1 /* Asynchronous subprocess control for GNU Emacs.
2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 96, 1998
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
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 */
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 */
60 #endif /* HAVE_SOCKETS */
62 /* TERM is a poor-man's SLIP, used on Linux. */
67 /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */
68 #ifdef HAVE_BROKEN_INET_ADDR
69 #define IN_ADDR struct in_addr
70 #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1)
72 #define IN_ADDR unsigned long
73 #define NUMERIC_ADDR_ERROR (numeric_addr == -1)
76 #if defined(BSD_SYSTEM) || defined(STRIDE)
77 #include <sys/ioctl.h>
78 #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5)
80 #endif /* HAVE_PTYS and no O_NDELAY */
81 #endif /* BSD_SYSTEM || STRIDE */
83 #ifdef BROKEN_O_NONBLOCK
85 #endif /* BROKEN_O_NONBLOCK */
92 #include <sys/sysmacros.h> /* for "minor" */
104 #include "termhooks.h"
105 #include "termopts.h"
106 #include "commands.h"
108 #include "blockinput.h"
109 #include "keyboard.h"
110 #include "dispextern.h"
112 #define max(a, b) ((a) > (b) ? (a) : (b))
114 Lisp_Object Qprocessp
;
115 Lisp_Object Qrun
, Qstop
, Qsignal
, Qopen
, Qclosed
;
116 Lisp_Object Qlast_nonmenu_event
;
117 /* Qexit is declared and initialized in eval.c. */
119 /* a process object is a network connection when its childp field is neither
120 Qt nor Qnil but is instead a cons cell (HOSTNAME PORTNUM). */
123 #define NETCONN_P(p) (GC_CONSP (XPROCESS (p)->childp))
125 #define NETCONN_P(p) 0
126 #endif /* HAVE_SOCKETS */
128 /* Define first descriptor number available for subprocesses. */
130 #define FIRST_PROC_DESC 1
132 #define FIRST_PROC_DESC 3
135 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
138 #if !defined (SIGCHLD) && defined (SIGCLD)
139 #define SIGCHLD SIGCLD
142 #include "syssignal.h"
147 extern char *strerror ();
149 extern char *sys_errlist
[];
156 #ifndef SYS_SIGLIST_DECLARED
161 extern char *sys_siglist
[];
162 #endif /* not LINUX */
164 char *sys_siglist
[] =
170 "illegal instruction",
174 "floating point exception",
177 "segmentation violation",
178 "bad argument to system call",
179 "write on a pipe with no one to read it",
181 "software termination signal from kill",
183 "sendable stop signal not from tty",
184 "stop signal from tty",
185 "continue a stopped process",
186 "child status has changed",
187 "background read attempted from control tty",
188 "background write attempted from control tty",
189 "input record available at control tty",
190 "exceeded CPU time limit",
191 "exceeded file size limit"
193 #endif /* not WINDOWSNT */
196 #endif /* ! SYS_SIGLIST_DECLARED */
198 /* t means use pty, nil means use a pipe,
199 maybe other values to come. */
200 static Lisp_Object Vprocess_connection_type
;
204 #include <sys/socket.h>
208 /* These next two vars are non-static since sysdep.c uses them in the
209 emulation of `select'. */
210 /* Number of events of change of status of a process. */
212 /* Number of events for which the user or sentinel has been notified. */
215 #include "sysselect.h"
217 /* If we support a window system, turn on the code to poll periodically
218 to detect C-g. It isn't actually used when doing interrupt input. */
219 #ifdef HAVE_WINDOW_SYSTEM
220 #define POLL_FOR_INPUT
223 /* Mask of bits indicating the descriptors that we wait for input on. */
225 static SELECT_TYPE input_wait_mask
;
227 /* Mask that excludes keyboard input descriptor (s). */
229 static SELECT_TYPE non_keyboard_wait_mask
;
231 /* Mask that excludes process input descriptor (s). */
233 static SELECT_TYPE non_process_wait_mask
;
235 /* The largest descriptor currently in use for a process object. */
236 static int max_process_desc
;
238 /* The largest descriptor currently in use for keyboard input. */
239 static int max_keyboard_desc
;
241 /* Nonzero means delete a process right away if it exits. */
242 static int delete_exited_processes
;
244 /* Indexed by descriptor, gives the process (if any) for that descriptor */
245 Lisp_Object chan_process
[MAXDESC
];
247 /* Alist of elements (NAME . PROCESS) */
248 Lisp_Object Vprocess_alist
;
250 /* Buffered-ahead input char from process, indexed by channel.
251 -1 means empty (no char is buffered).
252 Used on sys V where the only way to tell if there is any
253 output from the process is to read at least one char.
254 Always -1 on systems that support FIONREAD. */
256 /* Don't make static; need to access externally. */
257 int proc_buffered_char
[MAXDESC
];
259 /* Table of `struct coding-system' for each process. */
260 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
261 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
263 static Lisp_Object
get_process ();
265 extern EMACS_TIME
timer_check ();
266 extern int timers_run
;
268 /* Maximum number of bytes to send to a pty without an eof. */
269 static int pty_max_bytes
;
271 extern Lisp_Object Vfile_name_coding_system
, Vdefault_file_name_coding_system
;
274 /* The file name of the pty opened by allocate_pty. */
276 static char pty_name
[24];
279 /* Compute the Lisp form of the process status, p->status, from
280 the numeric status that was returned by `wait'. */
282 Lisp_Object
status_convert ();
286 struct Lisp_Process
*p
;
288 union { int i
; WAITTYPE wt
; } u
;
289 u
.i
= XFASTINT (p
->raw_status_low
) + (XFASTINT (p
->raw_status_high
) << 16);
290 p
->status
= status_convert (u
.wt
);
291 p
->raw_status_low
= Qnil
;
292 p
->raw_status_high
= Qnil
;
295 /* Convert a process status word in Unix format to
296 the list that we use internally. */
303 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
304 else if (WIFEXITED (w
))
305 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
306 WCOREDUMP (w
) ? Qt
: Qnil
));
307 else if (WIFSIGNALED (w
))
308 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
309 WCOREDUMP (w
) ? Qt
: Qnil
));
314 /* Given a status-list, extract the three pieces of information
315 and store them individually through the three pointers. */
318 decode_status (l
, symbol
, code
, coredump
)
334 *symbol
= XCONS (l
)->car
;
335 tem
= XCONS (l
)->cdr
;
336 *code
= XFASTINT (XCONS (tem
)->car
);
337 tem
= XCONS (tem
)->cdr
;
338 *coredump
= !NILP (tem
);
342 /* Return a string describing a process status list. */
345 status_message (status
)
350 Lisp_Object string
, string2
;
352 decode_status (status
, &symbol
, &code
, &coredump
);
354 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
360 /* Cast to suppress warning if the table has const char *. */
361 signame
= (char *) sys_siglist
[code
];
363 signame
= sys_errlist
[code
];
368 string
= build_string (signame
);
369 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
370 XSTRING (string
)->data
[0] = DOWNCASE (XSTRING (string
)->data
[0]);
371 return concat2 (string
, string2
);
373 else if (EQ (symbol
, Qexit
))
376 return build_string ("finished\n");
377 string
= Fnumber_to_string (make_number (code
));
378 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
379 return concat2 (build_string ("exited abnormally with code "),
380 concat2 (string
, string2
));
383 return Fcopy_sequence (Fsymbol_name (symbol
));
388 /* Open an available pty, returning a file descriptor.
389 Return -1 on failure.
390 The file name of the terminal corresponding to the pty
391 is left in the variable pty_name. */
400 /* Some systems name their pseudoterminals so that there are gaps in
401 the usual sequence - for example, on HP9000/S700 systems, there
402 are no pseudoterminals with names ending in 'f'. So we wait for
403 three failures in a row before deciding that we've reached the
405 int failed_count
= 0;
410 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
411 for (i
= 0; i
< 16; i
++)
414 #ifdef PTY_NAME_SPRINTF
417 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
418 #endif /* no PTY_NAME_SPRINTF */
422 #else /* no PTY_OPEN */
424 /* Unusual IRIS code */
425 *ptyv
= open ("/dev/ptc", O_RDWR
| O_NDELAY
, 0);
428 if (fstat (fd
, &stb
) < 0)
431 if (stat (pty_name
, &stb
) < 0)
434 if (failed_count
>= 3)
440 fd
= open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
442 fd
= open (pty_name
, O_RDWR
| O_NDELAY
, 0);
444 #endif /* not IRIS */
445 #endif /* no PTY_OPEN */
449 /* check to make certain that both sides are available
450 this avoids a nasty yet stupid bug in rlogins */
451 #ifdef PTY_TTY_NAME_SPRINTF
454 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
455 #endif /* no PTY_TTY_NAME_SPRINTF */
457 if (access (pty_name
, 6) != 0)
460 #if !defined(IRIS) && !defined(__sgi)
466 #endif /* not UNIPLUS */
473 #endif /* HAVE_PTYS */
479 struct Lisp_Vector
*vec
;
480 register Lisp_Object val
, tem
, name1
;
481 register struct Lisp_Process
*p
;
485 vec
= allocate_vectorlike ((EMACS_INT
) VECSIZE (struct Lisp_Process
));
486 for (i
= 0; i
< VECSIZE (struct Lisp_Process
); i
++)
487 vec
->contents
[i
] = Qnil
;
488 vec
->size
= VECSIZE (struct Lisp_Process
);
489 p
= (struct Lisp_Process
*)vec
;
491 XSETINT (p
->infd
, -1);
492 XSETINT (p
->outfd
, -1);
493 XSETFASTINT (p
->pid
, 0);
494 XSETFASTINT (p
->tick
, 0);
495 XSETFASTINT (p
->update_tick
, 0);
496 p
->raw_status_low
= Qnil
;
497 p
->raw_status_high
= Qnil
;
499 p
->mark
= Fmake_marker ();
501 /* If name is already in use, modify it until it is unused. */
506 tem
= Fget_process (name1
);
507 if (NILP (tem
)) break;
508 sprintf (suffix
, "<%d>", i
);
509 name1
= concat2 (name
, build_string (suffix
));
513 XSETPROCESS (val
, p
);
514 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
519 remove_process (proc
)
520 register Lisp_Object proc
;
522 register Lisp_Object pair
;
524 pair
= Frassq (proc
, Vprocess_alist
);
525 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
527 deactivate_process (proc
);
530 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
531 "Return t if OBJECT is a process.")
535 return PROCESSP (object
) ? Qt
: Qnil
;
538 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
539 "Return the process named NAME, or nil if there is none.")
541 register Lisp_Object name
;
545 CHECK_STRING (name
, 0);
546 return Fcdr (Fassoc (name
, Vprocess_alist
));
549 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
550 "Return the (or a) process associated with BUFFER.\n\
551 BUFFER may be a buffer or the name of one.")
553 register Lisp_Object buffer
;
555 register Lisp_Object buf
, tail
, proc
;
557 if (NILP (buffer
)) return Qnil
;
558 buf
= Fget_buffer (buffer
);
559 if (NILP (buf
)) return Qnil
;
561 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
563 proc
= Fcdr (Fcar (tail
));
564 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
570 /* This is how commands for the user decode process arguments. It
571 accepts a process, a process name, a buffer, a buffer name, or nil.
572 Buffers denote the first process in the buffer, and nil denotes the
577 register Lisp_Object name
;
579 register Lisp_Object proc
, obj
;
582 obj
= Fget_process (name
);
584 obj
= Fget_buffer (name
);
586 error ("Process %s does not exist", XSTRING (name
)->data
);
588 else if (NILP (name
))
589 obj
= Fcurrent_buffer ();
593 /* Now obj should be either a buffer object or a process object.
597 proc
= Fget_buffer_process (obj
);
599 error ("Buffer %s has no process", XSTRING (XBUFFER (obj
)->name
)->data
);
603 CHECK_PROCESS (obj
, 0);
609 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
610 "Delete PROCESS: kill it and forget about it immediately.\n\
611 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
612 nil, indicating the current buffer's process.")
614 register Lisp_Object process
;
616 process
= get_process (process
);
617 XPROCESS (process
)->raw_status_low
= Qnil
;
618 XPROCESS (process
)->raw_status_high
= Qnil
;
619 if (NETCONN_P (process
))
621 XPROCESS (process
)->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
622 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
624 else if (XINT (XPROCESS (process
)->infd
) >= 0)
626 Fkill_process (process
, Qnil
);
627 /* Do this now, since remove_process will make sigchld_handler do nothing. */
628 XPROCESS (process
)->status
629 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
630 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
633 remove_process (process
);
637 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
638 "Return the status of PROCESS.\n\
639 The returned value is one of the following symbols:\n\
640 run -- for a process that is running.\n\
641 stop -- for a process stopped but continuable.\n\
642 exit -- for a process that has exited.\n\
643 signal -- for a process that has got a fatal signal.\n\
644 open -- for a network stream connection that is open.\n\
645 closed -- for a network stream connection that is closed.\n\
646 nil -- if arg is a process name and no such process exists.\n\
647 PROCESS may be a process, a buffer, the name of a process, or\n\
648 nil, indicating the current buffer's process.")
650 register Lisp_Object process
;
652 register struct Lisp_Process
*p
;
653 register Lisp_Object status
;
655 if (STRINGP (process
))
656 process
= Fget_process (process
);
658 process
= get_process (process
);
663 p
= XPROCESS (process
);
664 if (!NILP (p
->raw_status_low
))
668 status
= XCONS (status
)->car
;
669 if (NETCONN_P (process
))
671 if (EQ (status
, Qrun
))
673 else if (EQ (status
, Qexit
))
679 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
681 "Return the exit status of PROCESS or the signal number that killed it.\n\
682 If PROCESS has not yet exited or died, return 0.")
684 register Lisp_Object process
;
686 CHECK_PROCESS (process
, 0);
687 if (!NILP (XPROCESS (process
)->raw_status_low
))
688 update_status (XPROCESS (process
));
689 if (CONSP (XPROCESS (process
)->status
))
690 return XCONS (XCONS (XPROCESS (process
)->status
)->cdr
)->car
;
691 return make_number (0);
694 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
695 "Return the process id of PROCESS.\n\
696 This is the pid of the Unix process which PROCESS uses or talks to.\n\
697 For a network connection, this value is nil.")
699 register Lisp_Object process
;
701 CHECK_PROCESS (process
, 0);
702 return XPROCESS (process
)->pid
;
705 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
706 "Return the name of PROCESS, as a string.\n\
707 This is the name of the program invoked in PROCESS,\n\
708 possibly modified to make it unique among process names.")
710 register Lisp_Object process
;
712 CHECK_PROCESS (process
, 0);
713 return XPROCESS (process
)->name
;
716 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
717 "Return the command that was executed to start PROCESS.\n\
718 This is a list of strings, the first string being the program executed\n\
719 and the rest of the strings being the arguments given to it.\n\
720 For a non-child channel, this is nil.")
722 register Lisp_Object process
;
724 CHECK_PROCESS (process
, 0);
725 return XPROCESS (process
)->command
;
728 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
729 "Return the name of the terminal PROCESS uses, or nil if none.\n\
730 This is the terminal that the process itself reads and writes on,\n\
731 not the name of the pty that Emacs uses to talk with that terminal.")
733 register Lisp_Object process
;
735 CHECK_PROCESS (process
, 0);
736 return XPROCESS (process
)->tty_name
;
739 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
741 "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).")
743 register Lisp_Object process
, buffer
;
745 CHECK_PROCESS (process
, 0);
747 CHECK_BUFFER (buffer
, 1);
748 XPROCESS (process
)->buffer
= buffer
;
752 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
754 "Return the buffer PROCESS is associated with.\n\
755 Output from PROCESS is inserted in this buffer unless PROCESS has a filter.")
757 register Lisp_Object process
;
759 CHECK_PROCESS (process
, 0);
760 return XPROCESS (process
)->buffer
;
763 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
765 "Return the marker for the end of the last output from PROCESS.")
