1 /* Asynchronous subprocess control for GNU Emacs.
2 Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995, 1996, 1998, 1999,
3 2001, 2002, 2003, 2004, 2005 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., 51 Franklin Street, Fifth Floor,
20 Boston, MA 02110-1301, 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 have a non-zero read_output_delay,
276 and therefore might be delayed for adaptive read buffering. */
278 static int process_output_delay_count
;
280 /* Non-zero if any process has non-nil read_output_skip. */
282 static int process_output_skip
;
284 /* Non-nil means to delay reading process output to improve buffering.
285 A value of t means that delay is reset after each send, any other
286 non-nil value does not reset the delay. A value of nil disables
287 adaptive read buffering completely. */
288 static Lisp_Object Vprocess_adaptive_read_buffering
;
290 #define process_output_delay_count 0
294 #include "sysselect.h"
296 extern int keyboard_bit_set
P_ ((SELECT_TYPE
*));
298 /* If we support a window system, turn on the code to poll periodically
299 to detect C-g. It isn't actually used when doing interrupt input. */
300 #ifdef HAVE_WINDOW_SYSTEM
301 #define POLL_FOR_INPUT
304 /* Mask of bits indicating the descriptors that we wait for input on. */
306 static SELECT_TYPE input_wait_mask
;
308 /* Mask that excludes keyboard input descriptor (s). */
310 static SELECT_TYPE non_keyboard_wait_mask
;
312 /* Mask that excludes process input descriptor (s). */
314 static SELECT_TYPE non_process_wait_mask
;
316 #ifdef NON_BLOCKING_CONNECT
317 /* Mask of bits indicating the descriptors that we wait for connect to
318 complete on. Once they complete, they are removed from this mask
319 and added to the input_wait_mask and non_keyboard_wait_mask. */
321 static SELECT_TYPE connect_wait_mask
;
323 /* Number of bits set in connect_wait_mask. */
324 static int num_pending_connects
;
326 #define IF_NON_BLOCKING_CONNECT(s) s
328 #define IF_NON_BLOCKING_CONNECT(s)
331 /* The largest descriptor currently in use for a process object. */
332 static int max_process_desc
;
334 /* The largest descriptor currently in use for keyboard input. */
335 static int max_keyboard_desc
;
337 /* Nonzero means delete a process right away if it exits. */
338 static int delete_exited_processes
;
340 /* Indexed by descriptor, gives the process (if any) for that descriptor */
341 Lisp_Object chan_process
[MAXDESC
];
343 /* Alist of elements (NAME . PROCESS) */
344 Lisp_Object Vprocess_alist
;
346 /* Buffered-ahead input char from process, indexed by channel.
347 -1 means empty (no char is buffered).
348 Used on sys V where the only way to tell if there is any
349 output from the process is to read at least one char.
350 Always -1 on systems that support FIONREAD. */
352 /* Don't make static; need to access externally. */
353 int proc_buffered_char
[MAXDESC
];
355 /* Table of `struct coding-system' for each process. */
356 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
357 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
359 #ifdef DATAGRAM_SOCKETS
360 /* Table of `partner address' for datagram sockets. */
361 struct sockaddr_and_len
{
364 } datagram_address
[MAXDESC
];
365 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
366 #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XINT (XPROCESS (proc)->infd)].sa != 0)
368 #define DATAGRAM_CHAN_P(chan) (0)
369 #define DATAGRAM_CONN_P(proc) (0)
372 static Lisp_Object
get_process ();
373 static void exec_sentinel ();
375 extern EMACS_TIME
timer_check ();
376 extern int timers_run
;
378 /* Maximum number of bytes to send to a pty without an eof. */
379 static int pty_max_bytes
;
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
)->buffer
= buffer
;
1542 XPROCESS (proc
)->sentinel
= Qnil
;
1543 XPROCESS (proc
)->filter
= Qnil
;
1544 XPROCESS (proc
)->filter_multibyte
1545 = buffer_defaults
.enable_multibyte_characters
;
1546 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1548 #ifdef ADAPTIVE_READ_BUFFERING
1549 XPROCESS (proc
)->adaptive_read_buffering
= Vprocess_adaptive_read_buffering
;
1552 /* Make the process marker point into the process buffer (if any). */
1554 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1555 BUF_ZV (XBUFFER (buffer
)),
1556 BUF_ZV_BYTE (XBUFFER (buffer
)));
1559 /* Decide coding systems for communicating with the process. Here
1560 we don't setup the structure coding_system nor pay attention to
1561 unibyte mode. They are done in create_process. */
1563 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1564 Lisp_Object coding_systems
= Qt
;
1565 Lisp_Object val
, *args2
;
1566 struct gcpro gcpro1
, gcpro2
;
1568 val
= Vcoding_system_for_read
;
1571 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1572 args2
[0] = Qstart_process
;
1573 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1574 GCPRO2 (proc
, current_dir
);
1575 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1577 if (CONSP (coding_systems
))
1578 val
= XCAR (coding_systems
);
1579 else if (CONSP (Vdefault_process_coding_system
))
1580 val
= XCAR (Vdefault_process_coding_system
);
1582 XPROCESS (proc
)->decode_coding_system
= val
;
1584 val
= Vcoding_system_for_write
;
1587 if (EQ (coding_systems
, Qt
))
1589 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof args2
);
1590 args2
[0] = Qstart_process
;
1591 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1592 GCPRO2 (proc
, current_dir
);
1593 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1596 if (CONSP (coding_systems
))
1597 val
= XCDR (coding_systems
);
1598 else if (CONSP (Vdefault_process_coding_system
))
1599 val
= XCDR (Vdefault_process_coding_system
);
1601 XPROCESS (proc
)->encode_coding_system
= val
;
1605 /* Make a one member argv with all args concatenated
1606 together separated by a blank. */
1607 len
= SBYTES (program
) + 2;
1608 for (i
= 3; i
< nargs
; i
++)
1612 len
+= SBYTES (tem
) + 1; /* count the blank */
1614 new_argv
= (unsigned char *) alloca (len
);
1615 strcpy (new_argv
, SDATA (program
));
1616 for (i
= 3; i
< nargs
; i
++)
1620 strcat (new_argv
, " ");
1621 strcat (new_argv
, SDATA (tem
));
1623 /* Need to add code here to check for program existence on VMS */
1626 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1628 /* If program file name is not absolute, search our path for it.
1629 Put the name we will really use in TEM. */
1630 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1631 && !(SCHARS (program
) > 1
1632 && IS_DEVICE_SEP (SREF (program
, 1))))
1634 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1637 GCPRO4 (name
, program
, buffer
, current_dir
);
1638 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1641 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1642 tem
= Fexpand_file_name (tem
, Qnil
);
1646 if (!NILP (Ffile_directory_p (program
)))
1647 error ("Specified program for new process is a directory");
1651 /* If program file name starts with /: for quoting a magic name,
1653 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1654 && SREF (tem
, 1) == ':')
1655 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1657 /* Encode the file name and put it in NEW_ARGV.
1658 That's where the child will use it to execute the program. */
1659 tem
= ENCODE_FILE (tem
);
1660 new_argv
[0] = SDATA (tem
);
1662 /* Here we encode arguments by the coding system used for sending
1663 data to the process. We don't support using different coding
1664 systems for encoding arguments and for encoding data sent to the
1667 for (i
= 3; i
< nargs
; i
++)
1671 if (STRING_MULTIBYTE (tem
))
1672 tem
= (code_convert_string_norecord
1673 (tem
, XPROCESS (proc
)->encode_coding_system
, 1));
1674 new_argv
[i
- 2] = SDATA (tem
);
1676 new_argv
[i
- 2] = 0;
1677 #endif /* not VMS */
1679 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
1680 XPROCESS (proc
)->decoding_carryover
= make_number (0);
1681 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
1682 XPROCESS (proc
)->encoding_carryover
= make_number (0);
1684 XPROCESS (proc
)->inherit_coding_system_flag
1685 = (NILP (buffer
) || !inherit_process_coding_system
1688 create_process (proc
, (char **) new_argv
, current_dir
);
1690 return unbind_to (count
, proc
);
1693 /* This function is the unwind_protect form for Fstart_process. If
1694 PROC doesn't have its pid set, then we know someone has signaled
1695 an error and the process wasn't started successfully, so we should
1696 remove it from the process list. */
1698 start_process_unwind (proc
)
1701 if (!PROCESSP (proc
))
1704 /* Was PROC started successfully? */
1705 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1706 remove_process (proc
);
1712 create_process_1 (timer
)
1713 struct atimer
*timer
;
1715 /* Nothing to do. */
1719 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1722 /* Mimic blocking of signals on system V, which doesn't really have it. */
1724 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1725 int sigchld_deferred
;
1728 create_process_sigchld ()
1730 signal (SIGCHLD
, create_process_sigchld
);
1732 sigchld_deferred
= 1;
1738 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1740 create_process (process
, new_argv
, current_dir
)
1741 Lisp_Object process
;
1743 Lisp_Object current_dir
;
1745 int pid
, inchannel
, outchannel
;
1747 #ifdef POSIX_SIGNALS
1750 struct sigaction sigint_action
;
1751 struct sigaction sigquit_action
;
1753 struct sigaction sighup_action
;
1755 #else /* !POSIX_SIGNALS */
1758 SIGTYPE (*sigchld
)();
1761 #endif /* !POSIX_SIGNALS */
1762 /* Use volatile to protect variables from being clobbered by longjmp. */
1763 volatile int forkin
, forkout
;
1764 volatile int pty_flag
= 0;
1766 extern char **environ
;
1769 inchannel
= outchannel
= -1;
1772 if (!NILP (Vprocess_connection_type
))
1773 outchannel
= inchannel
= allocate_pty ();
1777 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1778 /* On most USG systems it does not work to open the pty's tty here,
1779 then close it and reopen it in the child. */
1781 /* Don't let this terminal become our controlling terminal
1782 (in case we don't have one). */
1783 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1785 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1788 report_file_error ("Opening pty", Qnil
);
1790 forkin
= forkout
= -1;
1791 #endif /* not USG, or USG_SUBTTY_WORKS */
1795 #endif /* HAVE_PTYS */
1798 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1799 report_file_error ("Opening socketpair", Qnil
);
1800 outchannel
= inchannel
= sv
[0];
1801 forkout
= forkin
= sv
[1];
1803 #else /* not SKTPAIR */
1808 report_file_error ("Creating pipe", Qnil
);
1814 emacs_close (inchannel
);
1815 emacs_close (forkout
);
1816 report_file_error ("Creating pipe", Qnil
);
1821 #endif /* not SKTPAIR */
1824 /* Replaced by close_process_descs */
1825 set_exclusive_use (inchannel
);
1826 set_exclusive_use (outchannel
);
1829 /* Stride people say it's a mystery why this is needed
1830 as well as the O_NDELAY, but that it fails without this. */
1831 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1834 ioctl (inchannel
, FIONBIO
, &one
);
1839 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1840 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1843 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1844 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1848 /* Record this as an active process, with its channels.
1849 As a result, child_setup will close Emacs's side of the pipes. */
1850 chan_process
[inchannel
] = process
;
1851 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1852 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1854 /* Previously we recorded the tty descriptor used in the subprocess.
1855 It was only used for getting the foreground tty process, so now
1856 we just reopen the device (see emacs_get_tty_pgrp) as this is
1857 more portable (see USG_SUBTTY_WORKS above). */
1859 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1860 XPROCESS (process
)->status
= Qrun
;
1861 setup_process_coding_systems (process
);
1863 /* Delay interrupts until we have a chance to store
1864 the new fork's pid in its process structure */
1865 #ifdef POSIX_SIGNALS
1866 sigemptyset (&blocked
);
1868 sigaddset (&blocked
, SIGCHLD
);
1870 #ifdef HAVE_WORKING_VFORK
1871 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1872 this sets the parent's signal handlers as well as the child's.
1873 So delay all interrupts whose handlers the child might munge,
1874 and record the current handlers so they can be restored later. */
1875 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1876 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1878 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1880 #endif /* HAVE_WORKING_VFORK */
1881 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1882 #else /* !POSIX_SIGNALS */
1886 #else /* not BSD4_1 */
1887 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1888 sigsetmask (sigmask (SIGCHLD
));
1889 #else /* ordinary USG */
1891 sigchld_deferred
= 0;
1892 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1894 #endif /* ordinary USG */
1895 #endif /* not BSD4_1 */
1896 #endif /* SIGCHLD */
1897 #endif /* !POSIX_SIGNALS */
1899 FD_SET (inchannel
, &input_wait_mask
);
1900 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1901 if (inchannel
> max_process_desc
)
1902 max_process_desc
= inchannel
;
1904 /* Until we store the proper pid, enable sigchld_handler
1905 to recognize an unknown pid as standing for this process.
1906 It is very important not to let this `marker' value stay
1907 in the table after this function has returned; if it does
1908 it might cause call-process to hang and subsequent asynchronous
1909 processes to get their return values scrambled. */
1910 XSETINT (XPROCESS (process
)->pid
, -1);
1915 /* child_setup must clobber environ on systems with true vfork.
1916 Protect it from permanent change. */
1917 char **save_environ
= environ
;
1919 current_dir
= ENCODE_FILE (current_dir
);
1924 #endif /* not WINDOWSNT */
1926 int xforkin
= forkin
;
1927 int xforkout
= forkout
;
1929 #if 0 /* This was probably a mistake--it duplicates code later on,
1930 but fails to handle all the cases. */
1931 /* Make sure SIGCHLD is not blocked in the child. */
1932 sigsetmask (SIGEMPTYMASK
);
1935 /* Make the pty be the controlling terminal of the process. */
1937 /* First, disconnect its current controlling terminal. */
1939 /* We tried doing setsid only if pty_flag, but it caused
1940 process_set_signal to fail on SGI when using a pipe. */
1942 /* Make the pty's terminal the controlling terminal. */
1946 /* We ignore the return value
1947 because faith@cs.unc.edu says that is necessary on Linux. */
1948 ioctl (xforkin
, TIOCSCTTY
, 0);
1951 #else /* not HAVE_SETSID */
1953 /* It's very important to call setpgrp here and no time
1954 afterwards. Otherwise, we lose our controlling tty which
1955 is set when we open the pty. */
1958 #endif /* not HAVE_SETSID */
1959 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1960 if (pty_flag
&& xforkin
>= 0)
1963 tcgetattr (xforkin
, &t
);
1965 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1966 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1969 #if defined (NTTYDISC) && defined (TIOCSETD)
1970 if (pty_flag
&& xforkin
>= 0)
1972 /* Use new line discipline. */
1973 int ldisc
= NTTYDISC
;
1974 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1979 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1980 can do TIOCSPGRP only to the process's controlling tty. */
1983 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1984 I can't test it since I don't have 4.3. */
1985 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1986 ioctl (j
, TIOCNOTTY
, 0);
1989 /* In order to get a controlling terminal on some versions
1990 of BSD, it is necessary to put the process in pgrp 0
1991 before it opens the terminal. */
1999 #endif /* TIOCNOTTY */
2001 #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY)
2002 /*** There is a suggestion that this ought to be a
2003 conditional on TIOCSPGRP,
2004 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
2005 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
2006 that system does seem to need this code, even though
2007 both HAVE_SETSID and TIOCSCTTY are defined. */
2008 /* Now close the pty (if we had it open) and reopen it.
2009 This makes the pty the controlling terminal of the subprocess. */
2012 #ifdef SET_CHILD_PTY_PGRP
2013 int pgrp
= getpid ();
2016 /* I wonder if emacs_close (emacs_open (pty_name, ...))
2019 emacs_close (xforkin
);
2020 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
2024 emacs_write (1, "Couldn't open the pty terminal ", 31);
2025 emacs_write (1, pty_name
, strlen (pty_name
));
2026 emacs_write (1, "\n", 1);
2030 #ifdef SET_CHILD_PTY_PGRP
2031 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
2032 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
2035 #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */
2037 #ifdef SETUP_SLAVE_PTY
2042 #endif /* SETUP_SLAVE_PTY */
2044 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
2045 Now reenable it in the child, so it will die when we want it to. */
2047 signal (SIGHUP
, SIG_DFL
);
2049 #endif /* HAVE_PTYS */
2051 signal (SIGINT
, SIG_DFL
);
2052 signal (SIGQUIT
, SIG_DFL
);
2054 /* Stop blocking signals in the child. */
2055 #ifdef POSIX_SIGNALS
2056 sigprocmask (SIG_SETMASK
, &procmask
, 0);
2057 #else /* !POSIX_SIGNALS */
2061 #else /* not BSD4_1 */
2062 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
2063 sigsetmask (SIGEMPTYMASK
);
2064 #else /* ordinary USG */
2066 signal (SIGCHLD
, sigchld
);
2068 #endif /* ordinary USG */
2069 #endif /* not BSD4_1 */
2070 #endif /* SIGCHLD */
2071 #endif /* !POSIX_SIGNALS */
2074 child_setup_tty (xforkout
);
2076 pid
= child_setup (xforkin
, xforkout
, xforkout
,
2077 new_argv
, 1, current_dir
);
2078 #else /* not WINDOWSNT */
2079 child_setup (xforkin
, xforkout
, xforkout
,
2080 new_argv
, 1, current_dir
);
2081 #endif /* not WINDOWSNT */
2083 environ
= save_environ
;
2088 /* This runs in the Emacs process. */
2092 emacs_close (forkin
);
2093 if (forkin
!= forkout
&& forkout
>= 0)
2094 emacs_close (forkout
);
2098 /* vfork succeeded. */
2099 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
2102 register_child (pid
, inchannel
);
2103 #endif /* WINDOWSNT */
2105 /* If the subfork execv fails, and it exits,
2106 this close hangs. I don't know why.
2107 So have an interrupt jar it loose. */
2109 struct atimer
*timer
;
2113 EMACS_SET_SECS_USECS (offset
, 1, 0);
2114 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
2117 emacs_close (forkin
);
2119 cancel_atimer (timer
);
2123 if (forkin
!= forkout
&& forkout
>= 0)
2124 emacs_close (forkout
);
2128 XPROCESS (process
)->tty_name
= build_string (pty_name
);
2131 XPROCESS (process
)->tty_name
= Qnil
;
2134 /* Restore the signal state whether vfork succeeded or not.
