1 /* Asynchronous subprocess control for GNU Emacs.
2 Copyright (C) 1985, 1986, 1987, 1988, 1992 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 1, 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 */
42 #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */
43 #include <sys/socket.h>
45 #include <netinet/in.h>
46 #include <arpa/inet.h>
47 #endif /* HAVE_SOCKETS */
49 #if defined(BSD) || defined(STRIDE)
50 #include <sys/ioctl.h>
51 #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5)
53 #endif /* HAVE_PTYS and no O_NDELAY */
54 #endif /* BSD or STRIDE */
69 #include <sys/sysmacros.h> /* for "minor" */
79 #include "termhooks.h"
82 #include "dispextern.h"
84 Lisp_Object Qrun
, Qstop
, Qsignal
, Qopen
, Qclosed
;
85 /* Qexit is declared and initialized in eval.c. */
87 /* a process object is a network connection when its childp field is neither
88 Qt nor Qnil but is instead a string (name of foreign host we
89 are connected to + name of port we are connected to) */
92 static Lisp_Object stream_process
;
94 #define NETCONN_P(p) (XGCTYPE (XPROCESS (p)->childp) == Lisp_String)
96 #define NETCONN_P(p) 0
97 #endif /* HAVE_SOCKETS */
99 /* Define first descriptor number available for subprocesses. */
101 #define FIRST_PROC_DESC 1
103 #define FIRST_PROC_DESC 3
106 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
109 #if !defined (SIGCHLD) && defined (SIGCLD)
110 #define SIGCHLD SIGCLD
113 #include "syssignal.h"
115 /* Define the structure that the wait system call stores.
116 On many systems, there is a structure defined for this.
117 But on vanilla-ish USG systems there is not. */
121 #if !defined (BSD) && !defined (UNIPLUS) && !defined (STRIDE) && !(defined (HPUX) && !defined (NOMULTIPLEJOBS)) && !defined (HAVE_WAIT_HEADER)
123 #define WIFSTOPPED(w) ((w&0377) == 0177)
124 #define WIFSIGNALED(w) ((w&0377) != 0177 && (w&~0377) == 0)
125 #define WIFEXITED(w) ((w&0377) == 0)
126 #define WRETCODE(w) (w >> 8)
127 #define WSTOPSIG(w) (w >> 8)
128 #define WTERMSIG(w) (w & 0377)
130 #define WCOREDUMP(w) ((w&0200) != 0)
136 #include <sys/wait.h>
137 #endif /* not BSD 4.1 */
139 #define WAITTYPE union wait
140 #define WRETCODE(w) w.w_retcode
141 #define WCOREDUMP(w) w.w_coredump
144 /* HPUX version 7 has broken definitions of these. */
153 #define WTERMSIG(w) w.w_termsig
156 #define WSTOPSIG(w) w.w_stopsig
159 #define WIFSTOPPED(w) (WTERMSIG (w) == 0177)
162 #define WIFSIGNALED(w) (WTERMSIG (w) != 0177 && (WSTOPSIG (w)) == 0)
165 #define WIFEXITED(w) (WTERMSIG (w) == 0)
167 #endif /* BSD or UNIPLUS or STRIDE */
168 #endif /* no WAITTYPE */
171 /* For the CMU PTY driver + */
172 #define DCL_PROMPT "$ "
182 extern char *sys_errlist
[];
186 extern char *sys_siglist
[];
188 char *sys_siglist
[] =
194 "illegal instruction",
198 "floating point exception",
201 "segmentation violation",
202 "bad argument to system call",
203 "write on a pipe with no one to read it",
205 "software termination signal from kill",
207 "sendable stop signal not from tty",
208 "stop signal from tty",
209 "continue a stopped process",
210 "child status has changed",
211 "background read attempted from control tty",
212 "background write attempted from control tty",
213 "input record available at control tty",
214 "exceeded CPU time limit",
215 "exceeded file size limit"
223 extern int comm_server
;
224 extern int net_listen_address
;
227 /* t means use pty, nil means use a pipe,
228 maybe other values to come. */
229 Lisp_Object Vprocess_connection_type
;
233 #include <sys/socket.h>
237 /* Number of events of change of status of a process. */
240 /* Number of events for which the user or sentinel has been notified. */
244 /* We could get this from param.h, but better not to depend on finding that.
245 And better not to risk that it might define other symbols used in this
248 #define SELECT_TYPE fd_set
249 #else /* no FD_SET */
251 #define SELECT_TYPE int
253 /* Define the macros to access a single-int bitmap of descriptors. */
254 #define FD_SET(n, p) (*(p) |= (1 << (n)))
255 #define FD_CLR(n, p) (*(p) &= ~(1 << (n)))
256 #define FD_ISSET(n, p) (*(p) & (1 << (n)))
257 #define FD_ZERO(p) (*(p) = 0)
258 #endif /* no FD_SET */
260 /* Mask of bits indicating the descriptors that we wait for input on */
262 SELECT_TYPE input_wait_mask
;
264 int delete_exited_processes
;
266 /* Indexed by descriptor, gives the process (if any) for that descriptor */
267 Lisp_Object chan_process
[MAXDESC
];
269 /* Alist of elements (NAME . PROCESS) */
270 Lisp_Object Vprocess_alist
;
272 Lisp_Object Qprocessp
;
274 Lisp_Object
get_process ();
276 /* Buffered-ahead input char from process, indexed by channel.
277 -1 means empty (no char is buffered).
278 Used on sys V where the only way to tell if there is any
279 output from the process is to read at least one char.
280 Always -1 on systems that support FIONREAD. */
282 int proc_buffered_char
[MAXDESC
];
284 /* Compute the Lisp form of the process status, p->status, from
285 the numeric status that was returned by `wait'. */
288 struct Lisp_Process
*p
;
290 union { int i
; WAITTYPE wt
; } u
;
291 u
.i
= XFASTINT (p
->raw_status_low
) + (XFASTINT (p
->raw_status_high
) << 16);
292 p
->status
= status_convert (u
.wt
);
293 p
->raw_status_low
= Qnil
;
294 p
->raw_status_high
= Qnil
;
297 /* Convert a process status work in Unix format to
298 the list that we use internally. */
305 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
306 else if (WIFEXITED (w
))
307 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
308 WCOREDUMP (w
) ? Qt
: Qnil
));
309 else if (WIFSIGNALED (w
))
310 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
311 WCOREDUMP (w
) ? Qt
: Qnil
));
316 /* Given a status-list, extract the three pieces of information
317 and store them individually through the three pointers. */
320 decode_status (l
, symbol
, code
, coredump
)
328 if (XTYPE (l
) == Lisp_Symbol
)
336 *symbol
= XCONS (l
)->car
;
337 tem
= XCONS (l
)->cdr
;
338 *code
= XFASTINT (XCONS (tem
)->car
);
339 tem
= XFASTINT (XCONS (tem
)->cdr
);
340 *coredump
= !NILP (tem
);
344 /* Return a string describing a process status list. */
347 status_message (status
)
352 Lisp_Object string
, string2
;
354 decode_status (status
, &symbol
, &code
, &coredump
);
356 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
358 string
= build_string (code
< NSIG
? sys_siglist
[code
] : "unknown");
359 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
360 XSTRING (string
)->data
[0] = DOWNCASE (XSTRING (string
)->data
[0]);
361 return concat2 (string
, string2
);
363 else if (EQ (symbol
, Qexit
))
366 return build_string ("finished\n");
367 string
= Fint_to_string (make_number (code
));
368 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
369 return concat2 (build_string ("exited abnormally with code "),
370 concat2 (string
, string2
));
373 return Fcopy_sequence (Fsymbol_name (symbol
));
377 static int pty_process
;
379 /* Open an available pty, returning a file descriptor.
380 Return -1 on failure.
381 The file name of the terminal corresponding to the pty
382 is left in the variable pty_name. */
393 /* Some systems name their pseudoterminals so that there are gaps in
394 the usual sequence - for example, on HP9000/S700 systems, there
395 are no pseudoterminals with names ending in 'f'. So we wait for
396 three failures in a row before deciding that we've reached the
398 int failed_count
= 0;
403 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
404 for (i
= 0; i
< 16; i
++)
407 #ifdef PTY_NAME_SPRINTF
410 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
411 #endif /* no PTY_NAME_SPRINTF */
415 #else /* no PTY_OPEN */
417 /* Unusual IRIS code */
418 *ptyv
= open ("/dev/ptc", O_RDWR
| O_NDELAY
, 0);
421 if (fstat (fd
, &stb
) < 0)
424 if (stat (pty_name
, &stb
) < 0)
427 if (failed_count
>= 3)
433 fd
= open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
435 fd
= open (pty_name
, O_RDWR
| O_NDELAY
, 0);
437 #endif /* not IRIS */
438 #endif /* no PTY_OPEN */
442 /* check to make certain that both sides are available
443 this avoids a nasty yet stupid bug in rlogins */
444 #ifdef PTY_TTY_NAME_SPRINTF
447 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
448 #endif /* no PTY_TTY_NAME_SPRINTF */
450 if (access (pty_name
, 6) != 0)
459 #endif /* not UNIPLUS */
466 #endif /* HAVE_PTYS */
472 register Lisp_Object val
, tem
, name1
;
473 register struct Lisp_Process
*p
;
477 /* size of process structure includes the vector header,
478 so deduct for that. But struct Lisp_Vector includes the first
479 element, thus deducts too much, so add it back. */
480 val
= Fmake_vector (make_number ((sizeof (struct Lisp_Process
)
481 - sizeof (struct Lisp_Vector
)
482 + sizeof (Lisp_Object
))
483 / sizeof (Lisp_Object
)),
485 XSETTYPE (val
, Lisp_Process
);
488 XFASTINT (p
->infd
) = 0;
489 XFASTINT (p
->outfd
) = 0;
490 XFASTINT (p
->pid
) = 0;
491 XFASTINT (p
->tick
) = 0;
492 XFASTINT (p
->update_tick
) = 0;
493 p
->raw_status_low
= Qnil
;
494 p
->raw_status_high
= Qnil
;
496 p
->mark
= Fmake_marker ();
498 /* If name is already in use, modify it until it is unused. */
503 tem
= Fget_process (name1
);
504 if (NILP (tem
)) break;
505 sprintf (suffix
, "<%d>", i
);
506 name1
= concat2 (name
, build_string (suffix
));
510 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
514 remove_process (proc
)
515 register Lisp_Object proc
;
517 register Lisp_Object pair
;
519 pair
= Frassq (proc
, Vprocess_alist
);
520 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
521 Fset_marker (XPROCESS (proc
)->mark
, Qnil
, Qnil
);
523 deactivate_process (proc
);
526 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
527 "Return t if OBJECT is a process.")
