1 /* Asynchronous subprocess control for GNU Emacs.
2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95 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
;
252 /* The file name of the pty opened by allocate_pty. */
254 static char pty_name
[24];
257 /* Compute the Lisp form of the process status, p->status, from
258 the numeric status that was returned by `wait'. */
260 Lisp_Object
status_convert ();
263 struct Lisp_Process
*p
;
265 union { int i
; WAITTYPE wt
; } u
;
266 u
.i
= XFASTINT (p
->raw_status_low
) + (XFASTINT (p
->raw_status_high
) << 16);
267 p
->status
= status_convert (u
.wt
);
268 p
->raw_status_low
= Qnil
;
269 p
->raw_status_high
= Qnil
;
272 /* Convert a process status word in Unix format to
273 the list that we use internally. */
280 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
281 else if (WIFEXITED (w
))
282 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
283 WCOREDUMP (w
) ? Qt
: Qnil
));
284 else if (WIFSIGNALED (w
))
285 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
286 WCOREDUMP (w
) ? Qt
: Qnil
));
291 /* Given a status-list, extract the three pieces of information
292 and store them individually through the three pointers. */
295 decode_status (l
, symbol
, code
, coredump
)
311 *symbol
= XCONS (l
)->car
;
312 tem
= XCONS (l
)->cdr
;
313 *code
= XFASTINT (XCONS (tem
)->car
);
314 tem
= XCONS (tem
)->cdr
;
315 *coredump
= !NILP (tem
);
319 /* Return a string describing a process status list. */
322 status_message (status
)
327 Lisp_Object string
, string2
;
329 decode_status (status
, &symbol
, &code
, &coredump
);
331 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
337 /* Cast to suppress warning if the table has const char *. */
338 signame
= (char *) sys_siglist
[code
];
340 signame
= sys_errlist
[code
];
345 string
= build_string (signame
);
346 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
347 XSTRING (string
)->data
[0] = DOWNCASE (XSTRING (string
)->data
[0]);
348 return concat2 (string
, string2
);
350 else if (EQ (symbol
, Qexit
))
353 return build_string ("finished\n");
354 string
= Fnumber_to_string (make_number (code
));
355 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
356 return concat2 (build_string ("exited abnormally with code "),
357 concat2 (string
, string2
));
360 return Fcopy_sequence (Fsymbol_name (symbol
));
365 /* Open an available pty, returning a file descriptor.
366 Return -1 on failure.
367 The file name of the terminal corresponding to the pty
368 is left in the variable pty_name. */
377 /* Some systems name their pseudoterminals so that there are gaps in
378 the usual sequence - for example, on HP9000/S700 systems, there
379 are no pseudoterminals with names ending in 'f'. So we wait for
380 three failures in a row before deciding that we've reached the
382 int failed_count
= 0;
387 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
388 for (i
= 0; i
< 16; i
++)
391 #ifdef PTY_NAME_SPRINTF
394 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
395 #endif /* no PTY_NAME_SPRINTF */
399 #else /* no PTY_OPEN */
401 /* Unusual IRIS code */
402 *ptyv
= open ("/dev/ptc", O_RDWR
| O_NDELAY
, 0);
405 if (fstat (fd
, &stb
) < 0)
408 if (stat (pty_name
, &stb
) < 0)
411 if (failed_count
>= 3)
417 fd
= open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
419 fd
= open (pty_name
, O_RDWR
| O_NDELAY
, 0);
421 #endif /* not IRIS */
422 #endif /* no PTY_OPEN */
426 /* check to make certain that both sides are available
427 this avoids a nasty yet stupid bug in rlogins */
428 #ifdef PTY_TTY_NAME_SPRINTF
431 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
432 #endif /* no PTY_TTY_NAME_SPRINTF */
434 if (access (pty_name
, 6) != 0)
437 #if !defined(IRIS) && !defined(__sgi)
443 #endif /* not UNIPLUS */
450 #endif /* HAVE_PTYS */
456 struct Lisp_Vector
*vec
;
457 register Lisp_Object val
, tem
, name1
;
458 register struct Lisp_Process
*p
;
462 vec
= allocate_vectorlike ((EMACS_INT
) VECSIZE (struct Lisp_Process
));
463 for (i
= 0; i
< VECSIZE (struct Lisp_Process
); i
++)
464 vec
->contents
[i
] = Qnil
;
465 vec
->size
= VECSIZE (struct Lisp_Process
);
466 p
= (struct Lisp_Process
*)vec
;
468 XSETINT (p
->infd
, -1);
469 XSETINT (p
->outfd
, -1);
470 XSETFASTINT (p
->pid
, 0);
471 XSETFASTINT (p
->tick
, 0);
472 XSETFASTINT (p
->update_tick
, 0);
473 p
->raw_status_low
= Qnil
;
474 p
->raw_status_high
= Qnil
;
476 p
->mark
= Fmake_marker ();
478 /* If name is already in use, modify it until it is unused. */
483 tem
= Fget_process (name1
);
484 if (NILP (tem
)) break;
485 sprintf (suffix
, "<%d>", i
);
486 name1
= concat2 (name
, build_string (suffix
));
490 XSETPROCESS (val
, p
);
491 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
495 remove_process (proc
)
496 register Lisp_Object proc
;
498 register Lisp_Object pair
;
500 pair
= Frassq (proc
, Vprocess_alist
);
501 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
502 Fset_marker (XPROCESS (proc
)->mark
, Qnil
, Qnil
);
504 deactivate_process (proc
);
507 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
508 "Return t if OBJECT is a process.")
512 return PROCESSP (obj
) ? Qt
: Qnil
;
515 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
516 "Return the process named NAME, or nil if there is none.")
518 register Lisp_Object name
;
522 CHECK_STRING (name
, 0);
523 return Fcdr (Fassoc (name
, Vprocess_alist
));
526 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
527 "Return the (or, a) process associated with BUFFER.\n\
528 BUFFER may be a buffer or the name of one.")
530 register Lisp_Object name
;
532 register Lisp_Object buf
, tail
, proc
;
534 if (NILP (name
)) return Qnil
;
535 buf
= Fget_buffer (name
);
536 if (NILP (buf
)) return Qnil
;
538 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
540 proc
= Fcdr (Fcar (tail
));
541 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
547 /* This is how commands for the user decode process arguments. It
548 accepts a process, a process name, a buffer, a buffer name, or nil.
549 Buffers denote the first process in the buffer, and nil denotes the
554 register Lisp_Object name
;
556 register Lisp_Object proc
, obj
;
559 obj
= Fget_process (name
);
561 obj
= Fget_buffer (name
);
563 error ("Process %s does not exist", XSTRING (name
)->data
);
565 else if (NILP (name
))
566 obj
= Fcurrent_buffer ();
570 /* Now obj should be either a buffer object or a process object.
574 proc
= Fget_buffer_process (obj
);
576 error ("Buffer %s has no process", XSTRING (XBUFFER (obj
)->name
)->data
);
580 CHECK_PROCESS (obj
, 0);
586 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
587 "Delete PROCESS: kill it and forget about it immediately.\n\
588 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
589 nil, indicating the current buffer's process.")
591 register Lisp_Object proc
;
593 proc
= get_process (proc
);
594 XPROCESS (proc
)->raw_status_low
= Qnil
;
595 XPROCESS (proc
)->raw_status_high
= Qnil
;
596 if (NETCONN_P (proc
))
598 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
599 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
601 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
603 Fkill_process (proc
, Qnil
);
604 /* Do this now, since remove_process will make sigchld_handler do nothing. */
605 XPROCESS (proc
)->status
606 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
607 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
610 remove_process (proc
);
614 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
615 "Return the status of PROCESS: a symbol, one of these:\n\
616 run -- for a process that is running.\n\
617 stop -- for a process stopped but continuable.\n\
618 exit -- for a process that has exited.\n\
619 signal -- for a process that has got a fatal signal.\n\
620 open -- for a network stream connection that is open.\n\
621 closed -- for a network stream connection that is closed.\n\
622 nil -- if arg is a process name and no such process exists.\n\
623 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
624 nil, indicating the current buffer's process.")
