1 /* Asynchronous subprocess control for GNU Emacs.
2 Copyright (C) 1985, 86, 87, 88, 93, 94 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
6 GNU Emacs is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU Emacs is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU Emacs; see the file COPYING. If not, write to
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
25 /* This file is split into two parts by the following preprocessor
26 conditional. The 'then' clause contains all of the support for
27 asynchronous subprocesses. The 'else' clause contains stub
28 versions of some of the asynchronous subprocess routines that are
29 often called elsewhere in Emacs, so we don't have to #ifdef the
30 sections that call them. */
38 #include <sys/types.h> /* some typedefs are used in sys/file.h */
45 #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */
46 #include <sys/socket.h>
48 #include <netinet/in.h>
49 #include <arpa/inet.h>
50 #endif /* HAVE_SOCKETS */
52 /* TERM is a poor-man's SLIP, used on Linux. */
57 /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */
58 #ifdef HAVE_BROKEN_INET_ADDR
59 #define IN_ADDR struct in_addr
60 #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1)
62 #define IN_ADDR unsigned long
63 #define NUMERIC_ADDR_ERROR (numeric_addr == -1)
66 #if defined(BSD) || defined(STRIDE)
67 #include <sys/ioctl.h>
68 #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5)
70 #endif /* HAVE_PTYS and no O_NDELAY */
71 #endif /* BSD or STRIDE */
73 #ifdef BROKEN_O_NONBLOCK
75 #endif /* BROKEN_O_NONBLOCK */
82 #include <sys/sysmacros.h> /* for "minor" */
92 #include "termhooks.h"
97 Lisp_Object Qprocessp
;
98 Lisp_Object Qrun
, Qstop
, Qsignal
, Qopen
, Qclosed
;
99 /* Qexit is declared and initialized in eval.c. */
101 /* a process object is a network connection when its childp field is neither
102 Qt nor Qnil but is instead a string (name of foreign host we
103 are connected to + name of port we are connected to) */
106 static Lisp_Object stream_process
;
108 #define NETCONN_P(p) (XGCTYPE (XPROCESS (p)->childp) == Lisp_String)
110 #define NETCONN_P(p) 0
111 #endif /* HAVE_SOCKETS */
113 /* Define first descriptor number available for subprocesses. */
115 #define FIRST_PROC_DESC 1
117 #define FIRST_PROC_DESC 3
120 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
123 #if !defined (SIGCHLD) && defined (SIGCLD)
124 #define SIGCHLD SIGCLD
127 #include "syssignal.h"
132 extern char *strerror ();
134 extern char *sys_errlist
[];
137 #ifndef SYS_SIGLIST_DECLARED
141 extern char *sys_siglist
[];
142 #endif /* not LINUX */
144 char *sys_siglist
[] =
150 "illegal instruction",
154 "floating point exception",
157 "segmentation violation",
158 "bad argument to system call",
159 "write on a pipe with no one to read it",
161 "software termination signal from kill",
163 "sendable stop signal not from tty",
164 "stop signal from tty",
165 "continue a stopped process",
166 "child status has changed",
167 "background read attempted from control tty",
168 "background write attempted from control tty",
169 "input record available at control tty",
170 "exceeded CPU time limit",
171 "exceeded file size limit"
175 #endif /* ! SYS_SIGLIST_DECLARED */
177 /* t means use pty, nil means use a pipe,
178 maybe other values to come. */
179 static Lisp_Object Vprocess_connection_type
;
183 #include <sys/socket.h>
187 /* Number of events of change of status of a process. */
188 static int process_tick
;
190 /* Number of events for which the user or sentinel has been notified. */
191 static int update_tick
;
194 /* We could get this from param.h, but better not to depend on finding that.
195 And better not to risk that it might define other symbols used in this
198 #define MAXDESC FD_SETSIZE
202 #define SELECT_TYPE fd_set
203 #else /* no FD_SET */
205 #define SELECT_TYPE int
207 /* Define the macros to access a single-int bitmap of descriptors. */
208 #define FD_SET(n, p) (*(p) |= (1 << (n)))
209 #define FD_CLR(n, p) (*(p) &= ~(1 << (n)))
210 #define FD_ISSET(n, p) (*(p) & (1 << (n)))
211 #define FD_ZERO(p) (*(p) = 0)
212 #endif /* no FD_SET */
214 /* Mask of bits indicating the descriptors that we wait for input on */
216 static SELECT_TYPE input_wait_mask
;
218 /* The largest descriptor currently in use for a process object. */
219 static int max_process_desc
;
221 /* Descriptor to use for keyboard input. */
222 static int keyboard_descriptor
;
224 /* Nonzero means delete a process right away if it exits. */
225 static int delete_exited_processes
;
227 /* Indexed by descriptor, gives the process (if any) for that descriptor */
228 Lisp_Object chan_process
[MAXDESC
];
230 /* Alist of elements (NAME . PROCESS) */
231 Lisp_Object Vprocess_alist
;
233 /* Buffered-ahead input char from process, indexed by channel.
234 -1 means empty (no char is buffered).
235 Used on sys V where the only way to tell if there is any
236 output from the process is to read at least one char.
237 Always -1 on systems that support FIONREAD. */
239 static int proc_buffered_char
[MAXDESC
];
241 static Lisp_Object
get_process ();
243 /* Maximum number of bytes to send to a pty without an eof. */
244 static int pty_max_bytes
;
246 /* Compute the Lisp form of the process status, p->status, from
247 the numeric status that was returned by `wait'. */
249 Lisp_Object
status_convert ();
252 struct Lisp_Process
*p
;
254 union { int i
; WAITTYPE wt
; } u
;
255 u
.i
= XFASTINT (p
->raw_status_low
) + (XFASTINT (p
->raw_status_high
) << 16);
256 p
->status
= status_convert (u
.wt
);
257 p
->raw_status_low
= Qnil
;
258 p
->raw_status_high
= Qnil
;
261 /* Convert a process status word in Unix format to
262 the list that we use internally. */
269 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
270 else if (WIFEXITED (w
))
271 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
272 WCOREDUMP (w
) ? Qt
: Qnil
));
273 else if (WIFSIGNALED (w
))
274 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
275 WCOREDUMP (w
) ? Qt
: Qnil
));
280 /* Given a status-list, extract the three pieces of information
281 and store them individually through the three pointers. */
284 decode_status (l
, symbol
, code
, coredump
)
292 if (XTYPE (l
) == Lisp_Symbol
)
300 *symbol
= XCONS (l
)->car
;
301 tem
= XCONS (l
)->cdr
;
302 *code
= XFASTINT (XCONS (tem
)->car
);
303 tem
= XCONS (tem
)->cdr
;
304 *coredump
= !NILP (tem
);
308 /* Return a string describing a process status list. */
311 status_message (status
)
316 Lisp_Object string
, string2
;
318 decode_status (status
, &symbol
, &code
, &coredump
);
320 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
326 signame
= sys_siglist
[code
];
328 signame
= sys_errlist
[code
];
333 string
= build_string (signame
);
334 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
335 XSTRING (string
)->data
[0] = DOWNCASE (XSTRING (string
)->data
[0]);
336 return concat2 (string
, string2
);
338 else if (EQ (symbol
, Qexit
))
341 return build_string ("finished\n");
342 string
= Fnumber_to_string (make_number (code
));
343 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
344 return concat2 (build_string ("exited abnormally with code "),
345 concat2 (string
, string2
));
348 return Fcopy_sequence (Fsymbol_name (symbol
));
353 /* Open an available pty, returning a file descriptor.
354 Return -1 on failure.
355 The file name of the terminal corresponding to the pty
356 is left in the variable pty_name. */
367 /* Some systems name their pseudoterminals so that there are gaps in
368 the usual sequence - for example, on HP9000/S700 systems, there
369 are no pseudoterminals with names ending in 'f'. So we wait for
370 three failures in a row before deciding that we've reached the
372 int failed_count
= 0;
377 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
378 for (i
= 0; i
< 16; i
++)
381 #ifdef PTY_NAME_SPRINTF
384 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
385 #endif /* no PTY_NAME_SPRINTF */
389 #else /* no PTY_OPEN */
391 /* Unusual IRIS code */
392 *ptyv
= open ("/dev/ptc", O_RDWR
| O_NDELAY
, 0);
395 if (fstat (fd
, &stb
) < 0)
398 if (stat (pty_name
, &stb
) < 0)
401 if (failed_count
>= 3)
407 fd
= open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
409 fd
= open (pty_name
, O_RDWR
| O_NDELAY
, 0);
411 #endif /* not IRIS */
412 #endif /* no PTY_OPEN */
416 /* check to make certain that both sides are available
417 this avoids a nasty yet stupid bug in rlogins */
418 #ifdef PTY_TTY_NAME_SPRINTF
421 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
422 #endif /* no PTY_TTY_NAME_SPRINTF */
424 if (access (pty_name
, 6) != 0)
427 #if !defined(IRIS) && !defined(__sgi)
433 #endif /* not UNIPLUS */
440 #endif /* HAVE_PTYS */
446 register Lisp_Object val
, tem
, name1
;
447 register struct Lisp_Process
*p
;
451 /* size of process structure includes the vector header,
452 so deduct for that. But struct Lisp_Vector includes the first
453 element, thus deducts too much, so add it back. */
454 val
= Fmake_vector (make_number ((sizeof (struct Lisp_Process
)
455 - sizeof (struct Lisp_Vector
)
456 + sizeof (Lisp_Object
))
457 / sizeof (Lisp_Object
)),
459 XSETTYPE (val
, Lisp_Process
);
462 XSET (p
->infd
, Lisp_Int
, -1);
463 XSET (p
->outfd
, Lisp_Int
, -1);
464 XFASTINT (p
->pid
) = 0;
465 XFASTINT (p
->tick
) = 0;
466 XFASTINT (p
->update_tick
) = 0;
467 p
->raw_status_low
= Qnil
;
468 p
->raw_status_high
= Qnil
;
470 p
->mark
= Fmake_marker ();
472 /* If name is already in use, modify it until it is unused. */
477 tem
= Fget_process (name1
);
478 if (NILP (tem
)) break;
479 sprintf (suffix
, "<%d>", i
);
480 name1
= concat2 (name
, build_string (suffix
));
484 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
488 remove_process (proc
)
489 register Lisp_Object proc
;
491 register Lisp_Object pair
;
493 pair
= Frassq (proc
, Vprocess_alist
);
494 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
495 Fset_marker (XPROCESS (proc
)->mark
, Qnil
, Qnil
);
497 deactivate_process (proc
);
500 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
501 "Return t if OBJECT is a process.")
505 return XTYPE (obj
) == Lisp_Process
? Qt
: Qnil
;
508 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
509 "Return the process named NAME, or nil if there is none.")
