as the server process log function. This
3032 function is called when the server accepts a network connection from a
3033 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
3034 is the server process, CLIENT is the new process for the connection,
3035 and MESSAGE is a string.
3037 :plist PLIST -- Install PLIST as the new process' initial plist.
3039 :server QLEN -- if QLEN is non-nil, create a server process for the
3040 specified FAMILY, SERVICE, and connection type (stream or datagram).
3041 If QLEN is an integer, it is used as the max. length of the server's
3042 pending connection queue (also known as the backlog); the default
3043 queue length is 5. Default is to create a client process.
3045 The following network options can be specified for this connection:
3047 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
3048 :dontroute BOOL -- Only send to directly connected hosts.
3049 :keepalive BOOL -- Send keep-alive messages on network stream.
3050 :linger BOOL or TIMEOUT -- Send queued messages before closing.
3051 :oobinline BOOL -- Place out-of-band data in receive data stream.
3052 :priority INT -- Set protocol defined priority for sent packets.
3053 :reuseaddr BOOL -- Allow reusing a recently used local address
3054 (this is allowed by default for a server process).
3055 :bindtodevice NAME -- bind to interface NAME. Using this may require
3056 special privileges on some systems.
3058 Consult the relevant system programmer's manual pages for more
3059 information on using these options.
3062 A server process will listen for and accept connections from clients.
3063 When a client connection is accepted, a new network process is created
3064 for the connection with the following parameters:
3066 - The client's process name is constructed by concatenating the server
3067 process' NAME and a client identification string.
3068 - If the FILTER argument is non-nil, the client process will not get a
3069 separate process buffer; otherwise, the client's process buffer is a newly
3070 created buffer named after the server process' BUFFER name or process
3071 NAME concatenated with the client identification string.
3072 - The connection type and the process filter and sentinel parameters are
3073 inherited from the server process' TYPE, FILTER and SENTINEL.
3074 - The client process' contact info is set according to the client's
3075 addressing information (typically an IP address and a port number).
3076 - The client process' plist is initialized from the server's plist.
3078 Notice that the FILTER and SENTINEL args are never used directly by
3079 the server process. Also, the BUFFER argument is not used directly by
3080 the server process, but via the optional :log function, accepted (and
3081 failed) connections may be logged in the server process' buffer.
3083 The original argument list, modified with the actual connection
3084 information, is available via the `process-contact' function.
3086 usage: (make-network-process &rest ARGS) */)
3087 (int nargs
, Lisp_Object
*args
)
3090 Lisp_Object contact
;
3091 struct Lisp_Process
*p
;
3092 #ifdef HAVE_GETADDRINFO
3093 struct addrinfo ai
, *res
, *lres
;
3094 struct addrinfo hints
;
3095 const char *portstring
;
3097 #else /* HAVE_GETADDRINFO */
3098 struct _emacs_addrinfo
3104 struct sockaddr
*ai_addr
;
3105 struct _emacs_addrinfo
*ai_next
;
3107 #endif /* HAVE_GETADDRINFO */
3108 struct sockaddr_in address_in
;
3109 #ifdef HAVE_LOCAL_SOCKETS
3110 struct sockaddr_un address_un
;
3115 int s
= -1, outch
, inch
;
3116 struct gcpro gcpro1
;
3117 int count
= SPECPDL_INDEX ();
3119 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
3121 Lisp_Object name
, buffer
, host
, service
, address
;
3122 Lisp_Object filter
, sentinel
;
3123 int is_non_blocking_client
= 0;
3124 int is_server
= 0, backlog
= 5;
3131 /* Save arguments for process-contact and clone-process. */
3132 contact
= Flist (nargs
, args
);
3136 /* Ensure socket support is loaded if available. */
3137 init_winsock (TRUE
);
3140 /* :type TYPE (nil: stream, datagram */
3141 tem
= Fplist_get (contact
, QCtype
);
3143 socktype
= SOCK_STREAM
;
3144 #ifdef DATAGRAM_SOCKETS
3145 else if (EQ (tem
, Qdatagram
))
3146 socktype
= SOCK_DGRAM
;
3148 #ifdef HAVE_SEQPACKET
3149 else if (EQ (tem
, Qseqpacket
))
3150 socktype
= SOCK_SEQPACKET
;
3153 error ("Unsupported connection type");
3156 tem
= Fplist_get (contact
, QCserver
);
3159 /* Don't support network sockets when non-blocking mode is
3160 not available, since a blocked Emacs is not useful. */
3161 #if !defined(O_NONBLOCK) && !defined(O_NDELAY)
3162 error ("Network servers not supported");
3166 backlog
= XINT (tem
);
3170 /* Make QCaddress an alias for :local (server) or :remote (client). */
3171 QCaddress
= is_server
? QClocal
: QCremote
;
3174 if (!is_server
&& socktype
!= SOCK_DGRAM
3175 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
3177 #ifndef NON_BLOCKING_CONNECT
3178 error ("Non-blocking connect not supported");
3180 is_non_blocking_client
= 1;
3184 name
= Fplist_get (contact
, QCname
);
3185 buffer
= Fplist_get (contact
, QCbuffer
);
3186 filter
= Fplist_get (contact
, QCfilter
);
3187 sentinel
= Fplist_get (contact
, QCsentinel
);
3189 CHECK_STRING (name
);
3191 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
3192 ai
.ai_socktype
= socktype
;
3197 /* :local ADDRESS or :remote ADDRESS */
3198 address
= Fplist_get (contact
, QCaddress
);
3199 if (!NILP (address
))
3201 host
= service
= Qnil
;
3203 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
3204 error ("Malformed :address");
3205 ai
.ai_family
= family
;
3206 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
3207 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
3211 /* :family FAMILY -- nil (for Inet), local, or integer. */
3212 tem
= Fplist_get (contact
, QCfamily
);
3215 #if defined(HAVE_GETADDRINFO) && defined(AF_INET6)
3221 #ifdef HAVE_LOCAL_SOCKETS
3222 else if (EQ (tem
, Qlocal
))
3226 else if (EQ (tem
, Qipv6
))
3229 else if (EQ (tem
, Qipv4
))
3231 else if (INTEGERP (tem
))
3232 family
= XINT (tem
);
3234 error ("Unknown address family");
3236 ai
.ai_family
= family
;
3238 /* :service SERVICE -- string, integer (port number), or t (random port). */
3239 service
= Fplist_get (contact
, QCservice
);
3241 /* :host HOST -- hostname, ip address, or 'local for localhost. */
3242 host
= Fplist_get (contact
, QChost
);
3245 if (EQ (host
, Qlocal
))
3246 /* Depending on setup, "localhost" may map to different IPv4 and/or
3247 IPv6 addresses, so it's better to be explicit. (Bug#6781) */
3248 host
= build_string ("127.0.0.1");
3249 CHECK_STRING (host
);
3252 #ifdef HAVE_LOCAL_SOCKETS
3253 if (family
== AF_LOCAL
)
3257 message (":family local ignores the :host \"%s\" property",
3259 contact
= Fplist_put (contact
, QChost
, Qnil
);
3262 CHECK_STRING (service
);
3263 memset (&address_un
, 0, sizeof address_un
);
3264 address_un
.sun_family
= AF_LOCAL
;
3265 strncpy (address_un
.sun_path
, SSDATA (service
), sizeof address_un
.sun_path
);
3266 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
3267 ai
.ai_addrlen
= sizeof address_un
;
3272 /* Slow down polling to every ten seconds.
3273 Some kernels have a bug which causes retrying connect to fail
3274 after a connect. Polling can interfere with gethostbyname too. */
3275 #ifdef POLL_FOR_INPUT
3276 if (socktype
!= SOCK_DGRAM
)
3278 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
3279 bind_polling_period (10);
3283 #ifdef HAVE_GETADDRINFO
3284 /* If we have a host, use getaddrinfo to resolve both host and service.
3285 Otherwise, use getservbyname to lookup the service. */
3289 /* SERVICE can either be a string or int.
3290 Convert to a C string for later use by getaddrinfo. */
3291 if (EQ (service
, Qt
))
3293 else if (INTEGERP (service
))
3295 sprintf (portbuf
, "%ld", (long) XINT (service
));
3296 portstring
= portbuf
;
3300 CHECK_STRING (service
);
3301 portstring
= SSDATA (service
);
3306 memset (&hints
, 0, sizeof (hints
));
3308 hints
.ai_family
= family
;
3309 hints
.ai_socktype
= socktype
;
3310 hints
.ai_protocol
= 0;
3312 #ifdef HAVE_RES_INIT
3316 ret
= getaddrinfo (SSDATA (host
), portstring
, &hints
, &res
);
3318 #ifdef HAVE_GAI_STRERROR
3319 error ("%s/%s %s", SSDATA (host
), portstring
, gai_strerror (ret
));
3321 error ("%s/%s getaddrinfo error %d", SSDATA (host
), portstring
, ret
);
3327 #endif /* HAVE_GETADDRINFO */
3329 /* We end up here if getaddrinfo is not defined, or in case no hostname
3330 has been specified (e.g. for a local server process). */
3332 if (EQ (service
, Qt
))
3334 else if (INTEGERP (service
))
3335 port
= htons ((unsigned short) XINT (service
));
3338 struct servent
*svc_info
;
3339 CHECK_STRING (service
);
3340 svc_info
= getservbyname (SSDATA (service
),
3341 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3343 error ("Unknown service: %s", SDATA (service
));
3344 port
= svc_info
->s_port
;
3347 memset (&address_in
, 0, sizeof address_in
);
3348 address_in
.sin_family
= family
;
3349 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3350 address_in
.sin_port
= port
;
3352 #ifndef HAVE_GETADDRINFO
3355 struct hostent
*host_info_ptr
;
3357 /* gethostbyname may fail with TRY_AGAIN, but we don't honour that,
3358 as it may `hang' Emacs for a very long time. */
3362 #ifdef HAVE_RES_INIT
3366 host_info_ptr
= gethostbyname (SDATA (host
));
3371 memcpy (&address_in
.sin_addr
, host_info_ptr
->h_addr
,
3372 host_info_ptr
->h_length
);
3373 family
= host_info_ptr
->h_addrtype
;
3374 address_in
.sin_family
= family
;
3377 /* Attempt to interpret host as numeric inet address */
3379 unsigned long numeric_addr
;
3380 numeric_addr
= inet_addr (SSDATA (host
));
3381 if (numeric_addr
== -1)
3382 error ("Unknown host \"%s\"", SDATA (host
));
3384 memcpy (&address_in
.sin_addr
, &numeric_addr
,
3385 sizeof (address_in
.sin_addr
));
3389 #endif /* not HAVE_GETADDRINFO */
3391 ai
.ai_family
= family
;
3392 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3393 ai
.ai_addrlen
= sizeof address_in
;
3397 /* Do this in case we never enter the for-loop below. */
3398 count1
= SPECPDL_INDEX ();
3401 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3407 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3414 #ifdef DATAGRAM_SOCKETS
3415 if (!is_server
&& socktype
== SOCK_DGRAM
)
3417 #endif /* DATAGRAM_SOCKETS */
3419 #ifdef NON_BLOCKING_CONNECT
3420 if (is_non_blocking_client
)
3423 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3425 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3437 /* Make us close S if quit. */
3438 record_unwind_protect (close_file_unwind
, make_number (s
));
3440 /* Parse network options in the arg list.
3441 We simply ignore anything which isn't a known option (including other keywords).
3442 An error is signaled if setting a known option fails. */
3443 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3444 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3448 /* Configure as a server socket. */
3450 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3451 explicit :reuseaddr key to override this. */
3452 #ifdef HAVE_LOCAL_SOCKETS
3453 if (family
!= AF_LOCAL
)
3455 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3458 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3459 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3462 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3463 report_file_error ("Cannot bind server socket", Qnil
);
3465 #ifdef HAVE_GETSOCKNAME
3466 if (EQ (service
, Qt
))
3468 struct sockaddr_in sa1
;
3469 int len1
= sizeof (sa1
);
3470 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3472 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3473 service
= make_number (ntohs (sa1
.sin_port
));
3474 contact
= Fplist_put (contact
, QCservice
, service
);
3479 if (socktype
!= SOCK_DGRAM
&& listen (s
, backlog
))
3480 report_file_error ("Cannot listen on server socket", Qnil
);
3488 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3491 if (ret
== 0 || xerrno
== EISCONN
)
3493 /* The unwind-protect will be discarded afterwards.