626 register Lisp_Object proc
;
628 register struct Lisp_Process
*p
;
629 register Lisp_Object status
;
632 proc
= Fget_process (proc
);
634 proc
= get_process (proc
);
640 if (!NILP (p
->raw_status_low
))
644 status
= XCONS (status
)->car
;
645 if (NETCONN_P (proc
))
647 if (EQ (status
, Qrun
))
649 else if (EQ (status
, Qexit
))
655 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
657 "Return the exit status of PROCESS or the signal number that killed it.\n\
658 If PROCESS has not yet exited or died, return 0.")
660 register Lisp_Object proc
;
662 CHECK_PROCESS (proc
, 0);
663 if (!NILP (XPROCESS (proc
)->raw_status_low
))
664 update_status (XPROCESS (proc
));
665 if (CONSP (XPROCESS (proc
)->status
))
666 return XCONS (XCONS (XPROCESS (proc
)->status
)->cdr
)->car
;
667 return make_number (0);
670 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
671 "Return the process id of PROCESS.\n\
672 This is the pid of the Unix process which PROCESS uses or talks to.\n\
673 For a network connection, this value is nil.")
675 register Lisp_Object proc
;
677 CHECK_PROCESS (proc
, 0);
678 return XPROCESS (proc
)->pid
;
681 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
682 "Return the name of PROCESS, as a string.\n\
683 This is the name of the program invoked in PROCESS,\n\
684 possibly modified to make it unique among process names.")
686 register Lisp_Object proc
;
688 CHECK_PROCESS (proc
, 0);
689 return XPROCESS (proc
)->name
;
692 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
693 "Return the command that was executed to start PROCESS.\n\
694 This is a list of strings, the first string being the program executed\n\
695 and the rest of the strings being the arguments given to it.\n\
696 For a non-child channel, this is nil.")
698 register Lisp_Object proc
;
700 CHECK_PROCESS (proc
, 0);
701 return XPROCESS (proc
)->command
;
704 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
705 "Return the name of the terminal PROCESS uses, or nil if none.\n\
706 This is the terminal that the process itself reads and writes on,\n\
707 not the name of the pty that Emacs uses to talk with that terminal.")
709 register Lisp_Object proc
;
711 CHECK_PROCESS (proc
, 0);
712 return XPROCESS (proc
)->tty_name
;
715 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
717 "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).")
719 register Lisp_Object proc
, buffer
;
721 CHECK_PROCESS (proc
, 0);
723 CHECK_BUFFER (buffer
, 1);
724 XPROCESS (proc
)->buffer
= buffer
;
728 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
730 "Return the buffer PROCESS is associated with.\n\
731 Output from PROCESS is inserted in this buffer\n\
732 unless PROCESS has a filter.")
734 register Lisp_Object proc
;
736 CHECK_PROCESS (proc
, 0);
737 return XPROCESS (proc
)->buffer
;
740 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
742 "Return the marker for the end of the last output from PROCESS.")
744 register Lisp_Object proc
;
746 CHECK_PROCESS (proc
, 0);
747 return XPROCESS (proc
)->mark
;
750 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
752 "Give PROCESS the filter function FILTER; nil means no filter.\n\
753 t means stop accepting output from the process.\n\
754 When a process has a filter, each time it does output\n\
755 the entire string of output is passed to the filter.\n\
756 The filter gets two arguments: the process and the string of output.\n\
757 If the process has a filter, its buffer is not used for output.")
759 register Lisp_Object proc
, filter
;
761 CHECK_PROCESS (proc
, 0);
764 FD_CLR (XINT (XPROCESS (proc
)->infd
), &input_wait_mask
);
765 FD_CLR (XINT (XPROCESS (proc
)->infd
), &non_keyboard_wait_mask
);
767 else if (EQ (XPROCESS (proc
)->filter
, Qt
))
769 FD_SET (XINT (XPROCESS (proc
)->infd
), &input_wait_mask
);
770 FD_SET (XINT (XPROCESS (proc
)->infd
), &non_keyboard_wait_mask
);
772 XPROCESS (proc
)->filter
= filter
;
776 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
778 "Returns the filter function of PROCESS; nil if none.\n\
779 See `set-process-filter' for more info on filter functions.")
781 register Lisp_Object proc
;
783 CHECK_PROCESS (proc
, 0);
784 return XPROCESS (proc
)->filter
;
787 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
789 "Give PROCESS the sentinel SENTINEL; nil for none.\n\
790 The sentinel is called as a function when the process changes state.\n\
791 It gets two arguments: the process, and a string describing the change.")
793 register Lisp_Object proc
, sentinel
;
795 CHECK_PROCESS (proc
, 0);
796 XPROCESS (proc
)->sentinel
= sentinel
;
800 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
802 "Return the sentinel of PROCESS; nil if none.\n\
803 See `set-process-sentinel' for more info on sentinels.")
805 register Lisp_Object proc
;
807 CHECK_PROCESS (proc
, 0);
808 return XPROCESS (proc
)->sentinel
;
811 DEFUN ("set-process-window-size", Fset_process_window_size
,
812 Sset_process_window_size
, 3, 3, 0,
813 "Tell PROCESS that it has logical window size HEIGHT and WIDTH.")
814 (proc
, height
, width
)
815 register Lisp_Object proc
, height
, width
;
817 CHECK_PROCESS (proc
, 0);
818 CHECK_NATNUM (height
, 0);
819 CHECK_NATNUM (width
, 0);
820 if (set_window_size (XINT (XPROCESS (proc
)->infd
),
821 XINT (height
), XINT(width
)) <= 0)
827 DEFUN ("process-kill-without-query", Fprocess_kill_without_query
,
828 Sprocess_kill_without_query
, 1, 2, 0,
829 "Say no query needed if PROCESS is running when Emacs is exited.\n\
830 Optional second argument if non-nil says to require a query.\n\
831 Value is t if a query was formerly required.")
833 register Lisp_Object proc
, value
;
837 CHECK_PROCESS (proc
, 0);
838 tem
= XPROCESS (proc
)->kill_without_query
;
839 XPROCESS (proc
)->kill_without_query
= Fnull (value
);
844 #if 0 /* Turned off because we don't currently record this info
845 in the process. Perhaps add it. */
846 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
847 "Return the connection type of `PROCESS'.\n\
848 The value is `nil' for a pipe,\n\
849 `t' or `pty' for a pty, or `stream' for a socket connection.")
853 return XPROCESS (process
)->type
;
860 register Lisp_Object tail
, tem
;
861 Lisp_Object proc
, minspace
, tem1
;
862 register struct buffer
*old
= current_buffer
;
863 register struct Lisp_Process
*p
;
867 XSETFASTINT (minspace
, 1);
869 set_buffer_internal (XBUFFER (Vstandard_output
));
870 Fbuffer_disable_undo (Vstandard_output
);
872 current_buffer
->truncate_lines
= Qt
;
875 Proc Status Buffer Tty Command\n\
876 ---- ------ ------ --- -------\n", -1);
878 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
882 proc
= Fcdr (Fcar (tail
));
884 if (NILP (p
->childp
))
887 Finsert (1, &p
->name
);
888 Findent_to (make_number (13), minspace
);
890 if (!NILP (p
->raw_status_low
))
893 if (CONSP (p
->status
))
894 symbol
= XCONS (p
->status
)->car
;
897 if (EQ (symbol
, Qsignal
))
900 tem
= Fcar (Fcdr (p
->status
));
902 if (XINT (tem
) < NSIG
)
903 write_string (sys_errlist
[XINT (tem
)], -1);
906 Fprinc (symbol
, Qnil
);
908 else if (NETCONN_P (proc
))
910 if (EQ (symbol
, Qrun
))
911 write_string ("open", -1);
912 else if (EQ (symbol
, Qexit
))
913 write_string ("closed", -1);
915 Fprinc (symbol
, Qnil
);
918 Fprinc (symbol
, Qnil
);
920 if (EQ (symbol
, Qexit
))
923 tem
= Fcar (Fcdr (p
->status
));
926 sprintf (tembuf
, " %d", (int) XFASTINT (tem
));
927 write_string (tembuf
, -1);
931 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
932 remove_process (proc
);
934 Findent_to (make_number (22), minspace
);
935 if (NILP (p
->buffer
))
936 insert_string ("(none)");
937 else if (NILP (XBUFFER (p
->buffer
)->name
))
938 insert_string ("(Killed)");
940 Finsert (1, &XBUFFER (p
->buffer
)->name
);
942 Findent_to (make_number (37), minspace
);
944 if (STRINGP (p
->tty_name
))
945 Finsert (1, &p
->tty_name
);
947 insert_string ("(none)");
949 Findent_to (make_number (49), minspace
);
951 if (NETCONN_P (proc
))
953 sprintf (tembuf
, "(network stream connection to %s)\n",
954 XSTRING (p
->childp
)->data
);
955 insert_string (tembuf
);
969 insert_string ("\n");
975 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 0, "",
976 "Display a list of all processes.\n\
977 \(Any processes listed as Exited or Signaled are actually eliminated\n\
978 after the listing is made.)")
