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., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
26 /* This file is split into two parts by the following preprocessor
27 conditional. The 'then' clause contains all of the support for
28 asynchronous subprocesses. The 'else' clause contains stub
29 versions of some of the asynchronous subprocess routines that are
30 often called elsewhere in Emacs, so we don't have to #ifdef the
31 sections that call them. */
39 #include <sys/types.h> /* some typedefs are used in sys/file.h */
46 #if defined(WINDOWSNT) || defined(UNIX98_PTYS)
49 #endif /* not WINDOWSNT */
51 #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */
52 #include <sys/socket.h>
54 #include <netinet/in.h>
55 #include <arpa/inet.h>
56 #ifdef NEED_NET_ERRNO_H
57 #include <net/errno.h>
58 #endif /* NEED_NET_ERRNO_H */
60 /* Are local (unix) sockets supported? */
61 #if defined (HAVE_SYS_UN_H) && !defined (NO_SOCKETS_IN_FILE_SYSTEM)
62 #if !defined (AF_LOCAL) && defined (AF_UNIX)
63 #define AF_LOCAL AF_UNIX
66 #define HAVE_LOCAL_SOCKETS
70 #endif /* HAVE_SOCKETS */
72 /* TERM is a poor-man's SLIP, used on GNU/Linux. */
77 /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */
78 #ifdef HAVE_BROKEN_INET_ADDR
79 #define IN_ADDR struct in_addr
80 #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1)
82 #define IN_ADDR unsigned long
83 #define NUMERIC_ADDR_ERROR (numeric_addr == -1)
86 #if defined(BSD_SYSTEM) || defined(STRIDE)
87 #include <sys/ioctl.h>
88 #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5)
90 #endif /* HAVE_PTYS and no O_NDELAY */
91 #endif /* BSD_SYSTEM || STRIDE */
93 #ifdef BROKEN_O_NONBLOCK
95 #endif /* BROKEN_O_NONBLOCK */
101 /* Can we use SIOCGIFCONF and/or SIOCGIFADDR */
103 #if defined(HAVE_SYS_IOCTL_H) && defined(HAVE_NET_IF_H)
104 /* sys/ioctl.h may have been included already */
106 #include <sys/ioctl.h>
113 #include <sys/sysmacros.h> /* for "minor" */
114 #endif /* not IRIS */
117 #include <sys/wait.h>
130 #include "termhooks.h"
131 #include "termopts.h"
132 #include "commands.h"
133 #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
);
658 if (inch
< 0 || outch
< 0)
661 if (!proc_decode_coding_system
[inch
])
662 proc_decode_coding_system
[inch
]
663 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
664 setup_coding_system (p
->decode_coding_system
,
665 proc_decode_coding_system
[inch
]);
666 if (! NILP (p
->filter
))
668 if (NILP (p
->filter_multibyte
))
669 setup_raw_text_coding_system (proc_decode_coding_system
[inch
]);
671 else if (BUFFERP (p
->buffer
))
673 if (NILP (XBUFFER (p
->buffer
)->enable_multibyte_characters
))
674 setup_raw_text_coding_system (proc_decode_coding_system
[inch
]);
677 if (!proc_encode_coding_system
[outch
])
678 proc_encode_coding_system
[outch
]
679 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
680 setup_coding_system (p
->encode_coding_system
,
681 proc_encode_coding_system
[outch
]);
684 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
685 doc
: /* Return t if OBJECT is a process. */)
689 return PROCESSP (object
) ? Qt
: Qnil
;
692 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
693 doc
: /* Return the process named NAME, or nil if there is none. */)
695 register Lisp_Object name
;
700 return Fcdr (Fassoc (name
, Vprocess_alist
));
703 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
704 doc
: /* Return the (or a) process associated with BUFFER.
705 BUFFER may be a buffer or the name of one. */)
707 register Lisp_Object buffer
;
709 register Lisp_Object buf
, tail
, proc
;
711 if (NILP (buffer
)) return Qnil
;
712 buf
= Fget_buffer (buffer
);
713 if (NILP (buf
)) return Qnil
;
715 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
717 proc
= Fcdr (Fcar (tail
));
718 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
724 /* This is how commands for the user decode process arguments. It
725 accepts a process, a process name, a buffer, a buffer name, or nil.
726 Buffers denote the first process in the buffer, and nil denotes the
731 register Lisp_Object name
;
733 register Lisp_Object proc
, obj
;
736 obj
= Fget_process (name
);
738 obj
= Fget_buffer (name
);
740 error ("Process %s does not exist", SDATA (name
));
742 else if (NILP (name
))
743 obj
= Fcurrent_buffer ();
747 /* Now obj should be either a buffer object or a process object.
751 proc
= Fget_buffer_process (obj
);
753 error ("Buffer %s has no process", SDATA (XBUFFER (obj
)->name
));
763 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
764 doc
: /* Delete PROCESS: kill it and forget about it immediately.
765 PROCESS may be a process, a buffer, the name of a process or buffer, or
766 nil, indicating the current buffer's process. */)
768 register Lisp_Object process
;
770 process
= get_process (process
);
771 XPROCESS (process
)->raw_status_low
= Qnil
;
772 XPROCESS (process
)->raw_status_high
= Qnil
;
773 if (NETCONN_P (process
))
775 XPROCESS (process
)->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
776 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
779 else if (XINT (XPROCESS (process
)->infd
) >= 0)
781 Fkill_process (process
, Qnil
);
782 /* Do this now, since remove_process will make sigchld_handler do nothing. */
783 XPROCESS (process
)->status
784 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
785 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
788 remove_process (process
);
792 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
793 doc
: /* Return the status of PROCESS.
794 The returned value is one of the following symbols:
795 run -- for a process that is running.
796 stop -- for a process stopped but continuable.
797 exit -- for a process that has exited.
798 signal -- for a process that has got a fatal signal.
799 open -- for a network stream connection that is open.
800 listen -- for a network stream server that is listening.
801 closed -- for a network stream connection that is closed.
802 connect -- when waiting for a non-blocking connection to complete.
803 failed -- when a non-blocking connection has failed.
804 nil -- if arg is a process name and no such process exists.
805 PROCESS may be a process, a buffer, the name of a process, or
806 nil, indicating the current buffer's process. */)
808 register Lisp_Object process
;
810 register struct Lisp_Process
*p
;
811 register Lisp_Object status
;
813 if (STRINGP (process
))
814 process
= Fget_process (process
);
816 process
= get_process (process
);
821 p
= XPROCESS (process
);
822 if (!NILP (p
->raw_status_low
))
826 status
= XCAR (status
);
829 if (EQ (status
, Qexit
))
831 else if (EQ (p
->command
, Qt
))
833 else if (EQ (status
, Qrun
))
839 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
841 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
842 If PROCESS has not yet exited or died, return 0. */)
844 register Lisp_Object process
;
846 CHECK_PROCESS (process
);
847 if (!NILP (XPROCESS (process
)->raw_status_low
))
848 update_status (XPROCESS (process
));
849 if (CONSP (XPROCESS (process
)->status
))
850 return XCAR (XCDR (XPROCESS (process
)->status
));
851 return make_number (0);
854 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
855 doc
: /* Return the process id of PROCESS.
856 This is the pid of the external process which PROCESS uses or talks to.
857 For a network connection, this value is nil. */)
859 register Lisp_Object process
;
861 CHECK_PROCESS (process
);
862 return XPROCESS (process
)->pid
;
865 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
866 doc
: /* Return the name of PROCESS, as a string.
867 This is the name of the program invoked in PROCESS,
868 possibly modified to make it unique among process names. */)
870 register Lisp_Object process
;
872 CHECK_PROCESS (process
);
873 return XPROCESS (process
)->name
;
876 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
877 doc
: /* Return the command that was executed to start PROCESS.
878 This is a list of strings, the first string being the program executed
879 and the rest of the strings being the arguments given to it.
880 For a non-child channel, this is nil. */)
882 register Lisp_Object process
;
884 CHECK_PROCESS (process
);
885 return XPROCESS (process
)->command
;
888 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
889 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
890 This is the terminal that the process itself reads and writes on,
891 not the name of the pty that Emacs uses to talk with that terminal. */)
893 register Lisp_Object process
;
895 CHECK_PROCESS (process
);
896 return XPROCESS (process
)->tty_name
;
899 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
901 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil). */)
903 register Lisp_Object process
, buffer
;
905 struct Lisp_Process
*p
;
907 CHECK_PROCESS (process
);
909 CHECK_BUFFER (buffer
);
910 p
= XPROCESS (process
);
913 p
->childp
= Fplist_put (p
->childp
, QCbuffer
, buffer
);
914 setup_process_coding_systems (process
);
918 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
920 doc
: /* Return the buffer PROCESS is associated with.
921 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
923 register Lisp_Object process
;
925 CHECK_PROCESS (process
);
926 return XPROCESS (process
)->buffer
;
929 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
931 doc
: /* Return the marker for the end of the last output from PROCESS. */)
933 register Lisp_Object process
;
935 CHECK_PROCESS (process
);
936 return XPROCESS (process
)->mark
;
939 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
941 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
942 t means stop accepting output from the process.
944 When a process has a filter, its buffer is not used for output.
945 Instead, each time it does output, the entire string of output is
946 passed to the filter.
948 The filter gets two arguments: the process and the string of output.
949 The string argument is normally a multibyte string, except:
950 - if the process' input coding system is no-conversion or raw-text,
951 it is a unibyte string (the non-converted input), or else
952 - if `default-enable-multibyte-characters' is nil, it is a unibyte
953 string (the result of converting the decoded input multibyte
954 string to unibyte with `string-make-unibyte'). */)
956 register Lisp_Object process
, filter
;
958 struct Lisp_Process
*p
;
960 CHECK_PROCESS (process
);
961 p
= XPROCESS (process
);
963 /* Don't signal an error if the process' input file descriptor
964 is closed. This could make debugging Lisp more difficult,
965 for example when doing something like
967 (setq process (start-process ...))
969 (set-process-filter process ...) */
971 if (XINT (p
->infd
) >= 0)
973 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
975 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
976 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
978 else if (EQ (p
->filter
, Qt
)
979 && !EQ (p
->command
, Qt
)) /* Network process not stopped. */
981 FD_SET (XINT (p
->infd
), &input_wait_mask
);
982 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
988 p
->childp
= Fplist_put (p
->childp
, QCfilter
, filter
);
989 setup_process_coding_systems (process
);
993 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
995 doc
: /* Returns the filter function of PROCESS; nil if none.
996 See `set-process-filter' for more info on filter functions. */)
998 register Lisp_Object process
;
1000 CHECK_PROCESS (process
);
1001 return XPROCESS (process
)->filter
;
1004 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
1006 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
1007 The sentinel is called as a function when the process changes state.
1008 It gets two arguments: the process, and a string describing the change. */)
1010 register Lisp_Object process
, sentinel
;
1012 struct Lisp_Process
*p
;
1014 CHECK_PROCESS (process
);
1015 p
= XPROCESS (process
);
1017 p
->sentinel
= sentinel
;
1019 p
->childp
= Fplist_put (p
->childp
, QCsentinel
, sentinel
);
1023 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1025 doc
: /* Return the sentinel of PROCESS; nil if none.
1026 See `set-process-sentinel' for more info on sentinels. */)
1028 register Lisp_Object process
;
1030 CHECK_PROCESS (process
);
1031 return XPROCESS (process
)->sentinel
;
1034 DEFUN ("set-process-window-size", Fset_process_window_size
,
1035 Sset_process_window_size
, 3, 3, 0,
1036 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1037 (process
, height
, width
)
1038 register Lisp_Object process
, height
, width
;
1040 CHECK_PROCESS (process
);
1041 CHECK_NATNUM (height
);
1042 CHECK_NATNUM (width
);
1044 if (XINT (XPROCESS (process
)->infd
) < 0
1045 || set_window_size (XINT (XPROCESS (process
)->infd
),
1046 XINT (height
), XINT (width
)) <= 0)
1052 DEFUN ("set-process-inherit-coding-system-flag",
1053 Fset_process_inherit_coding_system_flag
,
1054 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1055 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1056 If the second argument FLAG is non-nil, then the variable
1057 `buffer-file-coding-system' of the buffer associated with PROCESS
1058 will be bound to the value of the coding system used to decode
1061 This is useful when the coding system specified for the process buffer
1062 leaves either the character code conversion or the end-of-line conversion
1063 unspecified, or if the coding system used to decode the process output
1064 is more appropriate for saving the process buffer.
1066 Binding the variable `inherit-process-coding-system' to non-nil before
1067 starting the process is an alternative way of setting the inherit flag
1068 for the process which will run. */)
1070 register Lisp_Object process
, flag
;
1072 CHECK_PROCESS (process
);
1073 XPROCESS (process
)->inherit_coding_system_flag
= flag
;
1077 DEFUN ("process-inherit-coding-system-flag",
1078 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
1080 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
1081 If this flag is t, `buffer-file-coding-system' of the buffer
1082 associated with PROCESS will inherit the coding system used to decode
1083 the process output. */)
1085 register Lisp_Object process
;
1087 CHECK_PROCESS (process
);
1088 return XPROCESS (process
)->inherit_coding_system_flag
;
1091 DEFUN ("set-process-query-on-exit-flag",
1092 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1094 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1095 If the second argument FLAG is non-nil, Emacs will query the user before
1096 exiting if PROCESS is running. */)
1098 register Lisp_Object process
, flag
;
1100 CHECK_PROCESS (process
);
1101 XPROCESS (process
)->kill_without_query
= Fnull (flag
);
1105 DEFUN ("process-query-on-exit-flag",
1106 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1108 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1110 register Lisp_Object process
;
1112 CHECK_PROCESS (process
);
1113 return Fnull (XPROCESS (process
)->kill_without_query
);
1116 #ifdef DATAGRAM_SOCKETS
1117 Lisp_Object
Fprocess_datagram_address ();
1120 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1122 doc
: /* Return the contact info of PROCESS; t for a real child.
1123 For a net connection, the value depends on the optional KEY arg.
1124 If KEY is nil, value is a cons cell of the form (HOST SERVICE),
1125 if KEY is t, the complete contact information for the connection is
1126 returned, else the specific value for the keyword KEY is returned.
1127 See `make-network-process' for a list of keywords. */)
1129 register Lisp_Object process
, key
;
1131 Lisp_Object contact
;
1133 CHECK_PROCESS (process
);
1134 contact
= XPROCESS (process
)->childp
;
1136 #ifdef DATAGRAM_SOCKETS
1137 if (DATAGRAM_CONN_P (process
)
1138 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1139 contact
= Fplist_put (contact
, QCremote
,
1140 Fprocess_datagram_address (process
));
1143 if (!NETCONN_P (process
) || EQ (key
, Qt
))
1146 return Fcons (Fplist_get (contact
, QChost
),
1147 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1148 return Fplist_get (contact
, key
);
1151 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1153 doc
: /* Return the plist of PROCESS. */)
1155 register Lisp_Object process
;
1157 CHECK_PROCESS (process
);
1158 return XPROCESS (process
)->plist
;
1161 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1163 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1165 register Lisp_Object process
, plist
;
1167 CHECK_PROCESS (process
);
1170 XPROCESS (process
)->plist
= plist
;
1174 #if 0 /* Turned off because we don't currently record this info
1175 in the process. Perhaps add it. */
1176 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1177 doc
: /* Return the connection type of PROCESS.
1178 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1179 a socket connection. */)
1181 Lisp_Object process
;
1183 return XPROCESS (process
)->type
;
1188 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1190 doc
: /* Convert network ADDRESS from internal format to a string.
1191 If optional second argument OMIT-PORT is non-nil, don't include a port
1192 number in the string; in this case, interpret a 4 element vector as an
1193 IP address. Returns nil if format of ADDRESS is invalid. */)
1194 (address
, omit_port
)
1195 Lisp_Object address
, omit_port
;
1200 if (STRINGP (address
)) /* AF_LOCAL */
1203 if (VECTORP (address
)) /* AF_INET */
1205 register struct Lisp_Vector
*p
= XVECTOR (address
);
1206 Lisp_Object args
[6];
1209 if (!NILP (omit_port
) && (p
->size
== 4 || p
->size
== 5))
1211 args
[0] = build_string ("%d.%d.%d.%d");
1214 else if (p
->size
== 5)
1216 args
[0] = build_string ("%d.%d.%d.%d:%d");
1222 for (i
= 0; i
< nargs
; i
++)
1223 args
[i
+1] = p
->contents
[i
];
1224 return Fformat (nargs
+1, args
);
1227 if (CONSP (address
))
1229 Lisp_Object args
[2];
1230 args
[0] = build_string ("<Family %d>");
1231 args
[1] = Fcar (address
);
1232 return Fformat (2, args
);
1241 list_processes_1 (query_only
)
1242 Lisp_Object query_only
;
1244 register Lisp_Object tail
, tem
;
1245 Lisp_Object proc
, minspace
, tem1
;
1246 register struct Lisp_Process
*p
;
1248 int w_proc
, w_buffer
, w_tty
;
1249 Lisp_Object i_status
, i_buffer
, i_tty
, i_command
;
1251 w_proc
= 4; /* Proc */
1252 w_buffer
= 6; /* Buffer */
1253 w_tty
= 0; /* Omit if no ttys */
1255 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
1259 proc
= Fcdr (Fcar (tail
));
1260 p
= XPROCESS (proc
);
1261 if (NILP (p
->childp
))
1263 if (!NILP (query_only
) && !NILP (p
->kill_without_query
))
1265 if (STRINGP (p
->name
)
1266 && ( i
= SCHARS (p
->name
), (i
> w_proc
)))
1268 if (!NILP (p
->buffer
))
1270 if (NILP (XBUFFER (p
->buffer
)->name
) && w_buffer
< 8)
1271 w_buffer
= 8; /* (Killed) */
1272 else if ((i
= SCHARS (XBUFFER (p
->buffer
)->name
), (i
> w_buffer
)))
1275 if (STRINGP (p
->tty_name
)
1276 && (i
= SCHARS (p
->tty_name
), (i
> w_tty
)))
1280 XSETFASTINT (i_status
, w_proc
+ 1);
1281 XSETFASTINT (i_buffer
, XFASTINT (i_status
) + 9);
1284 XSETFASTINT (i_tty
, XFASTINT (i_buffer
) + w_buffer
+ 1);
1285 XSETFASTINT (i_command
, XFASTINT (i_buffer
) + w_tty
+ 1);
1288 XSETFASTINT (i_command
, XFASTINT (i_buffer
) + w_buffer
+ 1);
1291 XSETFASTINT (minspace
, 1);
1293 set_buffer_internal (XBUFFER (Vstandard_output
));
1294 current_buffer
->undo_list
= Qt
;
1296 current_buffer
->truncate_lines
= Qt
;
1298 write_string ("Proc", -1);
1299 Findent_to (i_status
, minspace
); write_string ("Status", -1);
1300 Findent_to (i_buffer
, minspace
); write_string ("Buffer", -1);
1303 Findent_to (i_tty
, minspace
); write_string ("Tty", -1);
1305 Findent_to (i_command
, minspace
); write_string ("Command", -1);
1306 write_string ("\n", -1);
1308 write_string ("----", -1);
1309 Findent_to (i_status
, minspace
); write_string ("------", -1);
1310 Findent_to (i_buffer
, minspace
); write_string ("------", -1);
1313 Findent_to (i_tty
, minspace
); write_string ("---", -1);
1315 Findent_to (i_command
, minspace
); write_string ("-------", -1);
1316 write_string ("\n", -1);
1318 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
1322 proc
= Fcdr (Fcar (tail
));
1323 p
= XPROCESS (proc
);
1324 if (NILP (p
->childp
))
1326 if (!NILP (query_only
) && !NILP (p
->kill_without_query
))
1329 Finsert (1, &p
->name
);
1330 Findent_to (i_status
, minspace
);
1332 if (!NILP (p
->raw_status_low
))
1335 if (CONSP (p
->status
))
1336 symbol
= XCAR (p
->status
);
1339 if (EQ (symbol
, Qsignal
))
1342 tem
= Fcar (Fcdr (p
->status
));
1344 if (XINT (tem
) < NSIG
)
1345 write_string (sys_errlist
[XINT (tem
)], -1);
1348 Fprinc (symbol
, Qnil
);
1350 else if (NETCONN1_P (p
))
1352 if (EQ (symbol
, Qexit
))
1353 write_string ("closed", -1);
1354 else if (EQ (p
->command
, Qt
))
1355 write_string ("stopped", -1);
1356 else if (EQ (symbol
, Qrun
))
1357 write_string ("open", -1);
1359 Fprinc (symbol
, Qnil
);
1362 Fprinc (symbol
, Qnil
);
1364 if (EQ (symbol
, Qexit
))
1367 tem
= Fcar (Fcdr (p
->status
));
1370 sprintf (tembuf
, " %d", (int) XFASTINT (tem
));
1371 write_string (tembuf
, -1);
1375 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
1376 remove_process (proc
);
1378 Findent_to (i_buffer
, minspace
);
1379 if (NILP (p
->buffer
))
1380 insert_string ("(none)");
1381 else if (NILP (XBUFFER (p
->buffer
)->name
))
1382 insert_string ("(Killed)");
1384 Finsert (1, &XBUFFER (p
->buffer
)->name
);
1388 Findent_to (i_tty
, minspace
);
1389 if (STRINGP (p
->tty_name
))
1390 Finsert (1, &p
->tty_name
);
1393 Findent_to (i_command
, minspace
);
1395 if (EQ (p
->status
, Qlisten
))
1397 Lisp_Object port
= Fplist_get (p
->childp
, QCservice
);
1398 if (INTEGERP (port
))
1399 port
= Fnumber_to_string (port
);
1401 port
= Fformat_network_address (Fplist_get (p
->childp
, QClocal
), Qnil
);
1402 sprintf (tembuf
, "(network %s server on %s)\n",
1403 (DATAGRAM_CHAN_P (XINT (p
->infd
)) ? "datagram" : "stream"),
1404 (STRINGP (port
) ? (char *)SDATA (port
) : "?"));
1405 insert_string (tembuf
);
1407 else if (NETCONN1_P (p
))
1409 /* For a local socket, there is no host name,
1410 so display service instead. */
1411 Lisp_Object host
= Fplist_get (p
->childp
, QChost
);
1412 if (!STRINGP (host
))
1414 host
= Fplist_get (p
->childp
, QCservice
);
1415 if (INTEGERP (host
))
1416 host
= Fnumber_to_string (host
);
1419 host
= Fformat_network_address (Fplist_get (p
->childp
, QCremote
), Qnil
);
1420 sprintf (tembuf
, "(network %s connection to %s)\n",
1421 (DATAGRAM_CHAN_P (XINT (p
->infd
)) ? "datagram" : "stream"),
1422 (STRINGP (host
) ? (char *)SDATA (host
) : "?"));
1423 insert_string (tembuf
);
1435 insert_string (" ");
1437 insert_string ("\n");
1443 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 1, "P",
1444 doc
: /* Display a list of all processes.