767 register Lisp_Object process
;
769 CHECK_PROCESS (process
, 0);
770 return XPROCESS (process
)->mark
;
773 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
775 "Give PROCESS the filter function FILTER; nil means no filter.\n\
776 t means stop accepting output from the process.\n\
777 When a process has a filter, each time it does output\n\
778 the entire string of output is passed to the filter.\n\
779 The filter gets two arguments: the process and the string of output.\n\
780 If the process has a filter, its buffer is not used for output.")
782 register Lisp_Object process
, filter
;
784 CHECK_PROCESS (process
, 0);
787 FD_CLR (XINT (XPROCESS (process
)->infd
), &input_wait_mask
);
788 FD_CLR (XINT (XPROCESS (process
)->infd
), &non_keyboard_wait_mask
);
790 else if (EQ (XPROCESS (process
)->filter
, Qt
))
792 FD_SET (XINT (XPROCESS (process
)->infd
), &input_wait_mask
);
793 FD_SET (XINT (XPROCESS (process
)->infd
), &non_keyboard_wait_mask
);
795 XPROCESS (process
)->filter
= filter
;
799 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
801 "Returns the filter function of PROCESS; nil if none.\n\
802 See `set-process-filter' for more info on filter functions.")
804 register Lisp_Object process
;
806 CHECK_PROCESS (process
, 0);
807 return XPROCESS (process
)->filter
;
810 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
812 "Give PROCESS the sentinel SENTINEL; nil for none.\n\
813 The sentinel is called as a function when the process changes state.\n\
814 It gets two arguments: the process, and a string describing the change.")
816 register Lisp_Object process
, sentinel
;
818 CHECK_PROCESS (process
, 0);
819 XPROCESS (process
)->sentinel
= sentinel
;
823 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
825 "Return the sentinel of PROCESS; nil if none.\n\
826 See `set-process-sentinel' for more info on sentinels.")
828 register Lisp_Object process
;
830 CHECK_PROCESS (process
, 0);
831 return XPROCESS (process
)->sentinel
;
834 DEFUN ("set-process-window-size", Fset_process_window_size
,
835 Sset_process_window_size
, 3, 3, 0,
836 "Tell PROCESS that it has logical window size HEIGHT and WIDTH.")
837 (process
, height
, width
)
838 register Lisp_Object process
, height
, width
;
840 CHECK_PROCESS (process
, 0);
841 CHECK_NATNUM (height
, 0);
842 CHECK_NATNUM (width
, 0);
843 if (set_window_size (XINT (XPROCESS (process
)->infd
),
844 XINT (height
), XINT(width
)) <= 0)
850 DEFUN ("set-process-inherit-coding-system-flag",
851 Fset_process_inherit_coding_system_flag
,
852 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
853 "Determine whether buffer of PROCESS will inherit coding-system.\n\
854 If the second argument FLAG is non-nil, then the variable\n\
855 `buffer-file-coding-system' of the buffer associated with PROCESS\n\
856 will be bound to the value of the coding system used to decode\n\
857 the process output.\n\
859 This is useful when the coding system specified for the process buffer\n\
860 leaves either the character code conversion or the end-of-line conversion\n\
861 unspecified, or if the coding system used to decode the process output\n\
862 is more appropriate for saving the process buffer.\n\
864 Binding the variable `inherit-process-coding-system' to non-nil before\n\
865 starting the process is an alternative way of setting the inherit flag\n\
866 for the process which will run.")
868 register Lisp_Object process
, flag
;
870 CHECK_PROCESS (process
, 0);
871 XPROCESS (process
)->inherit_coding_system_flag
= flag
;
875 DEFUN ("process-inherit-coding-system-flag",
876 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
878 "Return the value of inherit-coding-system flag for PROCESS.\n\
879 If this flag is t, `buffer-file-coding-system' of the buffer\n\
880 associated with PROCESS will inherit the coding system used to decode\n\
881 the process output.")
883 register Lisp_Object process
;
885 CHECK_PROCESS (process
, 0);
886 return XPROCESS (process
)->inherit_coding_system_flag
;
889 DEFUN ("process-kill-without-query", Fprocess_kill_without_query
,
890 Sprocess_kill_without_query
, 1, 2, 0,
891 "Say no query needed if PROCESS is running when Emacs is exited.\n\
892 Optional second argument if non-nil says to require a query.\n\
893 Value is t if a query was formerly required.")
895 register Lisp_Object process
, value
;
899 CHECK_PROCESS (process
, 0);
900 tem
= XPROCESS (process
)->kill_without_query
;
901 XPROCESS (process
)->kill_without_query
= Fnull (value
);
906 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
908 "Return the contact info of PROCESS; t for a real child.\n\
909 For a net connection, the value is a cons cell of the form (HOST SERVICE).")
911 register Lisp_Object process
;
913 CHECK_PROCESS (process
, 0);
914 return XPROCESS (process
)->childp
;
917 #if 0 /* Turned off because we don't currently record this info
918 in the process. Perhaps add it. */
919 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
920 "Return the connection type of PROCESS.\n\
921 The value is nil for a pipe, t or `pty' for a pty, or `stream' for\n\
922 a socket connection.")
926 return XPROCESS (process
)->type
;
933 register Lisp_Object tail
, tem
;
934 Lisp_Object proc
, minspace
, tem1
;
935 register struct buffer
*old
= current_buffer
;
936 register struct Lisp_Process
*p
;
940 XSETFASTINT (minspace
, 1);
942 set_buffer_internal (XBUFFER (Vstandard_output
));
943 Fbuffer_disable_undo (Vstandard_output
);
945 current_buffer
->truncate_lines
= Qt
;
948 Proc Status Buffer Tty Command\n\
949 ---- ------ ------ --- -------\n", -1);
951 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
955 proc
= Fcdr (Fcar (tail
));
957 if (NILP (p
->childp
))
960 Finsert (1, &p
->name
);
961 Findent_to (make_number (13), minspace
);
963 if (!NILP (p
->raw_status_low
))
966 if (CONSP (p
->status
))
967 symbol
= XCONS (p
->status
)->car
;
970 if (EQ (symbol
, Qsignal
))
973 tem
= Fcar (Fcdr (p
->status
));
975 if (XINT (tem
) < NSIG
)
976 write_string (sys_errlist
[XINT (tem
)], -1);
979 Fprinc (symbol
, Qnil
);
981 else if (NETCONN_P (proc
))
983 if (EQ (symbol
, Qrun
))
984 write_string ("open", -1);
985 else if (EQ (symbol
, Qexit
))
986 write_string ("closed", -1);
988 Fprinc (symbol
, Qnil
);
991 Fprinc (symbol
, Qnil
);
993 if (EQ (symbol
, Qexit
))
996 tem
= Fcar (Fcdr (p
->status
));
999 sprintf (tembuf
, " %d", (int) XFASTINT (tem
));
1000 write_string (tembuf
, -1);
1004 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
1005 remove_process (proc
);
1007 Findent_to (make_number (22), minspace
);
1008 if (NILP (p
->buffer
))
1009 insert_string ("(none)");
1010 else if (NILP (XBUFFER (p
->buffer
)->name
))
1011 insert_string ("(Killed)");
1013 Finsert (1, &XBUFFER (p
->buffer
)->name
);
1015 Findent_to (make_number (37), minspace
);
1017 if (STRINGP (p
->tty_name
))
1018 Finsert (1, &p
->tty_name
);
1020 insert_string ("(none)");
1022 Findent_to (make_number (49), minspace
);
1024 if (NETCONN_P (proc
))
1026 sprintf (tembuf
, "(network stream connection to %s)\n",
1027 XSTRING (XCONS (p
->childp
)->car
)->data
);
1028 insert_string (tembuf
);
1040 insert_string (" ");
1042 insert_string ("\n");
1048 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 0, "",
1049 "Display a list of all processes.\n\
1050 Any process listed as exited or signaled is actually eliminated\n\
1051 after the listing is made.")
1054 internal_with_output_to_temp_buffer ("*Process List*",
1055 list_processes_1
, Qnil
);
1059 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1060 "Return a list of all processes.")
1063 return Fmapcar (Qcdr
, Vprocess_alist
);
1066 /* Starting asynchronous inferior processes. */
1068 static Lisp_Object
start_process_unwind ();
1070 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1071 "Start a program in a subprocess. Return the process object for it.\n\
1072 Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\
1073 NAME is name for process. It is modified if necessary to make it unique.\n\
1074 BUFFER is the buffer or (buffer-name) to associate with the process.\n\
1075 Process output goes at end of that buffer, unless you specify\n\
1076 an output stream or filter function to handle the output.\n\
1077 BUFFER may be also nil, meaning that this process is not associated\n\
1079 Third arg is program file name. It is searched for in PATH.\n\
1080 Remaining arguments are strings to give program as arguments.")
1083 register Lisp_Object
*args
;
1085 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1087 register unsigned char *new_argv
;
1090 register unsigned char **new_argv
;
1093 int count
= specpdl_ptr
- specpdl
;
1097 buffer
= Fget_buffer_create (buffer
);
1099 /* Make sure that the child will be able to chdir to the current
1100 buffer's current directory, or its unhandled equivalent. We
1101 can't just have the child check for an error when it does the
1102 chdir, since it's in a vfork.
1104 We have to GCPRO around this because Fexpand_file_name and
1105 Funhandled_file_name_directory might call a file name handling
1106 function. The argument list is protected by the caller, so all
1107 we really have to worry about is buffer. */
1109 struct gcpro gcpro1
, gcpro2
;
1111 current_dir
= current_buffer
->directory
;
1113 GCPRO2 (buffer
, current_dir
);
1116 = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir
),
1118 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1119 report_file_error ("Setting current directory",
1120 Fcons (current_buffer
->directory
, Qnil
));
1126 CHECK_STRING (name
, 0);
1130 CHECK_STRING (program
, 2);
1133 /* Make a one member argv with all args concatenated
1134 together separated by a blank. */
1135 len
= STRING_BYTES (XSTRING (program
)) + 2;
1136 for (i
= 3; i
< nargs
; i
++)
1139 CHECK_STRING (tem
, i
);
1140 len
+= STRING_BYTES (XSTRING (tem
)) + 1; /* count the blank */
1142 new_argv
= (unsigned char *) alloca (len
);
1143 strcpy (new_argv
, XSTRING (program
)->data
);
1144 for (i
= 3; i
< nargs
; i
++)
1147 CHECK_STRING (tem
, i
);
1148 strcat (new_argv
, " ");
1149 strcat (new_argv
, XSTRING (tem
)->data
);
1151 /* Need to add code here to check for program existence on VMS */
1154 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1156 /* If program file name is not absolute, search our path for it */
1157 if (!IS_DIRECTORY_SEP (XSTRING (program
)->data
[0])
1158 && !(XSTRING (program
)->size
> 1
1159 && IS_DEVICE_SEP (XSTRING (program
)->data
[1])))
1161 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1164 GCPRO4 (name
, program
, buffer
, current_dir
);
1165 openp (Vexec_path
, program
, EXEC_SUFFIXES
, &tem
, 1);
1168 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1169 tem
= Fexpand_file_name (tem
, Qnil
);
1170 new_argv
[0] = XSTRING (tem
)->data
;
1174 if (!NILP (Ffile_directory_p (program
)))
1175 error ("Specified program for new process is a directory");
1177 new_argv
[0] = XSTRING (program
)->data
;
1180 for (i
= 3; i
< nargs
; i
++)
1183 CHECK_STRING (tem
, i
);
1184 new_argv
[i
- 2] = XSTRING (tem
)->data
;
1186 new_argv
[i
- 2] = 0;
1187 #endif /* not VMS */
1189 proc
= make_process (name
);
1190 /* If an error occurs and we can't start the process, we want to
1191 remove it from the process list. This means that each error
1192 check in create_process doesn't need to call remove_process
1193 itself; it's all taken care of here. */
1194 record_unwind_protect (start_process_unwind
, proc
);
1196 XPROCESS (proc
)->childp
= Qt
;
1197 XPROCESS (proc
)->command_channel_p
= Qnil
;
1198 XPROCESS (proc
)->buffer
= buffer
;
1199 XPROCESS (proc
)->sentinel
= Qnil
;
1200 XPROCESS (proc
)->filter
= Qnil
;
1201 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1203 /* Make the process marker point into the process buffer (if any). */
1205 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1206 BUF_ZV (XBUFFER (buffer
)),
1207 BUF_ZV_BYTE (XBUFFER (buffer
)));
1210 /* Decide coding systems for communicating with the process. Here
1211 we don't setup the structure coding_system nor pay attention to
1212 unibyte mode. They are done in create_process. */
1214 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1215 Lisp_Object coding_systems
= Qt
;
1216 Lisp_Object val
, *args2
;
1217 struct gcpro gcpro1
;
1219 val
= Vcoding_system_for_read
;
1222 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1223 args2
[0] = Qstart_process
;
1224 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1226 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1228 if (CONSP (coding_systems
))
1229 val
= XCONS (coding_systems
)->car
;
1230 else if (CONSP (Vdefault_process_coding_system
))
1231 val
= XCONS (Vdefault_process_coding_system
)->car
;
1233 XPROCESS (proc
)->decode_coding_system
= val
;
1235 val
= Vcoding_system_for_write
;
1238 if (EQ (coding_systems
, Qt
))
1240 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof args2
);
1241 args2
[0] = Qstart_process
;
1242 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1244 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1247 if (CONSP (coding_systems
))
1248 val
= XCONS (coding_systems
)->cdr
;
1249 else if (CONSP (Vdefault_process_coding_system
))
1250 val
= XCONS (Vdefault_process_coding_system
)->cdr
;
1252 XPROCESS (proc
)->encode_coding_system
= val
;
1255 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
1256 XPROCESS (proc
)->decoding_carryover
= make_number (0);
1257 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
1258 XPROCESS (proc
)->encoding_carryover
= make_number (0);
1260 XPROCESS (proc
)->inherit_coding_system_flag
1261 = (NILP (buffer
) || !inherit_process_coding_system
1264 create_process (proc
, (char **) new_argv
, current_dir
);
1266 return unbind_to (count
, proc
);
1269 /* This function is the unwind_protect form for Fstart_process. If
1270 PROC doesn't have its pid set, then we know someone has signaled
1271 an error and the process wasn't started successfully, so we should
1272 remove it from the process list. */
1274 start_process_unwind (proc
)
1277 if (!PROCESSP (proc
))
1280 /* Was PROC started successfully? */
1281 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1282 remove_process (proc
);
1289 create_process_1 (signo
)
1292 #if defined (USG) && !defined (POSIX_SIGNALS)
1293 /* USG systems forget handlers when they are used;
1294 must reestablish each time */
1295 signal (signo
, create_process_1
);
1299 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1302 /* Mimic blocking of signals on system V, which doesn't really have it. */
1304 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1305 int sigchld_deferred
;
1308 create_process_sigchld ()
1310 signal (SIGCHLD
, create_process_sigchld
);
1312 sigchld_deferred
= 1;
1318 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1320 create_process (process
, new_argv
, current_dir
)
1321 Lisp_Object process
;
1323 Lisp_Object current_dir
;
1325 int pid
, inchannel
, outchannel
;
1327 #ifdef POSIX_SIGNALS
1330 struct sigaction sigint_action
;
1331 struct sigaction sigquit_action
;
1333 struct sigaction sighup_action
;
1335 #else /* !POSIX_SIGNALS */
1337 SIGTYPE (*sigchld
)();
1339 #endif /* !POSIX_SIGNALS */
1340 /* Use volatile to protect variables from being clobbered by longjmp. */
1341 volatile int forkin
, forkout
;
1342 volatile int pty_flag
= 0;
1343 extern char **environ
;
1344 Lisp_Object buffer
= XPROCESS (process
)->buffer
;
1346 inchannel
= outchannel
= -1;
1349 if (!NILP (Vprocess_connection_type
))
1350 outchannel
= inchannel
= allocate_pty ();
1355 /* On USG systems it does not work to open the pty's tty here
1356 and then close and reopen it in the child. */
1358 /* Don't let this terminal become our controlling terminal
1359 (in case we don't have one). */
1360 forkout
= forkin
= open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1362 forkout
= forkin
= open (pty_name
, O_RDWR
, 0);
1365 report_file_error ("Opening pty", Qnil
);
1367 forkin
= forkout
= -1;
1368 #endif /* not USG */
1372 #endif /* HAVE_PTYS */
1375 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1376 report_file_error ("Opening socketpair", Qnil
);
1377 outchannel
= inchannel
= sv
[0];
1378 forkout
= forkin
= sv
[1];
1380 #else /* not SKTPAIR */
1389 #endif /* not SKTPAIR */
1392 /* Replaced by close_process_descs */
1393 set_exclusive_use (inchannel
);
1394 set_exclusive_use (outchannel
);
1397 /* Stride people say it's a mystery why this is needed
1398 as well as the O_NDELAY, but that it fails without this. */
1399 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1402 ioctl (inchannel
, FIONBIO
, &one
);
1407 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1408 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1411 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1412 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1416 /* Record this as an active process, with its channels.
