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 */
48 #endif /* not WINDOWSNT */
50 #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */
51 #include <sys/socket.h>
53 #include <netinet/in.h>
54 #include <arpa/inet.h>
55 #endif /* HAVE_SOCKETS */
57 /* TERM is a poor-man's SLIP, used on Linux. */
62 /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */
63 #ifdef HAVE_BROKEN_INET_ADDR
64 #define IN_ADDR struct in_addr
65 #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1)
67 #define IN_ADDR unsigned long
68 #define NUMERIC_ADDR_ERROR (numeric_addr == -1)
71 #if defined(BSD) || defined(STRIDE)
72 #include <sys/ioctl.h>
73 #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5)
75 #endif /* HAVE_PTYS and no O_NDELAY */
76 #endif /* BSD or STRIDE */
78 #ifdef BROKEN_O_NONBLOCK
80 #endif /* BROKEN_O_NONBLOCK */
87 #include <sys/sysmacros.h> /* for "minor" */
97 #include "termhooks.h"
102 Lisp_Object Qprocessp
;
103 Lisp_Object Qrun
, Qstop
, Qsignal
, Qopen
, Qclosed
;
104 Lisp_Object Qlast_nonmenu_event
;
105 /* Qexit is declared and initialized in eval.c. */
107 /* a process object is a network connection when its childp field is neither
108 Qt nor Qnil but is instead a string (name of foreign host we
109 are connected to + name of port we are connected to) */
112 static Lisp_Object stream_process
;
114 #define NETCONN_P(p) (GC_STRINGP (XPROCESS (p)->childp))
116 #define NETCONN_P(p) 0
117 #endif /* HAVE_SOCKETS */
119 /* Define first descriptor number available for subprocesses. */
121 #define FIRST_PROC_DESC 1
123 #define FIRST_PROC_DESC 3
126 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
129 #if !defined (SIGCHLD) && defined (SIGCLD)
130 #define SIGCHLD SIGCLD
133 #include "syssignal.h"
138 extern char *strerror ();
140 extern char *sys_errlist
[];
147 #ifndef SYS_SIGLIST_DECLARED
152 extern char *sys_siglist
[];
153 #endif /* not LINUX */
155 char *sys_siglist
[] =
161 "illegal instruction",
165 "floating point exception",
168 "segmentation violation",
169 "bad argument to system call",
170 "write on a pipe with no one to read it",
172 "software termination signal from kill",
174 "sendable stop signal not from tty",
175 "stop signal from tty",
176 "continue a stopped process",
177 "child status has changed",
178 "background read attempted from control tty",
179 "background write attempted from control tty",
180 "input record available at control tty",
181 "exceeded CPU time limit",
182 "exceeded file size limit"
184 #endif /* not WINDOWSNT */
187 #endif /* ! SYS_SIGLIST_DECLARED */
189 /* t means use pty, nil means use a pipe,
190 maybe other values to come. */
191 static Lisp_Object Vprocess_connection_type
;
195 #include <sys/socket.h>
199 /* These next two vars are non-static since sysdep.c uses them in the
200 emulation of `select'. */
201 /* Number of events of change of status of a process. */
203 /* Number of events for which the user or sentinel has been notified. */
206 #include "sysselect.h"
208 /* If we support X Windows, turn on the code to poll periodically
209 to detect C-g. It isn't actually used when doing interrupt input. */
210 #ifdef HAVE_X_WINDOWS
211 #define POLL_FOR_INPUT
214 /* Mask of bits indicating the descriptors that we wait for input on. */
216 static SELECT_TYPE input_wait_mask
;
218 /* Mask that excludes keyboard input descriptor (s). */
220 static SELECT_TYPE non_keyboard_wait_mask
;
222 /* The largest descriptor currently in use for a process object. */
223 static int max_process_desc
;
225 /* The largest descriptor currently in use for keyboard input. */
226 static int max_keyboard_desc
;
228 /* Nonzero means delete a process right away if it exits. */
229 static int delete_exited_processes
;
231 /* Indexed by descriptor, gives the process (if any) for that descriptor */
232 Lisp_Object chan_process
[MAXDESC
];
234 /* Alist of elements (NAME . PROCESS) */
235 Lisp_Object Vprocess_alist
;
237 /* Buffered-ahead input char from process, indexed by channel.
238 -1 means empty (no char is buffered).
239 Used on sys V where the only way to tell if there is any
240 output from the process is to read at least one char.
241 Always -1 on systems that support FIONREAD. */
243 /* Don't make static; need to access externally. */
244 int proc_buffered_char
[MAXDESC
];
246 static Lisp_Object
get_process ();
248 /* Maximum number of bytes to send to a pty without an eof. */
249 static int pty_max_bytes
;
251 /* Open an available pty, returning a file descriptor.
252 Return -1 on failure.
253 The file name of the terminal corresponding to the pty
254 is left in the variable pty_name. */
256 static char pty_name
[24];
258 /* Compute the Lisp form of the process status, p->status, from
259 the numeric status that was returned by `wait'. */
261 Lisp_Object
status_convert ();
264 struct Lisp_Process
*p
;
266 union { int i
; WAITTYPE wt
; } u
;
267 u
.i
= XFASTINT (p
->raw_status_low
) + (XFASTINT (p
->raw_status_high
) << 16);
268 p
->status
= status_convert (u
.wt
);
269 p
->raw_status_low
= Qnil
;
270 p
->raw_status_high
= Qnil
;
273 /* Convert a process status word in Unix format to
274 the list that we use internally. */
281 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
282 else if (WIFEXITED (w
))
283 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
284 WCOREDUMP (w
) ? Qt
: Qnil
));
285 else if (WIFSIGNALED (w
))
286 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
287 WCOREDUMP (w
) ? Qt
: Qnil
));
292 /* Given a status-list, extract the three pieces of information
293 and store them individually through the three pointers. */
296 decode_status (l
, symbol
, code
, coredump
)
312 *symbol
= XCONS (l
)->car
;
313 tem
= XCONS (l
)->cdr
;
314 *code
= XFASTINT (XCONS (tem
)->car
);
315 tem
= XCONS (tem
)->cdr
;
316 *coredump
= !NILP (tem
);
320 /* Return a string describing a process status list. */
323 status_message (status
)
328 Lisp_Object string
, string2
;
330 decode_status (status
, &symbol
, &code
, &coredump
);
332 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
338 /* Cast to suppress warning if the table has const char *. */
339 signame
= (char *) sys_siglist
[code
];
341 signame
= sys_errlist
[code
];
346 string
= build_string (signame
);
347 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
348 XSTRING (string
)->data
[0] = DOWNCASE (XSTRING (string
)->data
[0]);
349 return concat2 (string
, string2
);
351 else if (EQ (symbol
, Qexit
))
354 return build_string ("finished\n");
355 string
= Fnumber_to_string (make_number (code
));
356 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
357 return concat2 (build_string ("exited abnormally with code "),
358 concat2 (string
, string2
));
361 return Fcopy_sequence (Fsymbol_name (symbol
));
373 /* Some systems name their pseudoterminals so that there are gaps in
374 the usual sequence - for example, on HP9000/S700 systems, there
375 are no pseudoterminals with names ending in 'f'. So we wait for
376 three failures in a row before deciding that we've reached the
378 int failed_count
= 0;
383 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
384 for (i
= 0; i
< 16; i
++)
387 #ifdef PTY_NAME_SPRINTF
390 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
391 #endif /* no PTY_NAME_SPRINTF */
395 #else /* no PTY_OPEN */
397 /* Unusual IRIS code */
398 *ptyv
= open ("/dev/ptc", O_RDWR
| O_NDELAY
, 0);
401 if (fstat (fd
, &stb
) < 0)
404 if (stat (pty_name
, &stb
) < 0)
407 if (failed_count
>= 3)
413 fd
= open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
415 fd
= open (pty_name
, O_RDWR
| O_NDELAY
, 0);
417 #endif /* not IRIS */
418 #endif /* no PTY_OPEN */
422 /* check to make certain that both sides are available
423 this avoids a nasty yet stupid bug in rlogins */
424 #ifdef PTY_TTY_NAME_SPRINTF
427 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
428 #endif /* no PTY_TTY_NAME_SPRINTF */
430 if (access (pty_name
, 6) != 0)
433 #if !defined(IRIS) && !defined(__sgi)
439 #endif /* not UNIPLUS */
446 #endif /* HAVE_PTYS */
452 struct Lisp_Vector
*vec
;
453 register Lisp_Object val
, tem
, name1
;
454 register struct Lisp_Process
*p
;
458 vec
= allocate_vectorlike ((EMACS_INT
) VECSIZE (struct Lisp_Process
));
459 for (i
= 0; i
< VECSIZE (struct Lisp_Process
); i
++)
460 vec
->contents
[i
] = Qnil
;
461 vec
->size
= VECSIZE (struct Lisp_Process
);
462 p
= (struct Lisp_Process
*)vec
;
464 XSETINT (p
->infd
, -1);
465 XSETINT (p
->outfd
, -1);
466 XSETFASTINT (p
->pid
, 0);
467 XSETFASTINT (p
->tick
, 0);
468 XSETFASTINT (p
->update_tick
, 0);
469 p
->raw_status_low
= Qnil
;
470 p
->raw_status_high
= Qnil
;
472 p
->mark
= Fmake_marker ();
474 /* If name is already in use, modify it until it is unused. */
479 tem
= Fget_process (name1
);
480 if (NILP (tem
)) break;
481 sprintf (suffix
, "<%d>", i
);
482 name1
= concat2 (name
, build_string (suffix
));
486 XSETPROCESS (val
, p
);
487 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
491 remove_process (proc
)
492 register Lisp_Object proc
;
494 register Lisp_Object pair
;
496 pair
= Frassq (proc
, Vprocess_alist
);
497 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
498 Fset_marker (XPROCESS (proc
)->mark
, Qnil
, Qnil
);
500 deactivate_process (proc
);
503 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
504 "Return t if OBJECT is a process.")
508 return PROCESSP (obj
) ? Qt
: Qnil
;
511 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
512 "Return the process named NAME, or nil if there is none.")
514 register Lisp_Object name
;
518 CHECK_STRING (name
, 0);
519 return Fcdr (Fassoc (name
, Vprocess_alist
));
522 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
523 "Return the (or, a) process associated with BUFFER.\n\
524 BUFFER may be a buffer or the name of one.")
526 register Lisp_Object name
;
528 register Lisp_Object buf
, tail
, proc
;
530 if (NILP (name
)) return Qnil
;
531 buf
= Fget_buffer (name
);
532 if (NILP (buf
)) return Qnil
;
534 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
536 proc
= Fcdr (Fcar (tail
));
537 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
543 /* This is how commands for the user decode process arguments. It
544 accepts a process, a process name, a buffer, a buffer name, or nil.
545 Buffers denote the first process in the buffer, and nil denotes the
550 register Lisp_Object name
;
552 register Lisp_Object proc
, obj
;
555 obj
= Fget_process (name
);
557 obj
= Fget_buffer (name
);
559 error ("Process %s does not exist", XSTRING (name
)->data
);
561 else if (NILP (name
))
562 obj
= Fcurrent_buffer ();
566 /* Now obj should be either a buffer object or a process object.
