1 /* Asynchronous subprocess control for GNU Emacs.
2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 96, 98, 1999,
3 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
26 /* This file is split into two parts by the following preprocessor
27 conditional. The 'then' clause contains all of the support for
28 asynchronous subprocesses. The 'else' clause contains stub
29 versions of some of the asynchronous subprocess routines that are
30 often called elsewhere in Emacs, so we don't have to #ifdef the
31 sections that call them. */
39 #include <sys/types.h> /* some typedefs are used in sys/file.h */
46 #if defined(WINDOWSNT) || defined(UNIX98_PTYS)
49 #endif /* not WINDOWSNT */
51 #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */
52 #include <sys/socket.h>
54 #include <netinet/in.h>
55 #include <arpa/inet.h>
56 #ifdef NEED_NET_ERRNO_H
57 #include <net/errno.h>
58 #endif /* NEED_NET_ERRNO_H */
60 /* Are local (unix) sockets supported? */
61 #if defined (HAVE_SYS_UN_H) && !defined (NO_SOCKETS_IN_FILE_SYSTEM)
62 #if !defined (AF_LOCAL) && defined (AF_UNIX)
63 #define AF_LOCAL AF_UNIX
66 #define HAVE_LOCAL_SOCKETS
70 #endif /* HAVE_SOCKETS */
72 /* TERM is a poor-man's SLIP, used on GNU/Linux. */
77 /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */
78 #ifdef HAVE_BROKEN_INET_ADDR
79 #define IN_ADDR struct in_addr
80 #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1)
82 #define IN_ADDR unsigned long
83 #define NUMERIC_ADDR_ERROR (numeric_addr == -1)
86 #if defined(BSD_SYSTEM) || defined(STRIDE)
87 #include <sys/ioctl.h>
88 #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5)
90 #endif /* HAVE_PTYS and no O_NDELAY */
91 #endif /* BSD_SYSTEM || STRIDE */
93 #ifdef BROKEN_O_NONBLOCK
95 #endif /* BROKEN_O_NONBLOCK */
101 /* Can we use SIOCGIFCONF and/or SIOCGIFADDR */
103 #if defined(HAVE_SYS_IOCTL_H) && defined(HAVE_NET_IF_H)
104 /* sys/ioctl.h may have been included already */
106 #include <sys/ioctl.h>
113 #include <sys/sysmacros.h> /* for "minor" */
114 #endif /* not IRIS */
117 #include <sys/wait.h>
126 #include "character.h"
129 #include "termhooks.h"
130 #include "termopts.h"
131 #include "commands.h"
132 #include "keyboard.h"
134 #include "blockinput.h"
135 #include "dispextern.h"
136 #include "composite.h"
139 Lisp_Object Qprocessp
;
140 Lisp_Object Qrun
, Qstop
, Qsignal
;
141 Lisp_Object Qopen
, Qclosed
, Qconnect
, Qfailed
, Qlisten
;
142 Lisp_Object Qlocal
, Qdatagram
;
143 Lisp_Object QCname
, QCbuffer
, QChost
, QCservice
, QCtype
;
144 Lisp_Object QClocal
, QCremote
, QCcoding
;
145 Lisp_Object QCserver
, QCnowait
, QCnoquery
, QCstop
;
146 Lisp_Object QCsentinel
, QClog
, QCoptions
, QCplist
;
147 Lisp_Object QCfilter_multibyte
;
148 Lisp_Object Qlast_nonmenu_event
;
149 /* QCfamily is declared and initialized in xfaces.c,
150 QCfilter in keyboard.c. */
151 extern Lisp_Object QCfamily
, QCfilter
;
153 /* Qexit is declared and initialized in eval.c. */
155 /* QCfamily is defined in xfaces.c. */
156 extern Lisp_Object QCfamily
;
157 /* QCfilter is defined in keyboard.c. */
158 extern Lisp_Object QCfilter
;
160 /* a process object is a network connection when its childp field is neither
161 Qt nor Qnil but is instead a property list (KEY VAL ...). */
164 #define NETCONN_P(p) (GC_CONSP (XPROCESS (p)->childp))
165 #define NETCONN1_P(p) (GC_CONSP ((p)->childp))
167 #define NETCONN_P(p) 0
168 #define NETCONN1_P(p) 0
169 #endif /* HAVE_SOCKETS */
171 /* Define first descriptor number available for subprocesses. */
173 #define FIRST_PROC_DESC 1
175 #define FIRST_PROC_DESC 3
178 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
181 #if !defined (SIGCHLD) && defined (SIGCLD)
182 #define SIGCHLD SIGCLD
185 #include "syssignal.h"
189 extern void set_waiting_for_input
P_ ((EMACS_TIME
*));
190 extern char *get_operating_system_release ();
196 extern char *sys_errlist
[];
203 /* t means use pty, nil means use a pipe,
204 maybe other values to come. */
205 static Lisp_Object Vprocess_connection_type
;
209 #include <sys/socket.h>
213 /* These next two vars are non-static since sysdep.c uses them in the
214 emulation of `select'. */
215 /* Number of events of change of status of a process. */
217 /* Number of events for which the user or sentinel has been notified. */
220 /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */
222 #ifdef BROKEN_NON_BLOCKING_CONNECT
223 #undef NON_BLOCKING_CONNECT
225 #ifndef NON_BLOCKING_CONNECT
228 #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX)
229 #if defined (O_NONBLOCK) || defined (O_NDELAY)
230 #if defined (EWOULDBLOCK) || defined (EINPROGRESS)
231 #define NON_BLOCKING_CONNECT
232 #endif /* EWOULDBLOCK || EINPROGRESS */
233 #endif /* O_NONBLOCK || O_NDELAY */
234 #endif /* HAVE_GETPEERNAME || GNU_LINUX */
235 #endif /* HAVE_SELECT */
236 #endif /* HAVE_SOCKETS */
237 #endif /* NON_BLOCKING_CONNECT */
238 #endif /* BROKEN_NON_BLOCKING_CONNECT */
240 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
241 this system. We need to read full packets, so we need a
242 "non-destructive" select. So we require either native select,
243 or emulation of select using FIONREAD. */
245 #ifdef BROKEN_DATAGRAM_SOCKETS
246 #undef DATAGRAM_SOCKETS
248 #ifndef DATAGRAM_SOCKETS
250 #if defined (HAVE_SELECT) || defined (FIONREAD)
251 #if defined (HAVE_SENDTO) && defined (HAVE_RECVFROM) && defined (EMSGSIZE)
252 #define DATAGRAM_SOCKETS
253 #endif /* HAVE_SENDTO && HAVE_RECVFROM && EMSGSIZE */
254 #endif /* HAVE_SELECT || FIONREAD */
255 #endif /* HAVE_SOCKETS */
256 #endif /* DATAGRAM_SOCKETS */
257 #endif /* BROKEN_DATAGRAM_SOCKETS */
260 #undef NON_BLOCKING_CONNECT
261 #undef DATAGRAM_SOCKETS
264 #if !defined (ADAPTIVE_READ_BUFFERING) && !defined (NO_ADAPTIVE_READ_BUFFERING)
265 #ifdef EMACS_HAS_USECS
266 #define ADAPTIVE_READ_BUFFERING
270 #ifdef ADAPTIVE_READ_BUFFERING
271 #define READ_OUTPUT_DELAY_INCREMENT 10000
272 #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5)
273 #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7)
275 /* Number of processes which might be delayed. */
277 static int process_output_delay_count
;
279 /* Non-zero if any process has non-nil process_output_skip. */
281 static int process_output_skip
;
283 /* Non-nil means to delay reading process output to improve buffering.
284 A value of t means that delay is reset after each send, any other
285 non-nil value does not reset the delay. */
286 static Lisp_Object Vprocess_adaptive_read_buffering
;
288 #define process_output_delay_count 0
292 #include "sysselect.h"
294 extern int keyboard_bit_set
P_ ((SELECT_TYPE
*));
296 /* If we support a window system, turn on the code to poll periodically
297 to detect C-g. It isn't actually used when doing interrupt input. */
298 #ifdef HAVE_WINDOW_SYSTEM
299 #define POLL_FOR_INPUT
302 /* Mask of bits indicating the descriptors that we wait for input on. */
304 static SELECT_TYPE input_wait_mask
;
306 /* Mask that excludes keyboard input descriptor (s). */
308 static SELECT_TYPE non_keyboard_wait_mask
;
310 /* Mask that excludes process input descriptor (s). */
312 static SELECT_TYPE non_process_wait_mask
;
314 #ifdef NON_BLOCKING_CONNECT
315 /* Mask of bits indicating the descriptors that we wait for connect to
316 complete on. Once they complete, they are removed from this mask
317 and added to the input_wait_mask and non_keyboard_wait_mask. */
319 static SELECT_TYPE connect_wait_mask
;
321 /* Number of bits set in connect_wait_mask. */
322 static int num_pending_connects
;
324 #define IF_NON_BLOCKING_CONNECT(s) s
326 #define IF_NON_BLOCKING_CONNECT(s)
329 /* The largest descriptor currently in use for a process object. */
330 static int max_process_desc
;
332 /* The largest descriptor currently in use for keyboard input. */
333 static int max_keyboard_desc
;
335 /* Nonzero means delete a process right away if it exits. */
336 static int delete_exited_processes
;
338 /* Indexed by descriptor, gives the process (if any) for that descriptor */
339 Lisp_Object chan_process
[MAXDESC
];
341 /* Alist of elements (NAME . PROCESS) */
342 Lisp_Object Vprocess_alist
;
344 /* Buffered-ahead input char from process, indexed by channel.
345 -1 means empty (no char is buffered).
346 Used on sys V where the only way to tell if there is any
347 output from the process is to read at least one char.
348 Always -1 on systems that support FIONREAD. */
350 /* Don't make static; need to access externally. */
351 int proc_buffered_char
[MAXDESC
];
353 /* Table of `struct coding-system' for each process. */
354 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
355 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
357 #ifdef DATAGRAM_SOCKETS
358 /* Table of `partner address' for datagram sockets. */
359 struct sockaddr_and_len
{
362 } datagram_address
[MAXDESC
];
363 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
364 #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XINT (XPROCESS (proc)->infd)].sa != 0)
366 #define DATAGRAM_CHAN_P(chan) (0)
367 #define DATAGRAM_CONN_P(proc) (0)
370 static Lisp_Object
get_process ();
371 static void exec_sentinel ();
373 extern EMACS_TIME
timer_check ();
374 extern int timers_run
;
376 /* Maximum number of bytes to send to a pty without an eof. */
377 static int pty_max_bytes
;
379 extern Lisp_Object Vfile_name_coding_system
, Vdefault_file_name_coding_system
;
385 /* The file name of the pty opened by allocate_pty. */
387 static char pty_name
[24];
390 /* Compute the Lisp form of the process status, p->status, from
391 the numeric status that was returned by `wait'. */
393 Lisp_Object
status_convert ();
397 struct Lisp_Process
*p
;
399 union { int i
; WAITTYPE wt
; } u
;
400 u
.i
= XFASTINT (p
->raw_status_low
) + (XFASTINT (p
->raw_status_high
) << 16);
401 p
->status
= status_convert (u
.wt
);
402 p
->raw_status_low
= Qnil
;
403 p
->raw_status_high
= Qnil
;
406 /* Convert a process status word in Unix format to
407 the list that we use internally. */
414 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
415 else if (WIFEXITED (w
))
416 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
417 WCOREDUMP (w
) ? Qt
: Qnil
));
418 else if (WIFSIGNALED (w
))
419 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
420 WCOREDUMP (w
) ? Qt
: Qnil
));
425 /* Given a status-list, extract the three pieces of information
426 and store them individually through the three pointers. */
429 decode_status (l
, symbol
, code
, coredump
)
447 *code
= XFASTINT (XCAR (tem
));
449 *coredump
= !NILP (tem
);
453 /* Return a string describing a process status list. */
457 struct Lisp_Process
*p
;
459 Lisp_Object status
= p
->status
;
462 Lisp_Object string
, string2
;
464 decode_status (status
, &symbol
, &code
, &coredump
);
466 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
469 synchronize_system_messages_locale ();
470 signame
= strsignal (code
);
473 string
= build_string (signame
);
474 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
475 SSET (string
, 0, DOWNCASE (SREF (string
, 0)));
476 return concat2 (string
, string2
);
478 else if (EQ (symbol
, Qexit
))
481 return build_string (code
== 0 ? "deleted\n" : "connection broken by remote peer\n");
483 return build_string ("finished\n");
484 string
= Fnumber_to_string (make_number (code
));
485 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
486 return concat3 (build_string ("exited abnormally with code "),
489 else if (EQ (symbol
, Qfailed
))
491 string
= Fnumber_to_string (make_number (code
));
492 string2
= build_string ("\n");
493 return concat3 (build_string ("failed with code "),
497 return Fcopy_sequence (Fsymbol_name (symbol
));
502 /* Open an available pty, returning a file descriptor.
503 Return -1 on failure.
504 The file name of the terminal corresponding to the pty
505 is left in the variable pty_name. */
516 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
517 for (i
= 0; i
< 16; i
++)
520 struct stat stb
; /* Used in some PTY_OPEN. */
521 #ifdef PTY_NAME_SPRINTF
524 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
525 #endif /* no PTY_NAME_SPRINTF */
529 #else /* no PTY_OPEN */
532 /* Unusual IRIS code */
533 *ptyv
= emacs_open ("/dev/ptc", O_RDWR
| O_NDELAY
, 0);
536 if (fstat (fd
, &stb
) < 0)
538 # else /* not IRIS */
539 { /* Some systems name their pseudoterminals so that there are gaps in
540 the usual sequence - for example, on HP9000/S700 systems, there
541 are no pseudoterminals with names ending in 'f'. So we wait for
542 three failures in a row before deciding that we've reached the
544 int failed_count
= 0;
546 if (stat (pty_name
, &stb
) < 0)
549 if (failed_count
>= 3)
556 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
558 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
560 # endif /* not IRIS */
562 #endif /* no PTY_OPEN */
566 /* check to make certain that both sides are available
567 this avoids a nasty yet stupid bug in rlogins */
568 #ifdef PTY_TTY_NAME_SPRINTF
571 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
572 #endif /* no PTY_TTY_NAME_SPRINTF */
574 if (access (pty_name
, 6) != 0)
577 # if !defined(IRIS) && !defined(__sgi)
583 #endif /* not UNIPLUS */
590 #endif /* HAVE_PTYS */
596 register Lisp_Object val
, tem
, name1
;
597 register struct Lisp_Process
*p
;
601 p
= allocate_process ();
603 XSETINT (p
->infd
, -1);
604 XSETINT (p
->outfd
, -1);
605 XSETFASTINT (p
->pid
, 0);
606 XSETFASTINT (p
->tick
, 0);
607 XSETFASTINT (p
->update_tick
, 0);
608 p
->raw_status_low
= Qnil
;
609 p
->raw_status_high
= Qnil
;
611 p
->mark
= Fmake_marker ();
613 #ifdef ADAPTIVE_READ_BUFFERING
614 p
->adaptive_read_buffering
= Qnil
;
615 XSETFASTINT (p
->read_output_delay
, 0);
616 p
->read_output_skip
= Qnil
;
619 /* If name is already in use, modify it until it is unused. */
624 tem
= Fget_process (name1
);
625 if (NILP (tem
)) break;
626 sprintf (suffix
, "<%d>", i
);
627 name1
= concat2 (name
, build_string (suffix
));
631 XSETPROCESS (val
, p
);
632 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
637 remove_process (proc
)
638 register Lisp_Object proc
;
640 register Lisp_Object pair
;
642 pair
= Frassq (proc
, Vprocess_alist
);
643 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
645 deactivate_process (proc
);
648 /* Setup coding systems of PROCESS. */
651 setup_process_coding_systems (process
)
654 struct Lisp_Process
*p
= XPROCESS (process
);
655 int inch
= XINT (p
->infd
);
656 int outch
= XINT (p
->outfd
);
657 Lisp_Object coding_system
;
659 if (inch
< 0 || outch
< 0)
662 if (!proc_decode_coding_system
[inch
])
663 proc_decode_coding_system
[inch
]
664 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
665 coding_system
= p
->decode_coding_system
;
666 if (! NILP (p
->filter
))
668 if (NILP (p
->filter_multibyte
))
669 coding_system
= raw_text_coding_system (coding_system
);
671 else if (BUFFERP (p
->buffer
))
673 if (NILP (XBUFFER (p
->buffer
)->enable_multibyte_characters
))
674 coding_system
= raw_text_coding_system (coding_system
);
676 setup_coding_system (coding_system
, proc_decode_coding_system
[inch
]);
678 if (!proc_encode_coding_system
[outch
])
679 proc_encode_coding_system
[outch
]
680 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
681 setup_coding_system (p
->encode_coding_system
,
682 proc_encode_coding_system
[outch
]);
685 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
686 doc
: /* Return t if OBJECT is a process. */)
690 return PROCESSP (object
) ? Qt
: Qnil
;
693 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
694 doc
: /* Return the process named NAME, or nil if there is none. */)
696 register Lisp_Object name
;
701 return Fcdr (Fassoc (name
, Vprocess_alist
));
704 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
705 doc
: /* Return the (or a) process associated with BUFFER.
706 BUFFER may be a buffer or the name of one. */)
708 register Lisp_Object buffer
;
710 register Lisp_Object buf
, tail
, proc
;
712 if (NILP (buffer
)) return Qnil
;
713 buf
= Fget_buffer (buffer
);
714 if (NILP (buf
)) return Qnil
;
716 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
718 proc
= Fcdr (Fcar (tail
));
719 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
725 /* This is how commands for the user decode process arguments. It
726 accepts a process, a process name, a buffer, a buffer name, or nil.
727 Buffers denote the first process in the buffer, and nil denotes the
732 register Lisp_Object name
;
734 register Lisp_Object proc
, obj
;
737 obj
= Fget_process (name
);
739 obj
= Fget_buffer (name
);
741 error ("Process %s does not exist", SDATA (name
));
743 else if (NILP (name
))
744 obj
= Fcurrent_buffer ();
748 /* Now obj should be either a buffer object or a process object.
752 proc
= Fget_buffer_process (obj
);
754 error ("Buffer %s has no process", SDATA (XBUFFER (obj
)->name
));
764 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
765 doc
: /* Delete PROCESS: kill it and forget about it immediately.
766 PROCESS may be a process, a buffer, the name of a process or buffer, or
767 nil, indicating the current buffer's process. */)
769 register Lisp_Object process
;
771 process
= get_process (process
);
772 XPROCESS (process
)->raw_status_low
= Qnil
;
773 XPROCESS (process
)->raw_status_high
= Qnil
;
774 if (NETCONN_P (process
))
776 XPROCESS (process
)->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
777 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
780 else if (XINT (XPROCESS (process
)->infd
) >= 0)
782 Fkill_process (process
, Qnil
);
783 /* Do this now, since remove_process will make sigchld_handler do nothing. */
784 XPROCESS (process
)->status
785 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
786 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
789 remove_process (process
);
793 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
794 doc
: /* Return the status of PROCESS.
795 The returned value is one of the following symbols:
796 run -- for a process that is running.
797 stop -- for a process stopped but continuable.
798 exit -- for a process that has exited.
799 signal -- for a process that has got a fatal signal.
800 open -- for a network stream connection that is open.
801 listen -- for a network stream server that is listening.
802 closed -- for a network stream connection that is closed.
803 connect -- when waiting for a non-blocking connection to complete.
804 failed -- when a non-blocking connection has failed.
805 nil -- if arg is a process name and no such process exists.
806 PROCESS may be a process, a buffer, the name of a process, or
807 nil, indicating the current buffer's process. */)
809 register Lisp_Object process
;
811 register struct Lisp_Process
*p
;
812 register Lisp_Object status
;
814 if (STRINGP (process
))
815 process
= Fget_process (process
);
817 process
= get_process (process
);
822 p
= XPROCESS (process
);
823 if (!NILP (p
->raw_status_low
))
827 status
= XCAR (status
);
830 if (EQ (status
, Qexit
))
832 else if (EQ (p
->command
, Qt
))
834 else if (EQ (status
, Qrun
))
840 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
842 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
843 If PROCESS has not yet exited or died, return 0. */)
845 register Lisp_Object process
;
847 CHECK_PROCESS (process
);
848 if (!NILP (XPROCESS (process
)->raw_status_low
))
849 update_status (XPROCESS (process
));
850 if (CONSP (XPROCESS (process
)->status
))
851 return XCAR (XCDR (XPROCESS (process
)->status
));
852 return make_number (0);
855 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
856 doc
: /* Return the process id of PROCESS.
857 This is the pid of the external process which PROCESS uses or talks to.
858 For a network connection, this value is nil. */)
860 register Lisp_Object process
;
862 CHECK_PROCESS (process
);
863 return XPROCESS (process
)->pid
;
866 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
867 doc
: /* Return the name of PROCESS, as a string.
868 This is the name of the program invoked in PROCESS,
869 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 non-child channel, this is nil. */)
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. */)
894 register Lisp_Object process
;
896 CHECK_PROCESS (process
);
897 return XPROCESS (process
)->tty_name
;
900 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
902 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil). */)
904 register Lisp_Object process
, buffer
;
906 struct Lisp_Process
*p
;
908 CHECK_PROCESS (process
);
910 CHECK_BUFFER (buffer
);
911 p
= XPROCESS (process
);
914 p
->childp
= Fplist_put (p
->childp
, QCbuffer
, buffer
);
915 setup_process_coding_systems (process
);
919 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
921 doc
: /* Return the buffer PROCESS is associated with.
922 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
924 register Lisp_Object process
;
926 CHECK_PROCESS (process
);
927 return XPROCESS (process
)->buffer
;
930 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
932 doc
: /* Return the marker for the end of the last output from PROCESS. */)
934 register Lisp_Object process
;
936 CHECK_PROCESS (process
);
937 return XPROCESS (process
)->mark
;
940 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
942 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
943 t means stop accepting output from the process.
945 When a process has a filter, its buffer is not used for output.
946 Instead, each time it does output, the entire string of output is
947 passed to the filter.
949 The filter gets two arguments: the process and the string of output.
950 The string argument is normally a multibyte string, except:
951 - if the process' input coding system is no-conversion or raw-text,
952 it is a unibyte string (the non-converted input), or else
953 - if `default-enable-multibyte-characters' is nil, it is a unibyte
954 string (the result of converting the decoded input multibyte
955 string to unibyte with `string-make-unibyte'). */)
957 register Lisp_Object process
, filter
;
959 struct Lisp_Process
*p
;
961 CHECK_PROCESS (process
);
962 p
= XPROCESS (process
);
964 /* Don't signal an error if the process' input file descriptor
965 is closed. This could make debugging Lisp more difficult,
966 for example when doing something like
968 (setq process (start-process ...))
970 (set-process-filter process ...) */
972 if (XINT (p
->infd
) >= 0)
974 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
976 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
977 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
979 else if (EQ (p
->filter
, Qt
)
980 && !EQ (p
->command
, Qt
)) /* Network process not stopped. */
982 FD_SET (XINT (p
->infd
), &input_wait_mask
);
983 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
989 p
->childp
= Fplist_put (p
->childp
, QCfilter
, filter
);
990 setup_process_coding_systems (process
);
994 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
996 doc
: /* Returns the filter function of PROCESS; nil if none.