1417 As a result, child_setup will close Emacs's side of the pipes. */
1418 chan_process
[inchannel
] = process
;
1419 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1420 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1421 /* Record the tty descriptor used in the subprocess. */
1423 XPROCESS (process
)->subtty
= Qnil
;
1425 XSETFASTINT (XPROCESS (process
)->subtty
, forkin
);
1426 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1427 XPROCESS (process
)->status
= Qrun
;
1428 if (!proc_decode_coding_system
[inchannel
])
1429 proc_decode_coding_system
[inchannel
]
1430 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
1431 setup_coding_system (XPROCESS (process
)->decode_coding_system
,
1432 proc_decode_coding_system
[inchannel
]);
1433 if (!proc_encode_coding_system
[outchannel
])
1434 proc_encode_coding_system
[outchannel
]
1435 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
1436 setup_coding_system (XPROCESS (process
)->encode_coding_system
,
1437 proc_encode_coding_system
[outchannel
]);
1439 if (!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
)
1440 || (NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
)))
1442 /* In unibyte mode, character code conversion should not take
1443 place but EOL conversion should. So, setup raw-text or one
1444 of the subsidiary according to the information just setup. */
1445 if (NILP (Vcoding_system_for_read
)
1446 && !NILP (XPROCESS (process
)->decode_coding_system
))
1447 setup_raw_text_coding_system (proc_decode_coding_system
[inchannel
]);
1448 if (NILP (Vcoding_system_for_write
)
1449 && !NILP (XPROCESS (process
)->encode_coding_system
))
1450 setup_raw_text_coding_system (proc_encode_coding_system
[outchannel
]);
1453 if (CODING_REQUIRE_ENCODING (proc_encode_coding_system
[outchannel
]))
1455 /* Here we encode arguments by the coding system used for
1456 sending data to the process. We don't support using
1457 different coding systems for encoding arguments and for
1458 encoding data sent to the process. */
1459 struct gcpro gcpro1
;
1461 struct coding_system
*coding
= proc_encode_coding_system
[outchannel
];
1463 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
1465 while (new_argv
[i
] != 0)
1467 int len
= strlen (new_argv
[i
]);
1468 int size
= encoding_buffer_size (coding
, len
);
1469 unsigned char *buf
= (unsigned char *) alloca (size
);
1471 encode_coding (coding
, (unsigned char *)new_argv
[i
], buf
, len
, size
);
1472 buf
[coding
->produced
] = 0;
1473 /* We don't have to free new_argv[i] because it points to a
1474 Lisp string given as an argument to `start-process'. */
1475 new_argv
[i
++] = (char *) buf
;
1478 coding
->mode
&= ~CODING_MODE_LAST_BLOCK
;
1481 /* Delay interrupts until we have a chance to store
1482 the new fork's pid in its process structure */
1483 #ifdef POSIX_SIGNALS
1484 sigemptyset (&blocked
);
1486 sigaddset (&blocked
, SIGCHLD
);
1489 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1490 this sets the parent's signal handlers as well as the child's.
1491 So delay all interrupts whose handlers the child might munge,
1492 and record the current handlers so they can be restored later. */
1493 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1494 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1496 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1498 #endif /* HAVE_VFORK */
1499 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1500 #else /* !POSIX_SIGNALS */
1504 #else /* not BSD4_1 */
1505 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1506 sigsetmask (sigmask (SIGCHLD
));
1507 #else /* ordinary USG */
1509 sigchld_deferred
= 0;
1510 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1512 #endif /* ordinary USG */
1513 #endif /* not BSD4_1 */
1514 #endif /* SIGCHLD */
1515 #endif /* !POSIX_SIGNALS */
1517 FD_SET (inchannel
, &input_wait_mask
);
1518 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1519 if (inchannel
> max_process_desc
)
1520 max_process_desc
= inchannel
;
1522 /* Until we store the proper pid, enable sigchld_handler
1523 to recognize an unknown pid as standing for this process.
1524 It is very important not to let this `marker' value stay
1525 in the table after this function has returned; if it does
1526 it might cause call-process to hang and subsequent asynchronous
1527 processes to get their return values scrambled. */
1528 XSETINT (XPROCESS (process
)->pid
, -1);
1533 /* child_setup must clobber environ on systems with true vfork.
1534 Protect it from permanent change. */
1535 char **save_environ
= environ
;
1537 current_dir
= ENCODE_FILE (current_dir
);
1542 #endif /* not WINDOWSNT */
1544 int xforkin
= forkin
;
1545 int xforkout
= forkout
;
1547 #if 0 /* This was probably a mistake--it duplicates code later on,
1548 but fails to handle all the cases. */
1549 /* Make sure SIGCHLD is not blocked in the child. */
1550 sigsetmask (SIGEMPTYMASK
);
1553 /* Make the pty be the controlling terminal of the process. */
1555 /* First, disconnect its current controlling terminal. */
1557 /* We tried doing setsid only if pty_flag, but it caused
1558 process_set_signal to fail on SGI when using a pipe. */
1560 /* Make the pty's terminal the controlling terminal. */
1564 /* We ignore the return value
1565 because faith@cs.unc.edu says that is necessary on Linux. */
1566 ioctl (xforkin
, TIOCSCTTY
, 0);
1569 #else /* not HAVE_SETSID */
1571 /* It's very important to call setpgrp here and no time
1572 afterwards. Otherwise, we lose our controlling tty which
1573 is set when we open the pty. */
1576 #endif /* not HAVE_SETSID */
1577 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1578 if (pty_flag
&& xforkin
>= 0)
1581 tcgetattr (xforkin
, &t
);
1583 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1584 write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1587 #if defined (NTTYDISC) && defined (TIOCSETD)
1588 if (pty_flag
&& xforkin
>= 0)
1590 /* Use new line discipline. */
1591 int ldisc
= NTTYDISC
;
1592 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1597 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1598 can do TIOCSPGRP only to the process's controlling tty. */
1601 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1602 I can't test it since I don't have 4.3. */
1603 int j
= open ("/dev/tty", O_RDWR
, 0);
1604 ioctl (j
, TIOCNOTTY
, 0);
1607 /* In order to get a controlling terminal on some versions
1608 of BSD, it is necessary to put the process in pgrp 0
1609 before it opens the terminal. */
1617 #endif /* TIOCNOTTY */
1619 #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY)
1620 /*** There is a suggestion that this ought to be a
1621 conditional on TIOCSPGRP,
1622 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1623 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1624 that system does seem to need this code, even though
1625 both HAVE_SETSID and TIOCSCTTY are defined. */
1626 /* Now close the pty (if we had it open) and reopen it.
1627 This makes the pty the controlling terminal of the subprocess. */
1630 #ifdef SET_CHILD_PTY_PGRP
1631 int pgrp
= getpid ();
1634 /* I wonder if close (open (pty_name, ...)) would work? */
1637 xforkout
= xforkin
= open (pty_name
, O_RDWR
, 0);
1641 write (1, "Couldn't open the pty terminal ", 31);
1642 write (1, pty_name
, strlen (pty_name
));
1647 #ifdef SET_CHILD_PTY_PGRP
1648 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1649 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1652 #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */
1654 #ifdef SETUP_SLAVE_PTY
1659 #endif /* SETUP_SLAVE_PTY */
1661 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1662 Now reenable it in the child, so it will die when we want it to. */
1664 signal (SIGHUP
, SIG_DFL
);
1666 #endif /* HAVE_PTYS */
1668 signal (SIGINT
, SIG_DFL
);
1669 signal (SIGQUIT
, SIG_DFL
);
1671 /* Stop blocking signals in the child. */
1672 #ifdef POSIX_SIGNALS
1673 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1674 #else /* !POSIX_SIGNALS */
1678 #else /* not BSD4_1 */
1679 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1680 sigsetmask (SIGEMPTYMASK
);
1681 #else /* ordinary USG */
1683 signal (SIGCHLD
, sigchld
);
1685 #endif /* ordinary USG */
1686 #endif /* not BSD4_1 */
1687 #endif /* SIGCHLD */
1688 #endif /* !POSIX_SIGNALS */
1691 child_setup_tty (xforkout
);
1693 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1694 new_argv
, 1, current_dir
);
1695 #else /* not WINDOWSNT */
1696 child_setup (xforkin
, xforkout
, xforkout
,
1697 new_argv
, 1, current_dir
);
1698 #endif /* not WINDOWSNT */
1700 environ
= save_environ
;
1705 /* This runs in the Emacs process. */
1710 if (forkin
!= forkout
&& forkout
>= 0)
1715 /* vfork succeeded. */
1716 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
1719 register_child (pid
, inchannel
);
1720 #endif /* WINDOWSNT */
1722 /* If the subfork execv fails, and it exits,
1723 this close hangs. I don't know why.
1724 So have an interrupt jar it loose. */
1726 signal (SIGALRM
, create_process_1
);
1728 XPROCESS (process
)->subtty
= Qnil
;
1733 if (forkin
!= forkout
&& forkout
>= 0)
1738 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1741 XPROCESS (process
)->tty_name
= Qnil
;
1744 /* Restore the signal state whether vfork succeeded or not.
1745 (We will signal an error, below, if it failed.) */
1746 #ifdef POSIX_SIGNALS
1748 /* Restore the parent's signal handlers. */
1749 sigaction (SIGINT
, &sigint_action
, 0);
1750 sigaction (SIGQUIT
, &sigquit_action
, 0);
1752 sigaction (SIGHUP
, &sighup_action
, 0);
1754 #endif /* HAVE_VFORK */
1755 /* Stop blocking signals in the parent. */
1756 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1757 #else /* !POSIX_SIGNALS */
1761 #else /* not BSD4_1 */
1762 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1763 sigsetmask (SIGEMPTYMASK
);
1764 #else /* ordinary USG */
1766 signal (SIGCHLD
, sigchld
);
1767 /* Now really handle any of these signals
1768 that came in during this function. */
1769 if (sigchld_deferred
)
1770 kill (getpid (), SIGCHLD
);
1772 #endif /* ordinary USG */
1773 #endif /* not BSD4_1 */
1774 #endif /* SIGCHLD */
1775 #endif /* !POSIX_SIGNALS */
1777 /* Now generate the error if vfork failed. */
1779 report_file_error ("Doing vfork", Qnil
);
1781 #endif /* not VMS */
1785 /* open a TCP network connection to a given HOST/SERVICE. Treated
1786 exactly like a normal process when reading and writing. Only
1787 differences are in status display and process deletion. A network
1788 connection has no PID; you cannot signal it. All you can do is
1789 deactivate and close it via delete-process */
1791 DEFUN ("open-network-stream", Fopen_network_stream
, Sopen_network_stream
,
1793 "Open a TCP connection for a service to a host.\n\
1794 Returns a subprocess-object to represent the connection.\n\
1795 Input and output work as for subprocesses; `delete-process' closes it.\n\
1796 Args are NAME BUFFER HOST SERVICE.\n\
1797 NAME is name for process. It is modified if necessary to make it unique.\n\
1798 BUFFER is the buffer (or buffer-name) to associate with the process.\n\
1799 Process output goes at end of that buffer, unless you specify\n\
1800 an output stream or filter function to handle the output.\n\
1801 BUFFER may be also nil, meaning that this process is not associated\n\
1803 Third arg is name of the host to connect to, or its IP address.\n\
1804 Fourth arg SERVICE is name of the service desired, or an integer\n\
1805 specifying a port number to connect to.")
1806 (name
, buffer
, host
, service
)
1807 Lisp_Object name
, buffer
, host
, service
;
1811 struct sockaddr_in address
;
1812 struct servent
*svc_info
;
1813 struct hostent
*host_info_ptr
, host_info
;
1814 char *(addr_list
[2]);
1815 IN_ADDR numeric_addr
;
1819 struct hostent host_info_fixed
;
1820 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1822 int count
= specpdl_ptr
- specpdl
;
1825 /* Ensure socket support is loaded if available. */
1826 init_winsock (TRUE
);
1829 GCPRO4 (name
, buffer
, host
, service
);
1830 CHECK_STRING (name
, 0);
1831 CHECK_STRING (host
, 0);
1832 if (INTEGERP (service
))
1833 port
= htons ((unsigned short) XINT (service
));
1836 CHECK_STRING (service
, 0);
1837 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
1839 error ("Unknown service \"%s\"", XSTRING (service
)->data
);
1840 port
= svc_info
->s_port
;
1843 /* Slow down polling to every ten seconds.
1844 Some kernels have a bug which causes retrying connect to fail
1845 after a connect. Polling can interfere with gethostbyname too. */
1846 #ifdef POLL_FOR_INPUT
1847 bind_polling_period (10);
1858 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
1861 if (! (host_info_ptr
== 0 && h_errno
== TRY_AGAIN
))
1864 Fsleep_for (make_number (1), Qnil
);
1866 if (host_info_ptr
== 0)
1867 /* Attempt to interpret host as numeric inet address */
1869 numeric_addr
= inet_addr ((char *) XSTRING (host
)->data
);
1870 if (NUMERIC_ADDR_ERROR
)
1871 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
1873 host_info_ptr
= &host_info
;
1874 host_info
.h_name
= 0;
1875 host_info
.h_aliases
= 0;
1876 host_info
.h_addrtype
= AF_INET
;
1878 /* Older machines have only one address slot called h_addr.
1879 Newer machines have h_addr_list, but #define h_addr to
1880 be its first element. */
1881 host_info
.h_addr_list
= &(addr_list
[0]);
1883 host_info
.h_addr
= (char*)(&numeric_addr
);
1885 /* numeric_addr isn't null-terminated; it has fixed length. */
1886 host_info
.h_length
= sizeof (numeric_addr
);
1889 bzero (&address
, sizeof address
);
1890 bcopy (host_info_ptr
->h_addr
, (char *) &address
.sin_addr
,
1891 host_info_ptr
->h_length
);
1892 address
.sin_family
= host_info_ptr
->h_addrtype
;
1893 address
.sin_port
= port
;
1895 s
= socket (host_info_ptr
->h_addrtype
, SOCK_STREAM
, 0);
1897 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1899 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
1900 when connect is interrupted. So let's not let it get interrupted.