511 register Lisp_Object name
;
513 if (XTYPE (name
) == Lisp_Process
)
515 CHECK_STRING (name
, 0);
516 return Fcdr (Fassoc (name
, Vprocess_alist
));
519 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
520 "Return the (or, a) process associated with BUFFER.\n\
521 BUFFER may be a buffer or the name of one.")
523 register Lisp_Object name
;
525 register Lisp_Object buf
, tail
, proc
;
527 if (NILP (name
)) return Qnil
;
528 buf
= Fget_buffer (name
);
529 if (NILP (buf
)) return Qnil
;
531 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
533 proc
= Fcdr (Fcar (tail
));
534 if (XTYPE (proc
) == Lisp_Process
&& EQ (XPROCESS (proc
)->buffer
, buf
))
540 /* This is how commands for the user decode process arguments. It
541 accepts a process, a process name, a buffer, a buffer name, or nil.
542 Buffers denote the first process in the buffer, and nil denotes the
547 register Lisp_Object name
;
549 register Lisp_Object proc
, obj
;
552 obj
= Fget_process (name
);
554 obj
= Fget_buffer (name
);
556 error ("Process %s does not exist", XSTRING (name
)->data
);
558 else if (NILP (name
))
559 obj
= Fcurrent_buffer ();
563 /* Now obj should be either a buffer object or a process object.
567 proc
= Fget_buffer_process (obj
);
569 error ("Buffer %s has no process", XSTRING (XBUFFER (obj
)->name
)->data
);
573 CHECK_PROCESS (obj
, 0);
579 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
580 "Delete PROCESS: kill it and forget about it immediately.\n\
581 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
582 nil, indicating the current buffer's process.")
584 register Lisp_Object proc
;
586 proc
= get_process (proc
);
587 XPROCESS (proc
)->raw_status_low
= Qnil
;
588 XPROCESS (proc
)->raw_status_high
= Qnil
;
589 if (NETCONN_P (proc
))
591 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
592 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
594 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
596 Fkill_process (proc
, Qnil
);
597 /* Do this now, since remove_process will make sigchld_handler do nothing. */
598 XPROCESS (proc
)->status
599 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
600 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
603 remove_process (proc
);
607 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
608 "Return the status of PROCESS: a symbol, one of these:\n\
609 run -- for a process that is running.\n\
610 stop -- for a process stopped but continuable.\n\
611 exit -- for a process that has exited.\n\
612 signal -- for a process that has got a fatal signal.\n\
613 open -- for a network stream connection that is open.\n\
614 closed -- for a network stream connection that is closed.\n\
615 nil -- if arg is a process name and no such process exists.\n\
616 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
617 nil, indicating the current buffer's process.")
619 register Lisp_Object proc
;
621 register struct Lisp_Process
*p
;
622 register Lisp_Object status
;
623 proc
= get_process (proc
);
627 if (!NILP (p
->raw_status_low
))
630 if (XTYPE (status
) == Lisp_Cons
)
631 status
= XCONS (status
)->car
;
632 if (NETCONN_P (proc
))
634 if (EQ (status
, Qrun
))
636 else if (EQ (status
, Qexit
))
642 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
644 "Return the exit status of PROCESS or the signal number that killed it.\n\
645 If PROCESS has not yet exited or died, return 0.")
647 register Lisp_Object proc
;
649 CHECK_PROCESS (proc
, 0);
650 if (!NILP (XPROCESS (proc
)->raw_status_low
))
651 update_status (XPROCESS (proc
));
652 if (XTYPE (XPROCESS (proc
)->status
) == Lisp_Cons
)
653 return XCONS (XCONS (XPROCESS (proc
)->status
)->cdr
)->car
;
654 return make_number (0);
657 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
658 "Return the process id of PROCESS.\n\
659 This is the pid of the Unix process which PROCESS uses or talks to.\n\
660 For a network connection, this value is nil.")
662 register Lisp_Object proc
;
664 CHECK_PROCESS (proc
, 0);
665 return XPROCESS (proc
)->pid
;
668 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
669 "Return the name of PROCESS, as a string.\n\
670 This is the name of the program invoked in PROCESS,\n\
671 possibly modified to make it unique among process names.")
673 register Lisp_Object proc
;
675 CHECK_PROCESS (proc
, 0);
676 return XPROCESS (proc
)->name
;
679 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
680 "Return the command that was executed to start PROCESS.\n\
681 This is a list of strings, the first string being the program executed\n\
682 and the rest of the strings being the arguments given to it.\n\
683 For a non-child channel, this is nil.")
685 register Lisp_Object proc
;
687 CHECK_PROCESS (proc
, 0);
688 return XPROCESS (proc
)->command
;
691 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
693 "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).")
695 register Lisp_Object proc
, buffer
;
697 CHECK_PROCESS (proc
, 0);
699 CHECK_BUFFER (buffer
, 1);
700 XPROCESS (proc
)->buffer
= buffer
;
704 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
706 "Return the buffer PROCESS is associated with.\n\
707 Output from PROCESS is inserted in this buffer\n\
708 unless PROCESS has a filter.")
710 register Lisp_Object proc
;
712 CHECK_PROCESS (proc
, 0);
713 return XPROCESS (proc
)->buffer
;
716 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
718 "Return the marker for the end of the last output from PROCESS.")
720 register Lisp_Object proc
;
722 CHECK_PROCESS (proc
, 0);
723 return XPROCESS (proc
)->mark
;
726 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
728 "Give PROCESS the filter function FILTER; nil means no filter.\n\
729 t means stop accepting output from the process.\n\
730 When a process has a filter, each time it does output\n\
731 the entire string of output is passed to the filter.\n\
732 The filter gets two arguments: the process and the string of output.\n\
733 If the process has a filter, its buffer is not used for output.")
735 register Lisp_Object proc
, filter
;
737 CHECK_PROCESS (proc
, 0);
739 FD_CLR (XINT (XPROCESS (proc
)->infd
), &input_wait_mask
);
740 else if (EQ (XPROCESS (proc
)->filter
, Qt
))
741 FD_SET (XINT (XPROCESS (proc
)->infd
), &input_wait_mask
);
742 XPROCESS (proc
)->filter
= filter
;
746 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
748 "Returns the filter function of PROCESS; nil if none.\n\
749 See `set-process-filter' for more info on filter functions.")
751 register Lisp_Object proc
;
753 CHECK_PROCESS (proc
, 0);
754 return XPROCESS (proc
)->filter
;
757 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
759 "Give PROCESS the sentinel SENTINEL; nil for none.\n\
760 The sentinel is called as a function when the process changes state.\n\
761 It gets two arguments: the process, and a string describing the change.")
763 register Lisp_Object proc
, sentinel
;
765 CHECK_PROCESS (proc
, 0);
766 XPROCESS (proc
)->sentinel
= sentinel
;
770 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
772 "Return the sentinel of PROCESS; nil if none.\n\
773 See `set-process-sentinel' for more info on sentinels.")
775 register Lisp_Object proc
;
777 CHECK_PROCESS (proc
, 0);
778 return XPROCESS (proc
)->sentinel
;
781 DEFUN ("set-process-window-size", Fset_process_window_size
,
782 Sset_process_window_size
, 3, 3, 0,
783 "Tell PROCESS that it has logical window size HEIGHT and WIDTH.")
784 (proc
, height
, width
)
785 register Lisp_Object proc
, height
, width
;
787 CHECK_PROCESS (proc
, 0);
788 CHECK_NATNUM (height
, 0);
789 CHECK_NATNUM (width
, 0);
790 if (set_window_size (XINT (XPROCESS (proc
)->infd
),
791 XINT (height
), XINT(width
)) <= 0)
797 DEFUN ("process-kill-without-query", Fprocess_kill_without_query
,
798 Sprocess_kill_without_query
, 1, 2, 0,
799 "Say no query needed if PROCESS is running when Emacs is exited.\n\
800 Optional second argument if non-nil says to require a query.\n\
801 Value is t if a query was formerly required.")
803 register Lisp_Object proc
, value
;
807 CHECK_PROCESS (proc
, 0);
808 tem
= XPROCESS (proc
)->kill_without_query
;
809 XPROCESS (proc
)->kill_without_query
= Fnull (value
);
814 #if 0 /* Turned off because we don't currently record this info
815 in the process. Perhaps add it. */
816 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
817 "Return the connection type of `PROCESS'.\n\
818 The value is `nil' for a pipe,\n\
819 `t' or `pty' for a pty, or `stream' for a socket connection.")
823 return XPROCESS (process
)->type
;
830 register Lisp_Object tail
, tem
;
831 Lisp_Object proc
, minspace
, tem1
;
832 register struct buffer
*old
= current_buffer
;
833 register struct Lisp_Process
*p
;
837 XFASTINT (minspace
) = 1;
839 set_buffer_internal (XBUFFER (Vstandard_output
));
840 Fbuffer_disable_undo (Vstandard_output
);
842 current_buffer
->truncate_lines
= Qt
;
845 Proc Status Buffer Command\n\
846 ---- ------ ------ -------\n", -1);
848 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
852 proc
= Fcdr (Fcar (tail
));
854 if (NILP (p
->childp
))
857 Finsert (1, &p
->name
);
858 Findent_to (make_number (13), minspace
);
860 if (!NILP (p
->raw_status_low
))
863 if (XTYPE (p
->status
) == Lisp_Cons
)
864 symbol
= XCONS (p
->status
)->car
;
867 if (EQ (symbol
, Qsignal
))
870 tem
= Fcar (Fcdr (p
->status
));
872 if (XINT (tem
) < NSIG
)
873 write_string (sys_errlist
[XINT (tem
)], -1);
876 Fprinc (symbol
, Qnil
);
878 else if (NETCONN_P (proc
))
880 if (EQ (symbol
, Qrun
))
881 write_string ("open", -1);
882 else if (EQ (symbol
, Qexit
))
883 write_string ("closed", -1);
885 Fprinc (symbol
, Qnil
);
888 Fprinc (symbol
, Qnil
);
890 if (EQ (symbol
, Qexit
))
893 tem
= Fcar (Fcdr (p
->status
));
896 sprintf (tembuf
, " %d", XFASTINT (tem
));
897 write_string (tembuf
, -1);
901 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
902 remove_process (proc
);
904 Findent_to (make_number (22), minspace
);
905 if (NILP (p
->buffer
))
906 insert_string ("(none)");
907 else if (NILP (XBUFFER (p
->buffer
)->name
))
908 insert_string ("(Killed)");
910 Finsert (1, &XBUFFER (p
->buffer
)->name
);
912 Findent_to (make_number (37), minspace
);
914 if (NETCONN_P (proc
))
916 sprintf (tembuf
, "(network stream connection to %s)\n",
917 XSTRING (p
->childp
)->data
);
918 insert_string (tembuf
);
932 insert_string ("\n");
938 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 0, "",
939 "Display a list of all processes.\n\
940 \(Any processes listed as Exited or Signaled are actually eliminated\n\
941 after the listing is made.)")
