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>
129 #include "termhooks.h"
130 #include "termopts.h"
131 #include "commands.h"
132 #include "keyboard.h"
134 #include "blockinput.h"
135 #include "dispextern.h"
136 #include "composite.h"
139 Lisp_Object Qprocessp
;
140 Lisp_Object Qrun
, Qstop
, Qsignal
;
141 Lisp_Object Qopen
, Qclosed
, Qconnect
, Qfailed
, Qlisten
;
142 Lisp_Object Qlocal
, Qdatagram
;
143 Lisp_Object QCname
, QCbuffer
, QChost
, QCservice
, QCtype
;
144 Lisp_Object QClocal
, QCremote
, QCcoding
;
145 Lisp_Object QCserver
, QCnowait
, QCnoquery
, QCstop
;
146 Lisp_Object QCsentinel
, QClog
, QCoptions
, QCplist
;
147 Lisp_Object QCfilter_multibyte
;
148 Lisp_Object Qlast_nonmenu_event
;
149 /* QCfamily is declared and initialized in xfaces.c,
150 QCfilter in keyboard.c. */
151 extern Lisp_Object QCfamily
, QCfilter
;
153 /* Qexit is declared and initialized in eval.c. */
155 /* QCfamily is defined in xfaces.c. */
156 extern Lisp_Object QCfamily
;
157 /* QCfilter is defined in keyboard.c. */
158 extern Lisp_Object QCfilter
;
160 /* a process object is a network connection when its childp field is neither
161 Qt nor Qnil but is instead a property list (KEY VAL ...). */
164 #define NETCONN_P(p) (GC_CONSP (XPROCESS (p)->childp))
165 #define NETCONN1_P(p) (GC_CONSP ((p)->childp))
167 #define NETCONN_P(p) 0
168 #define NETCONN1_P(p) 0
169 #endif /* HAVE_SOCKETS */
171 /* Define first descriptor number available for subprocesses. */
173 #define FIRST_PROC_DESC 1
175 #define FIRST_PROC_DESC 3
178 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
181 #if !defined (SIGCHLD) && defined (SIGCLD)
182 #define SIGCHLD SIGCLD
185 #include "syssignal.h"
189 extern void set_waiting_for_input
P_ ((EMACS_TIME
*));
190 extern char *get_operating_system_release ();
196 extern char *sys_errlist
[];
203 /* t means use pty, nil means use a pipe,
204 maybe other values to come. */
205 static Lisp_Object Vprocess_connection_type
;
209 #include <sys/socket.h>
213 /* These next two vars are non-static since sysdep.c uses them in the
214 emulation of `select'. */
215 /* Number of events of change of status of a process. */
217 /* Number of events for which the user or sentinel has been notified. */
220 /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */
222 #ifdef BROKEN_NON_BLOCKING_CONNECT
223 #undef NON_BLOCKING_CONNECT
225 #ifndef NON_BLOCKING_CONNECT
228 #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX)
229 #if defined (O_NONBLOCK) || defined (O_NDELAY)
230 #if defined (EWOULDBLOCK) || defined (EINPROGRESS)
231 #define NON_BLOCKING_CONNECT
232 #endif /* EWOULDBLOCK || EINPROGRESS */
233 #endif /* O_NONBLOCK || O_NDELAY */
234 #endif /* HAVE_GETPEERNAME || GNU_LINUX */
235 #endif /* HAVE_SELECT */
236 #endif /* HAVE_SOCKETS */
237 #endif /* NON_BLOCKING_CONNECT */
238 #endif /* BROKEN_NON_BLOCKING_CONNECT */
240 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
241 this system. We need to read full packets, so we need a
242 "non-destructive" select. So we require either native select,
243 or emulation of select using FIONREAD. */
245 #ifdef BROKEN_DATAGRAM_SOCKETS
246 #undef DATAGRAM_SOCKETS
248 #ifndef DATAGRAM_SOCKETS
250 #if defined (HAVE_SELECT) || defined (FIONREAD)
251 #if defined (HAVE_SENDTO) && defined (HAVE_RECVFROM) && defined (EMSGSIZE)
252 #define DATAGRAM_SOCKETS
253 #endif /* HAVE_SENDTO && HAVE_RECVFROM && EMSGSIZE */
254 #endif /* HAVE_SELECT || FIONREAD */
255 #endif /* HAVE_SOCKETS */
256 #endif /* DATAGRAM_SOCKETS */
257 #endif /* BROKEN_DATAGRAM_SOCKETS */
260 #undef NON_BLOCKING_CONNECT
261 #undef DATAGRAM_SOCKETS
264 #if !defined (ADAPTIVE_READ_BUFFERING) && !defined (NO_ADAPTIVE_READ_BUFFERING)
265 #ifdef EMACS_HAS_USECS
266 #define ADAPTIVE_READ_BUFFERING
270 #ifdef ADAPTIVE_READ_BUFFERING
271 #define READ_OUTPUT_DELAY_INCREMENT 10000
272 #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5)
273 #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7)
275 /* Number of processes which might be delayed. */
277 static int process_output_delay_count
;
279 /* Non-zero if any process has non-nil process_output_skip. */
281 static int process_output_skip
;
283 /* Non-nil means to delay reading process output to improve buffering.
284 A value of t means that delay is reset after each send, any other
285 non-nil value does not reset the delay. */
286 static Lisp_Object Vprocess_adaptive_read_buffering
;
288 #define process_output_delay_count 0
292 #include "sysselect.h"
294 extern int keyboard_bit_set
P_ ((SELECT_TYPE
*));
296 /* If we support a window system, turn on the code to poll periodically
297 to detect C-g. It isn't actually used when doing interrupt input. */
298 #ifdef HAVE_WINDOW_SYSTEM
299 #define POLL_FOR_INPUT
302 /* Mask of bits indicating the descriptors that we wait for input on. */
304 static SELECT_TYPE input_wait_mask
;
306 /* Mask that excludes keyboard input descriptor (s). */
308 static SELECT_TYPE non_keyboard_wait_mask
;
310 /* Mask that excludes process input descriptor (s). */
312 static SELECT_TYPE non_process_wait_mask
;
314 #ifdef NON_BLOCKING_CONNECT
315 /* Mask of bits indicating the descriptors that we wait for connect to
316 complete on. Once they complete, they are removed from this mask
317 and added to the input_wait_mask and non_keyboard_wait_mask. */
319 static SELECT_TYPE connect_wait_mask
;
321 /* Number of bits set in connect_wait_mask. */
322 static int num_pending_connects
;
324 #define IF_NON_BLOCKING_CONNECT(s) s
326 #define IF_NON_BLOCKING_CONNECT(s)
329 /* The largest descriptor currently in use for a process object. */
330 static int max_process_desc
;
332 /* The largest descriptor currently in use for keyboard input. */
333 static int max_keyboard_desc
;
335 /* Nonzero means delete a process right away if it exits. */
336 static int delete_exited_processes
;
338 /* Indexed by descriptor, gives the process (if any) for that descriptor */
339 Lisp_Object chan_process
[MAXDESC
];
341 /* Alist of elements (NAME . PROCESS) */
342 Lisp_Object Vprocess_alist
;
344 /* Buffered-ahead input char from process, indexed by channel.
345 -1 means empty (no char is buffered).
346 Used on sys V where the only way to tell if there is any
347 output from the process is to read at least one char.
348 Always -1 on systems that support FIONREAD. */
350 /* Don't make static; need to access externally. */
351 int proc_buffered_char
[MAXDESC
];
353 /* Table of `struct coding-system' for each process. */
354 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
355 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
357 #ifdef DATAGRAM_SOCKETS
358 /* Table of `partner address' for datagram sockets. */
359 struct sockaddr_and_len
{
362 } datagram_address
[MAXDESC
];
363 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
364 #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XINT (XPROCESS (proc)->infd)].sa != 0)
366 #define DATAGRAM_CHAN_P(chan) (0)
367 #define DATAGRAM_CONN_P(proc) (0)
370 static Lisp_Object
get_process ();
371 static void exec_sentinel ();
373 extern EMACS_TIME
timer_check ();
374 extern int timers_run
;
376 /* Maximum number of bytes to send to a pty without an eof. */
377 static int pty_max_bytes
;
383 /* The file name of the pty opened by allocate_pty. */
385 static char pty_name
[24];
388 /* Compute the Lisp form of the process status, p->status, from
389 the numeric status that was returned by `wait'. */
391 Lisp_Object
status_convert ();
395 struct Lisp_Process
*p
;
397 union { int i
; WAITTYPE wt
; } u
;
398 u
.i
= XFASTINT (p
->raw_status_low
) + (XFASTINT (p
->raw_status_high
) << 16);
399 p
->status
= status_convert (u
.wt
);
400 p
->raw_status_low
= Qnil
;
401 p
->raw_status_high
= Qnil
;
404 /* Convert a process status word in Unix format to
405 the list that we use internally. */
412 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
413 else if (WIFEXITED (w
))
414 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
415 WCOREDUMP (w
) ? Qt
: Qnil
));
416 else if (WIFSIGNALED (w
))
417 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
418 WCOREDUMP (w
) ? Qt
: Qnil
));
423 /* Given a status-list, extract the three pieces of information
424 and store them individually through the three pointers. */
427 decode_status (l
, symbol
, code
, coredump
)
445 *code
= XFASTINT (XCAR (tem
));
447 *coredump
= !NILP (tem
);
451 /* Return a string describing a process status list. */
455 struct Lisp_Process
*p
;
457 Lisp_Object status
= p
->status
;
460 Lisp_Object string
, string2
;
462 decode_status (status
, &symbol
, &code
, &coredump
);
464 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
467 synchronize_system_messages_locale ();
468 signame
= strsignal (code
);
471 string
= build_string (signame
);
472 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
473 SSET (string
, 0, DOWNCASE (SREF (string
, 0)));
474 return concat2 (string
, string2
);
476 else if (EQ (symbol
, Qexit
))
479 return build_string (code
== 0 ? "deleted\n" : "connection broken by remote peer\n");
481 return build_string ("finished\n");
482 string
= Fnumber_to_string (make_number (code
));
483 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
484 return concat3 (build_string ("exited abnormally with code "),
487 else if (EQ (symbol
, Qfailed
))
489 string
= Fnumber_to_string (make_number (code
));
490 string2
= build_string ("\n");
491 return concat3 (build_string ("failed with code "),
495 return Fcopy_sequence (Fsymbol_name (symbol
));
500 /* Open an available pty, returning a file descriptor.
501 Return -1 on failure.
502 The file name of the terminal corresponding to the pty
503 is left in the variable pty_name. */
514 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
515 for (i
= 0; i
< 16; i
++)
518 struct stat stb
; /* Used in some PTY_OPEN. */
519 #ifdef PTY_NAME_SPRINTF
522 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
523 #endif /* no PTY_NAME_SPRINTF */
527 #else /* no PTY_OPEN */
530 /* Unusual IRIS code */
531 *ptyv
= emacs_open ("/dev/ptc", O_RDWR
| O_NDELAY
, 0);
534 if (fstat (fd
, &stb
) < 0)
536 # else /* not IRIS */
537 { /* Some systems name their pseudoterminals so that there are gaps in
538 the usual sequence - for example, on HP9000/S700 systems, there
539 are no pseudoterminals with names ending in 'f'. So we wait for
540 three failures in a row before deciding that we've reached the
542 int failed_count
= 0;
544 if (stat (pty_name
, &stb
) < 0)
547 if (failed_count
>= 3)
554 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
556 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
558 # endif /* not IRIS */
560 #endif /* no PTY_OPEN */
564 /* check to make certain that both sides are available
565 this avoids a nasty yet stupid bug in rlogins */
566 #ifdef PTY_TTY_NAME_SPRINTF
569 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
570 #endif /* no PTY_TTY_NAME_SPRINTF */
572 if (access (pty_name
, 6) != 0)
575 # if !defined(IRIS) && !defined(__sgi)
581 #endif /* not UNIPLUS */
588 #endif /* HAVE_PTYS */
594 register Lisp_Object val
, tem
, name1
;
595 register struct Lisp_Process
*p
;
599 p
= allocate_process ();
601 XSETINT (p
->infd
, -1);
602 XSETINT (p
->outfd
, -1);
603 XSETFASTINT (p
->pid
, 0);
604 XSETFASTINT (p
->tick
, 0);
605 XSETFASTINT (p
->update_tick
, 0);
606 p
->raw_status_low
= Qnil
;
607 p
->raw_status_high
= Qnil
;
609 p
->mark
= Fmake_marker ();
611 #ifdef ADAPTIVE_READ_BUFFERING
612 p
->adaptive_read_buffering
= Qnil
;
613 XSETFASTINT (p
->read_output_delay
, 0);
614 p
->read_output_skip
= Qnil
;
617 /* If name is already in use, modify it until it is unused. */
622 tem
= Fget_process (name1
);
623 if (NILP (tem
)) break;
624 sprintf (suffix
, "<%d>", i
);
625 name1
= concat2 (name
, build_string (suffix
));
629 XSETPROCESS (val
, p
);
630 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
635 remove_process (proc
)
636 register Lisp_Object proc
;
638 register Lisp_Object pair
;
640 pair
= Frassq (proc
, Vprocess_alist
);
641 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
643 deactivate_process (proc
);
646 /* Setup coding systems of PROCESS. */
649 setup_process_coding_systems (process
)
652 struct Lisp_Process
*p
= XPROCESS (process
);
653 int inch
= XINT (p
->infd
);
654 int outch
= XINT (p
->outfd
);
656 if (inch
< 0 || outch
< 0)
659 if (!proc_decode_coding_system
[inch
])
660 proc_decode_coding_system
[inch
]
661 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
662 setup_coding_system (p
->decode_coding_system
,
663 proc_decode_coding_system
[inch
]);
664 if (! NILP (p
->filter
))
666 if (NILP (p
->filter_multibyte
))
667 setup_raw_text_coding_system (proc_decode_coding_system
[inch
]);
669 else if (BUFFERP (p
->buffer
))
671 if (NILP (XBUFFER (p
->buffer
)->enable_multibyte_characters
))
672 setup_raw_text_coding_system (proc_decode_coding_system
[inch
]);
675 if (!proc_encode_coding_system
[outch
])
676 proc_encode_coding_system
[outch
]
677 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
678 setup_coding_system (p
->encode_coding_system
,
679 proc_encode_coding_system
[outch
]);
682 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
683 doc
: /* Return t if OBJECT is a process. */)
687 return PROCESSP (object
) ? Qt
: Qnil
;
690 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
691 doc
: /* Return the process named NAME, or nil if there is none. */)
693 register Lisp_Object name
;
698 return Fcdr (Fassoc (name
, Vprocess_alist
));
701 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
702 doc
: /* Return the (or a) process associated with BUFFER.
703 BUFFER may be a buffer or the name of one. */)
705 register Lisp_Object buffer
;
707 register Lisp_Object buf
, tail
, proc
;
709 if (NILP (buffer
)) return Qnil
;
710 buf
= Fget_buffer (buffer
);
711 if (NILP (buf
)) return Qnil
;
713 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
715 proc
= Fcdr (Fcar (tail
));
716 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
722 /* This is how commands for the user decode process arguments. It
723 accepts a process, a process name, a buffer, a buffer name, or nil.
724 Buffers denote the first process in the buffer, and nil denotes the
729 register Lisp_Object name
;
731 register Lisp_Object proc
, obj
;
734 obj
= Fget_process (name
);
736 obj
= Fget_buffer (name
);
738 error ("Process %s does not exist", SDATA (name
));
740 else if (NILP (name
))
741 obj
= Fcurrent_buffer ();
745 /* Now obj should be either a buffer object or a process object.
749 proc
= Fget_buffer_process (obj
);
751 error ("Buffer %s has no process", SDATA (XBUFFER (obj
)->name
));
761 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
762 doc
: /* Delete PROCESS: kill it and forget about it immediately.
763 PROCESS may be a process, a buffer, the name of a process or buffer, or
764 nil, indicating the current buffer's process. */)
766 register Lisp_Object process
;
768 process
= get_process (process
);
769 XPROCESS (process
)->raw_status_low
= Qnil
;
770 XPROCESS (process
)->raw_status_high
= Qnil
;
771 if (NETCONN_P (process
))
773 XPROCESS (process
)->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
774 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
777 else if (XINT (XPROCESS (process
)->infd
) >= 0)
779 Fkill_process (process
, Qnil
);
780 /* Do this now, since remove_process will make sigchld_handler do nothing. */
781 XPROCESS (process
)->status
782 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
783 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
786 remove_process (process
);
790 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
791 doc
: /* Return the status of PROCESS.
792 The returned value is one of the following symbols:
793 run -- for a process that is running.
794 stop -- for a process stopped but continuable.
795 exit -- for a process that has exited.
796 signal -- for a process that has got a fatal signal.
797 open -- for a network stream connection that is open.
798 listen -- for a network stream server that is listening.
799 closed -- for a network stream connection that is closed.
800 connect -- when waiting for a non-blocking connection to complete.
801 failed -- when a non-blocking connection has failed.
802 nil -- if arg is a process name and no such process exists.
803 PROCESS may be a process, a buffer, the name of a process, or
804 nil, indicating the current buffer's process. */)
806 register Lisp_Object process
;
808 register struct Lisp_Process
*p
;
809 register Lisp_Object status
;
811 if (STRINGP (process
))
812 process
= Fget_process (process
);
814 process
= get_process (process
);
819 p
= XPROCESS (process
);
820 if (!NILP (p
->raw_status_low
))
824 status
= XCAR (status
);
827 if (EQ (status
, Qexit
))
829 else if (EQ (p
->command
, Qt
))
831 else if (EQ (status
, Qrun
))
837 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
839 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
840 If PROCESS has not yet exited or died, return 0. */)
842 register Lisp_Object process
;
844 CHECK_PROCESS (process
);
845 if (!NILP (XPROCESS (process
)->raw_status_low
))
846 update_status (XPROCESS (process
));
847 if (CONSP (XPROCESS (process
)->status
))
848 return XCAR (XCDR (XPROCESS (process
)->status
));
849 return make_number (0);
852 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
853 doc
: /* Return the process id of PROCESS.
854 This is the pid of the external process which PROCESS uses or talks to.
855 For a network connection, this value is nil. */)
857 register Lisp_Object process
;
859 CHECK_PROCESS (process
);
860 return XPROCESS (process
)->pid
;
863 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
864 doc
: /* Return the name of PROCESS, as a string.
865 This is the name of the program invoked in PROCESS,
866 possibly modified to make it unique among process names. */)
868 register Lisp_Object process
;
870 CHECK_PROCESS (process
);
871 return XPROCESS (process
)->name
;
874 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
875 doc
: /* Return the command that was executed to start PROCESS.
876 This is a list of strings, the first string being the program executed
877 and the rest of the strings being the arguments given to it.
878 For a non-child channel, this is nil. */)
880 register Lisp_Object process
;
882 CHECK_PROCESS (process
);
883 return XPROCESS (process
)->command
;
886 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
887 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
888 This is the terminal that the process itself reads and writes on,
889 not the name of the pty that Emacs uses to talk with that terminal. */)
891 register Lisp_Object process
;
893 CHECK_PROCESS (process
);
894 return XPROCESS (process
)->tty_name
;
897 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
899 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil). */)
901 register Lisp_Object process
, buffer
;
903 struct Lisp_Process
*p
;
905 CHECK_PROCESS (process
);
907 CHECK_BUFFER (buffer
);
908 p
= XPROCESS (process
);
911 p
->childp
= Fplist_put (p
->childp
, QCbuffer
, buffer
);
912 setup_process_coding_systems (process
);
916 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
918 doc
: /* Return the buffer PROCESS is associated with.
919 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
921 register Lisp_Object process
;
923 CHECK_PROCESS (process
);
924 return XPROCESS (process
)->buffer
;
927 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
929 doc
: /* Return the marker for the end of the last output from PROCESS. */)
931 register Lisp_Object process
;
933 CHECK_PROCESS (process
);
934 return XPROCESS (process
)->mark
;
937 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
939 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
940 t means stop accepting output from the process.
942 When a process has a filter, its buffer is not used for output.
943 Instead, each time it does output, the entire string of output is
944 passed to the filter.
946 The filter gets two arguments: the process and the string of output.
947 The string argument is normally a multibyte string, except:
948 - if the process' input coding system is no-conversion or raw-text,
949 it is a unibyte string (the non-converted input), or else
950 - if `default-enable-multibyte-characters' is nil, it is a unibyte
951 string (the result of converting the decoded input multibyte
952 string to unibyte with `string-make-unibyte'). */)
954 register Lisp_Object process
, filter
;
956 struct Lisp_Process
*p
;
958 CHECK_PROCESS (process
);
959 p
= XPROCESS (process
);
961 /* Don't signal an error if the process' input file descriptor
962 is closed. This could make debugging Lisp more difficult,
963 for example when doing something like
965 (setq process (start-process ...))
967 (set-process-filter process ...) */
969 if (XINT (p
->infd
) >= 0)
971 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
973 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
974 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
976 else if (EQ (p
->filter
, Qt
)
977 && !EQ (p
->command
, Qt
)) /* Network process not stopped. */
979 FD_SET (XINT (p
->infd
), &input_wait_mask
);
980 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
986 p
->childp
= Fplist_put (p
->childp
, QCfilter
, filter
);
987 setup_process_coding_systems (process
);
991 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
993 doc
: /* Returns the filter function of PROCESS; nil if none.
994 See `set-process-filter' for more info on filter functions. */)
996 register Lisp_Object process
;
998 CHECK_PROCESS (process
);
999 return XPROCESS (process
)->filter
;
1002 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
1004 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
1005 The sentinel is called as a function when the process changes state.
1006 It gets two arguments: the process, and a string describing the change. */)
1008 register Lisp_Object process
, sentinel
;
1010 struct Lisp_Process
*p
;
1012 CHECK_PROCESS (process
);
1013 p
= XPROCESS (process
);
1015 p
->sentinel
= sentinel
;
1017 p
->childp
= Fplist_put (p
->childp
, QCsentinel
, sentinel
);
1021 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1023 doc
: /* Return the sentinel of PROCESS; nil if none.
1024 See `set-process-sentinel' for more info on sentinels. */)
1026 register Lisp_Object process
;
1028 CHECK_PROCESS (process
);
1029 return XPROCESS (process
)->sentinel
;
1032 DEFUN ("set-process-window-size", Fset_process_window_size
,
1033 Sset_process_window_size
, 3, 3, 0,
1034 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1035 (process
, height
, width
)
1036 register Lisp_Object process
, height
, width
;
1038 CHECK_PROCESS (process
);
1039 CHECK_NATNUM (height
);
1040 CHECK_NATNUM (width
);
1042 if (XINT (XPROCESS (process
)->infd
) < 0
1043 || set_window_size (XINT (XPROCESS (process
)->infd
),
1044 XINT (height
), XINT (width
)) <= 0)
1050 DEFUN ("set-process-inherit-coding-system-flag",
1051 Fset_process_inherit_coding_system_flag
,
1052 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1053 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1054 If the second argument FLAG is non-nil, then the variable
1055 `buffer-file-coding-system' of the buffer associated with PROCESS
1056 will be bound to the value of the coding system used to decode
1059 This is useful when the coding system specified for the process buffer
1060 leaves either the character code conversion or the end-of-line conversion
1061 unspecified, or if the coding system used to decode the process output
1062 is more appropriate for saving the process buffer.