1901 Note we do not turn off polling, because polling is only used
1902 when not interrupt_input, and thus not normally used on the systems
1903 which have this bug. On systems which use polling, there's no way
1904 to quit if polling is turned off. */
1905 if (interrupt_input
)
1913 if (connect (s
, (struct sockaddr
*) &address
, sizeof address
) == -1
1914 && errno
!= EISCONN
)
1922 if (errno
== EADDRINUSE
&& retry
< 20)
1924 /* A delay here is needed on some FreeBSD systems,
1925 and it is harmless, since this retrying takes time anyway
1926 and should be infrequent. */
1927 Fsleep_for (make_number (1), Qnil
);
1934 if (interrupt_input
)
1938 report_file_error ("connection failed",
1939 Fcons (host
, Fcons (name
, Qnil
)));
1944 #ifdef POLL_FOR_INPUT
1945 unbind_to (count
, Qnil
);
1948 if (interrupt_input
)
1952 s
= connect_server (0);
1954 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1955 send_command (s
, C_PORT
, 0, "%s:%d", XSTRING (host
)->data
, ntohs (port
));
1956 send_command (s
, C_DUMB
, 1, 0);
1963 buffer
= Fget_buffer_create (buffer
);
1964 proc
= make_process (name
);
1966 chan_process
[inch
] = proc
;
1969 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
1972 fcntl (inch
, F_SETFL
, O_NDELAY
);
1976 XPROCESS (proc
)->childp
= Fcons (host
, Fcons (service
, Qnil
));
1977 XPROCESS (proc
)->command_channel_p
= Qnil
;
1978 XPROCESS (proc
)->buffer
= buffer
;
1979 XPROCESS (proc
)->sentinel
= Qnil
;
1980 XPROCESS (proc
)->filter
= Qnil
;
1981 XPROCESS (proc
)->command
= Qnil
;
1982 XPROCESS (proc
)->pid
= Qnil
;
1983 XSETINT (XPROCESS (proc
)->infd
, inch
);
1984 XSETINT (XPROCESS (proc
)->outfd
, outch
);
1985 XPROCESS (proc
)->status
= Qrun
;
1986 FD_SET (inch
, &input_wait_mask
);
1987 FD_SET (inch
, &non_keyboard_wait_mask
);
1988 if (inch
> max_process_desc
)
1989 max_process_desc
= inch
;
1992 /* Setup coding systems for communicating with the network stream. */
1993 struct gcpro gcpro1
;
1994 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1995 Lisp_Object coding_systems
= Qt
;
1996 Lisp_Object args
[5], val
;
1998 if (!NILP (Vcoding_system_for_read
))
1999 val
= Vcoding_system_for_read
;
2000 else if (!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
)
2001 || NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
))
2002 /* We dare not decode end-of-line format by setting VAL to
2003 Qraw_text, because the existing Emacs Lisp libraries
2004 assume that they receive bare code including a sequene of
2009 args
[0] = Qopen_network_stream
, args
[1] = name
,
2010 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
2012 coding_systems
= Ffind_operation_coding_system (5, args
);
2014 if (CONSP (coding_systems
))
2015 val
= XCONS (coding_systems
)->car
;
2016 else if (CONSP (Vdefault_process_coding_system
))
2017 val
= XCONS (Vdefault_process_coding_system
)->car
;
2021 XPROCESS (proc
)->decode_coding_system
= val
;
2023 if (!NILP (Vcoding_system_for_write
))
2024 val
= Vcoding_system_for_write
;
2025 else if (NILP (current_buffer
->enable_multibyte_characters
))
2029 if (EQ (coding_systems
, Qt
))
2031 args
[0] = Qopen_network_stream
, args
[1] = name
,
2032 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
2034 coding_systems
= Ffind_operation_coding_system (5, args
);
2037 if (CONSP (coding_systems
))
2038 val
= XCONS (coding_systems
)->cdr
;
2039 else if (CONSP (Vdefault_process_coding_system
))
2040 val
= XCONS (Vdefault_process_coding_system
)->cdr
;
2044 XPROCESS (proc
)->encode_coding_system
= val
;
2047 if (!proc_decode_coding_system
[inch
])
2048 proc_decode_coding_system
[inch
]
2049 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
2050 setup_coding_system (XPROCESS (proc
)->decode_coding_system
,
2051 proc_decode_coding_system
[inch
]);
2052 if (!proc_encode_coding_system
[outch
])
2053 proc_encode_coding_system
[outch
]
2054 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
2055 setup_coding_system (XPROCESS (proc
)->encode_coding_system
,
2056 proc_encode_coding_system
[outch
]);
2058 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
2059 XPROCESS (proc
)->decoding_carryover
= make_number (0);
2060 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
2061 XPROCESS (proc
)->encoding_carryover
= make_number (0);
2063 XPROCESS (proc
)->inherit_coding_system_flag
2064 = (NILP (buffer
) || !inherit_process_coding_system
2070 #endif /* HAVE_SOCKETS */
2073 deactivate_process (proc
)
2076 register int inchannel
, outchannel
;
2077 register struct Lisp_Process
*p
= XPROCESS (proc
);
2079 inchannel
= XINT (p
->infd
);
2080 outchannel
= XINT (p
->outfd
);
2084 /* Beware SIGCHLD hereabouts. */
2085 flush_pending_output (inchannel
);
2088 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
2089 sys$
dassgn (outchannel
);
2090 vs
= get_vms_process_pointer (p
->pid
);
2092 give_back_vms_process_stuff (vs
);
2096 if (outchannel
>= 0 && outchannel
!= inchannel
)
2100 XSETINT (p
->infd
, -1);
2101 XSETINT (p
->outfd
, -1);
2102 chan_process
[inchannel
] = Qnil
;
2103 FD_CLR (inchannel
, &input_wait_mask
);
2104 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
2105 if (inchannel
== max_process_desc
)
2108 /* We just closed the highest-numbered process input descriptor,
2109 so recompute the highest-numbered one now. */
2110 max_process_desc
= 0;
2111 for (i
= 0; i
< MAXDESC
; i
++)
2112 if (!NILP (chan_process
[i
]))
2113 max_process_desc
= i
;
2118 /* Close all descriptors currently in use for communication
2119 with subprocess. This is used in a newly-forked subprocess
2120 to get rid of irrelevant descriptors. */
2123 close_process_descs ()
2127 for (i
= 0; i
< MAXDESC
; i
++)
2129 Lisp_Object process
;
2130 process
= chan_process
[i
];
2131 if (!NILP (process
))
2133 int in
= XINT (XPROCESS (process
)->infd
);
2134 int out
= XINT (XPROCESS (process
)->outfd
);
2137 if (out
>= 0 && in
!= out
)
2144 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
2146 "Allow any pending output from subprocesses to be read by Emacs.\n\
2147 It is read into the process' buffers or given to their filter functions.\n\
2148 Non-nil arg PROCESS means do not return until some output has been received\n\
2150 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
2151 seconds and microseconds to wait; return after that much time whether\n\
2152 or not there is input.\n\
2153 Return non-nil iff we received any output before the timeout expired.")
2154 (process
, timeout
, timeout_msecs
)
2155 register Lisp_Object process
, timeout
, timeout_msecs
;
2160 if (! NILP (timeout_msecs
))
2162 CHECK_NUMBER (timeout_msecs
, 2);
2163 useconds
= XINT (timeout_msecs
);
2164 if (!INTEGERP (timeout
))
2165 XSETINT (timeout
, 0);
2168 int carry
= useconds
/ 1000000;
2170 XSETINT (timeout
, XINT (timeout
) + carry
);
2171 useconds
-= carry
* 1000000;
2173 /* I think this clause is necessary because C doesn't
2174 guarantee a particular rounding direction for negative
2178 XSETINT (timeout
, XINT (timeout
) - 1);
2179 useconds
+= 1000000;
2186 if (! NILP (timeout
))
2188 CHECK_NUMBER (timeout
, 1);
2189 seconds
= XINT (timeout
);
2190 if (seconds
< 0 || (seconds
== 0 && useconds
== 0))
2202 XSETFASTINT (process
, 0);
2205 (wait_reading_process_input (seconds
, useconds
, process
, 0)
2209 /* This variable is different from waiting_for_input in keyboard.c.
2210 It is used to communicate to a lisp process-filter/sentinel (via the
2211 function Fwaiting_for_user_input_p below) whether emacs was waiting
2212 for user-input when that process-filter was called.
2213 waiting_for_input cannot be used as that is by definition 0 when
2214 lisp code is being evalled.
2215 This is also used in record_asynch_buffer_change.
2216 For that purpose, this must be 0
2217 when not inside wait_reading_process_input. */
2218 static int waiting_for_user_input_p
;
2220 /* This is here so breakpoints can be put on it. */
2222 wait_reading_process_input_1 ()
2226 /* Read and dispose of subprocess output while waiting for timeout to
2227 elapse and/or keyboard input to be available.
2230 timeout in seconds, or
2231 zero for no limit, or
2232 -1 means gobble data immediately available but don't wait for any.
2235 an additional duration to wait, measured in microseconds.
2236 If this is nonzero and time_limit is 0, then the timeout
2237 consists of MICROSECS only.
2239 READ_KBD is a lisp value:
2240 0 to ignore keyboard input, or
2241 1 to return when input is available, or
2242 -1 meaning caller will actually read the input, so don't throw to
2243 the quit handler, or
2244 a cons cell, meaning wait until its car is non-nil
2245 (and gobble terminal input into the buffer if any arrives), or
2246 a process object, meaning wait until something arrives from that
2247 process. The return value is true iff we read some input from
2250 DO_DISPLAY != 0 means redisplay should be done to show subprocess
2251 output that arrives.
2253 If READ_KBD is a pointer to a struct Lisp_Process, then the
2254 function returns true iff we received input from that process
2255 before the timeout elapsed.
2256 Otherwise, return true iff we received input from any process. */
2259 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
2260 int time_limit
, microsecs
;
2261 Lisp_Object read_kbd
;
2264 register int channel
, nfds
, m
;
2265 static SELECT_TYPE Available
;
2268 EMACS_TIME timeout
, end_time
, garbage
;
2270 int wait_channel
= -1;
2271 struct Lisp_Process
*wait_proc
= 0;
2272 int got_some_input
= 0;
2273 Lisp_Object
*wait_for_cell
= 0;
2275 FD_ZERO (&Available
);
2277 /* If read_kbd is a process to watch, set wait_proc and wait_channel
2279 if (PROCESSP (read_kbd
))
2281 wait_proc
= XPROCESS (read_kbd
);
2282 wait_channel
= XINT (wait_proc
->infd
);
2283 XSETFASTINT (read_kbd
, 0);
2286 /* If waiting for non-nil in a cell, record where. */
2287 if (CONSP (read_kbd
))
2289 wait_for_cell
= &XCONS (read_kbd
)->car
;
2290 XSETFASTINT (read_kbd
, 0);
2293 waiting_for_user_input_p
= XINT (read_kbd
);
2295 /* Since we may need to wait several times,
2296 compute the absolute time to return at. */
2297 if (time_limit
|| microsecs
)
2299 EMACS_GET_TIME (end_time
);
2300 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
2301 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
2304 /* AlainF 5-Jul-1996
2305 HP-UX 10.10 seem to have problems with signals coming in
2306 Causes "poll: interrupted system call" messages when Emacs is run
2308 Turn off periodic alarms (in case they are in use) */
2314 int timeout_reduced_for_timers
= 0;
2316 /* If calling from keyboard input, do not quit
2317 since we want to return C-g as an input character.
2318 Otherwise, do pending quit if requested. */
2319 if (XINT (read_kbd
) >= 0)
2322 /* Exit now if the cell we're waiting for became non-nil. */
2323 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2326 /* Compute time from now till when time limit is up */
2327 /* Exit if already run out */
2328 if (time_limit
== -1)
2330 /* -1 specified for timeout means
2331 gobble output available now
2332 but don't wait at all. */
2334 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2336 else if (time_limit
|| microsecs
)
2338 EMACS_GET_TIME (timeout
);
2339 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
2340 if (EMACS_TIME_NEG_P (timeout
))
2345 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
2348 /* Normally we run timers here.
2349 But not if wait_for_cell; in those cases,
2350 the wait is supposed to be short,
2351 and those callers cannot handle running arbitrary Lisp code here. */
2352 if (! wait_for_cell
)
2354 EMACS_TIME timer_delay
;
2358 old_timers_run
= timers_run
;
2359 timer_delay
= timer_check (1);
2360 if (timers_run
!= old_timers_run
&& do_display
)
2362 redisplay_preserve_echo_area ();
2363 /* We must retry, since a timer may have requeued itself
2364 and that could alter the time_delay. */
2368 /* If there is unread keyboard input, also return. */
2369 if (XINT (read_kbd
) != 0
2370 && requeued_events_pending_p ())
2373 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
2375 EMACS_TIME difference
;
2376 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
2377 if (EMACS_TIME_NEG_P (difference
))
2379 timeout
= timer_delay
;
2380 timeout_reduced_for_timers
= 1;
2383 /* If time_limit is -1, we are not going to wait at all. */
2384 else if (time_limit
!= -1)
2386 /* This is so a breakpoint can be put here. */
2387 wait_reading_process_input_1 ();
2391 /* Cause C-g and alarm signals to take immediate action,
2392 and cause input available signals to zero out timeout.
2394 It is important that we do this before checking for process
2395 activity. If we get a SIGCHLD after the explicit checks for
2396 process activity, timeout is the only way we will know. */
2397 if (XINT (read_kbd
) < 0)
2398 set_waiting_for_input (&timeout
);
2400 /* If status of something has changed, and no input is
2401 available, notify the user of the change right away. After
2402 this explicit check, we'll let the SIGCHLD handler zap
2403 timeout to get our attention. */
2404 if (update_tick
!= process_tick
&& do_display
)
2406 Atemp
= input_wait_mask
;
2407 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2408 if ((select (max (max_process_desc
, max_keyboard_desc
) + 1,
2409 &Atemp
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2413 /* It's okay for us to do this and then continue with
2414 the loop, since timeout has already been zeroed out. */
2415 clear_waiting_for_input ();
2420 /* Don't wait for output from a non-running process. */
2421 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
2422 update_status (wait_proc
);
2424 && ! EQ (wait_proc
->status
, Qrun
))
2426 int nread
, total_nread
= 0;
2428 clear_waiting_for_input ();
2429 XSETPROCESS (proc
, wait_proc
);
2431 /* Read data from the process, until we exhaust it. */
2432 while (XINT (wait_proc
->infd
) >= 0
2434 = read_process_output (proc
, XINT (wait_proc
->infd
))))
2437 total_nread
+= nread
;
2439 else if (nread
== -1 && EIO
== errno
)
2443 if (total_nread
> 0 && do_display
)
2444 redisplay_preserve_echo_area ();
2449 /* Wait till there is something to do */
2452 Available
= non_process_wait_mask
;
2453 else if (! XINT (read_kbd
))
2454 Available
= non_keyboard_wait_mask
;
2456 Available
= input_wait_mask
;
2458 /* If frame size has changed or the window is newly mapped,
2459 redisplay now, before we start to wait. There is a race
2460 condition here; if a SIGIO arrives between now and the select
2461 and indicates that a frame is trashed, the select may block
2462 displaying a trashed screen. */
2463 if (frame_garbaged
&& do_display
)
2465 clear_waiting_for_input ();
2466 redisplay_preserve_echo_area ();
2467 if (XINT (read_kbd
) < 0)
2468 set_waiting_for_input (&timeout
);
2471 if (XINT (read_kbd
) && detect_input_pending ())
2474 FD_ZERO (&Available
);
2477 nfds
= select (max (max_process_desc
, max_keyboard_desc
) + 1,
2478 &Available
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2483 /* Make C-g and alarm signals set flags again */
2484 clear_waiting_for_input ();
2486 /* If we woke up due to SIGWINCH, actually change size now. */
2487 do_pending_window_change ();
2489 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
2490 /* We wanted the full specified time, so return now. */
2494 if (xerrno
== EINTR
)
2495 FD_ZERO (&Available
);
2497 /* Ultrix select seems to return ENOMEM when it is
2498 interrupted. Treat it just like EINTR. Bleah. Note
2499 that we want to test for the "ultrix" CPP symbol, not
2500 "__ultrix__"; the latter is only defined under GCC, but
2501 not by DEC's bundled CC. -JimB */
2502 else if (xerrno
== ENOMEM
)
2503 FD_ZERO (&Available
);
2506 /* This happens for no known reason on ALLIANT.