570 proc
= Fget_buffer_process (obj
);
572 error ("Buffer %s has no process", XSTRING (XBUFFER (obj
)->name
)->data
);
576 CHECK_PROCESS (obj
, 0);
582 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
583 "Delete PROCESS: kill it and forget about it immediately.\n\
584 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
585 nil, indicating the current buffer's process.")
587 register Lisp_Object proc
;
589 proc
= get_process (proc
);
590 XPROCESS (proc
)->raw_status_low
= Qnil
;
591 XPROCESS (proc
)->raw_status_high
= Qnil
;
592 if (NETCONN_P (proc
))
594 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
595 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
597 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
599 Fkill_process (proc
, Qnil
);
600 /* Do this now, since remove_process will make sigchld_handler do nothing. */
601 XPROCESS (proc
)->status
602 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
603 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
606 remove_process (proc
);
610 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
611 "Return the status of PROCESS: a symbol, one of these:\n\
612 run -- for a process that is running.\n\
613 stop -- for a process stopped but continuable.\n\
614 exit -- for a process that has exited.\n\
615 signal -- for a process that has got a fatal signal.\n\
616 open -- for a network stream connection that is open.\n\
617 closed -- for a network stream connection that is closed.\n\
618 nil -- if arg is a process name and no such process exists.\n\
619 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
620 nil, indicating the current buffer's process.")
622 register Lisp_Object proc
;
624 register struct Lisp_Process
*p
;
625 register Lisp_Object status
;
628 proc
= Fget_process (proc
);
630 proc
= get_process (proc
);
636 if (!NILP (p
->raw_status_low
))
640 status
= XCONS (status
)->car
;
641 if (NETCONN_P (proc
))
643 if (EQ (status
, Qrun
))
645 else if (EQ (status
, Qexit
))
651 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
653 "Return the exit status of PROCESS or the signal number that killed it.\n\
654 If PROCESS has not yet exited or died, return 0.")
656 register Lisp_Object proc
;
658 CHECK_PROCESS (proc
, 0);
659 if (!NILP (XPROCESS (proc
)->raw_status_low
))
660 update_status (XPROCESS (proc
));
661 if (CONSP (XPROCESS (proc
)->status
))
662 return XCONS (XCONS (XPROCESS (proc
)->status
)->cdr
)->car
;
663 return make_number (0);
666 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
667 "Return the process id of PROCESS.\n\
668 This is the pid of the Unix process which PROCESS uses or talks to.\n\
669 For a network connection, this value is nil.")
671 register Lisp_Object proc
;
673 CHECK_PROCESS (proc
, 0);
674 return XPROCESS (proc
)->pid
;
677 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
678 "Return the name of PROCESS, as a string.\n\
679 This is the name of the program invoked in PROCESS,\n\
680 possibly modified to make it unique among process names.")
682 register Lisp_Object proc
;
684 CHECK_PROCESS (proc
, 0);
685 return XPROCESS (proc
)->name
;
688 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
689 "Return the command that was executed to start PROCESS.\n\
690 This is a list of strings, the first string being the program executed\n\
691 and the rest of the strings being the arguments given to it.\n\
692 For a non-child channel, this is nil.")
694 register Lisp_Object proc
;
696 CHECK_PROCESS (proc
, 0);
697 return XPROCESS (proc
)->command
;
700 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
701 "Return the name of the terminal PROCESS uses, or nil if none.\n\
702 This is the terminal that the process itself reads and writes on,\n\
703 not the name of the pty that Emacs uses to talk with that terminal.")
705 register Lisp_Object proc
;
707 CHECK_PROCESS (proc
, 0);
708 return XPROCESS (proc
)->tty_name
;
711 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
713 "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).")
715 register Lisp_Object proc
, buffer
;
717 CHECK_PROCESS (proc
, 0);
719 CHECK_BUFFER (buffer
, 1);
720 XPROCESS (proc
)->buffer
= buffer
;
724 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
726 "Return the buffer PROCESS is associated with.\n\
727 Output from PROCESS is inserted in this buffer\n\
728 unless PROCESS has a filter.")
730 register Lisp_Object proc
;
732 CHECK_PROCESS (proc
, 0);
733 return XPROCESS (proc
)->buffer
;
736 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
738 "Return the marker for the end of the last output from PROCESS.")
740 register Lisp_Object proc
;
742 CHECK_PROCESS (proc
, 0);
743 return XPROCESS (proc
)->mark
;
746 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
748 "Give PROCESS the filter function FILTER; nil means no filter.\n\
749 t means stop accepting output from the process.\n\
750 When a process has a filter, each time it does output\n\
751 the entire string of output is passed to the filter.\n\
752 The filter gets two arguments: the process and the string of output.\n\
753 If the process has a filter, its buffer is not used for output.")
755 register Lisp_Object proc
, filter
;
757 CHECK_PROCESS (proc
, 0);
760 FD_CLR (XINT (XPROCESS (proc
)->infd
), &input_wait_mask
);
761 FD_CLR (XINT (XPROCESS (proc
)->infd
), &non_keyboard_wait_mask
);
763 else if (EQ (XPROCESS (proc
)->filter
, Qt
))
765 FD_SET (XINT (XPROCESS (proc
)->infd
), &input_wait_mask
);
766 FD_SET (XINT (XPROCESS (proc
)->infd
), &non_keyboard_wait_mask
);
768 XPROCESS (proc
)->filter
= filter
;
772 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
774 "Returns the filter function of PROCESS; nil if none.\n\
775 See `set-process-filter' for more info on filter functions.")
777 register Lisp_Object proc
;
779 CHECK_PROCESS (proc
, 0);
780 return XPROCESS (proc
)->filter
;
783 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
785 "Give PROCESS the sentinel SENTINEL; nil for none.\n\
786 The sentinel is called as a function when the process changes state.\n\
787 It gets two arguments: the process, and a string describing the change.")
789 register Lisp_Object proc
, sentinel
;
791 CHECK_PROCESS (proc
, 0);
792 XPROCESS (proc
)->sentinel
= sentinel
;
796 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
798 "Return the sentinel of PROCESS; nil if none.\n\
799 See `set-process-sentinel' for more info on sentinels.")
801 register Lisp_Object proc
;
803 CHECK_PROCESS (proc
, 0);
804 return XPROCESS (proc
)->sentinel
;
807 DEFUN ("set-process-window-size", Fset_process_window_size
,
808 Sset_process_window_size
, 3, 3, 0,
809 "Tell PROCESS that it has logical window size HEIGHT and WIDTH.")
810 (proc
, height
, width
)
811 register Lisp_Object proc
, height
, width
;
813 CHECK_PROCESS (proc
, 0);
814 CHECK_NATNUM (height
, 0);
815 CHECK_NATNUM (width
, 0);
816 if (set_window_size (XINT (XPROCESS (proc
)->infd
),
817 XINT (height
), XINT(width
)) <= 0)
823 DEFUN ("process-kill-without-query", Fprocess_kill_without_query
,
824 Sprocess_kill_without_query
, 1, 2, 0,
825 "Say no query needed if PROCESS is running when Emacs is exited.\n\
826 Optional second argument if non-nil says to require a query.\n\
827 Value is t if a query was formerly required.")
829 register Lisp_Object proc
, value
;
833 CHECK_PROCESS (proc
, 0);
834 tem
= XPROCESS (proc
)->kill_without_query
;
835 XPROCESS (proc
)->kill_without_query
= Fnull (value
);
840 #if 0 /* Turned off because we don't currently record this info
841 in the process. Perhaps add it. */
842 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
843 "Return the connection type of `PROCESS'.\n\
844 The value is `nil' for a pipe,\n\
845 `t' or `pty' for a pty, or `stream' for a socket connection.")
849 return XPROCESS (process
)->type
;
856 register Lisp_Object tail
, tem
;
857 Lisp_Object proc
, minspace
, tem1
;
858 register struct buffer
*old
= current_buffer
;
859 register struct Lisp_Process
*p
;
863 XSETFASTINT (minspace
, 1);
865 set_buffer_internal (XBUFFER (Vstandard_output
));
866 Fbuffer_disable_undo (Vstandard_output
);
868 current_buffer
->truncate_lines
= Qt
;
871 Proc Status Buffer Tty Command\n\
872 ---- ------ ------ --- -------\n", -1);
874 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
878 proc
= Fcdr (Fcar (tail
));
880 if (NILP (p
->childp
))
883 Finsert (1, &p
->name
);
884 Findent_to (make_number (13), minspace
);
886 if (!NILP (p
->raw_status_low
))
889 if (CONSP (p
->status
))
890 symbol
= XCONS (p
->status
)->car
;
893 if (EQ (symbol
, Qsignal
))
896 tem
= Fcar (Fcdr (p
->status
));
898 if (XINT (tem
) < NSIG
)
899 write_string (sys_errlist
[XINT (tem
)], -1);
902 Fprinc (symbol
, Qnil
);
904 else if (NETCONN_P (proc
))
906 if (EQ (symbol
, Qrun
))
907 write_string ("open", -1);
908 else if (EQ (symbol
, Qexit
))
909 write_string ("closed", -1);
911 Fprinc (symbol
, Qnil
);
914 Fprinc (symbol
, Qnil
);
916 if (EQ (symbol
, Qexit
))
919 tem
= Fcar (Fcdr (p
->status
));
922 sprintf (tembuf
, " %d", XFASTINT (tem
));
923 write_string (tembuf
, -1);
927 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
928 remove_process (proc
);
930 Findent_to (make_number (22), minspace
);
931 if (NILP (p
->buffer
))
932 insert_string ("(none)");
933 else if (NILP (XBUFFER (p
->buffer
)->name
))
934 insert_string ("(Killed)");
936 Finsert (1, &XBUFFER (p
->buffer
)->name
);
938 Findent_to (make_number (37), minspace
);
940 if (STRINGP (p
->tty_name
))
941 Finsert (1, &p
->tty_name
);
943 insert_string ("(none)");
945 Findent_to (make_number (49), minspace
);
947 if (NETCONN_P (proc
))
949 sprintf (tembuf
, "(network stream connection to %s)\n",
950 XSTRING (p
->childp
)->data
);
951 insert_string (tembuf
);
965 insert_string ("\n");
971 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 0, "",
972 "Display a list of all processes.\n\
973 \(Any processes listed as Exited or Signaled are actually eliminated\n\
974 after the listing is made.)")
977 internal_with_output_to_temp_buffer ("*Process List*",
978 list_processes_1
, Qnil
);
982 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
983 "Return a list of all processes.")
986 return Fmapcar (Qcdr
, Vprocess_alist
);
989 /* Starting asynchronous inferior processes. */
991 static Lisp_Object
start_process_unwind ();
993 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
994 "Start a program in a subprocess. Return the process object for it.\n\
995 Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\
996 NAME is name for process. It is modified if necessary to make it unique.\n\
997 BUFFER is the buffer or (buffer-name) to associate with the process.\n\
998 Process output goes at end of that buffer, unless you specify\n\
999 an output stream or filter function to handle the output.\n\
1000 BUFFER may be also nil, meaning that this process is not associated\n\
1002 Third arg is program file name. It is searched for as in the shell.\n\
1003 Remaining arguments are strings to give program as arguments.")
1006 register Lisp_Object
*args
;
1008 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1010 register unsigned char *new_argv
;
1013 register unsigned char **new_argv
;
1016 int count
= specpdl_ptr
- specpdl
;
1020 buffer
= Fget_buffer_create (buffer
);
1022 /* Make sure that the child will be able to chdir to the current
1023 buffer's current directory, or its unhandled equivalent. We
1024 can't just have the child check for an error when it does the
1025 chdir, since it's in a vfork.