2135 (We will signal an error, below, if it failed.) */
2136 #ifdef POSIX_SIGNALS
2137 #ifdef HAVE_WORKING_VFORK
2138 /* Restore the parent's signal handlers. */
2139 sigaction (SIGINT
, &sigint_action
, 0);
2140 sigaction (SIGQUIT
, &sigquit_action
, 0);
2142 sigaction (SIGHUP
, &sighup_action
, 0);
2144 #endif /* HAVE_WORKING_VFORK */
2145 /* Stop blocking signals in the parent. */
2146 sigprocmask (SIG_SETMASK
, &procmask
, 0);
2147 #else /* !POSIX_SIGNALS */
2151 #else /* not BSD4_1 */
2152 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
2153 sigsetmask (SIGEMPTYMASK
);
2154 #else /* ordinary USG */
2156 signal (SIGCHLD
, sigchld
);
2157 /* Now really handle any of these signals
2158 that came in during this function. */
2159 if (sigchld_deferred
)
2160 kill (getpid (), SIGCHLD
);
2162 #endif /* ordinary USG */
2163 #endif /* not BSD4_1 */
2164 #endif /* SIGCHLD */
2165 #endif /* !POSIX_SIGNALS */
2167 /* Now generate the error if vfork failed. */
2169 report_file_error ("Doing vfork", Qnil
);
2171 #endif /* not VMS */
2176 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2177 The address family of sa is not included in the result. */
2180 conv_sockaddr_to_lisp (sa
, len
)
2181 struct sockaddr
*sa
;
2184 Lisp_Object address
;
2187 register struct Lisp_Vector
*p
;
2189 switch (sa
->sa_family
)
2193 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2194 len
= sizeof (sin
->sin_addr
) + 1;
2195 address
= Fmake_vector (make_number (len
), Qnil
);
2196 p
= XVECTOR (address
);
2197 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2198 cp
= (unsigned char *)&sin
->sin_addr
;
2201 #ifdef HAVE_LOCAL_SOCKETS
2204 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2205 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2206 if (sockun
->sun_path
[i
] == 0)
2208 return make_unibyte_string (sockun
->sun_path
, i
);
2212 len
-= sizeof (sa
->sa_family
);
2213 address
= Fcons (make_number (sa
->sa_family
),
2214 Fmake_vector (make_number (len
), Qnil
));
2215 p
= XVECTOR (XCDR (address
));
2216 cp
= (unsigned char *) sa
+ sizeof (sa
->sa_family
);
2222 p
->contents
[i
++] = make_number (*cp
++);
2228 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2231 get_lisp_to_sockaddr_size (address
, familyp
)
2232 Lisp_Object address
;
2235 register struct Lisp_Vector
*p
;
2237 if (VECTORP (address
))
2239 p
= XVECTOR (address
);
2243 return sizeof (struct sockaddr_in
);
2246 #ifdef HAVE_LOCAL_SOCKETS
2247 else if (STRINGP (address
))
2249 *familyp
= AF_LOCAL
;
2250 return sizeof (struct sockaddr_un
);
2253 else if (CONSP (address
) && INTEGERP (XCAR (address
)) && VECTORP (XCDR (address
)))
2255 struct sockaddr
*sa
;
2256 *familyp
= XINT (XCAR (address
));
2257 p
= XVECTOR (XCDR (address
));
2258 return p
->size
+ sizeof (sa
->sa_family
);
2263 /* Convert an address object (vector or string) to an internal sockaddr.
2264 Format of address has already been validated by size_lisp_to_sockaddr. */
2267 conv_lisp_to_sockaddr (family
, address
, sa
, len
)
2269 Lisp_Object address
;
2270 struct sockaddr
*sa
;
2273 register struct Lisp_Vector
*p
;
2274 register unsigned char *cp
= NULL
;
2278 sa
->sa_family
= family
;
2280 if (VECTORP (address
))
2282 p
= XVECTOR (address
);
2283 if (family
== AF_INET
)
2285 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2286 len
= sizeof (sin
->sin_addr
) + 1;
2287 i
= XINT (p
->contents
[--len
]);
2288 sin
->sin_port
= htons (i
);
2289 cp
= (unsigned char *)&sin
->sin_addr
;
2292 else if (STRINGP (address
))
2294 #ifdef HAVE_LOCAL_SOCKETS
2295 if (family
== AF_LOCAL
)
2297 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2298 cp
= SDATA (address
);
2299 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2300 sockun
->sun_path
[i
] = *cp
++;
2307 p
= XVECTOR (XCDR (address
));
2308 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2311 for (i
= 0; i
< len
; i
++)
2312 if (INTEGERP (p
->contents
[i
]))
2313 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2316 #ifdef DATAGRAM_SOCKETS
2317 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2319 doc
: /* Get the current datagram address associated with PROCESS. */)
2321 Lisp_Object process
;
2325 CHECK_PROCESS (process
);
2327 if (!DATAGRAM_CONN_P (process
))
2330 channel
= XINT (XPROCESS (process
)->infd
);
2331 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2332 datagram_address
[channel
].len
);
2335 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2337 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2338 Returns nil upon error setting address, ADDRESS otherwise. */)
2340 Lisp_Object process
, address
;
2345 CHECK_PROCESS (process
);
2347 if (!DATAGRAM_CONN_P (process
))
2350 channel
= XINT (XPROCESS (process
)->infd
);
2352 len
= get_lisp_to_sockaddr_size (address
, &family
);
2353 if (datagram_address
[channel
].len
!= len
)
2355 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2361 static struct socket_options
{
2362 /* The name of this option. Should be lowercase version of option
2363 name without SO_ prefix. */
2365 /* Option level SOL_... */
2367 /* Option number SO_... */
2369 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2370 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2371 } socket_options
[] =
2373 #ifdef SO_BINDTODEVICE
2374 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2377 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2380 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2383 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2386 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2389 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2392 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2395 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2397 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2400 /* Set option OPT to value VAL on socket S.
2402 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2403 Signals an error if setting a known option fails.
2407 set_socket_option (s
, opt
, val
)
2409 Lisp_Object opt
, val
;
2412 struct socket_options
*sopt
;
2417 name
= (char *) SDATA (SYMBOL_NAME (opt
));
2418 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2419 if (strcmp (name
, sopt
->name
) == 0)
2422 switch (sopt
->opttype
)
2427 optval
= NILP (val
) ? 0 : 1;
2428 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2429 &optval
, sizeof (optval
));
2437 optval
= XINT (val
);
2439 error ("Bad option value for %s", name
);
2440 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2441 &optval
, sizeof (optval
));
2445 #ifdef SO_BINDTODEVICE
2448 char devname
[IFNAMSIZ
+1];
2450 /* This is broken, at least in the Linux 2.4 kernel.
2451 To unbind, the arg must be a zero integer, not the empty string.
2452 This should work on all systems. KFS. 2003-09-23. */
2453 bzero (devname
, sizeof devname
);
2456 char *arg
= (char *) SDATA (val
);
2457 int len
= min (strlen (arg
), IFNAMSIZ
);
2458 bcopy (arg
, devname
, len
);
2460 else if (!NILP (val
))
2461 error ("Bad option value for %s", name
);
2462 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2471 struct linger linger
;
2474 linger
.l_linger
= 0;
2476 linger
.l_linger
= XINT (val
);
2478 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2479 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2480 &linger
, sizeof (linger
));
2490 report_file_error ("Cannot set network option",
2491 Fcons (opt
, Fcons (val
, Qnil
)));
2492 return (1 << sopt
->optbit
);
2496 DEFUN ("set-network-process-option",
2497 Fset_network_process_option
, Sset_network_process_option
,
2499 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2500 See `make-network-process' for a list of options and values.
2501 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2502 OPTION is not a supported option, return nil instead; otherwise return t. */)
2503 (process
, option
, value
, no_error
)
2504 Lisp_Object process
, option
, value
;
2505 Lisp_Object no_error
;
2508 struct Lisp_Process
*p
;
2510 CHECK_PROCESS (process
);
2511 p
= XPROCESS (process
);
2512 if (!NETCONN1_P (p
))
2513 error ("Process is not a network process");
2517 error ("Process is not running");
2519 if (set_socket_option (s
, option
, value
))
2521 p
->childp
= Fplist_put (p
->childp
, option
, value
);
2525 if (NILP (no_error
))
2526 error ("Unknown or unsupported option");
2532 /* A version of request_sigio suitable for a record_unwind_protect. */
2535 unwind_request_sigio (dummy
)
2538 if (interrupt_input
)
2543 /* Create a network stream/datagram client/server process. Treated
2544 exactly like a normal process when reading and writing. Primary
2545 differences are in status display and process deletion. A network
2546 connection has no PID; you cannot signal it. All you can do is
2547 stop/continue it and deactivate/close it via delete-process */
2549 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2551 doc
: /* Create and return a network server or client process.
2553 In Emacs, network connections are represented by process objects, so
2554 input and output work as for subprocesses and `delete-process' closes
2555 a network connection. However, a network process has no process id,
2556 it cannot be signaled, and the status codes are different from normal
2559 Arguments are specified as keyword/argument pairs. The following
2560 arguments are defined:
2562 :name NAME -- NAME is name for process. It is modified if necessary
2565 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2566 with the process. Process output goes at end of that buffer, unless
2567 you specify an output stream or filter function to handle the output.
2568 BUFFER may be also nil, meaning that this process is not associated
2571 :host HOST -- HOST is name of the host to connect to, or its IP
2572 address. The symbol `local' specifies the local host. If specified
2573 for a server process, it must be a valid name or address for the local
2574 host, and only clients connecting to that address will be accepted.
2576 :service SERVICE -- SERVICE is name of the service desired, or an
2577 integer specifying a port number to connect to. If SERVICE is t,
2578 a random port number is selected for the server.
2580 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2581 stream type connection, `datagram' creates a datagram type connection.
2583 :family FAMILY -- FAMILY is the address (and protocol) family for the
2584 service specified by HOST and SERVICE. The default address family is
2585 Inet (or IPv4) for the host and port number specified by HOST and
2586 SERVICE. Other address families supported are:
2587 local -- for a local (i.e. UNIX) address specified by SERVICE.
2589 :local ADDRESS -- ADDRESS is the local address used for the connection.
2590 This parameter is ignored when opening a client process. When specified
2591 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2593 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2594 connection. This parameter is ignored when opening a stream server
2595 process. For a datagram server process, it specifies the initial
2596 setting of the remote datagram address. When specified for a client
2597 process, the FAMILY, HOST, and SERVICE args are ignored.
2599 The format of ADDRESS depends on the address family:
2600 - An IPv4 address is represented as an vector of integers [A B C D P]
2601 corresponding to numeric IP address A.B.C.D and port number P.
2602 - A local address is represented as a string with the address in the
2603 local address space.
2604 - An "unsupported family" address is represented by a cons (F . AV)
2605 where F is the family number and AV is a vector containing the socket
2606 address data with one element per address data byte. Do not rely on
2607 this format in portable code, as it may depend on implementation
2608 defined constants, data sizes, and data structure alignment.
2610 :coding CODING -- If CODING is a symbol, it specifies the coding
2611 system used for both reading and writing for this process. If CODING
2612 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2613 ENCODING is used for writing.
2615 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2616 return without waiting for the connection to complete; instead, the
2617 sentinel function will be called with second arg matching "open" (if
2618 successful) or "failed" when the connect completes. Default is to use
2619 a blocking connect (i.e. wait) for stream type connections.
2621 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2622 running when Emacs is exited.
2624 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2625 In the stopped state, a server process does not accept new
2626 connections, and a client process does not handle incoming traffic.
2627 The stopped state is cleared by `continue-process' and set by
2630 :filter FILTER -- Install FILTER as the process filter.
2632 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2633 process filter are multibyte, otherwise they are unibyte.
2634 If this keyword is not specified, the strings are multibyte iff
2635 `default-enable-multibyte-characters' is non-nil.
2637 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2639 :log LOG -- Install LOG as the server process log function. This
2640 function is called when the server accepts a network connection from a
2641 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2642 is the server process, CLIENT is the new process for the connection,
2643 and MESSAGE is a string.
2645 :plist PLIST -- Install PLIST as the new process' initial plist.
2647 :server QLEN -- if QLEN is non-nil, create a server process for the
2648 specified FAMILY, SERVICE, and connection type (stream or datagram).
2649 If QLEN is an integer, it is used as the max. length of the server's
2650 pending connection queue (also known as the backlog); the default
2651 queue length is 5. Default is to create a client process.
2653 The following network options can be specified for this connection:
2655 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2656 :dontroute BOOL -- Only send to directly connected hosts.
2657 :keepalive BOOL -- Send keep-alive messages on network stream.
2658 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2659 :oobinline BOOL -- Place out-of-band data in receive data stream.
2660 :priority INT -- Set protocol defined priority for sent packets.
2661 :reuseaddr BOOL -- Allow reusing a recently used local address
2662 (this is allowed by default for a server process).
2663 :bindtodevice NAME -- bind to interface NAME. Using this may require
2664 special privileges on some systems.
2666 Consult the relevant system programmer's manual pages for more
2667 information on using these options.
2670 A server process will listen for and accept connections from clients.
2671 When a client connection is accepted, a new network process is created
2672 for the connection with the following parameters:
2674 - The client's process name is constructed by concatenating the server
2675 process' NAME and a client identification string.
2676 - If the FILTER argument is non-nil, the client process will not get a
2677 separate process buffer; otherwise, the client's process buffer is a newly
2678 created buffer named after the server process' BUFFER name or process
2679 NAME concatenated with the client identification string.
2680 - The connection type and the process filter and sentinel parameters are
2681 inherited from the server process' TYPE, FILTER and SENTINEL.
2682 - The client process' contact info is set according to the client's
2683 addressing information (typically an IP address and a port number).
2684 - The client process' plist is initialized from the server's plist.
2686 Notice that the FILTER and SENTINEL args are never used directly by
2687 the server process. Also, the BUFFER argument is not used directly by
2688 the server process, but via the optional :log function, accepted (and
2689 failed) connections may be logged in the server process' buffer.
2691 The original argument list, modified with the actual connection
2692 information, is available via the `process-contact' function.
2694 usage: (make-network-process &rest ARGS) */)
2700 Lisp_Object contact
;
2701 struct Lisp_Process
*p
;
2702 #ifdef HAVE_GETADDRINFO
2703 struct addrinfo ai
, *res
, *lres
;
2704 struct addrinfo hints
;
2705 char *portstring
, portbuf
[128];
2706 #else /* HAVE_GETADDRINFO */
2707 struct _emacs_addrinfo
2713 struct sockaddr
*ai_addr
;
2714 struct _emacs_addrinfo
*ai_next
;
2716 #endif /* HAVE_GETADDRINFO */
2717 struct sockaddr_in address_in
;
2718 #ifdef HAVE_LOCAL_SOCKETS
2719 struct sockaddr_un address_un
;
2724 int s
= -1, outch
, inch
;
2725 struct gcpro gcpro1
;
2726 int count
= SPECPDL_INDEX ();
2728 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2730 Lisp_Object name
, buffer
, host
, service
, address
;
2731 Lisp_Object filter
, sentinel
;
2732 int is_non_blocking_client
= 0;
2733 int is_server
= 0, backlog
= 5;
2740 /* Save arguments for process-contact and clone-process. */
2741 contact
= Flist (nargs
, args
);
2745 /* Ensure socket support is loaded if available. */
2746 init_winsock (TRUE
);
2749 /* :type TYPE (nil: stream, datagram */
2750 tem
= Fplist_get (contact
, QCtype
);
2752 socktype
= SOCK_STREAM
;
2753 #ifdef DATAGRAM_SOCKETS
2754 else if (EQ (tem
, Qdatagram
))
2755 socktype
= SOCK_DGRAM
;
2758 error ("Unsupported connection type");
2761 tem
= Fplist_get (contact
, QCserver
);
2764 /* Don't support network sockets when non-blocking mode is
2765 not available, since a blocked Emacs is not useful. */
2766 #if defined(TERM) || (!defined(O_NONBLOCK) && !defined(O_NDELAY))
2767 error ("Network servers not supported");
2771 backlog
= XINT (tem
);
2775 /* Make QCaddress an alias for :local (server) or :remote (client). */
2776 QCaddress
= is_server
? QClocal
: QCremote
;
2779 if (!is_server
&& socktype
== SOCK_STREAM
2780 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2782 #ifndef NON_BLOCKING_CONNECT
2783 error ("Non-blocking connect not supported");
2785 is_non_blocking_client
= 1;
2789 name
= Fplist_get (contact
, QCname
);
2790 buffer
= Fplist_get (contact
, QCbuffer
);
2791 filter
= Fplist_get (contact
, QCfilter
);
2792 sentinel
= Fplist_get (contact
, QCsentinel
);
2794 CHECK_STRING (name
);
2797 /* Let's handle TERM before things get complicated ... */
2798 host
= Fplist_get (contact
, QChost
);
2799 CHECK_STRING (host
);
2801 service
= Fplist_get (contact
, QCservice
);
2802 if (INTEGERP (service
))
2803 port
= htons ((unsigned short) XINT (service
));
2806 struct servent
*svc_info
;
2807 CHECK_STRING (service
);
2808 svc_info
= getservbyname (SDATA (service
), "tcp");
2810 error ("Unknown service: %s", SDATA (service
));
2811 port
= svc_info
->s_port
;
2814 s
= connect_server (0);
2816 report_file_error ("error creating socket", Fcons (name
, Qnil
));
2817 send_command (s
, C_PORT
, 0, "%s:%d", SDATA (host
), ntohs (port
));
2818 send_command (s
, C_DUMB
, 1, 0);
2820 #else /* not TERM */
2822 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2823 ai
.ai_socktype
= socktype
;
2828 /* :local ADDRESS or :remote ADDRESS */
2829 address
= Fplist_get (contact
, QCaddress
);
2830 if (!NILP (address
))
2832 host
= service
= Qnil
;
2834 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
2835 error ("Malformed :address");
2836 ai
.ai_family
= family
;
2837 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
2838 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
2842 /* :family FAMILY -- nil (for Inet), local, or integer. */
2843 tem
= Fplist_get (contact
, QCfamily
);
2845 family
= XINT (tem
);
2850 #ifdef HAVE_LOCAL_SOCKETS
2851 else if (EQ (tem
, Qlocal
))
2856 error ("Unknown address family");
2857 ai
.ai_family
= family
;
2859 /* :service SERVICE -- string, integer (port number), or t (random port). */
2860 service
= Fplist_get (contact
, QCservice
);
2862 #ifdef HAVE_LOCAL_SOCKETS
2863 if (family
== AF_LOCAL
)
2865 /* Host is not used. */
2867 CHECK_STRING (service
);
2868 bzero (&address_un
, sizeof address_un
);
2869 address_un
.sun_family
= AF_LOCAL
;
2870 strncpy (address_un
.sun_path
, SDATA (service
), sizeof address_un
.sun_path
);
2871 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
2872 ai
.ai_addrlen
= sizeof address_un
;
2877 /* :host HOST -- hostname, ip address, or 'local for localhost. */
2878 host
= Fplist_get (contact
, QChost
);
2881 if (EQ (host
, Qlocal
))
2882 host
= build_string ("localhost");
2883 CHECK_STRING (host
);
2886 /* Slow down polling to every ten seconds.
2887 Some kernels have a bug which causes retrying connect to fail
2888 after a connect. Polling can interfere with gethostbyname too. */
2889 #ifdef POLL_FOR_INPUT
2890 if (socktype
== SOCK_STREAM
)
2892 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
2893 bind_polling_period (10);
2897 #ifdef HAVE_GETADDRINFO
2898 /* If we have a host, use getaddrinfo to resolve both host and service.