981 internal_with_output_to_temp_buffer ("*Process List*",
982 list_processes_1
, Qnil
);
986 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
987 "Return a list of all processes.")
990 return Fmapcar (Qcdr
, Vprocess_alist
);
993 /* Starting asynchronous inferior processes. */
995 static Lisp_Object
start_process_unwind ();
997 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
998 "Start a program in a subprocess. Return the process object for it.\n\
999 Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\
1000 NAME is name for process. It is modified if necessary to make it unique.\n\
1001 BUFFER is the buffer or (buffer-name) to associate with the process.\n\
1002 Process output goes at end of that buffer, unless you specify\n\
1003 an output stream or filter function to handle the output.\n\
1004 BUFFER may be also nil, meaning that this process is not associated\n\
1006 Third arg is program file name. It is searched for as in the shell.\n\
1007 Remaining arguments are strings to give program as arguments.")
1010 register Lisp_Object
*args
;
1012 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1014 register unsigned char *new_argv
;
1017 register unsigned char **new_argv
;
1020 int count
= specpdl_ptr
- specpdl
;
1024 buffer
= Fget_buffer_create (buffer
);
1026 /* Make sure that the child will be able to chdir to the current
1027 buffer's current directory, or its unhandled equivalent. We
1028 can't just have the child check for an error when it does the
1029 chdir, since it's in a vfork.
1031 We have to GCPRO around this because Fexpand_file_name and
1032 Funhandled_file_name_directory might call a file name handling
1033 function. The argument list is protected by the caller, so all
1034 we really have to worry about is buffer. */
1036 struct gcpro gcpro1
, gcpro2
;
1038 current_dir
= current_buffer
->directory
;
1040 GCPRO2 (buffer
, current_dir
);
1043 = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir
),
1045 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1046 report_file_error ("Setting current directory",
1047 Fcons (current_buffer
->directory
, Qnil
));
1053 CHECK_STRING (name
, 0);
1057 CHECK_STRING (program
, 2);
1060 /* Make a one member argv with all args concatenated
1061 together separated by a blank. */
1062 len
= XSTRING (program
)->size
+ 2;
1063 for (i
= 3; i
< nargs
; i
++)
1066 CHECK_STRING (tem
, i
);
1067 len
+= XSTRING (tem
)->size
+ 1; /* count the blank */
1069 new_argv
= (unsigned char *) alloca (len
);
1070 strcpy (new_argv
, XSTRING (program
)->data
);
1071 for (i
= 3; i
< nargs
; i
++)
1074 CHECK_STRING (tem
, i
);
1075 strcat (new_argv
, " ");
1076 strcat (new_argv
, XSTRING (tem
)->data
);
1078 /* Need to add code here to check for program existence on VMS */
1081 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1083 /* If program file name is not absolute, search our path for it */
1084 if (!IS_DIRECTORY_SEP (XSTRING (program
)->data
[0])
1085 && !(XSTRING (program
)->size
> 1
1086 && IS_DEVICE_SEP (XSTRING (program
)->data
[1])))
1088 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1091 GCPRO4 (name
, program
, buffer
, current_dir
);
1092 openp (Vexec_path
, program
, EXEC_SUFFIXES
, &tem
, 1);
1095 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1096 new_argv
[0] = XSTRING (tem
)->data
;
1099 new_argv
[0] = XSTRING (program
)->data
;
1101 for (i
= 3; i
< nargs
; i
++)
1104 CHECK_STRING (tem
, i
);
1105 new_argv
[i
- 2] = XSTRING (tem
)->data
;
1107 new_argv
[i
- 2] = 0;
1108 #endif /* not VMS */
1110 proc
= make_process (name
);
1111 /* If an error occurs and we can't start the process, we want to
1112 remove it from the process list. This means that each error
1113 check in create_process doesn't need to call remove_process
1114 itself; it's all taken care of here. */
1115 record_unwind_protect (start_process_unwind
, proc
);
1117 XPROCESS (proc
)->childp
= Qt
;
1118 XPROCESS (proc
)->command_channel_p
= Qnil
;
1119 XPROCESS (proc
)->buffer
= buffer
;
1120 XPROCESS (proc
)->sentinel
= Qnil
;
1121 XPROCESS (proc
)->filter
= Qnil
;
1122 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1124 /* Make the process marker point into the process buffer (if any). */
1126 Fset_marker (XPROCESS (proc
)->mark
,
1127 make_number (BUF_ZV (XBUFFER (buffer
))), buffer
);
1129 create_process (proc
, new_argv
, current_dir
);
1131 return unbind_to (count
, proc
);
1134 /* This function is the unwind_protect form for Fstart_process. If
1135 PROC doesn't have its pid set, then we know someone has signalled
1136 an error and the process wasn't started successfully, so we should
1137 remove it from the process list. */
1139 start_process_unwind (proc
)
1142 if (!PROCESSP (proc
))
1145 /* Was PROC started successfully? */
1146 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1147 remove_process (proc
);
1154 create_process_1 (signo
)
1158 /* USG systems forget handlers when they are used;
1159 must reestablish each time */
1160 signal (signo
, create_process_1
);
1164 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1167 /* Mimic blocking of signals on system V, which doesn't really have it. */
1169 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1170 int sigchld_deferred
;
1173 create_process_sigchld ()
1175 signal (SIGCHLD
, create_process_sigchld
);
1177 sigchld_deferred
= 1;
1183 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1184 create_process (process
, new_argv
, current_dir
)
1185 Lisp_Object process
;
1187 Lisp_Object current_dir
;
1189 int pid
, inchannel
, outchannel
, forkin
, forkout
;
1192 SIGTYPE (*sigchld
)();
1195 extern char **environ
;
1197 inchannel
= outchannel
= -1;
1200 if (!NILP (Vprocess_connection_type
))
1201 outchannel
= inchannel
= allocate_pty ();
1206 /* On USG systems it does not work to open the pty's tty here
1207 and then close and reopen it in the child. */
1209 /* Don't let this terminal become our controlling terminal
1210 (in case we don't have one). */
1211 forkout
= forkin
= open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1213 forkout
= forkin
= open (pty_name
, O_RDWR
, 0);
1216 report_file_error ("Opening pty", Qnil
);
1218 forkin
= forkout
= -1;
1219 #endif /* not USG */
1223 #endif /* HAVE_PTYS */
1226 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1227 report_file_error ("Opening socketpair", Qnil
);
1228 outchannel
= inchannel
= sv
[0];
1229 forkout
= forkin
= sv
[1];
1231 #else /* not SKTPAIR */
1234 pipe_with_inherited_out (sv
);
1238 pipe_with_inherited_in (sv
);
1241 #else /* not WINDOWSNT */
1248 #endif /* not WINDOWSNT */
1250 #endif /* not SKTPAIR */
1253 /* Replaced by close_process_descs */
1254 set_exclusive_use (inchannel
);
1255 set_exclusive_use (outchannel
);
1258 /* Stride people say it's a mystery why this is needed
1259 as well as the O_NDELAY, but that it fails without this. */
1260 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1263 ioctl (inchannel
, FIONBIO
, &one
);
1268 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1271 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1275 /* Record this as an active process, with its channels.
