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. */
2728 make_serial_process_unwind (Lisp_Object proc
)
2730 if (!PROCESSP (proc
))
2732 remove_process (proc
);
2736 DEFUN ("make-serial-process", Fmake_serial_process
, Smake_serial_process
,
2738 doc
: /* Create and return a serial port process.
2740 In Emacs, serial port connections are represented by process objects,
2741 so input and output work as for subprocesses, and `delete-process'
2742 closes a serial port connection. However, a serial process has no
2743 process id, it cannot be signaled, and the status codes are different
2744 from normal processes.
2746 `make-serial-process' creates a process and a buffer, on which you
2747 probably want to use `process-send-string'. Try \\[serial-term] for
2748 an interactive terminal. See below for examples.
2750 Arguments are specified as keyword/argument pairs. The following
2751 arguments are defined:
2753 :port PORT -- (mandatory) PORT is the path or name of the serial port.
2754 For example, this could be "/dev/ttyS0" on Unix. On Windows, this
2755 could be "COM1", or "\\\\.\\COM10" for ports higher than COM9 (double
2756 the backslashes in strings).
2758 :speed SPEED -- (mandatory) is handled by `serial-process-configure',
2759 which is called by `make-serial-process'.
2761 :name NAME -- NAME is the name of the process. If NAME is not given,
2762 the value of PORT is used.
2764 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2765 with the process. Process output goes at the end of that buffer,
2766 unless you specify an output stream or filter function to handle the
2767 output. If BUFFER is not given, the value of NAME is used.
2769 :coding CODING -- If CODING is a symbol, it specifies the coding
2770 system used for both reading and writing for this process. If CODING
2771 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2772 ENCODING is used for writing.
2774 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2775 the process is running. If BOOL is not given, query before exiting.
2777 :stop BOOL -- Start process in the `stopped' state if BOOL is non-nil.
2778 In the stopped state, a serial process does not accept incoming data,
2779 but you can send outgoing data. The stopped state is cleared by
2780 `continue-process' and set by `stop-process'.
2782 :filter FILTER -- Install FILTER as the process filter.
2784 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2786 :plist PLIST -- Install PLIST as the initial plist of the process.
2793 -- These arguments are handled by `serial-process-configure', which is
2794 called by `make-serial-process'.
2796 The original argument list, possibly modified by later configuration,
2797 is available via the function `process-contact'.
2801 \(make-serial-process :port "/dev/ttyS0" :speed 9600)
2803 \(make-serial-process :port "COM1" :speed 115200 :stopbits 2)
2805 \(make-serial-process :port "\\\\.\\COM13" :speed 1200 :bytesize 7 :parity 'odd)
2807 \(make-serial-process :port "/dev/tty.BlueConsole-SPP-1" :speed nil)
2809 usage: (make-serial-process &rest ARGS) */)
2810 (int nargs
, Lisp_Object
*args
)
2813 Lisp_Object proc
, contact
, port
;
2814 struct Lisp_Process
*p
;
2815 struct gcpro gcpro1
;
2816 Lisp_Object name
, buffer
;
2817 Lisp_Object tem
, val
;
2818 int specpdl_count
= -1;
2823 contact
= Flist (nargs
, args
);
2826 port
= Fplist_get (contact
, QCport
);
2828 error ("No port specified");
2829 CHECK_STRING (port
);
2831 if (NILP (Fplist_member (contact
, QCspeed
)))
2832 error (":speed not specified");
2833 if (!NILP (Fplist_get (contact
, QCspeed
)))
2834 CHECK_NUMBER (Fplist_get (contact
, QCspeed
));
2836 name
= Fplist_get (contact
, QCname
);
2839 CHECK_STRING (name
);
2840 proc
= make_process (name
);
2841 specpdl_count
= SPECPDL_INDEX ();
2842 record_unwind_protect (make_serial_process_unwind
, proc
);
2843 p
= XPROCESS (proc
);
2845 fd
= serial_open (SSDATA (port
));
2848 if (fd
> max_process_desc
)
2849 max_process_desc
= fd
;
2850 chan_process
[fd
] = proc
;
2852 buffer
= Fplist_get (contact
, QCbuffer
);
2855 buffer
= Fget_buffer_create (buffer
);
2858 p
->childp
= contact
;
2859 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
2861 p
->sentinel
= Fplist_get (contact
, QCsentinel
);
2862 p
->filter
= Fplist_get (contact
, QCfilter
);
2864 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
2865 p
->kill_without_query
= 1;
2866 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
2870 if (!EQ (p
->command
, Qt
))
2872 FD_SET (fd
, &input_wait_mask
);
2873 FD_SET (fd
, &non_keyboard_wait_mask
);
2876 if (BUFFERP (buffer
))
2878 set_marker_both (p
->mark
, buffer
,
2879 BUF_ZV (XBUFFER (buffer
)),
2880 BUF_ZV_BYTE (XBUFFER (buffer
)));
2883 tem
= Fplist_member (contact
, QCcoding
);
2884 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
2890 val
= XCAR (XCDR (tem
));
2894 else if (!NILP (Vcoding_system_for_read
))
2895 val
= Vcoding_system_for_read
;
2896 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2897 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2899 p
->decode_coding_system
= val
;
2904 val
= XCAR (XCDR (tem
));
2908 else if (!NILP (Vcoding_system_for_write
))
2909 val
= Vcoding_system_for_write
;
2910 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2911 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2913 p
->encode_coding_system
= val
;
2915 setup_process_coding_systems (proc
);
2916 p
->decoding_buf
= empty_unibyte_string
;
2917 p
->decoding_carryover
= 0;
2918 p
->encoding_buf
= empty_unibyte_string
;
2919 p
->inherit_coding_system_flag
2920 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
2922 Fserial_process_configure (nargs
, args
);
2924 specpdl_ptr
= specpdl
+ specpdl_count
;
2930 /* Create a network stream/datagram client/server process. Treated
2931 exactly like a normal process when reading and writing. Primary
2932 differences are in status display and process deletion. A network
2933 connection has no PID; you cannot signal it. All you can do is
2934 stop/continue it and deactivate/close it via delete-process */
2936 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2938 doc
: /* Create and return a network server or client process.
2940 In Emacs, network connections are represented by process objects, so
2941 input and output work as for subprocesses and `delete-process' closes
2942 a network connection. However, a network process has no process id,
2943 it cannot be signaled, and the status codes are different from normal
2946 Arguments are specified as keyword/argument pairs. The following
2947 arguments are defined:
2949 :name NAME -- NAME is name for process. It is modified if necessary
2952 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2953 with the process. Process output goes at end of that buffer, unless
2954 you specify an output stream or filter function to handle the output.
2955 BUFFER may be also nil, meaning that this process is not associated
2958 :host HOST -- HOST is name of the host to connect to, or its IP
2959 address. The symbol `local' specifies the local host. If specified
2960 for a server process, it must be a valid name or address for the local
2961 host, and only clients connecting to that address will be accepted.
2963 :service SERVICE -- SERVICE is name of the service desired, or an
2964 integer specifying a port number to connect to. If SERVICE is t,
2965 a random port number is selected for the server. (If Emacs was
2966 compiled with getaddrinfo, a port number can also be specified as a
2967 string, e.g. "80", as well as an integer. This is not portable.)
2969 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2970 stream type connection, `datagram' creates a datagram type connection,
2971 `seqpacket' creates a reliable datagram connection.
2973 :family FAMILY -- FAMILY is the address (and protocol) family for the
2974 service specified by HOST and SERVICE. The default (nil) is to use
2975 whatever address family (IPv4 or IPv6) that is defined for the host
2976 and port number specified by HOST and SERVICE. Other address families
2978 local -- for a local (i.e. UNIX) address specified by SERVICE.
2979 ipv4 -- use IPv4 address family only.
2980 ipv6 -- use IPv6 address family only.
2982 :local ADDRESS -- ADDRESS is the local address used for the connection.
2983 This parameter is ignored when opening a client process. When specified
2984 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2986 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2987 connection. This parameter is ignored when opening a stream server
2988 process. For a datagram server process, it specifies the initial
2989 setting of the remote datagram address. When specified for a client
2990 process, the FAMILY, HOST, and SERVICE args are ignored.
2992 The format of ADDRESS depends on the address family:
2993 - An IPv4 address is represented as an vector of integers [A B C D P]
2994 corresponding to numeric IP address A.B.C.D and port number P.
2995 - A local address is represented as a string with the address in the
2996 local address space.
2997 - An "unsupported family" address is represented by a cons (F . AV)
2998 where F is the family number and AV is a vector containing the socket
2999 address data with one element per address data byte. Do not rely on
3000 this format in portable code, as it may depend on implementation
3001 defined constants, data sizes, and data structure alignment.
3003 :coding CODING -- If CODING is a symbol, it specifies the coding
3004 system used for both reading and writing for this process. If CODING
3005 is a cons (DECODING . ENCODING), DECODING is used for reading, and
3006 ENCODING is used for writing.
3008 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
3009 return without waiting for the connection to complete; instead, the
3010 sentinel function will be called with second arg matching "open" (if
3011 successful) or "failed" when the connect completes. Default is to use
3012 a blocking connect (i.e. wait) for stream type connections.
3014 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
3015 running when Emacs is exited.
3017 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
3018 In the stopped state, a server process does not accept new
3019 connections, and a client process does not handle incoming traffic.
3020 The stopped state is cleared by `continue-process' and set by
3023 :filter FILTER -- Install FILTER as the process filter.
3025 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
3026 process filter are multibyte, otherwise they are unibyte.
3027 If this keyword is not specified, the strings are multibyte if
3028 `default-enable-multibyte-characters' is non-nil.
3030 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
3032 :log LOG -- Install LOG as the server process log function. This
3033 function is called when the server accepts a network connection from a
3034 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
3035 is the server process, CLIENT is the new process for the connection,
3036 and MESSAGE is a string.
3038 :plist PLIST -- Install PLIST as the new process' initial plist.
3040 :server QLEN -- if QLEN is non-nil, create a server process for the
3041 specified FAMILY, SERVICE, and connection type (stream or datagram).
3042 If QLEN is an integer, it is used as the max. length of the server's
3043 pending connection queue (also known as the backlog); the default
3044 queue length is 5. Default is to create a client process.
3046 The following network options can be specified for this connection:
3048 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
3049 :dontroute BOOL -- Only send to directly connected hosts.
3050 :keepalive BOOL -- Send keep-alive messages on network stream.
3051 :linger BOOL or TIMEOUT -- Send queued messages before closing.
3052 :oobinline BOOL -- Place out-of-band data in receive data stream.
3053 :priority INT -- Set protocol defined priority for sent packets.
3054 :reuseaddr BOOL -- Allow reusing a recently used local address
3055 (this is allowed by default for a server process).
3056 :bindtodevice NAME -- bind to interface NAME. Using this may require
3057 special privileges on some systems.
3059 Consult the relevant system programmer's manual pages for more
3060 information on using these options.
3063 A server process will listen for and accept connections from clients.
3064 When a client connection is accepted, a new network process is created
3065 for the connection with the following parameters:
3067 - The client's process name is constructed by concatenating the server
3068 process' NAME and a client identification string.
3069 - If the FILTER argument is non-nil, the client process will not get a
3070 separate process buffer; otherwise, the client's process buffer is a newly
3071 created buffer named after the server process' BUFFER name or process
3072 NAME concatenated with the client identification string.
3073 - The connection type and the process filter and sentinel parameters are
3074 inherited from the server process' TYPE, FILTER and SENTINEL.
3075 - The client process' contact info is set according to the client's
3076 addressing information (typically an IP address and a port number).
3077 - The client process' plist is initialized from the server's plist.
3079 Notice that the FILTER and SENTINEL args are never used directly by
3080 the server process. Also, the BUFFER argument is not used directly by
3081 the server process, but via the optional :log function, accepted (and
3082 failed) connections may be logged in the server process' buffer.
3084 The original argument list, modified with the actual connection
3085 information, is available via the `process-contact' function.
3087 usage: (make-network-process &rest ARGS) */)
3088 (int nargs
, Lisp_Object
*args
)
3091 Lisp_Object contact
;
3092 struct Lisp_Process
*p
;
3093 #ifdef HAVE_GETADDRINFO
3094 struct addrinfo ai
, *res
, *lres
;
3095 struct addrinfo hints
;
3096 const char *portstring
;
3098 #else /* HAVE_GETADDRINFO */
3099 struct _emacs_addrinfo
3105 struct sockaddr
*ai_addr
;
3106 struct _emacs_addrinfo
*ai_next
;
3108 #endif /* HAVE_GETADDRINFO */
3109 struct sockaddr_in address_in
;
3110 #ifdef HAVE_LOCAL_SOCKETS
3111 struct sockaddr_un address_un
;
3116 int s
= -1, outch
, inch
;
3117 struct gcpro gcpro1
;
3118 int count
= SPECPDL_INDEX ();
3120 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
3122 Lisp_Object name
, buffer
, host
, service
, address
;
3123 Lisp_Object filter
, sentinel
;
3124 int is_non_blocking_client
= 0;
3125 int is_server
= 0, backlog
= 5;
3132 /* Save arguments for process-contact and clone-process. */
3133 contact
= Flist (nargs
, args
);
3137 /* Ensure socket support is loaded if available. */
3138 init_winsock (TRUE
);
3141 /* :type TYPE (nil: stream, datagram */
3142 tem
= Fplist_get (contact
, QCtype
);
3144 socktype
= SOCK_STREAM
;
3145 #ifdef DATAGRAM_SOCKETS
3146 else if (EQ (tem
, Qdatagram
))
3147 socktype
= SOCK_DGRAM
;
3149 #ifdef HAVE_SEQPACKET
3150 else if (EQ (tem
, Qseqpacket
))
3151 socktype
= SOCK_SEQPACKET
;
3154 error ("Unsupported connection type");
3157 tem
= Fplist_get (contact
, QCserver
);
3160 /* Don't support network sockets when non-blocking mode is
3161 not available, since a blocked Emacs is not useful. */
3162 #if !defined(O_NONBLOCK) && !defined(O_NDELAY)
3163 error ("Network servers not supported");
3167 backlog
= XINT (tem
);
3171 /* Make QCaddress an alias for :local (server) or :remote (client). */
3172 QCaddress
= is_server
? QClocal
: QCremote
;
3175 if (!is_server
&& socktype
!= SOCK_DGRAM
3176 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
3178 #ifndef NON_BLOCKING_CONNECT
3179 error ("Non-blocking connect not supported");
3181 is_non_blocking_client
= 1;
3185 name
= Fplist_get (contact
, QCname
);
3186 buffer
= Fplist_get (contact
, QCbuffer
);
3187 filter
= Fplist_get (contact
, QCfilter
);
3188 sentinel
= Fplist_get (contact
, QCsentinel
);
3190 CHECK_STRING (name
);
3192 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
3193 ai
.ai_socktype
= socktype
;
3198 /* :local ADDRESS or :remote ADDRESS */
3199 address
= Fplist_get (contact
, QCaddress
);
3200 if (!NILP (address
))
3202 host
= service
= Qnil
;
3204 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
3205 error ("Malformed :address");
3206 ai
.ai_family
= family
;
3207 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
3208 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
3212 /* :family FAMILY -- nil (for Inet), local, or integer. */
3213 tem
= Fplist_get (contact
, QCfamily
);
3216 #if defined(HAVE_GETADDRINFO) && defined(AF_INET6)
3222 #ifdef HAVE_LOCAL_SOCKETS
3223 else if (EQ (tem
, Qlocal
))
3227 else if (EQ (tem
, Qipv6
))
3230 else if (EQ (tem
, Qipv4
))
3232 else if (INTEGERP (tem
))
3233 family
= XINT (tem
);
3235 error ("Unknown address family");
3237 ai
.ai_family
= family
;
3239 /* :service SERVICE -- string, integer (port number), or t (random port). */
3240 service
= Fplist_get (contact
, QCservice
);
3242 /* :host HOST -- hostname, ip address, or 'local for localhost. */
3243 host
= Fplist_get (contact
, QChost
);
3246 if (EQ (host
, Qlocal
))
3247 /* Depending on setup, "localhost" may map to different IPv4 and/or
3248 IPv6 addresses, so it's better to be explicit. (Bug#6781) */
3249 host
= build_string ("127.0.0.1");
3250 CHECK_STRING (host
);
3253 #ifdef HAVE_LOCAL_SOCKETS
3254 if (family
== AF_LOCAL
)
3258 message (":family local ignores the :host \"%s\" property",
3260 contact
= Fplist_put (contact
, QChost
, Qnil
);
3263 CHECK_STRING (service
);
3264 memset (&address_un
, 0, sizeof address_un
);
3265 address_un
.sun_family
= AF_LOCAL
;
3266 strncpy (address_un
.sun_path
, SSDATA (service
), sizeof address_un
.sun_path
);
3267 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
3268 ai
.ai_addrlen
= sizeof address_un
;
3273 /* Slow down polling to every ten seconds.