2899 Otherwise, use getservbyname to lookup the service. */
2903 /* SERVICE can either be a string or int.
2904 Convert to a C string for later use by getaddrinfo. */
2905 if (EQ (service
, Qt
))
2907 else if (INTEGERP (service
))
2909 sprintf (portbuf
, "%ld", (long) XINT (service
));
2910 portstring
= portbuf
;
2914 CHECK_STRING (service
);
2915 portstring
= SDATA (service
);
2920 memset (&hints
, 0, sizeof (hints
));
2922 hints
.ai_family
= NILP (Fplist_member (contact
, QCfamily
)) ? AF_UNSPEC
: family
;
2923 hints
.ai_socktype
= socktype
;
2924 hints
.ai_protocol
= 0;
2925 ret
= getaddrinfo (SDATA (host
), portstring
, &hints
, &res
);
2927 #ifdef HAVE_GAI_STRERROR
2928 error ("%s/%s %s", SDATA (host
), portstring
, gai_strerror(ret
));
2930 error ("%s/%s getaddrinfo error %d", SDATA (host
), portstring
, ret
);
2936 #endif /* HAVE_GETADDRINFO */
2938 /* We end up here if getaddrinfo is not defined, or in case no hostname
2939 has been specified (e.g. for a local server process). */
2941 if (EQ (service
, Qt
))
2943 else if (INTEGERP (service
))
2944 port
= htons ((unsigned short) XINT (service
));
2947 struct servent
*svc_info
;
2948 CHECK_STRING (service
);
2949 svc_info
= getservbyname (SDATA (service
),
2950 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
2952 error ("Unknown service: %s", SDATA (service
));
2953 port
= svc_info
->s_port
;
2956 bzero (&address_in
, sizeof address_in
);
2957 address_in
.sin_family
= family
;
2958 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
2959 address_in
.sin_port
= port
;
2961 #ifndef HAVE_GETADDRINFO
2964 struct hostent
*host_info_ptr
;
2966 /* gethostbyname may fail with TRY_AGAIN, but we don't honour that,
2967 as it may `hang' Emacs for a very long time. */
2970 host_info_ptr
= gethostbyname (SDATA (host
));
2975 bcopy (host_info_ptr
->h_addr
, (char *) &address_in
.sin_addr
,
2976 host_info_ptr
->h_length
);
2977 family
= host_info_ptr
->h_addrtype
;
2978 address_in
.sin_family
= family
;
2981 /* Attempt to interpret host as numeric inet address */
2983 IN_ADDR numeric_addr
;
2984 numeric_addr
= inet_addr ((char *) SDATA (host
));
2985 if (NUMERIC_ADDR_ERROR
)
2986 error ("Unknown host \"%s\"", SDATA (host
));
2988 bcopy ((char *)&numeric_addr
, (char *) &address_in
.sin_addr
,
2989 sizeof (address_in
.sin_addr
));
2993 #endif /* not HAVE_GETADDRINFO */
2995 ai
.ai_family
= family
;
2996 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
2997 ai
.ai_addrlen
= sizeof address_in
;
3001 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
3002 when connect is interrupted. So let's not let it get interrupted.
3003 Note we do not turn off polling, because polling is only used
3004 when not interrupt_input, and thus not normally used on the systems
3005 which have this bug. On systems which use polling, there's no way
3006 to quit if polling is turned off. */
3008 && !is_server
&& socktype
== SOCK_STREAM
)
3010 /* Comment from KFS: The original open-network-stream code
3011 didn't unwind protect this, but it seems like the proper
3012 thing to do. In any case, I don't see how it could harm to
3013 do this -- and it makes cleanup (using unbind_to) easier. */
3014 record_unwind_protect (unwind_request_sigio
, Qnil
);
3018 /* Do this in case we never enter the for-loop below. */
3019 count1
= SPECPDL_INDEX ();
3022 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3028 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3035 #ifdef DATAGRAM_SOCKETS
3036 if (!is_server
&& socktype
== SOCK_DGRAM
)
3038 #endif /* DATAGRAM_SOCKETS */
3040 #ifdef NON_BLOCKING_CONNECT
3041 if (is_non_blocking_client
)
3044 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3046 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3058 /* Make us close S if quit. */
3059 record_unwind_protect (close_file_unwind
, make_number (s
));
3061 /* Parse network options in the arg list.
3062 We simply ignore anything which isn't a known option (including other keywords).
3063 An error is signalled if setting a known option fails. */
3064 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3065 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3069 /* Configure as a server socket. */
3071 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3072 explicit :reuseaddr key to override this. */
3073 #ifdef HAVE_LOCAL_SOCKETS
3074 if (family
!= AF_LOCAL
)
3076 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3079 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3080 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3083 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3084 report_file_error ("Cannot bind server socket", Qnil
);
3086 #ifdef HAVE_GETSOCKNAME
3087 if (EQ (service
, Qt
))
3089 struct sockaddr_in sa1
;
3090 int len1
= sizeof (sa1
);
3091 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3093 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3094 service
= make_number (ntohs (sa1
.sin_port
));
3095 contact
= Fplist_put (contact
, QCservice
, service
);
3100 if (socktype
== SOCK_STREAM
&& listen (s
, backlog
))
3101 report_file_error ("Cannot listen on server socket", Qnil
);
3109 /* This turns off all alarm-based interrupts; the
3110 bind_polling_period call above doesn't always turn all the
3111 short-interval ones off, especially if interrupt_input is
3114 It'd be nice to be able to control the connect timeout
3115 though. Would non-blocking connect calls be portable?
3117 This used to be conditioned by HAVE_GETADDRINFO. Why? */
3119 turn_on_atimers (0);
3121 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3124 turn_on_atimers (1);
3126 if (ret
== 0 || xerrno
== EISCONN
)
3128 /* The unwind-protect will be discarded afterwards.
3129 Likewise for immediate_quit. */
3133 #ifdef NON_BLOCKING_CONNECT
3135 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3139 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3147 /* Discard the unwind protect closing S. */
3148 specpdl_ptr
= specpdl
+ count1
;
3152 if (xerrno
== EINTR
)
3158 #ifdef DATAGRAM_SOCKETS
3159 if (socktype
== SOCK_DGRAM
)
3161 if (datagram_address
[s
].sa
)
3163 datagram_address
[s
].sa
= (struct sockaddr
*) xmalloc (lres
->ai_addrlen
);
3164 datagram_address
[s
].len
= lres
->ai_addrlen
;
3168 bzero (datagram_address
[s
].sa
, lres
->ai_addrlen
);
3169 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3172 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3173 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3174 conv_lisp_to_sockaddr (rfamily
, remote
,
3175 datagram_address
[s
].sa
, rlen
);
3179 bcopy (lres
->ai_addr
, datagram_address
[s
].sa
, lres
->ai_addrlen
);
3182 contact
= Fplist_put (contact
, QCaddress
,
3183 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3184 #ifdef HAVE_GETSOCKNAME
3187 struct sockaddr_in sa1
;
3188 int len1
= sizeof (sa1
);
3189 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3190 contact
= Fplist_put (contact
, QClocal
,
3191 conv_sockaddr_to_lisp (&sa1
, len1
));
3196 #ifdef HAVE_GETADDRINFO
3203 /* Discard the unwind protect for closing S, if any. */
3204 specpdl_ptr
= specpdl
+ count1
;
3206 /* Unwind bind_polling_period and request_sigio. */
3207 unbind_to (count
, Qnil
);
3211 /* If non-blocking got this far - and failed - assume non-blocking is
3212 not supported after all. This is probably a wrong assumption, but
3213 the normal blocking calls to open-network-stream handles this error
3215 if (is_non_blocking_client
)
3220 report_file_error ("make server process failed", contact
);
3222 report_file_error ("make client process failed", contact
);
3225 #endif /* not TERM */
3231 buffer
= Fget_buffer_create (buffer
);
3232 proc
= make_process (name
);
3234 chan_process
[inch
] = proc
;
3237 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3240 fcntl (inch
, F_SETFL
, O_NDELAY
);
3244 p
= XPROCESS (proc
);
3246 p
->childp
= contact
;
3247 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
3250 p
->sentinel
= sentinel
;
3252 p
->filter_multibyte
= buffer_defaults
.enable_multibyte_characters
;
3253 /* Override the above only if :filter-multibyte is specified. */
3254 if (! NILP (Fplist_member (contact
, QCfilter_multibyte
)))
3255 p
->filter_multibyte
= Fplist_get (contact
, QCfilter_multibyte
);
3256 p
->log
= Fplist_get (contact
, QClog
);
3257 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3258 p
->kill_without_query
= Qt
;
3259 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3262 XSETINT (p
->infd
, inch
);
3263 XSETINT (p
->outfd
, outch
);
3264 if (is_server
&& socktype
== SOCK_STREAM
)
3265 p
->status
= Qlisten
;
3267 #ifdef NON_BLOCKING_CONNECT
3268 if (is_non_blocking_client
)
3270 /* We may get here if connect did succeed immediately. However,
3271 in that case, we still need to signal this like a non-blocking
3273 p
->status
= Qconnect
;
3274 if (!FD_ISSET (inch
, &connect_wait_mask
))
3276 FD_SET (inch
, &connect_wait_mask
);
3277 num_pending_connects
++;
3282 /* A server may have a client filter setting of Qt, but it must
3283 still listen for incoming connects unless it is stopped. */
3284 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3285 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3287 FD_SET (inch
, &input_wait_mask
);
3288 FD_SET (inch
, &non_keyboard_wait_mask
);
3291 if (inch
> max_process_desc
)
3292 max_process_desc
= inch
;
3294 tem
= Fplist_member (contact
, QCcoding
);
3295 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3296 tem
= Qnil
; /* No error message (too late!). */
3299 /* Setup coding systems for communicating with the network stream. */
3300 struct gcpro gcpro1
;
3301 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3302 Lisp_Object coding_systems
= Qt
;
3303 Lisp_Object args
[5], val
;
3307 val
= XCAR (XCDR (tem
));
3311 else if (!NILP (Vcoding_system_for_read
))
3312 val
= Vcoding_system_for_read
;
3313 else if ((!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
))
3314 || (NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
)))
3315 /* We dare not decode end-of-line format by setting VAL to
3316 Qraw_text, because the existing Emacs Lisp libraries
3317 assume that they receive bare code including a sequene of
3322 if (NILP (host
) || NILP (service
))
3323 coding_systems
= Qnil
;
3326 args
[0] = Qopen_network_stream
, args
[1] = name
,
3327 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3329 coding_systems
= Ffind_operation_coding_system (5, args
);
3332 if (CONSP (coding_systems
))
3333 val
= XCAR (coding_systems
);
3334 else if (CONSP (Vdefault_process_coding_system
))
3335 val
= XCAR (Vdefault_process_coding_system
);
3339 p
->decode_coding_system
= val
;
3343 val
= XCAR (XCDR (tem
));
3347 else if (!NILP (Vcoding_system_for_write
))
3348 val
= Vcoding_system_for_write
;
3349 else if (NILP (current_buffer
->enable_multibyte_characters
))
3353 if (EQ (coding_systems
, Qt
))
3355 if (NILP (host
) || NILP (service
))
3356 coding_systems
= Qnil
;
3359 args
[0] = Qopen_network_stream
, args
[1] = name
,
3360 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3362 coding_systems
= Ffind_operation_coding_system (5, args
);
3366 if (CONSP (coding_systems
))
3367 val
= XCDR (coding_systems
);
3368 else if (CONSP (Vdefault_process_coding_system
))
3369 val
= XCDR (Vdefault_process_coding_system
);
3373 p
->encode_coding_system
= val
;
3375 setup_process_coding_systems (proc
);
3377 p
->decoding_buf
= make_uninit_string (0);
3378 p
->decoding_carryover
= make_number (0);
3379 p
->encoding_buf
= make_uninit_string (0);
3380 p
->encoding_carryover
= make_number (0);
3382 p
->inherit_coding_system_flag
3383 = (!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
3389 #endif /* HAVE_SOCKETS */
3392 #if defined(HAVE_SOCKETS) && defined(HAVE_NET_IF_H) && defined(HAVE_SYS_IOCTL_H)
3395 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3396 doc
: /* Return an alist of all network interfaces and their network address.
3397 Each element is a cons, the car of which is a string containing the
3398 interface name, and the cdr is the network address in internal
3399 format; see the description of ADDRESS in `make-network-process'. */)
3402 struct ifconf ifconf
;
3403 struct ifreq
*ifreqs
= NULL
;
3408 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3414 buf_size
= ifaces
* sizeof(ifreqs
[0]);
3415 ifreqs
= (struct ifreq
*)xrealloc(ifreqs
, buf_size
);
3422 ifconf
.ifc_len
= buf_size
;
3423 ifconf
.ifc_req
= ifreqs
;
3424 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3430 if (ifconf
.ifc_len
== buf_size
)
3434 ifaces
= ifconf
.ifc_len
/ sizeof (ifreqs
[0]);
3437 while (--ifaces
>= 0)
3439 struct ifreq
*ifq
= &ifreqs
[ifaces
];
3440 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3441 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3443 bcopy (ifq
->ifr_name
, namebuf
, sizeof (ifq
->ifr_name
));
3444 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3445 res
= Fcons (Fcons (build_string (namebuf
),
3446 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3447 sizeof (struct sockaddr
))),
3453 #endif /* SIOCGIFCONF */
3455 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
3462 static struct ifflag_def ifflag_table
[] = {
3466 #ifdef IFF_BROADCAST
3467 { IFF_BROADCAST
, "broadcast" },
3470 { IFF_DEBUG
, "debug" },
3473 { IFF_LOOPBACK
, "loopback" },
3475 #ifdef IFF_POINTOPOINT
3476 { IFF_POINTOPOINT
, "pointopoint" },
3479 { IFF_RUNNING
, "running" },
3482 { IFF_NOARP
, "noarp" },
3485 { IFF_PROMISC
, "promisc" },
3487 #ifdef IFF_NOTRAILERS
3488 { IFF_NOTRAILERS
, "notrailers" },
3491 { IFF_ALLMULTI
, "allmulti" },
3494 { IFF_MASTER
, "master" },
3497 { IFF_SLAVE
, "slave" },
3499 #ifdef IFF_MULTICAST
3500 { IFF_MULTICAST
, "multicast" },
3503 { IFF_PORTSEL
, "portsel" },
3505 #ifdef IFF_AUTOMEDIA
3506 { IFF_AUTOMEDIA
, "automedia" },
3509 { IFF_DYNAMIC
, "dynamic" },
3514 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3515 doc
: /* Return information about network interface named IFNAME.
3516 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3517 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3518 NETMASK is the layer 3 network mask, HWADDR is the layer 2 addres, and
3519 FLAGS is the current flags of the interface. */)
3524 Lisp_Object res
= Qnil
;
3529 CHECK_STRING (ifname
);
3531 bzero (rq
.ifr_name
, sizeof rq
.ifr_name
);
3532 strncpy (rq
.ifr_name
, SDATA (ifname
), sizeof (rq
.ifr_name
));
3534 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3539 #if defined(SIOCGIFFLAGS) && defined(HAVE_STRUCT_IFREQ_IFR_FLAGS)
3540 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3542 int flags
= rq
.ifr_flags
;
3543 struct ifflag_def
*fp
;
3547 for (fp
= ifflag_table
; flags
!= 0 && fp
; fp
++)
3549 if (flags
& fp
->flag_bit
)
3551 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3552 flags
-= fp
->flag_bit
;
3555 for (fnum
= 0; flags
&& fnum
< 32; fnum
++)
3557 if (flags
& (1 << fnum
))
3559 elt
= Fcons (make_number (fnum
), elt
);
3564 res
= Fcons (elt
, res
);
3567 #if defined(SIOCGIFHWADDR) && defined(HAVE_STRUCT_IFREQ_IFR_HWADDR)
3568 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3570 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3571 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3575 for (n
= 0; n
< 6; n
++)
3576 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3577 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3580 res
= Fcons (elt
, res
);
3583 #if defined(SIOCGIFNETMASK) && defined(ifr_netmask)
3584 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3587 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3590 res
= Fcons (elt
, res
);
3593 #if defined(SIOCGIFBRDADDR) && defined(HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3594 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3597 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3600 res
= Fcons (elt
, res
);
3603 #if defined(SIOCGIFADDR) && defined(HAVE_STRUCT_IFREQ_IFR_ADDR)
3604 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3607 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3610 res
= Fcons (elt
, res
);
3614 return any
? res
: Qnil
;
3617 #endif /* HAVE_SOCKETS */
3619 /* Turn off input and output for process PROC. */
3622 deactivate_process (proc
)
3625 register int inchannel
, outchannel
;
3626 register struct Lisp_Process
*p
= XPROCESS (proc
);
3628 inchannel
= XINT (p
->infd
);
3629 outchannel
= XINT (p
->outfd
);
3631 #ifdef ADAPTIVE_READ_BUFFERING
3632 if (XINT (p
->read_output_delay
) > 0)
3634 if (--process_output_delay_count
< 0)
3635 process_output_delay_count
= 0;
3636 XSETINT (p
->read_output_delay
, 0);
3637 p
->read_output_skip
= Qnil
;
3643 /* Beware SIGCHLD hereabouts. */
3644 flush_pending_output (inchannel
);
3647 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
3648 sys$
dassgn (outchannel
);
3649 vs
= get_vms_process_pointer (p
->pid
);
3651 give_back_vms_process_stuff (vs
);
3654 emacs_close (inchannel
);
3655 if (outchannel
>= 0 && outchannel
!= inchannel
)
3656 emacs_close (outchannel
);
3659 XSETINT (p
->infd
, -1);
3660 XSETINT (p
->outfd
, -1);
3661 #ifdef DATAGRAM_SOCKETS
3662 if (DATAGRAM_CHAN_P (inchannel
))
3664 xfree (datagram_address
[inchannel
].sa
);
3665 datagram_address
[inchannel
].sa
= 0;
3666 datagram_address
[inchannel
].len
= 0;
3669 chan_process
[inchannel
] = Qnil
;
3670 FD_CLR (inchannel
, &input_wait_mask
);
3671 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3672 #ifdef NON_BLOCKING_CONNECT
3673 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3675 FD_CLR (inchannel
, &connect_wait_mask
);
3676 if (--num_pending_connects
< 0)
3680 if (inchannel
== max_process_desc
)
3683 /* We just closed the highest-numbered process input descriptor,
3684 so recompute the highest-numbered one now. */
3685 max_process_desc
= 0;
3686 for (i
= 0; i
< MAXDESC
; i
++)
3687 if (!NILP (chan_process
[i
]))
3688 max_process_desc
= i
;
3693 /* Close all descriptors currently in use for communication
3694 with subprocess. This is used in a newly-forked subprocess
3695 to get rid of irrelevant descriptors. */
3698 close_process_descs ()
3702 for (i
= 0; i
< MAXDESC
; i
++)
3704 Lisp_Object process
;
3705 process
= chan_process
[i
];
3706 if (!NILP (process
))
3708 int in
= XINT (XPROCESS (process
)->infd
);
3709 int out
= XINT (XPROCESS (process
)->outfd
);
3712 if (out
>= 0 && in
!= out
)
3719 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3721 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3722 It is read into the process' buffers or given to their filter functions.