997 See `set-process-filter' for more info on filter functions. */)
999 register Lisp_Object process
;
1001 CHECK_PROCESS (process
);
1002 return XPROCESS (process
)->filter
;
1005 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
1007 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
1008 The sentinel is called as a function when the process changes state.
1009 It gets two arguments: the process, and a string describing the change. */)
1011 register Lisp_Object process
, sentinel
;
1013 struct Lisp_Process
*p
;
1015 CHECK_PROCESS (process
);
1016 p
= XPROCESS (process
);
1018 p
->sentinel
= sentinel
;
1020 p
->childp
= Fplist_put (p
->childp
, QCsentinel
, sentinel
);
1024 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1026 doc
: /* Return the sentinel of PROCESS; nil if none.
1027 See `set-process-sentinel' for more info on sentinels. */)
1029 register Lisp_Object process
;
1031 CHECK_PROCESS (process
);
1032 return XPROCESS (process
)->sentinel
;
1035 DEFUN ("set-process-window-size", Fset_process_window_size
,
1036 Sset_process_window_size
, 3, 3, 0,
1037 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1038 (process
, height
, width
)
1039 register Lisp_Object process
, height
, width
;
1041 CHECK_PROCESS (process
);
1042 CHECK_NATNUM (height
);
1043 CHECK_NATNUM (width
);
1045 if (XINT (XPROCESS (process
)->infd
) < 0
1046 || set_window_size (XINT (XPROCESS (process
)->infd
),
1047 XINT (height
), XINT (width
)) <= 0)
1053 DEFUN ("set-process-inherit-coding-system-flag",
1054 Fset_process_inherit_coding_system_flag
,
1055 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1056 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1057 If the second argument FLAG is non-nil, then the variable
1058 `buffer-file-coding-system' of the buffer associated with PROCESS
1059 will be bound to the value of the coding system used to decode
1062 This is useful when the coding system specified for the process buffer
1063 leaves either the character code conversion or the end-of-line conversion
1064 unspecified, or if the coding system used to decode the process output
1065 is more appropriate for saving the process buffer.
1067 Binding the variable `inherit-process-coding-system' to non-nil before
1068 starting the process is an alternative way of setting the inherit flag
1069 for the process which will run. */)
1071 register Lisp_Object process
, flag
;
1073 CHECK_PROCESS (process
);
1074 XPROCESS (process
)->inherit_coding_system_flag
= flag
;
1078 DEFUN ("process-inherit-coding-system-flag",
1079 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
1081 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
1082 If this flag is t, `buffer-file-coding-system' of the buffer
1083 associated with PROCESS will inherit the coding system used to decode
1084 the process output. */)
1086 register Lisp_Object process
;
1088 CHECK_PROCESS (process
);
1089 return XPROCESS (process
)->inherit_coding_system_flag
;
1092 DEFUN ("set-process-query-on-exit-flag",
1093 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1095 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1096 If the second argument FLAG is non-nil, Emacs will query the user before
1097 exiting if PROCESS is running. */)
1099 register Lisp_Object process
, flag
;
1101 CHECK_PROCESS (process
);
1102 XPROCESS (process
)->kill_without_query
= Fnull (flag
);
1106 DEFUN ("process-query-on-exit-flag",
1107 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1109 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1111 register Lisp_Object process
;
1113 CHECK_PROCESS (process
);
1114 return Fnull (XPROCESS (process
)->kill_without_query
);
1117 #ifdef DATAGRAM_SOCKETS
1118 Lisp_Object
Fprocess_datagram_address ();
1121 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1123 doc
: /* Return the contact info of PROCESS; t for a real child.
1124 For a net connection, the value depends on the optional KEY arg.
1125 If KEY is nil, value is a cons cell of the form (HOST SERVICE),
1126 if KEY is t, the complete contact information for the connection is
1127 returned, else the specific value for the keyword KEY is returned.
1128 See `make-network-process' for a list of keywords. */)
1130 register Lisp_Object process
, key
;
1132 Lisp_Object contact
;
1134 CHECK_PROCESS (process
);
1135 contact
= XPROCESS (process
)->childp
;
1137 #ifdef DATAGRAM_SOCKETS
1138 if (DATAGRAM_CONN_P (process
)
1139 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1140 contact
= Fplist_put (contact
, QCremote
,
1141 Fprocess_datagram_address (process
));
1144 if (!NETCONN_P (process
) || EQ (key
, Qt
))
1147 return Fcons (Fplist_get (contact
, QChost
),
1148 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1149 return Fplist_get (contact
, key
);
1152 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1154 doc
: /* Return the plist of PROCESS. */)
1156 register Lisp_Object process
;
1158 CHECK_PROCESS (process
);
1159 return XPROCESS (process
)->plist
;
1162 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1164 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1166 register Lisp_Object process
, plist
;
1168 CHECK_PROCESS (process
);
1171 XPROCESS (process
)->plist
= plist
;
1175 #if 0 /* Turned off because we don't currently record this info
1176 in the process. Perhaps add it. */
1177 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1178 doc
: /* Return the connection type of PROCESS.
1179 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1180 a socket connection. */)
1182 Lisp_Object process
;
1184 return XPROCESS (process
)->type
;
1189 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1191 doc
: /* Convert network ADDRESS from internal format to a string.
1192 If optional second argument OMIT-PORT is non-nil, don't include a port
1193 number in the string; in this case, interpret a 4 element vector as an
1194 IP address. Returns nil if format of ADDRESS is invalid. */)
1195 (address
, omit_port
)
1196 Lisp_Object address
, omit_port
;
1201 if (STRINGP (address
)) /* AF_LOCAL */
1204 if (VECTORP (address
)) /* AF_INET */
1206 register struct Lisp_Vector
*p
= XVECTOR (address
);
1207 Lisp_Object args
[6];
1210 if (!NILP (omit_port
) && (p
->size
== 4 || p
->size
== 5))
1212 args
[0] = build_string ("%d.%d.%d.%d");
1215 else if (p
->size
== 5)
1217 args
[0] = build_string ("%d.%d.%d.%d:%d");
1223 for (i
= 0; i
< nargs
; i
++)
1224 args
[i
+1] = p
->contents
[i
];
1225 return Fformat (nargs
+1, args
);
1228 if (CONSP (address
))
1230 Lisp_Object args
[2];
1231 args
[0] = build_string ("<Family %d>");
1232 args
[1] = Fcar (address
);
1233 return Fformat (2, args
);
1242 list_processes_1 (query_only
)
1243 Lisp_Object query_only
;
1245 register Lisp_Object tail
, tem
;
1246 Lisp_Object proc
, minspace
, tem1
;
1247 register struct Lisp_Process
*p
;
1249 int w_proc
, w_buffer
, w_tty
;
1250 Lisp_Object i_status
, i_buffer
, i_tty
, i_command
;
1252 w_proc
= 4; /* Proc */
1253 w_buffer
= 6; /* Buffer */
1254 w_tty
= 0; /* Omit if no ttys */
1256 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
1260 proc
= Fcdr (Fcar (tail
));
1261 p
= XPROCESS (proc
);
1262 if (NILP (p
->childp
))
1264 if (!NILP (query_only
) && !NILP (p
->kill_without_query
))
1266 if (STRINGP (p
->name
)
1267 && ( i
= SCHARS (p
->name
), (i
> w_proc
)))
1269 if (!NILP (p
->buffer
))
1271 if (NILP (XBUFFER (p
->buffer
)->name
) && w_buffer
< 8)
1272 w_buffer
= 8; /* (Killed) */
1273 else if ((i
= SCHARS (XBUFFER (p
->buffer
)->name
), (i
> w_buffer
)))
1276 if (STRINGP (p
->tty_name
)
1277 && (i
= SCHARS (p
->tty_name
), (i
> w_tty
)))
1281 XSETFASTINT (i_status
, w_proc
+ 1);
1282 XSETFASTINT (i_buffer
, XFASTINT (i_status
) + 9);
1285 XSETFASTINT (i_tty
, XFASTINT (i_buffer
) + w_buffer
+ 1);
1286 XSETFASTINT (i_command
, XFASTINT (i_buffer
) + w_tty
+ 1);
1289 XSETFASTINT (i_command
, XFASTINT (i_buffer
) + w_buffer
+ 1);
1292 XSETFASTINT (minspace
, 1);
1294 set_buffer_internal (XBUFFER (Vstandard_output
));
1295 current_buffer
->undo_list
= Qt
;
1297 current_buffer
->truncate_lines
= Qt
;
1299 write_string ("Proc", -1);
1300 Findent_to (i_status
, minspace
); write_string ("Status", -1);
1301 Findent_to (i_buffer
, minspace
); write_string ("Buffer", -1);
1304 Findent_to (i_tty
, minspace
); write_string ("Tty", -1);
1306 Findent_to (i_command
, minspace
); write_string ("Command", -1);
1307 write_string ("\n", -1);
1309 write_string ("----", -1);
1310 Findent_to (i_status
, minspace
); write_string ("------", -1);
1311 Findent_to (i_buffer
, minspace
); write_string ("------", -1);
1314 Findent_to (i_tty
, minspace
); write_string ("---", -1);
1316 Findent_to (i_command
, minspace
); write_string ("-------", -1);
1317 write_string ("\n", -1);
1319 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
1323 proc
= Fcdr (Fcar (tail
));
1324 p
= XPROCESS (proc
);
1325 if (NILP (p
->childp
))
1327 if (!NILP (query_only
) && !NILP (p
->kill_without_query
))
1330 Finsert (1, &p
->name
);
1331 Findent_to (i_status
, minspace
);
1333 if (!NILP (p
->raw_status_low
))
1336 if (CONSP (p
->status
))
1337 symbol
= XCAR (p
->status
);
1340 if (EQ (symbol
, Qsignal
))
1343 tem
= Fcar (Fcdr (p
->status
));
1345 if (XINT (tem
) < NSIG
)
1346 write_string (sys_errlist
[XINT (tem
)], -1);
1349 Fprinc (symbol
, Qnil
);
1351 else if (NETCONN1_P (p
))
1353 if (EQ (symbol
, Qexit
))
1354 write_string ("closed", -1);
1355 else if (EQ (p
->command
, Qt
))
1356 write_string ("stopped", -1);
1357 else if (EQ (symbol
, Qrun
))
1358 write_string ("open", -1);
1360 Fprinc (symbol
, Qnil
);
1363 Fprinc (symbol
, Qnil
);
1365 if (EQ (symbol
, Qexit
))
1368 tem
= Fcar (Fcdr (p
->status
));
1371 sprintf (tembuf
, " %d", (int) XFASTINT (tem
));
1372 write_string (tembuf
, -1);
1376 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
1377 remove_process (proc
);
1379 Findent_to (i_buffer
, minspace
);
1380 if (NILP (p
->buffer
))
1381 insert_string ("(none)");
1382 else if (NILP (XBUFFER (p
->buffer
)->name
))
1383 insert_string ("(Killed)");
1385 Finsert (1, &XBUFFER (p
->buffer
)->name
);
1389 Findent_to (i_tty
, minspace
);
1390 if (STRINGP (p
->tty_name
))
1391 Finsert (1, &p
->tty_name
);
1394 Findent_to (i_command
, minspace
);
1396 if (EQ (p
->status
, Qlisten
))
1398 Lisp_Object port
= Fplist_get (p
->childp
, QCservice
);
1399 if (INTEGERP (port
))
1400 port
= Fnumber_to_string (port
);
1402 port
= Fformat_network_address (Fplist_get (p
->childp
, QClocal
), Qnil
);
1403 sprintf (tembuf
, "(network %s server on %s)\n",
1404 (DATAGRAM_CHAN_P (XINT (p
->infd
)) ? "datagram" : "stream"),
1405 (STRINGP (port
) ? (char *)SDATA (port
) : "?"));
1406 insert_string (tembuf
);
1408 else if (NETCONN1_P (p
))
1410 /* For a local socket, there is no host name,
1411 so display service instead. */
1412 Lisp_Object host
= Fplist_get (p
->childp
, QChost
);
1413 if (!STRINGP (host
))
1415 host
= Fplist_get (p
->childp
, QCservice
);
1416 if (INTEGERP (host
))
1417 host
= Fnumber_to_string (host
);
1420 host
= Fformat_network_address (Fplist_get (p
->childp
, QCremote
), Qnil
);
1421 sprintf (tembuf
, "(network %s connection to %s)\n",
1422 (DATAGRAM_CHAN_P (XINT (p
->infd
)) ? "datagram" : "stream"),
1423 (STRINGP (host
) ? (char *)SDATA (host
) : "?"));
1424 insert_string (tembuf
);
1436 insert_string (" ");
1438 insert_string ("\n");
1444 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 1, "P",
1445 doc
: /* Display a list of all processes.
1446 If optional argument QUERY-ONLY is non-nil, only processes with
1447 the query-on-exit flag set will be listed.
1448 Any process listed as exited or signaled is actually eliminated
1449 after the listing is made. */)
1451 Lisp_Object query_only
;
1453 internal_with_output_to_temp_buffer ("*Process List*",
1454 list_processes_1
, query_only
);
1458 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1459 doc
: /* Return a list of all processes. */)
1462 return Fmapcar (Qcdr
, Vprocess_alist
);
1465 /* Starting asynchronous inferior processes. */
1467 static Lisp_Object
start_process_unwind ();
1469 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1470 doc
: /* Start a program in a subprocess. Return the process object for it.
1471 NAME is name for process. It is modified if necessary to make it unique.
1472 BUFFER is the buffer (or buffer name) to associate with the process.
1473 Process output goes at end of that buffer, unless you specify
1474 an output stream or filter function to handle the output.
1475 BUFFER may be also nil, meaning that this process is not associated
1477 PROGRAM is the program file name. It is searched for in PATH.
1478 Remaining arguments are strings to give program as arguments.
1480 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1483 register Lisp_Object
*args
;
1485 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1487 register unsigned char *new_argv
;
1490 register unsigned char **new_argv
;
1493 int count
= SPECPDL_INDEX ();
1497 buffer
= Fget_buffer_create (buffer
);
1499 /* Make sure that the child will be able to chdir to the current
1500 buffer's current directory, or its unhandled equivalent. We
1501 can't just have the child check for an error when it does the
1502 chdir, since it's in a vfork.
1504 We have to GCPRO around this because Fexpand_file_name and
1505 Funhandled_file_name_directory might call a file name handling
1506 function. The argument list is protected by the caller, so all
1507 we really have to worry about is buffer. */
1509 struct gcpro gcpro1
, gcpro2
;
1511 current_dir
= current_buffer
->directory
;
1513 GCPRO2 (buffer
, current_dir
);
1516 = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir
),
1518 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1519 report_file_error ("Setting current directory",
1520 Fcons (current_buffer
->directory
, Qnil
));
1526 CHECK_STRING (name
);
1530 CHECK_STRING (program
);
1532 proc
= make_process (name
);
1533 /* If an error occurs and we can't start the process, we want to
1534 remove it from the process list. This means that each error
1535 check in create_process doesn't need to call remove_process
1536 itself; it's all taken care of here. */
1537 record_unwind_protect (start_process_unwind
, proc
);
1539 XPROCESS (proc
)->childp
= Qt
;
1540 XPROCESS (proc
)->plist
= Qnil
;
1541 XPROCESS (proc
)->command_channel_p
= Qnil
;
1542 XPROCESS (proc
)->buffer
= buffer
;
1543 XPROCESS (proc
)->sentinel
= Qnil
;
1544 XPROCESS (proc
)->filter
= Qnil
;
1545 XPROCESS (proc
)->filter_multibyte
1546 = buffer_defaults
.enable_multibyte_characters
;
1547 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1549 #ifdef ADAPTIVE_READ_BUFFERING
1550 XPROCESS (proc
)->adaptive_read_buffering
= Vprocess_adaptive_read_buffering
;
1553 /* Make the process marker point into the process buffer (if any). */
1555 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1556 BUF_ZV (XBUFFER (buffer
)),
1557 BUF_ZV_BYTE (XBUFFER (buffer
)));
1560 /* Decide coding systems for communicating with the process. Here
1561 we don't setup the structure coding_system nor pay attention to
1562 unibyte mode. They are done in create_process. */
1564 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1565 Lisp_Object coding_systems
= Qt
;
1566 Lisp_Object val
, *args2
;
1567 struct gcpro gcpro1
, gcpro2
;
1569 val
= Vcoding_system_for_read
;
1572 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1573 args2
[0] = Qstart_process
;
1574 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1575 GCPRO2 (proc
, current_dir
);
1576 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1578 if (CONSP (coding_systems
))
1579 val
= XCAR (coding_systems
);
1580 else if (CONSP (Vdefault_process_coding_system
))
1581 val
= XCAR (Vdefault_process_coding_system
);
1583 XPROCESS (proc
)->decode_coding_system
= val
;
1585 val
= Vcoding_system_for_write
;
1588 if (EQ (coding_systems
, Qt
))
1590 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof args2
);
1591 args2
[0] = Qstart_process
;
1592 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1593 GCPRO2 (proc
, current_dir
);
1594 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1597 if (CONSP (coding_systems
))
1598 val
= XCDR (coding_systems
);
1599 else if (CONSP (Vdefault_process_coding_system
))
1600 val
= XCDR (Vdefault_process_coding_system
);
1602 XPROCESS (proc
)->encode_coding_system
= val
;
1606 /* Make a one member argv with all args concatenated
1607 together separated by a blank. */
1608 len
= SBYTES (program
) + 2;
1609 for (i
= 3; i
< nargs
; i
++)
1613 len
+= SBYTES (tem
) + 1; /* count the blank */
1615 new_argv
= (unsigned char *) alloca (len
);
1616 strcpy (new_argv
, SDATA (program
));
1617 for (i
= 3; i
< nargs
; i
++)
1621 strcat (new_argv
, " ");
1622 strcat (new_argv
, SDATA (tem
));
1624 /* Need to add code here to check for program existence on VMS */
1627 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1629 /* If program file name is not absolute, search our path for it.
1630 Put the name we will really use in TEM. */
1631 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1632 && !(SCHARS (program
) > 1
1633 && IS_DEVICE_SEP (SREF (program
, 1))))
1635 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1638 GCPRO4 (name
, program
, buffer
, current_dir
);
1639 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1642 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1643 tem
= Fexpand_file_name (tem
, Qnil
);
1647 if (!NILP (Ffile_directory_p (program
)))
1648 error ("Specified program for new process is a directory");
1652 /* If program file name starts with /: for quoting a magic name,
1654 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1655 && SREF (tem
, 1) == ':')
1656 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1658 /* Encode the file name and put it in NEW_ARGV.
1659 That's where the child will use it to execute the program. */
1660 tem
= ENCODE_FILE (tem
);
1661 new_argv
[0] = SDATA (tem
);
1663 /* Here we encode arguments by the coding system used for sending
1664 data to the process. We don't support using different coding
1665 systems for encoding arguments and for encoding data sent to the
1668 for (i
= 3; i
< nargs
; i
++)
1672 if (STRING_MULTIBYTE (tem
))
1673 tem
= (code_convert_string_norecord
1674 (tem
, XPROCESS (proc
)->encode_coding_system
, 1));
1675 new_argv
[i
- 2] = SDATA (tem
);
1677 new_argv
[i
- 2] = 0;
1678 #endif /* not VMS */
1680 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
1681 XPROCESS (proc
)->decoding_carryover
= make_number (0);
1682 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
1683 XPROCESS (proc
)->encoding_carryover
= make_number (0);
1685 XPROCESS (proc
)->inherit_coding_system_flag
1686 = (NILP (buffer
) || !inherit_process_coding_system
1689 create_process (proc
, (char **) new_argv
, current_dir
);
1691 return unbind_to (count
, proc
);
1694 /* This function is the unwind_protect form for Fstart_process. If
1695 PROC doesn't have its pid set, then we know someone has signaled
1696 an error and the process wasn't started successfully, so we should
1697 remove it from the process list. */
1699 start_process_unwind (proc
)
1702 if (!PROCESSP (proc
))
1705 /* Was PROC started successfully? */
1706 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1707 remove_process (proc
);
1713 create_process_1 (timer
)
1714 struct atimer
*timer
;
1716 /* Nothing to do. */
1720 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1723 /* Mimic blocking of signals on system V, which doesn't really have it. */
1725 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1726 int sigchld_deferred
;
1729 create_process_sigchld ()
1731 signal (SIGCHLD
, create_process_sigchld
);
1733 sigchld_deferred
= 1;
1739 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1741 create_process (process
, new_argv
, current_dir
)
1742 Lisp_Object process
;
1744 Lisp_Object current_dir
;
1746 int pid
, inchannel
, outchannel
;
1748 #ifdef POSIX_SIGNALS
1751 struct sigaction sigint_action
;
1752 struct sigaction sigquit_action
;
1754 struct sigaction sighup_action
;
1756 #else /* !POSIX_SIGNALS */
1759 SIGTYPE (*sigchld
)();
1762 #endif /* !POSIX_SIGNALS */
1763 /* Use volatile to protect variables from being clobbered by longjmp. */
1764 volatile int forkin
, forkout
;
1765 volatile int pty_flag
= 0;
1767 extern char **environ
;
1770 inchannel
= outchannel
= -1;
1773 if (!NILP (Vprocess_connection_type
))
1774 outchannel
= inchannel
= allocate_pty ();
1778 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1779 /* On most USG systems it does not work to open the pty's tty here,
1780 then close it and reopen it in the child. */
1782 /* Don't let this terminal become our controlling terminal
1783 (in case we don't have one). */
1784 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1786 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1789 report_file_error ("Opening pty", Qnil
);
1791 forkin
= forkout
= -1;
1792 #endif /* not USG, or USG_SUBTTY_WORKS */
1796 #endif /* HAVE_PTYS */
1799 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1800 report_file_error ("Opening socketpair", Qnil
);
1801 outchannel
= inchannel
= sv
[0];
1802 forkout
= forkin
= sv
[1];
1804 #else /* not SKTPAIR */
1809 report_file_error ("Creating pipe", Qnil
);
1815 emacs_close (inchannel
);
1816 emacs_close (forkout
);
1817 report_file_error ("Creating pipe", Qnil
);
1822 #endif /* not SKTPAIR */
1825 /* Replaced by close_process_descs */
1826 set_exclusive_use (inchannel
);
1827 set_exclusive_use (outchannel
);
1830 /* Stride people say it's a mystery why this is needed
1831 as well as the O_NDELAY, but that it fails without this. */
1832 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1835 ioctl (inchannel
, FIONBIO
, &one
);
1840 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1841 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1844 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1845 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1849 /* Record this as an active process, with its channels.
1850 As a result, child_setup will close Emacs's side of the pipes. */
1851 chan_process
[inchannel
] = process
;
1852 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1853 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1855 /* Previously we recorded the tty descriptor used in the subprocess.