531 return XTYPE (obj
) == Lisp_Process
? Qt
: Qnil
;
534 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
535 "Return the process named NAME, or nil if there is none.")
537 register Lisp_Object name
;
539 if (XTYPE (name
) == Lisp_Process
)
541 CHECK_STRING (name
, 0);
542 return Fcdr (Fassoc (name
, Vprocess_alist
));
545 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
546 "Return the (or, a) process associated with BUFFER.\n\
547 BUFFER may be a buffer or the name of one.")
549 register Lisp_Object name
;
551 register Lisp_Object buf
, tail
, proc
;
553 if (NILP (name
)) return Qnil
;
554 buf
= Fget_buffer (name
);
555 if (NILP (buf
)) return Qnil
;
557 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
559 proc
= Fcdr (Fcar (tail
));
560 if (XTYPE (proc
) == Lisp_Process
&& EQ (XPROCESS (proc
)->buffer
, buf
))
566 /* This is how commands for the user decode process arguments. It
567 accepts a process, a process name, a buffer, a buffer name, or nil.
568 Buffers denote the first process in the buffer, and nil denotes the
573 register Lisp_Object name
;
575 register Lisp_Object proc
;
577 proc
= Fget_buffer_process (Fcurrent_buffer ());
580 proc
= Fget_process (name
);
582 proc
= Fget_buffer_process (Fget_buffer (name
));
589 error ("Current buffer has no process");
591 error ("Process %s does not exist", XSTRING (name
)->data
);
595 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
596 "Delete PROCESS: kill it and forget about it immediately.\n\
597 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
598 nil, indicating the current buffer's process.")
600 register Lisp_Object proc
;
602 proc
= get_process (proc
);
603 XPROCESS (proc
)->raw_status_low
= Qnil
;
604 XPROCESS (proc
)->raw_status_high
= Qnil
;
605 if (NETCONN_P (proc
))
607 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
608 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
610 else if (XFASTINT (XPROCESS (proc
)->infd
))
612 Fkill_process (proc
, Qnil
);
613 /* Do this now, since remove_process will make sigchld_handler do nothing. */
614 XPROCESS (proc
)->status
615 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
616 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
619 remove_process (proc
);
623 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
624 "Return the status of PROCESS: a symbol, one of these:\n\
625 run -- for a process that is running.\n\
626 stop -- for a process stopped but continuable.\n\
627 exit -- for a process that has exited.\n\
628 signal -- for a process that has got a fatal signal.\n\
629 open -- for a network stream connection that is open.\n\
630 closed -- for a network stream connection that is closed.\n\
631 nil -- if arg is a process name and no such process exists.\n\
632 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
633 nil, indicating the current buffer's process.")
634 /* command -- for a command channel opened to Emacs by another process.\n\
635 external -- for an i/o channel opened to Emacs by another process.\n\ */
637 register Lisp_Object proc
;
639 register struct Lisp_Process
*p
;
640 register Lisp_Object status
;
641 proc
= get_process (proc
);
645 if (!NILP (p
->raw_status_low
))
648 if (XTYPE (status
) == Lisp_Cons
)
649 status
= XCONS (status
)->car
;
650 if (NETCONN_P (proc
))
652 if (EQ (status
, Qrun
))
654 else if (EQ (status
, Qexit
))
660 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
662 "Return the exit status of PROCESS or the signal number that killed it.\n\
663 If PROCESS has not yet exited or died, return 0.")
665 register Lisp_Object proc
;
667 CHECK_PROCESS (proc
, 0);
668 if (!NILP (XPROCESS (proc
)->raw_status_low
))
669 update_status (XPROCESS (proc
));
670 if (XTYPE (XPROCESS (proc
)->status
) == Lisp_Cons
)
671 return XCONS (XCONS (XPROCESS (proc
)->status
)->cdr
)->car
;
672 return make_number (0);
675 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
676 "Return the process id of PROCESS.\n\
677 This is the pid of the Unix process which PROCESS uses or talks to.\n\
678 For a network connection, this value is nil.")
680 register Lisp_Object proc
;
682 CHECK_PROCESS (proc
, 0);
683 return XPROCESS (proc
)->pid
;
686 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
687 "Return the name of PROCESS, as a string.\n\
688 This is the name of the program invoked in PROCESS,\n\
689 possibly modified to make it unique among process names.")
691 register Lisp_Object proc
;
693 CHECK_PROCESS (proc
, 0);
694 return XPROCESS (proc
)->name
;
697 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
698 "Return the command that was executed to start PROCESS.\n\
699 This is a list of strings, the first string being the program executed\n\
700 and the rest of the strings being the arguments given to it.\n\
701 For a non-child channel, this is nil.")
703 register Lisp_Object proc
;
705 CHECK_PROCESS (proc
, 0);
706 return XPROCESS (proc
)->command
;
709 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
711 "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).")
713 register Lisp_Object proc
, buffer
;
715 CHECK_PROCESS (proc
, 0);
717 CHECK_BUFFER (buffer
, 1);
718 XPROCESS (proc
)->buffer
= buffer
;
722 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
724 "Return the buffer PROCESS is associated with.\n\
725 Output from PROCESS is inserted in this buffer\n\
726 unless PROCESS has a filter.")
728 register Lisp_Object proc
;
730 CHECK_PROCESS (proc
, 0);
731 return XPROCESS (proc
)->buffer
;
734 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
736 "Return the marker for the end of the last output from PROCESS.")
738 register Lisp_Object proc
;
740 CHECK_PROCESS (proc
, 0);
741 return XPROCESS (proc
)->mark
;
744 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
746 "Give PROCESS the filter function FILTER; nil means no filter.\n\
747 When a process has a filter, each time it does output\n\
748 the entire string of output is passed to the filter.\n\
749 The filter gets two arguments: the process and the string of output.\n\
750 If the process has a filter, its buffer is not used for output.")
752 register Lisp_Object proc
, filter
;
754 CHECK_PROCESS (proc
, 0);
755 XPROCESS (proc
)->filter
= filter
;
759 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
761 "Returns the filter function of PROCESS; nil if none.\n\
762 See `set-process-filter' for more info on filter functions.")
764 register Lisp_Object proc
;
766 CHECK_PROCESS (proc
, 0);
767 return XPROCESS (proc
)->filter
;
770 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
772 "Give PROCESS the sentinel SENTINEL; nil for none.\n\
773 The sentinel is called as a function when the process changes state.\n\
774 It gets two arguments: the process, and a string describing the change.")
776 register Lisp_Object proc
, sentinel
;
778 CHECK_PROCESS (proc
, 0);
779 XPROCESS (proc
)->sentinel
= sentinel
;
783 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
785 "Return the sentinel of PROCESS; nil if none.\n\
786 See `set-process-sentinel' for more info on sentinels.")
788 register Lisp_Object proc
;
790 CHECK_PROCESS (proc
, 0);
791 return XPROCESS (proc
)->sentinel
;