3274 Some kernels have a bug which causes retrying connect to fail
3275 after a connect. Polling can interfere with gethostbyname too. */
3276 #ifdef POLL_FOR_INPUT
3277 if (socktype
!= SOCK_DGRAM
)
3279 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
3280 bind_polling_period (10);
3284 #ifdef HAVE_GETADDRINFO
3285 /* If we have a host, use getaddrinfo to resolve both host and service.
3286 Otherwise, use getservbyname to lookup the service. */
3290 /* SERVICE can either be a string or int.
3291 Convert to a C string for later use by getaddrinfo. */
3292 if (EQ (service
, Qt
))
3294 else if (INTEGERP (service
))
3296 sprintf (portbuf
, "%ld", (long) XINT (service
));
3297 portstring
= portbuf
;
3301 CHECK_STRING (service
);
3302 portstring
= SSDATA (service
);
3307 memset (&hints
, 0, sizeof (hints
));
3309 hints
.ai_family
= family
;
3310 hints
.ai_socktype
= socktype
;
3311 hints
.ai_protocol
= 0;
3313 #ifdef HAVE_RES_INIT
3317 ret
= getaddrinfo (SSDATA (host
), portstring
, &hints
, &res
);
3319 #ifdef HAVE_GAI_STRERROR
3320 error ("%s/%s %s", SSDATA (host
), portstring
, gai_strerror (ret
));
3322 error ("%s/%s getaddrinfo error %d", SSDATA (host
), portstring
, ret
);
3328 #endif /* HAVE_GETADDRINFO */
3330 /* We end up here if getaddrinfo is not defined, or in case no hostname
3331 has been specified (e.g. for a local server process). */
3333 if (EQ (service
, Qt
))
3335 else if (INTEGERP (service
))
3336 port
= htons ((unsigned short) XINT (service
));
3339 struct servent
*svc_info
;
3340 CHECK_STRING (service
);
3341 svc_info
= getservbyname (SSDATA (service
),
3342 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3344 error ("Unknown service: %s", SDATA (service
));
3345 port
= svc_info
->s_port
;
3348 memset (&address_in
, 0, sizeof address_in
);
3349 address_in
.sin_family
= family
;
3350 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3351 address_in
.sin_port
= port
;
3353 #ifndef HAVE_GETADDRINFO
3356 struct hostent
*host_info_ptr
;
3358 /* gethostbyname may fail with TRY_AGAIN, but we don't honour that,
3359 as it may `hang' Emacs for a very long time. */
3363 #ifdef HAVE_RES_INIT
3367 host_info_ptr
= gethostbyname (SDATA (host
));
3372 memcpy (&address_in
.sin_addr
, host_info_ptr
->h_addr
,
3373 host_info_ptr
->h_length
);
3374 family
= host_info_ptr
->h_addrtype
;
3375 address_in
.sin_family
= family
;
3378 /* Attempt to interpret host as numeric inet address */
3380 unsigned long numeric_addr
;
3381 numeric_addr
= inet_addr (SSDATA (host
));
3382 if (numeric_addr
== -1)
3383 error ("Unknown host \"%s\"", SDATA (host
));
3385 memcpy (&address_in
.sin_addr
, &numeric_addr
,
3386 sizeof (address_in
.sin_addr
));
3390 #endif /* not HAVE_GETADDRINFO */
3392 ai
.ai_family
= family
;
3393 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3394 ai
.ai_addrlen
= sizeof address_in
;
3398 /* Do this in case we never enter the for-loop below. */
3399 count1
= SPECPDL_INDEX ();
3402 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3408 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3415 #ifdef DATAGRAM_SOCKETS
3416 if (!is_server
&& socktype
== SOCK_DGRAM
)
3418 #endif /* DATAGRAM_SOCKETS */
3420 #ifdef NON_BLOCKING_CONNECT
3421 if (is_non_blocking_client
)
3424 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3426 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3438 /* Make us close S if quit. */
3439 record_unwind_protect (close_file_unwind
, make_number (s
));
3441 /* Parse network options in the arg list.
3442 We simply ignore anything which isn't a known option (including other keywords).
3443 An error is signaled if setting a known option fails. */
3444 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3445 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3449 /* Configure as a server socket. */
3451 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3452 explicit :reuseaddr key to override this. */
3453 #ifdef HAVE_LOCAL_SOCKETS
3454 if (family
!= AF_LOCAL
)
3456 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3459 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3460 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3463 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3464 report_file_error ("Cannot bind server socket", Qnil
);
3466 #ifdef HAVE_GETSOCKNAME
3467 if (EQ (service
, Qt
))
3469 struct sockaddr_in sa1
;
3470 int len1
= sizeof (sa1
);
3471 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3473 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3474 service
= make_number (ntohs (sa1
.sin_port
));
3475 contact
= Fplist_put (contact
, QCservice
, service
);
3480 if (socktype
!= SOCK_DGRAM
&& listen (s
, backlog
))
3481 report_file_error ("Cannot listen on server socket", Qnil
);
3489 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3492 if (ret
== 0 || xerrno
== EISCONN
)
3494 /* The unwind-protect will be discarded afterwards.
3495 Likewise for immediate_quit. */
3499 #ifdef NON_BLOCKING_CONNECT
3501 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3505 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3512 if (xerrno
== EINTR
)
3514 /* Unlike most other syscalls connect() cannot be called
3515 again. (That would return EALREADY.) The proper way to
3516 wait for completion is select(). */
3523 sc
= select (s
+ 1, (SELECT_TYPE
*)0, &fdset
, (SELECT_TYPE
*)0,
3530 report_file_error ("select failed", Qnil
);
3534 len
= sizeof xerrno
;
3535 eassert (FD_ISSET (s
, &fdset
));
3536 if (getsockopt (s
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &len
) == -1)
3537 report_file_error ("getsockopt failed", Qnil
);
3539 errno
= xerrno
, report_file_error ("error during connect", Qnil
);
3543 #endif /* !WINDOWSNT */
3547 /* Discard the unwind protect closing S. */
3548 specpdl_ptr
= specpdl
+ count1
;
3553 if (xerrno
== EINTR
)
3560 #ifdef DATAGRAM_SOCKETS
3561 if (socktype
== SOCK_DGRAM
)
3563 if (datagram_address
[s
].sa
)
3565 datagram_address
[s
].sa
= (struct sockaddr
*) xmalloc (lres
->ai_addrlen
);
3566 datagram_address
[s
].len
= lres
->ai_addrlen
;
3570 memset (datagram_address
[s
].sa
, 0, lres
->ai_addrlen
);
3571 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3574 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3575 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3576 conv_lisp_to_sockaddr (rfamily
, remote
,
3577 datagram_address
[s
].sa
, rlen
);
3581 memcpy (datagram_address
[s
].sa
, lres
->ai_addr
, lres
->ai_addrlen
);
3584 contact
= Fplist_put (contact
, QCaddress
,
3585 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3586 #ifdef HAVE_GETSOCKNAME
3589 struct sockaddr_in sa1
;
3590 int len1
= sizeof (sa1
);
3591 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3592 contact
= Fplist_put (contact
, QClocal
,
3593 conv_sockaddr_to_lisp ((struct sockaddr
*)&sa1
, len1
));
3600 #ifdef HAVE_GETADDRINFO
3609 /* Discard the unwind protect for closing S, if any. */
3610 specpdl_ptr
= specpdl
+ count1
;
3612 /* Unwind bind_polling_period and request_sigio. */
3613 unbind_to (count
, Qnil
);
3617 /* If non-blocking got this far - and failed - assume non-blocking is
3618 not supported after all. This is probably a wrong assumption, but
3619 the normal blocking calls to open-network-stream handles this error
3621 if (is_non_blocking_client
)
3626 report_file_error ("make server process failed", contact
);
3628 report_file_error ("make client process failed", contact
);
3635 buffer
= Fget_buffer_create (buffer
);
3636 proc
= make_process (name
);
3638 chan_process
[inch
] = proc
;
3641 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3644 fcntl (inch
, F_SETFL
, O_NDELAY
);
3648 p
= XPROCESS (proc
);
3650 p
->childp
= contact
;
3651 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
3655 p
->sentinel
= sentinel
;
3657 p
->log
= Fplist_get (contact
, QClog
);
3658 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3659 p
->kill_without_query
= 1;
3660 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3665 if (is_server
&& socktype
!= SOCK_DGRAM
)
3666 p
->status
= Qlisten
;
3668 /* Make the process marker point into the process buffer (if any). */
3669 if (BUFFERP (buffer
))
3670 set_marker_both (p
->mark
, buffer
,
3671 BUF_ZV (XBUFFER (buffer
)),
3672 BUF_ZV_BYTE (XBUFFER (buffer
)));
3674 #ifdef NON_BLOCKING_CONNECT
3675 if (is_non_blocking_client
)
3677 /* We may get here if connect did succeed immediately. However,
3678 in that case, we still need to signal this like a non-blocking
3680 p
->status
= Qconnect
;
3681 if (!FD_ISSET (inch
, &connect_wait_mask
))
3683 FD_SET (inch
, &connect_wait_mask
);
3684 FD_SET (inch
, &write_mask
);
3685 num_pending_connects
++;
3690 /* A server may have a client filter setting of Qt, but it must
3691 still listen for incoming connects unless it is stopped. */
3692 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3693 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3695 FD_SET (inch
, &input_wait_mask
);
3696 FD_SET (inch
, &non_keyboard_wait_mask
);
3699 if (inch
> max_process_desc
)
3700 max_process_desc
= inch
;
3702 tem
= Fplist_member (contact
, QCcoding
);
3703 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3704 tem
= Qnil
; /* No error message (too late!). */
3707 /* Setup coding systems for communicating with the network stream. */
3708 struct gcpro gcpro1
;
3709 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3710 Lisp_Object coding_systems
= Qt
;
3711 Lisp_Object args
[5], val
;
3715 val
= XCAR (XCDR (tem
));
3719 else if (!NILP (Vcoding_system_for_read
))
3720 val
= Vcoding_system_for_read
;
3721 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
3722 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
3723 /* We dare not decode end-of-line format by setting VAL to
3724 Qraw_text, because the existing Emacs Lisp libraries
3725 assume that they receive bare code including a sequene of
3730 if (NILP (host
) || NILP (service
))
3731 coding_systems
= Qnil
;
3734 args
[0] = Qopen_network_stream
, args
[1] = name
,
3735 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3737 coding_systems
= Ffind_operation_coding_system (5, args
);
3740 if (CONSP (coding_systems
))
3741 val
= XCAR (coding_systems
);
3742 else if (CONSP (Vdefault_process_coding_system
))
3743 val
= XCAR (Vdefault_process_coding_system
);
3747 p
->decode_coding_system
= val
;
3751 val
= XCAR (XCDR (tem
));
3755 else if (!NILP (Vcoding_system_for_write
))
3756 val
= Vcoding_system_for_write
;
3757 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3761 if (EQ (coding_systems
, Qt
))
3763 if (NILP (host
) || NILP (service
))
3764 coding_systems
= Qnil
;
3767 args
[0] = Qopen_network_stream
, args
[1] = name
,
3768 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3770 coding_systems
= Ffind_operation_coding_system (5, args
);
3774 if (CONSP (coding_systems
))
3775 val
= XCDR (coding_systems
);
3776 else if (CONSP (Vdefault_process_coding_system
))
3777 val
= XCDR (Vdefault_process_coding_system
);
3781 p
->encode_coding_system
= val
;
3783 setup_process_coding_systems (proc
);
3785 p
->decoding_buf
= empty_unibyte_string
;
3786 p
->decoding_carryover
= 0;
3787 p
->encoding_buf
= empty_unibyte_string
;
3789 p
->inherit_coding_system_flag
3790 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3797 #if defined(HAVE_NET_IF_H)
3800 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3801 doc
: /* Return an alist of all network interfaces and their network address.
3802 Each element is a cons, the car of which is a string containing the
3803 interface name, and the cdr is the network address in internal
3804 format; see the description of ADDRESS in `make-network-process'. */)
3807 struct ifconf ifconf
;
3808 struct ifreq
*ifreqs
= NULL
;
3813 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3819 buf_size
= ifaces
* sizeof (ifreqs
[0]);
3820 ifreqs
= (struct ifreq
*)xrealloc(ifreqs
, buf_size
);
3827 ifconf
.ifc_len
= buf_size
;
3828 ifconf
.ifc_req
= ifreqs
;
3829 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3835 if (ifconf
.ifc_len
== buf_size
)
3839 ifaces
= ifconf
.ifc_len
/ sizeof (ifreqs
[0]);
3842 while (--ifaces
>= 0)
3844 struct ifreq
*ifq
= &ifreqs
[ifaces
];
3845 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3846 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3848 memcpy (namebuf
, ifq
->ifr_name
, sizeof (ifq
->ifr_name
));
3849 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3850 res
= Fcons (Fcons (build_string (namebuf
),
3851 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3852 sizeof (struct sockaddr
))),
3858 #endif /* SIOCGIFCONF */
3860 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
3864 const char *flag_sym
;
3867 static const struct ifflag_def ifflag_table
[] = {
3871 #ifdef IFF_BROADCAST
3872 { IFF_BROADCAST
, "broadcast" },
3875 { IFF_DEBUG
, "debug" },
3878 { IFF_LOOPBACK
, "loopback" },
3880 #ifdef IFF_POINTOPOINT
3881 { IFF_POINTOPOINT
, "pointopoint" },
3884 { IFF_RUNNING
, "running" },
3887 { IFF_NOARP
, "noarp" },
3890 { IFF_PROMISC
, "promisc" },
3892 #ifdef IFF_NOTRAILERS
3893 { IFF_NOTRAILERS
, "notrailers" },
3896 { IFF_ALLMULTI
, "allmulti" },
3899 { IFF_MASTER
, "master" },
3902 { IFF_SLAVE
, "slave" },
3904 #ifdef IFF_MULTICAST
3905 { IFF_MULTICAST
, "multicast" },
3908 { IFF_PORTSEL
, "portsel" },
3910 #ifdef IFF_AUTOMEDIA
3911 { IFF_AUTOMEDIA
, "automedia" },
3914 { IFF_DYNAMIC
, "dynamic" },
3917 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3920 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3923 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3926 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3929 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3934 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3935 doc
: /* Return information about network interface named IFNAME.
3936 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3937 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3938 NETMASK is the layer 3 network mask, HWADDR is the layer 2 addres, and
3939 FLAGS is the current flags of the interface. */)
3940 (Lisp_Object ifname
)
3943 Lisp_Object res
= Qnil
;
3948 CHECK_STRING (ifname
);
3950 memset (rq
.ifr_name
, 0, sizeof rq
.ifr_name
);
3951 strncpy (rq
.ifr_name
, SDATA (ifname
), sizeof (rq
.ifr_name
));
3953 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3958 #if defined(SIOCGIFFLAGS) && defined(HAVE_STRUCT_IFREQ_IFR_FLAGS)
3959 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3961 int flags
= rq
.ifr_flags
;
3962 const struct ifflag_def
*fp
;
3966 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3968 if (flags
& fp
->flag_bit
)
3970 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3971 flags
-= fp
->flag_bit
;
3974 for (fnum
= 0; flags
&& fnum
< 32; fnum
++)
3976 if (flags
& (1 << fnum
))
3978 elt
= Fcons (make_number (fnum
), elt
);
3983 res
= Fcons (elt
, res
);
3986 #if defined(SIOCGIFHWADDR) && defined(HAVE_STRUCT_IFREQ_IFR_HWADDR)
3987 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3989 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3990 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3994 for (n
= 0; n
< 6; n
++)
3995 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3996 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3999 res
= Fcons (elt
, res
);
4002 #if defined(SIOCGIFNETMASK) && (defined(HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined(HAVE_STRUCT_IFREQ_IFR_ADDR))
4003 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
4006 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
4007 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
4009 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
4013 res
= Fcons (elt
, res
);
4016 #if defined(SIOCGIFBRDADDR) && defined(HAVE_STRUCT_IFREQ_IFR_BROADADDR)
4017 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
4020 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
4023 res
= Fcons (elt
, res
);
4026 #if defined(SIOCGIFADDR) && defined(HAVE_STRUCT_IFREQ_IFR_ADDR)
4027 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
4030 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
4033 res
= Fcons (elt
, res
);
4037 return any
? res
: Qnil
;
4040 #endif /* defined(HAVE_NET_IF_H) */
4042 /* Turn off input and output for process PROC. */
4045 deactivate_process (Lisp_Object proc
)
4047 register int inchannel
, outchannel
;
4048 register struct Lisp_Process
*p
= XPROCESS (proc
);
4050 inchannel
= p
->infd
;
4051 outchannel
= p
->outfd
;
4053 #ifdef ADAPTIVE_READ_BUFFERING
4054 if (p
->read_output_delay
> 0)
4056 if (--process_output_delay_count
< 0)
4057 process_output_delay_count
= 0;
4058 p
->read_output_delay
= 0;
4059 p
->read_output_skip
= 0;
4065 /* Beware SIGCHLD hereabouts. */
4066 flush_pending_output (inchannel
);
4067 emacs_close (inchannel
);
4068 if (outchannel
>= 0 && outchannel
!= inchannel
)
4069 emacs_close (outchannel
);
4073 #ifdef DATAGRAM_SOCKETS
4074 if (DATAGRAM_CHAN_P (inchannel
))
4076 xfree (datagram_address
[inchannel
].sa
);
4077 datagram_address
[inchannel
].sa
= 0;
4078 datagram_address
[inchannel
].len
= 0;
4081 chan_process
[inchannel
] = Qnil
;
4082 FD_CLR (inchannel
, &input_wait_mask
);
4083 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
4084 #ifdef NON_BLOCKING_CONNECT
4085 if (FD_ISSET (inchannel
, &connect_wait_mask
))
4087 FD_CLR (inchannel
, &connect_wait_mask
);
4088 FD_CLR (inchannel
, &write_mask
);
4089 if (--num_pending_connects
< 0)
4093 if (inchannel
== max_process_desc
)
4096 /* We just closed the highest-numbered process input descriptor,
4097 so recompute the highest-numbered one now. */
4098 max_process_desc
= 0;
4099 for (i
= 0; i
< MAXDESC
; i
++)
4100 if (!NILP (chan_process
[i
]))
4101 max_process_desc
= i
;
4107 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
4109 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
4110 It is read into the process' buffers or given to their filter functions.
4111 Non-nil arg PROCESS means do not return until some output has been received
4114 Non-nil second arg SECONDS and third arg MILLISEC are number of seconds
4115 and milliseconds to wait; return after that much time whether or not
4116 there is any subprocess output. If SECONDS is a floating point number,
4117 it specifies a fractional number of seconds to wait.