3494 Likewise for immediate_quit. */
3498 #ifdef NON_BLOCKING_CONNECT
3500 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3504 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3511 if (xerrno
== EINTR
)
3513 /* Unlike most other syscalls connect() cannot be called
3514 again. (That would return EALREADY.) The proper way to
3515 wait for completion is select(). */
3522 sc
= select (s
+ 1, (SELECT_TYPE
*)0, &fdset
, (SELECT_TYPE
*)0,
3529 report_file_error ("select failed", Qnil
);
3533 len
= sizeof xerrno
;
3534 eassert (FD_ISSET (s
, &fdset
));
3535 if (getsockopt (s
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &len
) == -1)
3536 report_file_error ("getsockopt failed", Qnil
);
3538 errno
= xerrno
, report_file_error ("error during connect", Qnil
);
3542 #endif /* !WINDOWSNT */
3546 /* Discard the unwind protect closing S. */
3547 specpdl_ptr
= specpdl
+ count1
;
3552 if (xerrno
== EINTR
)
3559 #ifdef DATAGRAM_SOCKETS
3560 if (socktype
== SOCK_DGRAM
)
3562 if (datagram_address
[s
].sa
)
3564 datagram_address
[s
].sa
= (struct sockaddr
*) xmalloc (lres
->ai_addrlen
);
3565 datagram_address
[s
].len
= lres
->ai_addrlen
;
3569 memset (datagram_address
[s
].sa
, 0, lres
->ai_addrlen
);
3570 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3573 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3574 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3575 conv_lisp_to_sockaddr (rfamily
, remote
,
3576 datagram_address
[s
].sa
, rlen
);
3580 memcpy (datagram_address
[s
].sa
, lres
->ai_addr
, lres
->ai_addrlen
);
3583 contact
= Fplist_put (contact
, QCaddress
,
3584 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3585 #ifdef HAVE_GETSOCKNAME
3588 struct sockaddr_in sa1
;
3589 int len1
= sizeof (sa1
);
3590 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3591 contact
= Fplist_put (contact
, QClocal
,
3592 conv_sockaddr_to_lisp ((struct sockaddr
*)&sa1
, len1
));
3599 #ifdef HAVE_GETADDRINFO
3608 /* Discard the unwind protect for closing S, if any. */
3609 specpdl_ptr
= specpdl
+ count1
;
3611 /* Unwind bind_polling_period and request_sigio. */
3612 unbind_to (count
, Qnil
);
3616 /* If non-blocking got this far - and failed - assume non-blocking is
3617 not supported after all. This is probably a wrong assumption, but
3618 the normal blocking calls to open-network-stream handles this error
3620 if (is_non_blocking_client
)
3625 report_file_error ("make server process failed", contact
);
3627 report_file_error ("make client process failed", contact
);
3634 buffer
= Fget_buffer_create (buffer
);
3635 proc
= make_process (name
);
3637 chan_process
[inch
] = proc
;
3640 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3643 fcntl (inch
, F_SETFL
, O_NDELAY
);
3647 p
= XPROCESS (proc
);
3649 p
->childp
= contact
;
3650 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
3654 p
->sentinel
= sentinel
;
3656 p
->log
= Fplist_get (contact
, QClog
);
3657 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3658 p
->kill_without_query
= 1;
3659 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3664 if (is_server
&& socktype
!= SOCK_DGRAM
)
3665 p
->status
= Qlisten
;
3667 /* Make the process marker point into the process buffer (if any). */
3668 if (BUFFERP (buffer
))
3669 set_marker_both (p
->mark
, buffer
,
3670 BUF_ZV (XBUFFER (buffer
)),
3671 BUF_ZV_BYTE (XBUFFER (buffer
)));
3673 #ifdef NON_BLOCKING_CONNECT
3674 if (is_non_blocking_client
)
3676 /* We may get here if connect did succeed immediately. However,
3677 in that case, we still need to signal this like a non-blocking
3679 p
->status
= Qconnect
;
3680 if (!FD_ISSET (inch
, &connect_wait_mask
))
3682 FD_SET (inch
, &connect_wait_mask
);
3683 FD_SET (inch
, &write_mask
);
3684 num_pending_connects
++;
3689 /* A server may have a client filter setting of Qt, but it must
3690 still listen for incoming connects unless it is stopped. */
3691 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3692 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3694 FD_SET (inch
, &input_wait_mask
);
3695 FD_SET (inch
, &non_keyboard_wait_mask
);
3698 if (inch
> max_process_desc
)
3699 max_process_desc
= inch
;
3701 tem
= Fplist_member (contact
, QCcoding
);
3702 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3703 tem
= Qnil
; /* No error message (too late!). */
3706 /* Setup coding systems for communicating with the network stream. */
3707 struct gcpro gcpro1
;
3708 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3709 Lisp_Object coding_systems
= Qt
;
3710 Lisp_Object args
[5], val
;
3714 val
= XCAR (XCDR (tem
));
3718 else if (!NILP (Vcoding_system_for_read
))
3719 val
= Vcoding_system_for_read
;
3720 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
3721 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
3722 /* We dare not decode end-of-line format by setting VAL to
3723 Qraw_text, because the existing Emacs Lisp libraries
3724 assume that they receive bare code including a sequene of
3729 if (NILP (host
) || NILP (service
))
3730 coding_systems
= Qnil
;
3733 args
[0] = Qopen_network_stream
, args
[1] = name
,
3734 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3736 coding_systems
= Ffind_operation_coding_system (5, args
);
3739 if (CONSP (coding_systems
))
3740 val
= XCAR (coding_systems
);
3741 else if (CONSP (Vdefault_process_coding_system
))
3742 val
= XCAR (Vdefault_process_coding_system
);
3746 p
->decode_coding_system
= val
;
3750 val
= XCAR (XCDR (tem
));
3754 else if (!NILP (Vcoding_system_for_write
))
3755 val
= Vcoding_system_for_write
;
3756 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3760 if (EQ (coding_systems
, Qt
))
3762 if (NILP (host
) || NILP (service
))
3763 coding_systems
= Qnil
;
3766 args
[0] = Qopen_network_stream
, args
[1] = name
,
3767 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3769 coding_systems
= Ffind_operation_coding_system (5, args
);
3773 if (CONSP (coding_systems
))
3774 val
= XCDR (coding_systems
);
3775 else if (CONSP (Vdefault_process_coding_system
))
3776 val
= XCDR (Vdefault_process_coding_system
);
3780 p
->encode_coding_system
= val
;
3782 setup_process_coding_systems (proc
);
3784 p
->decoding_buf
= empty_unibyte_string
;
3785 p
->decoding_carryover
= 0;
3786 p
->encoding_buf
= empty_unibyte_string
;
3788 p
->inherit_coding_system_flag
3789 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3796 #if defined(HAVE_NET_IF_H)
3799 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3800 doc
: /* Return an alist of all network interfaces and their network address.
3801 Each element is a cons, the car of which is a string containing the
3802 interface name, and the cdr is the network address in internal
3803 format; see the description of ADDRESS in `make-network-process'. */)
3806 struct ifconf ifconf
;
3807 struct ifreq
*ifreqs
= NULL
;
3812 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3818 buf_size
= ifaces
* sizeof (ifreqs
[0]);
3819 ifreqs
= (struct ifreq
*)xrealloc(ifreqs
, buf_size
);
3826 ifconf
.ifc_len
= buf_size
;
3827 ifconf
.ifc_req
= ifreqs
;
3828 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3834 if (ifconf
.ifc_len
== buf_size
)
3838 ifaces
= ifconf
.ifc_len
/ sizeof (ifreqs
[0]);
3841 while (--ifaces
>= 0)
3843 struct ifreq
*ifq
= &ifreqs
[ifaces
];
3844 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3845 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3847 memcpy (namebuf
, ifq
->ifr_name
, sizeof (ifq
->ifr_name
));
3848 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3849 res
= Fcons (Fcons (build_string (namebuf
),
3850 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3851 sizeof (struct sockaddr
))),
3857 #endif /* SIOCGIFCONF */
3859 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
3863 const char *flag_sym
;
3866 static const struct ifflag_def ifflag_table
[] = {
3870 #ifdef IFF_BROADCAST
3871 { IFF_BROADCAST
, "broadcast" },
3874 { IFF_DEBUG
, "debug" },
3877 { IFF_LOOPBACK
, "loopback" },
3879 #ifdef IFF_POINTOPOINT
3880 { IFF_POINTOPOINT
, "pointopoint" },
3883 { IFF_RUNNING
, "running" },
3886 { IFF_NOARP
, "noarp" },
3889 { IFF_PROMISC
, "promisc" },
3891 #ifdef IFF_NOTRAILERS
3892 { IFF_NOTRAILERS
, "notrailers" },
3895 { IFF_ALLMULTI
, "allmulti" },
3898 { IFF_MASTER
, "master" },
3901 { IFF_SLAVE
, "slave" },
3903 #ifdef IFF_MULTICAST
3904 { IFF_MULTICAST
, "multicast" },
3907 { IFF_PORTSEL
, "portsel" },
3909 #ifdef IFF_AUTOMEDIA
3910 { IFF_AUTOMEDIA
, "automedia" },
3913 { IFF_DYNAMIC
, "dynamic" },
3916 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3919 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3922 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3925 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3928 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3933 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3934 doc
: /* Return information about network interface named IFNAME.
3935 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3936 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3937 NETMASK is the layer 3 network mask, HWADDR is the layer 2 addres, and
3938 FLAGS is the current flags of the interface. */)
3939 (Lisp_Object ifname
)
3942 Lisp_Object res
= Qnil
;
3947 CHECK_STRING (ifname
);
3949 memset (rq
.ifr_name
, 0, sizeof rq
.ifr_name
);
3950 strncpy (rq
.ifr_name
, SDATA (ifname
), sizeof (rq
.ifr_name
));
3952 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3957 #if defined(SIOCGIFFLAGS) && defined(HAVE_STRUCT_IFREQ_IFR_FLAGS)
3958 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3960 int flags
= rq
.ifr_flags
;
3961 const struct ifflag_def
*fp
;
3965 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3967 if (flags
& fp
->flag_bit
)
3969 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3970 flags
-= fp
->flag_bit
;
3973 for (fnum
= 0; flags
&& fnum
< 32; fnum
++)
3975 if (flags
& (1 << fnum
))
3977 elt
= Fcons (make_number (fnum
), elt
);
3982 res
= Fcons (elt
, res
);
3985 #if defined(SIOCGIFHWADDR) && defined(HAVE_STRUCT_IFREQ_IFR_HWADDR)
3986 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3988 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3989 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3993 for (n
= 0; n
< 6; n
++)
3994 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3995 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3998 res
= Fcons (elt
, res
);
4001 #if defined(SIOCGIFNETMASK) && (defined(HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined(HAVE_STRUCT_IFREQ_IFR_ADDR))
4002 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
4005 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
4006 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
4008 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
4012 res
= Fcons (elt
, res
);
4015 #if defined(SIOCGIFBRDADDR) && defined(HAVE_STRUCT_IFREQ_IFR_BROADADDR)
4016 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
4019 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
4022 res
= Fcons (elt
, res
);
4025 #if defined(SIOCGIFADDR) && defined(HAVE_STRUCT_IFREQ_IFR_ADDR)
4026 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
4029 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
4032 res
= Fcons (elt
, res
);
4036 return any
? res
: Qnil
;
4039 #endif /* defined(HAVE_NET_IF_H) */
4041 /* Turn off input and output for process PROC. */
4044 deactivate_process (Lisp_Object proc
)
4046 register int inchannel
, outchannel
;
4047 register struct Lisp_Process
*p
= XPROCESS (proc
);
4049 inchannel
= p
->infd
;
4050 outchannel
= p
->outfd
;
4052 #ifdef ADAPTIVE_READ_BUFFERING
4053 if (p
->read_output_delay
> 0)
4055 if (--process_output_delay_count
< 0)
4056 process_output_delay_count
= 0;
4057 p
->read_output_delay
= 0;
4058 p
->read_output_skip
= 0;
4064 /* Beware SIGCHLD hereabouts. */
4065 flush_pending_output (inchannel
);
4066 emacs_close (inchannel
);
4067 if (outchannel
>= 0 && outchannel
!= inchannel
)
4068 emacs_close (outchannel
);
4072 #ifdef DATAGRAM_SOCKETS
4073 if (DATAGRAM_CHAN_P (inchannel
))
4075 xfree (datagram_address
[inchannel
].sa
);
4076 datagram_address
[inchannel
].sa
= 0;
4077 datagram_address
[inchannel
].len
= 0;
4080 chan_process
[inchannel
] = Qnil
;
4081 FD_CLR (inchannel
, &input_wait_mask
);
4082 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
4083 #ifdef NON_BLOCKING_CONNECT
4084 if (FD_ISSET (inchannel
, &connect_wait_mask
))
4086 FD_CLR (inchannel
, &connect_wait_mask
);
4087 FD_CLR (inchannel
, &write_mask
);
4088 if (--num_pending_connects
< 0)
4092 if (inchannel
== max_process_desc
)
4095 /* We just closed the highest-numbered process input descriptor,
4096 so recompute the highest-numbered one now. */
4097 max_process_desc
= 0;
4098 for (i
= 0; i
< MAXDESC
; i
++)
4099 if (!NILP (chan_process
[i
]))
4100 max_process_desc
= i
;
4106 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
4108 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
4109 It is read into the process' buffers or given to their filter functions.
4110 Non-nil arg PROCESS means do not return until some output has been received
4113 Non-nil second arg SECONDS and third arg MILLISEC are number of seconds
4114 and milliseconds to wait; return after that much time whether or not
4115 there is any subprocess output. If SECONDS is a floating point number,
4116 it specifies a fractional number of seconds to wait.
4117 The MILLISEC argument is obsolete and should be avoided.
4119 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
4120 from PROCESS, suspending reading output from other processes.
4121 If JUST-THIS-ONE is an integer, don't run any timers either.
4122 Return non-nil if we received any output before the timeout expired. */)
4123 (register Lisp_Object process
, Lisp_Object seconds
, Lisp_Object millisec
, Lisp_Object just_this_one
)
4125 int secs
, usecs
= 0;
4127 if (! NILP (process
))
4128 CHECK_PROCESS (process
);
4130 just_this_one
= Qnil
;
4132 if (!NILP (millisec
))
4133 { /* Obsolete calling convention using integers rather than floats. */
4134 CHECK_NUMBER (millisec
);
4136 seconds
= make_float (XINT (millisec
) / 1000.0);
4139 CHECK_NUMBER (seconds
);
4140 seconds
= make_float (XINT (millisec
) / 1000.0 + XINT (seconds
));
4144 if (!NILP (seconds
))
4146 if (INTEGERP (seconds
))
4147 secs
= XINT (seconds
);
4148 else if (FLOATP (seconds
))
4150 double timeout
= XFLOAT_DATA (seconds
);
4151 secs
= (int) timeout
;
4152 usecs
= (int) ((timeout
- (double) secs
) * 1000000);
4155 wrong_type_argument (Qnumberp
, seconds
);
4157 if (secs
< 0 || (secs
== 0 && usecs
== 0))
4158 secs
= -1, usecs
= 0;
4161 secs
= NILP (process
) ? -1 : 0;
4164 (wait_reading_process_output (secs
, usecs
, 0, 0,
4166 !NILP (process
) ? XPROCESS (process
) : NULL
,
4167 NILP (just_this_one
) ? 0 :
4168 !INTEGERP (just_this_one
) ? 1 : -1)
4172 /* Accept a connection for server process SERVER on CHANNEL. */
4174 static int connect_counter
= 0;
4177 server_accept_connection (Lisp_Object server
, int channel
)
4179 Lisp_Object proc
, caller
, name
, buffer
;
4180 Lisp_Object contact
, host
, service
;
4181 struct Lisp_Process
*ps
= XPROCESS (server
);
4182 struct Lisp_Process
*p
;
4186 struct sockaddr_in in
;
4188 struct sockaddr_in6 in6
;
4190 #ifdef HAVE_LOCAL_SOCKETS
4191 struct sockaddr_un un
;
4194 int len
= sizeof saddr
;
4196 s
= accept (channel
, &saddr
.sa
, &len
);
4205 if (code
== EWOULDBLOCK
)
4209 if (!NILP (ps
->log
))
4210 call3 (ps
->log
, server
, Qnil
,
4211 concat3 (build_string ("accept failed with code"),
4212 Fnumber_to_string (make_number (code
)),
4213 build_string ("\n")));
4219 /* Setup a new process to handle the connection. */
4221 /* Generate a unique identification of the caller, and build contact
4222 information for this process. */
4225 switch (saddr
.sa
.sa_family
)
4229 Lisp_Object args
[5];
4230 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4231 args
[0] = build_string ("%d.%d.%d.%d");
4232 args
[1] = make_number (*ip
++);
4233 args
[2] = make_number (*ip
++);
4234 args
[3] = make_number (*ip
++);
4235 args
[4] = make_number (*ip
++);
4236 host
= Fformat (5, args
);
4237 service
= make_number (ntohs (saddr
.in
.sin_port
));
4239 args
[0] = build_string (" <%s:%d>");
4242 caller
= Fformat (3, args
);
4249 Lisp_Object args
[9];
4250 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4252 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4253 for (i
= 0; i
< 8; i
++)
4254 args
[i
+1] = make_number (ntohs (ip6
[i
]));
4255 host
= Fformat (9, args
);
4256 service
= make_number (ntohs (saddr
.in
.sin_port
));
4258 args
[0] = build_string (" <[%s]:%d>");
4261 caller
= Fformat (3, args
);
4266 #ifdef HAVE_LOCAL_SOCKETS
4270 caller
= Fnumber_to_string (make_number (connect_counter
));
4271 caller
= concat3 (build_string (" <"), caller
, build_string (">"));
4275 /* Create a new buffer name for this process if it doesn't have a
4276 filter. The new buffer name is based on the buffer name or
4277 process name of the server process concatenated with the caller
4280 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4284 buffer
= ps
->buffer
;
4286 buffer
= Fbuffer_name (buffer
);
4291 buffer
= concat2 (buffer
, caller
);
4292 buffer
= Fget_buffer_create (buffer
);
4296 /* Generate a unique name for the new server process. Combine the
4297 server process name with the caller identification. */
4299 name
= concat2 (ps
->name
, caller
);
4300 proc
= make_process (name
);
4302 chan_process
[s
] = proc
;
4305 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4308 fcntl (s
, F_SETFL
, O_NDELAY
);
4312 p
= XPROCESS (proc
);
4314 /* Build new contact information for this setup. */
4315 contact
= Fcopy_sequence (ps
->childp
);
4316 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4317 contact
= Fplist_put (contact
, QChost
, host
);
4318 if (!NILP (service
))
4319 contact
= Fplist_put (contact
, QCservice
, service
);
4320 contact
= Fplist_put (contact
, QCremote
,
4321 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4322 #ifdef HAVE_GETSOCKNAME
4324 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4325 contact
= Fplist_put (contact
, QClocal
,
4326 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4329 p
->childp
= contact
;
4330 p
->plist
= Fcopy_sequence (ps
->plist
);
4334 p
->sentinel
= ps
->sentinel
;
4335 p
->filter
= ps
->filter
;
4342 /* Client processes for accepted connections are not stopped initially. */
4343 if (!EQ (p
->filter
, Qt
))
4345 FD_SET (s
, &input_wait_mask
);
4346 FD_SET (s
, &non_keyboard_wait_mask
);
4349 if (s
> max_process_desc
)
4350 max_process_desc
= s
;
4352 /* Setup coding system for new process based on server process.