794 DEFUN ("process-kill-without-query", Fprocess_kill_without_query
,
795 Sprocess_kill_without_query
, 1, 2, 0,
796 "Say no query needed if PROCESS is running when Emacs is exited.\n\
797 Optional second argument if non-nill says to require a query.\n\
798 Value is t if a query was formerly required.")
800 register Lisp_Object proc
, value
;
804 CHECK_PROCESS (proc
, 0);
805 tem
= XPROCESS (proc
)->kill_without_query
;
806 XPROCESS (proc
)->kill_without_query
= Fnull (value
);
814 register Lisp_Object tail
, tem
;
815 Lisp_Object proc
, minspace
, tem1
;
816 register struct buffer
*old
= current_buffer
;
817 register struct Lisp_Process
*p
;
821 XFASTINT (minspace
) = 1;
823 set_buffer_internal (XBUFFER (Vstandard_output
));
824 Fbuffer_disable_undo (Vstandard_output
);
826 current_buffer
->truncate_lines
= Qt
;
829 Proc Status Buffer Command\n\
830 ---- ------ ------ -------\n", -1);
832 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
836 proc
= Fcdr (Fcar (tail
));
838 if (NILP (p
->childp
))
841 Finsert (1, &p
->name
);
842 Findent_to (make_number (13), minspace
);
844 if (!NILP (p
->raw_status_low
))
847 if (XTYPE (p
->status
) == Lisp_Cons
)
848 symbol
= XCONS (p
->status
)->car
;
851 if (EQ (symbol
, Qsignal
))
854 tem
= Fcar (Fcdr (p
->status
));
856 if (XINT (tem
) < NSIG
)
857 write_string (sys_siglist
[XINT (tem
)], -1);
860 Fprinc (symbol
, Qnil
);
862 else if (NETCONN_P (proc
))
864 if (EQ (symbol
, Qrun
))
865 write_string ("open", -1);
866 else if (EQ (symbol
, Qexit
))
867 write_string ("closed", -1);
869 Fprinc (symbol
, Qnil
);
872 Fprinc (symbol
, Qnil
);
874 if (EQ (symbol
, Qexit
))
877 tem
= Fcar (Fcdr (p
->status
));
880 sprintf (tembuf
, " %d", XFASTINT (tem
));
881 write_string (tembuf
, -1);
885 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
886 remove_process (proc
);
888 Findent_to (make_number (22), minspace
);
889 if (NILP (p
->buffer
))
890 insert_string ("(none)");
891 else if (NILP (XBUFFER (p
->buffer
)->name
))
892 insert_string ("(Killed)");
894 Finsert (1, &XBUFFER (p
->buffer
)->name
);
896 Findent_to (make_number (37), minspace
);
898 if (NETCONN_P (proc
))
900 sprintf (tembuf
, "(network stream connection to %s)\n",
901 XSTRING (p
->childp
)->data
);
902 insert_string (tembuf
);
916 insert_string ("\n");
922 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 0, "",
923 "Display a list of all processes.\n\
924 \(Any processes listed as Exited or Signaled are actually eliminated\n\
925 after the listing is made.)")
928 internal_with_output_to_temp_buffer ("*Process List*",
929 list_processes_1
, Qnil
);
933 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
934 "Return a list of all processes.")
937 return Fmapcar (Qcdr
, Vprocess_alist
);
940 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
941 "Start a program in a subprocess. Return the process object for it.\n\
942 Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\
943 NAME is name for process. It is modified if necessary to make it unique.\n\
944 BUFFER is the buffer or (buffer-name) to associate with the process.\n\
945 Process output goes at end of that buffer, unless you specify\n\
946 an output stream or filter function to handle the output.\n\
947 BUFFER may be also nil, meaning that this process is not associated\n\
949 Third arg is program file name. It is searched for as in the shell.\n\
950 Remaining arguments are strings to give program as arguments.")
953 register Lisp_Object
*args
;
955 Lisp_Object buffer
, name
, program
, proc
, tem
;
957 register unsigned char *new_argv
;
960 register unsigned char **new_argv
;
966 buffer
= Fget_buffer_create (buffer
);
969 CHECK_STRING (name
, 0);
973 CHECK_STRING (program
, 2);
976 /* Make a one member argv with all args concatenated
977 together separated by a blank. */
978 len
= XSTRING (program
)->size
+ 2;
979 for (i
= 3; i
< nargs
; i
++)
982 CHECK_STRING (tem
, i
);
983 len
+= XSTRING (tem
)->size
+ 1; /* count the blank */
985 new_argv
= (unsigned char *) alloca (len
);
986 strcpy (new_argv
, XSTRING (program
)->data
);
987 for (i
= 3; i
< nargs
; i
++)
990 CHECK_STRING (tem
, i
);
991 strcat (new_argv
, " ");
992 strcat (new_argv
, XSTRING (tem
)->data
);
995 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
997 for (i
= 3; i
< nargs
; i
++)
1000 CHECK_STRING (tem
, i
);
1001 new_argv
[i
- 2] = XSTRING (tem
)->data
;
1003 new_argv
[i
- 2] = 0;
1004 new_argv
[0] = XSTRING (program
)->data
;
1006 /* If program file name is not absolute, search our path for it */
1007 if (new_argv
[0][0] != '/')
1010 openp (Vexec_path
, program
, "", &tem
, 1);
1012 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1013 new_argv
[0] = XSTRING (tem
)->data
;
1015 #endif /* not VMS */
1017 proc
= make_process (name
);
1019 XPROCESS (proc
)->childp
= Qt
;
1020 XPROCESS (proc
)->command_channel_p
= Qnil
;
1021 XPROCESS (proc
)->buffer
= buffer
;
1022 XPROCESS (proc
)->sentinel
= Qnil
;
1023 XPROCESS (proc
)->filter
= Qnil
;
1024 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1026 create_process (proc
, new_argv
);
1032 create_process_1 (signo
)
1036 /* USG systems forget handlers when they are used;
1037 must reestablish each time */
1038 signal (signo
, create_process_1
);
1042 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1045 /* Mimic blocking of signals on system V, which doesn't really have it. */
1047 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1048 int sigchld_deferred
;
1051 create_process_sigchld ()
1053 signal (SIGCHLD
, create_process_sigchld
);
1055 sigchld_deferred
= 1;
1061 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1062 create_process (process
, new_argv
)
1063 Lisp_Object process
;
1066 int pid
, inchannel
, outchannel
, forkin
, forkout
;
1069 SIGTYPE (*sigchld
)();
1072 Lisp_Object current_dir
;
1073 extern char **environ
;
1075 inchannel
= outchannel
= -1;
1078 if (EQ (Vprocess_connection_type
, Qt
))
1079 outchannel
= inchannel
= allocate_pty ();
1081 /* Make sure that the child will be able to chdir to the current
1082 buffer's current directory. We can't just have the child check
1083 for an error when it does the chdir, since it's in a vfork. */
1084 current_dir
= expand_and_dir_to_file (current_buffer
->directory
, Qnil
);
1085 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1086 report_file_error ("Setting current directory",
1087 Fcons (current_buffer
->directory
, Qnil
));
1092 /* On USG systems it does not work to open the pty's tty here
1093 and then close and reopen it in the child. */
1095 /* Don't let this terminal become our controlling terminal
1096 (in case we don't have one). */
1097 forkout
= forkin
= open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1099 forkout
= forkin
= open (pty_name
, O_RDWR
, 0);
1102 report_file_error ("Opening pty", Qnil
);
1104 forkin
= forkout
= -1;
1105 #endif /* not USG */
1109 #endif /* HAVE_PTYS */
1112 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1113 report_file_error ("Opening socketpair", Qnil
);
1114 outchannel
= inchannel
= sv
[0];
1115 forkout
= forkin
= sv
[1];
1117 #else /* not SKTPAIR */
1126 #endif /* not SKTPAIR */
1129 /* Replaced by close_process_descs */
1130 set_exclusive_use (inchannel
);
1131 set_exclusive_use (outchannel
);
1134 /* Stride people say it's a mystery why this is needed
1135 as well as the O_NDELAY, but that it fails without this. */
1136 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1139 ioctl (inchannel
, FIONBIO
, &one
);
1144 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1147 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1151 /* Record this as an active process, with its channels.
1152 As a result, child_setup will close Emacs's side of the pipes. */
1153 chan_process
[inchannel
] = process
;
1154 XFASTINT (XPROCESS (process
)->infd
) = inchannel
;
1155 XFASTINT (XPROCESS (process
)->outfd
) = outchannel
;
1156 /* Record the tty descriptor used in the subprocess. */
1158 XPROCESS (process
)->subtty
= Qnil
;
1160 XFASTINT (XPROCESS (process
)->subtty
) = forkin
;
1161 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1162 XPROCESS (process
)->status
= Qrun
;
1164 /* Delay interrupts until we have a chance to store
1165 the new fork's pid in its process structure */
1169 #else /* not BSD4_1 */
1170 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1171 sigsetmask (sigmask (SIGCHLD
));
1172 #else /* ordinary USG */
1174 sigchld_deferred
= 0;
1175 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1177 #endif /* ordinary USG */
1178 #endif /* not BSD4_1 */
1179 #endif /* SIGCHLD */
1181 /* Until we store the proper pid, enable sigchld_handler
1182 to recognize an unknown pid as standing for this process.
1183 It is very important not to let this `marker' value stay
1184 in the table after this function has returned; if it does
1185 it might cause call-process to hang and subsequent asynchronous
1186 processes to get their return values scrambled. */
1187 XSETINT (XPROCESS (process
)->pid
, -1);
1190 /* child_setup must clobber environ on systems with true vfork.
1191 Protect it from permanent change. */
1192 char **save_environ
= environ
;
1197 int xforkin
= forkin
;
1198 int xforkout
= forkout
;
1200 #if 0 /* This was probably a mistake--it duplicates code later on,
1201 but fails to handle all the cases. */
1202 /* Make sure SIGCHLD is not blocked in the child. */
1203 sigsetmask (SIGEMPTYMASK
);
1206 /* Make the pty be the controlling terminal of the process. */
1208 /* First, disconnect its current controlling terminal. */
1212 /* Make the pty's terminal the controlling terminal. */
1213 if (pty_flag
&& (ioctl (xforkin
, TIOCSCTTY
, 0) < 0))
1216 #else /* not HAVE_SETSID */
1218 /* It's very important to call setpgrp() here and no time
1219 afterwards. Otherwise, we lose our controlling tty which
1220 is set when we open the pty. */
1223 #endif /* not HAVE_SETSID */
1225 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1226 can do TIOCSPGRP only to the process's controlling tty. */
1229 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1230 I can't test it since I don't have 4.3. */
1231 int j
= open ("/dev/tty", O_RDWR
, 0);
1232 ioctl (j
, TIOCNOTTY
, 0);
1235 /* In order to get a controlling terminal on some versions
1236 of BSD, it is necessary to put the process in pgrp 0
1237 before it opens the terminal. */
1241 #endif /* TIOCNOTTY */
1243 #if !defined (RTU) && !defined (UNIPLUS)
1244 /*** There is a suggestion that this ought to be a
1245 conditional on TIOCSPGRP. */
1246 /* Now close the pty (if we had it open) and reopen it.