1856 It was only used for getting the foreground tty process, so now
1857 we just reopen the device (see emacs_get_tty_pgrp) as this is
1858 more portable (see USG_SUBTTY_WORKS above). */
1860 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1861 XPROCESS (process
)->status
= Qrun
;
1862 setup_process_coding_systems (process
);
1864 /* Delay interrupts until we have a chance to store
1865 the new fork's pid in its process structure */
1866 #ifdef POSIX_SIGNALS
1867 sigemptyset (&blocked
);
1869 sigaddset (&blocked
, SIGCHLD
);
1871 #ifdef HAVE_WORKING_VFORK
1872 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1873 this sets the parent's signal handlers as well as the child's.
1874 So delay all interrupts whose handlers the child might munge,
1875 and record the current handlers so they can be restored later. */
1876 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1877 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1879 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1881 #endif /* HAVE_WORKING_VFORK */
1882 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1883 #else /* !POSIX_SIGNALS */
1887 #else /* not BSD4_1 */
1888 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1889 sigsetmask (sigmask (SIGCHLD
));
1890 #else /* ordinary USG */
1892 sigchld_deferred
= 0;
1893 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1895 #endif /* ordinary USG */
1896 #endif /* not BSD4_1 */
1897 #endif /* SIGCHLD */
1898 #endif /* !POSIX_SIGNALS */
1900 FD_SET (inchannel
, &input_wait_mask
);
1901 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1902 if (inchannel
> max_process_desc
)
1903 max_process_desc
= inchannel
;
1905 /* Until we store the proper pid, enable sigchld_handler
1906 to recognize an unknown pid as standing for this process.
1907 It is very important not to let this `marker' value stay
1908 in the table after this function has returned; if it does
1909 it might cause call-process to hang and subsequent asynchronous
1910 processes to get their return values scrambled. */
1911 XSETINT (XPROCESS (process
)->pid
, -1);
1916 /* child_setup must clobber environ on systems with true vfork.
1917 Protect it from permanent change. */
1918 char **save_environ
= environ
;
1920 current_dir
= ENCODE_FILE (current_dir
);
1925 #endif /* not WINDOWSNT */
1927 int xforkin
= forkin
;
1928 int xforkout
= forkout
;
1930 #if 0 /* This was probably a mistake--it duplicates code later on,
1931 but fails to handle all the cases. */
1932 /* Make sure SIGCHLD is not blocked in the child. */
1933 sigsetmask (SIGEMPTYMASK
);
1936 /* Make the pty be the controlling terminal of the process. */
1938 /* First, disconnect its current controlling terminal. */
1940 /* We tried doing setsid only if pty_flag, but it caused
1941 process_set_signal to fail on SGI when using a pipe. */
1943 /* Make the pty's terminal the controlling terminal. */
1947 /* We ignore the return value
1948 because faith@cs.unc.edu says that is necessary on Linux. */
1949 ioctl (xforkin
, TIOCSCTTY
, 0);
1952 #else /* not HAVE_SETSID */
1954 /* It's very important to call setpgrp here and no time
1955 afterwards. Otherwise, we lose our controlling tty which
1956 is set when we open the pty. */
1959 #endif /* not HAVE_SETSID */
1960 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1961 if (pty_flag
&& xforkin
>= 0)
1964 tcgetattr (xforkin
, &t
);
1966 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1967 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1970 #if defined (NTTYDISC) && defined (TIOCSETD)
1971 if (pty_flag
&& xforkin
>= 0)
1973 /* Use new line discipline. */
1974 int ldisc
= NTTYDISC
;
1975 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1980 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1981 can do TIOCSPGRP only to the process's controlling tty. */
1984 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1985 I can't test it since I don't have 4.3. */
1986 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1987 ioctl (j
, TIOCNOTTY
, 0);
1990 /* In order to get a controlling terminal on some versions
1991 of BSD, it is necessary to put the process in pgrp 0
1992 before it opens the terminal. */
2000 #endif /* TIOCNOTTY */
2002 #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY)
2003 /*** There is a suggestion that this ought to be a
2004 conditional on TIOCSPGRP,
2005 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
2006 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
2007 that system does seem to need this code, even though
2008 both HAVE_SETSID and TIOCSCTTY are defined. */
2009 /* Now close the pty (if we had it open) and reopen it.
2010 This makes the pty the controlling terminal of the subprocess. */
2013 #ifdef SET_CHILD_PTY_PGRP
2014 int pgrp
= getpid ();
2017 /* I wonder if emacs_close (emacs_open (pty_name, ...))
2020 emacs_close (xforkin
);
2021 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
2025 emacs_write (1, "Couldn't open the pty terminal ", 31);
2026 emacs_write (1, pty_name
, strlen (pty_name
));
2027 emacs_write (1, "\n", 1);
2031 #ifdef SET_CHILD_PTY_PGRP
2032 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
2033 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
2036 #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */
2038 #ifdef SETUP_SLAVE_PTY
2043 #endif /* SETUP_SLAVE_PTY */
2045 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
2046 Now reenable it in the child, so it will die when we want it to. */
2048 signal (SIGHUP
, SIG_DFL
);
2050 #endif /* HAVE_PTYS */
2052 signal (SIGINT
, SIG_DFL
);
2053 signal (SIGQUIT
, SIG_DFL
);
2055 /* Stop blocking signals in the child. */
2056 #ifdef POSIX_SIGNALS
2057 sigprocmask (SIG_SETMASK
, &procmask
, 0);
2058 #else /* !POSIX_SIGNALS */
2062 #else /* not BSD4_1 */
2063 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
2064 sigsetmask (SIGEMPTYMASK
);
2065 #else /* ordinary USG */
2067 signal (SIGCHLD
, sigchld
);
2069 #endif /* ordinary USG */
2070 #endif /* not BSD4_1 */
2071 #endif /* SIGCHLD */
2072 #endif /* !POSIX_SIGNALS */
2075 child_setup_tty (xforkout
);
2077 pid
= child_setup (xforkin
, xforkout
, xforkout
,
2078 new_argv
, 1, current_dir
);
2079 #else /* not WINDOWSNT */
2080 child_setup (xforkin
, xforkout
, xforkout
,
2081 new_argv
, 1, current_dir
);
2082 #endif /* not WINDOWSNT */
2084 environ
= save_environ
;
2089 /* This runs in the Emacs process. */
2093 emacs_close (forkin
);
2094 if (forkin
!= forkout
&& forkout
>= 0)
2095 emacs_close (forkout
);
2099 /* vfork succeeded. */
2100 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
2103 register_child (pid
, inchannel
);
2104 #endif /* WINDOWSNT */
2106 /* If the subfork execv fails, and it exits,
2107 this close hangs. I don't know why.
2108 So have an interrupt jar it loose. */
2110 struct atimer
*timer
;
2114 EMACS_SET_SECS_USECS (offset
, 1, 0);
2115 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
2118 emacs_close (forkin
);
2120 cancel_atimer (timer
);
2124 if (forkin
!= forkout
&& forkout
>= 0)
2125 emacs_close (forkout
);
2129 XPROCESS (process
)->tty_name
= build_string (pty_name
);
2132 XPROCESS (process
)->tty_name
= Qnil
;
2135 /* Restore the signal state whether vfork succeeded or not.
2136 (We will signal an error, below, if it failed.) */
2137 #ifdef POSIX_SIGNALS
2138 #ifdef HAVE_WORKING_VFORK
2139 /* Restore the parent's signal handlers. */
2140 sigaction (SIGINT
, &sigint_action
, 0);
2141 sigaction (SIGQUIT
, &sigquit_action
, 0);
2143 sigaction (SIGHUP
, &sighup_action
, 0);
2145 #endif /* HAVE_WORKING_VFORK */
2146 /* Stop blocking signals in the parent. */
2147 sigprocmask (SIG_SETMASK
, &procmask
, 0);
2148 #else /* !POSIX_SIGNALS */
2152 #else /* not BSD4_1 */
2153 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
2154 sigsetmask (SIGEMPTYMASK
);
2155 #else /* ordinary USG */
2157 signal (SIGCHLD
, sigchld
);
2158 /* Now really handle any of these signals
2159 that came in during this function. */
2160 if (sigchld_deferred
)
2161 kill (getpid (), SIGCHLD
);
2163 #endif /* ordinary USG */
2164 #endif /* not BSD4_1 */
2165 #endif /* SIGCHLD */
2166 #endif /* !POSIX_SIGNALS */
2168 /* Now generate the error if vfork failed. */
2170 report_file_error ("Doing vfork", Qnil
);
2172 #endif /* not VMS */
2177 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2178 The address family of sa is not included in the result. */
2181 conv_sockaddr_to_lisp (sa
, len
)
2182 struct sockaddr
*sa
;
2185 Lisp_Object address
;
2188 register struct Lisp_Vector
*p
;
2190 switch (sa
->sa_family
)
2194 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2195 len
= sizeof (sin
->sin_addr
) + 1;
2196 address
= Fmake_vector (make_number (len
), Qnil
);
2197 p
= XVECTOR (address
);
2198 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2199 cp
= (unsigned char *)&sin
->sin_addr
;
2202 #ifdef HAVE_LOCAL_SOCKETS
2205 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2206 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2207 if (sockun
->sun_path
[i
] == 0)
2209 return make_unibyte_string (sockun
->sun_path
, i
);
2213 len
-= sizeof (sa
->sa_family
);
2214 address
= Fcons (make_number (sa
->sa_family
),
2215 Fmake_vector (make_number (len
), Qnil
));
2216 p
= XVECTOR (XCDR (address
));
2217 cp
= (unsigned char *) sa
+ sizeof (sa
->sa_family
);
2223 p
->contents
[i
++] = make_number (*cp
++);
2229 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2232 get_lisp_to_sockaddr_size (address
, familyp
)
2233 Lisp_Object address
;
2236 register struct Lisp_Vector
*p
;
2238 if (VECTORP (address
))
2240 p
= XVECTOR (address
);
2244 return sizeof (struct sockaddr_in
);
2247 #ifdef HAVE_LOCAL_SOCKETS
2248 else if (STRINGP (address
))
2250 *familyp
= AF_LOCAL
;
2251 return sizeof (struct sockaddr_un
);
2254 else if (CONSP (address
) && INTEGERP (XCAR (address
)) && VECTORP (XCDR (address
)))
2256 struct sockaddr
*sa
;
2257 *familyp
= XINT (XCAR (address
));
2258 p
= XVECTOR (XCDR (address
));
2259 return p
->size
+ sizeof (sa
->sa_family
);
2264 /* Convert an address object (vector or string) to an internal sockaddr.
2265 Format of address has already been validated by size_lisp_to_sockaddr. */
2268 conv_lisp_to_sockaddr (family
, address
, sa
, len
)
2270 Lisp_Object address
;
2271 struct sockaddr
*sa
;
2274 register struct Lisp_Vector
*p
;
2275 register unsigned char *cp
= NULL
;
2279 sa
->sa_family
= family
;
2281 if (VECTORP (address
))
2283 p
= XVECTOR (address
);
2284 if (family
== AF_INET
)
2286 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2287 len
= sizeof (sin
->sin_addr
) + 1;
2288 i
= XINT (p
->contents
[--len
]);
2289 sin
->sin_port
= htons (i
);
2290 cp
= (unsigned char *)&sin
->sin_addr
;
2293 else if (STRINGP (address
))
2295 #ifdef HAVE_LOCAL_SOCKETS
2296 if (family
== AF_LOCAL
)
2298 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2299 cp
= SDATA (address
);
2300 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2301 sockun
->sun_path
[i
] = *cp
++;
2308 p
= XVECTOR (XCDR (address
));
2309 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2312 for (i
= 0; i
< len
; i
++)
2313 if (INTEGERP (p
->contents
[i
]))
2314 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2317 #ifdef DATAGRAM_SOCKETS
2318 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2320 doc
: /* Get the current datagram address associated with PROCESS. */)
2322 Lisp_Object process
;
2326 CHECK_PROCESS (process
);
2328 if (!DATAGRAM_CONN_P (process
))
2331 channel
= XINT (XPROCESS (process
)->infd
);
2332 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2333 datagram_address
[channel
].len
);
2336 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2338 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2339 Returns nil upon error setting address, ADDRESS otherwise. */)
2341 Lisp_Object process
, address
;
2346 CHECK_PROCESS (process
);
2348 if (!DATAGRAM_CONN_P (process
))
2351 channel
= XINT (XPROCESS (process
)->infd
);
2353 len
= get_lisp_to_sockaddr_size (address
, &family
);
2354 if (datagram_address
[channel
].len
!= len
)
2356 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2362 static struct socket_options
{
2363 /* The name of this option. Should be lowercase version of option
2364 name without SO_ prefix. */
2366 /* Option level SOL_... */
2368 /* Option number SO_... */
2370 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2371 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2372 } socket_options
[] =
2374 #ifdef SO_BINDTODEVICE
2375 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2378 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2381 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2384 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2387 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2390 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2393 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2396 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2398 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2401 /* Set option OPT to value VAL on socket S.
2403 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2404 Signals an error if setting a known option fails.
2408 set_socket_option (s
, opt
, val
)
2410 Lisp_Object opt
, val
;
2413 struct socket_options
*sopt
;
2418 name
= (char *) SDATA (SYMBOL_NAME (opt
));
2419 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2420 if (strcmp (name
, sopt
->name
) == 0)
2423 switch (sopt
->opttype
)
2428 optval
= NILP (val
) ? 0 : 1;
2429 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2430 &optval
, sizeof (optval
));
2438 optval
= XINT (val
);
2440 error ("Bad option value for %s", name
);
2441 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2442 &optval
, sizeof (optval
));
2446 #ifdef SO_BINDTODEVICE
2449 char devname
[IFNAMSIZ
+1];
2451 /* This is broken, at least in the Linux 2.4 kernel.
2452 To unbind, the arg must be a zero integer, not the empty string.
2453 This should work on all systems. KFS. 2003-09-23. */
2454 bzero (devname
, sizeof devname
);
2457 char *arg
= (char *) SDATA (val
);
2458 int len
= min (strlen (arg
), IFNAMSIZ
);
2459 bcopy (arg
, devname
, len
);
2461 else if (!NILP (val
))
2462 error ("Bad option value for %s", name
);
2463 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2472 struct linger linger
;
2475 linger
.l_linger
= 0;
2477 linger
.l_linger
= XINT (val
);
2479 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2480 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2481 &linger
, sizeof (linger
));
2491 report_file_error ("Cannot set network option",
2492 Fcons (opt
, Fcons (val
, Qnil
)));
2493 return (1 << sopt
->optbit
);
2497 DEFUN ("set-network-process-option",
2498 Fset_network_process_option
, Sset_network_process_option
,
2500 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2501 See `make-network-process' for a list of options and values.
2502 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2503 OPTION is not a supported option, return nil instead; otherwise return t. */)
2504 (process
, option
, value
, no_error
)
2505 Lisp_Object process
, option
, value
;
2506 Lisp_Object no_error
;
2509 struct Lisp_Process
*p
;
2511 CHECK_PROCESS (process
);
2512 p
= XPROCESS (process
);
2513 if (!NETCONN1_P (p
))
2514 error ("Process is not a network process");
2518 error ("Process is not running");
2520 if (set_socket_option (s
, option
, value
))
2522 p
->childp
= Fplist_put (p
->childp
, option
, value
);
2526 if (NILP (no_error
))
2527 error ("Unknown or unsupported option");
2533 /* A version of request_sigio suitable for a record_unwind_protect. */
2536 unwind_request_sigio (dummy
)
2539 if (interrupt_input
)
2544 /* Create a network stream/datagram client/server process. Treated
2545 exactly like a normal process when reading and writing. Primary
2546 differences are in status display and process deletion. A network
2547 connection has no PID; you cannot signal it. All you can do is
2548 stop/continue it and deactivate/close it via delete-process */
2550 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2552 doc
: /* Create and return a network server or client process.
2554 In Emacs, network connections are represented by process objects, so
2555 input and output work as for subprocesses and `delete-process' closes
2556 a network connection. However, a network process has no process id,
2557 it cannot be signalled, and the status codes are different from normal
2560 Arguments are specified as keyword/argument pairs. The following
2561 arguments are defined:
2563 :name NAME -- NAME is name for process. It is modified if necessary
2566 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2567 with the process. Process output goes at end of that buffer, unless
2568 you specify an output stream or filter function to handle the output.
2569 BUFFER may be also nil, meaning that this process is not associated
2572 :host HOST -- HOST is name of the host to connect to, or its IP
2573 address. The symbol `local' specifies the local host. If specified
2574 for a server process, it must be a valid name or address for the local
2575 host, and only clients connecting to that address will be accepted.
2577 :service SERVICE -- SERVICE is name of the service desired, or an
2578 integer specifying a port number to connect to. If SERVICE is t,
2579 a random port number is selected for the server.
2581 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2582 stream type connection, `datagram' creates a datagram type connection.
2584 :family FAMILY -- FAMILY is the address (and protocol) family for the
2585 service specified by HOST and SERVICE. The default address family is
2586 Inet (or IPv4) for the host and port number specified by HOST and
2587 SERVICE. Other address families supported are:
2588 local -- for a local (i.e. UNIX) address specified by SERVICE.
2590 :local ADDRESS -- ADDRESS is the local address used for the connection.
2591 This parameter is ignored when opening a client process. When specified
2592 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2594 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2595 connection. This parameter is ignored when opening a stream server
2596 process. For a datagram server process, it specifies the initial
2597 setting of the remote datagram address. When specified for a client
2598 process, the FAMILY, HOST, and SERVICE args are ignored.
2600 The format of ADDRESS depends on the address family:
2601 - An IPv4 address is represented as an vector of integers [A B C D P]
2602 corresponding to numeric IP address A.B.C.D and port number P.
2603 - A local address is represented as a string with the address in the
2604 local address space.
2605 - An "unsupported family" address is represented by a cons (F . AV)
2606 where F is the family number and AV is a vector containing the socket
2607 address data with one element per address data byte. Do not rely on
2608 this format in portable code, as it may depend on implementation
2609 defined constants, data sizes, and data structure alignment.
2611 :coding CODING -- If CODING is a symbol, it specifies the coding
2612 system used for both reading and writing for this process. If CODING
2613 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2614 ENCODING is used for writing.
2616 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2617 return without waiting for the connection to complete; instead, the
2618 sentinel function will be called with second arg matching "open" (if
2619 successful) or "failed" when the connect completes. Default is to use
2620 a blocking connect (i.e. wait) for stream type connections.
2622 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2623 running when Emacs is exited.
2625 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2626 In the stopped state, a server process does not accept new
2627 connections, and a client process does not handle incoming traffic.
2628 The stopped state is cleared by `continue-process' and set by
2631 :filter FILTER -- Install FILTER as the process filter.
2633 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2634 process filter are multibyte, otherwise they are unibyte.
2635 If this keyword is not specified, the strings are multibyte iff
2636 `default-enable-multibyte-characters' is non-nil.
2638 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2640 :log LOG -- Install LOG as the server process log function. This
2641 function is called when the server accepts a network connection from a
2642 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2643 is the server process, CLIENT is the new process for the connection,
2644 and MESSAGE is a string.
2646 :plist PLIST -- Install PLIST as the new process' initial plist.
2648 :server QLEN -- if QLEN is non-nil, create a server process for the
2649 specified FAMILY, SERVICE, and connection type (stream or datagram).
2650 If QLEN is an integer, it is used as the max. length of the server's
2651 pending connection queue (also known as the backlog); the default
2652 queue length is 5. Default is to create a client process.
2654 The following network options can be specified for this connection:
2656 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2657 :dontroute BOOL -- Only send to directly connected hosts.
2658 :keepalive BOOL -- Send keep-alive messages on network stream.
2659 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2660 :oobinline BOOL -- Place out-of-band data in receive data stream.
2661 :priority INT -- Set protocol defined priority for sent packets.
2662 :reuseaddr BOOL -- Allow reusing a recently used local address
2663 (this is allowed by default for a server process).
2664 :bindtodevice NAME -- bind to interface NAME. Using this may require
2665 special privileges on some systems.
2667 Consult the relevant system programmer's manual pages for more
2668 information on using these options.
2671 A server process will listen for and accept connections from clients.
2672 When a client connection is accepted, a new network process is created
2673 for the connection with the following parameters:
2675 - The client's process name is constructed by concatenating the server
2676 process' NAME and a client identification string.
2677 - If the FILTER argument is non-nil, the client process will not get a
2678 separate process buffer; otherwise, the client's process buffer is a newly
2679 created buffer named after the server process' BUFFER name or process
2680 NAME concatenated with the client identification string.
2681 - The connection type and the process filter and sentinel parameters are
2682 inherited from the server process' TYPE, FILTER and SENTINEL.
2683 - The client process' contact info is set according to the client's
2684 addressing information (typically an IP address and a port number).
2685 - The client process' plist is initialized from the server's plist.
2687 Notice that the FILTER and SENTINEL args are never used directly by
2688 the server process. Also, the BUFFER argument is not used directly by
2689 the server process, but via the optional :log function, accepted (and
2690 failed) connections may be logged in the server process' buffer.
2692 The original argument list, modified with the actual connection
2693 information, is available via the `process-contact' function.