3723 Non-nil arg PROCESS means do not return until some output has been received
3725 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of
3726 seconds and microseconds to wait; return after that much time whether
3727 or not there is input.
3728 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
3729 from PROCESS, suspending reading output from other processes.
3730 If JUST-THIS-ONE is an integer, don't run any timers either.
3731 Return non-nil iff we received any output before the timeout expired. */)
3732 (process
, timeout
, timeout_msecs
, just_this_one
)
3733 register Lisp_Object process
, timeout
, timeout_msecs
, just_this_one
;
3738 if (! NILP (process
))
3739 CHECK_PROCESS (process
);
3741 just_this_one
= Qnil
;
3743 if (! NILP (timeout_msecs
))
3745 CHECK_NUMBER (timeout_msecs
);
3746 useconds
= XINT (timeout_msecs
);
3747 if (!INTEGERP (timeout
))
3748 XSETINT (timeout
, 0);
3751 int carry
= useconds
/ 1000000;
3753 XSETINT (timeout
, XINT (timeout
) + carry
);
3754 useconds
-= carry
* 1000000;
3756 /* I think this clause is necessary because C doesn't
3757 guarantee a particular rounding direction for negative
3761 XSETINT (timeout
, XINT (timeout
) - 1);
3762 useconds
+= 1000000;
3769 if (! NILP (timeout
))
3771 CHECK_NUMBER (timeout
);
3772 seconds
= XINT (timeout
);
3773 if (seconds
< 0 || (seconds
== 0 && useconds
== 0))
3777 seconds
= NILP (process
) ? -1 : 0;
3780 (wait_reading_process_output (seconds
, useconds
, 0, 0,
3782 !NILP (process
) ? XPROCESS (process
) : NULL
,
3783 NILP (just_this_one
) ? 0 :
3784 !INTEGERP (just_this_one
) ? 1 : -1)
3788 /* Accept a connection for server process SERVER on CHANNEL. */
3790 static int connect_counter
= 0;
3793 server_accept_connection (server
, channel
)
3797 Lisp_Object proc
, caller
, name
, buffer
;
3798 Lisp_Object contact
, host
, service
;
3799 struct Lisp_Process
*ps
= XPROCESS (server
);
3800 struct Lisp_Process
*p
;
3804 struct sockaddr_in in
;
3805 #ifdef HAVE_LOCAL_SOCKETS
3806 struct sockaddr_un un
;
3809 int len
= sizeof saddr
;
3811 s
= accept (channel
, &saddr
.sa
, &len
);
3820 if (code
== EWOULDBLOCK
)
3824 if (!NILP (ps
->log
))
3825 call3 (ps
->log
, server
, Qnil
,
3826 concat3 (build_string ("accept failed with code"),
3827 Fnumber_to_string (make_number (code
)),
3828 build_string ("\n")));
3834 /* Setup a new process to handle the connection. */
3836 /* Generate a unique identification of the caller, and build contact
3837 information for this process. */
3840 switch (saddr
.sa
.sa_family
)
3844 Lisp_Object args
[5];
3845 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
3846 args
[0] = build_string ("%d.%d.%d.%d");
3847 args
[1] = make_number (*ip
++);
3848 args
[2] = make_number (*ip
++);
3849 args
[3] = make_number (*ip
++);
3850 args
[4] = make_number (*ip
++);
3851 host
= Fformat (5, args
);
3852 service
= make_number (ntohs (saddr
.in
.sin_port
));
3854 args
[0] = build_string (" <%s:%d>");
3857 caller
= Fformat (3, args
);
3861 #ifdef HAVE_LOCAL_SOCKETS
3865 caller
= Fnumber_to_string (make_number (connect_counter
));
3866 caller
= concat3 (build_string (" <*"), caller
, build_string ("*>"));
3870 /* Create a new buffer name for this process if it doesn't have a
3871 filter. The new buffer name is based on the buffer name or
3872 process name of the server process concatenated with the caller
3875 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
3879 buffer
= ps
->buffer
;
3881 buffer
= Fbuffer_name (buffer
);
3886 buffer
= concat2 (buffer
, caller
);
3887 buffer
= Fget_buffer_create (buffer
);
3891 /* Generate a unique name for the new server process. Combine the
3892 server process name with the caller identification. */
3894 name
= concat2 (ps
->name
, caller
);
3895 proc
= make_process (name
);
3897 chan_process
[s
] = proc
;
3900 fcntl (s
, F_SETFL
, O_NONBLOCK
);
3903 fcntl (s
, F_SETFL
, O_NDELAY
);
3907 p
= XPROCESS (proc
);
3909 /* Build new contact information for this setup. */
3910 contact
= Fcopy_sequence (ps
->childp
);
3911 contact
= Fplist_put (contact
, QCserver
, Qnil
);
3912 contact
= Fplist_put (contact
, QChost
, host
);
3913 if (!NILP (service
))
3914 contact
= Fplist_put (contact
, QCservice
, service
);
3915 contact
= Fplist_put (contact
, QCremote
,
3916 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
3917 #ifdef HAVE_GETSOCKNAME
3919 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
3920 contact
= Fplist_put (contact
, QClocal
,
3921 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
3924 p
->childp
= contact
;
3925 p
->plist
= Fcopy_sequence (ps
->plist
);
3928 p
->sentinel
= ps
->sentinel
;
3929 p
->filter
= ps
->filter
;
3932 XSETINT (p
->infd
, s
);
3933 XSETINT (p
->outfd
, s
);
3936 /* Client processes for accepted connections are not stopped initially. */
3937 if (!EQ (p
->filter
, Qt
))
3939 FD_SET (s
, &input_wait_mask
);
3940 FD_SET (s
, &non_keyboard_wait_mask
);
3943 if (s
> max_process_desc
)
3944 max_process_desc
= s
;
3946 /* Setup coding system for new process based on server process.
3947 This seems to be the proper thing to do, as the coding system
3948 of the new process should reflect the settings at the time the
3949 server socket was opened; not the current settings. */
3951 p
->decode_coding_system
= ps
->decode_coding_system
;
3952 p
->encode_coding_system
= ps
->encode_coding_system
;
3953 setup_process_coding_systems (proc
);
3955 p
->decoding_buf
= make_uninit_string (0);
3956 p
->decoding_carryover
= make_number (0);
3957 p
->encoding_buf
= make_uninit_string (0);
3958 p
->encoding_carryover
= make_number (0);
3960 p
->inherit_coding_system_flag
3961 = (NILP (buffer
) ? Qnil
: ps
->inherit_coding_system_flag
);
3963 if (!NILP (ps
->log
))
3964 call3 (ps
->log
, server
, proc
,
3965 concat3 (build_string ("accept from "),
3966 (STRINGP (host
) ? host
: build_string ("-")),
3967 build_string ("\n")));
3969 if (!NILP (p
->sentinel
))
3970 exec_sentinel (proc
,
3971 concat3 (build_string ("open from "),
3972 (STRINGP (host
) ? host
: build_string ("-")),
3973 build_string ("\n")));
3976 /* This variable is different from waiting_for_input in keyboard.c.
3977 It is used to communicate to a lisp process-filter/sentinel (via the
3978 function Fwaiting_for_user_input_p below) whether Emacs was waiting
3979 for user-input when that process-filter was called.
3980 waiting_for_input cannot be used as that is by definition 0 when
3981 lisp code is being evalled.
3982 This is also used in record_asynch_buffer_change.
3983 For that purpose, this must be 0
3984 when not inside wait_reading_process_output. */
3985 static int waiting_for_user_input_p
;
3987 /* This is here so breakpoints can be put on it. */
3989 wait_reading_process_output_1 ()
3993 /* Read and dispose of subprocess output while waiting for timeout to
3994 elapse and/or keyboard input to be available.
3997 timeout in seconds, or
3998 zero for no limit, or
3999 -1 means gobble data immediately available but don't wait for any.
4002 an additional duration to wait, measured in microseconds.
4003 If this is nonzero and time_limit is 0, then the timeout
4004 consists of MICROSECS only.
4006 READ_KBD is a lisp value:
4007 0 to ignore keyboard input, or
4008 1 to return when input is available, or
4009 -1 meaning caller will actually read the input, so don't throw to
4010 the quit handler, or
4012 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4013 output that arrives.
4015 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4016 (and gobble terminal input into the buffer if any arrives).
4018 If WAIT_PROC is specified, wait until something arrives from that
4019 process. The return value is true iff we read some input from
4022 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4023 (suspending output from other processes). A negative value
4024 means don't run any timers either.
4026 If WAIT_PROC is specified, then the function returns true iff we
4027 received input from that process before the timeout elapsed.
4028 Otherwise, return true iff we received input from any process. */
4031 wait_reading_process_output (time_limit
, microsecs
, read_kbd
, do_display
,
4032 wait_for_cell
, wait_proc
, just_wait_proc
)
4033 int time_limit
, microsecs
, read_kbd
, do_display
;
4034 Lisp_Object wait_for_cell
;
4035 struct Lisp_Process
*wait_proc
;
4038 register int channel
, nfds
;
4039 SELECT_TYPE Available
;
4040 #ifdef NON_BLOCKING_CONNECT
4041 SELECT_TYPE Connecting
;
4044 int check_delay
, no_avail
;
4047 EMACS_TIME timeout
, end_time
;
4048 int wait_channel
= -1;
4049 int got_some_input
= 0;
4050 /* Either nil or a cons cell, the car of which is of interest and
4051 may be changed outside of this routine. */
4052 int saved_waiting_for_user_input_p
= waiting_for_user_input_p
;
4054 FD_ZERO (&Available
);
4055 #ifdef NON_BLOCKING_CONNECT
4056 FD_ZERO (&Connecting
);
4059 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4060 if (wait_proc
!= NULL
)
4061 wait_channel
= XINT (wait_proc
->infd
);
4063 waiting_for_user_input_p
= read_kbd
;
4065 /* Since we may need to wait several times,
4066 compute the absolute time to return at. */
4067 if (time_limit
|| microsecs
)
4069 EMACS_GET_TIME (end_time
);
4070 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4071 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4073 #ifdef POLL_INTERRUPTED_SYS_CALL
4074 /* AlainF 5-Jul-1996
4075 HP-UX 10.10 seem to have problems with signals coming in
4076 Causes "poll: interrupted system call" messages when Emacs is run
4078 Turn off periodic alarms (in case they are in use),
4079 and then turn off any other atimers. */
4081 turn_on_atimers (0);
4082 #endif /* POLL_INTERRUPTED_SYS_CALL */
4086 int timeout_reduced_for_timers
= 0;
4088 /* If calling from keyboard input, do not quit
4089 since we want to return C-g as an input character.
4090 Otherwise, do pending quit if requested. */
4094 else if (interrupt_input_pending
)
4095 handle_async_input ();
4098 /* Exit now if the cell we're waiting for became non-nil. */
4099 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4102 /* Compute time from now till when time limit is up */
4103 /* Exit if already run out */
4104 if (time_limit
== -1)
4106 /* -1 specified for timeout means
4107 gobble output available now
4108 but don't wait at all. */
4110 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4112 else if (time_limit
|| microsecs
)
4114 EMACS_GET_TIME (timeout
);
4115 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4116 if (EMACS_TIME_NEG_P (timeout
))
4121 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4124 /* Normally we run timers here.
4125 But not if wait_for_cell; in those cases,
4126 the wait is supposed to be short,
4127 and those callers cannot handle running arbitrary Lisp code here. */
4128 if (NILP (wait_for_cell
)
4129 && just_wait_proc
>= 0)
4131 EMACS_TIME timer_delay
;
4135 int old_timers_run
= timers_run
;
4136 struct buffer
*old_buffer
= current_buffer
;
4138 timer_delay
= timer_check (1);
4140 /* If a timer has run, this might have changed buffers
4141 an alike. Make read_key_sequence aware of that. */
4142 if (timers_run
!= old_timers_run
4143 && old_buffer
!= current_buffer
4144 && waiting_for_user_input_p
== -1)
4145 record_asynch_buffer_change ();
4147 if (timers_run
!= old_timers_run
&& do_display
)
4148 /* We must retry, since a timer may have requeued itself
4149 and that could alter the time_delay. */
4150 redisplay_preserve_echo_area (9);
4154 while (!detect_input_pending ());
4156 /* If there is unread keyboard input, also return. */
4158 && requeued_events_pending_p ())
4161 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4163 EMACS_TIME difference
;
4164 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4165 if (EMACS_TIME_NEG_P (difference
))
4167 timeout
= timer_delay
;
4168 timeout_reduced_for_timers
= 1;
4171 /* If time_limit is -1, we are not going to wait at all. */
4172 else if (time_limit
!= -1)
4174 /* This is so a breakpoint can be put here. */
4175 wait_reading_process_output_1 ();
4179 /* Cause C-g and alarm signals to take immediate action,
4180 and cause input available signals to zero out timeout.
4182 It is important that we do this before checking for process
4183 activity. If we get a SIGCHLD after the explicit checks for
4184 process activity, timeout is the only way we will know. */
4186 set_waiting_for_input (&timeout
);
4188 /* If status of something has changed, and no input is
4189 available, notify the user of the change right away. After
4190 this explicit check, we'll let the SIGCHLD handler zap
4191 timeout to get our attention. */
4192 if (update_tick
!= process_tick
&& do_display
)
4195 #ifdef NON_BLOCKING_CONNECT
4199 Atemp
= input_wait_mask
;
4201 /* On Mac OS X 10.0, the SELECT system call always says input is
4202 present (for reading) at stdin, even when none is. This
4203 causes the call to SELECT below to return 1 and
4204 status_notify not to be called. As a result output of
4205 subprocesses are incorrectly discarded.
4209 IF_NON_BLOCKING_CONNECT (Ctemp
= connect_wait_mask
);
4211 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4212 if ((select (max (max_process_desc
, max_keyboard_desc
) + 1,
4214 #ifdef NON_BLOCKING_CONNECT
4215 (num_pending_connects
> 0 ? &Ctemp
: (SELECT_TYPE
*)0),
4219 (SELECT_TYPE
*)0, &timeout
)
4222 /* It's okay for us to do this and then continue with
4223 the loop, since timeout has already been zeroed out. */
4224 clear_waiting_for_input ();
4229 /* Don't wait for output from a non-running process. Just
4230 read whatever data has already been received. */
4231 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
4232 update_status (wait_proc
);
4234 && ! EQ (wait_proc
->status
, Qrun
)
4235 && ! EQ (wait_proc
->status
, Qconnect
))
4237 int nread
, total_nread
= 0;
4239 clear_waiting_for_input ();
4240 XSETPROCESS (proc
, wait_proc
);
4242 /* Read data from the process, until we exhaust it. */
4243 while (XINT (wait_proc
->infd
) >= 0)
4245 nread
= read_process_output (proc
, XINT (wait_proc
->infd
));
4251 total_nread
+= nread
;
4253 else if (nread
== -1 && EIO
== errno
)
4257 else if (nread
== -1 && EAGAIN
== errno
)
4261 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4265 if (total_nread
> 0 && do_display
)
4266 redisplay_preserve_echo_area (10);
4271 /* Wait till there is something to do */
4273 if (wait_proc
&& just_wait_proc
)
4275 if (XINT (wait_proc
->infd
) < 0) /* Terminated */
4277 FD_SET (XINT (wait_proc
->infd
), &Available
);
4279 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4281 else if (!NILP (wait_for_cell
))
4283 Available
= non_process_wait_mask
;
4285 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4290 Available
= non_keyboard_wait_mask
;
4292 Available
= input_wait_mask
;
4293 IF_NON_BLOCKING_CONNECT (check_connect
= (num_pending_connects
> 0));
4294 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4297 /* If frame size has changed or the window is newly mapped,
4298 redisplay now, before we start to wait. There is a race
4299 condition here; if a SIGIO arrives between now and the select
4300 and indicates that a frame is trashed, the select may block
4301 displaying a trashed screen. */
4302 if (frame_garbaged
&& do_display
)
4304 clear_waiting_for_input ();
4305 redisplay_preserve_echo_area (11);
4307 set_waiting_for_input (&timeout
);
4311 if (read_kbd
&& detect_input_pending ())
4318 #ifdef NON_BLOCKING_CONNECT
4320 Connecting
= connect_wait_mask
;
4323 #ifdef ADAPTIVE_READ_BUFFERING
4324 /* Set the timeout for adaptive read buffering if any
4325 process has non-nil read_output_skip and non-zero
4326 read_output_delay, and we are not reading output for a
4327 specific wait_channel. It is not executed if
4328 Vprocess_adaptive_read_buffering is nil. */
4329 if (process_output_skip
&& check_delay
> 0)
4331 int usecs
= EMACS_USECS (timeout
);
4332 if (EMACS_SECS (timeout
) > 0 || usecs
> READ_OUTPUT_DELAY_MAX
)
4333 usecs
= READ_OUTPUT_DELAY_MAX
;
4334 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4336 proc
= chan_process
[channel
];
4339 /* Find minimum non-zero read_output_delay among the
4340 processes with non-nil read_output_skip. */
4341 if (XINT (XPROCESS (proc
)->read_output_delay
) > 0)
4344 if (NILP (XPROCESS (proc
)->read_output_skip
))
4346 FD_CLR (channel
, &Available
);
4347 XPROCESS (proc
)->read_output_skip
= Qnil
;
4348 if (XINT (XPROCESS (proc
)->read_output_delay
) < usecs
)
4349 usecs
= XINT (XPROCESS (proc
)->read_output_delay
);
4352 EMACS_SET_SECS_USECS (timeout
, 0, usecs
);
4353 process_output_skip
= 0;
4357 nfds
= select (max (max_process_desc
, max_keyboard_desc
) + 1,
4359 #ifdef NON_BLOCKING_CONNECT
4360 (check_connect
? &Connecting
: (SELECT_TYPE
*)0),
4364 (SELECT_TYPE
*)0, &timeout
);
4369 /* Make C-g and alarm signals set flags again */
4370 clear_waiting_for_input ();
4372 /* If we woke up due to SIGWINCH, actually change size now. */
4373 do_pending_window_change (0);
4375 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4376 /* We wanted the full specified time, so return now. */
4380 if (xerrno
== EINTR
)
4383 /* Ultrix select seems to return ENOMEM when it is
4384 interrupted. Treat it just like EINTR. Bleah. Note
4385 that we want to test for the "ultrix" CPP symbol, not
4386 "__ultrix__"; the latter is only defined under GCC, but
4387 not by DEC's bundled CC. -JimB */
4388 else if (xerrno
== ENOMEM
)
4392 /* This happens for no known reason on ALLIANT.