1247 This makes the pty the controlling terminal of the subprocess. */
1250 /* I wonder if close (open (pty_name, ...)) would work? */
1253 xforkout
= xforkin
= open (pty_name
, O_RDWR
, 0);
1258 #endif /* not UNIPLUS and not RTU */
1259 #ifdef SETUP_SLAVE_PTY
1261 #endif /* SETUP_SLAVE_PTY */
1263 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1264 Now reenable it in the child, so it will die when we want it to. */
1266 signal (SIGHUP
, SIG_DFL
);
1268 #endif /* HAVE_PTYS */
1273 #else /* not BSD4_1 */
1274 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1275 sigsetmask (SIGEMPTYMASK
);
1276 #else /* ordinary USG */
1277 signal (SIGCHLD
, sigchld
);
1278 #endif /* ordinary USG */
1279 #endif /* not BSD4_1 */
1280 #endif /* SIGCHLD */
1282 child_setup_tty (xforkout
);
1283 child_setup (xforkin
, xforkout
, xforkout
,
1284 new_argv
, 1, current_dir
);
1286 environ
= save_environ
;
1291 remove_process (process
);
1292 report_file_error ("Doing vfork", Qnil
);
1295 XFASTINT (XPROCESS (process
)->pid
) = pid
;
1297 FD_SET (inchannel
, &input_wait_mask
);
1299 /* If the subfork execv fails, and it exits,
1300 this close hangs. I don't know why.
1301 So have an interrupt jar it loose. */
1303 signal (SIGALRM
, create_process_1
);
1306 /* OK to close only if it's not a pty. Otherwise we need to leave
1307 it open for ioctl to get pgrp when signals are sent, or to send
1308 the interrupt characters through if that's how we're signalling
1309 subprocesses. Alternately if you are concerned about running out
1310 of file descriptors, you could just save the tty name and open
1311 just to do the ioctl. */
1312 if (NILP (XFASTINT (XPROCESS (process
)->pty_flag
)))
1315 XPROCESS (process
)->subtty
= Qnil
;
1321 if (forkin
!= forkout
&& forkout
>= 0)
1327 #else /* not BSD4_1 */
1328 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1329 sigsetmask (SIGEMPTYMASK
);
1330 #else /* ordinary USG */
1332 signal (SIGCHLD
, sigchld
);
1333 /* Now really handle any of these signals
1334 that came in during this function. */
1335 if (sigchld_deferred
)
1336 kill (getpid (), SIGCHLD
);
1338 #endif /* ordinary USG */
1339 #endif /* not BSD4_1 */
1340 #endif /* SIGCHLD */
1342 #endif /* not VMS */
1346 /* open a TCP network connection to a given HOST/SERVICE. Treated
1347 exactly like a normal process when reading and writing. Only
1348 differences are in status display and process deletion. A network
1349 connection has no PID; you cannot signal it. All you can do is
1350 deactivate and close it via delete-process */
1352 DEFUN ("open-network-stream", Fopen_network_stream
, Sopen_network_stream
,
1354 "Open a TCP connection for a service to a host.\n\
1355 Returns a subprocess-object to represent the connection.\n\
1356 Input and output work as for subprocesses; `delete-process' closes it.\n\
1357 Args are NAME BUFFER HOST SERVICE.\n\
1358 NAME is name for process. It is modified if necessary to make it unique.\n\
1359 BUFFER is the buffer (or buffer-name) to associate with the process.\n\
1360 Process output goes at end of that buffer, unless you specify\n\
1361 an output stream or filter function to handle the output.\n\
1362 BUFFER may be also nil, meaning that this process is not associated\n\
1364 Third arg is name of the host to connect to, or its IP address.\n\
1365 Fourth arg SERVICE is name of the service desired, or an integer\n\
1366 specifying a port number to connect to.")
1367 (name
, buffer
, host
, service
)
1368 Lisp_Object name
, buffer
, host
, service
;
1372 struct sockaddr_in address
;
1373 struct servent
*svc_info
;
1374 struct hostent
*host_info_ptr
, host_info
;
1375 char *(addr_list
[2]);
1376 unsigned long numeric_addr
;
1380 struct hostent host_info_fixed
;
1381 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1383 GCPRO4 (name
, buffer
, host
, service
);
1384 CHECK_STRING (name
, 0);
1385 CHECK_STRING (host
, 0);
1386 if (XTYPE(service
) == Lisp_Int
)
1387 port
= htons ((unsigned short) XINT (service
));
1390 CHECK_STRING (service
, 0);
1391 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
1393 error ("Unknown service \"%s\"", XSTRING (service
)->data
);
1394 port
= svc_info
->s_port
;
1397 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
1398 if (host_info_ptr
== 0)
1399 /* Attempt to interpret host as numeric inet address */
1401 numeric_addr
= inet_addr (XSTRING (host
)->data
);
1402 if (numeric_addr
== -1)
1403 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
1405 host_info_ptr
= &host_info
;
1406 host_info
.h_name
= 0;
1407 host_info
.h_aliases
= 0;
1408 host_info
.h_addrtype
= AF_INET
;
1409 host_info
.h_addr_list
= &(addr_list
[0]);
1410 addr_list
[0] = (char*)(&numeric_addr
);
1412 host_info
.h_length
= strlen (addr_list
[0]);
1415 bzero (&address
, sizeof address
);
1416 bcopy (host_info_ptr
->h_addr
, (char *) &address
.sin_addr
,
1417 host_info_ptr
->h_length
);
1418 address
.sin_family
= host_info_ptr
->h_addrtype
;
1419 address
.sin_port
= port
;
1421 s
= socket (host_info_ptr
->h_addrtype
, SOCK_STREAM
, 0);
1423 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1426 if (connect (s
, &address
, sizeof address
) == -1)
1433 report_file_error ("connection failed",
1434 Fcons (host
, Fcons (name
, Qnil
)));
1440 report_file_error ("error duplicating socket", Fcons (name
, Qnil
));
1443 buffer
= Fget_buffer_create (buffer
);
1444 proc
= make_process (name
);
1446 chan_process
[inch
] = proc
;
1449 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
1452 fcntl (inch
, F_SETFL
, O_NDELAY
);
1456 XPROCESS (proc
)->childp
= host
;
1457 XPROCESS (proc
)->command_channel_p
= Qnil
;
1458 XPROCESS (proc
)->buffer
= buffer
;
1459 XPROCESS (proc
)->sentinel
= Qnil
;
1460 XPROCESS (proc
)->filter
= Qnil
;
1461 XPROCESS (proc
)->command
= Qnil
;
1462 XPROCESS (proc
)->pid
= Qnil
;
1463 XFASTINT (XPROCESS (proc
)->infd
) = s
;
1464 XFASTINT (XPROCESS (proc
)->outfd
) = outch
;
1465 XPROCESS (proc
)->status
= Qrun
;
1466 FD_SET (inch
, &input_wait_mask
);
1471 #endif /* HAVE_SOCKETS */
1473 deactivate_process (proc
)
1476 register int inchannel
, outchannel
;
1477 register struct Lisp_Process
*p
= XPROCESS (proc
);
1479 inchannel
= XFASTINT (p
->infd
);
1480 outchannel
= XFASTINT (p
->outfd
);
1484 /* Beware SIGCHLD hereabouts. */
1485 flush_pending_output (inchannel
);
1488 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
1489 sys$
dassgn (outchannel
);
1490 vs
= get_vms_process_pointer (p
->pid
)
1492 give_back_vms_process_stuff (vs
);
1496 if (outchannel
&& outchannel
!= inchannel
)
1500 XFASTINT (p
->infd
) = 0;
1501 XFASTINT (p
->outfd
) = 0;
1502 chan_process
[inchannel
] = Qnil
;
1503 FD_CLR (inchannel
, &input_wait_mask
);
1507 /* Close all descriptors currently in use for communication
1508 with subprocess. This is used in a newly-forked subprocess
1509 to get rid of irrelevant descriptors. */
1511 close_process_descs ()
1514 for (i
= 0; i
< MAXDESC
; i
++)
1516 Lisp_Object process
;
1517 process
= chan_process
[i
];
1518 if (!NILP (process
))
1520 int in
= XFASTINT (XPROCESS (process
)->infd
);
1521 int out
= XFASTINT (XPROCESS (process
)->outfd
);
1524 if (out
&& in
!= out
)
1530 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
1532 "Allow any pending output from subprocesses to be read by Emacs.\n\
1533 It is read into the process' buffers or given to their filter functions.\n\
1534 Non-nil arg PROCESS means do not return until some output has been received\n\
1536 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
1537 seconds and microseconds to wait; return after that much time whether\n\
1538 or not there is input.\n\
1539 Return non-nil iff we received any output before the timeout expired.")
1540 (proc
, timeout
, timeout_msecs
)
1541 register Lisp_Object proc
, timeout
, timeout_msecs
;
1546 if (! NILP (timeout_msecs
))
1548 CHECK_NUMBER (timeout_msecs
, 2);
1549 useconds
= XINT (timeout_msecs
);
1550 if (XTYPE (timeout
) != Lisp_Int
)
1551 XSET (timeout
, Lisp_Int
, 0);
1554 int carry
= useconds
/ 1000000;
1556 XSETINT (timeout
, XINT (timeout
) + carry
);
1557 useconds
-= carry
* 1000000;
1559 /* I think this clause is necessary because C doesn't
1560 guarantee a particular rounding direction for negative
1564 XSETINT (timeout
, XINT (timeout
) - 1);
1565 useconds
+= 1000000;
1570 if (! NILP (timeout
))
1572 CHECK_NUMBER (timeout
, 1);
1573 seconds
= XINT (timeout
);
1586 XFASTINT (proc
) = 0;
1589 (wait_reading_process_input (seconds
, useconds
, proc
, 0)
1593 /* This variable is different from waiting_for_input in keyboard.c.