2695 usage: (make-network-process &rest ARGS) */)
2701 Lisp_Object contact
;
2702 struct Lisp_Process
*p
;
2703 #ifdef HAVE_GETADDRINFO
2704 struct addrinfo ai
, *res
, *lres
;
2705 struct addrinfo hints
;
2706 char *portstring
, portbuf
[128];
2707 #else /* HAVE_GETADDRINFO */
2708 struct _emacs_addrinfo
2714 struct sockaddr
*ai_addr
;
2715 struct _emacs_addrinfo
*ai_next
;
2717 #endif /* HAVE_GETADDRINFO */
2718 struct sockaddr_in address_in
;
2719 #ifdef HAVE_LOCAL_SOCKETS
2720 struct sockaddr_un address_un
;
2725 int s
= -1, outch
, inch
;
2726 struct gcpro gcpro1
;
2727 int count
= SPECPDL_INDEX ();
2729 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2731 Lisp_Object name
, buffer
, host
, service
, address
;
2732 Lisp_Object filter
, sentinel
;
2733 int is_non_blocking_client
= 0;
2734 int is_server
= 0, backlog
= 5;
2741 /* Save arguments for process-contact and clone-process. */
2742 contact
= Flist (nargs
, args
);
2746 /* Ensure socket support is loaded if available. */
2747 init_winsock (TRUE
);
2750 /* :type TYPE (nil: stream, datagram */
2751 tem
= Fplist_get (contact
, QCtype
);
2753 socktype
= SOCK_STREAM
;
2754 #ifdef DATAGRAM_SOCKETS
2755 else if (EQ (tem
, Qdatagram
))
2756 socktype
= SOCK_DGRAM
;
2759 error ("Unsupported connection type");
2762 tem
= Fplist_get (contact
, QCserver
);
2765 /* Don't support network sockets when non-blocking mode is
2766 not available, since a blocked Emacs is not useful. */
2767 #if defined(TERM) || (!defined(O_NONBLOCK) && !defined(O_NDELAY))
2768 error ("Network servers not supported");
2772 backlog
= XINT (tem
);
2776 /* Make QCaddress an alias for :local (server) or :remote (client). */
2777 QCaddress
= is_server
? QClocal
: QCremote
;
2780 if (!is_server
&& socktype
== SOCK_STREAM
2781 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2783 #ifndef NON_BLOCKING_CONNECT
2784 error ("Non-blocking connect not supported");
2786 is_non_blocking_client
= 1;
2790 name
= Fplist_get (contact
, QCname
);
2791 buffer
= Fplist_get (contact
, QCbuffer
);
2792 filter
= Fplist_get (contact
, QCfilter
);
2793 sentinel
= Fplist_get (contact
, QCsentinel
);
2795 CHECK_STRING (name
);
2798 /* Let's handle TERM before things get complicated ... */
2799 host
= Fplist_get (contact
, QChost
);
2800 CHECK_STRING (host
);
2802 service
= Fplist_get (contact
, QCservice
);
2803 if (INTEGERP (service
))
2804 port
= htons ((unsigned short) XINT (service
));
2807 struct servent
*svc_info
;
2808 CHECK_STRING (service
);
2809 svc_info
= getservbyname (SDATA (service
), "tcp");
2811 error ("Unknown service: %s", SDATA (service
));
2812 port
= svc_info
->s_port
;
2815 s
= connect_server (0);
2817 report_file_error ("error creating socket", Fcons (name
, Qnil
));
2818 send_command (s
, C_PORT
, 0, "%s:%d", SDATA (host
), ntohs (port
));
2819 send_command (s
, C_DUMB
, 1, 0);
2821 #else /* not TERM */
2823 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2824 ai
.ai_socktype
= socktype
;
2829 /* :local ADDRESS or :remote ADDRESS */
2830 address
= Fplist_get (contact
, QCaddress
);
2831 if (!NILP (address
))
2833 host
= service
= Qnil
;
2835 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
2836 error ("Malformed :address");
2837 ai
.ai_family
= family
;
2838 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
2839 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
2843 /* :family FAMILY -- nil (for Inet), local, or integer. */
2844 tem
= Fplist_get (contact
, QCfamily
);
2846 family
= XINT (tem
);
2851 #ifdef HAVE_LOCAL_SOCKETS
2852 else if (EQ (tem
, Qlocal
))
2857 error ("Unknown address family");
2858 ai
.ai_family
= family
;
2860 /* :service SERVICE -- string, integer (port number), or t (random port). */
2861 service
= Fplist_get (contact
, QCservice
);
2863 #ifdef HAVE_LOCAL_SOCKETS
2864 if (family
== AF_LOCAL
)
2866 /* Host is not used. */
2868 CHECK_STRING (service
);
2869 bzero (&address_un
, sizeof address_un
);
2870 address_un
.sun_family
= AF_LOCAL
;
2871 strncpy (address_un
.sun_path
, SDATA (service
), sizeof address_un
.sun_path
);
2872 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
2873 ai
.ai_addrlen
= sizeof address_un
;
2878 /* :host HOST -- hostname, ip address, or 'local for localhost. */
2879 host
= Fplist_get (contact
, QChost
);
2882 if (EQ (host
, Qlocal
))
2883 host
= build_string ("localhost");
2884 CHECK_STRING (host
);
2887 /* Slow down polling to every ten seconds.
2888 Some kernels have a bug which causes retrying connect to fail
2889 after a connect. Polling can interfere with gethostbyname too. */
2890 #ifdef POLL_FOR_INPUT
2891 if (socktype
== SOCK_STREAM
)
2893 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
2894 bind_polling_period (10);
2898 #ifdef HAVE_GETADDRINFO
2899 /* If we have a host, use getaddrinfo to resolve both host and service.
2900 Otherwise, use getservbyname to lookup the service. */
2904 /* SERVICE can either be a string or int.
2905 Convert to a C string for later use by getaddrinfo. */
2906 if (EQ (service
, Qt
))
2908 else if (INTEGERP (service
))
2910 sprintf (portbuf
, "%ld", (long) XINT (service
));
2911 portstring
= portbuf
;
2915 CHECK_STRING (service
);
2916 portstring
= SDATA (service
);
2921 memset (&hints
, 0, sizeof (hints
));
2923 hints
.ai_family
= NILP (Fplist_member (contact
, QCfamily
)) ? AF_UNSPEC
: family
;
2924 hints
.ai_socktype
= socktype
;
2925 hints
.ai_protocol
= 0;
2926 ret
= getaddrinfo (SDATA (host
), portstring
, &hints
, &res
);
2928 #ifdef HAVE_GAI_STRERROR
2929 error ("%s/%s %s", SDATA (host
), portstring
, gai_strerror(ret
));
2931 error ("%s/%s getaddrinfo error %d", SDATA (host
), portstring
, ret
);
2937 #endif /* HAVE_GETADDRINFO */
2939 /* We end up here if getaddrinfo is not defined, or in case no hostname
2940 has been specified (e.g. for a local server process). */
2942 if (EQ (service
, Qt
))
2944 else if (INTEGERP (service
))
2945 port
= htons ((unsigned short) XINT (service
));
2948 struct servent
*svc_info
;
2949 CHECK_STRING (service
);
2950 svc_info
= getservbyname (SDATA (service
),
2951 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
2953 error ("Unknown service: %s", SDATA (service
));
2954 port
= svc_info
->s_port
;
2957 bzero (&address_in
, sizeof address_in
);
2958 address_in
.sin_family
= family
;
2959 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
2960 address_in
.sin_port
= port
;
2962 #ifndef HAVE_GETADDRINFO
2965 struct hostent
*host_info_ptr
;
2967 /* gethostbyname may fail with TRY_AGAIN, but we don't honour that,
2968 as it may `hang' Emacs for a very long time. */
2971 host_info_ptr
= gethostbyname (SDATA (host
));
2976 bcopy (host_info_ptr
->h_addr
, (char *) &address_in
.sin_addr
,
2977 host_info_ptr
->h_length
);
2978 family
= host_info_ptr
->h_addrtype
;
2979 address_in
.sin_family
= family
;
2982 /* Attempt to interpret host as numeric inet address */
2984 IN_ADDR numeric_addr
;
2985 numeric_addr
= inet_addr ((char *) SDATA (host
));
2986 if (NUMERIC_ADDR_ERROR
)
2987 error ("Unknown host \"%s\"", SDATA (host
));
2989 bcopy ((char *)&numeric_addr
, (char *) &address_in
.sin_addr
,
2990 sizeof (address_in
.sin_addr
));
2994 #endif /* not HAVE_GETADDRINFO */
2996 ai
.ai_family
= family
;
2997 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
2998 ai
.ai_addrlen
= sizeof address_in
;
3002 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
3003 when connect is interrupted. So let's not let it get interrupted.
3004 Note we do not turn off polling, because polling is only used
3005 when not interrupt_input, and thus not normally used on the systems
3006 which have this bug. On systems which use polling, there's no way
3007 to quit if polling is turned off. */
3009 && !is_server
&& socktype
== SOCK_STREAM
)
3011 /* Comment from KFS: The original open-network-stream code
3012 didn't unwind protect this, but it seems like the proper
3013 thing to do. In any case, I don't see how it could harm to
3014 do this -- and it makes cleanup (using unbind_to) easier. */
3015 record_unwind_protect (unwind_request_sigio
, Qnil
);
3019 /* Do this in case we never enter the for-loop below. */
3020 count1
= SPECPDL_INDEX ();
3023 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3029 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3036 #ifdef DATAGRAM_SOCKETS
3037 if (!is_server
&& socktype
== SOCK_DGRAM
)
3039 #endif /* DATAGRAM_SOCKETS */
3041 #ifdef NON_BLOCKING_CONNECT
3042 if (is_non_blocking_client
)
3045 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3047 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3059 /* Make us close S if quit. */
3060 record_unwind_protect (close_file_unwind
, make_number (s
));
3062 /* Parse network options in the arg list.
3063 We simply ignore anything which isn't a known option (including other keywords).
3064 An error is signalled if setting a known option fails. */
3065 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3066 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3070 /* Configure as a server socket. */
3072 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3073 explicit :reuseaddr key to override this. */
3074 #ifdef HAVE_LOCAL_SOCKETS
3075 if (family
!= AF_LOCAL
)
3077 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3080 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3081 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3084 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3085 report_file_error ("Cannot bind server socket", Qnil
);
3087 #ifdef HAVE_GETSOCKNAME
3088 if (EQ (service
, Qt
))
3090 struct sockaddr_in sa1
;
3091 int len1
= sizeof (sa1
);
3092 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3094 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3095 service
= make_number (ntohs (sa1
.sin_port
));
3096 contact
= Fplist_put (contact
, QCservice
, service
);
3101 if (socktype
== SOCK_STREAM
&& listen (s
, backlog
))
3102 report_file_error ("Cannot listen on server socket", Qnil
);
3110 /* This turns off all alarm-based interrupts; the
3111 bind_polling_period call above doesn't always turn all the
3112 short-interval ones off, especially if interrupt_input is
3115 It'd be nice to be able to control the connect timeout
3116 though. Would non-blocking connect calls be portable?
3118 This used to be conditioned by HAVE_GETADDRINFO. Why? */
3120 turn_on_atimers (0);
3122 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3125 turn_on_atimers (1);
3127 if (ret
== 0 || xerrno
== EISCONN
)
3129 /* The unwind-protect will be discarded afterwards.
3130 Likewise for immediate_quit. */
3134 #ifdef NON_BLOCKING_CONNECT
3136 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3140 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3148 /* Discard the unwind protect closing S. */
3149 specpdl_ptr
= specpdl
+ count1
;
3153 if (xerrno
== EINTR
)
3159 #ifdef DATAGRAM_SOCKETS
3160 if (socktype
== SOCK_DGRAM
)
3162 if (datagram_address
[s
].sa
)
3164 datagram_address
[s
].sa
= (struct sockaddr
*) xmalloc (lres
->ai_addrlen
);
3165 datagram_address
[s
].len
= lres
->ai_addrlen
;
3169 bzero (datagram_address
[s
].sa
, lres
->ai_addrlen
);
3170 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3173 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3174 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3175 conv_lisp_to_sockaddr (rfamily
, remote
,
3176 datagram_address
[s
].sa
, rlen
);
3180 bcopy (lres
->ai_addr
, datagram_address
[s
].sa
, lres
->ai_addrlen
);
3183 contact
= Fplist_put (contact
, QCaddress
,
3184 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3185 #ifdef HAVE_GETSOCKNAME
3188 struct sockaddr_in sa1
;
3189 int len1
= sizeof (sa1
);
3190 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3191 contact
= Fplist_put (contact
, QClocal
,
3192 conv_sockaddr_to_lisp (&sa1
, len1
));
3197 #ifdef HAVE_GETADDRINFO
3204 /* Discard the unwind protect for closing S, if any. */
3205 specpdl_ptr
= specpdl
+ count1
;
3207 /* Unwind bind_polling_period and request_sigio. */
3208 unbind_to (count
, Qnil
);
3212 /* If non-blocking got this far - and failed - assume non-blocking is
3213 not supported after all. This is probably a wrong assumption, but
3214 the normal blocking calls to open-network-stream handles this error
3216 if (is_non_blocking_client
)
3221 report_file_error ("make server process failed", contact
);
3223 report_file_error ("make client process failed", contact
);
3226 #endif /* not TERM */
3232 buffer
= Fget_buffer_create (buffer
);
3233 proc
= make_process (name
);
3235 chan_process
[inch
] = proc
;
3238 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3241 fcntl (inch
, F_SETFL
, O_NDELAY
);
3245 p
= XPROCESS (proc
);
3247 p
->childp
= contact
;
3248 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
3251 p
->sentinel
= sentinel
;
3253 p
->filter_multibyte
= buffer_defaults
.enable_multibyte_characters
;
3254 /* Override the above only if :filter-multibyte is specified. */
3255 if (! NILP (Fplist_member (contact
, QCfilter_multibyte
)))
3256 p
->filter_multibyte
= Fplist_get (contact
, QCfilter_multibyte
);
3257 p
->log
= Fplist_get (contact
, QClog
);
3258 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3259 p
->kill_without_query
= Qt
;
3260 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3263 XSETINT (p
->infd
, inch
);
3264 XSETINT (p
->outfd
, outch
);
3265 if (is_server
&& socktype
== SOCK_STREAM
)
3266 p
->status
= Qlisten
;
3268 #ifdef NON_BLOCKING_CONNECT
3269 if (is_non_blocking_client
)
3271 /* We may get here if connect did succeed immediately. However,
3272 in that case, we still need to signal this like a non-blocking
3274 p
->status
= Qconnect
;
3275 if (!FD_ISSET (inch
, &connect_wait_mask
))
3277 FD_SET (inch
, &connect_wait_mask
);
3278 num_pending_connects
++;
3283 /* A server may have a client filter setting of Qt, but it must
3284 still listen for incoming connects unless it is stopped. */
3285 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3286 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3288 FD_SET (inch
, &input_wait_mask
);
3289 FD_SET (inch
, &non_keyboard_wait_mask
);
3292 if (inch
> max_process_desc
)
3293 max_process_desc
= inch
;
3295 tem
= Fplist_member (contact
, QCcoding
);
3296 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3297 tem
= Qnil
; /* No error message (too late!). */
3300 /* Setup coding systems for communicating with the network stream. */
3301 struct gcpro gcpro1
;
3302 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3303 Lisp_Object coding_systems
= Qt
;
3304 Lisp_Object args
[5], val
;
3308 val
= XCAR (XCDR (tem
));
3312 else if (!NILP (Vcoding_system_for_read
))
3313 val
= Vcoding_system_for_read
;
3314 else if ((!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
))
3315 || (NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
)))
3316 /* We dare not decode end-of-line format by setting VAL to
3317 Qraw_text, because the existing Emacs Lisp libraries
3318 assume that they receive bare code including a sequene of
3323 if (NILP (host
) || NILP (service
))
3324 coding_systems
= Qnil
;
3327 args
[0] = Qopen_network_stream
, args
[1] = name
,
3328 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3330 coding_systems
= Ffind_operation_coding_system (5, args
);
3333 if (CONSP (coding_systems
))
3334 val
= XCAR (coding_systems
);
3335 else if (CONSP (Vdefault_process_coding_system
))
3336 val
= XCAR (Vdefault_process_coding_system
);
3340 p
->decode_coding_system
= val
;
3344 val
= XCAR (XCDR (tem
));
3348 else if (!NILP (Vcoding_system_for_write
))
3349 val
= Vcoding_system_for_write
;
3350 else if (NILP (current_buffer
->enable_multibyte_characters
))
3354 if (EQ (coding_systems
, Qt
))
3356 if (NILP (host
) || NILP (service
))
3357 coding_systems
= Qnil
;
3360 args
[0] = Qopen_network_stream
, args
[1] = name
,
3361 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3363 coding_systems
= Ffind_operation_coding_system (5, args
);
3367 if (CONSP (coding_systems
))
3368 val
= XCDR (coding_systems
);
3369 else if (CONSP (Vdefault_process_coding_system
))
3370 val
= XCDR (Vdefault_process_coding_system
);
3374 p
->encode_coding_system
= val
;
3376 setup_process_coding_systems (proc
);
3378 p
->decoding_buf
= make_uninit_string (0);
3379 p
->decoding_carryover
= make_number (0);
3380 p
->encoding_buf
= make_uninit_string (0);
3381 p
->encoding_carryover
= make_number (0);
3383 p
->inherit_coding_system_flag
3384 = (!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
3390 #endif /* HAVE_SOCKETS */
3393 #if defined(HAVE_SOCKETS) && defined(HAVE_NET_IF_H) && defined(HAVE_SYS_IOCTL_H)
3396 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3397 doc
: /* Return an alist of all network interfaces and their network address.
3398 Each element is a cons, the car of which is a string containing the
3399 interface name, and the cdr is the network address in internal
3400 format; see the description of ADDRESS in `make-network-process'. */)
3403 struct ifconf ifconf
;
3404 struct ifreq
*ifreqs
= NULL
;
3409 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3415 buf_size
= ifaces
* sizeof(ifreqs
[0]);
3416 ifreqs
= (struct ifreq
*)xrealloc(ifreqs
, buf_size
);
3423 ifconf
.ifc_len
= buf_size
;
3424 ifconf
.ifc_req
= ifreqs
;
3425 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3431 if (ifconf
.ifc_len
== buf_size
)
3435 ifaces
= ifconf
.ifc_len
/ sizeof (ifreqs
[0]);
3438 while (--ifaces
>= 0)
3440 struct ifreq
*ifq
= &ifreqs
[ifaces
];
3441 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3442 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3444 bcopy (ifq
->ifr_name
, namebuf
, sizeof (ifq
->ifr_name
));
3445 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3446 res
= Fcons (Fcons (build_string (namebuf
),
3447 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3448 sizeof (struct sockaddr
))),
3454 #endif /* SIOCGIFCONF */
3456 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
3463 static struct ifflag_def ifflag_table
[] = {
3467 #ifdef IFF_BROADCAST
3468 { IFF_BROADCAST
, "broadcast" },
3471 { IFF_DEBUG
, "debug" },
3474 { IFF_LOOPBACK
, "loopback" },
3476 #ifdef IFF_POINTOPOINT
3477 { IFF_POINTOPOINT
, "pointopoint" },
3480 { IFF_RUNNING
, "running" },
3483 { IFF_NOARP
, "noarp" },
3486 { IFF_PROMISC
, "promisc" },
3488 #ifdef IFF_NOTRAILERS
3489 { IFF_NOTRAILERS
, "notrailers" },
3492 { IFF_ALLMULTI
, "allmulti" },
3495 { IFF_MASTER
, "master" },
3498 { IFF_SLAVE
, "slave" },
3500 #ifdef IFF_MULTICAST
3501 { IFF_MULTICAST
, "multicast" },
3504 { IFF_PORTSEL
, "portsel" },
3506 #ifdef IFF_AUTOMEDIA
3507 { IFF_AUTOMEDIA
, "automedia" },
3510 { IFF_DYNAMIC
, "dynamic" },
3515 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3516 doc
: /* Return information about network interface named IFNAME.
3517 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3518 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3519 NETMASK is the layer 3 network mask, HWADDR is the layer 2 addres, and
3520 FLAGS is the current flags of the interface. */)
3525 Lisp_Object res
= Qnil
;
3530 CHECK_STRING (ifname
);
3532 bzero (rq
.ifr_name
, sizeof rq
.ifr_name
);
3533 strncpy (rq
.ifr_name
, SDATA (ifname
), sizeof (rq
.ifr_name
));
3535 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3540 #if defined(SIOCGIFFLAGS) && defined(HAVE_STRUCT_IFREQ_IFR_FLAGS)
3541 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3543 int flags
= rq
.ifr_flags
;
3544 struct ifflag_def
*fp
;
3548 for (fp
= ifflag_table
; flags
!= 0 && fp
; fp
++)
3550 if (flags
& fp
->flag_bit
)
3552 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3553 flags
-= fp
->flag_bit
;
3556 for (fnum
= 0; flags
&& fnum
< 32; fnum
++)
3558 if (flags
& (1 << fnum
))
3560 elt
= Fcons (make_number (fnum
), elt
);
3565 res
= Fcons (elt
, res
);
3568 #if defined(SIOCGIFHWADDR) && defined(HAVE_STRUCT_IFREQ_IFR_HWADDR)
3569 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3571 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3572 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3576 for (n
= 0; n
< 6; n
++)
3577 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3578 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3581 res
= Fcons (elt
, res
);
3584 #if defined(SIOCGIFNETMASK) && defined(ifr_netmask)
3585 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3588 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3591 res
= Fcons (elt
, res
);
3594 #if defined(SIOCGIFBRDADDR) && defined(HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3595 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3598 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3601 res
= Fcons (elt
, res
);
3604 #if defined(SIOCGIFADDR) && defined(HAVE_STRUCT_IFREQ_IFR_ADDR)
3605 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3608 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3611 res
= Fcons (elt
, res
);
3615 return any
? res
: Qnil
;
3618 #endif /* HAVE_SOCKETS */
3620 /* Turn off input and output for process PROC. */
3623 deactivate_process (proc
)
3626 register int inchannel
, outchannel
;
3627 register struct Lisp_Process
*p
= XPROCESS (proc
);
3629 inchannel
= XINT (p
->infd
);
3630 outchannel
= XINT (p
->outfd
);
3632 #ifdef ADAPTIVE_READ_BUFFERING
3633 if (XINT (p
->read_output_delay
) > 0)
3635 if (--process_output_delay_count
< 0)
3636 process_output_delay_count
= 0;
3637 XSETINT (p
->read_output_delay
, 0);
3638 p
->read_output_skip
= Qnil
;
3644 /* Beware SIGCHLD hereabouts. */
3645 flush_pending_output (inchannel
);
3648 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
3649 sys$
dassgn (outchannel
);
3650 vs
= get_vms_process_pointer (p
->pid
);
3652 give_back_vms_process_stuff (vs
);
3655 emacs_close (inchannel
);
3656 if (outchannel
>= 0 && outchannel
!= inchannel
)
3657 emacs_close (outchannel
);
3660 XSETINT (p
->infd
, -1);
3661 XSETINT (p
->outfd
, -1);
3662 #ifdef DATAGRAM_SOCKETS
3663 if (DATAGRAM_CHAN_P (inchannel
))
3665 xfree (datagram_address
[inchannel
].sa
);
3666 datagram_address
[inchannel
].sa
= 0;
3667 datagram_address
[inchannel
].len
= 0;
3670 chan_process
[inchannel
] = Qnil
;
3671 FD_CLR (inchannel
, &input_wait_mask
);
3672 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3673 #ifdef NON_BLOCKING_CONNECT
3674 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3676 FD_CLR (inchannel
, &connect_wait_mask
);
3677 if (--num_pending_connects
< 0)
3681 if (inchannel
== max_process_desc
)
3684 /* We just closed the highest-numbered process input descriptor,
3685 so recompute the highest-numbered one now. */
3686 max_process_desc
= 0;
3687 for (i
= 0; i
< MAXDESC
; i
++)
3688 if (!NILP (chan_process
[i
]))
3689 max_process_desc
= i
;
3694 /* Close all descriptors currently in use for communication
3695 with subprocess. This is used in a newly-forked subprocess
3696 to get rid of irrelevant descriptors. */
3699 close_process_descs ()
3703 for (i
= 0; i
< MAXDESC
; i
++)
3705 Lisp_Object process
;
3706 process
= chan_process
[i
];
3707 if (!NILP (process
))
3709 int in
= XINT (XPROCESS (process
)->infd
);
3710 int out
= XINT (XPROCESS (process
)->outfd
);
3713 if (out
>= 0 && in
!= out
)
3720 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3722 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3723 It is read into the process' buffers or given to their filter functions.
3724 Non-nil arg PROCESS means do not return until some output has been received
3726 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of
3727 seconds and microseconds to wait; return after that much time whether
3728 or not there is input.
3729 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
3730 from PROCESS, suspending reading output from other processes.