4393 I am guessing that this is the right response. -- RMS. */
4394 else if (xerrno
== EFAULT
)
4397 else if (xerrno
== EBADF
)
4400 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4401 the child's closure of the pts gives the parent a SIGHUP, and
4402 the ptc file descriptor is automatically closed,
4403 yielding EBADF here or at select() call above.
4404 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4405 in m/ibmrt-aix.h), and here we just ignore the select error.
4406 Cleanup occurs c/o status_notify after SIGCLD. */
4407 no_avail
= 1; /* Cannot depend on values returned */
4413 error ("select error: %s", emacs_strerror (xerrno
));
4418 FD_ZERO (&Available
);
4419 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4422 #if defined(sun) && !defined(USG5_4)
4423 if (nfds
> 0 && keyboard_bit_set (&Available
)
4425 /* System sometimes fails to deliver SIGIO.
4427 David J. Mackenzie says that Emacs doesn't compile under
4428 Solaris if this code is enabled, thus the USG5_4 in the CPP
4429 conditional. "I haven't noticed any ill effects so far.
4430 If you find a Solaris expert somewhere, they might know
4432 kill (getpid (), SIGIO
);
4435 #if 0 /* When polling is used, interrupt_input is 0,
4436 so get_input_pending should read the input.
4437 So this should not be needed. */
4438 /* If we are using polling for input,
4439 and we see input available, make it get read now.
4440 Otherwise it might not actually get read for a second.
4441 And on hpux, since we turn off polling in wait_reading_process_output,
4442 it might never get read at all if we don't spend much time
4443 outside of wait_reading_process_output. */
4444 if (read_kbd
&& interrupt_input
4445 && keyboard_bit_set (&Available
)
4446 && input_polling_used ())
4447 kill (getpid (), SIGALRM
);
4450 /* Check for keyboard input */
4451 /* If there is any, return immediately
4452 to give it higher priority than subprocesses */
4456 int old_timers_run
= timers_run
;
4457 struct buffer
*old_buffer
= current_buffer
;
4460 if (detect_input_pending_run_timers (do_display
))
4462 swallow_events (do_display
);
4463 if (detect_input_pending_run_timers (do_display
))
4467 /* If a timer has run, this might have changed buffers
4468 an alike. Make read_key_sequence aware of that. */
4469 if (timers_run
!= old_timers_run
4470 && waiting_for_user_input_p
== -1
4471 && old_buffer
!= current_buffer
)
4472 record_asynch_buffer_change ();
4478 /* If there is unread keyboard input, also return. */
4480 && requeued_events_pending_p ())
4483 /* If we are not checking for keyboard input now,
4484 do process events (but don't run any timers).
4485 This is so that X events will be processed.
4486 Otherwise they may have to wait until polling takes place.
4487 That would causes delays in pasting selections, for example.
4489 (We used to do this only if wait_for_cell.) */
4490 if (read_kbd
== 0 && detect_input_pending ())
4492 swallow_events (do_display
);
4493 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4494 if (detect_input_pending ())
4499 /* Exit now if the cell we're waiting for became non-nil. */
4500 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4504 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4505 go read it. This can happen with X on BSD after logging out.
4506 In that case, there really is no input and no SIGIO,
4507 but select says there is input. */
4509 if (read_kbd
&& interrupt_input
4510 && keyboard_bit_set (&Available
) && ! noninteractive
)
4511 kill (getpid (), SIGIO
);
4515 got_some_input
|= nfds
> 0;
4517 /* If checking input just got us a size-change event from X,
4518 obey it now if we should. */
4519 if (read_kbd
|| ! NILP (wait_for_cell
))
4520 do_pending_window_change (0);
4522 /* Check for data from a process. */
4523 if (no_avail
|| nfds
== 0)
4526 /* Really FIRST_PROC_DESC should be 0 on Unix,
4527 but this is safer in the short run. */
4528 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4530 if (FD_ISSET (channel
, &Available
)
4531 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
4535 /* If waiting for this channel, arrange to return as
4536 soon as no more input to be processed. No more
4538 if (wait_channel
== channel
)
4544 proc
= chan_process
[channel
];
4548 /* If this is a server stream socket, accept connection. */
4549 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4551 server_accept_connection (proc
, channel
);
4555 /* Read data from the process, starting with our
4556 buffered-ahead character if we have one. */
4558 nread
= read_process_output (proc
, channel
);
4561 /* Since read_process_output can run a filter,
4562 which can call accept-process-output,
4563 don't try to read from any other processes
4564 before doing the select again. */
4565 FD_ZERO (&Available
);
4568 redisplay_preserve_echo_area (12);
4571 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4574 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4575 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4577 else if (nread
== -1 && errno
== EAGAIN
)
4581 else if (nread
== -1 && errno
== EAGAIN
)
4583 /* Note that we cannot distinguish between no input
4584 available now and a closed pipe.
4585 With luck, a closed pipe will be accompanied by
4586 subprocess termination and SIGCHLD. */
4587 else if (nread
== 0 && !NETCONN_P (proc
))
4589 #endif /* O_NDELAY */
4590 #endif /* O_NONBLOCK */
4592 /* On some OSs with ptys, when the process on one end of
4593 a pty exits, the other end gets an error reading with
4594 errno = EIO instead of getting an EOF (0 bytes read).
4595 Therefore, if we get an error reading and errno =
4596 EIO, just continue, because the child process has
4597 exited and should clean itself up soon (e.g. when we
4600 However, it has been known to happen that the SIGCHLD
4601 got lost. So raise the signl again just in case.
4603 else if (nread
== -1 && errno
== EIO
)
4604 kill (getpid (), SIGCHLD
);
4605 #endif /* HAVE_PTYS */
4606 /* If we can detect process termination, don't consider the process
4607 gone just because its pipe is closed. */
4609 else if (nread
== 0 && !NETCONN_P (proc
))
4614 /* Preserve status of processes already terminated. */
4615 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
4616 deactivate_process (proc
);
4617 if (!NILP (XPROCESS (proc
)->raw_status_low
))
4618 update_status (XPROCESS (proc
));
4619 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4620 XPROCESS (proc
)->status
4621 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
4624 #ifdef NON_BLOCKING_CONNECT
4625 if (check_connect
&& FD_ISSET (channel
, &Connecting
)
4626 && FD_ISSET (channel
, &connect_wait_mask
))
4628 struct Lisp_Process
*p
;
4630 FD_CLR (channel
, &connect_wait_mask
);
4631 if (--num_pending_connects
< 0)
4634 proc
= chan_process
[channel
];
4638 p
= XPROCESS (proc
);
4641 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4642 So only use it on systems where it is known to work. */
4644 int xlen
= sizeof(xerrno
);
4645 if (getsockopt(channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4650 struct sockaddr pname
;
4651 int pnamelen
= sizeof(pname
);
4653 /* If connection failed, getpeername will fail. */
4655 if (getpeername(channel
, &pname
, &pnamelen
) < 0)
4657 /* Obtain connect failure code through error slippage. */
4660 if (errno
== ENOTCONN
&& read(channel
, &dummy
, 1) < 0)
4667 XSETINT (p
->tick
, ++process_tick
);
4668 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
4669 deactivate_process (proc
);
4674 /* Execute the sentinel here. If we had relied on
4675 status_notify to do it later, it will read input
4676 from the process before calling the sentinel. */
4677 exec_sentinel (proc
, build_string ("open\n"));
4678 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4680 FD_SET (XINT (p
->infd
), &input_wait_mask
);
4681 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
4685 #endif /* NON_BLOCKING_CONNECT */
4686 } /* end for each file descriptor */
4687 } /* end while exit conditions not met */
4689 waiting_for_user_input_p
= saved_waiting_for_user_input_p
;
4691 /* If calling from keyboard input, do not quit
4692 since we want to return C-g as an input character.
4693 Otherwise, do pending quit if requested. */
4696 /* Prevent input_pending from remaining set if we quit. */
4697 clear_input_pending ();
4700 #ifdef POLL_INTERRUPTED_SYS_CALL
4701 /* AlainF 5-Jul-1996
4702 HP-UX 10.10 seems to have problems with signals coming in
4703 Causes "poll: interrupted system call" messages when Emacs is run
4705 Turn periodic alarms back on */
4707 #endif /* POLL_INTERRUPTED_SYS_CALL */
4709 return got_some_input
;
4712 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
4715 read_process_output_call (fun_and_args
)
4716 Lisp_Object fun_and_args
;
4718 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
4722 read_process_output_error_handler (error
)
4725 cmd_error_internal (error
, "error in process filter: ");
4727 update_echo_area ();
4728 Fsleep_for (make_number (2), Qnil
);
4732 /* Read pending output from the process channel,
4733 starting with our buffered-ahead character if we have one.
4734 Yield number of decoded characters read.
4736 This function reads at most 4096 characters.
4737 If you want to read all available subprocess output,
4738 you must call it repeatedly until it returns zero.
4740 The characters read are decoded according to PROC's coding-system
4744 read_process_output (proc
, channel
)
4746 register int channel
;
4748 register int nbytes
;
4750 register Lisp_Object outstream
;
4751 register struct buffer
*old
= current_buffer
;
4752 register struct Lisp_Process
*p
= XPROCESS (proc
);
4753 register int opoint
;
4754 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
4755 int carryover
= XINT (p
->decoding_carryover
);
4759 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
4761 vs
= get_vms_process_pointer (p
->pid
);
4765 return (0); /* Really weird if it does this */
4766 if (!(vs
->iosb
[0] & 1))
4767 return -1; /* I/O error */
4770 error ("Could not get VMS process pointer");
4771 chars
= vs
->inputBuffer
;
4772 nbytes
= clean_vms_buffer (chars
, vs
->iosb
[1]);
4775 start_vms_process_read (vs
); /* Crank up the next read on the process */
4776 return 1; /* Nothing worth printing, say we got 1 */
4780 /* The data carried over in the previous decoding (which are at
4781 the tail of decoding buffer) should be prepended to the new
4782 data read to decode all together. */
4783 chars
= (char *) alloca (nbytes
+ carryover
);
4784 bcopy (SDATA (p
->decoding_buf
), buf
, carryover
);
4785 bcopy (vs
->inputBuffer
, chars
+ carryover
, nbytes
);
4789 chars
= (char *) alloca (carryover
+ readmax
);
4791 /* See the comment above. */
4792 bcopy (SDATA (p
->decoding_buf
), chars
, carryover
);
4794 #ifdef DATAGRAM_SOCKETS
4795 /* We have a working select, so proc_buffered_char is always -1. */
4796 if (DATAGRAM_CHAN_P (channel
))
4798 int len
= datagram_address
[channel
].len
;
4799 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
4800 0, datagram_address
[channel
].sa
, &len
);
4804 if (proc_buffered_char
[channel
] < 0)
4806 nbytes
= emacs_read (channel
, chars
+ carryover
, readmax
);
4807 #ifdef ADAPTIVE_READ_BUFFERING
4808 if (nbytes
> 0 && !NILP (p
->adaptive_read_buffering
))
4810 int delay
= XINT (p
->read_output_delay
);
4813 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
4816 process_output_delay_count
++;
4817 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
4820 else if (delay
> 0 && (nbytes
== readmax
))
4822 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
4824 process_output_delay_count
--;
4826 XSETINT (p
->read_output_delay
, delay
);
4829 p
->read_output_skip
= Qt
;
4830 process_output_skip
= 1;
4837 chars
[carryover
] = proc_buffered_char
[channel
];
4838 proc_buffered_char
[channel
] = -1;
4839 nbytes
= emacs_read (channel
, chars
+ carryover
+ 1, readmax
- 1);
4843 nbytes
= nbytes
+ 1;
4845 #endif /* not VMS */
4847 XSETINT (p
->decoding_carryover
, 0);
4849 /* At this point, NBYTES holds number of bytes just received
4850 (including the one in proc_buffered_char[channel]). */
4853 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
4855 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
4858 /* Now set NBYTES how many bytes we must decode. */
4859 nbytes
+= carryover
;
4861 /* Read and dispose of the process output. */
4862 outstream
= p
->filter
;
4863 if (!NILP (outstream
))
4865 /* We inhibit quit here instead of just catching it so that
4866 hitting ^G when a filter happens to be running won't screw
4868 int count
= SPECPDL_INDEX ();
4869 Lisp_Object odeactivate
;
4870 Lisp_Object obuffer
, okeymap
;
4872 int outer_running_asynch_code
= running_asynch_code
;
4873 int waiting
= waiting_for_user_input_p
;
4875 /* No need to gcpro these, because all we do with them later
4876 is test them for EQness, and none of them should be a string. */
4877 odeactivate
= Vdeactivate_mark
;
4878 XSETBUFFER (obuffer
, current_buffer
);
4879 okeymap
= current_buffer
->keymap
;
4881 specbind (Qinhibit_quit
, Qt
);
4882 specbind (Qlast_nonmenu_event
, Qt
);
4884 /* In case we get recursively called,
4885 and we already saved the match data nonrecursively,
4886 save the same match data in safely recursive fashion. */
4887 if (outer_running_asynch_code
)
4890 /* Don't clobber the CURRENT match data, either! */
4891 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
4892 restore_search_regs ();
4893 record_unwind_save_match_data ();
4894 Fset_match_data (tem
, Qt
);
4897 /* For speed, if a search happens within this code,
4898 save the match data in a special nonrecursive fashion. */
4899 running_asynch_code
= 1;
4901 decode_coding_c_string (coding
, chars
, nbytes
, Qt
);
4902 text
= coding
->dst_object
;
4903 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
4904 /* A new coding system might be found. */
4905 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
4907 p
->decode_coding_system
= Vlast_coding_system_used
;
4909 /* Don't call setup_coding_system for
4910 proc_decode_coding_system[channel] here. It is done in
4911 detect_coding called via decode_coding above. */
4913 /* If a coding system for encoding is not yet decided, we set
4914 it as the same as coding-system for decoding.
4916 But, before doing that we must check if
4917 proc_encode_coding_system[p->outfd] surely points to a
4918 valid memory because p->outfd will be changed once EOF is
4919 sent to the process. */
4920 if (NILP (p
->encode_coding_system
)
4921 && proc_encode_coding_system
[XINT (p
->outfd
)])
4923 p
->encode_coding_system
= Vlast_coding_system_used
;
4924 setup_coding_system (p
->encode_coding_system
,
4925 proc_encode_coding_system
[XINT (p
->outfd
)]);
4929 if (coding
->carryover_bytes
> 0)
4931 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
4932 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
4933 bcopy (coding
->carryover
, SDATA (p
->decoding_buf
),
4934 coding
->carryover_bytes
);
4935 XSETINT (p
->decoding_carryover
, coding
->carryover_bytes
);
4937 /* Adjust the multibyteness of TEXT to that of the filter. */
4938 if (NILP (p
->filter_multibyte
) != ! STRING_MULTIBYTE (text
))
4939 text
= (STRING_MULTIBYTE (text
)
4940 ? Fstring_as_unibyte (text
)
4941 : Fstring_to_multibyte (text
));
4942 if (SBYTES (text
) > 0)
4943 internal_condition_case_1 (read_process_output_call
,
4945 Fcons (proc
, Fcons (text
, Qnil
))),
4946 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
4947 read_process_output_error_handler
);
4949 /* If we saved the match data nonrecursively, restore it now. */
4950 restore_search_regs ();
4951 running_asynch_code
= outer_running_asynch_code
;
4953 /* Handling the process output should not deactivate the mark. */
4954 Vdeactivate_mark
= odeactivate
;
4956 /* Restore waiting_for_user_input_p as it was
4957 when we were called, in case the filter clobbered it. */
4958 waiting_for_user_input_p
= waiting
;
4960 #if 0 /* Call record_asynch_buffer_change unconditionally,
4961 because we might have changed minor modes or other things
4962 that affect key bindings. */
4963 if (! EQ (Fcurrent_buffer (), obuffer
)
4964 || ! EQ (current_buffer
->keymap
, okeymap
))
4966 /* But do it only if the caller is actually going to read events.
4967 Otherwise there's no need to make him wake up, and it could
4968 cause trouble (for example it would make Fsit_for return). */
4969 if (waiting_for_user_input_p
== -1)
4970 record_asynch_buffer_change ();
4973 start_vms_process_read (vs
);
4975 unbind_to (count
, Qnil
);
4979 /* If no filter, write into buffer if it isn't dead. */
4980 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
4982 Lisp_Object old_read_only
;
4983 int old_begv
, old_zv
;
4984 int old_begv_byte
, old_zv_byte
;
4985 Lisp_Object odeactivate
;
4986 int before
, before_byte
;
4991 odeactivate
= Vdeactivate_mark
;
4993 Fset_buffer (p
->buffer
);
4995 opoint_byte
= PT_BYTE
;
4996 old_read_only
= current_buffer
->read_only
;
4999 old_begv_byte
= BEGV_BYTE
;
5000 old_zv_byte
= ZV_BYTE
;
5002 current_buffer
->read_only
= Qnil
;
5004 /* Insert new output into buffer
5005 at the current end-of-output marker,
5006 thus preserving logical ordering of input and output. */
5007 if (XMARKER (p
->mark
)->buffer
)
5008 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
5009 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
5012 SET_PT_BOTH (ZV
, ZV_BYTE
);
5014 before_byte
= PT_BYTE
;
5016 /* If the output marker is outside of the visible region, save
5017 the restriction and widen. */
5018 if (! (BEGV
<= PT
&& PT
<= ZV
))
5021 decode_coding_c_string (coding
, chars
, nbytes
, Qt
);
5022 text
= coding
->dst_object
;
5023 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5024 /* A new coding system might be found. See the comment in the
5025 similar code in the previous `if' block. */
5026 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5028 p
->decode_coding_system
= Vlast_coding_system_used
;
5029 if (NILP (p
->encode_coding_system
)
5030 && proc_encode_coding_system
[XINT (p
->outfd
)])
5032 p
->encode_coding_system
= Vlast_coding_system_used
;
5033 setup_coding_system (p
->encode_coding_system
,
5034 proc_encode_coding_system
[XINT (p
->outfd
)]);
5037 if (coding
->carryover_bytes
> 0)
5039 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5040 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5041 bcopy (coding
->carryover
, SDATA (p
->decoding_buf
),
5042 coding
->carryover_bytes
);
5043 XSETINT (p
->decoding_carryover
, coding
->carryover_bytes
);
5045 /* Adjust the multibyteness of TEXT to that of the buffer. */
5046 if (NILP (current_buffer
->enable_multibyte_characters
)
5047 != ! STRING_MULTIBYTE (text
))
5048 text
= (STRING_MULTIBYTE (text
)
5049 ? Fstring_as_unibyte (text
)
5050 : Fstring_to_multibyte (text
));
5051 /* Insert before markers in case we are inserting where
5052 the buffer's mark is, and the user's next command is Meta-y. */
5053 insert_from_string_before_markers (text
, 0, 0,
5054 SCHARS (text
), SBYTES (text
), 0);
5056 /* Make sure the process marker's position is valid when the
5057 process buffer is changed in the signal_after_change above.