1594 It is used to communicate to a lisp process-filter/sentinel (via the
1595 function Fwaiting_for_user_input_p below) whether emacs was waiting
1596 for user-input when that process-filter was called.
1597 waiting_for_input cannot be used as that is by definition 0 when
1598 lisp code is being evalled */
1599 static int waiting_for_user_input_p
;
1601 /* Read and dispose of subprocess output while waiting for timeout to
1602 elapse and/or keyboard input to be available.
1605 timeout in seconds, or
1606 zero for no limit, or
1607 -1 means gobble data immediately available but don't wait for any.
1609 read_kbd is a lisp value:
1610 0 to ignore keyboard input, or
1611 1 to return when input is available, or
1612 -1 means caller will actually read the input, so don't throw to
1613 the quit handler, or
1614 a process object, meaning wait until something arrives from that
1615 process. The return value is true iff we read some input from
1618 do_display != 0 means redisplay should be done to show subprocess
1619 output that arrives.
1621 If read_kbd is a pointer to a struct Lisp_Process, then the
1622 function returns true iff we received input from that process
1623 before the timeout elapsed.
1624 Otherwise, return true iff we recieved input from any process. */
1626 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
1627 int time_limit
, microsecs
;
1628 Lisp_Object read_kbd
;
1631 register int channel
, nfds
, m
;
1632 static SELECT_TYPE Available
;
1635 EMACS_TIME timeout
, end_time
, garbage
;
1637 int wait_channel
= 0;
1638 struct Lisp_Process
*wait_proc
= 0;
1639 int got_some_input
= 0;
1641 FD_ZERO (&Available
);
1643 /* If read_kbd is a process to watch, set wait_proc and wait_channel
1645 if (XTYPE (read_kbd
) == Lisp_Process
)
1647 wait_proc
= XPROCESS (read_kbd
);
1648 wait_channel
= XFASTINT (wait_proc
->infd
);
1649 XFASTINT (read_kbd
) = 0;
1652 waiting_for_user_input_p
= XINT (read_kbd
);
1654 /* Since we may need to wait several times,
1655 compute the absolute time to return at. */
1656 if (time_limit
|| microsecs
)
1658 EMACS_GET_TIME (end_time
);
1659 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
1660 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
1665 /* If calling from keyboard input, do not quit
1666 since we want to return C-g as an input character.
1667 Otherwise, do pending quit if requested. */
1668 if (XINT (read_kbd
) >= 0)
1671 /* If status of something has changed, and no input is available,
1672 notify the user of the change right away */
1673 if (update_tick
!= process_tick
&& do_display
)
1675 Atemp
= input_wait_mask
;
1676 EMACS_SET_SECS_USECS (timeout
, 0, 0);
1677 if (select (MAXDESC
, &Atemp
, 0, 0, &timeout
) <= 0)
1681 /* Don't wait for output from a non-running process. */
1682 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
1683 update_status (wait_proc
);
1685 && ! EQ (wait_proc
->status
, Qrun
))
1688 /* Compute time from now till when time limit is up */
1689 /* Exit if already run out */
1690 if (time_limit
== -1)
1692 /* -1 specified for timeout means
1693 gobble output available now
1694 but don't wait at all. */
1696 EMACS_SET_SECS_USECS (timeout
, 0, 0);
1698 else if (time_limit
|| microsecs
)
1700 EMACS_GET_TIME (timeout
);
1701 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
1702 if (EMACS_TIME_NEG_P (timeout
))
1707 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
1710 /* Cause C-g and alarm signals to take immediate action,
1711 and cause input available signals to zero out timeout */
1712 if (XINT (read_kbd
) < 0)
1713 set_waiting_for_input (&timeout
);
1715 /* Wait till there is something to do */
1717 Available
= input_wait_mask
;
1718 if (! XINT (read_kbd
))
1719 FD_CLR (0, &Available
);
1721 /* If frame size has changed or the window is newly mapped,
1722 redisplay now, before we start to wait. There is a race
1723 condition here; if a SIGIO arrives between now and the select
1724 and indicates that a frame is trashed, we lose. */
1726 redisplay_preserve_echo_area ();
1728 if (XINT (read_kbd
) && detect_input_pending ())
1731 nfds
= select (MAXDESC
, &Available
, 0, 0, &timeout
);
1735 /* Make C-g and alarm signals set flags again */
1736 clear_waiting_for_input ();
1738 /* If we woke up due to SIGWINCH, actually change size now. */
1739 do_pending_window_change ();
1741 if (time_limit
&& nfds
== 0) /* timeout elapsed */
1745 if (xerrno
== EINTR
)
1746 FD_ZERO (&Available
);
1748 /* This happens for no known reason on ALLIANT.
1749 I am guessing that this is the right response. -- RMS. */
1750 else if (xerrno
== EFAULT
)
1751 FD_ZERO (&Available
);
1753 else if (xerrno
== EBADF
)
1756 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
1757 the child's closure of the pts gives the parent a SIGHUP, and
1758 the ptc file descriptor is automatically closed,
1759 yielding EBADF here or at select() call above.
1760 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
1761 in m-ibmrt-aix.h), and here we just ignore the select error.
1762 Cleanup occurs c/o status_notify after SIGCLD. */
1763 FD_ZERO (&Available
); /* Cannot depend on values returned */
1769 error("select error: %s", sys_errlist
[xerrno
]);
1772 else if (nfds
> 0 && FD_ISSET (0, &Available
) && interrupt_input
)
1773 /* System sometimes fails to deliver SIGIO. */
1774 kill (getpid (), SIGIO
);
1777 /* Check for keyboard input */
1778 /* If there is any, return immediately
1779 to give it higher priority than subprocesses */
1781 if (XINT (read_kbd
) && detect_input_pending ())
1785 /* If we think we have keyboard input waiting, but didn't get SIGIO
1786 go read it. This can happen with X on BSD after logging out.
1787 In that case, there really is no input and no SIGIO,
1788 but select says there is input. */
1791 if (XINT (read_kbd) && interrupt_input && (Available & fileno (stdin)))
1793 if (XINT (read_kbd
) && interrupt_input
&& (FD_ISSET (fileno (stdin
), &Available
)))
1798 /* Check for connection from other process */
1800 if (Available
& ChannelMask (comm_server
))
1802 Available
&= ~(ChannelMask (comm_server
));
1808 got_some_input
|= nfds
> 0;
1810 /* If checking input just got us a size-change event from X,
1811 obey it now if we should. */
1812 if (XINT (read_kbd
))
1813 do_pending_window_change ();
1815 /* Check for data from a process or a command channel */
1816 for (channel
= FIRST_PROC_DESC
; channel
< MAXDESC
; channel
++)
1818 if (FD_ISSET (channel
, &Available
))
1822 /* If waiting for this channel, arrange to return as
1823 soon as no more input to be processed. No more
1825 if (wait_channel
== channel
)
1831 proc
= chan_process
[channel
];
1836 /* It's a command channel */
1837 if (!NILP (XPROCESS (proc
)->command_channel_p
))
1839 ProcessCommChan (channel
, proc
);
1840 if (NILP (XPROCESS (proc
)->command_channel_p
))
1842 /* It has ceased to be a command channel! */
1843 int bytes_available
;
1844 if (ioctl (channel
, FIONREAD
, &bytes_available
) < 0)
1845 bytes_available
= 0;
1846 if (bytes_available
)
1847 FD_SET (channel
, &Available
);
1853 /* Read data from the process, starting with our
1854 buffered-ahead character if we have one. */
1856 nread
= read_process_output (proc
, channel
);
1859 /* Since read_process_output can run a filter,
1860 which can call accept-process-output,
1861 don't try to read from any other processes
1862 before doing the select again. */
1863 FD_ZERO (&Available
);
1866 redisplay_preserve_echo_area ();
1869 else if (nread
== -1 && errno
== EWOULDBLOCK
)
1873 else if (nread
== -1 && errno
== EAGAIN
)
1877 else if (nread
== -1 && errno
== EAGAIN
)
1879 /* Note that we cannot distinguish between no input
1880 available now and a closed pipe.
1881 With luck, a closed pipe will be accompanied by
1882 subprocess termination and SIGCHLD. */
1883 else if (nread
== 0 && !NETCONN_P (proc
))
1885 #endif /* O_NDELAY */
1886 #endif /* O_NONBLOCK */
1887 #endif /* EWOULDBLOCK */
1889 /* On some OSs with ptys, when the process on one end of
1890 a pty exits, the other end gets an error reading with
1891 errno = EIO instead of getting an EOF (0 bytes read).
1892 Therefore, if we get an error reading and errno =
1893 EIO, just continue, because the child process has
1894 exited and should clean itself up soon (e.g. when we
1896 else if (nread
== -1 && errno
== EIO
)
1898 #endif /* HAVE_PTYS */
1899 /* If we can detect process termination, don't consider the process
1900 gone just because its pipe is closed. */
1902 else if (nread
== 0 && !NETCONN_P (proc
))
1907 /* Preserve status of processes already terminated. */
1908 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
1909 deactivate_process (proc
);
1910 if (!NILP (XPROCESS (proc
)->raw_status_low
))
1911 update_status (XPROCESS (proc
));
1912 if (EQ (XPROCESS (proc
)->status
, Qrun
))
1913 XPROCESS (proc
)->status
1914 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
1917 } /* end for each file descriptor */
1918 } /* end while exit conditions not met */
1920 /* If calling from keyboard input, do not quit
1921 since we want to return C-g as an input character.