4118 The MILLISEC argument is obsolete and should be avoided.
4120 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
4121 from PROCESS, suspending reading output from other processes.
4122 If JUST-THIS-ONE is an integer, don't run any timers either.
4123 Return non-nil if we received any output before the timeout expired. */)
4124 (register Lisp_Object process
, Lisp_Object seconds
, Lisp_Object millisec
, Lisp_Object just_this_one
)
4126 int secs
, usecs
= 0;
4128 if (! NILP (process
))
4129 CHECK_PROCESS (process
);
4131 just_this_one
= Qnil
;
4133 if (!NILP (millisec
))
4134 { /* Obsolete calling convention using integers rather than floats. */
4135 CHECK_NUMBER (millisec
);
4137 seconds
= make_float (XINT (millisec
) / 1000.0);
4140 CHECK_NUMBER (seconds
);
4141 seconds
= make_float (XINT (millisec
) / 1000.0 + XINT (seconds
));
4145 if (!NILP (seconds
))
4147 if (INTEGERP (seconds
))
4148 secs
= XINT (seconds
);
4149 else if (FLOATP (seconds
))
4151 double timeout
= XFLOAT_DATA (seconds
);
4152 secs
= (int) timeout
;
4153 usecs
= (int) ((timeout
- (double) secs
) * 1000000);
4156 wrong_type_argument (Qnumberp
, seconds
);
4158 if (secs
< 0 || (secs
== 0 && usecs
== 0))
4159 secs
= -1, usecs
= 0;
4162 secs
= NILP (process
) ? -1 : 0;
4165 (wait_reading_process_output (secs
, usecs
, 0, 0,
4167 !NILP (process
) ? XPROCESS (process
) : NULL
,
4168 NILP (just_this_one
) ? 0 :
4169 !INTEGERP (just_this_one
) ? 1 : -1)
4173 /* Accept a connection for server process SERVER on CHANNEL. */
4175 static int connect_counter
= 0;
4178 server_accept_connection (Lisp_Object server
, int channel
)
4180 Lisp_Object proc
, caller
, name
, buffer
;
4181 Lisp_Object contact
, host
, service
;
4182 struct Lisp_Process
*ps
= XPROCESS (server
);
4183 struct Lisp_Process
*p
;
4187 struct sockaddr_in in
;
4189 struct sockaddr_in6 in6
;
4191 #ifdef HAVE_LOCAL_SOCKETS
4192 struct sockaddr_un un
;
4195 int len
= sizeof saddr
;
4197 s
= accept (channel
, &saddr
.sa
, &len
);
4206 if (code
== EWOULDBLOCK
)
4210 if (!NILP (ps
->log
))
4211 call3 (ps
->log
, server
, Qnil
,
4212 concat3 (build_string ("accept failed with code"),
4213 Fnumber_to_string (make_number (code
)),
4214 build_string ("\n")));
4220 /* Setup a new process to handle the connection. */
4222 /* Generate a unique identification of the caller, and build contact
4223 information for this process. */
4226 switch (saddr
.sa
.sa_family
)
4230 Lisp_Object args
[5];
4231 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4232 args
[0] = build_string ("%d.%d.%d.%d");
4233 args
[1] = make_number (*ip
++);
4234 args
[2] = make_number (*ip
++);
4235 args
[3] = make_number (*ip
++);
4236 args
[4] = make_number (*ip
++);
4237 host
= Fformat (5, args
);
4238 service
= make_number (ntohs (saddr
.in
.sin_port
));
4240 args
[0] = build_string (" <%s:%d>");
4243 caller
= Fformat (3, args
);
4250 Lisp_Object args
[9];
4251 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4253 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4254 for (i
= 0; i
< 8; i
++)
4255 args
[i
+1] = make_number (ntohs (ip6
[i
]));
4256 host
= Fformat (9, args
);
4257 service
= make_number (ntohs (saddr
.in
.sin_port
));
4259 args
[0] = build_string (" <[%s]:%d>");
4262 caller
= Fformat (3, args
);
4267 #ifdef HAVE_LOCAL_SOCKETS
4271 caller
= Fnumber_to_string (make_number (connect_counter
));
4272 caller
= concat3 (build_string (" <"), caller
, build_string (">"));
4276 /* Create a new buffer name for this process if it doesn't have a
4277 filter. The new buffer name is based on the buffer name or
4278 process name of the server process concatenated with the caller
4281 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4285 buffer
= ps
->buffer
;
4287 buffer
= Fbuffer_name (buffer
);
4292 buffer
= concat2 (buffer
, caller
);
4293 buffer
= Fget_buffer_create (buffer
);
4297 /* Generate a unique name for the new server process. Combine the
4298 server process name with the caller identification. */
4300 name
= concat2 (ps
->name
, caller
);
4301 proc
= make_process (name
);
4303 chan_process
[s
] = proc
;
4306 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4309 fcntl (s
, F_SETFL
, O_NDELAY
);
4313 p
= XPROCESS (proc
);
4315 /* Build new contact information for this setup. */
4316 contact
= Fcopy_sequence (ps
->childp
);
4317 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4318 contact
= Fplist_put (contact
, QChost
, host
);
4319 if (!NILP (service
))
4320 contact
= Fplist_put (contact
, QCservice
, service
);
4321 contact
= Fplist_put (contact
, QCremote
,
4322 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4323 #ifdef HAVE_GETSOCKNAME
4325 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4326 contact
= Fplist_put (contact
, QClocal
,
4327 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4330 p
->childp
= contact
;
4331 p
->plist
= Fcopy_sequence (ps
->plist
);
4335 p
->sentinel
= ps
->sentinel
;
4336 p
->filter
= ps
->filter
;
4343 /* Client processes for accepted connections are not stopped initially. */
4344 if (!EQ (p
->filter
, Qt
))
4346 FD_SET (s
, &input_wait_mask
);
4347 FD_SET (s
, &non_keyboard_wait_mask
);
4350 if (s
> max_process_desc
)
4351 max_process_desc
= s
;
4353 /* Setup coding system for new process based on server process.
4354 This seems to be the proper thing to do, as the coding system
4355 of the new process should reflect the settings at the time the
4356 server socket was opened; not the current settings. */
4358 p
->decode_coding_system
= ps
->decode_coding_system
;
4359 p
->encode_coding_system
= ps
->encode_coding_system
;
4360 setup_process_coding_systems (proc
);
4362 p
->decoding_buf
= empty_unibyte_string
;
4363 p
->decoding_carryover
= 0;
4364 p
->encoding_buf
= empty_unibyte_string
;
4366 p
->inherit_coding_system_flag
4367 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4369 if (!NILP (ps
->log
))
4370 call3 (ps
->log
, server
, proc
,
4371 concat3 (build_string ("accept from "),
4372 (STRINGP (host
) ? host
: build_string ("-")),
4373 build_string ("\n")));
4375 if (!NILP (p
->sentinel
))
4376 exec_sentinel (proc
,
4377 concat3 (build_string ("open from "),
4378 (STRINGP (host
) ? host
: build_string ("-")),
4379 build_string ("\n")));
4382 /* This variable is different from waiting_for_input in keyboard.c.
4383 It is used to communicate to a lisp process-filter/sentinel (via the
4384 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4385 for user-input when that process-filter was called.
4386 waiting_for_input cannot be used as that is by definition 0 when
4387 lisp code is being evalled.
4388 This is also used in record_asynch_buffer_change.
4389 For that purpose, this must be 0
4390 when not inside wait_reading_process_output. */
4391 static int waiting_for_user_input_p
;
4394 wait_reading_process_output_unwind (Lisp_Object data
)
4396 waiting_for_user_input_p
= XINT (data
);
4400 /* This is here so breakpoints can be put on it. */
4402 wait_reading_process_output_1 (void)
4406 /* Use a wrapper around select to work around a bug in gdb 5.3.
4407 Normally, the wrapper is optimized away by inlining.
4409 If emacs is stopped inside select, the gdb backtrace doesn't
4410 show the function which called select, so it is practically
4411 impossible to step through wait_reading_process_output. */
4415 select_wrapper (int n
, fd_set
*rfd
, fd_set
*wfd
, fd_set
*xfd
, struct timeval
*tmo
)
4417 return select (n
, rfd
, wfd
, xfd
, tmo
);
4419 #define select select_wrapper
4422 /* Read and dispose of subprocess output while waiting for timeout to
4423 elapse and/or keyboard input to be available.
4426 timeout in seconds, or
4427 zero for no limit, or
4428 -1 means gobble data immediately available but don't wait for any.
4431 an additional duration to wait, measured in microseconds.
4432 If this is nonzero and time_limit is 0, then the timeout
4433 consists of MICROSECS only.
4435 READ_KBD is a lisp value:
4436 0 to ignore keyboard input, or
4437 1 to return when input is available, or
4438 -1 meaning caller will actually read the input, so don't throw to
4439 the quit handler, or
4441 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4442 output that arrives.
4444 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4445 (and gobble terminal input into the buffer if any arrives).
4447 If WAIT_PROC is specified, wait until something arrives from that
4448 process. The return value is true if we read some input from
4451 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4452 (suspending output from other processes). A negative value
4453 means don't run any timers either.
4455 If WAIT_PROC is specified, then the function returns true if we
4456 received input from that process before the timeout elapsed.
4457 Otherwise, return true if we received input from any process. */
4460 wait_reading_process_output (int time_limit
, int microsecs
, int read_kbd
,
4462 Lisp_Object wait_for_cell
,
4463 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
4465 register int channel
, nfds
;
4466 SELECT_TYPE Available
;
4467 SELECT_TYPE Writeok
;
4469 int check_delay
, no_avail
;
4472 EMACS_TIME timeout
, end_time
;
4473 int wait_channel
= -1;
4474 int got_some_input
= 0;
4475 int count
= SPECPDL_INDEX ();
4477 FD_ZERO (&Available
);
4480 if (time_limit
== 0 && microsecs
== 0 && wait_proc
&& !NILP (Vinhibit_quit
)
4481 && !(CONSP (wait_proc
->status
) && EQ (XCAR (wait_proc
->status
), Qexit
)))
4482 message ("Blocking call to accept-process-output with quit inhibited!!");
4484 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4485 if (wait_proc
!= NULL
)
4486 wait_channel
= wait_proc
->infd
;
4488 record_unwind_protect (wait_reading_process_output_unwind
,
4489 make_number (waiting_for_user_input_p
));
4490 waiting_for_user_input_p
= read_kbd
;
4492 /* Since we may need to wait several times,
4493 compute the absolute time to return at. */
4494 if (time_limit
|| microsecs
)
4496 EMACS_GET_TIME (end_time
);
4497 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4498 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4503 int timeout_reduced_for_timers
= 0;
4505 /* If calling from keyboard input, do not quit
4506 since we want to return C-g as an input character.
4507 Otherwise, do pending quit if requested. */
4512 process_pending_signals ();
4515 /* Exit now if the cell we're waiting for became non-nil. */
4516 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4519 /* Compute time from now till when time limit is up */
4520 /* Exit if already run out */
4521 if (time_limit
== -1)
4523 /* -1 specified for timeout means
4524 gobble output available now
4525 but don't wait at all. */
4527 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4529 else if (time_limit
|| microsecs
)
4531 EMACS_GET_TIME (timeout
);
4532 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4533 if (EMACS_TIME_NEG_P (timeout
))
4538 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4541 /* Normally we run timers here.
4542 But not if wait_for_cell; in those cases,
4543 the wait is supposed to be short,
4544 and those callers cannot handle running arbitrary Lisp code here. */
4545 if (NILP (wait_for_cell
)
4546 && just_wait_proc
>= 0)
4548 EMACS_TIME timer_delay
;
4552 int old_timers_run
= timers_run
;
4553 struct buffer
*old_buffer
= current_buffer
;
4554 Lisp_Object old_window
= selected_window
;
4556 timer_delay
= timer_check (1);
4558 /* If a timer has run, this might have changed buffers
4559 an alike. Make read_key_sequence aware of that. */
4560 if (timers_run
!= old_timers_run
4561 && (old_buffer
!= current_buffer
4562 || !EQ (old_window
, selected_window
))
4563 && waiting_for_user_input_p
== -1)
4564 record_asynch_buffer_change ();
4566 if (timers_run
!= old_timers_run
&& do_display
)
4567 /* We must retry, since a timer may have requeued itself
4568 and that could alter the time_delay. */
4569 redisplay_preserve_echo_area (9);
4573 while (!detect_input_pending ());
4575 /* If there is unread keyboard input, also return. */
4577 && requeued_events_pending_p ())
4580 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4582 EMACS_TIME difference
;
4583 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4584 if (EMACS_TIME_NEG_P (difference
))
4586 timeout
= timer_delay
;
4587 timeout_reduced_for_timers
= 1;
4590 /* If time_limit is -1, we are not going to wait at all. */
4591 else if (time_limit
!= -1)
4593 /* This is so a breakpoint can be put here. */
4594 wait_reading_process_output_1 ();
4598 /* Cause C-g and alarm signals to take immediate action,
4599 and cause input available signals to zero out timeout.