3731 If JUST-THIS-ONE is an integer, don't run any timers either.
3732 Return non-nil iff we received any output before the timeout expired. */)
3733 (process
, timeout
, timeout_msecs
, just_this_one
)
3734 register Lisp_Object process
, timeout
, timeout_msecs
, just_this_one
;
3739 if (! NILP (process
))
3740 CHECK_PROCESS (process
);
3742 just_this_one
= Qnil
;
3744 if (! NILP (timeout_msecs
))
3746 CHECK_NUMBER (timeout_msecs
);
3747 useconds
= XINT (timeout_msecs
);
3748 if (!INTEGERP (timeout
))
3749 XSETINT (timeout
, 0);
3752 int carry
= useconds
/ 1000000;
3754 XSETINT (timeout
, XINT (timeout
) + carry
);
3755 useconds
-= carry
* 1000000;
3757 /* I think this clause is necessary because C doesn't
3758 guarantee a particular rounding direction for negative
3762 XSETINT (timeout
, XINT (timeout
) - 1);
3763 useconds
+= 1000000;
3770 if (! NILP (timeout
))
3772 CHECK_NUMBER (timeout
);
3773 seconds
= XINT (timeout
);
3774 if (seconds
< 0 || (seconds
== 0 && useconds
== 0))
3778 seconds
= NILP (process
) ? -1 : 0;
3781 (wait_reading_process_output (seconds
, useconds
, 0, 0,
3783 !NILP (process
) ? XPROCESS (process
) : NULL
,
3784 NILP (just_this_one
) ? 0 :
3785 !INTEGERP (just_this_one
) ? 1 : -1)
3789 /* Accept a connection for server process SERVER on CHANNEL. */
3791 static int connect_counter
= 0;
3794 server_accept_connection (server
, channel
)
3798 Lisp_Object proc
, caller
, name
, buffer
;
3799 Lisp_Object contact
, host
, service
;
3800 struct Lisp_Process
*ps
= XPROCESS (server
);
3801 struct Lisp_Process
*p
;
3805 struct sockaddr_in in
;
3806 #ifdef HAVE_LOCAL_SOCKETS
3807 struct sockaddr_un un
;
3810 int len
= sizeof saddr
;
3812 s
= accept (channel
, &saddr
.sa
, &len
);
3821 if (code
== EWOULDBLOCK
)
3825 if (!NILP (ps
->log
))
3826 call3 (ps
->log
, server
, Qnil
,
3827 concat3 (build_string ("accept failed with code"),
3828 Fnumber_to_string (make_number (code
)),
3829 build_string ("\n")));
3835 /* Setup a new process to handle the connection. */
3837 /* Generate a unique identification of the caller, and build contact
3838 information for this process. */
3841 switch (saddr
.sa
.sa_family
)
3845 Lisp_Object args
[5];
3846 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
3847 args
[0] = build_string ("%d.%d.%d.%d");
3848 args
[1] = make_number (*ip
++);
3849 args
[2] = make_number (*ip
++);
3850 args
[3] = make_number (*ip
++);
3851 args
[4] = make_number (*ip
++);
3852 host
= Fformat (5, args
);
3853 service
= make_number (ntohs (saddr
.in
.sin_port
));
3855 args
[0] = build_string (" <%s:%d>");
3858 caller
= Fformat (3, args
);
3862 #ifdef HAVE_LOCAL_SOCKETS
3866 caller
= Fnumber_to_string (make_number (connect_counter
));
3867 caller
= concat3 (build_string (" <*"), caller
, build_string ("*>"));
3871 /* Create a new buffer name for this process if it doesn't have a
3872 filter. The new buffer name is based on the buffer name or
3873 process name of the server process concatenated with the caller
3876 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
3880 buffer
= ps
->buffer
;
3882 buffer
= Fbuffer_name (buffer
);
3887 buffer
= concat2 (buffer
, caller
);
3888 buffer
= Fget_buffer_create (buffer
);
3892 /* Generate a unique name for the new server process. Combine the
3893 server process name with the caller identification. */
3895 name
= concat2 (ps
->name
, caller
);
3896 proc
= make_process (name
);
3898 chan_process
[s
] = proc
;
3901 fcntl (s
, F_SETFL
, O_NONBLOCK
);
3904 fcntl (s
, F_SETFL
, O_NDELAY
);
3908 p
= XPROCESS (proc
);
3910 /* Build new contact information for this setup. */
3911 contact
= Fcopy_sequence (ps
->childp
);
3912 contact
= Fplist_put (contact
, QCserver
, Qnil
);
3913 contact
= Fplist_put (contact
, QChost
, host
);
3914 if (!NILP (service
))
3915 contact
= Fplist_put (contact
, QCservice
, service
);
3916 contact
= Fplist_put (contact
, QCremote
,
3917 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
3918 #ifdef HAVE_GETSOCKNAME
3920 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
3921 contact
= Fplist_put (contact
, QClocal
,
3922 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
3925 p
->childp
= contact
;
3926 p
->plist
= Fcopy_sequence (ps
->plist
);
3929 p
->sentinel
= ps
->sentinel
;
3930 p
->filter
= ps
->filter
;
3933 XSETINT (p
->infd
, s
);
3934 XSETINT (p
->outfd
, s
);
3937 /* Client processes for accepted connections are not stopped initially. */
3938 if (!EQ (p
->filter
, Qt
))
3940 FD_SET (s
, &input_wait_mask
);
3941 FD_SET (s
, &non_keyboard_wait_mask
);
3944 if (s
> max_process_desc
)
3945 max_process_desc
= s
;
3947 /* Setup coding system for new process based on server process.
3948 This seems to be the proper thing to do, as the coding system
3949 of the new process should reflect the settings at the time the
3950 server socket was opened; not the current settings. */
3952 p
->decode_coding_system
= ps
->decode_coding_system
;
3953 p
->encode_coding_system
= ps
->encode_coding_system
;
3954 setup_process_coding_systems (proc
);
3956 p
->decoding_buf
= make_uninit_string (0);
3957 p
->decoding_carryover
= make_number (0);
3958 p
->encoding_buf
= make_uninit_string (0);
3959 p
->encoding_carryover
= make_number (0);
3961 p
->inherit_coding_system_flag
3962 = (NILP (buffer
) ? Qnil
: ps
->inherit_coding_system_flag
);
3964 if (!NILP (ps
->log
))
3965 call3 (ps
->log
, server
, proc
,
3966 concat3 (build_string ("accept from "),
3967 (STRINGP (host
) ? host
: build_string ("-")),
3968 build_string ("\n")));
3970 if (!NILP (p
->sentinel
))
3971 exec_sentinel (proc
,
3972 concat3 (build_string ("open from "),
3973 (STRINGP (host
) ? host
: build_string ("-")),
3974 build_string ("\n")));
3977 /* This variable is different from waiting_for_input in keyboard.c.
3978 It is used to communicate to a lisp process-filter/sentinel (via the
3979 function Fwaiting_for_user_input_p below) whether Emacs was waiting
3980 for user-input when that process-filter was called.
3981 waiting_for_input cannot be used as that is by definition 0 when
3982 lisp code is being evalled.
3983 This is also used in record_asynch_buffer_change.
3984 For that purpose, this must be 0
3985 when not inside wait_reading_process_output. */
3986 static int waiting_for_user_input_p
;
3988 /* This is here so breakpoints can be put on it. */
3990 wait_reading_process_output_1 ()
3994 /* Read and dispose of subprocess output while waiting for timeout to
3995 elapse and/or keyboard input to be available.
3998 timeout in seconds, or
3999 zero for no limit, or
4000 -1 means gobble data immediately available but don't wait for any.
4003 an additional duration to wait, measured in microseconds.
4004 If this is nonzero and time_limit is 0, then the timeout
4005 consists of MICROSECS only.
4007 READ_KBD is a lisp value:
4008 0 to ignore keyboard input, or
4009 1 to return when input is available, or
4010 -1 meaning caller will actually read the input, so don't throw to
4011 the quit handler, or
4013 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4014 output that arrives.
4016 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4017 (and gobble terminal input into the buffer if any arrives).
4019 If WAIT_PROC is specified, wait until something arrives from that
4020 process. The return value is true iff we read some input from
4023 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4024 (suspending output from other processes). A negative value
4025 means don't run any timers either.
4027 If WAIT_PROC is specified, then the function returns true iff we
4028 received input from that process before the timeout elapsed.
4029 Otherwise, return true iff we received input from any process. */
4032 wait_reading_process_output (time_limit
, microsecs
, read_kbd
, do_display
,
4033 wait_for_cell
, wait_proc
, just_wait_proc
)
4034 int time_limit
, microsecs
, read_kbd
, do_display
;
4035 Lisp_Object wait_for_cell
;
4036 struct Lisp_Process
*wait_proc
;
4039 register int channel
, nfds
;
4040 SELECT_TYPE Available
;
4041 #ifdef NON_BLOCKING_CONNECT
4042 SELECT_TYPE Connecting
;
4045 int check_delay
, no_avail
;
4048 EMACS_TIME timeout
, end_time
;
4049 int wait_channel
= -1;
4050 int got_some_input
= 0;
4051 /* Either nil or a cons cell, the car of which is of interest and
4052 may be changed outside of this routine. */
4053 int saved_waiting_for_user_input_p
= waiting_for_user_input_p
;
4055 FD_ZERO (&Available
);
4056 #ifdef NON_BLOCKING_CONNECT
4057 FD_ZERO (&Connecting
);
4060 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4061 if (wait_proc
!= NULL
)
4062 wait_channel
= XINT (wait_proc
->infd
);
4064 waiting_for_user_input_p
= read_kbd
;
4066 /* Since we may need to wait several times,
4067 compute the absolute time to return at. */
4068 if (time_limit
|| microsecs
)
4070 EMACS_GET_TIME (end_time
);
4071 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4072 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4074 #ifdef POLL_INTERRUPTED_SYS_CALL
4075 /* AlainF 5-Jul-1996
4076 HP-UX 10.10 seem to have problems with signals coming in
4077 Causes "poll: interrupted system call" messages when Emacs is run
4079 Turn off periodic alarms (in case they are in use),
4080 and then turn off any other atimers. */
4082 turn_on_atimers (0);
4083 #endif /* POLL_INTERRUPTED_SYS_CALL */
4087 int timeout_reduced_for_timers
= 0;
4089 /* If calling from keyboard input, do not quit
4090 since we want to return C-g as an input character.
4091 Otherwise, do pending quit if requested. */
4095 else if (interrupt_input_pending
)
4096 handle_async_input ();
4099 /* Exit now if the cell we're waiting for became non-nil. */
4100 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4103 /* Compute time from now till when time limit is up */
4104 /* Exit if already run out */
4105 if (time_limit
== -1)
4107 /* -1 specified for timeout means
4108 gobble output available now
4109 but don't wait at all. */
4111 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4113 else if (time_limit
|| microsecs
)
4115 EMACS_GET_TIME (timeout
);
4116 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4117 if (EMACS_TIME_NEG_P (timeout
))
4122 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4125 /* Normally we run timers here.
4126 But not if wait_for_cell; in those cases,
4127 the wait is supposed to be short,
4128 and those callers cannot handle running arbitrary Lisp code here. */
4129 if (NILP (wait_for_cell
)
4130 && just_wait_proc
>= 0)
4132 EMACS_TIME timer_delay
;
4136 int old_timers_run
= timers_run
;
4137 struct buffer
*old_buffer
= current_buffer
;
4139 timer_delay
= timer_check (1);
4141 /* If a timer has run, this might have changed buffers
4142 an alike. Make read_key_sequence aware of that. */
4143 if (timers_run
!= old_timers_run
4144 && old_buffer
!= current_buffer
4145 && waiting_for_user_input_p
== -1)
4146 record_asynch_buffer_change ();
4148 if (timers_run
!= old_timers_run
&& do_display
)
4149 /* We must retry, since a timer may have requeued itself
4150 and that could alter the time_delay. */
4151 redisplay_preserve_echo_area (9);
4155 while (!detect_input_pending ());
4157 /* If there is unread keyboard input, also return. */
4159 && requeued_events_pending_p ())
4162 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4164 EMACS_TIME difference
;
4165 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4166 if (EMACS_TIME_NEG_P (difference
))
4168 timeout
= timer_delay
;
4169 timeout_reduced_for_timers
= 1;
4172 /* If time_limit is -1, we are not going to wait at all. */
4173 else if (time_limit
!= -1)
4175 /* This is so a breakpoint can be put here. */
4176 wait_reading_process_output_1 ();
4180 /* Cause C-g and alarm signals to take immediate action,
4181 and cause input available signals to zero out timeout.
4183 It is important that we do this before checking for process
4184 activity. If we get a SIGCHLD after the explicit checks for
4185 process activity, timeout is the only way we will know. */
4187 set_waiting_for_input (&timeout
);
4189 /* If status of something has changed, and no input is
4190 available, notify the user of the change right away. After
4191 this explicit check, we'll let the SIGCHLD handler zap
4192 timeout to get our attention. */
4193 if (update_tick
!= process_tick
&& do_display
)
4196 #ifdef NON_BLOCKING_CONNECT
4200 Atemp
= input_wait_mask
;
4202 /* On Mac OS X 10.0, the SELECT system call always says input is
4203 present (for reading) at stdin, even when none is. This
4204 causes the call to SELECT below to return 1 and
4205 status_notify not to be called. As a result output of
4206 subprocesses are incorrectly discarded.
4210 IF_NON_BLOCKING_CONNECT (Ctemp
= connect_wait_mask
);
4212 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4213 if ((select (max (max_process_desc
, max_keyboard_desc
) + 1,
4215 #ifdef NON_BLOCKING_CONNECT
4216 (num_pending_connects
> 0 ? &Ctemp
: (SELECT_TYPE
*)0),
4220 (SELECT_TYPE
*)0, &timeout
)
4223 /* It's okay for us to do this and then continue with
4224 the loop, since timeout has already been zeroed out. */
4225 clear_waiting_for_input ();
4230 /* Don't wait for output from a non-running process. Just
4231 read whatever data has already been received. */
4232 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
4233 update_status (wait_proc
);
4235 && ! EQ (wait_proc
->status
, Qrun
)
4236 && ! EQ (wait_proc
->status
, Qconnect
))
4238 int nread
, total_nread
= 0;
4240 clear_waiting_for_input ();
4241 XSETPROCESS (proc
, wait_proc
);
4243 /* Read data from the process, until we exhaust it. */
4244 while (XINT (wait_proc
->infd
) >= 0)
4246 nread
= read_process_output (proc
, XINT (wait_proc
->infd
));
4252 total_nread
+= nread
;
4254 else if (nread
== -1 && EIO
== errno
)
4258 else if (nread
== -1 && EAGAIN
== errno
)
4262 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4266 if (total_nread
> 0 && do_display
)
4267 redisplay_preserve_echo_area (10);
4272 /* Wait till there is something to do */
4274 if (wait_proc
&& just_wait_proc
)
4276 if (XINT (wait_proc
->infd
) < 0) /* Terminated */
4278 FD_SET (XINT (wait_proc
->infd
), &Available
);
4280 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4282 else if (!NILP (wait_for_cell
))
4284 Available
= non_process_wait_mask
;
4286 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4291 Available
= non_keyboard_wait_mask
;
4293 Available
= input_wait_mask
;
4294 IF_NON_BLOCKING_CONNECT (check_connect
= (num_pending_connects
> 0));
4295 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4298 /* If frame size has changed or the window is newly mapped,
4299 redisplay now, before we start to wait. There is a race
4300 condition here; if a SIGIO arrives between now and the select
4301 and indicates that a frame is trashed, the select may block
4302 displaying a trashed screen. */
4303 if (frame_garbaged
&& do_display
)
4305 clear_waiting_for_input ();
4306 redisplay_preserve_echo_area (11);
4308 set_waiting_for_input (&timeout
);
4312 if (read_kbd
&& detect_input_pending ())
4319 #ifdef NON_BLOCKING_CONNECT
4321 Connecting
= connect_wait_mask
;
4324 #ifdef ADAPTIVE_READ_BUFFERING
4325 if (process_output_skip
&& check_delay
> 0)
4327 int usecs
= EMACS_USECS (timeout
);
4328 if (EMACS_SECS (timeout
) > 0 || usecs
> READ_OUTPUT_DELAY_MAX
)
4329 usecs
= READ_OUTPUT_DELAY_MAX
;
4330 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4332 proc
= chan_process
[channel
];
4335 if (XINT (XPROCESS (proc
)->read_output_delay
) > 0)
4338 if (NILP (XPROCESS (proc
)->read_output_skip
))
4340 FD_CLR (channel
, &Available
);
4341 XPROCESS (proc
)->read_output_skip
= Qnil
;
4342 if (XINT (XPROCESS (proc
)->read_output_delay
) < usecs
)
4343 usecs
= XINT (XPROCESS (proc
)->read_output_delay
);
4346 EMACS_SET_SECS_USECS (timeout
, 0, usecs
);
4347 process_output_skip
= 0;
4351 nfds
= select (max (max_process_desc
, max_keyboard_desc
) + 1,
4353 #ifdef NON_BLOCKING_CONNECT
4354 (check_connect
? &Connecting
: (SELECT_TYPE
*)0),
4358 (SELECT_TYPE
*)0, &timeout
);
4363 /* Make C-g and alarm signals set flags again */
4364 clear_waiting_for_input ();
4366 /* If we woke up due to SIGWINCH, actually change size now. */
4367 do_pending_window_change (0);
4369 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4370 /* We wanted the full specified time, so return now. */
4374 if (xerrno
== EINTR
)
4377 /* Ultrix select seems to return ENOMEM when it is
4378 interrupted. Treat it just like EINTR. Bleah. Note
4379 that we want to test for the "ultrix" CPP symbol, not
4380 "__ultrix__"; the latter is only defined under GCC, but
4381 not by DEC's bundled CC. -JimB */
4382 else if (xerrno
== ENOMEM
)
4386 /* This happens for no known reason on ALLIANT.
4387 I am guessing that this is the right response. -- RMS. */
4388 else if (xerrno
== EFAULT
)
4391 else if (xerrno
== EBADF
)
4394 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4395 the child's closure of the pts gives the parent a SIGHUP, and
4396 the ptc file descriptor is automatically closed,
4397 yielding EBADF here or at select() call above.
4398 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4399 in m/ibmrt-aix.h), and here we just ignore the select error.
4400 Cleanup occurs c/o status_notify after SIGCLD. */
4401 no_avail
= 1; /* Cannot depend on values returned */
4407 error ("select error: %s", emacs_strerror (xerrno
));
4412 FD_ZERO (&Available
);
4413 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4416 #if defined(sun) && !defined(USG5_4)
4417 if (nfds
> 0 && keyboard_bit_set (&Available
)
4419 /* System sometimes fails to deliver SIGIO.
4421 David J. Mackenzie says that Emacs doesn't compile under
4422 Solaris if this code is enabled, thus the USG5_4 in the CPP
4423 conditional. "I haven't noticed any ill effects so far.
4424 If you find a Solaris expert somewhere, they might know
4426 kill (getpid (), SIGIO
);
4429 #if 0 /* When polling is used, interrupt_input is 0,
4430 so get_input_pending should read the input.
4431 So this should not be needed. */
4432 /* If we are using polling for input,
4433 and we see input available, make it get read now.
4434 Otherwise it might not actually get read for a second.
4435 And on hpux, since we turn off polling in wait_reading_process_output,
4436 it might never get read at all if we don't spend much time
4437 outside of wait_reading_process_output. */
4438 if (read_kbd
&& interrupt_input
4439 && keyboard_bit_set (&Available
)
4440 && input_polling_used ())
4441 kill (getpid (), SIGALRM
);
4444 /* Check for keyboard input */
4445 /* If there is any, return immediately
4446 to give it higher priority than subprocesses */
4450 int old_timers_run
= timers_run
;
4451 struct buffer
*old_buffer
= current_buffer
;
4454 if (detect_input_pending_run_timers (do_display
))
4456 swallow_events (do_display
);
4457 if (detect_input_pending_run_timers (do_display
))
4461 /* If a timer has run, this might have changed buffers
4462 an alike. Make read_key_sequence aware of that. */
4463 if (timers_run
!= old_timers_run
4464 && waiting_for_user_input_p
== -1
4465 && old_buffer
!= current_buffer
)
4466 record_asynch_buffer_change ();
4472 /* If there is unread keyboard input, also return. */
4474 && requeued_events_pending_p ())
4477 /* If we are not checking for keyboard input now,
4478 do process events (but don't run any timers).
4479 This is so that X events will be processed.
4480 Otherwise they may have to wait until polling takes place.
4481 That would causes delays in pasting selections, for example.
4483 (We used to do this only if wait_for_cell.) */
4484 if (read_kbd
== 0 && detect_input_pending ())
4486 swallow_events (do_display
);
4487 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4488 if (detect_input_pending ())
4493 /* Exit now if the cell we're waiting for became non-nil. */
4494 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4498 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4499 go read it. This can happen with X on BSD after logging out.
4500 In that case, there really is no input and no SIGIO,
4501 but select says there is input. */
4503 if (read_kbd
&& interrupt_input
4504 && keyboard_bit_set (&Available
) && ! noninteractive
)
4505 kill (getpid (), SIGIO
);
4509 got_some_input
|= nfds
> 0;
4511 /* If checking input just got us a size-change event from X,
4512 obey it now if we should. */
4513 if (read_kbd
|| ! NILP (wait_for_cell
))
4514 do_pending_window_change (0);
4516 /* Check for data from a process. */
4517 if (no_avail
|| nfds
== 0)
4520 /* Really FIRST_PROC_DESC should be 0 on Unix,
4521 but this is safer in the short run. */
4522 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4524 if (FD_ISSET (channel
, &Available
)
4525 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
4529 /* If waiting for this channel, arrange to return as
4530 soon as no more input to be processed. No more
4532 if (wait_channel
== channel
)
4538 proc
= chan_process
[channel
];
4542 /* If this is a server stream socket, accept connection. */
4543 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4545 server_accept_connection (proc
, channel
);
4549 /* Read data from the process, starting with our
4550 buffered-ahead character if we have one. */
4552 nread
= read_process_output (proc
, channel
);
4555 /* Since read_process_output can run a filter,
4556 which can call accept-process-output,
4557 don't try to read from any other processes
4558 before doing the select again. */
4559 FD_ZERO (&Available
);
4562 redisplay_preserve_echo_area (12);
4565 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4568 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4569 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4571 else if (nread
== -1 && errno
== EAGAIN
)
4575 else if (nread
== -1 && errno
== EAGAIN
)
4577 /* Note that we cannot distinguish between no input
4578 available now and a closed pipe.
4579 With luck, a closed pipe will be accompanied by
4580 subprocess termination and SIGCHLD. */
4581 else if (nread
== 0 && !NETCONN_P (proc
))
4583 #endif /* O_NDELAY */
4584 #endif /* O_NONBLOCK */
4586 /* On some OSs with ptys, when the process on one end of
4587 a pty exits, the other end gets an error reading with
4588 errno = EIO instead of getting an EOF (0 bytes read).
4589 Therefore, if we get an error reading and errno =
4590 EIO, just continue, because the child process has
4591 exited and should clean itself up soon (e.g. when we
4594 However, it has been known to happen that the SIGCHLD
4595 got lost. So raise the signl again just in case.