4353 This seems to be the proper thing to do, as the coding system
4354 of the new process should reflect the settings at the time the
4355 server socket was opened; not the current settings. */
4357 p
->decode_coding_system
= ps
->decode_coding_system
;
4358 p
->encode_coding_system
= ps
->encode_coding_system
;
4359 setup_process_coding_systems (proc
);
4361 p
->decoding_buf
= empty_unibyte_string
;
4362 p
->decoding_carryover
= 0;
4363 p
->encoding_buf
= empty_unibyte_string
;
4365 p
->inherit_coding_system_flag
4366 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4368 if (!NILP (ps
->log
))
4369 call3 (ps
->log
, server
, proc
,
4370 concat3 (build_string ("accept from "),
4371 (STRINGP (host
) ? host
: build_string ("-")),
4372 build_string ("\n")));
4374 if (!NILP (p
->sentinel
))
4375 exec_sentinel (proc
,
4376 concat3 (build_string ("open from "),
4377 (STRINGP (host
) ? host
: build_string ("-")),
4378 build_string ("\n")));
4381 /* This variable is different from waiting_for_input in keyboard.c.
4382 It is used to communicate to a lisp process-filter/sentinel (via the
4383 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4384 for user-input when that process-filter was called.
4385 waiting_for_input cannot be used as that is by definition 0 when
4386 lisp code is being evalled.
4387 This is also used in record_asynch_buffer_change.
4388 For that purpose, this must be 0
4389 when not inside wait_reading_process_output. */
4390 static int waiting_for_user_input_p
;
4393 wait_reading_process_output_unwind (Lisp_Object data
)
4395 waiting_for_user_input_p
= XINT (data
);
4399 /* This is here so breakpoints can be put on it. */
4401 wait_reading_process_output_1 (void)
4405 /* Use a wrapper around select to work around a bug in gdb 5.3.
4406 Normally, the wrapper is optimized away by inlining.
4408 If emacs is stopped inside select, the gdb backtrace doesn't
4409 show the function which called select, so it is practically
4410 impossible to step through wait_reading_process_output. */
4414 select_wrapper (int n
, fd_set
*rfd
, fd_set
*wfd
, fd_set
*xfd
, struct timeval
*tmo
)
4416 return select (n
, rfd
, wfd
, xfd
, tmo
);
4418 #define select select_wrapper
4421 /* Read and dispose of subprocess output while waiting for timeout to
4422 elapse and/or keyboard input to be available.
4425 timeout in seconds, or
4426 zero for no limit, or
4427 -1 means gobble data immediately available but don't wait for any.
4430 an additional duration to wait, measured in microseconds.
4431 If this is nonzero and time_limit is 0, then the timeout
4432 consists of MICROSECS only.
4434 READ_KBD is a lisp value:
4435 0 to ignore keyboard input, or
4436 1 to return when input is available, or
4437 -1 meaning caller will actually read the input, so don't throw to
4438 the quit handler, or
4440 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4441 output that arrives.
4443 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4444 (and gobble terminal input into the buffer if any arrives).
4446 If WAIT_PROC is specified, wait until something arrives from that
4447 process. The return value is true if we read some input from
4450 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4451 (suspending output from other processes). A negative value
4452 means don't run any timers either.
4454 If WAIT_PROC is specified, then the function returns true if we
4455 received input from that process before the timeout elapsed.
4456 Otherwise, return true if we received input from any process. */
4459 wait_reading_process_output (int time_limit
, int microsecs
, int read_kbd
,
4461 Lisp_Object wait_for_cell
,
4462 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
4464 register int channel
, nfds
;
4465 SELECT_TYPE Available
;
4466 SELECT_TYPE Writeok
;
4468 int check_delay
, no_avail
;
4471 EMACS_TIME timeout
, end_time
;
4472 int wait_channel
= -1;
4473 int got_some_input
= 0;
4474 int count
= SPECPDL_INDEX ();
4476 FD_ZERO (&Available
);
4479 if (time_limit
== 0 && microsecs
== 0 && wait_proc
&& !NILP (Vinhibit_quit
)
4480 && !(CONSP (wait_proc
->status
) && EQ (XCAR (wait_proc
->status
), Qexit
)))
4481 message ("Blocking call to accept-process-output with quit inhibited!!");
4483 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4484 if (wait_proc
!= NULL
)
4485 wait_channel
= wait_proc
->infd
;
4487 record_unwind_protect (wait_reading_process_output_unwind
,
4488 make_number (waiting_for_user_input_p
));
4489 waiting_for_user_input_p
= read_kbd
;
4491 /* Since we may need to wait several times,
4492 compute the absolute time to return at. */
4493 if (time_limit
|| microsecs
)
4495 EMACS_GET_TIME (end_time
);
4496 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4497 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4502 int timeout_reduced_for_timers
= 0;
4504 /* If calling from keyboard input, do not quit
4505 since we want to return C-g as an input character.
4506 Otherwise, do pending quit if requested. */
4511 process_pending_signals ();
4514 /* Exit now if the cell we're waiting for became non-nil. */
4515 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4518 /* Compute time from now till when time limit is up */
4519 /* Exit if already run out */
4520 if (time_limit
== -1)
4522 /* -1 specified for timeout means
4523 gobble output available now
4524 but don't wait at all. */
4526 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4528 else if (time_limit
|| microsecs
)
4530 EMACS_GET_TIME (timeout
);
4531 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4532 if (EMACS_TIME_NEG_P (timeout
))
4537 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4540 /* Normally we run timers here.
4541 But not if wait_for_cell; in those cases,
4542 the wait is supposed to be short,
4543 and those callers cannot handle running arbitrary Lisp code here. */
4544 if (NILP (wait_for_cell
)
4545 && just_wait_proc
>= 0)
4547 EMACS_TIME timer_delay
;
4551 int old_timers_run
= timers_run
;
4552 struct buffer
*old_buffer
= current_buffer
;
4553 Lisp_Object old_window
= selected_window
;
4555 timer_delay
= timer_check (1);
4557 /* If a timer has run, this might have changed buffers
4558 an alike. Make read_key_sequence aware of that. */
4559 if (timers_run
!= old_timers_run
4560 && (old_buffer
!= current_buffer
4561 || !EQ (old_window
, selected_window
))
4562 && waiting_for_user_input_p
== -1)
4563 record_asynch_buffer_change ();
4565 if (timers_run
!= old_timers_run
&& do_display
)
4566 /* We must retry, since a timer may have requeued itself
4567 and that could alter the time_delay. */
4568 redisplay_preserve_echo_area (9);
4572 while (!detect_input_pending ());
4574 /* If there is unread keyboard input, also return. */
4576 && requeued_events_pending_p ())
4579 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4581 EMACS_TIME difference
;
4582 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4583 if (EMACS_TIME_NEG_P (difference
))
4585 timeout
= timer_delay
;
4586 timeout_reduced_for_timers
= 1;
4589 /* If time_limit is -1, we are not going to wait at all. */
4590 else if (time_limit
!= -1)
4592 /* This is so a breakpoint can be put here. */
4593 wait_reading_process_output_1 ();
4597 /* Cause C-g and alarm signals to take immediate action,
4598 and cause input available signals to zero out timeout.
4600 It is important that we do this before checking for process
4601 activity. If we get a SIGCHLD after the explicit checks for
4602 process activity, timeout is the only way we will know. */
4604 set_waiting_for_input (&timeout
);
4606 /* If status of something has changed, and no input is
4607 available, notify the user of the change right away. After
4608 this explicit check, we'll let the SIGCHLD handler zap
4609 timeout to get our attention. */
4610 if (update_tick
!= process_tick
)
4615 if (kbd_on_hold_p ())
4618 Atemp
= input_wait_mask
;
4621 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4622 if ((select (max (max_process_desc
, max_input_desc
) + 1,
4624 #ifdef NON_BLOCKING_CONNECT
4625 (num_pending_connects
> 0 ? &Ctemp
: (SELECT_TYPE
*)0),
4629 (SELECT_TYPE
*)0, &timeout
)
4632 /* It's okay for us to do this and then continue with
4633 the loop, since timeout has already been zeroed out. */
4634 clear_waiting_for_input ();
4635 status_notify (NULL
);
4636 if (do_display
) redisplay_preserve_echo_area (13);
4640 /* Don't wait for output from a non-running process. Just
4641 read whatever data has already been received. */
4642 if (wait_proc
&& wait_proc
->raw_status_new
)
4643 update_status (wait_proc
);
4645 && ! EQ (wait_proc
->status
, Qrun
)
4646 && ! EQ (wait_proc
->status
, Qconnect
))
4648 int nread
, total_nread
= 0;
4650 clear_waiting_for_input ();
4651 XSETPROCESS (proc
, wait_proc
);
4653 /* Read data from the process, until we exhaust it. */
4654 while (wait_proc
->infd
>= 0)
4656 nread
= read_process_output (proc
, wait_proc
->infd
);
4663 total_nread
+= nread
;
4667 else if (nread
== -1 && EIO
== errno
)
4671 else if (nread
== -1 && EAGAIN
== errno
)
4675 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4679 if (total_nread
> 0 && do_display
)
4680 redisplay_preserve_echo_area (10);
4685 /* Wait till there is something to do */
4687 if (wait_proc
&& just_wait_proc
)
4689 if (wait_proc
->infd
< 0) /* Terminated */
4691 FD_SET (wait_proc
->infd
, &Available
);
4695 else if (!NILP (wait_for_cell
))
4697 Available
= non_process_wait_mask
;
4704 Available
= non_keyboard_wait_mask
;
4706 Available
= input_wait_mask
;
4707 Writeok
= write_mask
;
4708 #ifdef SELECT_CANT_DO_WRITE_MASK
4713 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4716 /* If frame size has changed or the window is newly mapped,
4717 redisplay now, before we start to wait. There is a race
4718 condition here; if a SIGIO arrives between now and the select
4719 and indicates that a frame is trashed, the select may block
4720 displaying a trashed screen. */
4721 if (frame_garbaged
&& do_display
)
4723 clear_waiting_for_input ();
4724 redisplay_preserve_echo_area (11);
4726 set_waiting_for_input (&timeout
);
4730 if (read_kbd
&& detect_input_pending ())
4738 #ifdef ADAPTIVE_READ_BUFFERING
4739 /* Set the timeout for adaptive read buffering if any
4740 process has non-zero read_output_skip and non-zero
4741 read_output_delay, and we are not reading output for a
4742 specific wait_channel. It is not executed if
4743 Vprocess_adaptive_read_buffering is nil. */
4744 if (process_output_skip
&& check_delay
> 0)
4746 int usecs
= EMACS_USECS (timeout
);
4747 if (EMACS_SECS (timeout
) > 0 || usecs
> READ_OUTPUT_DELAY_MAX
)
4748 usecs
= READ_OUTPUT_DELAY_MAX
;
4749 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4751 proc
= chan_process
[channel
];
4754 /* Find minimum non-zero read_output_delay among the
4755 processes with non-zero read_output_skip. */
4756 if (XPROCESS (proc
)->read_output_delay
> 0)
4759 if (!XPROCESS (proc
)->read_output_skip
)
4761 FD_CLR (channel
, &Available
);
4762 XPROCESS (proc
)->read_output_skip
= 0;
4763 if (XPROCESS (proc
)->read_output_delay
< usecs
)
4764 usecs
= XPROCESS (proc
)->read_output_delay
;
4767 EMACS_SET_SECS_USECS (timeout
, 0, usecs
);
4768 process_output_skip
= 0;
4771 #if defined (USE_GTK) || defined (HAVE_GCONF)
4773 #elif defined (HAVE_NS)
4778 (max (max_process_desc
, max_input_desc
) + 1,
4780 (check_write
? &Writeok
: (SELECT_TYPE
*)0),
4781 (SELECT_TYPE
*)0, &timeout
);
4786 /* Make C-g and alarm signals set flags again */
4787 clear_waiting_for_input ();
4789 /* If we woke up due to SIGWINCH, actually change size now. */
4790 do_pending_window_change (0);
4792 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4793 /* We wanted the full specified time, so return now. */
4797 if (xerrno
== EINTR
)
4799 else if (xerrno
== EBADF
)
4802 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4803 the child's closure of the pts gives the parent a SIGHUP, and
4804 the ptc file descriptor is automatically closed,
4805 yielding EBADF here or at select() call above.
4806 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4807 in m/ibmrt-aix.h), and here we just ignore the select error.
4808 Cleanup occurs c/o status_notify after SIGCLD. */
4809 no_avail
= 1; /* Cannot depend on values returned */
4815 error ("select error: %s", emacs_strerror (xerrno
));
4820 FD_ZERO (&Available
);
4824 #if 0 /* When polling is used, interrupt_input is 0,
4825 so get_input_pending should read the input.
4826 So this should not be needed. */
4827 /* If we are using polling for input,
4828 and we see input available, make it get read now.
4829 Otherwise it might not actually get read for a second.
4830 And on hpux, since we turn off polling in wait_reading_process_output,
4831 it might never get read at all if we don't spend much time
4832 outside of wait_reading_process_output. */
4833 if (read_kbd
&& interrupt_input
4834 && keyboard_bit_set (&Available
)
4835 && input_polling_used ())
4836 kill (getpid (), SIGALRM
);
4839 /* Check for keyboard input */
4840 /* If there is any, return immediately
4841 to give it higher priority than subprocesses */
4845 int old_timers_run
= timers_run
;
4846 struct buffer
*old_buffer
= current_buffer
;
4847 Lisp_Object old_window
= selected_window
;
4850 if (detect_input_pending_run_timers (do_display
))
4852 swallow_events (do_display
);
4853 if (detect_input_pending_run_timers (do_display
))
4857 /* If a timer has run, this might have changed buffers
4858 an alike. Make read_key_sequence aware of that. */
4859 if (timers_run
!= old_timers_run
4860 && waiting_for_user_input_p
== -1
4861 && (old_buffer
!= current_buffer
4862 || !EQ (old_window
, selected_window
)))
4863 record_asynch_buffer_change ();
4869 /* If there is unread keyboard input, also return. */
4871 && requeued_events_pending_p ())
4874 /* If we are not checking for keyboard input now,
4875 do process events (but don't run any timers).
4876 This is so that X events will be processed.
4877 Otherwise they may have to wait until polling takes place.
4878 That would causes delays in pasting selections, for example.
4880 (We used to do this only if wait_for_cell.) */
4881 if (read_kbd
== 0 && detect_input_pending ())
4883 swallow_events (do_display
);
4884 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4885 if (detect_input_pending ())
4890 /* Exit now if the cell we're waiting for became non-nil. */
4891 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4895 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4896 go read it. This can happen with X on BSD after logging out.