944 internal_with_output_to_temp_buffer ("*Process List*",
945 list_processes_1
, Qnil
);
949 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
950 "Return a list of all processes.")
953 return Fmapcar (Qcdr
, Vprocess_alist
);
956 /* Starting asynchronous inferior processes. */
958 static Lisp_Object
start_process_unwind ();
960 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
961 "Start a program in a subprocess. Return the process object for it.\n\
962 Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\
963 NAME is name for process. It is modified if necessary to make it unique.\n\
964 BUFFER is the buffer or (buffer-name) to associate with the process.\n\
965 Process output goes at end of that buffer, unless you specify\n\
966 an output stream or filter function to handle the output.\n\
967 BUFFER may be also nil, meaning that this process is not associated\n\
969 Third arg is program file name. It is searched for as in the shell.\n\
970 Remaining arguments are strings to give program as arguments.")
973 register Lisp_Object
*args
;
975 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
977 register unsigned char *new_argv
;
980 register unsigned char **new_argv
;
983 int count
= specpdl_ptr
- specpdl
;
987 buffer
= Fget_buffer_create (buffer
);
989 /* Make sure that the child will be able to chdir to the current
990 buffer's current directory, or its unhandled equivalent. We
991 can't just have the child check for an error when it does the
992 chdir, since it's in a vfork.
994 We have to GCPRO around this because Fexpand_file_name and
995 Funhandled_file_name_directory might call a file name handling
996 function. The argument list is protected by the caller, so all
997 we really have to worry about is buffer. */
999 struct gcpro gcpro1
, gcpro2
;
1001 current_dir
= current_buffer
->directory
;
1003 GCPRO2 (buffer
, current_dir
);
1006 expand_and_dir_to_file
1007 (Funhandled_file_name_directory (current_dir
), Qnil
);
1008 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1009 report_file_error ("Setting current directory",
1010 Fcons (current_buffer
->directory
, Qnil
));
1016 CHECK_STRING (name
, 0);
1020 CHECK_STRING (program
, 2);
1023 /* Make a one member argv with all args concatenated
1024 together separated by a blank. */
1025 len
= XSTRING (program
)->size
+ 2;
1026 for (i
= 3; i
< nargs
; i
++)
1029 CHECK_STRING (tem
, i
);
1030 len
+= XSTRING (tem
)->size
+ 1; /* count the blank */
1032 new_argv
= (unsigned char *) alloca (len
);
1033 strcpy (new_argv
, XSTRING (program
)->data
);
1034 for (i
= 3; i
< nargs
; i
++)
1037 CHECK_STRING (tem
, i
);
1038 strcat (new_argv
, " ");
1039 strcat (new_argv
, XSTRING (tem
)->data
);
1041 /* Need to add code here to check for program existence on VMS */
1044 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1046 /* If program file name is not absolute, search our path for it */
1047 if (XSTRING (program
)->data
[0] != '/')
1049 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1052 GCPRO4 (name
, program
, buffer
, current_dir
);
1053 openp (Vexec_path
, program
, EXEC_SUFFIXES
, &tem
, 1);
1056 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1057 new_argv
[0] = XSTRING (tem
)->data
;
1060 new_argv
[0] = XSTRING (program
)->data
;
1062 for (i
= 3; i
< nargs
; i
++)
1065 CHECK_STRING (tem
, i
);
1066 new_argv
[i
- 2] = XSTRING (tem
)->data
;
1068 new_argv
[i
- 2] = 0;
1069 #endif /* not VMS */
1071 proc
= make_process (name
);
1072 /* If an error occurs and we can't start the process, we want to
1073 remove it from the process list. This means that each error
1074 check in create_process doesn't need to call remove_process
1075 itself; it's all taken care of here. */
1076 record_unwind_protect (start_process_unwind
, proc
);
1078 XPROCESS (proc
)->childp
= Qt
;
1079 XPROCESS (proc
)->command_channel_p
= Qnil
;
1080 XPROCESS (proc
)->buffer
= buffer
;
1081 XPROCESS (proc
)->sentinel
= Qnil
;
1082 XPROCESS (proc
)->filter
= Qnil
;
1083 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1085 create_process (proc
, new_argv
, current_dir
);
1087 return unbind_to (count
, proc
);
1090 /* This function is the unwind_protect form for Fstart_process. If
1091 PROC doesn't have its pid set, then we know someone has signalled
1092 an error and the process wasn't started successfully, so we should
1093 remove it from the process list. */
1095 start_process_unwind (proc
)
1098 if (XTYPE (proc
) != Lisp_Process
)
1101 /* Was PROC started successfully? */
1102 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1103 remove_process (proc
);
1110 create_process_1 (signo
)
1114 /* USG systems forget handlers when they are used;
1115 must reestablish each time */
1116 signal (signo
, create_process_1
);
1120 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1123 /* Mimic blocking of signals on system V, which doesn't really have it. */
1125 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1126 int sigchld_deferred
;
1129 create_process_sigchld ()
1131 signal (SIGCHLD
, create_process_sigchld
);
1133 sigchld_deferred
= 1;
1139 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1140 create_process (process
, new_argv
, current_dir
)
1141 Lisp_Object process
;
1143 Lisp_Object current_dir
;
1145 int pid
, inchannel
, outchannel
, forkin
, forkout
;
1148 SIGTYPE (*sigchld
)();
1151 extern char **environ
;
1153 inchannel
= outchannel
= -1;
1156 if (EQ (Vprocess_connection_type
, Qt
))
1157 outchannel
= inchannel
= allocate_pty ();
1162 /* On USG systems it does not work to open the pty's tty here
1163 and then close and reopen it in the child. */
1165 /* Don't let this terminal become our controlling terminal
1166 (in case we don't have one). */
1167 forkout
= forkin
= open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1169 forkout
= forkin
= open (pty_name
, O_RDWR
, 0);
1172 report_file_error ("Opening pty", Qnil
);
1174 forkin
= forkout
= -1;
1175 #endif /* not USG */
1179 #endif /* HAVE_PTYS */
1182 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1183 report_file_error ("Opening socketpair", Qnil
);
1184 outchannel
= inchannel
= sv
[0];
1185 forkout
= forkin
= sv
[1];
1187 #else /* not SKTPAIR */
1196 #endif /* not SKTPAIR */
1199 /* Replaced by close_process_descs */
1200 set_exclusive_use (inchannel
);
1201 set_exclusive_use (outchannel
);
1204 /* Stride people say it's a mystery why this is needed
1205 as well as the O_NDELAY, but that it fails without this. */
1206 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1209 ioctl (inchannel
, FIONBIO
, &one
);
1214 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1217 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1221 /* Record this as an active process, with its channels.
1222 As a result, child_setup will close Emacs's side of the pipes. */
1223 chan_process
[inchannel
] = process
;
1224 XSET (XPROCESS (process
)->infd
, Lisp_Int
, inchannel
);
1225 XSET (XPROCESS (process
)->outfd
, Lisp_Int
, outchannel
);
1226 /* Record the tty descriptor used in the subprocess. */
1228 XPROCESS (process
)->subtty
= Qnil
;
1230 XFASTINT (XPROCESS (process
)->subtty
) = forkin
;
1231 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1232 XPROCESS (process
)->status
= Qrun
;
1234 /* Delay interrupts until we have a chance to store
1235 the new fork's pid in its process structure */
1239 #else /* not BSD4_1 */
1240 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1241 sigsetmask (sigmask (SIGCHLD
));
1242 #else /* ordinary USG */
1244 sigchld_deferred
= 0;
1245 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1247 #endif /* ordinary USG */
1248 #endif /* not BSD4_1 */
1249 #endif /* SIGCHLD */
1251 /* Until we store the proper pid, enable sigchld_handler
1252 to recognize an unknown pid as standing for this process.
1253 It is very important not to let this `marker' value stay
1254 in the table after this function has returned; if it does
1255 it might cause call-process to hang and subsequent asynchronous
1256 processes to get their return values scrambled. */
1257 XSETINT (XPROCESS (process
)->pid
, -1);
1260 /* child_setup must clobber environ on systems with true vfork.
1261 Protect it from permanent change. */
1262 char **save_environ
= environ
;
1267 int xforkin
= forkin
;
1268 int xforkout
= forkout
;
1270 #if 0 /* This was probably a mistake--it duplicates code later on,
1271 but fails to handle all the cases. */
1272 /* Make sure SIGCHLD is not blocked in the child. */
1273 sigsetmask (SIGEMPTYMASK
);
1276 /* Make the pty be the controlling terminal of the process. */
1278 /* First, disconnect its current controlling terminal. */
1280 /* We tried doing setsid only if pty_flag, but it caused
1281 process_set_signal to fail on SGI when using a pipe. */
1283 /* Make the pty's terminal the controlling terminal. */
1287 /* We ignore the return value
1288 because faith@cs.unc.edu says that is necessary on Linux. */
1289 ioctl (xforkin
, TIOCSCTTY
, 0);
1292 #else /* not HAVE_SETSID */
1294 /* It's very important to call setpgrp here and no time
1295 afterwards. Otherwise, we lose our controlling tty which
1296 is set when we open the pty. */
1299 #endif /* not HAVE_SETSID */
1300 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1301 if (pty_flag
&& xforkin
>= 0)
1304 tcgetattr (xforkin
, &t
);
1306 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1307 write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1310 #if defined (NTTYDISC) && defined (TIOCSETD)
1311 if (pty_flag
&& xforkin
>= 0)
1313 /* Use new line discipline. */
1314 int ldisc
= NTTYDISC
;
1315 if (ioctl (xforkin
, TIOCSETD
, &ldisc
) < 0)
1316 write (1, "create_process/TIOCSETD failed\n", 31);
1321 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1322 can do TIOCSPGRP only to the process's controlling tty. */
1325 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1326 I can't test it since I don't have 4.3. */
1327 int j
= open ("/dev/tty", O_RDWR
, 0);
1328 ioctl (j
, TIOCNOTTY
, 0);
1331 /* In order to get a controlling terminal on some versions
1332 of BSD, it is necessary to put the process in pgrp 0
1333 before it opens the terminal. */
1337 #endif /* TIOCNOTTY */
1339 #if !defined (RTU) && !defined (UNIPLUS)
1340 /*** There is a suggestion that this ought to be a
1341 conditional on TIOCSPGRP. */
1342 /* Now close the pty (if we had it open) and reopen it.