2507 I am guessing that this is the right response. -- RMS. */
2508 else if (xerrno
== EFAULT
)
2509 FD_ZERO (&Available
);
2511 else if (xerrno
== EBADF
)
2514 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
2515 the child's closure of the pts gives the parent a SIGHUP, and
2516 the ptc file descriptor is automatically closed,
2517 yielding EBADF here or at select() call above.
2518 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
2519 in m/ibmrt-aix.h), and here we just ignore the select error.
2520 Cleanup occurs c/o status_notify after SIGCLD. */
2521 FD_ZERO (&Available
); /* Cannot depend on values returned */
2527 error ("select error: %s", strerror (xerrno
));
2529 #if defined(sun) && !defined(USG5_4)
2530 else if (nfds
> 0 && keyboard_bit_set (&Available
)
2532 /* System sometimes fails to deliver SIGIO.
2534 David J. Mackenzie says that Emacs doesn't compile under
2535 Solaris if this code is enabled, thus the USG5_4 in the CPP
2536 conditional. "I haven't noticed any ill effects so far.
2537 If you find a Solaris expert somewhere, they might know
2539 kill (getpid (), SIGIO
);
2542 #if 0 /* When polling is used, interrupt_input is 0,
2543 so get_input_pending should read the input.
2544 So this should not be needed. */
2545 /* If we are using polling for input,
2546 and we see input available, make it get read now.
2547 Otherwise it might not actually get read for a second.
2548 And on hpux, since we turn off polling in wait_reading_process_input,
2549 it might never get read at all if we don't spend much time
2550 outside of wait_reading_process_input. */
2551 if (XINT (read_kbd
) && interrupt_input
2552 && keyboard_bit_set (&Available
)
2553 && input_polling_used ())
2554 kill (getpid (), SIGALRM
);
2557 /* Check for keyboard input */
2558 /* If there is any, return immediately
2559 to give it higher priority than subprocesses */
2561 if (XINT (read_kbd
) != 0
2562 && detect_input_pending_run_timers (do_display
))
2564 swallow_events (do_display
);
2565 if (detect_input_pending_run_timers (do_display
))
2569 /* If there is unread keyboard input, also return. */
2570 if (XINT (read_kbd
) != 0
2571 && requeued_events_pending_p ())
2574 /* If we are not checking for keyboard input now,
2575 do process events (but don't run any timers).
2576 This is so that X events will be processed.
2577 Otherwise they may have to wait until polling takes place.
2578 That would causes delays in pasting selections, for example.
2580 (We used to do this only if wait_for_cell.) */
2581 if (XINT (read_kbd
) == 0 && detect_input_pending ())
2583 swallow_events (do_display
);
2584 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
2585 if (detect_input_pending ())
2590 /* Exit now if the cell we're waiting for became non-nil. */
2591 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2595 /* If we think we have keyboard input waiting, but didn't get SIGIO,
2596 go read it. This can happen with X on BSD after logging out.
2597 In that case, there really is no input and no SIGIO,
2598 but select says there is input. */
2600 if (XINT (read_kbd
) && interrupt_input
2601 && keyboard_bit_set (&Available
))
2602 kill (getpid (), SIGIO
);
2606 got_some_input
|= nfds
> 0;
2608 /* If checking input just got us a size-change event from X,
2609 obey it now if we should. */
2610 if (XINT (read_kbd
) || wait_for_cell
)
2611 do_pending_window_change ();
2613 /* Check for data from a process. */
2614 /* Really FIRST_PROC_DESC should be 0 on Unix,
2615 but this is safer in the short run. */
2616 for (channel
= 0; channel
<= max_process_desc
; channel
++)
2618 if (FD_ISSET (channel
, &Available
)
2619 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
2623 /* If waiting for this channel, arrange to return as
2624 soon as no more input to be processed. No more
2626 if (wait_channel
== channel
)
2632 proc
= chan_process
[channel
];
2636 /* Read data from the process, starting with our
2637 buffered-ahead character if we have one. */
2639 nread
= read_process_output (proc
, channel
);
2642 /* Since read_process_output can run a filter,
2643 which can call accept-process-output,
2644 don't try to read from any other processes
2645 before doing the select again. */
2646 FD_ZERO (&Available
);
2649 redisplay_preserve_echo_area ();
2652 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2655 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
2656 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
2658 else if (nread
== -1 && errno
== EAGAIN
)
2662 else if (nread
== -1 && errno
== EAGAIN
)
2664 /* Note that we cannot distinguish between no input
2665 available now and a closed pipe.
2666 With luck, a closed pipe will be accompanied by
2667 subprocess termination and SIGCHLD. */
2668 else if (nread
== 0 && !NETCONN_P (proc
))
2670 #endif /* O_NDELAY */
2671 #endif /* O_NONBLOCK */
2673 /* On some OSs with ptys, when the process on one end of
2674 a pty exits, the other end gets an error reading with
2675 errno = EIO instead of getting an EOF (0 bytes read).
2676 Therefore, if we get an error reading and errno =
2677 EIO, just continue, because the child process has
2678 exited and should clean itself up soon (e.g. when we
2681 However, it has been known to happen that the SIGCHLD
2682 got lost. So raise the signl again just in case.
2684 else if (nread
== -1 && errno
== EIO
)
2685 kill (getpid (), SIGCHLD
);
2686 #endif /* HAVE_PTYS */
2687 /* If we can detect process termination, don't consider the process
2688 gone just because its pipe is closed. */
2690 else if (nread
== 0 && !NETCONN_P (proc
))
2695 /* Preserve status of processes already terminated. */
2696 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2697 deactivate_process (proc
);
2698 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2699 update_status (XPROCESS (proc
));
2700 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2701 XPROCESS (proc
)->status
2702 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2705 } /* end for each file descriptor */
2706 } /* end while exit conditions not met */
2708 waiting_for_user_input_p
= 0;
2710 /* If calling from keyboard input, do not quit
2711 since we want to return C-g as an input character.
2712 Otherwise, do pending quit if requested. */
2713 if (XINT (read_kbd
) >= 0)
2715 /* Prevent input_pending from remaining set if we quit. */
2716 clear_input_pending ();
2720 /* AlainF 5-Jul-1996
2721 HP-UX 10.10 seems to have problems with signals coming in
2722 Causes "poll: interrupted system call" messages when Emacs is run
2724 Turn periodic alarms back on */
2728 return got_some_input
;
2731 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
2734 read_process_output_call (fun_and_args
)
2735 Lisp_Object fun_and_args
;
2737 return apply1 (XCONS (fun_and_args
)->car
, XCONS (fun_and_args
)->cdr
);
2741 read_process_output_error_handler (error
)
2744 cmd_error_internal (error
, "error in process filter: ");
2746 update_echo_area ();
2747 Fsleep_for (make_number (2), Qnil
);
2750 /* Read pending output from the process channel,
2751 starting with our buffered-ahead character if we have one.
2752 Yield number of decoded characters read.
2754 This function reads at most 1024 characters.
2755 If you want to read all available subprocess output,
2756 you must call it repeatedly until it returns zero.
2758 The characters read are decoded according to PROC's coding-system
2762 read_process_output (proc
, channel
)
2764 register int channel
;
2766 register int nchars
, nbytes
;
2769 int chars_allocated
= 0; /* If 1, `chars' should be freed later. */
2773 register Lisp_Object outstream
;
2774 register struct buffer
*old
= current_buffer
;
2775 register struct Lisp_Process
*p
= XPROCESS (proc
);
2776 register int opoint
;
2777 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
2778 int chars_in_decoding_buf
= 0; /* If 1, `chars' points
2779 XSTRING (p->decoding_buf)->data. */
2780 int carryover
= XINT (p
->decoding_carryover
);
2783 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2785 vs
= get_vms_process_pointer (p
->pid
);
2789 return(0); /* Really weird if it does this */
2790 if (!(vs
->iosb
[0] & 1))
2791 return -1; /* I/O error */
2794 error ("Could not get VMS process pointer");
2795 chars
= vs
->inputBuffer
;
2796 nbytes
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2799 start_vms_process_read (vs
); /* Crank up the next read on the process */
2800 return 1; /* Nothing worth printing, say we got 1 */
2804 /* The data carried over in the previous decoding (which are at
2805 the tail of decoding buffer) should be prepended to the new
2806 data read to decode all together. */
2807 char *buf
= (char *) xmalloc (nbytes
+ carryover
);
2809 bcopy (XSTRING (p
->decoding_buf
)->data
2810 + STRING_BYTES (XSTRING (p
->decoding_buf
)) - carryover
,
2812 bcopy (chars
, buf
+ carryover
, nbytes
);
2814 chars_allocated
= 1;
2819 /* See the comment above. */
2820 bcopy (XSTRING (p
->decoding_buf
)->data
2821 + STRING_BYTES (XSTRING (p
->decoding_buf
)) - carryover
,
2824 if (proc_buffered_char
[channel
] < 0)
2825 nbytes
= read (channel
, buf
+ carryover
, (sizeof buf
) - carryover
);
2828 buf
[carryover
] = proc_buffered_char
[channel
];
2829 proc_buffered_char
[channel
] = -1;
2830 nbytes
= read (channel
, buf
+ carryover
+ 1,
2831 (sizeof buf
) - carryover
- 1);
2835 nbytes
= nbytes
+ 1;
2838 #endif /* not VMS */
2840 XSETINT (p
->decoding_carryover
, 0);
2842 /* At this point, NBYTES holds number of characters just received
2843 (including the one in proc_buffered_char[channel]). */
2844 if (nbytes
<= 0) return nbytes
;
2846 /* Now set NBYTES how many bytes we must decode. */
2847 nbytes
+= carryover
;
2850 if (CODING_MAY_REQUIRE_DECODING (coding
))
2852 int require
= decoding_buffer_size (coding
, nbytes
);
2855 if (STRING_BYTES (XSTRING (p
->decoding_buf
)) < require
)
2856 p
->decoding_buf
= make_uninit_string (require
);
2857 result
= decode_coding (coding
, chars
, XSTRING (p
->decoding_buf
)->data
,
2858 nbytes
, STRING_BYTES (XSTRING (p
->decoding_buf
)));
2859 carryover
= nbytes
- coding
->consumed
;
2862 /* Copy the carryover bytes to the end of p->decoding_buf, to
2863 be processed on the next read. Since decoding_buffer_size
2864 asks for an extra amount of space beyond the maximum
2865 expected for the output, there should always be sufficient
2866 space for the carryover (which is by definition a sequence
2867 of bytes that was not long enough to be decoded, and thus
2868 has a bounded length). */
2869 if (STRING_BYTES (XSTRING (p
->decoding_buf
))
2870 < coding
->produced
+ carryover
)
2872 bcopy (chars
+ coding
->consumed
,
2873 XSTRING (p
->decoding_buf
)->data
2874 + STRING_BYTES (XSTRING (p
->decoding_buf
)) - carryover
,
2876 XSETINT (p
->decoding_carryover
, carryover
);
2879 /* A new coding system might be found by `decode_coding'. */
2880 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
2882 p
->decode_coding_system
= coding
->symbol
;
2884 /* Don't call setup_coding_system for
2885 proc_decode_coding_system[channel] here. It is done in
2886 detect_coding called via decode_coding above. */
2888 /* If a coding system for encoding is not yet decided, we set
2889 it as the same as coding-system for decoding.
2891 But, before doing that we must check if
2892 proc_encode_coding_system[p->outfd] surely points to a
2893 valid memory because p->outfd will be changed once EOF is
2894 sent to the process. */
2895 if (NILP (p
->encode_coding_system
)
2896 && proc_encode_coding_system
[XINT (p
->outfd
)])
2898 p
->encode_coding_system
= coding
->symbol
;
2899 setup_coding_system (coding
->symbol
,
2900 proc_encode_coding_system
[XINT (p
->outfd
)]);
2905 /* Now we don't need the contents of `chars'. */
2906 if (chars_allocated
)
2909 if (coding
->produced
== 0)
2911 chars
= (char *) XSTRING (p
->decoding_buf
)->data
;
2912 nbytes
= coding
->produced
;
2913 nchars
= (coding
->fake_multibyte
2914 ? multibyte_chars_in_text (chars
, nbytes
)
2915 : coding
->produced_char
);
2916 chars_in_decoding_buf
= 1;
2921 if (chars_allocated
)
2923 /* Although we don't have to decode the received data, we
2924 must move it to an area which we don't have to free. */
2925 if (! STRINGP (p
->decoding_buf
)
2926 || STRING_BYTES (XSTRING (p
->decoding_buf
)) < nbytes
)
2927 p
->decoding_buf
= make_uninit_string (nbytes
);
2928 bcopy (chars
, XSTRING (p
->decoding_buf
)->data
, nbytes
);
2930 chars
= XSTRING (p
->decoding_buf
)->data
;
2931 chars_in_decoding_buf
= 1;
2934 nchars
= multibyte_chars_in_text (chars
, nbytes
);
2937 Vlast_coding_system_used
= coding
->symbol
;
2939 /* If the caller required, let the process associated buffer
2940 inherit the coding-system used to decode the process output. */
2941 if (! NILP (p
->inherit_coding_system_flag
)
2942 && !NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2944 struct buffer
*prev_buf
= current_buffer
;
2946 Fset_buffer (p
->buffer
);
2947 call1 (intern ("after-insert-file-set-buffer-file-coding-system"),
2948 make_number (nbytes
));
2949 set_buffer_internal (prev_buf
);
2952 /* Read and dispose of the process output. */
2953 outstream
= p
->filter
;
2954 if (!NILP (outstream
))
2956 /* We inhibit quit here instead of just catching it so that
2957 hitting ^G when a filter happens to be running won't screw
2959 int count
= specpdl_ptr
- specpdl
;
2960 Lisp_Object odeactivate
;
2961 Lisp_Object obuffer
, okeymap
;
2963 int outer_running_asynch_code
= running_asynch_code
;
2964 int waiting
= waiting_for_user_input_p
;
2966 /* No need to gcpro these, because all we do with them later
2967 is test them for EQness, and none of them should be a string. */
2968 odeactivate
= Vdeactivate_mark
;
2969 XSETBUFFER (obuffer
, current_buffer
);
2970 okeymap
= current_buffer
->keymap
;
2972 specbind (Qinhibit_quit
, Qt
);
2973 specbind (Qlast_nonmenu_event
, Qt
);
2975 /* In case we get recursively called,
2976 and we already saved the match data nonrecursively,
2977 save the same match data in safely recursive fashion. */
2978 if (outer_running_asynch_code
)
2981 /* Don't clobber the CURRENT match data, either! */
2982 tem
= Fmatch_data (Qnil
, Qnil
);
2983 restore_match_data ();
2984 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
2985 Fset_match_data (tem
);
2988 /* For speed, if a search happens within this code,
2989 save the match data in a special nonrecursive fashion. */
2990 running_asynch_code
= 1;
2992 text
= make_string_from_bytes (chars
, nchars
, nbytes
);
2993 internal_condition_case_1 (read_process_output_call
,
2995 Fcons (proc
, Fcons (text
, Qnil
))),
2996 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
2997 read_process_output_error_handler
);
2999 /* If we saved the match data nonrecursively, restore it now. */
3000 restore_match_data ();
3001 running_asynch_code
= outer_running_asynch_code
;
3003 /* Handling the process output should not deactivate the mark. */
3004 Vdeactivate_mark
= odeactivate
;
3006 /* Restore waiting_for_user_input_p as it was
3007 when we were called, in case the filter clobbered it. */
3008 waiting_for_user_input_p
= waiting
;
3010 #if 0 /* Call record_asynch_buffer_change unconditionally,
3011 because we might have changed minor modes or other things
3012 that affect key bindings. */
3013 if (! EQ (Fcurrent_buffer (), obuffer
)
3014 || ! EQ (current_buffer
->keymap
, okeymap
))
3016 /* But do it only if the caller is actually going to read events.
