1 /* Asynchronous subprocess control for GNU Emacs.
2 Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995,
3 1996, 1998, 1999, 2001, 2002, 2003, 2004,
4 2005 Free Software Foundation, Inc.
6 This file is part of GNU Emacs.
8 GNU Emacs is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs; see the file COPYING. If not, write to
20 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 Boston, MA 02110-1301, USA. */
27 /* This file is split into two parts by the following preprocessor
28 conditional. The 'then' clause contains all of the support for
29 asynchronous subprocesses. The 'else' clause contains stub
30 versions of some of the asynchronous subprocess routines that are
31 often called elsewhere in Emacs, so we don't have to #ifdef the
32 sections that call them. */
40 #include <sys/types.h> /* some typedefs are used in sys/file.h */
47 #if defined(WINDOWSNT) || defined(UNIX98_PTYS)
50 #endif /* not WINDOWSNT */
52 #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */
53 #include <sys/socket.h>
55 #include <netinet/in.h>
56 #include <arpa/inet.h>
57 #ifdef NEED_NET_ERRNO_H
58 #include <net/errno.h>
59 #endif /* NEED_NET_ERRNO_H */
61 /* Are local (unix) sockets supported? */
62 #if defined (HAVE_SYS_UN_H) && !defined (NO_SOCKETS_IN_FILE_SYSTEM)
63 #if !defined (AF_LOCAL) && defined (AF_UNIX)
64 #define AF_LOCAL AF_UNIX
67 #define HAVE_LOCAL_SOCKETS
71 #endif /* HAVE_SOCKETS */
73 /* TERM is a poor-man's SLIP, used on GNU/Linux. */
78 /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */
79 #ifdef HAVE_BROKEN_INET_ADDR
80 #define IN_ADDR struct in_addr
81 #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1)
83 #define IN_ADDR unsigned long
84 #define NUMERIC_ADDR_ERROR (numeric_addr == -1)
87 #if defined(BSD_SYSTEM) || defined(STRIDE)
88 #include <sys/ioctl.h>
89 #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5)
91 #endif /* HAVE_PTYS and no O_NDELAY */
92 #endif /* BSD_SYSTEM || STRIDE */
94 #ifdef BROKEN_O_NONBLOCK
96 #endif /* BROKEN_O_NONBLOCK */
102 /* Can we use SIOCGIFCONF and/or SIOCGIFADDR */
104 #if defined(HAVE_SYS_IOCTL_H) && defined(HAVE_NET_IF_H)
105 /* sys/ioctl.h may have been included already */
107 #include <sys/ioctl.h>
114 #include <sys/sysmacros.h> /* for "minor" */
115 #endif /* not IRIS */
118 #include <sys/wait.h>
130 #include "termhooks.h"
131 #include "termopts.h"
132 #include "commands.h"
133 #include "keyboard.h"
135 #include "blockinput.h"
136 #include "dispextern.h"
137 #include "composite.h"
140 Lisp_Object Qprocessp
;
141 Lisp_Object Qrun
, Qstop
, Qsignal
;
142 Lisp_Object Qopen
, Qclosed
, Qconnect
, Qfailed
, Qlisten
;
143 Lisp_Object Qlocal
, Qdatagram
;
144 Lisp_Object QCname
, QCbuffer
, QChost
, QCservice
, QCtype
;
145 Lisp_Object QClocal
, QCremote
, QCcoding
;
146 Lisp_Object QCserver
, QCnowait
, QCnoquery
, QCstop
;
147 Lisp_Object QCsentinel
, QClog
, QCoptions
, QCplist
;
148 Lisp_Object QCfilter_multibyte
;
149 Lisp_Object Qlast_nonmenu_event
;
150 /* QCfamily is declared and initialized in xfaces.c,
151 QCfilter in keyboard.c. */
152 extern Lisp_Object QCfamily
, QCfilter
;
154 /* Qexit is declared and initialized in eval.c. */
156 /* QCfamily is defined in xfaces.c. */
157 extern Lisp_Object QCfamily
;
158 /* QCfilter is defined in keyboard.c. */
159 extern Lisp_Object QCfilter
;
161 /* a process object is a network connection when its childp field is neither
162 Qt nor Qnil but is instead a property list (KEY VAL ...). */
165 #define NETCONN_P(p) (GC_CONSP (XPROCESS (p)->childp))
166 #define NETCONN1_P(p) (GC_CONSP ((p)->childp))
168 #define NETCONN_P(p) 0
169 #define NETCONN1_P(p) 0
170 #endif /* HAVE_SOCKETS */
172 /* Define first descriptor number available for subprocesses. */
174 #define FIRST_PROC_DESC 1
176 #define FIRST_PROC_DESC 3
179 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
182 #if !defined (SIGCHLD) && defined (SIGCLD)
183 #define SIGCHLD SIGCLD
186 #include "syssignal.h"
190 extern void set_waiting_for_input
P_ ((EMACS_TIME
*));
191 extern char *get_operating_system_release ();
197 extern char *sys_errlist
[];
204 /* t means use pty, nil means use a pipe,
205 maybe other values to come. */
206 static Lisp_Object Vprocess_connection_type
;
210 #include <sys/socket.h>
214 /* These next two vars are non-static since sysdep.c uses them in the
215 emulation of `select'. */
216 /* Number of events of change of status of a process. */
218 /* Number of events for which the user or sentinel has been notified. */
221 /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */
223 #ifdef BROKEN_NON_BLOCKING_CONNECT
224 #undef NON_BLOCKING_CONNECT
226 #ifndef NON_BLOCKING_CONNECT
229 #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX)
230 #if defined (O_NONBLOCK) || defined (O_NDELAY)
231 #if defined (EWOULDBLOCK) || defined (EINPROGRESS)
232 #define NON_BLOCKING_CONNECT
233 #endif /* EWOULDBLOCK || EINPROGRESS */
234 #endif /* O_NONBLOCK || O_NDELAY */
235 #endif /* HAVE_GETPEERNAME || GNU_LINUX */
236 #endif /* HAVE_SELECT */
237 #endif /* HAVE_SOCKETS */
238 #endif /* NON_BLOCKING_CONNECT */
239 #endif /* BROKEN_NON_BLOCKING_CONNECT */
241 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
242 this system. We need to read full packets, so we need a
243 "non-destructive" select. So we require either native select,
244 or emulation of select using FIONREAD. */
246 #ifdef BROKEN_DATAGRAM_SOCKETS
247 #undef DATAGRAM_SOCKETS
249 #ifndef DATAGRAM_SOCKETS
251 #if defined (HAVE_SELECT) || defined (FIONREAD)
252 #if defined (HAVE_SENDTO) && defined (HAVE_RECVFROM) && defined (EMSGSIZE)
253 #define DATAGRAM_SOCKETS
254 #endif /* HAVE_SENDTO && HAVE_RECVFROM && EMSGSIZE */
255 #endif /* HAVE_SELECT || FIONREAD */
256 #endif /* HAVE_SOCKETS */
257 #endif /* DATAGRAM_SOCKETS */
258 #endif /* BROKEN_DATAGRAM_SOCKETS */
261 #undef NON_BLOCKING_CONNECT
262 #undef DATAGRAM_SOCKETS
265 #if !defined (ADAPTIVE_READ_BUFFERING) && !defined (NO_ADAPTIVE_READ_BUFFERING)
266 #ifdef EMACS_HAS_USECS
267 #define ADAPTIVE_READ_BUFFERING
271 #ifdef ADAPTIVE_READ_BUFFERING
272 #define READ_OUTPUT_DELAY_INCREMENT 10000
273 #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5)
274 #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7)
276 /* Number of processes which have a non-zero read_output_delay,
277 and therefore might be delayed for adaptive read buffering. */
279 static int process_output_delay_count
;
281 /* Non-zero if any process has non-nil read_output_skip. */
283 static int process_output_skip
;
285 /* Non-nil means to delay reading process output to improve buffering.
286 A value of t means that delay is reset after each send, any other
287 non-nil value does not reset the delay. A value of nil disables
288 adaptive read buffering completely. */
289 static Lisp_Object Vprocess_adaptive_read_buffering
;
291 #define process_output_delay_count 0
295 #include "sysselect.h"
297 static int keyboard_bit_set
P_ ((SELECT_TYPE
*));
298 static void deactivate_process
P_ ((Lisp_Object
));
299 static void status_notify
P_ ((struct Lisp_Process
*));
300 static int read_process_output
P_ ((Lisp_Object
, int));
302 /* If we support a window system, turn on the code to poll periodically
303 to detect C-g. It isn't actually used when doing interrupt input. */
304 #ifdef HAVE_WINDOW_SYSTEM
305 #define POLL_FOR_INPUT
308 /* Mask of bits indicating the descriptors that we wait for input on. */
310 static SELECT_TYPE input_wait_mask
;
312 /* Mask that excludes keyboard input descriptor (s). */
314 static SELECT_TYPE non_keyboard_wait_mask
;
316 /* Mask that excludes process input descriptor (s). */
318 static SELECT_TYPE non_process_wait_mask
;
320 #ifdef NON_BLOCKING_CONNECT
321 /* Mask of bits indicating the descriptors that we wait for connect to
322 complete on. Once they complete, they are removed from this mask
323 and added to the input_wait_mask and non_keyboard_wait_mask. */
325 static SELECT_TYPE connect_wait_mask
;
327 /* Number of bits set in connect_wait_mask. */
328 static int num_pending_connects
;
330 #define IF_NON_BLOCKING_CONNECT(s) s
332 #define IF_NON_BLOCKING_CONNECT(s)
335 /* The largest descriptor currently in use for a process object. */
336 static int max_process_desc
;
338 /* The largest descriptor currently in use for keyboard input. */
339 static int max_keyboard_desc
;
341 /* Nonzero means delete a process right away if it exits. */
342 static int delete_exited_processes
;
344 /* Indexed by descriptor, gives the process (if any) for that descriptor */
345 Lisp_Object chan_process
[MAXDESC
];
347 /* Alist of elements (NAME . PROCESS) */
348 Lisp_Object Vprocess_alist
;
350 /* Buffered-ahead input char from process, indexed by channel.
351 -1 means empty (no char is buffered).
352 Used on sys V where the only way to tell if there is any
353 output from the process is to read at least one char.
354 Always -1 on systems that support FIONREAD. */
356 /* Don't make static; need to access externally. */
357 int proc_buffered_char
[MAXDESC
];
359 /* Table of `struct coding-system' for each process. */
360 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
361 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
363 #ifdef DATAGRAM_SOCKETS
364 /* Table of `partner address' for datagram sockets. */
365 struct sockaddr_and_len
{
368 } datagram_address
[MAXDESC
];
369 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
370 #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XINT (XPROCESS (proc)->infd)].sa != 0)
372 #define DATAGRAM_CHAN_P(chan) (0)
373 #define DATAGRAM_CONN_P(proc) (0)
376 static Lisp_Object
get_process ();
377 static void exec_sentinel ();
379 extern EMACS_TIME
timer_check ();
380 extern int timers_run
;
382 /* Maximum number of bytes to send to a pty without an eof. */
383 static int pty_max_bytes
;
389 /* The file name of the pty opened by allocate_pty. */
391 static char pty_name
[24];
394 /* Compute the Lisp form of the process status, p->status, from
395 the numeric status that was returned by `wait'. */
397 static Lisp_Object
status_convert ();
401 struct Lisp_Process
*p
;
403 union { int i
; WAITTYPE wt
; } u
;
404 u
.i
= XFASTINT (p
->raw_status_low
) + (XFASTINT (p
->raw_status_high
) << 16);
405 p
->status
= status_convert (u
.wt
);
406 p
->raw_status_low
= Qnil
;
407 p
->raw_status_high
= Qnil
;
410 /* Convert a process status word in Unix format to
411 the list that we use internally. */
418 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
419 else if (WIFEXITED (w
))
420 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
421 WCOREDUMP (w
) ? Qt
: Qnil
));
422 else if (WIFSIGNALED (w
))
423 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
424 WCOREDUMP (w
) ? Qt
: Qnil
));
429 /* Given a status-list, extract the three pieces of information
430 and store them individually through the three pointers. */
433 decode_status (l
, symbol
, code
, coredump
)
451 *code
= XFASTINT (XCAR (tem
));
453 *coredump
= !NILP (tem
);
457 /* Return a string describing a process status list. */
461 struct Lisp_Process
*p
;
463 Lisp_Object status
= p
->status
;
466 Lisp_Object string
, string2
;
468 decode_status (status
, &symbol
, &code
, &coredump
);
470 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
473 synchronize_system_messages_locale ();
474 signame
= strsignal (code
);
477 string
= build_string (signame
);
478 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
479 SSET (string
, 0, DOWNCASE (SREF (string
, 0)));
480 return concat2 (string
, string2
);
482 else if (EQ (symbol
, Qexit
))
485 return build_string (code
== 0 ? "deleted\n" : "connection broken by remote peer\n");
487 return build_string ("finished\n");
488 string
= Fnumber_to_string (make_number (code
));
489 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
490 return concat3 (build_string ("exited abnormally with code "),
493 else if (EQ (symbol
, Qfailed
))
495 string
= Fnumber_to_string (make_number (code
));
496 string2
= build_string ("\n");
497 return concat3 (build_string ("failed with code "),
501 return Fcopy_sequence (Fsymbol_name (symbol
));
506 /* Open an available pty, returning a file descriptor.
507 Return -1 on failure.
508 The file name of the terminal corresponding to the pty
509 is left in the variable pty_name. */
520 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
521 for (i
= 0; i
< 16; i
++)
524 struct stat stb
; /* Used in some PTY_OPEN. */
525 #ifdef PTY_NAME_SPRINTF
528 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
529 #endif /* no PTY_NAME_SPRINTF */
533 #else /* no PTY_OPEN */
536 /* Unusual IRIS code */
537 *ptyv
= emacs_open ("/dev/ptc", O_RDWR
| O_NDELAY
, 0);
540 if (fstat (fd
, &stb
) < 0)
542 # else /* not IRIS */
543 { /* Some systems name their pseudoterminals so that there are gaps in
544 the usual sequence - for example, on HP9000/S700 systems, there
545 are no pseudoterminals with names ending in 'f'. So we wait for
546 three failures in a row before deciding that we've reached the
548 int failed_count
= 0;
550 if (stat (pty_name
, &stb
) < 0)
553 if (failed_count
>= 3)
560 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
562 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
564 # endif /* not IRIS */
566 #endif /* no PTY_OPEN */
570 /* check to make certain that both sides are available
571 this avoids a nasty yet stupid bug in rlogins */
572 #ifdef PTY_TTY_NAME_SPRINTF
575 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
576 #endif /* no PTY_TTY_NAME_SPRINTF */
578 if (access (pty_name
, 6) != 0)
581 # if !defined(IRIS) && !defined(__sgi)
587 #endif /* not UNIPLUS */
594 #endif /* HAVE_PTYS */
600 register Lisp_Object val
, tem
, name1
;
601 register struct Lisp_Process
*p
;
605 p
= allocate_process ();
607 XSETINT (p
->infd
, -1);
608 XSETINT (p
->outfd
, -1);
609 XSETFASTINT (p
->pid
, 0);
610 XSETFASTINT (p
->tick
, 0);
611 XSETFASTINT (p
->update_tick
, 0);
612 p
->raw_status_low
= Qnil
;
613 p
->raw_status_high
= Qnil
;
615 p
->mark
= Fmake_marker ();
617 #ifdef ADAPTIVE_READ_BUFFERING
618 p
->adaptive_read_buffering
= Qnil
;
619 XSETFASTINT (p
->read_output_delay
, 0);
620 p
->read_output_skip
= Qnil
;
623 /* If name is already in use, modify it until it is unused. */
628 tem
= Fget_process (name1
);
629 if (NILP (tem
)) break;
630 sprintf (suffix
, "<%d>", i
);
631 name1
= concat2 (name
, build_string (suffix
));
635 XSETPROCESS (val
, p
);
636 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
641 remove_process (proc
)
642 register Lisp_Object proc
;
644 register Lisp_Object pair
;
646 pair
= Frassq (proc
, Vprocess_alist
);
647 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
649 deactivate_process (proc
);
652 /* Setup coding systems of PROCESS. */
655 setup_process_coding_systems (process
)
658 struct Lisp_Process
*p
= XPROCESS (process
);
659 int inch
= XINT (p
->infd
);
660 int outch
= XINT (p
->outfd
);
662 if (inch
< 0 || outch
< 0)
665 if (!proc_decode_coding_system
[inch
])
666 proc_decode_coding_system
[inch
]
667 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
668 setup_coding_system (p
->decode_coding_system
,
669 proc_decode_coding_system
[inch
]);
670 if (! NILP (p
->filter
))
672 if (NILP (p
->filter_multibyte
))
673 setup_raw_text_coding_system (proc_decode_coding_system
[inch
]);
675 else if (BUFFERP (p
->buffer
))
677 if (NILP (XBUFFER (p
->buffer
)->enable_multibyte_characters
))
678 setup_raw_text_coding_system (proc_decode_coding_system
[inch
]);
681 if (!proc_encode_coding_system
[outch
])
682 proc_encode_coding_system
[outch
]
683 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
684 setup_coding_system (p
->encode_coding_system
,
685 proc_encode_coding_system
[outch
]);
688 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
689 doc
: /* Return t if OBJECT is a process. */)
693 return PROCESSP (object
) ? Qt
: Qnil
;
696 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
697 doc
: /* Return the process named NAME, or nil if there is none. */)
699 register Lisp_Object name
;
704 return Fcdr (Fassoc (name
, Vprocess_alist
));
707 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
708 doc
: /* Return the (or a) process associated with BUFFER.
709 BUFFER may be a buffer or the name of one. */)
711 register Lisp_Object buffer
;
713 register Lisp_Object buf
, tail
, proc
;
715 if (NILP (buffer
)) return Qnil
;
716 buf
= Fget_buffer (buffer
);
717 if (NILP (buf
)) return Qnil
;
719 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
721 proc
= Fcdr (Fcar (tail
));
722 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
728 /* This is how commands for the user decode process arguments. It
729 accepts a process, a process name, a buffer, a buffer name, or nil.
730 Buffers denote the first process in the buffer, and nil denotes the
735 register Lisp_Object name
;
737 register Lisp_Object proc
, obj
;
740 obj
= Fget_process (name
);
742 obj
= Fget_buffer (name
);
744 error ("Process %s does not exist", SDATA (name
));
746 else if (NILP (name
))
747 obj
= Fcurrent_buffer ();
751 /* Now obj should be either a buffer object or a process object.
755 proc
= Fget_buffer_process (obj
);
757 error ("Buffer %s has no process", SDATA (XBUFFER (obj
)->name
));
767 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
768 doc
: /* Delete PROCESS: kill it and forget about it immediately.
769 PROCESS may be a process, a buffer, the name of a process or buffer, or
770 nil, indicating the current buffer's process. */)
772 register Lisp_Object process
;
774 register struct Lisp_Process
*p
;
776 process
= get_process (process
);
777 p
= XPROCESS (process
);
779 p
->raw_status_low
= Qnil
;
780 p
->raw_status_high
= Qnil
;
783 p
->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
784 XSETINT (p
->tick
, ++process_tick
);
787 else if (XINT (p
->infd
) >= 0)
789 Fkill_process (process
, Qnil
);
790 /* Do this now, since remove_process will make sigchld_handler do nothing. */
792 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
793 XSETINT (p
->tick
, ++process_tick
);
796 remove_process (process
);
800 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
801 doc
: /* Return the status of PROCESS.
802 The returned value is one of the following symbols:
803 run -- for a process that is running.
804 stop -- for a process stopped but continuable.
805 exit -- for a process that has exited.
806 signal -- for a process that has got a fatal signal.
807 open -- for a network stream connection that is open.
808 listen -- for a network stream server that is listening.
809 closed -- for a network stream connection that is closed.
810 connect -- when waiting for a non-blocking connection to complete.
811 failed -- when a non-blocking connection has failed.
812 nil -- if arg is a process name and no such process exists.
813 PROCESS may be a process, a buffer, the name of a process, or
814 nil, indicating the current buffer's process. */)
816 register Lisp_Object process
;
818 register struct Lisp_Process
*p
;
819 register Lisp_Object status
;
821 if (STRINGP (process
))
822 process
= Fget_process (process
);
824 process
= get_process (process
);
829 p
= XPROCESS (process
);
830 if (!NILP (p
->raw_status_low
))
834 status
= XCAR (status
);
837 if (EQ (status
, Qexit
))
839 else if (EQ (p
->command
, Qt
))
841 else if (EQ (status
, Qrun
))
847 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
849 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
850 If PROCESS has not yet exited or died, return 0. */)
852 register Lisp_Object process
;
854 CHECK_PROCESS (process
);
855 if (!NILP (XPROCESS (process
)->raw_status_low
))
856 update_status (XPROCESS (process
));
857 if (CONSP (XPROCESS (process
)->status
))
858 return XCAR (XCDR (XPROCESS (process
)->status
));
859 return make_number (0);
862 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
863 doc
: /* Return the process id of PROCESS.
864 This is the pid of the external process which PROCESS uses or talks to.
865 For a network connection, this value is nil. */)
867 register Lisp_Object process
;
869 CHECK_PROCESS (process
);
870 return XPROCESS (process
)->pid
;
873 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
874 doc
: /* Return the name of PROCESS, as a string.
875 This is the name of the program invoked in PROCESS,
876 possibly modified to make it unique among process names. */)
878 register Lisp_Object process
;
880 CHECK_PROCESS (process
);
881 return XPROCESS (process
)->name
;
884 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
885 doc
: /* Return the command that was executed to start PROCESS.
886 This is a list of strings, the first string being the program executed
887 and the rest of the strings being the arguments given to it.
888 For a non-child channel, this is nil. */)
890 register Lisp_Object process
;
892 CHECK_PROCESS (process
);
893 return XPROCESS (process
)->command
;
896 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
897 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
898 This is the terminal that the process itself reads and writes on,
899 not the name of the pty that Emacs uses to talk with that terminal. */)
901 register Lisp_Object process
;
903 CHECK_PROCESS (process
);
904 return XPROCESS (process
)->tty_name
;
907 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
909 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil). */)
911 register Lisp_Object process
, buffer
;
913 struct Lisp_Process
*p
;
915 CHECK_PROCESS (process
);
917 CHECK_BUFFER (buffer
);
918 p
= XPROCESS (process
);
921 p
->childp
= Fplist_put (p
->childp
, QCbuffer
, buffer
);
922 setup_process_coding_systems (process
);
926 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
928 doc
: /* Return the buffer PROCESS is associated with.
929 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
931 register Lisp_Object process
;
933 CHECK_PROCESS (process
);
934 return XPROCESS (process
)->buffer
;
937 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
939 doc
: /* Return the marker for the end of the last output from PROCESS. */)
941 register Lisp_Object process
;
943 CHECK_PROCESS (process
);
944 return XPROCESS (process
)->mark
;
947 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
949 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
950 t means stop accepting output from the process.
952 When a process has a filter, its buffer is not used for output.
953 Instead, each time it does output, the entire string of output is
954 passed to the filter.
956 The filter gets two arguments: the process and the string of output.
957 The string argument is normally a multibyte string, except:
958 - if the process' input coding system is no-conversion or raw-text,
959 it is a unibyte string (the non-converted input), or else
960 - if `default-enable-multibyte-characters' is nil, it is a unibyte
961 string (the result of converting the decoded input multibyte
962 string to unibyte with `string-make-unibyte'). */)
964 register Lisp_Object process
, filter
;
966 struct Lisp_Process
*p
;
968 CHECK_PROCESS (process
);
969 p
= XPROCESS (process
);
971 /* Don't signal an error if the process' input file descriptor
972 is closed. This could make debugging Lisp more difficult,
973 for example when doing something like
975 (setq process (start-process ...))