1343 This makes the pty the controlling terminal of the subprocess. */
1346 #ifdef SET_CHILD_PTY_PGRP
1347 int pgrp
= getpid ();
1350 /* I wonder if close (open (pty_name, ...)) would work? */
1353 xforkout
= xforkin
= open (pty_name
, O_RDWR
, 0);
1355 #ifdef SET_CHILD_PTY_PGRP
1356 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1357 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1363 #endif /* not UNIPLUS and not RTU */
1364 #ifdef SETUP_SLAVE_PTY
1369 #endif /* SETUP_SLAVE_PTY */
1371 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1372 Now reenable it in the child, so it will die when we want it to. */
1374 signal (SIGHUP
, SIG_DFL
);
1376 #endif /* HAVE_PTYS */
1381 #else /* not BSD4_1 */
1382 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1383 sigsetmask (SIGEMPTYMASK
);
1384 #else /* ordinary USG */
1386 signal (SIGCHLD
, sigchld
);
1388 #endif /* ordinary USG */
1389 #endif /* not BSD4_1 */
1390 #endif /* SIGCHLD */
1393 child_setup_tty (xforkout
);
1394 child_setup (xforkin
, xforkout
, xforkout
,
1395 new_argv
, 1, current_dir
);
1397 environ
= save_environ
;
1404 if (forkin
!= forkout
&& forkout
>= 0)
1406 report_file_error ("Doing vfork", Qnil
);
1409 XFASTINT (XPROCESS (process
)->pid
) = pid
;
1411 FD_SET (inchannel
, &input_wait_mask
);
1412 if (inchannel
> max_process_desc
)
1413 max_process_desc
= inchannel
;
1415 /* If the subfork execv fails, and it exits,
1416 this close hangs. I don't know why.
1417 So have an interrupt jar it loose. */
1419 signal (SIGALRM
, create_process_1
);
1421 XPROCESS (process
)->subtty
= Qnil
;
1426 if (forkin
!= forkout
&& forkout
>= 0)
1432 #else /* not BSD4_1 */
1433 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1434 sigsetmask (SIGEMPTYMASK
);
1435 #else /* ordinary USG */
1437 signal (SIGCHLD
, sigchld
);
1438 /* Now really handle any of these signals
1439 that came in during this function. */
1440 if (sigchld_deferred
)
1441 kill (getpid (), SIGCHLD
);
1443 #endif /* ordinary USG */
1444 #endif /* not BSD4_1 */
1445 #endif /* SIGCHLD */
1447 #endif /* not VMS */
1451 /* open a TCP network connection to a given HOST/SERVICE. Treated
1452 exactly like a normal process when reading and writing. Only
1453 differences are in status display and process deletion. A network
1454 connection has no PID; you cannot signal it. All you can do is
1455 deactivate and close it via delete-process */
1457 DEFUN ("open-network-stream", Fopen_network_stream
, Sopen_network_stream
,
1459 "Open a TCP connection for a service to a host.\n\
1460 Returns a subprocess-object to represent the connection.\n\
1461 Input and output work as for subprocesses; `delete-process' closes it.\n\
1462 Args are NAME BUFFER HOST SERVICE.\n\
1463 NAME is name for process. It is modified if necessary to make it unique.\n\
1464 BUFFER is the buffer (or buffer-name) to associate with the process.\n\
1465 Process output goes at end of that buffer, unless you specify\n\
1466 an output stream or filter function to handle the output.\n\
1467 BUFFER may be also nil, meaning that this process is not associated\n\
1469 Third arg is name of the host to connect to, or its IP address.\n\
1470 Fourth arg SERVICE is name of the service desired, or an integer\n\
1471 specifying a port number to connect to.")
1472 (name
, buffer
, host
, service
)
1473 Lisp_Object name
, buffer
, host
, service
;
1477 struct sockaddr_in address
;
1478 struct servent
*svc_info
;
1479 struct hostent
*host_info_ptr
, host_info
;
1480 char *(addr_list
[2]);
1481 IN_ADDR numeric_addr
;
1485 struct hostent host_info_fixed
;
1486 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1489 GCPRO4 (name
, buffer
, host
, service
);
1490 CHECK_STRING (name
, 0);
1491 CHECK_STRING (host
, 0);
1492 if (XTYPE(service
) == Lisp_Int
)
1493 port
= htons ((unsigned short) XINT (service
));
1496 CHECK_STRING (service
, 0);
1497 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
1499 error ("Unknown service \"%s\"", XSTRING (service
)->data
);
1500 port
= svc_info
->s_port
;
1504 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
1505 if (host_info_ptr
== 0)
1506 /* Attempt to interpret host as numeric inet address */
1508 numeric_addr
= inet_addr ((char *) XSTRING (host
)->data
);
1509 if (NUMERIC_ADDR_ERROR
)
1510 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
1512 host_info_ptr
= &host_info
;
1513 host_info
.h_name
= 0;
1514 host_info
.h_aliases
= 0;
1515 host_info
.h_addrtype
= AF_INET
;
1517 /* Older machines have only one address slot called h_addr.
1518 Newer machines have h_addr_list, but #define h_addr to
1519 be its first element. */
1520 host_info
.h_addr_list
= &(addr_list
[0]);
1522 host_info
.h_addr
= (char*)(&numeric_addr
);
1524 host_info
.h_length
= strlen (addr_list
[0]);
1527 bzero (&address
, sizeof address
);
1528 bcopy (host_info_ptr
->h_addr
, (char *) &address
.sin_addr
,
1529 host_info_ptr
->h_length
);
1530 address
.sin_family
= host_info_ptr
->h_addrtype
;
1531 address
.sin_port
= port
;
1533 s
= socket (host_info_ptr
->h_addrtype
, SOCK_STREAM
, 0);
1535 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1537 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
1538 when connect is interrupted. So let's not let it get interrupted.
1539 Note we do not turn off polling, because polling is only used
1540 when not interrupt_input, and thus not normally used on the systems
1541 which have this bug. On systems which use polling, there's no way
1542 to quit if polling is turned off. */
1543 if (interrupt_input
)
1547 if (connect (s
, (struct sockaddr
*) &address
, sizeof address
) == -1
1548 && errno
!= EISCONN
)
1554 if (errno
== EADDRINUSE
&& retry
< 20)
1562 if (interrupt_input
)
1566 report_file_error ("connection failed",
1567 Fcons (host
, Fcons (name
, Qnil
)));
1570 if (interrupt_input
)
1574 s
= connect_server (0);
1576 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1577 send_command (s
, C_PORT
, 0, "%s:%d", XSTRING (host
)->data
, ntohs (port
));
1578 send_command (s
, C_DUMB
, 1, 0);
1584 report_file_error ("error duplicating socket", Fcons (name
, Qnil
));
1587 buffer
= Fget_buffer_create (buffer
);
1588 proc
= make_process (name
);
1590 chan_process
[inch
] = proc
;
1593 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
1596 fcntl (inch
, F_SETFL
, O_NDELAY
);
1600 XPROCESS (proc
)->childp
= host
;
1601 XPROCESS (proc
)->command_channel_p
= Qnil
;
1602 XPROCESS (proc
)->buffer
= buffer
;
1603 XPROCESS (proc
)->sentinel
= Qnil
;
1604 XPROCESS (proc
)->filter
= Qnil
;
1605 XPROCESS (proc
)->command
= Qnil
;
1606 XPROCESS (proc
)->pid
= Qnil
;
1607 XSET (XPROCESS (proc
)->infd
, Lisp_Int
, s
);
1608 XSET (XPROCESS (proc
)->outfd
, Lisp_Int
, outch
);
1609 XPROCESS (proc
)->status
= Qrun
;
1610 FD_SET (inch
, &input_wait_mask
);
1611 if (inch
> max_process_desc
)
1612 max_process_desc
= inch
;
1617 #endif /* HAVE_SOCKETS */
1619 deactivate_process (proc
)
1622 register int inchannel
, outchannel
;
1623 register struct Lisp_Process
*p
= XPROCESS (proc
);
1625 inchannel
= XINT (p
->infd
);
1626 outchannel
= XINT (p
->outfd
);
1630 /* Beware SIGCHLD hereabouts. */
1631 flush_pending_output (inchannel
);
1634 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
1635 sys$
dassgn (outchannel
);
1636 vs
= get_vms_process_pointer (p
->pid
);
1638 give_back_vms_process_stuff (vs
);
1642 if (outchannel
>= 0 && outchannel
!= inchannel
)
1646 XSET (p
->infd
, Lisp_Int
, -1);
1647 XSET (p
->outfd
, Lisp_Int
, -1);
1648 chan_process
[inchannel
] = Qnil
;
1649 FD_CLR (inchannel
, &input_wait_mask
);
1650 if (inchannel
== max_process_desc
)
1653 /* We just closed the highest-numbered process input descriptor,
1654 so recompute the highest-numbered one now. */
1655 max_process_desc
= 0;
1656 for (i
= 0; i
< MAXDESC
; i
++)
1657 if (!NILP (chan_process
[i
]))
1658 max_process_desc
= i
;
1663 /* Close all descriptors currently in use for communication
1664 with subprocess. This is used in a newly-forked subprocess
1665 to get rid of irrelevant descriptors. */
1667 close_process_descs ()
1670 for (i
= 0; i
< MAXDESC
; i
++)
1672 Lisp_Object process
;
1673 process
= chan_process
[i
];
1674 if (!NILP (process
))
1676 int in
= XINT (XPROCESS (process
)->infd
);
1677 int out
= XINT (XPROCESS (process
)->outfd
);
1680 if (out
>= 0 && in
!= out
)
1686 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
1688 "Allow any pending output from subprocesses to be read by Emacs.\n\
1689 It is read into the process' buffers or given to their filter functions.\n\
1690 Non-nil arg PROCESS means do not return until some output has been received\n\
1692 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
1693 seconds and microseconds to wait; return after that much time whether\n\
1694 or not there is input.\n\
1695 Return non-nil iff we received any output before the timeout expired.")
1696 (proc
, timeout
, timeout_msecs
)
1697 register Lisp_Object proc
, timeout
, timeout_msecs
;
1702 if (! NILP (timeout_msecs
))
1704 CHECK_NUMBER (timeout_msecs
, 2);
1705 useconds
= XINT (timeout_msecs
);
1706 if (XTYPE (timeout
) != Lisp_Int
)
1707 XSET (timeout
, Lisp_Int
, 0);
1710 int carry
= useconds
/ 1000000;
1712 XSETINT (timeout
, XINT (timeout
) + carry
);
1713 useconds
-= carry
* 1000000;
1715 /* I think this clause is necessary because C doesn't
1716 guarantee a particular rounding direction for negative
1720 XSETINT (timeout
, XINT (timeout
) - 1);
1721 useconds
+= 1000000;
1728 if (! NILP (timeout
))
1730 CHECK_NUMBER (timeout
, 1);
1731 seconds
= XINT (timeout
);
1744 XFASTINT (proc
) = 0;
1747 (wait_reading_process_input (seconds
, useconds
, proc
, 0)
1751 /* This variable is different from waiting_for_input in keyboard.c.