4597 else if (nread
== -1 && errno
== EIO
)
4598 kill (getpid (), SIGCHLD
);
4599 #endif /* HAVE_PTYS */
4600 /* If we can detect process termination, don't consider the process
4601 gone just because its pipe is closed. */
4603 else if (nread
== 0 && !NETCONN_P (proc
))
4608 /* Preserve status of processes already terminated. */
4609 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
4610 deactivate_process (proc
);
4611 if (!NILP (XPROCESS (proc
)->raw_status_low
))
4612 update_status (XPROCESS (proc
));
4613 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4614 XPROCESS (proc
)->status
4615 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
4618 #ifdef NON_BLOCKING_CONNECT
4619 if (check_connect
&& FD_ISSET (channel
, &Connecting
)
4620 && FD_ISSET (channel
, &connect_wait_mask
))
4622 struct Lisp_Process
*p
;
4624 FD_CLR (channel
, &connect_wait_mask
);
4625 if (--num_pending_connects
< 0)
4628 proc
= chan_process
[channel
];
4632 p
= XPROCESS (proc
);
4635 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4636 So only use it on systems where it is known to work. */
4638 int xlen
= sizeof(xerrno
);
4639 if (getsockopt(channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4644 struct sockaddr pname
;
4645 int pnamelen
= sizeof(pname
);
4647 /* If connection failed, getpeername will fail. */
4649 if (getpeername(channel
, &pname
, &pnamelen
) < 0)
4651 /* Obtain connect failure code through error slippage. */
4654 if (errno
== ENOTCONN
&& read(channel
, &dummy
, 1) < 0)
4661 XSETINT (p
->tick
, ++process_tick
);
4662 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
4663 deactivate_process (proc
);
4668 /* Execute the sentinel here. If we had relied on
4669 status_notify to do it later, it will read input
4670 from the process before calling the sentinel. */
4671 exec_sentinel (proc
, build_string ("open\n"));
4672 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4674 FD_SET (XINT (p
->infd
), &input_wait_mask
);
4675 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
4679 #endif /* NON_BLOCKING_CONNECT */
4680 } /* end for each file descriptor */
4681 } /* end while exit conditions not met */
4683 waiting_for_user_input_p
= saved_waiting_for_user_input_p
;
4685 /* If calling from keyboard input, do not quit
4686 since we want to return C-g as an input character.
4687 Otherwise, do pending quit if requested. */
4690 /* Prevent input_pending from remaining set if we quit. */
4691 clear_input_pending ();
4694 #ifdef POLL_INTERRUPTED_SYS_CALL
4695 /* AlainF 5-Jul-1996
4696 HP-UX 10.10 seems to have problems with signals coming in
4697 Causes "poll: interrupted system call" messages when Emacs is run
4699 Turn periodic alarms back on */
4701 #endif /* POLL_INTERRUPTED_SYS_CALL */
4703 return got_some_input
;
4706 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
4709 read_process_output_call (fun_and_args
)
4710 Lisp_Object fun_and_args
;
4712 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
4716 read_process_output_error_handler (error
)
4719 cmd_error_internal (error
, "error in process filter: ");
4721 update_echo_area ();
4722 Fsleep_for (make_number (2), Qnil
);
4726 /* Read pending output from the process channel,
4727 starting with our buffered-ahead character if we have one.
4728 Yield number of decoded characters read.
4730 This function reads at most 4096 characters.
4731 If you want to read all available subprocess output,
4732 you must call it repeatedly until it returns zero.
4734 The characters read are decoded according to PROC's coding-system
4738 read_process_output (proc
, channel
)
4740 register int channel
;
4742 register int nbytes
;
4744 register Lisp_Object outstream
;
4745 register struct buffer
*old
= current_buffer
;
4746 register struct Lisp_Process
*p
= XPROCESS (proc
);
4747 register int opoint
;
4748 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
4749 int carryover
= XINT (p
->decoding_carryover
);
4753 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
4755 vs
= get_vms_process_pointer (p
->pid
);
4759 return (0); /* Really weird if it does this */
4760 if (!(vs
->iosb
[0] & 1))
4761 return -1; /* I/O error */
4764 error ("Could not get VMS process pointer");
4765 chars
= vs
->inputBuffer
;
4766 nbytes
= clean_vms_buffer (chars
, vs
->iosb
[1]);
4769 start_vms_process_read (vs
); /* Crank up the next read on the process */
4770 return 1; /* Nothing worth printing, say we got 1 */
4774 /* The data carried over in the previous decoding (which are at
4775 the tail of decoding buffer) should be prepended to the new
4776 data read to decode all together. */
4777 chars
= (char *) alloca (nbytes
+ carryover
);
4778 bcopy (SDATA (p
->decoding_buf
), buf
, carryover
);
4779 bcopy (vs
->inputBuffer
, chars
+ carryover
, nbytes
);
4783 chars
= (char *) alloca (carryover
+ readmax
);
4785 /* See the comment above. */
4786 bcopy (SDATA (p
->decoding_buf
), chars
, carryover
);
4788 #ifdef DATAGRAM_SOCKETS
4789 /* We have a working select, so proc_buffered_char is always -1. */
4790 if (DATAGRAM_CHAN_P (channel
))
4792 int len
= datagram_address
[channel
].len
;
4793 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
4794 0, datagram_address
[channel
].sa
, &len
);
4798 if (proc_buffered_char
[channel
] < 0)
4800 nbytes
= emacs_read (channel
, chars
+ carryover
, readmax
);
4801 #ifdef ADAPTIVE_READ_BUFFERING
4802 if (nbytes
> 0 && !NILP (p
->adaptive_read_buffering
))
4804 int delay
= XINT (p
->read_output_delay
);
4807 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
4810 process_output_delay_count
++;
4811 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
4814 else if (delay
> 0 && (nbytes
== readmax
))
4816 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
4818 process_output_delay_count
--;
4820 XSETINT (p
->read_output_delay
, delay
);
4823 p
->read_output_skip
= Qt
;
4824 process_output_skip
= 1;
4831 chars
[carryover
] = proc_buffered_char
[channel
];
4832 proc_buffered_char
[channel
] = -1;
4833 nbytes
= emacs_read (channel
, chars
+ carryover
+ 1, readmax
- 1);
4837 nbytes
= nbytes
+ 1;
4839 #endif /* not VMS */
4841 XSETINT (p
->decoding_carryover
, 0);
4843 /* At this point, NBYTES holds number of bytes just received
4844 (including the one in proc_buffered_char[channel]). */
4847 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
4849 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
4852 /* Now set NBYTES how many bytes we must decode. */
4853 nbytes
+= carryover
;
4855 /* Read and dispose of the process output. */
4856 outstream
= p
->filter
;
4857 if (!NILP (outstream
))
4859 /* We inhibit quit here instead of just catching it so that
4860 hitting ^G when a filter happens to be running won't screw
4862 int count
= SPECPDL_INDEX ();
4863 Lisp_Object odeactivate
;
4864 Lisp_Object obuffer
, okeymap
;
4866 int outer_running_asynch_code
= running_asynch_code
;
4867 int waiting
= waiting_for_user_input_p
;
4869 /* No need to gcpro these, because all we do with them later
4870 is test them for EQness, and none of them should be a string. */
4871 odeactivate
= Vdeactivate_mark
;
4872 XSETBUFFER (obuffer
, current_buffer
);
4873 okeymap
= current_buffer
->keymap
;
4875 specbind (Qinhibit_quit
, Qt
);
4876 specbind (Qlast_nonmenu_event
, Qt
);
4878 /* In case we get recursively called,
4879 and we already saved the match data nonrecursively,
4880 save the same match data in safely recursive fashion. */
4881 if (outer_running_asynch_code
)
4884 /* Don't clobber the CURRENT match data, either! */
4885 tem
= Fmatch_data (Qnil
, Qnil
);
4886 restore_match_data ();
4887 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
4888 Fset_match_data (tem
);
4891 /* For speed, if a search happens within this code,
4892 save the match data in a special nonrecursive fashion. */
4893 running_asynch_code
= 1;
4895 decode_coding_c_string (coding
, chars
, nbytes
, Qt
);
4896 text
= coding
->dst_object
;
4897 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
4898 /* A new coding system might be found. */
4899 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
4901 p
->decode_coding_system
= Vlast_coding_system_used
;
4903 /* Don't call setup_coding_system for
4904 proc_decode_coding_system[channel] here. It is done in
4905 detect_coding called via decode_coding above. */
4907 /* If a coding system for encoding is not yet decided, we set
4908 it as the same as coding-system for decoding.
4910 But, before doing that we must check if
4911 proc_encode_coding_system[p->outfd] surely points to a
4912 valid memory because p->outfd will be changed once EOF is
4913 sent to the process. */
4914 if (NILP (p
->encode_coding_system
)
4915 && proc_encode_coding_system
[XINT (p
->outfd
)])
4917 p
->encode_coding_system
= Vlast_coding_system_used
;
4918 setup_coding_system (p
->encode_coding_system
,
4919 proc_encode_coding_system
[XINT (p
->outfd
)]);
4923 if (coding
->carryover_bytes
> 0)
4925 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
4926 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
4927 bcopy (coding
->carryover
, SDATA (p
->decoding_buf
),
4928 coding
->carryover_bytes
);
4929 XSETINT (p
->decoding_carryover
, coding
->carryover_bytes
);
4931 /* Adjust the multibyteness of TEXT to that of the filter. */
4932 if (NILP (p
->filter_multibyte
) != ! STRING_MULTIBYTE (text
))
4933 text
= (STRING_MULTIBYTE (text
)
4934 ? Fstring_as_unibyte (text
)
4935 : Fstring_to_multibyte (text
));
4936 if (SBYTES (text
) > 0)
4937 internal_condition_case_1 (read_process_output_call
,
4939 Fcons (proc
, Fcons (text
, Qnil
))),
4940 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
4941 read_process_output_error_handler
);
4943 /* If we saved the match data nonrecursively, restore it now. */
4944 restore_match_data ();
4945 running_asynch_code
= outer_running_asynch_code
;
4947 /* Handling the process output should not deactivate the mark. */
4948 Vdeactivate_mark
= odeactivate
;
4950 /* Restore waiting_for_user_input_p as it was
4951 when we were called, in case the filter clobbered it. */
4952 waiting_for_user_input_p
= waiting
;
4954 #if 0 /* Call record_asynch_buffer_change unconditionally,
4955 because we might have changed minor modes or other things
4956 that affect key bindings. */
4957 if (! EQ (Fcurrent_buffer (), obuffer
)
4958 || ! EQ (current_buffer
->keymap
, okeymap
))
4960 /* But do it only if the caller is actually going to read events.
4961 Otherwise there's no need to make him wake up, and it could
4962 cause trouble (for example it would make Fsit_for return). */
4963 if (waiting_for_user_input_p
== -1)
4964 record_asynch_buffer_change ();
4967 start_vms_process_read (vs
);
4969 unbind_to (count
, Qnil
);
4973 /* If no filter, write into buffer if it isn't dead. */
4974 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
4976 Lisp_Object old_read_only
;
4977 int old_begv
, old_zv
;
4978 int old_begv_byte
, old_zv_byte
;
4979 Lisp_Object odeactivate
;
4980 int before
, before_byte
;
4985 odeactivate
= Vdeactivate_mark
;
4987 Fset_buffer (p
->buffer
);
4989 opoint_byte
= PT_BYTE
;
4990 old_read_only
= current_buffer
->read_only
;
4993 old_begv_byte
= BEGV_BYTE
;
4994 old_zv_byte
= ZV_BYTE
;
4996 current_buffer
->read_only
= Qnil
;
4998 /* Insert new output into buffer
4999 at the current end-of-output marker,
5000 thus preserving logical ordering of input and output. */
5001 if (XMARKER (p
->mark
)->buffer
)
5002 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
5003 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
5006 SET_PT_BOTH (ZV
, ZV_BYTE
);
5008 before_byte
= PT_BYTE
;
5010 /* If the output marker is outside of the visible region, save
5011 the restriction and widen. */
5012 if (! (BEGV
<= PT
&& PT
<= ZV
))
5015 decode_coding_c_string (coding
, chars
, nbytes
, Qt
);
5016 text
= coding
->dst_object
;
5017 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5018 /* A new coding system might be found. See the comment in the
5019 similar code in the previous `if' block. */
5020 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5022 p
->decode_coding_system
= Vlast_coding_system_used
;
5023 if (NILP (p
->encode_coding_system
)
5024 && proc_encode_coding_system
[XINT (p
->outfd
)])
5026 p
->encode_coding_system
= Vlast_coding_system_used
;
5027 setup_coding_system (p
->encode_coding_system
,
5028 proc_encode_coding_system
[XINT (p
->outfd
)]);
5031 if (coding
->carryover_bytes
> 0)
5033 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5034 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5035 bcopy (coding
->carryover
, SDATA (p
->decoding_buf
),
5036 coding
->carryover_bytes
);
5037 XSETINT (p
->decoding_carryover
, coding
->carryover_bytes
);
5039 /* Adjust the multibyteness of TEXT to that of the buffer. */
5040 if (NILP (current_buffer
->enable_multibyte_characters
)
5041 != ! STRING_MULTIBYTE (text
))
5042 text
= (STRING_MULTIBYTE (text
)
5043 ? Fstring_as_unibyte (text
)
5044 : Fstring_to_multibyte (text
));
5045 /* Insert before markers in case we are inserting where
5046 the buffer's mark is, and the user's next command is Meta-y. */
5047 insert_from_string_before_markers (text
, 0, 0,
5048 SCHARS (text
), SBYTES (text
), 0);
5050 /* Make sure the process marker's position is valid when the
5051 process buffer is changed in the signal_after_change above.
5052 W3 is known to do that. */
5053 if (BUFFERP (p
->buffer
)
5054 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5055 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5057 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5059 update_mode_lines
++;
5061 /* Make sure opoint and the old restrictions
5062 float ahead of any new text just as point would. */
5063 if (opoint
>= before
)
5065 opoint
+= PT
- before
;
5066 opoint_byte
+= PT_BYTE
- before_byte
;
5068 if (old_begv
> before
)
5070 old_begv
+= PT
- before
;
5071 old_begv_byte
+= PT_BYTE
- before_byte
;
5073 if (old_zv
>= before
)
5075 old_zv
+= PT
- before
;
5076 old_zv_byte
+= PT_BYTE
- before_byte
;
5079 /* If the restriction isn't what it should be, set it. */
5080 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5081 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5083 /* Handling the process output should not deactivate the mark. */
5084 Vdeactivate_mark
= odeactivate
;
5086 current_buffer
->read_only
= old_read_only
;
5087 SET_PT_BOTH (opoint
, opoint_byte
);
5088 set_buffer_internal (old
);
5091 start_vms_process_read (vs
);
5096 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
5098 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
5099 This is intended for use by asynchronous process output filters and sentinels. */)
5102 return (waiting_for_user_input_p
? Qt
: Qnil
);
5105 /* Sending data to subprocess */
5107 jmp_buf send_process_frame
;
5108 Lisp_Object process_sent_to
;
5111 send_process_trap ()
5113 SIGNAL_THREAD_CHECK (SIGPIPE
);
5118 longjmp (send_process_frame
, 1);
5121 /* Send some data to process PROC.
5122 BUF is the beginning of the data; LEN is the number of characters.
5123 OBJECT is the Lisp object that the data comes from. If OBJECT is
5124 nil or t, it means that the data comes from C string.
5126 If OBJECT is not nil, the data is encoded by PROC's coding-system
5127 for encoding before it is sent.
5129 This function can evaluate Lisp code and can garbage collect. */
5132 send_process (proc
, buf
, len
, object
)
5133 volatile Lisp_Object proc
;
5134 unsigned char *volatile buf
;
5136 volatile Lisp_Object object
;
5138 /* Use volatile to protect variables from being clobbered by longjmp. */
5139 struct Lisp_Process
*p
= XPROCESS (proc
);
5141 struct coding_system
*coding
;
5142 struct gcpro gcpro1
;
5147 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
5150 if (! NILP (p
->raw_status_low
))
5152 if (! EQ (p
->status
, Qrun
))
5153 error ("Process %s not running", SDATA (p
->name
));
5154 if (XINT (p
->outfd
) < 0)
5155 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5157 coding
= proc_encode_coding_system
[XINT (p
->outfd
)];
5158 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5160 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5161 || (BUFFERP (object
)
5162 && !NILP (XBUFFER (object
)->enable_multibyte_characters
))
5165 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
5166 /* The coding system for encoding was changed to raw-text
5167 because we sent a unibyte text previously. Now we are
5168 sending a multibyte text, thus we must encode it by the
5169 original coding system specified for the current process. */
5170 setup_coding_system (p
->encode_coding_system
, coding
);
5171 coding
->src_multibyte
= 1;
5175 /* For sending a unibyte text, character code conversion should
5176 not take place but EOL conversion should. So, setup raw-text
5177 or one of the subsidiary if we have not yet done it. */
5178 if (CODING_REQUIRE_ENCODING (coding
))
5180 if (CODING_REQUIRE_FLUSHING (coding
))
5182 /* But, before changing the coding, we must flush out data. */
5183 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5184 send_process (proc
, "", 0, Qt
);
5185 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
5187 setup_coding_system (raw_text_coding_system
5188 (Vlast_coding_system_used
),
5190 coding
->src_multibyte
= 0;
5193 coding
->dst_multibyte
= 0;
5195 if (CODING_REQUIRE_ENCODING (coding
))
5197 coding
->dst_object
= Qt
;
5198 if (BUFFERP (object
))
5200 int from_byte
, from
, to
;
5201 int save_pt
, save_pt_byte
;
5202 struct buffer
*cur
= current_buffer
;
5204 set_buffer_internal (XBUFFER (object
));
5205 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
5207 from_byte
= PTR_BYTE_POS (buf
);
5208 from
= BYTE_TO_CHAR (from_byte
);
5209 to
= BYTE_TO_CHAR (from_byte
+ len
);
5210 TEMP_SET_PT_BOTH (from
, from_byte
);
5211 encode_coding_object (coding
, object
, from
, from_byte
,
5212 to
, from_byte
+ len
, Qt
);
5213 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
5214 set_buffer_internal (cur
);
5216 else if (STRINGP (object
))
5218 encode_coding_string (coding
, object
, 1);
5222 coding
->dst_object
= make_unibyte_string (buf
, len
);
5223 coding
->produced
= len
;
5226 len
= coding
->produced
;
5227 buf
= SDATA (coding
->dst_object
);
5231 vs
= get_vms_process_pointer (p
->pid
);
5233 error ("Could not find this process: %x", p
->pid
);
5234 else if (write_to_vms_process (vs
, buf
, len
))
5238 if (pty_max_bytes
== 0)
5240 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5241 pty_max_bytes
= fpathconf (XFASTINT (p
->outfd
), _PC_MAX_CANON
);
5242 if (pty_max_bytes
< 0)
5243 pty_max_bytes
= 250;
5245 pty_max_bytes
= 250;
5247 /* Deduct one, to leave space for the eof. */
5251 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
5252 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
5253 when returning with longjmp despite being declared volatile. */
5254 if (!setjmp (send_process_frame
))
5256 process_sent_to
= proc
;
5260 SIGTYPE (*old_sigpipe
)();
5262 /* Decide how much data we can send in one batch.
5263 Long lines need to be split into multiple batches. */
5264 if (!NILP (p
->pty_flag
))
5266 /* Starting this at zero is always correct when not the first
5267 iteration because the previous iteration ended by sending C-d.
5268 It may not be correct for the first iteration
5269 if a partial line was sent in a separate send_process call.
5270 If that proves worth handling, we need to save linepos
5271 in the process object. */
5273 unsigned char *ptr
= (unsigned char *) buf
;
5274 unsigned char *end
= (unsigned char *) buf
+ len
;
5276 /* Scan through this text for a line that is too long. */
5277 while (ptr
!= end
&& linepos
< pty_max_bytes
)
5285 /* If we found one, break the line there
5286 and put in a C-d to force the buffer through. */
5290 /* Send this batch, using one or more write calls. */
5293 int outfd
= XINT (p
->outfd
);
5294 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
5295 #ifdef DATAGRAM_SOCKETS
5296 if (DATAGRAM_CHAN_P (outfd
))
5298 rv
= sendto (outfd
, (char *) buf
, this,
5299 0, datagram_address
[outfd
].sa
,
5300 datagram_address
[outfd
].len
);
5301 if (rv
< 0 && errno
== EMSGSIZE
)
5302 report_file_error ("sending datagram", Fcons (proc
, Qnil
));
5307 rv
= emacs_write (outfd
, (char *) buf
, this);
5308 #ifdef ADAPTIVE_READ_BUFFERING
5309 if (XINT (p
->read_output_delay
) > 0
5310 && EQ (p
->adaptive_read_buffering
, Qt
))
5312 XSETFASTINT (p
->read_output_delay
, 0);
5313 process_output_delay_count
--;
5314 p
->read_output_skip
= Qnil
;
5318 signal (SIGPIPE
, old_sigpipe
);
5324 || errno
== EWOULDBLOCK
5330 /* Buffer is full. Wait, accepting input;
5331 that may allow the program
5332 to finish doing output and read more. */
5336 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5337 /* A gross hack to work around a bug in FreeBSD.
5338 In the following sequence, read(2) returns
5342 write(2) 954 bytes, get EAGAIN
5343 read(2) 1024 bytes in process_read_output
5344 read(2) 11 bytes in process_read_output
5346 That is, read(2) returns more bytes than have
5347 ever been written successfully. The 1033 bytes
5348 read are the 1022 bytes written successfully
5349 after processing (for example with CRs added if
5350 the terminal is set up that way which it is
5351 here). The same bytes will be seen again in a
5352 later read(2), without the CRs. */
5354 if (errno
== EAGAIN
)
5357 ioctl (XINT (p
->outfd
), TIOCFLUSH
, &flags
);
5359 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5361 /* Running filters might relocate buffers or strings.
5362 Arrange to relocate BUF. */
5363 if (BUFFERP (object
))
5364 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
5365 else if (STRINGP (object
))
5366 offset
= buf
- SDATA (object
);
5368 #ifdef EMACS_HAS_USECS
5369 wait_reading_process_output (0, 20000, 0, 0, Qnil
, NULL
, 0);
5371 wait_reading_process_output (1, 0, 0, 0, Qnil
, NULL
, 0);
5374 if (BUFFERP (object
))
5375 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
5376 else if (STRINGP (object
))
5377 buf
= offset
+ SDATA (object
);
5382 /* This is a real error. */
5383 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5390 /* If we sent just part of the string, put in an EOF
5391 to force it through, before we send the rest. */
5393 Fprocess_send_eof (proc
);
5396 #endif /* not VMS */
5400 proc
= process_sent_to
;
5401 p
= XPROCESS (proc
);
5403 p
->raw_status_low
= Qnil
;
5404 p
->raw_status_high
= Qnil
;
5405 p
->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5406 XSETINT (p
->tick
, ++process_tick
);
5407 deactivate_process (proc
);
5409 error ("Error writing to process %s; closed it", SDATA (p
->name
));
5411 error ("SIGPIPE raised on process %s; closed it", SDATA (p
->name
));
5418 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5420 doc
: /* Send current contents of region as input to PROCESS.
5421 PROCESS may be a process, a buffer, the name of a process or buffer, or
5422 nil, indicating the current buffer's process.
5423 Called from program, takes three arguments, PROCESS, START and END.
5424 If the region is more than 500 characters long,
5425 it is sent in several bunches. This may happen even for shorter regions.