977 (set-process-filter process ...) */
979 if (XINT (p
->infd
) >= 0)
981 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
983 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
984 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
986 else if (EQ (p
->filter
, Qt
)
987 && !EQ (p
->command
, Qt
)) /* Network process not stopped. */
989 FD_SET (XINT (p
->infd
), &input_wait_mask
);
990 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
996 p
->childp
= Fplist_put (p
->childp
, QCfilter
, filter
);
997 setup_process_coding_systems (process
);
1001 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
1003 doc
: /* Returns the filter function of PROCESS; nil if none.
1004 See `set-process-filter' for more info on filter functions. */)
1006 register Lisp_Object process
;
1008 CHECK_PROCESS (process
);
1009 return XPROCESS (process
)->filter
;
1012 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
1014 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
1015 The sentinel is called as a function when the process changes state.
1016 It gets two arguments: the process, and a string describing the change. */)
1018 register Lisp_Object process
, sentinel
;
1020 struct Lisp_Process
*p
;
1022 CHECK_PROCESS (process
);
1023 p
= XPROCESS (process
);
1025 p
->sentinel
= sentinel
;
1027 p
->childp
= Fplist_put (p
->childp
, QCsentinel
, sentinel
);
1031 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1033 doc
: /* Return the sentinel of PROCESS; nil if none.
1034 See `set-process-sentinel' for more info on sentinels. */)
1036 register Lisp_Object process
;
1038 CHECK_PROCESS (process
);
1039 return XPROCESS (process
)->sentinel
;
1042 DEFUN ("set-process-window-size", Fset_process_window_size
,
1043 Sset_process_window_size
, 3, 3, 0,
1044 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1045 (process
, height
, width
)
1046 register Lisp_Object process
, height
, width
;
1048 CHECK_PROCESS (process
);
1049 CHECK_NATNUM (height
);
1050 CHECK_NATNUM (width
);
1052 if (XINT (XPROCESS (process
)->infd
) < 0
1053 || set_window_size (XINT (XPROCESS (process
)->infd
),
1054 XINT (height
), XINT (width
)) <= 0)
1060 DEFUN ("set-process-inherit-coding-system-flag",
1061 Fset_process_inherit_coding_system_flag
,
1062 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1063 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1064 If the second argument FLAG is non-nil, then the variable
1065 `buffer-file-coding-system' of the buffer associated with PROCESS
1066 will be bound to the value of the coding system used to decode
1069 This is useful when the coding system specified for the process buffer
1070 leaves either the character code conversion or the end-of-line conversion
1071 unspecified, or if the coding system used to decode the process output
1072 is more appropriate for saving the process buffer.
1074 Binding the variable `inherit-process-coding-system' to non-nil before
1075 starting the process is an alternative way of setting the inherit flag
1076 for the process which will run. */)
1078 register Lisp_Object process
, flag
;
1080 CHECK_PROCESS (process
);
1081 XPROCESS (process
)->inherit_coding_system_flag
= flag
;
1085 DEFUN ("process-inherit-coding-system-flag",
1086 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
1088 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
1089 If this flag is t, `buffer-file-coding-system' of the buffer
1090 associated with PROCESS will inherit the coding system used to decode
1091 the process output. */)
1093 register Lisp_Object process
;
1095 CHECK_PROCESS (process
);
1096 return XPROCESS (process
)->inherit_coding_system_flag
;
1099 DEFUN ("set-process-query-on-exit-flag",
1100 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1102 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1103 If the second argument FLAG is non-nil, Emacs will query the user before
1104 exiting if PROCESS is running. */)
1106 register Lisp_Object process
, flag
;
1108 CHECK_PROCESS (process
);
1109 XPROCESS (process
)->kill_without_query
= Fnull (flag
);
1113 DEFUN ("process-query-on-exit-flag",
1114 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1116 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1118 register Lisp_Object process
;
1120 CHECK_PROCESS (process
);
1121 return Fnull (XPROCESS (process
)->kill_without_query
);
1124 #ifdef DATAGRAM_SOCKETS
1125 Lisp_Object
Fprocess_datagram_address ();
1128 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1130 doc
: /* Return the contact info of PROCESS; t for a real child.
1131 For a net connection, the value depends on the optional KEY arg.
1132 If KEY is nil, value is a cons cell of the form (HOST SERVICE),
1133 if KEY is t, the complete contact information for the connection is
1134 returned, else the specific value for the keyword KEY is returned.
1135 See `make-network-process' for a list of keywords. */)
1137 register Lisp_Object process
, key
;
1139 Lisp_Object contact
;
1141 CHECK_PROCESS (process
);
1142 contact
= XPROCESS (process
)->childp
;
1144 #ifdef DATAGRAM_SOCKETS
1145 if (DATAGRAM_CONN_P (process
)
1146 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1147 contact
= Fplist_put (contact
, QCremote
,
1148 Fprocess_datagram_address (process
));
1151 if (!NETCONN_P (process
) || EQ (key
, Qt
))
1154 return Fcons (Fplist_get (contact
, QChost
),
1155 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1156 return Fplist_get (contact
, key
);
1159 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1161 doc
: /* Return the plist of PROCESS. */)
1163 register Lisp_Object process
;
1165 CHECK_PROCESS (process
);
1166 return XPROCESS (process
)->plist
;
1169 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1171 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1173 register Lisp_Object process
, plist
;
1175 CHECK_PROCESS (process
);
1178 XPROCESS (process
)->plist
= plist
;
1182 #if 0 /* Turned off because we don't currently record this info
1183 in the process. Perhaps add it. */
1184 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1185 doc
: /* Return the connection type of PROCESS.
1186 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1187 a socket connection. */)
1189 Lisp_Object process
;
1191 return XPROCESS (process
)->type
;
1196 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1198 doc
: /* Convert network ADDRESS from internal format to a string.
1199 If optional second argument OMIT-PORT is non-nil, don't include a port
1200 number in the string; in this case, interpret a 4 element vector as an
1201 IP address. Returns nil if format of ADDRESS is invalid. */)
1202 (address
, omit_port
)
1203 Lisp_Object address
, omit_port
;
1208 if (STRINGP (address
)) /* AF_LOCAL */
1211 if (VECTORP (address
)) /* AF_INET */
1213 register struct Lisp_Vector
*p
= XVECTOR (address
);
1214 Lisp_Object args
[6];
1217 if (!NILP (omit_port
) && (p
->size
== 4 || p
->size
== 5))
1219 args
[0] = build_string ("%d.%d.%d.%d");
1222 else if (p
->size
== 5)
1224 args
[0] = build_string ("%d.%d.%d.%d:%d");
1230 for (i
= 0; i
< nargs
; i
++)
1231 args
[i
+1] = p
->contents
[i
];
1232 return Fformat (nargs
+1, args
);
1235 if (CONSP (address
))
1237 Lisp_Object args
[2];
1238 args
[0] = build_string ("<Family %d>");
1239 args
[1] = Fcar (address
);
1240 return Fformat (2, args
);
1249 list_processes_1 (query_only
)
1250 Lisp_Object query_only
;
1252 register Lisp_Object tail
, tem
;
1253 Lisp_Object proc
, minspace
, tem1
;
1254 register struct Lisp_Process
*p
;
1256 int w_proc
, w_buffer
, w_tty
;
1257 Lisp_Object i_status
, i_buffer
, i_tty
, i_command
;
1259 w_proc
= 4; /* Proc */
1260 w_buffer
= 6; /* Buffer */
1261 w_tty
= 0; /* Omit if no ttys */
1263 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
1267 proc
= Fcdr (Fcar (tail
));
1268 p
= XPROCESS (proc
);
1269 if (NILP (p
->childp
))
1271 if (!NILP (query_only
) && !NILP (p
->kill_without_query
))
1273 if (STRINGP (p
->name
)
1274 && ( i
= SCHARS (p
->name
), (i
> w_proc
)))
1276 if (!NILP (p
->buffer
))
1278 if (NILP (XBUFFER (p
->buffer
)->name
) && w_buffer
< 8)
1279 w_buffer
= 8; /* (Killed) */
1280 else if ((i
= SCHARS (XBUFFER (p
->buffer
)->name
), (i
> w_buffer
)))
1283 if (STRINGP (p
->tty_name
)
1284 && (i
= SCHARS (p
->tty_name
), (i
> w_tty
)))
1288 XSETFASTINT (i_status
, w_proc
+ 1);
1289 XSETFASTINT (i_buffer
, XFASTINT (i_status
) + 9);
1292 XSETFASTINT (i_tty
, XFASTINT (i_buffer
) + w_buffer
+ 1);
1293 XSETFASTINT (i_command
, XFASTINT (i_buffer
) + w_tty
+ 1);
1296 XSETFASTINT (i_command
, XFASTINT (i_buffer
) + w_buffer
+ 1);
1299 XSETFASTINT (minspace
, 1);
1301 set_buffer_internal (XBUFFER (Vstandard_output
));
1302 current_buffer
->undo_list
= Qt
;
1304 current_buffer
->truncate_lines
= Qt
;
1306 write_string ("Proc", -1);
1307 Findent_to (i_status
, minspace
); write_string ("Status", -1);
1308 Findent_to (i_buffer
, minspace
); write_string ("Buffer", -1);
1311 Findent_to (i_tty
, minspace
); write_string ("Tty", -1);
1313 Findent_to (i_command
, minspace
); write_string ("Command", -1);
1314 write_string ("\n", -1);
1316 write_string ("----", -1);
1317 Findent_to (i_status
, minspace
); write_string ("------", -1);
1318 Findent_to (i_buffer
, minspace
); write_string ("------", -1);
1321 Findent_to (i_tty
, minspace
); write_string ("---", -1);
1323 Findent_to (i_command
, minspace
); write_string ("-------", -1);
1324 write_string ("\n", -1);
1326 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
1330 proc
= Fcdr (Fcar (tail
));
1331 p
= XPROCESS (proc
);
1332 if (NILP (p
->childp
))
1334 if (!NILP (query_only
) && !NILP (p
->kill_without_query
))
1337 Finsert (1, &p
->name
);
1338 Findent_to (i_status
, minspace
);
1340 if (!NILP (p
->raw_status_low
))
1343 if (CONSP (p
->status
))
1344 symbol
= XCAR (p
->status
);
1347 if (EQ (symbol
, Qsignal
))
1350 tem
= Fcar (Fcdr (p
->status
));
1352 if (XINT (tem
) < NSIG
)
1353 write_string (sys_errlist
[XINT (tem
)], -1);
1356 Fprinc (symbol
, Qnil
);
1358 else if (NETCONN1_P (p
))
1360 if (EQ (symbol
, Qexit
))
1361 write_string ("closed", -1);
1362 else if (EQ (p
->command
, Qt
))
1363 write_string ("stopped", -1);
1364 else if (EQ (symbol
, Qrun
))
1365 write_string ("open", -1);
1367 Fprinc (symbol
, Qnil
);
1370 Fprinc (symbol
, Qnil
);
1372 if (EQ (symbol
, Qexit
))
1375 tem
= Fcar (Fcdr (p
->status
));
1378 sprintf (tembuf
, " %d", (int) XFASTINT (tem
));
1379 write_string (tembuf
, -1);
1383 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
1384 remove_process (proc
);
1386 Findent_to (i_buffer
, minspace
);
1387 if (NILP (p
->buffer
))
1388 insert_string ("(none)");
1389 else if (NILP (XBUFFER (p
->buffer
)->name
))
1390 insert_string ("(Killed)");
1392 Finsert (1, &XBUFFER (p
->buffer
)->name
);
1396 Findent_to (i_tty
, minspace
);
1397 if (STRINGP (p
->tty_name
))
1398 Finsert (1, &p
->tty_name
);
1401 Findent_to (i_command
, minspace
);
1403 if (EQ (p
->status
, Qlisten
))
1405 Lisp_Object port
= Fplist_get (p
->childp
, QCservice
);
1406 if (INTEGERP (port
))
1407 port
= Fnumber_to_string (port
);
1409 port
= Fformat_network_address (Fplist_get (p
->childp
, QClocal
), Qnil
);
1410 sprintf (tembuf
, "(network %s server on %s)\n",
1411 (DATAGRAM_CHAN_P (XINT (p
->infd
)) ? "datagram" : "stream"),
1412 (STRINGP (port
) ? (char *)SDATA (port
) : "?"));
1413 insert_string (tembuf
);
1415 else if (NETCONN1_P (p
))
1417 /* For a local socket, there is no host name,
1418 so display service instead. */
1419 Lisp_Object host
= Fplist_get (p
->childp
, QChost
);
1420 if (!STRINGP (host
))
1422 host
= Fplist_get (p
->childp
, QCservice
);
1423 if (INTEGERP (host
))
1424 host
= Fnumber_to_string (host
);
1427 host
= Fformat_network_address (Fplist_get (p
->childp
, QCremote
), Qnil
);
1428 sprintf (tembuf
, "(network %s connection to %s)\n",
1429 (DATAGRAM_CHAN_P (XINT (p
->infd
)) ? "datagram" : "stream"),
1430 (STRINGP (host
) ? (char *)SDATA (host
) : "?"));
1431 insert_string (tembuf
);
1443 insert_string (" ");
1445 insert_string ("\n");
1451 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 1, "P",
1452 doc
: /* Display a list of all processes.
1453 If optional argument QUERY-ONLY is non-nil, only processes with
1454 the query-on-exit flag set will be listed.
1455 Any process listed as exited or signaled is actually eliminated
1456 after the listing is made. */)
1458 Lisp_Object query_only
;
1460 internal_with_output_to_temp_buffer ("*Process List*",
1461 list_processes_1
, query_only
);
1465 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1466 doc
: /* Return a list of all processes. */)
1469 return Fmapcar (Qcdr
, Vprocess_alist
);
1472 /* Starting asynchronous inferior processes. */
1474 static Lisp_Object
start_process_unwind ();
1476 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1477 doc
: /* Start a program in a subprocess. Return the process object for it.
1478 NAME is name for process. It is modified if necessary to make it unique.
1479 BUFFER is the buffer (or buffer name) to associate with the process.
1480 Process output goes at end of that buffer, unless you specify
1481 an output stream or filter function to handle the output.
1482 BUFFER may be also nil, meaning that this process is not associated
1484 PROGRAM is the program file name. It is searched for in PATH.
1485 Remaining arguments are strings to give program as arguments.
1487 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1490 register Lisp_Object
*args
;
1492 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1494 register unsigned char *new_argv
;
1497 register unsigned char **new_argv
;
1500 int count
= SPECPDL_INDEX ();
1504 buffer
= Fget_buffer_create (buffer
);
1506 /* Make sure that the child will be able to chdir to the current
1507 buffer's current directory, or its unhandled equivalent. We
1508 can't just have the child check for an error when it does the
1509 chdir, since it's in a vfork.
1511 We have to GCPRO around this because Fexpand_file_name and
1512 Funhandled_file_name_directory might call a file name handling
1513 function. The argument list is protected by the caller, so all
1514 we really have to worry about is buffer. */
1516 struct gcpro gcpro1
, gcpro2
;
1518 current_dir
= current_buffer
->directory
;
1520 GCPRO2 (buffer
, current_dir
);
1523 = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir
),
1525 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1526 report_file_error ("Setting current directory",
1527 Fcons (current_buffer
->directory
, Qnil
));
1533 CHECK_STRING (name
);
1537 CHECK_STRING (program
);
1539 proc
= make_process (name
);
1540 /* If an error occurs and we can't start the process, we want to
1541 remove it from the process list. This means that each error
1542 check in create_process doesn't need to call remove_process
1543 itself; it's all taken care of here. */
1544 record_unwind_protect (start_process_unwind
, proc
);
1546 XPROCESS (proc
)->childp
= Qt
;
1547 XPROCESS (proc
)->plist
= Qnil
;
1548 XPROCESS (proc
)->buffer
= buffer
;
1549 XPROCESS (proc
)->sentinel
= Qnil
;
1550 XPROCESS (proc
)->filter
= Qnil
;
1551 XPROCESS (proc
)->filter_multibyte
1552 = buffer_defaults
.enable_multibyte_characters
;
1553 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1555 #ifdef ADAPTIVE_READ_BUFFERING
1556 XPROCESS (proc
)->adaptive_read_buffering
= Vprocess_adaptive_read_buffering
;
1559 /* Make the process marker point into the process buffer (if any). */
1561 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1562 BUF_ZV (XBUFFER (buffer
)),
1563 BUF_ZV_BYTE (XBUFFER (buffer
)));
1566 /* Decide coding systems for communicating with the process. Here
1567 we don't setup the structure coding_system nor pay attention to
1568 unibyte mode. They are done in create_process. */
1570 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1571 Lisp_Object coding_systems
= Qt
;
1572 Lisp_Object val
, *args2
;
1573 struct gcpro gcpro1
, gcpro2
;
1575 val
= Vcoding_system_for_read
;
1578 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1579 args2
[0] = Qstart_process
;
1580 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1581 GCPRO2 (proc
, current_dir
);
1582 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1584 if (CONSP (coding_systems
))
1585 val
= XCAR (coding_systems
);
1586 else if (CONSP (Vdefault_process_coding_system
))
1587 val
= XCAR (Vdefault_process_coding_system
);
1589 XPROCESS (proc
)->decode_coding_system
= val
;
1591 val
= Vcoding_system_for_write
;
1594 if (EQ (coding_systems
, Qt
))
1596 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof args2
);
1597 args2
[0] = Qstart_process
;
1598 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1599 GCPRO2 (proc
, current_dir
);
1600 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1603 if (CONSP (coding_systems
))
1604 val
= XCDR (coding_systems
);
1605 else if (CONSP (Vdefault_process_coding_system
))
1606 val
= XCDR (Vdefault_process_coding_system
);
1608 XPROCESS (proc
)->encode_coding_system
= val
;
1612 /* Make a one member argv with all args concatenated
1613 together separated by a blank. */
1614 len
= SBYTES (program
) + 2;
1615 for (i
= 3; i
< nargs
; i
++)
1619 len
+= SBYTES (tem
) + 1; /* count the blank */
1621 new_argv
= (unsigned char *) alloca (len
);
1622 strcpy (new_argv
, SDATA (program
));
1623 for (i
= 3; i
< nargs
; i
++)
1627 strcat (new_argv
, " ");
1628 strcat (new_argv
, SDATA (tem
));
1630 /* Need to add code here to check for program existence on VMS */
1633 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1635 /* If program file name is not absolute, search our path for it.
1636 Put the name we will really use in TEM. */
1637 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1638 && !(SCHARS (program
) > 1
1639 && IS_DEVICE_SEP (SREF (program
, 1))))
1641 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1644 GCPRO4 (name
, program
, buffer
, current_dir
);
1645 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1648 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1649 tem
= Fexpand_file_name (tem
, Qnil
);
1653 if (!NILP (Ffile_directory_p (program
)))
1654 error ("Specified program for new process is a directory");
1658 /* If program file name starts with /: for quoting a magic name,
1660 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1661 && SREF (tem
, 1) == ':')
1662 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1664 /* Encode the file name and put it in NEW_ARGV.
1665 That's where the child will use it to execute the program. */
1666 tem
= ENCODE_FILE (tem
);
1667 new_argv
[0] = SDATA (tem
);
1669 /* Here we encode arguments by the coding system used for sending
1670 data to the process. We don't support using different coding
1671 systems for encoding arguments and for encoding data sent to the
1674 for (i
= 3; i
< nargs
; i
++)
1678 if (STRING_MULTIBYTE (tem
))
1679 tem
= (code_convert_string_norecord
1680 (tem
, XPROCESS (proc
)->encode_coding_system
, 1));
1681 new_argv
[i
- 2] = SDATA (tem
);
1683 new_argv
[i
- 2] = 0;
1684 #endif /* not VMS */
1686 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
1687 XPROCESS (proc
)->decoding_carryover
= make_number (0);
1688 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
1689 XPROCESS (proc
)->encoding_carryover
= make_number (0);
1691 XPROCESS (proc
)->inherit_coding_system_flag
1692 = (NILP (buffer
) || !inherit_process_coding_system
1695 create_process (proc
, (char **) new_argv
, current_dir
);
1697 return unbind_to (count
, proc
);
1700 /* This function is the unwind_protect form for Fstart_process. If
1701 PROC doesn't have its pid set, then we know someone has signaled
1702 an error and the process wasn't started successfully, so we should
1703 remove it from the process list. */
1705 start_process_unwind (proc
)
1708 if (!PROCESSP (proc
))
1711 /* Was PROC started successfully? */
1712 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1713 remove_process (proc
);
1719 create_process_1 (timer
)
1720 struct atimer
*timer
;
1722 /* Nothing to do. */
1726 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1729 /* Mimic blocking of signals on system V, which doesn't really have it. */
1731 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1732 int sigchld_deferred
;
1735 create_process_sigchld ()
1737 signal (SIGCHLD
, create_process_sigchld
);
1739 sigchld_deferred
= 1;
1745 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1747 create_process (process
, new_argv
, current_dir
)
1748 Lisp_Object process
;
1750 Lisp_Object current_dir
;
1752 int pid
, inchannel
, outchannel
;
1754 #ifdef POSIX_SIGNALS
1757 struct sigaction sigint_action
;
1758 struct sigaction sigquit_action
;
1760 struct sigaction sighup_action
;
1762 #else /* !POSIX_SIGNALS */
1765 SIGTYPE (*sigchld
)();
1768 #endif /* !POSIX_SIGNALS */
1769 /* Use volatile to protect variables from being clobbered by longjmp. */
1770 volatile int forkin
, forkout
;
1771 volatile int pty_flag
= 0;
1773 extern char **environ
;
1776 inchannel
= outchannel
= -1;
1779 if (!NILP (Vprocess_connection_type
))
1780 outchannel
= inchannel
= allocate_pty ();
1784 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1785 /* On most USG systems it does not work to open the pty's tty here,
1786 then close it and reopen it in the child. */
1788 /* Don't let this terminal become our controlling terminal
1789 (in case we don't have one). */
1790 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1792 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1795 report_file_error ("Opening pty", Qnil
);
1797 forkin
= forkout
= -1;
1798 #endif /* not USG, or USG_SUBTTY_WORKS */
1802 #endif /* HAVE_PTYS */
1805 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1806 report_file_error ("Opening socketpair", Qnil
);
1807 outchannel
= inchannel
= sv
[0];
1808 forkout
= forkin
= sv
[1];
1810 #else /* not SKTPAIR */
1815 report_file_error ("Creating pipe", Qnil
);
1821 emacs_close (inchannel
);
1822 emacs_close (forkout
);
1823 report_file_error ("Creating pipe", Qnil
);
1828 #endif /* not SKTPAIR */
1831 /* Replaced by close_process_descs */
1832 set_exclusive_use (inchannel
);
1833 set_exclusive_use (outchannel
);
1836 /* Stride people say it's a mystery why this is needed
1837 as well as the O_NDELAY, but that it fails without this. */
1838 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1841 ioctl (inchannel
, FIONBIO
, &one
);
1846 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1847 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1850 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1851 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1855 /* Record this as an active process, with its channels.
1856 As a result, child_setup will close Emacs's side of the pipes. */
1857 chan_process
[inchannel
] = process
;
1858 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1859 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1861 /* Previously we recorded the tty descriptor used in the subprocess.