1445 If optional argument QUERY-ONLY is non-nil, only processes with
1446 the query-on-exit flag set will be listed.
1447 Any process listed as exited or signaled is actually eliminated
1448 after the listing is made. */)
1450 Lisp_Object query_only
;
1452 internal_with_output_to_temp_buffer ("*Process List*",
1453 list_processes_1
, query_only
);
1457 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1458 doc
: /* Return a list of all processes. */)
1461 return Fmapcar (Qcdr
, Vprocess_alist
);
1464 /* Starting asynchronous inferior processes. */
1466 static Lisp_Object
start_process_unwind ();
1468 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1469 doc
: /* Start a program in a subprocess. Return the process object for it.
1470 NAME is name for process. It is modified if necessary to make it unique.
1471 BUFFER is the buffer (or buffer name) to associate with the process.
1472 Process output goes at end of that buffer, unless you specify
1473 an output stream or filter function to handle the output.
1474 BUFFER may be also nil, meaning that this process is not associated
1476 PROGRAM is the program file name. It is searched for in PATH.
1477 Remaining arguments are strings to give program as arguments.
1479 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1482 register Lisp_Object
*args
;
1484 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1486 register unsigned char *new_argv
;
1489 register unsigned char **new_argv
;
1492 int count
= SPECPDL_INDEX ();
1496 buffer
= Fget_buffer_create (buffer
);
1498 /* Make sure that the child will be able to chdir to the current
1499 buffer's current directory, or its unhandled equivalent. We
1500 can't just have the child check for an error when it does the
1501 chdir, since it's in a vfork.
1503 We have to GCPRO around this because Fexpand_file_name and
1504 Funhandled_file_name_directory might call a file name handling
1505 function. The argument list is protected by the caller, so all
1506 we really have to worry about is buffer. */
1508 struct gcpro gcpro1
, gcpro2
;
1510 current_dir
= current_buffer
->directory
;
1512 GCPRO2 (buffer
, current_dir
);
1515 = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir
),
1517 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1518 report_file_error ("Setting current directory",
1519 Fcons (current_buffer
->directory
, Qnil
));
1525 CHECK_STRING (name
);
1529 CHECK_STRING (program
);
1531 proc
= make_process (name
);
1532 /* If an error occurs and we can't start the process, we want to
1533 remove it from the process list. This means that each error
1534 check in create_process doesn't need to call remove_process
1535 itself; it's all taken care of here. */
1536 record_unwind_protect (start_process_unwind
, proc
);
1538 XPROCESS (proc
)->childp
= Qt
;
1539 XPROCESS (proc
)->plist
= Qnil
;
1540 XPROCESS (proc
)->buffer
= buffer
;
1541 XPROCESS (proc
)->sentinel
= Qnil
;
1542 XPROCESS (proc
)->filter
= Qnil
;
1543 XPROCESS (proc
)->filter_multibyte
1544 = buffer_defaults
.enable_multibyte_characters
;
1545 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1547 #ifdef ADAPTIVE_READ_BUFFERING
1548 XPROCESS (proc
)->adaptive_read_buffering
= Vprocess_adaptive_read_buffering
;
1551 /* Make the process marker point into the process buffer (if any). */
1553 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1554 BUF_ZV (XBUFFER (buffer
)),
1555 BUF_ZV_BYTE (XBUFFER (buffer
)));
1558 /* Decide coding systems for communicating with the process. Here
1559 we don't setup the structure coding_system nor pay attention to
1560 unibyte mode. They are done in create_process. */
1562 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1563 Lisp_Object coding_systems
= Qt
;
1564 Lisp_Object val
, *args2
;
1565 struct gcpro gcpro1
, gcpro2
;
1567 val
= Vcoding_system_for_read
;
1570 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1571 args2
[0] = Qstart_process
;
1572 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1573 GCPRO2 (proc
, current_dir
);
1574 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1576 if (CONSP (coding_systems
))
1577 val
= XCAR (coding_systems
);
1578 else if (CONSP (Vdefault_process_coding_system
))
1579 val
= XCAR (Vdefault_process_coding_system
);
1581 XPROCESS (proc
)->decode_coding_system
= val
;
1583 val
= Vcoding_system_for_write
;
1586 if (EQ (coding_systems
, Qt
))
1588 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof args2
);
1589 args2
[0] = Qstart_process
;
1590 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1591 GCPRO2 (proc
, current_dir
);
1592 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1595 if (CONSP (coding_systems
))
1596 val
= XCDR (coding_systems
);
1597 else if (CONSP (Vdefault_process_coding_system
))
1598 val
= XCDR (Vdefault_process_coding_system
);
1600 XPROCESS (proc
)->encode_coding_system
= val
;
1604 /* Make a one member argv with all args concatenated
1605 together separated by a blank. */
1606 len
= SBYTES (program
) + 2;
1607 for (i
= 3; i
< nargs
; i
++)
1611 len
+= SBYTES (tem
) + 1; /* count the blank */
1613 new_argv
= (unsigned char *) alloca (len
);
1614 strcpy (new_argv
, SDATA (program
));
1615 for (i
= 3; i
< nargs
; i
++)
1619 strcat (new_argv
, " ");
1620 strcat (new_argv
, SDATA (tem
));
1622 /* Need to add code here to check for program existence on VMS */
1625 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1627 /* If program file name is not absolute, search our path for it.
1628 Put the name we will really use in TEM. */
1629 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1630 && !(SCHARS (program
) > 1
1631 && IS_DEVICE_SEP (SREF (program
, 1))))
1633 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1636 GCPRO4 (name
, program
, buffer
, current_dir
);
1637 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1640 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1641 tem
= Fexpand_file_name (tem
, Qnil
);
1645 if (!NILP (Ffile_directory_p (program
)))
1646 error ("Specified program for new process is a directory");
1650 /* If program file name starts with /: for quoting a magic name,
1652 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1653 && SREF (tem
, 1) == ':')
1654 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1656 /* Encode the file name and put it in NEW_ARGV.
1657 That's where the child will use it to execute the program. */
1658 tem
= ENCODE_FILE (tem
);
1659 new_argv
[0] = SDATA (tem
);
1661 /* Here we encode arguments by the coding system used for sending
1662 data to the process. We don't support using different coding
1663 systems for encoding arguments and for encoding data sent to the
1666 for (i
= 3; i
< nargs
; i
++)
1670 if (STRING_MULTIBYTE (tem
))
1671 tem
= (code_convert_string_norecord
1672 (tem
, XPROCESS (proc
)->encode_coding_system
, 1));
1673 new_argv
[i
- 2] = SDATA (tem
);
1675 new_argv
[i
- 2] = 0;
1676 #endif /* not VMS */
1678 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
1679 XPROCESS (proc
)->decoding_carryover
= make_number (0);
1680 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
1681 XPROCESS (proc
)->encoding_carryover
= make_number (0);
1683 XPROCESS (proc
)->inherit_coding_system_flag
1684 = (NILP (buffer
) || !inherit_process_coding_system
1687 create_process (proc
, (char **) new_argv
, current_dir
);
1689 return unbind_to (count
, proc
);
1692 /* This function is the unwind_protect form for Fstart_process. If
1693 PROC doesn't have its pid set, then we know someone has signaled
1694 an error and the process wasn't started successfully, so we should
1695 remove it from the process list. */
1697 start_process_unwind (proc
)
1700 if (!PROCESSP (proc
))
1703 /* Was PROC started successfully? */
1704 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1705 remove_process (proc
);
1711 create_process_1 (timer
)
1712 struct atimer
*timer
;
1714 /* Nothing to do. */
1718 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1721 /* Mimic blocking of signals on system V, which doesn't really have it. */
1723 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1724 int sigchld_deferred
;
1727 create_process_sigchld ()
1729 signal (SIGCHLD
, create_process_sigchld
);
1731 sigchld_deferred
= 1;
1737 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1739 create_process (process
, new_argv
, current_dir
)
1740 Lisp_Object process
;
1742 Lisp_Object current_dir
;
1744 int pid
, inchannel
, outchannel
;
1746 #ifdef POSIX_SIGNALS
1749 struct sigaction sigint_action
;
1750 struct sigaction sigquit_action
;
1752 struct sigaction sighup_action
;
1754 #else /* !POSIX_SIGNALS */
1757 SIGTYPE (*sigchld
)();
1760 #endif /* !POSIX_SIGNALS */
1761 /* Use volatile to protect variables from being clobbered by longjmp. */
1762 volatile int forkin
, forkout
;
1763 volatile int pty_flag
= 0;
1765 extern char **environ
;
1768 inchannel
= outchannel
= -1;
1771 if (!NILP (Vprocess_connection_type
))
1772 outchannel
= inchannel
= allocate_pty ();
1776 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1777 /* On most USG systems it does not work to open the pty's tty here,
1778 then close it and reopen it in the child. */
1780 /* Don't let this terminal become our controlling terminal
1781 (in case we don't have one). */
1782 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1784 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1787 report_file_error ("Opening pty", Qnil
);
1789 forkin
= forkout
= -1;
1790 #endif /* not USG, or USG_SUBTTY_WORKS */
1794 #endif /* HAVE_PTYS */
1797 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1798 report_file_error ("Opening socketpair", Qnil
);
1799 outchannel
= inchannel
= sv
[0];
1800 forkout
= forkin
= sv
[1];
1802 #else /* not SKTPAIR */
1807 report_file_error ("Creating pipe", Qnil
);
1813 emacs_close (inchannel
);
1814 emacs_close (forkout
);
1815 report_file_error ("Creating pipe", Qnil
);
1820 #endif /* not SKTPAIR */
1823 /* Replaced by close_process_descs */
1824 set_exclusive_use (inchannel
);
1825 set_exclusive_use (outchannel
);
1828 /* Stride people say it's a mystery why this is needed
1829 as well as the O_NDELAY, but that it fails without this. */
1830 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1833 ioctl (inchannel
, FIONBIO
, &one
);
1838 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1839 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1842 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1843 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1847 /* Record this as an active process, with its channels.
1848 As a result, child_setup will close Emacs's side of the pipes. */
1849 chan_process
[inchannel
] = process
;
1850 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1851 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1853 /* Previously we recorded the tty descriptor used in the subprocess.
1854 It was only used for getting the foreground tty process, so now
1855 we just reopen the device (see emacs_get_tty_pgrp) as this is
1856 more portable (see USG_SUBTTY_WORKS above). */
1858 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1859 XPROCESS (process
)->status
= Qrun
;
1860 setup_process_coding_systems (process
);
1862 /* Delay interrupts until we have a chance to store
1863 the new fork's pid in its process structure */
1864 #ifdef POSIX_SIGNALS
1865 sigemptyset (&blocked
);
1867 sigaddset (&blocked
, SIGCHLD
);
1869 #ifdef HAVE_WORKING_VFORK
1870 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1871 this sets the parent's signal handlers as well as the child's.
1872 So delay all interrupts whose handlers the child might munge,
1873 and record the current handlers so they can be restored later. */
1874 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1875 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1877 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1879 #endif /* HAVE_WORKING_VFORK */
1880 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1881 #else /* !POSIX_SIGNALS */
1885 #else /* not BSD4_1 */
1886 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1887 sigsetmask (sigmask (SIGCHLD
));
1888 #else /* ordinary USG */
1890 sigchld_deferred
= 0;
1891 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1893 #endif /* ordinary USG */
1894 #endif /* not BSD4_1 */
1895 #endif /* SIGCHLD */
1896 #endif /* !POSIX_SIGNALS */
1898 FD_SET (inchannel
, &input_wait_mask
);
1899 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1900 if (inchannel
> max_process_desc
)
1901 max_process_desc
= inchannel
;
1903 /* Until we store the proper pid, enable sigchld_handler
1904 to recognize an unknown pid as standing for this process.
1905 It is very important not to let this `marker' value stay
1906 in the table after this function has returned; if it does
1907 it might cause call-process to hang and subsequent asynchronous
1908 processes to get their return values scrambled. */
1909 XSETINT (XPROCESS (process
)->pid
, -1);
1914 /* child_setup must clobber environ on systems with true vfork.
1915 Protect it from permanent change. */
1916 char **save_environ
= environ
;
1918 current_dir
= ENCODE_FILE (current_dir
);
1923 #endif /* not WINDOWSNT */
1925 int xforkin
= forkin
;
1926 int xforkout
= forkout
;
1928 #if 0 /* This was probably a mistake--it duplicates code later on,
1929 but fails to handle all the cases. */
1930 /* Make sure SIGCHLD is not blocked in the child. */
1931 sigsetmask (SIGEMPTYMASK
);
1934 /* Make the pty be the controlling terminal of the process. */
1936 /* First, disconnect its current controlling terminal. */
1938 /* We tried doing setsid only if pty_flag, but it caused
1939 process_set_signal to fail on SGI when using a pipe. */
1941 /* Make the pty's terminal the controlling terminal. */
1945 /* We ignore the return value
1946 because faith@cs.unc.edu says that is necessary on Linux. */
1947 ioctl (xforkin
, TIOCSCTTY
, 0);
1950 #else /* not HAVE_SETSID */
1952 /* It's very important to call setpgrp here and no time
1953 afterwards. Otherwise, we lose our controlling tty which
1954 is set when we open the pty. */
1957 #endif /* not HAVE_SETSID */
1958 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1959 if (pty_flag
&& xforkin
>= 0)
1962 tcgetattr (xforkin
, &t
);
1964 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1965 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1968 #if defined (NTTYDISC) && defined (TIOCSETD)
1969 if (pty_flag
&& xforkin
>= 0)
1971 /* Use new line discipline. */
1972 int ldisc
= NTTYDISC
;
1973 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1978 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1979 can do TIOCSPGRP only to the process's controlling tty. */
1982 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1983 I can't test it since I don't have 4.3. */
1984 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1985 ioctl (j
, TIOCNOTTY
, 0);
1988 /* In order to get a controlling terminal on some versions
1989 of BSD, it is necessary to put the process in pgrp 0
1990 before it opens the terminal. */
1998 #endif /* TIOCNOTTY */
2000 #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY)
2001 /*** There is a suggestion that this ought to be a
2002 conditional on TIOCSPGRP,
2003 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
2004 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
2005 that system does seem to need this code, even though
2006 both HAVE_SETSID and TIOCSCTTY are defined. */
2007 /* Now close the pty (if we had it open) and reopen it.
2008 This makes the pty the controlling terminal of the subprocess. */
2011 #ifdef SET_CHILD_PTY_PGRP
2012 int pgrp
= getpid ();
2015 /* I wonder if emacs_close (emacs_open (pty_name, ...))
2018 emacs_close (xforkin
);
2019 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
2023 emacs_write (1, "Couldn't open the pty terminal ", 31);
2024 emacs_write (1, pty_name
, strlen (pty_name
));
2025 emacs_write (1, "\n", 1);
2029 #ifdef SET_CHILD_PTY_PGRP
2030 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
2031 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
2034 #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */
2036 #ifdef SETUP_SLAVE_PTY
2041 #endif /* SETUP_SLAVE_PTY */
2043 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
2044 Now reenable it in the child, so it will die when we want it to. */
2046 signal (SIGHUP
, SIG_DFL
);
2048 #endif /* HAVE_PTYS */
2050 signal (SIGINT
, SIG_DFL
);
2051 signal (SIGQUIT
, SIG_DFL
);
2053 /* Stop blocking signals in the child. */
2054 #ifdef POSIX_SIGNALS
2055 sigprocmask (SIG_SETMASK
, &procmask
, 0);
2056 #else /* !POSIX_SIGNALS */
2060 #else /* not BSD4_1 */
2061 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
2062 sigsetmask (SIGEMPTYMASK
);
2063 #else /* ordinary USG */
2065 signal (SIGCHLD
, sigchld
);
2067 #endif /* ordinary USG */
2068 #endif /* not BSD4_1 */
2069 #endif /* SIGCHLD */
2070 #endif /* !POSIX_SIGNALS */
2073 child_setup_tty (xforkout
);
2075 pid
= child_setup (xforkin
, xforkout
, xforkout
,
2076 new_argv
, 1, current_dir
);
2077 #else /* not WINDOWSNT */
2078 child_setup (xforkin
, xforkout
, xforkout
,
2079 new_argv
, 1, current_dir
);
2080 #endif /* not WINDOWSNT */
2082 environ
= save_environ
;
2087 /* This runs in the Emacs process. */
2091 emacs_close (forkin
);
2092 if (forkin
!= forkout
&& forkout
>= 0)
2093 emacs_close (forkout
);
2097 /* vfork succeeded. */
2098 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
2101 register_child (pid
, inchannel
);
2102 #endif /* WINDOWSNT */
2104 /* If the subfork execv fails, and it exits,
2105 this close hangs. I don't know why.
2106 So have an interrupt jar it loose. */
2108 struct atimer
*timer
;
2112 EMACS_SET_SECS_USECS (offset
, 1, 0);
2113 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
2116 emacs_close (forkin
);
2118 cancel_atimer (timer
);
2122 if (forkin
!= forkout
&& forkout
>= 0)
2123 emacs_close (forkout
);
2127 XPROCESS (process
)->tty_name
= build_string (pty_name
);
2130 XPROCESS (process
)->tty_name
= Qnil
;
2133 /* Restore the signal state whether vfork succeeded or not.
2134 (We will signal an error, below, if it failed.) */
2135 #ifdef POSIX_SIGNALS
2136 #ifdef HAVE_WORKING_VFORK
2137 /* Restore the parent's signal handlers. */
2138 sigaction (SIGINT
, &sigint_action
, 0);
2139 sigaction (SIGQUIT
, &sigquit_action
, 0);
2141 sigaction (SIGHUP
, &sighup_action
, 0);
2143 #endif /* HAVE_WORKING_VFORK */
2144 /* Stop blocking signals in the parent. */
2145 sigprocmask (SIG_SETMASK
, &procmask
, 0);
2146 #else /* !POSIX_SIGNALS */
2150 #else /* not BSD4_1 */
2151 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
2152 sigsetmask (SIGEMPTYMASK
);
2153 #else /* ordinary USG */
2155 signal (SIGCHLD
, sigchld
);
2156 /* Now really handle any of these signals
2157 that came in during this function. */
2158 if (sigchld_deferred
)
2159 kill (getpid (), SIGCHLD
);
2161 #endif /* ordinary USG */
2162 #endif /* not BSD4_1 */
2163 #endif /* SIGCHLD */
2164 #endif /* !POSIX_SIGNALS */
2166 /* Now generate the error if vfork failed. */
2168 report_file_error ("Doing vfork", Qnil
);
2170 #endif /* not VMS */
2175 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2176 The address family of sa is not included in the result. */
2179 conv_sockaddr_to_lisp (sa
, len
)
2180 struct sockaddr
*sa
;
2183 Lisp_Object address
;
2186 register struct Lisp_Vector
*p
;
2188 switch (sa
->sa_family
)
2192 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2193 len
= sizeof (sin
->sin_addr
) + 1;
2194 address
= Fmake_vector (make_number (len
), Qnil
);
2195 p
= XVECTOR (address
);
2196 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2197 cp
= (unsigned char *)&sin
->sin_addr
;
2200 #ifdef HAVE_LOCAL_SOCKETS
2203 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2204 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2205 if (sockun
->sun_path
[i
] == 0)
2207 return make_unibyte_string (sockun
->sun_path
, i
);
2211 len
-= sizeof (sa
->sa_family
);
2212 address
= Fcons (make_number (sa
->sa_family
),
2213 Fmake_vector (make_number (len
), Qnil
));
2214 p
= XVECTOR (XCDR (address
));
2215 cp
= (unsigned char *) sa
+ sizeof (sa
->sa_family
);
2221 p
->contents
[i
++] = make_number (*cp
++);
2227 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2230 get_lisp_to_sockaddr_size (address
, familyp
)
2231 Lisp_Object address
;
2234 register struct Lisp_Vector
*p
;
2236 if (VECTORP (address
))
2238 p
= XVECTOR (address
);
2242 return sizeof (struct sockaddr_in
);
2245 #ifdef HAVE_LOCAL_SOCKETS
2246 else if (STRINGP (address
))
2248 *familyp
= AF_LOCAL
;
2249 return sizeof (struct sockaddr_un
);
2252 else if (CONSP (address
) && INTEGERP (XCAR (address
)) && VECTORP (XCDR (address
)))
2254 struct sockaddr
*sa
;
2255 *familyp
= XINT (XCAR (address
));
2256 p
= XVECTOR (XCDR (address
));
2257 return p
->size
+ sizeof (sa
->sa_family
);
2262 /* Convert an address object (vector or string) to an internal sockaddr.