5426 Output from processes can arrive in between bunches. */)
5427 (process
, start
, end
)
5428 Lisp_Object process
, start
, end
;
5433 proc
= get_process (process
);
5434 validate_region (&start
, &end
);
5436 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5437 move_gap (XINT (start
));
5439 start1
= CHAR_TO_BYTE (XINT (start
));
5440 end1
= CHAR_TO_BYTE (XINT (end
));
5441 send_process (proc
, BYTE_POS_ADDR (start1
), end1
- start1
,
5442 Fcurrent_buffer ());
5447 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5449 doc
: /* Send PROCESS the contents of STRING as input.
5450 PROCESS may be a process, a buffer, the name of a process or buffer, or
5451 nil, indicating the current buffer's process.
5452 If STRING is more than 500 characters long,
5453 it is sent in several bunches. This may happen even for shorter strings.
5454 Output from processes can arrive in between bunches. */)
5456 Lisp_Object process
, string
;
5459 CHECK_STRING (string
);
5460 proc
= get_process (process
);
5461 send_process (proc
, SDATA (string
),
5462 SBYTES (string
), string
);
5466 /* Return the foreground process group for the tty/pty that
5467 the process P uses. */
5469 emacs_get_tty_pgrp (p
)
5470 struct Lisp_Process
*p
;
5475 if (ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5478 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5479 master side. Try the slave side. */
5480 fd
= emacs_open (XSTRING (p
->tty_name
)->data
, O_RDONLY
, 0);
5484 ioctl (fd
, TIOCGPGRP
, &gid
);
5488 #endif /* defined (TIOCGPGRP ) */
5493 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5494 Sprocess_running_child_p
, 0, 1, 0,
5495 doc
: /* Return t if PROCESS has given the terminal to a child.
5496 If the operating system does not make it possible to find out,
5497 return t unconditionally. */)
5499 Lisp_Object process
;
5501 /* Initialize in case ioctl doesn't exist or gives an error,
5502 in a way that will cause returning t. */
5505 struct Lisp_Process
*p
;
5507 proc
= get_process (process
);
5508 p
= XPROCESS (proc
);
5510 if (!EQ (p
->childp
, Qt
))
5511 error ("Process %s is not a subprocess",
5513 if (XINT (p
->infd
) < 0)
5514 error ("Process %s is not active",
5517 gid
= emacs_get_tty_pgrp (p
);
5519 if (gid
== XFASTINT (p
->pid
))
5524 /* send a signal number SIGNO to PROCESS.
5525 If CURRENT_GROUP is t, that means send to the process group
5526 that currently owns the terminal being used to communicate with PROCESS.
5527 This is used for various commands in shell mode.
5528 If CURRENT_GROUP is lambda, that means send to the process group
5529 that currently owns the terminal, but only if it is NOT the shell itself.
5531 If NOMSG is zero, insert signal-announcements into process's buffers
5534 If we can, we try to signal PROCESS by sending control characters
5535 down the pty. This allows us to signal inferiors who have changed
5536 their uid, for which killpg would return an EPERM error. */
5539 process_send_signal (process
, signo
, current_group
, nomsg
)
5540 Lisp_Object process
;
5542 Lisp_Object current_group
;
5546 register struct Lisp_Process
*p
;
5550 proc
= get_process (process
);
5551 p
= XPROCESS (proc
);
5553 if (!EQ (p
->childp
, Qt
))
5554 error ("Process %s is not a subprocess",
5556 if (XINT (p
->infd
) < 0)
5557 error ("Process %s is not active",
5560 if (NILP (p
->pty_flag
))
5561 current_group
= Qnil
;
5563 /* If we are using pgrps, get a pgrp number and make it negative. */
5564 if (NILP (current_group
))
5565 /* Send the signal to the shell's process group. */
5566 gid
= XFASTINT (p
->pid
);
5569 #ifdef SIGNALS_VIA_CHARACTERS
5570 /* If possible, send signals to the entire pgrp
5571 by sending an input character to it. */
5573 /* TERMIOS is the latest and bestest, and seems most likely to
5574 work. If the system has it, use it. */
5577 cc_t
*sig_char
= NULL
;
5579 tcgetattr (XINT (p
->infd
), &t
);
5584 sig_char
= &t
.c_cc
[VINTR
];
5588 sig_char
= &t
.c_cc
[VQUIT
];
5592 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5593 sig_char
= &t
.c_cc
[VSWTCH
];
5595 sig_char
= &t
.c_cc
[VSUSP
];
5600 if (sig_char
&& *sig_char
!= CDISABLE
)
5602 send_process (proc
, sig_char
, 1, Qnil
);
5605 /* If we can't send the signal with a character,
5606 fall through and send it another way. */
5607 #else /* ! HAVE_TERMIOS */
5609 /* On Berkeley descendants, the following IOCTL's retrieve the
5610 current control characters. */
5611 #if defined (TIOCGLTC) && defined (TIOCGETC)
5619 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
5620 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
5623 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
5624 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
5628 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
5629 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
5631 #endif /* ! defined (SIGTSTP) */
5634 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
5636 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
5643 ioctl (XINT (p
->infd
), TCGETA
, &t
);
5644 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
5647 ioctl (XINT (p
->infd
), TCGETA
, &t
);
5648 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
5652 ioctl (XINT (p
->infd
), TCGETA
, &t
);
5653 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
5655 #endif /* ! defined (SIGTSTP) */
5657 #else /* ! defined (TCGETA) */
5658 Your configuration files are messed up
.
5659 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
5660 you'd better be using one of the alternatives above! */
5661 #endif /* ! defined (TCGETA) */
5662 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
5663 /* In this case, the code above should alway returns. */
5665 #endif /* ! defined HAVE_TERMIOS */
5667 /* The code above may fall through if it can't
5668 handle the signal. */
5669 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5672 /* Get the current pgrp using the tty itself, if we have that.
5673 Otherwise, use the pty to get the pgrp.
5674 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5675 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5676 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5677 His patch indicates that if TIOCGPGRP returns an error, then
5678 we should just assume that p->pid is also the process group id. */
5680 gid
= emacs_get_tty_pgrp (p
);
5683 /* If we can't get the information, assume
5684 the shell owns the tty. */
5685 gid
= XFASTINT (p
->pid
);
5687 /* It is not clear whether anything really can set GID to -1.
5688 Perhaps on some system one of those ioctls can or could do so.
5689 Or perhaps this is vestigial. */
5692 #else /* ! defined (TIOCGPGRP ) */
5693 /* Can't select pgrps on this system, so we know that
5694 the child itself heads the pgrp. */
5695 gid
= XFASTINT (p
->pid
);
5696 #endif /* ! defined (TIOCGPGRP ) */
5698 /* If current_group is lambda, and the shell owns the terminal,
5699 don't send any signal. */
5700 if (EQ (current_group
, Qlambda
) && gid
== XFASTINT (p
->pid
))
5708 p
->raw_status_low
= Qnil
;
5709 p
->raw_status_high
= Qnil
;
5711 XSETINT (p
->tick
, ++process_tick
);
5715 #endif /* ! defined (SIGCONT) */
5718 send_process (proc
, "\003", 1, Qnil
); /* ^C */
5723 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
5728 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
5731 flush_pending_output (XINT (p
->infd
));
5735 /* If we don't have process groups, send the signal to the immediate
5736 subprocess. That isn't really right, but it's better than any
5737 obvious alternative. */
5740 kill (XFASTINT (p
->pid
), signo
);
5744 /* gid may be a pid, or minus a pgrp's number */
5746 if (!NILP (current_group
))
5748 if (ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
) == -1)
5749 EMACS_KILLPG (gid
, signo
);
5753 gid
= - XFASTINT (p
->pid
);
5756 #else /* ! defined (TIOCSIGSEND) */
5757 EMACS_KILLPG (gid
, signo
);
5758 #endif /* ! defined (TIOCSIGSEND) */
5761 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
5762 doc
: /* Interrupt process PROCESS.
5763 PROCESS may be a process, a buffer, or the name of a process or buffer.
5764 No arg or nil means current buffer's process.
5765 Second arg CURRENT-GROUP non-nil means send signal to
5766 the current process-group of the process's controlling terminal
5767 rather than to the process's own process group.
5768 If the process is a shell, this means interrupt current subjob
5769 rather than the shell.
5771 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
5772 don't send the signal. */)
5773 (process
, current_group
)
5774 Lisp_Object process
, current_group
;
5776 process_send_signal (process
, SIGINT
, current_group
, 0);
5780 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
5781 doc
: /* Kill process PROCESS. May be process or name of one.
5782 See function `interrupt-process' for more details on usage. */)
5783 (process
, current_group
)
5784 Lisp_Object process
, current_group
;
5786 process_send_signal (process
, SIGKILL
, current_group
, 0);
5790 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
5791 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
5792 See function `interrupt-process' for more details on usage. */)
5793 (process
, current_group
)
5794 Lisp_Object process
, current_group
;
5796 process_send_signal (process
, SIGQUIT
, current_group
, 0);
5800 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
5801 doc
: /* Stop process PROCESS. May be process or name of one.
5802 See function `interrupt-process' for more details on usage.
5803 If PROCESS is a network process, inhibit handling of incoming traffic. */)
5804 (process
, current_group
)
5805 Lisp_Object process
, current_group
;
5808 if (PROCESSP (process
) && NETCONN_P (process
))
5810 struct Lisp_Process
*p
;
5812 p
= XPROCESS (process
);
5813 if (NILP (p
->command
)
5814 && XINT (p
->infd
) >= 0)
5816 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
5817 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
5824 error ("no SIGTSTP support");
5826 process_send_signal (process
, SIGTSTP
, current_group
, 0);
5831 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
5832 doc
: /* Continue process PROCESS. May be process or name of one.
5833 See function `interrupt-process' for more details on usage.
5834 If PROCESS is a network process, resume handling of incoming traffic. */)
5835 (process
, current_group
)
5836 Lisp_Object process
, current_group
;
5839 if (PROCESSP (process
) && NETCONN_P (process
))
5841 struct Lisp_Process
*p
;
5843 p
= XPROCESS (process
);
5844 if (EQ (p
->command
, Qt
)
5845 && XINT (p
->infd
) >= 0
5846 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
5848 FD_SET (XINT (p
->infd
), &input_wait_mask
);
5849 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
5856 process_send_signal (process
, SIGCONT
, current_group
, 0);
5858 error ("no SIGCONT support");
5863 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
5864 2, 2, "sProcess (name or number): \nnSignal code: ",
5865 doc
: /* Send PROCESS the signal with code SIGCODE.
5866 PROCESS may also be an integer specifying the process id of the
5867 process to signal; in this case, the process need not be a child of
5869 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
5871 Lisp_Object process
, sigcode
;
5875 if (INTEGERP (process
))
5881 if (STRINGP (process
))
5884 if (tem
= Fget_process (process
), NILP (tem
))
5886 pid
= Fstring_to_number (process
, make_number (10));
5887 if (XINT (pid
) != 0)
5893 process
= get_process (process
);
5898 CHECK_PROCESS (process
);
5899 pid
= XPROCESS (process
)->pid
;
5900 if (!INTEGERP (pid
) || XINT (pid
) <= 0)
5901 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
5905 #define handle_signal(NAME, VALUE) \
5906 else if (!strcmp (name, NAME)) \
5907 XSETINT (sigcode, VALUE)
5909 if (INTEGERP (sigcode
))
5913 unsigned char *name
;
5915 CHECK_SYMBOL (sigcode
);
5916 name
= SDATA (SYMBOL_NAME (sigcode
));
5921 handle_signal ("SIGHUP", SIGHUP
);
5924 handle_signal ("SIGINT", SIGINT
);
5927 handle_signal ("SIGQUIT", SIGQUIT
);
5930 handle_signal ("SIGILL", SIGILL
);
5933 handle_signal ("SIGABRT", SIGABRT
);
5936 handle_signal ("SIGEMT", SIGEMT
);
5939 handle_signal ("SIGKILL", SIGKILL
);
5942 handle_signal ("SIGFPE", SIGFPE
);
5945 handle_signal ("SIGBUS", SIGBUS
);
5948 handle_signal ("SIGSEGV", SIGSEGV
);
5951 handle_signal ("SIGSYS", SIGSYS
);
5954 handle_signal ("SIGPIPE", SIGPIPE
);
5957 handle_signal ("SIGALRM", SIGALRM
);
5960 handle_signal ("SIGTERM", SIGTERM
);
5963 handle_signal ("SIGURG", SIGURG
);
5966 handle_signal ("SIGSTOP", SIGSTOP
);
5969 handle_signal ("SIGTSTP", SIGTSTP
);
5972 handle_signal ("SIGCONT", SIGCONT
);
5975 handle_signal ("SIGCHLD", SIGCHLD
);
5978 handle_signal ("SIGTTIN", SIGTTIN
);
5981 handle_signal ("SIGTTOU", SIGTTOU
);
5984 handle_signal ("SIGIO", SIGIO
);
5987 handle_signal ("SIGXCPU", SIGXCPU
);
5990 handle_signal ("SIGXFSZ", SIGXFSZ
);
5993 handle_signal ("SIGVTALRM", SIGVTALRM
);
5996 handle_signal ("SIGPROF", SIGPROF
);
5999 handle_signal ("SIGWINCH", SIGWINCH
);
6002 handle_signal ("SIGINFO", SIGINFO
);
6005 handle_signal ("SIGUSR1", SIGUSR1
);
6008 handle_signal ("SIGUSR2", SIGUSR2
);
6011 error ("Undefined signal name %s", name
);
6014 #undef handle_signal
6016 return make_number (kill (XINT (pid
), XINT (sigcode
)));
6019 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6020 doc
: /* Make PROCESS see end-of-file in its input.
6021 EOF comes after any text already sent to it.
6022 PROCESS may be a process, a buffer, the name of a process or buffer, or
6023 nil, indicating the current buffer's process.
6024 If PROCESS is a network connection, or is a process communicating
6025 through a pipe (as opposed to a pty), then you cannot send any more
6026 text to PROCESS after you call this function. */)
6028 Lisp_Object process
;
6031 struct coding_system
*coding
;
6033 if (DATAGRAM_CONN_P (process
))
6036 proc
= get_process (process
);
6037 coding
= proc_encode_coding_system
[XINT (XPROCESS (proc
)->outfd
)];
6039 /* Make sure the process is really alive. */
6040 if (! NILP (XPROCESS (proc
)->raw_status_low
))
6041 update_status (XPROCESS (proc
));
6042 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6043 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6045 if (CODING_REQUIRE_FLUSHING (coding
))
6047 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6048 send_process (proc
, "", 0, Qnil
);
6052 send_process (proc
, "\032", 1, Qnil
); /* ^z */
6054 if (!NILP (XPROCESS (proc
)->pty_flag
))
6055 send_process (proc
, "\004", 1, Qnil
);
6058 int old_outfd
, new_outfd
;
6060 #ifdef HAVE_SHUTDOWN
6061 /* If this is a network connection, or socketpair is used
6062 for communication with the subprocess, call shutdown to cause EOF.
6063 (In some old system, shutdown to socketpair doesn't work.
6064 Then we just can't win.) */
6065 if (NILP (XPROCESS (proc
)->pid
)
6066 || XINT (XPROCESS (proc
)->outfd
) == XINT (XPROCESS (proc
)->infd
))
6067 shutdown (XINT (XPROCESS (proc
)->outfd
), 1);
6068 /* In case of socketpair, outfd == infd, so don't close it. */
6069 if (XINT (XPROCESS (proc
)->outfd
) != XINT (XPROCESS (proc
)->infd
))
6070 emacs_close (XINT (XPROCESS (proc
)->outfd
));
6071 #else /* not HAVE_SHUTDOWN */
6072 emacs_close (XINT (XPROCESS (proc
)->outfd
));
6073 #endif /* not HAVE_SHUTDOWN */
6074 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6075 old_outfd
= XINT (XPROCESS (proc
)->outfd
);
6077 if (!proc_encode_coding_system
[new_outfd
])
6078 proc_encode_coding_system
[new_outfd
]
6079 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6080 bcopy (proc_encode_coding_system
[old_outfd
],
6081 proc_encode_coding_system
[new_outfd
],
6082 sizeof (struct coding_system
));
6083 bzero (proc_encode_coding_system
[old_outfd
],
6084 sizeof (struct coding_system
));
6086 XSETINT (XPROCESS (proc
)->outfd
, new_outfd
);
6092 /* Kill all processes associated with `buffer'.
6093 If `buffer' is nil, kill all processes */
6096 kill_buffer_processes (buffer
)
6099 Lisp_Object tail
, proc
;
6101 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6103 proc
= XCDR (XCAR (tail
));
6104 if (GC_PROCESSP (proc
)
6105 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
6107 if (NETCONN_P (proc
))
6108 Fdelete_process (proc
);
6109 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
6110 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
6115 /* On receipt of a signal that a child status has changed, loop asking
6116 about children with changed statuses until the system says there
6119 All we do is change the status; we do not run sentinels or print
6120 notifications. That is saved for the next time keyboard input is
6121 done, in order to avoid timing errors.
6123 ** WARNING: this can be called during garbage collection.
6124 Therefore, it must not be fooled by the presence of mark bits in
6127 ** USG WARNING: Although it is not obvious from the documentation
6128 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6129 signal() before executing at least one wait(), otherwise the
6130 handler will be called again, resulting in an infinite loop. The
6131 relevant portion of the documentation reads "SIGCLD signals will be
6132 queued and the signal-catching function will be continually
6133 reentered until the queue is empty". Invoking signal() causes the
6134 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6137 ** Malloc WARNING: This should never call malloc either directly or
6138 indirectly; if it does, that is a bug */
6141 sigchld_handler (signo
)
6144 int old_errno
= errno
;
6146 register struct Lisp_Process
*p
;
6147 extern EMACS_TIME
*input_available_clear_time
;
6149 SIGNAL_THREAD_CHECK (signo
);
6153 sigheld
|= sigbit (SIGCHLD
);
6165 #endif /* no WUNTRACED */
6166 /* Keep trying to get a status until we get a definitive result. */
6170 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
6172 while (pid
< 0 && errno
== EINTR
);
6176 /* PID == 0 means no processes found, PID == -1 means a real
6177 failure. We have done all our job, so return. */
6179 /* USG systems forget handlers when they are used;
6180 must reestablish each time */
6181 #if defined (USG) && !defined (POSIX_SIGNALS)
6182 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
6185 sigheld
&= ~sigbit (SIGCHLD
);
6193 #endif /* no WNOHANG */
6195 /* Find the process that signaled us, and record its status. */
6198 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6200 proc
= XCDR (XCAR (tail
));
6201 p
= XPROCESS (proc
);
6202 if (GC_EQ (p
->childp
, Qt
) && XINT (p
->pid
) == pid
)
6207 /* Look for an asynchronous process whose pid hasn't been filled
6210 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6212 proc
= XCDR (XCAR (tail
));
6213 p
= XPROCESS (proc
);
6214 if (GC_INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
6219 /* Change the status of the process that was found. */
6222 union { int i
; WAITTYPE wt
; } u
;
6223 int clear_desc_flag
= 0;
6225 XSETINT (p
->tick
, ++process_tick
);
6227 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
6228 XSETINT (p
->raw_status_high
, u
.i
>> 16);
6230 /* If process has terminated, stop waiting for its output. */
6231 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6232 && XINT (p
->infd
) >= 0)
6233 clear_desc_flag
= 1;
6235 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6236 if (clear_desc_flag
)
6238 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
6239 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
6242 /* Tell wait_reading_process_output that it needs to wake up and
6244 if (input_available_clear_time
)
6245 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6248 /* There was no asynchronous process found for that id. Check
6249 if we have a synchronous process. */
6252 synch_process_alive
= 0;
6254 /* Report the status of the synchronous process. */
6256 synch_process_retcode
= WRETCODE (w
);
6257 else if (WIFSIGNALED (w
))
6258 synch_process_termsig
= WTERMSIG (w
);
6260 /* Tell wait_reading_process_output that it needs to wake up and
6262 if (input_available_clear_time
)
6263 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6266 /* On some systems, we must return right away.
6267 If any more processes want to signal us, we will
6269 Otherwise (on systems that have WNOHANG), loop around
6270 to use up all the processes that have something to tell us. */
6271 #if (defined WINDOWSNT \
6272 || (defined USG && !defined GNU_LINUX \
6273 && !(defined HPUX && defined WNOHANG)))
6274 #if defined (USG) && ! defined (POSIX_SIGNALS)
6275 signal (signo
, sigchld_handler
);
6279 #endif /* USG, but not HPUX with WNOHANG */
6285 exec_sentinel_unwind (data
)
6288 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
6293 exec_sentinel_error_handler (error
)
6296 cmd_error_internal (error
, "error in process sentinel: ");
6298 update_echo_area ();
6299 Fsleep_for (make_number (2), Qnil
);
6304 exec_sentinel (proc
, reason
)
6305 Lisp_Object proc
, reason
;
6307 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
6308 register struct Lisp_Process
*p
= XPROCESS (proc
);
6309 int count
= SPECPDL_INDEX ();
6310 int outer_running_asynch_code
= running_asynch_code
;
6311 int waiting
= waiting_for_user_input_p
;
6313 /* No need to gcpro these, because all we do with them later
6314 is test them for EQness, and none of them should be a string. */
6315 odeactivate
= Vdeactivate_mark
;
6316 XSETBUFFER (obuffer
, current_buffer
);
6317 okeymap
= current_buffer
->keymap
;
6319 sentinel
= p
->sentinel
;
6320 if (NILP (sentinel
))
6323 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6324 assure that it gets restored no matter how the sentinel exits. */
6326 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6327 /* Inhibit quit so that random quits don't screw up a running filter. */
6328 specbind (Qinhibit_quit
, Qt
);
6329 specbind (Qlast_nonmenu_event
, Qt
);
6331 /* In case we get recursively called,
6332 and we already saved the match data nonrecursively,
6333 save the same match data in safely recursive fashion. */
6334 if (outer_running_asynch_code
)
6337 tem
= Fmatch_data (Qnil
, Qnil
);
6338 restore_match_data ();
6339 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
6340 Fset_match_data (tem
);
6343 /* For speed, if a search happens within this code,
6344 save the match data in a special nonrecursive fashion. */
6345 running_asynch_code
= 1;
6347 internal_condition_case_1 (read_process_output_call
,
6349 Fcons (proc
, Fcons (reason
, Qnil
))),
6350 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6351 exec_sentinel_error_handler
);
6353 /* If we saved the match data nonrecursively, restore it now. */
6354 restore_match_data ();
6355 running_asynch_code
= outer_running_asynch_code
;
6357 Vdeactivate_mark
= odeactivate
;
6359 /* Restore waiting_for_user_input_p as it was
6360 when we were called, in case the filter clobbered it. */
6361 waiting_for_user_input_p
= waiting
;
6364 if (! EQ (Fcurrent_buffer (), obuffer
)
6365 || ! EQ (current_buffer
->keymap
, okeymap
))
6367 /* But do it only if the caller is actually going to read events.
6368 Otherwise there's no need to make him wake up, and it could
6369 cause trouble (for example it would make Fsit_for return). */
6370 if (waiting_for_user_input_p
== -1)
6371 record_asynch_buffer_change ();
6373 unbind_to (count
, Qnil
);
6376 /* Report all recent events of a change in process status
6377 (either run the sentinel or output a message).