1276 As a result, child_setup will close Emacs's side of the pipes. */
1277 chan_process
[inchannel
] = process
;
1278 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1279 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1280 /* Record the tty descriptor used in the subprocess. */
1282 XPROCESS (process
)->subtty
= Qnil
;
1284 XSETFASTINT (XPROCESS (process
)->subtty
, forkin
);
1285 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1286 XPROCESS (process
)->status
= Qrun
;
1288 /* Delay interrupts until we have a chance to store
1289 the new fork's pid in its process structure */
1293 #else /* not BSD4_1 */
1294 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1295 sigsetmask (sigmask (SIGCHLD
));
1296 #else /* ordinary USG */
1298 sigchld_deferred
= 0;
1299 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1301 #endif /* ordinary USG */
1302 #endif /* not BSD4_1 */
1303 #endif /* SIGCHLD */
1305 FD_SET (inchannel
, &input_wait_mask
);
1306 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1307 if (inchannel
> max_process_desc
)
1308 max_process_desc
= inchannel
;
1310 /* Until we store the proper pid, enable sigchld_handler
1311 to recognize an unknown pid as standing for this process.
1312 It is very important not to let this `marker' value stay
1313 in the table after this function has returned; if it does
1314 it might cause call-process to hang and subsequent asynchronous
1315 processes to get their return values scrambled. */
1316 XSETINT (XPROCESS (process
)->pid
, -1);
1319 /* child_setup must clobber environ on systems with true vfork.
1320 Protect it from permanent change. */
1321 char **save_environ
= environ
;
1326 #endif /* not WINDOWSNT */
1328 int xforkin
= forkin
;
1329 int xforkout
= forkout
;
1331 #if 0 /* This was probably a mistake--it duplicates code later on,
1332 but fails to handle all the cases. */
1333 /* Make sure SIGCHLD is not blocked in the child. */
1334 sigsetmask (SIGEMPTYMASK
);
1337 /* Make the pty be the controlling terminal of the process. */
1339 /* First, disconnect its current controlling terminal. */
1341 /* We tried doing setsid only if pty_flag, but it caused
1342 process_set_signal to fail on SGI when using a pipe. */
1344 /* Make the pty's terminal the controlling terminal. */
1348 /* We ignore the return value
1349 because faith@cs.unc.edu says that is necessary on Linux. */
1350 ioctl (xforkin
, TIOCSCTTY
, 0);
1353 #else /* not HAVE_SETSID */
1355 /* It's very important to call setpgrp here and no time
1356 afterwards. Otherwise, we lose our controlling tty which
1357 is set when we open the pty. */
1360 #endif /* not HAVE_SETSID */
1361 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1362 if (pty_flag
&& xforkin
>= 0)
1365 tcgetattr (xforkin
, &t
);
1367 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1368 write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1371 #if defined (NTTYDISC) && defined (TIOCSETD)
1372 if (pty_flag
&& xforkin
>= 0)
1374 /* Use new line discipline. */
1375 int ldisc
= NTTYDISC
;
1376 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1381 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1382 can do TIOCSPGRP only to the process's controlling tty. */
1385 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1386 I can't test it since I don't have 4.3. */
1387 int j
= open ("/dev/tty", O_RDWR
, 0);
1388 ioctl (j
, TIOCNOTTY
, 0);
1391 /* In order to get a controlling terminal on some versions
1392 of BSD, it is necessary to put the process in pgrp 0
1393 before it opens the terminal. */
1401 #endif /* TIOCNOTTY */
1403 #if !defined (RTU) && !defined (UNIPLUS)
1404 /*** There is a suggestion that this ought to be a
1405 conditional on TIOCSPGRP. */
1406 /* Now close the pty (if we had it open) and reopen it.
1407 This makes the pty the controlling terminal of the subprocess. */
1410 #ifdef SET_CHILD_PTY_PGRP
1411 int pgrp
= getpid ();
1414 /* I wonder if close (open (pty_name, ...)) would work? */
1417 xforkout
= xforkin
= open (pty_name
, O_RDWR
, 0);
1421 write (1, "Couldn't open the pty terminal ", 31);
1422 write (1, pty_name
, strlen (pty_name
));
1427 #ifdef SET_CHILD_PTY_PGRP
1428 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1429 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1432 #endif /* not UNIPLUS and not RTU */
1433 #ifdef SETUP_SLAVE_PTY
1438 #endif /* SETUP_SLAVE_PTY */
1440 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1441 Now reenable it in the child, so it will die when we want it to. */
1443 signal (SIGHUP
, SIG_DFL
);
1445 #endif /* HAVE_PTYS */
1450 #else /* not BSD4_1 */
1451 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1452 sigsetmask (SIGEMPTYMASK
);
1453 #else /* ordinary USG */
1455 signal (SIGCHLD
, sigchld
);
1457 #endif /* ordinary USG */
1458 #endif /* not BSD4_1 */
1459 #endif /* SIGCHLD */
1461 signal (SIGINT
, SIG_DFL
);
1462 signal (SIGQUIT
, SIG_DFL
);
1465 child_setup_tty (xforkout
);
1467 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1468 new_argv
, 1, current_dir
);
1469 #else /* not WINDOWSNT */
1470 child_setup (xforkin
, xforkout
, xforkout
,
1471 new_argv
, 1, current_dir
);
1472 #endif /* not WINDOWSNT */
1474 environ
= save_environ
;
1481 if (forkin
!= forkout
&& forkout
>= 0)
1483 report_file_error ("Doing vfork", Qnil
);
1486 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
1489 register_child (pid
, inchannel
);
1490 #endif /* WINDOWSNT */
1492 /* If the subfork execv fails, and it exits,
1493 this close hangs. I don't know why.
1494 So have an interrupt jar it loose. */
1496 signal (SIGALRM
, create_process_1
);
1498 XPROCESS (process
)->subtty
= Qnil
;
1503 if (forkin
!= forkout
&& forkout
>= 0)
1508 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1511 XPROCESS (process
)->tty_name
= Qnil
;
1516 #else /* not BSD4_1 */
1517 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1518 sigsetmask (SIGEMPTYMASK
);
1519 #else /* ordinary USG */
1521 signal (SIGCHLD
, sigchld
);
1522 /* Now really handle any of these signals
1523 that came in during this function. */
1524 if (sigchld_deferred
)
1525 kill (getpid (), SIGCHLD
);
1527 #endif /* ordinary USG */
1528 #endif /* not BSD4_1 */
1529 #endif /* SIGCHLD */
1531 #endif /* not VMS */
1535 /* open a TCP network connection to a given HOST/SERVICE. Treated
1536 exactly like a normal process when reading and writing. Only
1537 differences are in status display and process deletion. A network
1538 connection has no PID; you cannot signal it. All you can do is
1539 deactivate and close it via delete-process */
1541 DEFUN ("open-network-stream", Fopen_network_stream
, Sopen_network_stream
,
1543 "Open a TCP connection for a service to a host.\n\
1544 Returns a subprocess-object to represent the connection.\n\
1545 Input and output work as for subprocesses; `delete-process' closes it.\n\
1546 Args are NAME BUFFER HOST SERVICE.\n\
1547 NAME is name for process. It is modified if necessary to make it unique.\n\
1548 BUFFER is the buffer (or buffer-name) to associate with the process.\n\
1549 Process output goes at end of that buffer, unless you specify\n\
1550 an output stream or filter function to handle the output.\n\
1551 BUFFER may be also nil, meaning that this process is not associated\n\
1553 Third arg is name of the host to connect to, or its IP address.\n\
1554 Fourth arg SERVICE is name of the service desired, or an integer\n\
1555 specifying a port number to connect to.")
1556 (name
, buffer
, host
, service
)
1557 Lisp_Object name
, buffer
, host
, service
;
1561 struct sockaddr_in address
;
1562 struct servent
*svc_info
;
1563 struct hostent
*host_info_ptr
, host_info
;
1564 char *(addr_list
[2]);
1565 IN_ADDR numeric_addr
;
1569 struct hostent host_info_fixed
;
1570 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1572 int count
= specpdl_ptr
- specpdl
;
1574 GCPRO4 (name
, buffer
, host
, service
);
1575 CHECK_STRING (name
, 0);
1576 CHECK_STRING (host
, 0);
1577 if (INTEGERP (service
))
1578 port
= htons ((unsigned short) XINT (service
));
1581 CHECK_STRING (service
, 0);
1582 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
1584 error ("Unknown service \"%s\"", XSTRING (service
)->data
);
1585 port
= svc_info
->s_port
;
1594 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
1596 if (! (host_info_ptr
== 0 && h_errno
== TRY_AGAIN
))
1599 Fsleep_for (make_number (1), Qnil
);
1601 if (host_info_ptr
== 0)
1602 /* Attempt to interpret host as numeric inet address */
1604 numeric_addr
= inet_addr ((char *) XSTRING (host
)->data
);
1605 if (NUMERIC_ADDR_ERROR
)
1606 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
1608 host_info_ptr
= &host_info
;
1609 host_info
.h_name
= 0;
1610 host_info
.h_aliases
= 0;
1611 host_info
.h_addrtype
= AF_INET
;
1613 /* Older machines have only one address slot called h_addr.