4897 In that case, there really is no input and no SIGIO,
4898 but select says there is input. */
4900 if (read_kbd
&& interrupt_input
4901 && keyboard_bit_set (&Available
) && ! noninteractive
)
4902 kill (getpid (), SIGIO
);
4906 got_some_input
|= nfds
> 0;
4908 /* If checking input just got us a size-change event from X,
4909 obey it now if we should. */
4910 if (read_kbd
|| ! NILP (wait_for_cell
))
4911 do_pending_window_change (0);
4913 /* Check for data from a process. */
4914 if (no_avail
|| nfds
== 0)
4917 for (channel
= 0; channel
<= max_input_desc
; ++channel
)
4919 struct fd_callback_data
*d
= &fd_callback_info
[channel
];
4920 if (FD_ISSET (channel
, &Available
)
4922 && (d
->condition
& FOR_READ
) != 0)
4923 d
->func (channel
, d
->data
, 1);
4924 if (FD_ISSET (channel
, &write_mask
)
4926 && (d
->condition
& FOR_WRITE
) != 0)
4927 d
->func (channel
, d
->data
, 0);
4930 /* Really FIRST_PROC_DESC should be 0 on Unix,
4931 but this is safer in the short run. */
4932 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4934 if (FD_ISSET (channel
, &Available
)
4935 && FD_ISSET (channel
, &non_keyboard_wait_mask
)
4936 && !FD_ISSET (channel
, &non_process_wait_mask
))
4940 /* If waiting for this channel, arrange to return as
4941 soon as no more input to be processed. No more
4943 if (wait_channel
== channel
)
4949 proc
= chan_process
[channel
];
4953 /* If this is a server stream socket, accept connection. */
4954 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4956 server_accept_connection (proc
, channel
);
4960 /* Read data from the process, starting with our
4961 buffered-ahead character if we have one. */
4963 nread
= read_process_output (proc
, channel
);
4966 /* Since read_process_output can run a filter,
4967 which can call accept-process-output,
4968 don't try to read from any other processes
4969 before doing the select again. */
4970 FD_ZERO (&Available
);
4973 redisplay_preserve_echo_area (12);
4976 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4979 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4980 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4982 else if (nread
== -1 && errno
== EAGAIN
)
4986 else if (nread
== -1 && errno
== EAGAIN
)
4988 /* Note that we cannot distinguish between no input
4989 available now and a closed pipe.
4990 With luck, a closed pipe will be accompanied by
4991 subprocess termination and SIGCHLD. */
4992 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4994 #endif /* O_NDELAY */
4995 #endif /* O_NONBLOCK */
4997 /* On some OSs with ptys, when the process on one end of
4998 a pty exits, the other end gets an error reading with
4999 errno = EIO instead of getting an EOF (0 bytes read).
5000 Therefore, if we get an error reading and errno =
5001 EIO, just continue, because the child process has
5002 exited and should clean itself up soon (e.g. when we
5005 However, it has been known to happen that the SIGCHLD
5006 got lost. So raise the signal again just in case.
5008 else if (nread
== -1 && errno
== EIO
)
5010 /* Clear the descriptor now, so we only raise the
5011 signal once. Don't do this if `process' is only
5013 if (XPROCESS (proc
)->pid
!= -2)
5015 FD_CLR (channel
, &input_wait_mask
);
5016 FD_CLR (channel
, &non_keyboard_wait_mask
);
5018 kill (getpid (), SIGCHLD
);
5021 #endif /* HAVE_PTYS */
5022 /* If we can detect process termination, don't consider the process
5023 gone just because its pipe is closed. */
5025 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
5030 /* Preserve status of processes already terminated. */
5031 XPROCESS (proc
)->tick
= ++process_tick
;
5032 deactivate_process (proc
);
5033 if (XPROCESS (proc
)->raw_status_new
)
5034 update_status (XPROCESS (proc
));
5035 if (EQ (XPROCESS (proc
)->status
, Qrun
))
5036 XPROCESS (proc
)->status
5037 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5040 #ifdef NON_BLOCKING_CONNECT
5041 if (FD_ISSET (channel
, &Writeok
)
5042 && FD_ISSET (channel
, &connect_wait_mask
))
5044 struct Lisp_Process
*p
;
5046 FD_CLR (channel
, &connect_wait_mask
);
5047 FD_CLR (channel
, &write_mask
);
5048 if (--num_pending_connects
< 0)
5051 proc
= chan_process
[channel
];
5055 p
= XPROCESS (proc
);
5058 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
5059 So only use it on systems where it is known to work. */
5061 int xlen
= sizeof (xerrno
);
5062 if (getsockopt (channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
5067 struct sockaddr pname
;
5068 int pnamelen
= sizeof (pname
);
5070 /* If connection failed, getpeername will fail. */
5072 if (getpeername (channel
, &pname
, &pnamelen
) < 0)
5074 /* Obtain connect failure code through error slippage. */
5077 if (errno
== ENOTCONN
&& read (channel
, &dummy
, 1) < 0)
5084 p
->tick
= ++process_tick
;
5085 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
5086 deactivate_process (proc
);
5091 /* Execute the sentinel here. If we had relied on
5092 status_notify to do it later, it will read input
5093 from the process before calling the sentinel. */
5094 exec_sentinel (proc
, build_string ("open\n"));
5095 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
5097 FD_SET (p
->infd
, &input_wait_mask
);
5098 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
5102 #endif /* NON_BLOCKING_CONNECT */
5103 } /* end for each file descriptor */
5104 } /* end while exit conditions not met */
5106 unbind_to (count
, Qnil
);
5108 /* If calling from keyboard input, do not quit
5109 since we want to return C-g as an input character.
5110 Otherwise, do pending quit if requested. */
5113 /* Prevent input_pending from remaining set if we quit. */
5114 clear_input_pending ();
5118 return got_some_input
;
5121 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
5124 read_process_output_call (Lisp_Object fun_and_args
)
5126 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
5130 read_process_output_error_handler (Lisp_Object error
)
5132 cmd_error_internal (error
, "error in process filter: ");
5134 update_echo_area ();
5135 Fsleep_for (make_number (2), Qnil
);
5139 /* Read pending output from the process channel,
5140 starting with our buffered-ahead character if we have one.
5141 Yield number of decoded characters read.
5143 This function reads at most 4096 characters.
5144 If you want to read all available subprocess output,
5145 you must call it repeatedly until it returns zero.
5147 The characters read are decoded according to PROC's coding-system
5151 read_process_output (Lisp_Object proc
, register int channel
)
5153 register int nbytes
;
5155 register Lisp_Object outstream
;
5156 register struct Lisp_Process
*p
= XPROCESS (proc
);
5157 register EMACS_INT opoint
;
5158 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5159 int carryover
= p
->decoding_carryover
;
5161 int count
= SPECPDL_INDEX ();
5162 Lisp_Object odeactivate
;
5164 chars
= (char *) alloca (carryover
+ readmax
);
5166 /* See the comment above. */
5167 memcpy (chars
, SDATA (p
->decoding_buf
), carryover
);
5169 #ifdef DATAGRAM_SOCKETS
5170 /* We have a working select, so proc_buffered_char is always -1. */
5171 if (DATAGRAM_CHAN_P (channel
))
5173 int len
= datagram_address
[channel
].len
;
5174 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5175 0, datagram_address
[channel
].sa
, &len
);
5179 if (proc_buffered_char
[channel
] < 0)
5182 if (XPROCESS (proc
)->gnutls_p
)
5183 nbytes
= emacs_gnutls_read (channel
, XPROCESS (proc
),
5184 chars
+ carryover
, readmax
);
5187 nbytes
= emacs_read (channel
, chars
+ carryover
, readmax
);
5188 #ifdef ADAPTIVE_READ_BUFFERING
5189 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5191 int delay
= p
->read_output_delay
;
5194 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5197 process_output_delay_count
++;
5198 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5201 else if (delay
> 0 && (nbytes
== readmax
))
5203 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5205 process_output_delay_count
--;
5207 p
->read_output_delay
= delay
;
5210 p
->read_output_skip
= 1;
5211 process_output_skip
= 1;
5218 chars
[carryover
] = proc_buffered_char
[channel
];
5219 proc_buffered_char
[channel
] = -1;
5221 if (XPROCESS (proc
)->gnutls_p
)
5222 nbytes
= emacs_gnutls_read (channel
, XPROCESS (proc
),
5223 chars
+ carryover
+ 1, readmax
- 1);
5226 nbytes
= emacs_read (channel
, chars
+ carryover
+ 1, readmax
- 1);
5230 nbytes
= nbytes
+ 1;
5233 p
->decoding_carryover
= 0;
5235 /* At this point, NBYTES holds number of bytes just received
5236 (including the one in proc_buffered_char[channel]). */
5239 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5241 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5244 /* Now set NBYTES how many bytes we must decode. */
5245 nbytes
+= carryover
;
5247 odeactivate
= Vdeactivate_mark
;
5248 /* There's no good reason to let process filters change the current
5249 buffer, and many callers of accept-process-output, sit-for, and
5250 friends don't expect current-buffer to be changed from under them. */
5251 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
5253 /* Read and dispose of the process output. */
5254 outstream
= p
->filter
;
5255 if (!NILP (outstream
))
5257 Lisp_Object obuffer
, okeymap
;
5259 int outer_running_asynch_code
= running_asynch_code
;
5260 int waiting
= waiting_for_user_input_p
;
5262 /* No need to gcpro these, because all we do with them later
5263 is test them for EQness, and none of them should be a string. */
5264 XSETBUFFER (obuffer
, current_buffer
);
5265 okeymap
= BVAR (current_buffer
, keymap
);
5267 /* We inhibit quit here instead of just catching it so that
5268 hitting ^G when a filter happens to be running won't screw
5270 specbind (Qinhibit_quit
, Qt
);
5271 specbind (Qlast_nonmenu_event
, Qt
);
5273 /* In case we get recursively called,
5274 and we already saved the match data nonrecursively,
5275 save the same match data in safely recursive fashion. */
5276 if (outer_running_asynch_code
)
5279 /* Don't clobber the CURRENT match data, either! */
5280 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5281 restore_search_regs ();
5282 record_unwind_save_match_data ();
5283 Fset_match_data (tem
, Qt
);
5286 /* For speed, if a search happens within this code,
5287 save the match data in a special nonrecursive fashion. */
5288 running_asynch_code
= 1;
5290 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5291 text
= coding
->dst_object
;
5292 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5293 /* A new coding system might be found. */
5294 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5296 p
->decode_coding_system
= Vlast_coding_system_used
;
5298 /* Don't call setup_coding_system for
5299 proc_decode_coding_system[channel] here. It is done in
5300 detect_coding called via decode_coding above. */
5302 /* If a coding system for encoding is not yet decided, we set
5303 it as the same as coding-system for decoding.
5305 But, before doing that we must check if
5306 proc_encode_coding_system[p->outfd] surely points to a
5307 valid memory because p->outfd will be changed once EOF is
5308 sent to the process. */
5309 if (NILP (p
->encode_coding_system
)
5310 && proc_encode_coding_system
[p
->outfd
])
5312 p
->encode_coding_system
5313 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5314 setup_coding_system (p
->encode_coding_system
,
5315 proc_encode_coding_system
[p
->outfd
]);
5319 if (coding
->carryover_bytes
> 0)
5321 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5322 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5323 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5324 coding
->carryover_bytes
);
5325 p
->decoding_carryover
= coding
->carryover_bytes
;
5327 if (SBYTES (text
) > 0)
5328 internal_condition_case_1 (read_process_output_call
,
5330 Fcons (proc
, Fcons (text
, Qnil
))),
5331 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5332 read_process_output_error_handler
);
5334 /* If we saved the match data nonrecursively, restore it now. */
5335 restore_search_regs ();
5336 running_asynch_code
= outer_running_asynch_code
;
5338 /* Restore waiting_for_user_input_p as it was
5339 when we were called, in case the filter clobbered it. */
5340 waiting_for_user_input_p
= waiting
;
5342 #if 0 /* Call record_asynch_buffer_change unconditionally,
5343 because we might have changed minor modes or other things
5344 that affect key bindings. */
5345 if (! EQ (Fcurrent_buffer (), obuffer
)
5346 || ! EQ (current_buffer
->keymap
, okeymap
))
5348 /* But do it only if the caller is actually going to read events.
5349 Otherwise there's no need to make him wake up, and it could
5350 cause trouble (for example it would make sit_for return). */
5351 if (waiting_for_user_input_p
== -1)
5352 record_asynch_buffer_change ();
5355 /* If no filter, write into buffer if it isn't dead. */
5356 else if (!NILP (p
->buffer
) && !NILP (BVAR (XBUFFER (p
->buffer
), name
)))
5358 Lisp_Object old_read_only
;
5359 EMACS_INT old_begv
, old_zv
;
5360 EMACS_INT old_begv_byte
, old_zv_byte
;
5361 EMACS_INT before
, before_byte
;
5362 EMACS_INT opoint_byte
;
5366 Fset_buffer (p
->buffer
);
5368 opoint_byte
= PT_BYTE
;
5369 old_read_only
= BVAR (current_buffer
, read_only
);
5372 old_begv_byte
= BEGV_BYTE
;
5373 old_zv_byte
= ZV_BYTE
;
5375 BVAR (current_buffer
, read_only
) = Qnil
;
5377 /* Insert new output into buffer
5378 at the current end-of-output marker,
5379 thus preserving logical ordering of input and output. */
5380 if (XMARKER (p
->mark
)->buffer
)
5381 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
5382 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
5385 SET_PT_BOTH (ZV
, ZV_BYTE
);
5387 before_byte
= PT_BYTE
;
5389 /* If the output marker is outside of the visible region, save
5390 the restriction and widen. */
5391 if (! (BEGV
<= PT
&& PT
<= ZV
))
5394 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5395 text
= coding
->dst_object
;
5396 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5397 /* A new coding system might be found. See the comment in the
5398 similar code in the previous `if' block. */
5399 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5401 p
->decode_coding_system
= Vlast_coding_system_used
;
5402 if (NILP (p
->encode_coding_system
)
5403 && proc_encode_coding_system
[p
->outfd
])
5405 p
->encode_coding_system
5406 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5407 setup_coding_system (p
->encode_coding_system
,
5408 proc_encode_coding_system
[p
->outfd
]);
5411 if (coding
->carryover_bytes
> 0)
5413 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5414 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5415 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5416 coding
->carryover_bytes
);
5417 p
->decoding_carryover
= coding
->carryover_bytes
;
5419 /* Adjust the multibyteness of TEXT to that of the buffer. */
5420 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
5421 != ! STRING_MULTIBYTE (text
))
5422 text
= (STRING_MULTIBYTE (text
)
5423 ? Fstring_as_unibyte (text
)
5424 : Fstring_to_multibyte (text
));
5425 /* Insert before markers in case we are inserting where
5426 the buffer's mark is, and the user's next command is Meta-y. */
5427 insert_from_string_before_markers (text
, 0, 0,
5428 SCHARS (text
), SBYTES (text
), 0);
5430 /* Make sure the process marker's position is valid when the
5431 process buffer is changed in the signal_after_change above.
5432 W3 is known to do that. */
5433 if (BUFFERP (p
->buffer
)
5434 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5435 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5437 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5439 update_mode_lines
++;
5441 /* Make sure opoint and the old restrictions
5442 float ahead of any new text just as point would. */
5443 if (opoint
>= before
)
5445 opoint
+= PT
- before
;
5446 opoint_byte
+= PT_BYTE
- before_byte
;
5448 if (old_begv
> before
)
5450 old_begv
+= PT
- before
;
5451 old_begv_byte
+= PT_BYTE
- before_byte
;
5453 if (old_zv
>= before
)
5455 old_zv
+= PT
- before
;
5456 old_zv_byte
+= PT_BYTE
- before_byte
;
5459 /* If the restriction isn't what it should be, set it. */
5460 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5461 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5464 BVAR (current_buffer
, read_only
) = old_read_only
;
5465 SET_PT_BOTH (opoint
, opoint_byte
);
5467 /* Handling the process output should not deactivate the mark. */
5468 Vdeactivate_mark
= odeactivate
;
5470 unbind_to (count
, Qnil
);
5474 /* Sending data to subprocess */
5476 jmp_buf send_process_frame
;
5477 Lisp_Object process_sent_to
;
5480 send_process_trap (int ignore
)
5482 SIGNAL_THREAD_CHECK (SIGPIPE
);
5483 sigunblock (sigmask (SIGPIPE
));
5484 longjmp (send_process_frame
, 1);
5487 /* Send some data to process PROC.