1027 We have to GCPRO around this because Fexpand_file_name and
1028 Funhandled_file_name_directory might call a file name handling
1029 function. The argument list is protected by the caller, so all
1030 we really have to worry about is buffer. */
1032 struct gcpro gcpro1
, gcpro2
;
1034 current_dir
= current_buffer
->directory
;
1036 GCPRO2 (buffer
, current_dir
);
1039 expand_and_dir_to_file
1040 (Funhandled_file_name_directory (current_dir
), Qnil
);
1041 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1042 report_file_error ("Setting current directory",
1043 Fcons (current_buffer
->directory
, Qnil
));
1049 CHECK_STRING (name
, 0);
1053 CHECK_STRING (program
, 2);
1056 /* Make a one member argv with all args concatenated
1057 together separated by a blank. */
1058 len
= XSTRING (program
)->size
+ 2;
1059 for (i
= 3; i
< nargs
; i
++)
1062 CHECK_STRING (tem
, i
);
1063 len
+= XSTRING (tem
)->size
+ 1; /* count the blank */
1065 new_argv
= (unsigned char *) alloca (len
);
1066 strcpy (new_argv
, XSTRING (program
)->data
);
1067 for (i
= 3; i
< nargs
; i
++)
1070 CHECK_STRING (tem
, i
);
1071 strcat (new_argv
, " ");
1072 strcat (new_argv
, XSTRING (tem
)->data
);
1074 /* Need to add code here to check for program existence on VMS */
1077 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1079 /* If program file name is not absolute, search our path for it */
1080 if (!IS_DIRECTORY_SEP (XSTRING (program
)->data
[0])
1081 && !(XSTRING (program
)->size
> 1
1082 && IS_DEVICE_SEP (XSTRING (program
)->data
[1])))
1084 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1087 GCPRO4 (name
, program
, buffer
, current_dir
);
1088 openp (Vexec_path
, program
, EXEC_SUFFIXES
, &tem
, 1);
1091 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1092 new_argv
[0] = XSTRING (tem
)->data
;
1095 new_argv
[0] = XSTRING (program
)->data
;
1097 for (i
= 3; i
< nargs
; i
++)
1100 CHECK_STRING (tem
, i
);
1101 new_argv
[i
- 2] = XSTRING (tem
)->data
;
1103 new_argv
[i
- 2] = 0;
1104 #endif /* not VMS */
1106 proc
= make_process (name
);
1107 /* If an error occurs and we can't start the process, we want to
1108 remove it from the process list. This means that each error
1109 check in create_process doesn't need to call remove_process
1110 itself; it's all taken care of here. */
1111 record_unwind_protect (start_process_unwind
, proc
);
1113 XPROCESS (proc
)->childp
= Qt
;
1114 XPROCESS (proc
)->command_channel_p
= Qnil
;
1115 XPROCESS (proc
)->buffer
= buffer
;
1116 XPROCESS (proc
)->sentinel
= Qnil
;
1117 XPROCESS (proc
)->filter
= Qnil
;
1118 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1120 create_process (proc
, new_argv
, current_dir
);
1122 return unbind_to (count
, proc
);
1125 /* This function is the unwind_protect form for Fstart_process. If
1126 PROC doesn't have its pid set, then we know someone has signalled
1127 an error and the process wasn't started successfully, so we should
1128 remove it from the process list. */
1130 start_process_unwind (proc
)
1133 if (!PROCESSP (proc
))
1136 /* Was PROC started successfully? */
1137 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1138 remove_process (proc
);
1145 create_process_1 (signo
)
1149 /* USG systems forget handlers when they are used;
1150 must reestablish each time */
1151 signal (signo
, create_process_1
);
1155 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1158 /* Mimic blocking of signals on system V, which doesn't really have it. */
1160 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1161 int sigchld_deferred
;
1164 create_process_sigchld ()
1166 signal (SIGCHLD
, create_process_sigchld
);
1168 sigchld_deferred
= 1;
1174 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1175 create_process (process
, new_argv
, current_dir
)
1176 Lisp_Object process
;
1178 Lisp_Object current_dir
;
1180 int pid
, inchannel
, outchannel
, forkin
, forkout
;
1183 SIGTYPE (*sigchld
)();
1186 extern char **environ
;
1188 inchannel
= outchannel
= -1;
1191 if (!NILP (Vprocess_connection_type
))
1192 outchannel
= inchannel
= allocate_pty ();
1197 /* On USG systems it does not work to open the pty's tty here
1198 and then close and reopen it in the child. */
1200 /* Don't let this terminal become our controlling terminal
1201 (in case we don't have one). */
1202 forkout
= forkin
= open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1204 forkout
= forkin
= open (pty_name
, O_RDWR
, 0);
1207 report_file_error ("Opening pty", Qnil
);
1209 forkin
= forkout
= -1;
1210 #endif /* not USG */
1214 #endif /* HAVE_PTYS */
1217 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1218 report_file_error ("Opening socketpair", Qnil
);
1219 outchannel
= inchannel
= sv
[0];
1220 forkout
= forkin
= sv
[1];
1222 #else /* not SKTPAIR */
1225 pipe_with_inherited_out (sv
);
1229 pipe_with_inherited_in (sv
);
1232 #else /* not WINDOWSNT */
1239 #endif /* not WINDOWSNT */
1241 #endif /* not SKTPAIR */
1244 /* Replaced by close_process_descs */
1245 set_exclusive_use (inchannel
);
1246 set_exclusive_use (outchannel
);
1249 /* Stride people say it's a mystery why this is needed
1250 as well as the O_NDELAY, but that it fails without this. */
1251 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1254 ioctl (inchannel
, FIONBIO
, &one
);
1259 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1262 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1266 /* Record this as an active process, with its channels.
1267 As a result, child_setup will close Emacs's side of the pipes. */
1268 chan_process
[inchannel
] = process
;
1269 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1270 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1271 /* Record the tty descriptor used in the subprocess. */
1273 XPROCESS (process
)->subtty
= Qnil
;
1275 XSETFASTINT (XPROCESS (process
)->subtty
, forkin
);
1276 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1277 XPROCESS (process
)->status
= Qrun
;
1279 /* Delay interrupts until we have a chance to store
1280 the new fork's pid in its process structure */
1284 #else /* not BSD4_1 */
1285 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1286 sigsetmask (sigmask (SIGCHLD
));
1287 #else /* ordinary USG */
1289 sigchld_deferred
= 0;
1290 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1292 #endif /* ordinary USG */
1293 #endif /* not BSD4_1 */
1294 #endif /* SIGCHLD */
1296 FD_SET (inchannel
, &input_wait_mask
);
1297 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1298 if (inchannel
> max_process_desc
)
1299 max_process_desc
= inchannel
;
1301 /* Until we store the proper pid, enable sigchld_handler
1302 to recognize an unknown pid as standing for this process.
1303 It is very important not to let this `marker' value stay
1304 in the table after this function has returned; if it does
1305 it might cause call-process to hang and subsequent asynchronous
1306 processes to get their return values scrambled. */
1307 XSETINT (XPROCESS (process
)->pid
, -1);
1310 /* child_setup must clobber environ on systems with true vfork.
1311 Protect it from permanent change. */
1312 char **save_environ
= environ
;
1317 #endif /* not WINDOWSNT */
1319 int xforkin
= forkin
;
1320 int xforkout
= forkout
;
1322 #if 0 /* This was probably a mistake--it duplicates code later on,
1323 but fails to handle all the cases. */
1324 /* Make sure SIGCHLD is not blocked in the child. */
1325 sigsetmask (SIGEMPTYMASK
);
1328 /* Make the pty be the controlling terminal of the process. */
1330 /* First, disconnect its current controlling terminal. */
1332 /* We tried doing setsid only if pty_flag, but it caused
1333 process_set_signal to fail on SGI when using a pipe. */
1335 /* Make the pty's terminal the controlling terminal. */
1339 /* We ignore the return value
1340 because faith@cs.unc.edu says that is necessary on Linux. */
1341 ioctl (xforkin
, TIOCSCTTY
, 0);
1344 #else /* not HAVE_SETSID */
1346 /* It's very important to call setpgrp here and no time
1347 afterwards. Otherwise, we lose our controlling tty which
1348 is set when we open the pty. */
1351 #endif /* not HAVE_SETSID */
1352 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1353 if (pty_flag
&& xforkin
>= 0)
1356 tcgetattr (xforkin
, &t
);
1358 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1359 write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1362 #if defined (NTTYDISC) && defined (TIOCSETD)
1363 if (pty_flag
&& xforkin
>= 0)
1365 /* Use new line discipline. */
1366 int ldisc
= NTTYDISC
;
1367 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1372 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1373 can do TIOCSPGRP only to the process's controlling tty. */
1376 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1377 I can't test it since I don't have 4.3. */
1378 int j
= open ("/dev/tty", O_RDWR
, 0);
1379 ioctl (j
, TIOCNOTTY
, 0);
1382 /* In order to get a controlling terminal on some versions
1383 of BSD, it is necessary to put the process in pgrp 0
1384 before it opens the terminal. */
1392 #endif /* TIOCNOTTY */
1394 #if !defined (RTU) && !defined (UNIPLUS)
1395 /*** There is a suggestion that this ought to be a
1396 conditional on TIOCSPGRP. */
1397 /* Now close the pty (if we had it open) and reopen it.
1398 This makes the pty the controlling terminal of the subprocess. */
1401 #ifdef SET_CHILD_PTY_PGRP
1402 int pgrp
= getpid ();
1405 /* I wonder if close (open (pty_name, ...)) would work? */
1408 xforkout
= xforkin
= open (pty_name
, O_RDWR
, 0);
1410 #ifdef SET_CHILD_PTY_PGRP
1411 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1412 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1418 #endif /* not UNIPLUS and not RTU */
1419 #ifdef SETUP_SLAVE_PTY
1424 #endif /* SETUP_SLAVE_PTY */
1426 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1427 Now reenable it in the child, so it will die when we want it to. */
1429 signal (SIGHUP
, SIG_DFL
);
1431 #endif /* HAVE_PTYS */
1436 #else /* not BSD4_1 */
1437 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1438 sigsetmask (SIGEMPTYMASK
);
1439 #else /* ordinary USG */
1441 signal (SIGCHLD
, sigchld
);
1443 #endif /* ordinary USG */
1444 #endif /* not BSD4_1 */
1445 #endif /* SIGCHLD */
1447 signal (SIGINT
, SIG_DFL
);
1448 signal (SIGQUIT
, SIG_DFL
);
1451 child_setup_tty (xforkout
);
1453 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1454 new_argv
, 1, current_dir
);
1455 #else /* not WINDOWSNT */
1456 child_setup (xforkin
, xforkout
, xforkout
,
1457 new_argv
, 1, current_dir
);
1458 #endif /* not WINDOWSNT */
1460 environ
= save_environ
;
1467 if (forkin
!= forkout
&& forkout
>= 0)
1469 report_file_error ("Doing vfork", Qnil
);
1472 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
1475 register_child (pid
, inchannel
);
1476 #endif /* WINDOWSNT */
1478 /* If the subfork execv fails, and it exits,
1479 this close hangs. I don't know why.