1922 Otherwise, do pending quit if requested. */
1923 if (XINT (read_kbd
) >= 0)
1925 /* Prevent input_pending from remaining set if we quit. */
1926 clear_input_pending ();
1930 return got_some_input
;
1933 /* Read pending output from the process channel,
1934 starting with our buffered-ahead character if we have one.
1935 Yield number of characters read.
1937 This function reads at most 1024 characters.
1938 If you want to read all available subprocess output,
1939 you must call it repeatedly until it returns zero. */
1941 read_process_output (proc
, channel
)
1943 register int channel
;
1945 register int nchars
;
1951 register Lisp_Object outstream
;
1952 register struct buffer
*old
= current_buffer
;
1953 register struct Lisp_Process
*p
= XPROCESS (proc
);
1954 register int opoint
;
1957 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
1959 vs
= get_vms_process_pointer (p
->pid
);
1963 return(0); /* Really weird if it does this */
1964 if (!(vs
->iosb
[0] & 1))
1965 return -1; /* I/O error */
1968 error ("Could not get VMS process pointer");
1969 chars
= vs
->inputBuffer
;
1970 nchars
= clean_vms_buffer (chars
, vs
->iosb
[1]);
1973 start_vms_process_read (vs
); /* Crank up the next read on the process */
1974 return 1; /* Nothing worth printing, say we got 1 */
1978 if (proc_buffered_char
[channel
] < 0)
1979 nchars
= read (channel
, chars
, sizeof chars
);
1982 chars
[0] = proc_buffered_char
[channel
];
1983 proc_buffered_char
[channel
] = -1;
1984 nchars
= read (channel
, chars
+ 1, sizeof chars
- 1);
1988 nchars
= nchars
+ 1;
1990 #endif /* not VMS */
1992 if (nchars
<= 0) return nchars
;
1994 outstream
= p
->filter
;
1995 if (!NILP (outstream
))
1997 /* We inhibit quit here instead of just catching it so that
1998 hitting ^G when a filter happens to be running won't screw
2000 int count
= specpdl_ptr
- specpdl
;
2001 specbind (Qinhibit_quit
, Qt
);
2002 call2 (outstream
, proc
, make_string (chars
, nchars
));
2005 start_vms_process_read (vs
);
2011 /* If no filter, write into buffer if it isn't dead. */
2012 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2016 Fset_buffer (p
->buffer
);
2019 /* Insert new output into buffer
2020 at the current end-of-output marker,
2021 thus preserving logical ordering of input and output. */
2022 if (XMARKER (p
->mark
)->buffer
)
2023 SET_PT (marker_position (p
->mark
));
2026 if (point
<= opoint
)
2029 tem
= current_buffer
->read_only
;
2030 current_buffer
->read_only
= Qnil
;
2031 /* Insert before markers in case we are inserting where
2032 the buffer's mark is, and the user's next command is Meta-y. */
2033 insert_before_markers (chars
, nchars
);
2034 current_buffer
->read_only
= tem
;
2035 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
2036 update_mode_lines
++;
2039 set_buffer_internal (old
);
2042 start_vms_process_read (vs
);
2047 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
2049 "Returns non-NIL if emacs is waiting for input from the user.\n\
2050 This is intended for use by asynchronous process output filters and sentinels.")
2053 return ((waiting_for_user_input_p
) ? Qt
: Qnil
);
2056 /* Sending data to subprocess */
2058 jmp_buf send_process_frame
;
2061 send_process_trap ()
2067 longjmp (send_process_frame
, 1);
2070 send_process (proc
, buf
, len
)
2075 /* Don't use register vars; longjmp can lose them. */
2077 unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
2081 struct Lisp_Process
*p
= XPROCESS (proc
);
2082 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2085 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2086 update_status (XPROCESS (proc
));
2087 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2088 error ("Process %s not running", procname
);
2091 vs
= get_vms_process_pointer (p
->pid
);
2093 error ("Could not find this process: %x", p
->pid
);
2094 else if (write_to_vms_process (vs
, buf
, len
))
2097 if (!setjmp (send_process_frame
))
2101 SIGTYPE (*old_sigpipe
)();
2103 /* Don't send more than 500 bytes at a time. */
2106 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
2107 rv
= write (XFASTINT (XPROCESS (proc
)->outfd
), buf
, this);
2108 signal (SIGPIPE
, old_sigpipe
);
2113 || errno
== EWOULDBLOCK
2120 /* It would be nice to accept process output here,
2121 but that is difficult. For example, it could
2122 garbage what we are sending if that is from a buffer. */
2129 report_file_error ("writing to process", Fcons (proc
, Qnil
));
2133 /* Allow input from processes between bursts of sending.
2134 Otherwise things may get stopped up. */
2139 XFASTINT (zero
) = 0;
2140 wait_reading_process_input (-1, 0, zero
, 0);
2146 XPROCESS (proc
)->raw_status_low
= Qnil
;
2147 XPROCESS (proc
)->raw_status_high
= Qnil
;
2148 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2149 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2150 deactivate_process (proc
);
2152 error ("Error writing to process %s; closed it", procname
);
2154 error ("SIGPIPE raised on process %s; closed it", procname
);
2159 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
2161 "Send current contents of region as input to PROCESS.\n\
2162 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2163 nil, indicating the current buffer's process.\n\
2164 Called from program, takes three arguments, PROCESS, START and END.\n\
2165 If the region is more than 500 characters long,\n\
2166 it is sent in several bunches. This may happen even for shorter regions.\n\
2167 Output from processes can arrive in between bunches.")
2168 (process
, start
, end
)
2169 Lisp_Object process
, start
, end
;
2174 proc
= get_process (process
);
2175 validate_region (&start
, &end
);
2177 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
2180 start1
= XINT (start
);
2181 send_process (proc
, &FETCH_CHAR (start1
), XINT (end
) - XINT (start
));
2186 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
2188 "Send PROCESS the contents of STRING as input.\n\
2189 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2190 nil, indicating the current buffer's process.\n\
2191 If STRING is more than 500 characters long,\n\
2192 it is sent in several bunches. This may happen even for shorter strings.\n\
2193 Output from processes can arrive in between bunches.")
2195 Lisp_Object process
, string
;
2198 CHECK_STRING (string
, 1);
2199 proc
= get_process (process
);
2200 send_process (proc
, XSTRING (string
)->data
, XSTRING (string
)->size
);
2204 /* send a signal number SIGNO to PROCESS.
2205 CURRENT_GROUP means send to the process group that currently owns
2206 the terminal being used to communicate with PROCESS.
2207 This is used for various commands in shell mode.
2208 If NOMSG is zero, insert signal-announcements into process's buffers
2211 process_send_signal (process
, signo
, current_group
, nomsg
)
2212 Lisp_Object process
;
2214 Lisp_Object current_group
;
2218 register struct Lisp_Process
*p
;
2222 proc
= get_process (process
);
2223 p
= XPROCESS (proc
);
2225 if (!EQ (p
->childp
, Qt
))
2226 error ("Process %s is not a subprocess",
2227 XSTRING (p
->name
)->data
);
2228 if (!XFASTINT (p
->infd
))
2229 error ("Process %s is not active",
2230 XSTRING (p
->name
)->data
);
2232 if (NILP (p
->pty_flag
))
2233 current_group
= Qnil
;
2235 /* If we are using pgrps, get a pgrp number and make it negative. */
2236 if (!NILP (current_group
))
2238 /* If possible, send signals to the entire pgrp
2239 by sending an input character to it. */
2240 #if defined (TIOCGLTC) && defined (TIOCGETC)
2247 ioctl (XFASTINT (p
->infd
), TIOCGETC
, &c
);
2248 send_process (proc
, &c
.t_intrc
, 1);
2251 ioctl (XFASTINT (p
->infd
), TIOCGETC
, &c
);
2252 send_process (proc
, &c
.t_quitc
, 1);
2256 ioctl (XFASTINT (p
->infd
), TIOCGLTC
, &lc
);
2257 send_process (proc
, &lc
.t_suspc
, 1);
2259 #endif /* SIGTSTP */
2261 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2262 /* It is possible that the following code would work
2263 on other kinds of USG systems, not just on the IRIS.
2264 This should be tried in Emacs 19. */
2270 ioctl (XFASTINT (p
->infd
), TCGETA
, &t
);
2271 send_process (proc
, &t
.c_cc
[VINTR
], 1);
2274 ioctl (XFASTINT (p
->infd
), TCGETA
, &t
);
2275 send_process (proc
, &t
.c_cc
[VQUIT
], 1);
2278 ioctl (XFASTINT (p
->infd
), TCGETA
, &t
);
2279 send_process (proc
, &t
.c_cc
[VSWTCH
], 1);
2282 #endif /* ! defined (USG) */
2285 /* Get the pgrp using the tty itself, if we have that.
2286 Otherwise, use the pty to get the pgrp.
2287 On pfa systems, saka@pfu.fujitsu.co.JP writes:
2288 "TICGPGRP symbol defined in sys/ioctl.h at E50.