1862 It was only used for getting the foreground tty process, so now
1863 we just reopen the device (see emacs_get_tty_pgrp) as this is
1864 more portable (see USG_SUBTTY_WORKS above). */
1866 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1867 XPROCESS (process
)->status
= Qrun
;
1868 setup_process_coding_systems (process
);
1870 /* Delay interrupts until we have a chance to store
1871 the new fork's pid in its process structure */
1872 #ifdef POSIX_SIGNALS
1873 sigemptyset (&blocked
);
1875 sigaddset (&blocked
, SIGCHLD
);
1877 #ifdef HAVE_WORKING_VFORK
1878 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1879 this sets the parent's signal handlers as well as the child's.
1880 So delay all interrupts whose handlers the child might munge,
1881 and record the current handlers so they can be restored later. */
1882 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1883 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1885 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1887 #endif /* HAVE_WORKING_VFORK */
1888 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1889 #else /* !POSIX_SIGNALS */
1893 #else /* not BSD4_1 */
1894 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1895 sigsetmask (sigmask (SIGCHLD
));
1896 #else /* ordinary USG */
1898 sigchld_deferred
= 0;
1899 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1901 #endif /* ordinary USG */
1902 #endif /* not BSD4_1 */
1903 #endif /* SIGCHLD */
1904 #endif /* !POSIX_SIGNALS */
1906 FD_SET (inchannel
, &input_wait_mask
);
1907 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1908 if (inchannel
> max_process_desc
)
1909 max_process_desc
= inchannel
;
1911 /* Until we store the proper pid, enable sigchld_handler
1912 to recognize an unknown pid as standing for this process.
1913 It is very important not to let this `marker' value stay
1914 in the table after this function has returned; if it does
1915 it might cause call-process to hang and subsequent asynchronous
1916 processes to get their return values scrambled. */
1917 XSETINT (XPROCESS (process
)->pid
, -1);
1922 /* child_setup must clobber environ on systems with true vfork.
1923 Protect it from permanent change. */
1924 char **save_environ
= environ
;
1926 current_dir
= ENCODE_FILE (current_dir
);
1931 #endif /* not WINDOWSNT */
1933 int xforkin
= forkin
;
1934 int xforkout
= forkout
;
1936 #if 0 /* This was probably a mistake--it duplicates code later on,
1937 but fails to handle all the cases. */
1938 /* Make sure SIGCHLD is not blocked in the child. */
1939 sigsetmask (SIGEMPTYMASK
);
1942 /* Make the pty be the controlling terminal of the process. */
1944 /* First, disconnect its current controlling terminal. */
1946 /* We tried doing setsid only if pty_flag, but it caused
1947 process_set_signal to fail on SGI when using a pipe. */
1949 /* Make the pty's terminal the controlling terminal. */
1953 /* We ignore the return value
1954 because faith@cs.unc.edu says that is necessary on Linux. */
1955 ioctl (xforkin
, TIOCSCTTY
, 0);
1958 #else /* not HAVE_SETSID */
1960 /* It's very important to call setpgrp here and no time
1961 afterwards. Otherwise, we lose our controlling tty which
1962 is set when we open the pty. */
1965 #endif /* not HAVE_SETSID */
1966 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1967 if (pty_flag
&& xforkin
>= 0)
1970 tcgetattr (xforkin
, &t
);
1972 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1973 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1976 #if defined (NTTYDISC) && defined (TIOCSETD)
1977 if (pty_flag
&& xforkin
>= 0)
1979 /* Use new line discipline. */
1980 int ldisc
= NTTYDISC
;
1981 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1986 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1987 can do TIOCSPGRP only to the process's controlling tty. */
1990 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1991 I can't test it since I don't have 4.3. */
1992 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1993 ioctl (j
, TIOCNOTTY
, 0);
1996 /* In order to get a controlling terminal on some versions
1997 of BSD, it is necessary to put the process in pgrp 0
1998 before it opens the terminal. */
2006 #endif /* TIOCNOTTY */
2008 #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY)
2009 /*** There is a suggestion that this ought to be a
2010 conditional on TIOCSPGRP,
2011 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
2012 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
2013 that system does seem to need this code, even though
2014 both HAVE_SETSID and TIOCSCTTY are defined. */
2015 /* Now close the pty (if we had it open) and reopen it.
2016 This makes the pty the controlling terminal of the subprocess. */
2019 #ifdef SET_CHILD_PTY_PGRP
2020 int pgrp
= getpid ();
2023 /* I wonder if emacs_close (emacs_open (pty_name, ...))
2026 emacs_close (xforkin
);
2027 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
2031 emacs_write (1, "Couldn't open the pty terminal ", 31);
2032 emacs_write (1, pty_name
, strlen (pty_name
));
2033 emacs_write (1, "\n", 1);
2037 #ifdef SET_CHILD_PTY_PGRP
2038 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
2039 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
2042 #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */
2044 #ifdef SETUP_SLAVE_PTY
2049 #endif /* SETUP_SLAVE_PTY */
2051 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
2052 Now reenable it in the child, so it will die when we want it to. */
2054 signal (SIGHUP
, SIG_DFL
);
2056 #endif /* HAVE_PTYS */
2058 signal (SIGINT
, SIG_DFL
);
2059 signal (SIGQUIT
, SIG_DFL
);
2061 /* Stop blocking signals in the child. */
2062 #ifdef POSIX_SIGNALS
2063 sigprocmask (SIG_SETMASK
, &procmask
, 0);
2064 #else /* !POSIX_SIGNALS */
2068 #else /* not BSD4_1 */
2069 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
2070 sigsetmask (SIGEMPTYMASK
);
2071 #else /* ordinary USG */
2073 signal (SIGCHLD
, sigchld
);
2075 #endif /* ordinary USG */
2076 #endif /* not BSD4_1 */
2077 #endif /* SIGCHLD */
2078 #endif /* !POSIX_SIGNALS */
2081 child_setup_tty (xforkout
);
2083 pid
= child_setup (xforkin
, xforkout
, xforkout
,
2084 new_argv
, 1, current_dir
);
2085 #else /* not WINDOWSNT */
2086 child_setup (xforkin
, xforkout
, xforkout
,
2087 new_argv
, 1, current_dir
);
2088 #endif /* not WINDOWSNT */
2090 environ
= save_environ
;
2095 /* This runs in the Emacs process. */
2099 emacs_close (forkin
);
2100 if (forkin
!= forkout
&& forkout
>= 0)
2101 emacs_close (forkout
);
2105 /* vfork succeeded. */
2106 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
2109 register_child (pid
, inchannel
);
2110 #endif /* WINDOWSNT */
2112 /* If the subfork execv fails, and it exits,
2113 this close hangs. I don't know why.
2114 So have an interrupt jar it loose. */
2116 struct atimer
*timer
;
2120 EMACS_SET_SECS_USECS (offset
, 1, 0);
2121 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
2124 emacs_close (forkin
);
2126 cancel_atimer (timer
);
2130 if (forkin
!= forkout
&& forkout
>= 0)
2131 emacs_close (forkout
);
2135 XPROCESS (process
)->tty_name
= build_string (pty_name
);
2138 XPROCESS (process
)->tty_name
= Qnil
;
2141 /* Restore the signal state whether vfork succeeded or not.
2142 (We will signal an error, below, if it failed.) */
2143 #ifdef POSIX_SIGNALS
2144 #ifdef HAVE_WORKING_VFORK
2145 /* Restore the parent's signal handlers. */
2146 sigaction (SIGINT
, &sigint_action
, 0);
2147 sigaction (SIGQUIT
, &sigquit_action
, 0);
2149 sigaction (SIGHUP
, &sighup_action
, 0);
2151 #endif /* HAVE_WORKING_VFORK */
2152 /* Stop blocking signals in the parent. */
2153 sigprocmask (SIG_SETMASK
, &procmask
, 0);
2154 #else /* !POSIX_SIGNALS */
2158 #else /* not BSD4_1 */
2159 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
2160 sigsetmask (SIGEMPTYMASK
);
2161 #else /* ordinary USG */
2163 signal (SIGCHLD
, sigchld
);
2164 /* Now really handle any of these signals
2165 that came in during this function. */
2166 if (sigchld_deferred
)
2167 kill (getpid (), SIGCHLD
);
2169 #endif /* ordinary USG */
2170 #endif /* not BSD4_1 */
2171 #endif /* SIGCHLD */
2172 #endif /* !POSIX_SIGNALS */
2174 /* Now generate the error if vfork failed. */
2176 report_file_error ("Doing vfork", Qnil
);
2178 #endif /* not VMS */
2183 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2184 The address family of sa is not included in the result. */
2187 conv_sockaddr_to_lisp (sa
, len
)
2188 struct sockaddr
*sa
;
2191 Lisp_Object address
;
2194 register struct Lisp_Vector
*p
;
2196 switch (sa
->sa_family
)
2200 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2201 len
= sizeof (sin
->sin_addr
) + 1;
2202 address
= Fmake_vector (make_number (len
), Qnil
);
2203 p
= XVECTOR (address
);
2204 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2205 cp
= (unsigned char *)&sin
->sin_addr
;
2208 #ifdef HAVE_LOCAL_SOCKETS
2211 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2212 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2213 if (sockun
->sun_path
[i
] == 0)
2215 return make_unibyte_string (sockun
->sun_path
, i
);
2219 len
-= sizeof (sa
->sa_family
);
2220 address
= Fcons (make_number (sa
->sa_family
),
2221 Fmake_vector (make_number (len
), Qnil
));
2222 p
= XVECTOR (XCDR (address
));
2223 cp
= (unsigned char *) sa
+ sizeof (sa
->sa_family
);
2229 p
->contents
[i
++] = make_number (*cp
++);
2235 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2238 get_lisp_to_sockaddr_size (address
, familyp
)
2239 Lisp_Object address
;
2242 register struct Lisp_Vector
*p
;
2244 if (VECTORP (address
))
2246 p
= XVECTOR (address
);
2250 return sizeof (struct sockaddr_in
);
2253 #ifdef HAVE_LOCAL_SOCKETS
2254 else if (STRINGP (address
))
2256 *familyp
= AF_LOCAL
;
2257 return sizeof (struct sockaddr_un
);
2260 else if (CONSP (address
) && INTEGERP (XCAR (address
)) && VECTORP (XCDR (address
)))
2262 struct sockaddr
*sa
;
2263 *familyp
= XINT (XCAR (address
));
2264 p
= XVECTOR (XCDR (address
));
2265 return p
->size
+ sizeof (sa
->sa_family
);
2270 /* Convert an address object (vector or string) to an internal sockaddr.
2271 Format of address has already been validated by size_lisp_to_sockaddr. */
2274 conv_lisp_to_sockaddr (family
, address
, sa
, len
)
2276 Lisp_Object address
;
2277 struct sockaddr
*sa
;
2280 register struct Lisp_Vector
*p
;
2281 register unsigned char *cp
= NULL
;
2285 sa
->sa_family
= family
;
2287 if (VECTORP (address
))
2289 p
= XVECTOR (address
);
2290 if (family
== AF_INET
)
2292 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2293 len
= sizeof (sin
->sin_addr
) + 1;
2294 i
= XINT (p
->contents
[--len
]);
2295 sin
->sin_port
= htons (i
);
2296 cp
= (unsigned char *)&sin
->sin_addr
;
2299 else if (STRINGP (address
))
2301 #ifdef HAVE_LOCAL_SOCKETS
2302 if (family
== AF_LOCAL
)
2304 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2305 cp
= SDATA (address
);
2306 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2307 sockun
->sun_path
[i
] = *cp
++;
2314 p
= XVECTOR (XCDR (address
));
2315 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2318 for (i
= 0; i
< len
; i
++)
2319 if (INTEGERP (p
->contents
[i
]))
2320 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2323 #ifdef DATAGRAM_SOCKETS
2324 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2326 doc
: /* Get the current datagram address associated with PROCESS. */)
2328 Lisp_Object process
;
2332 CHECK_PROCESS (process
);
2334 if (!DATAGRAM_CONN_P (process
))
2337 channel
= XINT (XPROCESS (process
)->infd
);
2338 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2339 datagram_address
[channel
].len
);
2342 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2344 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2345 Returns nil upon error setting address, ADDRESS otherwise. */)
2347 Lisp_Object process
, address
;
2352 CHECK_PROCESS (process
);
2354 if (!DATAGRAM_CONN_P (process
))
2357 channel
= XINT (XPROCESS (process
)->infd
);
2359 len
= get_lisp_to_sockaddr_size (address
, &family
);
2360 if (datagram_address
[channel
].len
!= len
)
2362 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2368 static struct socket_options
{
2369 /* The name of this option. Should be lowercase version of option
2370 name without SO_ prefix. */
2372 /* Option level SOL_... */
2374 /* Option number SO_... */
2376 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2377 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2378 } socket_options
[] =
2380 #ifdef SO_BINDTODEVICE
2381 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2384 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2387 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2390 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2393 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2396 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2399 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2402 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2404 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2407 /* Set option OPT to value VAL on socket S.
2409 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2410 Signals an error if setting a known option fails.
2414 set_socket_option (s
, opt
, val
)
2416 Lisp_Object opt
, val
;
2419 struct socket_options
*sopt
;
2424 name
= (char *) SDATA (SYMBOL_NAME (opt
));
2425 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2426 if (strcmp (name
, sopt
->name
) == 0)
2429 switch (sopt
->opttype
)
2434 optval
= NILP (val
) ? 0 : 1;
2435 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2436 &optval
, sizeof (optval
));
2444 optval
= XINT (val
);
2446 error ("Bad option value for %s", name
);
2447 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2448 &optval
, sizeof (optval
));
2452 #ifdef SO_BINDTODEVICE
2455 char devname
[IFNAMSIZ
+1];
2457 /* This is broken, at least in the Linux 2.4 kernel.
2458 To unbind, the arg must be a zero integer, not the empty string.
2459 This should work on all systems. KFS. 2003-09-23. */
2460 bzero (devname
, sizeof devname
);
2463 char *arg
= (char *) SDATA (val
);
2464 int len
= min (strlen (arg
), IFNAMSIZ
);
2465 bcopy (arg
, devname
, len
);
2467 else if (!NILP (val
))
2468 error ("Bad option value for %s", name
);
2469 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2478 struct linger linger
;
2481 linger
.l_linger
= 0;
2483 linger
.l_linger
= XINT (val
);
2485 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2486 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2487 &linger
, sizeof (linger
));
2497 report_file_error ("Cannot set network option",
2498 Fcons (opt
, Fcons (val
, Qnil
)));
2499 return (1 << sopt
->optbit
);
2503 DEFUN ("set-network-process-option",
2504 Fset_network_process_option
, Sset_network_process_option
,
2506 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2507 See `make-network-process' for a list of options and values.
2508 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2509 OPTION is not a supported option, return nil instead; otherwise return t. */)
2510 (process
, option
, value
, no_error
)
2511 Lisp_Object process
, option
, value
;
2512 Lisp_Object no_error
;
2515 struct Lisp_Process
*p
;
2517 CHECK_PROCESS (process
);
2518 p
= XPROCESS (process
);
2519 if (!NETCONN1_P (p
))
2520 error ("Process is not a network process");
2524 error ("Process is not running");
2526 if (set_socket_option (s
, option
, value
))
2528 p
->childp
= Fplist_put (p
->childp
, option
, value
);
2532 if (NILP (no_error
))
2533 error ("Unknown or unsupported option");
2539 /* A version of request_sigio suitable for a record_unwind_protect. */
2542 unwind_request_sigio (dummy
)
2545 if (interrupt_input
)
2550 /* Create a network stream/datagram client/server process. Treated
2551 exactly like a normal process when reading and writing. Primary
2552 differences are in status display and process deletion. A network
2553 connection has no PID; you cannot signal it. All you can do is
2554 stop/continue it and deactivate/close it via delete-process */
2556 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2558 doc
: /* Create and return a network server or client process.
2560 In Emacs, network connections are represented by process objects, so
2561 input and output work as for subprocesses and `delete-process' closes
2562 a network connection. However, a network process has no process id,
2563 it cannot be signaled, and the status codes are different from normal
2566 Arguments are specified as keyword/argument pairs. The following
2567 arguments are defined:
2569 :name NAME -- NAME is name for process. It is modified if necessary
2572 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2573 with the process. Process output goes at end of that buffer, unless
2574 you specify an output stream or filter function to handle the output.
2575 BUFFER may be also nil, meaning that this process is not associated
2578 :host HOST -- HOST is name of the host to connect to, or its IP
2579 address. The symbol `local' specifies the local host. If specified
2580 for a server process, it must be a valid name or address for the local
2581 host, and only clients connecting to that address will be accepted.
2583 :service SERVICE -- SERVICE is name of the service desired, or an
2584 integer specifying a port number to connect to. If SERVICE is t,
2585 a random port number is selected for the server.
2587 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2588 stream type connection, `datagram' creates a datagram type connection.
2590 :family FAMILY -- FAMILY is the address (and protocol) family for the
2591 service specified by HOST and SERVICE. The default address family is
2592 Inet (or IPv4) for the host and port number specified by HOST and
2593 SERVICE. Other address families supported are:
2594 local -- for a local (i.e. UNIX) address specified by SERVICE.
2596 :local ADDRESS -- ADDRESS is the local address used for the connection.
2597 This parameter is ignored when opening a client process. When specified
2598 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2600 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2601 connection. This parameter is ignored when opening a stream server
2602 process. For a datagram server process, it specifies the initial
2603 setting of the remote datagram address. When specified for a client
2604 process, the FAMILY, HOST, and SERVICE args are ignored.
2606 The format of ADDRESS depends on the address family:
2607 - An IPv4 address is represented as an vector of integers [A B C D P]
2608 corresponding to numeric IP address A.B.C.D and port number P.
2609 - A local address is represented as a string with the address in the
2610 local address space.
2611 - An "unsupported family" address is represented by a cons (F . AV)
2612 where F is the family number and AV is a vector containing the socket
2613 address data with one element per address data byte. Do not rely on
2614 this format in portable code, as it may depend on implementation
2615 defined constants, data sizes, and data structure alignment.
2617 :coding CODING -- If CODING is a symbol, it specifies the coding
2618 system used for both reading and writing for this process. If CODING
2619 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2620 ENCODING is used for writing.
2622 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2623 return without waiting for the connection to complete; instead, the
2624 sentinel function will be called with second arg matching "open" (if
2625 successful) or "failed" when the connect completes. Default is to use
2626 a blocking connect (i.e. wait) for stream type connections.
2628 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2629 running when Emacs is exited.
2631 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2632 In the stopped state, a server process does not accept new
2633 connections, and a client process does not handle incoming traffic.
2634 The stopped state is cleared by `continue-process' and set by
2637 :filter FILTER -- Install FILTER as the process filter.
2639 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2640 process filter are multibyte, otherwise they are unibyte.
2641 If this keyword is not specified, the strings are multibyte iff
2642 `default-enable-multibyte-characters' is non-nil.
2644 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2646 :log LOG -- Install LOG as the server process log function. This
2647 function is called when the server accepts a network connection from a
2648 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2649 is the server process, CLIENT is the new process for the connection,
2650 and MESSAGE is a string.
2652 :plist PLIST -- Install PLIST as the new process' initial plist.
2654 :server QLEN -- if QLEN is non-nil, create a server process for the
2655 specified FAMILY, SERVICE, and connection type (stream or datagram).
2656 If QLEN is an integer, it is used as the max. length of the server's
2657 pending connection queue (also known as the backlog); the default
2658 queue length is 5. Default is to create a client process.
2660 The following network options can be specified for this connection:
2662 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2663 :dontroute BOOL -- Only send to directly connected hosts.
2664 :keepalive BOOL -- Send keep-alive messages on network stream.
2665 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2666 :oobinline BOOL -- Place out-of-band data in receive data stream.
2667 :priority INT -- Set protocol defined priority for sent packets.
2668 :reuseaddr BOOL -- Allow reusing a recently used local address
2669 (this is allowed by default for a server process).
2670 :bindtodevice NAME -- bind to interface NAME. Using this may require
2671 special privileges on some systems.
2673 Consult the relevant system programmer's manual pages for more
2674 information on using these options.
2677 A server process will listen for and accept connections from clients.
2678 When a client connection is accepted, a new network process is created
2679 for the connection with the following parameters:
2681 - The client's process name is constructed by concatenating the server
2682 process' NAME and a client identification string.
2683 - If the FILTER argument is non-nil, the client process will not get a
2684 separate process buffer; otherwise, the client's process buffer is a newly
2685 created buffer named after the server process' BUFFER name or process
2686 NAME concatenated with the client identification string.
2687 - The connection type and the process filter and sentinel parameters are
2688 inherited from the server process' TYPE, FILTER and SENTINEL.
2689 - The client process' contact info is set according to the client's
2690 addressing information (typically an IP address and a port number).
2691 - The client process' plist is initialized from the server's plist.
2693 Notice that the FILTER and SENTINEL args are never used directly by
2694 the server process. Also, the BUFFER argument is not used directly by
2695 the server process, but via the optional :log function, accepted (and
2696 failed) connections may be logged in the server process' buffer.
2698 The original argument list, modified with the actual connection
2699 information, is available via the `process-contact' function.