4601 It is important that we do this before checking for process
4602 activity. If we get a SIGCHLD after the explicit checks for
4603 process activity, timeout is the only way we will know. */
4605 set_waiting_for_input (&timeout
);
4607 /* If status of something has changed, and no input is
4608 available, notify the user of the change right away. After
4609 this explicit check, we'll let the SIGCHLD handler zap
4610 timeout to get our attention. */
4611 if (update_tick
!= process_tick
)
4616 if (kbd_on_hold_p ())
4619 Atemp
= input_wait_mask
;
4622 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4623 if ((select (max (max_process_desc
, max_input_desc
) + 1,
4625 #ifdef NON_BLOCKING_CONNECT
4626 (num_pending_connects
> 0 ? &Ctemp
: (SELECT_TYPE
*)0),
4630 (SELECT_TYPE
*)0, &timeout
)
4633 /* It's okay for us to do this and then continue with
4634 the loop, since timeout has already been zeroed out. */
4635 clear_waiting_for_input ();
4636 status_notify (NULL
);
4637 if (do_display
) redisplay_preserve_echo_area (13);
4641 /* Don't wait for output from a non-running process. Just
4642 read whatever data has already been received. */
4643 if (wait_proc
&& wait_proc
->raw_status_new
)
4644 update_status (wait_proc
);
4646 && ! EQ (wait_proc
->status
, Qrun
)
4647 && ! EQ (wait_proc
->status
, Qconnect
))
4649 int nread
, total_nread
= 0;
4651 clear_waiting_for_input ();
4652 XSETPROCESS (proc
, wait_proc
);
4654 /* Read data from the process, until we exhaust it. */
4655 while (wait_proc
->infd
>= 0)
4657 nread
= read_process_output (proc
, wait_proc
->infd
);
4664 total_nread
+= nread
;
4668 else if (nread
== -1 && EIO
== errno
)
4672 else if (nread
== -1 && EAGAIN
== errno
)
4676 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4680 if (total_nread
> 0 && do_display
)
4681 redisplay_preserve_echo_area (10);
4686 /* Wait till there is something to do */
4688 if (wait_proc
&& just_wait_proc
)
4690 if (wait_proc
->infd
< 0) /* Terminated */
4692 FD_SET (wait_proc
->infd
, &Available
);
4696 else if (!NILP (wait_for_cell
))
4698 Available
= non_process_wait_mask
;
4705 Available
= non_keyboard_wait_mask
;
4707 Available
= input_wait_mask
;
4708 Writeok
= write_mask
;
4709 #ifdef SELECT_CANT_DO_WRITE_MASK
4714 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4717 /* If frame size has changed or the window is newly mapped,
4718 redisplay now, before we start to wait. There is a race
4719 condition here; if a SIGIO arrives between now and the select
4720 and indicates that a frame is trashed, the select may block
4721 displaying a trashed screen. */
4722 if (frame_garbaged
&& do_display
)
4724 clear_waiting_for_input ();
4725 redisplay_preserve_echo_area (11);
4727 set_waiting_for_input (&timeout
);
4731 if (read_kbd
&& detect_input_pending ())
4739 #ifdef ADAPTIVE_READ_BUFFERING
4740 /* Set the timeout for adaptive read buffering if any
4741 process has non-zero read_output_skip and non-zero
4742 read_output_delay, and we are not reading output for a
4743 specific wait_channel. It is not executed if
4744 Vprocess_adaptive_read_buffering is nil. */
4745 if (process_output_skip
&& check_delay
> 0)
4747 int usecs
= EMACS_USECS (timeout
);
4748 if (EMACS_SECS (timeout
) > 0 || usecs
> READ_OUTPUT_DELAY_MAX
)
4749 usecs
= READ_OUTPUT_DELAY_MAX
;
4750 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4752 proc
= chan_process
[channel
];
4755 /* Find minimum non-zero read_output_delay among the
4756 processes with non-zero read_output_skip. */
4757 if (XPROCESS (proc
)->read_output_delay
> 0)
4760 if (!XPROCESS (proc
)->read_output_skip
)
4762 FD_CLR (channel
, &Available
);
4763 XPROCESS (proc
)->read_output_skip
= 0;
4764 if (XPROCESS (proc
)->read_output_delay
< usecs
)
4765 usecs
= XPROCESS (proc
)->read_output_delay
;
4768 EMACS_SET_SECS_USECS (timeout
, 0, usecs
);
4769 process_output_skip
= 0;
4772 #if defined (USE_GTK) || defined (HAVE_GCONF)
4774 #elif defined (HAVE_NS)
4779 (max (max_process_desc
, max_input_desc
) + 1,
4781 (check_write
? &Writeok
: (SELECT_TYPE
*)0),
4782 (SELECT_TYPE
*)0, &timeout
);
4787 /* Make C-g and alarm signals set flags again */
4788 clear_waiting_for_input ();
4790 /* If we woke up due to SIGWINCH, actually change size now. */
4791 do_pending_window_change (0);
4793 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4794 /* We wanted the full specified time, so return now. */
4798 if (xerrno
== EINTR
)
4800 else if (xerrno
== EBADF
)
4803 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4804 the child's closure of the pts gives the parent a SIGHUP, and
4805 the ptc file descriptor is automatically closed,
4806 yielding EBADF here or at select() call above.
4807 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4808 in m/ibmrt-aix.h), and here we just ignore the select error.
4809 Cleanup occurs c/o status_notify after SIGCLD. */
4810 no_avail
= 1; /* Cannot depend on values returned */
4816 error ("select error: %s", emacs_strerror (xerrno
));
4821 FD_ZERO (&Available
);
4825 #if 0 /* When polling is used, interrupt_input is 0,
4826 so get_input_pending should read the input.
4827 So this should not be needed. */
4828 /* If we are using polling for input,
4829 and we see input available, make it get read now.
4830 Otherwise it might not actually get read for a second.
4831 And on hpux, since we turn off polling in wait_reading_process_output,
4832 it might never get read at all if we don't spend much time
4833 outside of wait_reading_process_output. */
4834 if (read_kbd
&& interrupt_input
4835 && keyboard_bit_set (&Available
)
4836 && input_polling_used ())
4837 kill (getpid (), SIGALRM
);
4840 /* Check for keyboard input */
4841 /* If there is any, return immediately
4842 to give it higher priority than subprocesses */
4846 int old_timers_run
= timers_run
;
4847 struct buffer
*old_buffer
= current_buffer
;
4848 Lisp_Object old_window
= selected_window
;
4851 if (detect_input_pending_run_timers (do_display
))
4853 swallow_events (do_display
);
4854 if (detect_input_pending_run_timers (do_display
))
4858 /* If a timer has run, this might have changed buffers
4859 an alike. Make read_key_sequence aware of that. */
4860 if (timers_run
!= old_timers_run
4861 && waiting_for_user_input_p
== -1
4862 && (old_buffer
!= current_buffer
4863 || !EQ (old_window
, selected_window
)))
4864 record_asynch_buffer_change ();
4870 /* If there is unread keyboard input, also return. */
4872 && requeued_events_pending_p ())
4875 /* If we are not checking for keyboard input now,
4876 do process events (but don't run any timers).
4877 This is so that X events will be processed.
4878 Otherwise they may have to wait until polling takes place.
4879 That would causes delays in pasting selections, for example.
4881 (We used to do this only if wait_for_cell.) */
4882 if (read_kbd
== 0 && detect_input_pending ())
4884 swallow_events (do_display
);
4885 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4886 if (detect_input_pending ())
4891 /* Exit now if the cell we're waiting for became non-nil. */
4892 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4896 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4897 go read it. This can happen with X on BSD after logging out.
4898 In that case, there really is no input and no SIGIO,
4899 but select says there is input. */
4901 if (read_kbd
&& interrupt_input
4902 && keyboard_bit_set (&Available
) && ! noninteractive
)
4903 kill (getpid (), SIGIO
);
4907 got_some_input
|= nfds
> 0;
4909 /* If checking input just got us a size-change event from X,
4910 obey it now if we should. */
4911 if (read_kbd
|| ! NILP (wait_for_cell
))
4912 do_pending_window_change (0);
4914 /* Check for data from a process. */
4915 if (no_avail
|| nfds
== 0)
4918 for (channel
= 0; channel
<= max_input_desc
; ++channel
)
4920 struct fd_callback_data
*d
= &fd_callback_info
[channel
];
4921 if (FD_ISSET (channel
, &Available
)
4923 && (d
->condition
& FOR_READ
) != 0)
4924 d
->func (channel
, d
->data
, 1);
4925 if (FD_ISSET (channel
, &write_mask
)
4927 && (d
->condition
& FOR_WRITE
) != 0)
4928 d
->func (channel
, d
->data
, 0);
4931 /* Really FIRST_PROC_DESC should be 0 on Unix,
4932 but this is safer in the short run. */
4933 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4935 if (FD_ISSET (channel
, &Available
)
4936 && FD_ISSET (channel
, &non_keyboard_wait_mask
)
4937 && !FD_ISSET (channel
, &non_process_wait_mask
))
4941 /* If waiting for this channel, arrange to return as
4942 soon as no more input to be processed. No more
4944 if (wait_channel
== channel
)
4950 proc
= chan_process
[channel
];
4954 /* If this is a server stream socket, accept connection. */
4955 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4957 server_accept_connection (proc
, channel
);
4961 /* Read data from the process, starting with our
4962 buffered-ahead character if we have one. */
4964 nread
= read_process_output (proc
, channel
);
4967 /* Since read_process_output can run a filter,
4968 which can call accept-process-output,
4969 don't try to read from any other processes
4970 before doing the select again. */
4971 FD_ZERO (&Available
);
4974 redisplay_preserve_echo_area (12);
4977 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4980 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4981 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4983 else if (nread
== -1 && errno
== EAGAIN
)
4987 else if (nread
== -1 && errno
== EAGAIN
)
4989 /* Note that we cannot distinguish between no input
4990 available now and a closed pipe.
4991 With luck, a closed pipe will be accompanied by
4992 subprocess termination and SIGCHLD. */
4993 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4995 #endif /* O_NDELAY */
4996 #endif /* O_NONBLOCK */
4998 /* On some OSs with ptys, when the process on one end of
4999 a pty exits, the other end gets an error reading with
5000 errno = EIO instead of getting an EOF (0 bytes read).
5001 Therefore, if we get an error reading and errno =
5002 EIO, just continue, because the child process has
5003 exited and should clean itself up soon (e.g. when we
5006 However, it has been known to happen that the SIGCHLD
5007 got lost. So raise the signal again just in case.
5009 else if (nread
== -1 && errno
== EIO
)
5011 /* Clear the descriptor now, so we only raise the
5012 signal once. Don't do this if `process' is only
5014 if (XPROCESS (proc
)->pid
!= -2)
5016 FD_CLR (channel
, &input_wait_mask
);
5017 FD_CLR (channel
, &non_keyboard_wait_mask
);
5019 kill (getpid (), SIGCHLD
);
5022 #endif /* HAVE_PTYS */
5023 /* If we can detect process termination, don't consider the process
5024 gone just because its pipe is closed. */
5026 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
5031 /* Preserve status of processes already terminated. */
5032 XPROCESS (proc
)->tick
= ++process_tick
;
5033 deactivate_process (proc
);
5034 if (XPROCESS (proc
)->raw_status_new
)
5035 update_status (XPROCESS (proc
));
5036 if (EQ (XPROCESS (proc
)->status
, Qrun
))
5037 XPROCESS (proc
)->status
5038 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5041 #ifdef NON_BLOCKING_CONNECT
5042 if (FD_ISSET (channel
, &Writeok
)
5043 && FD_ISSET (channel
, &connect_wait_mask
))
5045 struct Lisp_Process
*p
;
5047 FD_CLR (channel
, &connect_wait_mask
);
5048 FD_CLR (channel
, &write_mask
);
5049 if (--num_pending_connects
< 0)
5052 proc
= chan_process
[channel
];
5056 p
= XPROCESS (proc
);
5059 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
5060 So only use it on systems where it is known to work. */
5062 int xlen
= sizeof (xerrno
);
5063 if (getsockopt (channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
5068 struct sockaddr pname
;
5069 int pnamelen
= sizeof (pname
);
5071 /* If connection failed, getpeername will fail. */
5073 if (getpeername (channel
, &pname
, &pnamelen
) < 0)
5075 /* Obtain connect failure code through error slippage. */
5078 if (errno
== ENOTCONN
&& read (channel
, &dummy
, 1) < 0)
5085 p
->tick
= ++process_tick
;
5086 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
5087 deactivate_process (proc
);
5092 /* Execute the sentinel here. If we had relied on
5093 status_notify to do it later, it will read input
5094 from the process before calling the sentinel. */
5095 exec_sentinel (proc
, build_string ("open\n"));
5096 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
5098 FD_SET (p
->infd
, &input_wait_mask
);
5099 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
5103 #endif /* NON_BLOCKING_CONNECT */
5104 } /* end for each file descriptor */
5105 } /* end while exit conditions not met */
5107 unbind_to (count
, Qnil
);
5109 /* If calling from keyboard input, do not quit
5110 since we want to return C-g as an input character.
5111 Otherwise, do pending quit if requested. */
5114 /* Prevent input_pending from remaining set if we quit. */
5115 clear_input_pending ();
5119 return got_some_input
;
5122 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
5125 read_process_output_call (Lisp_Object fun_and_args
)
5127 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
5131 read_process_output_error_handler (Lisp_Object error
)
5133 cmd_error_internal (error
, "error in process filter: ");
5135 update_echo_area ();
5136 Fsleep_for (make_number (2), Qnil
);
5140 /* Read pending output from the process channel,
5141 starting with our buffered-ahead character if we have one.
5142 Yield number of decoded characters read.
5144 This function reads at most 4096 characters.
5145 If you want to read all available subprocess output,
5146 you must call it repeatedly until it returns zero.
5148 The characters read are decoded according to PROC's coding-system
5152 read_process_output (Lisp_Object proc
, register int channel
)
5154 register int nbytes
;
5156 register Lisp_Object outstream
;
5157 register struct Lisp_Process
*p
= XPROCESS (proc
);
5158 register EMACS_INT opoint
;
5159 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5160 int carryover
= p
->decoding_carryover
;
5162 int count
= SPECPDL_INDEX ();
5163 Lisp_Object odeactivate
;
5165 chars
= (char *) alloca (carryover
+ readmax
);
5167 /* See the comment above. */
5168 memcpy (chars
, SDATA (p
->decoding_buf
), carryover
);
5170 #ifdef DATAGRAM_SOCKETS
5171 /* We have a working select, so proc_buffered_char is always -1. */
5172 if (DATAGRAM_CHAN_P (channel
))
5174 int len
= datagram_address
[channel
].len
;
5175 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5176 0, datagram_address
[channel
].sa
, &len
);
5180 if (proc_buffered_char
[channel
] < 0)
5183 if (XPROCESS (proc
)->gnutls_p
)
5184 nbytes
= emacs_gnutls_read (channel
, XPROCESS (proc
),
5185 chars
+ carryover
, readmax
);
5188 nbytes
= emacs_read (channel
, chars
+ carryover
, readmax
);
5189 #ifdef ADAPTIVE_READ_BUFFERING
5190 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5192 int delay
= p
->read_output_delay
;
5195 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5198 process_output_delay_count
++;
5199 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5202 else if (delay
> 0 && (nbytes
== readmax
))
5204 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5206 process_output_delay_count
--;
5208 p
->read_output_delay
= delay
;
5211 p
->read_output_skip
= 1;
5212 process_output_skip
= 1;
5219 chars
[carryover
] = proc_buffered_char
[channel
];
5220 proc_buffered_char
[channel
] = -1;
5222 if (XPROCESS (proc
)->gnutls_p
)
5223 nbytes
= emacs_gnutls_read (channel
, XPROCESS (proc
),
5224 chars
+ carryover
+ 1, readmax
- 1);
5227 nbytes
= emacs_read (channel
, chars
+ carryover
+ 1, readmax
- 1);
5231 nbytes
= nbytes
+ 1;
5234 p
->decoding_carryover
= 0;
5236 /* At this point, NBYTES holds number of bytes just received
5237 (including the one in proc_buffered_char[channel]). */
5240 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5242 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5245 /* Now set NBYTES how many bytes we must decode. */
5246 nbytes
+= carryover
;
5248 odeactivate
= Vdeactivate_mark
;
5249 /* There's no good reason to let process filters change the current
5250 buffer, and many callers of accept-process-output, sit-for, and
5251 friends don't expect current-buffer to be changed from under them. */
5252 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
5254 /* Read and dispose of the process output. */
5255 outstream
= p
->filter
;
5256 if (!NILP (outstream
))
5258 Lisp_Object obuffer
, okeymap
;
5260 int outer_running_asynch_code
= running_asynch_code
;
5261 int waiting
= waiting_for_user_input_p
;
5263 /* No need to gcpro these, because all we do with them later
5264 is test them for EQness, and none of them should be a string. */
5265 XSETBUFFER (obuffer
, current_buffer
);
5266 okeymap
= BVAR (current_buffer
, keymap
);
5268 /* We inhibit quit here instead of just catching it so that
5269 hitting ^G when a filter happens to be running won't screw
5271 specbind (Qinhibit_quit
, Qt
);
5272 specbind (Qlast_nonmenu_event
, Qt
);
5274 /* In case we get recursively called,
5275 and we already saved the match data nonrecursively,
5276 save the same match data in safely recursive fashion. */
5277 if (outer_running_asynch_code
)
5280 /* Don't clobber the CURRENT match data, either! */
5281 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5282 restore_search_regs ();
5283 record_unwind_save_match_data ();
5284 Fset_match_data (tem
, Qt
);
5287 /* For speed, if a search happens within this code,
5288 save the match data in a special nonrecursive fashion. */
5289 running_asynch_code
= 1;
5291 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5292 text
= coding
->dst_object
;
5293 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5294 /* A new coding system might be found. */
5295 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5297 p
->decode_coding_system
= Vlast_coding_system_used
;
5299 /* Don't call setup_coding_system for
5300 proc_decode_coding_system[channel] here. It is done in
5301 detect_coding called via decode_coding above. */
5303 /* If a coding system for encoding is not yet decided, we set
5304 it as the same as coding-system for decoding.