2263 Format of address has already been validated by size_lisp_to_sockaddr. */
2266 conv_lisp_to_sockaddr (family
, address
, sa
, len
)
2268 Lisp_Object address
;
2269 struct sockaddr
*sa
;
2272 register struct Lisp_Vector
*p
;
2273 register unsigned char *cp
= NULL
;
2277 sa
->sa_family
= family
;
2279 if (VECTORP (address
))
2281 p
= XVECTOR (address
);
2282 if (family
== AF_INET
)
2284 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2285 len
= sizeof (sin
->sin_addr
) + 1;
2286 i
= XINT (p
->contents
[--len
]);
2287 sin
->sin_port
= htons (i
);
2288 cp
= (unsigned char *)&sin
->sin_addr
;
2291 else if (STRINGP (address
))
2293 #ifdef HAVE_LOCAL_SOCKETS
2294 if (family
== AF_LOCAL
)
2296 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2297 cp
= SDATA (address
);
2298 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2299 sockun
->sun_path
[i
] = *cp
++;
2306 p
= XVECTOR (XCDR (address
));
2307 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2310 for (i
= 0; i
< len
; i
++)
2311 if (INTEGERP (p
->contents
[i
]))
2312 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2315 #ifdef DATAGRAM_SOCKETS
2316 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2318 doc
: /* Get the current datagram address associated with PROCESS. */)
2320 Lisp_Object process
;
2324 CHECK_PROCESS (process
);
2326 if (!DATAGRAM_CONN_P (process
))
2329 channel
= XINT (XPROCESS (process
)->infd
);
2330 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2331 datagram_address
[channel
].len
);
2334 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2336 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2337 Returns nil upon error setting address, ADDRESS otherwise. */)
2339 Lisp_Object process
, address
;
2344 CHECK_PROCESS (process
);
2346 if (!DATAGRAM_CONN_P (process
))
2349 channel
= XINT (XPROCESS (process
)->infd
);
2351 len
= get_lisp_to_sockaddr_size (address
, &family
);
2352 if (datagram_address
[channel
].len
!= len
)
2354 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2360 static struct socket_options
{
2361 /* The name of this option. Should be lowercase version of option
2362 name without SO_ prefix. */
2364 /* Option level SOL_... */
2366 /* Option number SO_... */
2368 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2369 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2370 } socket_options
[] =
2372 #ifdef SO_BINDTODEVICE
2373 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2376 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2379 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2382 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2385 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2388 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2391 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2394 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2396 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2399 /* Set option OPT to value VAL on socket S.
2401 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2402 Signals an error if setting a known option fails.
2406 set_socket_option (s
, opt
, val
)
2408 Lisp_Object opt
, val
;
2411 struct socket_options
*sopt
;
2416 name
= (char *) SDATA (SYMBOL_NAME (opt
));
2417 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2418 if (strcmp (name
, sopt
->name
) == 0)
2421 switch (sopt
->opttype
)
2426 optval
= NILP (val
) ? 0 : 1;
2427 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2428 &optval
, sizeof (optval
));
2436 optval
= XINT (val
);
2438 error ("Bad option value for %s", name
);
2439 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2440 &optval
, sizeof (optval
));
2444 #ifdef SO_BINDTODEVICE
2447 char devname
[IFNAMSIZ
+1];
2449 /* This is broken, at least in the Linux 2.4 kernel.
2450 To unbind, the arg must be a zero integer, not the empty string.
2451 This should work on all systems. KFS. 2003-09-23. */
2452 bzero (devname
, sizeof devname
);
2455 char *arg
= (char *) SDATA (val
);
2456 int len
= min (strlen (arg
), IFNAMSIZ
);
2457 bcopy (arg
, devname
, len
);
2459 else if (!NILP (val
))
2460 error ("Bad option value for %s", name
);
2461 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2470 struct linger linger
;
2473 linger
.l_linger
= 0;
2475 linger
.l_linger
= XINT (val
);
2477 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2478 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2479 &linger
, sizeof (linger
));
2489 report_file_error ("Cannot set network option",
2490 Fcons (opt
, Fcons (val
, Qnil
)));
2491 return (1 << sopt
->optbit
);
2495 DEFUN ("set-network-process-option",
2496 Fset_network_process_option
, Sset_network_process_option
,
2498 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2499 See `make-network-process' for a list of options and values.
2500 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2501 OPTION is not a supported option, return nil instead; otherwise return t. */)
2502 (process
, option
, value
, no_error
)
2503 Lisp_Object process
, option
, value
;
2504 Lisp_Object no_error
;
2507 struct Lisp_Process
*p
;
2509 CHECK_PROCESS (process
);
2510 p
= XPROCESS (process
);
2511 if (!NETCONN1_P (p
))
2512 error ("Process is not a network process");
2516 error ("Process is not running");
2518 if (set_socket_option (s
, option
, value
))
2520 p
->childp
= Fplist_put (p
->childp
, option
, value
);
2524 if (NILP (no_error
))
2525 error ("Unknown or unsupported option");
2531 /* A version of request_sigio suitable for a record_unwind_protect. */
2534 unwind_request_sigio (dummy
)
2537 if (interrupt_input
)
2542 /* Create a network stream/datagram client/server process. Treated
2543 exactly like a normal process when reading and writing. Primary
2544 differences are in status display and process deletion. A network
2545 connection has no PID; you cannot signal it. All you can do is
2546 stop/continue it and deactivate/close it via delete-process */
2548 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2550 doc
: /* Create and return a network server or client process.
2552 In Emacs, network connections are represented by process objects, so
2553 input and output work as for subprocesses and `delete-process' closes
2554 a network connection. However, a network process has no process id,
2555 it cannot be signalled, and the status codes are different from normal
2558 Arguments are specified as keyword/argument pairs. The following
2559 arguments are defined:
2561 :name NAME -- NAME is name for process. It is modified if necessary
2564 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2565 with the process. Process output goes at end of that buffer, unless
2566 you specify an output stream or filter function to handle the output.
2567 BUFFER may be also nil, meaning that this process is not associated
2570 :host HOST -- HOST is name of the host to connect to, or its IP
2571 address. The symbol `local' specifies the local host. If specified
2572 for a server process, it must be a valid name or address for the local
2573 host, and only clients connecting to that address will be accepted.
2575 :service SERVICE -- SERVICE is name of the service desired, or an
2576 integer specifying a port number to connect to. If SERVICE is t,
2577 a random port number is selected for the server.
2579 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2580 stream type connection, `datagram' creates a datagram type connection.
2582 :family FAMILY -- FAMILY is the address (and protocol) family for the
2583 service specified by HOST and SERVICE. The default address family is
2584 Inet (or IPv4) for the host and port number specified by HOST and
2585 SERVICE. Other address families supported are:
2586 local -- for a local (i.e. UNIX) address specified by SERVICE.
2588 :local ADDRESS -- ADDRESS is the local address used for the connection.
2589 This parameter is ignored when opening a client process. When specified
2590 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2592 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2593 connection. This parameter is ignored when opening a stream server
2594 process. For a datagram server process, it specifies the initial
2595 setting of the remote datagram address. When specified for a client
2596 process, the FAMILY, HOST, and SERVICE args are ignored.
2598 The format of ADDRESS depends on the address family:
2599 - An IPv4 address is represented as an vector of integers [A B C D P]
2600 corresponding to numeric IP address A.B.C.D and port number P.
2601 - A local address is represented as a string with the address in the
2602 local address space.
2603 - An "unsupported family" address is represented by a cons (F . AV)
2604 where F is the family number and AV is a vector containing the socket
2605 address data with one element per address data byte. Do not rely on
2606 this format in portable code, as it may depend on implementation
2607 defined constants, data sizes, and data structure alignment.
2609 :coding CODING -- If CODING is a symbol, it specifies the coding
2610 system used for both reading and writing for this process. If CODING
2611 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2612 ENCODING is used for writing.
2614 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2615 return without waiting for the connection to complete; instead, the
2616 sentinel function will be called with second arg matching "open" (if
2617 successful) or "failed" when the connect completes. Default is to use
2618 a blocking connect (i.e. wait) for stream type connections.
2620 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2621 running when Emacs is exited.
2623 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2624 In the stopped state, a server process does not accept new
2625 connections, and a client process does not handle incoming traffic.
2626 The stopped state is cleared by `continue-process' and set by
2629 :filter FILTER -- Install FILTER as the process filter.
2631 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2632 process filter are multibyte, otherwise they are unibyte.
2633 If this keyword is not specified, the strings are multibyte iff
2634 `default-enable-multibyte-characters' is non-nil.
2636 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2638 :log LOG -- Install LOG as the server process log function. This
2639 function is called when the server accepts a network connection from a
2640 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2641 is the server process, CLIENT is the new process for the connection,
2642 and MESSAGE is a string.
2644 :plist PLIST -- Install PLIST as the new process' initial plist.
2646 :server QLEN -- if QLEN is non-nil, create a server process for the
2647 specified FAMILY, SERVICE, and connection type (stream or datagram).
2648 If QLEN is an integer, it is used as the max. length of the server's
2649 pending connection queue (also known as the backlog); the default
2650 queue length is 5. Default is to create a client process.
2652 The following network options can be specified for this connection:
2654 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2655 :dontroute BOOL -- Only send to directly connected hosts.
2656 :keepalive BOOL -- Send keep-alive messages on network stream.
2657 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2658 :oobinline BOOL -- Place out-of-band data in receive data stream.
2659 :priority INT -- Set protocol defined priority for sent packets.
2660 :reuseaddr BOOL -- Allow reusing a recently used local address
2661 (this is allowed by default for a server process).
2662 :bindtodevice NAME -- bind to interface NAME. Using this may require
2663 special privileges on some systems.
2665 Consult the relevant system programmer's manual pages for more
2666 information on using these options.
2669 A server process will listen for and accept connections from clients.
2670 When a client connection is accepted, a new network process is created
2671 for the connection with the following parameters:
2673 - The client's process name is constructed by concatenating the server
2674 process' NAME and a client identification string.
2675 - If the FILTER argument is non-nil, the client process will not get a
2676 separate process buffer; otherwise, the client's process buffer is a newly
2677 created buffer named after the server process' BUFFER name or process
2678 NAME concatenated with the client identification string.
2679 - The connection type and the process filter and sentinel parameters are
2680 inherited from the server process' TYPE, FILTER and SENTINEL.
2681 - The client process' contact info is set according to the client's
2682 addressing information (typically an IP address and a port number).
2683 - The client process' plist is initialized from the server's plist.
2685 Notice that the FILTER and SENTINEL args are never used directly by
2686 the server process. Also, the BUFFER argument is not used directly by
2687 the server process, but via the optional :log function, accepted (and
2688 failed) connections may be logged in the server process' buffer.
2690 The original argument list, modified with the actual connection
2691 information, is available via the `process-contact' function.
2693 usage: (make-network-process &rest ARGS) */)
2699 Lisp_Object contact
;
2700 struct Lisp_Process
*p
;
2701 #ifdef HAVE_GETADDRINFO
2702 struct addrinfo ai
, *res
, *lres
;
2703 struct addrinfo hints
;
2704 char *portstring
, portbuf
[128];
2705 #else /* HAVE_GETADDRINFO */
2706 struct _emacs_addrinfo
2712 struct sockaddr
*ai_addr
;
2713 struct _emacs_addrinfo
*ai_next
;
2715 #endif /* HAVE_GETADDRINFO */
2716 struct sockaddr_in address_in
;
2717 #ifdef HAVE_LOCAL_SOCKETS
2718 struct sockaddr_un address_un
;
2723 int s
= -1, outch
, inch
;
2724 struct gcpro gcpro1
;
2725 int count
= SPECPDL_INDEX ();
2727 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2729 Lisp_Object name
, buffer
, host
, service
, address
;
2730 Lisp_Object filter
, sentinel
;
2731 int is_non_blocking_client
= 0;
2732 int is_server
= 0, backlog
= 5;
2739 /* Save arguments for process-contact and clone-process. */
2740 contact
= Flist (nargs
, args
);
2744 /* Ensure socket support is loaded if available. */
2745 init_winsock (TRUE
);
2748 /* :type TYPE (nil: stream, datagram */
2749 tem
= Fplist_get (contact
, QCtype
);
2751 socktype
= SOCK_STREAM
;
2752 #ifdef DATAGRAM_SOCKETS
2753 else if (EQ (tem
, Qdatagram
))
2754 socktype
= SOCK_DGRAM
;
2757 error ("Unsupported connection type");
2760 tem
= Fplist_get (contact
, QCserver
);
2763 /* Don't support network sockets when non-blocking mode is
2764 not available, since a blocked Emacs is not useful. */
2765 #if defined(TERM) || (!defined(O_NONBLOCK) && !defined(O_NDELAY))
2766 error ("Network servers not supported");
2770 backlog
= XINT (tem
);
2774 /* Make QCaddress an alias for :local (server) or :remote (client). */
2775 QCaddress
= is_server
? QClocal
: QCremote
;
2778 if (!is_server
&& socktype
== SOCK_STREAM
2779 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2781 #ifndef NON_BLOCKING_CONNECT
2782 error ("Non-blocking connect not supported");
2784 is_non_blocking_client
= 1;
2788 name
= Fplist_get (contact
, QCname
);
2789 buffer
= Fplist_get (contact
, QCbuffer
);
2790 filter
= Fplist_get (contact
, QCfilter
);
2791 sentinel
= Fplist_get (contact
, QCsentinel
);
2793 CHECK_STRING (name
);
2796 /* Let's handle TERM before things get complicated ... */
2797 host
= Fplist_get (contact
, QChost
);
2798 CHECK_STRING (host
);
2800 service
= Fplist_get (contact
, QCservice
);
2801 if (INTEGERP (service
))
2802 port
= htons ((unsigned short) XINT (service
));
2805 struct servent
*svc_info
;
2806 CHECK_STRING (service
);
2807 svc_info
= getservbyname (SDATA (service
), "tcp");
2809 error ("Unknown service: %s", SDATA (service
));
2810 port
= svc_info
->s_port
;
2813 s
= connect_server (0);
2815 report_file_error ("error creating socket", Fcons (name
, Qnil
));
2816 send_command (s
, C_PORT
, 0, "%s:%d", SDATA (host
), ntohs (port
));
2817 send_command (s
, C_DUMB
, 1, 0);
2819 #else /* not TERM */
2821 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2822 ai
.ai_socktype
= socktype
;
2827 /* :local ADDRESS or :remote ADDRESS */
2828 address
= Fplist_get (contact
, QCaddress
);
2829 if (!NILP (address
))
2831 host
= service
= Qnil
;
2833 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
2834 error ("Malformed :address");
2835 ai
.ai_family
= family
;
2836 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
2837 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
2841 /* :family FAMILY -- nil (for Inet), local, or integer. */
2842 tem
= Fplist_get (contact
, QCfamily
);
2844 family
= XINT (tem
);
2849 #ifdef HAVE_LOCAL_SOCKETS
2850 else if (EQ (tem
, Qlocal
))
2855 error ("Unknown address family");
2856 ai
.ai_family
= family
;
2858 /* :service SERVICE -- string, integer (port number), or t (random port). */
2859 service
= Fplist_get (contact
, QCservice
);
2861 #ifdef HAVE_LOCAL_SOCKETS
2862 if (family
== AF_LOCAL
)
2864 /* Host is not used. */
2866 CHECK_STRING (service
);
2867 bzero (&address_un
, sizeof address_un
);
2868 address_un
.sun_family
= AF_LOCAL
;
2869 strncpy (address_un
.sun_path
, SDATA (service
), sizeof address_un
.sun_path
);
2870 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
2871 ai
.ai_addrlen
= sizeof address_un
;
2876 /* :host HOST -- hostname, ip address, or 'local for localhost. */
2877 host
= Fplist_get (contact
, QChost
);
2880 if (EQ (host
, Qlocal
))
2881 host
= build_string ("localhost");
2882 CHECK_STRING (host
);
2885 /* Slow down polling to every ten seconds.
2886 Some kernels have a bug which causes retrying connect to fail
2887 after a connect. Polling can interfere with gethostbyname too. */
2888 #ifdef POLL_FOR_INPUT
2889 if (socktype
== SOCK_STREAM
)
2891 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
2892 bind_polling_period (10);
2896 #ifdef HAVE_GETADDRINFO
2897 /* If we have a host, use getaddrinfo to resolve both host and service.
2898 Otherwise, use getservbyname to lookup the service. */
2902 /* SERVICE can either be a string or int.
2903 Convert to a C string for later use by getaddrinfo. */
2904 if (EQ (service
, Qt
))
2906 else if (INTEGERP (service
))
2908 sprintf (portbuf
, "%ld", (long) XINT (service
));
2909 portstring
= portbuf
;
2913 CHECK_STRING (service
);
2914 portstring
= SDATA (service
);
2919 memset (&hints
, 0, sizeof (hints
));
2921 hints
.ai_family
= NILP (Fplist_member (contact
, QCfamily
)) ? AF_UNSPEC
: family
;
2922 hints
.ai_socktype
= socktype
;
2923 hints
.ai_protocol
= 0;
2924 ret
= getaddrinfo (SDATA (host
), portstring
, &hints
, &res
);
2926 #ifdef HAVE_GAI_STRERROR
2927 error ("%s/%s %s", SDATA (host
), portstring
, gai_strerror(ret
));
2929 error ("%s/%s getaddrinfo error %d", SDATA (host
), portstring
, ret
);
2935 #endif /* HAVE_GETADDRINFO */
2937 /* We end up here if getaddrinfo is not defined, or in case no hostname
2938 has been specified (e.g. for a local server process). */
2940 if (EQ (service
, Qt
))
2942 else if (INTEGERP (service
))
2943 port
= htons ((unsigned short) XINT (service
));
2946 struct servent
*svc_info
;
2947 CHECK_STRING (service
);
2948 svc_info
= getservbyname (SDATA (service
),
2949 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
2951 error ("Unknown service: %s", SDATA (service
));
2952 port
= svc_info
->s_port
;
2955 bzero (&address_in
, sizeof address_in
);
2956 address_in
.sin_family
= family
;
2957 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
2958 address_in
.sin_port
= port
;
2960 #ifndef HAVE_GETADDRINFO
2963 struct hostent
*host_info_ptr
;
2965 /* gethostbyname may fail with TRY_AGAIN, but we don't honour that,
2966 as it may `hang' Emacs for a very long time. */
2969 host_info_ptr
= gethostbyname (SDATA (host
));
2974 bcopy (host_info_ptr
->h_addr
, (char *) &address_in
.sin_addr
,
2975 host_info_ptr
->h_length
);
2976 family
= host_info_ptr
->h_addrtype
;
2977 address_in
.sin_family
= family
;
2980 /* Attempt to interpret host as numeric inet address */
2982 IN_ADDR numeric_addr
;
2983 numeric_addr
= inet_addr ((char *) SDATA (host
));
2984 if (NUMERIC_ADDR_ERROR
)
2985 error ("Unknown host \"%s\"", SDATA (host
));
2987 bcopy ((char *)&numeric_addr
, (char *) &address_in
.sin_addr
,
2988 sizeof (address_in
.sin_addr
));
2992 #endif /* not HAVE_GETADDRINFO */
2994 ai
.ai_family
= family
;
2995 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
2996 ai
.ai_addrlen
= sizeof address_in
;
3000 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
3001 when connect is interrupted. So let's not let it get interrupted.
3002 Note we do not turn off polling, because polling is only used
3003 when not interrupt_input, and thus not normally used on the systems
3004 which have this bug. On systems which use polling, there's no way
3005 to quit if polling is turned off. */
3007 && !is_server
&& socktype
== SOCK_STREAM
)
3009 /* Comment from KFS: The original open-network-stream code
3010 didn't unwind protect this, but it seems like the proper
3011 thing to do. In any case, I don't see how it could harm to
3012 do this -- and it makes cleanup (using unbind_to) easier. */
3013 record_unwind_protect (unwind_request_sigio
, Qnil
);
3017 /* Do this in case we never enter the for-loop below. */
3018 count1
= SPECPDL_INDEX ();
3021 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3027 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3034 #ifdef DATAGRAM_SOCKETS
3035 if (!is_server
&& socktype
== SOCK_DGRAM
)
3037 #endif /* DATAGRAM_SOCKETS */
3039 #ifdef NON_BLOCKING_CONNECT
3040 if (is_non_blocking_client
)
3043 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3045 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3057 /* Make us close S if quit. */
3058 record_unwind_protect (close_file_unwind
, make_number (s
));
3060 /* Parse network options in the arg list.
3061 We simply ignore anything which isn't a known option (including other keywords).
3062 An error is signalled if setting a known option fails. */
3063 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3064 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3068 /* Configure as a server socket. */
3070 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3071 explicit :reuseaddr key to override this. */
3072 #ifdef HAVE_LOCAL_SOCKETS
3073 if (family
!= AF_LOCAL
)
3075 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3078 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3079 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3082 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3083 report_file_error ("Cannot bind server socket", Qnil
);
3085 #ifdef HAVE_GETSOCKNAME
3086 if (EQ (service
, Qt
))
3088 struct sockaddr_in sa1
;
3089 int len1
= sizeof (sa1
);
3090 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3092 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3093 service
= make_number (ntohs (sa1
.sin_port
));
3094 contact
= Fplist_put (contact
, QCservice
, service
);
3099 if (socktype
== SOCK_STREAM
&& listen (s
, backlog
))
3100 report_file_error ("Cannot listen on server socket", Qnil
);
3108 /* This turns off all alarm-based interrupts; the
3109 bind_polling_period call above doesn't always turn all the
3110 short-interval ones off, especially if interrupt_input is
3113 It'd be nice to be able to control the connect timeout
3114 though. Would non-blocking connect calls be portable?