2701 usage: (make-network-process &rest ARGS) */)
2707 Lisp_Object contact
;
2708 struct Lisp_Process
*p
;
2709 #ifdef HAVE_GETADDRINFO
2710 struct addrinfo ai
, *res
, *lres
;
2711 struct addrinfo hints
;
2712 char *portstring
, portbuf
[128];
2713 #else /* HAVE_GETADDRINFO */
2714 struct _emacs_addrinfo
2720 struct sockaddr
*ai_addr
;
2721 struct _emacs_addrinfo
*ai_next
;
2723 #endif /* HAVE_GETADDRINFO */
2724 struct sockaddr_in address_in
;
2725 #ifdef HAVE_LOCAL_SOCKETS
2726 struct sockaddr_un address_un
;
2731 int s
= -1, outch
, inch
;
2732 struct gcpro gcpro1
;
2733 int count
= SPECPDL_INDEX ();
2735 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2737 Lisp_Object name
, buffer
, host
, service
, address
;
2738 Lisp_Object filter
, sentinel
;
2739 int is_non_blocking_client
= 0;
2740 int is_server
= 0, backlog
= 5;
2747 /* Save arguments for process-contact and clone-process. */
2748 contact
= Flist (nargs
, args
);
2752 /* Ensure socket support is loaded if available. */
2753 init_winsock (TRUE
);
2756 /* :type TYPE (nil: stream, datagram */
2757 tem
= Fplist_get (contact
, QCtype
);
2759 socktype
= SOCK_STREAM
;
2760 #ifdef DATAGRAM_SOCKETS
2761 else if (EQ (tem
, Qdatagram
))
2762 socktype
= SOCK_DGRAM
;
2765 error ("Unsupported connection type");
2768 tem
= Fplist_get (contact
, QCserver
);
2771 /* Don't support network sockets when non-blocking mode is
2772 not available, since a blocked Emacs is not useful. */
2773 #if defined(TERM) || (!defined(O_NONBLOCK) && !defined(O_NDELAY))
2774 error ("Network servers not supported");
2778 backlog
= XINT (tem
);
2782 /* Make QCaddress an alias for :local (server) or :remote (client). */
2783 QCaddress
= is_server
? QClocal
: QCremote
;
2786 if (!is_server
&& socktype
== SOCK_STREAM
2787 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2789 #ifndef NON_BLOCKING_CONNECT
2790 error ("Non-blocking connect not supported");
2792 is_non_blocking_client
= 1;
2796 name
= Fplist_get (contact
, QCname
);
2797 buffer
= Fplist_get (contact
, QCbuffer
);
2798 filter
= Fplist_get (contact
, QCfilter
);
2799 sentinel
= Fplist_get (contact
, QCsentinel
);
2801 CHECK_STRING (name
);
2804 /* Let's handle TERM before things get complicated ... */
2805 host
= Fplist_get (contact
, QChost
);
2806 CHECK_STRING (host
);
2808 service
= Fplist_get (contact
, QCservice
);
2809 if (INTEGERP (service
))
2810 port
= htons ((unsigned short) XINT (service
));
2813 struct servent
*svc_info
;
2814 CHECK_STRING (service
);
2815 svc_info
= getservbyname (SDATA (service
), "tcp");
2817 error ("Unknown service: %s", SDATA (service
));
2818 port
= svc_info
->s_port
;
2821 s
= connect_server (0);
2823 report_file_error ("error creating socket", Fcons (name
, Qnil
));
2824 send_command (s
, C_PORT
, 0, "%s:%d", SDATA (host
), ntohs (port
));
2825 send_command (s
, C_DUMB
, 1, 0);
2827 #else /* not TERM */
2829 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2830 ai
.ai_socktype
= socktype
;
2835 /* :local ADDRESS or :remote ADDRESS */
2836 address
= Fplist_get (contact
, QCaddress
);
2837 if (!NILP (address
))
2839 host
= service
= Qnil
;
2841 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
2842 error ("Malformed :address");
2843 ai
.ai_family
= family
;
2844 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
2845 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
2849 /* :family FAMILY -- nil (for Inet), local, or integer. */
2850 tem
= Fplist_get (contact
, QCfamily
);
2852 family
= XINT (tem
);
2857 #ifdef HAVE_LOCAL_SOCKETS
2858 else if (EQ (tem
, Qlocal
))
2863 error ("Unknown address family");
2864 ai
.ai_family
= family
;
2866 /* :service SERVICE -- string, integer (port number), or t (random port). */
2867 service
= Fplist_get (contact
, QCservice
);
2869 #ifdef HAVE_LOCAL_SOCKETS
2870 if (family
== AF_LOCAL
)
2872 /* Host is not used. */
2874 CHECK_STRING (service
);
2875 bzero (&address_un
, sizeof address_un
);
2876 address_un
.sun_family
= AF_LOCAL
;
2877 strncpy (address_un
.sun_path
, SDATA (service
), sizeof address_un
.sun_path
);
2878 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
2879 ai
.ai_addrlen
= sizeof address_un
;
2884 /* :host HOST -- hostname, ip address, or 'local for localhost. */
2885 host
= Fplist_get (contact
, QChost
);
2888 if (EQ (host
, Qlocal
))
2889 host
= build_string ("localhost");
2890 CHECK_STRING (host
);
2893 /* Slow down polling to every ten seconds.
2894 Some kernels have a bug which causes retrying connect to fail
2895 after a connect. Polling can interfere with gethostbyname too. */
2896 #ifdef POLL_FOR_INPUT
2897 if (socktype
== SOCK_STREAM
)
2899 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
2900 bind_polling_period (10);
2904 #ifdef HAVE_GETADDRINFO
2905 /* If we have a host, use getaddrinfo to resolve both host and service.
2906 Otherwise, use getservbyname to lookup the service. */
2910 /* SERVICE can either be a string or int.
2911 Convert to a C string for later use by getaddrinfo. */
2912 if (EQ (service
, Qt
))
2914 else if (INTEGERP (service
))
2916 sprintf (portbuf
, "%ld", (long) XINT (service
));
2917 portstring
= portbuf
;
2921 CHECK_STRING (service
);
2922 portstring
= SDATA (service
);
2927 memset (&hints
, 0, sizeof (hints
));
2929 hints
.ai_family
= NILP (Fplist_member (contact
, QCfamily
)) ? AF_UNSPEC
: family
;
2930 hints
.ai_socktype
= socktype
;
2931 hints
.ai_protocol
= 0;
2932 ret
= getaddrinfo (SDATA (host
), portstring
, &hints
, &res
);
2934 #ifdef HAVE_GAI_STRERROR
2935 error ("%s/%s %s", SDATA (host
), portstring
, gai_strerror(ret
));
2937 error ("%s/%s getaddrinfo error %d", SDATA (host
), portstring
, ret
);
2943 #endif /* HAVE_GETADDRINFO */
2945 /* We end up here if getaddrinfo is not defined, or in case no hostname
2946 has been specified (e.g. for a local server process). */
2948 if (EQ (service
, Qt
))
2950 else if (INTEGERP (service
))
2951 port
= htons ((unsigned short) XINT (service
));
2954 struct servent
*svc_info
;
2955 CHECK_STRING (service
);
2956 svc_info
= getservbyname (SDATA (service
),
2957 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
2959 error ("Unknown service: %s", SDATA (service
));
2960 port
= svc_info
->s_port
;
2963 bzero (&address_in
, sizeof address_in
);
2964 address_in
.sin_family
= family
;
2965 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
2966 address_in
.sin_port
= port
;
2968 #ifndef HAVE_GETADDRINFO
2971 struct hostent
*host_info_ptr
;
2973 /* gethostbyname may fail with TRY_AGAIN, but we don't honour that,
2974 as it may `hang' Emacs for a very long time. */
2977 host_info_ptr
= gethostbyname (SDATA (host
));
2982 bcopy (host_info_ptr
->h_addr
, (char *) &address_in
.sin_addr
,
2983 host_info_ptr
->h_length
);
2984 family
= host_info_ptr
->h_addrtype
;
2985 address_in
.sin_family
= family
;
2988 /* Attempt to interpret host as numeric inet address */
2990 IN_ADDR numeric_addr
;
2991 numeric_addr
= inet_addr ((char *) SDATA (host
));
2992 if (NUMERIC_ADDR_ERROR
)
2993 error ("Unknown host \"%s\"", SDATA (host
));
2995 bcopy ((char *)&numeric_addr
, (char *) &address_in
.sin_addr
,
2996 sizeof (address_in
.sin_addr
));
3000 #endif /* not HAVE_GETADDRINFO */
3002 ai
.ai_family
= family
;
3003 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3004 ai
.ai_addrlen
= sizeof address_in
;
3008 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
3009 when connect is interrupted. So let's not let it get interrupted.
3010 Note we do not turn off polling, because polling is only used
3011 when not interrupt_input, and thus not normally used on the systems
3012 which have this bug. On systems which use polling, there's no way
3013 to quit if polling is turned off. */
3015 && !is_server
&& socktype
== SOCK_STREAM
)
3017 /* Comment from KFS: The original open-network-stream code
3018 didn't unwind protect this, but it seems like the proper
3019 thing to do. In any case, I don't see how it could harm to
3020 do this -- and it makes cleanup (using unbind_to) easier. */
3021 record_unwind_protect (unwind_request_sigio
, Qnil
);
3025 /* Do this in case we never enter the for-loop below. */
3026 count1
= SPECPDL_INDEX ();
3029 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3035 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3042 #ifdef DATAGRAM_SOCKETS
3043 if (!is_server
&& socktype
== SOCK_DGRAM
)
3045 #endif /* DATAGRAM_SOCKETS */
3047 #ifdef NON_BLOCKING_CONNECT
3048 if (is_non_blocking_client
)
3051 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3053 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3065 /* Make us close S if quit. */
3066 record_unwind_protect (close_file_unwind
, make_number (s
));
3068 /* Parse network options in the arg list.
3069 We simply ignore anything which isn't a known option (including other keywords).
3070 An error is signalled if setting a known option fails. */
3071 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3072 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3076 /* Configure as a server socket. */
3078 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3079 explicit :reuseaddr key to override this. */
3080 #ifdef HAVE_LOCAL_SOCKETS
3081 if (family
!= AF_LOCAL
)
3083 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3086 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3087 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3090 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3091 report_file_error ("Cannot bind server socket", Qnil
);
3093 #ifdef HAVE_GETSOCKNAME
3094 if (EQ (service
, Qt
))
3096 struct sockaddr_in sa1
;
3097 int len1
= sizeof (sa1
);
3098 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3100 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3101 service
= make_number (ntohs (sa1
.sin_port
));
3102 contact
= Fplist_put (contact
, QCservice
, service
);
3107 if (socktype
== SOCK_STREAM
&& listen (s
, backlog
))
3108 report_file_error ("Cannot listen on server socket", Qnil
);
3116 /* This turns off all alarm-based interrupts; the
3117 bind_polling_period call above doesn't always turn all the
3118 short-interval ones off, especially if interrupt_input is
3121 It'd be nice to be able to control the connect timeout
3122 though. Would non-blocking connect calls be portable?
3124 This used to be conditioned by HAVE_GETADDRINFO. Why? */
3126 turn_on_atimers (0);
3128 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3131 turn_on_atimers (1);
3133 if (ret
== 0 || xerrno
== EISCONN
)
3135 /* The unwind-protect will be discarded afterwards.
3136 Likewise for immediate_quit. */
3140 #ifdef NON_BLOCKING_CONNECT
3142 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3146 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3154 /* Discard the unwind protect closing S. */
3155 specpdl_ptr
= specpdl
+ count1
;
3159 if (xerrno
== EINTR
)
3165 #ifdef DATAGRAM_SOCKETS
3166 if (socktype
== SOCK_DGRAM
)
3168 if (datagram_address
[s
].sa
)
3170 datagram_address
[s
].sa
= (struct sockaddr
*) xmalloc (lres
->ai_addrlen
);
3171 datagram_address
[s
].len
= lres
->ai_addrlen
;
3175 bzero (datagram_address
[s
].sa
, lres
->ai_addrlen
);
3176 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3179 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3180 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3181 conv_lisp_to_sockaddr (rfamily
, remote
,
3182 datagram_address
[s
].sa
, rlen
);
3186 bcopy (lres
->ai_addr
, datagram_address
[s
].sa
, lres
->ai_addrlen
);
3189 contact
= Fplist_put (contact
, QCaddress
,
3190 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3191 #ifdef HAVE_GETSOCKNAME
3194 struct sockaddr_in sa1
;
3195 int len1
= sizeof (sa1
);
3196 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3197 contact
= Fplist_put (contact
, QClocal
,
3198 conv_sockaddr_to_lisp (&sa1
, len1
));
3203 #ifdef HAVE_GETADDRINFO
3210 /* Discard the unwind protect for closing S, if any. */
3211 specpdl_ptr
= specpdl
+ count1
;
3213 /* Unwind bind_polling_period and request_sigio. */
3214 unbind_to (count
, Qnil
);
3218 /* If non-blocking got this far - and failed - assume non-blocking is
3219 not supported after all. This is probably a wrong assumption, but
3220 the normal blocking calls to open-network-stream handles this error
3222 if (is_non_blocking_client
)
3227 report_file_error ("make server process failed", contact
);
3229 report_file_error ("make client process failed", contact
);
3232 #endif /* not TERM */
3238 buffer
= Fget_buffer_create (buffer
);
3239 proc
= make_process (name
);
3241 chan_process
[inch
] = proc
;
3244 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3247 fcntl (inch
, F_SETFL
, O_NDELAY
);
3251 p
= XPROCESS (proc
);
3253 p
->childp
= contact
;
3254 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
3257 p
->sentinel
= sentinel
;
3259 p
->filter_multibyte
= buffer_defaults
.enable_multibyte_characters
;
3260 /* Override the above only if :filter-multibyte is specified. */
3261 if (! NILP (Fplist_member (contact
, QCfilter_multibyte
)))
3262 p
->filter_multibyte
= Fplist_get (contact
, QCfilter_multibyte
);
3263 p
->log
= Fplist_get (contact
, QClog
);
3264 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3265 p
->kill_without_query
= Qt
;
3266 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3269 XSETINT (p
->infd
, inch
);
3270 XSETINT (p
->outfd
, outch
);
3271 if (is_server
&& socktype
== SOCK_STREAM
)
3272 p
->status
= Qlisten
;
3274 #ifdef NON_BLOCKING_CONNECT
3275 if (is_non_blocking_client
)
3277 /* We may get here if connect did succeed immediately. However,
3278 in that case, we still need to signal this like a non-blocking
3280 p
->status
= Qconnect
;
3281 if (!FD_ISSET (inch
, &connect_wait_mask
))
3283 FD_SET (inch
, &connect_wait_mask
);
3284 num_pending_connects
++;
3289 /* A server may have a client filter setting of Qt, but it must
3290 still listen for incoming connects unless it is stopped. */
3291 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3292 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3294 FD_SET (inch
, &input_wait_mask
);
3295 FD_SET (inch
, &non_keyboard_wait_mask
);
3298 if (inch
> max_process_desc
)
3299 max_process_desc
= inch
;
3301 tem
= Fplist_member (contact
, QCcoding
);
3302 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3303 tem
= Qnil
; /* No error message (too late!). */
3306 /* Setup coding systems for communicating with the network stream. */
3307 struct gcpro gcpro1
;
3308 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3309 Lisp_Object coding_systems
= Qt
;
3310 Lisp_Object args
[5], val
;
3314 val
= XCAR (XCDR (tem
));
3318 else if (!NILP (Vcoding_system_for_read
))
3319 val
= Vcoding_system_for_read
;
3320 else if ((!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
))
3321 || (NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
)))
3322 /* We dare not decode end-of-line format by setting VAL to
3323 Qraw_text, because the existing Emacs Lisp libraries
3324 assume that they receive bare code including a sequene of
3329 if (NILP (host
) || NILP (service
))
3330 coding_systems
= Qnil
;
3333 args
[0] = Qopen_network_stream
, args
[1] = name
,
3334 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3336 coding_systems
= Ffind_operation_coding_system (5, args
);
3339 if (CONSP (coding_systems
))
3340 val
= XCAR (coding_systems
);
3341 else if (CONSP (Vdefault_process_coding_system
))
3342 val
= XCAR (Vdefault_process_coding_system
);
3346 p
->decode_coding_system
= val
;
3350 val
= XCAR (XCDR (tem
));
3354 else if (!NILP (Vcoding_system_for_write
))
3355 val
= Vcoding_system_for_write
;
3356 else if (NILP (current_buffer
->enable_multibyte_characters
))
3360 if (EQ (coding_systems
, Qt
))
3362 if (NILP (host
) || NILP (service
))
3363 coding_systems
= Qnil
;
3366 args
[0] = Qopen_network_stream
, args
[1] = name
,
3367 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3369 coding_systems
= Ffind_operation_coding_system (5, args
);
3373 if (CONSP (coding_systems
))
3374 val
= XCDR (coding_systems
);
3375 else if (CONSP (Vdefault_process_coding_system
))
3376 val
= XCDR (Vdefault_process_coding_system
);
3380 p
->encode_coding_system
= val
;
3382 setup_process_coding_systems (proc
);
3384 p
->decoding_buf
= make_uninit_string (0);
3385 p
->decoding_carryover
= make_number (0);
3386 p
->encoding_buf
= make_uninit_string (0);
3387 p
->encoding_carryover
= make_number (0);
3389 p
->inherit_coding_system_flag
3390 = (!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
3396 #endif /* HAVE_SOCKETS */
3399 #if defined(HAVE_SOCKETS) && defined(HAVE_NET_IF_H) && defined(HAVE_SYS_IOCTL_H)
3402 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3403 doc
: /* Return an alist of all network interfaces and their network address.
3404 Each element is a cons, the car of which is a string containing the
3405 interface name, and the cdr is the network address in internal
3406 format; see the description of ADDRESS in `make-network-process'. */)
3409 struct ifconf ifconf
;
3410 struct ifreq
*ifreqs
= NULL
;
3415 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3421 buf_size
= ifaces
* sizeof(ifreqs
[0]);
3422 ifreqs
= (struct ifreq
*)xrealloc(ifreqs
, buf_size
);
3429 ifconf
.ifc_len
= buf_size
;
3430 ifconf
.ifc_req
= ifreqs
;
3431 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3437 if (ifconf
.ifc_len
== buf_size
)
3441 ifaces
= ifconf
.ifc_len
/ sizeof (ifreqs
[0]);
3444 while (--ifaces
>= 0)
3446 struct ifreq
*ifq
= &ifreqs
[ifaces
];
3447 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3448 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3450 bcopy (ifq
->ifr_name
, namebuf
, sizeof (ifq
->ifr_name
));
3451 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3452 res
= Fcons (Fcons (build_string (namebuf
),
3453 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3454 sizeof (struct sockaddr
))),
3460 #endif /* SIOCGIFCONF */
3462 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
3469 static struct ifflag_def ifflag_table
[] = {
3473 #ifdef IFF_BROADCAST
3474 { IFF_BROADCAST
, "broadcast" },
3477 { IFF_DEBUG
, "debug" },
3480 { IFF_LOOPBACK
, "loopback" },
3482 #ifdef IFF_POINTOPOINT
3483 { IFF_POINTOPOINT
, "pointopoint" },
3486 { IFF_RUNNING
, "running" },
3489 { IFF_NOARP
, "noarp" },
3492 { IFF_PROMISC
, "promisc" },
3494 #ifdef IFF_NOTRAILERS
3495 { IFF_NOTRAILERS
, "notrailers" },
3498 { IFF_ALLMULTI
, "allmulti" },
3501 { IFF_MASTER
, "master" },
3504 { IFF_SLAVE
, "slave" },
3506 #ifdef IFF_MULTICAST
3507 { IFF_MULTICAST
, "multicast" },
3510 { IFF_PORTSEL
, "portsel" },
3512 #ifdef IFF_AUTOMEDIA
3513 { IFF_AUTOMEDIA
, "automedia" },
3516 { IFF_DYNAMIC
, "dynamic" },
3521 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3522 doc
: /* Return information about network interface named IFNAME.
3523 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3524 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3525 NETMASK is the layer 3 network mask, HWADDR is the layer 2 addres, and
3526 FLAGS is the current flags of the interface. */)
3531 Lisp_Object res
= Qnil
;
3536 CHECK_STRING (ifname
);
3538 bzero (rq
.ifr_name
, sizeof rq
.ifr_name
);
3539 strncpy (rq
.ifr_name
, SDATA (ifname
), sizeof (rq
.ifr_name
));
3541 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3546 #if defined(SIOCGIFFLAGS) && defined(HAVE_STRUCT_IFREQ_IFR_FLAGS)
3547 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3549 int flags
= rq
.ifr_flags
;
3550 struct ifflag_def
*fp
;
3554 for (fp
= ifflag_table
; flags
!= 0 && fp
; fp
++)
3556 if (flags
& fp
->flag_bit
)
3558 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3559 flags
-= fp
->flag_bit
;
3562 for (fnum
= 0; flags
&& fnum
< 32; fnum
++)
3564 if (flags
& (1 << fnum
))
3566 elt
= Fcons (make_number (fnum
), elt
);
3571 res
= Fcons (elt
, res
);
3574 #if defined(SIOCGIFHWADDR) && defined(HAVE_STRUCT_IFREQ_IFR_HWADDR)
3575 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3577 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3578 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3582 for (n
= 0; n
< 6; n
++)
3583 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3584 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3587 res
= Fcons (elt
, res
);
3590 #if defined(SIOCGIFNETMASK) && defined(ifr_netmask)
3591 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3594 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3597 res
= Fcons (elt
, res
);
3600 #if defined(SIOCGIFBRDADDR) && defined(HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3601 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3604 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3607 res
= Fcons (elt
, res
);
3610 #if defined(SIOCGIFADDR) && defined(HAVE_STRUCT_IFREQ_IFR_ADDR)
3611 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3614 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3617 res
= Fcons (elt
, res
);
3621 return any
? res
: Qnil
;
3624 #endif /* HAVE_SOCKETS */
3626 /* Turn off input and output for process PROC. */
3629 deactivate_process (proc
)
3632 register int inchannel
, outchannel
;
3633 register struct Lisp_Process
*p
= XPROCESS (proc
);
3635 inchannel
= XINT (p
->infd
);
3636 outchannel
= XINT (p
->outfd
);
3638 #ifdef ADAPTIVE_READ_BUFFERING
3639 if (XINT (p
->read_output_delay
) > 0)
3641 if (--process_output_delay_count
< 0)
3642 process_output_delay_count
= 0;
3643 XSETINT (p
->read_output_delay
, 0);
3644 p
->read_output_skip
= Qnil
;
3650 /* Beware SIGCHLD hereabouts. */
3651 flush_pending_output (inchannel
);
3654 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
3655 sys$
dassgn (outchannel
);
3656 vs
= get_vms_process_pointer (p
->pid
);
3658 give_back_vms_process_stuff (vs
);
3661 emacs_close (inchannel
);
3662 if (outchannel
>= 0 && outchannel
!= inchannel
)
3663 emacs_close (outchannel
);
3666 XSETINT (p
->infd
, -1);
3667 XSETINT (p
->outfd
, -1);
3668 #ifdef DATAGRAM_SOCKETS
3669 if (DATAGRAM_CHAN_P (inchannel
))
3671 xfree (datagram_address
[inchannel
].sa
);
3672 datagram_address
[inchannel
].sa
= 0;
3673 datagram_address
[inchannel
].len
= 0;
3676 chan_process
[inchannel
] = Qnil
;
3677 FD_CLR (inchannel
, &input_wait_mask
);
3678 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3679 #ifdef NON_BLOCKING_CONNECT
3680 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3682 FD_CLR (inchannel
, &connect_wait_mask
);
3683 if (--num_pending_connects
< 0)
3687 if (inchannel
== max_process_desc
)
3690 /* We just closed the highest-numbered process input descriptor,
3691 so recompute the highest-numbered one now. */
3692 max_process_desc
= 0;
3693 for (i
= 0; i
< MAXDESC
; i
++)
3694 if (!NILP (chan_process
[i
]))
3695 max_process_desc
= i
;
3700 /* Close all descriptors currently in use for communication
3701 with subprocess. This is used in a newly-forked subprocess
3702 to get rid of irrelevant descriptors. */
3705 close_process_descs ()
3709 for (i
= 0; i
< MAXDESC
; i
++)
3711 Lisp_Object process
;
3712 process
= chan_process
[i
];
3713 if (!NILP (process
))
3715 int in
= XINT (XPROCESS (process
)->infd
);
3716 int out
= XINT (XPROCESS (process
)->outfd
);
3719 if (out
>= 0 && in
!= out
)
3726 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3728 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3729 It is read into the process' buffers or given to their filter functions.
3730 Non-nil arg PROCESS means do not return until some output has been received
3732 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of
3733 seconds and microseconds to wait; return after that much time whether
3734 or not there is input.
3735 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
3736 from PROCESS, suspending reading output from other processes.