5306 But, before doing that we must check if
5307 proc_encode_coding_system[p->outfd] surely points to a
5308 valid memory because p->outfd will be changed once EOF is
5309 sent to the process. */
5310 if (NILP (p
->encode_coding_system
)
5311 && proc_encode_coding_system
[p
->outfd
])
5313 p
->encode_coding_system
5314 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5315 setup_coding_system (p
->encode_coding_system
,
5316 proc_encode_coding_system
[p
->outfd
]);
5320 if (coding
->carryover_bytes
> 0)
5322 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5323 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5324 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5325 coding
->carryover_bytes
);
5326 p
->decoding_carryover
= coding
->carryover_bytes
;
5328 if (SBYTES (text
) > 0)
5329 internal_condition_case_1 (read_process_output_call
,
5331 Fcons (proc
, Fcons (text
, Qnil
))),
5332 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5333 read_process_output_error_handler
);
5335 /* If we saved the match data nonrecursively, restore it now. */
5336 restore_search_regs ();
5337 running_asynch_code
= outer_running_asynch_code
;
5339 /* Restore waiting_for_user_input_p as it was
5340 when we were called, in case the filter clobbered it. */
5341 waiting_for_user_input_p
= waiting
;
5343 #if 0 /* Call record_asynch_buffer_change unconditionally,
5344 because we might have changed minor modes or other things
5345 that affect key bindings. */
5346 if (! EQ (Fcurrent_buffer (), obuffer
)
5347 || ! EQ (current_buffer
->keymap
, okeymap
))
5349 /* But do it only if the caller is actually going to read events.
5350 Otherwise there's no need to make him wake up, and it could
5351 cause trouble (for example it would make sit_for return). */
5352 if (waiting_for_user_input_p
== -1)
5353 record_asynch_buffer_change ();
5356 /* If no filter, write into buffer if it isn't dead. */
5357 else if (!NILP (p
->buffer
) && !NILP (BVAR (XBUFFER (p
->buffer
), name
)))
5359 Lisp_Object old_read_only
;
5360 EMACS_INT old_begv
, old_zv
;
5361 EMACS_INT old_begv_byte
, old_zv_byte
;
5362 EMACS_INT before
, before_byte
;
5363 EMACS_INT opoint_byte
;
5367 Fset_buffer (p
->buffer
);
5369 opoint_byte
= PT_BYTE
;
5370 old_read_only
= BVAR (current_buffer
, read_only
);
5373 old_begv_byte
= BEGV_BYTE
;
5374 old_zv_byte
= ZV_BYTE
;
5376 BVAR (current_buffer
, read_only
) = Qnil
;
5378 /* Insert new output into buffer
5379 at the current end-of-output marker,
5380 thus preserving logical ordering of input and output. */
5381 if (XMARKER (p
->mark
)->buffer
)
5382 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
5383 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
5386 SET_PT_BOTH (ZV
, ZV_BYTE
);
5388 before_byte
= PT_BYTE
;
5390 /* If the output marker is outside of the visible region, save
5391 the restriction and widen. */
5392 if (! (BEGV
<= PT
&& PT
<= ZV
))
5395 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5396 text
= coding
->dst_object
;
5397 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5398 /* A new coding system might be found. See the comment in the
5399 similar code in the previous `if' block. */
5400 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5402 p
->decode_coding_system
= Vlast_coding_system_used
;
5403 if (NILP (p
->encode_coding_system
)
5404 && proc_encode_coding_system
[p
->outfd
])
5406 p
->encode_coding_system
5407 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5408 setup_coding_system (p
->encode_coding_system
,
5409 proc_encode_coding_system
[p
->outfd
]);
5412 if (coding
->carryover_bytes
> 0)
5414 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5415 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5416 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5417 coding
->carryover_bytes
);
5418 p
->decoding_carryover
= coding
->carryover_bytes
;
5420 /* Adjust the multibyteness of TEXT to that of the buffer. */
5421 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
5422 != ! STRING_MULTIBYTE (text
))
5423 text
= (STRING_MULTIBYTE (text
)
5424 ? Fstring_as_unibyte (text
)
5425 : Fstring_to_multibyte (text
));
5426 /* Insert before markers in case we are inserting where
5427 the buffer's mark is, and the user's next command is Meta-y. */
5428 insert_from_string_before_markers (text
, 0, 0,
5429 SCHARS (text
), SBYTES (text
), 0);
5431 /* Make sure the process marker's position is valid when the
5432 process buffer is changed in the signal_after_change above.
5433 W3 is known to do that. */
5434 if (BUFFERP (p
->buffer
)
5435 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5436 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5438 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5440 update_mode_lines
++;
5442 /* Make sure opoint and the old restrictions
5443 float ahead of any new text just as point would. */
5444 if (opoint
>= before
)
5446 opoint
+= PT
- before
;
5447 opoint_byte
+= PT_BYTE
- before_byte
;
5449 if (old_begv
> before
)
5451 old_begv
+= PT
- before
;
5452 old_begv_byte
+= PT_BYTE
- before_byte
;
5454 if (old_zv
>= before
)
5456 old_zv
+= PT
- before
;
5457 old_zv_byte
+= PT_BYTE
- before_byte
;
5460 /* If the restriction isn't what it should be, set it. */
5461 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5462 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5465 BVAR (current_buffer
, read_only
) = old_read_only
;
5466 SET_PT_BOTH (opoint
, opoint_byte
);
5468 /* Handling the process output should not deactivate the mark. */
5469 Vdeactivate_mark
= odeactivate
;
5471 unbind_to (count
, Qnil
);
5475 /* Sending data to subprocess */
5477 jmp_buf send_process_frame
;
5478 Lisp_Object process_sent_to
;
5481 send_process_trap (int ignore
)
5483 SIGNAL_THREAD_CHECK (SIGPIPE
);
5484 sigunblock (sigmask (SIGPIPE
));
5485 longjmp (send_process_frame
, 1);
5488 /* Send some data to process PROC.
5489 BUF is the beginning of the data; LEN is the number of characters.
5490 OBJECT is the Lisp object that the data comes from. If OBJECT is
5491 nil or t, it means that the data comes from C string.
5493 If OBJECT is not nil, the data is encoded by PROC's coding-system
5494 for encoding before it is sent.
5496 This function can evaluate Lisp code and can garbage collect. */
5499 send_process (volatile Lisp_Object proc
, const char *volatile buf
,
5500 volatile EMACS_INT len
, volatile Lisp_Object object
)
5502 /* Use volatile to protect variables from being clobbered by longjmp. */
5503 struct Lisp_Process
*p
= XPROCESS (proc
);
5505 struct coding_system
*coding
;
5506 struct gcpro gcpro1
;
5507 SIGTYPE (*volatile old_sigpipe
) (int);
5511 if (p
->raw_status_new
)
5513 if (! EQ (p
->status
, Qrun
))
5514 error ("Process %s not running", SDATA (p
->name
));
5516 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5518 coding
= proc_encode_coding_system
[p
->outfd
];
5519 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5521 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5522 || (BUFFERP (object
)
5523 && !NILP (BVAR (XBUFFER (object
), enable_multibyte_characters
)))
5526 p
->encode_coding_system
5527 = complement_process_encoding_system (p
->encode_coding_system
);
5528 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
5530 /* The coding system for encoding was changed to raw-text
5531 because we sent a unibyte text previously. Now we are
5532 sending a multibyte text, thus we must encode it by the
5533 original coding system specified for the current process.
5535 Another reason we comming here is that the coding system
5536 was just complemented and new one was returned by
5537 complement_process_encoding_system. */
5538 setup_coding_system (p
->encode_coding_system
, coding
);
5539 Vlast_coding_system_used
= p
->encode_coding_system
;
5541 coding
->src_multibyte
= 1;
5545 /* For sending a unibyte text, character code conversion should
5546 not take place but EOL conversion should. So, setup raw-text
5547 or one of the subsidiary if we have not yet done it. */
5548 if (CODING_REQUIRE_ENCODING (coding
))
5550 if (CODING_REQUIRE_FLUSHING (coding
))
5552 /* But, before changing the coding, we must flush out data. */
5553 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5554 send_process (proc
, "", 0, Qt
);
5555 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
5557 setup_coding_system (raw_text_coding_system
5558 (Vlast_coding_system_used
),
5560 coding
->src_multibyte
= 0;
5563 coding
->dst_multibyte
= 0;
5565 if (CODING_REQUIRE_ENCODING (coding
))
5567 coding
->dst_object
= Qt
;
5568 if (BUFFERP (object
))
5570 EMACS_INT from_byte
, from
, to
;
5571 EMACS_INT save_pt
, save_pt_byte
;
5572 struct buffer
*cur
= current_buffer
;
5574 set_buffer_internal (XBUFFER (object
));
5575 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
5577 from_byte
= PTR_BYTE_POS ((unsigned char *) buf
);
5578 from
= BYTE_TO_CHAR (from_byte
);
5579 to
= BYTE_TO_CHAR (from_byte
+ len
);
5580 TEMP_SET_PT_BOTH (from
, from_byte
);
5581 encode_coding_object (coding
, object
, from
, from_byte
,
5582 to
, from_byte
+ len
, Qt
);
5583 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
5584 set_buffer_internal (cur
);
5586 else if (STRINGP (object
))
5588 encode_coding_object (coding
, object
, 0, 0, SCHARS (object
),
5589 SBYTES (object
), Qt
);
5593 coding
->dst_object
= make_unibyte_string (buf
, len
);
5594 coding
->produced
= len
;
5597 len
= coding
->produced
;
5598 object
= coding
->dst_object
;
5599 buf
= SSDATA (object
);
5602 if (pty_max_bytes
== 0)
5604 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5605 pty_max_bytes
= fpathconf (p
->outfd
, _PC_MAX_CANON
);
5606 if (pty_max_bytes
< 0)
5607 pty_max_bytes
= 250;
5609 pty_max_bytes
= 250;
5611 /* Deduct one, to leave space for the eof. */
5615 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
5616 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
5617 when returning with longjmp despite being declared volatile. */
5618 if (!setjmp (send_process_frame
))
5620 process_sent_to
= proc
;
5623 EMACS_INT
this = len
;
5625 /* Send this batch, using one or more write calls. */
5628 int outfd
= p
->outfd
;
5629 old_sigpipe
= (SIGTYPE (*) (int)) signal (SIGPIPE
, send_process_trap
);
5630 #ifdef DATAGRAM_SOCKETS
5631 if (DATAGRAM_CHAN_P (outfd
))
5633 rv
= sendto (outfd
, buf
, this,
5634 0, datagram_address
[outfd
].sa
,
5635 datagram_address
[outfd
].len
);
5636 if (rv
< 0 && errno
== EMSGSIZE
)
5638 signal (SIGPIPE
, old_sigpipe
);
5639 report_file_error ("sending datagram",
5640 Fcons (proc
, Qnil
));
5647 if (XPROCESS (proc
)->gnutls_p
)
5648 rv
= emacs_gnutls_write (outfd
,
5653 rv
= emacs_write (outfd
, buf
, this);
5654 #ifdef ADAPTIVE_READ_BUFFERING
5655 if (p
->read_output_delay
> 0
5656 && p
->adaptive_read_buffering
== 1)
5658 p
->read_output_delay
= 0;
5659 process_output_delay_count
--;
5660 p
->read_output_skip
= 0;
5664 signal (SIGPIPE
, old_sigpipe
);
5670 || errno
== EWOULDBLOCK
5676 /* Buffer is full. Wait, accepting input;
5677 that may allow the program
5678 to finish doing output and read more. */
5682 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5683 /* A gross hack to work around a bug in FreeBSD.
5684 In the following sequence, read(2) returns
5688 write(2) 954 bytes, get EAGAIN
5689 read(2) 1024 bytes in process_read_output
5690 read(2) 11 bytes in process_read_output
5692 That is, read(2) returns more bytes than have
5693 ever been written successfully. The 1033 bytes
5694 read are the 1022 bytes written successfully
5695 after processing (for example with CRs added if
5696 the terminal is set up that way which it is
5697 here). The same bytes will be seen again in a
5698 later read(2), without the CRs. */
5700 if (errno
== EAGAIN
)
5703 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5705 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5707 /* Running filters might relocate buffers or strings.
5708 Arrange to relocate BUF. */
5709 if (BUFFERP (object
))
5710 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
),
5711 (unsigned char *) buf
);
5712 else if (STRINGP (object
))
5713 offset
= buf
- SSDATA (object
);
5715 #ifdef EMACS_HAS_USECS
5716 wait_reading_process_output (0, 20000, 0, 0, Qnil
, NULL
, 0);
5718 wait_reading_process_output (1, 0, 0, 0, Qnil
, NULL
, 0);
5721 if (BUFFERP (object
))
5722 buf
= (char *) BUF_BYTE_ADDRESS (XBUFFER (object
),
5724 else if (STRINGP (object
))
5725 buf
= offset
+ SSDATA (object
);
5730 /* This is a real error. */
5731 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5741 signal (SIGPIPE
, old_sigpipe
);
5742 proc
= process_sent_to
;
5743 p
= XPROCESS (proc
);
5744 p
->raw_status_new
= 0;
5745 p
->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5746 p
->tick
= ++process_tick
;
5747 deactivate_process (proc
);
5748 error ("SIGPIPE raised on process %s; closed it", SDATA (p
->name
));
5754 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5756 doc
: /* Send current contents of region as input to PROCESS.
5757 PROCESS may be a process, a buffer, the name of a process or buffer, or
5758 nil, indicating the current buffer's process.
5759 Called from program, takes three arguments, PROCESS, START and END.
5760 If the region is more than 500 characters long,
5761 it is sent in several bunches. This may happen even for shorter regions.
5762 Output from processes can arrive in between bunches. */)
5763 (Lisp_Object process
, Lisp_Object start
, Lisp_Object end
)
5766 EMACS_INT start1
, end1
;
5768 proc
= get_process (process
);
5769 validate_region (&start
, &end
);
5771 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5772 move_gap (XINT (start
));
5774 start1
= CHAR_TO_BYTE (XINT (start
));
5775 end1
= CHAR_TO_BYTE (XINT (end
));
5776 send_process (proc
, (char *) BYTE_POS_ADDR (start1
), end1
- start1
,
5777 Fcurrent_buffer ());
5782 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5784 doc
: /* Send PROCESS the contents of STRING as input.
5785 PROCESS may be a process, a buffer, the name of a process or buffer, or
5786 nil, indicating the current buffer's process.
5787 If STRING is more than 500 characters long,
5788 it is sent in several bunches. This may happen even for shorter strings.
5789 Output from processes can arrive in between bunches. */)
5790 (Lisp_Object process
, Lisp_Object string
)
5793 CHECK_STRING (string
);
5794 proc
= get_process (process
);
5795 send_process (proc
, SSDATA (string
),
5796 SBYTES (string
), string
);
5800 /* Return the foreground process group for the tty/pty that
5801 the process P uses. */
5803 emacs_get_tty_pgrp (struct Lisp_Process
*p
)
5808 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5811 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5812 master side. Try the slave side. */
5813 fd
= emacs_open (SSDATA (p
->tty_name
), O_RDONLY
, 0);
5817 ioctl (fd
, TIOCGPGRP
, &gid
);
5821 #endif /* defined (TIOCGPGRP ) */
5826 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5827 Sprocess_running_child_p
, 0, 1, 0,
5828 doc
: /* Return t if PROCESS has given the terminal to a child.
5829 If the operating system does not make it possible to find out,
5830 return t unconditionally. */)
5831 (Lisp_Object process
)
5833 /* Initialize in case ioctl doesn't exist or gives an error,
5834 in a way that will cause returning t. */
5837 struct Lisp_Process
*p
;
5839 proc
= get_process (process
);
5840 p
= XPROCESS (proc
);
5842 if (!EQ (p
->type
, Qreal
))
5843 error ("Process %s is not a subprocess",
5846 error ("Process %s is not active",
5849 gid
= emacs_get_tty_pgrp (p
);
5856 /* send a signal number SIGNO to PROCESS.
5857 If CURRENT_GROUP is t, that means send to the process group
5858 that currently owns the terminal being used to communicate with PROCESS.
5859 This is used for various commands in shell mode.
5860 If CURRENT_GROUP is lambda, that means send to the process group
5861 that currently owns the terminal, but only if it is NOT the shell itself.
5863 If NOMSG is zero, insert signal-announcements into process's buffers
5866 If we can, we try to signal PROCESS by sending control characters
5867 down the pty. This allows us to signal inferiors who have changed
5868 their uid, for which killpg would return an EPERM error. */
5871 process_send_signal (Lisp_Object process
, int signo
, Lisp_Object current_group
,
5875 register struct Lisp_Process
*p
;
5879 proc
= get_process (process
);
5880 p
= XPROCESS (proc
);
5882 if (!EQ (p
->type
, Qreal
))
5883 error ("Process %s is not a subprocess",
5886 error ("Process %s is not active",
5890 current_group
= Qnil
;
5892 /* If we are using pgrps, get a pgrp number and make it negative. */
5893 if (NILP (current_group
))
5894 /* Send the signal to the shell's process group. */
5898 #ifdef SIGNALS_VIA_CHARACTERS
5899 /* If possible, send signals to the entire pgrp
5900 by sending an input character to it. */
5903 cc_t
*sig_char
= NULL
;
5905 tcgetattr (p
->infd
, &t
);
5910 sig_char
= &t
.c_cc
[VINTR
];
5914 sig_char
= &t
.c_cc
[VQUIT
];
5918 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5919 sig_char
= &t
.c_cc
[VSWTCH
];
5921 sig_char
= &t
.c_cc
[VSUSP
];
5926 if (sig_char
&& *sig_char
!= CDISABLE
)
5928 send_process (proc
, sig_char
, 1, Qnil
);
5931 /* If we can't send the signal with a character,
5932 fall through and send it another way. */
5934 /* The code above may fall through if it can't
5935 handle the signal. */
5936 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5939 /* Get the current pgrp using the tty itself, if we have that.