1480 So have an interrupt jar it loose. */
1482 signal (SIGALRM
, create_process_1
);
1484 XPROCESS (process
)->subtty
= Qnil
;
1489 if (forkin
!= forkout
&& forkout
>= 0)
1492 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1497 #else /* not BSD4_1 */
1498 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1499 sigsetmask (SIGEMPTYMASK
);
1500 #else /* ordinary USG */
1502 signal (SIGCHLD
, sigchld
);
1503 /* Now really handle any of these signals
1504 that came in during this function. */
1505 if (sigchld_deferred
)
1506 kill (getpid (), SIGCHLD
);
1508 #endif /* ordinary USG */
1509 #endif /* not BSD4_1 */
1510 #endif /* SIGCHLD */
1512 #endif /* not VMS */
1516 /* open a TCP network connection to a given HOST/SERVICE. Treated
1517 exactly like a normal process when reading and writing. Only
1518 differences are in status display and process deletion. A network
1519 connection has no PID; you cannot signal it. All you can do is
1520 deactivate and close it via delete-process */
1522 DEFUN ("open-network-stream", Fopen_network_stream
, Sopen_network_stream
,
1524 "Open a TCP connection for a service to a host.\n\
1525 Returns a subprocess-object to represent the connection.\n\
1526 Input and output work as for subprocesses; `delete-process' closes it.\n\
1527 Args are NAME BUFFER HOST SERVICE.\n\
1528 NAME is name for process. It is modified if necessary to make it unique.\n\
1529 BUFFER is the buffer (or buffer-name) to associate with the process.\n\
1530 Process output goes at end of that buffer, unless you specify\n\
1531 an output stream or filter function to handle the output.\n\
1532 BUFFER may be also nil, meaning that this process is not associated\n\
1534 Third arg is name of the host to connect to, or its IP address.\n\
1535 Fourth arg SERVICE is name of the service desired, or an integer\n\
1536 specifying a port number to connect to.")
1537 (name
, buffer
, host
, service
)
1538 Lisp_Object name
, buffer
, host
, service
;
1542 struct sockaddr_in address
;
1543 struct servent
*svc_info
;
1544 struct hostent
*host_info_ptr
, host_info
;
1545 char *(addr_list
[2]);
1546 IN_ADDR numeric_addr
;
1550 struct hostent host_info_fixed
;
1551 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1553 int count
= specpdl_ptr
- specpdl
;
1555 GCPRO4 (name
, buffer
, host
, service
);
1556 CHECK_STRING (name
, 0);
1557 CHECK_STRING (host
, 0);
1558 if (INTEGERP (service
))
1559 port
= htons ((unsigned short) XINT (service
));
1562 CHECK_STRING (service
, 0);
1563 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
1565 error ("Unknown service \"%s\"", XSTRING (service
)->data
);
1566 port
= svc_info
->s_port
;
1575 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
1577 if (! (host_info_ptr
== 0 && h_errno
== TRY_AGAIN
))
1580 Fsleep_for (make_number (1), Qnil
);
1582 if (host_info_ptr
== 0)
1583 /* Attempt to interpret host as numeric inet address */
1585 numeric_addr
= inet_addr ((char *) XSTRING (host
)->data
);
1586 if (NUMERIC_ADDR_ERROR
)
1587 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
1589 host_info_ptr
= &host_info
;
1590 host_info
.h_name
= 0;
1591 host_info
.h_aliases
= 0;
1592 host_info
.h_addrtype
= AF_INET
;
1594 /* Older machines have only one address slot called h_addr.
1595 Newer machines have h_addr_list, but #define h_addr to
1596 be its first element. */
1597 host_info
.h_addr_list
= &(addr_list
[0]);
1599 host_info
.h_addr
= (char*)(&numeric_addr
);
1601 host_info
.h_length
= strlen (addr_list
[0]);
1604 bzero (&address
, sizeof address
);
1605 bcopy (host_info_ptr
->h_addr
, (char *) &address
.sin_addr
,
1606 host_info_ptr
->h_length
);
1607 address
.sin_family
= host_info_ptr
->h_addrtype
;
1608 address
.sin_port
= port
;
1610 s
= socket (host_info_ptr
->h_addrtype
, SOCK_STREAM
, 0);
1612 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1614 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
1615 when connect is interrupted. So let's not let it get interrupted.
1616 Note we do not turn off polling, because polling is only used
1617 when not interrupt_input, and thus not normally used on the systems
1618 which have this bug. On systems which use polling, there's no way
1619 to quit if polling is turned off. */
1620 if (interrupt_input
)
1623 /* Slow down polling to every ten seconds.
1624 Some kernels have a bug which causes retrying connect to fail
1626 #ifdef POLL_FOR_INPUT
1627 bind_polling_period (10);
1631 if (connect (s
, (struct sockaddr
*) &address
, sizeof address
) == -1
1632 && errno
!= EISCONN
)
1638 if (errno
== EADDRINUSE
&& retry
< 20)
1646 if (interrupt_input
)
1650 report_file_error ("connection failed",
1651 Fcons (host
, Fcons (name
, Qnil
)));
1654 #ifdef POLL_FOR_INPUT
1655 unbind_to (count
, Qnil
);
1658 if (interrupt_input
)
1662 s
= connect_server (0);
1664 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1665 send_command (s
, C_PORT
, 0, "%s:%d", XSTRING (host
)->data
, ntohs (port
));
1666 send_command (s
, C_DUMB
, 1, 0);
1672 report_file_error ("error duplicating socket", Fcons (name
, Qnil
));
1675 buffer
= Fget_buffer_create (buffer
);
1676 proc
= make_process (name
);
1678 chan_process
[inch
] = proc
;
1681 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
1684 fcntl (inch
, F_SETFL
, O_NDELAY
);
1688 XPROCESS (proc
)->childp
= host
;
1689 XPROCESS (proc
)->command_channel_p
= Qnil
;
1690 XPROCESS (proc
)->buffer
= buffer
;
1691 XPROCESS (proc
)->sentinel
= Qnil
;
1692 XPROCESS (proc
)->filter
= Qnil
;
1693 XPROCESS (proc
)->command
= Qnil
;
1694 XPROCESS (proc
)->pid
= Qnil
;
1695 XSETINT (XPROCESS (proc
)->infd
, s
);
1696 XSETINT (XPROCESS (proc
)->outfd
, outch
);
1697 XPROCESS (proc
)->status
= Qrun
;
1698 FD_SET (inch
, &input_wait_mask
);
1699 FD_SET (inch
, &non_keyboard_wait_mask
);
1700 if (inch
> max_process_desc
)
1701 max_process_desc
= inch
;
1706 #endif /* HAVE_SOCKETS */
1708 deactivate_process (proc
)
1711 register int inchannel
, outchannel
;
1712 register struct Lisp_Process
*p
= XPROCESS (proc
);
1714 inchannel
= XINT (p
->infd
);
1715 outchannel
= XINT (p
->outfd
);
1719 /* Beware SIGCHLD hereabouts. */
1720 flush_pending_output (inchannel
);
1723 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
1724 sys$
dassgn (outchannel
);
1725 vs
= get_vms_process_pointer (p
->pid
);
1727 give_back_vms_process_stuff (vs
);
1731 if (outchannel
>= 0 && outchannel
!= inchannel
)
1735 XSETINT (p
->infd
, -1);
1736 XSETINT (p
->outfd
, -1);
1737 chan_process
[inchannel
] = Qnil
;
1738 FD_CLR (inchannel
, &input_wait_mask
);
1739 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
1740 if (inchannel
== max_process_desc
)
1743 /* We just closed the highest-numbered process input descriptor,
1744 so recompute the highest-numbered one now. */
1745 max_process_desc
= 0;
1746 for (i
= 0; i
< MAXDESC
; i
++)
1747 if (!NILP (chan_process
[i
]))
1748 max_process_desc
= i
;
1753 /* Close all descriptors currently in use for communication
1754 with subprocess. This is used in a newly-forked subprocess
1755 to get rid of irrelevant descriptors. */
1757 close_process_descs ()
1761 for (i
= 0; i
< MAXDESC
; i
++)
1763 Lisp_Object process
;
1764 process
= chan_process
[i
];
1765 if (!NILP (process
))
1767 int in
= XINT (XPROCESS (process
)->infd
);
1768 int out
= XINT (XPROCESS (process
)->outfd
);
1771 if (out
>= 0 && in
!= out
)
1778 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
1780 "Allow any pending output from subprocesses to be read by Emacs.\n\
1781 It is read into the process' buffers or given to their filter functions.\n\
1782 Non-nil arg PROCESS means do not return until some output has been received\n\
1784 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
1785 seconds and microseconds to wait; return after that much time whether\n\
1786 or not there is input.\n\
1787 Return non-nil iff we received any output before the timeout expired.")
1788 (proc
, timeout
, timeout_msecs
)
1789 register Lisp_Object proc
, timeout
, timeout_msecs
;
1794 if (! NILP (timeout_msecs
))
1796 CHECK_NUMBER (timeout_msecs
, 2);
1797 useconds
= XINT (timeout_msecs
);
1798 if (!INTEGERP (timeout
))
1799 XSETINT (timeout
, 0);
1802 int carry
= useconds
/ 1000000;
1804 XSETINT (timeout
, XINT (timeout
) + carry
);
1805 useconds
-= carry
* 1000000;
1807 /* I think this clause is necessary because C doesn't
1808 guarantee a particular rounding direction for negative
1812 XSETINT (timeout
, XINT (timeout
) - 1);
1813 useconds
+= 1000000;
1820 if (! NILP (timeout
))
1822 CHECK_NUMBER (timeout
, 1);
1823 seconds
= XINT (timeout
);
1836 XSETFASTINT (proc
, 0);
1839 (wait_reading_process_input (seconds
, useconds
, proc
, 0)
1843 /* This variable is different from waiting_for_input in keyboard.c.
1844 It is used to communicate to a lisp process-filter/sentinel (via the
1845 function Fwaiting_for_user_input_p below) whether emacs was waiting
1846 for user-input when that process-filter was called.
1847 waiting_for_input cannot be used as that is by definition 0 when
1848 lisp code is being evalled.
1849 This is also used in record_asynch_buffer_change.
1850 For that purpose, this must be 0
1851 when not inside wait_reading_process_input. */
1852 static int waiting_for_user_input_p
;
1854 /* Read and dispose of subprocess output while waiting for timeout to
1855 elapse and/or keyboard input to be available.
1858 timeout in seconds, or
1859 zero for no limit, or
1860 -1 means gobble data immediately available but don't wait for any.
1863 an additional duration to wait, measured in microseconds.
1864 If this is nonzero and time_limit is 0, then the timeout
1865 consists of MICROSECS only.
1867 READ_KBD is a lisp value:
1868 0 to ignore keyboard input, or
1869 1 to return when input is available, or
1870 -1 meaning caller will actually read the input, so don't throw to
1871 the quit handler, or
1872 a cons cell, meaning wait until its car is non-nil
1873 (and gobble terminal input into the buffer if any arrives), or
1874 a process object, meaning wait until something arrives from that
1875 process. The return value is true iff we read some input from
1878 DO_DISPLAY != 0 means redisplay should be done to show subprocess
1879 output that arrives.