5058 W3 is known to do that. */
5059 if (BUFFERP (p
->buffer
)
5060 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5061 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5063 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5065 update_mode_lines
++;
5067 /* Make sure opoint and the old restrictions
5068 float ahead of any new text just as point would. */
5069 if (opoint
>= before
)
5071 opoint
+= PT
- before
;
5072 opoint_byte
+= PT_BYTE
- before_byte
;
5074 if (old_begv
> before
)
5076 old_begv
+= PT
- before
;
5077 old_begv_byte
+= PT_BYTE
- before_byte
;
5079 if (old_zv
>= before
)
5081 old_zv
+= PT
- before
;
5082 old_zv_byte
+= PT_BYTE
- before_byte
;
5085 /* If the restriction isn't what it should be, set it. */
5086 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5087 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5089 /* Handling the process output should not deactivate the mark. */
5090 Vdeactivate_mark
= odeactivate
;
5092 current_buffer
->read_only
= old_read_only
;
5093 SET_PT_BOTH (opoint
, opoint_byte
);
5094 set_buffer_internal (old
);
5097 start_vms_process_read (vs
);
5102 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
5104 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
5105 This is intended for use by asynchronous process output filters and sentinels. */)
5108 return (waiting_for_user_input_p
? Qt
: Qnil
);
5111 /* Sending data to subprocess */
5113 jmp_buf send_process_frame
;
5114 Lisp_Object process_sent_to
;
5117 send_process_trap ()
5119 SIGNAL_THREAD_CHECK (SIGPIPE
);
5124 sigunblock (sigmask (SIGPIPE
));
5125 longjmp (send_process_frame
, 1);
5128 /* Send some data to process PROC.
5129 BUF is the beginning of the data; LEN is the number of characters.
5130 OBJECT is the Lisp object that the data comes from. If OBJECT is
5131 nil or t, it means that the data comes from C string.
5133 If OBJECT is not nil, the data is encoded by PROC's coding-system
5134 for encoding before it is sent.
5136 This function can evaluate Lisp code and can garbage collect. */
5139 send_process (proc
, buf
, len
, object
)
5140 volatile Lisp_Object proc
;
5141 unsigned char *volatile buf
;
5143 volatile Lisp_Object object
;
5145 /* Use volatile to protect variables from being clobbered by longjmp. */
5146 struct Lisp_Process
*p
= XPROCESS (proc
);
5148 struct coding_system
*coding
;
5149 struct gcpro gcpro1
;
5150 SIGTYPE (*volatile old_sigpipe
) ();
5155 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
5158 if (! NILP (p
->raw_status_low
))
5160 if (! EQ (p
->status
, Qrun
))
5161 error ("Process %s not running", SDATA (p
->name
));
5162 if (XINT (p
->outfd
) < 0)
5163 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5165 coding
= proc_encode_coding_system
[XINT (p
->outfd
)];
5166 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5168 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5169 || (BUFFERP (object
)
5170 && !NILP (XBUFFER (object
)->enable_multibyte_characters
))
5173 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
5174 /* The coding system for encoding was changed to raw-text
5175 because we sent a unibyte text previously. Now we are
5176 sending a multibyte text, thus we must encode it by the
5177 original coding system specified for the current process. */
5178 setup_coding_system (p
->encode_coding_system
, coding
);
5179 coding
->src_multibyte
= 1;
5183 /* For sending a unibyte text, character code conversion should
5184 not take place but EOL conversion should. So, setup raw-text
5185 or one of the subsidiary if we have not yet done it. */
5186 if (CODING_REQUIRE_ENCODING (coding
))
5188 if (CODING_REQUIRE_FLUSHING (coding
))
5190 /* But, before changing the coding, we must flush out data. */
5191 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5192 send_process (proc
, "", 0, Qt
);
5193 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
5195 setup_coding_system (raw_text_coding_system
5196 (Vlast_coding_system_used
),
5198 coding
->src_multibyte
= 0;
5201 coding
->dst_multibyte
= 0;
5203 if (CODING_REQUIRE_ENCODING (coding
))
5205 coding
->dst_object
= Qt
;
5206 if (BUFFERP (object
))
5208 int from_byte
, from
, to
;
5209 int save_pt
, save_pt_byte
;
5210 struct buffer
*cur
= current_buffer
;
5212 set_buffer_internal (XBUFFER (object
));
5213 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
5215 from_byte
= PTR_BYTE_POS (buf
);
5216 from
= BYTE_TO_CHAR (from_byte
);
5217 to
= BYTE_TO_CHAR (from_byte
+ len
);
5218 TEMP_SET_PT_BOTH (from
, from_byte
);
5219 encode_coding_object (coding
, object
, from
, from_byte
,
5220 to
, from_byte
+ len
, Qt
);
5221 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
5222 set_buffer_internal (cur
);
5224 else if (STRINGP (object
))
5226 encode_coding_string (coding
, object
, 1);
5230 coding
->dst_object
= make_unibyte_string (buf
, len
);
5231 coding
->produced
= len
;
5234 len
= coding
->produced
;
5235 buf
= SDATA (coding
->dst_object
);
5239 vs
= get_vms_process_pointer (p
->pid
);
5241 error ("Could not find this process: %x", p
->pid
);
5242 else if (write_to_vms_process (vs
, buf
, len
))
5246 if (pty_max_bytes
== 0)
5248 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5249 pty_max_bytes
= fpathconf (XFASTINT (p
->outfd
), _PC_MAX_CANON
);
5250 if (pty_max_bytes
< 0)
5251 pty_max_bytes
= 250;
5253 pty_max_bytes
= 250;
5255 /* Deduct one, to leave space for the eof. */
5259 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
5260 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
5261 when returning with longjmp despite being declared volatile. */
5262 if (!setjmp (send_process_frame
))
5264 process_sent_to
= proc
;
5269 /* Decide how much data we can send in one batch.
5270 Long lines need to be split into multiple batches. */
5271 if (!NILP (p
->pty_flag
))
5273 /* Starting this at zero is always correct when not the first
5274 iteration because the previous iteration ended by sending C-d.
5275 It may not be correct for the first iteration
5276 if a partial line was sent in a separate send_process call.
5277 If that proves worth handling, we need to save linepos
5278 in the process object. */
5280 unsigned char *ptr
= (unsigned char *) buf
;
5281 unsigned char *end
= (unsigned char *) buf
+ len
;
5283 /* Scan through this text for a line that is too long. */
5284 while (ptr
!= end
&& linepos
< pty_max_bytes
)
5292 /* If we found one, break the line there
5293 and put in a C-d to force the buffer through. */
5297 /* Send this batch, using one or more write calls. */
5300 int outfd
= XINT (p
->outfd
);
5301 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
5302 #ifdef DATAGRAM_SOCKETS
5303 if (DATAGRAM_CHAN_P (outfd
))
5305 rv
= sendto (outfd
, (char *) buf
, this,
5306 0, datagram_address
[outfd
].sa
,
5307 datagram_address
[outfd
].len
);
5308 if (rv
< 0 && errno
== EMSGSIZE
)
5310 signal (SIGPIPE
, old_sigpipe
);
5311 report_file_error ("sending datagram",
5312 Fcons (proc
, Qnil
));
5318 rv
= emacs_write (outfd
, (char *) buf
, this);
5319 #ifdef ADAPTIVE_READ_BUFFERING
5320 if (XINT (p
->read_output_delay
) > 0
5321 && EQ (p
->adaptive_read_buffering
, Qt
))
5323 XSETFASTINT (p
->read_output_delay
, 0);
5324 process_output_delay_count
--;
5325 p
->read_output_skip
= Qnil
;
5329 signal (SIGPIPE
, old_sigpipe
);
5335 || errno
== EWOULDBLOCK
5341 /* Buffer is full. Wait, accepting input;
5342 that may allow the program
5343 to finish doing output and read more. */
5347 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5348 /* A gross hack to work around a bug in FreeBSD.
5349 In the following sequence, read(2) returns
5353 write(2) 954 bytes, get EAGAIN
5354 read(2) 1024 bytes in process_read_output
5355 read(2) 11 bytes in process_read_output
5357 That is, read(2) returns more bytes than have
5358 ever been written successfully. The 1033 bytes
5359 read are the 1022 bytes written successfully
5360 after processing (for example with CRs added if
5361 the terminal is set up that way which it is
5362 here). The same bytes will be seen again in a
5363 later read(2), without the CRs. */
5365 if (errno
== EAGAIN
)
5368 ioctl (XINT (p
->outfd
), TIOCFLUSH
, &flags
);
5370 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5372 /* Running filters might relocate buffers or strings.
5373 Arrange to relocate BUF. */
5374 if (BUFFERP (object
))
5375 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
5376 else if (STRINGP (object
))
5377 offset
= buf
- SDATA (object
);
5379 #ifdef EMACS_HAS_USECS
5380 wait_reading_process_output (0, 20000, 0, 0, Qnil
, NULL
, 0);
5382 wait_reading_process_output (1, 0, 0, 0, Qnil
, NULL
, 0);
5385 if (BUFFERP (object
))
5386 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
5387 else if (STRINGP (object
))
5388 buf
= offset
+ SDATA (object
);
5393 /* This is a real error. */
5394 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5401 /* If we sent just part of the string, put in an EOF
5402 to force it through, before we send the rest. */
5404 Fprocess_send_eof (proc
);
5407 #endif /* not VMS */
5410 signal (SIGPIPE
, old_sigpipe
);
5412 proc
= process_sent_to
;
5413 p
= XPROCESS (proc
);
5415 p
->raw_status_low
= Qnil
;
5416 p
->raw_status_high
= Qnil
;
5417 p
->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5418 XSETINT (p
->tick
, ++process_tick
);
5419 deactivate_process (proc
);
5421 error ("Error writing to process %s; closed it", SDATA (p
->name
));
5423 error ("SIGPIPE raised on process %s; closed it", SDATA (p
->name
));
5430 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5432 doc
: /* Send current contents of region as input to PROCESS.
5433 PROCESS may be a process, a buffer, the name of a process or buffer, or
5434 nil, indicating the current buffer's process.
5435 Called from program, takes three arguments, PROCESS, START and END.
5436 If the region is more than 500 characters long,
5437 it is sent in several bunches. This may happen even for shorter regions.
5438 Output from processes can arrive in between bunches. */)
5439 (process
, start
, end
)
5440 Lisp_Object process
, start
, end
;
5445 proc
= get_process (process
);
5446 validate_region (&start
, &end
);
5448 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5449 move_gap (XINT (start
));
5451 start1
= CHAR_TO_BYTE (XINT (start
));
5452 end1
= CHAR_TO_BYTE (XINT (end
));
5453 send_process (proc
, BYTE_POS_ADDR (start1
), end1
- start1
,
5454 Fcurrent_buffer ());
5459 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5461 doc
: /* Send PROCESS the contents of STRING as input.
5462 PROCESS may be a process, a buffer, the name of a process or buffer, or
5463 nil, indicating the current buffer's process.
5464 If STRING is more than 500 characters long,
5465 it is sent in several bunches. This may happen even for shorter strings.
5466 Output from processes can arrive in between bunches. */)
5468 Lisp_Object process
, string
;
5471 CHECK_STRING (string
);
5472 proc
= get_process (process
);
5473 send_process (proc
, SDATA (string
),
5474 SBYTES (string
), string
);
5478 /* Return the foreground process group for the tty/pty that
5479 the process P uses. */
5481 emacs_get_tty_pgrp (p
)
5482 struct Lisp_Process
*p
;
5487 if (ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5490 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5491 master side. Try the slave side. */
5492 fd
= emacs_open (XSTRING (p
->tty_name
)->data
, O_RDONLY
, 0);
5496 ioctl (fd
, TIOCGPGRP
, &gid
);
5500 #endif /* defined (TIOCGPGRP ) */
5505 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5506 Sprocess_running_child_p
, 0, 1, 0,
5507 doc
: /* Return t if PROCESS has given the terminal to a child.
5508 If the operating system does not make it possible to find out,
5509 return t unconditionally. */)
5511 Lisp_Object process
;
5513 /* Initialize in case ioctl doesn't exist or gives an error,
5514 in a way that will cause returning t. */
5517 struct Lisp_Process
*p
;
5519 proc
= get_process (process
);
5520 p
= XPROCESS (proc
);
5522 if (!EQ (p
->childp
, Qt
))
5523 error ("Process %s is not a subprocess",
5525 if (XINT (p
->infd
) < 0)
5526 error ("Process %s is not active",
5529 gid
= emacs_get_tty_pgrp (p
);
5531 if (gid
== XFASTINT (p
->pid
))
5536 /* send a signal number SIGNO to PROCESS.
5537 If CURRENT_GROUP is t, that means send to the process group
5538 that currently owns the terminal being used to communicate with PROCESS.
5539 This is used for various commands in shell mode.
5540 If CURRENT_GROUP is lambda, that means send to the process group
5541 that currently owns the terminal, but only if it is NOT the shell itself.
5543 If NOMSG is zero, insert signal-announcements into process's buffers
5546 If we can, we try to signal PROCESS by sending control characters
5547 down the pty. This allows us to signal inferiors who have changed
5548 their uid, for which killpg would return an EPERM error. */
5551 process_send_signal (process
, signo
, current_group
, nomsg
)
5552 Lisp_Object process
;
5554 Lisp_Object current_group
;
5558 register struct Lisp_Process
*p
;
5562 proc
= get_process (process
);
5563 p
= XPROCESS (proc
);
5565 if (!EQ (p
->childp
, Qt
))
5566 error ("Process %s is not a subprocess",
5568 if (XINT (p
->infd
) < 0)
5569 error ("Process %s is not active",
5572 if (NILP (p
->pty_flag
))
5573 current_group
= Qnil
;
5575 /* If we are using pgrps, get a pgrp number and make it negative. */
5576 if (NILP (current_group
))
5577 /* Send the signal to the shell's process group. */
5578 gid
= XFASTINT (p
->pid
);
5581 #ifdef SIGNALS_VIA_CHARACTERS
5582 /* If possible, send signals to the entire pgrp
5583 by sending an input character to it. */
5585 /* TERMIOS is the latest and bestest, and seems most likely to
5586 work. If the system has it, use it. */
5589 cc_t
*sig_char
= NULL
;
5591 tcgetattr (XINT (p
->infd
), &t
);
5596 sig_char
= &t
.c_cc
[VINTR
];
5600 sig_char
= &t
.c_cc
[VQUIT
];
5604 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5605 sig_char
= &t
.c_cc
[VSWTCH
];
5607 sig_char
= &t
.c_cc
[VSUSP
];
5612 if (sig_char
&& *sig_char
!= CDISABLE
)
5614 send_process (proc
, sig_char
, 1, Qnil
);
5617 /* If we can't send the signal with a character,
5618 fall through and send it another way. */
5619 #else /* ! HAVE_TERMIOS */
5621 /* On Berkeley descendants, the following IOCTL's retrieve the
5622 current control characters. */
5623 #if defined (TIOCGLTC) && defined (TIOCGETC)
5631 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
5632 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
5635 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
5636 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
5640 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
5641 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
5643 #endif /* ! defined (SIGTSTP) */
5646 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
5648 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
5655 ioctl (XINT (p
->infd
), TCGETA
, &t
);
5656 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
5659 ioctl (XINT (p
->infd
), TCGETA
, &t
);
5660 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
5664 ioctl (XINT (p
->infd
), TCGETA
, &t
);
5665 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
5667 #endif /* ! defined (SIGTSTP) */
5669 #else /* ! defined (TCGETA) */
5670 Your configuration files are messed up
.
5671 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
5672 you'd better be using one of the alternatives above! */
5673 #endif /* ! defined (TCGETA) */
5674 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
5675 /* In this case, the code above should alway returns. */
5677 #endif /* ! defined HAVE_TERMIOS */
5679 /* The code above may fall through if it can't
5680 handle the signal. */
5681 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5684 /* Get the current pgrp using the tty itself, if we have that.
5685 Otherwise, use the pty to get the pgrp.
5686 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5687 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5688 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5689 His patch indicates that if TIOCGPGRP returns an error, then
5690 we should just assume that p->pid is also the process group id. */
5692 gid
= emacs_get_tty_pgrp (p
);
5695 /* If we can't get the information, assume
5696 the shell owns the tty. */
5697 gid
= XFASTINT (p
->pid
);
5699 /* It is not clear whether anything really can set GID to -1.
5700 Perhaps on some system one of those ioctls can or could do so.
5701 Or perhaps this is vestigial. */
5704 #else /* ! defined (TIOCGPGRP ) */
5705 /* Can't select pgrps on this system, so we know that
5706 the child itself heads the pgrp. */
5707 gid
= XFASTINT (p
->pid
);
5708 #endif /* ! defined (TIOCGPGRP ) */
5710 /* If current_group is lambda, and the shell owns the terminal,
5711 don't send any signal. */
5712 if (EQ (current_group
, Qlambda
) && gid
== XFASTINT (p
->pid
))
5720 p
->raw_status_low
= Qnil
;
5721 p
->raw_status_high
= Qnil
;
5723 XSETINT (p
->tick
, ++process_tick
);
5727 #endif /* ! defined (SIGCONT) */
5730 send_process (proc
, "\003", 1, Qnil
); /* ^C */
5735 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
5740 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
5743 flush_pending_output (XINT (p
->infd
));
5747 /* If we don't have process groups, send the signal to the immediate
5748 subprocess. That isn't really right, but it's better than any
5749 obvious alternative. */
5752 kill (XFASTINT (p
->pid
), signo
);
5756 /* gid may be a pid, or minus a pgrp's number */
5758 if (!NILP (current_group
))
5760 if (ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
) == -1)
5761 EMACS_KILLPG (gid
, signo
);
5765 gid
= - XFASTINT (p
->pid
);
5768 #else /* ! defined (TIOCSIGSEND) */
5769 EMACS_KILLPG (gid
, signo
);
5770 #endif /* ! defined (TIOCSIGSEND) */
5773 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
5774 doc
: /* Interrupt process PROCESS.
5775 PROCESS may be a process, a buffer, or the name of a process or buffer.
5776 No arg or nil means current buffer's process.
5777 Second arg CURRENT-GROUP non-nil means send signal to
5778 the current process-group of the process's controlling terminal
5779 rather than to the process's own process group.
5780 If the process is a shell, this means interrupt current subjob
5781 rather than the shell.
5783 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
5784 don't send the signal. */)
5785 (process
, current_group
)
5786 Lisp_Object process
, current_group
;
5788 process_send_signal (process
, SIGINT
, current_group
, 0);
5792 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
5793 doc
: /* Kill process PROCESS. May be process or name of one.
5794 See function `interrupt-process' for more details on usage. */)
5795 (process
, current_group
)
5796 Lisp_Object process
, current_group
;
5798 process_send_signal (process
, SIGKILL
, current_group
, 0);
5802 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
5803 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
5804 See function `interrupt-process' for more details on usage. */)
5805 (process
, current_group
)
5806 Lisp_Object process
, current_group
;
5808 process_send_signal (process
, SIGQUIT
, current_group
, 0);
5812 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
5813 doc
: /* Stop process PROCESS. May be process or name of one.