3116 This used to be conditioned by HAVE_GETADDRINFO. Why? */
3118 turn_on_atimers (0);
3120 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3123 turn_on_atimers (1);
3125 if (ret
== 0 || xerrno
== EISCONN
)
3127 /* The unwind-protect will be discarded afterwards.
3128 Likewise for immediate_quit. */
3132 #ifdef NON_BLOCKING_CONNECT
3134 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3138 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3146 /* Discard the unwind protect closing S. */
3147 specpdl_ptr
= specpdl
+ count1
;
3151 if (xerrno
== EINTR
)
3157 #ifdef DATAGRAM_SOCKETS
3158 if (socktype
== SOCK_DGRAM
)
3160 if (datagram_address
[s
].sa
)
3162 datagram_address
[s
].sa
= (struct sockaddr
*) xmalloc (lres
->ai_addrlen
);
3163 datagram_address
[s
].len
= lres
->ai_addrlen
;
3167 bzero (datagram_address
[s
].sa
, lres
->ai_addrlen
);
3168 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3171 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3172 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3173 conv_lisp_to_sockaddr (rfamily
, remote
,
3174 datagram_address
[s
].sa
, rlen
);
3178 bcopy (lres
->ai_addr
, datagram_address
[s
].sa
, lres
->ai_addrlen
);
3181 contact
= Fplist_put (contact
, QCaddress
,
3182 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3183 #ifdef HAVE_GETSOCKNAME
3186 struct sockaddr_in sa1
;
3187 int len1
= sizeof (sa1
);
3188 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3189 contact
= Fplist_put (contact
, QClocal
,
3190 conv_sockaddr_to_lisp (&sa1
, len1
));
3195 #ifdef HAVE_GETADDRINFO
3202 /* Discard the unwind protect for closing S, if any. */
3203 specpdl_ptr
= specpdl
+ count1
;
3205 /* Unwind bind_polling_period and request_sigio. */
3206 unbind_to (count
, Qnil
);
3210 /* If non-blocking got this far - and failed - assume non-blocking is
3211 not supported after all. This is probably a wrong assumption, but
3212 the normal blocking calls to open-network-stream handles this error
3214 if (is_non_blocking_client
)
3219 report_file_error ("make server process failed", contact
);
3221 report_file_error ("make client process failed", contact
);
3224 #endif /* not TERM */
3230 buffer
= Fget_buffer_create (buffer
);
3231 proc
= make_process (name
);
3233 chan_process
[inch
] = proc
;
3236 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3239 fcntl (inch
, F_SETFL
, O_NDELAY
);
3243 p
= XPROCESS (proc
);
3245 p
->childp
= contact
;
3246 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
3249 p
->sentinel
= sentinel
;
3251 p
->filter_multibyte
= buffer_defaults
.enable_multibyte_characters
;
3252 /* Override the above only if :filter-multibyte is specified. */
3253 if (! NILP (Fplist_member (contact
, QCfilter_multibyte
)))
3254 p
->filter_multibyte
= Fplist_get (contact
, QCfilter_multibyte
);
3255 p
->log
= Fplist_get (contact
, QClog
);
3256 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3257 p
->kill_without_query
= Qt
;
3258 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3261 XSETINT (p
->infd
, inch
);
3262 XSETINT (p
->outfd
, outch
);
3263 if (is_server
&& socktype
== SOCK_STREAM
)
3264 p
->status
= Qlisten
;
3266 #ifdef NON_BLOCKING_CONNECT
3267 if (is_non_blocking_client
)
3269 /* We may get here if connect did succeed immediately. However,
3270 in that case, we still need to signal this like a non-blocking
3272 p
->status
= Qconnect
;
3273 if (!FD_ISSET (inch
, &connect_wait_mask
))
3275 FD_SET (inch
, &connect_wait_mask
);
3276 num_pending_connects
++;
3281 /* A server may have a client filter setting of Qt, but it must
3282 still listen for incoming connects unless it is stopped. */
3283 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3284 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3286 FD_SET (inch
, &input_wait_mask
);
3287 FD_SET (inch
, &non_keyboard_wait_mask
);
3290 if (inch
> max_process_desc
)
3291 max_process_desc
= inch
;
3293 tem
= Fplist_member (contact
, QCcoding
);
3294 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3295 tem
= Qnil
; /* No error message (too late!). */
3298 /* Setup coding systems for communicating with the network stream. */
3299 struct gcpro gcpro1
;
3300 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3301 Lisp_Object coding_systems
= Qt
;
3302 Lisp_Object args
[5], val
;
3306 val
= XCAR (XCDR (tem
));
3310 else if (!NILP (Vcoding_system_for_read
))
3311 val
= Vcoding_system_for_read
;
3312 else if ((!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
))
3313 || (NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
)))
3314 /* We dare not decode end-of-line format by setting VAL to
3315 Qraw_text, because the existing Emacs Lisp libraries
3316 assume that they receive bare code including a sequene of
3321 if (NILP (host
) || NILP (service
))
3322 coding_systems
= Qnil
;
3325 args
[0] = Qopen_network_stream
, args
[1] = name
,
3326 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3328 coding_systems
= Ffind_operation_coding_system (5, args
);
3331 if (CONSP (coding_systems
))
3332 val
= XCAR (coding_systems
);
3333 else if (CONSP (Vdefault_process_coding_system
))
3334 val
= XCAR (Vdefault_process_coding_system
);
3338 p
->decode_coding_system
= val
;
3342 val
= XCAR (XCDR (tem
));
3346 else if (!NILP (Vcoding_system_for_write
))
3347 val
= Vcoding_system_for_write
;
3348 else if (NILP (current_buffer
->enable_multibyte_characters
))
3352 if (EQ (coding_systems
, Qt
))
3354 if (NILP (host
) || NILP (service
))
3355 coding_systems
= Qnil
;
3358 args
[0] = Qopen_network_stream
, args
[1] = name
,
3359 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3361 coding_systems
= Ffind_operation_coding_system (5, args
);
3365 if (CONSP (coding_systems
))
3366 val
= XCDR (coding_systems
);
3367 else if (CONSP (Vdefault_process_coding_system
))
3368 val
= XCDR (Vdefault_process_coding_system
);
3372 p
->encode_coding_system
= val
;
3374 setup_process_coding_systems (proc
);
3376 p
->decoding_buf
= make_uninit_string (0);
3377 p
->decoding_carryover
= make_number (0);
3378 p
->encoding_buf
= make_uninit_string (0);
3379 p
->encoding_carryover
= make_number (0);
3381 p
->inherit_coding_system_flag
3382 = (!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
3388 #endif /* HAVE_SOCKETS */
3391 #if defined(HAVE_SOCKETS) && defined(HAVE_NET_IF_H) && defined(HAVE_SYS_IOCTL_H)
3394 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3395 doc
: /* Return an alist of all network interfaces and their network address.
3396 Each element is a cons, the car of which is a string containing the
3397 interface name, and the cdr is the network address in internal
3398 format; see the description of ADDRESS in `make-network-process'. */)
3401 struct ifconf ifconf
;
3402 struct ifreq
*ifreqs
= NULL
;
3407 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3413 buf_size
= ifaces
* sizeof(ifreqs
[0]);
3414 ifreqs
= (struct ifreq
*)xrealloc(ifreqs
, buf_size
);
3421 ifconf
.ifc_len
= buf_size
;
3422 ifconf
.ifc_req
= ifreqs
;
3423 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3429 if (ifconf
.ifc_len
== buf_size
)
3433 ifaces
= ifconf
.ifc_len
/ sizeof (ifreqs
[0]);
3436 while (--ifaces
>= 0)
3438 struct ifreq
*ifq
= &ifreqs
[ifaces
];
3439 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3440 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3442 bcopy (ifq
->ifr_name
, namebuf
, sizeof (ifq
->ifr_name
));
3443 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3444 res
= Fcons (Fcons (build_string (namebuf
),
3445 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3446 sizeof (struct sockaddr
))),
3452 #endif /* SIOCGIFCONF */
3454 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
3461 static struct ifflag_def ifflag_table
[] = {
3465 #ifdef IFF_BROADCAST
3466 { IFF_BROADCAST
, "broadcast" },
3469 { IFF_DEBUG
, "debug" },
3472 { IFF_LOOPBACK
, "loopback" },
3474 #ifdef IFF_POINTOPOINT
3475 { IFF_POINTOPOINT
, "pointopoint" },
3478 { IFF_RUNNING
, "running" },
3481 { IFF_NOARP
, "noarp" },
3484 { IFF_PROMISC
, "promisc" },
3486 #ifdef IFF_NOTRAILERS
3487 { IFF_NOTRAILERS
, "notrailers" },
3490 { IFF_ALLMULTI
, "allmulti" },
3493 { IFF_MASTER
, "master" },
3496 { IFF_SLAVE
, "slave" },
3498 #ifdef IFF_MULTICAST
3499 { IFF_MULTICAST
, "multicast" },
3502 { IFF_PORTSEL
, "portsel" },
3504 #ifdef IFF_AUTOMEDIA
3505 { IFF_AUTOMEDIA
, "automedia" },
3508 { IFF_DYNAMIC
, "dynamic" },
3513 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3514 doc
: /* Return information about network interface named IFNAME.
3515 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3516 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3517 NETMASK is the layer 3 network mask, HWADDR is the layer 2 addres, and
3518 FLAGS is the current flags of the interface. */)
3523 Lisp_Object res
= Qnil
;
3528 CHECK_STRING (ifname
);
3530 bzero (rq
.ifr_name
, sizeof rq
.ifr_name
);
3531 strncpy (rq
.ifr_name
, SDATA (ifname
), sizeof (rq
.ifr_name
));
3533 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3538 #if defined(SIOCGIFFLAGS) && defined(HAVE_STRUCT_IFREQ_IFR_FLAGS)
3539 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3541 int flags
= rq
.ifr_flags
;
3542 struct ifflag_def
*fp
;
3546 for (fp
= ifflag_table
; flags
!= 0 && fp
; fp
++)
3548 if (flags
& fp
->flag_bit
)
3550 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3551 flags
-= fp
->flag_bit
;
3554 for (fnum
= 0; flags
&& fnum
< 32; fnum
++)
3556 if (flags
& (1 << fnum
))
3558 elt
= Fcons (make_number (fnum
), elt
);
3563 res
= Fcons (elt
, res
);
3566 #if defined(SIOCGIFHWADDR) && defined(HAVE_STRUCT_IFREQ_IFR_HWADDR)
3567 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3569 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3570 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3574 for (n
= 0; n
< 6; n
++)
3575 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3576 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3579 res
= Fcons (elt
, res
);
3582 #if defined(SIOCGIFNETMASK) && defined(ifr_netmask)
3583 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3586 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3589 res
= Fcons (elt
, res
);
3592 #if defined(SIOCGIFBRDADDR) && defined(HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3593 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3596 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3599 res
= Fcons (elt
, res
);
3602 #if defined(SIOCGIFADDR) && defined(HAVE_STRUCT_IFREQ_IFR_ADDR)
3603 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3606 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3609 res
= Fcons (elt
, res
);
3613 return any
? res
: Qnil
;
3616 #endif /* HAVE_SOCKETS */
3618 /* Turn off input and output for process PROC. */
3621 deactivate_process (proc
)
3624 register int inchannel
, outchannel
;
3625 register struct Lisp_Process
*p
= XPROCESS (proc
);
3627 inchannel
= XINT (p
->infd
);
3628 outchannel
= XINT (p
->outfd
);
3630 #ifdef ADAPTIVE_READ_BUFFERING
3631 if (XINT (p
->read_output_delay
) > 0)
3633 if (--process_output_delay_count
< 0)
3634 process_output_delay_count
= 0;
3635 XSETINT (p
->read_output_delay
, 0);
3636 p
->read_output_skip
= Qnil
;
3642 /* Beware SIGCHLD hereabouts. */
3643 flush_pending_output (inchannel
);
3646 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
3647 sys$
dassgn (outchannel
);
3648 vs
= get_vms_process_pointer (p
->pid
);
3650 give_back_vms_process_stuff (vs
);
3653 emacs_close (inchannel
);
3654 if (outchannel
>= 0 && outchannel
!= inchannel
)
3655 emacs_close (outchannel
);
3658 XSETINT (p
->infd
, -1);
3659 XSETINT (p
->outfd
, -1);
3660 #ifdef DATAGRAM_SOCKETS
3661 if (DATAGRAM_CHAN_P (inchannel
))
3663 xfree (datagram_address
[inchannel
].sa
);
3664 datagram_address
[inchannel
].sa
= 0;
3665 datagram_address
[inchannel
].len
= 0;
3668 chan_process
[inchannel
] = Qnil
;
3669 FD_CLR (inchannel
, &input_wait_mask
);
3670 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3671 #ifdef NON_BLOCKING_CONNECT
3672 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3674 FD_CLR (inchannel
, &connect_wait_mask
);
3675 if (--num_pending_connects
< 0)
3679 if (inchannel
== max_process_desc
)
3682 /* We just closed the highest-numbered process input descriptor,
3683 so recompute the highest-numbered one now. */
3684 max_process_desc
= 0;
3685 for (i
= 0; i
< MAXDESC
; i
++)
3686 if (!NILP (chan_process
[i
]))
3687 max_process_desc
= i
;
3692 /* Close all descriptors currently in use for communication
3693 with subprocess. This is used in a newly-forked subprocess
3694 to get rid of irrelevant descriptors. */
3697 close_process_descs ()
3701 for (i
= 0; i
< MAXDESC
; i
++)
3703 Lisp_Object process
;
3704 process
= chan_process
[i
];
3705 if (!NILP (process
))
3707 int in
= XINT (XPROCESS (process
)->infd
);
3708 int out
= XINT (XPROCESS (process
)->outfd
);
3711 if (out
>= 0 && in
!= out
)
3718 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3720 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3721 It is read into the process' buffers or given to their filter functions.
3722 Non-nil arg PROCESS means do not return until some output has been received
3724 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of
3725 seconds and microseconds to wait; return after that much time whether
3726 or not there is input.
3727 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
3728 from PROCESS, suspending reading output from other processes.
3729 If JUST-THIS-ONE is an integer, don't run any timers either.
3730 Return non-nil iff we received any output before the timeout expired. */)
3731 (process
, timeout
, timeout_msecs
, just_this_one
)
3732 register Lisp_Object process
, timeout
, timeout_msecs
, just_this_one
;
3737 if (! NILP (process
))
3738 CHECK_PROCESS (process
);
3740 just_this_one
= Qnil
;
3742 if (! NILP (timeout_msecs
))
3744 CHECK_NUMBER (timeout_msecs
);
3745 useconds
= XINT (timeout_msecs
);
3746 if (!INTEGERP (timeout
))
3747 XSETINT (timeout
, 0);
3750 int carry
= useconds
/ 1000000;
3752 XSETINT (timeout
, XINT (timeout
) + carry
);
3753 useconds
-= carry
* 1000000;
3755 /* I think this clause is necessary because C doesn't
3756 guarantee a particular rounding direction for negative
3760 XSETINT (timeout
, XINT (timeout
) - 1);
3761 useconds
+= 1000000;
3768 if (! NILP (timeout
))
3770 CHECK_NUMBER (timeout
);
3771 seconds
= XINT (timeout
);
3772 if (seconds
< 0 || (seconds
== 0 && useconds
== 0))
3776 seconds
= NILP (process
) ? -1 : 0;
3779 (wait_reading_process_output (seconds
, useconds
, 0, 0,
3781 !NILP (process
) ? XPROCESS (process
) : NULL
,
3782 NILP (just_this_one
) ? 0 :
3783 !INTEGERP (just_this_one
) ? 1 : -1)
3787 /* Accept a connection for server process SERVER on CHANNEL. */
3789 static int connect_counter
= 0;
3792 server_accept_connection (server
, channel
)
3796 Lisp_Object proc
, caller
, name
, buffer
;
3797 Lisp_Object contact
, host
, service
;
3798 struct Lisp_Process
*ps
= XPROCESS (server
);
3799 struct Lisp_Process
*p
;
3803 struct sockaddr_in in
;
3804 #ifdef HAVE_LOCAL_SOCKETS
3805 struct sockaddr_un un
;
3808 int len
= sizeof saddr
;
3810 s
= accept (channel
, &saddr
.sa
, &len
);
3819 if (code
== EWOULDBLOCK
)
3823 if (!NILP (ps
->log
))
3824 call3 (ps
->log
, server
, Qnil
,
3825 concat3 (build_string ("accept failed with code"),
3826 Fnumber_to_string (make_number (code
)),
3827 build_string ("\n")));
3833 /* Setup a new process to handle the connection. */
3835 /* Generate a unique identification of the caller, and build contact
3836 information for this process. */
3839 switch (saddr
.sa
.sa_family
)
3843 Lisp_Object args
[5];
3844 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
3845 args
[0] = build_string ("%d.%d.%d.%d");
3846 args
[1] = make_number (*ip
++);
3847 args
[2] = make_number (*ip
++);
3848 args
[3] = make_number (*ip
++);
3849 args
[4] = make_number (*ip
++);
3850 host
= Fformat (5, args
);
3851 service
= make_number (ntohs (saddr
.in
.sin_port
));
3853 args
[0] = build_string (" <%s:%d>");
3856 caller
= Fformat (3, args
);
3860 #ifdef HAVE_LOCAL_SOCKETS
3864 caller
= Fnumber_to_string (make_number (connect_counter
));
3865 caller
= concat3 (build_string (" <*"), caller
, build_string ("*>"));
3869 /* Create a new buffer name for this process if it doesn't have a
3870 filter. The new buffer name is based on the buffer name or
3871 process name of the server process concatenated with the caller
3874 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
3878 buffer
= ps
->buffer
;
3880 buffer
= Fbuffer_name (buffer
);
3885 buffer
= concat2 (buffer
, caller
);
3886 buffer
= Fget_buffer_create (buffer
);
3890 /* Generate a unique name for the new server process. Combine the
3891 server process name with the caller identification. */
3893 name
= concat2 (ps
->name
, caller
);
3894 proc
= make_process (name
);
3896 chan_process
[s
] = proc
;
3899 fcntl (s
, F_SETFL
, O_NONBLOCK
);
3902 fcntl (s
, F_SETFL
, O_NDELAY
);
3906 p
= XPROCESS (proc
);
3908 /* Build new contact information for this setup. */
3909 contact
= Fcopy_sequence (ps
->childp
);
3910 contact
= Fplist_put (contact
, QCserver
, Qnil
);
3911 contact
= Fplist_put (contact
, QChost
, host
);
3912 if (!NILP (service
))
3913 contact
= Fplist_put (contact
, QCservice
, service
);
3914 contact
= Fplist_put (contact
, QCremote
,
3915 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
3916 #ifdef HAVE_GETSOCKNAME
3918 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
3919 contact
= Fplist_put (contact
, QClocal
,
3920 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
3923 p
->childp
= contact
;
3924 p
->plist
= Fcopy_sequence (ps
->plist
);
3927 p
->sentinel
= ps
->sentinel
;
3928 p
->filter
= ps
->filter
;
3931 XSETINT (p
->infd
, s
);
3932 XSETINT (p
->outfd
, s
);
3935 /* Client processes for accepted connections are not stopped initially. */
3936 if (!EQ (p
->filter
, Qt
))
3938 FD_SET (s
, &input_wait_mask
);
3939 FD_SET (s
, &non_keyboard_wait_mask
);
3942 if (s
> max_process_desc
)
3943 max_process_desc
= s
;
3945 /* Setup coding system for new process based on server process.
3946 This seems to be the proper thing to do, as the coding system
3947 of the new process should reflect the settings at the time the
3948 server socket was opened; not the current settings. */
3950 p
->decode_coding_system
= ps
->decode_coding_system
;
3951 p
->encode_coding_system
= ps
->encode_coding_system
;
3952 setup_process_coding_systems (proc
);
3954 p
->decoding_buf
= make_uninit_string (0);
3955 p
->decoding_carryover
= make_number (0);
3956 p
->encoding_buf
= make_uninit_string (0);
3957 p
->encoding_carryover
= make_number (0);
3959 p
->inherit_coding_system_flag
3960 = (NILP (buffer
) ? Qnil
: ps
->inherit_coding_system_flag
);
3962 if (!NILP (ps
->log
))
3963 call3 (ps
->log
, server
, proc
,
3964 concat3 (build_string ("accept from "),
3965 (STRINGP (host
) ? host
: build_string ("-")),
3966 build_string ("\n")));
3968 if (!NILP (p
->sentinel
))
3969 exec_sentinel (proc
,
3970 concat3 (build_string ("open from "),
3971 (STRINGP (host
) ? host
: build_string ("-")),
3972 build_string ("\n")));
3975 /* This variable is different from waiting_for_input in keyboard.c.
3976 It is used to communicate to a lisp process-filter/sentinel (via the
3977 function Fwaiting_for_user_input_p below) whether Emacs was waiting
3978 for user-input when that process-filter was called.
3979 waiting_for_input cannot be used as that is by definition 0 when
3980 lisp code is being evalled.
3981 This is also used in record_asynch_buffer_change.
3982 For that purpose, this must be 0
3983 when not inside wait_reading_process_output. */
3984 static int waiting_for_user_input_p
;
3986 /* This is here so breakpoints can be put on it. */
3988 wait_reading_process_output_1 ()
3992 /* Read and dispose of subprocess output while waiting for timeout to
3993 elapse and/or keyboard input to be available.
3996 timeout in seconds, or
3997 zero for no limit, or
3998 -1 means gobble data immediately available but don't wait for any.
4001 an additional duration to wait, measured in microseconds.