5488 BUF is the beginning of the data; LEN is the number of characters.
5489 OBJECT is the Lisp object that the data comes from. If OBJECT is
5490 nil or t, it means that the data comes from C string.
5492 If OBJECT is not nil, the data is encoded by PROC's coding-system
5493 for encoding before it is sent.
5495 This function can evaluate Lisp code and can garbage collect. */
5498 send_process (volatile Lisp_Object proc
, const char *volatile buf
,
5499 volatile EMACS_INT len
, volatile Lisp_Object object
)
5501 /* Use volatile to protect variables from being clobbered by longjmp. */
5502 struct Lisp_Process
*p
= XPROCESS (proc
);
5504 struct coding_system
*coding
;
5505 struct gcpro gcpro1
;
5506 SIGTYPE (*volatile old_sigpipe
) (int);
5510 if (p
->raw_status_new
)
5512 if (! EQ (p
->status
, Qrun
))
5513 error ("Process %s not running", SDATA (p
->name
));
5515 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5517 coding
= proc_encode_coding_system
[p
->outfd
];
5518 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5520 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5521 || (BUFFERP (object
)
5522 && !NILP (BVAR (XBUFFER (object
), enable_multibyte_characters
)))
5525 p
->encode_coding_system
5526 = complement_process_encoding_system (p
->encode_coding_system
);
5527 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
5529 /* The coding system for encoding was changed to raw-text
5530 because we sent a unibyte text previously. Now we are
5531 sending a multibyte text, thus we must encode it by the
5532 original coding system specified for the current process.
5534 Another reason we comming here is that the coding system
5535 was just complemented and new one was returned by
5536 complement_process_encoding_system. */
5537 setup_coding_system (p
->encode_coding_system
, coding
);
5538 Vlast_coding_system_used
= p
->encode_coding_system
;
5540 coding
->src_multibyte
= 1;
5544 /* For sending a unibyte text, character code conversion should
5545 not take place but EOL conversion should. So, setup raw-text
5546 or one of the subsidiary if we have not yet done it. */
5547 if (CODING_REQUIRE_ENCODING (coding
))
5549 if (CODING_REQUIRE_FLUSHING (coding
))
5551 /* But, before changing the coding, we must flush out data. */
5552 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5553 send_process (proc
, "", 0, Qt
);
5554 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
5556 setup_coding_system (raw_text_coding_system
5557 (Vlast_coding_system_used
),
5559 coding
->src_multibyte
= 0;
5562 coding
->dst_multibyte
= 0;
5564 if (CODING_REQUIRE_ENCODING (coding
))
5566 coding
->dst_object
= Qt
;
5567 if (BUFFERP (object
))
5569 EMACS_INT from_byte
, from
, to
;
5570 EMACS_INT save_pt
, save_pt_byte
;
5571 struct buffer
*cur
= current_buffer
;
5573 set_buffer_internal (XBUFFER (object
));
5574 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
5576 from_byte
= PTR_BYTE_POS ((unsigned char *) buf
);
5577 from
= BYTE_TO_CHAR (from_byte
);
5578 to
= BYTE_TO_CHAR (from_byte
+ len
);
5579 TEMP_SET_PT_BOTH (from
, from_byte
);
5580 encode_coding_object (coding
, object
, from
, from_byte
,
5581 to
, from_byte
+ len
, Qt
);
5582 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
5583 set_buffer_internal (cur
);
5585 else if (STRINGP (object
))
5587 encode_coding_object (coding
, object
, 0, 0, SCHARS (object
),
5588 SBYTES (object
), Qt
);
5592 coding
->dst_object
= make_unibyte_string (buf
, len
);
5593 coding
->produced
= len
;
5596 len
= coding
->produced
;
5597 object
= coding
->dst_object
;
5598 buf
= SSDATA (object
);
5601 if (pty_max_bytes
== 0)
5603 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5604 pty_max_bytes
= fpathconf (p
->outfd
, _PC_MAX_CANON
);
5605 if (pty_max_bytes
< 0)
5606 pty_max_bytes
= 250;
5608 pty_max_bytes
= 250;
5610 /* Deduct one, to leave space for the eof. */
5614 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
5615 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
5616 when returning with longjmp despite being declared volatile. */
5617 if (!setjmp (send_process_frame
))
5619 process_sent_to
= proc
;
5622 EMACS_INT
this = len
;
5624 /* Send this batch, using one or more write calls. */
5627 int outfd
= p
->outfd
;
5628 old_sigpipe
= (SIGTYPE (*) (int)) signal (SIGPIPE
, send_process_trap
);
5629 #ifdef DATAGRAM_SOCKETS
5630 if (DATAGRAM_CHAN_P (outfd
))
5632 rv
= sendto (outfd
, buf
, this,
5633 0, datagram_address
[outfd
].sa
,
5634 datagram_address
[outfd
].len
);
5635 if (rv
< 0 && errno
== EMSGSIZE
)
5637 signal (SIGPIPE
, old_sigpipe
);
5638 report_file_error ("sending datagram",
5639 Fcons (proc
, Qnil
));
5646 if (XPROCESS (proc
)->gnutls_p
)
5647 rv
= emacs_gnutls_write (outfd
,
5652 rv
= emacs_write (outfd
, buf
, this);
5653 #ifdef ADAPTIVE_READ_BUFFERING
5654 if (p
->read_output_delay
> 0
5655 && p
->adaptive_read_buffering
== 1)
5657 p
->read_output_delay
= 0;
5658 process_output_delay_count
--;
5659 p
->read_output_skip
= 0;
5663 signal (SIGPIPE
, old_sigpipe
);
5669 || errno
== EWOULDBLOCK
5675 /* Buffer is full. Wait, accepting input;
5676 that may allow the program
5677 to finish doing output and read more. */
5681 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5682 /* A gross hack to work around a bug in FreeBSD.
5683 In the following sequence, read(2) returns
5687 write(2) 954 bytes, get EAGAIN
5688 read(2) 1024 bytes in process_read_output
5689 read(2) 11 bytes in process_read_output
5691 That is, read(2) returns more bytes than have
5692 ever been written successfully. The 1033 bytes
5693 read are the 1022 bytes written successfully
5694 after processing (for example with CRs added if
5695 the terminal is set up that way which it is
5696 here). The same bytes will be seen again in a
5697 later read(2), without the CRs. */
5699 if (errno
== EAGAIN
)
5702 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5704 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5706 /* Running filters might relocate buffers or strings.
5707 Arrange to relocate BUF. */
5708 if (BUFFERP (object
))
5709 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
),
5710 (unsigned char *) buf
);
5711 else if (STRINGP (object
))
5712 offset
= buf
- SSDATA (object
);
5714 #ifdef EMACS_HAS_USECS
5715 wait_reading_process_output (0, 20000, 0, 0, Qnil
, NULL
, 0);
5717 wait_reading_process_output (1, 0, 0, 0, Qnil
, NULL
, 0);
5720 if (BUFFERP (object
))
5721 buf
= (char *) BUF_BYTE_ADDRESS (XBUFFER (object
),
5723 else if (STRINGP (object
))
5724 buf
= offset
+ SSDATA (object
);
5729 /* This is a real error. */
5730 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5740 signal (SIGPIPE
, old_sigpipe
);
5741 proc
= process_sent_to
;
5742 p
= XPROCESS (proc
);
5743 p
->raw_status_new
= 0;
5744 p
->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5745 p
->tick
= ++process_tick
;
5746 deactivate_process (proc
);
5747 error ("SIGPIPE raised on process %s; closed it", SDATA (p
->name
));
5753 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5755 doc
: /* Send current contents of region as input to PROCESS.
5756 PROCESS may be a process, a buffer, the name of a process or buffer, or
5757 nil, indicating the current buffer's process.
5758 Called from program, takes three arguments, PROCESS, START and END.
5759 If the region is more than 500 characters long,
5760 it is sent in several bunches. This may happen even for shorter regions.
5761 Output from processes can arrive in between bunches. */)
5762 (Lisp_Object process
, Lisp_Object start
, Lisp_Object end
)
5765 EMACS_INT start1
, end1
;
5767 proc
= get_process (process
);
5768 validate_region (&start
, &end
);
5770 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5771 move_gap (XINT (start
));
5773 start1
= CHAR_TO_BYTE (XINT (start
));
5774 end1
= CHAR_TO_BYTE (XINT (end
));
5775 send_process (proc
, (char *) BYTE_POS_ADDR (start1
), end1
- start1
,
5776 Fcurrent_buffer ());
5781 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5783 doc
: /* Send PROCESS the contents of STRING as input.
5784 PROCESS may be a process, a buffer, the name of a process or buffer, or
5785 nil, indicating the current buffer's process.
5786 If STRING is more than 500 characters long,
5787 it is sent in several bunches. This may happen even for shorter strings.
5788 Output from processes can arrive in between bunches. */)
5789 (Lisp_Object process
, Lisp_Object string
)
5792 CHECK_STRING (string
);
5793 proc
= get_process (process
);
5794 send_process (proc
, SSDATA (string
),
5795 SBYTES (string
), string
);
5799 /* Return the foreground process group for the tty/pty that
5800 the process P uses. */
5802 emacs_get_tty_pgrp (struct Lisp_Process
*p
)
5807 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5810 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5811 master side. Try the slave side. */
5812 fd
= emacs_open (SSDATA (p
->tty_name
), O_RDONLY
, 0);
5816 ioctl (fd
, TIOCGPGRP
, &gid
);
5820 #endif /* defined (TIOCGPGRP ) */
5825 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5826 Sprocess_running_child_p
, 0, 1, 0,
5827 doc
: /* Return t if PROCESS has given the terminal to a child.
5828 If the operating system does not make it possible to find out,
5829 return t unconditionally. */)
5830 (Lisp_Object process
)
5832 /* Initialize in case ioctl doesn't exist or gives an error,
5833 in a way that will cause returning t. */
5836 struct Lisp_Process
*p
;
5838 proc
= get_process (process
);
5839 p
= XPROCESS (proc
);
5841 if (!EQ (p
->type
, Qreal
))
5842 error ("Process %s is not a subprocess",
5845 error ("Process %s is not active",
5848 gid
= emacs_get_tty_pgrp (p
);
5855 /* send a signal number SIGNO to PROCESS.
5856 If CURRENT_GROUP is t, that means send to the process group
5857 that currently owns the terminal being used to communicate with PROCESS.
5858 This is used for various commands in shell mode.
5859 If CURRENT_GROUP is lambda, that means send to the process group
5860 that currently owns the terminal, but only if it is NOT the shell itself.
5862 If NOMSG is zero, insert signal-announcements into process's buffers
5865 If we can, we try to signal PROCESS by sending control characters
5866 down the pty. This allows us to signal inferiors who have changed
5867 their uid, for which killpg would return an EPERM error. */
5870 process_send_signal (Lisp_Object process
, int signo
, Lisp_Object current_group
,
5874 register struct Lisp_Process
*p
;
5878 proc
= get_process (process
);
5879 p
= XPROCESS (proc
);
5881 if (!EQ (p
->type
, Qreal
))
5882 error ("Process %s is not a subprocess",
5885 error ("Process %s is not active",
5889 current_group
= Qnil
;
5891 /* If we are using pgrps, get a pgrp number and make it negative. */
5892 if (NILP (current_group
))
5893 /* Send the signal to the shell's process group. */
5897 #ifdef SIGNALS_VIA_CHARACTERS
5898 /* If possible, send signals to the entire pgrp
5899 by sending an input character to it. */
5902 cc_t
*sig_char
= NULL
;
5904 tcgetattr (p
->infd
, &t
);
5909 sig_char
= &t
.c_cc
[VINTR
];
5913 sig_char
= &t
.c_cc
[VQUIT
];
5917 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5918 sig_char
= &t
.c_cc
[VSWTCH
];
5920 sig_char
= &t
.c_cc
[VSUSP
];
5925 if (sig_char
&& *sig_char
!= CDISABLE
)
5927 send_process (proc
, sig_char
, 1, Qnil
);
5930 /* If we can't send the signal with a character,
5931 fall through and send it another way. */
5933 /* The code above may fall through if it can't
5934 handle the signal. */
5935 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5938 /* Get the current pgrp using the tty itself, if we have that.
5939 Otherwise, use the pty to get the pgrp.
5940 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5941 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5942 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5943 His patch indicates that if TIOCGPGRP returns an error, then
5944 we should just assume that p->pid is also the process group id. */
5946 gid
= emacs_get_tty_pgrp (p
);
5949 /* If we can't get the information, assume
5950 the shell owns the tty. */
5953 /* It is not clear whether anything really can set GID to -1.
5954 Perhaps on some system one of those ioctls can or could do so.
5955 Or perhaps this is vestigial. */
5958 #else /* ! defined (TIOCGPGRP ) */
5959 /* Can't select pgrps on this system, so we know that
5960 the child itself heads the pgrp. */
5962 #endif /* ! defined (TIOCGPGRP ) */
5964 /* If current_group is lambda, and the shell owns the terminal,
5965 don't send any signal. */
5966 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
5974 p
->raw_status_new
= 0;
5976 p
->tick
= ++process_tick
;
5979 status_notify (NULL
);
5980 redisplay_preserve_echo_area (13);
5983 #endif /* ! defined (SIGCONT) */
5987 flush_pending_output (p
->infd
);
5991 /* If we don't have process groups, send the signal to the immediate
5992 subprocess. That isn't really right, but it's better than any
5993 obvious alternative. */
5996 kill (p
->pid
, signo
);
6000 /* gid may be a pid, or minus a pgrp's number */
6002 if (!NILP (current_group
))
6004 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
6005 EMACS_KILLPG (gid
, signo
);
6012 #else /* ! defined (TIOCSIGSEND) */
6013 EMACS_KILLPG (gid
, signo
);
6014 #endif /* ! defined (TIOCSIGSEND) */
6017 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
6018 doc
: /* Interrupt process PROCESS.
6019 PROCESS may be a process, a buffer, or the name of a process or buffer.
6020 No arg or nil means current buffer's process.
6021 Second arg CURRENT-GROUP non-nil means send signal to
6022 the current process-group of the process's controlling terminal
6023 rather than to the process's own process group.
6024 If the process is a shell, this means interrupt current subjob
6025 rather than the shell.
6027 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
6028 don't send the signal. */)
6029 (Lisp_Object process
, Lisp_Object current_group
)
6031 process_send_signal (process
, SIGINT
, current_group
, 0);
6035 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
6036 doc
: /* Kill process PROCESS. May be process or name of one.
6037 See function `interrupt-process' for more details on usage. */)
6038 (Lisp_Object process
, Lisp_Object current_group
)
6040 process_send_signal (process
, SIGKILL
, current_group
, 0);
6044 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
6045 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
6046 See function `interrupt-process' for more details on usage. */)
6047 (Lisp_Object process
, Lisp_Object current_group
)
6049 process_send_signal (process
, SIGQUIT
, current_group
, 0);
6053 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
6054 doc
: /* Stop process PROCESS. May be process or name of one.