3737 If JUST-THIS-ONE is an integer, don't run any timers either.
3738 Return non-nil iff we received any output before the timeout expired. */)
3739 (process
, timeout
, timeout_msecs
, just_this_one
)
3740 register Lisp_Object process
, timeout
, timeout_msecs
, just_this_one
;
3745 if (! NILP (process
))
3746 CHECK_PROCESS (process
);
3748 just_this_one
= Qnil
;
3750 if (! NILP (timeout_msecs
))
3752 CHECK_NUMBER (timeout_msecs
);
3753 useconds
= XINT (timeout_msecs
);
3754 if (!INTEGERP (timeout
))
3755 XSETINT (timeout
, 0);
3758 int carry
= useconds
/ 1000000;
3760 XSETINT (timeout
, XINT (timeout
) + carry
);
3761 useconds
-= carry
* 1000000;
3763 /* I think this clause is necessary because C doesn't
3764 guarantee a particular rounding direction for negative
3768 XSETINT (timeout
, XINT (timeout
) - 1);
3769 useconds
+= 1000000;
3776 if (! NILP (timeout
))
3778 CHECK_NUMBER (timeout
);
3779 seconds
= XINT (timeout
);
3780 if (seconds
< 0 || (seconds
== 0 && useconds
== 0))
3784 seconds
= NILP (process
) ? -1 : 0;
3787 (wait_reading_process_output (seconds
, useconds
, 0, 0,
3789 !NILP (process
) ? XPROCESS (process
) : NULL
,
3790 NILP (just_this_one
) ? 0 :
3791 !INTEGERP (just_this_one
) ? 1 : -1)
3795 /* Accept a connection for server process SERVER on CHANNEL. */
3797 static int connect_counter
= 0;
3800 server_accept_connection (server
, channel
)
3804 Lisp_Object proc
, caller
, name
, buffer
;
3805 Lisp_Object contact
, host
, service
;
3806 struct Lisp_Process
*ps
= XPROCESS (server
);
3807 struct Lisp_Process
*p
;
3811 struct sockaddr_in in
;
3812 #ifdef HAVE_LOCAL_SOCKETS
3813 struct sockaddr_un un
;
3816 int len
= sizeof saddr
;
3818 s
= accept (channel
, &saddr
.sa
, &len
);
3827 if (code
== EWOULDBLOCK
)
3831 if (!NILP (ps
->log
))
3832 call3 (ps
->log
, server
, Qnil
,
3833 concat3 (build_string ("accept failed with code"),
3834 Fnumber_to_string (make_number (code
)),
3835 build_string ("\n")));
3841 /* Setup a new process to handle the connection. */
3843 /* Generate a unique identification of the caller, and build contact
3844 information for this process. */
3847 switch (saddr
.sa
.sa_family
)
3851 Lisp_Object args
[5];
3852 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
3853 args
[0] = build_string ("%d.%d.%d.%d");
3854 args
[1] = make_number (*ip
++);
3855 args
[2] = make_number (*ip
++);
3856 args
[3] = make_number (*ip
++);
3857 args
[4] = make_number (*ip
++);
3858 host
= Fformat (5, args
);
3859 service
= make_number (ntohs (saddr
.in
.sin_port
));
3861 args
[0] = build_string (" <%s:%d>");
3864 caller
= Fformat (3, args
);
3868 #ifdef HAVE_LOCAL_SOCKETS
3872 caller
= Fnumber_to_string (make_number (connect_counter
));
3873 caller
= concat3 (build_string (" <*"), caller
, build_string ("*>"));
3877 /* Create a new buffer name for this process if it doesn't have a
3878 filter. The new buffer name is based on the buffer name or
3879 process name of the server process concatenated with the caller
3882 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
3886 buffer
= ps
->buffer
;
3888 buffer
= Fbuffer_name (buffer
);
3893 buffer
= concat2 (buffer
, caller
);
3894 buffer
= Fget_buffer_create (buffer
);
3898 /* Generate a unique name for the new server process. Combine the
3899 server process name with the caller identification. */
3901 name
= concat2 (ps
->name
, caller
);
3902 proc
= make_process (name
);
3904 chan_process
[s
] = proc
;
3907 fcntl (s
, F_SETFL
, O_NONBLOCK
);
3910 fcntl (s
, F_SETFL
, O_NDELAY
);
3914 p
= XPROCESS (proc
);
3916 /* Build new contact information for this setup. */
3917 contact
= Fcopy_sequence (ps
->childp
);
3918 contact
= Fplist_put (contact
, QCserver
, Qnil
);
3919 contact
= Fplist_put (contact
, QChost
, host
);
3920 if (!NILP (service
))
3921 contact
= Fplist_put (contact
, QCservice
, service
);
3922 contact
= Fplist_put (contact
, QCremote
,
3923 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
3924 #ifdef HAVE_GETSOCKNAME
3926 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
3927 contact
= Fplist_put (contact
, QClocal
,
3928 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
3931 p
->childp
= contact
;
3932 p
->plist
= Fcopy_sequence (ps
->plist
);
3935 p
->sentinel
= ps
->sentinel
;
3936 p
->filter
= ps
->filter
;
3939 XSETINT (p
->infd
, s
);
3940 XSETINT (p
->outfd
, s
);
3943 /* Client processes for accepted connections are not stopped initially. */
3944 if (!EQ (p
->filter
, Qt
))
3946 FD_SET (s
, &input_wait_mask
);
3947 FD_SET (s
, &non_keyboard_wait_mask
);
3950 if (s
> max_process_desc
)
3951 max_process_desc
= s
;
3953 /* Setup coding system for new process based on server process.
3954 This seems to be the proper thing to do, as the coding system
3955 of the new process should reflect the settings at the time the
3956 server socket was opened; not the current settings. */
3958 p
->decode_coding_system
= ps
->decode_coding_system
;
3959 p
->encode_coding_system
= ps
->encode_coding_system
;
3960 setup_process_coding_systems (proc
);
3962 p
->decoding_buf
= make_uninit_string (0);
3963 p
->decoding_carryover
= make_number (0);
3964 p
->encoding_buf
= make_uninit_string (0);
3965 p
->encoding_carryover
= make_number (0);
3967 p
->inherit_coding_system_flag
3968 = (NILP (buffer
) ? Qnil
: ps
->inherit_coding_system_flag
);
3970 if (!NILP (ps
->log
))
3971 call3 (ps
->log
, server
, proc
,
3972 concat3 (build_string ("accept from "),
3973 (STRINGP (host
) ? host
: build_string ("-")),
3974 build_string ("\n")));
3976 if (!NILP (p
->sentinel
))
3977 exec_sentinel (proc
,
3978 concat3 (build_string ("open from "),
3979 (STRINGP (host
) ? host
: build_string ("-")),
3980 build_string ("\n")));
3983 /* This variable is different from waiting_for_input in keyboard.c.
3984 It is used to communicate to a lisp process-filter/sentinel (via the
3985 function Fwaiting_for_user_input_p below) whether Emacs was waiting
3986 for user-input when that process-filter was called.
3987 waiting_for_input cannot be used as that is by definition 0 when
3988 lisp code is being evalled.
3989 This is also used in record_asynch_buffer_change.
3990 For that purpose, this must be 0
3991 when not inside wait_reading_process_output. */
3992 static int waiting_for_user_input_p
;
3994 /* This is here so breakpoints can be put on it. */
3996 wait_reading_process_output_1 ()
4000 /* Read and dispose of subprocess output while waiting for timeout to
4001 elapse and/or keyboard input to be available.
4004 timeout in seconds, or
4005 zero for no limit, or
4006 -1 means gobble data immediately available but don't wait for any.
4009 an additional duration to wait, measured in microseconds.
4010 If this is nonzero and time_limit is 0, then the timeout
4011 consists of MICROSECS only.
4013 READ_KBD is a lisp value:
4014 0 to ignore keyboard input, or
4015 1 to return when input is available, or
4016 -1 meaning caller will actually read the input, so don't throw to
4017 the quit handler, or
4019 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4020 output that arrives.
4022 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4023 (and gobble terminal input into the buffer if any arrives).
4025 If WAIT_PROC is specified, wait until something arrives from that
4026 process. The return value is true iff we read some input from
4029 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4030 (suspending output from other processes). A negative value
4031 means don't run any timers either.
4033 If WAIT_PROC is specified, then the function returns true iff we
4034 received input from that process before the timeout elapsed.
4035 Otherwise, return true iff we received input from any process. */
4038 wait_reading_process_output (time_limit
, microsecs
, read_kbd
, do_display
,
4039 wait_for_cell
, wait_proc
, just_wait_proc
)
4040 int time_limit
, microsecs
, read_kbd
, do_display
;
4041 Lisp_Object wait_for_cell
;
4042 struct Lisp_Process
*wait_proc
;
4045 register int channel
, nfds
;
4046 SELECT_TYPE Available
;
4047 #ifdef NON_BLOCKING_CONNECT
4048 SELECT_TYPE Connecting
;
4051 int check_delay
, no_avail
;
4054 EMACS_TIME timeout
, end_time
;
4055 int wait_channel
= -1;
4056 int got_some_input
= 0;
4057 /* Either nil or a cons cell, the car of which is of interest and
4058 may be changed outside of this routine. */
4059 int saved_waiting_for_user_input_p
= waiting_for_user_input_p
;
4061 FD_ZERO (&Available
);
4062 #ifdef NON_BLOCKING_CONNECT
4063 FD_ZERO (&Connecting
);
4066 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4067 if (wait_proc
!= NULL
)
4068 wait_channel
= XINT (wait_proc
->infd
);
4070 waiting_for_user_input_p
= read_kbd
;
4072 /* Since we may need to wait several times,
4073 compute the absolute time to return at. */
4074 if (time_limit
|| microsecs
)
4076 EMACS_GET_TIME (end_time
);
4077 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4078 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4080 #ifdef POLL_INTERRUPTED_SYS_CALL
4081 /* AlainF 5-Jul-1996
4082 HP-UX 10.10 seem to have problems with signals coming in
4083 Causes "poll: interrupted system call" messages when Emacs is run
4085 Turn off periodic alarms (in case they are in use),
4086 and then turn off any other atimers. */
4088 turn_on_atimers (0);
4089 #endif /* POLL_INTERRUPTED_SYS_CALL */
4093 int timeout_reduced_for_timers
= 0;
4095 /* If calling from keyboard input, do not quit
4096 since we want to return C-g as an input character.
4097 Otherwise, do pending quit if requested. */
4101 else if (interrupt_input_pending
)
4102 handle_async_input ();
4105 /* Exit now if the cell we're waiting for became non-nil. */
4106 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4109 /* Compute time from now till when time limit is up */
4110 /* Exit if already run out */
4111 if (time_limit
== -1)
4113 /* -1 specified for timeout means
4114 gobble output available now
4115 but don't wait at all. */
4117 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4119 else if (time_limit
|| microsecs
)
4121 EMACS_GET_TIME (timeout
);
4122 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4123 if (EMACS_TIME_NEG_P (timeout
))
4128 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4131 /* Normally we run timers here.
4132 But not if wait_for_cell; in those cases,
4133 the wait is supposed to be short,
4134 and those callers cannot handle running arbitrary Lisp code here. */
4135 if (NILP (wait_for_cell
)
4136 && just_wait_proc
>= 0)
4138 EMACS_TIME timer_delay
;
4142 int old_timers_run
= timers_run
;
4143 struct buffer
*old_buffer
= current_buffer
;
4145 timer_delay
= timer_check (1);
4147 /* If a timer has run, this might have changed buffers
4148 an alike. Make read_key_sequence aware of that. */
4149 if (timers_run
!= old_timers_run
4150 && old_buffer
!= current_buffer
4151 && waiting_for_user_input_p
== -1)
4152 record_asynch_buffer_change ();
4154 if (timers_run
!= old_timers_run
&& do_display
)
4155 /* We must retry, since a timer may have requeued itself
4156 and that could alter the time_delay. */
4157 redisplay_preserve_echo_area (9);
4161 while (!detect_input_pending ());
4163 /* If there is unread keyboard input, also return. */
4165 && requeued_events_pending_p ())
4168 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4170 EMACS_TIME difference
;
4171 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4172 if (EMACS_TIME_NEG_P (difference
))
4174 timeout
= timer_delay
;
4175 timeout_reduced_for_timers
= 1;
4178 /* If time_limit is -1, we are not going to wait at all. */
4179 else if (time_limit
!= -1)
4181 /* This is so a breakpoint can be put here. */
4182 wait_reading_process_output_1 ();
4186 /* Cause C-g and alarm signals to take immediate action,
4187 and cause input available signals to zero out timeout.
4189 It is important that we do this before checking for process
4190 activity. If we get a SIGCHLD after the explicit checks for
4191 process activity, timeout is the only way we will know. */
4193 set_waiting_for_input (&timeout
);
4195 /* If status of something has changed, and no input is
4196 available, notify the user of the change right away. After
4197 this explicit check, we'll let the SIGCHLD handler zap
4198 timeout to get our attention. */
4199 if (update_tick
!= process_tick
&& do_display
)
4202 #ifdef NON_BLOCKING_CONNECT
4206 Atemp
= input_wait_mask
;
4208 /* On Mac OS X 10.0, the SELECT system call always says input is
4209 present (for reading) at stdin, even when none is. This
4210 causes the call to SELECT below to return 1 and
4211 status_notify not to be called. As a result output of
4212 subprocesses are incorrectly discarded.
4216 IF_NON_BLOCKING_CONNECT (Ctemp
= connect_wait_mask
);
4218 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4219 if ((select (max (max_process_desc
, max_keyboard_desc
) + 1,
4221 #ifdef NON_BLOCKING_CONNECT
4222 (num_pending_connects
> 0 ? &Ctemp
: (SELECT_TYPE
*)0),
4226 (SELECT_TYPE
*)0, &timeout
)
4229 /* It's okay for us to do this and then continue with
4230 the loop, since timeout has already been zeroed out. */
4231 clear_waiting_for_input ();
4232 status_notify (NULL
);
4236 /* Don't wait for output from a non-running process. Just
4237 read whatever data has already been received. */
4238 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
4239 update_status (wait_proc
);
4241 && ! EQ (wait_proc
->status
, Qrun
)
4242 && ! EQ (wait_proc
->status
, Qconnect
))
4244 int nread
, total_nread
= 0;
4246 clear_waiting_for_input ();
4247 XSETPROCESS (proc
, wait_proc
);
4249 /* Read data from the process, until we exhaust it. */
4250 while (XINT (wait_proc
->infd
) >= 0)
4252 nread
= read_process_output (proc
, XINT (wait_proc
->infd
));
4258 total_nread
+= nread
;
4260 else if (nread
== -1 && EIO
== errno
)
4264 else if (nread
== -1 && EAGAIN
== errno
)
4268 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4272 if (total_nread
> 0 && do_display
)
4273 redisplay_preserve_echo_area (10);
4278 /* Wait till there is something to do */
4280 if (wait_proc
&& just_wait_proc
)
4282 if (XINT (wait_proc
->infd
) < 0) /* Terminated */
4284 FD_SET (XINT (wait_proc
->infd
), &Available
);
4286 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4288 else if (!NILP (wait_for_cell
))
4290 Available
= non_process_wait_mask
;
4292 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4297 Available
= non_keyboard_wait_mask
;
4299 Available
= input_wait_mask
;
4300 IF_NON_BLOCKING_CONNECT (check_connect
= (num_pending_connects
> 0));
4301 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4304 /* If frame size has changed or the window is newly mapped,
4305 redisplay now, before we start to wait. There is a race
4306 condition here; if a SIGIO arrives between now and the select
4307 and indicates that a frame is trashed, the select may block
4308 displaying a trashed screen. */
4309 if (frame_garbaged
&& do_display
)
4311 clear_waiting_for_input ();
4312 redisplay_preserve_echo_area (11);
4314 set_waiting_for_input (&timeout
);
4318 if (read_kbd
&& detect_input_pending ())
4325 #ifdef NON_BLOCKING_CONNECT
4327 Connecting
= connect_wait_mask
;
4330 #ifdef ADAPTIVE_READ_BUFFERING
4331 /* Set the timeout for adaptive read buffering if any
4332 process has non-nil read_output_skip and non-zero
4333 read_output_delay, and we are not reading output for a
4334 specific wait_channel. It is not executed if
4335 Vprocess_adaptive_read_buffering is nil. */
4336 if (process_output_skip
&& check_delay
> 0)
4338 int usecs
= EMACS_USECS (timeout
);
4339 if (EMACS_SECS (timeout
) > 0 || usecs
> READ_OUTPUT_DELAY_MAX
)
4340 usecs
= READ_OUTPUT_DELAY_MAX
;
4341 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4343 proc
= chan_process
[channel
];
4346 /* Find minimum non-zero read_output_delay among the
4347 processes with non-nil read_output_skip. */
4348 if (XINT (XPROCESS (proc
)->read_output_delay
) > 0)
4351 if (NILP (XPROCESS (proc
)->read_output_skip
))
4353 FD_CLR (channel
, &Available
);
4354 XPROCESS (proc
)->read_output_skip
= Qnil
;
4355 if (XINT (XPROCESS (proc
)->read_output_delay
) < usecs
)
4356 usecs
= XINT (XPROCESS (proc
)->read_output_delay
);
4359 EMACS_SET_SECS_USECS (timeout
, 0, usecs
);
4360 process_output_skip
= 0;
4364 nfds
= select (max (max_process_desc
, max_keyboard_desc
) + 1,
4366 #ifdef NON_BLOCKING_CONNECT
4367 (check_connect
? &Connecting
: (SELECT_TYPE
*)0),
4371 (SELECT_TYPE
*)0, &timeout
);
4376 /* Make C-g and alarm signals set flags again */
4377 clear_waiting_for_input ();
4379 /* If we woke up due to SIGWINCH, actually change size now. */
4380 do_pending_window_change (0);
4382 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4383 /* We wanted the full specified time, so return now. */
4387 if (xerrno
== EINTR
)
4390 /* Ultrix select seems to return ENOMEM when it is
4391 interrupted. Treat it just like EINTR. Bleah. Note
4392 that we want to test for the "ultrix" CPP symbol, not
4393 "__ultrix__"; the latter is only defined under GCC, but
4394 not by DEC's bundled CC. -JimB */
4395 else if (xerrno
== ENOMEM
)
4399 /* This happens for no known reason on ALLIANT.
4400 I am guessing that this is the right response. -- RMS. */
4401 else if (xerrno
== EFAULT
)
4404 else if (xerrno
== EBADF
)
4407 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4408 the child's closure of the pts gives the parent a SIGHUP, and
4409 the ptc file descriptor is automatically closed,
4410 yielding EBADF here or at select() call above.
4411 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4412 in m/ibmrt-aix.h), and here we just ignore the select error.
4413 Cleanup occurs c/o status_notify after SIGCLD. */
4414 no_avail
= 1; /* Cannot depend on values returned */
4420 error ("select error: %s", emacs_strerror (xerrno
));
4425 FD_ZERO (&Available
);
4426 IF_NON_BLOCKING_CONNECT (check_connect
= 0);
4429 #if defined(sun) && !defined(USG5_4)
4430 if (nfds
> 0 && keyboard_bit_set (&Available
)
4432 /* System sometimes fails to deliver SIGIO.
4434 David J. Mackenzie says that Emacs doesn't compile under
4435 Solaris if this code is enabled, thus the USG5_4 in the CPP
4436 conditional. "I haven't noticed any ill effects so far.
4437 If you find a Solaris expert somewhere, they might know
4439 kill (getpid (), SIGIO
);
4442 #if 0 /* When polling is used, interrupt_input is 0,
4443 so get_input_pending should read the input.
4444 So this should not be needed. */
4445 /* If we are using polling for input,
4446 and we see input available, make it get read now.
4447 Otherwise it might not actually get read for a second.
4448 And on hpux, since we turn off polling in wait_reading_process_output,
4449 it might never get read at all if we don't spend much time
4450 outside of wait_reading_process_output. */
4451 if (read_kbd
&& interrupt_input
4452 && keyboard_bit_set (&Available
)
4453 && input_polling_used ())
4454 kill (getpid (), SIGALRM
);
4457 /* Check for keyboard input */
4458 /* If there is any, return immediately
4459 to give it higher priority than subprocesses */
4463 int old_timers_run
= timers_run
;
4464 struct buffer
*old_buffer
= current_buffer
;
4467 if (detect_input_pending_run_timers (do_display
))
4469 swallow_events (do_display
);
4470 if (detect_input_pending_run_timers (do_display
))
4474 /* If a timer has run, this might have changed buffers
4475 an alike. Make read_key_sequence aware of that. */
4476 if (timers_run
!= old_timers_run
4477 && waiting_for_user_input_p
== -1
4478 && old_buffer
!= current_buffer
)
4479 record_asynch_buffer_change ();
4485 /* If there is unread keyboard input, also return. */
4487 && requeued_events_pending_p ())
4490 /* If we are not checking for keyboard input now,
4491 do process events (but don't run any timers).
4492 This is so that X events will be processed.
4493 Otherwise they may have to wait until polling takes place.
4494 That would causes delays in pasting selections, for example.
4496 (We used to do this only if wait_for_cell.) */
4497 if (read_kbd
== 0 && detect_input_pending ())
4499 swallow_events (do_display
);
4500 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4501 if (detect_input_pending ())
4506 /* Exit now if the cell we're waiting for became non-nil. */
4507 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4511 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4512 go read it. This can happen with X on BSD after logging out.
4513 In that case, there really is no input and no SIGIO,
4514 but select says there is input. */
4516 if (read_kbd
&& interrupt_input
4517 && keyboard_bit_set (&Available
) && ! noninteractive
)
4518 kill (getpid (), SIGIO
);
4522 got_some_input
|= nfds
> 0;
4524 /* If checking input just got us a size-change event from X,
4525 obey it now if we should. */
4526 if (read_kbd
|| ! NILP (wait_for_cell
))
4527 do_pending_window_change (0);
4529 /* Check for data from a process. */
4530 if (no_avail
|| nfds
== 0)
4533 /* Really FIRST_PROC_DESC should be 0 on Unix,
4534 but this is safer in the short run. */
4535 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4537 if (FD_ISSET (channel
, &Available
)
4538 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
4542 /* If waiting for this channel, arrange to return as
4543 soon as no more input to be processed. No more
4545 if (wait_channel
== channel
)
4551 proc
= chan_process
[channel
];
4555 /* If this is a server stream socket, accept connection. */
4556 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4558 server_accept_connection (proc
, channel
);
4562 /* Read data from the process, starting with our
4563 buffered-ahead character if we have one. */
4565 nread
= read_process_output (proc
, channel
);
4568 /* Since read_process_output can run a filter,
4569 which can call accept-process-output,
4570 don't try to read from any other processes
4571 before doing the select again. */
4572 FD_ZERO (&Available
);
4575 redisplay_preserve_echo_area (12);
4578 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4581 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4582 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4584 else if (nread
== -1 && errno
== EAGAIN
)
4588 else if (nread
== -1 && errno
== EAGAIN
)
4590 /* Note that we cannot distinguish between no input
4591 available now and a closed pipe.
4592 With luck, a closed pipe will be accompanied by
4593 subprocess termination and SIGCHLD. */
4594 else if (nread
== 0 && !NETCONN_P (proc
))
4596 #endif /* O_NDELAY */
4597 #endif /* O_NONBLOCK */
4599 /* On some OSs with ptys, when the process on one end of
4600 a pty exits, the other end gets an error reading with
4601 errno = EIO instead of getting an EOF (0 bytes read).
4602 Therefore, if we get an error reading and errno =
4603 EIO, just continue, because the child process has
4604 exited and should clean itself up soon (e.g. when we
4607 However, it has been known to happen that the SIGCHLD
4608 got lost. So raise the signl again just in case.