5940 Otherwise, use the pty to get the pgrp.
5941 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5942 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5943 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5944 His patch indicates that if TIOCGPGRP returns an error, then
5945 we should just assume that p->pid is also the process group id. */
5947 gid
= emacs_get_tty_pgrp (p
);
5950 /* If we can't get the information, assume
5951 the shell owns the tty. */
5954 /* It is not clear whether anything really can set GID to -1.
5955 Perhaps on some system one of those ioctls can or could do so.
5956 Or perhaps this is vestigial. */
5959 #else /* ! defined (TIOCGPGRP ) */
5960 /* Can't select pgrps on this system, so we know that
5961 the child itself heads the pgrp. */
5963 #endif /* ! defined (TIOCGPGRP ) */
5965 /* If current_group is lambda, and the shell owns the terminal,
5966 don't send any signal. */
5967 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
5975 p
->raw_status_new
= 0;
5977 p
->tick
= ++process_tick
;
5980 status_notify (NULL
);
5981 redisplay_preserve_echo_area (13);
5984 #endif /* ! defined (SIGCONT) */
5988 flush_pending_output (p
->infd
);
5992 /* If we don't have process groups, send the signal to the immediate
5993 subprocess. That isn't really right, but it's better than any
5994 obvious alternative. */
5997 kill (p
->pid
, signo
);
6001 /* gid may be a pid, or minus a pgrp's number */
6003 if (!NILP (current_group
))
6005 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
6006 EMACS_KILLPG (gid
, signo
);
6013 #else /* ! defined (TIOCSIGSEND) */
6014 EMACS_KILLPG (gid
, signo
);
6015 #endif /* ! defined (TIOCSIGSEND) */
6018 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
6019 doc
: /* Interrupt process PROCESS.
6020 PROCESS may be a process, a buffer, or the name of a process or buffer.
6021 No arg or nil means current buffer's process.
6022 Second arg CURRENT-GROUP non-nil means send signal to
6023 the current process-group of the process's controlling terminal
6024 rather than to the process's own process group.
6025 If the process is a shell, this means interrupt current subjob
6026 rather than the shell.
6028 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
6029 don't send the signal. */)
6030 (Lisp_Object process
, Lisp_Object current_group
)
6032 process_send_signal (process
, SIGINT
, current_group
, 0);
6036 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
6037 doc
: /* Kill process PROCESS. May be process or name of one.
6038 See function `interrupt-process' for more details on usage. */)
6039 (Lisp_Object process
, Lisp_Object current_group
)
6041 process_send_signal (process
, SIGKILL
, current_group
, 0);
6045 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
6046 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
6047 See function `interrupt-process' for more details on usage. */)
6048 (Lisp_Object process
, Lisp_Object current_group
)
6050 process_send_signal (process
, SIGQUIT
, current_group
, 0);
6054 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
6055 doc
: /* Stop process PROCESS. May be process or name of one.
6056 See function `interrupt-process' for more details on usage.
6057 If PROCESS is a network or serial process, inhibit handling of incoming
6059 (Lisp_Object process
, Lisp_Object current_group
)
6061 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6063 struct Lisp_Process
*p
;
6065 p
= XPROCESS (process
);
6066 if (NILP (p
->command
)
6069 FD_CLR (p
->infd
, &input_wait_mask
);
6070 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6076 error ("No SIGTSTP support");
6078 process_send_signal (process
, SIGTSTP
, current_group
, 0);
6083 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
6084 doc
: /* Continue process PROCESS. May be process or name of one.
6085 See function `interrupt-process' for more details on usage.
6086 If PROCESS is a network or serial process, resume handling of incoming
6088 (Lisp_Object process
, Lisp_Object current_group
)
6090 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6092 struct Lisp_Process
*p
;
6094 p
= XPROCESS (process
);
6095 if (EQ (p
->command
, Qt
)
6097 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
6099 FD_SET (p
->infd
, &input_wait_mask
);
6100 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
6102 if (fd_info
[ p
->infd
].flags
& FILE_SERIAL
)
6103 PurgeComm (fd_info
[ p
->infd
].hnd
, PURGE_RXABORT
| PURGE_RXCLEAR
);
6104 #else /* not WINDOWSNT */
6105 tcflush (p
->infd
, TCIFLUSH
);
6106 #endif /* not WINDOWSNT */
6112 process_send_signal (process
, SIGCONT
, current_group
, 0);
6114 error ("No SIGCONT support");
6119 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
6120 2, 2, "sProcess (name or number): \nnSignal code: ",
6121 doc
: /* Send PROCESS the signal with code SIGCODE.
6122 PROCESS may also be a number specifying the process id of the
6123 process to signal; in this case, the process need not be a child of
6125 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
6126 (Lisp_Object process
, Lisp_Object sigcode
)
6130 if (INTEGERP (process
))
6132 pid
= XINT (process
);
6136 if (FLOATP (process
))
6138 pid
= (pid_t
) XFLOAT_DATA (process
);
6142 if (STRINGP (process
))
6145 if (tem
= Fget_process (process
), NILP (tem
))
6147 pid
= XINT (Fstring_to_number (process
, make_number (10)));
6154 process
= get_process (process
);
6159 CHECK_PROCESS (process
);
6160 pid
= XPROCESS (process
)->pid
;
6162 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6166 #define parse_signal(NAME, VALUE) \
6167 else if (!xstrcasecmp (name, NAME)) \
6168 XSETINT (sigcode, VALUE)
6170 if (INTEGERP (sigcode
))
6176 CHECK_SYMBOL (sigcode
);
6177 name
= SSDATA (SYMBOL_NAME (sigcode
));
6179 if (!strncmp (name
, "SIG", 3) || !strncmp (name
, "sig", 3))
6185 parse_signal ("usr1", SIGUSR1
);
6188 parse_signal ("usr2", SIGUSR2
);
6191 parse_signal ("term", SIGTERM
);
6194 parse_signal ("hup", SIGHUP
);
6197 parse_signal ("int", SIGINT
);
6200 parse_signal ("quit", SIGQUIT
);
6203 parse_signal ("ill", SIGILL
);
6206 parse_signal ("abrt", SIGABRT
);
6209 parse_signal ("emt", SIGEMT
);
6212 parse_signal ("kill", SIGKILL
);
6215 parse_signal ("fpe", SIGFPE
);
6218 parse_signal ("bus", SIGBUS
);
6221 parse_signal ("segv", SIGSEGV
);
6224 parse_signal ("sys", SIGSYS
);
6227 parse_signal ("pipe", SIGPIPE
);
6230 parse_signal ("alrm", SIGALRM
);
6233 parse_signal ("urg", SIGURG
);
6236 parse_signal ("stop", SIGSTOP
);
6239 parse_signal ("tstp", SIGTSTP
);
6242 parse_signal ("cont", SIGCONT
);
6245 parse_signal ("chld", SIGCHLD
);
6248 parse_signal ("ttin", SIGTTIN
);
6251 parse_signal ("ttou", SIGTTOU
);
6254 parse_signal ("io", SIGIO
);
6257 parse_signal ("xcpu", SIGXCPU
);
6260 parse_signal ("xfsz", SIGXFSZ
);
6263 parse_signal ("vtalrm", SIGVTALRM
);
6266 parse_signal ("prof", SIGPROF
);
6269 parse_signal ("winch", SIGWINCH
);
6272 parse_signal ("info", SIGINFO
);
6275 error ("Undefined signal name %s", name
);
6280 return make_number (kill (pid
, XINT (sigcode
)));
6283 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6284 doc
: /* Make PROCESS see end-of-file in its input.
6285 EOF comes after any text already sent to it.
6286 PROCESS may be a process, a buffer, the name of a process or buffer, or
6287 nil, indicating the current buffer's process.
6288 If PROCESS is a network connection, or is a process communicating
6289 through a pipe (as opposed to a pty), then you cannot send any more
6290 text to PROCESS after you call this function.
6291 If PROCESS is a serial process, wait until all output written to the
6292 process has been transmitted to the serial port. */)
6293 (Lisp_Object process
)
6296 struct coding_system
*coding
;
6298 if (DATAGRAM_CONN_P (process
))
6301 proc
= get_process (process
);
6302 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6304 /* Make sure the process is really alive. */
6305 if (XPROCESS (proc
)->raw_status_new
)
6306 update_status (XPROCESS (proc
));
6307 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6308 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6310 if (CODING_REQUIRE_FLUSHING (coding
))
6312 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6313 send_process (proc
, "", 0, Qnil
);
6316 if (XPROCESS (proc
)->pty_flag
)
6317 send_process (proc
, "\004", 1, Qnil
);
6318 else if (EQ (XPROCESS (proc
)->type
, Qserial
))
6321 if (tcdrain (XPROCESS (proc
)->outfd
) != 0)
6322 error ("tcdrain() failed: %s", emacs_strerror (errno
));
6323 #endif /* not WINDOWSNT */
6324 /* Do nothing on Windows because writes are blocking. */
6328 int old_outfd
, new_outfd
;
6330 #ifdef HAVE_SHUTDOWN
6331 /* If this is a network connection, or socketpair is used
6332 for communication with the subprocess, call shutdown to cause EOF.
6333 (In some old system, shutdown to socketpair doesn't work.
6334 Then we just can't win.) */
6335 if (EQ (XPROCESS (proc
)->type
, Qnetwork
)
6336 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6337 shutdown (XPROCESS (proc
)->outfd
, 1);
6338 /* In case of socketpair, outfd == infd, so don't close it. */
6339 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6340 emacs_close (XPROCESS (proc
)->outfd
);
6341 #else /* not HAVE_SHUTDOWN */
6342 emacs_close (XPROCESS (proc
)->outfd
);
6343 #endif /* not HAVE_SHUTDOWN */
6344 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6347 old_outfd
= XPROCESS (proc
)->outfd
;
6349 if (!proc_encode_coding_system
[new_outfd
])
6350 proc_encode_coding_system
[new_outfd
]
6351 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6352 memcpy (proc_encode_coding_system
[new_outfd
],
6353 proc_encode_coding_system
[old_outfd
],
6354 sizeof (struct coding_system
));
6355 memset (proc_encode_coding_system
[old_outfd
], 0,
6356 sizeof (struct coding_system
));
6358 XPROCESS (proc
)->outfd
= new_outfd
;
6363 /* On receipt of a signal that a child status has changed, loop asking
6364 about children with changed statuses until the system says there
6367 All we do is change the status; we do not run sentinels or print
6368 notifications. That is saved for the next time keyboard input is
6369 done, in order to avoid timing errors.
6371 ** WARNING: this can be called during garbage collection.
6372 Therefore, it must not be fooled by the presence of mark bits in
6375 ** USG WARNING: Although it is not obvious from the documentation
6376 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6377 signal() before executing at least one wait(), otherwise the
6378 handler will be called again, resulting in an infinite loop. The
6379 relevant portion of the documentation reads "SIGCLD signals will be
6380 queued and the signal-catching function will be continually
6381 reentered until the queue is empty". Invoking signal() causes the
6382 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6385 ** Malloc WARNING: This should never call malloc either directly or
6386 indirectly; if it does, that is a bug */
6390 sigchld_handler (int signo
)
6392 int old_errno
= errno
;
6394 struct Lisp_Process
*p
;
6396 SIGNAL_THREAD_CHECK (signo
);
6407 #endif /* no WUNTRACED */
6408 /* Keep trying to get a status until we get a definitive result. */
6412 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
6414 while (pid
< 0 && errno
== EINTR
);
6418 /* PID == 0 means no processes found, PID == -1 means a real
6419 failure. We have done all our job, so return. */
6426 #endif /* no WNOHANG */
6428 /* Find the process that signaled us, and record its status. */
6430 /* The process can have been deleted by Fdelete_process. */
6431 for (tail
= deleted_pid_list
; CONSP (tail
); tail
= XCDR (tail
))
6433 Lisp_Object xpid
= XCAR (tail
);
6434 if ((INTEGERP (xpid
) && pid
== (pid_t
) XINT (xpid
))
6435 || (FLOATP (xpid
) && pid
== (pid_t
) XFLOAT_DATA (xpid
)))
6437 XSETCAR (tail
, Qnil
);
6438 goto sigchld_end_of_loop
;
6442 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6444 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6446 proc
= XCDR (XCAR (tail
));
6447 p
= XPROCESS (proc
);
6448 if (EQ (p
->type
, Qreal
) && p
->pid
== pid
)
6453 /* Look for an asynchronous process whose pid hasn't been filled
6456 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6458 proc
= XCDR (XCAR (tail
));
6459 p
= XPROCESS (proc
);
6465 /* Change the status of the process that was found. */
6468 int clear_desc_flag
= 0;
6470 p
->tick
= ++process_tick
;
6472 p
->raw_status_new
= 1;
6474 /* If process has terminated, stop waiting for its output. */
6475 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6477 clear_desc_flag
= 1;
6479 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6480 if (clear_desc_flag
)
6482 FD_CLR (p
->infd
, &input_wait_mask
);
6483 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6486 /* Tell wait_reading_process_output that it needs to wake up and
6488 if (input_available_clear_time
)
6489 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6492 /* There was no asynchronous process found for that pid: we have
6493 a synchronous process. */
6496 synch_process_alive
= 0;
6498 /* Report the status of the synchronous process. */
6500 synch_process_retcode
= WRETCODE (w
);
6501 else if (WIFSIGNALED (w
))
6502 synch_process_termsig
= WTERMSIG (w
);
6504 /* Tell wait_reading_process_output that it needs to wake up and
6506 if (input_available_clear_time
)
6507 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6510 sigchld_end_of_loop
:
6513 /* On some systems, we must return right away.
6514 If any more processes want to signal us, we will
6516 Otherwise (on systems that have WNOHANG), loop around
6517 to use up all the processes that have something to tell us. */
6518 #if (defined WINDOWSNT \
6519 || (defined USG && !defined GNU_LINUX \
6520 && !(defined HPUX && defined WNOHANG)))
6523 #endif /* USG, but not HPUX with WNOHANG */
6526 #endif /* SIGCHLD */
6530 exec_sentinel_unwind (Lisp_Object data
)
6532 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
6537 exec_sentinel_error_handler (Lisp_Object error
)
6539 cmd_error_internal (error
, "error in process sentinel: ");
6541 update_echo_area ();
6542 Fsleep_for (make_number (2), Qnil
);
6547 exec_sentinel (Lisp_Object proc
, Lisp_Object reason
)
6549 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
6550 register struct Lisp_Process
*p
= XPROCESS (proc
);
6551 int count
= SPECPDL_INDEX ();
6552 int outer_running_asynch_code
= running_asynch_code
;
6553 int waiting
= waiting_for_user_input_p
;
6555 if (inhibit_sentinels
)
6558 /* No need to gcpro these, because all we do with them later
6559 is test them for EQness, and none of them should be a string. */
6560 odeactivate
= Vdeactivate_mark
;
6561 XSETBUFFER (obuffer
, current_buffer
);
6562 okeymap
= BVAR (current_buffer
, keymap
);
6564 /* There's no good reason to let sentinels change the current
6565 buffer, and many callers of accept-process-output, sit-for, and
6566 friends don't expect current-buffer to be changed from under them. */
6567 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
6569 sentinel
= p
->sentinel
;
6570 if (NILP (sentinel
))
6573 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6574 assure that it gets restored no matter how the sentinel exits. */
6576 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6577 /* Inhibit quit so that random quits don't screw up a running filter. */
6578 specbind (Qinhibit_quit
, Qt
);
6579 specbind (Qlast_nonmenu_event
, Qt
); /* Why? --Stef */
6581 /* In case we get recursively called,
6582 and we already saved the match data nonrecursively,
6583 save the same match data in safely recursive fashion. */
6584 if (outer_running_asynch_code
)
6587 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6588 restore_search_regs ();
6589 record_unwind_save_match_data ();
6590 Fset_match_data (tem
, Qt
);
6593 /* For speed, if a search happens within this code,
6594 save the match data in a special nonrecursive fashion. */
6595 running_asynch_code
= 1;
6597 internal_condition_case_1 (read_process_output_call
,
6599 Fcons (proc
, Fcons (reason
, Qnil
))),
6600 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6601 exec_sentinel_error_handler
);
6603 /* If we saved the match data nonrecursively, restore it now. */
6604 restore_search_regs ();
6605 running_asynch_code
= outer_running_asynch_code
;
6607 Vdeactivate_mark
= odeactivate
;
6609 /* Restore waiting_for_user_input_p as it was
6610 when we were called, in case the filter clobbered it. */
6611 waiting_for_user_input_p
= waiting
;
6614 if (! EQ (Fcurrent_buffer (), obuffer
)
6615 || ! EQ (current_buffer
->keymap
, okeymap
))
6617 /* But do it only if the caller is actually going to read events.