1752 It is used to communicate to a lisp process-filter/sentinel (via the
1753 function Fwaiting_for_user_input_p below) whether emacs was waiting
1754 for user-input when that process-filter was called.
1755 waiting_for_input cannot be used as that is by definition 0 when
1756 lisp code is being evalled */
1757 static int waiting_for_user_input_p
;
1759 /* Read and dispose of subprocess output while waiting for timeout to
1760 elapse and/or keyboard input to be available.
1763 timeout in seconds, or
1764 zero for no limit, or
1765 -1 means gobble data immediately available but don't wait for any.
1768 an additional duration to wait, measured in microseconds.
1769 If this is nonzero and time_limit is 0, then the timeout
1770 consists of MICROSECS only.
1772 READ_KBD is a lisp value:
1773 0 to ignore keyboard input, or
1774 1 to return when input is available, or
1775 -1 meaning caller will actually read the input, so don't throw to
1776 the quit handler, or
1777 a cons cell, meaning wait until its car is non-nil
1778 (and gobble terminal input into the buffer if any arrives), or
1779 a process object, meaning wait until something arrives from that
1780 process. The return value is true iff we read some input from
1783 DO_DISPLAY != 0 means redisplay should be done to show subprocess
1784 output that arrives.
1786 If READ_KBD is a pointer to a struct Lisp_Process, then the
1787 function returns true iff we received input from that process
1788 before the timeout elapsed.
1789 Otherwise, return true iff we received input from any process. */
1791 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
1792 int time_limit
, microsecs
;
1793 Lisp_Object read_kbd
;
1796 register int channel
, nfds
, m
;
1797 static SELECT_TYPE Available
;
1800 EMACS_TIME timeout
, end_time
, garbage
;
1802 int wait_channel
= -1;
1803 struct Lisp_Process
*wait_proc
= 0;
1804 int got_some_input
= 0;
1805 Lisp_Object
*wait_for_cell
= 0;
1807 FD_ZERO (&Available
);
1809 /* If read_kbd is a process to watch, set wait_proc and wait_channel
1811 if (XTYPE (read_kbd
) == Lisp_Process
)
1813 wait_proc
= XPROCESS (read_kbd
);
1814 wait_channel
= XINT (wait_proc
->infd
);
1815 XFASTINT (read_kbd
) = 0;
1818 /* If waiting for non-nil in a cell, record where. */
1819 if (XTYPE (read_kbd
) == Lisp_Cons
)
1821 wait_for_cell
= &XCONS (read_kbd
)->car
;
1822 XFASTINT (read_kbd
) = 0;
1825 waiting_for_user_input_p
= XINT (read_kbd
);
1827 /* Since we may need to wait several times,
1828 compute the absolute time to return at. */
1829 if (time_limit
|| microsecs
)
1831 EMACS_GET_TIME (end_time
);
1832 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
1833 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
1836 /* It would not be safe to call this below,
1837 where we call redisplay_preserve_echo_area. */
1838 if (do_display
&& frame_garbaged
)
1839 prepare_menu_bars ();
1843 /* If calling from keyboard input, do not quit
1844 since we want to return C-g as an input character.
1845 Otherwise, do pending quit if requested. */
1846 if (XINT (read_kbd
) >= 0)
1849 /* Exit now if the cell we're waiting for became non-nil. */
1850 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
1853 /* Compute time from now till when time limit is up */
1854 /* Exit if already run out */
1855 if (time_limit
== -1)
1857 /* -1 specified for timeout means
1858 gobble output available now
1859 but don't wait at all. */
1861 EMACS_SET_SECS_USECS (timeout
, 0, 0);
1863 else if (time_limit
|| microsecs
)
1865 EMACS_GET_TIME (timeout
);
1866 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
1867 if (EMACS_TIME_NEG_P (timeout
))
1872 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
1875 /* Cause C-g and alarm signals to take immediate action,
1876 and cause input available signals to zero out timeout.
1878 It is important that we do this before checking for process
1879 activity. If we get a SIGCHLD after the explicit checks for
1880 process activity, timeout is the only way we will know. */
1881 if (XINT (read_kbd
) < 0)
1882 set_waiting_for_input (&timeout
);
1884 /* If status of something has changed, and no input is
1885 available, notify the user of the change right away. After
1886 this explicit check, we'll let the SIGCHLD handler zap
1887 timeout to get our attention. */
1888 if (update_tick
!= process_tick
&& do_display
)
1890 Atemp
= input_wait_mask
;
1891 EMACS_SET_SECS_USECS (timeout
, 0, 0);
1892 if (select (MAXDESC
, &Atemp
, 0, 0, &timeout
) <= 0)
1894 /* It's okay for us to do this and then continue with
1895 the loop, since timeout has already been zeroed out. */
1896 clear_waiting_for_input ();
1901 /* Don't wait for output from a non-running process. */
1902 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
1903 update_status (wait_proc
);
1905 && ! EQ (wait_proc
->status
, Qrun
))
1907 clear_waiting_for_input ();
1911 /* Wait till there is something to do */
1913 Available
= input_wait_mask
;
1914 /* We used to have && wait_for_cell == 0
1915 but that led to lossage handling selection_request events:
1916 within one, we would start to handle another. */
1917 if (! XINT (read_kbd
))
1918 FD_CLR (keyboard_descriptor
, &Available
);
1920 /* If frame size has changed or the window is newly mapped,
1921 redisplay now, before we start to wait. There is a race
1922 condition here; if a SIGIO arrives between now and the select
1923 and indicates that a frame is trashed, the select may block
1924 displaying a trashed screen. */
1925 if (frame_garbaged
&& do_display
)
1926 redisplay_preserve_echo_area ();
1928 if (XINT (read_kbd
) && detect_input_pending ())
1931 FD_ZERO (&Available
);
1934 nfds
= select (MAXDESC
, &Available
, 0, 0, &timeout
);
1938 /* Make C-g and alarm signals set flags again */
1939 clear_waiting_for_input ();
1941 /* If we woke up due to SIGWINCH, actually change size now. */
1942 do_pending_window_change ();
1944 if (time_limit
&& nfds
== 0) /* timeout elapsed */
1948 if (xerrno
== EINTR
)
1949 FD_ZERO (&Available
);
1951 /* Ultrix select seems to return ENOMEM when it is
1952 interrupted. Treat it just like EINTR. Bleah. Note
1953 that we want to test for the "ultrix" CPP symbol, not
1954 "__ultrix__"; the latter is only defined under GCC, but
1955 not by DEC's bundled CC. -JimB */
1956 else if (xerrno
== ENOMEM
)
1957 FD_ZERO (&Available
);
1960 /* This happens for no known reason on ALLIANT.
1961 I am guessing that this is the right response. -- RMS. */
1962 else if (xerrno
== EFAULT
)
1963 FD_ZERO (&Available
);
1965 else if (xerrno
== EBADF
)
1968 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
1969 the child's closure of the pts gives the parent a SIGHUP, and
1970 the ptc file descriptor is automatically closed,
1971 yielding EBADF here or at select() call above.
1972 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
1973 in m/ibmrt-aix.h), and here we just ignore the select error.
1974 Cleanup occurs c/o status_notify after SIGCLD. */
1975 FD_ZERO (&Available
); /* Cannot depend on values returned */
1981 error("select error: %s", strerror (xerrno
));
1983 #if defined(sun) && !defined(USG5_4)
1984 else if (nfds
> 0 && FD_ISSET (keyboard_descriptor
, &Available
)
1986 /* System sometimes fails to deliver SIGIO.
1988 David J. Mackenzie says that Emacs doesn't compile under
1989 Solaris if this code is enabled, thus the USG5_4 in the CPP
1990 conditional. "I haven't noticed any ill effects so far.
1991 If you find a Solaris expert somewhere, they might know
1993 kill (getpid (), SIGIO
);
1996 /* Check for keyboard input */
1997 /* If there is any, return immediately
1998 to give it higher priority than subprocesses */
2000 /* We used to do this if wait_for_cell,
2001 but that caused infinite recursion in selection request events. */
2002 if ((XINT (read_kbd
))
2003 && detect_input_pending ())
2006 if (detect_input_pending ())
2010 /* Exit now if the cell we're waiting for became non-nil. */
2011 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2015 /* If we think we have keyboard input waiting, but didn't get SIGIO
2016 go read it. This can happen with X on BSD after logging out.
2017 In that case, there really is no input and no SIGIO,
2018 but select says there is input. */
2020 if (XINT (read_kbd
) && interrupt_input
2021 && (FD_ISSET (keyboard_descriptor
, &Available
)))
2026 got_some_input
|= nfds
> 0;
2028 /* If checking input just got us a size-change event from X,
2029 obey it now if we should. */
2030 if (XINT (read_kbd
) || wait_for_cell
)
2031 do_pending_window_change ();
2033 /* Check for data from a process. */
2034 /* Really FIRST_PROC_DESC should be 0 on Unix,
2035 but this is safer in the short run. */
2036 for (channel
= keyboard_descriptor
== 0 ? FIRST_PROC_DESC
: 0;
2037 channel
<= max_process_desc
; channel
++)
2039 if (FD_ISSET (channel
, &Available
))
2043 /* If waiting for this channel, arrange to return as
2044 soon as no more input to be processed. No more
2046 if (wait_channel
== channel
)
2052 proc
= chan_process
[channel
];
2056 /* Read data from the process, starting with our
2057 buffered-ahead character if we have one. */
2059 nread
= read_process_output (proc
, channel
);
2062 /* Since read_process_output can run a filter,
2063 which can call accept-process-output,
2064 don't try to read from any other processes
2065 before doing the select again. */
2066 FD_ZERO (&Available
);
2069 redisplay_preserve_echo_area ();
2072 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2076 else if (nread
== -1 && errno
== EAGAIN
)
2080 else if (nread
== -1 && errno
== EAGAIN
)
2082 /* Note that we cannot distinguish between no input
2083 available now and a closed pipe.
2084 With luck, a closed pipe will be accompanied by
2085 subprocess termination and SIGCHLD. */
2086 else if (nread
== 0 && !NETCONN_P (proc
))
2088 #endif /* O_NDELAY */
2089 #endif /* O_NONBLOCK */
2090 #endif /* EWOULDBLOCK */
2092 /* On some OSs with ptys, when the process on one end of
2093 a pty exits, the other end gets an error reading with
2094 errno = EIO instead of getting an EOF (0 bytes read).
2095 Therefore, if we get an error reading and errno =
2096 EIO, just continue, because the child process has
2097 exited and should clean itself up soon (e.g. when we
2099 else if (nread
== -1 && errno
== EIO
)
2101 #endif /* HAVE_PTYS */
2102 /* If we can detect process termination, don't consider the process
2103 gone just because its pipe is closed. */
2105 else if (nread
== 0 && !NETCONN_P (proc
))
2110 /* Preserve status of processes already terminated. */
2111 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2112 deactivate_process (proc
);
2113 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2114 update_status (XPROCESS (proc
));
2115 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2116 XPROCESS (proc
)->status
2117 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2120 } /* end for each file descriptor */
2121 } /* end while exit conditions not met */
2123 /* If calling from keyboard input, do not quit
2124 since we want to return C-g as an input character.