4002 If this is nonzero and time_limit is 0, then the timeout
4003 consists of MICROSECS only.
4005 READ_KBD is a lisp value:
4006 0 to ignore keyboard input, or
4007 1 to return when input is available, or
4008 -1 meaning caller will actually read the input, so don't throw to
4009 the quit handler, or
4011 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4012 output that arrives.
4014 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4015 (and gobble terminal input into the buffer if any arrives).
4017 If WAIT_PROC is specified, wait until something arrives from that
4018 process. The return value is true iff we read some input from
4021 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4022 (suspending output from other processes). A negative value
4023 means don't run any timers either.
4025 If WAIT_PROC is specified, then the function returns true iff we
4026 received input from that process before the timeout elapsed.
4027 Otherwise, return true iff we received input from any process. */
4030 wait_reading_process_output (time_limit
, microsecs
, read_kbd
, do_display
,
4031 wait_for_cell
, wait_proc
, just_wait_proc
)
4032 int time_limit
, microsecs
, read_kbd
, do_display
;
4033 Lisp_Object wait_for_cell
;
4034 struct Lisp_Process
*wait_proc
;
4037 register int channel
, nfds
;
4038 SELECT_TYPE Available
;
4039 #ifdef NON_BLOCKING_CONNECT
4040 SELECT_TYPE Connecting
;
4043 int check_delay
, no_avail
;
4046 EMACS_TIME timeout
, end_time
;
4047 int wait_channel
= -1;
4048 int got_some_input
= 0;
4049 /* Either nil or a cons cell, the car of which is of interest and
4050 may be changed outside of this routine. */
4051 int saved_waiting_for_user_input_p
= waiting_for_user_input_p
;
4053 FD_ZERO (&Available
);
4054 #ifdef NON_BLOCKING_CONNECT
4055 FD_ZERO (&Connecting
);
4058 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4059 if (wait_proc
!= NULL
)
4060 wait_channel
= XINT (wait_proc
->infd
);
4062 waiting_for_user_input_p
= read_kbd
;
4064 /* Since we may need to wait several times,
4065 compute the absolute time to return at. */
4066 if (time_limit
|| microsecs
)
4068 EMACS_GET_TIME (end_time
);
4069 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4070 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4072 #ifdef POLL_INTERRUPTED_SYS_CALL
4073 /* AlainF 5-Jul-1996
4074 HP-UX 10.10 seem to have problems with signals coming in
4075 Causes "poll: interrupted system call" messages when Emacs is run
4077 Turn off periodic alarms (in case they are in use),
4078 and then turn off any other atimers. */
4080 turn_on_atimers (0);
4081 #endif /* POLL_INTERRUPTED_SYS_CALL */
4085 int timeout_reduced_for_timers
= 0;
4087 /* If calling from keyboard input, do not quit
4088 since we want to return C-g as an input character.
4089 Otherwise, do pending quit if requested. */
4093 else if (interrupt_input_pending
)
4094 handle_async_input ();
4097 /* Exit now if the cell we're waiting for became non-nil. */
4098 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4101 /* Compute time from now till when time limit is up */
4102 /* Exit if already run out */
4103 if (time_limit
== -1)
4105 /* -1 specified for timeout means
4106 gobble output available now
4107 but don't wait at all. */
4109 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4111 else if (time_limit
|| microsecs
)
4113 EMACS_GET_TIME (timeout
);
4114 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4115 if (EMACS_TIME_NEG_P (timeout
))
4120 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4123 /* Normally we run timers here.
4124 But not if wait_for_cell; in those cases,
4125 the wait is supposed to be short,
4126 and those callers cannot handle running arbitrary Lisp code here. */
4127 if (NILP (wait_for_cell
)
4128 && just_wait_proc
>= 0)
4130 EMACS_TIME timer_delay
;
4134 int old_timers_run
= timers_run
;
4135 struct buffer
*old_buffer
= current_buffer
;
4137 timer_delay
= timer_check (1);
4139 /* If a timer has run, this might have changed buffers
4140 an alike. Make read_key_sequence aware of that. */
4141 if (timers_run
!= old_timers_run
4142 && old_buffer
!= current_buffer
4143 && waiting_for_user_input_p
== -1)
4144 record_asynch_buffer_change ();
4146 if (timers_run
!= old_timers_run
&& do_display
)
4147 /* We must retry, since a timer may have requeued itself
4148 and that could alter the time_delay. */
4149 redisplay_preserve_echo_area (9);
4153 while (!detect_input_pending ());
4155 /* If there is unread keyboard input, also return. */
4157 && requeued_events_pending_p ())
4160 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4162 EMACS_TIME difference
;
4163 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4164 if (EMACS_TIME_NEG_P (difference
))
4166 timeout
= timer_delay
;
4167 timeout_reduced_for_timers
= 1;
4170 /* If time_limit is -1, we are not going to wait at all. */
4171 else if (time_limit
!= -1)
4173 /* This is so a breakpoint can be put here. */
4174 wait_reading_process_output_1 ();
4178 /* Cause C-g and alarm signals to take immediate action,
4179 and cause input available signals to zero out timeout.
4181 It is important that we do this before checking for process
4182 activity. If we get a SIGCHLD after the explicit checks for
4183 process activity, timeout is the only way we will know. */
4185 set_waiting_for_input (&timeout
);
4187 /* If status of something has changed, and no input is
4188 available, notify the user of the change right away. After
4189 this explicit check, we'll let the SIGCHLD handler zap
4190 timeout to get our attention. */
4191 if (update_tick
!= process_tick
&& do_display
)
4194 #ifdef NON_BLOCKING_CONNECT
4198 Atemp
= input_wait_mask
;
4200 /* On Mac OS X 10.0, the SELECT system call always says input is
4201 present (for reading) at stdin, even when none is. This
4202 causes the call to SELECT below to return 1 and
4203 status_notify not to be called. As a result output of
4204 subprocesses are incorrectly discarded.
4208 IF_NON_BLOCKING_CONNECT (Ctemp
= connect_wait_mask
);
4210 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4211 if ((select (max (max_process_desc
, max_keyboard_desc
) + 1,
4213 #ifdef NON_BLOCKING_CONNECT
4214 (num_pending_connects
> 0 ? &Ctemp
: (SELECT_TYPE
*)0),
4218 (SELECT_TYPE
*)0, &timeout
)
4221 /* It's okay for us to do this and then continue with
4222 the loop, since timeout has already been zeroed out. */
4223 clear_waiting_for_input ();
4228 /* Don't wait for output from a non-running process. Just
4229 read whatever data has already been received. */
4230 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
4231 update_status (wait_proc
);
4233 && ! EQ (wait_proc
->status
, Qrun
)
4234 && ! EQ (wait_proc
->status
, Qconnect
))
4236 int nread
, total_nread
= 0;
4238 clear_waiting_for_input ();
4239 XSETPROCESS (proc
, wait_proc
);
4241 /* Read data from the process, until we exhaust it. */
4242 while (XINT (wait_proc
->infd
) >= 0)
4244 nread
= read_process_output (proc
, XINT (wait_proc
->infd
));
4250 total_nread
+= nread
;
4252 else if (nread
== -1 && EIO
== errno
)
4256 else if (nread
== -1 && EAGAIN
== errno
)
4260 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4264 if (total_nread
> 0 && do_display
)
4265 redisplay_preserve_echo_area (10);
4270 /* Wait till there is something to do */
4272 if (wait_proc
&& just_wait_proc
)
4274 if (XINT (wait_proc
->infd
) < 0) /* Terminated */
4276 FD_SET (XINT (wait_proc
->infd
), &Available
);
4278 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4280 else if (!NILP (wait_for_cell
))
4282 Available
= non_process_wait_mask
;
4284 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4289 Available
= non_keyboard_wait_mask
;
4291 Available
= input_wait_mask
;
4292 IF_NON_BLOCKING_CONNECT (check_connect
= (num_pending_connects
> 0));
4293 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4296 /* If frame size has changed or the window is newly mapped,
4297 redisplay now, before we start to wait. There is a race
4298 condition here; if a SIGIO arrives between now and the select
4299 and indicates that a frame is trashed, the select may block
4300 displaying a trashed screen. */
4301 if (frame_garbaged
&& do_display
)
4303 clear_waiting_for_input ();
4304 redisplay_preserve_echo_area (11);
4306 set_waiting_for_input (&timeout
);
4310 if (read_kbd
&& detect_input_pending ())
4317 #ifdef NON_BLOCKING_CONNECT
4319 Connecting
= connect_wait_mask
;
4322 #ifdef ADAPTIVE_READ_BUFFERING
4323 /* Set the timeout for adaptive read buffering if any
4324 process has non-nil read_output_skip and non-zero
4325 read_output_delay, and we are not reading output for a
4326 specific wait_channel. It is not executed if
4327 Vprocess_adaptive_read_buffering is nil. */
4328 if (process_output_skip
&& check_delay
> 0)
4330 int usecs
= EMACS_USECS (timeout
);
4331 if (EMACS_SECS (timeout
) > 0 || usecs
> READ_OUTPUT_DELAY_MAX
)
4332 usecs
= READ_OUTPUT_DELAY_MAX
;
4333 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4335 proc
= chan_process
[channel
];
4338 /* Find minimum non-zero read_output_delay among the
4339 processes with non-nil read_output_skip. */
4340 if (XINT (XPROCESS (proc
)->read_output_delay
) > 0)
4343 if (NILP (XPROCESS (proc
)->read_output_skip
))
4345 FD_CLR (channel
, &Available
);
4346 XPROCESS (proc
)->read_output_skip
= Qnil
;
4347 if (XINT (XPROCESS (proc
)->read_output_delay
) < usecs
)
4348 usecs
= XINT (XPROCESS (proc
)->read_output_delay
);
4351 EMACS_SET_SECS_USECS (timeout
, 0, usecs
);
4352 process_output_skip
= 0;
4356 nfds
= select (max (max_process_desc
, max_keyboard_desc
) + 1,
4358 #ifdef NON_BLOCKING_CONNECT
4359 (check_connect
? &Connecting
: (SELECT_TYPE
*)0),
4363 (SELECT_TYPE
*)0, &timeout
);
4368 /* Make C-g and alarm signals set flags again */
4369 clear_waiting_for_input ();
4371 /* If we woke up due to SIGWINCH, actually change size now. */
4372 do_pending_window_change (0);
4374 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4375 /* We wanted the full specified time, so return now. */
4379 if (xerrno
== EINTR
)
4382 /* Ultrix select seems to return ENOMEM when it is
4383 interrupted. Treat it just like EINTR. Bleah. Note
4384 that we want to test for the "ultrix" CPP symbol, not
4385 "__ultrix__"; the latter is only defined under GCC, but
4386 not by DEC's bundled CC. -JimB */
4387 else if (xerrno
== ENOMEM
)
4391 /* This happens for no known reason on ALLIANT.
4392 I am guessing that this is the right response. -- RMS. */
4393 else if (xerrno
== EFAULT
)
4396 else if (xerrno
== EBADF
)
4399 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4400 the child's closure of the pts gives the parent a SIGHUP, and
4401 the ptc file descriptor is automatically closed,
4402 yielding EBADF here or at select() call above.
4403 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4404 in m/ibmrt-aix.h), and here we just ignore the select error.
4405 Cleanup occurs c/o status_notify after SIGCLD. */
4406 no_avail
= 1; /* Cannot depend on values returned */
4412 error ("select error: %s", emacs_strerror (xerrno
));
4417 FD_ZERO (&Available
);
4418 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4421 #if defined(sun) && !defined(USG5_4)
4422 if (nfds
> 0 && keyboard_bit_set (&Available
)
4424 /* System sometimes fails to deliver SIGIO.
4426 David J. Mackenzie says that Emacs doesn't compile under
4427 Solaris if this code is enabled, thus the USG5_4 in the CPP
4428 conditional. "I haven't noticed any ill effects so far.
4429 If you find a Solaris expert somewhere, they might know
4431 kill (getpid (), SIGIO
);
4434 #if 0 /* When polling is used, interrupt_input is 0,
4435 so get_input_pending should read the input.
4436 So this should not be needed. */
4437 /* If we are using polling for input,
4438 and we see input available, make it get read now.
4439 Otherwise it might not actually get read for a second.
4440 And on hpux, since we turn off polling in wait_reading_process_output,
4441 it might never get read at all if we don't spend much time
4442 outside of wait_reading_process_output. */
4443 if (read_kbd
&& interrupt_input
4444 && keyboard_bit_set (&Available
)
4445 && input_polling_used ())
4446 kill (getpid (), SIGALRM
);
4449 /* Check for keyboard input */
4450 /* If there is any, return immediately
4451 to give it higher priority than subprocesses */
4455 int old_timers_run
= timers_run
;
4456 struct buffer
*old_buffer
= current_buffer
;
4459 if (detect_input_pending_run_timers (do_display
))
4461 swallow_events (do_display
);
4462 if (detect_input_pending_run_timers (do_display
))
4466 /* If a timer has run, this might have changed buffers
4467 an alike. Make read_key_sequence aware of that. */
4468 if (timers_run
!= old_timers_run
4469 && waiting_for_user_input_p
== -1
4470 && old_buffer
!= current_buffer
)
4471 record_asynch_buffer_change ();
4477 /* If there is unread keyboard input, also return. */
4479 && requeued_events_pending_p ())
4482 /* If we are not checking for keyboard input now,
4483 do process events (but don't run any timers).
4484 This is so that X events will be processed.
4485 Otherwise they may have to wait until polling takes place.
4486 That would causes delays in pasting selections, for example.
4488 (We used to do this only if wait_for_cell.) */
4489 if (read_kbd
== 0 && detect_input_pending ())
4491 swallow_events (do_display
);
4492 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4493 if (detect_input_pending ())
4498 /* Exit now if the cell we're waiting for became non-nil. */
4499 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4503 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4504 go read it. This can happen with X on BSD after logging out.
4505 In that case, there really is no input and no SIGIO,
4506 but select says there is input. */
4508 if (read_kbd
&& interrupt_input
4509 && keyboard_bit_set (&Available
) && ! noninteractive
)
4510 kill (getpid (), SIGIO
);
4514 got_some_input
|= nfds
> 0;
4516 /* If checking input just got us a size-change event from X,
4517 obey it now if we should. */
4518 if (read_kbd
|| ! NILP (wait_for_cell
))
4519 do_pending_window_change (0);
4521 /* Check for data from a process. */
4522 if (no_avail
|| nfds
== 0)
4525 /* Really FIRST_PROC_DESC should be 0 on Unix,
4526 but this is safer in the short run. */
4527 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4529 if (FD_ISSET (channel
, &Available
)
4530 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
4534 /* If waiting for this channel, arrange to return as
4535 soon as no more input to be processed. No more
4537 if (wait_channel
== channel
)
4543 proc
= chan_process
[channel
];
4547 /* If this is a server stream socket, accept connection. */
4548 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4550 server_accept_connection (proc
, channel
);
4554 /* Read data from the process, starting with our
4555 buffered-ahead character if we have one. */
4557 nread
= read_process_output (proc
, channel
);
4560 /* Since read_process_output can run a filter,
4561 which can call accept-process-output,
4562 don't try to read from any other processes
4563 before doing the select again. */
4564 FD_ZERO (&Available
);
4567 redisplay_preserve_echo_area (12);
4570 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4573 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4574 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4576 else if (nread
== -1 && errno
== EAGAIN
)
4580 else if (nread
== -1 && errno
== EAGAIN
)
4582 /* Note that we cannot distinguish between no input
4583 available now and a closed pipe.
4584 With luck, a closed pipe will be accompanied by
4585 subprocess termination and SIGCHLD. */
4586 else if (nread
== 0 && !NETCONN_P (proc
))
4588 #endif /* O_NDELAY */
4589 #endif /* O_NONBLOCK */
4591 /* On some OSs with ptys, when the process on one end of
4592 a pty exits, the other end gets an error reading with
4593 errno = EIO instead of getting an EOF (0 bytes read).
4594 Therefore, if we get an error reading and errno =
4595 EIO, just continue, because the child process has
4596 exited and should clean itself up soon (e.g. when we
4599 However, it has been known to happen that the SIGCHLD
4600 got lost. So raise the signl again just in case.
4602 else if (nread
== -1 && errno
== EIO
)
4603 kill (getpid (), SIGCHLD
);
4604 #endif /* HAVE_PTYS */
4605 /* If we can detect process termination, don't consider the process
4606 gone just because its pipe is closed. */
4608 else if (nread
== 0 && !NETCONN_P (proc
))
4613 /* Preserve status of processes already terminated. */
4614 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
4615 deactivate_process (proc
);
4616 if (!NILP (XPROCESS (proc
)->raw_status_low
))
4617 update_status (XPROCESS (proc
));
4618 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4619 XPROCESS (proc
)->status
4620 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
4623 #ifdef NON_BLOCKING_CONNECT
4624 if (check_connect
&& FD_ISSET (channel
, &Connecting
)
4625 && FD_ISSET (channel
, &connect_wait_mask
))
4627 struct Lisp_Process
*p
;
4629 FD_CLR (channel
, &connect_wait_mask
);
4630 if (--num_pending_connects
< 0)
4633 proc
= chan_process
[channel
];
4637 p
= XPROCESS (proc
);
4640 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4641 So only use it on systems where it is known to work. */
4643 int xlen
= sizeof(xerrno
);
4644 if (getsockopt(channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4649 struct sockaddr pname
;
4650 int pnamelen
= sizeof(pname
);
4652 /* If connection failed, getpeername will fail. */
4654 if (getpeername(channel
, &pname
, &pnamelen
) < 0)
4656 /* Obtain connect failure code through error slippage. */
4659 if (errno
== ENOTCONN
&& read(channel
, &dummy
, 1) < 0)
4666 XSETINT (p
->tick
, ++process_tick
);
4667 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
4668 deactivate_process (proc
);
4673 /* Execute the sentinel here. If we had relied on
4674 status_notify to do it later, it will read input
4675 from the process before calling the sentinel. */
4676 exec_sentinel (proc
, build_string ("open\n"));
4677 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4679 FD_SET (XINT (p
->infd
), &input_wait_mask
);
4680 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
4684 #endif /* NON_BLOCKING_CONNECT */
4685 } /* end for each file descriptor */
4686 } /* end while exit conditions not met */
4688 waiting_for_user_input_p
= saved_waiting_for_user_input_p
;
4690 /* If calling from keyboard input, do not quit
4691 since we want to return C-g as an input character.
4692 Otherwise, do pending quit if requested. */
4695 /* Prevent input_pending from remaining set if we quit. */
4696 clear_input_pending ();
4699 #ifdef POLL_INTERRUPTED_SYS_CALL
4700 /* AlainF 5-Jul-1996
4701 HP-UX 10.10 seems to have problems with signals coming in
4702 Causes "poll: interrupted system call" messages when Emacs is run
4704 Turn periodic alarms back on */
4706 #endif /* POLL_INTERRUPTED_SYS_CALL */
4708 return got_some_input
;
4711 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
4714 read_process_output_call (fun_and_args
)
4715 Lisp_Object fun_and_args
;
4717 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
4721 read_process_output_error_handler (error
)
4724 cmd_error_internal (error
, "error in process filter: ");
4726 update_echo_area ();
4727 Fsleep_for (make_number (2), Qnil
);
4731 /* Read pending output from the process channel,
4732 starting with our buffered-ahead character if we have one.
4733 Yield number of decoded characters read.
4735 This function reads at most 4096 characters.
4736 If you want to read all available subprocess output,
4737 you must call it repeatedly until it returns zero.