3017 Otherwise there's no need to make him wake up, and it could
3018 cause trouble (for example it would make Fsit_for return). */
3019 if (waiting_for_user_input_p
== -1)
3020 record_asynch_buffer_change ();
3023 start_vms_process_read (vs
);
3025 unbind_to (count
, Qnil
);
3029 /* If no filter, write into buffer if it isn't dead. */
3030 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
3032 Lisp_Object old_read_only
;
3033 int old_begv
, old_zv
;
3034 int old_begv_byte
, old_zv_byte
;
3035 Lisp_Object odeactivate
;
3036 int before
, before_byte
;
3039 odeactivate
= Vdeactivate_mark
;
3041 Fset_buffer (p
->buffer
);
3043 opoint_byte
= PT_BYTE
;
3044 old_read_only
= current_buffer
->read_only
;
3047 old_begv_byte
= BEGV_BYTE
;
3048 old_zv_byte
= ZV_BYTE
;
3050 current_buffer
->read_only
= Qnil
;
3052 /* Insert new output into buffer
3053 at the current end-of-output marker,
3054 thus preserving logical ordering of input and output. */
3055 if (XMARKER (p
->mark
)->buffer
)
3056 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
3057 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
3060 SET_PT_BOTH (ZV
, ZV_BYTE
);
3062 before_byte
= PT_BYTE
;
3064 /* If the output marker is outside of the visible region, save
3065 the restriction and widen. */
3066 if (! (BEGV
<= PT
&& PT
<= ZV
))
3069 if (NILP (current_buffer
->enable_multibyte_characters
))
3072 /* Insert before markers in case we are inserting where
3073 the buffer's mark is, and the user's next command is Meta-y. */
3074 if (chars_in_decoding_buf
)
3076 /* Since multibyteness of p->docoding_buf is corrupted, we
3077 can't use insert_from_string_before_markers. */
3080 temp_buf
= (char *) alloca (nbytes
);
3081 bcopy (XSTRING (p
->decoding_buf
)->data
, temp_buf
, nbytes
);
3082 insert_before_markers (temp_buf
, nbytes
);
3086 insert_1_both (chars
, nchars
, nbytes
, 0, 1, 1);
3087 signal_after_change (opoint
, 0, PT
- opoint
);
3089 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
3091 update_mode_lines
++;
3093 /* Make sure opoint and the old restrictions
3094 float ahead of any new text just as point would. */
3095 if (opoint
>= before
)
3097 opoint
+= PT
- before
;
3098 opoint_byte
+= PT_BYTE
- before_byte
;
3100 if (old_begv
> before
)
3102 old_begv
+= PT
- before
;
3103 old_begv_byte
+= PT_BYTE
- before_byte
;
3105 if (old_zv
>= before
)
3107 old_zv
+= PT
- before
;
3108 old_zv_byte
+= PT_BYTE
- before_byte
;
3111 /* If the restriction isn't what it should be, set it. */
3112 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
3113 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
3115 /* Handling the process output should not deactivate the mark. */
3116 Vdeactivate_mark
= odeactivate
;
3118 current_buffer
->read_only
= old_read_only
;
3119 SET_PT_BOTH (opoint
, opoint_byte
);
3120 set_buffer_internal (old
);
3123 start_vms_process_read (vs
);
3128 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
3130 "Returns non-nil if emacs is waiting for input from the user.\n\
3131 This is intended for use by asynchronous process output filters and sentinels.")
3134 return (waiting_for_user_input_p
? Qt
: Qnil
);
3137 /* Sending data to subprocess */
3139 jmp_buf send_process_frame
;
3142 send_process_trap ()
3148 longjmp (send_process_frame
, 1);
3151 /* Send some data to process PROC.
3152 BUF is the beginning of the data; LEN is the number of characters.
3153 OBJECT is the Lisp object that the data comes from.
3155 The data is encoded by PROC's coding-system for encoding before it
3156 is sent. But if the data ends at the middle of multi-byte
3157 representation, that incomplete sequence of bytes are sent without
3158 being encoded. Should we store them in a buffer to prepend them to
3159 the data send later? */
3162 send_process (proc
, buf
, len
, object
)
3163 volatile Lisp_Object proc
;
3168 /* Use volatile to protect variables from being clobbered by longjmp. */
3170 volatile unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
3171 struct coding_system
*coding
;
3172 struct gcpro gcpro1
;
3173 int carryover
= XINT (XPROCESS (proc
)->encoding_carryover
);
3178 struct Lisp_Process
*p
= XPROCESS (proc
);
3179 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
3182 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3183 update_status (XPROCESS (proc
));
3184 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3185 error ("Process %s not running", procname
);
3186 if (XINT (XPROCESS (proc
)->outfd
) < 0)
3187 error ("Output file descriptor of %s is closed", procname
);
3189 coding
= proc_encode_coding_system
[XINT (XPROCESS (proc
)->outfd
)];
3190 Vlast_coding_system_used
= coding
->symbol
;
3192 if (CODING_REQUIRE_ENCODING (coding
))
3194 int require
= encoding_buffer_size (coding
, len
);
3196 unsigned char *temp_buf
= NULL
;
3198 /* Remember the offset of data because a string or a buffer may
3199 be relocated. Setting OFFSET to -1 means we don't have to
3201 offset
= (BUFFERP (object
)
3202 ? BUF_PTR_BYTE_POS (XBUFFER (object
), buf
)
3204 ? offset
= buf
- XSTRING (object
)->data
3209 temp_buf
= (unsigned char *) xmalloc (len
+ carryover
);
3213 if (BUFFERP (object
))
3214 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
3215 else if (STRINGP (object
))
3216 buf
= offset
+ XSTRING (object
)->data
;
3217 /* Now we don't have to care relocation. */
3220 bcopy ((XSTRING (XPROCESS (proc
)->encoding_buf
)->data
3221 + STRING_BYTES (XSTRING (XPROCESS (proc
)->encoding_buf
))
3225 bcopy (buf
, temp_buf
+ carryover
, len
);
3229 if (STRING_BYTES (XSTRING (XPROCESS (proc
)->encoding_buf
)) < require
)
3231 XPROCESS (proc
)->encoding_buf
= make_uninit_string (require
);
3235 if (BUFFERP (object
))
3236 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
3237 else if (STRINGP (object
))
3238 buf
= offset
+ XSTRING (object
)->data
;
3241 object
= XPROCESS (proc
)->encoding_buf
;
3242 encode_coding (coding
, buf
, XSTRING (object
)->data
,
3243 len
, STRING_BYTES (XSTRING (object
)));
3244 len
= coding
->produced
;
3245 buf
= XSTRING (object
)->data
;
3251 vs
= get_vms_process_pointer (p
->pid
);
3253 error ("Could not find this process: %x", p
->pid
);
3254 else if (write_to_vms_process (vs
, buf
, len
))
3258 if (pty_max_bytes
== 0)
3260 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
3261 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
3263 if (pty_max_bytes
< 0)
3264 pty_max_bytes
= 250;
3266 pty_max_bytes
= 250;
3268 /* Deduct one, to leave space for the eof. */
3272 if (!setjmp (send_process_frame
))
3276 SIGTYPE (*old_sigpipe
)();
3279 /* Decide how much data we can send in one batch.
3280 Long lines need to be split into multiple batches. */
3281 if (!NILP (XPROCESS (proc
)->pty_flag
))
3283 /* Starting this at zero is always correct when not the first iteration
3284 because the previous iteration ended by sending C-d.
3285 It may not be correct for the first iteration
3286 if a partial line was sent in a separate send_process call.
3287 If that proves worth handling, we need to save linepos
3288 in the process object. */
3290 unsigned char *ptr
= buf
;
3291 unsigned char *end
= buf
+ len
;
3293 /* Scan through this text for a line that is too long. */
3294 while (ptr
!= end
&& linepos
< pty_max_bytes
)
3302 /* If we found one, break the line there
3303 and put in a C-d to force the buffer through. */
3307 /* Send this batch, using one or more write calls. */
3310 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
3311 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
3312 signal (SIGPIPE
, old_sigpipe
);
3318 || errno
== EWOULDBLOCK
3324 /* Buffer is full. Wait, accepting input;
3325 that may allow the program
3326 to finish doing output and read more. */
3331 /* Running filters might relocate buffers or strings.
3332 Arrange to relocate BUF. */
3333 if (BUFFERP (object
))
3334 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
3335 else if (STRINGP (object
))
3336 offset
= buf
- XSTRING (object
)->data
;
3338 XSETFASTINT (zero
, 0);
3339 #ifdef EMACS_HAS_USECS
3340 wait_reading_process_input (0, 20000, zero
, 0);
3342 wait_reading_process_input (1, 0, zero
, 0);
3345 if (BUFFERP (object
))
3346 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
3347 else if (STRINGP (object
))
3348 buf
= offset
+ XSTRING (object
)->data
;
3353 /* This is a real error. */
3354 report_file_error ("writing to process", Fcons (proc
, Qnil
));
3361 /* If we sent just part of the string, put in an EOF
3362 to force it through, before we send the rest. */
3364 Fprocess_send_eof (proc
);
3369 XPROCESS (proc
)->raw_status_low
= Qnil
;
3370 XPROCESS (proc
)->raw_status_high
= Qnil
;
3371 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
3372 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
3373 deactivate_process (proc
);
3375 error ("Error writing to process %s; closed it", procname
);
3377 error ("SIGPIPE raised on process %s; closed it", procname
);
3384 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
3386 "Send current contents of region as input to PROCESS.\n\
3387 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3388 nil, indicating the current buffer's process.\n\
3389 Called from program, takes three arguments, PROCESS, START and END.\n\
3390 If the region is more than 500 characters long,\n\
3391 it is sent in several bunches. This may happen even for shorter regions.\n\
3392 Output from processes can arrive in between bunches.")
3393 (process
, start
, end
)
3394 Lisp_Object process
, start
, end
;
3399 proc
= get_process (process
);
3400 validate_region (&start
, &end
);
3402 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
3403 move_gap (XINT (start
));
3405 start1
= CHAR_TO_BYTE (XINT (start
));
3406 end1
= CHAR_TO_BYTE (XINT (end
));
3407 send_process (proc
, BYTE_POS_ADDR (start1
), end1
- start1
,
3408 Fcurrent_buffer ());
3413 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
3415 "Send PROCESS the contents of STRING as input.\n\
3416 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3417 nil, indicating the current buffer's process.\n\
3418 If STRING is more than 500 characters long,\n\
3419 it is sent in several bunches. This may happen even for shorter strings.\n\
3420 Output from processes can arrive in between bunches.")
3422 Lisp_Object process
, string
;
3425 CHECK_STRING (string
, 1);
3426 proc
= get_process (process
);
3427 send_process (proc
, XSTRING (string
)->data
,
3428 STRING_BYTES (XSTRING (string
)), string
);
3432 /* send a signal number SIGNO to PROCESS.
3433 CURRENT_GROUP means send to the process group that currently owns
3434 the terminal being used to communicate with PROCESS.
3435 This is used for various commands in shell mode.
3436 If NOMSG is zero, insert signal-announcements into process's buffers
3439 If we can, we try to signal PROCESS by sending control characters
3440 down the pty. This allows us to signal inferiors who have changed
3441 their uid, for which killpg would return an EPERM error. */
3444 process_send_signal (process
, signo
, current_group
, nomsg
)
3445 Lisp_Object process
;
3447 Lisp_Object current_group
;
3451 register struct Lisp_Process
*p
;
3455 proc
= get_process (process
);
3456 p
= XPROCESS (proc
);
3458 if (!EQ (p
->childp
, Qt
))
3459 error ("Process %s is not a subprocess",
3460 XSTRING (p
->name
)->data
);
3461 if (XINT (p
->infd
) < 0)
3462 error ("Process %s is not active",
3463 XSTRING (p
->name
)->data
);
3465 if (NILP (p
->pty_flag
))
3466 current_group
= Qnil
;
3468 /* If we are using pgrps, get a pgrp number and make it negative. */
3469 if (!NILP (current_group
))
3471 #ifdef SIGNALS_VIA_CHARACTERS
3472 /* If possible, send signals to the entire pgrp
3473 by sending an input character to it. */
3475 /* TERMIOS is the latest and bestest, and seems most likely to
3476 work. If the system has it, use it. */
3483 tcgetattr (XINT (p
->infd
), &t
);
3484 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
3488 tcgetattr (XINT (p
->infd
), &t
);
3489 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
3493 tcgetattr (XINT (p
->infd
), &t
);
3494 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
3495 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
3497 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
3502 #else /* ! HAVE_TERMIOS */
3504 /* On Berkeley descendants, the following IOCTL's retrieve the
3505 current control characters. */
3506 #if defined (TIOCGLTC) && defined (TIOCGETC)
3514 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
3515 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
3518 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
3519 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
3523 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
3524 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
3526 #endif /* ! defined (SIGTSTP) */
3529 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
3531 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
3538 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3539 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
3542 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3543 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
3547 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3548 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
3550 #endif /* ! defined (SIGTSTP) */
3552 #else /* ! defined (TCGETA) */
3553 Your configuration files are messed up
.
3554 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
3555 you'd better be using one of the alternatives above! */
3556 #endif /* ! defined (TCGETA) */
3557 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
3558 #endif /* ! defined HAVE_TERMIOS */
3559 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
3562 /* Get the pgrp using the tty itself, if we have that.
3563 Otherwise, use the pty to get the pgrp.
3564 On pfa systems, saka@pfu.fujitsu.co.JP writes:
3565 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
3566 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
3567 His patch indicates that if TIOCGPGRP returns an error, then
3568 we should just assume that p->pid is also the process group id. */
3572 if (!NILP (p
->subtty
))
3573 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
3575 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
3579 gid
= - XFASTINT (p
->pid
);
3580 #endif /* ! defined (pfa) */
3586 #else /* ! defined (TIOCGPGRP ) */
3587 /* Can't select pgrps on this system, so we know that
3588 the child itself heads the pgrp. */
3589 gid
= - XFASTINT (p
->pid
);
3590 #endif /* ! defined (TIOCGPGRP ) */
3593 gid
= - XFASTINT (p
->pid
);
3599 p
->raw_status_low
= Qnil
;
3600 p
->raw_status_high
= Qnil
;
3602 XSETINT (p
->tick
, ++process_tick
);
3606 #endif /* ! defined (SIGCONT) */
3609 send_process (proc
, "\003", 1, Qnil
); /* ^C */
3614 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
3619 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
3622 flush_pending_output (XINT (p
->infd
));
3626 /* If we don't have process groups, send the signal to the immediate
3627 subprocess. That isn't really right, but it's better than any
3628 obvious alternative. */
3631 kill (XFASTINT (p
->pid
), signo
);
3635 /* gid may be a pid, or minus a pgrp's number */
3637 if (!NILP (current_group
))
3638 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
3641 gid
= - XFASTINT (p
->pid
);
3644 #else /* ! defined (TIOCSIGSEND) */
3645 EMACS_KILLPG (-gid
, signo
);
3646 #endif /* ! defined (TIOCSIGSEND) */
3649 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
3650 "Interrupt process PROCESS.\n\
3651 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
3652 nil or no arg means current buffer's process.\n\
3653 Second arg CURRENT-GROUP non-nil means send signal to\n\
3654 the current process-group of the process's controlling terminal\n\
3655 rather than to the process's own process group.\n\
3656 If the process is a shell, this means interrupt current subjob\n\
3657 rather than the shell.")