2125 Otherwise, do pending quit if requested. */
2126 if (XINT (read_kbd
) >= 0)
2128 /* Prevent input_pending from remaining set if we quit. */
2129 clear_input_pending ();
2133 return got_some_input
;
2136 /* Read pending output from the process channel,
2137 starting with our buffered-ahead character if we have one.
2138 Yield number of characters read.
2140 This function reads at most 1024 characters.
2141 If you want to read all available subprocess output,
2142 you must call it repeatedly until it returns zero. */
2144 read_process_output (proc
, channel
)
2146 register int channel
;
2148 register int nchars
;
2154 register Lisp_Object outstream
;
2155 register struct buffer
*old
= current_buffer
;
2156 register struct Lisp_Process
*p
= XPROCESS (proc
);
2157 register int opoint
;
2160 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2162 vs
= get_vms_process_pointer (p
->pid
);
2166 return(0); /* Really weird if it does this */
2167 if (!(vs
->iosb
[0] & 1))
2168 return -1; /* I/O error */
2171 error ("Could not get VMS process pointer");
2172 chars
= vs
->inputBuffer
;
2173 nchars
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2176 start_vms_process_read (vs
); /* Crank up the next read on the process */
2177 return 1; /* Nothing worth printing, say we got 1 */
2181 if (proc_buffered_char
[channel
] < 0)
2182 nchars
= read (channel
, chars
, sizeof chars
);
2185 chars
[0] = proc_buffered_char
[channel
];
2186 proc_buffered_char
[channel
] = -1;
2187 nchars
= read (channel
, chars
+ 1, sizeof chars
- 1);
2191 nchars
= nchars
+ 1;
2193 #endif /* not VMS */
2195 if (nchars
<= 0) return nchars
;
2197 outstream
= p
->filter
;
2198 if (!NILP (outstream
))
2200 /* We inhibit quit here instead of just catching it so that
2201 hitting ^G when a filter happens to be running won't screw
2203 int count
= specpdl_ptr
- specpdl
;
2204 Lisp_Object odeactivate
;
2205 Lisp_Object obuffer
;
2207 odeactivate
= Vdeactivate_mark
;
2208 obuffer
= Fcurrent_buffer ();
2210 specbind (Qinhibit_quit
, Qt
);
2211 call2 (outstream
, proc
, make_string (chars
, nchars
));
2213 /* Handling the process output should not deactivate the mark. */
2214 Vdeactivate_mark
= odeactivate
;
2216 if (! EQ (Fcurrent_buffer (), obuffer
))
2217 record_asynch_buffer_change ();
2219 if (waiting_for_user_input_p
)
2220 prepare_menu_bars ();
2223 start_vms_process_read (vs
);
2225 unbind_to (count
, Qnil
);
2229 /* If no filter, write into buffer if it isn't dead. */
2230 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2232 Lisp_Object old_read_only
;
2233 Lisp_Object old_begv
, old_zv
;
2234 Lisp_Object odeactivate
;
2236 odeactivate
= Vdeactivate_mark
;
2238 Fset_buffer (p
->buffer
);
2240 old_read_only
= current_buffer
->read_only
;
2241 XFASTINT (old_begv
) = BEGV
;
2242 XFASTINT (old_zv
) = ZV
;
2244 current_buffer
->read_only
= Qnil
;
2246 /* Insert new output into buffer
2247 at the current end-of-output marker,
2248 thus preserving logical ordering of input and output. */
2249 if (XMARKER (p
->mark
)->buffer
)
2250 SET_PT (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
));
2254 /* If the output marker is outside of the visible region, save
2255 the restriction and widen. */
2256 if (! (BEGV
<= point
&& point
<= ZV
))
2259 /* Make sure opoint floats ahead of any new text, just as point
2261 if (point
<= opoint
)
2264 /* Insert after old_begv, but before old_zv. */
2265 if (point
< XFASTINT (old_begv
))
2266 XFASTINT (old_begv
) += nchars
;
2267 if (point
<= XFASTINT (old_zv
))
2268 XFASTINT (old_zv
) += nchars
;
2270 /* Insert before markers in case we are inserting where
2271 the buffer's mark is, and the user's next command is Meta-y. */
2272 insert_before_markers (chars
, nchars
);
2273 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
2275 update_mode_lines
++;
2277 /* If the restriction isn't what it should be, set it. */
2278 if (XFASTINT (old_begv
) != BEGV
|| XFASTINT (old_zv
) != ZV
)
2279 Fnarrow_to_region (old_begv
, old_zv
);
2281 /* Handling the process output should not deactivate the mark. */
2282 Vdeactivate_mark
= odeactivate
;
2284 current_buffer
->read_only
= old_read_only
;
2286 set_buffer_internal (old
);
2289 start_vms_process_read (vs
);
2294 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
2296 "Returns non-nil if emacs is waiting for input from the user.\n\
2297 This is intended for use by asynchronous process output filters and sentinels.")
2300 return (waiting_for_user_input_p
? Qt
: Qnil
);
2303 /* Sending data to subprocess */
2305 jmp_buf send_process_frame
;
2308 send_process_trap ()
2314 longjmp (send_process_frame
, 1);
2317 send_process (proc
, buf
, len
)
2322 /* Don't use register vars; longjmp can lose them. */
2324 unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
2328 struct Lisp_Process
*p
= XPROCESS (proc
);
2329 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2332 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2333 update_status (XPROCESS (proc
));
2334 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2335 error ("Process %s not running", procname
);
2338 vs
= get_vms_process_pointer (p
->pid
);
2340 error ("Could not find this process: %x", p
->pid
);
2341 else if (write_to_vms_process (vs
, buf
, len
))
2344 if (!setjmp (send_process_frame
))
2348 SIGTYPE (*old_sigpipe
)();
2351 if (pty_max_bytes
== 0)
2353 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
2354 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
2356 if (pty_max_bytes
< 0)
2357 pty_max_bytes
= 250;
2359 pty_max_bytes
= 250;
2363 /* Don't send more than pty_max_bytes bytes at a time. */
2364 /* Subtract 1 to leave room for the EOF. */
2365 if (this >= pty_max_bytes
&& !NILP (XPROCESS (proc
)->pty_flag
))
2366 this = pty_max_bytes
- 1;
2368 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
2369 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
2371 /* If we sent just part of the string, put in an EOF
2372 to force it through, before we send the rest. */
2374 Fprocess_send_eof (proc
);
2376 signal (SIGPIPE
, old_sigpipe
);
2381 || errno
== EWOULDBLOCK
2388 /* It would be nice to accept process output here,
2389 but that is difficult. For example, it could
2390 garbage what we are sending if that is from a buffer. */
2397 report_file_error ("writing to process", Fcons (proc
, Qnil
));
2401 /* Allow input from processes between bursts of sending.
2402 Otherwise things may get stopped up. */
2407 XFASTINT (zero
) = 0;
2408 wait_reading_process_input (-1, 0, zero
, 0);
2414 XPROCESS (proc
)->raw_status_low
= Qnil
;
2415 XPROCESS (proc
)->raw_status_high
= Qnil
;
2416 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2417 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2418 deactivate_process (proc
);
2420 error ("Error writing to process %s; closed it", procname
);
2422 error ("SIGPIPE raised on process %s; closed it", procname
);
2427 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
2429 "Send current contents of region as input to PROCESS.\n\
2430 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2431 nil, indicating the current buffer's process.\n\
2432 Called from program, takes three arguments, PROCESS, START and END.\n\
2433 If the region is more than 500 characters long,\n\
2434 it is sent in several bunches. This may happen even for shorter regions.\n\
2435 Output from processes can arrive in between bunches.")
2436 (process
, start
, end
)
2437 Lisp_Object process
, start
, end
;
2442 proc
= get_process (process
);
2443 validate_region (&start
, &end
);
2445 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
2448 start1
= XINT (start
);
2449 send_process (proc
, &FETCH_CHAR (start1
), XINT (end
) - XINT (start
));
2454 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
2456 "Send PROCESS the contents of STRING as input.\n\
2457 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2458 nil, indicating the current buffer's process.\n\
2459 If STRING is more than 500 characters long,\n\
2460 it is sent in several bunches. This may happen even for shorter strings.\n\
2461 Output from processes can arrive in between bunches.")
2463 Lisp_Object process
, string
;
2466 CHECK_STRING (string
, 1);
2467 proc
= get_process (process
);
2468 send_process (proc
, XSTRING (string
)->data
, XSTRING (string
)->size
);
2472 /* send a signal number SIGNO to PROCESS.
2473 CURRENT_GROUP means send to the process group that currently owns
2474 the terminal being used to communicate with PROCESS.
2475 This is used for various commands in shell mode.
2476 If NOMSG is zero, insert signal-announcements into process's buffers
2479 If we can, we try to signal PROCESS by sending control characters
2480 down the pty. This allows us to signal inferiors who have changed
2481 their uid, for which killpg would return an EPERM error. */
2484 process_send_signal (process
, signo
, current_group
, nomsg
)
2485 Lisp_Object process
;
2487 Lisp_Object current_group
;
2491 register struct Lisp_Process
*p
;
2495 proc
= get_process (process
);
2496 p
= XPROCESS (proc
);
2498 if (!EQ (p
->childp
, Qt
))
2499 error ("Process %s is not a subprocess",
2500 XSTRING (p
->name
)->data
);
2501 if (XINT (p
->infd
) < 0)
2502 error ("Process %s is not active",
2503 XSTRING (p
->name
)->data
);
2505 if (NILP (p
->pty_flag
))
2506 current_group
= Qnil
;
2508 /* If we are using pgrps, get a pgrp number and make it negative. */
2509 if (!NILP (current_group
))
2511 #ifdef SIGNALS_VIA_CHARACTERS
2512 /* If possible, send signals to the entire pgrp
2513 by sending an input character to it. */
2515 /* TERMIOS is the latest and bestest, and seems most likely to
2516 work. If the system has it, use it. */
2523 tcgetattr (XINT (p
->infd
), &t
);
2524 send_process (proc
, &t
.c_cc
[VINTR
], 1);
2528 tcgetattr (XINT (p
->infd
), &t
);
2529 send_process (proc
, &t
.c_cc
[VQUIT
], 1);
2533 tcgetattr (XINT (p
->infd
), &t
);
2534 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
2535 send_process (proc
, &t
.c_cc
[VSWTCH
], 1);
2537 send_process (proc
, &t
.c_cc
[VSUSP
], 1);
2542 #else /* ! HAVE_TERMIOS */
2544 /* On Berkeley descendants, the following IOCTL's retrieve the
2545 current control characters. */
2546 #if defined (TIOCGLTC) && defined (TIOCGETC)
2554 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2555 send_process (proc
, &c
.t_intrc
, 1);
2558 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2559 send_process (proc
, &c
.t_quitc
, 1);
2563 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
2564 send_process (proc
, &lc
.t_suspc
, 1);
2566 #endif /* ! defined (SIGTSTP) */
2569 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2571 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
2578 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2579 send_process (proc
, &t
.c_cc
[VINTR
], 1);
2582 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2583 send_process (proc
, &t
.c_cc
[VQUIT
], 1);
2587 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2588 send_process (proc
, &t
.c_cc
[VSWTCH
], 1);
2590 #endif /* ! defined (SIGTSTP) */
2592 #else /* ! defined (TCGETA) */
2593 Your configuration files are messed up
.