1881 If READ_KBD is a pointer to a struct Lisp_Process, then the
1882 function returns true iff we received input from that process
1883 before the timeout elapsed.
1884 Otherwise, return true iff we received input from any process. */
1886 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
1887 int time_limit
, microsecs
;
1888 Lisp_Object read_kbd
;
1891 register int channel
, nfds
, m
;
1892 static SELECT_TYPE Available
;
1895 EMACS_TIME timeout
, end_time
, garbage
;
1897 int wait_channel
= -1;
1898 struct Lisp_Process
*wait_proc
= 0;
1899 int got_some_input
= 0;
1900 Lisp_Object
*wait_for_cell
= 0;
1902 FD_ZERO (&Available
);
1904 /* If read_kbd is a process to watch, set wait_proc and wait_channel
1906 if (PROCESSP (read_kbd
))
1908 wait_proc
= XPROCESS (read_kbd
);
1909 wait_channel
= XINT (wait_proc
->infd
);
1910 XSETFASTINT (read_kbd
, 0);
1913 /* If waiting for non-nil in a cell, record where. */
1914 if (CONSP (read_kbd
))
1916 wait_for_cell
= &XCONS (read_kbd
)->car
;
1917 XSETFASTINT (read_kbd
, 0);
1920 waiting_for_user_input_p
= XINT (read_kbd
);
1922 /* Since we may need to wait several times,
1923 compute the absolute time to return at. */
1924 if (time_limit
|| microsecs
)
1926 EMACS_GET_TIME (end_time
);
1927 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
1928 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
1931 /* It would not be safe to call this below,
1932 where we call redisplay_preserve_echo_area. */
1933 if (do_display
&& frame_garbaged
)
1934 prepare_menu_bars ();
1938 /* If calling from keyboard input, do not quit
1939 since we want to return C-g as an input character.
1940 Otherwise, do pending quit if requested. */
1941 if (XINT (read_kbd
) >= 0)
1944 /* Exit now if the cell we're waiting for became non-nil. */
1945 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
1948 /* Compute time from now till when time limit is up */
1949 /* Exit if already run out */
1950 if (time_limit
== -1)
1952 /* -1 specified for timeout means
1953 gobble output available now
1954 but don't wait at all. */
1956 EMACS_SET_SECS_USECS (timeout
, 0, 0);
1958 else if (time_limit
|| microsecs
)
1960 EMACS_GET_TIME (timeout
);
1961 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
1962 if (EMACS_TIME_NEG_P (timeout
))
1967 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
1970 /* Cause C-g and alarm signals to take immediate action,
1971 and cause input available signals to zero out timeout.
1973 It is important that we do this before checking for process
1974 activity. If we get a SIGCHLD after the explicit checks for
1975 process activity, timeout is the only way we will know. */
1976 if (XINT (read_kbd
) < 0)
1977 set_waiting_for_input (&timeout
);
1979 /* If status of something has changed, and no input is
1980 available, notify the user of the change right away. After
1981 this explicit check, we'll let the SIGCHLD handler zap
1982 timeout to get our attention. */
1983 if (update_tick
!= process_tick
&& do_display
)
1985 Atemp
= input_wait_mask
;
1986 EMACS_SET_SECS_USECS (timeout
, 0, 0);
1987 if (select (MAXDESC
, &Atemp
, 0, 0, &timeout
) <= 0)
1989 /* It's okay for us to do this and then continue with
1990 the loop, since timeout has already been zeroed out. */
1991 clear_waiting_for_input ();
1996 /* Don't wait for output from a non-running process. */
1997 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
1998 update_status (wait_proc
);
2000 && ! EQ (wait_proc
->status
, Qrun
))
2002 clear_waiting_for_input ();
2006 /* Wait till there is something to do */
2008 if (! XINT (read_kbd
) && wait_for_cell
== 0)
2009 Available
= non_keyboard_wait_mask
;
2011 Available
= input_wait_mask
;
2013 /* If frame size has changed or the window is newly mapped,
2014 redisplay now, before we start to wait. There is a race
2015 condition here; if a SIGIO arrives between now and the select
2016 and indicates that a frame is trashed, the select may block
2017 displaying a trashed screen. */
2018 if (frame_garbaged
&& do_display
)
2019 redisplay_preserve_echo_area ();
2021 if (XINT (read_kbd
) && detect_input_pending ())
2024 FD_ZERO (&Available
);
2027 nfds
= select (MAXDESC
, &Available
, 0, 0, &timeout
);
2031 /* Make C-g and alarm signals set flags again */
2032 clear_waiting_for_input ();
2034 /* If we woke up due to SIGWINCH, actually change size now. */
2035 do_pending_window_change ();
2037 if (time_limit
&& nfds
== 0) /* timeout elapsed */
2041 if (xerrno
== EINTR
)
2042 FD_ZERO (&Available
);
2044 /* Ultrix select seems to return ENOMEM when it is
2045 interrupted. Treat it just like EINTR. Bleah. Note
2046 that we want to test for the "ultrix" CPP symbol, not
2047 "__ultrix__"; the latter is only defined under GCC, but
2048 not by DEC's bundled CC. -JimB */
2049 else if (xerrno
== ENOMEM
)
2050 FD_ZERO (&Available
);
2053 /* This happens for no known reason on ALLIANT.
2054 I am guessing that this is the right response. -- RMS. */
2055 else if (xerrno
== EFAULT
)
2056 FD_ZERO (&Available
);
2058 else if (xerrno
== EBADF
)
2061 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
2062 the child's closure of the pts gives the parent a SIGHUP, and
2063 the ptc file descriptor is automatically closed,
2064 yielding EBADF here or at select() call above.
2065 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
2066 in m/ibmrt-aix.h), and here we just ignore the select error.
2067 Cleanup occurs c/o status_notify after SIGCLD. */
2068 FD_ZERO (&Available
); /* Cannot depend on values returned */
2074 error("select error: %s", strerror (xerrno
));
2076 #if defined(sun) && !defined(USG5_4)
2077 else if (nfds
> 0 && keyboard_bit_set (&Available
)
2079 /* System sometimes fails to deliver SIGIO.
2081 David J. Mackenzie says that Emacs doesn't compile under
2082 Solaris if this code is enabled, thus the USG5_4 in the CPP
2083 conditional. "I haven't noticed any ill effects so far.
2084 If you find a Solaris expert somewhere, they might know
2086 kill (getpid (), SIGIO
);
2089 /* Check for keyboard input */
2090 /* If there is any, return immediately
2091 to give it higher priority than subprocesses */
2093 /* We used to do this if wait_for_cell,
2094 but that caused infinite recursion in selection request events. */
2095 if ((XINT (read_kbd
) || wait_for_cell
)
2096 && detect_input_pending ())
2099 if (detect_input_pending ())
2103 /* Exit now if the cell we're waiting for became non-nil. */
2104 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2108 /* If we think we have keyboard input waiting, but didn't get SIGIO
2109 go read it. This can happen with X on BSD after logging out.
2110 In that case, there really is no input and no SIGIO,
2111 but select says there is input. */
2113 if (XINT (read_kbd
) && interrupt_input
2114 && (keyboard_bit_set (&Available
)))
2119 got_some_input
|= nfds
> 0;
2121 /* If checking input just got us a size-change event from X,
2122 obey it now if we should. */
2123 if (XINT (read_kbd
) || wait_for_cell
)
2124 do_pending_window_change ();
2126 /* Check for data from a process. */
2127 /* Really FIRST_PROC_DESC should be 0 on Unix,
2128 but this is safer in the short run. */
2129 for (channel
= 0; channel
<= max_process_desc
; channel
++)
2131 if (FD_ISSET (channel
, &Available
)
2132 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
2136 /* If waiting for this channel, arrange to return as
2137 soon as no more input to be processed. No more
2139 if (wait_channel
== channel
)
2145 proc
= chan_process
[channel
];
2149 /* Read data from the process, starting with our
2150 buffered-ahead character if we have one. */
2152 nread
= read_process_output (proc
, channel
);
2155 /* Since read_process_output can run a filter,
2156 which can call accept-process-output,
2157 don't try to read from any other processes
2158 before doing the select again. */
2159 FD_ZERO (&Available
);
2162 redisplay_preserve_echo_area ();
2165 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2169 else if (nread
== -1 && errno
== EAGAIN
)
2173 else if (nread
== -1 && errno
== EAGAIN
)
2175 /* Note that we cannot distinguish between no input
2176 available now and a closed pipe.
2177 With luck, a closed pipe will be accompanied by
2178 subprocess termination and SIGCHLD. */
2179 else if (nread
== 0 && !NETCONN_P (proc
))
2181 #endif /* O_NDELAY */
2182 #endif /* O_NONBLOCK */
2183 #endif /* EWOULDBLOCK */
2185 /* On some OSs with ptys, when the process on one end of
2186 a pty exits, the other end gets an error reading with
2187 errno = EIO instead of getting an EOF (0 bytes read).
2188 Therefore, if we get an error reading and errno =
2189 EIO, just continue, because the child process has
2190 exited and should clean itself up soon (e.g. when we
2192 else if (nread
== -1 && errno
== EIO
)
2194 #endif /* HAVE_PTYS */
2195 /* If we can detect process termination, don't consider the process
2196 gone just because its pipe is closed. */
2198 else if (nread
== 0 && !NETCONN_P (proc
))
2203 /* Preserve status of processes already terminated. */
2204 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2205 deactivate_process (proc
);
2206 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2207 update_status (XPROCESS (proc
));
2208 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2209 XPROCESS (proc
)->status
2210 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2213 } /* end for each file descriptor */
2214 } /* end while exit conditions not met */
2216 waiting_for_user_input_p
= 0;
2218 /* If calling from keyboard input, do not quit
2219 since we want to return C-g as an input character.
2220 Otherwise, do pending quit if requested. */
2221 if (XINT (read_kbd
) >= 0)
2223 /* Prevent input_pending from remaining set if we quit. */
2224 clear_input_pending ();
2228 return got_some_input
;
2231 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
2234 read_process_output_call (fun_and_args
)
2235 Lisp_Object fun_and_args
;
2237 return apply1 (XCONS (fun_and_args
)->car
, XCONS (fun_and_args
)->cdr
);
2241 read_process_output_error_handler (error
)
2244 cmd_error_internal (error
, "error in process filter: ");
2246 update_echo_area ();
2247 Fsleep_for (make_number (2));
2250 /* Read pending output from the process channel,
2251 starting with our buffered-ahead character if we have one.