4739 The characters read are decoded according to PROC's coding-system
4743 read_process_output (proc
, channel
)
4745 register int channel
;
4747 register int nbytes
;
4749 register Lisp_Object outstream
;
4750 register struct buffer
*old
= current_buffer
;
4751 register struct Lisp_Process
*p
= XPROCESS (proc
);
4752 register int opoint
;
4753 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
4754 int carryover
= XINT (p
->decoding_carryover
);
4758 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
4760 vs
= get_vms_process_pointer (p
->pid
);
4764 return (0); /* Really weird if it does this */
4765 if (!(vs
->iosb
[0] & 1))
4766 return -1; /* I/O error */
4769 error ("Could not get VMS process pointer");
4770 chars
= vs
->inputBuffer
;
4771 nbytes
= clean_vms_buffer (chars
, vs
->iosb
[1]);
4774 start_vms_process_read (vs
); /* Crank up the next read on the process */
4775 return 1; /* Nothing worth printing, say we got 1 */
4779 /* The data carried over in the previous decoding (which are at
4780 the tail of decoding buffer) should be prepended to the new
4781 data read to decode all together. */
4782 chars
= (char *) alloca (nbytes
+ carryover
);
4783 bcopy (SDATA (p
->decoding_buf
), buf
, carryover
);
4784 bcopy (vs
->inputBuffer
, chars
+ carryover
, nbytes
);
4788 chars
= (char *) alloca (carryover
+ readmax
);
4790 /* See the comment above. */
4791 bcopy (SDATA (p
->decoding_buf
), chars
, carryover
);
4793 #ifdef DATAGRAM_SOCKETS
4794 /* We have a working select, so proc_buffered_char is always -1. */
4795 if (DATAGRAM_CHAN_P (channel
))
4797 int len
= datagram_address
[channel
].len
;
4798 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
4799 0, datagram_address
[channel
].sa
, &len
);
4803 if (proc_buffered_char
[channel
] < 0)
4805 nbytes
= emacs_read (channel
, chars
+ carryover
, readmax
);
4806 #ifdef ADAPTIVE_READ_BUFFERING
4807 if (nbytes
> 0 && !NILP (p
->adaptive_read_buffering
))
4809 int delay
= XINT (p
->read_output_delay
);
4812 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
4815 process_output_delay_count
++;
4816 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
4819 else if (delay
> 0 && (nbytes
== readmax
))
4821 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
4823 process_output_delay_count
--;
4825 XSETINT (p
->read_output_delay
, delay
);
4828 p
->read_output_skip
= Qt
;
4829 process_output_skip
= 1;
4836 chars
[carryover
] = proc_buffered_char
[channel
];
4837 proc_buffered_char
[channel
] = -1;
4838 nbytes
= emacs_read (channel
, chars
+ carryover
+ 1, readmax
- 1);
4842 nbytes
= nbytes
+ 1;
4844 #endif /* not VMS */
4846 XSETINT (p
->decoding_carryover
, 0);
4848 /* At this point, NBYTES holds number of bytes just received
4849 (including the one in proc_buffered_char[channel]). */
4852 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
4854 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
4857 /* Now set NBYTES how many bytes we must decode. */
4858 nbytes
+= carryover
;
4860 /* Read and dispose of the process output. */
4861 outstream
= p
->filter
;
4862 if (!NILP (outstream
))
4864 /* We inhibit quit here instead of just catching it so that
4865 hitting ^G when a filter happens to be running won't screw
4867 int count
= SPECPDL_INDEX ();
4868 Lisp_Object odeactivate
;
4869 Lisp_Object obuffer
, okeymap
;
4871 int outer_running_asynch_code
= running_asynch_code
;
4872 int waiting
= waiting_for_user_input_p
;
4874 /* No need to gcpro these, because all we do with them later
4875 is test them for EQness, and none of them should be a string. */
4876 odeactivate
= Vdeactivate_mark
;
4877 XSETBUFFER (obuffer
, current_buffer
);
4878 okeymap
= current_buffer
->keymap
;
4880 specbind (Qinhibit_quit
, Qt
);
4881 specbind (Qlast_nonmenu_event
, Qt
);
4883 /* In case we get recursively called,
4884 and we already saved the match data nonrecursively,
4885 save the same match data in safely recursive fashion. */
4886 if (outer_running_asynch_code
)
4889 /* Don't clobber the CURRENT match data, either! */
4890 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
4891 restore_search_regs ();
4892 record_unwind_save_match_data ();
4893 Fset_match_data (tem
, Qt
);
4896 /* For speed, if a search happens within this code,
4897 save the match data in a special nonrecursive fashion. */
4898 running_asynch_code
= 1;
4900 text
= decode_coding_string (make_unibyte_string (chars
, nbytes
),
4902 Vlast_coding_system_used
= coding
->symbol
;
4903 /* A new coding system might be found. */
4904 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
4906 p
->decode_coding_system
= coding
->symbol
;
4908 /* Don't call setup_coding_system for
4909 proc_decode_coding_system[channel] here. It is done in
4910 detect_coding called via decode_coding above. */
4912 /* If a coding system for encoding is not yet decided, we set
4913 it as the same as coding-system for decoding.
4915 But, before doing that we must check if
4916 proc_encode_coding_system[p->outfd] surely points to a
4917 valid memory because p->outfd will be changed once EOF is
4918 sent to the process. */
4919 if (NILP (p
->encode_coding_system
)
4920 && proc_encode_coding_system
[XINT (p
->outfd
)])
4922 p
->encode_coding_system
= coding
->symbol
;
4923 setup_coding_system (coding
->symbol
,
4924 proc_encode_coding_system
[XINT (p
->outfd
)]);
4928 carryover
= nbytes
- coding
->consumed
;
4929 if (SCHARS (p
->decoding_buf
) < carryover
)
4930 p
->decoding_buf
= make_uninit_string (carryover
);
4931 bcopy (chars
+ coding
->consumed
, SDATA (p
->decoding_buf
),
4933 XSETINT (p
->decoding_carryover
, carryover
);
4934 /* Adjust the multibyteness of TEXT to that of the filter. */
4935 if (NILP (p
->filter_multibyte
) != ! STRING_MULTIBYTE (text
))
4936 text
= (STRING_MULTIBYTE (text
)
4937 ? Fstring_as_unibyte (text
)
4938 : Fstring_to_multibyte (text
));
4939 if (SBYTES (text
) > 0)
4940 internal_condition_case_1 (read_process_output_call
,
4942 Fcons (proc
, Fcons (text
, Qnil
))),
4943 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
4944 read_process_output_error_handler
);
4946 /* If we saved the match data nonrecursively, restore it now. */
4947 restore_search_regs ();
4948 running_asynch_code
= outer_running_asynch_code
;
4950 /* Handling the process output should not deactivate the mark. */
4951 Vdeactivate_mark
= odeactivate
;
4953 /* Restore waiting_for_user_input_p as it was
4954 when we were called, in case the filter clobbered it. */
4955 waiting_for_user_input_p
= waiting
;
4957 #if 0 /* Call record_asynch_buffer_change unconditionally,
4958 because we might have changed minor modes or other things
4959 that affect key bindings. */
4960 if (! EQ (Fcurrent_buffer (), obuffer
)
4961 || ! EQ (current_buffer
->keymap
, okeymap
))
4963 /* But do it only if the caller is actually going to read events.
4964 Otherwise there's no need to make him wake up, and it could
4965 cause trouble (for example it would make Fsit_for return). */
4966 if (waiting_for_user_input_p
== -1)
4967 record_asynch_buffer_change ();
4970 start_vms_process_read (vs
);
4972 unbind_to (count
, Qnil
);
4976 /* If no filter, write into buffer if it isn't dead. */
4977 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
4979 Lisp_Object old_read_only
;
4980 int old_begv
, old_zv
;
4981 int old_begv_byte
, old_zv_byte
;
4982 Lisp_Object odeactivate
;
4983 int before
, before_byte
;
4988 odeactivate
= Vdeactivate_mark
;
4990 Fset_buffer (p
->buffer
);
4992 opoint_byte
= PT_BYTE
;
4993 old_read_only
= current_buffer
->read_only
;
4996 old_begv_byte
= BEGV_BYTE
;
4997 old_zv_byte
= ZV_BYTE
;
4999 current_buffer
->read_only
= Qnil
;
5001 /* Insert new output into buffer
5002 at the current end-of-output marker,
5003 thus preserving logical ordering of input and output. */
5004 if (XMARKER (p
->mark
)->buffer
)
5005 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
5006 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
5009 SET_PT_BOTH (ZV
, ZV_BYTE
);
5011 before_byte
= PT_BYTE
;
5013 /* If the output marker is outside of the visible region, save
5014 the restriction and widen. */
5015 if (! (BEGV
<= PT
&& PT
<= ZV
))
5018 text
= decode_coding_string (make_unibyte_string (chars
, nbytes
),
5020 Vlast_coding_system_used
= coding
->symbol
;
5021 /* A new coding system might be found. See the comment in the
5022 similar code in the previous `if' block. */
5023 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
5025 p
->decode_coding_system
= coding
->symbol
;
5026 if (NILP (p
->encode_coding_system
)
5027 && proc_encode_coding_system
[XINT (p
->outfd
)])
5029 p
->encode_coding_system
= coding
->symbol
;
5030 setup_coding_system (coding
->symbol
,
5031 proc_encode_coding_system
[XINT (p
->outfd
)]);
5034 carryover
= nbytes
- coding
->consumed
;
5035 if (SCHARS (p
->decoding_buf
) < carryover
)
5036 p
->decoding_buf
= make_uninit_string (carryover
);
5037 bcopy (chars
+ coding
->consumed
, SDATA (p
->decoding_buf
),
5039 XSETINT (p
->decoding_carryover
, carryover
);
5040 /* Adjust the multibyteness of TEXT to that of the buffer. */
5041 if (NILP (current_buffer
->enable_multibyte_characters
)
5042 != ! STRING_MULTIBYTE (text
))
5043 text
= (STRING_MULTIBYTE (text
)
5044 ? Fstring_as_unibyte (text
)
5045 : Fstring_to_multibyte (text
));
5046 /* Insert before markers in case we are inserting where
5047 the buffer's mark is, and the user's next command is Meta-y. */
5048 insert_from_string_before_markers (text
, 0, 0,
5049 SCHARS (text
), SBYTES (text
), 0);
5051 /* Make sure the process marker's position is valid when the
5052 process buffer is changed in the signal_after_change above.
5053 W3 is known to do that. */
5054 if (BUFFERP (p
->buffer
)
5055 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5056 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5058 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5060 update_mode_lines
++;
5062 /* Make sure opoint and the old restrictions
5063 float ahead of any new text just as point would. */
5064 if (opoint
>= before
)
5066 opoint
+= PT
- before
;
5067 opoint_byte
+= PT_BYTE
- before_byte
;
5069 if (old_begv
> before
)
5071 old_begv
+= PT
- before
;
5072 old_begv_byte
+= PT_BYTE
- before_byte
;
5074 if (old_zv
>= before
)
5076 old_zv
+= PT
- before
;
5077 old_zv_byte
+= PT_BYTE
- before_byte
;
5080 /* If the restriction isn't what it should be, set it. */
5081 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5082 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5084 /* Handling the process output should not deactivate the mark. */
5085 Vdeactivate_mark
= odeactivate
;
5087 current_buffer
->read_only
= old_read_only
;
5088 SET_PT_BOTH (opoint
, opoint_byte
);
5089 set_buffer_internal (old
);
5092 start_vms_process_read (vs
);
5097 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
5099 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
5100 This is intended for use by asynchronous process output filters and sentinels. */)
5103 return (waiting_for_user_input_p
? Qt
: Qnil
);
5106 /* Sending data to subprocess */
5108 jmp_buf send_process_frame
;
5109 Lisp_Object process_sent_to
;
5112 send_process_trap ()
5114 SIGNAL_THREAD_CHECK (SIGPIPE
);
5119 sigunblock (sigmask (SIGPIPE
));
5120 longjmp (send_process_frame
, 1);
5123 /* Send some data to process PROC.
5124 BUF is the beginning of the data; LEN is the number of characters.
5125 OBJECT is the Lisp object that the data comes from. If OBJECT is
5126 nil or t, it means that the data comes from C string.
5128 If OBJECT is not nil, the data is encoded by PROC's coding-system
5129 for encoding before it is sent.
5131 This function can evaluate Lisp code and can garbage collect. */
5134 send_process (proc
, buf
, len
, object
)
5135 volatile Lisp_Object proc
;
5136 unsigned char *volatile buf
;
5138 volatile Lisp_Object object
;
5140 /* Use volatile to protect variables from being clobbered by longjmp. */
5141 struct Lisp_Process
*p
= XPROCESS (proc
);
5143 struct coding_system
*coding
;
5144 struct gcpro gcpro1
;
5145 SIGTYPE (*volatile old_sigpipe
) ();
5150 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
5153 if (! NILP (p
->raw_status_low
))
5155 if (! EQ (p
->status
, Qrun
))
5156 error ("Process %s not running", SDATA (p
->name
));
5157 if (XINT (p
->outfd
) < 0)
5158 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5160 coding
= proc_encode_coding_system
[XINT (p
->outfd
)];
5161 Vlast_coding_system_used
= coding
->symbol
;
5163 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5164 || (BUFFERP (object
)
5165 && !NILP (XBUFFER (object
)->enable_multibyte_characters
))
5168 if (!EQ (coding
->symbol
, p
->encode_coding_system
))
5169 /* The coding system for encoding was changed to raw-text
5170 because we sent a unibyte text previously. Now we are
5171 sending a multibyte text, thus we must encode it by the
5172 original coding system specified for the current process. */
5173 setup_coding_system (p
->encode_coding_system
, coding
);
5174 /* src_multibyte should be set to 1 _after_ a call to
5175 setup_coding_system, since it resets src_multibyte to
5177 coding
->src_multibyte
= 1;
5181 /* For sending a unibyte text, character code conversion should
5182 not take place but EOL conversion should. So, setup raw-text
5183 or one of the subsidiary if we have not yet done it. */
5184 if (coding
->type
!= coding_type_raw_text
)
5186 if (CODING_REQUIRE_FLUSHING (coding
))
5188 /* But, before changing the coding, we must flush out data. */
5189 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5190 send_process (proc
, "", 0, Qt
);
5192 coding
->src_multibyte
= 0;
5193 setup_raw_text_coding_system (coding
);
5196 coding
->dst_multibyte
= 0;
5198 if (CODING_REQUIRE_ENCODING (coding
))
5200 int require
= encoding_buffer_size (coding
, len
);
5201 int from_byte
= -1, from
= -1, to
= -1;
5203 if (BUFFERP (object
))
5205 from_byte
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
5206 from
= buf_bytepos_to_charpos (XBUFFER (object
), from_byte
);
5207 to
= buf_bytepos_to_charpos (XBUFFER (object
), from_byte
+ len
);
5209 else if (STRINGP (object
))
5211 from_byte
= buf
- SDATA (object
);
5212 from
= string_byte_to_char (object
, from_byte
);
5213 to
= string_byte_to_char (object
, from_byte
+ len
);
5216 if (coding
->composing
!= COMPOSITION_DISABLED
)
5219 coding_save_composition (coding
, from
, to
, object
);
5221 coding
->composing
= COMPOSITION_DISABLED
;
5224 if (SBYTES (p
->encoding_buf
) < require
)
5225 p
->encoding_buf
= make_uninit_string (require
);
5228 buf
= (BUFFERP (object
)
5229 ? BUF_BYTE_ADDRESS (XBUFFER (object
), from_byte
)
5230 : SDATA (object
) + from_byte
);
5232 object
= p
->encoding_buf
;
5233 encode_coding (coding
, (char *) buf
, SDATA (object
),
5234 len
, SBYTES (object
));
5235 coding_free_composition_data (coding
);
5236 len
= coding
->produced
;
5237 buf
= SDATA (object
);
5241 vs
= get_vms_process_pointer (p
->pid
);
5243 error ("Could not find this process: %x", p
->pid
);
5244 else if (write_to_vms_process (vs
, buf
, len
))
5248 if (pty_max_bytes
== 0)
5250 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5251 pty_max_bytes
= fpathconf (XFASTINT (p
->outfd
), _PC_MAX_CANON
);
5252 if (pty_max_bytes
< 0)
5253 pty_max_bytes
= 250;
5255 pty_max_bytes
= 250;
5257 /* Deduct one, to leave space for the eof. */
5261 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
5262 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
5263 when returning with longjmp despite being declared volatile. */
5264 if (!setjmp (send_process_frame
))
5266 process_sent_to
= proc
;
5271 /* Decide how much data we can send in one batch.
5272 Long lines need to be split into multiple batches. */
5273 if (!NILP (p
->pty_flag
))
5275 /* Starting this at zero is always correct when not the first
5276 iteration because the previous iteration ended by sending C-d.
5277 It may not be correct for the first iteration
5278 if a partial line was sent in a separate send_process call.
5279 If that proves worth handling, we need to save linepos
5280 in the process object. */
5282 unsigned char *ptr
= (unsigned char *) buf
;
5283 unsigned char *end
= (unsigned char *) buf
+ len
;
5285 /* Scan through this text for a line that is too long. */
5286 while (ptr
!= end
&& linepos
< pty_max_bytes
)
5294 /* If we found one, break the line there
5295 and put in a C-d to force the buffer through. */
5299 /* Send this batch, using one or more write calls. */
5302 int outfd
= XINT (p
->outfd
);
5303 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
5304 #ifdef DATAGRAM_SOCKETS
5305 if (DATAGRAM_CHAN_P (outfd
))
5307 rv
= sendto (outfd
, (char *) buf
, this,
5308 0, datagram_address
[outfd
].sa
,
5309 datagram_address
[outfd
].len
);
5310 if (rv
< 0 && errno
== EMSGSIZE
)
5312 signal (SIGPIPE
, old_sigpipe
);
5313 report_file_error ("sending datagram",
5314 Fcons (proc
, Qnil
));
5320 rv
= emacs_write (outfd
, (char *) buf
, this);
5321 #ifdef ADAPTIVE_READ_BUFFERING
5322 if (XINT (p
->read_output_delay
) > 0
5323 && EQ (p
->adaptive_read_buffering
, Qt
))
5325 XSETFASTINT (p
->read_output_delay
, 0);
5326 process_output_delay_count
--;
5327 p
->read_output_skip
= Qnil
;
5331 signal (SIGPIPE
, old_sigpipe
);
5337 || errno
== EWOULDBLOCK
5343 /* Buffer is full. Wait, accepting input;
5344 that may allow the program
5345 to finish doing output and read more. */
5349 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5350 /* A gross hack to work around a bug in FreeBSD.
5351 In the following sequence, read(2) returns
5355 write(2) 954 bytes, get EAGAIN
5356 read(2) 1024 bytes in process_read_output
5357 read(2) 11 bytes in process_read_output
5359 That is, read(2) returns more bytes than have
5360 ever been written successfully. The 1033 bytes
5361 read are the 1022 bytes written successfully
5362 after processing (for example with CRs added if
5363 the terminal is set up that way which it is
5364 here). The same bytes will be seen again in a
5365 later read(2), without the CRs. */
5367 if (errno
== EAGAIN
)
5370 ioctl (XINT (p
->outfd
), TIOCFLUSH
, &flags
);
5372 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5374 /* Running filters might relocate buffers or strings.
5375 Arrange to relocate BUF. */
5376 if (BUFFERP (object
))
5377 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
5378 else if (STRINGP (object
))
5379 offset
= buf
- SDATA (object
);
5381 #ifdef EMACS_HAS_USECS
5382 wait_reading_process_output (0, 20000, 0, 0, Qnil
, NULL
, 0);
5384 wait_reading_process_output (1, 0, 0, 0, Qnil
, NULL
, 0);
5387 if (BUFFERP (object
))
5388 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
5389 else if (STRINGP (object
))
5390 buf
= offset
+ SDATA (object
);
5395 /* This is a real error. */
5396 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5403 /* If we sent just part of the string, put in an EOF
5404 to force it through, before we send the rest. */
5406 Fprocess_send_eof (proc
);
5409 #endif /* not VMS */
5412 signal (SIGPIPE
, old_sigpipe
);
5414 proc
= process_sent_to
;
5415 p
= XPROCESS (proc
);
5417 p
->raw_status_low
= Qnil
;
5418 p
->raw_status_high
= Qnil
;
5419 p
->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5420 XSETINT (p
->tick
, ++process_tick
);
5421 deactivate_process (proc
);
5423 error ("Error writing to process %s; closed it", SDATA (p
->name
));
5425 error ("SIGPIPE raised on process %s; closed it", SDATA (p
->name
));
5432 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5434 doc
: /* Send current contents of region as input to PROCESS.
5435 PROCESS may be a process, a buffer, the name of a process or buffer, or
5436 nil, indicating the current buffer's process.
5437 Called from program, takes three arguments, PROCESS, START and END.
5438 If the region is more than 500 characters long,
5439 it is sent in several bunches. This may happen even for shorter regions.
5440 Output from processes can arrive in between bunches. */)
5441 (process
, start
, end
)
5442 Lisp_Object process
, start
, end
;
5447 proc
= get_process (process
);
5448 validate_region (&start
, &end
);
5450 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5451 move_gap (XINT (start
));
5453 start1
= CHAR_TO_BYTE (XINT (start
));
5454 end1
= CHAR_TO_BYTE (XINT (end
));
5455 send_process (proc
, BYTE_POS_ADDR (start1
), end1
- start1
,
5456 Fcurrent_buffer ());
5461 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5463 doc
: /* Send PROCESS the contents of STRING as input.
5464 PROCESS may be a process, a buffer, the name of a process or buffer, or
5465 nil, indicating the current buffer's process.
5466 If STRING is more than 500 characters long,
5467 it is sent in several bunches. This may happen even for shorter strings.
5468 Output from processes can arrive in between bunches. */)
5470 Lisp_Object process
, string
;
5473 CHECK_STRING (string
);
5474 proc
= get_process (process
);
5475 send_process (proc
, SDATA (string
),
5476 SBYTES (string
), string
);
5480 /* Return the foreground process group for the tty/pty that
5481 the process P uses. */
5483 emacs_get_tty_pgrp (p
)
5484 struct Lisp_Process
*p
;
5489 if (ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5492 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5493 master side. Try the slave side. */
5494 fd
= emacs_open (XSTRING (p
->tty_name
)->data
, O_RDONLY
, 0);
5498 ioctl (fd
, TIOCGPGRP
, &gid
);
5502 #endif /* defined (TIOCGPGRP ) */
5507 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5508 Sprocess_running_child_p
, 0, 1, 0,
5509 doc
: /* Return t if PROCESS has given the terminal to a child.
5510 If the operating system does not make it possible to find out,
5511 return t unconditionally. */)
5513 Lisp_Object process
;
5515 /* Initialize in case ioctl doesn't exist or gives an error,
5516 in a way that will cause returning t. */
5519 struct Lisp_Process
*p
;
5521 proc
= get_process (process
);
5522 p
= XPROCESS (proc
);
5524 if (!EQ (p
->childp
, Qt
))
5525 error ("Process %s is not a subprocess",
5527 if (XINT (p
->infd
) < 0)
5528 error ("Process %s is not active",
5531 gid
= emacs_get_tty_pgrp (p
);
5533 if (gid
== XFASTINT (p
->pid
))
5538 /* send a signal number SIGNO to PROCESS.
5539 If CURRENT_GROUP is t, that means send to the process group
5540 that currently owns the terminal being used to communicate with PROCESS.
5541 This is used for various commands in shell mode.
5542 If CURRENT_GROUP is lambda, that means send to the process group
5543 that currently owns the terminal, but only if it is NOT the shell itself.