1064 Binding the variable `inherit-process-coding-system' to non-nil before
1065 starting the process is an alternative way of setting the inherit flag
1066 for the process which will run. */)
1068 register Lisp_Object process
, flag
;
1070 CHECK_PROCESS (process
);
1071 XPROCESS (process
)->inherit_coding_system_flag
= flag
;
1075 DEFUN ("process-inherit-coding-system-flag",
1076 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
1078 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
1079 If this flag is t, `buffer-file-coding-system' of the buffer
1080 associated with PROCESS will inherit the coding system used to decode
1081 the process output. */)
1083 register Lisp_Object process
;
1085 CHECK_PROCESS (process
);
1086 return XPROCESS (process
)->inherit_coding_system_flag
;
1089 DEFUN ("set-process-query-on-exit-flag",
1090 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1092 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1093 If the second argument FLAG is non-nil, Emacs will query the user before
1094 exiting if PROCESS is running. */)
1096 register Lisp_Object process
, flag
;
1098 CHECK_PROCESS (process
);
1099 XPROCESS (process
)->kill_without_query
= Fnull (flag
);
1103 DEFUN ("process-query-on-exit-flag",
1104 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1106 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1108 register Lisp_Object process
;
1110 CHECK_PROCESS (process
);
1111 return Fnull (XPROCESS (process
)->kill_without_query
);
1114 #ifdef DATAGRAM_SOCKETS
1115 Lisp_Object
Fprocess_datagram_address ();
1118 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1120 doc
: /* Return the contact info of PROCESS; t for a real child.
1121 For a net connection, the value depends on the optional KEY arg.
1122 If KEY is nil, value is a cons cell of the form (HOST SERVICE),
1123 if KEY is t, the complete contact information for the connection is
1124 returned, else the specific value for the keyword KEY is returned.
1125 See `make-network-process' for a list of keywords. */)
1127 register Lisp_Object process
, key
;
1129 Lisp_Object contact
;
1131 CHECK_PROCESS (process
);
1132 contact
= XPROCESS (process
)->childp
;
1134 #ifdef DATAGRAM_SOCKETS
1135 if (DATAGRAM_CONN_P (process
)
1136 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1137 contact
= Fplist_put (contact
, QCremote
,
1138 Fprocess_datagram_address (process
));
1141 if (!NETCONN_P (process
) || EQ (key
, Qt
))
1144 return Fcons (Fplist_get (contact
, QChost
),
1145 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1146 return Fplist_get (contact
, key
);
1149 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1151 doc
: /* Return the plist of PROCESS. */)
1153 register Lisp_Object process
;
1155 CHECK_PROCESS (process
);
1156 return XPROCESS (process
)->plist
;
1159 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1161 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1163 register Lisp_Object process
, plist
;
1165 CHECK_PROCESS (process
);
1168 XPROCESS (process
)->plist
= plist
;
1172 #if 0 /* Turned off because we don't currently record this info
1173 in the process. Perhaps add it. */
1174 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1175 doc
: /* Return the connection type of PROCESS.
1176 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1177 a socket connection. */)
1179 Lisp_Object process
;
1181 return XPROCESS (process
)->type
;
1186 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1188 doc
: /* Convert network ADDRESS from internal format to a string.
1189 If optional second argument OMIT-PORT is non-nil, don't include a port
1190 number in the string; in this case, interpret a 4 element vector as an
1191 IP address. Returns nil if format of ADDRESS is invalid. */)
1192 (address
, omit_port
)
1193 Lisp_Object address
, omit_port
;
1198 if (STRINGP (address
)) /* AF_LOCAL */
1201 if (VECTORP (address
)) /* AF_INET */
1203 register struct Lisp_Vector
*p
= XVECTOR (address
);
1204 Lisp_Object args
[6];
1207 if (!NILP (omit_port
) && (p
->size
== 4 || p
->size
== 5))
1209 args
[0] = build_string ("%d.%d.%d.%d");
1212 else if (p
->size
== 5)
1214 args
[0] = build_string ("%d.%d.%d.%d:%d");
1220 for (i
= 0; i
< nargs
; i
++)
1221 args
[i
+1] = p
->contents
[i
];
1222 return Fformat (nargs
+1, args
);
1225 if (CONSP (address
))
1227 Lisp_Object args
[2];
1228 args
[0] = build_string ("<Family %d>");
1229 args
[1] = Fcar (address
);
1230 return Fformat (2, args
);
1239 list_processes_1 (query_only
)
1240 Lisp_Object query_only
;
1242 register Lisp_Object tail
, tem
;
1243 Lisp_Object proc
, minspace
, tem1
;
1244 register struct Lisp_Process
*p
;
1246 int w_proc
, w_buffer
, w_tty
;
1247 Lisp_Object i_status
, i_buffer
, i_tty
, i_command
;
1249 w_proc
= 4; /* Proc */
1250 w_buffer
= 6; /* Buffer */
1251 w_tty
= 0; /* Omit if no ttys */
1253 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
1257 proc
= Fcdr (Fcar (tail
));
1258 p
= XPROCESS (proc
);
1259 if (NILP (p
->childp
))
1261 if (!NILP (query_only
) && !NILP (p
->kill_without_query
))
1263 if (STRINGP (p
->name
)
1264 && ( i
= SCHARS (p
->name
), (i
> w_proc
)))
1266 if (!NILP (p
->buffer
))
1268 if (NILP (XBUFFER (p
->buffer
)->name
) && w_buffer
< 8)
1269 w_buffer
= 8; /* (Killed) */
1270 else if ((i
= SCHARS (XBUFFER (p
->buffer
)->name
), (i
> w_buffer
)))
1273 if (STRINGP (p
->tty_name
)
1274 && (i
= SCHARS (p
->tty_name
), (i
> w_tty
)))
1278 XSETFASTINT (i_status
, w_proc
+ 1);
1279 XSETFASTINT (i_buffer
, XFASTINT (i_status
) + 9);
1282 XSETFASTINT (i_tty
, XFASTINT (i_buffer
) + w_buffer
+ 1);
1283 XSETFASTINT (i_command
, XFASTINT (i_buffer
) + w_tty
+ 1);
1286 XSETFASTINT (i_command
, XFASTINT (i_buffer
) + w_buffer
+ 1);
1289 XSETFASTINT (minspace
, 1);
1291 set_buffer_internal (XBUFFER (Vstandard_output
));
1292 current_buffer
->undo_list
= Qt
;
1294 current_buffer
->truncate_lines
= Qt
;
1296 write_string ("Proc", -1);
1297 Findent_to (i_status
, minspace
); write_string ("Status", -1);
1298 Findent_to (i_buffer
, minspace
); write_string ("Buffer", -1);
1301 Findent_to (i_tty
, minspace
); write_string ("Tty", -1);
1303 Findent_to (i_command
, minspace
); write_string ("Command", -1);
1304 write_string ("\n", -1);
1306 write_string ("----", -1);
1307 Findent_to (i_status
, minspace
); write_string ("------", -1);
1308 Findent_to (i_buffer
, minspace
); write_string ("------", -1);
1311 Findent_to (i_tty
, minspace
); write_string ("---", -1);
1313 Findent_to (i_command
, minspace
); write_string ("-------", -1);
1314 write_string ("\n", -1);
1316 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
1320 proc
= Fcdr (Fcar (tail
));
1321 p
= XPROCESS (proc
);
1322 if (NILP (p
->childp
))
1324 if (!NILP (query_only
) && !NILP (p
->kill_without_query
))
1327 Finsert (1, &p
->name
);
1328 Findent_to (i_status
, minspace
);
1330 if (!NILP (p
->raw_status_low
))
1333 if (CONSP (p
->status
))
1334 symbol
= XCAR (p
->status
);
1337 if (EQ (symbol
, Qsignal
))
1340 tem
= Fcar (Fcdr (p
->status
));
1342 if (XINT (tem
) < NSIG
)
1343 write_string (sys_errlist
[XINT (tem
)], -1);
1346 Fprinc (symbol
, Qnil
);
1348 else if (NETCONN1_P (p
))
1350 if (EQ (symbol
, Qexit
))
1351 write_string ("closed", -1);
1352 else if (EQ (p
->command
, Qt
))
1353 write_string ("stopped", -1);
1354 else if (EQ (symbol
, Qrun
))
1355 write_string ("open", -1);
1357 Fprinc (symbol
, Qnil
);
1360 Fprinc (symbol
, Qnil
);
1362 if (EQ (symbol
, Qexit
))
1365 tem
= Fcar (Fcdr (p
->status
));
1368 sprintf (tembuf
, " %d", (int) XFASTINT (tem
));
1369 write_string (tembuf
, -1);
1373 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
1374 remove_process (proc
);
1376 Findent_to (i_buffer
, minspace
);
1377 if (NILP (p
->buffer
))
1378 insert_string ("(none)");
1379 else if (NILP (XBUFFER (p
->buffer
)->name
))
1380 insert_string ("(Killed)");
1382 Finsert (1, &XBUFFER (p
->buffer
)->name
);
1386 Findent_to (i_tty
, minspace
);
1387 if (STRINGP (p
->tty_name
))
1388 Finsert (1, &p
->tty_name
);
1391 Findent_to (i_command
, minspace
);
1393 if (EQ (p
->status
, Qlisten
))
1395 Lisp_Object port
= Fplist_get (p
->childp
, QCservice
);
1396 if (INTEGERP (port
))
1397 port
= Fnumber_to_string (port
);
1399 port
= Fformat_network_address (Fplist_get (p
->childp
, QClocal
), Qnil
);
1400 sprintf (tembuf
, "(network %s server on %s)\n",
1401 (DATAGRAM_CHAN_P (XINT (p
->infd
)) ? "datagram" : "stream"),
1402 (STRINGP (port
) ? (char *)SDATA (port
) : "?"));
1403 insert_string (tembuf
);
1405 else if (NETCONN1_P (p
))
1407 /* For a local socket, there is no host name,
1408 so display service instead. */
1409 Lisp_Object host
= Fplist_get (p
->childp
, QChost
);
1410 if (!STRINGP (host
))
1412 host
= Fplist_get (p
->childp
, QCservice
);
1413 if (INTEGERP (host
))
1414 host
= Fnumber_to_string (host
);
1417 host
= Fformat_network_address (Fplist_get (p
->childp
, QCremote
), Qnil
);
1418 sprintf (tembuf
, "(network %s connection to %s)\n",
1419 (DATAGRAM_CHAN_P (XINT (p
->infd
)) ? "datagram" : "stream"),
1420 (STRINGP (host
) ? (char *)SDATA (host
) : "?"));
1421 insert_string (tembuf
);
1433 insert_string (" ");
1435 insert_string ("\n");
1441 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 1, "P",
1442 doc
: /* Display a list of all processes.
1443 If optional argument QUERY-ONLY is non-nil, only processes with
1444 the query-on-exit flag set will be listed.
1445 Any process listed as exited or signaled is actually eliminated
1446 after the listing is made. */)
1448 Lisp_Object query_only
;
1450 internal_with_output_to_temp_buffer ("*Process List*",
1451 list_processes_1
, query_only
);
1455 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1456 doc
: /* Return a list of all processes. */)
1459 return Fmapcar (Qcdr
, Vprocess_alist
);
1462 /* Starting asynchronous inferior processes. */
1464 static Lisp_Object
start_process_unwind ();
1466 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1467 doc
: /* Start a program in a subprocess. Return the process object for it.
1468 NAME is name for process. It is modified if necessary to make it unique.
1469 BUFFER is the buffer (or buffer name) to associate with the process.
1470 Process output goes at end of that buffer, unless you specify
1471 an output stream or filter function to handle the output.
1472 BUFFER may be also nil, meaning that this process is not associated
1474 PROGRAM is the program file name. It is searched for in PATH.
1475 Remaining arguments are strings to give program as arguments.
1477 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1480 register Lisp_Object
*args
;
1482 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1484 register unsigned char *new_argv
;
1487 register unsigned char **new_argv
;
1490 int count
= SPECPDL_INDEX ();
1494 buffer
= Fget_buffer_create (buffer
);
1496 /* Make sure that the child will be able to chdir to the current
1497 buffer's current directory, or its unhandled equivalent. We
1498 can't just have the child check for an error when it does the
1499 chdir, since it's in a vfork.
1501 We have to GCPRO around this because Fexpand_file_name and
1502 Funhandled_file_name_directory might call a file name handling
1503 function. The argument list is protected by the caller, so all
1504 we really have to worry about is buffer. */
1506 struct gcpro gcpro1
, gcpro2
;
1508 current_dir
= current_buffer
->directory
;
1510 GCPRO2 (buffer
, current_dir
);
1513 = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir
),
1515 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1516 report_file_error ("Setting current directory",
1517 Fcons (current_buffer
->directory
, Qnil
));
1523 CHECK_STRING (name
);
1527 CHECK_STRING (program
);
1529 proc
= make_process (name
);
1530 /* If an error occurs and we can't start the process, we want to
1531 remove it from the process list. This means that each error
1532 check in create_process doesn't need to call remove_process
1533 itself; it's all taken care of here. */
1534 record_unwind_protect (start_process_unwind
, proc
);
1536 XPROCESS (proc
)->childp
= Qt
;
1537 XPROCESS (proc
)->plist
= Qnil
;
1538 XPROCESS (proc
)->command_channel_p
= Qnil
;
1539 XPROCESS (proc
)->buffer
= buffer
;
1540 XPROCESS (proc
)->sentinel
= Qnil
;
1541 XPROCESS (proc
)->filter
= Qnil
;
1542 XPROCESS (proc
)->filter_multibyte
1543 = buffer_defaults
.enable_multibyte_characters
;
1544 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1546 #ifdef ADAPTIVE_READ_BUFFERING
1547 XPROCESS (proc
)->adaptive_read_buffering
= Vprocess_adaptive_read_buffering
;
1550 /* Make the process marker point into the process buffer (if any). */
1552 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1553 BUF_ZV (XBUFFER (buffer
)),
1554 BUF_ZV_BYTE (XBUFFER (buffer
)));
1557 /* Decide coding systems for communicating with the process. Here
1558 we don't setup the structure coding_system nor pay attention to
1559 unibyte mode. They are done in create_process. */
1561 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1562 Lisp_Object coding_systems
= Qt
;
1563 Lisp_Object val
, *args2
;
1564 struct gcpro gcpro1
, gcpro2
;
1566 val
= Vcoding_system_for_read
;
1569 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1570 args2
[0] = Qstart_process
;
1571 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1572 GCPRO2 (proc
, current_dir
);
1573 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1575 if (CONSP (coding_systems
))
1576 val
= XCAR (coding_systems
);
1577 else if (CONSP (Vdefault_process_coding_system
))
1578 val
= XCAR (Vdefault_process_coding_system
);
1580 XPROCESS (proc
)->decode_coding_system
= val
;
1582 val
= Vcoding_system_for_write
;
1585 if (EQ (coding_systems
, Qt
))
1587 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof args2
);
1588 args2
[0] = Qstart_process
;
1589 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1590 GCPRO2 (proc
, current_dir
);
1591 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1594 if (CONSP (coding_systems
))
1595 val
= XCDR (coding_systems
);
1596 else if (CONSP (Vdefault_process_coding_system
))
1597 val
= XCDR (Vdefault_process_coding_system
);
1599 XPROCESS (proc
)->encode_coding_system
= val
;
1603 /* Make a one member argv with all args concatenated
1604 together separated by a blank. */
1605 len
= SBYTES (program
) + 2;
1606 for (i
= 3; i
< nargs
; i
++)
1610 len
+= SBYTES (tem
) + 1; /* count the blank */
1612 new_argv
= (unsigned char *) alloca (len
);
1613 strcpy (new_argv
, SDATA (program
));
1614 for (i
= 3; i
< nargs
; i
++)
1618 strcat (new_argv
, " ");
1619 strcat (new_argv
, SDATA (tem
));
1621 /* Need to add code here to check for program existence on VMS */
1624 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1626 /* If program file name is not absolute, search our path for it.
1627 Put the name we will really use in TEM. */
1628 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1629 && !(SCHARS (program
) > 1
1630 && IS_DEVICE_SEP (SREF (program
, 1))))
1632 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1635 GCPRO4 (name
, program
, buffer
, current_dir
);
1636 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1639 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1640 tem
= Fexpand_file_name (tem
, Qnil
);
1644 if (!NILP (Ffile_directory_p (program
)))
1645 error ("Specified program for new process is a directory");
1649 /* If program file name starts with /: for quoting a magic name,
1651 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1652 && SREF (tem
, 1) == ':')
1653 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1655 /* Encode the file name and put it in NEW_ARGV.
1656 That's where the child will use it to execute the program. */
1657 tem
= ENCODE_FILE (tem
);
1658 new_argv
[0] = SDATA (tem
);
1660 /* Here we encode arguments by the coding system used for sending
1661 data to the process. We don't support using different coding
1662 systems for encoding arguments and for encoding data sent to the
1665 for (i
= 3; i
< nargs
; i
++)
1669 if (STRING_MULTIBYTE (tem
))
1670 tem
= (code_convert_string_norecord
1671 (tem
, XPROCESS (proc
)->encode_coding_system
, 1));
1672 new_argv
[i
- 2] = SDATA (tem
);
1674 new_argv
[i
- 2] = 0;
1675 #endif /* not VMS */
1677 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
1678 XPROCESS (proc
)->decoding_carryover
= make_number (0);
1679 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
1680 XPROCESS (proc
)->encoding_carryover
= make_number (0);
1682 XPROCESS (proc
)->inherit_coding_system_flag
1683 = (NILP (buffer
) || !inherit_process_coding_system
1686 create_process (proc
, (char **) new_argv
, current_dir
);
1688 return unbind_to (count
, proc
);
1691 /* This function is the unwind_protect form for Fstart_process. If
1692 PROC doesn't have its pid set, then we know someone has signaled
1693 an error and the process wasn't started successfully, so we should
1694 remove it from the process list. */
1696 start_process_unwind (proc
)
1699 if (!PROCESSP (proc
))
1702 /* Was PROC started successfully? */
1703 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1704 remove_process (proc
);
1710 create_process_1 (timer
)
1711 struct atimer
*timer
;
1713 /* Nothing to do. */
1717 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1720 /* Mimic blocking of signals on system V, which doesn't really have it. */
1722 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1723 int sigchld_deferred
;
1726 create_process_sigchld ()
1728 signal (SIGCHLD
, create_process_sigchld
);
1730 sigchld_deferred
= 1;
1736 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1738 create_process (process
, new_argv
, current_dir
)
1739 Lisp_Object process
;
1741 Lisp_Object current_dir
;
1743 int pid
, inchannel
, outchannel
;
1745 #ifdef POSIX_SIGNALS
1748 struct sigaction sigint_action
;
1749 struct sigaction sigquit_action
;
1751 struct sigaction sighup_action
;
1753 #else /* !POSIX_SIGNALS */
1756 SIGTYPE (*sigchld
)();
1759 #endif /* !POSIX_SIGNALS */
1760 /* Use volatile to protect variables from being clobbered by longjmp. */
1761 volatile int forkin
, forkout
;
1762 volatile int pty_flag
= 0;
1764 extern char **environ
;
1767 inchannel
= outchannel
= -1;
1770 if (!NILP (Vprocess_connection_type
))
1771 outchannel
= inchannel
= allocate_pty ();
1775 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1776 /* On most USG systems it does not work to open the pty's tty here,
1777 then close it and reopen it in the child. */
1779 /* Don't let this terminal become our controlling terminal
1780 (in case we don't have one). */
1781 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1783 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1786 report_file_error ("Opening pty", Qnil
);
1788 forkin
= forkout
= -1;
1789 #endif /* not USG, or USG_SUBTTY_WORKS */
1793 #endif /* HAVE_PTYS */
1796 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1797 report_file_error ("Opening socketpair", Qnil
);
1798 outchannel
= inchannel
= sv
[0];
1799 forkout
= forkin
= sv
[1];
1801 #else /* not SKTPAIR */
1806 report_file_error ("Creating pipe", Qnil
);
1812 emacs_close (inchannel
);
1813 emacs_close (forkout
);
1814 report_file_error ("Creating pipe", Qnil
);
1819 #endif /* not SKTPAIR */
1822 /* Replaced by close_process_descs */
1823 set_exclusive_use (inchannel
);
1824 set_exclusive_use (outchannel
);
1827 /* Stride people say it's a mystery why this is needed
1828 as well as the O_NDELAY, but that it fails without this. */
1829 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1832 ioctl (inchannel
, FIONBIO
, &one
);
1837 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1838 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1841 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1842 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1846 /* Record this as an active process, with its channels.
1847 As a result, child_setup will close Emacs's side of the pipes. */
1848 chan_process
[inchannel
] = process
;
1849 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1850 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1852 /* Previously we recorded the tty descriptor used in the subprocess.
1853 It was only used for getting the foreground tty process, so now
1854 we just reopen the device (see emacs_get_tty_pgrp) as this is
1855 more portable (see USG_SUBTTY_WORKS above). */
1857 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1858 XPROCESS (process
)->status
= Qrun
;
1859 setup_process_coding_systems (process
);
1861 /* Delay interrupts until we have a chance to store
1862 the new fork's pid in its process structure */
1863 #ifdef POSIX_SIGNALS
1864 sigemptyset (&blocked
);
1866 sigaddset (&blocked
, SIGCHLD
);
1868 #ifdef HAVE_WORKING_VFORK
1869 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1870 this sets the parent's signal handlers as well as the child's.
1871 So delay all interrupts whose handlers the child might munge,
1872 and record the current handlers so they can be restored later. */
1873 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1874 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1876 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1878 #endif /* HAVE_WORKING_VFORK */
1879 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1880 #else /* !POSIX_SIGNALS */
1884 #else /* not BSD4_1 */
1885 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1886 sigsetmask (sigmask (SIGCHLD
));
1887 #else /* ordinary USG */
1889 sigchld_deferred
= 0;
1890 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1892 #endif /* ordinary USG */
1893 #endif /* not BSD4_1 */
1894 #endif /* SIGCHLD */
1895 #endif /* !POSIX_SIGNALS */
1897 FD_SET (inchannel
, &input_wait_mask
);
1898 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1899 if (inchannel
> max_process_desc
)
1900 max_process_desc
= inchannel
;
1902 /* Until we store the proper pid, enable sigchld_handler
1903 to recognize an unknown pid as standing for this process.