2252 Yield number of characters read.
2254 This function reads at most 1024 characters.
2255 If you want to read all available subprocess output,
2256 you must call it repeatedly until it returns zero. */
2258 read_process_output (proc
, channel
)
2260 register int channel
;
2262 register int nchars
;
2268 register Lisp_Object outstream
;
2269 register struct buffer
*old
= current_buffer
;
2270 register struct Lisp_Process
*p
= XPROCESS (proc
);
2271 register int opoint
;
2274 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2276 vs
= get_vms_process_pointer (p
->pid
);
2280 return(0); /* Really weird if it does this */
2281 if (!(vs
->iosb
[0] & 1))
2282 return -1; /* I/O error */
2285 error ("Could not get VMS process pointer");
2286 chars
= vs
->inputBuffer
;
2287 nchars
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2290 start_vms_process_read (vs
); /* Crank up the next read on the process */
2291 return 1; /* Nothing worth printing, say we got 1 */
2295 if (proc_buffered_char
[channel
] < 0)
2297 nchars
= read_child_output (channel
, chars
, sizeof (chars
));
2299 nchars
= read (channel
, chars
, sizeof chars
);
2303 chars
[0] = proc_buffered_char
[channel
];
2304 proc_buffered_char
[channel
] = -1;
2306 nchars
= read_child_output (channel
, chars
+ 1, sizeof (chars
) - 1);
2308 nchars
= read (channel
, chars
+ 1, sizeof chars
- 1);
2313 nchars
= nchars
+ 1;
2315 #endif /* not VMS */
2317 if (nchars
<= 0) return nchars
;
2319 outstream
= p
->filter
;
2320 if (!NILP (outstream
))
2322 /* We inhibit quit here instead of just catching it so that
2323 hitting ^G when a filter happens to be running won't screw
2325 int count
= specpdl_ptr
- specpdl
;
2326 Lisp_Object odeactivate
;
2327 Lisp_Object obuffer
;
2329 odeactivate
= Vdeactivate_mark
;
2330 obuffer
= Fcurrent_buffer ();
2332 specbind (Qinhibit_quit
, Qt
);
2333 specbind (Qlast_nonmenu_event
, Qt
);
2335 running_asynch_code
= 1;
2336 internal_condition_case_1 (read_process_output_call
,
2339 Fcons (make_string (chars
,
2342 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
2343 read_process_output_error_handler
);
2344 running_asynch_code
= 0;
2345 restore_match_data ();
2347 /* Handling the process output should not deactivate the mark. */
2348 Vdeactivate_mark
= odeactivate
;
2350 if (! EQ (Fcurrent_buffer (), obuffer
))
2351 record_asynch_buffer_change ();
2353 if (waiting_for_user_input_p
)
2354 prepare_menu_bars ();
2357 start_vms_process_read (vs
);
2359 unbind_to (count
, Qnil
);
2363 /* If no filter, write into buffer if it isn't dead. */
2364 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2366 Lisp_Object old_read_only
;
2367 Lisp_Object old_begv
, old_zv
;
2368 Lisp_Object odeactivate
;
2370 odeactivate
= Vdeactivate_mark
;
2372 Fset_buffer (p
->buffer
);
2374 old_read_only
= current_buffer
->read_only
;
2375 XSETFASTINT (old_begv
, BEGV
);
2376 XSETFASTINT (old_zv
, ZV
);
2378 current_buffer
->read_only
= Qnil
;
2380 /* Insert new output into buffer
2381 at the current end-of-output marker,
2382 thus preserving logical ordering of input and output. */
2383 if (XMARKER (p
->mark
)->buffer
)
2384 SET_PT (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
));
2388 /* If the output marker is outside of the visible region, save
2389 the restriction and widen. */
2390 if (! (BEGV
<= point
&& point
<= ZV
))
2393 /* Make sure opoint floats ahead of any new text, just as point
2395 if (point
<= opoint
)
2398 /* Insert after old_begv, but before old_zv. */
2399 if (point
< XFASTINT (old_begv
))
2400 XSETFASTINT (old_begv
, XFASTINT (old_begv
) + nchars
);
2401 if (point
<= XFASTINT (old_zv
))
2402 XSETFASTINT (old_zv
, XFASTINT (old_zv
) + nchars
);
2404 /* Insert before markers in case we are inserting where
2405 the buffer's mark is, and the user's next command is Meta-y. */
2406 insert_before_markers (chars
, nchars
);
2407 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
2409 update_mode_lines
++;
2411 /* If the restriction isn't what it should be, set it. */
2412 if (XFASTINT (old_begv
) != BEGV
|| XFASTINT (old_zv
) != ZV
)
2413 Fnarrow_to_region (old_begv
, old_zv
);
2415 /* Handling the process output should not deactivate the mark. */
2416 Vdeactivate_mark
= odeactivate
;
2418 current_buffer
->read_only
= old_read_only
;
2420 set_buffer_internal (old
);
2423 start_vms_process_read (vs
);
2428 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
2430 "Returns non-nil if emacs is waiting for input from the user.\n\
2431 This is intended for use by asynchronous process output filters and sentinels.")
2434 return (waiting_for_user_input_p
? Qt
: Qnil
);
2437 /* Sending data to subprocess */
2439 jmp_buf send_process_frame
;
2442 send_process_trap ()
2448 longjmp (send_process_frame
, 1);
2451 /* Send some data to process PROC.
2452 BUF is the beginning of the data; LEN is the number of characters.
2453 OBJECT is the Lisp object that the data comes from. */
2455 send_process (proc
, buf
, len
, object
)
2461 /* Don't use register vars; longjmp can lose them. */
2463 unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
2466 struct Lisp_Process
*p
= XPROCESS (proc
);
2467 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2470 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2471 update_status (XPROCESS (proc
));
2472 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2473 error ("Process %s not running", procname
);
2476 vs
= get_vms_process_pointer (p
->pid
);
2478 error ("Could not find this process: %x", p
->pid
);
2479 else if (write_to_vms_process (vs
, buf
, len
))
2483 if (pty_max_bytes
== 0)
2485 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
2486 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
2488 if (pty_max_bytes
< 0)
2489 pty_max_bytes
= 250;
2491 pty_max_bytes
= 250;
2493 /* Deduct one, to leave space for the eof. */
2497 if (!setjmp (send_process_frame
))
2501 SIGTYPE (*old_sigpipe
)();
2504 /* Decide how much data we can send in one batch.
2505 Long lines need to be split into multiple batches. */
2506 if (!NILP (XPROCESS (proc
)->pty_flag
))
2508 /* Starting this at zero is always correct when not the first iteration
2509 because the previous iteration ended by sending C-d.
2510 It may not be correct for the first iteration
2511 if a partial line was sent in a separate send_process call.
2512 If that proves worth handling, we need to save linepos
2513 in the process object. */
2516 char *end
= buf
+ len
;
2518 /* Scan through this text for a line that is too long. */
2519 while (ptr
!= end
&& linepos
< pty_max_bytes
)
2527 /* If we found one, break the line there
2528 and put in a C-d to force the buffer through. */
2532 /* Send this batch, using one or more write calls. */
2535 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
2536 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
2537 signal (SIGPIPE
, old_sigpipe
);
2543 || errno
== EWOULDBLOCK
2549 /* Buffer is full. Wait, accepting input;
2550 that may allow the program
2551 to finish doing output and read more. */
2556 /* Running filters might relocate buffers or strings.
2557 Arrange to relocate BUF. */
2558 if (BUFFERP (object
))
2559 offset
= BUF_PTR_CHAR_POS (XBUFFER (object
),
2560 (unsigned char *) buf
);
2561 else if (STRINGP (object
))
2562 offset
= buf
- (char *) XSTRING (object
)->data
;
2564 XSETFASTINT (zero
, 0);
2565 wait_reading_process_input (1, 0, zero
, 0);
2567 if (BUFFERP (object
))
2568 buf
= (char *) BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
2569 else if (STRINGP (object
))
2570 buf
= offset
+ (char *) XSTRING (object
)->data
;
2575 /* This is a real error. */
2576 report_file_error ("writing to process", Fcons (proc
, Qnil
));
2583 /* If we sent just part of the string, put in an EOF
2584 to force it through, before we send the rest. */
2586 Fprocess_send_eof (proc
);
2591 XPROCESS (proc
)->raw_status_low
= Qnil
;
2592 XPROCESS (proc
)->raw_status_high
= Qnil
;
2593 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2594 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2595 deactivate_process (proc
);
2597 error ("Error writing to process %s; closed it", procname
);
2599 error ("SIGPIPE raised on process %s; closed it", procname
);
2604 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
2606 "Send current contents of region as input to PROCESS.\n\
2607 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2608 nil, indicating the current buffer's process.\n\
2609 Called from program, takes three arguments, PROCESS, START and END.\n\
2610 If the region is more than 500 characters long,\n\
2611 it is sent in several bunches. This may happen even for shorter regions.\n\
2612 Output from processes can arrive in between bunches.")
2613 (process
, start
, end
)
2614 Lisp_Object process
, start
, end
;
2619 proc
= get_process (process
);
2620 validate_region (&start
, &end
);
2622 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
2625 start1
= XINT (start
);
2626 send_process (proc
, &FETCH_CHAR (start1
), XINT (end
) - XINT (start
),
2627 Fcurrent_buffer ());
2632 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
2634 "Send PROCESS the contents of STRING as input.\n\
2635 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2636 nil, indicating the current buffer's process.\n\
2637 If STRING is more than 500 characters long,\n\
2638 it is sent in several bunches. This may happen even for shorter strings.\n\
2639 Output from processes can arrive in between bunches.")
2641 Lisp_Object process
, string
;
2644 CHECK_STRING (string
, 1);
2645 proc
= get_process (process
);
2646 send_process (proc
, XSTRING (string
)->data
, XSTRING (string
)->size
, string
);
2650 /* send a signal number SIGNO to PROCESS.
2651 CURRENT_GROUP means send to the process group that currently owns
2652 the terminal being used to communicate with PROCESS.
2653 This is used for various commands in shell mode.
2654 If NOMSG is zero, insert signal-announcements into process's buffers
2657 If we can, we try to signal PROCESS by sending control characters
2658 down the pty. This allows us to signal inferiors who have changed
2659 their uid, for which killpg would return an EPERM error. */
2662 process_send_signal (process
, signo
, current_group
, nomsg
)
2663 Lisp_Object process
;
2665 Lisp_Object current_group
;
2669 register struct Lisp_Process
*p
;
2673 proc
= get_process (process
);
2674 p
= XPROCESS (proc
);
2676 if (!EQ (p
->childp
, Qt
))
2677 error ("Process %s is not a subprocess",
2678 XSTRING (p
->name
)->data
);
2679 if (XINT (p
->infd
) < 0)
2680 error ("Process %s is not active",
2681 XSTRING (p
->name
)->data
);
2683 if (NILP (p
->pty_flag
))
2684 current_group
= Qnil
;
2686 /* If we are using pgrps, get a pgrp number and make it negative. */
2687 if (!NILP (current_group
))
2689 #ifdef SIGNALS_VIA_CHARACTERS
2690 /* If possible, send signals to the entire pgrp
2691 by sending an input character to it. */
2693 /* TERMIOS is the latest and bestest, and seems most likely to
2694 work. If the system has it, use it. */
2701 tcgetattr (XINT (p
->infd
), &t
);
2702 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2706 tcgetattr (XINT (p
->infd
), &t
);
2707 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2711 tcgetattr (XINT (p
->infd
), &t
);
2712 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
2713 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2715 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
2720 #else /* ! HAVE_TERMIOS */
2722 /* On Berkeley descendants, the following IOCTL's retrieve the
2723 current control characters. */
2724 #if defined (TIOCGLTC) && defined (TIOCGETC)
2732 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2733 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
2736 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2737 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
2741 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
2742 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
2744 #endif /* ! defined (SIGTSTP) */
2747 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2749 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
2756 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2757 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2760 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2761 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2765 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2766 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2768 #endif /* ! defined (SIGTSTP) */
2770 #else /* ! defined (TCGETA) */
2771 Your configuration files are messed up
.