6618 Otherwise there's no need to make him wake up, and it could
6619 cause trouble (for example it would make sit_for return). */
6620 if (waiting_for_user_input_p
== -1)
6621 record_asynch_buffer_change ();
6623 unbind_to (count
, Qnil
);
6626 /* Report all recent events of a change in process status
6627 (either run the sentinel or output a message).
6628 This is usually done while Emacs is waiting for keyboard input
6629 but can be done at other times. */
6632 status_notify (struct Lisp_Process
*deleting_process
)
6634 register Lisp_Object proc
, buffer
;
6635 Lisp_Object tail
, msg
;
6636 struct gcpro gcpro1
, gcpro2
;
6640 /* We need to gcpro tail; if read_process_output calls a filter
6641 which deletes a process and removes the cons to which tail points
6642 from Vprocess_alist, and then causes a GC, tail is an unprotected
6646 /* Set this now, so that if new processes are created by sentinels
6647 that we run, we get called again to handle their status changes. */
6648 update_tick
= process_tick
;
6650 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6653 register struct Lisp_Process
*p
;
6655 proc
= Fcdr (XCAR (tail
));
6656 p
= XPROCESS (proc
);
6658 if (p
->tick
!= p
->update_tick
)
6660 p
->update_tick
= p
->tick
;
6662 /* If process is still active, read any output that remains. */
6663 while (! EQ (p
->filter
, Qt
)
6664 && ! EQ (p
->status
, Qconnect
)
6665 && ! EQ (p
->status
, Qlisten
)
6666 /* Network or serial process not stopped: */
6667 && ! EQ (p
->command
, Qt
)
6669 && p
!= deleting_process
6670 && read_process_output (proc
, p
->infd
) > 0);
6674 /* Get the text to use for the message. */
6675 if (p
->raw_status_new
)
6677 msg
= status_message (p
);
6679 /* If process is terminated, deactivate it or delete it. */
6681 if (CONSP (p
->status
))
6682 symbol
= XCAR (p
->status
);
6684 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6685 || EQ (symbol
, Qclosed
))
6687 if (delete_exited_processes
)
6688 remove_process (proc
);
6690 deactivate_process (proc
);
6693 /* The actions above may have further incremented p->tick.
6694 So set p->update_tick again
6695 so that an error in the sentinel will not cause
6696 this code to be run again. */
6697 p
->update_tick
= p
->tick
;
6698 /* Now output the message suitably. */
6699 if (!NILP (p
->sentinel
))
6700 exec_sentinel (proc
, msg
);
6701 /* Don't bother with a message in the buffer
6702 when a process becomes runnable. */
6703 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6706 struct buffer
*old
= current_buffer
;
6707 EMACS_INT opoint
, opoint_byte
;
6708 EMACS_INT before
, before_byte
;
6710 /* Avoid error if buffer is deleted
6711 (probably that's why the process is dead, too) */
6712 if (NILP (BVAR (XBUFFER (buffer
), name
)))
6714 Fset_buffer (buffer
);
6717 opoint_byte
= PT_BYTE
;
6718 /* Insert new output into buffer
6719 at the current end-of-output marker,
6720 thus preserving logical ordering of input and output. */
6721 if (XMARKER (p
->mark
)->buffer
)
6722 Fgoto_char (p
->mark
);
6724 SET_PT_BOTH (ZV
, ZV_BYTE
);
6727 before_byte
= PT_BYTE
;
6729 tem
= BVAR (current_buffer
, read_only
);
6730 BVAR (current_buffer
, read_only
) = Qnil
;
6731 insert_string ("\nProcess ");
6732 Finsert (1, &p
->name
);
6733 insert_string (" ");
6735 BVAR (current_buffer
, read_only
) = tem
;
6736 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6738 if (opoint
>= before
)
6739 SET_PT_BOTH (opoint
+ (PT
- before
),
6740 opoint_byte
+ (PT_BYTE
- before_byte
));
6742 SET_PT_BOTH (opoint
, opoint_byte
);
6744 set_buffer_internal (old
);
6749 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6754 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6755 Sset_process_coding_system
, 1, 3, 0,
6756 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6757 DECODING will be used to decode subprocess output and ENCODING to
6758 encode subprocess input. */)
6759 (register Lisp_Object process
, Lisp_Object decoding
, Lisp_Object encoding
)
6761 register struct Lisp_Process
*p
;
6763 CHECK_PROCESS (process
);
6764 p
= XPROCESS (process
);
6766 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6768 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6769 Fcheck_coding_system (decoding
);
6770 Fcheck_coding_system (encoding
);
6771 encoding
= coding_inherit_eol_type (encoding
, Qnil
);
6772 p
->decode_coding_system
= decoding
;
6773 p
->encode_coding_system
= encoding
;
6774 setup_process_coding_systems (process
);
6779 DEFUN ("process-coding-system",
6780 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6781 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6782 (register Lisp_Object process
)
6784 CHECK_PROCESS (process
);
6785 return Fcons (XPROCESS (process
)->decode_coding_system
,
6786 XPROCESS (process
)->encode_coding_system
);
6789 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6790 Sset_process_filter_multibyte
, 2, 2, 0,
6791 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6792 If FLAG is non-nil, the filter is given multibyte strings.
6793 If FLAG is nil, the filter is given unibyte strings. In this case,
6794 all character code conversion except for end-of-line conversion is
6796 (Lisp_Object process
, Lisp_Object flag
)
6798 register struct Lisp_Process
*p
;
6800 CHECK_PROCESS (process
);
6801 p
= XPROCESS (process
);
6803 p
->decode_coding_system
= raw_text_coding_system (p
->decode_coding_system
);
6804 setup_process_coding_systems (process
);
6809 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6810 Sprocess_filter_multibyte_p
, 1, 1, 0,
6811 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6812 (Lisp_Object process
)
6814 register struct Lisp_Process
*p
;
6815 struct coding_system
*coding
;
6817 CHECK_PROCESS (process
);
6818 p
= XPROCESS (process
);
6819 coding
= proc_decode_coding_system
[p
->infd
];
6820 return (CODING_FOR_UNIBYTE (coding
) ? Qnil
: Qt
);
6827 add_gpm_wait_descriptor (int desc
)
6829 add_keyboard_wait_descriptor (desc
);
6833 delete_gpm_wait_descriptor (int desc
)
6835 delete_keyboard_wait_descriptor (desc
);
6838 /* Return nonzero if *MASK has a bit set
6839 that corresponds to one of the keyboard input descriptors. */
6842 keyboard_bit_set (fd_set
*mask
)
6846 for (fd
= 0; fd
<= max_input_desc
; fd
++)
6847 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6848 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6854 #else /* not subprocesses */
6856 /* Defined on msdos.c. */
6857 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
6860 /* Implementation of wait_reading_process_output, assuming that there
6861 are no subprocesses. Used only by the MS-DOS build.
6863 Wait for timeout to elapse and/or keyboard input to be available.
6866 timeout in seconds, or
6867 zero for no limit, or
6868 -1 means gobble data immediately available but don't wait for any.
6870 read_kbd is a Lisp_Object:
6871 0 to ignore keyboard input, or
6872 1 to return when input is available, or
6873 -1 means caller will actually read the input, so don't throw to
6876 see full version for other parameters. We know that wait_proc will
6877 always be NULL, since `subprocesses' isn't defined.
6879 do_display != 0 means redisplay should be done to show subprocess
6880 output that arrives.
6882 Return true if we received input from any process. */
6885 wait_reading_process_output (int time_limit
, int microsecs
, int read_kbd
,
6887 Lisp_Object wait_for_cell
,
6888 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
6891 EMACS_TIME end_time
, timeout
;
6892 SELECT_TYPE waitchannels
;
6895 /* What does time_limit really mean? */
6896 if (time_limit
|| microsecs
)
6898 EMACS_GET_TIME (end_time
);
6899 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
6900 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6903 /* Turn off periodic alarms (in case they are in use)
6904 and then turn off any other atimers,
6905 because the select emulator uses alarms. */
6907 turn_on_atimers (0);
6911 int timeout_reduced_for_timers
= 0;
6913 /* If calling from keyboard input, do not quit
6914 since we want to return C-g as an input character.
6915 Otherwise, do pending quit if requested. */
6919 /* Exit now if the cell we're waiting for became non-nil. */
6920 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6923 /* Compute time from now till when time limit is up */
6924 /* Exit if already run out */
6925 if (time_limit
== -1)
6927 /* -1 specified for timeout means
6928 gobble output available now
6929 but don't wait at all. */
6931 EMACS_SET_SECS_USECS (timeout
, 0, 0);
6933 else if (time_limit
|| microsecs
)
6935 EMACS_GET_TIME (timeout
);
6936 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6937 if (EMACS_TIME_NEG_P (timeout
))
6942 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
6945 /* If our caller will not immediately handle keyboard events,
6946 run timer events directly.
6947 (Callers that will immediately read keyboard events
6948 call timer_delay on their own.) */
6949 if (NILP (wait_for_cell
))
6951 EMACS_TIME timer_delay
;
6955 int old_timers_run
= timers_run
;
6956 timer_delay
= timer_check (1);
6957 if (timers_run
!= old_timers_run
&& do_display
)
6958 /* We must retry, since a timer may have requeued itself
6959 and that could alter the time delay. */
6960 redisplay_preserve_echo_area (14);
6964 while (!detect_input_pending ());
6966 /* If there is unread keyboard input, also return. */
6968 && requeued_events_pending_p ())
6971 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
6973 EMACS_TIME difference
;
6974 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
6975 if (EMACS_TIME_NEG_P (difference
))
6977 timeout
= timer_delay
;
6978 timeout_reduced_for_timers
= 1;
6983 /* Cause C-g and alarm signals to take immediate action,
6984 and cause input available signals to zero out timeout. */
6986 set_waiting_for_input (&timeout
);
6988 /* Wait till there is something to do. */
6990 if (! read_kbd
&& NILP (wait_for_cell
))
6991 FD_ZERO (&waitchannels
);
6993 FD_SET (0, &waitchannels
);
6995 /* If a frame has been newly mapped and needs updating,
6996 reprocess its display stuff. */
6997 if (frame_garbaged
&& do_display
)
6999 clear_waiting_for_input ();
7000 redisplay_preserve_echo_area (15);
7002 set_waiting_for_input (&timeout
);
7005 if (read_kbd
&& detect_input_pending ())
7008 FD_ZERO (&waitchannels
);
7011 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
7016 /* Make C-g and alarm signals set flags again */
7017 clear_waiting_for_input ();
7019 /* If we woke up due to SIGWINCH, actually change size now. */
7020 do_pending_window_change (0);
7022 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
7023 /* We waited the full specified time, so return now. */
7028 /* If the system call was interrupted, then go around the
7030 if (xerrno
== EINTR
)
7031 FD_ZERO (&waitchannels
);
7033 error ("select error: %s", emacs_strerror (xerrno
));
7036 /* Check for keyboard input */
7039 && detect_input_pending_run_timers (do_display
))
7041 swallow_events (do_display
);
7042 if (detect_input_pending_run_timers (do_display
))
7046 /* If there is unread keyboard input, also return. */
7048 && requeued_events_pending_p ())
7051 /* If wait_for_cell. check for keyboard input
7052 but don't run any timers.
7053 ??? (It seems wrong to me to check for keyboard
7054 input at all when wait_for_cell, but the code
7055 has been this way since July 1994.
7056 Try changing this after version 19.31.) */
7057 if (! NILP (wait_for_cell
)
7058 && detect_input_pending ())
7060 swallow_events (do_display
);
7061 if (detect_input_pending ())
7065 /* Exit now if the cell we're waiting for became non-nil. */
7066 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7075 #endif /* not subprocesses */
7077 /* The following functions are needed even if async subprocesses are
7078 not supported. Some of them are no-op stubs in that case. */
7080 /* Add DESC to the set of keyboard input descriptors. */
7083 add_keyboard_wait_descriptor (int desc
)
7085 #ifdef subprocesses /* actually means "not MSDOS" */
7086 FD_SET (desc
, &input_wait_mask
);
7087 FD_SET (desc
, &non_process_wait_mask
);
7088 if (desc
> max_input_desc
)
7089 max_input_desc
= desc
;
7093 /* From now on, do not expect DESC to give keyboard input. */
7096 delete_keyboard_wait_descriptor (int desc
)
7100 int lim
= max_input_desc
;
7102 FD_CLR (desc
, &input_wait_mask
);
7103 FD_CLR (desc
, &non_process_wait_mask
);
7105 if (desc
== max_input_desc
)
7106 for (fd
= 0; fd
< lim
; fd
++)
7107 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
7108 max_input_desc
= fd
;
7112 /* Setup coding systems of PROCESS. */
7115 setup_process_coding_systems (Lisp_Object process
)
7118 struct Lisp_Process
*p
= XPROCESS (process
);
7120 int outch
= p
->outfd
;
7121 Lisp_Object coding_system
;
7123 if (inch
< 0 || outch
< 0)
7126 if (!proc_decode_coding_system
[inch
])
7127 proc_decode_coding_system
[inch
]
7128 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
7129 coding_system
= p
->decode_coding_system
;
7130 if (! NILP (p
->filter
))
7132 else if (BUFFERP (p
->buffer
))
7134 if (NILP (BVAR (XBUFFER (p
->buffer
), enable_multibyte_characters
)))
7135 coding_system
= raw_text_coding_system (coding_system
);
7137 setup_coding_system (coding_system
, proc_decode_coding_system
[inch
]);
7139 if (!proc_encode_coding_system
[outch
])
7140 proc_encode_coding_system
[outch
]
7141 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
7142 setup_coding_system (p
->encode_coding_system
,
7143 proc_encode_coding_system
[outch
]);
7147 /* Close all descriptors currently in use for communication
7148 with subprocess. This is used in a newly-forked subprocess
7149 to get rid of irrelevant descriptors. */
7152 close_process_descs (void)
7156 for (i
= 0; i
< MAXDESC
; i
++)
7158 Lisp_Object process
;
7159 process
= chan_process
[i
];
7160 if (!NILP (process
))
7162 int in
= XPROCESS (process
)->infd
;
7163 int out
= XPROCESS (process
)->outfd
;
7166 if (out
>= 0 && in
!= out
)
7173 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7174 doc
: /* Return the (or a) process associated with BUFFER.
7175 BUFFER may be a buffer or the name of one. */)
7176 (register Lisp_Object buffer
)
7179 register Lisp_Object buf
, tail
, proc
;
7181 if (NILP (buffer
)) return Qnil
;
7182 buf
= Fget_buffer (buffer
);
7183 if (NILP (buf
)) return Qnil
;
7185 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7187 proc
= Fcdr (XCAR (tail
));
7188 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
7191 #endif /* subprocesses */
7195 DEFUN ("process-inherit-coding-system-flag",
7196 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7198 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
7199 If this flag is t, `buffer-file-coding-system' of the buffer
7200 associated with PROCESS will inherit the coding system used to decode
7201 the process output. */)
7202 (register Lisp_Object process
)
7205 CHECK_PROCESS (process
);
7206 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
7208 /* Ignore the argument and return the value of
7209 inherit-process-coding-system. */
7210 return inherit_process_coding_system
? Qt
: Qnil
;
7214 /* Kill all processes associated with `buffer'.
7215 If `buffer' is nil, kill all processes */
7218 kill_buffer_processes (Lisp_Object buffer
)
7221 Lisp_Object tail
, proc
;
7223 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7225 proc
= XCDR (XCAR (tail
));
7227 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
7229 if (NETCONN_P (proc
) || SERIALCONN_P (proc
))
7230 Fdelete_process (proc
);
7231 else if (XPROCESS (proc
)->infd
>= 0)
7232 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
7235 #else /* subprocesses */
7236 /* Since we have no subprocesses, this does nothing. */
7237 #endif /* subprocesses */
7240 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
7242 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
7243 This is intended for use by asynchronous process output filters and sentinels. */)
7247 return (waiting_for_user_input_p
? Qt
: Qnil
);
7253 /* Stop reading input from keyboard sources. */
7256 hold_keyboard_input (void)
7261 /* Resume reading input from keyboard sources. */
7264 unhold_keyboard_input (void)
7269 /* Return non-zero if keyboard input is on hold, zero otherwise. */
7272 kbd_on_hold_p (void)
7274 return kbd_is_on_hold
;
7278 /* Enumeration of and access to system processes a-la ps(1). */
7280 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
7282 doc
: /* Return a list of numerical process IDs of all running processes.