1904 It is very important not to let this `marker' value stay
1905 in the table after this function has returned; if it does
1906 it might cause call-process to hang and subsequent asynchronous
1907 processes to get their return values scrambled. */
1908 XSETINT (XPROCESS (process
)->pid
, -1);
1913 /* child_setup must clobber environ on systems with true vfork.
1914 Protect it from permanent change. */
1915 char **save_environ
= environ
;
1917 current_dir
= ENCODE_FILE (current_dir
);
1922 #endif /* not WINDOWSNT */
1924 int xforkin
= forkin
;
1925 int xforkout
= forkout
;
1927 #if 0 /* This was probably a mistake--it duplicates code later on,
1928 but fails to handle all the cases. */
1929 /* Make sure SIGCHLD is not blocked in the child. */
1930 sigsetmask (SIGEMPTYMASK
);
1933 /* Make the pty be the controlling terminal of the process. */
1935 /* First, disconnect its current controlling terminal. */
1937 /* We tried doing setsid only if pty_flag, but it caused
1938 process_set_signal to fail on SGI when using a pipe. */
1940 /* Make the pty's terminal the controlling terminal. */
1944 /* We ignore the return value
1945 because faith@cs.unc.edu says that is necessary on Linux. */
1946 ioctl (xforkin
, TIOCSCTTY
, 0);
1949 #else /* not HAVE_SETSID */
1951 /* It's very important to call setpgrp here and no time
1952 afterwards. Otherwise, we lose our controlling tty which
1953 is set when we open the pty. */
1956 #endif /* not HAVE_SETSID */
1957 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1958 if (pty_flag
&& xforkin
>= 0)
1961 tcgetattr (xforkin
, &t
);
1963 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1964 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1967 #if defined (NTTYDISC) && defined (TIOCSETD)
1968 if (pty_flag
&& xforkin
>= 0)
1970 /* Use new line discipline. */
1971 int ldisc
= NTTYDISC
;
1972 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1977 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1978 can do TIOCSPGRP only to the process's controlling tty. */
1981 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1982 I can't test it since I don't have 4.3. */
1983 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1984 ioctl (j
, TIOCNOTTY
, 0);
1987 /* In order to get a controlling terminal on some versions
1988 of BSD, it is necessary to put the process in pgrp 0
1989 before it opens the terminal. */
1997 #endif /* TIOCNOTTY */
1999 #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY)
2000 /*** There is a suggestion that this ought to be a
2001 conditional on TIOCSPGRP,
2002 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
2003 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
2004 that system does seem to need this code, even though
2005 both HAVE_SETSID and TIOCSCTTY are defined. */
2006 /* Now close the pty (if we had it open) and reopen it.
2007 This makes the pty the controlling terminal of the subprocess. */
2010 #ifdef SET_CHILD_PTY_PGRP
2011 int pgrp
= getpid ();
2014 /* I wonder if emacs_close (emacs_open (pty_name, ...))
2017 emacs_close (xforkin
);
2018 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
2022 emacs_write (1, "Couldn't open the pty terminal ", 31);
2023 emacs_write (1, pty_name
, strlen (pty_name
));
2024 emacs_write (1, "\n", 1);
2028 #ifdef SET_CHILD_PTY_PGRP
2029 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
2030 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
2033 #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */
2035 #ifdef SETUP_SLAVE_PTY
2040 #endif /* SETUP_SLAVE_PTY */
2042 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
2043 Now reenable it in the child, so it will die when we want it to. */
2045 signal (SIGHUP
, SIG_DFL
);
2047 #endif /* HAVE_PTYS */
2049 signal (SIGINT
, SIG_DFL
);
2050 signal (SIGQUIT
, SIG_DFL
);
2052 /* Stop blocking signals in the child. */
2053 #ifdef POSIX_SIGNALS
2054 sigprocmask (SIG_SETMASK
, &procmask
, 0);
2055 #else /* !POSIX_SIGNALS */
2059 #else /* not BSD4_1 */
2060 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
2061 sigsetmask (SIGEMPTYMASK
);
2062 #else /* ordinary USG */
2064 signal (SIGCHLD
, sigchld
);
2066 #endif /* ordinary USG */
2067 #endif /* not BSD4_1 */
2068 #endif /* SIGCHLD */
2069 #endif /* !POSIX_SIGNALS */
2072 child_setup_tty (xforkout
);
2074 pid
= child_setup (xforkin
, xforkout
, xforkout
,
2075 new_argv
, 1, current_dir
);
2076 #else /* not WINDOWSNT */
2077 child_setup (xforkin
, xforkout
, xforkout
,
2078 new_argv
, 1, current_dir
);
2079 #endif /* not WINDOWSNT */
2081 environ
= save_environ
;
2086 /* This runs in the Emacs process. */
2090 emacs_close (forkin
);
2091 if (forkin
!= forkout
&& forkout
>= 0)
2092 emacs_close (forkout
);
2096 /* vfork succeeded. */
2097 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
2100 register_child (pid
, inchannel
);
2101 #endif /* WINDOWSNT */
2103 /* If the subfork execv fails, and it exits,
2104 this close hangs. I don't know why.
2105 So have an interrupt jar it loose. */
2107 struct atimer
*timer
;
2111 EMACS_SET_SECS_USECS (offset
, 1, 0);
2112 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
2115 emacs_close (forkin
);
2117 cancel_atimer (timer
);
2121 if (forkin
!= forkout
&& forkout
>= 0)
2122 emacs_close (forkout
);
2126 XPROCESS (process
)->tty_name
= build_string (pty_name
);
2129 XPROCESS (process
)->tty_name
= Qnil
;
2132 /* Restore the signal state whether vfork succeeded or not.
2133 (We will signal an error, below, if it failed.) */
2134 #ifdef POSIX_SIGNALS
2135 #ifdef HAVE_WORKING_VFORK
2136 /* Restore the parent's signal handlers. */
2137 sigaction (SIGINT
, &sigint_action
, 0);
2138 sigaction (SIGQUIT
, &sigquit_action
, 0);
2140 sigaction (SIGHUP
, &sighup_action
, 0);
2142 #endif /* HAVE_WORKING_VFORK */
2143 /* Stop blocking signals in the parent. */
2144 sigprocmask (SIG_SETMASK
, &procmask
, 0);
2145 #else /* !POSIX_SIGNALS */
2149 #else /* not BSD4_1 */
2150 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
2151 sigsetmask (SIGEMPTYMASK
);
2152 #else /* ordinary USG */
2154 signal (SIGCHLD
, sigchld
);
2155 /* Now really handle any of these signals
2156 that came in during this function. */
2157 if (sigchld_deferred
)
2158 kill (getpid (), SIGCHLD
);
2160 #endif /* ordinary USG */
2161 #endif /* not BSD4_1 */
2162 #endif /* SIGCHLD */
2163 #endif /* !POSIX_SIGNALS */
2165 /* Now generate the error if vfork failed. */
2167 report_file_error ("Doing vfork", Qnil
);
2169 #endif /* not VMS */
2174 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2175 The address family of sa is not included in the result. */
2178 conv_sockaddr_to_lisp (sa
, len
)
2179 struct sockaddr
*sa
;
2182 Lisp_Object address
;
2185 register struct Lisp_Vector
*p
;
2187 switch (sa
->sa_family
)
2191 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2192 len
= sizeof (sin
->sin_addr
) + 1;
2193 address
= Fmake_vector (make_number (len
), Qnil
);
2194 p
= XVECTOR (address
);
2195 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2196 cp
= (unsigned char *)&sin
->sin_addr
;
2199 #ifdef HAVE_LOCAL_SOCKETS
2202 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2203 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2204 if (sockun
->sun_path
[i
] == 0)
2206 return make_unibyte_string (sockun
->sun_path
, i
);
2210 len
-= sizeof (sa
->sa_family
);
2211 address
= Fcons (make_number (sa
->sa_family
),
2212 Fmake_vector (make_number (len
), Qnil
));
2213 p
= XVECTOR (XCDR (address
));
2214 cp
= (unsigned char *) sa
+ sizeof (sa
->sa_family
);
2220 p
->contents
[i
++] = make_number (*cp
++);
2226 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2229 get_lisp_to_sockaddr_size (address
, familyp
)
2230 Lisp_Object address
;
2233 register struct Lisp_Vector
*p
;
2235 if (VECTORP (address
))
2237 p
= XVECTOR (address
);
2241 return sizeof (struct sockaddr_in
);
2244 #ifdef HAVE_LOCAL_SOCKETS
2245 else if (STRINGP (address
))
2247 *familyp
= AF_LOCAL
;
2248 return sizeof (struct sockaddr_un
);
2251 else if (CONSP (address
) && INTEGERP (XCAR (address
)) && VECTORP (XCDR (address
)))
2253 struct sockaddr
*sa
;
2254 *familyp
= XINT (XCAR (address
));
2255 p
= XVECTOR (XCDR (address
));
2256 return p
->size
+ sizeof (sa
->sa_family
);
2261 /* Convert an address object (vector or string) to an internal sockaddr.
2262 Format of address has already been validated by size_lisp_to_sockaddr. */
2265 conv_lisp_to_sockaddr (family
, address
, sa
, len
)
2267 Lisp_Object address
;
2268 struct sockaddr
*sa
;
2271 register struct Lisp_Vector
*p
;
2272 register unsigned char *cp
= NULL
;
2276 sa
->sa_family
= family
;
2278 if (VECTORP (address
))
2280 p
= XVECTOR (address
);
2281 if (family
== AF_INET
)
2283 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2284 len
= sizeof (sin
->sin_addr
) + 1;
2285 i
= XINT (p
->contents
[--len
]);
2286 sin
->sin_port
= htons (i
);
2287 cp
= (unsigned char *)&sin
->sin_addr
;
2290 else if (STRINGP (address
))
2292 #ifdef HAVE_LOCAL_SOCKETS
2293 if (family
== AF_LOCAL
)
2295 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2296 cp
= SDATA (address
);
2297 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2298 sockun
->sun_path
[i
] = *cp
++;
2305 p
= XVECTOR (XCDR (address
));
2306 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2309 for (i
= 0; i
< len
; i
++)
2310 if (INTEGERP (p
->contents
[i
]))
2311 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2314 #ifdef DATAGRAM_SOCKETS
2315 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2317 doc
: /* Get the current datagram address associated with PROCESS. */)
2319 Lisp_Object process
;
2323 CHECK_PROCESS (process
);
2325 if (!DATAGRAM_CONN_P (process
))
2328 channel
= XINT (XPROCESS (process
)->infd
);
2329 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2330 datagram_address
[channel
].len
);
2333 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2335 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2336 Returns nil upon error setting address, ADDRESS otherwise. */)
2338 Lisp_Object process
, address
;
2343 CHECK_PROCESS (process
);
2345 if (!DATAGRAM_CONN_P (process
))
2348 channel
= XINT (XPROCESS (process
)->infd
);
2350 len
= get_lisp_to_sockaddr_size (address
, &family
);
2351 if (datagram_address
[channel
].len
!= len
)
2353 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2359 static struct socket_options
{
2360 /* The name of this option. Should be lowercase version of option
2361 name without SO_ prefix. */
2363 /* Option level SOL_... */
2365 /* Option number SO_... */
2367 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2368 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2369 } socket_options
[] =
2371 #ifdef SO_BINDTODEVICE
2372 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2375 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2378 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2381 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2384 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2387 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2390 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2393 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2395 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2398 /* Set option OPT to value VAL on socket S.
2400 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2401 Signals an error if setting a known option fails.
2405 set_socket_option (s
, opt
, val
)
2407 Lisp_Object opt
, val
;
2410 struct socket_options
*sopt
;
2415 name
= (char *) SDATA (SYMBOL_NAME (opt
));
2416 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2417 if (strcmp (name
, sopt
->name
) == 0)
2420 switch (sopt
->opttype
)
2425 optval
= NILP (val
) ? 0 : 1;
2426 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2427 &optval
, sizeof (optval
));
2435 optval
= XINT (val
);
2437 error ("Bad option value for %s", name
);
2438 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2439 &optval
, sizeof (optval
));
2443 #ifdef SO_BINDTODEVICE
2446 char devname
[IFNAMSIZ
+1];
2448 /* This is broken, at least in the Linux 2.4 kernel.
2449 To unbind, the arg must be a zero integer, not the empty string.
2450 This should work on all systems. KFS. 2003-09-23. */
2451 bzero (devname
, sizeof devname
);
2454 char *arg
= (char *) SDATA (val
);
2455 int len
= min (strlen (arg
), IFNAMSIZ
);
2456 bcopy (arg
, devname
, len
);
2458 else if (!NILP (val
))
2459 error ("Bad option value for %s", name
);
2460 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2469 struct linger linger
;
2472 linger
.l_linger
= 0;
2474 linger
.l_linger
= XINT (val
);
2476 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2477 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2478 &linger
, sizeof (linger
));
2488 report_file_error ("Cannot set network option",
2489 Fcons (opt
, Fcons (val
, Qnil
)));
2490 return (1 << sopt
->optbit
);
2494 DEFUN ("set-network-process-option",
2495 Fset_network_process_option
, Sset_network_process_option
,
2497 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2498 See `make-network-process' for a list of options and values.
2499 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2500 OPTION is not a supported option, return nil instead; otherwise return t. */)
2501 (process
, option
, value
, no_error
)
2502 Lisp_Object process
, option
, value
;
2503 Lisp_Object no_error
;
2506 struct Lisp_Process
*p
;
2508 CHECK_PROCESS (process
);
2509 p
= XPROCESS (process
);
2510 if (!NETCONN1_P (p
))
2511 error ("Process is not a network process");
2515 error ("Process is not running");
2517 if (set_socket_option (s
, option
, value
))
2519 p
->childp
= Fplist_put (p
->childp
, option
, value
);
2523 if (NILP (no_error
))
2524 error ("Unknown or unsupported option");
2530 /* A version of request_sigio suitable for a record_unwind_protect. */
2533 unwind_request_sigio (dummy
)
2536 if (interrupt_input
)
2541 /* Create a network stream/datagram client/server process. Treated
2542 exactly like a normal process when reading and writing. Primary
2543 differences are in status display and process deletion. A network
2544 connection has no PID; you cannot signal it. All you can do is
2545 stop/continue it and deactivate/close it via delete-process */
2547 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2549 doc
: /* Create and return a network server or client process.
2551 In Emacs, network connections are represented by process objects, so
2552 input and output work as for subprocesses and `delete-process' closes
2553 a network connection. However, a network process has no process id,
2554 it cannot be signalled, and the status codes are different from normal
2557 Arguments are specified as keyword/argument pairs. The following
2558 arguments are defined:
2560 :name NAME -- NAME is name for process. It is modified if necessary
2563 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2564 with the process. Process output goes at end of that buffer, unless
2565 you specify an output stream or filter function to handle the output.
2566 BUFFER may be also nil, meaning that this process is not associated
2569 :host HOST -- HOST is name of the host to connect to, or its IP
2570 address. The symbol `local' specifies the local host. If specified
2571 for a server process, it must be a valid name or address for the local
2572 host, and only clients connecting to that address will be accepted.
2574 :service SERVICE -- SERVICE is name of the service desired, or an
2575 integer specifying a port number to connect to. If SERVICE is t,
2576 a random port number is selected for the server.
2578 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2579 stream type connection, `datagram' creates a datagram type connection.
2581 :family FAMILY -- FAMILY is the address (and protocol) family for the
2582 service specified by HOST and SERVICE. The default address family is
2583 Inet (or IPv4) for the host and port number specified by HOST and
2584 SERVICE. Other address families supported are:
2585 local -- for a local (i.e. UNIX) address specified by SERVICE.
2587 :local ADDRESS -- ADDRESS is the local address used for the connection.
2588 This parameter is ignored when opening a client process. When specified
2589 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2591 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2592 connection. This parameter is ignored when opening a stream server
2593 process. For a datagram server process, it specifies the initial
2594 setting of the remote datagram address. When specified for a client
2595 process, the FAMILY, HOST, and SERVICE args are ignored.
2597 The format of ADDRESS depends on the address family:
2598 - An IPv4 address is represented as an vector of integers [A B C D P]
2599 corresponding to numeric IP address A.B.C.D and port number P.
2600 - A local address is represented as a string with the address in the
2601 local address space.
2602 - An "unsupported family" address is represented by a cons (F . AV)
2603 where F is the family number and AV is a vector containing the socket
2604 address data with one element per address data byte. Do not rely on
2605 this format in portable code, as it may depend on implementation
2606 defined constants, data sizes, and data structure alignment.
2608 :coding CODING -- If CODING is a symbol, it specifies the coding
2609 system used for both reading and writing for this process. If CODING
2610 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2611 ENCODING is used for writing.
2613 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2614 return without waiting for the connection to complete; instead, the
2615 sentinel function will be called with second arg matching "open" (if
2616 successful) or "failed" when the connect completes. Default is to use
2617 a blocking connect (i.e. wait) for stream type connections.
2619 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2620 running when Emacs is exited.
2622 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2623 In the stopped state, a server process does not accept new
2624 connections, and a client process does not handle incoming traffic.
2625 The stopped state is cleared by `continue-process' and set by
2628 :filter FILTER -- Install FILTER as the process filter.
2630 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2631 process filter are multibyte, otherwise they are unibyte.
2632 If this keyword is not specified, the strings are multibyte iff
2633 `default-enable-multibyte-characters' is non-nil.
2635 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2637 :log LOG -- Install LOG as the server process log function. This
2638 function is called when the server accepts a network connection from a
2639 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2640 is the server process, CLIENT is the new process for the connection,
2641 and MESSAGE is a string.
2643 :plist PLIST -- Install PLIST as the new process' initial plist.
2645 :server QLEN -- if QLEN is non-nil, create a server process for the
2646 specified FAMILY, SERVICE, and connection type (stream or datagram).
2647 If QLEN is an integer, it is used as the max. length of the server's
2648 pending connection queue (also known as the backlog); the default
2649 queue length is 5. Default is to create a client process.
2651 The following network options can be specified for this connection:
2653 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2654 :dontroute BOOL -- Only send to directly connected hosts.
2655 :keepalive BOOL -- Send keep-alive messages on network stream.
2656 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2657 :oobinline BOOL -- Place out-of-band data in receive data stream.
2658 :priority INT -- Set protocol defined priority for sent packets.
2659 :reuseaddr BOOL -- Allow reusing a recently used local address
2660 (this is allowed by default for a server process).
2661 :bindtodevice NAME -- bind to interface NAME. Using this may require
2662 special privileges on some systems.
2664 Consult the relevant system programmer's manual pages for more
2665 information on using these options.
2668 A server process will listen for and accept connections from clients.
2669 When a client connection is accepted, a new network process is created
2670 for the connection with the following parameters:
2672 - The client's process name is constructed by concatenating the server
2673 process' NAME and a client identification string.
2674 - If the FILTER argument is non-nil, the client process will not get a
2675 separate process buffer; otherwise, the client's process buffer is a newly
2676 created buffer named after the server process' BUFFER name or process
2677 NAME concatenated with the client identification string.
2678 - The connection type and the process filter and sentinel parameters are
2679 inherited from the server process' TYPE, FILTER and SENTINEL.
2680 - The client process' contact info is set according to the client's
2681 addressing information (typically an IP address and a port number).
2682 - The client process' plist is initialized from the server's plist.
2684 Notice that the FILTER and SENTINEL args are never used directly by
2685 the server process. Also, the BUFFER argument is not used directly by
2686 the server process, but via the optional :log function, accepted (and
2687 failed) connections may be logged in the server process' buffer.
2689 The original argument list, modified with the actual connection
2690 information, is available via the `process-contact' function.
2692 usage: (make-network-process &rest ARGS) */)
2698 Lisp_Object contact
;
2699 struct Lisp_Process
*p
;
2700 #ifdef HAVE_GETADDRINFO
2701 struct addrinfo ai
, *res
, *lres
;
2702 struct addrinfo hints
;
2703 char *portstring
, portbuf
[128];
2704 #else /* HAVE_GETADDRINFO */
2705 struct _emacs_addrinfo
2711 struct sockaddr
*ai_addr
;
2712 struct _emacs_addrinfo
*ai_next
;
2714 #endif /* HAVE_GETADDRINFO */
2715 struct sockaddr_in address_in
;
2716 #ifdef HAVE_LOCAL_SOCKETS
2717 struct sockaddr_un address_un
;
2722 int s
= -1, outch
, inch
;
2723 struct gcpro gcpro1
;
2724 int count
= SPECPDL_INDEX ();
2726 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2728 Lisp_Object name
, buffer
, host
, service
, address
;
2729 Lisp_Object filter
, sentinel
;
2730 int is_non_blocking_client
= 0;
2731 int is_server
= 0, backlog
= 5;
2738 /* Save arguments for process-contact and clone-process. */
2739 contact
= Flist (nargs
, args
);
2743 /* Ensure socket support is loaded if available. */
2744 init_winsock (TRUE
);
2747 /* :type TYPE (nil: stream, datagram */
2748 tem
= Fplist_get (contact
, QCtype
);
2750 socktype
= SOCK_STREAM
;
2751 #ifdef DATAGRAM_SOCKETS
2752 else if (EQ (tem
, Qdatagram
))
2753 socktype
= SOCK_DGRAM
;
2756 error ("Unsupported connection type");
2759 tem
= Fplist_get (contact
, QCserver
);
2762 /* Don't support network sockets when non-blocking mode is
2763 not available, since a blocked Emacs is not useful. */
2764 #if defined(TERM) || (!defined(O_NONBLOCK) && !defined(O_NDELAY))
2765 error ("Network servers not supported");
2769 backlog
= XINT (tem
);
2773 /* Make QCaddress an alias for :local (server) or :remote (client). */
2774 QCaddress
= is_server
? QClocal
: QCremote
;
2777 if (!is_server
&& socktype
== SOCK_STREAM
2778 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2780 #ifndef NON_BLOCKING_CONNECT
2781 error ("Non-blocking connect not supported");
2783 is_non_blocking_client
= 1;
2787 name
= Fplist_get (contact
, QCname
);
2788 buffer
= Fplist_get (contact
, QCbuffer
);
2789 filter
= Fplist_get (contact
, QCfilter
);
2790 sentinel
= Fplist_get (contact
, QCsentinel
);
2792 CHECK_STRING (name
);
2795 /* Let's handle TERM before things get complicated ... */
2796 host
= Fplist_get (contact
, QChost
);
2797 CHECK_STRING (host
);
2799 service
= Fplist_get (contact
, QCservice
);
2800 if (INTEGERP (service
))
2801 port
= htons ((unsigned short) XINT (service
));
2804 struct servent
*svc_info
;
2805 CHECK_STRING (service
);
2806 svc_info
= getservbyname (SDATA (service
), "tcp");
2808 error ("Unknown service: %s", SDATA (service
));
2809 port
= svc_info
->s_port
;
2812 s
= connect_server (0);
2814 report_file_error ("error creating socket", Fcons (name
, Qnil
));
2815 send_command (s
, C_PORT
, 0, "%s:%d", SDATA (host
), ntohs (port
));
2816 send_command (s
, C_DUMB
, 1, 0);
2818 #else /* not TERM */
2820 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2821 ai
.ai_socktype
= socktype
;
2826 /* :local ADDRESS or :remote ADDRESS */
2827 address
= Fplist_get (contact
, QCaddress
);
2828 if (!NILP (address
))
2830 host
= service
= Qnil
;
2832 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
2833 error ("Malformed :address");
2834 ai
.ai_family
= family
;
2835 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
2836 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
2840 /* :family FAMILY -- nil (for Inet), local, or integer. */
2841 tem
= Fplist_get (contact
, QCfamily
);
2843 family
= XINT (tem
);
2848 #ifdef HAVE_LOCAL_SOCKETS
2849 else if (EQ (tem
, Qlocal
))
2854 error ("Unknown address family");
2855 ai
.ai_family
= family
;
2857 /* :service SERVICE -- string, integer (port number), or t (random port). */
2858 service
= Fplist_get (contact
, QCservice
);
2860 #ifdef HAVE_LOCAL_SOCKETS
2861 if (family
== AF_LOCAL
)
2863 /* Host is not used. */
2865 CHECK_STRING (service
);
2866 bzero (&address_un
, sizeof address_un
);
2867 address_un
.sun_family
= AF_LOCAL
;
2868 strncpy (address_un
.sun_path
, SDATA (service
), sizeof address_un
.sun_path
);
2869 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
2870 ai
.ai_addrlen
= sizeof address_un
;
2875 /* :host HOST -- hostname, ip address, or 'local for localhost. */
2876 host
= Fplist_get (contact
, QChost
);
2879 if (EQ (host
, Qlocal
))
2880 host
= build_string ("localhost");
2881 CHECK_STRING (host
);
2884 /* Slow down polling to every ten seconds.