3658 (process
, current_group
)
3659 Lisp_Object process
, current_group
;
3661 process_send_signal (process
, SIGINT
, current_group
, 0);
3665 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
3666 "Kill process PROCESS. May be process or name of one.\n\
3667 See function `interrupt-process' for more details on usage.")
3668 (process
, current_group
)
3669 Lisp_Object process
, current_group
;
3671 process_send_signal (process
, SIGKILL
, current_group
, 0);
3675 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
3676 "Send QUIT signal to process PROCESS. May be process or name of one.\n\
3677 See function `interrupt-process' for more details on usage.")
3678 (process
, current_group
)
3679 Lisp_Object process
, current_group
;
3681 process_send_signal (process
, SIGQUIT
, current_group
, 0);
3685 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
3686 "Stop process PROCESS. May be process or name of one.\n\
3687 See function `interrupt-process' for more details on usage.")
3688 (process
, current_group
)
3689 Lisp_Object process
, current_group
;
3692 error ("no SIGTSTP support");
3694 process_send_signal (process
, SIGTSTP
, current_group
, 0);
3699 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
3700 "Continue process PROCESS. May be process or name of one.\n\
3701 See function `interrupt-process' for more details on usage.")
3702 (process
, current_group
)
3703 Lisp_Object process
, current_group
;
3706 process_send_signal (process
, SIGCONT
, current_group
, 0);
3708 error ("no SIGCONT support");
3713 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
3714 2, 2, "nProcess number: \nnSignal code: ",
3715 "Send the process with process id PID the signal with code SIGCODE.\n\
3716 PID must be an integer. The process need not be a child of this Emacs.\n\
3717 SIGCODE may be an integer, or a symbol whose name is a signal name.")
3719 Lisp_Object pid
, sigcode
;
3721 CHECK_NUMBER (pid
, 0);
3723 #define handle_signal(NAME, VALUE) \
3724 else if (!strcmp (name, NAME)) \
3725 XSETINT (sigcode, VALUE)
3727 if (INTEGERP (sigcode
))
3731 unsigned char *name
;
3733 CHECK_SYMBOL (sigcode
, 1);
3734 name
= XSYMBOL (sigcode
)->name
->data
;
3739 handle_signal ("SIGHUP", SIGHUP
);
3742 handle_signal ("SIGINT", SIGINT
);
3745 handle_signal ("SIGQUIT", SIGQUIT
);
3748 handle_signal ("SIGILL", SIGILL
);
3751 handle_signal ("SIGABRT", SIGABRT
);
3754 handle_signal ("SIGEMT", SIGEMT
);
3757 handle_signal ("SIGKILL", SIGKILL
);
3760 handle_signal ("SIGFPE", SIGFPE
);
3763 handle_signal ("SIGBUS", SIGBUS
);
3766 handle_signal ("SIGSEGV", SIGSEGV
);
3769 handle_signal ("SIGSYS", SIGSYS
);
3772 handle_signal ("SIGPIPE", SIGPIPE
);
3775 handle_signal ("SIGALRM", SIGALRM
);
3778 handle_signal ("SIGTERM", SIGTERM
);
3781 handle_signal ("SIGURG", SIGURG
);
3784 handle_signal ("SIGSTOP", SIGSTOP
);
3787 handle_signal ("SIGTSTP", SIGTSTP
);
3790 handle_signal ("SIGCONT", SIGCONT
);
3793 handle_signal ("SIGCHLD", SIGCHLD
);
3796 handle_signal ("SIGTTIN", SIGTTIN
);
3799 handle_signal ("SIGTTOU", SIGTTOU
);
3802 handle_signal ("SIGIO", SIGIO
);
3805 handle_signal ("SIGXCPU", SIGXCPU
);
3808 handle_signal ("SIGXFSZ", SIGXFSZ
);
3811 handle_signal ("SIGVTALRM", SIGVTALRM
);
3814 handle_signal ("SIGPROF", SIGPROF
);
3817 handle_signal ("SIGWINCH", SIGWINCH
);
3820 handle_signal ("SIGINFO", SIGINFO
);
3823 handle_signal ("SIGUSR1", SIGUSR1
);
3826 handle_signal ("SIGUSR2", SIGUSR2
);
3829 error ("Undefined signal name %s", name
);
3832 #undef handle_signal
3834 return make_number (kill (XINT (pid
), XINT (sigcode
)));
3837 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
3838 "Make PROCESS see end-of-file in its input.\n\
3839 EOF comes after any text already sent to it.\n\
3840 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3841 nil, indicating the current buffer's process.\n\
3842 If PROCESS is a network connection, or is a process communicating\n\
3843 through a pipe (as opposed to a pty), then you cannot send any more\n\
3844 text to PROCESS after you call this function.")
3846 Lisp_Object process
;
3850 proc
= get_process (process
);
3852 /* Make sure the process is really alive. */
3853 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3854 update_status (XPROCESS (proc
));
3855 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3856 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
3859 send_process (proc
, "\032", 1, Qnil
); /* ^z */
3861 if (!NILP (XPROCESS (proc
)->pty_flag
))
3862 send_process (proc
, "\004", 1, Qnil
);
3865 int old_outfd
, new_outfd
;
3867 #ifdef HAVE_SHUTDOWN
3868 /* If this is a network connection, or socketpair is used
3869 for communication with the subprocess, call shutdown to cause EOF.
3870 (In some old system, shutdown to socketpair doesn't work.
3871 Then we just can't win.) */
3872 if (NILP (XPROCESS (proc
)->pid
)
3873 || XINT (XPROCESS (proc
)->outfd
) == XINT (XPROCESS (proc
)->infd
))
3874 shutdown (XINT (XPROCESS (proc
)->outfd
), 1);
3875 /* In case of socketpair, outfd == infd, so don't close it. */
3876 if (XINT (XPROCESS (proc
)->outfd
) != XINT (XPROCESS (proc
)->infd
))
3877 close (XINT (XPROCESS (proc
)->outfd
));
3878 #else /* not HAVE_SHUTDOWN */
3879 close (XINT (XPROCESS (proc
)->outfd
));
3880 #endif /* not HAVE_SHUTDOWN */
3881 new_outfd
= open (NULL_DEVICE
, O_WRONLY
);
3882 old_outfd
= XINT (XPROCESS (proc
)->outfd
);
3884 if (!proc_encode_coding_system
[new_outfd
])
3885 proc_encode_coding_system
[new_outfd
]
3886 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
3887 bcopy (proc_encode_coding_system
[old_outfd
],
3888 proc_encode_coding_system
[new_outfd
],
3889 sizeof (struct coding_system
));
3890 bzero (proc_encode_coding_system
[old_outfd
],
3891 sizeof (struct coding_system
));
3893 XSETINT (XPROCESS (proc
)->outfd
, new_outfd
);
3899 /* Kill all processes associated with `buffer'.
3900 If `buffer' is nil, kill all processes */
3903 kill_buffer_processes (buffer
)
3906 Lisp_Object tail
, proc
;
3908 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3910 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3911 if (GC_PROCESSP (proc
)
3912 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
3914 if (NETCONN_P (proc
))
3915 Fdelete_process (proc
);
3916 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
3917 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
3922 /* On receipt of a signal that a child status has changed,
3923 loop asking about children with changed statuses until
3924 the system says there are no more.
3925 All we do is change the status;
3926 we do not run sentinels or print notifications.
3927 That is saved for the next time keyboard input is done,
3928 in order to avoid timing errors. */
3930 /** WARNING: this can be called during garbage collection.
3931 Therefore, it must not be fooled by the presence of mark bits in
3934 /** USG WARNING: Although it is not obvious from the documentation
3935 in signal(2), on a USG system the SIGCLD handler MUST NOT call
3936 signal() before executing at least one wait(), otherwise the handler
3937 will be called again, resulting in an infinite loop. The relevant
3938 portion of the documentation reads "SIGCLD signals will be queued
3939 and the signal-catching function will be continually reentered until
3940 the queue is empty". Invoking signal() causes the kernel to reexamine
3941 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
3944 sigchld_handler (signo
)
3947 int old_errno
= errno
;
3949 register struct Lisp_Process
*p
;
3950 extern EMACS_TIME
*input_available_clear_time
;
3954 sigheld
|= sigbit (SIGCHLD
);
3966 #endif /* no WUNTRACED */
3967 /* Keep trying to get a status until we get a definitive result. */
3971 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
3973 while (pid
<= 0 && errno
== EINTR
);
3977 /* A real failure. We have done all our job, so return. */
3979 /* USG systems forget handlers when they are used;
3980 must reestablish each time */
3981 #if defined (USG) && !defined (POSIX_SIGNALS)
3982 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
3985 sigheld
&= ~sigbit (SIGCHLD
);
3993 #endif /* no WNOHANG */
3995 /* Find the process that signaled us, and record its status. */
3998 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
4000 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
4001 p
= XPROCESS (proc
);
4002 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
4007 /* Look for an asynchronous process whose pid hasn't been filled
4010 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
4012 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
4013 p
= XPROCESS (proc
);
4014 if (INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
4019 /* Change the status of the process that was found. */
4022 union { int i
; WAITTYPE wt
; } u
;
4023 int clear_desc_flag
= 0;
4025 XSETINT (p
->tick
, ++process_tick
);
4027 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
4028 XSETINT (p
->raw_status_high
, u
.i
>> 16);
4030 /* If process has terminated, stop waiting for its output. */
4031 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
4032 && XINT (p
->infd
) >= 0)
4033 clear_desc_flag
= 1;
4035 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
4036 if (clear_desc_flag
)
4038 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
4039 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
4042 /* Tell wait_reading_process_input that it needs to wake up and
4044 if (input_available_clear_time
)
4045 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
4048 /* There was no asynchronous process found for that id. Check
4049 if we have a synchronous process. */
4052 synch_process_alive
= 0;
4054 /* Report the status of the synchronous process. */
4056 synch_process_retcode
= WRETCODE (w
);
4057 else if (WIFSIGNALED (w
))
4059 int code
= WTERMSIG (w
);
4065 /* Suppress warning if the table has const char *. */
4066 signame
= (char *) sys_siglist
[code
];
4068 signame
= sys_errlist
[code
];
4072 signame
= "unknown";
4074 synch_process_death
= signame
;
4077 /* Tell wait_reading_process_input that it needs to wake up and
4079 if (input_available_clear_time
)
4080 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
4083 /* On some systems, we must return right away.
4084 If any more processes want to signal us, we will
4086 Otherwise (on systems that have WNOHANG), loop around
4087 to use up all the processes that have something to tell us. */
4088 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT)
4089 #if defined (USG) && ! defined (POSIX_SIGNALS)
4090 signal (signo
, sigchld_handler
);
4094 #endif /* USG, but not HPUX with WNOHANG */
4100 exec_sentinel_unwind (data
)
4103 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
4108 exec_sentinel_error_handler (error
)
4111 cmd_error_internal (error
, "error in process sentinel: ");
4113 update_echo_area ();
4114 Fsleep_for (make_number (2), Qnil
);
4118 exec_sentinel (proc
, reason
)
4119 Lisp_Object proc
, reason
;
4121 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
4122 register struct Lisp_Process
*p
= XPROCESS (proc
);
4123 int count
= specpdl_ptr
- specpdl
;
4124 int outer_running_asynch_code
= running_asynch_code
;
4125 int waiting
= waiting_for_user_input_p
;
4127 /* No need to gcpro these, because all we do with them later
4128 is test them for EQness, and none of them should be a string. */
4129 odeactivate
= Vdeactivate_mark
;
4130 XSETBUFFER (obuffer
, current_buffer
);
4131 okeymap
= current_buffer
->keymap
;
4133 sentinel
= p
->sentinel
;
4134 if (NILP (sentinel
))
4137 /* Zilch the sentinel while it's running, to avoid recursive invocations;
4138 assure that it gets restored no matter how the sentinel exits. */
4140 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
4141 /* Inhibit quit so that random quits don't screw up a running filter. */
4142 specbind (Qinhibit_quit
, Qt
);
4143 specbind (Qlast_nonmenu_event
, Qt
);
4145 /* In case we get recursively called,
4146 and we already saved the match data nonrecursively,
4147 save the same match data in safely recursive fashion. */
4148 if (outer_running_asynch_code
)
4151 tem
= Fmatch_data (Qnil
, Qnil
);
4152 restore_match_data ();
4153 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
4154 Fset_match_data (tem
);
4157 /* For speed, if a search happens within this code,
4158 save the match data in a special nonrecursive fashion. */
4159 running_asynch_code
= 1;
4161 internal_condition_case_1 (read_process_output_call
,
4163 Fcons (proc
, Fcons (reason
, Qnil
))),
4164 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
4165 exec_sentinel_error_handler
);
4167 /* If we saved the match data nonrecursively, restore it now. */
4168 restore_match_data ();
4169 running_asynch_code
= outer_running_asynch_code
;
4171 Vdeactivate_mark
= odeactivate
;
4173 /* Restore waiting_for_user_input_p as it was
4174 when we were called, in case the filter clobbered it. */
4175 waiting_for_user_input_p
= waiting
;
4178 if (! EQ (Fcurrent_buffer (), obuffer
)
4179 || ! EQ (current_buffer
->keymap
, okeymap
))
4181 /* But do it only if the caller is actually going to read events.
4182 Otherwise there's no need to make him wake up, and it could
4183 cause trouble (for example it would make Fsit_for return). */
4184 if (waiting_for_user_input_p
== -1)
4185 record_asynch_buffer_change ();
4187 unbind_to (count
, Qnil
);
4190 /* Report all recent events of a change in process status
4191 (either run the sentinel or output a message).
4192 This is done while Emacs is waiting for keyboard input. */
4197 register Lisp_Object proc
, buffer
;
4198 Lisp_Object tail
, msg
;
4199 struct gcpro gcpro1
, gcpro2
;
4203 /* We need to gcpro tail; if read_process_output calls a filter
4204 which deletes a process and removes the cons to which tail points
4205 from Vprocess_alist, and then causes a GC, tail is an unprotected
4209 /* Set this now, so that if new processes are created by sentinels
4210 that we run, we get called again to handle their status changes. */
4211 update_tick
= process_tick
;
4213 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
4216 register struct Lisp_Process
*p
;
4218 proc
= Fcdr (Fcar (tail
));
4219 p
= XPROCESS (proc
);
4221 if (XINT (p
->tick
) != XINT (p
->update_tick
))
4223 XSETINT (p
->update_tick
, XINT (p
->tick
));
4225 /* If process is still active, read any output that remains. */
4226 while (! EQ (p
->filter
, Qt
)
4227 && XINT (p
->infd
) >= 0
4228 && read_process_output (proc
, XINT (p
->infd
)) > 0);
4232 /* Get the text to use for the message. */
4233 if (!NILP (p
->raw_status_low
))
4235 msg
= status_message (p
->status
);
4237 /* If process is terminated, deactivate it or delete it. */
4239 if (CONSP (p
->status
))
4240 symbol
= XCONS (p
->status
)->car
;
4242 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
4243 || EQ (symbol
, Qclosed
))
4245 if (delete_exited_processes
)
4246 remove_process (proc
);
4248 deactivate_process (proc
);
4251 /* The actions above may have further incremented p->tick.