1614 Newer machines have h_addr_list, but #define h_addr to
1615 be its first element. */
1616 host_info
.h_addr_list
= &(addr_list
[0]);
1618 host_info
.h_addr
= (char*)(&numeric_addr
);
1620 host_info
.h_length
= strlen (addr_list
[0]);
1623 bzero (&address
, sizeof address
);
1624 bcopy (host_info_ptr
->h_addr
, (char *) &address
.sin_addr
,
1625 host_info_ptr
->h_length
);
1626 address
.sin_family
= host_info_ptr
->h_addrtype
;
1627 address
.sin_port
= port
;
1629 s
= socket (host_info_ptr
->h_addrtype
, SOCK_STREAM
, 0);
1631 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1633 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
1634 when connect is interrupted. So let's not let it get interrupted.
1635 Note we do not turn off polling, because polling is only used
1636 when not interrupt_input, and thus not normally used on the systems
1637 which have this bug. On systems which use polling, there's no way
1638 to quit if polling is turned off. */
1639 if (interrupt_input
)
1642 /* Slow down polling to every ten seconds.
1643 Some kernels have a bug which causes retrying connect to fail
1645 #ifdef POLL_FOR_INPUT
1646 bind_polling_period (10);
1650 if (connect (s
, (struct sockaddr
*) &address
, sizeof address
) == -1
1651 && errno
!= EISCONN
)
1657 if (errno
== EADDRINUSE
&& retry
< 20)
1665 if (interrupt_input
)
1669 report_file_error ("connection failed",
1670 Fcons (host
, Fcons (name
, Qnil
)));
1673 #ifdef POLL_FOR_INPUT
1674 unbind_to (count
, Qnil
);
1677 if (interrupt_input
)
1681 s
= connect_server (0);
1683 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1684 send_command (s
, C_PORT
, 0, "%s:%d", XSTRING (host
)->data
, ntohs (port
));
1685 send_command (s
, C_DUMB
, 1, 0);
1691 report_file_error ("error duplicating socket", Fcons (name
, Qnil
));
1694 buffer
= Fget_buffer_create (buffer
);
1695 proc
= make_process (name
);
1697 chan_process
[inch
] = proc
;
1700 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
1703 fcntl (inch
, F_SETFL
, O_NDELAY
);
1707 XPROCESS (proc
)->childp
= host
;
1708 XPROCESS (proc
)->command_channel_p
= Qnil
;
1709 XPROCESS (proc
)->buffer
= buffer
;
1710 XPROCESS (proc
)->sentinel
= Qnil
;
1711 XPROCESS (proc
)->filter
= Qnil
;
1712 XPROCESS (proc
)->command
= Qnil
;
1713 XPROCESS (proc
)->pid
= Qnil
;
1714 XSETINT (XPROCESS (proc
)->infd
, s
);
1715 XSETINT (XPROCESS (proc
)->outfd
, outch
);
1716 XPROCESS (proc
)->status
= Qrun
;
1717 FD_SET (inch
, &input_wait_mask
);
1718 FD_SET (inch
, &non_keyboard_wait_mask
);
1719 if (inch
> max_process_desc
)
1720 max_process_desc
= inch
;
1725 #endif /* HAVE_SOCKETS */
1727 deactivate_process (proc
)
1730 register int inchannel
, outchannel
;
1731 register struct Lisp_Process
*p
= XPROCESS (proc
);
1733 inchannel
= XINT (p
->infd
);
1734 outchannel
= XINT (p
->outfd
);
1738 /* Beware SIGCHLD hereabouts. */
1739 flush_pending_output (inchannel
);
1742 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
1743 sys$
dassgn (outchannel
);
1744 vs
= get_vms_process_pointer (p
->pid
);
1746 give_back_vms_process_stuff (vs
);
1750 if (outchannel
>= 0 && outchannel
!= inchannel
)
1754 XSETINT (p
->infd
, -1);
1755 XSETINT (p
->outfd
, -1);
1756 chan_process
[inchannel
] = Qnil
;
1757 FD_CLR (inchannel
, &input_wait_mask
);
1758 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
1759 if (inchannel
== max_process_desc
)
1762 /* We just closed the highest-numbered process input descriptor,
1763 so recompute the highest-numbered one now. */
1764 max_process_desc
= 0;
1765 for (i
= 0; i
< MAXDESC
; i
++)
1766 if (!NILP (chan_process
[i
]))
1767 max_process_desc
= i
;
1772 /* Close all descriptors currently in use for communication
1773 with subprocess. This is used in a newly-forked subprocess
1774 to get rid of irrelevant descriptors. */
1776 close_process_descs ()
1780 for (i
= 0; i
< MAXDESC
; i
++)
1782 Lisp_Object process
;
1783 process
= chan_process
[i
];
1784 if (!NILP (process
))
1786 int in
= XINT (XPROCESS (process
)->infd
);
1787 int out
= XINT (XPROCESS (process
)->outfd
);
1790 if (out
>= 0 && in
!= out
)
1797 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
1799 "Allow any pending output from subprocesses to be read by Emacs.\n\
1800 It is read into the process' buffers or given to their filter functions.\n\
1801 Non-nil arg PROCESS means do not return until some output has been received\n\
1803 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
1804 seconds and microseconds to wait; return after that much time whether\n\
1805 or not there is input.\n\
1806 Return non-nil iff we received any output before the timeout expired.")
1807 (proc
, timeout
, timeout_msecs
)
1808 register Lisp_Object proc
, timeout
, timeout_msecs
;
1813 if (! NILP (timeout_msecs
))
1815 CHECK_NUMBER (timeout_msecs
, 2);
1816 useconds
= XINT (timeout_msecs
);
1817 if (!INTEGERP (timeout
))
1818 XSETINT (timeout
, 0);
1821 int carry
= useconds
/ 1000000;
1823 XSETINT (timeout
, XINT (timeout
) + carry
);
1824 useconds
-= carry
* 1000000;
1826 /* I think this clause is necessary because C doesn't
1827 guarantee a particular rounding direction for negative
1831 XSETINT (timeout
, XINT (timeout
) - 1);
1832 useconds
+= 1000000;
1839 if (! NILP (timeout
))
1841 CHECK_NUMBER (timeout
, 1);
1842 seconds
= XINT (timeout
);
1855 XSETFASTINT (proc
, 0);
1858 (wait_reading_process_input (seconds
, useconds
, proc
, 0)
1862 /* This variable is different from waiting_for_input in keyboard.c.
1863 It is used to communicate to a lisp process-filter/sentinel (via the
1864 function Fwaiting_for_user_input_p below) whether emacs was waiting
1865 for user-input when that process-filter was called.
1866 waiting_for_input cannot be used as that is by definition 0 when
1867 lisp code is being evalled.
1868 This is also used in record_asynch_buffer_change.
1869 For that purpose, this must be 0
1870 when not inside wait_reading_process_input. */
1871 static int waiting_for_user_input_p
;
1873 /* Read and dispose of subprocess output while waiting for timeout to
1874 elapse and/or keyboard input to be available.
1877 timeout in seconds, or
1878 zero for no limit, or
1879 -1 means gobble data immediately available but don't wait for any.
1882 an additional duration to wait, measured in microseconds.
1883 If this is nonzero and time_limit is 0, then the timeout
1884 consists of MICROSECS only.
1886 READ_KBD is a lisp value:
1887 0 to ignore keyboard input, or
1888 1 to return when input is available, or
1889 -1 meaning caller will actually read the input, so don't throw to
1890 the quit handler, or
1891 a cons cell, meaning wait until its car is non-nil
1892 (and gobble terminal input into the buffer if any arrives), or
1893 a process object, meaning wait until something arrives from that
1894 process. The return value is true iff we read some input from
1897 DO_DISPLAY != 0 means redisplay should be done to show subprocess
1898 output that arrives.
1900 If READ_KBD is a pointer to a struct Lisp_Process, then the
1901 function returns true iff we received input from that process
1902 before the timeout elapsed.