2885 Some kernels have a bug which causes retrying connect to fail
2886 after a connect. Polling can interfere with gethostbyname too. */
2887 #ifdef POLL_FOR_INPUT
2888 if (socktype
== SOCK_STREAM
)
2890 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
2891 bind_polling_period (10);
2895 #ifdef HAVE_GETADDRINFO
2896 /* If we have a host, use getaddrinfo to resolve both host and service.
2897 Otherwise, use getservbyname to lookup the service. */
2901 /* SERVICE can either be a string or int.
2902 Convert to a C string for later use by getaddrinfo. */
2903 if (EQ (service
, Qt
))
2905 else if (INTEGERP (service
))
2907 sprintf (portbuf
, "%ld", (long) XINT (service
));
2908 portstring
= portbuf
;
2912 CHECK_STRING (service
);
2913 portstring
= SDATA (service
);
2918 memset (&hints
, 0, sizeof (hints
));
2920 hints
.ai_family
= NILP (Fplist_member (contact
, QCfamily
)) ? AF_UNSPEC
: family
;
2921 hints
.ai_socktype
= socktype
;
2922 hints
.ai_protocol
= 0;
2923 ret
= getaddrinfo (SDATA (host
), portstring
, &hints
, &res
);
2925 #ifdef HAVE_GAI_STRERROR
2926 error ("%s/%s %s", SDATA (host
), portstring
, gai_strerror(ret
));
2928 error ("%s/%s getaddrinfo error %d", SDATA (host
), portstring
, ret
);
2934 #endif /* HAVE_GETADDRINFO */
2936 /* We end up here if getaddrinfo is not defined, or in case no hostname
2937 has been specified (e.g. for a local server process). */
2939 if (EQ (service
, Qt
))
2941 else if (INTEGERP (service
))
2942 port
= htons ((unsigned short) XINT (service
));
2945 struct servent
*svc_info
;
2946 CHECK_STRING (service
);
2947 svc_info
= getservbyname (SDATA (service
),
2948 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
2950 error ("Unknown service: %s", SDATA (service
));
2951 port
= svc_info
->s_port
;
2954 bzero (&address_in
, sizeof address_in
);
2955 address_in
.sin_family
= family
;
2956 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
2957 address_in
.sin_port
= port
;
2959 #ifndef HAVE_GETADDRINFO
2962 struct hostent
*host_info_ptr
;
2964 /* gethostbyname may fail with TRY_AGAIN, but we don't honour that,
2965 as it may `hang' Emacs for a very long time. */
2968 host_info_ptr
= gethostbyname (SDATA (host
));
2973 bcopy (host_info_ptr
->h_addr
, (char *) &address_in
.sin_addr
,
2974 host_info_ptr
->h_length
);
2975 family
= host_info_ptr
->h_addrtype
;
2976 address_in
.sin_family
= family
;
2979 /* Attempt to interpret host as numeric inet address */
2981 IN_ADDR numeric_addr
;
2982 numeric_addr
= inet_addr ((char *) SDATA (host
));
2983 if (NUMERIC_ADDR_ERROR
)
2984 error ("Unknown host \"%s\"", SDATA (host
));
2986 bcopy ((char *)&numeric_addr
, (char *) &address_in
.sin_addr
,
2987 sizeof (address_in
.sin_addr
));
2991 #endif /* not HAVE_GETADDRINFO */
2993 ai
.ai_family
= family
;
2994 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
2995 ai
.ai_addrlen
= sizeof address_in
;
2999 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
3000 when connect is interrupted. So let's not let it get interrupted.
3001 Note we do not turn off polling, because polling is only used
3002 when not interrupt_input, and thus not normally used on the systems
3003 which have this bug. On systems which use polling, there's no way
3004 to quit if polling is turned off. */
3006 && !is_server
&& socktype
== SOCK_STREAM
)
3008 /* Comment from KFS: The original open-network-stream code
3009 didn't unwind protect this, but it seems like the proper
3010 thing to do. In any case, I don't see how it could harm to
3011 do this -- and it makes cleanup (using unbind_to) easier. */
3012 record_unwind_protect (unwind_request_sigio
, Qnil
);
3016 /* Do this in case we never enter the for-loop below. */
3017 count1
= SPECPDL_INDEX ();
3020 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3026 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3033 #ifdef DATAGRAM_SOCKETS
3034 if (!is_server
&& socktype
== SOCK_DGRAM
)
3036 #endif /* DATAGRAM_SOCKETS */
3038 #ifdef NON_BLOCKING_CONNECT
3039 if (is_non_blocking_client
)
3042 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3044 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3056 /* Make us close S if quit. */
3057 record_unwind_protect (close_file_unwind
, make_number (s
));
3059 /* Parse network options in the arg list.
3060 We simply ignore anything which isn't a known option (including other keywords).
3061 An error is signalled if setting a known option fails. */
3062 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3063 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3067 /* Configure as a server socket. */
3069 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3070 explicit :reuseaddr key to override this. */
3071 #ifdef HAVE_LOCAL_SOCKETS
3072 if (family
!= AF_LOCAL
)
3074 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3077 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3078 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3081 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3082 report_file_error ("Cannot bind server socket", Qnil
);
3084 #ifdef HAVE_GETSOCKNAME
3085 if (EQ (service
, Qt
))
3087 struct sockaddr_in sa1
;
3088 int len1
= sizeof (sa1
);
3089 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3091 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3092 service
= make_number (ntohs (sa1
.sin_port
));
3093 contact
= Fplist_put (contact
, QCservice
, service
);
3098 if (socktype
== SOCK_STREAM
&& listen (s
, backlog
))
3099 report_file_error ("Cannot listen on server socket", Qnil
);
3107 /* This turns off all alarm-based interrupts; the
3108 bind_polling_period call above doesn't always turn all the
3109 short-interval ones off, especially if interrupt_input is
3112 It'd be nice to be able to control the connect timeout
3113 though. Would non-blocking connect calls be portable?
3115 This used to be conditioned by HAVE_GETADDRINFO. Why? */
3117 turn_on_atimers (0);
3119 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3122 turn_on_atimers (1);
3124 if (ret
== 0 || xerrno
== EISCONN
)
3126 /* The unwind-protect will be discarded afterwards.
3127 Likewise for immediate_quit. */
3131 #ifdef NON_BLOCKING_CONNECT
3133 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3137 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3145 /* Discard the unwind protect closing S. */
3146 specpdl_ptr
= specpdl
+ count1
;
3150 if (xerrno
== EINTR
)
3156 #ifdef DATAGRAM_SOCKETS
3157 if (socktype
== SOCK_DGRAM
)
3159 if (datagram_address
[s
].sa
)
3161 datagram_address
[s
].sa
= (struct sockaddr
*) xmalloc (lres
->ai_addrlen
);
3162 datagram_address
[s
].len
= lres
->ai_addrlen
;
3166 bzero (datagram_address
[s
].sa
, lres
->ai_addrlen
);
3167 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3170 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3171 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3172 conv_lisp_to_sockaddr (rfamily
, remote
,
3173 datagram_address
[s
].sa
, rlen
);
3177 bcopy (lres
->ai_addr
, datagram_address
[s
].sa
, lres
->ai_addrlen
);
3180 contact
= Fplist_put (contact
, QCaddress
,
3181 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3182 #ifdef HAVE_GETSOCKNAME
3185 struct sockaddr_in sa1
;
3186 int len1
= sizeof (sa1
);
3187 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3188 contact
= Fplist_put (contact
, QClocal
,
3189 conv_sockaddr_to_lisp (&sa1
, len1
));
3194 #ifdef HAVE_GETADDRINFO
3201 /* Discard the unwind protect for closing S, if any. */
3202 specpdl_ptr
= specpdl
+ count1
;
3204 /* Unwind bind_polling_period and request_sigio. */
3205 unbind_to (count
, Qnil
);
3209 /* If non-blocking got this far - and failed - assume non-blocking is
3210 not supported after all. This is probably a wrong assumption, but
3211 the normal blocking calls to open-network-stream handles this error
3213 if (is_non_blocking_client
)
3218 report_file_error ("make server process failed", contact
);
3220 report_file_error ("make client process failed", contact
);
3223 #endif /* not TERM */
3229 buffer
= Fget_buffer_create (buffer
);
3230 proc
= make_process (name
);
3232 chan_process
[inch
] = proc
;
3235 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3238 fcntl (inch
, F_SETFL
, O_NDELAY
);
3242 p
= XPROCESS (proc
);
3244 p
->childp
= contact
;
3245 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
3248 p
->sentinel
= sentinel
;
3250 p
->filter_multibyte
= buffer_defaults
.enable_multibyte_characters
;
3251 /* Override the above only if :filter-multibyte is specified. */
3252 if (! NILP (Fplist_member (contact
, QCfilter_multibyte
)))
3253 p
->filter_multibyte
= Fplist_get (contact
, QCfilter_multibyte
);
3254 p
->log
= Fplist_get (contact
, QClog
);
3255 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3256 p
->kill_without_query
= Qt
;
3257 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3260 XSETINT (p
->infd
, inch
);
3261 XSETINT (p
->outfd
, outch
);
3262 if (is_server
&& socktype
== SOCK_STREAM
)
3263 p
->status
= Qlisten
;
3265 #ifdef NON_BLOCKING_CONNECT
3266 if (is_non_blocking_client
)
3268 /* We may get here if connect did succeed immediately. However,
3269 in that case, we still need to signal this like a non-blocking
3271 p
->status
= Qconnect
;
3272 if (!FD_ISSET (inch
, &connect_wait_mask
))
3274 FD_SET (inch
, &connect_wait_mask
);
3275 num_pending_connects
++;
3280 /* A server may have a client filter setting of Qt, but it must
3281 still listen for incoming connects unless it is stopped. */
3282 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3283 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3285 FD_SET (inch
, &input_wait_mask
);
3286 FD_SET (inch
, &non_keyboard_wait_mask
);
3289 if (inch
> max_process_desc
)
3290 max_process_desc
= inch
;
3292 tem
= Fplist_member (contact
, QCcoding
);
3293 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3294 tem
= Qnil
; /* No error message (too late!). */
3297 /* Setup coding systems for communicating with the network stream. */
3298 struct gcpro gcpro1
;
3299 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3300 Lisp_Object coding_systems
= Qt
;
3301 Lisp_Object args
[5], val
;
3305 val
= XCAR (XCDR (tem
));
3309 else if (!NILP (Vcoding_system_for_read
))
3310 val
= Vcoding_system_for_read
;
3311 else if ((!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
))
3312 || (NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
)))
3313 /* We dare not decode end-of-line format by setting VAL to
3314 Qraw_text, because the existing Emacs Lisp libraries
3315 assume that they receive bare code including a sequene of
3320 if (NILP (host
) || NILP (service
))
3321 coding_systems
= Qnil
;
3324 args
[0] = Qopen_network_stream
, args
[1] = name
,
3325 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3327 coding_systems
= Ffind_operation_coding_system (5, args
);
3330 if (CONSP (coding_systems
))
3331 val
= XCAR (coding_systems
);
3332 else if (CONSP (Vdefault_process_coding_system
))
3333 val
= XCAR (Vdefault_process_coding_system
);
3337 p
->decode_coding_system
= val
;
3341 val
= XCAR (XCDR (tem
));
3345 else if (!NILP (Vcoding_system_for_write
))
3346 val
= Vcoding_system_for_write
;
3347 else if (NILP (current_buffer
->enable_multibyte_characters
))
3351 if (EQ (coding_systems
, Qt
))
3353 if (NILP (host
) || NILP (service
))
3354 coding_systems
= Qnil
;
3357 args
[0] = Qopen_network_stream
, args
[1] = name
,
3358 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3360 coding_systems
= Ffind_operation_coding_system (5, args
);
3364 if (CONSP (coding_systems
))
3365 val
= XCDR (coding_systems
);
3366 else if (CONSP (Vdefault_process_coding_system
))
3367 val
= XCDR (Vdefault_process_coding_system
);
3371 p
->encode_coding_system
= val
;
3373 setup_process_coding_systems (proc
);
3375 p
->decoding_buf
= make_uninit_string (0);
3376 p
->decoding_carryover
= make_number (0);
3377 p
->encoding_buf
= make_uninit_string (0);
3378 p
->encoding_carryover
= make_number (0);
3380 p
->inherit_coding_system_flag
3381 = (!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
3387 #endif /* HAVE_SOCKETS */
3390 #if defined(HAVE_SOCKETS) && defined(HAVE_NET_IF_H) && defined(HAVE_SYS_IOCTL_H)
3393 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3394 doc
: /* Return an alist of all network interfaces and their network address.
3395 Each element is a cons, the car of which is a string containing the
3396 interface name, and the cdr is the network address in internal
3397 format; see the description of ADDRESS in `make-network-process'. */)
3400 struct ifconf ifconf
;
3401 struct ifreq
*ifreqs
= NULL
;
3406 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3412 buf_size
= ifaces
* sizeof(ifreqs
[0]);
3413 ifreqs
= (struct ifreq
*)xrealloc(ifreqs
, buf_size
);
3420 ifconf
.ifc_len
= buf_size
;
3421 ifconf
.ifc_req
= ifreqs
;
3422 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3428 if (ifconf
.ifc_len
== buf_size
)
3432 ifaces
= ifconf
.ifc_len
/ sizeof (ifreqs
[0]);
3435 while (--ifaces
>= 0)
3437 struct ifreq
*ifq
= &ifreqs
[ifaces
];
3438 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3439 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3441 bcopy (ifq
->ifr_name
, namebuf
, sizeof (ifq
->ifr_name
));
3442 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3443 res
= Fcons (Fcons (build_string (namebuf
),
3444 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3445 sizeof (struct sockaddr
))),
3451 #endif /* SIOCGIFCONF */
3453 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
3460 static struct ifflag_def ifflag_table
[] = {
3464 #ifdef IFF_BROADCAST
3465 { IFF_BROADCAST
, "broadcast" },
3468 { IFF_DEBUG
, "debug" },
3471 { IFF_LOOPBACK
, "loopback" },
3473 #ifdef IFF_POINTOPOINT
3474 { IFF_POINTOPOINT
, "pointopoint" },
3477 { IFF_RUNNING
, "running" },
3480 { IFF_NOARP
, "noarp" },
3483 { IFF_PROMISC
, "promisc" },
3485 #ifdef IFF_NOTRAILERS
3486 { IFF_NOTRAILERS
, "notrailers" },
3489 { IFF_ALLMULTI
, "allmulti" },
3492 { IFF_MASTER
, "master" },
3495 { IFF_SLAVE
, "slave" },
3497 #ifdef IFF_MULTICAST
3498 { IFF_MULTICAST
, "multicast" },
3501 { IFF_PORTSEL
, "portsel" },
3503 #ifdef IFF_AUTOMEDIA
3504 { IFF_AUTOMEDIA
, "automedia" },
3507 { IFF_DYNAMIC
, "dynamic" },
3512 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3513 doc
: /* Return information about network interface named IFNAME.
3514 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3515 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3516 NETMASK is the layer 3 network mask, HWADDR is the layer 2 addres, and
3517 FLAGS is the current flags of the interface. */)
3522 Lisp_Object res
= Qnil
;
3527 CHECK_STRING (ifname
);
3529 bzero (rq
.ifr_name
, sizeof rq
.ifr_name
);
3530 strncpy (rq
.ifr_name
, SDATA (ifname
), sizeof (rq
.ifr_name
));
3532 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3537 #if defined(SIOCGIFFLAGS) && defined(HAVE_STRUCT_IFREQ_IFR_FLAGS)
3538 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3540 int flags
= rq
.ifr_flags
;
3541 struct ifflag_def
*fp
;
3545 for (fp
= ifflag_table
; flags
!= 0 && fp
; fp
++)
3547 if (flags
& fp
->flag_bit
)
3549 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3550 flags
-= fp
->flag_bit
;
3553 for (fnum
= 0; flags
&& fnum
< 32; fnum
++)
3555 if (flags
& (1 << fnum
))
3557 elt
= Fcons (make_number (fnum
), elt
);
3562 res
= Fcons (elt
, res
);
3565 #if defined(SIOCGIFHWADDR) && defined(HAVE_STRUCT_IFREQ_IFR_HWADDR)
3566 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3568 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3569 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3573 for (n
= 0; n
< 6; n
++)
3574 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3575 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3578 res
= Fcons (elt
, res
);
3581 #if defined(SIOCGIFNETMASK) && defined(ifr_netmask)
3582 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3585 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3588 res
= Fcons (elt
, res
);
3591 #if defined(SIOCGIFBRDADDR) && defined(HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3592 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3595 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3598 res
= Fcons (elt
, res
);
3601 #if defined(SIOCGIFADDR) && defined(HAVE_STRUCT_IFREQ_IFR_ADDR)
3602 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3605 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3608 res
= Fcons (elt
, res
);
3612 return any
? res
: Qnil
;
3615 #endif /* HAVE_SOCKETS */
3617 /* Turn off input and output for process PROC. */
3620 deactivate_process (proc
)
3623 register int inchannel
, outchannel
;
3624 register struct Lisp_Process
*p
= XPROCESS (proc
);
3626 inchannel
= XINT (p
->infd
);
3627 outchannel
= XINT (p
->outfd
);
3629 #ifdef ADAPTIVE_READ_BUFFERING
3630 if (XINT (p
->read_output_delay
) > 0)
3632 if (--process_output_delay_count
< 0)
3633 process_output_delay_count
= 0;
3634 XSETINT (p
->read_output_delay
, 0);
3635 p
->read_output_skip
= Qnil
;
3641 /* Beware SIGCHLD hereabouts. */
3642 flush_pending_output (inchannel
);
3645 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
3646 sys$
dassgn (outchannel
);
3647 vs
= get_vms_process_pointer (p
->pid
);
3649 give_back_vms_process_stuff (vs
);
3652 emacs_close (inchannel
);
3653 if (outchannel
>= 0 && outchannel
!= inchannel
)
3654 emacs_close (outchannel
);
3657 XSETINT (p
->infd
, -1);
3658 XSETINT (p
->outfd
, -1);
3659 #ifdef DATAGRAM_SOCKETS
3660 if (DATAGRAM_CHAN_P (inchannel
))
3662 xfree (datagram_address
[inchannel
].sa
);
3663 datagram_address
[inchannel
].sa
= 0;
3664 datagram_address
[inchannel
].len
= 0;
3667 chan_process
[inchannel
] = Qnil
;
3668 FD_CLR (inchannel
, &input_wait_mask
);
3669 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3670 #ifdef NON_BLOCKING_CONNECT
3671 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3673 FD_CLR (inchannel
, &connect_wait_mask
);
3674 if (--num_pending_connects
< 0)
3678 if (inchannel
== max_process_desc
)
3681 /* We just closed the highest-numbered process input descriptor,
3682 so recompute the highest-numbered one now. */
3683 max_process_desc
= 0;
3684 for (i
= 0; i
< MAXDESC
; i
++)
3685 if (!NILP (chan_process
[i
]))
3686 max_process_desc
= i
;
3691 /* Close all descriptors currently in use for communication
3692 with subprocess. This is used in a newly-forked subprocess
3693 to get rid of irrelevant descriptors. */
3696 close_process_descs ()
3700 for (i
= 0; i
< MAXDESC
; i
++)
3702 Lisp_Object process
;
3703 process
= chan_process
[i
];
3704 if (!NILP (process
))
3706 int in
= XINT (XPROCESS (process
)->infd
);
3707 int out
= XINT (XPROCESS (process
)->outfd
);
3710 if (out
>= 0 && in
!= out
)
3717 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3719 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3720 It is read into the process' buffers or given to their filter functions.
3721 Non-nil arg PROCESS means do not return until some output has been received
3723 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of
3724 seconds and microseconds to wait; return after that much time whether
3725 or not there is input.
3726 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
3727 from PROCESS, suspending reading output from other processes.