2289 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
2290 His patch indicates that if TIOCGPGRP returns an error, then
2291 we should just assume that p->pid is also the process group id. */
2295 if (!NILP (p
->subtty
))
2296 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
2298 err
= ioctl (XFASTINT (p
->infd
), TIOCGPGRP
, &gid
);
2302 gid
= - XFASTINT (p
->pid
);
2303 #endif /* ! defined (pfa) */
2309 #else /* ! defined (TIOCGPGRP ) */
2310 /* Can't select pgrps on this system, so we know that
2311 the child itself heads the pgrp. */
2312 gid
= - XFASTINT (p
->pid
);
2313 #endif /* ! defined (TIOCGPGRP ) */
2316 gid
= - XFASTINT (p
->pid
);
2322 p
->raw_status_low
= Qnil
;
2323 p
->raw_status_high
= Qnil
;
2325 XSETINT (p
->tick
, ++process_tick
);
2329 #endif /* ! defined (SIGCONT) */
2332 send_process (proc
, "\003", 1); /* ^C */
2337 send_process (proc
, "\031", 1); /* ^Y */
2342 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
2345 flush_pending_output (XFASTINT (p
->infd
));
2349 /* If we don't have process groups, send the signal to the immediate
2350 subprocess. That isn't really right, but it's better than any
2351 obvious alternative. */
2354 kill (XFASTINT (p
->pid
), signo
);
2358 /* gid may be a pid, or minus a pgrp's number */
2360 if (!NILP (current_group
))
2361 ioctl (XFASTINT (p
->infd
), TIOCSIGSEND
, signo
);
2364 gid
= - XFASTINT (p
->pid
);
2367 #else /* ! defined (TIOCSIGSEND) */
2368 EMACS_KILLPG (-gid
, signo
);
2369 #endif /* ! defined (TIOCSIGSEND) */
2372 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
2373 "Interrupt process PROCESS. May be process or name of one.\n\
2374 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
2375 Nil or no arg means current buffer's process.\n\
2376 Second arg CURRENT-GROUP non-nil means send signal to\n\
2377 the current process-group of the process's controlling terminal\n\
2378 rather than to the process's own process group.\n\
2379 If the process is a shell, this means interrupt current subjob\n\
2380 rather than the shell.")
2381 (process
, current_group
)
2382 Lisp_Object process
, current_group
;
2384 process_send_signal (process
, SIGINT
, current_group
, 0);
2388 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
2389 "Kill process PROCESS. May be process or name of one.\n\
2390 See function `interrupt-process' for more details on usage.")
2391 (process
, current_group
)
2392 Lisp_Object process
, current_group
;
2394 process_send_signal (process
, SIGKILL
, current_group
, 0);
2398 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
2399 "Send QUIT signal to process PROCESS. May be process or name of one.\n\
2400 See function `interrupt-process' for more details on usage.")
2401 (process
, current_group
)
2402 Lisp_Object process
, current_group
;
2404 process_send_signal (process
, SIGQUIT
, current_group
, 0);
2408 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
2409 "Stop process PROCESS. May be process or name of one.\n\
2410 See function `interrupt-process' for more details on usage.")
2411 (process
, current_group
)
2412 Lisp_Object process
, current_group
;
2415 error ("no SIGTSTP support");
2417 process_send_signal (process
, SIGTSTP
, current_group
, 0);
2422 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
2423 "Continue process PROCESS. May be process or name of one.\n\
2424 See function `interrupt-process' for more details on usage.")
2425 (process
, current_group
)
2426 Lisp_Object process
, current_group
;
2429 process_send_signal (process
, SIGCONT
, current_group
, 0);
2431 error ("no SIGCONT support");
2436 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
2437 2, 2, "nProcess number: \nnSignal code: ",
2438 "Send the process with number PID the signal with code CODE.\n\
2439 Both PID and CODE are integers.")
2441 Lisp_Object pid
, sig
;
2443 CHECK_NUMBER (pid
, 0);
2444 CHECK_NUMBER (sig
, 1);
2445 return make_number (kill (XINT (pid
), XINT (sig
)));
2448 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
2449 "Make PROCESS see end-of-file in its input.\n\
2450 Eof comes after any text already sent to it.\n\
2451 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2452 nil, indicating the current buffer's process.")
2454 Lisp_Object process
;
2458 proc
= get_process (process
);
2459 /* Sending a zero-length record is supposed to mean eof
2460 when TIOCREMOTE is turned on. */
2464 write (XFASTINT (XPROCESS (proc
)->outfd
), buf
, 0);
2466 #else /* did not do TOICREMOTE */
2468 send_process (proc
, "\032", 1); /* ^z */
2470 if (!NILP (XPROCESS (proc
)->pty_flag
))
2471 send_process (proc
, "\004", 1);
2474 close (XPROCESS (proc
)->outfd
);
2475 XFASTINT (XPROCESS (proc
)->outfd
) = open ("/dev/null", O_WRONLY
);
2478 #endif /* did not do TOICREMOTE */
2482 /* Kill all processes associated with `buffer'.
2483 If `buffer' is nil, kill all processes */
2485 kill_buffer_processes (buffer
)
2488 Lisp_Object tail
, proc
;
2490 for (tail
= Vprocess_alist
; XGCTYPE (tail
) == Lisp_Cons
;
2491 tail
= XCONS (tail
)->cdr
)
2493 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
2494 if (XGCTYPE (proc
) == Lisp_Process
2495 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
2497 if (NETCONN_P (proc
))
2498 deactivate_process (proc
);
2499 else if (XFASTINT (XPROCESS (proc
)->infd
))
2500 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
2505 /* On receipt of a signal that a child status has changed,
2506 loop asking about children with changed statuses until
2507 the system says there are no more.
2508 All we do is change the status;
2509 we do not run sentinels or print notifications.
2510 That is saved for the next time keyboard input is done,
2511 in order to avoid timing errors. */
2513 /** WARNING: this can be called during garbage collection.
2514 Therefore, it must not be fooled by the presence of mark bits in
2517 /** USG WARNING: Although it is not obvious from the documentation
2518 in signal(2), on a USG system the SIGCLD handler MUST NOT call
2519 signal() before executing at least one wait(), otherwise the handler
2520 will be called again, resulting in an infinite loop. The relevant
2521 portion of the documentation reads "SIGCLD signals will be queued
2522 and the signal-catching function will be continually reentered until
2523 the queue is empty". Invoking signal() causes the kernel to reexamine
2524 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
2527 sigchld_handler (signo
)
2530 int old_errno
= errno
;
2532 register struct Lisp_Process
*p
;
2536 sigheld
|= sigbit (SIGCHLD
);
2548 #endif /* no WUNTRACED */
2549 /* Keep trying to get a status until we get a definitive result. */
2553 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
2555 while (pid
<= 0 && errno
== EINTR
);
2559 /* A real failure. We have done all our job, so return. */
2561 /* USG systems forget handlers when they are used;
2562 must reestablish each time */
2564 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
2567 sigheld
&= ~sigbit (SIGCHLD
);
2575 #endif /* no WNOHANG */
2577 /* Find the process that signaled us, and record its status. */
2580 for (tail
= Vprocess_alist
; XSYMBOL (tail
) != XSYMBOL (Qnil
); tail
= XCONS (tail
)->cdr
)
2582 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
2583 p
= XPROCESS (proc
);
2584 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
2589 /* Look for an asynchronous process whose pid hasn't been filled
2592 for (tail
= Vprocess_alist
; XSYMBOL (tail
) != XSYMBOL (Qnil
); tail
= XCONS (tail
)->cdr
)
2594 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
2595 p
= XPROCESS (proc
);
2596 if (XTYPE (p
->pid
) == Lisp_Int
&& XINT (p
->pid
) == -1)
2601 /* Change the status of the process that was found. */
2604 union { int i
; WAITTYPE wt
; } u
;
2606 XSETINT (p
->tick
, ++process_tick
);
2608 XFASTINT (p
->raw_status_low
) = u
.i
& 0xffff;
2609 XFASTINT (p
->raw_status_high
) = u
.i
>> 16;
2611 /* If process has terminated, stop waiting for its output. */
2612 if (WIFSIGNALED (w
) || WIFEXITED (w
))
2614 FD_CLR (p
->infd
, &input_wait_mask
);
2617 /* There was no asynchronous process found for that id. Check
2618 if we have a synchronous process. */
2621 synch_process_alive
= 0;
2623 /* Report the status of the synchronous process. */
2625 synch_process_retcode
= WRETCODE (w
);
2626 else if (WIFSIGNALED (w
))
2627 synch_process_death
= sys_siglist
[WTERMSIG (w
)];
2630 /* On some systems, we must return right away.
2631 If any more processes want to signal us, we will
2633 Otherwise (on systems that have WNOHANG), loop around
2634 to use up all the processes that have something to tell us. */
2635 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG))
2637 signal (signo
, sigchld_handler
);
2641 #endif /* USG, but not HPUX with WNOHANG */
2647 exec_sentinel_unwind (data
)
2650 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
2655 exec_sentinel (proc
, reason
)
2656 Lisp_Object proc
, reason
;
2658 Lisp_Object sentinel
;
2659 register struct Lisp_Process
*p
= XPROCESS (proc
);
2660 int count
= specpdl_ptr
- specpdl
;
2662 sentinel
= p
->sentinel
;
2663 if (NILP (sentinel
))
2666 /* Zilch the sentinel while it's running, to avoid recursive invocations;
2667 assure that it gets restored no matter how the sentinel exits. */
2669 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
2670 /* Inhibit quit so that random quits don't screw up a running filter. */
2671 specbind (Qinhibit_quit
, Qt
);
2672 call2 (sentinel
, proc
, reason
);
2676 /* Report all recent events of a change in process status
2677 (either run the sentinel or output a message).