5814 See function `interrupt-process' for more details on usage.
5815 If PROCESS is a network process, inhibit handling of incoming traffic. */)
5816 (process
, current_group
)
5817 Lisp_Object process
, current_group
;
5820 if (PROCESSP (process
) && NETCONN_P (process
))
5822 struct Lisp_Process
*p
;
5824 p
= XPROCESS (process
);
5825 if (NILP (p
->command
)
5826 && XINT (p
->infd
) >= 0)
5828 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
5829 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
5836 error ("No SIGTSTP support");
5838 process_send_signal (process
, SIGTSTP
, current_group
, 0);
5843 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
5844 doc
: /* Continue process PROCESS. May be process or name of one.
5845 See function `interrupt-process' for more details on usage.
5846 If PROCESS is a network process, resume handling of incoming traffic. */)
5847 (process
, current_group
)
5848 Lisp_Object process
, current_group
;
5851 if (PROCESSP (process
) && NETCONN_P (process
))
5853 struct Lisp_Process
*p
;
5855 p
= XPROCESS (process
);
5856 if (EQ (p
->command
, Qt
)
5857 && XINT (p
->infd
) >= 0
5858 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
5860 FD_SET (XINT (p
->infd
), &input_wait_mask
);
5861 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
5868 process_send_signal (process
, SIGCONT
, current_group
, 0);
5870 error ("No SIGCONT support");
5875 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
5876 2, 2, "sProcess (name or number): \nnSignal code: ",
5877 doc
: /* Send PROCESS the signal with code SIGCODE.
5878 PROCESS may also be an integer specifying the process id of the
5879 process to signal; in this case, the process need not be a child of
5881 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
5883 Lisp_Object process
, sigcode
;
5887 if (INTEGERP (process
))
5893 if (STRINGP (process
))
5896 if (tem
= Fget_process (process
), NILP (tem
))
5898 pid
= Fstring_to_number (process
, make_number (10));
5899 if (XINT (pid
) != 0)
5905 process
= get_process (process
);
5910 CHECK_PROCESS (process
);
5911 pid
= XPROCESS (process
)->pid
;
5912 if (!INTEGERP (pid
) || XINT (pid
) <= 0)
5913 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
5917 #define handle_signal(NAME, VALUE) \
5918 else if (!strcmp (name, NAME)) \
5919 XSETINT (sigcode, VALUE)
5921 if (INTEGERP (sigcode
))
5925 unsigned char *name
;
5927 CHECK_SYMBOL (sigcode
);
5928 name
= SDATA (SYMBOL_NAME (sigcode
));
5933 handle_signal ("SIGHUP", SIGHUP
);
5936 handle_signal ("SIGINT", SIGINT
);
5939 handle_signal ("SIGQUIT", SIGQUIT
);
5942 handle_signal ("SIGILL", SIGILL
);
5945 handle_signal ("SIGABRT", SIGABRT
);
5948 handle_signal ("SIGEMT", SIGEMT
);
5951 handle_signal ("SIGKILL", SIGKILL
);
5954 handle_signal ("SIGFPE", SIGFPE
);
5957 handle_signal ("SIGBUS", SIGBUS
);
5960 handle_signal ("SIGSEGV", SIGSEGV
);
5963 handle_signal ("SIGSYS", SIGSYS
);
5966 handle_signal ("SIGPIPE", SIGPIPE
);
5969 handle_signal ("SIGALRM", SIGALRM
);
5972 handle_signal ("SIGTERM", SIGTERM
);
5975 handle_signal ("SIGURG", SIGURG
);
5978 handle_signal ("SIGSTOP", SIGSTOP
);
5981 handle_signal ("SIGTSTP", SIGTSTP
);
5984 handle_signal ("SIGCONT", SIGCONT
);
5987 handle_signal ("SIGCHLD", SIGCHLD
);
5990 handle_signal ("SIGTTIN", SIGTTIN
);
5993 handle_signal ("SIGTTOU", SIGTTOU
);
5996 handle_signal ("SIGIO", SIGIO
);
5999 handle_signal ("SIGXCPU", SIGXCPU
);
6002 handle_signal ("SIGXFSZ", SIGXFSZ
);
6005 handle_signal ("SIGVTALRM", SIGVTALRM
);
6008 handle_signal ("SIGPROF", SIGPROF
);
6011 handle_signal ("SIGWINCH", SIGWINCH
);
6014 handle_signal ("SIGINFO", SIGINFO
);
6017 handle_signal ("SIGUSR1", SIGUSR1
);
6020 handle_signal ("SIGUSR2", SIGUSR2
);
6023 error ("Undefined signal name %s", name
);
6026 #undef handle_signal
6028 return make_number (kill (XINT (pid
), XINT (sigcode
)));
6031 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6032 doc
: /* Make PROCESS see end-of-file in its input.
6033 EOF comes after any text already sent to it.
6034 PROCESS may be a process, a buffer, the name of a process or buffer, or
6035 nil, indicating the current buffer's process.
6036 If PROCESS is a network connection, or is a process communicating
6037 through a pipe (as opposed to a pty), then you cannot send any more
6038 text to PROCESS after you call this function. */)
6040 Lisp_Object process
;
6043 struct coding_system
*coding
;
6045 if (DATAGRAM_CONN_P (process
))
6048 proc
= get_process (process
);
6049 coding
= proc_encode_coding_system
[XINT (XPROCESS (proc
)->outfd
)];
6051 /* Make sure the process is really alive. */
6052 if (! NILP (XPROCESS (proc
)->raw_status_low
))
6053 update_status (XPROCESS (proc
));
6054 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6055 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6057 if (CODING_REQUIRE_FLUSHING (coding
))
6059 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6060 send_process (proc
, "", 0, Qnil
);
6064 send_process (proc
, "\032", 1, Qnil
); /* ^z */
6066 if (!NILP (XPROCESS (proc
)->pty_flag
))
6067 send_process (proc
, "\004", 1, Qnil
);
6070 int old_outfd
, new_outfd
;
6072 #ifdef HAVE_SHUTDOWN
6073 /* If this is a network connection, or socketpair is used
6074 for communication with the subprocess, call shutdown to cause EOF.
6075 (In some old system, shutdown to socketpair doesn't work.
6076 Then we just can't win.) */
6077 if (NILP (XPROCESS (proc
)->pid
)
6078 || XINT (XPROCESS (proc
)->outfd
) == XINT (XPROCESS (proc
)->infd
))
6079 shutdown (XINT (XPROCESS (proc
)->outfd
), 1);
6080 /* In case of socketpair, outfd == infd, so don't close it. */
6081 if (XINT (XPROCESS (proc
)->outfd
) != XINT (XPROCESS (proc
)->infd
))
6082 emacs_close (XINT (XPROCESS (proc
)->outfd
));
6083 #else /* not HAVE_SHUTDOWN */
6084 emacs_close (XINT (XPROCESS (proc
)->outfd
));
6085 #endif /* not HAVE_SHUTDOWN */
6086 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6087 old_outfd
= XINT (XPROCESS (proc
)->outfd
);
6089 if (!proc_encode_coding_system
[new_outfd
])
6090 proc_encode_coding_system
[new_outfd
]
6091 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6092 bcopy (proc_encode_coding_system
[old_outfd
],
6093 proc_encode_coding_system
[new_outfd
],
6094 sizeof (struct coding_system
));
6095 bzero (proc_encode_coding_system
[old_outfd
],
6096 sizeof (struct coding_system
));
6098 XSETINT (XPROCESS (proc
)->outfd
, new_outfd
);
6104 /* Kill all processes associated with `buffer'.
6105 If `buffer' is nil, kill all processes */
6108 kill_buffer_processes (buffer
)
6111 Lisp_Object tail
, proc
;
6113 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6115 proc
= XCDR (XCAR (tail
));
6116 if (GC_PROCESSP (proc
)
6117 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
6119 if (NETCONN_P (proc
))
6120 Fdelete_process (proc
);
6121 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
6122 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
6127 /* On receipt of a signal that a child status has changed, loop asking
6128 about children with changed statuses until the system says there
6131 All we do is change the status; we do not run sentinels or print
6132 notifications. That is saved for the next time keyboard input is
6133 done, in order to avoid timing errors.
6135 ** WARNING: this can be called during garbage collection.
6136 Therefore, it must not be fooled by the presence of mark bits in
6139 ** USG WARNING: Although it is not obvious from the documentation
6140 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6141 signal() before executing at least one wait(), otherwise the
6142 handler will be called again, resulting in an infinite loop. The
6143 relevant portion of the documentation reads "SIGCLD signals will be
6144 queued and the signal-catching function will be continually
6145 reentered until the queue is empty". Invoking signal() causes the
6146 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6149 ** Malloc WARNING: This should never call malloc either directly or
6150 indirectly; if it does, that is a bug */
6153 sigchld_handler (signo
)
6156 int old_errno
= errno
;
6158 register struct Lisp_Process
*p
;
6159 extern EMACS_TIME
*input_available_clear_time
;
6161 SIGNAL_THREAD_CHECK (signo
);
6165 sigheld
|= sigbit (SIGCHLD
);
6177 #endif /* no WUNTRACED */
6178 /* Keep trying to get a status until we get a definitive result. */
6182 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
6184 while (pid
< 0 && errno
== EINTR
);
6188 /* PID == 0 means no processes found, PID == -1 means a real
6189 failure. We have done all our job, so return. */
6191 /* USG systems forget handlers when they are used;
6192 must reestablish each time */
6193 #if defined (USG) && !defined (POSIX_SIGNALS)
6194 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
6197 sigheld
&= ~sigbit (SIGCHLD
);
6205 #endif /* no WNOHANG */
6207 /* Find the process that signaled us, and record its status. */
6210 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6212 proc
= XCDR (XCAR (tail
));
6213 p
= XPROCESS (proc
);
6214 if (GC_EQ (p
->childp
, Qt
) && XINT (p
->pid
) == pid
)
6219 /* Look for an asynchronous process whose pid hasn't been filled
6222 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6224 proc
= XCDR (XCAR (tail
));
6225 p
= XPROCESS (proc
);
6226 if (GC_INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
6231 /* Change the status of the process that was found. */
6234 union { int i
; WAITTYPE wt
; } u
;
6235 int clear_desc_flag
= 0;
6237 XSETINT (p
->tick
, ++process_tick
);
6239 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
6240 XSETINT (p
->raw_status_high
, u
.i
>> 16);
6242 /* If process has terminated, stop waiting for its output. */
6243 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6244 && XINT (p
->infd
) >= 0)
6245 clear_desc_flag
= 1;
6247 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6248 if (clear_desc_flag
)
6250 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
6251 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
6254 /* Tell wait_reading_process_output that it needs to wake up and
6256 if (input_available_clear_time
)
6257 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6260 /* There was no asynchronous process found for that id. Check
6261 if we have a synchronous process. */
6264 synch_process_alive
= 0;
6266 /* Report the status of the synchronous process. */
6268 synch_process_retcode
= WRETCODE (w
);
6269 else if (WIFSIGNALED (w
))
6270 synch_process_termsig
= WTERMSIG (w
);
6272 /* Tell wait_reading_process_output that it needs to wake up and
6274 if (input_available_clear_time
)
6275 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6278 /* On some systems, we must return right away.
6279 If any more processes want to signal us, we will
6281 Otherwise (on systems that have WNOHANG), loop around
6282 to use up all the processes that have something to tell us. */
6283 #if (defined WINDOWSNT \
6284 || (defined USG && !defined GNU_LINUX \
6285 && !(defined HPUX && defined WNOHANG)))
6286 #if defined (USG) && ! defined (POSIX_SIGNALS)
6287 signal (signo
, sigchld_handler
);
6291 #endif /* USG, but not HPUX with WNOHANG */
6297 exec_sentinel_unwind (data
)
6300 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
6305 exec_sentinel_error_handler (error
)
6308 cmd_error_internal (error
, "error in process sentinel: ");
6310 update_echo_area ();
6311 Fsleep_for (make_number (2), Qnil
);
6316 exec_sentinel (proc
, reason
)
6317 Lisp_Object proc
, reason
;
6319 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
6320 register struct Lisp_Process
*p
= XPROCESS (proc
);
6321 int count
= SPECPDL_INDEX ();
6322 int outer_running_asynch_code
= running_asynch_code
;
6323 int waiting
= waiting_for_user_input_p
;
6325 /* No need to gcpro these, because all we do with them later
6326 is test them for EQness, and none of them should be a string. */
6327 odeactivate
= Vdeactivate_mark
;
6328 XSETBUFFER (obuffer
, current_buffer
);
6329 okeymap
= current_buffer
->keymap
;
6331 sentinel
= p
->sentinel
;
6332 if (NILP (sentinel
))
6335 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6336 assure that it gets restored no matter how the sentinel exits. */
6338 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6339 /* Inhibit quit so that random quits don't screw up a running filter. */
6340 specbind (Qinhibit_quit
, Qt
);
6341 specbind (Qlast_nonmenu_event
, Qt
);
6343 /* In case we get recursively called,
6344 and we already saved the match data nonrecursively,
6345 save the same match data in safely recursive fashion. */
6346 if (outer_running_asynch_code
)
6349 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6350 restore_search_regs ();
6351 record_unwind_save_match_data ();
6352 Fset_match_data (tem
, Qt
);
6355 /* For speed, if a search happens within this code,
6356 save the match data in a special nonrecursive fashion. */
6357 running_asynch_code
= 1;
6359 internal_condition_case_1 (read_process_output_call
,
6361 Fcons (proc
, Fcons (reason
, Qnil
))),
6362 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6363 exec_sentinel_error_handler
);
6365 /* If we saved the match data nonrecursively, restore it now. */
6366 restore_search_regs ();
6367 running_asynch_code
= outer_running_asynch_code
;
6369 Vdeactivate_mark
= odeactivate
;
6371 /* Restore waiting_for_user_input_p as it was
6372 when we were called, in case the filter clobbered it. */
6373 waiting_for_user_input_p
= waiting
;
6376 if (! EQ (Fcurrent_buffer (), obuffer
)
6377 || ! EQ (current_buffer
->keymap
, okeymap
))
6379 /* But do it only if the caller is actually going to read events.
6380 Otherwise there's no need to make him wake up, and it could
6381 cause trouble (for example it would make Fsit_for return). */
6382 if (waiting_for_user_input_p
== -1)
6383 record_asynch_buffer_change ();
6385 unbind_to (count
, Qnil
);
6388 /* Report all recent events of a change in process status
6389 (either run the sentinel or output a message).
6390 This is usually done while Emacs is waiting for keyboard input
6391 but can be done at other times. */
6396 register Lisp_Object proc
, buffer
;
6397 Lisp_Object tail
, msg
;
6398 struct gcpro gcpro1
, gcpro2
;
6402 /* We need to gcpro tail; if read_process_output calls a filter
6403 which deletes a process and removes the cons to which tail points
6404 from Vprocess_alist, and then causes a GC, tail is an unprotected
6408 /* Set this now, so that if new processes are created by sentinels
6409 that we run, we get called again to handle their status changes. */
6410 update_tick
= process_tick
;
6412 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
6415 register struct Lisp_Process
*p
;
6417 proc
= Fcdr (Fcar (tail
));
6418 p
= XPROCESS (proc
);
6420 if (XINT (p
->tick
) != XINT (p
->update_tick
))
6422 XSETINT (p
->update_tick
, XINT (p
->tick
));
6424 /* If process is still active, read any output that remains. */
6425 while (! EQ (p
->filter
, Qt
)
6426 && ! EQ (p
->status
, Qconnect
)
6427 && ! EQ (p
->status
, Qlisten
)
6428 && ! EQ (p
->command
, Qt
) /* Network process not stopped. */
6429 && XINT (p
->infd
) >= 0
6430 && read_process_output (proc
, XINT (p
->infd
)) > 0);
6434 /* Get the text to use for the message. */
6435 if (!NILP (p
->raw_status_low
))
6437 msg
= status_message (p
);
6439 /* If process is terminated, deactivate it or delete it. */
6441 if (CONSP (p
->status
))
6442 symbol
= XCAR (p
->status
);
6444 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6445 || EQ (symbol
, Qclosed
))
6447 if (delete_exited_processes
)
6448 remove_process (proc
);
6450 deactivate_process (proc
);
6453 /* The actions above may have further incremented p->tick.
6454 So set p->update_tick again
6455 so that an error in the sentinel will not cause
6456 this code to be run again. */
6457 XSETINT (p
->update_tick
, XINT (p
->tick
));
6458 /* Now output the message suitably. */
6459 if (!NILP (p
->sentinel
))
6460 exec_sentinel (proc
, msg
);
6461 /* Don't bother with a message in the buffer
6462 when a process becomes runnable. */
6463 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6465 Lisp_Object ro
, tem
;
6466 struct buffer
*old
= current_buffer
;
6467 int opoint
, opoint_byte
;
6468 int before
, before_byte
;
6470 ro
= XBUFFER (buffer
)->read_only
;
6472 /* Avoid error if buffer is deleted
6473 (probably that's why the process is dead, too) */
6474 if (NILP (XBUFFER (buffer
)->name
))
6476 Fset_buffer (buffer
);
6479 opoint_byte
= PT_BYTE
;
6480 /* Insert new output into buffer
6481 at the current end-of-output marker,
6482 thus preserving logical ordering of input and output. */
6483 if (XMARKER (p
->mark
)->buffer
)
6484 Fgoto_char (p
->mark
);
6486 SET_PT_BOTH (ZV
, ZV_BYTE
);
6489 before_byte
= PT_BYTE
;
6491 tem
= current_buffer
->read_only
;
6492 current_buffer
->read_only
= Qnil
;
6493 insert_string ("\nProcess ");
6494 Finsert (1, &p
->name
);
6495 insert_string (" ");
6497 current_buffer
->read_only
= tem
;
6498 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6500 if (opoint
>= before
)
6501 SET_PT_BOTH (opoint
+ (PT
- before
),
6502 opoint_byte
+ (PT_BYTE
- before_byte
));
6504 SET_PT_BOTH (opoint
, opoint_byte
);
6506 set_buffer_internal (old
);
6511 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6512 redisplay_preserve_echo_area (13);
6518 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6519 Sset_process_coding_system
, 1, 3, 0,
6520 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6521 DECODING will be used to decode subprocess output and ENCODING to
6522 encode subprocess input. */)
6523 (process
, decoding
, encoding
)
6524 register Lisp_Object process
, decoding
, encoding
;
6526 register struct Lisp_Process
*p
;
6528 CHECK_PROCESS (process
);
6529 p
= XPROCESS (process
);
6530 if (XINT (p
->infd
) < 0)
6531 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6532 if (XINT (p
->outfd
) < 0)
6533 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6534 Fcheck_coding_system (decoding
);
6535 Fcheck_coding_system (encoding
);
6537 p
->decode_coding_system
= decoding
;
6538 p
->encode_coding_system
= encoding
;
6539 setup_process_coding_systems (process
);
6544 DEFUN ("process-coding-system",
6545 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6546 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6548 register Lisp_Object process
;
6550 CHECK_PROCESS (process
);
6551 return Fcons (XPROCESS (process
)->decode_coding_system
,
6552 XPROCESS (process
)->encode_coding_system
);
6555 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6556 Sset_process_filter_multibyte
, 2, 2, 0,
6557 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6558 If FLAG is non-nil, the filter is given multibyte strings.