3728 If JUST-THIS-ONE is an integer, don't run any timers either.
3729 Return non-nil iff we received any output before the timeout expired. */)
3730 (process
, timeout
, timeout_msecs
, just_this_one
)
3731 register Lisp_Object process
, timeout
, timeout_msecs
, just_this_one
;
3736 if (! NILP (process
))
3737 CHECK_PROCESS (process
);
3739 just_this_one
= Qnil
;
3741 if (! NILP (timeout_msecs
))
3743 CHECK_NUMBER (timeout_msecs
);
3744 useconds
= XINT (timeout_msecs
);
3745 if (!INTEGERP (timeout
))
3746 XSETINT (timeout
, 0);
3749 int carry
= useconds
/ 1000000;
3751 XSETINT (timeout
, XINT (timeout
) + carry
);
3752 useconds
-= carry
* 1000000;
3754 /* I think this clause is necessary because C doesn't
3755 guarantee a particular rounding direction for negative
3759 XSETINT (timeout
, XINT (timeout
) - 1);
3760 useconds
+= 1000000;
3767 if (! NILP (timeout
))
3769 CHECK_NUMBER (timeout
);
3770 seconds
= XINT (timeout
);
3771 if (seconds
< 0 || (seconds
== 0 && useconds
== 0))
3775 seconds
= NILP (process
) ? -1 : 0;
3778 (wait_reading_process_output (seconds
, useconds
, 0, 0,
3780 !NILP (process
) ? XPROCESS (process
) : NULL
,
3781 NILP (just_this_one
) ? 0 :
3782 !INTEGERP (just_this_one
) ? 1 : -1)
3786 /* Accept a connection for server process SERVER on CHANNEL. */
3788 static int connect_counter
= 0;
3791 server_accept_connection (server
, channel
)
3795 Lisp_Object proc
, caller
, name
, buffer
;
3796 Lisp_Object contact
, host
, service
;
3797 struct Lisp_Process
*ps
= XPROCESS (server
);
3798 struct Lisp_Process
*p
;
3802 struct sockaddr_in in
;
3803 #ifdef HAVE_LOCAL_SOCKETS
3804 struct sockaddr_un un
;
3807 int len
= sizeof saddr
;
3809 s
= accept (channel
, &saddr
.sa
, &len
);
3818 if (code
== EWOULDBLOCK
)
3822 if (!NILP (ps
->log
))
3823 call3 (ps
->log
, server
, Qnil
,
3824 concat3 (build_string ("accept failed with code"),
3825 Fnumber_to_string (make_number (code
)),
3826 build_string ("\n")));
3832 /* Setup a new process to handle the connection. */
3834 /* Generate a unique identification of the caller, and build contact
3835 information for this process. */
3838 switch (saddr
.sa
.sa_family
)
3842 Lisp_Object args
[5];
3843 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
3844 args
[0] = build_string ("%d.%d.%d.%d");
3845 args
[1] = make_number (*ip
++);
3846 args
[2] = make_number (*ip
++);
3847 args
[3] = make_number (*ip
++);
3848 args
[4] = make_number (*ip
++);
3849 host
= Fformat (5, args
);
3850 service
= make_number (ntohs (saddr
.in
.sin_port
));
3852 args
[0] = build_string (" <%s:%d>");
3855 caller
= Fformat (3, args
);
3859 #ifdef HAVE_LOCAL_SOCKETS
3863 caller
= Fnumber_to_string (make_number (connect_counter
));
3864 caller
= concat3 (build_string (" <*"), caller
, build_string ("*>"));
3868 /* Create a new buffer name for this process if it doesn't have a
3869 filter. The new buffer name is based on the buffer name or
3870 process name of the server process concatenated with the caller
3873 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
3877 buffer
= ps
->buffer
;
3879 buffer
= Fbuffer_name (buffer
);
3884 buffer
= concat2 (buffer
, caller
);
3885 buffer
= Fget_buffer_create (buffer
);
3889 /* Generate a unique name for the new server process. Combine the
3890 server process name with the caller identification. */
3892 name
= concat2 (ps
->name
, caller
);
3893 proc
= make_process (name
);
3895 chan_process
[s
] = proc
;
3898 fcntl (s
, F_SETFL
, O_NONBLOCK
);
3901 fcntl (s
, F_SETFL
, O_NDELAY
);
3905 p
= XPROCESS (proc
);
3907 /* Build new contact information for this setup. */
3908 contact
= Fcopy_sequence (ps
->childp
);
3909 contact
= Fplist_put (contact
, QCserver
, Qnil
);
3910 contact
= Fplist_put (contact
, QChost
, host
);
3911 if (!NILP (service
))
3912 contact
= Fplist_put (contact
, QCservice
, service
);
3913 contact
= Fplist_put (contact
, QCremote
,
3914 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
3915 #ifdef HAVE_GETSOCKNAME
3917 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
3918 contact
= Fplist_put (contact
, QClocal
,
3919 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
3922 p
->childp
= contact
;
3923 p
->plist
= Fcopy_sequence (ps
->plist
);
3926 p
->sentinel
= ps
->sentinel
;
3927 p
->filter
= ps
->filter
;
3930 XSETINT (p
->infd
, s
);
3931 XSETINT (p
->outfd
, s
);
3934 /* Client processes for accepted connections are not stopped initially. */
3935 if (!EQ (p
->filter
, Qt
))
3937 FD_SET (s
, &input_wait_mask
);
3938 FD_SET (s
, &non_keyboard_wait_mask
);
3941 if (s
> max_process_desc
)
3942 max_process_desc
= s
;
3944 /* Setup coding system for new process based on server process.
3945 This seems to be the proper thing to do, as the coding system
3946 of the new process should reflect the settings at the time the
3947 server socket was opened; not the current settings. */
3949 p
->decode_coding_system
= ps
->decode_coding_system
;
3950 p
->encode_coding_system
= ps
->encode_coding_system
;
3951 setup_process_coding_systems (proc
);
3953 p
->decoding_buf
= make_uninit_string (0);
3954 p
->decoding_carryover
= make_number (0);
3955 p
->encoding_buf
= make_uninit_string (0);
3956 p
->encoding_carryover
= make_number (0);
3958 p
->inherit_coding_system_flag
3959 = (NILP (buffer
) ? Qnil
: ps
->inherit_coding_system_flag
);
3961 if (!NILP (ps
->log
))
3962 call3 (ps
->log
, server
, proc
,
3963 concat3 (build_string ("accept from "),
3964 (STRINGP (host
) ? host
: build_string ("-")),
3965 build_string ("\n")));
3967 if (!NILP (p
->sentinel
))
3968 exec_sentinel (proc
,
3969 concat3 (build_string ("open from "),
3970 (STRINGP (host
) ? host
: build_string ("-")),
3971 build_string ("\n")));
3974 /* This variable is different from waiting_for_input in keyboard.c.
3975 It is used to communicate to a lisp process-filter/sentinel (via the
3976 function Fwaiting_for_user_input_p below) whether Emacs was waiting
3977 for user-input when that process-filter was called.
3978 waiting_for_input cannot be used as that is by definition 0 when
3979 lisp code is being evalled.
3980 This is also used in record_asynch_buffer_change.
3981 For that purpose, this must be 0
3982 when not inside wait_reading_process_output. */
3983 static int waiting_for_user_input_p
;
3985 /* This is here so breakpoints can be put on it. */
3987 wait_reading_process_output_1 ()
3991 /* Read and dispose of subprocess output while waiting for timeout to
3992 elapse and/or keyboard input to be available.
3995 timeout in seconds, or
3996 zero for no limit, or
3997 -1 means gobble data immediately available but don't wait for any.
4000 an additional duration to wait, measured in microseconds.
4001 If this is nonzero and time_limit is 0, then the timeout
4002 consists of MICROSECS only.
4004 READ_KBD is a lisp value:
4005 0 to ignore keyboard input, or
4006 1 to return when input is available, or
4007 -1 meaning caller will actually read the input, so don't throw to
4008 the quit handler, or
4010 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4011 output that arrives.
4013 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4014 (and gobble terminal input into the buffer if any arrives).
4016 If WAIT_PROC is specified, wait until something arrives from that
4017 process. The return value is true iff we read some input from
4020 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4021 (suspending output from other processes). A negative value
4022 means don't run any timers either.
4024 If WAIT_PROC is specified, then the function returns true iff we
4025 received input from that process before the timeout elapsed.
4026 Otherwise, return true iff we received input from any process. */
4029 wait_reading_process_output (time_limit
, microsecs
, read_kbd
, do_display
,
4030 wait_for_cell
, wait_proc
, just_wait_proc
)
4031 int time_limit
, microsecs
, read_kbd
, do_display
;
4032 Lisp_Object wait_for_cell
;
4033 struct Lisp_Process
*wait_proc
;
4036 register int channel
, nfds
;
4037 SELECT_TYPE Available
;
4038 #ifdef NON_BLOCKING_CONNECT
4039 SELECT_TYPE Connecting
;
4042 int check_delay
, no_avail
;
4045 EMACS_TIME timeout
, end_time
;
4046 int wait_channel
= -1;
4047 int got_some_input
= 0;
4048 /* Either nil or a cons cell, the car of which is of interest and
4049 may be changed outside of this routine. */
4050 int saved_waiting_for_user_input_p
= waiting_for_user_input_p
;
4052 FD_ZERO (&Available
);
4053 #ifdef NON_BLOCKING_CONNECT
4054 FD_ZERO (&Connecting
);
4057 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4058 if (wait_proc
!= NULL
)
4059 wait_channel
= XINT (wait_proc
->infd
);
4061 waiting_for_user_input_p
= read_kbd
;
4063 /* Since we may need to wait several times,
4064 compute the absolute time to return at. */
4065 if (time_limit
|| microsecs
)
4067 EMACS_GET_TIME (end_time
);
4068 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4069 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4071 #ifdef POLL_INTERRUPTED_SYS_CALL
4072 /* AlainF 5-Jul-1996
4073 HP-UX 10.10 seem to have problems with signals coming in
4074 Causes "poll: interrupted system call" messages when Emacs is run
4076 Turn off periodic alarms (in case they are in use),
4077 and then turn off any other atimers. */
4079 turn_on_atimers (0);
4080 #endif /* POLL_INTERRUPTED_SYS_CALL */
4084 int timeout_reduced_for_timers
= 0;
4086 /* If calling from keyboard input, do not quit
4087 since we want to return C-g as an input character.
4088 Otherwise, do pending quit if requested. */
4092 else if (interrupt_input_pending
)
4093 handle_async_input ();
4096 /* Exit now if the cell we're waiting for became non-nil. */
4097 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4100 /* Compute time from now till when time limit is up */
4101 /* Exit if already run out */
4102 if (time_limit
== -1)
4104 /* -1 specified for timeout means
4105 gobble output available now
4106 but don't wait at all. */
4108 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4110 else if (time_limit
|| microsecs
)
4112 EMACS_GET_TIME (timeout
);
4113 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4114 if (EMACS_TIME_NEG_P (timeout
))
4119 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4122 /* Normally we run timers here.
4123 But not if wait_for_cell; in those cases,
4124 the wait is supposed to be short,
4125 and those callers cannot handle running arbitrary Lisp code here. */
4126 if (NILP (wait_for_cell
)
4127 && just_wait_proc
>= 0)
4129 EMACS_TIME timer_delay
;
4133 int old_timers_run
= timers_run
;
4134 struct buffer
*old_buffer
= current_buffer
;
4136 timer_delay
= timer_check (1);
4138 /* If a timer has run, this might have changed buffers
4139 an alike. Make read_key_sequence aware of that. */
4140 if (timers_run
!= old_timers_run
4141 && old_buffer
!= current_buffer
4142 && waiting_for_user_input_p
== -1)
4143 record_asynch_buffer_change ();
4145 if (timers_run
!= old_timers_run
&& do_display
)
4146 /* We must retry, since a timer may have requeued itself
4147 and that could alter the time_delay. */
4148 redisplay_preserve_echo_area (9);
4152 while (!detect_input_pending ());
4154 /* If there is unread keyboard input, also return. */
4156 && requeued_events_pending_p ())
4159 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4161 EMACS_TIME difference
;
4162 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4163 if (EMACS_TIME_NEG_P (difference
))
4165 timeout
= timer_delay
;
4166 timeout_reduced_for_timers
= 1;
4169 /* If time_limit is -1, we are not going to wait at all. */
4170 else if (time_limit
!= -1)
4172 /* This is so a breakpoint can be put here. */
4173 wait_reading_process_output_1 ();
4177 /* Cause C-g and alarm signals to take immediate action,
4178 and cause input available signals to zero out timeout.
4180 It is important that we do this before checking for process
4181 activity. If we get a SIGCHLD after the explicit checks for
4182 process activity, timeout is the only way we will know. */
4184 set_waiting_for_input (&timeout
);
4186 /* If status of something has changed, and no input is
4187 available, notify the user of the change right away. After
4188 this explicit check, we'll let the SIGCHLD handler zap
4189 timeout to get our attention. */
4190 if (update_tick
!= process_tick
&& do_display
)
4193 #ifdef NON_BLOCKING_CONNECT
4197 Atemp
= input_wait_mask
;
4199 /* On Mac OS X 10.0, the SELECT system call always says input is
4200 present (for reading) at stdin, even when none is. This
4201 causes the call to SELECT below to return 1 and
4202 status_notify not to be called. As a result output of
4203 subprocesses are incorrectly discarded.
4207 IF_NON_BLOCKING_CONNECT (Ctemp
= connect_wait_mask
);
4209 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4210 if ((select (max (max_process_desc
, max_keyboard_desc
) + 1,
4212 #ifdef NON_BLOCKING_CONNECT
4213 (num_pending_connects
> 0 ? &Ctemp
: (SELECT_TYPE
*)0),
4217 (SELECT_TYPE
*)0, &timeout
)
4220 /* It's okay for us to do this and then continue with
4221 the loop, since timeout has already been zeroed out. */
4222 clear_waiting_for_input ();
4227 /* Don't wait for output from a non-running process. Just
4228 read whatever data has already been received. */
4229 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
4230 update_status (wait_proc
);
4232 && ! EQ (wait_proc
->status
, Qrun
)
4233 && ! EQ (wait_proc
->status
, Qconnect
))
4235 int nread
, total_nread
= 0;
4237 clear_waiting_for_input ();
4238 XSETPROCESS (proc
, wait_proc
);
4240 /* Read data from the process, until we exhaust it. */
4241 while (XINT (wait_proc
->infd
) >= 0)
4243 nread
= read_process_output (proc
, XINT (wait_proc
->infd
));
4249 total_nread
+= nread
;
4251 else if (nread
== -1 && EIO
== errno
)
4255 else if (nread
== -1 && EAGAIN
== errno
)
4259 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4263 if (total_nread
> 0 && do_display
)
4264 redisplay_preserve_echo_area (10);
4269 /* Wait till there is something to do */
4271 if (wait_proc
&& just_wait_proc
)
4273 if (XINT (wait_proc
->infd
) < 0) /* Terminated */
4275 FD_SET (XINT (wait_proc
->infd
), &Available
);
4277 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4279 else if (!NILP (wait_for_cell
))
4281 Available
= non_process_wait_mask
;
4283 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4288 Available
= non_keyboard_wait_mask
;
4290 Available
= input_wait_mask
;
4291 IF_NON_BLOCKING_CONNECT (check_connect
= (num_pending_connects
> 0));
4292 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4295 /* If frame size has changed or the window is newly mapped,
4296 redisplay now, before we start to wait. There is a race
4297 condition here; if a SIGIO arrives between now and the select
4298 and indicates that a frame is trashed, the select may block
4299 displaying a trashed screen. */
4300 if (frame_garbaged
&& do_display
)
4302 clear_waiting_for_input ();
4303 redisplay_preserve_echo_area (11);
4305 set_waiting_for_input (&timeout
);
4309 if (read_kbd
&& detect_input_pending ())
4316 #ifdef NON_BLOCKING_CONNECT
4318 Connecting
= connect_wait_mask
;
4321 #ifdef ADAPTIVE_READ_BUFFERING
4322 if (process_output_skip
&& check_delay
> 0)
4324 int usecs
= EMACS_USECS (timeout
);
4325 if (EMACS_SECS (timeout
) > 0 || usecs
> READ_OUTPUT_DELAY_MAX
)
4326 usecs
= READ_OUTPUT_DELAY_MAX
;
4327 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4329 proc
= chan_process
[channel
];
4332 if (XINT (XPROCESS (proc
)->read_output_delay
) > 0)
4335 if (NILP (XPROCESS (proc
)->read_output_skip
))
4337 FD_CLR (channel
, &Available
);
4338 XPROCESS (proc
)->read_output_skip
= Qnil
;
4339 if (XINT (XPROCESS (proc
)->read_output_delay
) < usecs
)
4340 usecs
= XINT (XPROCESS (proc
)->read_output_delay
);
4343 EMACS_SET_SECS_USECS (timeout
, 0, usecs
);
4344 process_output_skip
= 0;
4348 nfds
= select (max (max_process_desc
, max_keyboard_desc
) + 1,
4350 #ifdef NON_BLOCKING_CONNECT
4351 (check_connect
? &Connecting
: (SELECT_TYPE
*)0),
4355 (SELECT_TYPE
*)0, &timeout
);
4360 /* Make C-g and alarm signals set flags again */
4361 clear_waiting_for_input ();
4363 /* If we woke up due to SIGWINCH, actually change size now. */
4364 do_pending_window_change (0);
4366 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4367 /* We wanted the full specified time, so return now. */
4371 if (xerrno
== EINTR
)
4374 /* Ultrix select seems to return ENOMEM when it is
4375 interrupted. Treat it just like EINTR. Bleah. Note
4376 that we want to test for the "ultrix" CPP symbol, not
4377 "__ultrix__"; the latter is only defined under GCC, but
4378 not by DEC's bundled CC. -JimB */
4379 else if (xerrno
== ENOMEM
)
4383 /* This happens for no known reason on ALLIANT.
4384 I am guessing that this is the right response. -- RMS. */
4385 else if (xerrno
== EFAULT
)
4388 else if (xerrno
== EBADF
)
4391 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4392 the child's closure of the pts gives the parent a SIGHUP, and
4393 the ptc file descriptor is automatically closed,
4394 yielding EBADF here or at select() call above.
4395 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4396 in m/ibmrt-aix.h), and here we just ignore the select error.
4397 Cleanup occurs c/o status_notify after SIGCLD. */
4398 no_avail
= 1; /* Cannot depend on values returned */
4404 error ("select error: %s", emacs_strerror (xerrno
));
4409 FD_ZERO (&Available
);
4410 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4413 #if defined(sun) && !defined(USG5_4)
4414 if (nfds
> 0 && keyboard_bit_set (&Available
)
4416 /* System sometimes fails to deliver SIGIO.
4418 David J. Mackenzie says that Emacs doesn't compile under
4419 Solaris if this code is enabled, thus the USG5_4 in the CPP
4420 conditional. "I haven't noticed any ill effects so far.
4421 If you find a Solaris expert somewhere, they might know
4423 kill (getpid (), SIGIO
);
4426 #if 0 /* When polling is used, interrupt_input is 0,
4427 so get_input_pending should read the input.
4428 So this should not be needed. */
4429 /* If we are using polling for input,
4430 and we see input available, make it get read now.
4431 Otherwise it might not actually get read for a second.
4432 And on hpux, since we turn off polling in wait_reading_process_output,
4433 it might never get read at all if we don't spend much time
4434 outside of wait_reading_process_output. */
4435 if (read_kbd
&& interrupt_input
4436 && keyboard_bit_set (&Available
)
4437 && input_polling_used ())
4438 kill (getpid (), SIGALRM
);
4441 /* Check for keyboard input */
4442 /* If there is any, return immediately
4443 to give it higher priority than subprocesses */
4447 int old_timers_run
= timers_run
;
4448 struct buffer
*old_buffer
= current_buffer
;
4451 if (detect_input_pending_run_timers (do_display
))
4453 swallow_events (do_display
);
4454 if (detect_input_pending_run_timers (do_display
))
4458 /* If a timer has run, this might have changed buffers
4459 an alike. Make read_key_sequence aware of that. */
4460 if (timers_run
!= old_timers_run
4461 && waiting_for_user_input_p
== -1
4462 && old_buffer
!= current_buffer
)
4463 record_asynch_buffer_change ();
4469 /* If there is unread keyboard input, also return. */
4471 && requeued_events_pending_p ())
4474 /* If we are not checking for keyboard input now,
4475 do process events (but don't run any timers).
4476 This is so that X events will be processed.
4477 Otherwise they may have to wait until polling takes place.
4478 That would causes delays in pasting selections, for example.
4480 (We used to do this only if wait_for_cell.) */
4481 if (read_kbd
== 0 && detect_input_pending ())
4483 swallow_events (do_display
);
4484 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4485 if (detect_input_pending ())
4490 /* Exit now if the cell we're waiting for became non-nil. */
4491 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4495 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4496 go read it. This can happen with X on BSD after logging out.
4497 In that case, there really is no input and no SIGIO,
4498 but select says there is input. */
4500 if (read_kbd
&& interrupt_input
4501 && keyboard_bit_set (&Available
) && ! noninteractive
)
4502 kill (getpid (), SIGIO
);
4506 got_some_input
|= nfds
> 0;
4508 /* If checking input just got us a size-change event from X,
4509 obey it now if we should. */
4510 if (read_kbd
|| ! NILP (wait_for_cell
))
4511 do_pending_window_change (0);
4513 /* Check for data from a process. */
4514 if (no_avail
|| nfds
== 0)
4517 /* Really FIRST_PROC_DESC should be 0 on Unix,
4518 but this is safer in the short run. */
4519 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4521 if (FD_ISSET (channel
, &Available
)
4522 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
4526 /* If waiting for this channel, arrange to return as
4527 soon as no more input to be processed. No more
4529 if (wait_channel
== channel
)
4535 proc
= chan_process
[channel
];
4539 /* If this is a server stream socket, accept connection. */
4540 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4542 server_accept_connection (proc
, channel
);
4546 /* Read data from the process, starting with our
4547 buffered-ahead character if we have one. */
4549 nread
= read_process_output (proc
, channel
);
4552 /* Since read_process_output can run a filter,
4553 which can call accept-process-output,
4554 don't try to read from any other processes
4555 before doing the select again. */
4556 FD_ZERO (&Available
);
4559 redisplay_preserve_echo_area (12);
4562 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4565 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4566 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4568 else if (nread
== -1 && errno
== EAGAIN
)
4572 else if (nread
== -1 && errno
== EAGAIN
)
4574 /* Note that we cannot distinguish between no input
4575 available now and a closed pipe.
4576 With luck, a closed pipe will be accompanied by
4577 subprocess termination and SIGCHLD. */
4578 else if (nread
== 0 && !NETCONN_P (proc
))
4580 #endif /* O_NDELAY */
4581 #endif /* O_NONBLOCK */
4583 /* On some OSs with ptys, when the process on one end of
4584 a pty exits, the other end gets an error reading with
4585 errno = EIO instead of getting an EOF (0 bytes read).
4586 Therefore, if we get an error reading and errno =
4587 EIO, just continue, because the child process has
4588 exited and should clean itself up soon (e.g. when we
4591 However, it has been known to happen that the SIGCHLD
4592 got lost. So raise the signl again just in case.