6055 See function `interrupt-process' for more details on usage.
6056 If PROCESS is a network or serial process, inhibit handling of incoming
6058 (Lisp_Object process
, Lisp_Object current_group
)
6060 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6062 struct Lisp_Process
*p
;
6064 p
= XPROCESS (process
);
6065 if (NILP (p
->command
)
6068 FD_CLR (p
->infd
, &input_wait_mask
);
6069 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6075 error ("No SIGTSTP support");
6077 process_send_signal (process
, SIGTSTP
, current_group
, 0);
6082 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
6083 doc
: /* Continue process PROCESS. May be process or name of one.
6084 See function `interrupt-process' for more details on usage.
6085 If PROCESS is a network or serial process, resume handling of incoming
6087 (Lisp_Object process
, Lisp_Object current_group
)
6089 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6091 struct Lisp_Process
*p
;
6093 p
= XPROCESS (process
);
6094 if (EQ (p
->command
, Qt
)
6096 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
6098 FD_SET (p
->infd
, &input_wait_mask
);
6099 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
6101 if (fd_info
[ p
->infd
].flags
& FILE_SERIAL
)
6102 PurgeComm (fd_info
[ p
->infd
].hnd
, PURGE_RXABORT
| PURGE_RXCLEAR
);
6103 #else /* not WINDOWSNT */
6104 tcflush (p
->infd
, TCIFLUSH
);
6105 #endif /* not WINDOWSNT */
6111 process_send_signal (process
, SIGCONT
, current_group
, 0);
6113 error ("No SIGCONT support");
6118 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
6119 2, 2, "sProcess (name or number): \nnSignal code: ",
6120 doc
: /* Send PROCESS the signal with code SIGCODE.
6121 PROCESS may also be a number specifying the process id of the
6122 process to signal; in this case, the process need not be a child of
6124 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
6125 (Lisp_Object process
, Lisp_Object sigcode
)
6129 if (INTEGERP (process
))
6131 pid
= XINT (process
);
6135 if (FLOATP (process
))
6137 pid
= (pid_t
) XFLOAT_DATA (process
);
6141 if (STRINGP (process
))
6144 if (tem
= Fget_process (process
), NILP (tem
))
6146 pid
= XINT (Fstring_to_number (process
, make_number (10)));
6153 process
= get_process (process
);
6158 CHECK_PROCESS (process
);
6159 pid
= XPROCESS (process
)->pid
;
6161 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6165 #define parse_signal(NAME, VALUE) \
6166 else if (!xstrcasecmp (name, NAME)) \
6167 XSETINT (sigcode, VALUE)
6169 if (INTEGERP (sigcode
))
6175 CHECK_SYMBOL (sigcode
);
6176 name
= SSDATA (SYMBOL_NAME (sigcode
));
6178 if (!strncmp (name
, "SIG", 3) || !strncmp (name
, "sig", 3))
6184 parse_signal ("usr1", SIGUSR1
);
6187 parse_signal ("usr2", SIGUSR2
);
6190 parse_signal ("term", SIGTERM
);
6193 parse_signal ("hup", SIGHUP
);
6196 parse_signal ("int", SIGINT
);
6199 parse_signal ("quit", SIGQUIT
);
6202 parse_signal ("ill", SIGILL
);
6205 parse_signal ("abrt", SIGABRT
);
6208 parse_signal ("emt", SIGEMT
);
6211 parse_signal ("kill", SIGKILL
);
6214 parse_signal ("fpe", SIGFPE
);
6217 parse_signal ("bus", SIGBUS
);
6220 parse_signal ("segv", SIGSEGV
);
6223 parse_signal ("sys", SIGSYS
);
6226 parse_signal ("pipe", SIGPIPE
);
6229 parse_signal ("alrm", SIGALRM
);
6232 parse_signal ("urg", SIGURG
);
6235 parse_signal ("stop", SIGSTOP
);
6238 parse_signal ("tstp", SIGTSTP
);
6241 parse_signal ("cont", SIGCONT
);
6244 parse_signal ("chld", SIGCHLD
);
6247 parse_signal ("ttin", SIGTTIN
);
6250 parse_signal ("ttou", SIGTTOU
);
6253 parse_signal ("io", SIGIO
);
6256 parse_signal ("xcpu", SIGXCPU
);
6259 parse_signal ("xfsz", SIGXFSZ
);
6262 parse_signal ("vtalrm", SIGVTALRM
);
6265 parse_signal ("prof", SIGPROF
);
6268 parse_signal ("winch", SIGWINCH
);
6271 parse_signal ("info", SIGINFO
);
6274 error ("Undefined signal name %s", name
);
6279 return make_number (kill (pid
, XINT (sigcode
)));
6282 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6283 doc
: /* Make PROCESS see end-of-file in its input.
6284 EOF comes after any text already sent to it.
6285 PROCESS may be a process, a buffer, the name of a process or buffer, or
6286 nil, indicating the current buffer's process.
6287 If PROCESS is a network connection, or is a process communicating
6288 through a pipe (as opposed to a pty), then you cannot send any more
6289 text to PROCESS after you call this function.
6290 If PROCESS is a serial process, wait until all output written to the
6291 process has been transmitted to the serial port. */)
6292 (Lisp_Object process
)
6295 struct coding_system
*coding
;
6297 if (DATAGRAM_CONN_P (process
))
6300 proc
= get_process (process
);
6301 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6303 /* Make sure the process is really alive. */
6304 if (XPROCESS (proc
)->raw_status_new
)
6305 update_status (XPROCESS (proc
));
6306 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6307 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6309 if (CODING_REQUIRE_FLUSHING (coding
))
6311 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6312 send_process (proc
, "", 0, Qnil
);
6315 if (XPROCESS (proc
)->pty_flag
)
6316 send_process (proc
, "\004", 1, Qnil
);
6317 else if (EQ (XPROCESS (proc
)->type
, Qserial
))
6320 if (tcdrain (XPROCESS (proc
)->outfd
) != 0)
6321 error ("tcdrain() failed: %s", emacs_strerror (errno
));
6322 #endif /* not WINDOWSNT */
6323 /* Do nothing on Windows because writes are blocking. */
6327 int old_outfd
, new_outfd
;
6329 #ifdef HAVE_SHUTDOWN
6330 /* If this is a network connection, or socketpair is used
6331 for communication with the subprocess, call shutdown to cause EOF.
6332 (In some old system, shutdown to socketpair doesn't work.
6333 Then we just can't win.) */
6334 if (EQ (XPROCESS (proc
)->type
, Qnetwork
)
6335 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6336 shutdown (XPROCESS (proc
)->outfd
, 1);
6337 /* In case of socketpair, outfd == infd, so don't close it. */
6338 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6339 emacs_close (XPROCESS (proc
)->outfd
);
6340 #else /* not HAVE_SHUTDOWN */
6341 emacs_close (XPROCESS (proc
)->outfd
);
6342 #endif /* not HAVE_SHUTDOWN */
6343 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6346 old_outfd
= XPROCESS (proc
)->outfd
;
6348 if (!proc_encode_coding_system
[new_outfd
])
6349 proc_encode_coding_system
[new_outfd
]
6350 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6351 memcpy (proc_encode_coding_system
[new_outfd
],
6352 proc_encode_coding_system
[old_outfd
],
6353 sizeof (struct coding_system
));
6354 memset (proc_encode_coding_system
[old_outfd
], 0,
6355 sizeof (struct coding_system
));
6357 XPROCESS (proc
)->outfd
= new_outfd
;
6362 /* On receipt of a signal that a child status has changed, loop asking
6363 about children with changed statuses until the system says there
6366 All we do is change the status; we do not run sentinels or print
6367 notifications. That is saved for the next time keyboard input is
6368 done, in order to avoid timing errors.
6370 ** WARNING: this can be called during garbage collection.
6371 Therefore, it must not be fooled by the presence of mark bits in
6374 ** USG WARNING: Although it is not obvious from the documentation
6375 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6376 signal() before executing at least one wait(), otherwise the
6377 handler will be called again, resulting in an infinite loop. The
6378 relevant portion of the documentation reads "SIGCLD signals will be
6379 queued and the signal-catching function will be continually
6380 reentered until the queue is empty". Invoking signal() causes the
6381 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6384 ** Malloc WARNING: This should never call malloc either directly or
6385 indirectly; if it does, that is a bug */
6389 sigchld_handler (int signo
)
6391 int old_errno
= errno
;
6393 struct Lisp_Process
*p
;
6395 SIGNAL_THREAD_CHECK (signo
);
6406 #endif /* no WUNTRACED */
6407 /* Keep trying to get a status until we get a definitive result. */
6411 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
6413 while (pid
< 0 && errno
== EINTR
);
6417 /* PID == 0 means no processes found, PID == -1 means a real
6418 failure. We have done all our job, so return. */
6425 #endif /* no WNOHANG */
6427 /* Find the process that signaled us, and record its status. */
6429 /* The process can have been deleted by Fdelete_process. */
6430 for (tail
= deleted_pid_list
; CONSP (tail
); tail
= XCDR (tail
))
6432 Lisp_Object xpid
= XCAR (tail
);
6433 if ((INTEGERP (xpid
) && pid
== (pid_t
) XINT (xpid
))
6434 || (FLOATP (xpid
) && pid
== (pid_t
) XFLOAT_DATA (xpid
)))
6436 XSETCAR (tail
, Qnil
);
6437 goto sigchld_end_of_loop
;
6441 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6443 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6445 proc
= XCDR (XCAR (tail
));
6446 p
= XPROCESS (proc
);
6447 if (EQ (p
->type
, Qreal
) && p
->pid
== pid
)
6452 /* Look for an asynchronous process whose pid hasn't been filled
6455 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6457 proc
= XCDR (XCAR (tail
));
6458 p
= XPROCESS (proc
);
6464 /* Change the status of the process that was found. */
6467 int clear_desc_flag
= 0;
6469 p
->tick
= ++process_tick
;
6471 p
->raw_status_new
= 1;
6473 /* If process has terminated, stop waiting for its output. */
6474 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6476 clear_desc_flag
= 1;
6478 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6479 if (clear_desc_flag
)
6481 FD_CLR (p
->infd
, &input_wait_mask
);
6482 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6485 /* Tell wait_reading_process_output that it needs to wake up and
6487 if (input_available_clear_time
)
6488 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6491 /* There was no asynchronous process found for that pid: we have
6492 a synchronous process. */
6495 synch_process_alive
= 0;
6497 /* Report the status of the synchronous process. */
6499 synch_process_retcode
= WRETCODE (w
);
6500 else if (WIFSIGNALED (w
))
6501 synch_process_termsig
= WTERMSIG (w
);
6503 /* Tell wait_reading_process_output that it needs to wake up and
6505 if (input_available_clear_time
)
6506 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6509 sigchld_end_of_loop
:
6512 /* On some systems, we must return right away.
6513 If any more processes want to signal us, we will
6515 Otherwise (on systems that have WNOHANG), loop around
6516 to use up all the processes that have something to tell us. */
6517 #if (defined WINDOWSNT \
6518 || (defined USG && !defined GNU_LINUX \
6519 && !(defined HPUX && defined WNOHANG)))
6522 #endif /* USG, but not HPUX with WNOHANG */
6525 #endif /* SIGCHLD */
6529 exec_sentinel_unwind (Lisp_Object data
)
6531 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
6536 exec_sentinel_error_handler (Lisp_Object error
)
6538 cmd_error_internal (error
, "error in process sentinel: ");
6540 update_echo_area ();
6541 Fsleep_for (make_number (2), Qnil
);
6546 exec_sentinel (Lisp_Object proc
, Lisp_Object reason
)
6548 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
6549 register struct Lisp_Process
*p
= XPROCESS (proc
);
6550 int count
= SPECPDL_INDEX ();
6551 int outer_running_asynch_code
= running_asynch_code
;
6552 int waiting
= waiting_for_user_input_p
;
6554 if (inhibit_sentinels
)
6557 /* No need to gcpro these, because all we do with them later
6558 is test them for EQness, and none of them should be a string. */
6559 odeactivate
= Vdeactivate_mark
;
6560 XSETBUFFER (obuffer
, current_buffer
);
6561 okeymap
= BVAR (current_buffer
, keymap
);
6563 /* There's no good reason to let sentinels change the current
6564 buffer, and many callers of accept-process-output, sit-for, and
6565 friends don't expect current-buffer to be changed from under them. */
6566 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
6568 sentinel
= p
->sentinel
;
6569 if (NILP (sentinel
))
6572 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6573 assure that it gets restored no matter how the sentinel exits. */
6575 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6576 /* Inhibit quit so that random quits don't screw up a running filter. */
6577 specbind (Qinhibit_quit
, Qt
);
6578 specbind (Qlast_nonmenu_event
, Qt
); /* Why? --Stef */
6580 /* In case we get recursively called,
6581 and we already saved the match data nonrecursively,
6582 save the same match data in safely recursive fashion. */
6583 if (outer_running_asynch_code
)
6586 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6587 restore_search_regs ();
6588 record_unwind_save_match_data ();
6589 Fset_match_data (tem
, Qt
);
6592 /* For speed, if a search happens within this code,
6593 save the match data in a special nonrecursive fashion. */
6594 running_asynch_code
= 1;
6596 internal_condition_case_1 (read_process_output_call
,
6598 Fcons (proc
, Fcons (reason
, Qnil
))),
6599 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6600 exec_sentinel_error_handler
);
6602 /* If we saved the match data nonrecursively, restore it now. */
6603 restore_search_regs ();
6604 running_asynch_code
= outer_running_asynch_code
;
6606 Vdeactivate_mark
= odeactivate
;
6608 /* Restore waiting_for_user_input_p as it was
6609 when we were called, in case the filter clobbered it. */
6610 waiting_for_user_input_p
= waiting
;
6613 if (! EQ (Fcurrent_buffer (), obuffer
)
6614 || ! EQ (current_buffer
->keymap
, okeymap
))
6616 /* But do it only if the caller is actually going to read events.
6617 Otherwise there's no need to make him wake up, and it could
6618 cause trouble (for example it would make sit_for return). */
6619 if (waiting_for_user_input_p
== -1)
6620 record_asynch_buffer_change ();
6622 unbind_to (count
, Qnil
);
6625 /* Report all recent events of a change in process status
6626 (either run the sentinel or output a message).
6627 This is usually done while Emacs is waiting for keyboard input
6628 but can be done at other times. */
6631 status_notify (struct Lisp_Process
*deleting_process
)
6633 register Lisp_Object proc
, buffer
;
6634 Lisp_Object tail
, msg
;
6635 struct gcpro gcpro1
, gcpro2
;
6639 /* We need to gcpro tail; if read_process_output calls a filter
6640 which deletes a process and removes the cons to which tail points
6641 from Vprocess_alist, and then causes a GC, tail is an unprotected
6645 /* Set this now, so that if new processes are created by sentinels
6646 that we run, we get called again to handle their status changes. */
6647 update_tick
= process_tick
;
6649 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6652 register struct Lisp_Process
*p
;
6654 proc
= Fcdr (XCAR (tail
));
6655 p
= XPROCESS (proc
);
6657 if (p
->tick
!= p
->update_tick
)
6659 p
->update_tick
= p
->tick
;
6661 /* If process is still active, read any output that remains. */
6662 while (! EQ (p
->filter
, Qt
)
6663 && ! EQ (p
->status
, Qconnect
)
6664 && ! EQ (p
->status
, Qlisten
)
6665 /* Network or serial process not stopped: */
6666 && ! EQ (p
->command
, Qt
)
6668 && p
!= deleting_process
6669 && read_process_output (proc
, p
->infd
) > 0);
6673 /* Get the text to use for the message. */
6674 if (p
->raw_status_new
)
6676 msg
= status_message (p
);
6678 /* If process is terminated, deactivate it or delete it. */
6680 if (CONSP (p
->status
))
6681 symbol
= XCAR (p
->status
);
6683 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6684 || EQ (symbol
, Qclosed
))
6686 if (delete_exited_processes
)
6687 remove_process (proc
);
6689 deactivate_process (proc
);
6692 /* The actions above may have further incremented p->tick.