4252 So set p->update_tick again
4253 so that an error in the sentinel will not cause
4254 this code to be run again. */
4255 XSETINT (p
->update_tick
, XINT (p
->tick
));
4256 /* Now output the message suitably. */
4257 if (!NILP (p
->sentinel
))
4258 exec_sentinel (proc
, msg
);
4259 /* Don't bother with a message in the buffer
4260 when a process becomes runnable. */
4261 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
4263 Lisp_Object ro
, tem
;
4264 struct buffer
*old
= current_buffer
;
4265 int opoint
, opoint_byte
;
4266 int before
, before_byte
;
4268 ro
= XBUFFER (buffer
)->read_only
;
4270 /* Avoid error if buffer is deleted
4271 (probably that's why the process is dead, too) */
4272 if (NILP (XBUFFER (buffer
)->name
))
4274 Fset_buffer (buffer
);
4277 opoint_byte
= PT_BYTE
;
4278 /* Insert new output into buffer
4279 at the current end-of-output marker,
4280 thus preserving logical ordering of input and output. */
4281 if (XMARKER (p
->mark
)->buffer
)
4282 Fgoto_char (p
->mark
);
4284 SET_PT_BOTH (ZV
, ZV_BYTE
);
4287 before_byte
= PT_BYTE
;
4289 tem
= current_buffer
->read_only
;
4290 current_buffer
->read_only
= Qnil
;
4291 insert_string ("\nProcess ");
4292 Finsert (1, &p
->name
);
4293 insert_string (" ");
4295 current_buffer
->read_only
= tem
;
4296 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
4298 if (opoint
>= before
)
4299 SET_PT_BOTH (opoint
+ (PT
- before
),
4300 opoint_byte
+ (PT_BYTE
- before_byte
));
4302 SET_PT_BOTH (opoint
, opoint_byte
);
4304 set_buffer_internal (old
);
4309 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
4310 redisplay_preserve_echo_area ();
4316 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
4317 Sset_process_coding_system
, 1, 3, 0,
4318 "Set coding systems of PROCESS to DECODING and ENCODING.\n\
4319 DECODING will be used to decode subprocess output and ENCODING to\n\
4320 encode subprocess input.")
4321 (proc
, decoding
, encoding
)
4322 register Lisp_Object proc
, decoding
, encoding
;
4324 register struct Lisp_Process
*p
;
4326 CHECK_PROCESS (proc
, 0);
4327 p
= XPROCESS (proc
);
4328 if (XINT (p
->infd
) < 0)
4329 error ("Input file descriptor of %s closed", XSTRING (p
->name
)->data
);
4330 if (XINT (p
->outfd
) < 0)
4331 error ("Output file descriptor of %s closed", XSTRING (p
->name
)->data
);
4333 p
->decode_coding_system
= Fcheck_coding_system (decoding
);
4334 p
->encode_coding_system
= Fcheck_coding_system (encoding
);
4335 setup_coding_system (decoding
,
4336 proc_decode_coding_system
[XINT (p
->infd
)]);
4337 setup_coding_system (encoding
,
4338 proc_encode_coding_system
[XINT (p
->outfd
)]);
4343 DEFUN ("process-coding-system",
4344 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
4345 "Return a cons of coding systems for decoding and encoding of PROCESS.")
4347 register Lisp_Object proc
;
4349 CHECK_PROCESS (proc
, 0);
4350 return Fcons (XPROCESS (proc
)->decode_coding_system
,
4351 XPROCESS (proc
)->encode_coding_system
);
4354 /* The first time this is called, assume keyboard input comes from DESC
4355 instead of from where we used to expect it.
4356 Subsequent calls mean assume input keyboard can come from DESC
4357 in addition to other places. */
4359 static int add_keyboard_wait_descriptor_called_flag
;
4362 add_keyboard_wait_descriptor (desc
)
4365 if (! add_keyboard_wait_descriptor_called_flag
)
4366 FD_CLR (0, &input_wait_mask
);
4367 add_keyboard_wait_descriptor_called_flag
= 1;
4368 FD_SET (desc
, &input_wait_mask
);
4369 FD_SET (desc
, &non_process_wait_mask
);
4370 if (desc
> max_keyboard_desc
)
4371 max_keyboard_desc
= desc
;
4374 /* From now on, do not expect DESC to give keyboard input. */
4377 delete_keyboard_wait_descriptor (desc
)
4381 int lim
= max_keyboard_desc
;
4383 FD_CLR (desc
, &input_wait_mask
);
4384 FD_CLR (desc
, &non_process_wait_mask
);
4386 if (desc
== max_keyboard_desc
)
4387 for (fd
= 0; fd
< lim
; fd
++)
4388 if (FD_ISSET (fd
, &input_wait_mask
)
4389 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
4390 max_keyboard_desc
= fd
;
4393 /* Return nonzero if *MASK has a bit set
4394 that corresponds to one of the keyboard input descriptors. */
4397 keyboard_bit_set (mask
)
4402 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
4403 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
4404 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
4417 if (! noninteractive
|| initialized
)
4419 signal (SIGCHLD
, sigchld_handler
);
4422 FD_ZERO (&input_wait_mask
);
4423 FD_ZERO (&non_keyboard_wait_mask
);
4424 FD_ZERO (&non_process_wait_mask
);
4425 max_process_desc
= 0;
4427 FD_SET (0, &input_wait_mask
);
4429 Vprocess_alist
= Qnil
;
4430 for (i
= 0; i
< MAXDESC
; i
++)
4432 chan_process
[i
] = Qnil
;
4433 proc_buffered_char
[i
] = -1;
4435 bzero (proc_decode_coding_system
, sizeof proc_decode_coding_system
);
4436 bzero (proc_encode_coding_system
, sizeof proc_encode_coding_system
);
4438 Vdefault_process_coding_system
4439 = (NILP (buffer_defaults
.enable_multibyte_characters
)
4440 ? Fcons (Qraw_text
, Qnil
)
4441 : Fcons (Qemacs_mule
, Qnil
));
4447 Qprocessp
= intern ("processp");
4448 staticpro (&Qprocessp
);
4449 Qrun
= intern ("run");
4451 Qstop
= intern ("stop");
4453 Qsignal
= intern ("signal");
4454 staticpro (&Qsignal
);
4456 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
4459 Qexit = intern ("exit");
4460 staticpro (&Qexit); */
4462 Qopen
= intern ("open");
4464 Qclosed
= intern ("closed");
4465 staticpro (&Qclosed
);
4467 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
4468 staticpro (&Qlast_nonmenu_event
);
4470 staticpro (&Vprocess_alist
);
4472 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
4473 "*Non-nil means delete processes immediately when they exit.\n\
4474 nil means don't delete them until `list-processes' is run.");
4476 delete_exited_processes
= 1;
4478 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
4479 "Control type of device used to communicate with subprocesses.\n\
4480 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
4481 The value has no effect if the system has no ptys or if all ptys are busy:\n\
4482 then a pipe is used in any case.\n\
4483 The value takes effect when `start-process' is called.");
4484 Vprocess_connection_type
= Qt
;
4486 defsubr (&Sprocessp
);
4487 defsubr (&Sget_process
);
4488 defsubr (&Sget_buffer_process
);
4489 defsubr (&Sdelete_process
);
4490 defsubr (&Sprocess_status
);
4491 defsubr (&Sprocess_exit_status
);
4492 defsubr (&Sprocess_id
);
4493 defsubr (&Sprocess_name
);
4494 defsubr (&Sprocess_tty_name
);
4495 defsubr (&Sprocess_command
);
4496 defsubr (&Sset_process_buffer
);
4497 defsubr (&Sprocess_buffer
);
4498 defsubr (&Sprocess_mark
);
4499 defsubr (&Sset_process_filter
);
4500 defsubr (&Sprocess_filter
);
4501 defsubr (&Sset_process_sentinel
);
4502 defsubr (&Sprocess_sentinel
);
4503 defsubr (&Sset_process_window_size
);
4504 defsubr (&Sset_process_inherit_coding_system_flag
);
4505 defsubr (&Sprocess_inherit_coding_system_flag
);
4506 defsubr (&Sprocess_kill_without_query
);
4507 defsubr (&Sprocess_contact
);
4508 defsubr (&Slist_processes
);
4509 defsubr (&Sprocess_list
);
4510 defsubr (&Sstart_process
);
4512 defsubr (&Sopen_network_stream
);
4513 #endif /* HAVE_SOCKETS */
4514 defsubr (&Saccept_process_output
);
4515 defsubr (&Sprocess_send_region
);
4516 defsubr (&Sprocess_send_string
);
4517 defsubr (&Sinterrupt_process
);
4518 defsubr (&Skill_process
);
4519 defsubr (&Squit_process
);
4520 defsubr (&Sstop_process
);
4521 defsubr (&Scontinue_process
);
4522 defsubr (&Sprocess_send_eof
);
4523 defsubr (&Ssignal_process
);
4524 defsubr (&Swaiting_for_user_input_p
);
4525 /* defsubr (&Sprocess_connection); */
4526 defsubr (&Sset_process_coding_system
);
4527 defsubr (&Sprocess_coding_system
);
4531 #else /* not subprocesses */
4533 #include <sys/types.h>
4537 #include "systime.h"
4538 #include "charset.h"
4540 #include "termopts.h"
4541 #include "sysselect.h"
4543 extern int frame_garbaged
;
4545 extern EMACS_TIME
timer_check ();
4546 extern int timers_run
;
4548 /* As described above, except assuming that there are no subprocesses:
4550 Wait for timeout to elapse and/or keyboard input to be available.
4553 timeout in seconds, or
4554 zero for no limit, or
4555 -1 means gobble data immediately available but don't wait for any.
4557 read_kbd is a Lisp_Object:
4558 0 to ignore keyboard input, or
4559 1 to return when input is available, or
4560 -1 means caller will actually read the input, so don't throw to
4562 a cons cell, meaning wait until its car is non-nil
4563 (and gobble terminal input into the buffer if any arrives), or
4564 We know that read_kbd will never be a Lisp_Process, since
4565 `subprocesses' isn't defined.
4567 do_display != 0 means redisplay should be done to show subprocess
4568 output that arrives.
4570 Return true iff we received input from any process. */
4573 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
4574 int time_limit
, microsecs
;
4575 Lisp_Object read_kbd
;
4579 EMACS_TIME end_time
, timeout
;
4580 SELECT_TYPE waitchannels
;
4582 Lisp_Object
*wait_for_cell
= 0;
4584 /* If waiting for non-nil in a cell, record where. */
4585 if (CONSP (read_kbd
))
4587 wait_for_cell
= &XCONS (read_kbd
)->car
;
4588 XSETFASTINT (read_kbd
, 0);
4591 /* What does time_limit really mean? */
4592 if (time_limit
|| microsecs
)
4594 EMACS_GET_TIME (end_time
);
4595 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4596 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4599 /* Turn off periodic alarms (in case they are in use)
4600 because the select emulator uses alarms. */
4605 int timeout_reduced_for_timers
= 0;
4607 /* If calling from keyboard input, do not quit
4608 since we want to return C-g as an input character.
4609 Otherwise, do pending quit if requested. */
4610 if (XINT (read_kbd
) >= 0)
4613 /* Exit now if the cell we're waiting for became non-nil. */
4614 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
4617 /* Compute time from now till when time limit is up */
4618 /* Exit if already run out */
4619 if (time_limit
== -1)
4621 /* -1 specified for timeout means
4622 gobble output available now
4623 but don't wait at all. */
4625 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4627 else if (time_limit
|| microsecs
)
4629 EMACS_GET_TIME (timeout
);
4630 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4631 if (EMACS_TIME_NEG_P (timeout
))
4636 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4639 /* If our caller will not immediately handle keyboard events,
4640 run timer events directly.
4641 (Callers that will immediately read keyboard events
4642 call timer_delay on their own.) */
4643 if (! wait_for_cell
)
4645 EMACS_TIME timer_delay
;
4649 old_timers_run
= timers_run
;
4650 timer_delay
= timer_check (1);
4651 if (timers_run
!= old_timers_run
&& do_display
)
4653 redisplay_preserve_echo_area ();
4654 /* We must retry, since a timer may have requeued itself
4655 and that could alter the time delay. */
4659 /* If there is unread keyboard input, also return. */
4660 if (XINT (read_kbd
) != 0
4661 && requeued_events_pending_p ())
4664 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4666 EMACS_TIME difference
;
4667 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4668 if (EMACS_TIME_NEG_P (difference
))
4670 timeout
= timer_delay
;
4671 timeout_reduced_for_timers
= 1;
4676 /* Cause C-g and alarm signals to take immediate action,
4677 and cause input available signals to zero out timeout. */
4678 if (XINT (read_kbd
) < 0)
4679 set_waiting_for_input (&timeout
);
4681 /* Wait till there is something to do. */
4683 if (! XINT (read_kbd
) && wait_for_cell
== 0)
4684 FD_ZERO (&waitchannels
);
4686 FD_SET (0, &waitchannels
);
4688 /* If a frame has been newly mapped and needs updating,
4689 reprocess its display stuff. */
4690 if (frame_garbaged
&& do_display
)
4692 clear_waiting_for_input ();
4693 redisplay_preserve_echo_area ();
4694 if (XINT (read_kbd
) < 0)
4695 set_waiting_for_input (&timeout
);
4698 if (XINT (read_kbd
) && detect_input_pending ())
4701 FD_ZERO (&waitchannels
);
4704 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
4709 /* Make C-g and alarm signals set flags again */
4710 clear_waiting_for_input ();
4712 /* If we woke up due to SIGWINCH, actually change size now. */
4713 do_pending_window_change ();
4715 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4716 /* We waited the full specified time, so return now. */
4721 /* If the system call was interrupted, then go around the
4723 if (xerrno
== EINTR
)
4724 FD_ZERO (&waitchannels
);
4726 error ("select error: %s", strerror (xerrno
));
4729 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
4730 /* System sometimes fails to deliver SIGIO. */
4731 kill (getpid (), SIGIO
);
4734 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
4735 kill (getpid (), SIGIO
);
4738 /* Check for keyboard input */
4740 if ((XINT (read_kbd
) != 0)
4741 && detect_input_pending_run_timers (do_display
))
4743 swallow_events (do_display
);
4744 if (detect_input_pending_run_timers (do_display
))
4748 /* If there is unread keyboard input, also return. */
4749 if (XINT (read_kbd
) != 0
4750 && requeued_events_pending_p ())
4753 /* If wait_for_cell. check for keyboard input
4754 but don't run any timers.
4755 ??? (It seems wrong to me to check for keyboard
4756 input at all when wait_for_cell, but the code
4757 has been this way since July 1994.
4758 Try changing this after version 19.31.) */
4760 && detect_input_pending ())
4762 swallow_events (do_display
);
4763 if (detect_input_pending ())
4767 /* Exit now if the cell we're waiting for became non-nil. */
4768 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
4778 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
4779 /* Don't confuse make-docfile by having two doc strings for this function.
4780 make-docfile does not pay attention to #if, for good reason! */
4783 register Lisp_Object name
;
4788 DEFUN ("process-inherit-coding-system-flag",
4789 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
4791 /* Don't confuse make-docfile by having two doc strings for this function.
4792 make-docfile does not pay attention to #if, for good reason! */
4795 register Lisp_Object process
;
4797 /* Ignore the argument and return the value of
4798 inherit-process-coding-system. */
4799 return inherit_process_coding_system
? Qt
: Qnil
;
4802 /* Kill all processes associated with `buffer'.
4803 If `buffer' is nil, kill all processes.
4804 Since we have no subprocesses, this does nothing. */
4807 kill_buffer_processes (buffer
)
4820 defsubr (&Sget_buffer_process
);
4821 defsubr (&Sprocess_inherit_coding_system_flag
);
4825 #endif /* not subprocesses */