4594 else if (nread
== -1 && errno
== EIO
)
4595 kill (getpid (), SIGCHLD
);
4596 #endif /* HAVE_PTYS */
4597 /* If we can detect process termination, don't consider the process
4598 gone just because its pipe is closed. */
4600 else if (nread
== 0 && !NETCONN_P (proc
))
4605 /* Preserve status of processes already terminated. */
4606 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
4607 deactivate_process (proc
);
4608 if (!NILP (XPROCESS (proc
)->raw_status_low
))
4609 update_status (XPROCESS (proc
));
4610 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4611 XPROCESS (proc
)->status
4612 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
4615 #ifdef NON_BLOCKING_CONNECT
4616 if (check_connect
&& FD_ISSET (channel
, &Connecting
)
4617 && FD_ISSET (channel
, &connect_wait_mask
))
4619 struct Lisp_Process
*p
;
4621 FD_CLR (channel
, &connect_wait_mask
);
4622 if (--num_pending_connects
< 0)
4625 proc
= chan_process
[channel
];
4629 p
= XPROCESS (proc
);
4632 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4633 So only use it on systems where it is known to work. */
4635 int xlen
= sizeof(xerrno
);
4636 if (getsockopt(channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4641 struct sockaddr pname
;
4642 int pnamelen
= sizeof(pname
);
4644 /* If connection failed, getpeername will fail. */
4646 if (getpeername(channel
, &pname
, &pnamelen
) < 0)
4648 /* Obtain connect failure code through error slippage. */
4651 if (errno
== ENOTCONN
&& read(channel
, &dummy
, 1) < 0)
4658 XSETINT (p
->tick
, ++process_tick
);
4659 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
4660 deactivate_process (proc
);
4665 /* Execute the sentinel here. If we had relied on
4666 status_notify to do it later, it will read input
4667 from the process before calling the sentinel. */
4668 exec_sentinel (proc
, build_string ("open\n"));
4669 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4671 FD_SET (XINT (p
->infd
), &input_wait_mask
);
4672 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
4676 #endif /* NON_BLOCKING_CONNECT */
4677 } /* end for each file descriptor */
4678 } /* end while exit conditions not met */
4680 waiting_for_user_input_p
= saved_waiting_for_user_input_p
;
4682 /* If calling from keyboard input, do not quit
4683 since we want to return C-g as an input character.
4684 Otherwise, do pending quit if requested. */
4687 /* Prevent input_pending from remaining set if we quit. */
4688 clear_input_pending ();
4691 #ifdef POLL_INTERRUPTED_SYS_CALL
4692 /* AlainF 5-Jul-1996
4693 HP-UX 10.10 seems to have problems with signals coming in
4694 Causes "poll: interrupted system call" messages when Emacs is run
4696 Turn periodic alarms back on */
4698 #endif /* POLL_INTERRUPTED_SYS_CALL */
4700 return got_some_input
;
4703 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
4706 read_process_output_call (fun_and_args
)
4707 Lisp_Object fun_and_args
;
4709 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
4713 read_process_output_error_handler (error
)
4716 cmd_error_internal (error
, "error in process filter: ");
4718 update_echo_area ();
4719 Fsleep_for (make_number (2), Qnil
);
4723 /* Read pending output from the process channel,
4724 starting with our buffered-ahead character if we have one.
4725 Yield number of decoded characters read.
4727 This function reads at most 4096 characters.
4728 If you want to read all available subprocess output,
4729 you must call it repeatedly until it returns zero.
4731 The characters read are decoded according to PROC's coding-system
4735 read_process_output (proc
, channel
)
4737 register int channel
;
4739 register int nbytes
;
4741 register Lisp_Object outstream
;
4742 register struct buffer
*old
= current_buffer
;
4743 register struct Lisp_Process
*p
= XPROCESS (proc
);
4744 register int opoint
;
4745 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
4746 int carryover
= XINT (p
->decoding_carryover
);
4750 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
4752 vs
= get_vms_process_pointer (p
->pid
);
4756 return (0); /* Really weird if it does this */
4757 if (!(vs
->iosb
[0] & 1))
4758 return -1; /* I/O error */
4761 error ("Could not get VMS process pointer");
4762 chars
= vs
->inputBuffer
;
4763 nbytes
= clean_vms_buffer (chars
, vs
->iosb
[1]);
4766 start_vms_process_read (vs
); /* Crank up the next read on the process */
4767 return 1; /* Nothing worth printing, say we got 1 */
4771 /* The data carried over in the previous decoding (which are at
4772 the tail of decoding buffer) should be prepended to the new
4773 data read to decode all together. */
4774 chars
= (char *) alloca (nbytes
+ carryover
);
4775 bcopy (SDATA (p
->decoding_buf
), buf
, carryover
);
4776 bcopy (vs
->inputBuffer
, chars
+ carryover
, nbytes
);
4780 chars
= (char *) alloca (carryover
+ readmax
);
4782 /* See the comment above. */
4783 bcopy (SDATA (p
->decoding_buf
), chars
, carryover
);
4785 #ifdef DATAGRAM_SOCKETS
4786 /* We have a working select, so proc_buffered_char is always -1. */
4787 if (DATAGRAM_CHAN_P (channel
))
4789 int len
= datagram_address
[channel
].len
;
4790 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
4791 0, datagram_address
[channel
].sa
, &len
);
4795 if (proc_buffered_char
[channel
] < 0)
4797 nbytes
= emacs_read (channel
, chars
+ carryover
, readmax
);
4798 #ifdef ADAPTIVE_READ_BUFFERING
4799 if (nbytes
> 0 && !NILP (p
->adaptive_read_buffering
))
4801 int delay
= XINT (p
->read_output_delay
);
4804 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
4807 process_output_delay_count
++;
4808 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
4811 else if (delay
> 0 && (nbytes
== readmax
))
4813 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
4815 process_output_delay_count
--;
4817 XSETINT (p
->read_output_delay
, delay
);
4820 p
->read_output_skip
= Qt
;
4821 process_output_skip
= 1;
4828 chars
[carryover
] = proc_buffered_char
[channel
];
4829 proc_buffered_char
[channel
] = -1;
4830 nbytes
= emacs_read (channel
, chars
+ carryover
+ 1, readmax
- 1);
4834 nbytes
= nbytes
+ 1;
4836 #endif /* not VMS */
4838 XSETINT (p
->decoding_carryover
, 0);
4840 /* At this point, NBYTES holds number of bytes just received
4841 (including the one in proc_buffered_char[channel]). */
4844 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
4846 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
4849 /* Now set NBYTES how many bytes we must decode. */
4850 nbytes
+= carryover
;
4852 /* Read and dispose of the process output. */
4853 outstream
= p
->filter
;
4854 if (!NILP (outstream
))
4856 /* We inhibit quit here instead of just catching it so that
4857 hitting ^G when a filter happens to be running won't screw
4859 int count
= SPECPDL_INDEX ();
4860 Lisp_Object odeactivate
;
4861 Lisp_Object obuffer
, okeymap
;
4863 int outer_running_asynch_code
= running_asynch_code
;
4864 int waiting
= waiting_for_user_input_p
;
4866 /* No need to gcpro these, because all we do with them later
4867 is test them for EQness, and none of them should be a string. */
4868 odeactivate
= Vdeactivate_mark
;
4869 XSETBUFFER (obuffer
, current_buffer
);
4870 okeymap
= current_buffer
->keymap
;
4872 specbind (Qinhibit_quit
, Qt
);
4873 specbind (Qlast_nonmenu_event
, Qt
);
4875 /* In case we get recursively called,
4876 and we already saved the match data nonrecursively,
4877 save the same match data in safely recursive fashion. */
4878 if (outer_running_asynch_code
)
4881 /* Don't clobber the CURRENT match data, either! */
4882 tem
= Fmatch_data (Qnil
, Qnil
);
4883 restore_match_data ();
4884 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
4885 Fset_match_data (tem
);
4888 /* For speed, if a search happens within this code,
4889 save the match data in a special nonrecursive fashion. */
4890 running_asynch_code
= 1;
4892 text
= decode_coding_string (make_unibyte_string (chars
, nbytes
),
4894 Vlast_coding_system_used
= coding
->symbol
;
4895 /* A new coding system might be found. */
4896 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
4898 p
->decode_coding_system
= coding
->symbol
;
4900 /* Don't call setup_coding_system for
4901 proc_decode_coding_system[channel] here. It is done in
4902 detect_coding called via decode_coding above. */
4904 /* If a coding system for encoding is not yet decided, we set
4905 it as the same as coding-system for decoding.
4907 But, before doing that we must check if
4908 proc_encode_coding_system[p->outfd] surely points to a
4909 valid memory because p->outfd will be changed once EOF is
4910 sent to the process. */
4911 if (NILP (p
->encode_coding_system
)
4912 && proc_encode_coding_system
[XINT (p
->outfd
)])
4914 p
->encode_coding_system
= coding
->symbol
;
4915 setup_coding_system (coding
->symbol
,
4916 proc_encode_coding_system
[XINT (p
->outfd
)]);
4920 carryover
= nbytes
- coding
->consumed
;
4921 if (SCHARS (p
->decoding_buf
) < carryover
)
4922 p
->decoding_buf
= make_uninit_string (carryover
);
4923 bcopy (chars
+ coding
->consumed
, SDATA (p
->decoding_buf
),
4925 XSETINT (p
->decoding_carryover
, carryover
);
4926 /* Adjust the multibyteness of TEXT to that of the filter. */
4927 if (NILP (p
->filter_multibyte
) != ! STRING_MULTIBYTE (text
))
4928 text
= (STRING_MULTIBYTE (text
)
4929 ? Fstring_as_unibyte (text
)
4930 : Fstring_to_multibyte (text
));
4931 if (SBYTES (text
) > 0)
4932 internal_condition_case_1 (read_process_output_call
,
4934 Fcons (proc
, Fcons (text
, Qnil
))),
4935 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
4936 read_process_output_error_handler
);
4938 /* If we saved the match data nonrecursively, restore it now. */
4939 restore_match_data ();
4940 running_asynch_code
= outer_running_asynch_code
;
4942 /* Handling the process output should not deactivate the mark. */
4943 Vdeactivate_mark
= odeactivate
;
4945 /* Restore waiting_for_user_input_p as it was
4946 when we were called, in case the filter clobbered it. */
4947 waiting_for_user_input_p
= waiting
;
4949 #if 0 /* Call record_asynch_buffer_change unconditionally,
4950 because we might have changed minor modes or other things
4951 that affect key bindings. */
4952 if (! EQ (Fcurrent_buffer (), obuffer
)
4953 || ! EQ (current_buffer
->keymap
, okeymap
))
4955 /* But do it only if the caller is actually going to read events.
4956 Otherwise there's no need to make him wake up, and it could
4957 cause trouble (for example it would make Fsit_for return). */
4958 if (waiting_for_user_input_p
== -1)
4959 record_asynch_buffer_change ();
4962 start_vms_process_read (vs
);
4964 unbind_to (count
, Qnil
);
4968 /* If no filter, write into buffer if it isn't dead. */
4969 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
4971 Lisp_Object old_read_only
;
4972 int old_begv
, old_zv
;
4973 int old_begv_byte
, old_zv_byte
;
4974 Lisp_Object odeactivate
;
4975 int before
, before_byte
;
4980 odeactivate
= Vdeactivate_mark
;
4982 Fset_buffer (p
->buffer
);
4984 opoint_byte
= PT_BYTE
;
4985 old_read_only
= current_buffer
->read_only
;
4988 old_begv_byte
= BEGV_BYTE
;
4989 old_zv_byte
= ZV_BYTE
;
4991 current_buffer
->read_only
= Qnil
;
4993 /* Insert new output into buffer
4994 at the current end-of-output marker,
4995 thus preserving logical ordering of input and output. */
4996 if (XMARKER (p
->mark
)->buffer
)
4997 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
4998 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
5001 SET_PT_BOTH (ZV
, ZV_BYTE
);
5003 before_byte
= PT_BYTE
;
5005 /* If the output marker is outside of the visible region, save
5006 the restriction and widen. */
5007 if (! (BEGV
<= PT
&& PT
<= ZV
))
5010 text
= decode_coding_string (make_unibyte_string (chars
, nbytes
),
5012 Vlast_coding_system_used
= coding
->symbol
;
5013 /* A new coding system might be found. See the comment in the
5014 similar code in the previous `if' block. */
5015 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
5017 p
->decode_coding_system
= coding
->symbol
;
5018 if (NILP (p
->encode_coding_system
)
5019 && proc_encode_coding_system
[XINT (p
->outfd
)])
5021 p
->encode_coding_system
= coding
->symbol
;
5022 setup_coding_system (coding
->symbol
,
5023 proc_encode_coding_system
[XINT (p
->outfd
)]);
5026 carryover
= nbytes
- coding
->consumed
;
5027 if (SCHARS (p
->decoding_buf
) < carryover
)
5028 p
->decoding_buf
= make_uninit_string (carryover
);
5029 bcopy (chars
+ coding
->consumed
, SDATA (p
->decoding_buf
),
5031 XSETINT (p
->decoding_carryover
, carryover
);
5032 /* Adjust the multibyteness of TEXT to that of the buffer. */
5033 if (NILP (current_buffer
->enable_multibyte_characters
)
5034 != ! STRING_MULTIBYTE (text
))
5035 text
= (STRING_MULTIBYTE (text
)
5036 ? Fstring_as_unibyte (text
)
5037 : Fstring_to_multibyte (text
));
5038 /* Insert before markers in case we are inserting where
5039 the buffer's mark is, and the user's next command is Meta-y. */
5040 insert_from_string_before_markers (text
, 0, 0,
5041 SCHARS (text
), SBYTES (text
), 0);
5043 /* Make sure the process marker's position is valid when the
5044 process buffer is changed in the signal_after_change above.
5045 W3 is known to do that. */
5046 if (BUFFERP (p
->buffer
)
5047 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5048 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5050 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5052 update_mode_lines
++;
5054 /* Make sure opoint and the old restrictions
5055 float ahead of any new text just as point would. */
5056 if (opoint
>= before
)
5058 opoint
+= PT
- before
;
5059 opoint_byte
+= PT_BYTE
- before_byte
;
5061 if (old_begv
> before
)
5063 old_begv
+= PT
- before
;
5064 old_begv_byte
+= PT_BYTE
- before_byte
;
5066 if (old_zv
>= before
)
5068 old_zv
+= PT
- before
;
5069 old_zv_byte
+= PT_BYTE
- before_byte
;
5072 /* If the restriction isn't what it should be, set it. */
5073 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5074 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5076 /* Handling the process output should not deactivate the mark. */
5077 Vdeactivate_mark
= odeactivate
;
5079 current_buffer
->read_only
= old_read_only
;
5080 SET_PT_BOTH (opoint
, opoint_byte
);
5081 set_buffer_internal (old
);
5084 start_vms_process_read (vs
);
5089 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
5091 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
5092 This is intended for use by asynchronous process output filters and sentinels. */)
5095 return (waiting_for_user_input_p
? Qt
: Qnil
);
5098 /* Sending data to subprocess */
5100 jmp_buf send_process_frame
;
5101 Lisp_Object process_sent_to
;
5104 send_process_trap ()
5106 SIGNAL_THREAD_CHECK (SIGPIPE
);
5111 sigunblock (sigmask (SIGPIPE
));
5112 longjmp (send_process_frame
, 1);
5115 /* Send some data to process PROC.
5116 BUF is the beginning of the data; LEN is the number of characters.
5117 OBJECT is the Lisp object that the data comes from. If OBJECT is
5118 nil or t, it means that the data comes from C string.
5120 If OBJECT is not nil, the data is encoded by PROC's coding-system
5121 for encoding before it is sent.
5123 This function can evaluate Lisp code and can garbage collect. */
5126 send_process (proc
, buf
, len
, object
)
5127 volatile Lisp_Object proc
;
5128 unsigned char *volatile buf
;
5130 volatile Lisp_Object object
;
5132 /* Use volatile to protect variables from being clobbered by longjmp. */
5133 struct Lisp_Process
*p
= XPROCESS (proc
);
5135 struct coding_system
*coding
;
5136 struct gcpro gcpro1
;
5137 SIGTYPE (*volatile old_sigpipe
) ();
5142 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
5145 if (! NILP (p
->raw_status_low
))
5147 if (! EQ (p
->status
, Qrun
))
5148 error ("Process %s not running", SDATA (p
->name
));
5149 if (XINT (p
->outfd
) < 0)
5150 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5152 coding
= proc_encode_coding_system
[XINT (p
->outfd
)];
5153 Vlast_coding_system_used
= coding
->symbol
;
5155 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5156 || (BUFFERP (object
)
5157 && !NILP (XBUFFER (object
)->enable_multibyte_characters
))
5160 if (!EQ (coding
->symbol
, p
->encode_coding_system
))
5161 /* The coding system for encoding was changed to raw-text
5162 because we sent a unibyte text previously. Now we are
5163 sending a multibyte text, thus we must encode it by the
5164 original coding system specified for the current process. */
5165 setup_coding_system (p
->encode_coding_system
, coding
);
5166 /* src_multibyte should be set to 1 _after_ a call to
5167 setup_coding_system, since it resets src_multibyte to
5169 coding
->src_multibyte
= 1;
5173 /* For sending a unibyte text, character code conversion should
5174 not take place but EOL conversion should. So, setup raw-text
5175 or one of the subsidiary if we have not yet done it. */
5176 if (coding
->type
!= coding_type_raw_text
)
5178 if (CODING_REQUIRE_FLUSHING (coding
))
5180 /* But, before changing the coding, we must flush out data. */
5181 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5182 send_process (proc
, "", 0, Qt
);
5184 coding
->src_multibyte
= 0;
5185 setup_raw_text_coding_system (coding
);
5188 coding
->dst_multibyte
= 0;
5190 if (CODING_REQUIRE_ENCODING (coding
))
5192 int require
= encoding_buffer_size (coding
, len
);
5193 int from_byte
= -1, from
= -1, to
= -1;
5195 if (BUFFERP (object
))
5197 from_byte
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
5198 from
= buf_bytepos_to_charpos (XBUFFER (object
), from_byte
);
5199 to
= buf_bytepos_to_charpos (XBUFFER (object
), from_byte
+ len
);
5201 else if (STRINGP (object
))
5203 from_byte
= buf
- SDATA (object
);
5204 from
= string_byte_to_char (object
, from_byte
);
5205 to
= string_byte_to_char (object
, from_byte
+ len
);
5208 if (coding
->composing
!= COMPOSITION_DISABLED
)
5211 coding_save_composition (coding
, from
, to
, object
);
5213 coding
->composing
= COMPOSITION_DISABLED
;
5216 if (SBYTES (p
->encoding_buf
) < require
)
5217 p
->encoding_buf
= make_uninit_string (require
);
5220 buf
= (BUFFERP (object
)
5221 ? BUF_BYTE_ADDRESS (XBUFFER (object
), from_byte
)
5222 : SDATA (object
) + from_byte
);
5224 object
= p
->encoding_buf
;
5225 encode_coding (coding
, (char *) buf
, SDATA (object
),
5226 len
, SBYTES (object
));
5227 coding_free_composition_data (coding
);
5228 len
= coding
->produced
;
5229 buf
= SDATA (object
);
5233 vs
= get_vms_process_pointer (p
->pid
);
5235 error ("Could not find this process: %x", p
->pid
);
5236 else if (write_to_vms_process (vs
, buf
, len
))
5240 if (pty_max_bytes
== 0)
5242 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5243 pty_max_bytes
= fpathconf (XFASTINT (p
->outfd
), _PC_MAX_CANON
);
5244 if (pty_max_bytes
< 0)
5245 pty_max_bytes
= 250;
5247 pty_max_bytes
= 250;
5249 /* Deduct one, to leave space for the eof. */
5253 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
5254 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
5255 when returning with longjmp despite being declared volatile. */
5256 if (!setjmp (send_process_frame
))
5258 process_sent_to
= proc
;
5263 /* Decide how much data we can send in one batch.
5264 Long lines need to be split into multiple batches. */
5265 if (!NILP (p
->pty_flag
))
5267 /* Starting this at zero is always correct when not the first
5268 iteration because the previous iteration ended by sending C-d.
5269 It may not be correct for the first iteration
5270 if a partial line was sent in a separate send_process call.
5271 If that proves worth handling, we need to save linepos
5272 in the process object. */
5274 unsigned char *ptr
= (unsigned char *) buf
;
5275 unsigned char *end
= (unsigned char *) buf
+ len
;
5277 /* Scan through this text for a line that is too long. */
5278 while (ptr
!= end
&& linepos
< pty_max_bytes
)
5286 /* If we found one, break the line there
5287 and put in a C-d to force the buffer through. */
5291 /* Send this batch, using one or more write calls. */
5294 int outfd
= XINT (p
->outfd
);
5295 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
5296 #ifdef DATAGRAM_SOCKETS
5297 if (DATAGRAM_CHAN_P (outfd
))
5299 rv
= sendto (outfd
, (char *) buf
, this,
5300 0, datagram_address
[outfd
].sa
,
5301 datagram_address
[outfd
].len
);
5302 if (rv
< 0 && errno
== EMSGSIZE
)
5304 signal (SIGPIPE
, old_sigpipe
);
5305 report_file_error ("sending datagram",
5306 Fcons (proc
, Qnil
));
5312 rv
= emacs_write (outfd
, (char *) buf
, this);
5313 #ifdef ADAPTIVE_READ_BUFFERING
5314 if (XINT (p
->read_output_delay
) > 0
5315 && EQ (p
->adaptive_read_buffering
, Qt
))
5317 XSETFASTINT (p
->read_output_delay
, 0);
5318 process_output_delay_count
--;
5319 p
->read_output_skip
= Qnil
;
5323 signal (SIGPIPE
, old_sigpipe
);
5329 || errno
== EWOULDBLOCK
5335 /* Buffer is full. Wait, accepting input;
5336 that may allow the program
5337 to finish doing output and read more. */
5341 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5342 /* A gross hack to work around a bug in FreeBSD.
5343 In the following sequence, read(2) returns
5347 write(2) 954 bytes, get EAGAIN
5348 read(2) 1024 bytes in process_read_output
5349 read(2) 11 bytes in process_read_output
5351 That is, read(2) returns more bytes than have
5352 ever been written successfully. The 1033 bytes
5353 read are the 1022 bytes written successfully
5354 after processing (for example with CRs added if
5355 the terminal is set up that way which it is
5356 here). The same bytes will be seen again in a
5357 later read(2), without the CRs. */
5359 if (errno
== EAGAIN
)
5362 ioctl (XINT (p
->outfd
), TIOCFLUSH
, &flags
);
5364 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5366 /* Running filters might relocate buffers or strings.
5367 Arrange to relocate BUF. */
5368 if (BUFFERP (object
))
5369 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
5370 else if (STRINGP (object
))
5371 offset
= buf
- SDATA (object
);
5373 #ifdef EMACS_HAS_USECS
5374 wait_reading_process_output (0, 20000, 0, 0, Qnil
, NULL
, 0);
5376 wait_reading_process_output (1, 0, 0, 0, Qnil
, NULL
, 0);
5379 if (BUFFERP (object
))
5380 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
5381 else if (STRINGP (object
))
5382 buf
= offset
+ SDATA (object
);
5387 /* This is a real error. */
5388 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5395 /* If we sent just part of the string, put in an EOF
5396 to force it through, before we send the rest. */
5398 Fprocess_send_eof (proc
);
5401 #endif /* not VMS */
5404 signal (SIGPIPE
, old_sigpipe
);
5406 proc
= process_sent_to
;
5407 p
= XPROCESS (proc
);
5409 p
->raw_status_low
= Qnil
;
5410 p
->raw_status_high
= Qnil
;
5411 p
->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5412 XSETINT (p
->tick
, ++process_tick
);
5413 deactivate_process (proc
);
5415 error ("Error writing to process %s; closed it", SDATA (p
->name
));
5417 error ("SIGPIPE raised on process %s; closed it", SDATA (p
->name
));
5424 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5426 doc
: /* Send current contents of region as input to PROCESS.