6559 If FLAG is nil, the filter is given unibyte strings. In this case,
6560 all character code conversion except for end-of-line conversion is
6563 Lisp_Object process
, flag
;
6565 register struct Lisp_Process
*p
;
6567 CHECK_PROCESS (process
);
6568 p
= XPROCESS (process
);
6569 p
->filter_multibyte
= flag
;
6570 setup_process_coding_systems (process
);
6575 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6576 Sprocess_filter_multibyte_p
, 1, 1, 0,
6577 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6579 Lisp_Object process
;
6581 register struct Lisp_Process
*p
;
6583 CHECK_PROCESS (process
);
6584 p
= XPROCESS (process
);
6586 return (NILP (p
->filter_multibyte
) ? Qnil
: Qt
);
6591 /* The first time this is called, assume keyboard input comes from DESC
6592 instead of from where we used to expect it.
6593 Subsequent calls mean assume input keyboard can come from DESC
6594 in addition to other places. */
6596 static int add_keyboard_wait_descriptor_called_flag
;
6599 add_keyboard_wait_descriptor (desc
)
6602 if (! add_keyboard_wait_descriptor_called_flag
)
6603 FD_CLR (0, &input_wait_mask
);
6604 add_keyboard_wait_descriptor_called_flag
= 1;
6605 FD_SET (desc
, &input_wait_mask
);
6606 FD_SET (desc
, &non_process_wait_mask
);
6607 if (desc
> max_keyboard_desc
)
6608 max_keyboard_desc
= desc
;
6611 /* From now on, do not expect DESC to give keyboard input. */
6614 delete_keyboard_wait_descriptor (desc
)
6618 int lim
= max_keyboard_desc
;
6620 FD_CLR (desc
, &input_wait_mask
);
6621 FD_CLR (desc
, &non_process_wait_mask
);
6623 if (desc
== max_keyboard_desc
)
6624 for (fd
= 0; fd
< lim
; fd
++)
6625 if (FD_ISSET (fd
, &input_wait_mask
)
6626 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6627 max_keyboard_desc
= fd
;
6630 /* Return nonzero if *MASK has a bit set
6631 that corresponds to one of the keyboard input descriptors. */
6634 keyboard_bit_set (mask
)
6639 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
6640 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6641 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6654 if (! noninteractive
|| initialized
)
6656 signal (SIGCHLD
, sigchld_handler
);
6659 FD_ZERO (&input_wait_mask
);
6660 FD_ZERO (&non_keyboard_wait_mask
);
6661 FD_ZERO (&non_process_wait_mask
);
6662 max_process_desc
= 0;
6664 #ifdef NON_BLOCKING_CONNECT
6665 FD_ZERO (&connect_wait_mask
);
6666 num_pending_connects
= 0;
6669 #ifdef ADAPTIVE_READ_BUFFERING
6670 process_output_delay_count
= 0;
6671 process_output_skip
= 0;
6674 FD_SET (0, &input_wait_mask
);
6676 Vprocess_alist
= Qnil
;
6677 for (i
= 0; i
< MAXDESC
; i
++)
6679 chan_process
[i
] = Qnil
;
6680 proc_buffered_char
[i
] = -1;
6682 bzero (proc_decode_coding_system
, sizeof proc_decode_coding_system
);
6683 bzero (proc_encode_coding_system
, sizeof proc_encode_coding_system
);
6684 #ifdef DATAGRAM_SOCKETS
6685 bzero (datagram_address
, sizeof datagram_address
);
6690 Lisp_Object subfeatures
= Qnil
;
6691 struct socket_options
*sopt
;
6693 #define ADD_SUBFEATURE(key, val) \
6694 subfeatures = Fcons (Fcons (key, Fcons (val, Qnil)), subfeatures)
6696 #ifdef NON_BLOCKING_CONNECT
6697 ADD_SUBFEATURE (QCnowait
, Qt
);
6699 #ifdef DATAGRAM_SOCKETS
6700 ADD_SUBFEATURE (QCtype
, Qdatagram
);
6702 #ifdef HAVE_LOCAL_SOCKETS
6703 ADD_SUBFEATURE (QCfamily
, Qlocal
);
6705 #ifdef HAVE_GETSOCKNAME
6706 ADD_SUBFEATURE (QCservice
, Qt
);
6708 #if !defined(TERM) && (defined(O_NONBLOCK) || defined(O_NDELAY))
6709 ADD_SUBFEATURE (QCserver
, Qt
);
6712 for (sopt
= socket_options
; sopt
->name
; sopt
++)
6713 subfeatures
= Fcons (intern (sopt
->name
), subfeatures
);
6715 Fprovide (intern ("make-network-process"), subfeatures
);
6717 #endif /* HAVE_SOCKETS */
6719 #if defined (DARWIN) || defined (MAC_OSX)
6720 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
6721 processes. As such, we only change the default value. */
6724 char *release
= get_operating_system_release();
6725 if (!release
|| !release
[0] || (release
[0] < MIN_PTY_KERNEL_VERSION
6726 && release
[1] == '.')) {
6727 Vprocess_connection_type
= Qnil
;
6736 Qprocessp
= intern ("processp");
6737 staticpro (&Qprocessp
);
6738 Qrun
= intern ("run");
6740 Qstop
= intern ("stop");
6742 Qsignal
= intern ("signal");
6743 staticpro (&Qsignal
);
6745 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
6748 Qexit = intern ("exit");
6749 staticpro (&Qexit); */
6751 Qopen
= intern ("open");
6753 Qclosed
= intern ("closed");
6754 staticpro (&Qclosed
);
6755 Qconnect
= intern ("connect");
6756 staticpro (&Qconnect
);
6757 Qfailed
= intern ("failed");
6758 staticpro (&Qfailed
);
6759 Qlisten
= intern ("listen");
6760 staticpro (&Qlisten
);
6761 Qlocal
= intern ("local");
6762 staticpro (&Qlocal
);
6763 Qdatagram
= intern ("datagram");
6764 staticpro (&Qdatagram
);
6766 QCname
= intern (":name");
6767 staticpro (&QCname
);
6768 QCbuffer
= intern (":buffer");
6769 staticpro (&QCbuffer
);
6770 QChost
= intern (":host");
6771 staticpro (&QChost
);
6772 QCservice
= intern (":service");
6773 staticpro (&QCservice
);
6774 QCtype
= intern (":type");
6775 staticpro (&QCtype
);
6776 QClocal
= intern (":local");
6777 staticpro (&QClocal
);
6778 QCremote
= intern (":remote");
6779 staticpro (&QCremote
);
6780 QCcoding
= intern (":coding");
6781 staticpro (&QCcoding
);
6782 QCserver
= intern (":server");
6783 staticpro (&QCserver
);
6784 QCnowait
= intern (":nowait");
6785 staticpro (&QCnowait
);
6786 QCsentinel
= intern (":sentinel");
6787 staticpro (&QCsentinel
);
6788 QClog
= intern (":log");
6790 QCnoquery
= intern (":noquery");
6791 staticpro (&QCnoquery
);
6792 QCstop
= intern (":stop");
6793 staticpro (&QCstop
);
6794 QCoptions
= intern (":options");
6795 staticpro (&QCoptions
);
6796 QCplist
= intern (":plist");
6797 staticpro (&QCplist
);
6798 QCfilter_multibyte
= intern (":filter-multibyte");
6799 staticpro (&QCfilter_multibyte
);
6801 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
6802 staticpro (&Qlast_nonmenu_event
);
6804 staticpro (&Vprocess_alist
);
6806 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
6807 doc
: /* *Non-nil means delete processes immediately when they exit.
6808 nil means don't delete them until `list-processes' is run. */);
6810 delete_exited_processes
= 1;
6812 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
6813 doc
: /* Control type of device used to communicate with subprocesses.
6814 Values are nil to use a pipe, or t or `pty' to use a pty.
6815 The value has no effect if the system has no ptys or if all ptys are busy:
6816 then a pipe is used in any case.
6817 The value takes effect when `start-process' is called. */);
6818 Vprocess_connection_type
= Qt
;
6820 #ifdef ADAPTIVE_READ_BUFFERING
6821 DEFVAR_LISP ("process-adaptive-read-buffering", &Vprocess_adaptive_read_buffering
,
6822 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
6823 On some systems, when Emacs reads the output from a subprocess, the output data
6824 is read in very small blocks, potentially resulting in very poor performance.
6825 This behavior can be remedied to some extent by setting this variable to a
6826 non-nil value, as it will automatically delay reading from such processes, to
6827 allowing them to produce more output before Emacs tries to read it.
6828 If the value is t, the delay is reset after each write to the process; any other
6829 non-nil value means that the delay is not reset on write.
6830 The variable takes effect when `start-process' is called. */);
6831 Vprocess_adaptive_read_buffering
= Qt
;
6834 defsubr (&Sprocessp
);
6835 defsubr (&Sget_process
);
6836 defsubr (&Sget_buffer_process
);
6837 defsubr (&Sdelete_process
);
6838 defsubr (&Sprocess_status
);
6839 defsubr (&Sprocess_exit_status
);
6840 defsubr (&Sprocess_id
);
6841 defsubr (&Sprocess_name
);
6842 defsubr (&Sprocess_tty_name
);
6843 defsubr (&Sprocess_command
);
6844 defsubr (&Sset_process_buffer
);
6845 defsubr (&Sprocess_buffer
);
6846 defsubr (&Sprocess_mark
);
6847 defsubr (&Sset_process_filter
);
6848 defsubr (&Sprocess_filter
);
6849 defsubr (&Sset_process_sentinel
);
6850 defsubr (&Sprocess_sentinel
);
6851 defsubr (&Sset_process_window_size
);
6852 defsubr (&Sset_process_inherit_coding_system_flag
);
6853 defsubr (&Sprocess_inherit_coding_system_flag
);
6854 defsubr (&Sset_process_query_on_exit_flag
);
6855 defsubr (&Sprocess_query_on_exit_flag
);
6856 defsubr (&Sprocess_contact
);
6857 defsubr (&Sprocess_plist
);
6858 defsubr (&Sset_process_plist
);
6859 defsubr (&Slist_processes
);
6860 defsubr (&Sprocess_list
);
6861 defsubr (&Sstart_process
);
6863 defsubr (&Sset_network_process_option
);
6864 defsubr (&Smake_network_process
);
6865 defsubr (&Sformat_network_address
);
6866 #endif /* HAVE_SOCKETS */
6867 #if defined(HAVE_SOCKETS) && defined(HAVE_NET_IF_H) && defined(HAVE_SYS_IOCTL_H)
6869 defsubr (&Snetwork_interface_list
);
6871 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
6872 defsubr (&Snetwork_interface_info
);
6874 #endif /* HAVE_SOCKETS ... */
6875 #ifdef DATAGRAM_SOCKETS
6876 defsubr (&Sprocess_datagram_address
);
6877 defsubr (&Sset_process_datagram_address
);
6879 defsubr (&Saccept_process_output
);
6880 defsubr (&Sprocess_send_region
);
6881 defsubr (&Sprocess_send_string
);
6882 defsubr (&Sinterrupt_process
);
6883 defsubr (&Skill_process
);
6884 defsubr (&Squit_process
);
6885 defsubr (&Sstop_process
);
6886 defsubr (&Scontinue_process
);
6887 defsubr (&Sprocess_running_child_p
);
6888 defsubr (&Sprocess_send_eof
);
6889 defsubr (&Ssignal_process
);
6890 defsubr (&Swaiting_for_user_input_p
);
6891 /* defsubr (&Sprocess_connection); */
6892 defsubr (&Sset_process_coding_system
);
6893 defsubr (&Sprocess_coding_system
);
6894 defsubr (&Sset_process_filter_multibyte
);
6895 defsubr (&Sprocess_filter_multibyte_p
);
6899 #else /* not subprocesses */
6901 #include <sys/types.h>
6905 #include "systime.h"
6906 #include "character.h"
6908 #include "termopts.h"
6909 #include "sysselect.h"
6911 extern int frame_garbaged
;
6913 extern EMACS_TIME
timer_check ();
6914 extern int timers_run
;
6918 /* As described above, except assuming that there are no subprocesses:
6920 Wait for timeout to elapse and/or keyboard input to be available.
6923 timeout in seconds, or
6924 zero for no limit, or
6925 -1 means gobble data immediately available but don't wait for any.
6927 read_kbd is a Lisp_Object:
6928 0 to ignore keyboard input, or
6929 1 to return when input is available, or
6930 -1 means caller will actually read the input, so don't throw to
6933 see full version for other parameters. We know that wait_proc will
6934 always be NULL, since `subprocesses' isn't defined.
6936 do_display != 0 means redisplay should be done to show subprocess
6937 output that arrives.
6939 Return true iff we received input from any process. */
6942 wait_reading_process_output (time_limit
, microsecs
, read_kbd
, do_display
,
6943 wait_for_cell
, wait_proc
, just_wait_proc
)
6944 int time_limit
, microsecs
, read_kbd
, do_display
;
6945 Lisp_Object wait_for_cell
;
6946 struct Lisp_Process
*wait_proc
;
6950 EMACS_TIME end_time
, timeout
;
6951 SELECT_TYPE waitchannels
;
6954 /* What does time_limit really mean? */
6955 if (time_limit
|| microsecs
)
6957 EMACS_GET_TIME (end_time
);
6958 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
6959 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6962 /* Turn off periodic alarms (in case they are in use)
6963 and then turn off any other atimers,
6964 because the select emulator uses alarms. */
6966 turn_on_atimers (0);
6970 int timeout_reduced_for_timers
= 0;
6972 /* If calling from keyboard input, do not quit
6973 since we want to return C-g as an input character.
6974 Otherwise, do pending quit if requested. */
6978 /* Exit now if the cell we're waiting for became non-nil. */
6979 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6982 /* Compute time from now till when time limit is up */
6983 /* Exit if already run out */
6984 if (time_limit
== -1)
6986 /* -1 specified for timeout means
6987 gobble output available now
6988 but don't wait at all. */
6990 EMACS_SET_SECS_USECS (timeout
, 0, 0);
6992 else if (time_limit
|| microsecs
)
6994 EMACS_GET_TIME (timeout
);
6995 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6996 if (EMACS_TIME_NEG_P (timeout
))
7001 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
7004 /* If our caller will not immediately handle keyboard events,
7005 run timer events directly.
7006 (Callers that will immediately read keyboard events
7007 call timer_delay on their own.) */
7008 if (NILP (wait_for_cell
))
7010 EMACS_TIME timer_delay
;
7014 int old_timers_run
= timers_run
;
7015 timer_delay
= timer_check (1);
7016 if (timers_run
!= old_timers_run
&& do_display
)
7017 /* We must retry, since a timer may have requeued itself
7018 and that could alter the time delay. */
7019 redisplay_preserve_echo_area (14);
7023 while (!detect_input_pending ());
7025 /* If there is unread keyboard input, also return. */
7027 && requeued_events_pending_p ())
7030 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
7032 EMACS_TIME difference
;
7033 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
7034 if (EMACS_TIME_NEG_P (difference
))
7036 timeout
= timer_delay
;
7037 timeout_reduced_for_timers
= 1;
7042 /* Cause C-g and alarm signals to take immediate action,
7043 and cause input available signals to zero out timeout. */
7045 set_waiting_for_input (&timeout
);
7047 /* Wait till there is something to do. */
7049 if (! read_kbd
&& NILP (wait_for_cell
))
7050 FD_ZERO (&waitchannels
);
7052 FD_SET (0, &waitchannels
);
7054 /* If a frame has been newly mapped and needs updating,
7055 reprocess its display stuff. */
7056 if (frame_garbaged
&& do_display
)
7058 clear_waiting_for_input ();
7059 redisplay_preserve_echo_area (15);
7061 set_waiting_for_input (&timeout
);
7064 if (read_kbd
&& detect_input_pending ())
7067 FD_ZERO (&waitchannels
);
7070 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
7075 /* Make C-g and alarm signals set flags again */
7076 clear_waiting_for_input ();
7078 /* If we woke up due to SIGWINCH, actually change size now. */
7079 do_pending_window_change (0);
7081 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
7082 /* We waited the full specified time, so return now. */
7087 /* If the system call was interrupted, then go around the
7089 if (xerrno
== EINTR
)
7090 FD_ZERO (&waitchannels
);
7092 error ("select error: %s", emacs_strerror (xerrno
));
7095 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
7096 /* System sometimes fails to deliver SIGIO. */
7097 kill (getpid (), SIGIO
);
7100 if (read_kbd
&& interrupt_input
&& (waitchannels
& 1))
7101 kill (getpid (), SIGIO
);
7104 /* Check for keyboard input */
7107 && detect_input_pending_run_timers (do_display
))
7109 swallow_events (do_display
);
7110 if (detect_input_pending_run_timers (do_display
))
7114 /* If there is unread keyboard input, also return. */
7116 && requeued_events_pending_p ())
7119 /* If wait_for_cell. check for keyboard input
7120 but don't run any timers.
7121 ??? (It seems wrong to me to check for keyboard
7122 input at all when wait_for_cell, but the code
7123 has been this way since July 1994.
7124 Try changing this after version 19.31.) */
7125 if (! NILP (wait_for_cell
)
7126 && detect_input_pending ())
7128 swallow_events (do_display
);
7129 if (detect_input_pending ())
7133 /* Exit now if the cell we're waiting for became non-nil. */
7134 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7144 /* Don't confuse make-docfile by having two doc strings for this function.
7145 make-docfile does not pay attention to #if, for good reason! */
7146 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7149 register Lisp_Object name
;
7154 /* Don't confuse make-docfile by having two doc strings for this function.
7155 make-docfile does not pay attention to #if, for good reason! */
7156 DEFUN ("process-inherit-coding-system-flag",
7157 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7161 register Lisp_Object process
;
7163 /* Ignore the argument and return the value of
7164 inherit-process-coding-system. */
7165 return inherit_process_coding_system
? Qt
: Qnil
;
7168 /* Kill all processes associated with `buffer'.
7169 If `buffer' is nil, kill all processes.
7170 Since we have no subprocesses, this does nothing. */
7173 kill_buffer_processes (buffer
)
7186 QCtype
= intern (":type");
7187 staticpro (&QCtype
);
7189 defsubr (&Sget_buffer_process
);
7190 defsubr (&Sprocess_inherit_coding_system_flag
);
7194 #endif /* not subprocesses */
7196 /* arch-tag: 3706c011-7b9a-4117-bd4f-59e7f701a4c4
7197 (do not change this comment) */