4610 else if (nread
== -1 && errno
== EIO
)
4611 kill (getpid (), SIGCHLD
);
4612 #endif /* HAVE_PTYS */
4613 /* If we can detect process termination, don't consider the process
4614 gone just because its pipe is closed. */
4616 else if (nread
== 0 && !NETCONN_P (proc
))
4621 /* Preserve status of processes already terminated. */
4622 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
4623 deactivate_process (proc
);
4624 if (!NILP (XPROCESS (proc
)->raw_status_low
))
4625 update_status (XPROCESS (proc
));
4626 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4627 XPROCESS (proc
)->status
4628 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
4631 #ifdef NON_BLOCKING_CONNECT
4632 if (check_connect
&& FD_ISSET (channel
, &Connecting
)
4633 && FD_ISSET (channel
, &connect_wait_mask
))
4635 struct Lisp_Process
*p
;
4637 FD_CLR (channel
, &connect_wait_mask
);
4638 if (--num_pending_connects
< 0)
4641 proc
= chan_process
[channel
];
4645 p
= XPROCESS (proc
);
4648 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4649 So only use it on systems where it is known to work. */
4651 int xlen
= sizeof(xerrno
);
4652 if (getsockopt(channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4657 struct sockaddr pname
;
4658 int pnamelen
= sizeof(pname
);
4660 /* If connection failed, getpeername will fail. */
4662 if (getpeername(channel
, &pname
, &pnamelen
) < 0)
4664 /* Obtain connect failure code through error slippage. */
4667 if (errno
== ENOTCONN
&& read(channel
, &dummy
, 1) < 0)
4674 XSETINT (p
->tick
, ++process_tick
);
4675 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
4676 deactivate_process (proc
);
4681 /* Execute the sentinel here. If we had relied on
4682 status_notify to do it later, it will read input
4683 from the process before calling the sentinel. */
4684 exec_sentinel (proc
, build_string ("open\n"));
4685 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4687 FD_SET (XINT (p
->infd
), &input_wait_mask
);
4688 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
4692 #endif /* NON_BLOCKING_CONNECT */
4693 } /* end for each file descriptor */
4694 } /* end while exit conditions not met */
4696 waiting_for_user_input_p
= saved_waiting_for_user_input_p
;
4698 /* If calling from keyboard input, do not quit
4699 since we want to return C-g as an input character.
4700 Otherwise, do pending quit if requested. */
4703 /* Prevent input_pending from remaining set if we quit. */
4704 clear_input_pending ();
4707 #ifdef POLL_INTERRUPTED_SYS_CALL
4708 /* AlainF 5-Jul-1996
4709 HP-UX 10.10 seems to have problems with signals coming in
4710 Causes "poll: interrupted system call" messages when Emacs is run
4712 Turn periodic alarms back on */
4714 #endif /* POLL_INTERRUPTED_SYS_CALL */
4716 return got_some_input
;
4719 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
4722 read_process_output_call (fun_and_args
)
4723 Lisp_Object fun_and_args
;
4725 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
4729 read_process_output_error_handler (error
)
4732 cmd_error_internal (error
, "error in process filter: ");
4734 update_echo_area ();
4735 Fsleep_for (make_number (2), Qnil
);
4739 /* Read pending output from the process channel,
4740 starting with our buffered-ahead character if we have one.
4741 Yield number of decoded characters read.
4743 This function reads at most 4096 characters.
4744 If you want to read all available subprocess output,
4745 you must call it repeatedly until it returns zero.
4747 The characters read are decoded according to PROC's coding-system
4751 read_process_output (proc
, channel
)
4753 register int channel
;
4755 register int nbytes
;
4757 register Lisp_Object outstream
;
4758 register struct buffer
*old
= current_buffer
;
4759 register struct Lisp_Process
*p
= XPROCESS (proc
);
4760 register int opoint
;
4761 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
4762 int carryover
= XINT (p
->decoding_carryover
);
4766 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
4768 vs
= get_vms_process_pointer (p
->pid
);
4772 return (0); /* Really weird if it does this */
4773 if (!(vs
->iosb
[0] & 1))
4774 return -1; /* I/O error */
4777 error ("Could not get VMS process pointer");
4778 chars
= vs
->inputBuffer
;
4779 nbytes
= clean_vms_buffer (chars
, vs
->iosb
[1]);
4782 start_vms_process_read (vs
); /* Crank up the next read on the process */
4783 return 1; /* Nothing worth printing, say we got 1 */
4787 /* The data carried over in the previous decoding (which are at
4788 the tail of decoding buffer) should be prepended to the new
4789 data read to decode all together. */
4790 chars
= (char *) alloca (nbytes
+ carryover
);
4791 bcopy (SDATA (p
->decoding_buf
), buf
, carryover
);
4792 bcopy (vs
->inputBuffer
, chars
+ carryover
, nbytes
);
4796 chars
= (char *) alloca (carryover
+ readmax
);
4798 /* See the comment above. */
4799 bcopy (SDATA (p
->decoding_buf
), chars
, carryover
);
4801 #ifdef DATAGRAM_SOCKETS
4802 /* We have a working select, so proc_buffered_char is always -1. */
4803 if (DATAGRAM_CHAN_P (channel
))
4805 int len
= datagram_address
[channel
].len
;
4806 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
4807 0, datagram_address
[channel
].sa
, &len
);
4811 if (proc_buffered_char
[channel
] < 0)
4813 nbytes
= emacs_read (channel
, chars
+ carryover
, readmax
);
4814 #ifdef ADAPTIVE_READ_BUFFERING
4815 if (nbytes
> 0 && !NILP (p
->adaptive_read_buffering
))
4817 int delay
= XINT (p
->read_output_delay
);
4820 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
4823 process_output_delay_count
++;
4824 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
4827 else if (delay
> 0 && (nbytes
== readmax
))
4829 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
4831 process_output_delay_count
--;
4833 XSETINT (p
->read_output_delay
, delay
);
4836 p
->read_output_skip
= Qt
;
4837 process_output_skip
= 1;
4844 chars
[carryover
] = proc_buffered_char
[channel
];
4845 proc_buffered_char
[channel
] = -1;
4846 nbytes
= emacs_read (channel
, chars
+ carryover
+ 1, readmax
- 1);
4850 nbytes
= nbytes
+ 1;
4852 #endif /* not VMS */
4854 XSETINT (p
->decoding_carryover
, 0);
4856 /* At this point, NBYTES holds number of bytes just received
4857 (including the one in proc_buffered_char[channel]). */
4860 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
4862 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
4865 /* Now set NBYTES how many bytes we must decode. */
4866 nbytes
+= carryover
;
4868 /* Read and dispose of the process output. */
4869 outstream
= p
->filter
;
4870 if (!NILP (outstream
))
4872 /* We inhibit quit here instead of just catching it so that
4873 hitting ^G when a filter happens to be running won't screw
4875 int count
= SPECPDL_INDEX ();
4876 Lisp_Object odeactivate
;
4877 Lisp_Object obuffer
, okeymap
;
4879 int outer_running_asynch_code
= running_asynch_code
;
4880 int waiting
= waiting_for_user_input_p
;
4882 /* No need to gcpro these, because all we do with them later
4883 is test them for EQness, and none of them should be a string. */
4884 odeactivate
= Vdeactivate_mark
;
4885 XSETBUFFER (obuffer
, current_buffer
);
4886 okeymap
= current_buffer
->keymap
;
4888 specbind (Qinhibit_quit
, Qt
);
4889 specbind (Qlast_nonmenu_event
, Qt
);
4891 /* In case we get recursively called,
4892 and we already saved the match data nonrecursively,
4893 save the same match data in safely recursive fashion. */
4894 if (outer_running_asynch_code
)
4897 /* Don't clobber the CURRENT match data, either! */
4898 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
4899 restore_search_regs ();
4900 record_unwind_save_match_data ();
4901 Fset_match_data (tem
, Qt
);
4904 /* For speed, if a search happens within this code,
4905 save the match data in a special nonrecursive fashion. */
4906 running_asynch_code
= 1;
4908 text
= decode_coding_string (make_unibyte_string (chars
, nbytes
),
4910 Vlast_coding_system_used
= coding
->symbol
;
4911 /* A new coding system might be found. */
4912 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
4914 p
->decode_coding_system
= coding
->symbol
;
4916 /* Don't call setup_coding_system for
4917 proc_decode_coding_system[channel] here. It is done in
4918 detect_coding called via decode_coding above. */
4920 /* If a coding system for encoding is not yet decided, we set
4921 it as the same as coding-system for decoding.
4923 But, before doing that we must check if
4924 proc_encode_coding_system[p->outfd] surely points to a
4925 valid memory because p->outfd will be changed once EOF is
4926 sent to the process. */
4927 if (NILP (p
->encode_coding_system
)
4928 && proc_encode_coding_system
[XINT (p
->outfd
)])
4930 p
->encode_coding_system
= coding
->symbol
;
4931 setup_coding_system (coding
->symbol
,
4932 proc_encode_coding_system
[XINT (p
->outfd
)]);
4936 carryover
= nbytes
- coding
->consumed
;
4937 if (SCHARS (p
->decoding_buf
) < carryover
)
4938 p
->decoding_buf
= make_uninit_string (carryover
);
4939 bcopy (chars
+ coding
->consumed
, SDATA (p
->decoding_buf
),
4941 XSETINT (p
->decoding_carryover
, carryover
);
4942 /* Adjust the multibyteness of TEXT to that of the filter. */
4943 if (NILP (p
->filter_multibyte
) != ! STRING_MULTIBYTE (text
))
4944 text
= (STRING_MULTIBYTE (text
)
4945 ? Fstring_as_unibyte (text
)
4946 : Fstring_to_multibyte (text
));
4947 if (SBYTES (text
) > 0)
4948 internal_condition_case_1 (read_process_output_call
,
4950 Fcons (proc
, Fcons (text
, Qnil
))),
4951 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
4952 read_process_output_error_handler
);
4954 /* If we saved the match data nonrecursively, restore it now. */
4955 restore_search_regs ();
4956 running_asynch_code
= outer_running_asynch_code
;
4958 /* Handling the process output should not deactivate the mark. */
4959 Vdeactivate_mark
= odeactivate
;
4961 /* Restore waiting_for_user_input_p as it was
4962 when we were called, in case the filter clobbered it. */
4963 waiting_for_user_input_p
= waiting
;
4965 #if 0 /* Call record_asynch_buffer_change unconditionally,
4966 because we might have changed minor modes or other things
4967 that affect key bindings. */
4968 if (! EQ (Fcurrent_buffer (), obuffer
)
4969 || ! EQ (current_buffer
->keymap
, okeymap
))
4971 /* But do it only if the caller is actually going to read events.
4972 Otherwise there's no need to make him wake up, and it could
4973 cause trouble (for example it would make Fsit_for return). */
4974 if (waiting_for_user_input_p
== -1)
4975 record_asynch_buffer_change ();
4978 start_vms_process_read (vs
);
4980 unbind_to (count
, Qnil
);
4984 /* If no filter, write into buffer if it isn't dead. */
4985 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
4987 Lisp_Object old_read_only
;
4988 int old_begv
, old_zv
;
4989 int old_begv_byte
, old_zv_byte
;
4990 Lisp_Object odeactivate
;
4991 int before
, before_byte
;
4996 odeactivate
= Vdeactivate_mark
;
4998 Fset_buffer (p
->buffer
);
5000 opoint_byte
= PT_BYTE
;
5001 old_read_only
= current_buffer
->read_only
;
5004 old_begv_byte
= BEGV_BYTE
;
5005 old_zv_byte
= ZV_BYTE
;
5007 current_buffer
->read_only
= Qnil
;
5009 /* Insert new output into buffer
5010 at the current end-of-output marker,
5011 thus preserving logical ordering of input and output. */
5012 if (XMARKER (p
->mark
)->buffer
)
5013 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
5014 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
5017 SET_PT_BOTH (ZV
, ZV_BYTE
);
5019 before_byte
= PT_BYTE
;
5021 /* If the output marker is outside of the visible region, save
5022 the restriction and widen. */
5023 if (! (BEGV
<= PT
&& PT
<= ZV
))
5026 text
= decode_coding_string (make_unibyte_string (chars
, nbytes
),
5028 Vlast_coding_system_used
= coding
->symbol
;
5029 /* A new coding system might be found. See the comment in the
5030 similar code in the previous `if' block. */
5031 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
5033 p
->decode_coding_system
= coding
->symbol
;
5034 if (NILP (p
->encode_coding_system
)
5035 && proc_encode_coding_system
[XINT (p
->outfd
)])
5037 p
->encode_coding_system
= coding
->symbol
;
5038 setup_coding_system (coding
->symbol
,
5039 proc_encode_coding_system
[XINT (p
->outfd
)]);
5042 carryover
= nbytes
- coding
->consumed
;
5043 if (SCHARS (p
->decoding_buf
) < carryover
)
5044 p
->decoding_buf
= make_uninit_string (carryover
);
5045 bcopy (chars
+ coding
->consumed
, SDATA (p
->decoding_buf
),
5047 XSETINT (p
->decoding_carryover
, carryover
);
5048 /* Adjust the multibyteness of TEXT to that of the buffer. */
5049 if (NILP (current_buffer
->enable_multibyte_characters
)
5050 != ! STRING_MULTIBYTE (text
))
5051 text
= (STRING_MULTIBYTE (text
)
5052 ? Fstring_as_unibyte (text
)
5053 : Fstring_to_multibyte (text
));
5054 /* Insert before markers in case we are inserting where
5055 the buffer's mark is, and the user's next command is Meta-y. */
5056 insert_from_string_before_markers (text
, 0, 0,
5057 SCHARS (text
), SBYTES (text
), 0);
5059 /* Make sure the process marker's position is valid when the
5060 process buffer is changed in the signal_after_change above.
5061 W3 is known to do that. */
5062 if (BUFFERP (p
->buffer
)
5063 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5064 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5066 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5068 update_mode_lines
++;
5070 /* Make sure opoint and the old restrictions
5071 float ahead of any new text just as point would. */
5072 if (opoint
>= before
)
5074 opoint
+= PT
- before
;
5075 opoint_byte
+= PT_BYTE
- before_byte
;
5077 if (old_begv
> before
)
5079 old_begv
+= PT
- before
;
5080 old_begv_byte
+= PT_BYTE
- before_byte
;
5082 if (old_zv
>= before
)
5084 old_zv
+= PT
- before
;
5085 old_zv_byte
+= PT_BYTE
- before_byte
;
5088 /* If the restriction isn't what it should be, set it. */
5089 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5090 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5092 /* Handling the process output should not deactivate the mark. */
5093 Vdeactivate_mark
= odeactivate
;
5095 current_buffer
->read_only
= old_read_only
;
5096 SET_PT_BOTH (opoint
, opoint_byte
);
5097 set_buffer_internal (old
);
5100 start_vms_process_read (vs
);
5105 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
5107 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
5108 This is intended for use by asynchronous process output filters and sentinels. */)
5111 return (waiting_for_user_input_p
? Qt
: Qnil
);
5114 /* Sending data to subprocess */
5116 jmp_buf send_process_frame
;
5117 Lisp_Object process_sent_to
;
5120 send_process_trap ()
5122 SIGNAL_THREAD_CHECK (SIGPIPE
);
5127 sigunblock (sigmask (SIGPIPE
));
5128 longjmp (send_process_frame
, 1);
5131 /* Send some data to process PROC.
5132 BUF is the beginning of the data; LEN is the number of characters.
5133 OBJECT is the Lisp object that the data comes from. If OBJECT is
5134 nil or t, it means that the data comes from C string.
5136 If OBJECT is not nil, the data is encoded by PROC's coding-system
5137 for encoding before it is sent.
5139 This function can evaluate Lisp code and can garbage collect. */
5142 send_process (proc
, buf
, len
, object
)
5143 volatile Lisp_Object proc
;
5144 unsigned char *volatile buf
;
5146 volatile Lisp_Object object
;
5148 /* Use volatile to protect variables from being clobbered by longjmp. */
5149 struct Lisp_Process
*p
= XPROCESS (proc
);
5151 struct coding_system
*coding
;
5152 struct gcpro gcpro1
;
5153 SIGTYPE (*volatile old_sigpipe
) ();
5158 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
5161 if (! NILP (p
->raw_status_low
))
5163 if (! EQ (p
->status
, Qrun
))
5164 error ("Process %s not running", SDATA (p
->name
));
5165 if (XINT (p
->outfd
) < 0)
5166 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5168 coding
= proc_encode_coding_system
[XINT (p
->outfd
)];
5169 Vlast_coding_system_used
= coding
->symbol
;
5171 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5172 || (BUFFERP (object
)
5173 && !NILP (XBUFFER (object
)->enable_multibyte_characters
))
5176 if (!EQ (coding
->symbol
, p
->encode_coding_system
))
5177 /* The coding system for encoding was changed to raw-text
5178 because we sent a unibyte text previously. Now we are
5179 sending a multibyte text, thus we must encode it by the
5180 original coding system specified for the current process. */
5181 setup_coding_system (p
->encode_coding_system
, coding
);
5182 /* src_multibyte should be set to 1 _after_ a call to
5183 setup_coding_system, since it resets src_multibyte to
5185 coding
->src_multibyte
= 1;
5189 /* For sending a unibyte text, character code conversion should
5190 not take place but EOL conversion should. So, setup raw-text
5191 or one of the subsidiary if we have not yet done it. */
5192 if (coding
->type
!= coding_type_raw_text
)
5194 if (CODING_REQUIRE_FLUSHING (coding
))
5196 /* But, before changing the coding, we must flush out data. */
5197 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5198 send_process (proc
, "", 0, Qt
);
5200 coding
->src_multibyte
= 0;
5201 setup_raw_text_coding_system (coding
);
5204 coding
->dst_multibyte
= 0;
5206 if (CODING_REQUIRE_ENCODING (coding
))
5208 int require
= encoding_buffer_size (coding
, len
);
5209 int from_byte
= -1, from
= -1, to
= -1;
5211 if (BUFFERP (object
))
5213 from_byte
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
5214 from
= buf_bytepos_to_charpos (XBUFFER (object
), from_byte
);
5215 to
= buf_bytepos_to_charpos (XBUFFER (object
), from_byte
+ len
);
5217 else if (STRINGP (object
))
5219 from_byte
= buf
- SDATA (object
);
5220 from
= string_byte_to_char (object
, from_byte
);
5221 to
= string_byte_to_char (object
, from_byte
+ len
);
5224 if (coding
->composing
!= COMPOSITION_DISABLED
)
5227 coding_save_composition (coding
, from
, to
, object
);
5229 coding
->composing
= COMPOSITION_DISABLED
;
5232 if (SBYTES (p
->encoding_buf
) < require
)
5233 p
->encoding_buf
= make_uninit_string (require
);
5236 buf
= (BUFFERP (object
)
5237 ? BUF_BYTE_ADDRESS (XBUFFER (object
), from_byte
)
5238 : SDATA (object
) + from_byte
);
5240 object
= p
->encoding_buf
;
5241 encode_coding (coding
, (char *) buf
, SDATA (object
),
5242 len
, SBYTES (object
));
5243 coding_free_composition_data (coding
);
5244 len
= coding
->produced
;
5245 buf
= SDATA (object
);
5249 vs
= get_vms_process_pointer (p
->pid
);
5251 error ("Could not find this process: %x", p
->pid
);
5252 else if (write_to_vms_process (vs
, buf
, len
))
5256 if (pty_max_bytes
== 0)
5258 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5259 pty_max_bytes
= fpathconf (XFASTINT (p
->outfd
), _PC_MAX_CANON
);
5260 if (pty_max_bytes
< 0)
5261 pty_max_bytes
= 250;
5263 pty_max_bytes
= 250;
5265 /* Deduct one, to leave space for the eof. */
5269 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
5270 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
5271 when returning with longjmp despite being declared volatile. */
5272 if (!setjmp (send_process_frame
))
5274 process_sent_to
= proc
;
5279 /* Decide how much data we can send in one batch.
5280 Long lines need to be split into multiple batches. */
5281 if (!NILP (p
->pty_flag
))
5283 /* Starting this at zero is always correct when not the first
5284 iteration because the previous iteration ended by sending C-d.
5285 It may not be correct for the first iteration
5286 if a partial line was sent in a separate send_process call.
5287 If that proves worth handling, we need to save linepos
5288 in the process object. */
5290 unsigned char *ptr
= (unsigned char *) buf
;
5291 unsigned char *end
= (unsigned char *) buf
+ len
;
5293 /* Scan through this text for a line that is too long. */
5294 while (ptr
!= end
&& linepos
< pty_max_bytes
)
5302 /* If we found one, break the line there
5303 and put in a C-d to force the buffer through. */
5307 /* Send this batch, using one or more write calls. */
5310 int outfd
= XINT (p
->outfd
);
5311 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
5312 #ifdef DATAGRAM_SOCKETS
5313 if (DATAGRAM_CHAN_P (outfd
))
5315 rv
= sendto (outfd
, (char *) buf
, this,
5316 0, datagram_address
[outfd
].sa
,
5317 datagram_address
[outfd
].len
);
5318 if (rv
< 0 && errno
== EMSGSIZE
)
5320 signal (SIGPIPE
, old_sigpipe
);
5321 report_file_error ("sending datagram",
5322 Fcons (proc
, Qnil
));
5328 rv
= emacs_write (outfd
, (char *) buf
, this);
5329 #ifdef ADAPTIVE_READ_BUFFERING
5330 if (XINT (p
->read_output_delay
) > 0
5331 && EQ (p
->adaptive_read_buffering
, Qt
))
5333 XSETFASTINT (p
->read_output_delay
, 0);
5334 process_output_delay_count
--;
5335 p
->read_output_skip
= Qnil
;
5339 signal (SIGPIPE
, old_sigpipe
);
5345 || errno
== EWOULDBLOCK
5351 /* Buffer is full. Wait, accepting input;
5352 that may allow the program
5353 to finish doing output and read more. */
5357 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5358 /* A gross hack to work around a bug in FreeBSD.
5359 In the following sequence, read(2) returns
5363 write(2) 954 bytes, get EAGAIN
5364 read(2) 1024 bytes in process_read_output
5365 read(2) 11 bytes in process_read_output
5367 That is, read(2) returns more bytes than have
5368 ever been written successfully. The 1033 bytes
5369 read are the 1022 bytes written successfully
5370 after processing (for example with CRs added if
5371 the terminal is set up that way which it is
5372 here). The same bytes will be seen again in a
5373 later read(2), without the CRs. */
5375 if (errno
== EAGAIN
)
5378 ioctl (XINT (p
->outfd
), TIOCFLUSH
, &flags
);
5380 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5382 /* Running filters might relocate buffers or strings.
5383 Arrange to relocate BUF. */
5384 if (BUFFERP (object
))
5385 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
5386 else if (STRINGP (object
))
5387 offset
= buf
- SDATA (object
);
5389 #ifdef EMACS_HAS_USECS
5390 wait_reading_process_output (0, 20000, 0, 0, Qnil
, NULL
, 0);
5392 wait_reading_process_output (1, 0, 0, 0, Qnil
, NULL
, 0);
5395 if (BUFFERP (object
))
5396 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
5397 else if (STRINGP (object
))
5398 buf
= offset
+ SDATA (object
);
5403 /* This is a real error. */
5404 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5411 /* If we sent just part of the string, put in an EOF
5412 to force it through, before we send the rest. */
5414 Fprocess_send_eof (proc
);
5417 #endif /* not VMS */
5420 signal (SIGPIPE
, old_sigpipe
);
5422 proc
= process_sent_to
;
5423 p
= XPROCESS (proc
);
5425 p
->raw_status_low
= Qnil
;
5426 p
->raw_status_high
= Qnil
;
5427 p
->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5428 XSETINT (p
->tick
, ++process_tick
);
5429 deactivate_process (proc
);
5431 error ("Error writing to process %s; closed it", SDATA (p
->name
));
5433 error ("SIGPIPE raised on process %s; closed it", SDATA (p
->name
));
5440 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5442 doc
: /* Send current contents of region as input to PROCESS.