2594 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
2595 you'd better be using one of the alternatives above! */
2596 #endif /* ! defined (TCGETA) */
2597 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2598 #endif /* ! defined HAVE_TERMIOS */
2599 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
2602 /* Get the pgrp using the tty itself, if we have that.
2603 Otherwise, use the pty to get the pgrp.
2604 On pfa systems, saka@pfu.fujitsu.co.JP writes:
2605 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
2606 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
2607 His patch indicates that if TIOCGPGRP returns an error, then
2608 we should just assume that p->pid is also the process group id. */
2612 if (!NILP (p
->subtty
))
2613 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
2615 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
2619 gid
= - XFASTINT (p
->pid
);
2620 #endif /* ! defined (pfa) */
2626 #else /* ! defined (TIOCGPGRP ) */
2627 /* Can't select pgrps on this system, so we know that
2628 the child itself heads the pgrp. */
2629 gid
= - XFASTINT (p
->pid
);
2630 #endif /* ! defined (TIOCGPGRP ) */
2633 gid
= - XFASTINT (p
->pid
);
2639 p
->raw_status_low
= Qnil
;
2640 p
->raw_status_high
= Qnil
;
2642 XSETINT (p
->tick
, ++process_tick
);
2646 #endif /* ! defined (SIGCONT) */
2649 send_process (proc
, "\003", 1); /* ^C */
2654 send_process (proc
, "\031", 1); /* ^Y */
2659 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
2662 flush_pending_output (XINT (p
->infd
));
2666 /* If we don't have process groups, send the signal to the immediate
2667 subprocess. That isn't really right, but it's better than any
2668 obvious alternative. */
2671 kill (XFASTINT (p
->pid
), signo
);
2675 /* gid may be a pid, or minus a pgrp's number */
2677 if (!NILP (current_group
))
2678 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
2681 gid
= - XFASTINT (p
->pid
);
2684 #else /* ! defined (TIOCSIGSEND) */
2685 EMACS_KILLPG (-gid
, signo
);
2686 #endif /* ! defined (TIOCSIGSEND) */
2689 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
2690 "Interrupt process PROCESS. May be process or name of one.\n\
2691 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
2692 nil or no arg means current buffer's process.\n\
2693 Second arg CURRENT-GROUP non-nil means send signal to\n\
2694 the current process-group of the process's controlling terminal\n\
2695 rather than to the process's own process group.\n\
2696 If the process is a shell, this means interrupt current subjob\n\
2697 rather than the shell.")
2698 (process
, current_group
)
2699 Lisp_Object process
, current_group
;
2701 process_send_signal (process
, SIGINT
, current_group
, 0);
2705 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
2706 "Kill process PROCESS. May be process or name of one.\n\
2707 See function `interrupt-process' for more details on usage.")
2708 (process
, current_group
)
2709 Lisp_Object process
, current_group
;
2711 process_send_signal (process
, SIGKILL
, current_group
, 0);
2715 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
2716 "Send QUIT signal to process PROCESS. May be process or name of one.\n\
2717 See function `interrupt-process' for more details on usage.")
2718 (process
, current_group
)
2719 Lisp_Object process
, current_group
;
2721 process_send_signal (process
, SIGQUIT
, current_group
, 0);
2725 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
2726 "Stop process PROCESS. May be process or name of one.\n\
2727 See function `interrupt-process' for more details on usage.")
2728 (process
, current_group
)
2729 Lisp_Object process
, current_group
;
2732 error ("no SIGTSTP support");
2734 process_send_signal (process
, SIGTSTP
, current_group
, 0);
2739 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
2740 "Continue process PROCESS. May be process or name of one.\n\
2741 See function `interrupt-process' for more details on usage.")
2742 (process
, current_group
)
2743 Lisp_Object process
, current_group
;
2746 process_send_signal (process
, SIGCONT
, current_group
, 0);
2748 error ("no SIGCONT support");
2753 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
2754 2, 2, "nProcess number: \nnSignal code: ",
2755 "Send the process with number PID the signal with code CODE.\n\
2756 Both PID and CODE are integers.")
2758 Lisp_Object pid
, sig
;
2760 CHECK_NUMBER (pid
, 0);
2761 CHECK_NUMBER (sig
, 1);
2762 return make_number (kill (XINT (pid
), XINT (sig
)));
2765 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
2766 "Make PROCESS see end-of-file in its input.\n\
2767 Eof comes after any text already sent to it.\n\
2768 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2769 nil, indicating the current buffer's process.")
2771 Lisp_Object process
;
2775 proc
= get_process (process
);
2777 /* Make sure the process is really alive. */
2778 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2779 update_status (XPROCESS (proc
));
2780 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2781 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
2783 /* Sending a zero-length record is supposed to mean eof
2784 when TIOCREMOTE is turned on. */
2788 write (XINT (XPROCESS (proc
)->outfd
), buf
, 0);
2790 #else /* did not do TOICREMOTE */
2792 send_process (proc
, "\032", 1); /* ^z */
2794 if (!NILP (XPROCESS (proc
)->pty_flag
))
2795 send_process (proc
, "\004", 1);
2798 close (XINT (XPROCESS (proc
)->outfd
));
2799 XSET (XPROCESS (proc
)->outfd
, Lisp_Int
, open (NULL_DEVICE
, O_WRONLY
));
2802 #endif /* did not do TOICREMOTE */
2806 /* Kill all processes associated with `buffer'.
2807 If `buffer' is nil, kill all processes */
2809 kill_buffer_processes (buffer
)
2812 Lisp_Object tail
, proc
;
2814 for (tail
= Vprocess_alist
; XGCTYPE (tail
) == Lisp_Cons
;
2815 tail
= XCONS (tail
)->cdr
)
2817 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
2818 if (XGCTYPE (proc
) == Lisp_Process
2819 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
2821 if (NETCONN_P (proc
))
2822 deactivate_process (proc
);
2823 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
2824 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
2829 /* On receipt of a signal that a child status has changed,
2830 loop asking about children with changed statuses until
2831 the system says there are no more.
2832 All we do is change the status;
2833 we do not run sentinels or print notifications.
2834 That is saved for the next time keyboard input is done,
2835 in order to avoid timing errors. */
2837 /** WARNING: this can be called during garbage collection.
2838 Therefore, it must not be fooled by the presence of mark bits in
2841 /** USG WARNING: Although it is not obvious from the documentation
2842 in signal(2), on a USG system the SIGCLD handler MUST NOT call
2843 signal() before executing at least one wait(), otherwise the handler
2844 will be called again, resulting in an infinite loop. The relevant
2845 portion of the documentation reads "SIGCLD signals will be queued
2846 and the signal-catching function will be continually reentered until
2847 the queue is empty". Invoking signal() causes the kernel to reexamine
2848 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
2851 sigchld_handler (signo
)
2854 int old_errno
= errno
;
2856 register struct Lisp_Process
*p
;
2857 extern EMACS_TIME
*input_available_clear_time
;
2861 sigheld
|= sigbit (SIGCHLD
);
2873 #endif /* no WUNTRACED */
2874 /* Keep trying to get a status until we get a definitive result. */
2878 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
2880 while (pid
<= 0 && errno
== EINTR
);
2884 /* A real failure. We have done all our job, so return. */
2886 /* USG systems forget handlers when they are used;
2887 must reestablish each time */
2889 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
2892 sigheld
&= ~sigbit (SIGCHLD
);
2900 #endif /* no WNOHANG */
2902 /* Find the process that signaled us, and record its status. */
2905 for (tail
= Vprocess_alist
; XSYMBOL (tail
) != XSYMBOL (Qnil
); tail
= XCONS (tail
)->cdr
)
2907 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
2908 p
= XPROCESS (proc
);
2909 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
2914 /* Look for an asynchronous process whose pid hasn't been filled
2917 for (tail
= Vprocess_alist
; XSYMBOL (tail
) != XSYMBOL (Qnil
); tail
= XCONS (tail
)->cdr
)
2919 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
2920 p
= XPROCESS (proc
);
2921 if (XTYPE (p
->pid
) == Lisp_Int
&& XINT (p
->pid
) == -1)
2926 /* Change the status of the process that was found. */
2929 union { int i
; WAITTYPE wt
; } u
;
2931 XSETINT (p
->tick
, ++process_tick
);
2933 XFASTINT (p
->raw_status_low
) = u
.i
& 0xffff;
2934 XFASTINT (p
->raw_status_high
) = u
.i
>> 16;
2936 /* If process has terminated, stop waiting for its output. */
2937 if (WIFSIGNALED (w
) || WIFEXITED (w
))
2938 if (XINT (p
->infd
) >= 0)
2939 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
2941 /* Tell wait_reading_process_input that it needs to wake up and
2943 if (input_available_clear_time
)
2944 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
2947 /* There was no asynchronous process found for that id. Check
2948 if we have a synchronous process. */
2951 synch_process_alive
= 0;
2953 /* Report the status of the synchronous process. */
2955 synch_process_retcode
= WRETCODE (w
);
2956 else if (WIFSIGNALED (w
))
2958 int code
= WTERMSIG (w
);
2964 signame
= sys_siglist
[code
];
2966 signame
= sys_errlist
[code
];
2970 signame
= "unknown";
2972 synch_process_death
= signame
;
2975 /* Tell wait_reading_process_input that it needs to wake up and
2977 if (input_available_clear_time
)
2978 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
2981 /* On some systems, we must return right away.