6693 So set p->update_tick again
6694 so that an error in the sentinel will not cause
6695 this code to be run again. */
6696 p
->update_tick
= p
->tick
;
6697 /* Now output the message suitably. */
6698 if (!NILP (p
->sentinel
))
6699 exec_sentinel (proc
, msg
);
6700 /* Don't bother with a message in the buffer
6701 when a process becomes runnable. */
6702 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6705 struct buffer
*old
= current_buffer
;
6706 EMACS_INT opoint
, opoint_byte
;
6707 EMACS_INT before
, before_byte
;
6709 /* Avoid error if buffer is deleted
6710 (probably that's why the process is dead, too) */
6711 if (NILP (BVAR (XBUFFER (buffer
), name
)))
6713 Fset_buffer (buffer
);
6716 opoint_byte
= PT_BYTE
;
6717 /* Insert new output into buffer
6718 at the current end-of-output marker,
6719 thus preserving logical ordering of input and output. */
6720 if (XMARKER (p
->mark
)->buffer
)
6721 Fgoto_char (p
->mark
);
6723 SET_PT_BOTH (ZV
, ZV_BYTE
);
6726 before_byte
= PT_BYTE
;
6728 tem
= BVAR (current_buffer
, read_only
);
6729 BVAR (current_buffer
, read_only
) = Qnil
;
6730 insert_string ("\nProcess ");
6731 Finsert (1, &p
->name
);
6732 insert_string (" ");
6734 BVAR (current_buffer
, read_only
) = tem
;
6735 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6737 if (opoint
>= before
)
6738 SET_PT_BOTH (opoint
+ (PT
- before
),
6739 opoint_byte
+ (PT_BYTE
- before_byte
));
6741 SET_PT_BOTH (opoint
, opoint_byte
);
6743 set_buffer_internal (old
);
6748 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6753 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6754 Sset_process_coding_system
, 1, 3, 0,
6755 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6756 DECODING will be used to decode subprocess output and ENCODING to
6757 encode subprocess input. */)
6758 (register Lisp_Object process
, Lisp_Object decoding
, Lisp_Object encoding
)
6760 register struct Lisp_Process
*p
;
6762 CHECK_PROCESS (process
);
6763 p
= XPROCESS (process
);
6765 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6767 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6768 Fcheck_coding_system (decoding
);
6769 Fcheck_coding_system (encoding
);
6770 encoding
= coding_inherit_eol_type (encoding
, Qnil
);
6771 p
->decode_coding_system
= decoding
;
6772 p
->encode_coding_system
= encoding
;
6773 setup_process_coding_systems (process
);
6778 DEFUN ("process-coding-system",
6779 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6780 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6781 (register Lisp_Object process
)
6783 CHECK_PROCESS (process
);
6784 return Fcons (XPROCESS (process
)->decode_coding_system
,
6785 XPROCESS (process
)->encode_coding_system
);
6788 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6789 Sset_process_filter_multibyte
, 2, 2, 0,
6790 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6791 If FLAG is non-nil, the filter is given multibyte strings.
6792 If FLAG is nil, the filter is given unibyte strings. In this case,
6793 all character code conversion except for end-of-line conversion is
6795 (Lisp_Object process
, Lisp_Object flag
)
6797 register struct Lisp_Process
*p
;
6799 CHECK_PROCESS (process
);
6800 p
= XPROCESS (process
);
6802 p
->decode_coding_system
= raw_text_coding_system (p
->decode_coding_system
);
6803 setup_process_coding_systems (process
);
6808 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6809 Sprocess_filter_multibyte_p
, 1, 1, 0,
6810 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6811 (Lisp_Object process
)
6813 register struct Lisp_Process
*p
;
6814 struct coding_system
*coding
;
6816 CHECK_PROCESS (process
);
6817 p
= XPROCESS (process
);
6818 coding
= proc_decode_coding_system
[p
->infd
];
6819 return (CODING_FOR_UNIBYTE (coding
) ? Qnil
: Qt
);
6826 add_gpm_wait_descriptor (int desc
)
6828 add_keyboard_wait_descriptor (desc
);
6832 delete_gpm_wait_descriptor (int desc
)
6834 delete_keyboard_wait_descriptor (desc
);
6837 /* Return nonzero if *MASK has a bit set
6838 that corresponds to one of the keyboard input descriptors. */
6841 keyboard_bit_set (fd_set
*mask
)
6845 for (fd
= 0; fd
<= max_input_desc
; fd
++)
6846 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6847 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6853 #else /* not subprocesses */
6855 /* Defined on msdos.c. */
6856 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
6859 /* Implementation of wait_reading_process_output, assuming that there
6860 are no subprocesses. Used only by the MS-DOS build.
6862 Wait for timeout to elapse and/or keyboard input to be available.
6865 timeout in seconds, or
6866 zero for no limit, or
6867 -1 means gobble data immediately available but don't wait for any.
6869 read_kbd is a Lisp_Object:
6870 0 to ignore keyboard input, or
6871 1 to return when input is available, or
6872 -1 means caller will actually read the input, so don't throw to
6875 see full version for other parameters. We know that wait_proc will
6876 always be NULL, since `subprocesses' isn't defined.
6878 do_display != 0 means redisplay should be done to show subprocess
6879 output that arrives.
6881 Return true if we received input from any process. */
6884 wait_reading_process_output (int time_limit
, int microsecs
, int read_kbd
,
6886 Lisp_Object wait_for_cell
,
6887 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
6890 EMACS_TIME end_time
, timeout
;
6891 SELECT_TYPE waitchannels
;
6894 /* What does time_limit really mean? */
6895 if (time_limit
|| microsecs
)
6897 EMACS_GET_TIME (end_time
);
6898 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
6899 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6902 /* Turn off periodic alarms (in case they are in use)
6903 and then turn off any other atimers,
6904 because the select emulator uses alarms. */
6906 turn_on_atimers (0);
6910 int timeout_reduced_for_timers
= 0;
6912 /* If calling from keyboard input, do not quit
6913 since we want to return C-g as an input character.
6914 Otherwise, do pending quit if requested. */
6918 /* Exit now if the cell we're waiting for became non-nil. */
6919 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6922 /* Compute time from now till when time limit is up */
6923 /* Exit if already run out */
6924 if (time_limit
== -1)
6926 /* -1 specified for timeout means
6927 gobble output available now
6928 but don't wait at all. */
6930 EMACS_SET_SECS_USECS (timeout
, 0, 0);
6932 else if (time_limit
|| microsecs
)
6934 EMACS_GET_TIME (timeout
);
6935 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6936 if (EMACS_TIME_NEG_P (timeout
))
6941 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
6944 /* If our caller will not immediately handle keyboard events,
6945 run timer events directly.
6946 (Callers that will immediately read keyboard events
6947 call timer_delay on their own.) */
6948 if (NILP (wait_for_cell
))
6950 EMACS_TIME timer_delay
;
6954 int old_timers_run
= timers_run
;
6955 timer_delay
= timer_check (1);
6956 if (timers_run
!= old_timers_run
&& do_display
)
6957 /* We must retry, since a timer may have requeued itself
6958 and that could alter the time delay. */
6959 redisplay_preserve_echo_area (14);
6963 while (!detect_input_pending ());
6965 /* If there is unread keyboard input, also return. */
6967 && requeued_events_pending_p ())
6970 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
6972 EMACS_TIME difference
;
6973 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
6974 if (EMACS_TIME_NEG_P (difference
))
6976 timeout
= timer_delay
;
6977 timeout_reduced_for_timers
= 1;
6982 /* Cause C-g and alarm signals to take immediate action,
6983 and cause input available signals to zero out timeout. */
6985 set_waiting_for_input (&timeout
);
6987 /* Wait till there is something to do. */
6989 if (! read_kbd
&& NILP (wait_for_cell
))
6990 FD_ZERO (&waitchannels
);
6992 FD_SET (0, &waitchannels
);
6994 /* If a frame has been newly mapped and needs updating,
6995 reprocess its display stuff. */
6996 if (frame_garbaged
&& do_display
)
6998 clear_waiting_for_input ();
6999 redisplay_preserve_echo_area (15);
7001 set_waiting_for_input (&timeout
);
7004 if (read_kbd
&& detect_input_pending ())
7007 FD_ZERO (&waitchannels
);
7010 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
7015 /* Make C-g and alarm signals set flags again */
7016 clear_waiting_for_input ();
7018 /* If we woke up due to SIGWINCH, actually change size now. */
7019 do_pending_window_change (0);
7021 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
7022 /* We waited the full specified time, so return now. */
7027 /* If the system call was interrupted, then go around the
7029 if (xerrno
== EINTR
)
7030 FD_ZERO (&waitchannels
);
7032 error ("select error: %s", emacs_strerror (xerrno
));
7035 /* Check for keyboard input */
7038 && detect_input_pending_run_timers (do_display
))
7040 swallow_events (do_display
);
7041 if (detect_input_pending_run_timers (do_display
))
7045 /* If there is unread keyboard input, also return. */
7047 && requeued_events_pending_p ())
7050 /* If wait_for_cell. check for keyboard input
7051 but don't run any timers.
7052 ??? (It seems wrong to me to check for keyboard
7053 input at all when wait_for_cell, but the code
7054 has been this way since July 1994.
7055 Try changing this after version 19.31.) */
7056 if (! NILP (wait_for_cell
)
7057 && detect_input_pending ())
7059 swallow_events (do_display
);
7060 if (detect_input_pending ())
7064 /* Exit now if the cell we're waiting for became non-nil. */
7065 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7074 #endif /* not subprocesses */
7076 /* The following functions are needed even if async subprocesses are
7077 not supported. Some of them are no-op stubs in that case. */
7079 /* Add DESC to the set of keyboard input descriptors. */
7082 add_keyboard_wait_descriptor (int desc
)
7084 #ifdef subprocesses /* actually means "not MSDOS" */
7085 FD_SET (desc
, &input_wait_mask
);
7086 FD_SET (desc
, &non_process_wait_mask
);
7087 if (desc
> max_input_desc
)
7088 max_input_desc
= desc
;
7092 /* From now on, do not expect DESC to give keyboard input. */
7095 delete_keyboard_wait_descriptor (int desc
)
7099 int lim
= max_input_desc
;
7101 FD_CLR (desc
, &input_wait_mask
);
7102 FD_CLR (desc
, &non_process_wait_mask
);
7104 if (desc
== max_input_desc
)
7105 for (fd
= 0; fd
< lim
; fd
++)
7106 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
7107 max_input_desc
= fd
;
7111 /* Setup coding systems of PROCESS. */
7114 setup_process_coding_systems (Lisp_Object process
)
7117 struct Lisp_Process
*p
= XPROCESS (process
);
7119 int outch
= p
->outfd
;
7120 Lisp_Object coding_system
;
7122 if (inch
< 0 || outch
< 0)
7125 if (!proc_decode_coding_system
[inch
])
7126 proc_decode_coding_system
[inch
]
7127 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
7128 coding_system
= p
->decode_coding_system
;
7129 if (! NILP (p
->filter
))
7131 else if (BUFFERP (p
->buffer
))
7133 if (NILP (BVAR (XBUFFER (p
->buffer
), enable_multibyte_characters
)))
7134 coding_system
= raw_text_coding_system (coding_system
);
7136 setup_coding_system (coding_system
, proc_decode_coding_system
[inch
]);
7138 if (!proc_encode_coding_system
[outch
])
7139 proc_encode_coding_system
[outch
]
7140 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
7141 setup_coding_system (p
->encode_coding_system
,
7142 proc_encode_coding_system
[outch
]);
7146 /* Close all descriptors currently in use for communication
7147 with subprocess. This is used in a newly-forked subprocess
7148 to get rid of irrelevant descriptors. */
7151 close_process_descs (void)
7155 for (i
= 0; i
< MAXDESC
; i
++)
7157 Lisp_Object process
;
7158 process
= chan_process
[i
];
7159 if (!NILP (process
))
7161 int in
= XPROCESS (process
)->infd
;
7162 int out
= XPROCESS (process
)->outfd
;
7165 if (out
>= 0 && in
!= out
)
7172 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7173 doc
: /* Return the (or a) process associated with BUFFER.
7174 BUFFER may be a buffer or the name of one. */)
7175 (register Lisp_Object buffer
)
7178 register Lisp_Object buf
, tail
, proc
;
7180 if (NILP (buffer
)) return Qnil
;
7181 buf
= Fget_buffer (buffer
);
7182 if (NILP (buf
)) return Qnil
;
7184 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7186 proc
= Fcdr (XCAR (tail
));
7187 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
7190 #endif /* subprocesses */
7194 DEFUN ("process-inherit-coding-system-flag",
7195 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7197 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
7198 If this flag is t, `buffer-file-coding-system' of the buffer
7199 associated with PROCESS will inherit the coding system used to decode
7200 the process output. */)
7201 (register Lisp_Object process
)
7204 CHECK_PROCESS (process
);
7205 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
7207 /* Ignore the argument and return the value of
7208 inherit-process-coding-system. */
7209 return inherit_process_coding_system
? Qt
: Qnil
;
7213 /* Kill all processes associated with `buffer'.
7214 If `buffer' is nil, kill all processes */
7217 kill_buffer_processes (Lisp_Object buffer
)
7220 Lisp_Object tail
, proc
;
7222 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7224 proc
= XCDR (XCAR (tail
));
7226 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
7228 if (NETCONN_P (proc
) || SERIALCONN_P (proc
))
7229 Fdelete_process (proc
);
7230 else if (XPROCESS (proc
)->infd
>= 0)
7231 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
7234 #else /* subprocesses */
7235 /* Since we have no subprocesses, this does nothing. */
7236 #endif /* subprocesses */
7239 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
7241 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
7242 This is intended for use by asynchronous process output filters and sentinels. */)
7246 return (waiting_for_user_input_p
? Qt
: Qnil
);
7252 /* Stop reading input from keyboard sources. */
7255 hold_keyboard_input (void)
7260 /* Resume reading input from keyboard sources. */
7263 unhold_keyboard_input (void)
7268 /* Return non-zero if keyboard input is on hold, zero otherwise. */
7271 kbd_on_hold_p (void)
7273 return kbd_is_on_hold
;
7277 /* Enumeration of and access to system processes a-la ps(1). */
7279 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
7281 doc
: /* Return a list of numerical process IDs of all running processes.
7282 If this functionality is unsupported, return nil.
7284 See `process-attributes' for getting attributes of a process given its ID. */)
7287 return list_system_processes ();
7290 DEFUN ("process-attributes", Fprocess_attributes
,
7291 Sprocess_attributes
, 1, 1, 0,
7292 doc
: /* Return attributes of the process given by its PID, a number.
7294 Value is an alist where each element is a cons cell of the form
7298 If this functionality is unsupported, the value is nil.
7300 See `list-system-processes' for getting a list of all process IDs.
7302 The KEYs of the attributes that this function may return are listed
7303 below, together with the type of the associated VALUE (in parentheses).
7304 Not all platforms support all of these attributes; unsupported
7305 attributes will not appear in the returned alist.
7306 Unless explicitly indicated otherwise, numbers can have either
7307 integer or floating point values.