1903 Otherwise, return true iff we received input from any process. */
1905 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
1906 int time_limit
, microsecs
;
1907 Lisp_Object read_kbd
;
1910 register int channel
, nfds
, m
;
1911 static SELECT_TYPE Available
;
1914 EMACS_TIME timeout
, end_time
, garbage
;
1916 int wait_channel
= -1;
1917 struct Lisp_Process
*wait_proc
= 0;
1918 int got_some_input
= 0;
1919 Lisp_Object
*wait_for_cell
= 0;
1921 FD_ZERO (&Available
);
1923 /* If read_kbd is a process to watch, set wait_proc and wait_channel
1925 if (PROCESSP (read_kbd
))
1927 wait_proc
= XPROCESS (read_kbd
);
1928 wait_channel
= XINT (wait_proc
->infd
);
1929 XSETFASTINT (read_kbd
, 0);
1932 /* If waiting for non-nil in a cell, record where. */
1933 if (CONSP (read_kbd
))
1935 wait_for_cell
= &XCONS (read_kbd
)->car
;
1936 XSETFASTINT (read_kbd
, 0);
1939 waiting_for_user_input_p
= XINT (read_kbd
);
1941 /* Since we may need to wait several times,
1942 compute the absolute time to return at. */
1943 if (time_limit
|| microsecs
)
1945 EMACS_GET_TIME (end_time
);
1946 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
1947 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
1952 /* If calling from keyboard input, do not quit
1953 since we want to return C-g as an input character.
1954 Otherwise, do pending quit if requested. */
1955 if (XINT (read_kbd
) >= 0)
1958 /* Exit now if the cell we're waiting for became non-nil. */
1959 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
1962 /* Compute time from now till when time limit is up */
1963 /* Exit if already run out */
1964 if (time_limit
== -1)
1966 /* -1 specified for timeout means
1967 gobble output available now
1968 but don't wait at all. */
1970 EMACS_SET_SECS_USECS (timeout
, 0, 0);
1972 else if (time_limit
|| microsecs
)
1974 EMACS_GET_TIME (timeout
);
1975 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
1976 if (EMACS_TIME_NEG_P (timeout
))
1981 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
1984 /* Cause C-g and alarm signals to take immediate action,
1985 and cause input available signals to zero out timeout.
1987 It is important that we do this before checking for process
1988 activity. If we get a SIGCHLD after the explicit checks for
1989 process activity, timeout is the only way we will know. */
1990 if (XINT (read_kbd
) < 0)
1991 set_waiting_for_input (&timeout
);
1993 /* If status of something has changed, and no input is
1994 available, notify the user of the change right away. After
1995 this explicit check, we'll let the SIGCHLD handler zap
1996 timeout to get our attention. */
1997 if (update_tick
!= process_tick
&& do_display
)
1999 Atemp
= input_wait_mask
;
2000 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2001 if (select (MAXDESC
, &Atemp
, 0, 0, &timeout
) <= 0)
2003 /* It's okay for us to do this and then continue with
2004 the loop, since timeout has already been zeroed out. */
2005 clear_waiting_for_input ();
2010 /* Don't wait for output from a non-running process. */
2011 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
2012 update_status (wait_proc
);
2014 && ! EQ (wait_proc
->status
, Qrun
))
2016 clear_waiting_for_input ();
2020 /* Wait till there is something to do */
2022 if (! XINT (read_kbd
) && wait_for_cell
== 0)
2023 Available
= non_keyboard_wait_mask
;
2025 Available
= input_wait_mask
;
2027 /* If frame size has changed or the window is newly mapped,
2028 redisplay now, before we start to wait. There is a race
2029 condition here; if a SIGIO arrives between now and the select
2030 and indicates that a frame is trashed, the select may block
2031 displaying a trashed screen. */
2032 if (frame_garbaged
&& do_display
)
2034 clear_waiting_for_input ();
2035 redisplay_preserve_echo_area ();
2036 if (XINT (read_kbd
) < 0)
2037 set_waiting_for_input ();
2040 if (XINT (read_kbd
) && detect_input_pending ())
2043 FD_ZERO (&Available
);
2046 nfds
= select (MAXDESC
, &Available
, 0, 0, &timeout
);
2050 /* Make C-g and alarm signals set flags again */
2051 clear_waiting_for_input ();
2053 /* If we woke up due to SIGWINCH, actually change size now. */
2054 do_pending_window_change ();
2056 if (time_limit
&& nfds
== 0) /* timeout elapsed */
2060 if (xerrno
== EINTR
)
2061 FD_ZERO (&Available
);
2063 /* Ultrix select seems to return ENOMEM when it is
2064 interrupted. Treat it just like EINTR. Bleah. Note
2065 that we want to test for the "ultrix" CPP symbol, not
2066 "__ultrix__"; the latter is only defined under GCC, but
2067 not by DEC's bundled CC. -JimB */
2068 else if (xerrno
== ENOMEM
)
2069 FD_ZERO (&Available
);
2072 /* This happens for no known reason on ALLIANT.
2073 I am guessing that this is the right response. -- RMS. */
2074 else if (xerrno
== EFAULT
)
2075 FD_ZERO (&Available
);
2077 else if (xerrno
== EBADF
)
2080 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
2081 the child's closure of the pts gives the parent a SIGHUP, and
2082 the ptc file descriptor is automatically closed,
2083 yielding EBADF here or at select() call above.
2084 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
2085 in m/ibmrt-aix.h), and here we just ignore the select error.
2086 Cleanup occurs c/o status_notify after SIGCLD. */
2087 FD_ZERO (&Available
); /* Cannot depend on values returned */
2093 error("select error: %s", strerror (xerrno
));
2095 #if defined(sun) && !defined(USG5_4)
2096 else if (nfds
> 0 && keyboard_bit_set (&Available
)
2098 /* System sometimes fails to deliver SIGIO.
2100 David J. Mackenzie says that Emacs doesn't compile under
2101 Solaris if this code is enabled, thus the USG5_4 in the CPP
2102 conditional. "I haven't noticed any ill effects so far.
2103 If you find a Solaris expert somewhere, they might know
2105 kill (getpid (), SIGIO
);
2108 /* Check for keyboard input */
2109 /* If there is any, return immediately
2110 to give it higher priority than subprocesses */
2112 /* We used to do this if wait_for_cell,
2113 but that caused infinite recursion in selection request events. */
2114 if ((XINT (read_kbd
) || wait_for_cell
)
2115 && detect_input_pending ())
2118 if (detect_input_pending ())
2122 /* Exit now if the cell we're waiting for became non-nil. */
2123 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2127 /* If we think we have keyboard input waiting, but didn't get SIGIO
2128 go read it. This can happen with X on BSD after logging out.
2129 In that case, there really is no input and no SIGIO,
2130 but select says there is input. */
2132 if (XINT (read_kbd
) && interrupt_input
2133 && (keyboard_bit_set (&Available
)))
2138 got_some_input
|= nfds
> 0;
2140 /* If checking input just got us a size-change event from X,
2141 obey it now if we should. */
2142 if (XINT (read_kbd
) || wait_for_cell
)
2143 do_pending_window_change ();
2145 /* Check for data from a process. */
2146 /* Really FIRST_PROC_DESC should be 0 on Unix,
2147 but this is safer in the short run. */
2148 for (channel
= 0; channel
<= max_process_desc
; channel
++)
2150 if (FD_ISSET (channel
, &Available
)
2151 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
2155 /* If waiting for this channel, arrange to return as
2156 soon as no more input to be processed. No more
2158 if (wait_channel
== channel
)
2164 proc
= chan_process
[channel
];
2168 /* Read data from the process, starting with our
2169 buffered-ahead character if we have one. */
2171 nread
= read_process_output (proc
, channel
);
2174 /* Since read_process_output can run a filter,
2175 which can call accept-process-output,
2176 don't try to read from any other processes
2177 before doing the select again. */
2178 FD_ZERO (&Available
);
2181 redisplay_preserve_echo_area ();
2184 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2188 else if (nread
== -1 && errno
== EAGAIN
)
2192 else if (nread
== -1 && errno
== EAGAIN
)
2194 /* Note that we cannot distinguish between no input
2195 available now and a closed pipe.