2678 This is done while Emacs is waiting for keyboard input. */
2682 register Lisp_Object proc
, buffer
;
2683 Lisp_Object tail
= Qnil
;
2684 Lisp_Object msg
= Qnil
;
2685 struct gcpro gcpro1
, gcpro2
;
2687 /* We need to gcpro tail; if read_process_output calls a filter
2688 which deletes a process and removes the cons to which tail points
2689 from Vprocess_alist, and then causes a GC, tail is an unprotected
2693 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
2696 register struct Lisp_Process
*p
;
2698 proc
= Fcdr (Fcar (tail
));
2699 p
= XPROCESS (proc
);
2701 if (XINT (p
->tick
) != XINT (p
->update_tick
))
2703 XSETINT (p
->update_tick
, XINT (p
->tick
));
2705 /* If process is still active, read any output that remains. */
2706 if (XFASTINT (p
->infd
))
2707 while (read_process_output (proc
, XFASTINT (p
->infd
)) > 0);
2711 /* Get the text to use for the message. */
2712 if (!NILP (p
->raw_status_low
))
2714 msg
= status_message (p
->status
);
2716 /* If process is terminated, deactivate it or delete it. */
2718 if (XTYPE (p
->status
) == Lisp_Cons
)
2719 symbol
= XCONS (p
->status
)->car
;
2721 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
2722 || EQ (symbol
, Qclosed
))
2724 if (delete_exited_processes
)
2725 remove_process (proc
);
2727 deactivate_process (proc
);
2730 /* Now output the message suitably. */
2731 if (!NILP (p
->sentinel
))
2732 exec_sentinel (proc
, msg
);
2733 /* Don't bother with a message in the buffer
2734 when a process becomes runnable. */
2735 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
2737 Lisp_Object ro
= XBUFFER (buffer
)->read_only
;
2739 struct buffer
*old
= current_buffer
;
2742 /* Avoid error if buffer is deleted
2743 (probably that's why the process is dead, too) */
2744 if (NILP (XBUFFER (buffer
)->name
))
2746 Fset_buffer (buffer
);
2748 /* Insert new output into buffer
2749 at the current end-of-output marker,
2750 thus preserving logical ordering of input and output. */
2751 if (XMARKER (p
->mark
)->buffer
)
2752 SET_PT (marker_position (p
->mark
));
2755 if (point
<= opoint
)
2756 opoint
+= XSTRING (msg
)->size
+ XSTRING (p
->name
)->size
+ 10;
2758 tem
= current_buffer
->read_only
;
2759 current_buffer
->read_only
= Qnil
;
2760 insert_string ("\nProcess ");
2761 Finsert (1, &p
->name
);
2762 insert_string (" ");
2764 current_buffer
->read_only
= tem
;
2765 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
2768 set_buffer_internal (old
);
2773 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
2774 redisplay_preserve_echo_area ();
2776 update_tick
= process_tick
;
2787 if (! noninteractive
|| initialized
)
2789 signal (SIGCHLD
, sigchld_handler
);
2792 FD_ZERO (&input_wait_mask
);
2793 FD_SET (0, &input_wait_mask
);
2794 Vprocess_alist
= Qnil
;
2795 for (i
= 0; i
< MAXDESC
; i
++)
2797 chan_process
[i
] = Qnil
;
2798 proc_buffered_char
[i
] = -1;
2802 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 0, 1, 0,
2803 "Return the connection type of `PROCESS'. This can be nil (pipe),\n\
2804 t or pty (pty) or stream (socket connection).")
2806 Lisp_Object process
;
2808 return XPROCESS (process
)->type
;
2814 pty_process
= intern ("pty");
2817 stream_process
= intern ("stream");
2819 Qprocessp
= intern ("processp");
2820 staticpro (&Qprocessp
);
2821 Qrun
= intern ("run");
2823 Qstop
= intern ("stop");
2825 Qsignal
= intern ("signal");
2826 staticpro (&Qsignal
);
2828 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
2831 Qexit = intern ("exit");
2832 staticpro (&Qexit); */
2834 Qopen
= intern ("open");
2836 Qclosed
= intern ("closed");
2837 staticpro (&Qclosed
);
2839 staticpro (&Vprocess_alist
);
2841 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
2842 "*Non-nil means delete processes immediately when they exit.\n\
2843 nil means don't delete them until `list-processes' is run.");
2845 delete_exited_processes
= 1;
2847 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
2848 "Control type of device used to communicate with subprocesses.\n\
2849 Values are nil to use a pipe, and t or 'pty for a pty. Note that if\n\
2850 pty's are not available, this variable will be ignored. The value takes\n\
2851 effect when `start-process' is called.");
2852 Vprocess_connection_type
= Qt
;
2854 defsubr (&Sprocessp
);
2855 defsubr (&Sget_process
);
2856 defsubr (&Sget_buffer_process
);
2857 defsubr (&Sdelete_process
);
2858 defsubr (&Sprocess_status
);
2859 defsubr (&Sprocess_exit_status
);
2860 defsubr (&Sprocess_id
);
2861 defsubr (&Sprocess_name
);
2862 defsubr (&Sprocess_command
);
2863 defsubr (&Sset_process_buffer
);
2864 defsubr (&Sprocess_buffer
);
2865 defsubr (&Sprocess_mark
);
2866 defsubr (&Sset_process_filter
);
2867 defsubr (&Sprocess_filter
);
2868 defsubr (&Sset_process_sentinel
);
2869 defsubr (&Sprocess_sentinel
);
2870 defsubr (&Sprocess_kill_without_query
);
2871 defsubr (&Slist_processes
);
2872 defsubr (&Sprocess_list
);
2873 defsubr (&Sstart_process
);
2875 defsubr (&Sopen_network_stream
);
2876 #endif /* HAVE_SOCKETS */
2877 defsubr (&Saccept_process_output
);
2878 defsubr (&Sprocess_send_region
);
2879 defsubr (&Sprocess_send_string
);
2880 defsubr (&Sinterrupt_process
);
2881 defsubr (&Skill_process
);
2882 defsubr (&Squit_process
);
2883 defsubr (&Sstop_process
);
2884 defsubr (&Scontinue_process
);
2885 defsubr (&Sprocess_send_eof
);
2886 defsubr (&Ssignal_process
);
2887 defsubr (&Swaiting_for_user_input_p
);
2888 /* defsubr (&Sprocess_connection); */
2892 #else /* not subprocesses */
2894 #include <sys/types.h>
2898 #include "systime.h"
2899 #include "termopts.h"
2901 extern int frame_garbaged
;
2904 /* As described above, except assuming that there are no subprocesses:
2906 Wait for timeout to elapse and/or keyboard input to be available.
2909 timeout in seconds, or
2910 zero for no limit, or
2911 -1 means gobble data immediately available but don't wait for any.
2913 read_kbd is a Lisp_Object:
2914 0 to ignore keyboard input, or
2915 1 to return when input is available, or
2916 -1 means caller will actually read the input, so don't throw to
2918 We know that read_kbd will never be a Lisp_Process, since
2919 `subprocesses' isn't defined.
2921 do_display != 0 means redisplay should be done to show subprocess
2922 output that arrives. This version of the function ignores it.
2924 Return true iff we recieved input from any process. */
2927 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
2928 int time_limit
, microsecs
;
2929 Lisp_Object read_kbd
;
2932 EMACS_TIME end_time
, timeout
, *timeout_p
;
2935 /* What does time_limit really mean? */
2936 if (time_limit
|| microsecs
)
2938 /* It's not infinite. */
2939 timeout_p
= &timeout
;
2941 if (time_limit
== -1)
2942 /* In fact, it's zero. */
2943 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2945 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
2947 /* How far in the future is that? */
2948 EMACS_GET_TIME (end_time
);
2949 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
2952 /* It's infinite. */
2955 /* Turn off periodic alarms (in case they are in use)
2956 because the select emulator uses alarms. */
2963 waitchannels
= XINT (read_kbd
) ? 1 : 0;
2965 /* If calling from keyboard input, do not quit
2966 since we want to return C-g as an input character.
2967 Otherwise, do pending quit if requested. */
2968 if (XINT (read_kbd
) >= 0)
2973 EMACS_GET_TIME (*timeout_p
);
2974 EMACS_SUB_TIME (*timeout_p
, end_time
, *timeout_p
);
2975 if (EMACS_TIME_NEG_P (*timeout_p
))
2979 /* Cause C-g and alarm signals to take immediate action,
2980 and cause input available signals to zero out timeout. */
2981 if (XINT (read_kbd
) < 0)
2982 set_waiting_for_input (&timeout
);
2984 /* If a frame has been newly mapped and needs updating,
2985 reprocess its display stuff. */
2987 redisplay_preserve_echo_area ();
2989 if (XINT (read_kbd
) && detect_input_pending ())
2992 nfds
= select (1, &waitchannels
, 0, 0, timeout_p
);
2994 /* Make C-g and alarm signals set flags again */
2995 clear_waiting_for_input ();
2997 /* If we woke up due to SIGWINCH, actually change size now. */
2998 do_pending_window_change ();
3002 /* If the system call was interrupted, then go around the
3008 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
3009 /* System sometimes fails to deliver SIGIO. */
3010 kill (getpid (), SIGIO
);
3012 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
3015 /* If we have timed out (nfds == 0) or found some input (nfds > 0),
3025 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
3026 "Return the (or, a) process associated with BUFFER.\n\
3027 This copy of Emacs has not been built to support subprocesses, so this\n\
3028 function always returns nil.")
3030 register Lisp_Object name
;
3035 /* Kill all processes associated with `buffer'.
3036 If `buffer' is nil, kill all processes.
3037 Since we have no subprocesses, this does nothing. */
3039 kill_buffer_processes (buffer
)
3050 defsubr (&Sget_buffer_process
);
3054 #endif /* not subprocesses */