2772 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
2773 you'd better be using one of the alternatives above! */
2774 #endif /* ! defined (TCGETA) */
2775 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2776 #endif /* ! defined HAVE_TERMIOS */
2777 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
2780 /* Get the pgrp using the tty itself, if we have that.
2781 Otherwise, use the pty to get the pgrp.
2782 On pfa systems, saka@pfu.fujitsu.co.JP writes:
2783 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
2784 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
2785 His patch indicates that if TIOCGPGRP returns an error, then
2786 we should just assume that p->pid is also the process group id. */
2790 if (!NILP (p
->subtty
))
2791 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
2793 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
2797 gid
= - XFASTINT (p
->pid
);
2798 #endif /* ! defined (pfa) */
2804 #else /* ! defined (TIOCGPGRP ) */
2805 /* Can't select pgrps on this system, so we know that
2806 the child itself heads the pgrp. */
2807 gid
= - XFASTINT (p
->pid
);
2808 #endif /* ! defined (TIOCGPGRP ) */
2811 gid
= - XFASTINT (p
->pid
);
2817 p
->raw_status_low
= Qnil
;
2818 p
->raw_status_high
= Qnil
;
2820 XSETINT (p
->tick
, ++process_tick
);
2824 #endif /* ! defined (SIGCONT) */
2827 send_process (proc
, "\003", 1, Qnil
); /* ^C */
2832 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
2837 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
2840 flush_pending_output (XINT (p
->infd
));
2844 /* If we don't have process groups, send the signal to the immediate
2845 subprocess. That isn't really right, but it's better than any
2846 obvious alternative. */
2849 kill (XFASTINT (p
->pid
), signo
);
2853 /* gid may be a pid, or minus a pgrp's number */
2855 if (!NILP (current_group
))
2856 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
2859 gid
= - XFASTINT (p
->pid
);
2862 #else /* ! defined (TIOCSIGSEND) */
2863 EMACS_KILLPG (-gid
, signo
);
2864 #endif /* ! defined (TIOCSIGSEND) */
2867 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
2868 "Interrupt process PROCESS. May be process or name of one.\n\
2869 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
2870 nil or no arg means current buffer's process.\n\
2871 Second arg CURRENT-GROUP non-nil means send signal to\n\
2872 the current process-group of the process's controlling terminal\n\
2873 rather than to the process's own process group.\n\
2874 If the process is a shell, this means interrupt current subjob\n\
2875 rather than the shell.")
2876 (process
, current_group
)
2877 Lisp_Object process
, current_group
;
2879 process_send_signal (process
, SIGINT
, current_group
, 0);
2883 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
2884 "Kill process PROCESS. May be process or name of one.\n\
2885 See function `interrupt-process' for more details on usage.")
2886 (process
, current_group
)
2887 Lisp_Object process
, current_group
;
2889 process_send_signal (process
, SIGKILL
, current_group
, 0);
2893 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
2894 "Send QUIT signal to process PROCESS. May be process or name of one.\n\
2895 See function `interrupt-process' for more details on usage.")
2896 (process
, current_group
)
2897 Lisp_Object process
, current_group
;
2899 process_send_signal (process
, SIGQUIT
, current_group
, 0);
2903 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
2904 "Stop process PROCESS. May be process or name of one.\n\
2905 See function `interrupt-process' for more details on usage.")
2906 (process
, current_group
)
2907 Lisp_Object process
, current_group
;
2910 error ("no SIGTSTP support");
2912 process_send_signal (process
, SIGTSTP
, current_group
, 0);
2917 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
2918 "Continue process PROCESS. May be process or name of one.\n\
2919 See function `interrupt-process' for more details on usage.")
2920 (process
, current_group
)
2921 Lisp_Object process
, current_group
;
2924 process_send_signal (process
, SIGCONT
, current_group
, 0);
2926 error ("no SIGCONT support");
2931 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
2932 2, 2, "nProcess number: \nnSignal code: ",
2933 "Send the process with number PID the signal with code CODE.\n\
2934 Both PID and CODE are integers.")
2936 Lisp_Object pid
, sig
;
2938 CHECK_NUMBER (pid
, 0);
2939 CHECK_NUMBER (sig
, 1);
2941 /* Only works for kill-type signals */
2942 return make_number (win32_kill_process (XINT (pid
), XINT (sig
)));
2944 return make_number (kill (XINT (pid
), XINT (sig
)));
2948 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
2949 "Make PROCESS see end-of-file in its input.\n\
2950 Eof comes after any text already sent to it.\n\
2951 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2952 nil, indicating the current buffer's process.\n\
2953 If PROCESS is a network connection, or is a process communicating\n\
2954 through a pipe (as opposed to a pty), then you cannot send any more\n\
2955 text to PROCESS after you call this function.")
2957 Lisp_Object process
;
2961 proc
= get_process (process
);
2963 /* Make sure the process is really alive. */
2964 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2965 update_status (XPROCESS (proc
));
2966 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2967 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
2970 send_process (proc
, "\032", 1, Qnil
); /* ^z */
2972 if (!NILP (XPROCESS (proc
)->pty_flag
))
2973 send_process (proc
, "\004", 1, Qnil
);
2976 close (XINT (XPROCESS (proc
)->outfd
));
2977 XSETINT (XPROCESS (proc
)->outfd
, open (NULL_DEVICE
, O_WRONLY
));
2983 /* Kill all processes associated with `buffer'.
2984 If `buffer' is nil, kill all processes */
2986 kill_buffer_processes (buffer
)
2989 Lisp_Object tail
, proc
;
2991 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCONS (tail
)->cdr
)
2993 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
2994 if (GC_PROCESSP (proc
)
2995 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
2997 if (NETCONN_P (proc
))
2998 Fdelete_process (proc
);
2999 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
3000 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
3005 /* On receipt of a signal that a child status has changed,
3006 loop asking about children with changed statuses until
3007 the system says there are no more.
3008 All we do is change the status;
3009 we do not run sentinels or print notifications.
3010 That is saved for the next time keyboard input is done,
3011 in order to avoid timing errors. */
3013 /** WARNING: this can be called during garbage collection.
3014 Therefore, it must not be fooled by the presence of mark bits in
3017 /** USG WARNING: Although it is not obvious from the documentation
3018 in signal(2), on a USG system the SIGCLD handler MUST NOT call
3019 signal() before executing at least one wait(), otherwise the handler
3020 will be called again, resulting in an infinite loop. The relevant
3021 portion of the documentation reads "SIGCLD signals will be queued
3022 and the signal-catching function will be continually reentered until
3023 the queue is empty". Invoking signal() causes the kernel to reexamine
3024 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
3027 sigchld_handler (signo
)
3030 int old_errno
= errno
;
3032 register struct Lisp_Process
*p
;
3033 extern EMACS_TIME
*input_available_clear_time
;
3037 sigheld
|= sigbit (SIGCHLD
);
3049 #endif /* no WUNTRACED */
3050 /* Keep trying to get a status until we get a definitive result. */
3054 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
3056 while (pid
<= 0 && errno
== EINTR
);
3060 /* A real failure. We have done all our job, so return. */
3062 /* USG systems forget handlers when they are used;
3063 must reestablish each time */
3065 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
3068 sigheld
&= ~sigbit (SIGCHLD
);
3076 #endif /* no WNOHANG */
3078 /* Find the process that signaled us, and record its status. */
3081 for (tail
= Vprocess_alist
; XSYMBOL (tail
) != XSYMBOL (Qnil
); tail
= XCONS (tail
)->cdr
)
3083 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3084 p
= XPROCESS (proc
);
3085 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
3090 /* Look for an asynchronous process whose pid hasn't been filled
3093 for (tail
= Vprocess_alist
; XSYMBOL (tail
) != XSYMBOL (Qnil
); tail
= XCONS (tail
)->cdr
)
3095 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3096 p
= XPROCESS (proc
);
3097 if (INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
3102 /* Change the status of the process that was found. */
3105 union { int i
; WAITTYPE wt
; } u
;
3106 int clear_desc_flag
= 0;
3108 XSETINT (p
->tick
, ++process_tick
);
3110 XSETFASTINT (p
->raw_status_low
, u
.i
& 0xffff);
3111 XSETFASTINT (p
->raw_status_high
, u
.i
>> 16);
3113 /* If process has terminated, stop waiting for its output. */
3114 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
3115 && XINT (p
->infd
) >= 0)
3116 clear_desc_flag
= 1;
3118 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
3119 if (clear_desc_flag
)
3121 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
3122 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
3125 /* Tell wait_reading_process_input that it needs to wake up and
3127 if (input_available_clear_time
)
3128 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3131 /* There was no asynchronous process found for that id. Check
3132 if we have a synchronous process. */
3135 synch_process_alive
= 0;
3137 /* Report the status of the synchronous process. */
3139 synch_process_retcode
= WRETCODE (w
);
3140 else if (WIFSIGNALED (w
))
3142 int code
= WTERMSIG (w
);
3148 /* Suppress warning if the table has const char *. */
3149 signame
= (char *) sys_siglist
[code
];
3151 signame
= sys_errlist
[code
];
3155 signame
= "unknown";
3157 synch_process_death
= signame
;
3160 /* Tell wait_reading_process_input that it needs to wake up and
3162 if (input_available_clear_time
)
3163 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3166 /* On some systems, we must return right away.
3167 If any more processes want to signal us, we will
3169 Otherwise (on systems that have WNOHANG), loop around
3170 to use up all the processes that have something to tell us. */
3171 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT)
3173 signal (signo
, sigchld_handler
);
3177 #endif /* USG, but not HPUX with WNOHANG */
3183 exec_sentinel_unwind (data
)
3186 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
3191 exec_sentinel_error_handler (error
)
3194 cmd_error_internal (error
, "error in process sentinel: ");
3196 update_echo_area ();
3197 Fsleep_for (make_number (2));
3201 exec_sentinel (proc
, reason
)
3202 Lisp_Object proc
, reason
;
3204 Lisp_Object sentinel
, obuffer
, odeactivate
;
3205 register struct Lisp_Process
*p
= XPROCESS (proc
);
3206 int count
= specpdl_ptr
- specpdl
;
3208 odeactivate
= Vdeactivate_mark
;
3209 obuffer
= Fcurrent_buffer ();
3210 sentinel
= p
->sentinel
;
3211 if (NILP (sentinel
))
3214 /* Zilch the sentinel while it's running, to avoid recursive invocations;
3215 assure that it gets restored no matter how the sentinel exits. */
3217 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
3218 /* Inhibit quit so that random quits don't screw up a running filter. */
3219 specbind (Qinhibit_quit
, Qt
);
3220 specbind (Qlast_nonmenu_event
, Qt
);
3222 running_asynch_code
= 1;
3223 internal_condition_case_1 (read_process_output_call
,
3225 Fcons (proc
, Fcons (reason
, Qnil
))),
3226 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
3227 exec_sentinel_error_handler
);
3228 running_asynch_code
= 0;
3229 restore_match_data ();
3231 Vdeactivate_mark
= odeactivate
;
3232 if (! EQ (Fcurrent_buffer (), obuffer
))
3233 record_asynch_buffer_change ();
3235 if (waiting_for_user_input_p
)
3236 prepare_menu_bars ();
3237 unbind_to (count
, Qnil
);
3240 /* Report all recent events of a change in process status
3241 (either run the sentinel or output a message).