7309 euid -- Effective user User ID of the process (number)
7310 user -- User name corresponding to euid (string)
7311 egid -- Effective user Group ID of the process (number)
7312 group -- Group name corresponding to egid (string)
7313 comm -- Command name (executable name only) (string)
7314 state -- Process state code, such as "S", "R", or "T" (string)
7315 ppid -- Parent process ID (number)
7316 pgrp -- Process group ID (number)
7317 sess -- Session ID, i.e. process ID of session leader (number)
7318 ttname -- Controlling tty name (string)
7319 tpgid -- ID of foreground process group on the process's tty (number)
7320 minflt -- number of minor page faults (number)
7321 majflt -- number of major page faults (number)
7322 cminflt -- cumulative number of minor page faults (number)
7323 cmajflt -- cumulative number of major page faults (number)
7324 utime -- user time used by the process, in the (HIGH LOW USEC) format
7325 stime -- system time used by the process, in the (HIGH LOW USEC) format
7326 time -- sum of utime and stime, in the (HIGH LOW USEC) format
7327 cutime -- user time used by the process and its children, (HIGH LOW USEC)
7328 cstime -- system time used by the process and its children, (HIGH LOW USEC)
7329 ctime -- sum of cutime and cstime, in the (HIGH LOW USEC) format
7330 pri -- priority of the process (number)
7331 nice -- nice value of the process (number)
7332 thcount -- process thread count (number)
7333 start -- time the process started, in the (HIGH LOW USEC) format
7334 vsize -- virtual memory size of the process in KB's (number)
7335 rss -- resident set size of the process in KB's (number)
7336 etime -- elapsed time the process is running, in (HIGH LOW USEC) format
7337 pcpu -- percents of CPU time used by the process (floating-point number)
7338 pmem -- percents of total physical memory used by process's resident set
7339 (floating-point number)
7340 args -- command line which invoked the process (string). */)
7343 return system_process_attributes (pid
);
7353 inhibit_sentinels
= 0;
7357 if (! noninteractive
|| initialized
)
7359 signal (SIGCHLD
, sigchld_handler
);
7362 FD_ZERO (&input_wait_mask
);
7363 FD_ZERO (&non_keyboard_wait_mask
);
7364 FD_ZERO (&non_process_wait_mask
);
7365 FD_ZERO (&write_mask
);
7366 max_process_desc
= 0;
7367 memset (fd_callback_info
, 0, sizeof (fd_callback_info
));
7369 #ifdef NON_BLOCKING_CONNECT
7370 FD_ZERO (&connect_wait_mask
);
7371 num_pending_connects
= 0;
7374 #ifdef ADAPTIVE_READ_BUFFERING
7375 process_output_delay_count
= 0;
7376 process_output_skip
= 0;
7379 /* Don't do this, it caused infinite select loops. The display
7380 method should call add_keyboard_wait_descriptor on stdin if it
7383 FD_SET (0, &input_wait_mask
);
7386 Vprocess_alist
= Qnil
;
7388 deleted_pid_list
= Qnil
;
7390 for (i
= 0; i
< MAXDESC
; i
++)
7392 chan_process
[i
] = Qnil
;
7393 proc_buffered_char
[i
] = -1;
7395 memset (proc_decode_coding_system
, 0, sizeof proc_decode_coding_system
);
7396 memset (proc_encode_coding_system
, 0, sizeof proc_encode_coding_system
);
7397 #ifdef DATAGRAM_SOCKETS
7398 memset (datagram_address
, 0, sizeof datagram_address
);
7402 Lisp_Object subfeatures
= Qnil
;
7403 const struct socket_options
*sopt
;
7405 #define ADD_SUBFEATURE(key, val) \
7406 subfeatures = pure_cons (pure_cons (key, pure_cons (val, Qnil)), subfeatures)
7408 #ifdef NON_BLOCKING_CONNECT
7409 ADD_SUBFEATURE (QCnowait
, Qt
);
7411 #ifdef DATAGRAM_SOCKETS
7412 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7414 #ifdef HAVE_SEQPACKET
7415 ADD_SUBFEATURE (QCtype
, Qseqpacket
);
7417 #ifdef HAVE_LOCAL_SOCKETS
7418 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7420 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7422 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7424 #ifdef HAVE_GETSOCKNAME
7425 ADD_SUBFEATURE (QCservice
, Qt
);
7427 #if defined(O_NONBLOCK) || defined(O_NDELAY)
7428 ADD_SUBFEATURE (QCserver
, Qt
);
7431 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7432 subfeatures
= pure_cons (intern_c_string (sopt
->name
), subfeatures
);
7434 Fprovide (intern_c_string ("make-network-process"), subfeatures
);
7437 #if defined (DARWIN_OS)
7438 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7439 processes. As such, we only change the default value. */
7442 const char *release
= get_operating_system_release ();
7443 if (!release
|| !release
[0] || (release
[0] < MIN_PTY_KERNEL_VERSION
7444 && release
[1] == '.')) {
7445 Vprocess_connection_type
= Qnil
;
7449 #endif /* subprocesses */
7454 syms_of_process (void)
7458 Qprocessp
= intern_c_string ("processp");
7459 staticpro (&Qprocessp
);
7460 Qrun
= intern_c_string ("run");
7462 Qstop
= intern_c_string ("stop");
7464 Qsignal
= intern_c_string ("signal");
7465 staticpro (&Qsignal
);
7467 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7470 Qexit = intern_c_string ("exit");
7471 staticpro (&Qexit); */
7473 Qopen
= intern_c_string ("open");
7475 Qclosed
= intern_c_string ("closed");
7476 staticpro (&Qclosed
);
7477 Qconnect
= intern_c_string ("connect");
7478 staticpro (&Qconnect
);
7479 Qfailed
= intern_c_string ("failed");
7480 staticpro (&Qfailed
);
7481 Qlisten
= intern_c_string ("listen");
7482 staticpro (&Qlisten
);
7483 Qlocal
= intern_c_string ("local");
7484 staticpro (&Qlocal
);
7485 Qipv4
= intern_c_string ("ipv4");
7488 Qipv6
= intern_c_string ("ipv6");
7491 Qdatagram
= intern_c_string ("datagram");
7492 staticpro (&Qdatagram
);
7493 Qseqpacket
= intern_c_string ("seqpacket");
7494 staticpro (&Qseqpacket
);
7496 QCport
= intern_c_string (":port");
7497 staticpro (&QCport
);
7498 QCspeed
= intern_c_string (":speed");
7499 staticpro (&QCspeed
);
7500 QCprocess
= intern_c_string (":process");
7501 staticpro (&QCprocess
);
7503 QCbytesize
= intern_c_string (":bytesize");
7504 staticpro (&QCbytesize
);
7505 QCstopbits
= intern_c_string (":stopbits");
7506 staticpro (&QCstopbits
);
7507 QCparity
= intern_c_string (":parity");
7508 staticpro (&QCparity
);
7509 Qodd
= intern_c_string ("odd");
7511 Qeven
= intern_c_string ("even");
7513 QCflowcontrol
= intern_c_string (":flowcontrol");
7514 staticpro (&QCflowcontrol
);
7515 Qhw
= intern_c_string ("hw");
7517 Qsw
= intern_c_string ("sw");
7519 QCsummary
= intern_c_string (":summary");
7520 staticpro (&QCsummary
);
7522 Qreal
= intern_c_string ("real");
7524 Qnetwork
= intern_c_string ("network");
7525 staticpro (&Qnetwork
);
7526 Qserial
= intern_c_string ("serial");
7527 staticpro (&Qserial
);
7528 QCbuffer
= intern_c_string (":buffer");
7529 staticpro (&QCbuffer
);
7530 QChost
= intern_c_string (":host");
7531 staticpro (&QChost
);
7532 QCservice
= intern_c_string (":service");
7533 staticpro (&QCservice
);
7534 QClocal
= intern_c_string (":local");
7535 staticpro (&QClocal
);
7536 QCremote
= intern_c_string (":remote");
7537 staticpro (&QCremote
);
7538 QCcoding
= intern_c_string (":coding");
7539 staticpro (&QCcoding
);
7540 QCserver
= intern_c_string (":server");
7541 staticpro (&QCserver
);
7542 QCnowait
= intern_c_string (":nowait");
7543 staticpro (&QCnowait
);
7544 QCsentinel
= intern_c_string (":sentinel");
7545 staticpro (&QCsentinel
);
7546 QClog
= intern_c_string (":log");
7548 QCnoquery
= intern_c_string (":noquery");
7549 staticpro (&QCnoquery
);
7550 QCstop
= intern_c_string (":stop");
7551 staticpro (&QCstop
);
7552 QCoptions
= intern_c_string (":options");
7553 staticpro (&QCoptions
);
7554 QCplist
= intern_c_string (":plist");
7555 staticpro (&QCplist
);
7557 Qlast_nonmenu_event
= intern_c_string ("last-nonmenu-event");
7558 staticpro (&Qlast_nonmenu_event
);
7560 staticpro (&Vprocess_alist
);
7562 staticpro (&deleted_pid_list
);
7565 #endif /* subprocesses */
7567 QCname
= intern_c_string (":name");
7568 staticpro (&QCname
);
7569 QCtype
= intern_c_string (":type");
7570 staticpro (&QCtype
);
7572 Qeuid
= intern_c_string ("euid");
7574 Qegid
= intern_c_string ("egid");
7576 Quser
= intern_c_string ("user");
7578 Qgroup
= intern_c_string ("group");
7579 staticpro (&Qgroup
);
7580 Qcomm
= intern_c_string ("comm");
7582 Qstate
= intern_c_string ("state");
7583 staticpro (&Qstate
);
7584 Qppid
= intern_c_string ("ppid");
7586 Qpgrp
= intern_c_string ("pgrp");
7588 Qsess
= intern_c_string ("sess");
7590 Qttname
= intern_c_string ("ttname");
7591 staticpro (&Qttname
);
7592 Qtpgid
= intern_c_string ("tpgid");
7593 staticpro (&Qtpgid
);
7594 Qminflt
= intern_c_string ("minflt");
7595 staticpro (&Qminflt
);
7596 Qmajflt
= intern_c_string ("majflt");
7597 staticpro (&Qmajflt
);
7598 Qcminflt
= intern_c_string ("cminflt");
7599 staticpro (&Qcminflt
);
7600 Qcmajflt
= intern_c_string ("cmajflt");
7601 staticpro (&Qcmajflt
);
7602 Qutime
= intern_c_string ("utime");
7603 staticpro (&Qutime
);
7604 Qstime
= intern_c_string ("stime");
7605 staticpro (&Qstime
);
7606 Qtime
= intern_c_string ("time");
7608 Qcutime
= intern_c_string ("cutime");
7609 staticpro (&Qcutime
);
7610 Qcstime
= intern_c_string ("cstime");
7611 staticpro (&Qcstime
);
7612 Qctime
= intern_c_string ("ctime");
7613 staticpro (&Qctime
);
7614 Qpri
= intern_c_string ("pri");
7616 Qnice
= intern_c_string ("nice");
7618 Qthcount
= intern_c_string ("thcount");
7619 staticpro (&Qthcount
);
7620 Qstart
= intern_c_string ("start");
7621 staticpro (&Qstart
);
7622 Qvsize
= intern_c_string ("vsize");
7623 staticpro (&Qvsize
);
7624 Qrss
= intern_c_string ("rss");
7626 Qetime
= intern_c_string ("etime");
7627 staticpro (&Qetime
);
7628 Qpcpu
= intern_c_string ("pcpu");
7630 Qpmem
= intern_c_string ("pmem");
7632 Qargs
= intern_c_string ("args");
7635 DEFVAR_BOOL ("delete-exited-processes", delete_exited_processes
,
7636 doc
: /* *Non-nil means delete processes immediately when they exit.
7637 A value of nil means don't delete them until `list-processes' is run. */);
7639 delete_exited_processes
= 1;
7642 DEFVAR_LISP ("process-connection-type", Vprocess_connection_type
,
7643 doc
: /* Control type of device used to communicate with subprocesses.
7644 Values are nil to use a pipe, or t or `pty' to use a pty.
7645 The value has no effect if the system has no ptys or if all ptys are busy:
7646 then a pipe is used in any case.
7647 The value takes effect when `start-process' is called. */);
7648 Vprocess_connection_type
= Qt
;
7650 #ifdef ADAPTIVE_READ_BUFFERING
7651 DEFVAR_LISP ("process-adaptive-read-buffering", Vprocess_adaptive_read_buffering
,
7652 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7653 On some systems, when Emacs reads the output from a subprocess, the output data
7654 is read in very small blocks, potentially resulting in very poor performance.
7655 This behavior can be remedied to some extent by setting this variable to a
7656 non-nil value, as it will automatically delay reading from such processes, to
7657 allow them to produce more output before Emacs tries to read it.
7658 If the value is t, the delay is reset after each write to the process; any other
7659 non-nil value means that the delay is not reset on write.
7660 The variable takes effect when `start-process' is called. */);
7661 Vprocess_adaptive_read_buffering
= Qt
;
7664 defsubr (&Sprocessp
);
7665 defsubr (&Sget_process
);
7666 defsubr (&Sdelete_process
);
7667 defsubr (&Sprocess_status
);
7668 defsubr (&Sprocess_exit_status
);
7669 defsubr (&Sprocess_id
);
7670 defsubr (&Sprocess_name
);
7671 defsubr (&Sprocess_tty_name
);
7672 defsubr (&Sprocess_command
);
7673 defsubr (&Sset_process_buffer
);
7674 defsubr (&Sprocess_buffer
);
7675 defsubr (&Sprocess_mark
);
7676 defsubr (&Sset_process_filter
);
7677 defsubr (&Sprocess_filter
);
7678 defsubr (&Sset_process_sentinel
);
7679 defsubr (&Sprocess_sentinel
);
7680 defsubr (&Sset_process_window_size
);
7681 defsubr (&Sset_process_inherit_coding_system_flag
);
7682 defsubr (&Sset_process_query_on_exit_flag
);
7683 defsubr (&Sprocess_query_on_exit_flag
);
7684 defsubr (&Sprocess_contact
);
7685 defsubr (&Sprocess_plist
);
7686 defsubr (&Sset_process_plist
);
7687 defsubr (&Slist_processes
);
7688 defsubr (&Sprocess_list
);
7689 defsubr (&Sstart_process
);
7690 defsubr (&Sserial_process_configure
);
7691 defsubr (&Smake_serial_process
);
7692 defsubr (&Sset_network_process_option
);
7693 defsubr (&Smake_network_process
);
7694 defsubr (&Sformat_network_address
);
7695 #if defined(HAVE_NET_IF_H)
7697 defsubr (&Snetwork_interface_list
);
7699 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
7700 defsubr (&Snetwork_interface_info
);
7702 #endif /* defined(HAVE_NET_IF_H) */
7703 #ifdef DATAGRAM_SOCKETS
7704 defsubr (&Sprocess_datagram_address
);
7705 defsubr (&Sset_process_datagram_address
);
7707 defsubr (&Saccept_process_output
);
7708 defsubr (&Sprocess_send_region
);
7709 defsubr (&Sprocess_send_string
);
7710 defsubr (&Sinterrupt_process
);
7711 defsubr (&Skill_process
);
7712 defsubr (&Squit_process
);
7713 defsubr (&Sstop_process
);
7714 defsubr (&Scontinue_process
);
7715 defsubr (&Sprocess_running_child_p
);
7716 defsubr (&Sprocess_send_eof
);
7717 defsubr (&Ssignal_process
);
7718 defsubr (&Swaiting_for_user_input_p
);
7719 defsubr (&Sprocess_type
);
7720 defsubr (&Sset_process_coding_system
);
7721 defsubr (&Sprocess_coding_system
);
7722 defsubr (&Sset_process_filter_multibyte
);
7723 defsubr (&Sprocess_filter_multibyte_p
);
7725 #endif /* subprocesses */
7727 defsubr (&Sget_buffer_process
);
7728 defsubr (&Sprocess_inherit_coding_system_flag
);
7729 defsubr (&Slist_system_processes
);
7730 defsubr (&Sprocess_attributes
);