5545 If NOMSG is zero, insert signal-announcements into process's buffers
5548 If we can, we try to signal PROCESS by sending control characters
5549 down the pty. This allows us to signal inferiors who have changed
5550 their uid, for which killpg would return an EPERM error. */
5553 process_send_signal (process
, signo
, current_group
, nomsg
)
5554 Lisp_Object process
;
5556 Lisp_Object current_group
;
5560 register struct Lisp_Process
*p
;
5564 proc
= get_process (process
);
5565 p
= XPROCESS (proc
);
5567 if (!EQ (p
->childp
, Qt
))
5568 error ("Process %s is not a subprocess",
5570 if (XINT (p
->infd
) < 0)
5571 error ("Process %s is not active",
5574 if (NILP (p
->pty_flag
))
5575 current_group
= Qnil
;
5577 /* If we are using pgrps, get a pgrp number and make it negative. */
5578 if (NILP (current_group
))
5579 /* Send the signal to the shell's process group. */
5580 gid
= XFASTINT (p
->pid
);
5583 #ifdef SIGNALS_VIA_CHARACTERS
5584 /* If possible, send signals to the entire pgrp
5585 by sending an input character to it. */
5587 /* TERMIOS is the latest and bestest, and seems most likely to
5588 work. If the system has it, use it. */
5591 cc_t
*sig_char
= NULL
;
5593 tcgetattr (XINT (p
->infd
), &t
);
5598 sig_char
= &t
.c_cc
[VINTR
];
5602 sig_char
= &t
.c_cc
[VQUIT
];
5606 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5607 sig_char
= &t
.c_cc
[VSWTCH
];
5609 sig_char
= &t
.c_cc
[VSUSP
];
5614 if (sig_char
&& *sig_char
!= CDISABLE
)
5616 send_process (proc
, sig_char
, 1, Qnil
);
5619 /* If we can't send the signal with a character,
5620 fall through and send it another way. */
5621 #else /* ! HAVE_TERMIOS */
5623 /* On Berkeley descendants, the following IOCTL's retrieve the
5624 current control characters. */
5625 #if defined (TIOCGLTC) && defined (TIOCGETC)
5633 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
5634 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
5637 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
5638 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
5642 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
5643 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
5645 #endif /* ! defined (SIGTSTP) */
5648 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
5650 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
5657 ioctl (XINT (p
->infd
), TCGETA
, &t
);
5658 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
5661 ioctl (XINT (p
->infd
), TCGETA
, &t
);
5662 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
5666 ioctl (XINT (p
->infd
), TCGETA
, &t
);
5667 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
5669 #endif /* ! defined (SIGTSTP) */
5671 #else /* ! defined (TCGETA) */
5672 Your configuration files are messed up
.
5673 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
5674 you'd better be using one of the alternatives above! */
5675 #endif /* ! defined (TCGETA) */
5676 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
5677 /* In this case, the code above should alway returns. */
5679 #endif /* ! defined HAVE_TERMIOS */
5681 /* The code above may fall through if it can't
5682 handle the signal. */
5683 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5686 /* Get the current pgrp using the tty itself, if we have that.
5687 Otherwise, use the pty to get the pgrp.
5688 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5689 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5690 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5691 His patch indicates that if TIOCGPGRP returns an error, then
5692 we should just assume that p->pid is also the process group id. */
5694 gid
= emacs_get_tty_pgrp (p
);
5697 /* If we can't get the information, assume
5698 the shell owns the tty. */
5699 gid
= XFASTINT (p
->pid
);
5701 /* It is not clear whether anything really can set GID to -1.
5702 Perhaps on some system one of those ioctls can or could do so.
5703 Or perhaps this is vestigial. */
5706 #else /* ! defined (TIOCGPGRP ) */
5707 /* Can't select pgrps on this system, so we know that
5708 the child itself heads the pgrp. */
5709 gid
= XFASTINT (p
->pid
);
5710 #endif /* ! defined (TIOCGPGRP ) */
5712 /* If current_group is lambda, and the shell owns the terminal,
5713 don't send any signal. */
5714 if (EQ (current_group
, Qlambda
) && gid
== XFASTINT (p
->pid
))
5722 p
->raw_status_low
= Qnil
;
5723 p
->raw_status_high
= Qnil
;
5725 XSETINT (p
->tick
, ++process_tick
);
5729 #endif /* ! defined (SIGCONT) */
5732 send_process (proc
, "\003", 1, Qnil
); /* ^C */
5737 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
5742 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
5745 flush_pending_output (XINT (p
->infd
));
5749 /* If we don't have process groups, send the signal to the immediate
5750 subprocess. That isn't really right, but it's better than any
5751 obvious alternative. */
5754 kill (XFASTINT (p
->pid
), signo
);
5758 /* gid may be a pid, or minus a pgrp's number */
5760 if (!NILP (current_group
))
5762 if (ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
) == -1)
5763 EMACS_KILLPG (gid
, signo
);
5767 gid
= - XFASTINT (p
->pid
);
5770 #else /* ! defined (TIOCSIGSEND) */
5771 EMACS_KILLPG (gid
, signo
);
5772 #endif /* ! defined (TIOCSIGSEND) */
5775 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
5776 doc
: /* Interrupt process PROCESS.
5777 PROCESS may be a process, a buffer, or the name of a process or buffer.
5778 No arg or nil means current buffer's process.
5779 Second arg CURRENT-GROUP non-nil means send signal to
5780 the current process-group of the process's controlling terminal
5781 rather than to the process's own process group.
5782 If the process is a shell, this means interrupt current subjob
5783 rather than the shell.
5785 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
5786 don't send the signal. */)
5787 (process
, current_group
)
5788 Lisp_Object process
, current_group
;
5790 process_send_signal (process
, SIGINT
, current_group
, 0);
5794 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
5795 doc
: /* Kill process PROCESS. May be process or name of one.
5796 See function `interrupt-process' for more details on usage. */)
5797 (process
, current_group
)
5798 Lisp_Object process
, current_group
;
5800 process_send_signal (process
, SIGKILL
, current_group
, 0);
5804 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
5805 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
5806 See function `interrupt-process' for more details on usage. */)
5807 (process
, current_group
)
5808 Lisp_Object process
, current_group
;
5810 process_send_signal (process
, SIGQUIT
, current_group
, 0);
5814 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
5815 doc
: /* Stop process PROCESS. May be process or name of one.
5816 See function `interrupt-process' for more details on usage.
5817 If PROCESS is a network process, inhibit handling of incoming traffic. */)
5818 (process
, current_group
)
5819 Lisp_Object process
, current_group
;
5822 if (PROCESSP (process
) && NETCONN_P (process
))
5824 struct Lisp_Process
*p
;
5826 p
= XPROCESS (process
);
5827 if (NILP (p
->command
)
5828 && XINT (p
->infd
) >= 0)
5830 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
5831 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
5838 error ("no SIGTSTP support");
5840 process_send_signal (process
, SIGTSTP
, current_group
, 0);
5845 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
5846 doc
: /* Continue process PROCESS. May be process or name of one.
5847 See function `interrupt-process' for more details on usage.
5848 If PROCESS is a network process, resume handling of incoming traffic. */)
5849 (process
, current_group
)
5850 Lisp_Object process
, current_group
;
5853 if (PROCESSP (process
) && NETCONN_P (process
))
5855 struct Lisp_Process
*p
;
5857 p
= XPROCESS (process
);
5858 if (EQ (p
->command
, Qt
)
5859 && XINT (p
->infd
) >= 0
5860 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
5862 FD_SET (XINT (p
->infd
), &input_wait_mask
);
5863 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
5870 process_send_signal (process
, SIGCONT
, current_group
, 0);
5872 error ("no SIGCONT support");
5877 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
5878 2, 2, "sProcess (name or number): \nnSignal code: ",
5879 doc
: /* Send PROCESS the signal with code SIGCODE.
5880 PROCESS may also be an integer specifying the process id of the
5881 process to signal; in this case, the process need not be a child of
5883 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
5885 Lisp_Object process
, sigcode
;
5889 if (INTEGERP (process
))
5895 if (STRINGP (process
))
5898 if (tem
= Fget_process (process
), NILP (tem
))
5900 pid
= Fstring_to_number (process
, make_number (10));
5901 if (XINT (pid
) != 0)
5907 process
= get_process (process
);
5912 CHECK_PROCESS (process
);
5913 pid
= XPROCESS (process
)->pid
;
5914 if (!INTEGERP (pid
) || XINT (pid
) <= 0)
5915 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
5919 #define handle_signal(NAME, VALUE) \
5920 else if (!strcmp (name, NAME)) \
5921 XSETINT (sigcode, VALUE)
5923 if (INTEGERP (sigcode
))
5927 unsigned char *name
;
5929 CHECK_SYMBOL (sigcode
);
5930 name
= SDATA (SYMBOL_NAME (sigcode
));
5935 handle_signal ("SIGHUP", SIGHUP
);
5938 handle_signal ("SIGINT", SIGINT
);
5941 handle_signal ("SIGQUIT", SIGQUIT
);
5944 handle_signal ("SIGILL", SIGILL
);
5947 handle_signal ("SIGABRT", SIGABRT
);
5950 handle_signal ("SIGEMT", SIGEMT
);
5953 handle_signal ("SIGKILL", SIGKILL
);
5956 handle_signal ("SIGFPE", SIGFPE
);
5959 handle_signal ("SIGBUS", SIGBUS
);
5962 handle_signal ("SIGSEGV", SIGSEGV
);
5965 handle_signal ("SIGSYS", SIGSYS
);
5968 handle_signal ("SIGPIPE", SIGPIPE
);
5971 handle_signal ("SIGALRM", SIGALRM
);
5974 handle_signal ("SIGTERM", SIGTERM
);
5977 handle_signal ("SIGURG", SIGURG
);
5980 handle_signal ("SIGSTOP", SIGSTOP
);
5983 handle_signal ("SIGTSTP", SIGTSTP
);
5986 handle_signal ("SIGCONT", SIGCONT
);
5989 handle_signal ("SIGCHLD", SIGCHLD
);
5992 handle_signal ("SIGTTIN", SIGTTIN
);
5995 handle_signal ("SIGTTOU", SIGTTOU
);
5998 handle_signal ("SIGIO", SIGIO
);
6001 handle_signal ("SIGXCPU", SIGXCPU
);
6004 handle_signal ("SIGXFSZ", SIGXFSZ
);
6007 handle_signal ("SIGVTALRM", SIGVTALRM
);
6010 handle_signal ("SIGPROF", SIGPROF
);
6013 handle_signal ("SIGWINCH", SIGWINCH
);
6016 handle_signal ("SIGINFO", SIGINFO
);
6019 handle_signal ("SIGUSR1", SIGUSR1
);
6022 handle_signal ("SIGUSR2", SIGUSR2
);
6025 error ("Undefined signal name %s", name
);
6028 #undef handle_signal
6030 return make_number (kill (XINT (pid
), XINT (sigcode
)));
6033 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6034 doc
: /* Make PROCESS see end-of-file in its input.
6035 EOF comes after any text already sent to it.
6036 PROCESS may be a process, a buffer, the name of a process or buffer, or
6037 nil, indicating the current buffer's process.
6038 If PROCESS is a network connection, or is a process communicating
6039 through a pipe (as opposed to a pty), then you cannot send any more
6040 text to PROCESS after you call this function. */)
6042 Lisp_Object process
;
6045 struct coding_system
*coding
;
6047 if (DATAGRAM_CONN_P (process
))
6050 proc
= get_process (process
);
6051 coding
= proc_encode_coding_system
[XINT (XPROCESS (proc
)->outfd
)];
6053 /* Make sure the process is really alive. */
6054 if (! NILP (XPROCESS (proc
)->raw_status_low
))
6055 update_status (XPROCESS (proc
));
6056 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6057 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6059 if (CODING_REQUIRE_FLUSHING (coding
))
6061 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6062 send_process (proc
, "", 0, Qnil
);
6066 send_process (proc
, "\032", 1, Qnil
); /* ^z */
6068 if (!NILP (XPROCESS (proc
)->pty_flag
))
6069 send_process (proc
, "\004", 1, Qnil
);
6072 int old_outfd
, new_outfd
;
6074 #ifdef HAVE_SHUTDOWN
6075 /* If this is a network connection, or socketpair is used
6076 for communication with the subprocess, call shutdown to cause EOF.
6077 (In some old system, shutdown to socketpair doesn't work.
6078 Then we just can't win.) */
6079 if (NILP (XPROCESS (proc
)->pid
)
6080 || XINT (XPROCESS (proc
)->outfd
) == XINT (XPROCESS (proc
)->infd
))
6081 shutdown (XINT (XPROCESS (proc
)->outfd
), 1);
6082 /* In case of socketpair, outfd == infd, so don't close it. */
6083 if (XINT (XPROCESS (proc
)->outfd
) != XINT (XPROCESS (proc
)->infd
))
6084 emacs_close (XINT (XPROCESS (proc
)->outfd
));
6085 #else /* not HAVE_SHUTDOWN */
6086 emacs_close (XINT (XPROCESS (proc
)->outfd
));
6087 #endif /* not HAVE_SHUTDOWN */
6088 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6089 old_outfd
= XINT (XPROCESS (proc
)->outfd
);
6091 if (!proc_encode_coding_system
[new_outfd
])
6092 proc_encode_coding_system
[new_outfd
]
6093 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6094 bcopy (proc_encode_coding_system
[old_outfd
],
6095 proc_encode_coding_system
[new_outfd
],
6096 sizeof (struct coding_system
));
6097 bzero (proc_encode_coding_system
[old_outfd
],
6098 sizeof (struct coding_system
));
6100 XSETINT (XPROCESS (proc
)->outfd
, new_outfd
);
6106 /* Kill all processes associated with `buffer'.
6107 If `buffer' is nil, kill all processes */
6110 kill_buffer_processes (buffer
)
6113 Lisp_Object tail
, proc
;
6115 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6117 proc
= XCDR (XCAR (tail
));
6118 if (GC_PROCESSP (proc
)
6119 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
6121 if (NETCONN_P (proc
))
6122 Fdelete_process (proc
);
6123 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
6124 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
6129 /* On receipt of a signal that a child status has changed, loop asking
6130 about children with changed statuses until the system says there
6133 All we do is change the status; we do not run sentinels or print
6134 notifications. That is saved for the next time keyboard input is
6135 done, in order to avoid timing errors.
6137 ** WARNING: this can be called during garbage collection.
6138 Therefore, it must not be fooled by the presence of mark bits in
6141 ** USG WARNING: Although it is not obvious from the documentation
6142 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6143 signal() before executing at least one wait(), otherwise the
6144 handler will be called again, resulting in an infinite loop. The
6145 relevant portion of the documentation reads "SIGCLD signals will be
6146 queued and the signal-catching function will be continually
6147 reentered until the queue is empty". Invoking signal() causes the
6148 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6151 ** Malloc WARNING: This should never call malloc either directly or
6152 indirectly; if it does, that is a bug */
6155 sigchld_handler (signo
)
6158 int old_errno
= errno
;
6160 register struct Lisp_Process
*p
;
6161 extern EMACS_TIME
*input_available_clear_time
;
6163 SIGNAL_THREAD_CHECK (signo
);
6167 sigheld
|= sigbit (SIGCHLD
);
6179 #endif /* no WUNTRACED */
6180 /* Keep trying to get a status until we get a definitive result. */
6184 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
6186 while (pid
< 0 && errno
== EINTR
);
6190 /* PID == 0 means no processes found, PID == -1 means a real
6191 failure. We have done all our job, so return. */
6193 /* USG systems forget handlers when they are used;
6194 must reestablish each time */
6195 #if defined (USG) && !defined (POSIX_SIGNALS)
6196 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
6199 sigheld
&= ~sigbit (SIGCHLD
);
6207 #endif /* no WNOHANG */
6209 /* Find the process that signaled us, and record its status. */
6212 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6214 proc
= XCDR (XCAR (tail
));
6215 p
= XPROCESS (proc
);
6216 if (GC_EQ (p
->childp
, Qt
) && XINT (p
->pid
) == pid
)
6221 /* Look for an asynchronous process whose pid hasn't been filled
6224 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6226 proc
= XCDR (XCAR (tail
));
6227 p
= XPROCESS (proc
);
6228 if (GC_INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
6233 /* Change the status of the process that was found. */
6236 union { int i
; WAITTYPE wt
; } u
;
6237 int clear_desc_flag
= 0;
6239 XSETINT (p
->tick
, ++process_tick
);
6241 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
6242 XSETINT (p
->raw_status_high
, u
.i
>> 16);
6244 /* If process has terminated, stop waiting for its output. */
6245 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6246 && XINT (p
->infd
) >= 0)
6247 clear_desc_flag
= 1;
6249 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6250 if (clear_desc_flag
)
6252 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
6253 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
6256 /* Tell wait_reading_process_output that it needs to wake up and
6258 if (input_available_clear_time
)
6259 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6262 /* There was no asynchronous process found for that id. Check
6263 if we have a synchronous process. */
6266 synch_process_alive
= 0;
6268 /* Report the status of the synchronous process. */
6270 synch_process_retcode
= WRETCODE (w
);
6271 else if (WIFSIGNALED (w
))
6272 synch_process_termsig
= WTERMSIG (w
);
6274 /* Tell wait_reading_process_output that it needs to wake up and
6276 if (input_available_clear_time
)
6277 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6280 /* On some systems, we must return right away.
6281 If any more processes want to signal us, we will
6283 Otherwise (on systems that have WNOHANG), loop around
6284 to use up all the processes that have something to tell us. */
6285 #if (defined WINDOWSNT \
6286 || (defined USG && !defined GNU_LINUX \
6287 && !(defined HPUX && defined WNOHANG)))
6288 #if defined (USG) && ! defined (POSIX_SIGNALS)
6289 signal (signo
, sigchld_handler
);
6293 #endif /* USG, but not HPUX with WNOHANG */
6299 exec_sentinel_unwind (data
)
6302 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
6307 exec_sentinel_error_handler (error
)
6310 cmd_error_internal (error
, "error in process sentinel: ");
6312 update_echo_area ();
6313 Fsleep_for (make_number (2), Qnil
);
6318 exec_sentinel (proc
, reason
)
6319 Lisp_Object proc
, reason
;
6321 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
6322 register struct Lisp_Process
*p
= XPROCESS (proc
);
6323 int count
= SPECPDL_INDEX ();
6324 int outer_running_asynch_code
= running_asynch_code
;
6325 int waiting
= waiting_for_user_input_p
;
6327 /* No need to gcpro these, because all we do with them later
6328 is test them for EQness, and none of them should be a string. */
6329 odeactivate
= Vdeactivate_mark
;
6330 XSETBUFFER (obuffer
, current_buffer
);
6331 okeymap
= current_buffer
->keymap
;
6333 sentinel
= p
->sentinel
;
6334 if (NILP (sentinel
))
6337 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6338 assure that it gets restored no matter how the sentinel exits. */
6340 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6341 /* Inhibit quit so that random quits don't screw up a running filter. */
6342 specbind (Qinhibit_quit
, Qt
);
6343 specbind (Qlast_nonmenu_event
, Qt
);
6345 /* In case we get recursively called,
6346 and we already saved the match data nonrecursively,
6347 save the same match data in safely recursive fashion. */
6348 if (outer_running_asynch_code
)
6351 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6352 restore_search_regs ();
6353 record_unwind_save_match_data ();
6354 Fset_match_data (tem
, Qt
);
6357 /* For speed, if a search happens within this code,
6358 save the match data in a special nonrecursive fashion. */
6359 running_asynch_code
= 1;
6361 internal_condition_case_1 (read_process_output_call
,
6363 Fcons (proc
, Fcons (reason
, Qnil
))),
6364 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6365 exec_sentinel_error_handler
);
6367 /* If we saved the match data nonrecursively, restore it now. */
6368 restore_search_regs ();
6369 running_asynch_code
= outer_running_asynch_code
;
6371 Vdeactivate_mark
= odeactivate
;
6373 /* Restore waiting_for_user_input_p as it was
6374 when we were called, in case the filter clobbered it. */
6375 waiting_for_user_input_p
= waiting
;
6378 if (! EQ (Fcurrent_buffer (), obuffer
)
6379 || ! EQ (current_buffer
->keymap
, okeymap
))
6381 /* But do it only if the caller is actually going to read events.
6382 Otherwise there's no need to make him wake up, and it could
6383 cause trouble (for example it would make Fsit_for return). */
6384 if (waiting_for_user_input_p
== -1)
6385 record_asynch_buffer_change ();
6387 unbind_to (count
, Qnil
);
6390 /* Report all recent events of a change in process status
6391 (either run the sentinel or output a message).
6392 This is usually done while Emacs is waiting for keyboard input
6393 but can be done at other times. */
6398 register Lisp_Object proc
, buffer
;
6399 Lisp_Object tail
, msg
;
6400 struct gcpro gcpro1
, gcpro2
;
6404 /* We need to gcpro tail; if read_process_output calls a filter
6405 which deletes a process and removes the cons to which tail points
6406 from Vprocess_alist, and then causes a GC, tail is an unprotected
6410 /* Set this now, so that if new processes are created by sentinels
6411 that we run, we get called again to handle their status changes. */
6412 update_tick
= process_tick
;
6414 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
6417 register struct Lisp_Process
*p
;
6419 proc
= Fcdr (Fcar (tail
));
6420 p
= XPROCESS (proc
);
6422 if (XINT (p
->tick
) != XINT (p
->update_tick
))
6424 XSETINT (p
->update_tick
, XINT (p
->tick
));
6426 /* If process is still active, read any output that remains. */
6427 while (! EQ (p
->filter
, Qt
)
6428 && ! EQ (p
->status
, Qconnect
)
6429 && ! EQ (p
->status
, Qlisten
)
6430 && ! EQ (p
->command
, Qt
) /* Network process not stopped. */
6431 && XINT (p
->infd
) >= 0
6432 && read_process_output (proc
, XINT (p
->infd
)) > 0);
6436 /* Get the text to use for the message. */
6437 if (!NILP (p
->raw_status_low
))
6439 msg
= status_message (p
);
6441 /* If process is terminated, deactivate it or delete it. */
6443 if (CONSP (p
->status
))
6444 symbol
= XCAR (p
->status
);
6446 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6447 || EQ (symbol
, Qclosed
))
6449 if (delete_exited_processes
)
6450 remove_process (proc
);
6452 deactivate_process (proc
);
6455 /* The actions above may have further incremented p->tick.