5443 PROCESS may be a process, a buffer, the name of a process or buffer, or
5444 nil, indicating the current buffer's process.
5445 Called from program, takes three arguments, PROCESS, START and END.
5446 If the region is more than 500 characters long,
5447 it is sent in several bunches. This may happen even for shorter regions.
5448 Output from processes can arrive in between bunches. */)
5449 (process
, start
, end
)
5450 Lisp_Object process
, start
, end
;
5455 proc
= get_process (process
);
5456 validate_region (&start
, &end
);
5458 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5459 move_gap (XINT (start
));
5461 start1
= CHAR_TO_BYTE (XINT (start
));
5462 end1
= CHAR_TO_BYTE (XINT (end
));
5463 send_process (proc
, BYTE_POS_ADDR (start1
), end1
- start1
,
5464 Fcurrent_buffer ());
5469 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5471 doc
: /* Send PROCESS the contents of STRING as input.
5472 PROCESS may be a process, a buffer, the name of a process or buffer, or
5473 nil, indicating the current buffer's process.
5474 If STRING is more than 500 characters long,
5475 it is sent in several bunches. This may happen even for shorter strings.
5476 Output from processes can arrive in between bunches. */)
5478 Lisp_Object process
, string
;
5481 CHECK_STRING (string
);
5482 proc
= get_process (process
);
5483 send_process (proc
, SDATA (string
),
5484 SBYTES (string
), string
);
5488 /* Return the foreground process group for the tty/pty that
5489 the process P uses. */
5491 emacs_get_tty_pgrp (p
)
5492 struct Lisp_Process
*p
;
5497 if (ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5500 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5501 master side. Try the slave side. */
5502 fd
= emacs_open (XSTRING (p
->tty_name
)->data
, O_RDONLY
, 0);
5506 ioctl (fd
, TIOCGPGRP
, &gid
);
5510 #endif /* defined (TIOCGPGRP ) */
5515 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5516 Sprocess_running_child_p
, 0, 1, 0,
5517 doc
: /* Return t if PROCESS has given the terminal to a child.
5518 If the operating system does not make it possible to find out,
5519 return t unconditionally. */)
5521 Lisp_Object process
;
5523 /* Initialize in case ioctl doesn't exist or gives an error,
5524 in a way that will cause returning t. */
5527 struct Lisp_Process
*p
;
5529 proc
= get_process (process
);
5530 p
= XPROCESS (proc
);
5532 if (!EQ (p
->childp
, Qt
))
5533 error ("Process %s is not a subprocess",
5535 if (XINT (p
->infd
) < 0)
5536 error ("Process %s is not active",
5539 gid
= emacs_get_tty_pgrp (p
);
5541 if (gid
== XFASTINT (p
->pid
))
5546 /* send a signal number SIGNO to PROCESS.
5547 If CURRENT_GROUP is t, that means send to the process group
5548 that currently owns the terminal being used to communicate with PROCESS.
5549 This is used for various commands in shell mode.
5550 If CURRENT_GROUP is lambda, that means send to the process group
5551 that currently owns the terminal, but only if it is NOT the shell itself.
5553 If NOMSG is zero, insert signal-announcements into process's buffers
5556 If we can, we try to signal PROCESS by sending control characters
5557 down the pty. This allows us to signal inferiors who have changed
5558 their uid, for which killpg would return an EPERM error. */
5561 process_send_signal (process
, signo
, current_group
, nomsg
)
5562 Lisp_Object process
;
5564 Lisp_Object current_group
;
5568 register struct Lisp_Process
*p
;
5572 proc
= get_process (process
);
5573 p
= XPROCESS (proc
);
5575 if (!EQ (p
->childp
, Qt
))
5576 error ("Process %s is not a subprocess",
5578 if (XINT (p
->infd
) < 0)
5579 error ("Process %s is not active",
5582 if (NILP (p
->pty_flag
))
5583 current_group
= Qnil
;
5585 /* If we are using pgrps, get a pgrp number and make it negative. */
5586 if (NILP (current_group
))
5587 /* Send the signal to the shell's process group. */
5588 gid
= XFASTINT (p
->pid
);
5591 #ifdef SIGNALS_VIA_CHARACTERS
5592 /* If possible, send signals to the entire pgrp
5593 by sending an input character to it. */
5595 /* TERMIOS is the latest and bestest, and seems most likely to
5596 work. If the system has it, use it. */
5599 cc_t
*sig_char
= NULL
;
5601 tcgetattr (XINT (p
->infd
), &t
);
5606 sig_char
= &t
.c_cc
[VINTR
];
5610 sig_char
= &t
.c_cc
[VQUIT
];
5614 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5615 sig_char
= &t
.c_cc
[VSWTCH
];
5617 sig_char
= &t
.c_cc
[VSUSP
];
5622 if (sig_char
&& *sig_char
!= CDISABLE
)
5624 send_process (proc
, sig_char
, 1, Qnil
);
5627 /* If we can't send the signal with a character,
5628 fall through and send it another way. */
5629 #else /* ! HAVE_TERMIOS */
5631 /* On Berkeley descendants, the following IOCTL's retrieve the
5632 current control characters. */
5633 #if defined (TIOCGLTC) && defined (TIOCGETC)
5641 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
5642 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
5645 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
5646 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
5650 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
5651 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
5653 #endif /* ! defined (SIGTSTP) */
5656 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
5658 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
5665 ioctl (XINT (p
->infd
), TCGETA
, &t
);
5666 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
5669 ioctl (XINT (p
->infd
), TCGETA
, &t
);
5670 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
5674 ioctl (XINT (p
->infd
), TCGETA
, &t
);
5675 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
5677 #endif /* ! defined (SIGTSTP) */
5679 #else /* ! defined (TCGETA) */
5680 Your configuration files are messed up
.
5681 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
5682 you'd better be using one of the alternatives above! */
5683 #endif /* ! defined (TCGETA) */
5684 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
5685 /* In this case, the code above should alway returns. */
5687 #endif /* ! defined HAVE_TERMIOS */
5689 /* The code above may fall through if it can't
5690 handle the signal. */
5691 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5694 /* Get the current pgrp using the tty itself, if we have that.
5695 Otherwise, use the pty to get the pgrp.
5696 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5697 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5698 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5699 His patch indicates that if TIOCGPGRP returns an error, then
5700 we should just assume that p->pid is also the process group id. */
5702 gid
= emacs_get_tty_pgrp (p
);
5705 /* If we can't get the information, assume
5706 the shell owns the tty. */
5707 gid
= XFASTINT (p
->pid
);
5709 /* It is not clear whether anything really can set GID to -1.
5710 Perhaps on some system one of those ioctls can or could do so.
5711 Or perhaps this is vestigial. */
5714 #else /* ! defined (TIOCGPGRP ) */
5715 /* Can't select pgrps on this system, so we know that
5716 the child itself heads the pgrp. */
5717 gid
= XFASTINT (p
->pid
);
5718 #endif /* ! defined (TIOCGPGRP ) */
5720 /* If current_group is lambda, and the shell owns the terminal,
5721 don't send any signal. */
5722 if (EQ (current_group
, Qlambda
) && gid
== XFASTINT (p
->pid
))
5730 p
->raw_status_low
= Qnil
;
5731 p
->raw_status_high
= Qnil
;
5733 XSETINT (p
->tick
, ++process_tick
);
5735 status_notify (NULL
);
5737 #endif /* ! defined (SIGCONT) */
5740 send_process (proc
, "\003", 1, Qnil
); /* ^C */
5745 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
5750 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
5753 flush_pending_output (XINT (p
->infd
));
5757 /* If we don't have process groups, send the signal to the immediate
5758 subprocess. That isn't really right, but it's better than any
5759 obvious alternative. */
5762 kill (XFASTINT (p
->pid
), signo
);
5766 /* gid may be a pid, or minus a pgrp's number */
5768 if (!NILP (current_group
))
5770 if (ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
) == -1)
5771 EMACS_KILLPG (gid
, signo
);
5775 gid
= - XFASTINT (p
->pid
);
5778 #else /* ! defined (TIOCSIGSEND) */
5779 EMACS_KILLPG (gid
, signo
);
5780 #endif /* ! defined (TIOCSIGSEND) */
5783 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
5784 doc
: /* Interrupt process PROCESS.
5785 PROCESS may be a process, a buffer, or the name of a process or buffer.
5786 No arg or nil means current buffer's process.
5787 Second arg CURRENT-GROUP non-nil means send signal to
5788 the current process-group of the process's controlling terminal
5789 rather than to the process's own process group.
5790 If the process is a shell, this means interrupt current subjob
5791 rather than the shell.
5793 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
5794 don't send the signal. */)
5795 (process
, current_group
)
5796 Lisp_Object process
, current_group
;
5798 process_send_signal (process
, SIGINT
, current_group
, 0);
5802 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
5803 doc
: /* Kill process PROCESS. May be process or name of one.
5804 See function `interrupt-process' for more details on usage. */)
5805 (process
, current_group
)
5806 Lisp_Object process
, current_group
;
5808 process_send_signal (process
, SIGKILL
, current_group
, 0);
5812 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
5813 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
5814 See function `interrupt-process' for more details on usage. */)
5815 (process
, current_group
)
5816 Lisp_Object process
, current_group
;
5818 process_send_signal (process
, SIGQUIT
, current_group
, 0);
5822 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
5823 doc
: /* Stop process PROCESS. May be process or name of one.
5824 See function `interrupt-process' for more details on usage.
5825 If PROCESS is a network process, inhibit handling of incoming traffic. */)
5826 (process
, current_group
)
5827 Lisp_Object process
, current_group
;
5830 if (PROCESSP (process
) && NETCONN_P (process
))
5832 struct Lisp_Process
*p
;
5834 p
= XPROCESS (process
);
5835 if (NILP (p
->command
)
5836 && XINT (p
->infd
) >= 0)
5838 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
5839 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
5846 error ("No SIGTSTP support");
5848 process_send_signal (process
, SIGTSTP
, current_group
, 0);
5853 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
5854 doc
: /* Continue process PROCESS. May be process or name of one.
5855 See function `interrupt-process' for more details on usage.
5856 If PROCESS is a network process, resume handling of incoming traffic. */)
5857 (process
, current_group
)
5858 Lisp_Object process
, current_group
;
5861 if (PROCESSP (process
) && NETCONN_P (process
))
5863 struct Lisp_Process
*p
;
5865 p
= XPROCESS (process
);
5866 if (EQ (p
->command
, Qt
)
5867 && XINT (p
->infd
) >= 0
5868 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
5870 FD_SET (XINT (p
->infd
), &input_wait_mask
);
5871 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
5878 process_send_signal (process
, SIGCONT
, current_group
, 0);
5880 error ("No SIGCONT support");
5885 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
5886 2, 2, "sProcess (name or number): \nnSignal code: ",
5887 doc
: /* Send PROCESS the signal with code SIGCODE.
5888 PROCESS may also be an integer specifying the process id of the
5889 process to signal; in this case, the process need not be a child of
5891 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
5893 Lisp_Object process
, sigcode
;
5897 if (INTEGERP (process
))
5903 if (STRINGP (process
))
5906 if (tem
= Fget_process (process
), NILP (tem
))
5908 pid
= Fstring_to_number (process
, make_number (10));
5909 if (XINT (pid
) != 0)
5915 process
= get_process (process
);
5920 CHECK_PROCESS (process
);
5921 pid
= XPROCESS (process
)->pid
;
5922 if (!INTEGERP (pid
) || XINT (pid
) <= 0)
5923 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
5927 #define handle_signal(NAME, VALUE) \
5928 else if (!strcmp (name, NAME)) \
5929 XSETINT (sigcode, VALUE)
5931 if (INTEGERP (sigcode
))
5935 unsigned char *name
;
5937 CHECK_SYMBOL (sigcode
);
5938 name
= SDATA (SYMBOL_NAME (sigcode
));
5943 handle_signal ("SIGHUP", SIGHUP
);
5946 handle_signal ("SIGINT", SIGINT
);
5949 handle_signal ("SIGQUIT", SIGQUIT
);
5952 handle_signal ("SIGILL", SIGILL
);
5955 handle_signal ("SIGABRT", SIGABRT
);
5958 handle_signal ("SIGEMT", SIGEMT
);
5961 handle_signal ("SIGKILL", SIGKILL
);
5964 handle_signal ("SIGFPE", SIGFPE
);
5967 handle_signal ("SIGBUS", SIGBUS
);
5970 handle_signal ("SIGSEGV", SIGSEGV
);
5973 handle_signal ("SIGSYS", SIGSYS
);
5976 handle_signal ("SIGPIPE", SIGPIPE
);
5979 handle_signal ("SIGALRM", SIGALRM
);
5982 handle_signal ("SIGTERM", SIGTERM
);
5985 handle_signal ("SIGURG", SIGURG
);
5988 handle_signal ("SIGSTOP", SIGSTOP
);
5991 handle_signal ("SIGTSTP", SIGTSTP
);
5994 handle_signal ("SIGCONT", SIGCONT
);
5997 handle_signal ("SIGCHLD", SIGCHLD
);
6000 handle_signal ("SIGTTIN", SIGTTIN
);
6003 handle_signal ("SIGTTOU", SIGTTOU
);
6006 handle_signal ("SIGIO", SIGIO
);
6009 handle_signal ("SIGXCPU", SIGXCPU
);
6012 handle_signal ("SIGXFSZ", SIGXFSZ
);
6015 handle_signal ("SIGVTALRM", SIGVTALRM
);
6018 handle_signal ("SIGPROF", SIGPROF
);
6021 handle_signal ("SIGWINCH", SIGWINCH
);
6024 handle_signal ("SIGINFO", SIGINFO
);
6027 handle_signal ("SIGUSR1", SIGUSR1
);
6030 handle_signal ("SIGUSR2", SIGUSR2
);
6033 error ("Undefined signal name %s", name
);
6036 #undef handle_signal
6038 return make_number (kill (XINT (pid
), XINT (sigcode
)));
6041 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6042 doc
: /* Make PROCESS see end-of-file in its input.
6043 EOF comes after any text already sent to it.
6044 PROCESS may be a process, a buffer, the name of a process or buffer, or
6045 nil, indicating the current buffer's process.
6046 If PROCESS is a network connection, or is a process communicating
6047 through a pipe (as opposed to a pty), then you cannot send any more
6048 text to PROCESS after you call this function. */)
6050 Lisp_Object process
;
6053 struct coding_system
*coding
;
6055 if (DATAGRAM_CONN_P (process
))
6058 proc
= get_process (process
);
6059 coding
= proc_encode_coding_system
[XINT (XPROCESS (proc
)->outfd
)];
6061 /* Make sure the process is really alive. */
6062 if (! NILP (XPROCESS (proc
)->raw_status_low
))
6063 update_status (XPROCESS (proc
));
6064 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6065 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6067 if (CODING_REQUIRE_FLUSHING (coding
))
6069 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6070 send_process (proc
, "", 0, Qnil
);
6074 send_process (proc
, "\032", 1, Qnil
); /* ^z */
6076 if (!NILP (XPROCESS (proc
)->pty_flag
))
6077 send_process (proc
, "\004", 1, Qnil
);
6080 int old_outfd
, new_outfd
;
6082 #ifdef HAVE_SHUTDOWN
6083 /* If this is a network connection, or socketpair is used
6084 for communication with the subprocess, call shutdown to cause EOF.
6085 (In some old system, shutdown to socketpair doesn't work.
6086 Then we just can't win.) */
6087 if (NILP (XPROCESS (proc
)->pid
)
6088 || XINT (XPROCESS (proc
)->outfd
) == XINT (XPROCESS (proc
)->infd
))
6089 shutdown (XINT (XPROCESS (proc
)->outfd
), 1);
6090 /* In case of socketpair, outfd == infd, so don't close it. */
6091 if (XINT (XPROCESS (proc
)->outfd
) != XINT (XPROCESS (proc
)->infd
))
6092 emacs_close (XINT (XPROCESS (proc
)->outfd
));
6093 #else /* not HAVE_SHUTDOWN */
6094 emacs_close (XINT (XPROCESS (proc
)->outfd
));
6095 #endif /* not HAVE_SHUTDOWN */
6096 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6097 old_outfd
= XINT (XPROCESS (proc
)->outfd
);
6099 if (!proc_encode_coding_system
[new_outfd
])
6100 proc_encode_coding_system
[new_outfd
]
6101 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6102 bcopy (proc_encode_coding_system
[old_outfd
],
6103 proc_encode_coding_system
[new_outfd
],
6104 sizeof (struct coding_system
));
6105 bzero (proc_encode_coding_system
[old_outfd
],
6106 sizeof (struct coding_system
));
6108 XSETINT (XPROCESS (proc
)->outfd
, new_outfd
);
6114 /* Kill all processes associated with `buffer'.
6115 If `buffer' is nil, kill all processes */
6118 kill_buffer_processes (buffer
)
6121 Lisp_Object tail
, proc
;
6123 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6125 proc
= XCDR (XCAR (tail
));
6126 if (GC_PROCESSP (proc
)
6127 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
6129 if (NETCONN_P (proc
))
6130 Fdelete_process (proc
);
6131 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
6132 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
6137 /* On receipt of a signal that a child status has changed, loop asking
6138 about children with changed statuses until the system says there
6141 All we do is change the status; we do not run sentinels or print
6142 notifications. That is saved for the next time keyboard input is
6143 done, in order to avoid timing errors.
6145 ** WARNING: this can be called during garbage collection.
6146 Therefore, it must not be fooled by the presence of mark bits in
6149 ** USG WARNING: Although it is not obvious from the documentation
6150 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6151 signal() before executing at least one wait(), otherwise the
6152 handler will be called again, resulting in an infinite loop. The
6153 relevant portion of the documentation reads "SIGCLD signals will be
6154 queued and the signal-catching function will be continually
6155 reentered until the queue is empty". Invoking signal() causes the
6156 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6159 ** Malloc WARNING: This should never call malloc either directly or
6160 indirectly; if it does, that is a bug */
6163 sigchld_handler (signo
)
6166 int old_errno
= errno
;
6168 register struct Lisp_Process
*p
;
6169 extern EMACS_TIME
*input_available_clear_time
;
6171 SIGNAL_THREAD_CHECK (signo
);
6175 sigheld
|= sigbit (SIGCHLD
);
6187 #endif /* no WUNTRACED */
6188 /* Keep trying to get a status until we get a definitive result. */
6192 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
6194 while (pid
< 0 && errno
== EINTR
);
6198 /* PID == 0 means no processes found, PID == -1 means a real
6199 failure. We have done all our job, so return. */
6201 /* USG systems forget handlers when they are used;
6202 must reestablish each time */
6203 #if defined (USG) && !defined (POSIX_SIGNALS)
6204 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
6207 sigheld
&= ~sigbit (SIGCHLD
);
6215 #endif /* no WNOHANG */
6217 /* Find the process that signaled us, and record its status. */
6220 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6222 proc
= XCDR (XCAR (tail
));
6223 p
= XPROCESS (proc
);
6224 if (GC_EQ (p
->childp
, Qt
) && XINT (p
->pid
) == pid
)
6229 /* Look for an asynchronous process whose pid hasn't been filled
6232 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
6234 proc
= XCDR (XCAR (tail
));
6235 p
= XPROCESS (proc
);
6236 if (GC_INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
6241 /* Change the status of the process that was found. */
6244 union { int i
; WAITTYPE wt
; } u
;
6245 int clear_desc_flag
= 0;
6247 XSETINT (p
->tick
, ++process_tick
);
6249 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
6250 XSETINT (p
->raw_status_high
, u
.i
>> 16);
6252 /* If process has terminated, stop waiting for its output. */
6253 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6254 && XINT (p
->infd
) >= 0)
6255 clear_desc_flag
= 1;
6257 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6258 if (clear_desc_flag
)
6260 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
6261 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
6264 /* Tell wait_reading_process_output that it needs to wake up and
6266 if (input_available_clear_time
)
6267 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6270 /* There was no asynchronous process found for that id. Check
6271 if we have a synchronous process. */
6274 synch_process_alive
= 0;
6276 /* Report the status of the synchronous process. */
6278 synch_process_retcode
= WRETCODE (w
);
6279 else if (WIFSIGNALED (w
))
6280 synch_process_termsig
= WTERMSIG (w
);
6282 /* Tell wait_reading_process_output that it needs to wake up and
6284 if (input_available_clear_time
)
6285 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6288 /* On some systems, we must return right away.
6289 If any more processes want to signal us, we will
6291 Otherwise (on systems that have WNOHANG), loop around
6292 to use up all the processes that have something to tell us. */
6293 #if (defined WINDOWSNT \
6294 || (defined USG && !defined GNU_LINUX \
6295 && !(defined HPUX && defined WNOHANG)))
6296 #if defined (USG) && ! defined (POSIX_SIGNALS)
6297 signal (signo
, sigchld_handler
);
6301 #endif /* USG, but not HPUX with WNOHANG */
6307 exec_sentinel_unwind (data
)
6310 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
6315 exec_sentinel_error_handler (error
)
6318 cmd_error_internal (error
, "error in process sentinel: ");
6320 update_echo_area ();
6321 Fsleep_for (make_number (2), Qnil
);
6326 exec_sentinel (proc
, reason
)
6327 Lisp_Object proc
, reason
;
6329 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
6330 register struct Lisp_Process
*p
= XPROCESS (proc
);
6331 int count
= SPECPDL_INDEX ();
6332 int outer_running_asynch_code
= running_asynch_code
;
6333 int waiting
= waiting_for_user_input_p
;
6335 /* No need to gcpro these, because all we do with them later
6336 is test them for EQness, and none of them should be a string. */
6337 odeactivate
= Vdeactivate_mark
;
6338 XSETBUFFER (obuffer
, current_buffer
);
6339 okeymap
= current_buffer
->keymap
;
6341 sentinel
= p
->sentinel
;
6342 if (NILP (sentinel
))
6345 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6346 assure that it gets restored no matter how the sentinel exits. */
6348 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6349 /* Inhibit quit so that random quits don't screw up a running filter. */
6350 specbind (Qinhibit_quit
, Qt
);
6351 specbind (Qlast_nonmenu_event
, Qt
);
6353 /* In case we get recursively called,
6354 and we already saved the match data nonrecursively,
6355 save the same match data in safely recursive fashion. */
6356 if (outer_running_asynch_code
)
6359 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6360 restore_search_regs ();
6361 record_unwind_save_match_data ();
6362 Fset_match_data (tem
, Qt
);
6365 /* For speed, if a search happens within this code,
6366 save the match data in a special nonrecursive fashion. */
6367 running_asynch_code
= 1;
6369 internal_condition_case_1 (read_process_output_call
,
6371 Fcons (proc
, Fcons (reason
, Qnil
))),
6372 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6373 exec_sentinel_error_handler
);
6375 /* If we saved the match data nonrecursively, restore it now. */
6376 restore_search_regs ();
6377 running_asynch_code
= outer_running_asynch_code
;
6379 Vdeactivate_mark
= odeactivate
;
6381 /* Restore waiting_for_user_input_p as it was
6382 when we were called, in case the filter clobbered it. */
6383 waiting_for_user_input_p
= waiting
;
6386 if (! EQ (Fcurrent_buffer (), obuffer
)
6387 || ! EQ (current_buffer
->keymap
, okeymap
))
6389 /* But do it only if the caller is actually going to read events.
6390 Otherwise there's no need to make him wake up, and it could
6391 cause trouble (for example it would make Fsit_for return). */
6392 if (waiting_for_user_input_p
== -1)
6393 record_asynch_buffer_change ();
6395 unbind_to (count
, Qnil
);
6398 /* Report all recent events of a change in process status
6399 (either run the sentinel or output a message).