5427 PROCESS may be a process, a buffer, the name of a process or buffer, or
5428 nil, indicating the current buffer's process.
5429 Called from program, takes three arguments, PROCESS, START and END.
5430 If the region is more than 500 characters long,
5431 it is sent in several bunches. This may happen even for shorter regions.
5432 Output from processes can arrive in between bunches. */)
5433 (process
, start
, end
)
5434 Lisp_Object process
, start
, end
;
5439 proc
= get_process (process
);
5440 validate_region (&start
, &end
);
5442 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5443 move_gap (XINT (start
));
5445 start1
= CHAR_TO_BYTE (XINT (start
));
5446 end1
= CHAR_TO_BYTE (XINT (end
));
5447 send_process (proc
, BYTE_POS_ADDR (start1
), end1
- start1
,
5448 Fcurrent_buffer ());
5453 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5455 doc
: /* Send PROCESS the contents of STRING as input.
5456 PROCESS may be a process, a buffer, the name of a process or buffer, or
5457 nil, indicating the current buffer's process.
5458 If STRING is more than 500 characters long,
5459 it is sent in several bunches. This may happen even for shorter strings.
5460 Output from processes can arrive in between bunches. */)
5462 Lisp_Object process
, string
;
5465 CHECK_STRING (string
);
5466 proc
= get_process (process
);
5467 send_process (proc
, SDATA (string
),
5468 SBYTES (string
), string
);
5472 /* Return the foreground process group for the tty/pty that
5473 the process P uses. */
5475 emacs_get_tty_pgrp (p
)
5476 struct Lisp_Process
*p
;
5481 if (ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5484 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5485 master side. Try the slave side. */
5486 fd
= emacs_open (XSTRING (p
->tty_name
)->data
, O_RDONLY
, 0);
5490 ioctl (fd
, TIOCGPGRP
, &gid
);
5494 #endif /* defined (TIOCGPGRP ) */
5499 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5500 Sprocess_running_child_p
, 0, 1, 0,
5501 doc
: /* Return t if PROCESS has given the terminal to a child.
5502 If the operating system does not make it possible to find out,
5503 return t unconditionally. */)
5505 Lisp_Object process
;
5507 /* Initialize in case ioctl doesn't exist or gives an error,
5508 in a way that will cause returning t. */
5511 struct Lisp_Process
*p
;
5513 proc
= get_process (process
);
5514 p
= XPROCESS (proc
);
5516 if (!EQ (p
->childp
, Qt
))
5517 error ("Process %s is not a subprocess",
5519 if (XINT (p
->infd
) < 0)
5520 error ("Process %s is not active",
5523 gid
= emacs_get_tty_pgrp (p
);
5525 if (gid
== XFASTINT (p
->pid
))
5530 /* send a signal number SIGNO to PROCESS.
5531 If CURRENT_GROUP is t, that means send to the process group
5532 that currently owns the terminal being used to communicate with PROCESS.
5533 This is used for various commands in shell mode.
5534 If CURRENT_GROUP is lambda, that means send to the process group
5535 that currently owns the terminal, but only if it is NOT the shell itself.
5537 If NOMSG is zero, insert signal-announcements into process's buffers
5540 If we can, we try to signal PROCESS by sending control characters
5541 down the pty. This allows us to signal inferiors who have changed
5542 their uid, for which killpg would return an EPERM error. */
5545 process_send_signal (process
, signo
, current_group
, nomsg
)
5546 Lisp_Object process
;
5548 Lisp_Object current_group
;
5552 register struct Lisp_Process
*p
;
5556 proc
= get_process (process
);
5557 p
= XPROCESS (proc
);
5559 if (!EQ (p
->childp
, Qt
))
5560 error ("Process %s is not a subprocess",
5562 if (XINT (p
->infd
) < 0)
5563 error ("Process %s is not active",
5566 if (NILP (p
->pty_flag
))
5567 current_group
= Qnil
;
5569 /* If we are using pgrps, get a pgrp number and make it negative. */
5570 if (NILP (current_group
))
5571 /* Send the signal to the shell's process group. */
5572 gid
= XFASTINT (p
->pid
);
5575 #ifdef SIGNALS_VIA_CHARACTERS
5576 /* If possible, send signals to the entire pgrp
5577 by sending an input character to it. */
5579 /* TERMIOS is the latest and bestest, and seems most likely to
5580 work. If the system has it, use it. */
5583 cc_t
*sig_char
= NULL
;
5585 tcgetattr (XINT (p
->infd
), &t
);
5590 sig_char
= &t
.c_cc
[VINTR
];
5594 sig_char
= &t
.c_cc
[VQUIT
];
5598 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5599 sig_char
= &t
.c_cc
[VSWTCH
];
5601 sig_char
= &t
.c_cc
[VSUSP
];
5606 if (sig_char
&& *sig_char
!= CDISABLE
)
5608 send_process (proc
, sig_char
, 1, Qnil
);
5611 /* If we can't send the signal with a character,
5612 fall through and send it another way. */
5613 #else /* ! HAVE_TERMIOS */
5615 /* On Berkeley descendants, the following IOCTL's retrieve the
5616 current control characters. */
5617 #if defined (TIOCGLTC) && defined (TIOCGETC)
5625 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
5626 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
5629 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
5630 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
5634 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
5635 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
5637 #endif /* ! defined (SIGTSTP) */
5640 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
5642 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
5649 ioctl (XINT (p
->infd
), TCGETA
, &t
);
5650 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
5653 ioctl (XINT (p
->infd
), TCGETA
, &t
);
5654 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
5658 ioctl (XINT (p
->infd
), TCGETA
, &t
);
5659 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
5661 #endif /* ! defined (SIGTSTP) */
5663 #else /* ! defined (TCGETA) */
5664 Your configuration files are messed up
.
5665 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
5666 you'd better be using one of the alternatives above! */
5667 #endif /* ! defined (TCGETA) */
5668 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
5669 /* In this case, the code above should alway returns. */
5671 #endif /* ! defined HAVE_TERMIOS */
5673 /* The code above may fall through if it can't
5674 handle the signal. */
5675 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5678 /* Get the current pgrp using the tty itself, if we have that.
5679 Otherwise, use the pty to get the pgrp.
5680 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5681 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5682 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5683 His patch indicates that if TIOCGPGRP returns an error, then
5684 we should just assume that p->pid is also the process group id. */
5686 gid
= emacs_get_tty_pgrp (p
);
5689 /* If we can't get the information, assume
5690 the shell owns the tty. */
5691 gid
= XFASTINT (p
->pid
);
5693 /* It is not clear whether anything really can set GID to -1.
5694 Perhaps on some system one of those ioctls can or could do so.
5695 Or perhaps this is vestigial. */
5698 #else /* ! defined (TIOCGPGRP ) */
5699 /* Can't select pgrps on this system, so we know that
5700 the child itself heads the pgrp. */
5701 gid
= XFASTINT (p
->pid
);
5702 #endif /* ! defined (TIOCGPGRP ) */
5704 /* If current_group is lambda, and the shell owns the terminal,
5705 don't send any signal. */
5706 if (EQ (current_group
, Qlambda
) && gid
== XFASTINT (p
->pid
))
5714 p
->raw_status_low
= Qnil
;
5715 p
->raw_status_high
= Qnil
;
5717 XSETINT (p
->tick
, ++process_tick
);
5721 #endif /* ! defined (SIGCONT) */
5724 send_process (proc
, "\003", 1, Qnil
); /* ^C */
5729 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
5734 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
5737 flush_pending_output (XINT (p
->infd
));
5741 /* If we don't have process groups, send the signal to the immediate
5742 subprocess. That isn't really right, but it's better than any
5743 obvious alternative. */
5746 kill (XFASTINT (p
->pid
), signo
);
5750 /* gid may be a pid, or minus a pgrp's number */
5752 if (!NILP (current_group
))
5754 if (ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
) == -1)
5755 EMACS_KILLPG (gid
, signo
);
5759 gid
= - XFASTINT (p
->pid
);
5762 #else /* ! defined (TIOCSIGSEND) */
5763 EMACS_KILLPG (gid
, signo
);
5764 #endif /* ! defined (TIOCSIGSEND) */
5767 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
5768 doc
: /* Interrupt process PROCESS.
5769 PROCESS may be a process, a buffer, or the name of a process or buffer.
5770 No arg or nil means current buffer's process.
5771 Second arg CURRENT-GROUP non-nil means send signal to
5772 the current process-group of the process's controlling terminal
5773 rather than to the process's own process group.
5774 If the process is a shell, this means interrupt current subjob
5775 rather than the shell.
5777 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
5778 don't send the signal. */)
5779 (process
, current_group
)
5780 Lisp_Object process
, current_group
;
5782 process_send_signal (process
, SIGINT
, current_group
, 0);
5786 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
5787 doc
: /* Kill process PROCESS. May be process or name of one.
5788 See function `interrupt-process' for more details on usage. */)
5789 (process
, current_group
)
5790 Lisp_Object process
, current_group
;
5792 process_send_signal (process
, SIGKILL
, current_group
, 0);
5796 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
5797 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
5798 See function `interrupt-process' for more details on usage. */)
5799 (process
, current_group
)
5800 Lisp_Object process
, current_group
;
5802 process_send_signal (process
, SIGQUIT
, current_group
, 0);
5806 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
5807 doc
: /* Stop process PROCESS. May be process or name of one.
5808 See function `interrupt-process' for more details on usage.
5809 If PROCESS is a network process, inhibit handling of incoming traffic. */)
5810 (process
, current_group
)
5811 Lisp_Object process
, current_group
;
5814 if (PROCESSP (process
) && NETCONN_P (process
))
5816 struct Lisp_Process
*p
;
5818 p
= XPROCESS (process
);
5819 if (NILP (p
->command
)
5820 && XINT (p
->infd
) >= 0)
5822 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
5823 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
5830 error ("no SIGTSTP support");
5832 process_send_signal (process
, SIGTSTP
, current_group
, 0);
5837 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
5838 doc
: /* Continue process PROCESS. May be process or name of one.
5839 See function `interrupt-process' for more details on usage.
5840 If PROCESS is a network process, resume handling of incoming traffic. */)
5841 (process
, current_group
)
5842 Lisp_Object process
, current_group
;
5845 if (PROCESSP (process
) && NETCONN_P (process
))
5847 struct Lisp_Process
*p
;
5849 p
= XPROCESS (process
);
5850 if (EQ (p
->command
, Qt
)
5851 && XINT (p
->infd
) >= 0
5852 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
5854 FD_SET (XINT (p
->infd
), &input_wait_mask
);
5855 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
5862 process_send_signal (process
, SIGCONT
, current_group
, 0);
5864 error ("no SIGCONT support");
5869 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
5870 2, 2, "sProcess (name or number): \nnSignal code: ",
5871 doc
: /* Send PROCESS the signal with code SIGCODE.
5872 PROCESS may also be an integer specifying the process id of the
5873 process to signal; in this case, the process need not be a child of
5875 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
5877 Lisp_Object process
, sigcode
;
5881 if (INTEGERP (process
))
5887 if (STRINGP (process
))
5890 if (tem
= Fget_process (process
), NILP (tem
))
5892 pid
= Fstring_to_number (process
, make_number (10));
5893 if (XINT (pid
) != 0)
5899 process
= get_process (process
);
5904 CHECK_PROCESS (process
);
5905 pid
= XPROCESS (process
)->pid
;
5906 if (!INTEGERP (pid
) || XINT (pid
) <= 0)
5907 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
5911 #define handle_signal(NAME, VALUE) \
5912 else if (!strcmp (name, NAME)) \
5913 XSETINT (sigcode, VALUE)
5915 if (INTEGERP (sigcode
))
5919 unsigned char *name
;
5921 CHECK_SYMBOL (sigcode
);
5922 name
= SDATA (SYMBOL_NAME (sigcode
));
5927 handle_signal ("SIGHUP", SIGHUP
);
5930 handle_signal ("SIGINT", SIGINT
);
5933 handle_signal ("SIGQUIT", SIGQUIT
);
5936 handle_signal ("SIGILL", SIGILL
);
5939 handle_signal ("SIGABRT", SIGABRT
);
5942 handle_signal ("SIGEMT", SIGEMT
);
5945 handle_signal ("SIGKILL", SIGKILL
);
5948 handle_signal ("SIGFPE", SIGFPE
);
5951 handle_signal ("SIGBUS", SIGBUS
);
5954 handle_signal ("SIGSEGV", SIGSEGV
);
5957 handle_signal ("SIGSYS", SIGSYS
);
5960 handle_signal ("SIGPIPE", SIGPIPE
);
5963 handle_signal ("SIGALRM", SIGALRM
);
5966 handle_signal ("SIGTERM", SIGTERM
);
5969 handle_signal ("SIGURG", SIGURG
);
5972 handle_signal ("SIGSTOP", SIGSTOP
);
5975 handle_signal ("SIGTSTP", SIGTSTP
);
5978 handle_signal ("SIGCONT", SIGCONT
);
5981 handle_signal ("SIGCHLD", SIGCHLD
);
5984 handle_signal ("SIGTTIN", SIGTTIN
);
5987 handle_signal ("SIGTTOU", SIGTTOU
);
5990 handle_signal ("SIGIO", SIGIO
);
5993 handle_signal ("SIGXCPU", SIGXCPU
);
5996 handle_signal ("SIGXFSZ", SIGXFSZ
);
5999 handle_signal ("SIGVTALRM", SIGVTALRM
);
6002 handle_signal ("SIGPROF", SIGPROF
);
6005 handle_signal ("SIGWINCH", SIGWINCH
);
6008 handle_signal ("SIGINFO", SIGINFO
);
6011 handle_signal ("SIGUSR1", SIGUSR1
);
6014 handle_signal ("SIGUSR2", SIGUSR2
);
6017 error ("Undefined signal name %s", name
);
6020 #undef handle_signal
6022 return make_number (kill (XINT (pid
), XINT (sigcode
)));
6025 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6026 doc
: /* Make PROCESS see end-of-file in its input.
6027 EOF comes after any text already sent to it.
6028 PROCESS may be a process, a buffer, the name of a process or buffer, or
6029 nil, indicating the current buffer's process.
6030 If PROCESS is a network connection, or is a process communicating
6031 through a pipe (as opposed to a pty), then you cannot send any more
6032 text to PROCESS after you call this function. */)
6034 Lisp_Object process
;
6037 struct coding_system
*coding
;
6039 if (DATAGRAM_CONN_P (process
))
6042 proc
= get_process (process
);
6043 coding
= proc_encode_coding_system
[XINT (XPROCESS (proc
)->outfd
)];
6045 /* Make sure the process is really alive. */
6046 if (! NILP (XPROCESS (proc
)->raw_status_low
))
6047 update_status (XPROCESS (proc
));
6048 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6049 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6051 if (CODING_REQUIRE_FLUSHING (coding
))
6053 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6054 send_process (proc
, "", 0, Qnil
);
6058 send_process (proc
, "\032", 1, Qnil
); /* ^z */
6060 if (!NILP (XPROCESS (proc
)->pty_flag
))
6061 send_process (proc
, "\004", 1, Qnil
);
6064 int old_outfd
, new_outfd
;
6066 #ifdef HAVE_SHUTDOWN
6067 /* If this is a network connection, or socketpair is used
6068 for communication with the subprocess, call shutdown to cause EOF.
6069 (In some old system, shutdown to socketpair doesn't work.
6070 Then we just can't win.) */
6071 if (NILP (XPROCESS (proc
)->pid
)
6072 || XINT (XPROCESS (proc
)->outfd
) == XINT (XPROCESS (proc
)->infd
))
6073 shutdown (XINT (XPROCESS (proc
)->outfd
), 1);
6074 /* In case of socketpair, outfd == infd, so don't close it. */
6075 if (XINT (XPROCESS (proc
)->outfd
) != XINT (XPROCESS (proc
)->infd
))
6076 emacs_close (XINT (XPROCESS (proc
)->outfd
));
6077 #else /* not HAVE_SHUTDOWN */
6078 emacs_close (XINT (XPROCESS (proc
)->outfd
));
6079 #endif /* not HAVE_SHUTDOWN */
6080 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6081 old_outfd
= XINT (XPROCESS (proc
)->outfd
);
6083 if (!proc_encode_coding_system
[new_outfd
])
6084 proc_encode_coding_system
[new_outfd
]
6085 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6086 bcopy (proc_encode_coding_system
[old_outfd
],
6087 proc_encode_coding_system
[new_outfd
],
6088 sizeof (struct coding_system
));
6089 bzero (proc_encode_coding_system
[old_outfd
],
6090 sizeof (struct coding_system
));
6092 XSETINT (XPROCESS (proc
)->outfd
, new_outfd
);
6098 /* Kill all processes associated with `buffer'.
6099 If `buffer' is nil, kill all processes */
6102 kill_buffer_processes (buffer
)
6105 Lisp_Object tail
, proc
;
6107 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6109 proc
= XCDR (XCAR (tail
));
6110 if (GC_PROCESSP (proc
)
6111 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
6113 if (NETCONN_P (proc
))
6114 Fdelete_process (proc
);
6115 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
6116 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
6121 /* On receipt of a signal that a child status has changed, loop asking
6122 about children with changed statuses until the system says there
6125 All we do is change the status; we do not run sentinels or print
6126 notifications. That is saved for the next time keyboard input is
6127 done, in order to avoid timing errors.
6129 ** WARNING: this can be called during garbage collection.
6130 Therefore, it must not be fooled by the presence of mark bits in
6133 ** USG WARNING: Although it is not obvious from the documentation
6134 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6135 signal() before executing at least one wait(), otherwise the
6136 handler will be called again, resulting in an infinite loop. The
6137 relevant portion of the documentation reads "SIGCLD signals will be
6138 queued and the signal-catching function will be continually
6139 reentered until the queue is empty". Invoking signal() causes the
6140 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6143 ** Malloc WARNING: This should never call malloc either directly or
6144 indirectly; if it does, that is a bug */
6147 sigchld_handler (signo
)
6150 int old_errno
= errno
;
6152 register struct Lisp_Process
*p
;
6153 extern EMACS_TIME
*input_available_clear_time
;
6155 SIGNAL_THREAD_CHECK (signo
);
6159 sigheld
|= sigbit (SIGCHLD
);
6171 #endif /* no WUNTRACED */
6172 /* Keep trying to get a status until we get a definitive result. */
6176 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
6178 while (pid
< 0 && errno
== EINTR
);
6182 /* PID == 0 means no processes found, PID == -1 means a real
6183 failure. We have done all our job, so return. */
6185 /* USG systems forget handlers when they are used;
6186 must reestablish each time */
6187 #if defined (USG) && !defined (POSIX_SIGNALS)
6188 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
6191 sigheld
&= ~sigbit (SIGCHLD
);
6199 #endif /* no WNOHANG */
6201 /* Find the process that signaled us, and record its status. */
6204 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6206 proc
= XCDR (XCAR (tail
));
6207 p
= XPROCESS (proc
);
6208 if (GC_EQ (p
->childp
, Qt
) && XINT (p
->pid
) == pid
)
6213 /* Look for an asynchronous process whose pid hasn't been filled
6216 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6218 proc
= XCDR (XCAR (tail
));
6219 p
= XPROCESS (proc
);
6220 if (GC_INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
6225 /* Change the status of the process that was found. */
6228 union { int i
; WAITTYPE wt
; } u
;
6229 int clear_desc_flag
= 0;
6231 XSETINT (p
->tick
, ++process_tick
);
6233 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
6234 XSETINT (p
->raw_status_high
, u
.i
>> 16);
6236 /* If process has terminated, stop waiting for its output. */
6237 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6238 && XINT (p
->infd
) >= 0)
6239 clear_desc_flag
= 1;
6241 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6242 if (clear_desc_flag
)
6244 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
6245 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
6248 /* Tell wait_reading_process_output that it needs to wake up and
6250 if (input_available_clear_time
)
6251 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6254 /* There was no asynchronous process found for that id. Check
6255 if we have a synchronous process. */
6258 synch_process_alive
= 0;
6260 /* Report the status of the synchronous process. */
6262 synch_process_retcode
= WRETCODE (w
);
6263 else if (WIFSIGNALED (w
))
6264 synch_process_termsig
= WTERMSIG (w
);
6266 /* Tell wait_reading_process_output that it needs to wake up and
6268 if (input_available_clear_time
)
6269 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6272 /* On some systems, we must return right away.
6273 If any more processes want to signal us, we will
6275 Otherwise (on systems that have WNOHANG), loop around
6276 to use up all the processes that have something to tell us. */
6277 #if (defined WINDOWSNT \
6278 || (defined USG && !defined GNU_LINUX \
6279 && !(defined HPUX && defined WNOHANG)))
6280 #if defined (USG) && ! defined (POSIX_SIGNALS)
6281 signal (signo
, sigchld_handler
);
6285 #endif /* USG, but not HPUX with WNOHANG */
6291 exec_sentinel_unwind (data
)
6294 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
6299 exec_sentinel_error_handler (error
)
6302 cmd_error_internal (error
, "error in process sentinel: ");
6304 update_echo_area ();
6305 Fsleep_for (make_number (2), Qnil
);
6310 exec_sentinel (proc
, reason
)
6311 Lisp_Object proc
, reason
;
6313 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
6314 register struct Lisp_Process
*p
= XPROCESS (proc
);
6315 int count
= SPECPDL_INDEX ();
6316 int outer_running_asynch_code
= running_asynch_code
;
6317 int waiting
= waiting_for_user_input_p
;
6319 /* No need to gcpro these, because all we do with them later
6320 is test them for EQness, and none of them should be a string. */
6321 odeactivate
= Vdeactivate_mark
;
6322 XSETBUFFER (obuffer
, current_buffer
);
6323 okeymap
= current_buffer
->keymap
;
6325 sentinel
= p
->sentinel
;
6326 if (NILP (sentinel
))
6329 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6330 assure that it gets restored no matter how the sentinel exits. */
6332 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6333 /* Inhibit quit so that random quits don't screw up a running filter. */
6334 specbind (Qinhibit_quit
, Qt
);
6335 specbind (Qlast_nonmenu_event
, Qt
);
6337 /* In case we get recursively called,
6338 and we already saved the match data nonrecursively,
6339 save the same match data in safely recursive fashion. */
6340 if (outer_running_asynch_code
)
6343 tem
= Fmatch_data (Qnil
, Qnil
);
6344 restore_match_data ();
6345 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
6346 Fset_match_data (tem
);
6349 /* For speed, if a search happens within this code,
6350 save the match data in a special nonrecursive fashion. */
6351 running_asynch_code
= 1;
6353 internal_condition_case_1 (read_process_output_call
,
6355 Fcons (proc
, Fcons (reason
, Qnil
))),
6356 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6357 exec_sentinel_error_handler
);
6359 /* If we saved the match data nonrecursively, restore it now. */
6360 restore_match_data ();
6361 running_asynch_code
= outer_running_asynch_code
;
6363 Vdeactivate_mark
= odeactivate
;
6365 /* Restore waiting_for_user_input_p as it was
6366 when we were called, in case the filter clobbered it. */
6367 waiting_for_user_input_p
= waiting
;
6370 if (! EQ (Fcurrent_buffer (), obuffer
)
6371 || ! EQ (current_buffer
->keymap
, okeymap
))
6373 /* But do it only if the caller is actually going to read events.