2196 With luck, a closed pipe will be accompanied by
2197 subprocess termination and SIGCHLD. */
2198 else if (nread
== 0 && !NETCONN_P (proc
))
2200 #endif /* O_NDELAY */
2201 #endif /* O_NONBLOCK */
2202 #endif /* EWOULDBLOCK */
2204 /* On some OSs with ptys, when the process on one end of
2205 a pty exits, the other end gets an error reading with
2206 errno = EIO instead of getting an EOF (0 bytes read).
2207 Therefore, if we get an error reading and errno =
2208 EIO, just continue, because the child process has
2209 exited and should clean itself up soon (e.g. when we
2211 else if (nread
== -1 && errno
== EIO
)
2213 #endif /* HAVE_PTYS */
2214 /* If we can detect process termination, don't consider the process
2215 gone just because its pipe is closed. */
2217 else if (nread
== 0 && !NETCONN_P (proc
))
2222 /* Preserve status of processes already terminated. */
2223 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2224 deactivate_process (proc
);
2225 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2226 update_status (XPROCESS (proc
));
2227 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2228 XPROCESS (proc
)->status
2229 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2232 } /* end for each file descriptor */
2233 } /* end while exit conditions not met */
2235 waiting_for_user_input_p
= 0;
2237 /* If calling from keyboard input, do not quit
2238 since we want to return C-g as an input character.
2239 Otherwise, do pending quit if requested. */
2240 if (XINT (read_kbd
) >= 0)
2242 /* Prevent input_pending from remaining set if we quit. */
2243 clear_input_pending ();
2247 return got_some_input
;
2250 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
2253 read_process_output_call (fun_and_args
)
2254 Lisp_Object fun_and_args
;
2256 return apply1 (XCONS (fun_and_args
)->car
, XCONS (fun_and_args
)->cdr
);
2260 read_process_output_error_handler (error
)
2263 cmd_error_internal (error
, "error in process filter: ");
2265 update_echo_area ();
2266 Fsleep_for (make_number (2), Qnil
);
2269 /* Read pending output from the process channel,
2270 starting with our buffered-ahead character if we have one.
2271 Yield number of characters read.
2273 This function reads at most 1024 characters.
2274 If you want to read all available subprocess output,
2275 you must call it repeatedly until it returns zero. */
2277 read_process_output (proc
, channel
)
2279 register int channel
;
2281 register int nchars
;
2287 register Lisp_Object outstream
;
2288 register struct buffer
*old
= current_buffer
;
2289 register struct Lisp_Process
*p
= XPROCESS (proc
);
2290 register int opoint
;
2293 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2295 vs
= get_vms_process_pointer (p
->pid
);
2299 return(0); /* Really weird if it does this */
2300 if (!(vs
->iosb
[0] & 1))
2301 return -1; /* I/O error */
2304 error ("Could not get VMS process pointer");
2305 chars
= vs
->inputBuffer
;
2306 nchars
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2309 start_vms_process_read (vs
); /* Crank up the next read on the process */
2310 return 1; /* Nothing worth printing, say we got 1 */
2314 if (proc_buffered_char
[channel
] < 0)
2316 nchars
= read_child_output (channel
, chars
, sizeof (chars
));
2318 nchars
= read (channel
, chars
, sizeof chars
);
2322 chars
[0] = proc_buffered_char
[channel
];
2323 proc_buffered_char
[channel
] = -1;
2325 nchars
= read_child_output (channel
, chars
+ 1, sizeof (chars
) - 1);
2327 nchars
= read (channel
, chars
+ 1, sizeof chars
- 1);
2332 nchars
= nchars
+ 1;
2334 #endif /* not VMS */
2336 if (nchars
<= 0) return nchars
;
2338 outstream
= p
->filter
;
2339 if (!NILP (outstream
))
2341 /* We inhibit quit here instead of just catching it so that
2342 hitting ^G when a filter happens to be running won't screw
2344 int count
= specpdl_ptr
- specpdl
;
2345 Lisp_Object odeactivate
;
2346 Lisp_Object obuffer
, okeymap
;
2348 /* No need to gcpro these, because all we do with them later
2349 is test them for EQness, and none of them should be a string. */
2350 odeactivate
= Vdeactivate_mark
;
2351 XSETBUFFER (obuffer
, current_buffer
);
2352 okeymap
= current_buffer
->keymap
;
2354 specbind (Qinhibit_quit
, Qt
);
2355 specbind (Qlast_nonmenu_event
, Qt
);
2357 running_asynch_code
= 1;
2358 internal_condition_case_1 (read_process_output_call
,
2361 Fcons (make_string (chars
,
2364 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
2365 read_process_output_error_handler
);
2366 running_asynch_code
= 0;
2367 restore_match_data ();
2369 /* Handling the process output should not deactivate the mark. */
2370 Vdeactivate_mark
= odeactivate
;
2372 if (! EQ (Fcurrent_buffer (), obuffer
)
2373 || ! EQ (current_buffer
->keymap
, okeymap
))
2374 record_asynch_buffer_change ();
2376 if (waiting_for_user_input_p
)
2377 prepare_menu_bars ();
2380 start_vms_process_read (vs
);
2382 unbind_to (count
, Qnil
);
2386 /* If no filter, write into buffer if it isn't dead. */
2387 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2389 Lisp_Object old_read_only
;
2390 Lisp_Object old_begv
, old_zv
;
2391 Lisp_Object odeactivate
;
2393 odeactivate
= Vdeactivate_mark
;
2395 Fset_buffer (p
->buffer
);
2397 old_read_only
= current_buffer
->read_only
;
2398 XSETFASTINT (old_begv
, BEGV
);
2399 XSETFASTINT (old_zv
, ZV
);
2401 current_buffer
->read_only
= Qnil
;
2403 /* Insert new output into buffer
2404 at the current end-of-output marker,
2405 thus preserving logical ordering of input and output. */
2406 if (XMARKER (p
->mark
)->buffer
)
2407 SET_PT (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
));
2411 /* If the output marker is outside of the visible region, save
2412 the restriction and widen. */
2413 if (! (BEGV
<= point
&& point
<= ZV
))
2416 /* Make sure opoint floats ahead of any new text, just as point
2418 if (point
<= opoint
)
2421 /* Insert after old_begv, but before old_zv. */
2422 if (point
< XFASTINT (old_begv
))
2423 XSETFASTINT (old_begv
, XFASTINT (old_begv
) + nchars
);
2424 if (point
<= XFASTINT (old_zv
))
2425 XSETFASTINT (old_zv
, XFASTINT (old_zv
) + nchars
);
2427 /* Insert before markers in case we are inserting where
2428 the buffer's mark is, and the user's next command is Meta-y. */
2429 insert_before_markers (chars
, nchars
);
2430 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
2432 update_mode_lines
++;
2434 /* If the restriction isn't what it should be, set it. */
2435 if (XFASTINT (old_begv
) != BEGV
|| XFASTINT (old_zv
) != ZV
)
2436 Fnarrow_to_region (old_begv
, old_zv
);
2438 /* Handling the process output should not deactivate the mark. */
2439 Vdeactivate_mark
= odeactivate
;
2441 current_buffer
->read_only
= old_read_only
;
2443 set_buffer_internal (old
);
2446 start_vms_process_read (vs
);
2451 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
2453 "Returns non-nil if emacs is waiting for input from the user.\n\
2454 This is intended for use by asynchronous process output filters and sentinels.")
2457 return (waiting_for_user_input_p
? Qt
: Qnil
);
2460 /* Sending data to subprocess */
2462 jmp_buf send_process_frame
;
2465 send_process_trap ()
2471 longjmp (send_process_frame
, 1);
2474 /* Send some data to process PROC.
2475 BUF is the beginning of the data; LEN is the number of characters.
2476 OBJECT is the Lisp object that the data comes from. */
2478 send_process (proc
, buf
, len
, object
)
2484 /* Don't use register vars; longjmp can lose them. */
2486 unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
2489 struct Lisp_Process
*p
= XPROCESS (proc
);
2490 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2493 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2494 update_status (XPROCESS (proc
));
2495 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2496 error ("Process %s not running", procname
);
2499 vs
= get_vms_process_pointer (p
->pid
);
2501 error ("Could not find this process: %x", p
->pid
);
2502 else if (write_to_vms_process (vs
, buf
, len
))
2506 if (pty_max_bytes
== 0)
2508 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
2509 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
2511 if (pty_max_bytes
< 0)
2512 pty_max_bytes
= 250;
2514 pty_max_bytes
= 250;
2516 /* Deduct one, to leave space for the eof. */
2520 if (!setjmp (send_process_frame
))
2524 SIGTYPE (*old_sigpipe
)();
2527 /* Decide how much data we can send in one batch.