6400 This is usually done while Emacs is waiting for keyboard input
6401 but can be done at other times. */
6404 status_notify (deleting_process
)
6405 struct Lisp_Process
*deleting_process
;
6407 register Lisp_Object proc
, buffer
;
6408 Lisp_Object tail
, msg
;
6409 struct gcpro gcpro1
, gcpro2
;
6413 /* We need to gcpro tail; if read_process_output calls a filter
6414 which deletes a process and removes the cons to which tail points
6415 from Vprocess_alist, and then causes a GC, tail is an unprotected
6419 /* Set this now, so that if new processes are created by sentinels
6420 that we run, we get called again to handle their status changes. */
6421 update_tick
= process_tick
;
6423 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
6426 register struct Lisp_Process
*p
;
6428 proc
= Fcdr (Fcar (tail
));
6429 p
= XPROCESS (proc
);
6431 if (XINT (p
->tick
) != XINT (p
->update_tick
))
6433 XSETINT (p
->update_tick
, XINT (p
->tick
));
6435 /* If process is still active, read any output that remains. */
6436 while (! EQ (p
->filter
, Qt
)
6437 && ! EQ (p
->status
, Qconnect
)
6438 && ! EQ (p
->status
, Qlisten
)
6439 && ! EQ (p
->command
, Qt
) /* Network process not stopped. */
6440 && XINT (p
->infd
) >= 0
6441 && p
!= deleting_process
6442 && read_process_output (proc
, XINT (p
->infd
)) > 0);
6446 /* Get the text to use for the message. */
6447 if (!NILP (p
->raw_status_low
))
6449 msg
= status_message (p
);
6451 /* If process is terminated, deactivate it or delete it. */
6453 if (CONSP (p
->status
))
6454 symbol
= XCAR (p
->status
);
6456 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6457 || EQ (symbol
, Qclosed
))
6459 if (delete_exited_processes
)
6460 remove_process (proc
);
6462 deactivate_process (proc
);
6465 /* The actions above may have further incremented p->tick.
6466 So set p->update_tick again
6467 so that an error in the sentinel will not cause
6468 this code to be run again. */
6469 XSETINT (p
->update_tick
, XINT (p
->tick
));
6470 /* Now output the message suitably. */
6471 if (!NILP (p
->sentinel
))
6472 exec_sentinel (proc
, msg
);
6473 /* Don't bother with a message in the buffer
6474 when a process becomes runnable. */
6475 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6477 Lisp_Object ro
, tem
;
6478 struct buffer
*old
= current_buffer
;
6479 int opoint
, opoint_byte
;
6480 int before
, before_byte
;
6482 ro
= XBUFFER (buffer
)->read_only
;
6484 /* Avoid error if buffer is deleted
6485 (probably that's why the process is dead, too) */
6486 if (NILP (XBUFFER (buffer
)->name
))
6488 Fset_buffer (buffer
);
6491 opoint_byte
= PT_BYTE
;
6492 /* Insert new output into buffer
6493 at the current end-of-output marker,
6494 thus preserving logical ordering of input and output. */
6495 if (XMARKER (p
->mark
)->buffer
)
6496 Fgoto_char (p
->mark
);
6498 SET_PT_BOTH (ZV
, ZV_BYTE
);
6501 before_byte
= PT_BYTE
;
6503 tem
= current_buffer
->read_only
;
6504 current_buffer
->read_only
= Qnil
;
6505 insert_string ("\nProcess ");
6506 Finsert (1, &p
->name
);
6507 insert_string (" ");
6509 current_buffer
->read_only
= tem
;
6510 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6512 if (opoint
>= before
)
6513 SET_PT_BOTH (opoint
+ (PT
- before
),
6514 opoint_byte
+ (PT_BYTE
- before_byte
));
6516 SET_PT_BOTH (opoint
, opoint_byte
);
6518 set_buffer_internal (old
);
6523 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6524 redisplay_preserve_echo_area (13);
6530 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6531 Sset_process_coding_system
, 1, 3, 0,
6532 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6533 DECODING will be used to decode subprocess output and ENCODING to
6534 encode subprocess input. */)
6535 (process
, decoding
, encoding
)
6536 register Lisp_Object process
, decoding
, encoding
;
6538 register struct Lisp_Process
*p
;
6540 CHECK_PROCESS (process
);
6541 p
= XPROCESS (process
);
6542 if (XINT (p
->infd
) < 0)
6543 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6544 if (XINT (p
->outfd
) < 0)
6545 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6546 Fcheck_coding_system (decoding
);
6547 Fcheck_coding_system (encoding
);
6549 p
->decode_coding_system
= decoding
;
6550 p
->encode_coding_system
= encoding
;
6551 setup_process_coding_systems (process
);
6556 DEFUN ("process-coding-system",
6557 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6558 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6560 register Lisp_Object process
;
6562 CHECK_PROCESS (process
);
6563 return Fcons (XPROCESS (process
)->decode_coding_system
,
6564 XPROCESS (process
)->encode_coding_system
);
6567 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6568 Sset_process_filter_multibyte
, 2, 2, 0,
6569 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6570 If FLAG is non-nil, the filter is given multibyte strings.
6571 If FLAG is nil, the filter is given unibyte strings. In this case,
6572 all character code conversion except for end-of-line conversion is
6575 Lisp_Object process
, flag
;
6577 register struct Lisp_Process
*p
;
6579 CHECK_PROCESS (process
);
6580 p
= XPROCESS (process
);
6581 p
->filter_multibyte
= flag
;
6582 setup_process_coding_systems (process
);
6587 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6588 Sprocess_filter_multibyte_p
, 1, 1, 0,
6589 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6591 Lisp_Object process
;
6593 register struct Lisp_Process
*p
;
6595 CHECK_PROCESS (process
);
6596 p
= XPROCESS (process
);
6598 return (NILP (p
->filter_multibyte
) ? Qnil
: Qt
);
6603 /* The first time this is called, assume keyboard input comes from DESC
6604 instead of from where we used to expect it.
6605 Subsequent calls mean assume input keyboard can come from DESC
6606 in addition to other places. */
6608 static int add_keyboard_wait_descriptor_called_flag
;
6611 add_keyboard_wait_descriptor (desc
)
6614 if (! add_keyboard_wait_descriptor_called_flag
)
6615 FD_CLR (0, &input_wait_mask
);
6616 add_keyboard_wait_descriptor_called_flag
= 1;
6617 FD_SET (desc
, &input_wait_mask
);
6618 FD_SET (desc
, &non_process_wait_mask
);
6619 if (desc
> max_keyboard_desc
)
6620 max_keyboard_desc
= desc
;
6623 /* From now on, do not expect DESC to give keyboard input. */
6626 delete_keyboard_wait_descriptor (desc
)
6630 int lim
= max_keyboard_desc
;
6632 FD_CLR (desc
, &input_wait_mask
);
6633 FD_CLR (desc
, &non_process_wait_mask
);
6635 if (desc
== max_keyboard_desc
)
6636 for (fd
= 0; fd
< lim
; fd
++)
6637 if (FD_ISSET (fd
, &input_wait_mask
)
6638 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6639 max_keyboard_desc
= fd
;
6642 /* Return nonzero if *MASK has a bit set
6643 that corresponds to one of the keyboard input descriptors. */
6646 keyboard_bit_set (mask
)
6651 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
6652 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6653 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6666 if (! noninteractive
|| initialized
)
6668 signal (SIGCHLD
, sigchld_handler
);
6671 FD_ZERO (&input_wait_mask
);
6672 FD_ZERO (&non_keyboard_wait_mask
);
6673 FD_ZERO (&non_process_wait_mask
);
6674 max_process_desc
= 0;
6676 #ifdef NON_BLOCKING_CONNECT
6677 FD_ZERO (&connect_wait_mask
);
6678 num_pending_connects
= 0;
6681 #ifdef ADAPTIVE_READ_BUFFERING
6682 process_output_delay_count
= 0;
6683 process_output_skip
= 0;
6686 FD_SET (0, &input_wait_mask
);
6688 Vprocess_alist
= Qnil
;
6689 for (i
= 0; i
< MAXDESC
; i
++)
6691 chan_process
[i
] = Qnil
;
6692 proc_buffered_char
[i
] = -1;
6694 bzero (proc_decode_coding_system
, sizeof proc_decode_coding_system
);
6695 bzero (proc_encode_coding_system
, sizeof proc_encode_coding_system
);
6696 #ifdef DATAGRAM_SOCKETS
6697 bzero (datagram_address
, sizeof datagram_address
);
6702 Lisp_Object subfeatures
= Qnil
;
6703 struct socket_options
*sopt
;
6705 #define ADD_SUBFEATURE(key, val) \
6706 subfeatures = Fcons (Fcons (key, Fcons (val, Qnil)), subfeatures)
6708 #ifdef NON_BLOCKING_CONNECT
6709 ADD_SUBFEATURE (QCnowait
, Qt
);
6711 #ifdef DATAGRAM_SOCKETS
6712 ADD_SUBFEATURE (QCtype
, Qdatagram
);
6714 #ifdef HAVE_LOCAL_SOCKETS
6715 ADD_SUBFEATURE (QCfamily
, Qlocal
);
6717 #ifdef HAVE_GETSOCKNAME
6718 ADD_SUBFEATURE (QCservice
, Qt
);
6720 #if !defined(TERM) && (defined(O_NONBLOCK) || defined(O_NDELAY))
6721 ADD_SUBFEATURE (QCserver
, Qt
);
6724 for (sopt
= socket_options
; sopt
->name
; sopt
++)
6725 subfeatures
= Fcons (intern (sopt
->name
), subfeatures
);
6727 Fprovide (intern ("make-network-process"), subfeatures
);
6729 #endif /* HAVE_SOCKETS */
6731 #if defined (DARWIN) || defined (MAC_OSX)
6732 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
6733 processes. As such, we only change the default value. */
6736 char *release
= get_operating_system_release();
6737 if (!release
|| !release
[0] || (release
[0] < MIN_PTY_KERNEL_VERSION
6738 && release
[1] == '.')) {
6739 Vprocess_connection_type
= Qnil
;
6748 Qprocessp
= intern ("processp");
6749 staticpro (&Qprocessp
);
6750 Qrun
= intern ("run");
6752 Qstop
= intern ("stop");
6754 Qsignal
= intern ("signal");
6755 staticpro (&Qsignal
);
6757 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
6760 Qexit = intern ("exit");
6761 staticpro (&Qexit); */
6763 Qopen
= intern ("open");
6765 Qclosed
= intern ("closed");
6766 staticpro (&Qclosed
);
6767 Qconnect
= intern ("connect");
6768 staticpro (&Qconnect
);
6769 Qfailed
= intern ("failed");
6770 staticpro (&Qfailed
);
6771 Qlisten
= intern ("listen");
6772 staticpro (&Qlisten
);
6773 Qlocal
= intern ("local");
6774 staticpro (&Qlocal
);
6775 Qdatagram
= intern ("datagram");
6776 staticpro (&Qdatagram
);
6778 QCname
= intern (":name");
6779 staticpro (&QCname
);
6780 QCbuffer
= intern (":buffer");
6781 staticpro (&QCbuffer
);
6782 QChost
= intern (":host");
6783 staticpro (&QChost
);
6784 QCservice
= intern (":service");
6785 staticpro (&QCservice
);
6786 QCtype
= intern (":type");
6787 staticpro (&QCtype
);
6788 QClocal
= intern (":local");
6789 staticpro (&QClocal
);
6790 QCremote
= intern (":remote");
6791 staticpro (&QCremote
);
6792 QCcoding
= intern (":coding");
6793 staticpro (&QCcoding
);
6794 QCserver
= intern (":server");
6795 staticpro (&QCserver
);
6796 QCnowait
= intern (":nowait");
6797 staticpro (&QCnowait
);
6798 QCsentinel
= intern (":sentinel");
6799 staticpro (&QCsentinel
);
6800 QClog
= intern (":log");
6802 QCnoquery
= intern (":noquery");
6803 staticpro (&QCnoquery
);
6804 QCstop
= intern (":stop");
6805 staticpro (&QCstop
);
6806 QCoptions
= intern (":options");
6807 staticpro (&QCoptions
);
6808 QCplist
= intern (":plist");
6809 staticpro (&QCplist
);
6810 QCfilter_multibyte
= intern (":filter-multibyte");
6811 staticpro (&QCfilter_multibyte
);
6813 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
6814 staticpro (&Qlast_nonmenu_event
);
6816 staticpro (&Vprocess_alist
);
6818 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
6819 doc
: /* *Non-nil means delete processes immediately when they exit.
6820 nil means don't delete them until `list-processes' is run. */);
6822 delete_exited_processes
= 1;
6824 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
6825 doc
: /* Control type of device used to communicate with subprocesses.
6826 Values are nil to use a pipe, or t or `pty' to use a pty.
6827 The value has no effect if the system has no ptys or if all ptys are busy:
6828 then a pipe is used in any case.
6829 The value takes effect when `start-process' is called. */);
6830 Vprocess_connection_type
= Qt
;
6832 #ifdef ADAPTIVE_READ_BUFFERING
6833 DEFVAR_LISP ("process-adaptive-read-buffering", &Vprocess_adaptive_read_buffering
,
6834 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
6835 On some systems, when Emacs reads the output from a subprocess, the output data
6836 is read in very small blocks, potentially resulting in very poor performance.
6837 This behavior can be remedied to some extent by setting this variable to a
6838 non-nil value, as it will automatically delay reading from such processes, to
6839 allowing them to produce more output before Emacs tries to read it.
6840 If the value is t, the delay is reset after each write to the process; any other
6841 non-nil value means that the delay is not reset on write.
6842 The variable takes effect when `start-process' is called. */);
6843 Vprocess_adaptive_read_buffering
= Qt
;
6846 defsubr (&Sprocessp
);
6847 defsubr (&Sget_process
);
6848 defsubr (&Sget_buffer_process
);
6849 defsubr (&Sdelete_process
);
6850 defsubr (&Sprocess_status
);
6851 defsubr (&Sprocess_exit_status
);
6852 defsubr (&Sprocess_id
);
6853 defsubr (&Sprocess_name
);
6854 defsubr (&Sprocess_tty_name
);
6855 defsubr (&Sprocess_command
);
6856 defsubr (&Sset_process_buffer
);
6857 defsubr (&Sprocess_buffer
);
6858 defsubr (&Sprocess_mark
);
6859 defsubr (&Sset_process_filter
);
6860 defsubr (&Sprocess_filter
);
6861 defsubr (&Sset_process_sentinel
);
6862 defsubr (&Sprocess_sentinel
);
6863 defsubr (&Sset_process_window_size
);
6864 defsubr (&Sset_process_inherit_coding_system_flag
);
6865 defsubr (&Sprocess_inherit_coding_system_flag
);
6866 defsubr (&Sset_process_query_on_exit_flag
);
6867 defsubr (&Sprocess_query_on_exit_flag
);
6868 defsubr (&Sprocess_contact
);
6869 defsubr (&Sprocess_plist
);
6870 defsubr (&Sset_process_plist
);
6871 defsubr (&Slist_processes
);
6872 defsubr (&Sprocess_list
);
6873 defsubr (&Sstart_process
);
6875 defsubr (&Sset_network_process_option
);
6876 defsubr (&Smake_network_process
);
6877 defsubr (&Sformat_network_address
);
6878 #endif /* HAVE_SOCKETS */
6879 #if defined(HAVE_SOCKETS) && defined(HAVE_NET_IF_H) && defined(HAVE_SYS_IOCTL_H)
6881 defsubr (&Snetwork_interface_list
);
6883 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
6884 defsubr (&Snetwork_interface_info
);
6886 #endif /* HAVE_SOCKETS ... */
6887 #ifdef DATAGRAM_SOCKETS
6888 defsubr (&Sprocess_datagram_address
);
6889 defsubr (&Sset_process_datagram_address
);
6891 defsubr (&Saccept_process_output
);
6892 defsubr (&Sprocess_send_region
);
6893 defsubr (&Sprocess_send_string
);
6894 defsubr (&Sinterrupt_process
);
6895 defsubr (&Skill_process
);
6896 defsubr (&Squit_process
);
6897 defsubr (&Sstop_process
);
6898 defsubr (&Scontinue_process
);
6899 defsubr (&Sprocess_running_child_p
);
6900 defsubr (&Sprocess_send_eof
);
6901 defsubr (&Ssignal_process
);
6902 defsubr (&Swaiting_for_user_input_p
);
6903 /* defsubr (&Sprocess_connection); */
6904 defsubr (&Sset_process_coding_system
);
6905 defsubr (&Sprocess_coding_system
);
6906 defsubr (&Sset_process_filter_multibyte
);
6907 defsubr (&Sprocess_filter_multibyte_p
);
6911 #else /* not subprocesses */
6913 #include <sys/types.h>
6917 #include "systime.h"
6918 #include "charset.h"
6920 #include "termopts.h"
6921 #include "sysselect.h"
6923 extern int frame_garbaged
;
6925 extern EMACS_TIME
timer_check ();
6926 extern int timers_run
;
6930 /* As described above, except assuming that there are no subprocesses:
6932 Wait for timeout to elapse and/or keyboard input to be available.
6935 timeout in seconds, or
6936 zero for no limit, or
6937 -1 means gobble data immediately available but don't wait for any.
6939 read_kbd is a Lisp_Object:
6940 0 to ignore keyboard input, or
6941 1 to return when input is available, or
6942 -1 means caller will actually read the input, so don't throw to
6945 see full version for other parameters. We know that wait_proc will
6946 always be NULL, since `subprocesses' isn't defined.
6948 do_display != 0 means redisplay should be done to show subprocess
6949 output that arrives.
6951 Return true iff we received input from any process. */
6954 wait_reading_process_output (time_limit
, microsecs
, read_kbd
, do_display
,
6955 wait_for_cell
, wait_proc
, just_wait_proc
)
6956 int time_limit
, microsecs
, read_kbd
, do_display
;
6957 Lisp_Object wait_for_cell
;
6958 struct Lisp_Process
*wait_proc
;
6962 EMACS_TIME end_time
, timeout
;
6963 SELECT_TYPE waitchannels
;
6966 /* What does time_limit really mean? */
6967 if (time_limit
|| microsecs
)
6969 EMACS_GET_TIME (end_time
);
6970 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
6971 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6974 /* Turn off periodic alarms (in case they are in use)
6975 and then turn off any other atimers,
6976 because the select emulator uses alarms. */
6978 turn_on_atimers (0);
6982 int timeout_reduced_for_timers
= 0;
6984 /* If calling from keyboard input, do not quit
6985 since we want to return C-g as an input character.
6986 Otherwise, do pending quit if requested. */
6990 /* Exit now if the cell we're waiting for became non-nil. */
6991 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6994 /* Compute time from now till when time limit is up */
6995 /* Exit if already run out */
6996 if (time_limit
== -1)
6998 /* -1 specified for timeout means
6999 gobble output available now
7000 but don't wait at all. */
7002 EMACS_SET_SECS_USECS (timeout
, 0, 0);
7004 else if (time_limit
|| microsecs
)
7006 EMACS_GET_TIME (timeout
);
7007 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
7008 if (EMACS_TIME_NEG_P (timeout
))
7013 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
7016 /* If our caller will not immediately handle keyboard events,
7017 run timer events directly.
7018 (Callers that will immediately read keyboard events
7019 call timer_delay on their own.) */
7020 if (NILP (wait_for_cell
))
7022 EMACS_TIME timer_delay
;
7026 int old_timers_run
= timers_run
;
7027 timer_delay
= timer_check (1);
7028 if (timers_run
!= old_timers_run
&& do_display
)
7029 /* We must retry, since a timer may have requeued itself
7030 and that could alter the time delay. */
7031 redisplay_preserve_echo_area (14);
7035 while (!detect_input_pending ());
7037 /* If there is unread keyboard input, also return. */
7039 && requeued_events_pending_p ())
7042 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
7044 EMACS_TIME difference
;
7045 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
7046 if (EMACS_TIME_NEG_P (difference
))
7048 timeout
= timer_delay
;
7049 timeout_reduced_for_timers
= 1;
7054 /* Cause C-g and alarm signals to take immediate action,
7055 and cause input available signals to zero out timeout. */
7057 set_waiting_for_input (&timeout
);
7059 /* Wait till there is something to do. */
7061 if (! read_kbd
&& NILP (wait_for_cell
))
7062 FD_ZERO (&waitchannels
);
7064 FD_SET (0, &waitchannels
);
7066 /* If a frame has been newly mapped and needs updating,
7067 reprocess its display stuff. */
7068 if (frame_garbaged
&& do_display
)
7070 clear_waiting_for_input ();
7071 redisplay_preserve_echo_area (15);
7073 set_waiting_for_input (&timeout
);
7076 if (read_kbd
&& detect_input_pending ())
7079 FD_ZERO (&waitchannels
);
7082 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
7087 /* Make C-g and alarm signals set flags again */
7088 clear_waiting_for_input ();
7090 /* If we woke up due to SIGWINCH, actually change size now. */
7091 do_pending_window_change (0);
7093 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
7094 /* We waited the full specified time, so return now. */
7099 /* If the system call was interrupted, then go around the
7101 if (xerrno
== EINTR
)
7102 FD_ZERO (&waitchannels
);
7104 error ("select error: %s", emacs_strerror (xerrno
));
7107 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
7108 /* System sometimes fails to deliver SIGIO. */
7109 kill (getpid (), SIGIO
);
7112 if (read_kbd
&& interrupt_input
&& (waitchannels
& 1))
7113 kill (getpid (), SIGIO
);
7116 /* Check for keyboard input */
7119 && detect_input_pending_run_timers (do_display
))
7121 swallow_events (do_display
);
7122 if (detect_input_pending_run_timers (do_display
))
7126 /* If there is unread keyboard input, also return. */
7128 && requeued_events_pending_p ())
7131 /* If wait_for_cell. check for keyboard input
7132 but don't run any timers.
7133 ??? (It seems wrong to me to check for keyboard
7134 input at all when wait_for_cell, but the code
7135 has been this way since July 1994.
7136 Try changing this after version 19.31.) */
7137 if (! NILP (wait_for_cell
)
7138 && detect_input_pending ())
7140 swallow_events (do_display
);
7141 if (detect_input_pending ())
7145 /* Exit now if the cell we're waiting for became non-nil. */
7146 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7156 /* Don't confuse make-docfile by having two doc strings for this function.
7157 make-docfile does not pay attention to #if, for good reason! */
7158 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7161 register Lisp_Object name
;
7166 /* Don't confuse make-docfile by having two doc strings for this function.
7167 make-docfile does not pay attention to #if, for good reason! */
7168 DEFUN ("process-inherit-coding-system-flag",
7169 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7173 register Lisp_Object process
;
7175 /* Ignore the argument and return the value of
7176 inherit-process-coding-system. */
7177 return inherit_process_coding_system
? Qt
: Qnil
;
7180 /* Kill all processes associated with `buffer'.
7181 If `buffer' is nil, kill all processes.
7182 Since we have no subprocesses, this does nothing. */
7185 kill_buffer_processes (buffer
)
7198 QCtype
= intern (":type");
7199 staticpro (&QCtype
);
7201 defsubr (&Sget_buffer_process
);
7202 defsubr (&Sprocess_inherit_coding_system_flag
);
7206 #endif /* not subprocesses */
7208 /* arch-tag: 3706c011-7b9a-4117-bd4f-59e7f701a4c4
7209 (do not change this comment) */