6456 So set p->update_tick again
6457 so that an error in the sentinel will not cause
6458 this code to be run again. */
6459 XSETINT (p
->update_tick
, XINT (p
->tick
));
6460 /* Now output the message suitably. */
6461 if (!NILP (p
->sentinel
))
6462 exec_sentinel (proc
, msg
);
6463 /* Don't bother with a message in the buffer
6464 when a process becomes runnable. */
6465 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6467 Lisp_Object ro
, tem
;
6468 struct buffer
*old
= current_buffer
;
6469 int opoint
, opoint_byte
;
6470 int before
, before_byte
;
6472 ro
= XBUFFER (buffer
)->read_only
;
6474 /* Avoid error if buffer is deleted
6475 (probably that's why the process is dead, too) */
6476 if (NILP (XBUFFER (buffer
)->name
))
6478 Fset_buffer (buffer
);
6481 opoint_byte
= PT_BYTE
;
6482 /* Insert new output into buffer
6483 at the current end-of-output marker,
6484 thus preserving logical ordering of input and output. */
6485 if (XMARKER (p
->mark
)->buffer
)
6486 Fgoto_char (p
->mark
);
6488 SET_PT_BOTH (ZV
, ZV_BYTE
);
6491 before_byte
= PT_BYTE
;
6493 tem
= current_buffer
->read_only
;
6494 current_buffer
->read_only
= Qnil
;
6495 insert_string ("\nProcess ");
6496 Finsert (1, &p
->name
);
6497 insert_string (" ");
6499 current_buffer
->read_only
= tem
;
6500 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6502 if (opoint
>= before
)
6503 SET_PT_BOTH (opoint
+ (PT
- before
),
6504 opoint_byte
+ (PT_BYTE
- before_byte
));
6506 SET_PT_BOTH (opoint
, opoint_byte
);
6508 set_buffer_internal (old
);
6513 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6514 redisplay_preserve_echo_area (13);
6520 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6521 Sset_process_coding_system
, 1, 3, 0,
6522 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6523 DECODING will be used to decode subprocess output and ENCODING to
6524 encode subprocess input. */)
6525 (process
, decoding
, encoding
)
6526 register Lisp_Object process
, decoding
, encoding
;
6528 register struct Lisp_Process
*p
;
6530 CHECK_PROCESS (process
);
6531 p
= XPROCESS (process
);
6532 if (XINT (p
->infd
) < 0)
6533 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6534 if (XINT (p
->outfd
) < 0)
6535 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6536 Fcheck_coding_system (decoding
);
6537 Fcheck_coding_system (encoding
);
6539 p
->decode_coding_system
= decoding
;
6540 p
->encode_coding_system
= encoding
;
6541 setup_process_coding_systems (process
);
6546 DEFUN ("process-coding-system",
6547 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6548 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6550 register Lisp_Object process
;
6552 CHECK_PROCESS (process
);
6553 return Fcons (XPROCESS (process
)->decode_coding_system
,
6554 XPROCESS (process
)->encode_coding_system
);
6557 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6558 Sset_process_filter_multibyte
, 2, 2, 0,
6559 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6560 If FLAG is non-nil, the filter is given multibyte strings.
6561 If FLAG is nil, the filter is given unibyte strings. In this case,
6562 all character code conversion except for end-of-line conversion is
6565 Lisp_Object process
, flag
;
6567 register struct Lisp_Process
*p
;
6569 CHECK_PROCESS (process
);
6570 p
= XPROCESS (process
);
6571 p
->filter_multibyte
= flag
;
6572 setup_process_coding_systems (process
);
6577 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6578 Sprocess_filter_multibyte_p
, 1, 1, 0,
6579 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6581 Lisp_Object process
;
6583 register struct Lisp_Process
*p
;
6585 CHECK_PROCESS (process
);
6586 p
= XPROCESS (process
);
6588 return (NILP (p
->filter_multibyte
) ? Qnil
: Qt
);
6593 /* Add DESC to the set of keyboard input descriptors. */
6596 add_keyboard_wait_descriptor (desc
)
6599 FD_SET (desc
, &input_wait_mask
);
6600 FD_SET (desc
, &non_process_wait_mask
);
6601 if (desc
> max_keyboard_desc
)
6602 max_keyboard_desc
= desc
;
6605 /* From now on, do not expect DESC to give keyboard input. */
6608 delete_keyboard_wait_descriptor (desc
)
6612 int lim
= max_keyboard_desc
;
6614 FD_CLR (desc
, &input_wait_mask
);
6615 FD_CLR (desc
, &non_process_wait_mask
);
6617 if (desc
== max_keyboard_desc
)
6618 for (fd
= 0; fd
< lim
; fd
++)
6619 if (FD_ISSET (fd
, &input_wait_mask
)
6620 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6621 max_keyboard_desc
= fd
;
6624 /* Return nonzero if *MASK has a bit set
6625 that corresponds to one of the keyboard input descriptors. */
6628 keyboard_bit_set (mask
)
6633 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
6634 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6635 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6648 if (! noninteractive
|| initialized
)
6650 signal (SIGCHLD
, sigchld_handler
);
6653 FD_ZERO (&input_wait_mask
);
6654 FD_ZERO (&non_keyboard_wait_mask
);
6655 FD_ZERO (&non_process_wait_mask
);
6656 max_process_desc
= 0;
6658 #ifdef NON_BLOCKING_CONNECT
6659 FD_ZERO (&connect_wait_mask
);
6660 num_pending_connects
= 0;
6663 #ifdef ADAPTIVE_READ_BUFFERING
6664 process_output_delay_count
= 0;
6665 process_output_skip
= 0;
6668 /* Don't do this, it caused infinite select loops. The display
6669 method should call add_keyboard_wait_descriptor on stdin if it
6672 FD_SET (0, &input_wait_mask
);
6675 Vprocess_alist
= Qnil
;
6676 for (i
= 0; i
< MAXDESC
; i
++)
6678 chan_process
[i
] = Qnil
;
6679 proc_buffered_char
[i
] = -1;
6681 bzero (proc_decode_coding_system
, sizeof proc_decode_coding_system
);
6682 bzero (proc_encode_coding_system
, sizeof proc_encode_coding_system
);
6683 #ifdef DATAGRAM_SOCKETS
6684 bzero (datagram_address
, sizeof datagram_address
);
6689 Lisp_Object subfeatures
= Qnil
;
6690 struct socket_options
*sopt
;
6692 #define ADD_SUBFEATURE(key, val) \
6693 subfeatures = Fcons (Fcons (key, Fcons (val, Qnil)), subfeatures)
6695 #ifdef NON_BLOCKING_CONNECT
6696 ADD_SUBFEATURE (QCnowait
, Qt
);
6698 #ifdef DATAGRAM_SOCKETS
6699 ADD_SUBFEATURE (QCtype
, Qdatagram
);
6701 #ifdef HAVE_LOCAL_SOCKETS
6702 ADD_SUBFEATURE (QCfamily
, Qlocal
);
6704 #ifdef HAVE_GETSOCKNAME
6705 ADD_SUBFEATURE (QCservice
, Qt
);
6707 #if !defined(TERM) && (defined(O_NONBLOCK) || defined(O_NDELAY))
6708 ADD_SUBFEATURE (QCserver
, Qt
);
6711 for (sopt
= socket_options
; sopt
->name
; sopt
++)
6712 subfeatures
= Fcons (intern (sopt
->name
), subfeatures
);
6714 Fprovide (intern ("make-network-process"), subfeatures
);
6716 #endif /* HAVE_SOCKETS */
6718 #if defined (DARWIN) || defined (MAC_OSX)
6719 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
6720 processes. As such, we only change the default value. */
6723 char *release
= get_operating_system_release();
6724 if (!release
|| !release
[0] || (release
[0] < MIN_PTY_KERNEL_VERSION
6725 && release
[1] == '.')) {
6726 Vprocess_connection_type
= Qnil
;
6735 Qprocessp
= intern ("processp");
6736 staticpro (&Qprocessp
);
6737 Qrun
= intern ("run");
6739 Qstop
= intern ("stop");
6741 Qsignal
= intern ("signal");
6742 staticpro (&Qsignal
);
6744 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
6747 Qexit = intern ("exit");
6748 staticpro (&Qexit); */
6750 Qopen
= intern ("open");
6752 Qclosed
= intern ("closed");
6753 staticpro (&Qclosed
);
6754 Qconnect
= intern ("connect");
6755 staticpro (&Qconnect
);
6756 Qfailed
= intern ("failed");
6757 staticpro (&Qfailed
);
6758 Qlisten
= intern ("listen");
6759 staticpro (&Qlisten
);
6760 Qlocal
= intern ("local");
6761 staticpro (&Qlocal
);
6762 Qdatagram
= intern ("datagram");
6763 staticpro (&Qdatagram
);
6765 QCname
= intern (":name");
6766 staticpro (&QCname
);
6767 QCbuffer
= intern (":buffer");
6768 staticpro (&QCbuffer
);
6769 QChost
= intern (":host");
6770 staticpro (&QChost
);
6771 QCservice
= intern (":service");
6772 staticpro (&QCservice
);
6773 QCtype
= intern (":type");
6774 staticpro (&QCtype
);
6775 QClocal
= intern (":local");
6776 staticpro (&QClocal
);
6777 QCremote
= intern (":remote");
6778 staticpro (&QCremote
);
6779 QCcoding
= intern (":coding");
6780 staticpro (&QCcoding
);
6781 QCserver
= intern (":server");
6782 staticpro (&QCserver
);
6783 QCnowait
= intern (":nowait");
6784 staticpro (&QCnowait
);
6785 QCsentinel
= intern (":sentinel");
6786 staticpro (&QCsentinel
);
6787 QClog
= intern (":log");
6789 QCnoquery
= intern (":noquery");
6790 staticpro (&QCnoquery
);
6791 QCstop
= intern (":stop");
6792 staticpro (&QCstop
);
6793 QCoptions
= intern (":options");
6794 staticpro (&QCoptions
);
6795 QCplist
= intern (":plist");
6796 staticpro (&QCplist
);
6797 QCfilter_multibyte
= intern (":filter-multibyte");
6798 staticpro (&QCfilter_multibyte
);
6800 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
6801 staticpro (&Qlast_nonmenu_event
);
6803 staticpro (&Vprocess_alist
);
6805 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
6806 doc
: /* *Non-nil means delete processes immediately when they exit.
6807 nil means don't delete them until `list-processes' is run. */);
6809 delete_exited_processes
= 1;
6811 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
6812 doc
: /* Control type of device used to communicate with subprocesses.
6813 Values are nil to use a pipe, or t or `pty' to use a pty.
6814 The value has no effect if the system has no ptys or if all ptys are busy:
6815 then a pipe is used in any case.
6816 The value takes effect when `start-process' is called. */);
6817 Vprocess_connection_type
= Qt
;
6819 #ifdef ADAPTIVE_READ_BUFFERING
6820 DEFVAR_LISP ("process-adaptive-read-buffering", &Vprocess_adaptive_read_buffering
,
6821 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
6822 On some systems, when Emacs reads the output from a subprocess, the output data
6823 is read in very small blocks, potentially resulting in very poor performance.
6824 This behavior can be remedied to some extent by setting this variable to a
6825 non-nil value, as it will automatically delay reading from such processes, to
6826 allowing them to produce more output before Emacs tries to read it.
6827 If the value is t, the delay is reset after each write to the process; any other
6828 non-nil value means that the delay is not reset on write.
6829 The variable takes effect when `start-process' is called. */);
6830 Vprocess_adaptive_read_buffering
= Qt
;
6833 defsubr (&Sprocessp
);
6834 defsubr (&Sget_process
);
6835 defsubr (&Sget_buffer_process
);
6836 defsubr (&Sdelete_process
);
6837 defsubr (&Sprocess_status
);
6838 defsubr (&Sprocess_exit_status
);
6839 defsubr (&Sprocess_id
);
6840 defsubr (&Sprocess_name
);
6841 defsubr (&Sprocess_tty_name
);
6842 defsubr (&Sprocess_command
);
6843 defsubr (&Sset_process_buffer
);
6844 defsubr (&Sprocess_buffer
);
6845 defsubr (&Sprocess_mark
);
6846 defsubr (&Sset_process_filter
);
6847 defsubr (&Sprocess_filter
);
6848 defsubr (&Sset_process_sentinel
);
6849 defsubr (&Sprocess_sentinel
);
6850 defsubr (&Sset_process_window_size
);
6851 defsubr (&Sset_process_inherit_coding_system_flag
);
6852 defsubr (&Sprocess_inherit_coding_system_flag
);
6853 defsubr (&Sset_process_query_on_exit_flag
);
6854 defsubr (&Sprocess_query_on_exit_flag
);
6855 defsubr (&Sprocess_contact
);
6856 defsubr (&Sprocess_plist
);
6857 defsubr (&Sset_process_plist
);
6858 defsubr (&Slist_processes
);
6859 defsubr (&Sprocess_list
);
6860 defsubr (&Sstart_process
);
6862 defsubr (&Sset_network_process_option
);
6863 defsubr (&Smake_network_process
);
6864 defsubr (&Sformat_network_address
);
6865 #endif /* HAVE_SOCKETS */
6866 #if defined(HAVE_SOCKETS) && defined(HAVE_NET_IF_H) && defined(HAVE_SYS_IOCTL_H)
6868 defsubr (&Snetwork_interface_list
);
6870 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
6871 defsubr (&Snetwork_interface_info
);
6873 #endif /* HAVE_SOCKETS ... */
6874 #ifdef DATAGRAM_SOCKETS
6875 defsubr (&Sprocess_datagram_address
);
6876 defsubr (&Sset_process_datagram_address
);
6878 defsubr (&Saccept_process_output
);
6879 defsubr (&Sprocess_send_region
);
6880 defsubr (&Sprocess_send_string
);
6881 defsubr (&Sinterrupt_process
);
6882 defsubr (&Skill_process
);
6883 defsubr (&Squit_process
);
6884 defsubr (&Sstop_process
);
6885 defsubr (&Scontinue_process
);
6886 defsubr (&Sprocess_running_child_p
);
6887 defsubr (&Sprocess_send_eof
);
6888 defsubr (&Ssignal_process
);
6889 defsubr (&Swaiting_for_user_input_p
);
6890 /* defsubr (&Sprocess_connection); */
6891 defsubr (&Sset_process_coding_system
);
6892 defsubr (&Sprocess_coding_system
);
6893 defsubr (&Sset_process_filter_multibyte
);
6894 defsubr (&Sprocess_filter_multibyte_p
);
6898 #else /* not subprocesses */
6900 #include <sys/types.h>
6904 #include "systime.h"
6905 #include "charset.h"
6907 #include "termopts.h"
6908 #include "sysselect.h"
6910 extern int frame_garbaged
;
6912 extern EMACS_TIME
timer_check ();
6913 extern int timers_run
;
6917 /* As described above, except assuming that there are no subprocesses:
6919 Wait for timeout to elapse and/or keyboard input to be available.
6922 timeout in seconds, or
6923 zero for no limit, or
6924 -1 means gobble data immediately available but don't wait for any.
6926 read_kbd is a Lisp_Object:
6927 0 to ignore keyboard input, or
6928 1 to return when input is available, or
6929 -1 means caller will actually read the input, so don't throw to
6932 see full version for other parameters. We know that wait_proc will
6933 always be NULL, since `subprocesses' isn't defined.
6935 do_display != 0 means redisplay should be done to show subprocess
6936 output that arrives.
6938 Return true iff we received input from any process. */
6941 wait_reading_process_output (time_limit
, microsecs
, read_kbd
, do_display
,
6942 wait_for_cell
, wait_proc
, just_wait_proc
)
6943 int time_limit
, microsecs
, read_kbd
, do_display
;
6944 Lisp_Object wait_for_cell
;
6945 struct Lisp_Process
*wait_proc
;
6949 EMACS_TIME end_time
, timeout
;
6950 SELECT_TYPE waitchannels
;
6953 /* What does time_limit really mean? */
6954 if (time_limit
|| microsecs
)
6956 EMACS_GET_TIME (end_time
);
6957 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
6958 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6961 /* Turn off periodic alarms (in case they are in use)
6962 and then turn off any other atimers,
6963 because the select emulator uses alarms. */
6965 turn_on_atimers (0);
6969 int timeout_reduced_for_timers
= 0;
6971 /* If calling from keyboard input, do not quit
6972 since we want to return C-g as an input character.
6973 Otherwise, do pending quit if requested. */
6977 /* Exit now if the cell we're waiting for became non-nil. */
6978 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6981 /* Compute time from now till when time limit is up */
6982 /* Exit if already run out */
6983 if (time_limit
== -1)
6985 /* -1 specified for timeout means
6986 gobble output available now
6987 but don't wait at all. */
6989 EMACS_SET_SECS_USECS (timeout
, 0, 0);
6991 else if (time_limit
|| microsecs
)
6993 EMACS_GET_TIME (timeout
);
6994 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6995 if (EMACS_TIME_NEG_P (timeout
))
7000 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
7003 /* If our caller will not immediately handle keyboard events,
7004 run timer events directly.
7005 (Callers that will immediately read keyboard events
7006 call timer_delay on their own.) */
7007 if (NILP (wait_for_cell
))
7009 EMACS_TIME timer_delay
;
7013 int old_timers_run
= timers_run
;
7014 timer_delay
= timer_check (1);
7015 if (timers_run
!= old_timers_run
&& do_display
)
7016 /* We must retry, since a timer may have requeued itself
7017 and that could alter the time delay. */
7018 redisplay_preserve_echo_area (14);
7022 while (!detect_input_pending ());
7024 /* If there is unread keyboard input, also return. */
7026 && requeued_events_pending_p ())
7029 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
7031 EMACS_TIME difference
;
7032 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
7033 if (EMACS_TIME_NEG_P (difference
))
7035 timeout
= timer_delay
;
7036 timeout_reduced_for_timers
= 1;
7041 /* Cause C-g and alarm signals to take immediate action,
7042 and cause input available signals to zero out timeout. */
7044 set_waiting_for_input (&timeout
);
7046 /* Wait till there is something to do. */
7048 if (! read_kbd
&& NILP (wait_for_cell
))
7049 FD_ZERO (&waitchannels
);
7051 FD_SET (0, &waitchannels
);
7053 /* If a frame has been newly mapped and needs updating,
7054 reprocess its display stuff. */
7055 if (frame_garbaged
&& do_display
)
7057 clear_waiting_for_input ();
7058 redisplay_preserve_echo_area (15);
7060 set_waiting_for_input (&timeout
);
7063 if (read_kbd
&& detect_input_pending ())
7066 FD_ZERO (&waitchannels
);
7069 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
7074 /* Make C-g and alarm signals set flags again */
7075 clear_waiting_for_input ();
7077 /* If we woke up due to SIGWINCH, actually change size now. */
7078 do_pending_window_change (0);
7080 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
7081 /* We waited the full specified time, so return now. */
7086 /* If the system call was interrupted, then go around the
7088 if (xerrno
== EINTR
)
7089 FD_ZERO (&waitchannels
);
7091 error ("select error: %s", emacs_strerror (xerrno
));
7094 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
7095 /* System sometimes fails to deliver SIGIO. */
7096 kill (getpid (), SIGIO
);
7099 if (read_kbd
&& interrupt_input
&& (waitchannels
& 1))
7100 kill (getpid (), SIGIO
);
7103 /* Check for keyboard input */
7106 && detect_input_pending_run_timers (do_display
))
7108 swallow_events (do_display
);
7109 if (detect_input_pending_run_timers (do_display
))
7113 /* If there is unread keyboard input, also return. */
7115 && requeued_events_pending_p ())
7118 /* If wait_for_cell. check for keyboard input
7119 but don't run any timers.
7120 ??? (It seems wrong to me to check for keyboard
7121 input at all when wait_for_cell, but the code
7122 has been this way since July 1994.
7123 Try changing this after version 19.31.) */
7124 if (! NILP (wait_for_cell
)
7125 && detect_input_pending ())
7127 swallow_events (do_display
);
7128 if (detect_input_pending ())
7132 /* Exit now if the cell we're waiting for became non-nil. */
7133 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7143 /* Don't confuse make-docfile by having two doc strings for this function.
7144 make-docfile does not pay attention to #if, for good reason! */
7145 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7148 register Lisp_Object name
;
7153 /* Don't confuse make-docfile by having two doc strings for this function.
7154 make-docfile does not pay attention to #if, for good reason! */
7155 DEFUN ("process-inherit-coding-system-flag",
7156 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7160 register Lisp_Object process
;
7162 /* Ignore the argument and return the value of
7163 inherit-process-coding-system. */
7164 return inherit_process_coding_system
? Qt
: Qnil
;
7167 /* Kill all processes associated with `buffer'.
7168 If `buffer' is nil, kill all processes.
7169 Since we have no subprocesses, this does nothing. */
7172 kill_buffer_processes (buffer
)
7185 QCtype
= intern (":type");
7186 staticpro (&QCtype
);
7188 defsubr (&Sget_buffer_process
);
7189 defsubr (&Sprocess_inherit_coding_system_flag
);
7193 #endif /* not subprocesses */
7195 /* arch-tag: 3706c011-7b9a-4117-bd4f-59e7f701a4c4
7196 (do not change this comment) */