7283 If this functionality is unsupported, return nil.
7285 See `process-attributes' for getting attributes of a process given its ID. */)
7288 return list_system_processes ();
7291 DEFUN ("process-attributes", Fprocess_attributes
,
7292 Sprocess_attributes
, 1, 1, 0,
7293 doc
: /* Return attributes of the process given by its PID, a number.
7295 Value is an alist where each element is a cons cell of the form
7299 If this functionality is unsupported, the value is nil.
7301 See `list-system-processes' for getting a list of all process IDs.
7303 The KEYs of the attributes that this function may return are listed
7304 below, together with the type of the associated VALUE (in parentheses).
7305 Not all platforms support all of these attributes; unsupported
7306 attributes will not appear in the returned alist.
7307 Unless explicitly indicated otherwise, numbers can have either
7308 integer or floating point values.
7310 euid -- Effective user User ID of the process (number)
7311 user -- User name corresponding to euid (string)
7312 egid -- Effective user Group ID of the process (number)
7313 group -- Group name corresponding to egid (string)
7314 comm -- Command name (executable name only) (string)
7315 state -- Process state code, such as "S", "R", or "T" (string)
7316 ppid -- Parent process ID (number)
7317 pgrp -- Process group ID (number)
7318 sess -- Session ID, i.e. process ID of session leader (number)
7319 ttname -- Controlling tty name (string)
7320 tpgid -- ID of foreground process group on the process's tty (number)
7321 minflt -- number of minor page faults (number)
7322 majflt -- number of major page faults (number)
7323 cminflt -- cumulative number of minor page faults (number)
7324 cmajflt -- cumulative number of major page faults (number)
7325 utime -- user time used by the process, in the (HIGH LOW USEC) format
7326 stime -- system time used by the process, in the (HIGH LOW USEC) format
7327 time -- sum of utime and stime, in the (HIGH LOW USEC) format
7328 cutime -- user time used by the process and its children, (HIGH LOW USEC)
7329 cstime -- system time used by the process and its children, (HIGH LOW USEC)
7330 ctime -- sum of cutime and cstime, in the (HIGH LOW USEC) format
7331 pri -- priority of the process (number)
7332 nice -- nice value of the process (number)
7333 thcount -- process thread count (number)
7334 start -- time the process started, in the (HIGH LOW USEC) format
7335 vsize -- virtual memory size of the process in KB's (number)
7336 rss -- resident set size of the process in KB's (number)
7337 etime -- elapsed time the process is running, in (HIGH LOW USEC) format
7338 pcpu -- percents of CPU time used by the process (floating-point number)
7339 pmem -- percents of total physical memory used by process's resident set
7340 (floating-point number)
7341 args -- command line which invoked the process (string). */)
7344 return system_process_attributes (pid
);
7354 inhibit_sentinels
= 0;
7358 if (! noninteractive
|| initialized
)
7360 signal (SIGCHLD
, sigchld_handler
);
7363 FD_ZERO (&input_wait_mask
);
7364 FD_ZERO (&non_keyboard_wait_mask
);
7365 FD_ZERO (&non_process_wait_mask
);
7366 FD_ZERO (&write_mask
);
7367 max_process_desc
= 0;
7368 memset (fd_callback_info
, 0, sizeof (fd_callback_info
));
7370 #ifdef NON_BLOCKING_CONNECT
7371 FD_ZERO (&connect_wait_mask
);
7372 num_pending_connects
= 0;
7375 #ifdef ADAPTIVE_READ_BUFFERING
7376 process_output_delay_count
= 0;
7377 process_output_skip
= 0;
7380 /* Don't do this, it caused infinite select loops. The display
7381 method should call add_keyboard_wait_descriptor on stdin if it
7384 FD_SET (0, &input_wait_mask
);
7387 Vprocess_alist
= Qnil
;
7389 deleted_pid_list
= Qnil
;
7391 for (i
= 0; i
< MAXDESC
; i
++)
7393 chan_process
[i
] = Qnil
;
7394 proc_buffered_char
[i
] = -1;
7396 memset (proc_decode_coding_system
, 0, sizeof proc_decode_coding_system
);
7397 memset (proc_encode_coding_system
, 0, sizeof proc_encode_coding_system
);
7398 #ifdef DATAGRAM_SOCKETS
7399 memset (datagram_address
, 0, sizeof datagram_address
);
7403 Lisp_Object subfeatures
= Qnil
;
7404 const struct socket_options
*sopt
;
7406 #define ADD_SUBFEATURE(key, val) \
7407 subfeatures = pure_cons (pure_cons (key, pure_cons (val, Qnil)), subfeatures)
7409 #ifdef NON_BLOCKING_CONNECT
7410 ADD_SUBFEATURE (QCnowait
, Qt
);
7412 #ifdef DATAGRAM_SOCKETS
7413 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7415 #ifdef HAVE_SEQPACKET
7416 ADD_SUBFEATURE (QCtype
, Qseqpacket
);
7418 #ifdef HAVE_LOCAL_SOCKETS
7419 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7421 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7423 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7425 #ifdef HAVE_GETSOCKNAME
7426 ADD_SUBFEATURE (QCservice
, Qt
);
7428 #if defined(O_NONBLOCK) || defined(O_NDELAY)
7429 ADD_SUBFEATURE (QCserver
, Qt
);
7432 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7433 subfeatures
= pure_cons (intern_c_string (sopt
->name
), subfeatures
);
7435 Fprovide (intern_c_string ("make-network-process"), subfeatures
);
7438 #if defined (DARWIN_OS)
7439 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7440 processes. As such, we only change the default value. */
7443 const char *release
= get_operating_system_release ();
7444 if (!release
|| !release
[0] || (release
[0] < MIN_PTY_KERNEL_VERSION
7445 && release
[1] == '.')) {
7446 Vprocess_connection_type
= Qnil
;
7450 #endif /* subprocesses */
7455 syms_of_process (void)
7459 Qprocessp
= intern_c_string ("processp");
7460 staticpro (&Qprocessp
);
7461 Qrun
= intern_c_string ("run");
7463 Qstop
= intern_c_string ("stop");
7465 Qsignal
= intern_c_string ("signal");
7466 staticpro (&Qsignal
);
7468 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7471 Qexit = intern_c_string ("exit");
7472 staticpro (&Qexit); */
7474 Qopen
= intern_c_string ("open");
7476 Qclosed
= intern_c_string ("closed");
7477 staticpro (&Qclosed
);
7478 Qconnect
= intern_c_string ("connect");
7479 staticpro (&Qconnect
);
7480 Qfailed
= intern_c_string ("failed");
7481 staticpro (&Qfailed
);
7482 Qlisten
= intern_c_string ("listen");
7483 staticpro (&Qlisten
);
7484 Qlocal
= intern_c_string ("local");
7485 staticpro (&Qlocal
);
7486 Qipv4
= intern_c_string ("ipv4");
7489 Qipv6
= intern_c_string ("ipv6");
7492 Qdatagram
= intern_c_string ("datagram");
7493 staticpro (&Qdatagram
);
7494 Qseqpacket
= intern_c_string ("seqpacket");
7495 staticpro (&Qseqpacket
);
7497 QCport
= intern_c_string (":port");
7498 staticpro (&QCport
);
7499 QCspeed
= intern_c_string (":speed");
7500 staticpro (&QCspeed
);
7501 QCprocess
= intern_c_string (":process");
7502 staticpro (&QCprocess
);
7504 QCbytesize
= intern_c_string (":bytesize");
7505 staticpro (&QCbytesize
);
7506 QCstopbits
= intern_c_string (":stopbits");
7507 staticpro (&QCstopbits
);
7508 QCparity
= intern_c_string (":parity");
7509 staticpro (&QCparity
);
7510 Qodd
= intern_c_string ("odd");
7512 Qeven
= intern_c_string ("even");
7514 QCflowcontrol
= intern_c_string (":flowcontrol");
7515 staticpro (&QCflowcontrol
);
7516 Qhw
= intern_c_string ("hw");
7518 Qsw
= intern_c_string ("sw");
7520 QCsummary
= intern_c_string (":summary");
7521 staticpro (&QCsummary
);
7523 Qreal
= intern_c_string ("real");
7525 Qnetwork
= intern_c_string ("network");
7526 staticpro (&Qnetwork
);
7527 Qserial
= intern_c_string ("serial");
7528 staticpro (&Qserial
);
7529 QCbuffer
= intern_c_string (":buffer");
7530 staticpro (&QCbuffer
);
7531 QChost
= intern_c_string (":host");
7532 staticpro (&QChost
);
7533 QCservice
= intern_c_string (":service");
7534 staticpro (&QCservice
);
7535 QClocal
= intern_c_string (":local");
7536 staticpro (&QClocal
);
7537 QCremote
= intern_c_string (":remote");
7538 staticpro (&QCremote
);
7539 QCcoding
= intern_c_string (":coding");
7540 staticpro (&QCcoding
);
7541 QCserver
= intern_c_string (":server");
7542 staticpro (&QCserver
);
7543 QCnowait
= intern_c_string (":nowait");
7544 staticpro (&QCnowait
);
7545 QCsentinel
= intern_c_string (":sentinel");
7546 staticpro (&QCsentinel
);
7547 QClog
= intern_c_string (":log");
7549 QCnoquery
= intern_c_string (":noquery");
7550 staticpro (&QCnoquery
);
7551 QCstop
= intern_c_string (":stop");
7552 staticpro (&QCstop
);
7553 QCoptions
= intern_c_string (":options");
7554 staticpro (&QCoptions
);
7555 QCplist
= intern_c_string (":plist");
7556 staticpro (&QCplist
);
7558 Qlast_nonmenu_event
= intern_c_string ("last-nonmenu-event");
7559 staticpro (&Qlast_nonmenu_event
);
7561 staticpro (&Vprocess_alist
);
7563 staticpro (&deleted_pid_list
);
7566 #endif /* subprocesses */
7568 QCname
= intern_c_string (":name");
7569 staticpro (&QCname
);
7570 QCtype
= intern_c_string (":type");
7571 staticpro (&QCtype
);
7573 Qeuid
= intern_c_string ("euid");
7575 Qegid
= intern_c_string ("egid");
7577 Quser
= intern_c_string ("user");
7579 Qgroup
= intern_c_string ("group");
7580 staticpro (&Qgroup
);
7581 Qcomm
= intern_c_string ("comm");
7583 Qstate
= intern_c_string ("state");
7584 staticpro (&Qstate
);
7585 Qppid
= intern_c_string ("ppid");
7587 Qpgrp
= intern_c_string ("pgrp");
7589 Qsess
= intern_c_string ("sess");
7591 Qttname
= intern_c_string ("ttname");
7592 staticpro (&Qttname
);
7593 Qtpgid
= intern_c_string ("tpgid");
7594 staticpro (&Qtpgid
);
7595 Qminflt
= intern_c_string ("minflt");
7596 staticpro (&Qminflt
);
7597 Qmajflt
= intern_c_string ("majflt");
7598 staticpro (&Qmajflt
);
7599 Qcminflt
= intern_c_string ("cminflt");
7600 staticpro (&Qcminflt
);
7601 Qcmajflt
= intern_c_string ("cmajflt");
7602 staticpro (&Qcmajflt
);
7603 Qutime
= intern_c_string ("utime");
7604 staticpro (&Qutime
);
7605 Qstime
= intern_c_string ("stime");
7606 staticpro (&Qstime
);
7607 Qtime
= intern_c_string ("time");
7609 Qcutime
= intern_c_string ("cutime");
7610 staticpro (&Qcutime
);
7611 Qcstime
= intern_c_string ("cstime");
7612 staticpro (&Qcstime
);
7613 Qctime
= intern_c_string ("ctime");
7614 staticpro (&Qctime
);
7615 Qpri
= intern_c_string ("pri");
7617 Qnice
= intern_c_string ("nice");
7619 Qthcount
= intern_c_string ("thcount");
7620 staticpro (&Qthcount
);
7621 Qstart
= intern_c_string ("start");
7622 staticpro (&Qstart
);
7623 Qvsize
= intern_c_string ("vsize");
7624 staticpro (&Qvsize
);
7625 Qrss
= intern_c_string ("rss");
7627 Qetime
= intern_c_string ("etime");
7628 staticpro (&Qetime
);
7629 Qpcpu
= intern_c_string ("pcpu");
7631 Qpmem
= intern_c_string ("pmem");
7633 Qargs
= intern_c_string ("args");
7636 DEFVAR_BOOL ("delete-exited-processes", delete_exited_processes
,
7637 doc
: /* *Non-nil means delete processes immediately when they exit.
7638 A value of nil means don't delete them until `list-processes' is run. */);
7640 delete_exited_processes
= 1;
7643 DEFVAR_LISP ("process-connection-type", Vprocess_connection_type
,
7644 doc
: /* Control type of device used to communicate with subprocesses.
7645 Values are nil to use a pipe, or t or `pty' to use a pty.
7646 The value has no effect if the system has no ptys or if all ptys are busy:
7647 then a pipe is used in any case.
7648 The value takes effect when `start-process' is called. */);
7649 Vprocess_connection_type
= Qt
;
7651 #ifdef ADAPTIVE_READ_BUFFERING
7652 DEFVAR_LISP ("process-adaptive-read-buffering", Vprocess_adaptive_read_buffering
,
7653 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7654 On some systems, when Emacs reads the output from a subprocess, the output data
7655 is read in very small blocks, potentially resulting in very poor performance.
7656 This behavior can be remedied to some extent by setting this variable to a
7657 non-nil value, as it will automatically delay reading from such processes, to
7658 allow them to produce more output before Emacs tries to read it.
7659 If the value is t, the delay is reset after each write to the process; any other
7660 non-nil value means that the delay is not reset on write.
7661 The variable takes effect when `start-process' is called. */);
7662 Vprocess_adaptive_read_buffering
= Qt
;
7665 defsubr (&Sprocessp
);
7666 defsubr (&Sget_process
);
7667 defsubr (&Sdelete_process
);
7668 defsubr (&Sprocess_status
);
7669 defsubr (&Sprocess_exit_status
);
7670 defsubr (&Sprocess_id
);
7671 defsubr (&Sprocess_name
);
7672 defsubr (&Sprocess_tty_name
);
7673 defsubr (&Sprocess_command
);
7674 defsubr (&Sset_process_buffer
);
7675 defsubr (&Sprocess_buffer
);
7676 defsubr (&Sprocess_mark
);
7677 defsubr (&Sset_process_filter
);
7678 defsubr (&Sprocess_filter
);
7679 defsubr (&Sset_process_sentinel
);
7680 defsubr (&Sprocess_sentinel
);
7681 defsubr (&Sset_process_window_size
);
7682 defsubr (&Sset_process_inherit_coding_system_flag
);
7683 defsubr (&Sset_process_query_on_exit_flag
);
7684 defsubr (&Sprocess_query_on_exit_flag
);
7685 defsubr (&Sprocess_contact
);
7686 defsubr (&Sprocess_plist
);
7687 defsubr (&Sset_process_plist
);
7688 defsubr (&Slist_processes
);
7689 defsubr (&Sprocess_list
);
7690 defsubr (&Sstart_process
);
7691 defsubr (&Sserial_process_configure
);
7692 defsubr (&Smake_serial_process
);
7693 defsubr (&Sset_network_process_option
);
7694 defsubr (&Smake_network_process
);
7695 defsubr (&Sformat_network_address
);
7696 #if defined(HAVE_NET_IF_H)
7698 defsubr (&Snetwork_interface_list
);
7700 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
7701 defsubr (&Snetwork_interface_info
);
7703 #endif /* defined(HAVE_NET_IF_H) */
7704 #ifdef DATAGRAM_SOCKETS
7705 defsubr (&Sprocess_datagram_address
);
7706 defsubr (&Sset_process_datagram_address
);
7708 defsubr (&Saccept_process_output
);
7709 defsubr (&Sprocess_send_region
);
7710 defsubr (&Sprocess_send_string
);
7711 defsubr (&Sinterrupt_process
);
7712 defsubr (&Skill_process
);
7713 defsubr (&Squit_process
);
7714 defsubr (&Sstop_process
);
7715 defsubr (&Scontinue_process
);
7716 defsubr (&Sprocess_running_child_p
);
7717 defsubr (&Sprocess_send_eof
);
7718 defsubr (&Ssignal_process
);
7719 defsubr (&Swaiting_for_user_input_p
);
7720 defsubr (&Sprocess_type
);
7721 defsubr (&Sset_process_coding_system
);
7722 defsubr (&Sprocess_coding_system
);
7723 defsubr (&Sset_process_filter_multibyte
);
7724 defsubr (&Sprocess_filter_multibyte_p
);
7726 #endif /* subprocesses */
7728 defsubr (&Sget_buffer_process
);
7729 defsubr (&Sprocess_inherit_coding_system_flag
);
7730 defsubr (&Slist_system_processes
);
7731 defsubr (&Sprocess_attributes
);