6374 Otherwise there's no need to make him wake up, and it could
6375 cause trouble (for example it would make Fsit_for return). */
6376 if (waiting_for_user_input_p
== -1)
6377 record_asynch_buffer_change ();
6379 unbind_to (count
, Qnil
);
6382 /* Report all recent events of a change in process status
6383 (either run the sentinel or output a message).
6384 This is usually done while Emacs is waiting for keyboard input
6385 but can be done at other times. */
6390 register Lisp_Object proc
, buffer
;
6391 Lisp_Object tail
, msg
;
6392 struct gcpro gcpro1
, gcpro2
;
6396 /* We need to gcpro tail; if read_process_output calls a filter
6397 which deletes a process and removes the cons to which tail points
6398 from Vprocess_alist, and then causes a GC, tail is an unprotected
6402 /* Set this now, so that if new processes are created by sentinels
6403 that we run, we get called again to handle their status changes. */
6404 update_tick
= process_tick
;
6406 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
6409 register struct Lisp_Process
*p
;
6411 proc
= Fcdr (Fcar (tail
));
6412 p
= XPROCESS (proc
);
6414 if (XINT (p
->tick
) != XINT (p
->update_tick
))
6416 XSETINT (p
->update_tick
, XINT (p
->tick
));
6418 /* If process is still active, read any output that remains. */
6419 while (! EQ (p
->filter
, Qt
)
6420 && ! EQ (p
->status
, Qconnect
)
6421 && ! EQ (p
->status
, Qlisten
)
6422 && ! EQ (p
->command
, Qt
) /* Network process not stopped. */
6423 && XINT (p
->infd
) >= 0
6424 && read_process_output (proc
, XINT (p
->infd
)) > 0);
6428 /* Get the text to use for the message. */
6429 if (!NILP (p
->raw_status_low
))
6431 msg
= status_message (p
);
6433 /* If process is terminated, deactivate it or delete it. */
6435 if (CONSP (p
->status
))
6436 symbol
= XCAR (p
->status
);
6438 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6439 || EQ (symbol
, Qclosed
))
6441 if (delete_exited_processes
)
6442 remove_process (proc
);
6444 deactivate_process (proc
);
6447 /* The actions above may have further incremented p->tick.
6448 So set p->update_tick again
6449 so that an error in the sentinel will not cause
6450 this code to be run again. */
6451 XSETINT (p
->update_tick
, XINT (p
->tick
));
6452 /* Now output the message suitably. */
6453 if (!NILP (p
->sentinel
))
6454 exec_sentinel (proc
, msg
);
6455 /* Don't bother with a message in the buffer
6456 when a process becomes runnable. */
6457 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6459 Lisp_Object ro
, tem
;
6460 struct buffer
*old
= current_buffer
;
6461 int opoint
, opoint_byte
;
6462 int before
, before_byte
;
6464 ro
= XBUFFER (buffer
)->read_only
;
6466 /* Avoid error if buffer is deleted
6467 (probably that's why the process is dead, too) */
6468 if (NILP (XBUFFER (buffer
)->name
))
6470 Fset_buffer (buffer
);
6473 opoint_byte
= PT_BYTE
;
6474 /* Insert new output into buffer
6475 at the current end-of-output marker,
6476 thus preserving logical ordering of input and output. */
6477 if (XMARKER (p
->mark
)->buffer
)
6478 Fgoto_char (p
->mark
);
6480 SET_PT_BOTH (ZV
, ZV_BYTE
);
6483 before_byte
= PT_BYTE
;
6485 tem
= current_buffer
->read_only
;
6486 current_buffer
->read_only
= Qnil
;
6487 insert_string ("\nProcess ");
6488 Finsert (1, &p
->name
);
6489 insert_string (" ");
6491 current_buffer
->read_only
= tem
;
6492 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6494 if (opoint
>= before
)
6495 SET_PT_BOTH (opoint
+ (PT
- before
),
6496 opoint_byte
+ (PT_BYTE
- before_byte
));
6498 SET_PT_BOTH (opoint
, opoint_byte
);
6500 set_buffer_internal (old
);
6505 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6506 redisplay_preserve_echo_area (13);
6512 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6513 Sset_process_coding_system
, 1, 3, 0,
6514 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6515 DECODING will be used to decode subprocess output and ENCODING to
6516 encode subprocess input. */)
6517 (process
, decoding
, encoding
)
6518 register Lisp_Object process
, decoding
, encoding
;
6520 register struct Lisp_Process
*p
;
6522 CHECK_PROCESS (process
);
6523 p
= XPROCESS (process
);
6524 if (XINT (p
->infd
) < 0)
6525 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6526 if (XINT (p
->outfd
) < 0)
6527 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6528 Fcheck_coding_system (decoding
);
6529 Fcheck_coding_system (encoding
);
6531 p
->decode_coding_system
= decoding
;
6532 p
->encode_coding_system
= encoding
;
6533 setup_process_coding_systems (process
);
6538 DEFUN ("process-coding-system",
6539 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6540 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6542 register Lisp_Object process
;
6544 CHECK_PROCESS (process
);
6545 return Fcons (XPROCESS (process
)->decode_coding_system
,
6546 XPROCESS (process
)->encode_coding_system
);
6549 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6550 Sset_process_filter_multibyte
, 2, 2, 0,
6551 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6552 If FLAG is non-nil, the filter is given multibyte strings.
6553 If FLAG is nil, the filter is given unibyte strings. In this case,
6554 all character code conversion except for end-of-line conversion is
6557 Lisp_Object process
, flag
;
6559 register struct Lisp_Process
*p
;
6561 CHECK_PROCESS (process
);
6562 p
= XPROCESS (process
);
6563 p
->filter_multibyte
= flag
;
6564 setup_process_coding_systems (process
);
6569 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6570 Sprocess_filter_multibyte_p
, 1, 1, 0,
6571 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6573 Lisp_Object process
;
6575 register struct Lisp_Process
*p
;
6577 CHECK_PROCESS (process
);
6578 p
= XPROCESS (process
);
6580 return (NILP (p
->filter_multibyte
) ? Qnil
: Qt
);
6585 /* The first time this is called, assume keyboard input comes from DESC
6586 instead of from where we used to expect it.
6587 Subsequent calls mean assume input keyboard can come from DESC
6588 in addition to other places. */
6590 static int add_keyboard_wait_descriptor_called_flag
;
6593 add_keyboard_wait_descriptor (desc
)
6596 if (! add_keyboard_wait_descriptor_called_flag
)
6597 FD_CLR (0, &input_wait_mask
);
6598 add_keyboard_wait_descriptor_called_flag
= 1;
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 FD_SET (0, &input_wait_mask
);
6670 Vprocess_alist
= Qnil
;
6671 for (i
= 0; i
< MAXDESC
; i
++)
6673 chan_process
[i
] = Qnil
;
6674 proc_buffered_char
[i
] = -1;
6676 bzero (proc_decode_coding_system
, sizeof proc_decode_coding_system
);
6677 bzero (proc_encode_coding_system
, sizeof proc_encode_coding_system
);
6678 #ifdef DATAGRAM_SOCKETS
6679 bzero (datagram_address
, sizeof datagram_address
);
6684 Lisp_Object subfeatures
= Qnil
;
6685 struct socket_options
*sopt
;
6687 #define ADD_SUBFEATURE(key, val) \
6688 subfeatures = Fcons (Fcons (key, Fcons (val, Qnil)), subfeatures)
6690 #ifdef NON_BLOCKING_CONNECT
6691 ADD_SUBFEATURE (QCnowait
, Qt
);
6693 #ifdef DATAGRAM_SOCKETS
6694 ADD_SUBFEATURE (QCtype
, Qdatagram
);
6696 #ifdef HAVE_LOCAL_SOCKETS
6697 ADD_SUBFEATURE (QCfamily
, Qlocal
);
6699 #ifdef HAVE_GETSOCKNAME
6700 ADD_SUBFEATURE (QCservice
, Qt
);
6702 #if !defined(TERM) && (defined(O_NONBLOCK) || defined(O_NDELAY))
6703 ADD_SUBFEATURE (QCserver
, Qt
);
6706 for (sopt
= socket_options
; sopt
->name
; sopt
++)
6707 subfeatures
= Fcons (intern (sopt
->name
), subfeatures
);
6709 Fprovide (intern ("make-network-process"), subfeatures
);
6711 #endif /* HAVE_SOCKETS */
6713 #if defined (DARWIN) || defined (MAC_OSX)
6714 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
6715 processes. As such, we only change the default value. */
6718 char *release
= get_operating_system_release();
6719 if (!release
|| !release
[0] || (release
[0] < MIN_PTY_KERNEL_VERSION
6720 && release
[1] == '.')) {
6721 Vprocess_connection_type
= Qnil
;
6730 Qprocessp
= intern ("processp");
6731 staticpro (&Qprocessp
);
6732 Qrun
= intern ("run");
6734 Qstop
= intern ("stop");
6736 Qsignal
= intern ("signal");
6737 staticpro (&Qsignal
);
6739 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
6742 Qexit = intern ("exit");
6743 staticpro (&Qexit); */
6745 Qopen
= intern ("open");
6747 Qclosed
= intern ("closed");
6748 staticpro (&Qclosed
);
6749 Qconnect
= intern ("connect");
6750 staticpro (&Qconnect
);
6751 Qfailed
= intern ("failed");
6752 staticpro (&Qfailed
);
6753 Qlisten
= intern ("listen");
6754 staticpro (&Qlisten
);
6755 Qlocal
= intern ("local");
6756 staticpro (&Qlocal
);
6757 Qdatagram
= intern ("datagram");
6758 staticpro (&Qdatagram
);
6760 QCname
= intern (":name");
6761 staticpro (&QCname
);
6762 QCbuffer
= intern (":buffer");
6763 staticpro (&QCbuffer
);
6764 QChost
= intern (":host");
6765 staticpro (&QChost
);
6766 QCservice
= intern (":service");
6767 staticpro (&QCservice
);
6768 QCtype
= intern (":type");
6769 staticpro (&QCtype
);
6770 QClocal
= intern (":local");
6771 staticpro (&QClocal
);
6772 QCremote
= intern (":remote");
6773 staticpro (&QCremote
);
6774 QCcoding
= intern (":coding");
6775 staticpro (&QCcoding
);
6776 QCserver
= intern (":server");
6777 staticpro (&QCserver
);
6778 QCnowait
= intern (":nowait");
6779 staticpro (&QCnowait
);
6780 QCsentinel
= intern (":sentinel");
6781 staticpro (&QCsentinel
);
6782 QClog
= intern (":log");
6784 QCnoquery
= intern (":noquery");
6785 staticpro (&QCnoquery
);
6786 QCstop
= intern (":stop");
6787 staticpro (&QCstop
);
6788 QCoptions
= intern (":options");
6789 staticpro (&QCoptions
);
6790 QCplist
= intern (":plist");
6791 staticpro (&QCplist
);
6792 QCfilter_multibyte
= intern (":filter-multibyte");
6793 staticpro (&QCfilter_multibyte
);
6795 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
6796 staticpro (&Qlast_nonmenu_event
);
6798 staticpro (&Vprocess_alist
);
6800 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
6801 doc
: /* *Non-nil means delete processes immediately when they exit.
6802 nil means don't delete them until `list-processes' is run. */);
6804 delete_exited_processes
= 1;
6806 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
6807 doc
: /* Control type of device used to communicate with subprocesses.
6808 Values are nil to use a pipe, or t or `pty' to use a pty.
6809 The value has no effect if the system has no ptys or if all ptys are busy:
6810 then a pipe is used in any case.
6811 The value takes effect when `start-process' is called. */);
6812 Vprocess_connection_type
= Qt
;
6814 #ifdef ADAPTIVE_READ_BUFFERING
6815 DEFVAR_LISP ("process-adaptive-read-buffering", &Vprocess_adaptive_read_buffering
,
6816 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
6817 On some systems, when Emacs reads the output from a subprocess, the output data
6818 is read in very small blocks, potentially resulting in very poor performance.
6819 This behaviour can be remedied to some extent by setting this variable to a
6820 non-nil value, as it will automatically delay reading from such processes, to
6821 allowing them to produce more output before Emacs tries to read it.
6822 If the value is t, the delay is reset after each write to the process; any other
6823 non-nil value means that the delay is not reset on write.
6824 The variable takes effect when `start-process' is called. */);
6825 Vprocess_adaptive_read_buffering
= Qt
;
6828 defsubr (&Sprocessp
);
6829 defsubr (&Sget_process
);
6830 defsubr (&Sget_buffer_process
);
6831 defsubr (&Sdelete_process
);
6832 defsubr (&Sprocess_status
);
6833 defsubr (&Sprocess_exit_status
);
6834 defsubr (&Sprocess_id
);
6835 defsubr (&Sprocess_name
);
6836 defsubr (&Sprocess_tty_name
);
6837 defsubr (&Sprocess_command
);
6838 defsubr (&Sset_process_buffer
);
6839 defsubr (&Sprocess_buffer
);
6840 defsubr (&Sprocess_mark
);
6841 defsubr (&Sset_process_filter
);
6842 defsubr (&Sprocess_filter
);
6843 defsubr (&Sset_process_sentinel
);
6844 defsubr (&Sprocess_sentinel
);
6845 defsubr (&Sset_process_window_size
);
6846 defsubr (&Sset_process_inherit_coding_system_flag
);
6847 defsubr (&Sprocess_inherit_coding_system_flag
);
6848 defsubr (&Sset_process_query_on_exit_flag
);
6849 defsubr (&Sprocess_query_on_exit_flag
);
6850 defsubr (&Sprocess_contact
);
6851 defsubr (&Sprocess_plist
);
6852 defsubr (&Sset_process_plist
);
6853 defsubr (&Slist_processes
);
6854 defsubr (&Sprocess_list
);
6855 defsubr (&Sstart_process
);
6857 defsubr (&Sset_network_process_option
);
6858 defsubr (&Smake_network_process
);
6859 defsubr (&Sformat_network_address
);
6860 #endif /* HAVE_SOCKETS */
6861 #if defined(HAVE_SOCKETS) && defined(HAVE_NET_IF_H) && defined(HAVE_SYS_IOCTL_H)
6863 defsubr (&Snetwork_interface_list
);
6865 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
6866 defsubr (&Snetwork_interface_info
);
6868 #endif /* HAVE_SOCKETS ... */
6869 #ifdef DATAGRAM_SOCKETS
6870 defsubr (&Sprocess_datagram_address
);
6871 defsubr (&Sset_process_datagram_address
);
6873 defsubr (&Saccept_process_output
);
6874 defsubr (&Sprocess_send_region
);
6875 defsubr (&Sprocess_send_string
);
6876 defsubr (&Sinterrupt_process
);
6877 defsubr (&Skill_process
);
6878 defsubr (&Squit_process
);
6879 defsubr (&Sstop_process
);
6880 defsubr (&Scontinue_process
);
6881 defsubr (&Sprocess_running_child_p
);
6882 defsubr (&Sprocess_send_eof
);
6883 defsubr (&Ssignal_process
);
6884 defsubr (&Swaiting_for_user_input_p
);
6885 /* defsubr (&Sprocess_connection); */
6886 defsubr (&Sset_process_coding_system
);
6887 defsubr (&Sprocess_coding_system
);
6888 defsubr (&Sset_process_filter_multibyte
);
6889 defsubr (&Sprocess_filter_multibyte_p
);
6893 #else /* not subprocesses */
6895 #include <sys/types.h>
6899 #include "systime.h"
6900 #include "charset.h"
6902 #include "termopts.h"
6903 #include "sysselect.h"
6905 extern int frame_garbaged
;
6907 extern EMACS_TIME
timer_check ();
6908 extern int timers_run
;
6912 /* As described above, except assuming that there are no subprocesses:
6914 Wait for timeout to elapse and/or keyboard input to be available.
6917 timeout in seconds, or
6918 zero for no limit, or
6919 -1 means gobble data immediately available but don't wait for any.
6921 read_kbd is a Lisp_Object:
6922 0 to ignore keyboard input, or
6923 1 to return when input is available, or
6924 -1 means caller will actually read the input, so don't throw to
6927 see full version for other parameters. We know that wait_proc will
6928 always be NULL, since `subprocesses' isn't defined.
6930 do_display != 0 means redisplay should be done to show subprocess
6931 output that arrives.
6933 Return true iff we received input from any process. */
6936 wait_reading_process_output (time_limit
, microsecs
, read_kbd
, do_display
,
6937 wait_for_cell
, wait_proc
, just_wait_proc
)
6938 int time_limit
, microsecs
, read_kbd
, do_display
;
6939 Lisp_Object wait_for_cell
;
6940 struct Lisp_Process
*wait_proc
;
6944 EMACS_TIME end_time
, timeout
;
6945 SELECT_TYPE waitchannels
;
6948 /* What does time_limit really mean? */
6949 if (time_limit
|| microsecs
)
6951 EMACS_GET_TIME (end_time
);
6952 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
6953 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6956 /* Turn off periodic alarms (in case they are in use)
6957 and then turn off any other atimers,
6958 because the select emulator uses alarms. */
6960 turn_on_atimers (0);
6964 int timeout_reduced_for_timers
= 0;
6966 /* If calling from keyboard input, do not quit
6967 since we want to return C-g as an input character.
6968 Otherwise, do pending quit if requested. */
6972 /* Exit now if the cell we're waiting for became non-nil. */
6973 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6976 /* Compute time from now till when time limit is up */
6977 /* Exit if already run out */
6978 if (time_limit
== -1)
6980 /* -1 specified for timeout means
6981 gobble output available now
6982 but don't wait at all. */
6984 EMACS_SET_SECS_USECS (timeout
, 0, 0);
6986 else if (time_limit
|| microsecs
)
6988 EMACS_GET_TIME (timeout
);
6989 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6990 if (EMACS_TIME_NEG_P (timeout
))
6995 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
6998 /* If our caller will not immediately handle keyboard events,
6999 run timer events directly.
7000 (Callers that will immediately read keyboard events
7001 call timer_delay on their own.) */
7002 if (NILP (wait_for_cell
))
7004 EMACS_TIME timer_delay
;
7008 int old_timers_run
= timers_run
;
7009 timer_delay
= timer_check (1);
7010 if (timers_run
!= old_timers_run
&& do_display
)
7011 /* We must retry, since a timer may have requeued itself
7012 and that could alter the time delay. */
7013 redisplay_preserve_echo_area (14);
7017 while (!detect_input_pending ());
7019 /* If there is unread keyboard input, also return. */
7021 && requeued_events_pending_p ())
7024 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
7026 EMACS_TIME difference
;
7027 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
7028 if (EMACS_TIME_NEG_P (difference
))
7030 timeout
= timer_delay
;
7031 timeout_reduced_for_timers
= 1;
7036 /* Cause C-g and alarm signals to take immediate action,
7037 and cause input available signals to zero out timeout. */
7039 set_waiting_for_input (&timeout
);
7041 /* Wait till there is something to do. */
7043 if (! read_kbd
&& NILP (wait_for_cell
))
7044 FD_ZERO (&waitchannels
);
7046 FD_SET (0, &waitchannels
);
7048 /* If a frame has been newly mapped and needs updating,
7049 reprocess its display stuff. */
7050 if (frame_garbaged
&& do_display
)
7052 clear_waiting_for_input ();
7053 redisplay_preserve_echo_area (15);
7055 set_waiting_for_input (&timeout
);
7058 if (read_kbd
&& detect_input_pending ())
7061 FD_ZERO (&waitchannels
);
7064 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
7069 /* Make C-g and alarm signals set flags again */
7070 clear_waiting_for_input ();
7072 /* If we woke up due to SIGWINCH, actually change size now. */
7073 do_pending_window_change (0);
7075 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
7076 /* We waited the full specified time, so return now. */
7081 /* If the system call was interrupted, then go around the
7083 if (xerrno
== EINTR
)
7084 FD_ZERO (&waitchannels
);
7086 error ("select error: %s", emacs_strerror (xerrno
));
7089 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
7090 /* System sometimes fails to deliver SIGIO. */
7091 kill (getpid (), SIGIO
);
7094 if (read_kbd
&& interrupt_input
&& (waitchannels
& 1))
7095 kill (getpid (), SIGIO
);
7098 /* Check for keyboard input */
7101 && detect_input_pending_run_timers (do_display
))
7103 swallow_events (do_display
);
7104 if (detect_input_pending_run_timers (do_display
))
7108 /* If there is unread keyboard input, also return. */
7110 && requeued_events_pending_p ())
7113 /* If wait_for_cell. check for keyboard input
7114 but don't run any timers.
7115 ??? (It seems wrong to me to check for keyboard
7116 input at all when wait_for_cell, but the code
7117 has been this way since July 1994.
7118 Try changing this after version 19.31.) */
7119 if (! NILP (wait_for_cell
)
7120 && detect_input_pending ())
7122 swallow_events (do_display
);
7123 if (detect_input_pending ())
7127 /* Exit now if the cell we're waiting for became non-nil. */
7128 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7138 /* Don't confuse make-docfile by having two doc strings for this function.
7139 make-docfile does not pay attention to #if, for good reason! */
7140 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7143 register Lisp_Object name
;
7148 /* Don't confuse make-docfile by having two doc strings for this function.
7149 make-docfile does not pay attention to #if, for good reason! */
7150 DEFUN ("process-inherit-coding-system-flag",
7151 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7155 register Lisp_Object process
;
7157 /* Ignore the argument and return the value of
7158 inherit-process-coding-system. */
7159 return inherit_process_coding_system
? Qt
: Qnil
;
7162 /* Kill all processes associated with `buffer'.
7163 If `buffer' is nil, kill all processes.
7164 Since we have no subprocesses, this does nothing. */
7167 kill_buffer_processes (buffer
)
7180 QCtype
= intern (":type");
7181 staticpro (&QCtype
);
7183 defsubr (&Sget_buffer_process
);
7184 defsubr (&Sprocess_inherit_coding_system_flag
);
7188 #endif /* not subprocesses */
7190 /* arch-tag: 3706c011-7b9a-4117-bd4f-59e7f701a4c4
7191 (do not change this comment) */