3242 This is done while Emacs is waiting for keyboard input. */
3246 register Lisp_Object proc
, buffer
;
3247 Lisp_Object tail
, msg
;
3248 struct gcpro gcpro1
, gcpro2
;
3252 /* We need to gcpro tail; if read_process_output calls a filter
3253 which deletes a process and removes the cons to which tail points
3254 from Vprocess_alist, and then causes a GC, tail is an unprotected
3258 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
3261 register struct Lisp_Process
*p
;
3263 proc
= Fcdr (Fcar (tail
));
3264 p
= XPROCESS (proc
);
3266 if (XINT (p
->tick
) != XINT (p
->update_tick
))
3268 XSETINT (p
->update_tick
, XINT (p
->tick
));
3270 /* If process is still active, read any output that remains. */
3271 if (XINT (p
->infd
) >= 0)
3272 while (! EQ (p
->filter
, Qt
)
3273 && read_process_output (proc
, XINT (p
->infd
)) > 0);
3277 /* Get the text to use for the message. */
3278 if (!NILP (p
->raw_status_low
))
3280 msg
= status_message (p
->status
);
3282 /* If process is terminated, deactivate it or delete it. */
3284 if (CONSP (p
->status
))
3285 symbol
= XCONS (p
->status
)->car
;
3287 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
3288 || EQ (symbol
, Qclosed
))
3290 if (delete_exited_processes
)
3291 remove_process (proc
);
3293 deactivate_process (proc
);
3296 /* Now output the message suitably. */
3297 if (!NILP (p
->sentinel
))
3298 exec_sentinel (proc
, msg
);
3299 /* Don't bother with a message in the buffer
3300 when a process becomes runnable. */
3301 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
3303 Lisp_Object ro
, tem
;
3304 struct buffer
*old
= current_buffer
;
3307 ro
= XBUFFER (buffer
)->read_only
;
3309 /* Avoid error if buffer is deleted
3310 (probably that's why the process is dead, too) */
3311 if (NILP (XBUFFER (buffer
)->name
))
3313 Fset_buffer (buffer
);
3315 /* Insert new output into buffer
3316 at the current end-of-output marker,
3317 thus preserving logical ordering of input and output. */
3318 if (XMARKER (p
->mark
)->buffer
)
3319 SET_PT (marker_position (p
->mark
));
3322 if (point
<= opoint
)
3323 opoint
+= XSTRING (msg
)->size
+ XSTRING (p
->name
)->size
+ 10;
3325 tem
= current_buffer
->read_only
;
3326 current_buffer
->read_only
= Qnil
;
3327 insert_string ("\nProcess ");
3328 Finsert (1, &p
->name
);
3329 insert_string (" ");
3331 current_buffer
->read_only
= tem
;
3332 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
3335 set_buffer_internal (old
);
3340 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
3341 redisplay_preserve_echo_area ();
3343 update_tick
= process_tick
;
3348 /* The first time this is called, assume keyboard input comes from DESC
3349 instead of from where we used to expect it.
3350 Subsequent calls mean assume input keyboard can come from DESC
3351 in addition to other places. */
3353 static int add_keyboard_wait_descriptor_called_flag
;
3356 add_keyboard_wait_descriptor (desc
)
3359 if (! add_keyboard_wait_descriptor_called_flag
)
3360 FD_CLR (0, &input_wait_mask
);
3361 add_keyboard_wait_descriptor_called_flag
= 1;
3362 FD_SET (desc
, &input_wait_mask
);
3363 if (desc
> max_keyboard_desc
)
3364 max_keyboard_desc
= desc
;
3367 /* From now on, do not expect DESC to give keyboard input. */
3370 delete_keyboard_wait_descriptor (desc
)
3374 int lim
= max_keyboard_desc
;
3376 FD_CLR (desc
, &input_wait_mask
);
3378 if (desc
== max_keyboard_desc
)
3379 for (fd
= 0; fd
< lim
; fd
++)
3380 if (FD_ISSET (fd
, &input_wait_mask
)
3381 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3382 max_keyboard_desc
= fd
;
3385 /* Return nonzero if *MASK has a bit set
3386 that corresponds to one of the keyboard input descriptors. */
3389 keyboard_bit_set (mask
)
3394 for (fd
= 0; fd
< max_keyboard_desc
; fd
++)
3395 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
3396 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3408 if (! noninteractive
|| initialized
)
3410 signal (SIGCHLD
, sigchld_handler
);
3413 FD_ZERO (&input_wait_mask
);
3414 FD_ZERO (&non_keyboard_wait_mask
);
3415 max_process_desc
= 0;
3417 FD_SET (0, &input_wait_mask
);
3419 Vprocess_alist
= Qnil
;
3420 for (i
= 0; i
< MAXDESC
; i
++)
3422 chan_process
[i
] = Qnil
;
3423 proc_buffered_char
[i
] = -1;
3430 stream_process
= intern ("stream");
3432 Qprocessp
= intern ("processp");
3433 staticpro (&Qprocessp
);
3434 Qrun
= intern ("run");
3436 Qstop
= intern ("stop");
3438 Qsignal
= intern ("signal");
3439 staticpro (&Qsignal
);
3441 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
3444 Qexit = intern ("exit");
3445 staticpro (&Qexit); */
3447 Qopen
= intern ("open");
3449 Qclosed
= intern ("closed");
3450 staticpro (&Qclosed
);
3452 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
3453 staticpro (&Qlast_nonmenu_event
);
3455 staticpro (&Vprocess_alist
);
3457 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
3458 "*Non-nil means delete processes immediately when they exit.\n\
3459 nil means don't delete them until `list-processes' is run.");
3461 delete_exited_processes
= 1;
3463 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
3464 "Control type of device used to communicate with subprocesses.\n\
3465 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
3466 The value has no effect if the system has no ptys or if all ptys are busy:\n\
3467 then a pipe is used in any case.\n\
3468 The value takes effect when `start-process' is called.");
3469 Vprocess_connection_type
= Qt
;
3471 defsubr (&Sprocessp
);
3472 defsubr (&Sget_process
);
3473 defsubr (&Sget_buffer_process
);
3474 defsubr (&Sdelete_process
);
3475 defsubr (&Sprocess_status
);
3476 defsubr (&Sprocess_exit_status
);
3477 defsubr (&Sprocess_id
);
3478 defsubr (&Sprocess_name
);
3479 defsubr (&Sprocess_tty_name
);
3480 defsubr (&Sprocess_command
);
3481 defsubr (&Sset_process_buffer
);
3482 defsubr (&Sprocess_buffer
);
3483 defsubr (&Sprocess_mark
);
3484 defsubr (&Sset_process_filter
);
3485 defsubr (&Sprocess_filter
);
3486 defsubr (&Sset_process_sentinel
);
3487 defsubr (&Sset_process_window_size
);
3488 defsubr (&Sprocess_sentinel
);
3489 defsubr (&Sprocess_kill_without_query
);
3490 defsubr (&Slist_processes
);
3491 defsubr (&Sprocess_list
);
3492 defsubr (&Sstart_process
);
3494 defsubr (&Sopen_network_stream
);
3495 #endif /* HAVE_SOCKETS */
3496 defsubr (&Saccept_process_output
);
3497 defsubr (&Sprocess_send_region
);
3498 defsubr (&Sprocess_send_string
);
3499 defsubr (&Sinterrupt_process
);
3500 defsubr (&Skill_process
);
3501 defsubr (&Squit_process
);
3502 defsubr (&Sstop_process
);
3503 defsubr (&Scontinue_process
);
3504 defsubr (&Sprocess_send_eof
);
3505 defsubr (&Ssignal_process
);
3506 defsubr (&Swaiting_for_user_input_p
);
3507 /* defsubr (&Sprocess_connection); */
3511 #else /* not subprocesses */
3513 #include <sys/types.h>
3517 #include "systime.h"
3518 #include "termopts.h"
3520 extern int frame_garbaged
;
3523 /* As described above, except assuming that there are no subprocesses:
3525 Wait for timeout to elapse and/or keyboard input to be available.
3528 timeout in seconds, or
3529 zero for no limit, or
3530 -1 means gobble data immediately available but don't wait for any.
3532 read_kbd is a Lisp_Object:
3533 0 to ignore keyboard input, or
3534 1 to return when input is available, or
3535 -1 means caller will actually read the input, so don't throw to
3537 We know that read_kbd will never be a Lisp_Process, since
3538 `subprocesses' isn't defined.
3540 do_display != 0 means redisplay should be done to show subprocess
3541 output that arrives.
3543 Return true iff we received input from any process. */
3546 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
3547 int time_limit
, microsecs
;
3548 Lisp_Object read_kbd
;
3551 EMACS_TIME end_time
, timeout
, *timeout_p
;
3554 /* What does time_limit really mean? */
3555 if (time_limit
|| microsecs
)
3557 /* It's not infinite. */
3558 timeout_p
= &timeout
;
3560 if (time_limit
== -1)
3561 /* In fact, it's zero. */
3562 EMACS_SET_SECS_USECS (timeout
, 0, 0);
3564 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
3566 /* How far in the future is that? */
3567 EMACS_GET_TIME (end_time
);
3568 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
3571 /* It's infinite. */
3574 /* This must come before stop_polling. */
3575 prepare_menu_bars ();
3577 /* Turn off periodic alarms (in case they are in use)
3578 because the select emulator uses alarms. */
3585 waitchannels
= XINT (read_kbd
) ? 1 : 0;
3587 /* If calling from keyboard input, do not quit
3588 since we want to return C-g as an input character.
3589 Otherwise, do pending quit if requested. */
3590 if (XINT (read_kbd
) >= 0)
3595 EMACS_GET_TIME (*timeout_p
);
3596 EMACS_SUB_TIME (*timeout_p
, end_time
, *timeout_p
);
3597 if (EMACS_TIME_NEG_P (*timeout_p
))
3601 /* Cause C-g and alarm signals to take immediate action,
3602 and cause input available signals to zero out timeout. */
3603 if (XINT (read_kbd
) < 0)
3604 set_waiting_for_input (&timeout
);
3606 /* If a frame has been newly mapped and needs updating,
3607 reprocess its display stuff. */
3608 if (frame_garbaged
&& do_display
)
3609 redisplay_preserve_echo_area ();
3611 if (XINT (read_kbd
) && detect_input_pending ())
3614 nfds
= select (1, &waitchannels
, 0, 0, timeout_p
);
3616 /* Make C-g and alarm signals set flags again */
3617 clear_waiting_for_input ();
3619 /* If we woke up due to SIGWINCH, actually change size now. */
3620 do_pending_window_change ();
3624 /* If the system call was interrupted, then go around the
3630 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
3631 /* System sometimes fails to deliver SIGIO. */
3632 kill (getpid (), SIGIO
);
3635 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
3639 /* If we have timed out (nfds == 0) or found some input (nfds > 0),
3651 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
3652 /* Don't confuse make-docfile by having two doc strings for this function.
3653 make-docfile does not pay attention to #if, for good reason! */
3656 register Lisp_Object name
;
3661 /* Kill all processes associated with `buffer'.
3662 If `buffer' is nil, kill all processes.
3663 Since we have no subprocesses, this does nothing. */
3665 kill_buffer_processes (buffer
)
3676 defsubr (&Sget_buffer_process
);
3680 #endif /* not subprocesses */