2982 If any more processes want to signal us, we will
2984 Otherwise (on systems that have WNOHANG), loop around
2985 to use up all the processes that have something to tell us. */
2986 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG))
2988 signal (signo
, sigchld_handler
);
2992 #endif /* USG, but not HPUX with WNOHANG */
2998 exec_sentinel_unwind (data
)
3001 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
3006 exec_sentinel (proc
, reason
)
3007 Lisp_Object proc
, reason
;
3009 Lisp_Object sentinel
;
3010 register struct Lisp_Process
*p
= XPROCESS (proc
);
3011 int count
= specpdl_ptr
- specpdl
;
3013 sentinel
= p
->sentinel
;
3014 if (NILP (sentinel
))
3017 /* Zilch the sentinel while it's running, to avoid recursive invocations;
3018 assure that it gets restored no matter how the sentinel exits. */
3020 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
3021 /* Inhibit quit so that random quits don't screw up a running filter. */
3022 specbind (Qinhibit_quit
, Qt
);
3023 call2 (sentinel
, proc
, reason
);
3024 if (waiting_for_user_input_p
)
3025 prepare_menu_bars ();
3026 unbind_to (count
, Qnil
);
3029 /* Report all recent events of a change in process status
3030 (either run the sentinel or output a message).
3031 This is done while Emacs is waiting for keyboard input. */
3035 register Lisp_Object proc
, buffer
;
3036 Lisp_Object tail
, msg
;
3037 struct gcpro gcpro1
, gcpro2
;
3041 /* We need to gcpro tail; if read_process_output calls a filter
3042 which deletes a process and removes the cons to which tail points
3043 from Vprocess_alist, and then causes a GC, tail is an unprotected
3047 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
3050 register struct Lisp_Process
*p
;
3052 proc
= Fcdr (Fcar (tail
));
3053 p
= XPROCESS (proc
);
3055 if (XINT (p
->tick
) != XINT (p
->update_tick
))
3057 XSETINT (p
->update_tick
, XINT (p
->tick
));
3059 /* If process is still active, read any output that remains. */
3060 if (XINT (p
->infd
) >= 0)
3061 while (! EQ (p
->filter
, Qt
)
3062 && read_process_output (proc
, XINT (p
->infd
)) > 0);
3066 /* Get the text to use for the message. */
3067 if (!NILP (p
->raw_status_low
))
3069 msg
= status_message (p
->status
);
3071 /* If process is terminated, deactivate it or delete it. */
3073 if (XTYPE (p
->status
) == Lisp_Cons
)
3074 symbol
= XCONS (p
->status
)->car
;
3076 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
3077 || EQ (symbol
, Qclosed
))
3079 if (delete_exited_processes
)
3080 remove_process (proc
);
3082 deactivate_process (proc
);
3085 /* Now output the message suitably. */
3086 if (!NILP (p
->sentinel
))
3087 exec_sentinel (proc
, msg
);
3088 /* Don't bother with a message in the buffer
3089 when a process becomes runnable. */
3090 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
3092 Lisp_Object ro
, tem
;
3093 struct buffer
*old
= current_buffer
;
3096 ro
= XBUFFER (buffer
)->read_only
;
3098 /* Avoid error if buffer is deleted
3099 (probably that's why the process is dead, too) */
3100 if (NILP (XBUFFER (buffer
)->name
))
3102 Fset_buffer (buffer
);
3104 /* Insert new output into buffer
3105 at the current end-of-output marker,
3106 thus preserving logical ordering of input and output. */
3107 if (XMARKER (p
->mark
)->buffer
)
3108 SET_PT (marker_position (p
->mark
));
3111 if (point
<= opoint
)
3112 opoint
+= XSTRING (msg
)->size
+ XSTRING (p
->name
)->size
+ 10;
3114 tem
= current_buffer
->read_only
;
3115 current_buffer
->read_only
= Qnil
;
3116 insert_string ("\nProcess ");
3117 Finsert (1, &p
->name
);
3118 insert_string (" ");
3120 current_buffer
->read_only
= tem
;
3121 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
3124 set_buffer_internal (old
);
3129 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
3130 redisplay_preserve_echo_area ();
3132 update_tick
= process_tick
;
3143 if (! noninteractive
|| initialized
)
3145 signal (SIGCHLD
, sigchld_handler
);
3148 FD_ZERO (&input_wait_mask
);
3149 max_process_desc
= 0;
3151 keyboard_descriptor
= 0;
3152 FD_SET (keyboard_descriptor
, &input_wait_mask
);
3154 Vprocess_alist
= Qnil
;
3155 for (i
= 0; i
< MAXDESC
; i
++)
3157 chan_process
[i
] = Qnil
;
3158 proc_buffered_char
[i
] = -1;
3162 /* From now on, assume keyboard input comes from descriptor DESC. */
3165 change_keyboard_wait_descriptor (desc
)
3168 FD_CLR (keyboard_descriptor
, &input_wait_mask
);
3169 keyboard_descriptor
= desc
;
3170 FD_SET (keyboard_descriptor
, &input_wait_mask
);
3176 stream_process
= intern ("stream");
3178 Qprocessp
= intern ("processp");
3179 staticpro (&Qprocessp
);
3180 Qrun
= intern ("run");
3182 Qstop
= intern ("stop");
3184 Qsignal
= intern ("signal");
3185 staticpro (&Qsignal
);
3187 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
3190 Qexit = intern ("exit");
3191 staticpro (&Qexit); */
3193 Qopen
= intern ("open");
3195 Qclosed
= intern ("closed");
3196 staticpro (&Qclosed
);
3198 staticpro (&Vprocess_alist
);
3200 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
3201 "*Non-nil means delete processes immediately when they exit.\n\
3202 nil means don't delete them until `list-processes' is run.");
3204 delete_exited_processes
= 1;
3206 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
3207 "Control type of device used to communicate with subprocesses.\n\
3208 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
3209 The value has no effect if the system has no ptys or if all ptys are busy:\n\
3210 then a pipe is used in any case.\n\
3211 The value takes effect when `start-process' is called.");
3212 Vprocess_connection_type
= Qt
;
3214 defsubr (&Sprocessp
);
3215 defsubr (&Sget_process
);
3216 defsubr (&Sget_buffer_process
);
3217 defsubr (&Sdelete_process
);
3218 defsubr (&Sprocess_status
);
3219 defsubr (&Sprocess_exit_status
);
3220 defsubr (&Sprocess_id
);
3221 defsubr (&Sprocess_name
);
3222 defsubr (&Sprocess_command
);
3223 defsubr (&Sset_process_buffer
);
3224 defsubr (&Sprocess_buffer
);
3225 defsubr (&Sprocess_mark
);
3226 defsubr (&Sset_process_filter
);
3227 defsubr (&Sprocess_filter
);
3228 defsubr (&Sset_process_sentinel
);
3229 defsubr (&Sset_process_window_size
);
3230 defsubr (&Sprocess_sentinel
);
3231 defsubr (&Sprocess_kill_without_query
);
3232 defsubr (&Slist_processes
);
3233 defsubr (&Sprocess_list
);
3234 defsubr (&Sstart_process
);
3236 defsubr (&Sopen_network_stream
);
3237 #endif /* HAVE_SOCKETS */
3238 defsubr (&Saccept_process_output
);
3239 defsubr (&Sprocess_send_region
);
3240 defsubr (&Sprocess_send_string
);
3241 defsubr (&Sinterrupt_process
);
3242 defsubr (&Skill_process
);
3243 defsubr (&Squit_process
);
3244 defsubr (&Sstop_process
);
3245 defsubr (&Scontinue_process
);
3246 defsubr (&Sprocess_send_eof
);
3247 defsubr (&Ssignal_process
);
3248 defsubr (&Swaiting_for_user_input_p
);
3249 /* defsubr (&Sprocess_connection); */
3253 #else /* not subprocesses */
3255 #include <sys/types.h>
3259 #include "systime.h"
3260 #include "termopts.h"
3262 extern int frame_garbaged
;
3265 /* As described above, except assuming that there are no subprocesses:
3267 Wait for timeout to elapse and/or keyboard input to be available.
3270 timeout in seconds, or
3271 zero for no limit, or
3272 -1 means gobble data immediately available but don't wait for any.
3274 read_kbd is a Lisp_Object:
3275 0 to ignore keyboard input, or
3276 1 to return when input is available, or
3277 -1 means caller will actually read the input, so don't throw to
3279 We know that read_kbd will never be a Lisp_Process, since
3280 `subprocesses' isn't defined.
3282 do_display != 0 means redisplay should be done to show subprocess
3283 output that arrives.
3285 Return true iff we received input from any process. */
3288 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
3289 int time_limit
, microsecs
;
3290 Lisp_Object read_kbd
;
3293 EMACS_TIME end_time
, timeout
, *timeout_p
;
3296 /* What does time_limit really mean? */
3297 if (time_limit
|| microsecs
)
3299 /* It's not infinite. */
3300 timeout_p
= &timeout
;
3302 if (time_limit
== -1)
3303 /* In fact, it's zero. */
3304 EMACS_SET_SECS_USECS (timeout
, 0, 0);
3306 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
3308 /* How far in the future is that? */
3309 EMACS_GET_TIME (end_time
);
3310 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
3313 /* It's infinite. */
3316 /* This must come before stop_polling. */
3317 prepare_menu_bars ();
3319 /* Turn off periodic alarms (in case they are in use)
3320 because the select emulator uses alarms. */
3327 waitchannels
= XINT (read_kbd
) ? 1 : 0;
3329 /* If calling from keyboard input, do not quit
3330 since we want to return C-g as an input character.
3331 Otherwise, do pending quit if requested. */
3332 if (XINT (read_kbd
) >= 0)
3337 EMACS_GET_TIME (*timeout_p
);
3338 EMACS_SUB_TIME (*timeout_p
, end_time
, *timeout_p
);
3339 if (EMACS_TIME_NEG_P (*timeout_p
))
3343 /* Cause C-g and alarm signals to take immediate action,
3344 and cause input available signals to zero out timeout. */
3345 if (XINT (read_kbd
) < 0)
3346 set_waiting_for_input (&timeout
);
3348 /* If a frame has been newly mapped and needs updating,
3349 reprocess its display stuff. */
3350 if (frame_garbaged
&& do_display
)
3351 redisplay_preserve_echo_area ();
3353 if (XINT (read_kbd
) && detect_input_pending ())
3356 nfds
= select (1, &waitchannels
, 0, 0, timeout_p
);
3358 /* Make C-g and alarm signals set flags again */
3359 clear_waiting_for_input ();
3361 /* If we woke up due to SIGWINCH, actually change size now. */
3362 do_pending_window_change ();
3366 /* If the system call was interrupted, then go around the
3372 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
3373 /* System sometimes fails to deliver SIGIO. */
3374 kill (getpid (), SIGIO
);
3377 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
3381 /* If we have timed out (nfds == 0) or found some input (nfds > 0),
3393 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
3394 /* Don't confuse make-docfile by having two doc strings for this function.
3395 make-docfile does not pay attention to #if, for good reason! */
3398 register Lisp_Object name
;
3403 /* Kill all processes associated with `buffer'.
3404 If `buffer' is nil, kill all processes.
3405 Since we have no subprocesses, this does nothing. */
3407 kill_buffer_processes (buffer
)
3418 defsubr (&Sget_buffer_process
);
3422 #endif /* not subprocesses */