6378 This is usually done while Emacs is waiting for keyboard input
6379 but can be done at other times. */
6384 register Lisp_Object proc
, buffer
;
6385 Lisp_Object tail
, msg
;
6386 struct gcpro gcpro1
, gcpro2
;
6390 /* We need to gcpro tail; if read_process_output calls a filter
6391 which deletes a process and removes the cons to which tail points
6392 from Vprocess_alist, and then causes a GC, tail is an unprotected
6396 /* Set this now, so that if new processes are created by sentinels
6397 that we run, we get called again to handle their status changes. */
6398 update_tick
= process_tick
;
6400 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
6403 register struct Lisp_Process
*p
;
6405 proc
= Fcdr (Fcar (tail
));
6406 p
= XPROCESS (proc
);
6408 if (XINT (p
->tick
) != XINT (p
->update_tick
))
6410 XSETINT (p
->update_tick
, XINT (p
->tick
));
6412 /* If process is still active, read any output that remains. */
6413 while (! EQ (p
->filter
, Qt
)
6414 && ! EQ (p
->status
, Qconnect
)
6415 && ! EQ (p
->status
, Qlisten
)
6416 && ! EQ (p
->command
, Qt
) /* Network process not stopped. */
6417 && XINT (p
->infd
) >= 0
6418 && read_process_output (proc
, XINT (p
->infd
)) > 0);
6422 /* Get the text to use for the message. */
6423 if (!NILP (p
->raw_status_low
))
6425 msg
= status_message (p
);
6427 /* If process is terminated, deactivate it or delete it. */
6429 if (CONSP (p
->status
))
6430 symbol
= XCAR (p
->status
);
6432 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6433 || EQ (symbol
, Qclosed
))
6435 if (delete_exited_processes
)
6436 remove_process (proc
);
6438 deactivate_process (proc
);
6441 /* The actions above may have further incremented p->tick.
6442 So set p->update_tick again
6443 so that an error in the sentinel will not cause
6444 this code to be run again. */
6445 XSETINT (p
->update_tick
, XINT (p
->tick
));
6446 /* Now output the message suitably. */
6447 if (!NILP (p
->sentinel
))
6448 exec_sentinel (proc
, msg
);
6449 /* Don't bother with a message in the buffer
6450 when a process becomes runnable. */
6451 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6453 Lisp_Object ro
, tem
;
6454 struct buffer
*old
= current_buffer
;
6455 int opoint
, opoint_byte
;
6456 int before
, before_byte
;
6458 ro
= XBUFFER (buffer
)->read_only
;
6460 /* Avoid error if buffer is deleted
6461 (probably that's why the process is dead, too) */
6462 if (NILP (XBUFFER (buffer
)->name
))
6464 Fset_buffer (buffer
);
6467 opoint_byte
= PT_BYTE
;
6468 /* Insert new output into buffer
6469 at the current end-of-output marker,
6470 thus preserving logical ordering of input and output. */
6471 if (XMARKER (p
->mark
)->buffer
)
6472 Fgoto_char (p
->mark
);
6474 SET_PT_BOTH (ZV
, ZV_BYTE
);
6477 before_byte
= PT_BYTE
;
6479 tem
= current_buffer
->read_only
;
6480 current_buffer
->read_only
= Qnil
;
6481 insert_string ("\nProcess ");
6482 Finsert (1, &p
->name
);
6483 insert_string (" ");
6485 current_buffer
->read_only
= tem
;
6486 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6488 if (opoint
>= before
)
6489 SET_PT_BOTH (opoint
+ (PT
- before
),
6490 opoint_byte
+ (PT_BYTE
- before_byte
));
6492 SET_PT_BOTH (opoint
, opoint_byte
);
6494 set_buffer_internal (old
);
6499 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6500 redisplay_preserve_echo_area (13);
6506 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6507 Sset_process_coding_system
, 1, 3, 0,
6508 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6509 DECODING will be used to decode subprocess output and ENCODING to
6510 encode subprocess input. */)
6511 (process
, decoding
, encoding
)
6512 register Lisp_Object process
, decoding
, encoding
;
6514 register struct Lisp_Process
*p
;
6516 CHECK_PROCESS (process
);
6517 p
= XPROCESS (process
);
6518 if (XINT (p
->infd
) < 0)
6519 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6520 if (XINT (p
->outfd
) < 0)
6521 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6522 Fcheck_coding_system (decoding
);
6523 Fcheck_coding_system (encoding
);
6525 p
->decode_coding_system
= decoding
;
6526 p
->encode_coding_system
= encoding
;
6527 setup_process_coding_systems (process
);
6532 DEFUN ("process-coding-system",
6533 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6534 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6536 register Lisp_Object process
;
6538 CHECK_PROCESS (process
);
6539 return Fcons (XPROCESS (process
)->decode_coding_system
,
6540 XPROCESS (process
)->encode_coding_system
);
6543 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6544 Sset_process_filter_multibyte
, 2, 2, 0,
6545 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6546 If FLAG is non-nil, the filter is given multibyte strings.
6547 If FLAG is nil, the filter is given unibyte strings. In this case,
6548 all character code conversion except for end-of-line conversion is
6551 Lisp_Object process
, flag
;
6553 register struct Lisp_Process
*p
;
6555 CHECK_PROCESS (process
);
6556 p
= XPROCESS (process
);
6557 p
->filter_multibyte
= flag
;
6558 setup_process_coding_systems (process
);
6563 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6564 Sprocess_filter_multibyte_p
, 1, 1, 0,
6565 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6567 Lisp_Object process
;
6569 register struct Lisp_Process
*p
;
6571 CHECK_PROCESS (process
);
6572 p
= XPROCESS (process
);
6574 return (NILP (p
->filter_multibyte
) ? Qnil
: Qt
);
6579 /* The first time this is called, assume keyboard input comes from DESC
6580 instead of from where we used to expect it.
6581 Subsequent calls mean assume input keyboard can come from DESC
6582 in addition to other places. */
6584 static int add_keyboard_wait_descriptor_called_flag
;
6587 add_keyboard_wait_descriptor (desc
)
6590 if (! add_keyboard_wait_descriptor_called_flag
)
6591 FD_CLR (0, &input_wait_mask
);
6592 add_keyboard_wait_descriptor_called_flag
= 1;
6593 FD_SET (desc
, &input_wait_mask
);
6594 FD_SET (desc
, &non_process_wait_mask
);
6595 if (desc
> max_keyboard_desc
)
6596 max_keyboard_desc
= desc
;
6599 /* From now on, do not expect DESC to give keyboard input. */
6602 delete_keyboard_wait_descriptor (desc
)
6606 int lim
= max_keyboard_desc
;
6608 FD_CLR (desc
, &input_wait_mask
);
6609 FD_CLR (desc
, &non_process_wait_mask
);
6611 if (desc
== max_keyboard_desc
)
6612 for (fd
= 0; fd
< lim
; fd
++)
6613 if (FD_ISSET (fd
, &input_wait_mask
)
6614 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6615 max_keyboard_desc
= fd
;
6618 /* Return nonzero if *MASK has a bit set
6619 that corresponds to one of the keyboard input descriptors. */
6622 keyboard_bit_set (mask
)
6627 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
6628 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6629 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6642 if (! noninteractive
|| initialized
)
6644 signal (SIGCHLD
, sigchld_handler
);
6647 FD_ZERO (&input_wait_mask
);
6648 FD_ZERO (&non_keyboard_wait_mask
);
6649 FD_ZERO (&non_process_wait_mask
);
6650 max_process_desc
= 0;
6652 #ifdef NON_BLOCKING_CONNECT
6653 FD_ZERO (&connect_wait_mask
);
6654 num_pending_connects
= 0;
6657 #ifdef ADAPTIVE_READ_BUFFERING
6658 process_output_delay_count
= 0;
6659 process_output_skip
= 0;
6662 FD_SET (0, &input_wait_mask
);
6664 Vprocess_alist
= Qnil
;
6665 for (i
= 0; i
< MAXDESC
; i
++)
6667 chan_process
[i
] = Qnil
;
6668 proc_buffered_char
[i
] = -1;
6670 bzero (proc_decode_coding_system
, sizeof proc_decode_coding_system
);
6671 bzero (proc_encode_coding_system
, sizeof proc_encode_coding_system
);
6672 #ifdef DATAGRAM_SOCKETS
6673 bzero (datagram_address
, sizeof datagram_address
);
6678 Lisp_Object subfeatures
= Qnil
;
6679 struct socket_options
*sopt
;
6681 #define ADD_SUBFEATURE(key, val) \
6682 subfeatures = Fcons (Fcons (key, Fcons (val, Qnil)), subfeatures)
6684 #ifdef NON_BLOCKING_CONNECT
6685 ADD_SUBFEATURE (QCnowait
, Qt
);
6687 #ifdef DATAGRAM_SOCKETS
6688 ADD_SUBFEATURE (QCtype
, Qdatagram
);
6690 #ifdef HAVE_LOCAL_SOCKETS
6691 ADD_SUBFEATURE (QCfamily
, Qlocal
);
6693 #ifdef HAVE_GETSOCKNAME
6694 ADD_SUBFEATURE (QCservice
, Qt
);
6696 #if !defined(TERM) && (defined(O_NONBLOCK) || defined(O_NDELAY))
6697 ADD_SUBFEATURE (QCserver
, Qt
);
6700 for (sopt
= socket_options
; sopt
->name
; sopt
++)
6701 subfeatures
= Fcons (intern (sopt
->name
), subfeatures
);
6703 Fprovide (intern ("make-network-process"), subfeatures
);
6705 #endif /* HAVE_SOCKETS */
6708 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
6709 processes. As such, we only change the default value. */
6712 char *release
= get_operating_system_release();
6713 if (!release
|| !release
[0] || (release
[0] < MIN_PTY_KERNEL_VERSION
6714 && release
[1] == '.')) {
6715 Vprocess_connection_type
= Qnil
;
6724 Qprocessp
= intern ("processp");
6725 staticpro (&Qprocessp
);
6726 Qrun
= intern ("run");
6728 Qstop
= intern ("stop");
6730 Qsignal
= intern ("signal");
6731 staticpro (&Qsignal
);
6733 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
6736 Qexit = intern ("exit");
6737 staticpro (&Qexit); */
6739 Qopen
= intern ("open");
6741 Qclosed
= intern ("closed");
6742 staticpro (&Qclosed
);
6743 Qconnect
= intern ("connect");
6744 staticpro (&Qconnect
);
6745 Qfailed
= intern ("failed");
6746 staticpro (&Qfailed
);
6747 Qlisten
= intern ("listen");
6748 staticpro (&Qlisten
);
6749 Qlocal
= intern ("local");
6750 staticpro (&Qlocal
);
6751 Qdatagram
= intern ("datagram");
6752 staticpro (&Qdatagram
);
6754 QCname
= intern (":name");
6755 staticpro (&QCname
);
6756 QCbuffer
= intern (":buffer");
6757 staticpro (&QCbuffer
);
6758 QChost
= intern (":host");
6759 staticpro (&QChost
);
6760 QCservice
= intern (":service");
6761 staticpro (&QCservice
);
6762 QCtype
= intern (":type");
6763 staticpro (&QCtype
);
6764 QClocal
= intern (":local");
6765 staticpro (&QClocal
);
6766 QCremote
= intern (":remote");
6767 staticpro (&QCremote
);
6768 QCcoding
= intern (":coding");
6769 staticpro (&QCcoding
);
6770 QCserver
= intern (":server");
6771 staticpro (&QCserver
);
6772 QCnowait
= intern (":nowait");
6773 staticpro (&QCnowait
);
6774 QCsentinel
= intern (":sentinel");
6775 staticpro (&QCsentinel
);
6776 QClog
= intern (":log");
6778 QCnoquery
= intern (":noquery");
6779 staticpro (&QCnoquery
);
6780 QCstop
= intern (":stop");
6781 staticpro (&QCstop
);
6782 QCoptions
= intern (":options");
6783 staticpro (&QCoptions
);
6784 QCplist
= intern (":plist");
6785 staticpro (&QCplist
);
6786 QCfilter_multibyte
= intern (":filter-multibyte");
6787 staticpro (&QCfilter_multibyte
);
6789 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
6790 staticpro (&Qlast_nonmenu_event
);
6792 staticpro (&Vprocess_alist
);
6794 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
6795 doc
: /* *Non-nil means delete processes immediately when they exit.
6796 nil means don't delete them until `list-processes' is run. */);
6798 delete_exited_processes
= 1;
6800 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
6801 doc
: /* Control type of device used to communicate with subprocesses.
6802 Values are nil to use a pipe, or t or `pty' to use a pty.
6803 The value has no effect if the system has no ptys or if all ptys are busy:
6804 then a pipe is used in any case.
6805 The value takes effect when `start-process' is called. */);
6806 Vprocess_connection_type
= Qt
;
6808 #ifdef ADAPTIVE_READ_BUFFERING
6809 DEFVAR_LISP ("process-adaptive-read-buffering", &Vprocess_adaptive_read_buffering
,
6810 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
6811 On some systems, when Emacs reads the output from a subprocess, the output data
6812 is read in very small blocks, potentially resulting in very poor performance.
6813 This behaviour can be remedied to some extent by setting this variable to a
6814 non-nil value, as it will automatically delay reading from such processes, to
6815 allowing them to produce more output before Emacs tries to read it.
6816 If the value is t, the delay is reset after each write to the process; any other
6817 non-nil value means that the delay is not reset on write.
6818 The variable takes effect when `start-process' is called. */);
6819 Vprocess_adaptive_read_buffering
= Qt
;
6822 defsubr (&Sprocessp
);
6823 defsubr (&Sget_process
);
6824 defsubr (&Sget_buffer_process
);
6825 defsubr (&Sdelete_process
);
6826 defsubr (&Sprocess_status
);
6827 defsubr (&Sprocess_exit_status
);
6828 defsubr (&Sprocess_id
);
6829 defsubr (&Sprocess_name
);
6830 defsubr (&Sprocess_tty_name
);
6831 defsubr (&Sprocess_command
);
6832 defsubr (&Sset_process_buffer
);
6833 defsubr (&Sprocess_buffer
);
6834 defsubr (&Sprocess_mark
);
6835 defsubr (&Sset_process_filter
);
6836 defsubr (&Sprocess_filter
);
6837 defsubr (&Sset_process_sentinel
);
6838 defsubr (&Sprocess_sentinel
);
6839 defsubr (&Sset_process_window_size
);
6840 defsubr (&Sset_process_inherit_coding_system_flag
);
6841 defsubr (&Sprocess_inherit_coding_system_flag
);
6842 defsubr (&Sset_process_query_on_exit_flag
);
6843 defsubr (&Sprocess_query_on_exit_flag
);
6844 defsubr (&Sprocess_contact
);
6845 defsubr (&Sprocess_plist
);
6846 defsubr (&Sset_process_plist
);
6847 defsubr (&Slist_processes
);
6848 defsubr (&Sprocess_list
);
6849 defsubr (&Sstart_process
);
6851 defsubr (&Sset_network_process_option
);
6852 defsubr (&Smake_network_process
);
6853 defsubr (&Sformat_network_address
);
6854 #endif /* HAVE_SOCKETS */
6855 #if defined(HAVE_SOCKETS) && defined(HAVE_NET_IF_H) && defined(HAVE_SYS_IOCTL_H)
6857 defsubr (&Snetwork_interface_list
);
6859 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
6860 defsubr (&Snetwork_interface_info
);
6862 #endif /* HAVE_SOCKETS ... */
6863 #ifdef DATAGRAM_SOCKETS
6864 defsubr (&Sprocess_datagram_address
);
6865 defsubr (&Sset_process_datagram_address
);
6867 defsubr (&Saccept_process_output
);
6868 defsubr (&Sprocess_send_region
);
6869 defsubr (&Sprocess_send_string
);
6870 defsubr (&Sinterrupt_process
);
6871 defsubr (&Skill_process
);
6872 defsubr (&Squit_process
);
6873 defsubr (&Sstop_process
);
6874 defsubr (&Scontinue_process
);
6875 defsubr (&Sprocess_running_child_p
);
6876 defsubr (&Sprocess_send_eof
);
6877 defsubr (&Ssignal_process
);
6878 defsubr (&Swaiting_for_user_input_p
);
6879 /* defsubr (&Sprocess_connection); */
6880 defsubr (&Sset_process_coding_system
);
6881 defsubr (&Sprocess_coding_system
);
6882 defsubr (&Sset_process_filter_multibyte
);
6883 defsubr (&Sprocess_filter_multibyte_p
);
6887 #else /* not subprocesses */
6889 #include <sys/types.h>
6893 #include "systime.h"
6894 #include "character.h"
6896 #include "termopts.h"
6897 #include "sysselect.h"
6899 extern int frame_garbaged
;
6901 extern EMACS_TIME
timer_check ();
6902 extern int timers_run
;
6906 /* As described above, except assuming that there are no subprocesses:
6908 Wait for timeout to elapse and/or keyboard input to be available.
6911 timeout in seconds, or
6912 zero for no limit, or
6913 -1 means gobble data immediately available but don't wait for any.
6915 read_kbd is a Lisp_Object:
6916 0 to ignore keyboard input, or
6917 1 to return when input is available, or
6918 -1 means caller will actually read the input, so don't throw to
6921 see full version for other parameters. We know that wait_proc will
6922 always be NULL, since `subprocesses' isn't defined.
6924 do_display != 0 means redisplay should be done to show subprocess
6925 output that arrives.
6927 Return true iff we received input from any process. */
6930 wait_reading_process_output (time_limit
, microsecs
, read_kbd
, do_display
,
6931 wait_for_cell
, wait_proc
, just_wait_proc
)
6932 int time_limit
, microsecs
, read_kbd
, do_display
;
6933 Lisp_Object wait_for_cell
;
6934 struct Lisp_Process
*wait_proc
;
6938 EMACS_TIME end_time
, timeout
;
6939 SELECT_TYPE waitchannels
;
6942 /* What does time_limit really mean? */
6943 if (time_limit
|| microsecs
)
6945 EMACS_GET_TIME (end_time
);
6946 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
6947 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6950 /* Turn off periodic alarms (in case they are in use)
6951 and then turn off any other atimers,
6952 because the select emulator uses alarms. */
6954 turn_on_atimers (0);
6958 int timeout_reduced_for_timers
= 0;
6960 /* If calling from keyboard input, do not quit
6961 since we want to return C-g as an input character.
6962 Otherwise, do pending quit if requested. */
6966 /* Exit now if the cell we're waiting for became non-nil. */
6967 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6970 /* Compute time from now till when time limit is up */
6971 /* Exit if already run out */
6972 if (time_limit
== -1)
6974 /* -1 specified for timeout means
6975 gobble output available now
6976 but don't wait at all. */
6978 EMACS_SET_SECS_USECS (timeout
, 0, 0);
6980 else if (time_limit
|| microsecs
)
6982 EMACS_GET_TIME (timeout
);
6983 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6984 if (EMACS_TIME_NEG_P (timeout
))
6989 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
6992 /* If our caller will not immediately handle keyboard events,
6993 run timer events directly.
6994 (Callers that will immediately read keyboard events
6995 call timer_delay on their own.) */
6996 if (NILP (wait_for_cell
))
6998 EMACS_TIME timer_delay
;
7002 int old_timers_run
= timers_run
;
7003 timer_delay
= timer_check (1);
7004 if (timers_run
!= old_timers_run
&& do_display
)
7005 /* We must retry, since a timer may have requeued itself
7006 and that could alter the time delay. */
7007 redisplay_preserve_echo_area (14);
7011 while (!detect_input_pending ());
7013 /* If there is unread keyboard input, also return. */
7015 && requeued_events_pending_p ())
7018 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
7020 EMACS_TIME difference
;
7021 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
7022 if (EMACS_TIME_NEG_P (difference
))
7024 timeout
= timer_delay
;
7025 timeout_reduced_for_timers
= 1;
7030 /* Cause C-g and alarm signals to take immediate action,
7031 and cause input available signals to zero out timeout. */
7033 set_waiting_for_input (&timeout
);
7035 /* Wait till there is something to do. */
7037 if (! read_kbd
&& NILP (wait_for_cell
))
7038 FD_ZERO (&waitchannels
);
7040 FD_SET (0, &waitchannels
);
7042 /* If a frame has been newly mapped and needs updating,
7043 reprocess its display stuff. */
7044 if (frame_garbaged
&& do_display
)
7046 clear_waiting_for_input ();
7047 redisplay_preserve_echo_area (15);
7049 set_waiting_for_input (&timeout
);
7052 if (read_kbd
&& detect_input_pending ())
7055 FD_ZERO (&waitchannels
);
7058 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
7063 /* Make C-g and alarm signals set flags again */
7064 clear_waiting_for_input ();
7066 /* If we woke up due to SIGWINCH, actually change size now. */
7067 do_pending_window_change (0);
7069 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
7070 /* We waited the full specified time, so return now. */
7075 /* If the system call was interrupted, then go around the
7077 if (xerrno
== EINTR
)
7078 FD_ZERO (&waitchannels
);
7080 error ("select error: %s", emacs_strerror (xerrno
));
7083 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
7084 /* System sometimes fails to deliver SIGIO. */
7085 kill (getpid (), SIGIO
);
7088 if (read_kbd
&& interrupt_input
&& (waitchannels
& 1))
7089 kill (getpid (), SIGIO
);
7092 /* Check for keyboard input */
7095 && detect_input_pending_run_timers (do_display
))
7097 swallow_events (do_display
);
7098 if (detect_input_pending_run_timers (do_display
))
7102 /* If there is unread keyboard input, also return. */
7104 && requeued_events_pending_p ())
7107 /* If wait_for_cell. check for keyboard input
7108 but don't run any timers.
7109 ??? (It seems wrong to me to check for keyboard
7110 input at all when wait_for_cell, but the code
7111 has been this way since July 1994.
7112 Try changing this after version 19.31.) */
7113 if (! NILP (wait_for_cell
)
7114 && detect_input_pending ())
7116 swallow_events (do_display
);
7117 if (detect_input_pending ())
7121 /* Exit now if the cell we're waiting for became non-nil. */
7122 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7132 /* Don't confuse make-docfile by having two doc strings for this function.
7133 make-docfile does not pay attention to #if, for good reason! */
7134 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7137 register Lisp_Object name
;
7142 /* Don't confuse make-docfile by having two doc strings for this function.
7143 make-docfile does not pay attention to #if, for good reason! */
7144 DEFUN ("process-inherit-coding-system-flag",
7145 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7149 register Lisp_Object process
;
7151 /* Ignore the argument and return the value of
7152 inherit-process-coding-system. */
7153 return inherit_process_coding_system
? Qt
: Qnil
;
7156 /* Kill all processes associated with `buffer'.
7157 If `buffer' is nil, kill all processes.
7158 Since we have no subprocesses, this does nothing. */
7161 kill_buffer_processes (buffer
)
7174 QCtype
= intern (":type");
7175 staticpro (&QCtype
);
7177 defsubr (&Sget_buffer_process
);
7178 defsubr (&Sprocess_inherit_coding_system_flag
);
7182 #endif /* not subprocesses */
7184 /* arch-tag: 3706c011-7b9a-4117-bd4f-59e7f701a4c4
7185 (do not change this comment) */