2528 Long lines need to be split into multiple batches. */
2529 if (!NILP (XPROCESS (proc
)->pty_flag
))
2531 /* Starting this at zero is always correct when not the first iteration
2532 because the previous iteration ended by sending C-d.
2533 It may not be correct for the first iteration
2534 if a partial line was sent in a separate send_process call.
2535 If that proves worth handling, we need to save linepos
2536 in the process object. */
2539 char *end
= buf
+ len
;
2541 /* Scan through this text for a line that is too long. */
2542 while (ptr
!= end
&& linepos
< pty_max_bytes
)
2550 /* If we found one, break the line there
2551 and put in a C-d to force the buffer through. */
2555 /* Send this batch, using one or more write calls. */
2558 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
2559 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
2560 signal (SIGPIPE
, old_sigpipe
);
2566 || errno
== EWOULDBLOCK
2572 /* Buffer is full. Wait, accepting input;
2573 that may allow the program
2574 to finish doing output and read more. */
2579 /* Running filters might relocate buffers or strings.
2580 Arrange to relocate BUF. */
2581 if (BUFFERP (object
))
2582 offset
= BUF_PTR_CHAR_POS (XBUFFER (object
),
2583 (unsigned char *) buf
);
2584 else if (STRINGP (object
))
2585 offset
= buf
- (char *) XSTRING (object
)->data
;
2587 XSETFASTINT (zero
, 0);
2588 wait_reading_process_input (1, 0, zero
, 0);
2590 if (BUFFERP (object
))
2591 buf
= (char *) BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
2592 else if (STRINGP (object
))
2593 buf
= offset
+ (char *) XSTRING (object
)->data
;
2598 /* This is a real error. */
2599 report_file_error ("writing to process", Fcons (proc
, Qnil
));
2606 /* If we sent just part of the string, put in an EOF
2607 to force it through, before we send the rest. */
2609 Fprocess_send_eof (proc
);
2614 XPROCESS (proc
)->raw_status_low
= Qnil
;
2615 XPROCESS (proc
)->raw_status_high
= Qnil
;
2616 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2617 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2618 deactivate_process (proc
);
2620 error ("Error writing to process %s; closed it", procname
);
2622 error ("SIGPIPE raised on process %s; closed it", procname
);
2627 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
2629 "Send current contents of region as input to PROCESS.\n\
2630 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2631 nil, indicating the current buffer's process.\n\
2632 Called from program, takes three arguments, PROCESS, START and END.\n\
2633 If the region is more than 500 characters long,\n\
2634 it is sent in several bunches. This may happen even for shorter regions.\n\
2635 Output from processes can arrive in between bunches.")
2636 (process
, start
, end
)
2637 Lisp_Object process
, start
, end
;
2642 proc
= get_process (process
);
2643 validate_region (&start
, &end
);
2645 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
2648 start1
= XINT (start
);
2649 send_process (proc
, &FETCH_CHAR (start1
), XINT (end
) - XINT (start
),
2650 Fcurrent_buffer ());
2655 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
2657 "Send PROCESS the contents of STRING as input.\n\
2658 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2659 nil, indicating the current buffer's process.\n\
2660 If STRING is more than 500 characters long,\n\
2661 it is sent in several bunches. This may happen even for shorter strings.\n\
2662 Output from processes can arrive in between bunches.")
2664 Lisp_Object process
, string
;
2667 CHECK_STRING (string
, 1);
2668 proc
= get_process (process
);
2669 send_process (proc
, XSTRING (string
)->data
, XSTRING (string
)->size
, string
);
2673 /* send a signal number SIGNO to PROCESS.
2674 CURRENT_GROUP means send to the process group that currently owns
2675 the terminal being used to communicate with PROCESS.
2676 This is used for various commands in shell mode.
2677 If NOMSG is zero, insert signal-announcements into process's buffers
2680 If we can, we try to signal PROCESS by sending control characters
2681 down the pty. This allows us to signal inferiors who have changed
2682 their uid, for which killpg would return an EPERM error. */
2685 process_send_signal (process
, signo
, current_group
, nomsg
)
2686 Lisp_Object process
;
2688 Lisp_Object current_group
;
2692 register struct Lisp_Process
*p
;
2696 proc
= get_process (process
);
2697 p
= XPROCESS (proc
);
2699 if (!EQ (p
->childp
, Qt
))
2700 error ("Process %s is not a subprocess",
2701 XSTRING (p
->name
)->data
);
2702 if (XINT (p
->infd
) < 0)
2703 error ("Process %s is not active",
2704 XSTRING (p
->name
)->data
);
2706 if (NILP (p
->pty_flag
))
2707 current_group
= Qnil
;
2709 /* If we are using pgrps, get a pgrp number and make it negative. */
2710 if (!NILP (current_group
))
2712 #ifdef SIGNALS_VIA_CHARACTERS
2713 /* If possible, send signals to the entire pgrp
2714 by sending an input character to it. */
2716 /* TERMIOS is the latest and bestest, and seems most likely to
2717 work. If the system has it, use it. */
2724 tcgetattr (XINT (p
->infd
), &t
);
2725 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2729 tcgetattr (XINT (p
->infd
), &t
);
2730 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2734 tcgetattr (XINT (p
->infd
), &t
);
2735 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
2736 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2738 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
2743 #else /* ! HAVE_TERMIOS */
2745 /* On Berkeley descendants, the following IOCTL's retrieve the
2746 current control characters. */
2747 #if defined (TIOCGLTC) && defined (TIOCGETC)
2755 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2756 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
2759 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2760 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
2764 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
2765 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
2767 #endif /* ! defined (SIGTSTP) */
2770 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2772 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
2779 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2780 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2783 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2784 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2788 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2789 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2791 #endif /* ! defined (SIGTSTP) */
2793 #else /* ! defined (TCGETA) */
2794 Your configuration files are messed up
.
2795 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
2796 you'd better be using one of the alternatives above! */
2797 #endif /* ! defined (TCGETA) */
2798 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2799 #endif /* ! defined HAVE_TERMIOS */
2800 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
2803 /* Get the pgrp using the tty itself, if we have that.
2804 Otherwise, use the pty to get the pgrp.
2805 On pfa systems, saka@pfu.fujitsu.co.JP writes:
2806 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
2807 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
2808 His patch indicates that if TIOCGPGRP returns an error, then
2809 we should just assume that p->pid is also the process group id. */
2813 if (!NILP (p
->subtty
))
2814 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
2816 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
2820 gid
= - XFASTINT (p
->pid
);
2821 #endif /* ! defined (pfa) */
2827 #else /* ! defined (TIOCGPGRP ) */
2828 /* Can't select pgrps on this system, so we know that
2829 the child itself heads the pgrp. */
2830 gid
= - XFASTINT (p
->pid
);
2831 #endif /* ! defined (TIOCGPGRP ) */
2834 gid
= - XFASTINT (p
->pid
);
2840 p
->raw_status_low
= Qnil
;
2841 p
->raw_status_high
= Qnil
;
2843 XSETINT (p
->tick
, ++process_tick
);
2847 #endif /* ! defined (SIGCONT) */
2850 send_process (proc
, "\003", 1, Qnil
); /* ^C */
2855 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
2860 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
2863 flush_pending_output (XINT (p
->infd
));
2867 /* If we don't have process groups, send the signal to the immediate
2868 subprocess. That isn't really right, but it's better than any
2869 obvious alternative. */
2872 kill (XFASTINT (p
->pid
), signo
);
2876 /* gid may be a pid, or minus a pgrp's number */
2878 if (!NILP (current_group
))
2879 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
2882 gid
= - XFASTINT (p
->pid
);
2885 #else /* ! defined (TIOCSIGSEND) */
2886 EMACS_KILLPG (-gid
, signo
);
2887 #endif /* ! defined (TIOCSIGSEND) */
2890 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
2891 "Interrupt process PROCESS. May be process or name of one.\n\
2892 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
2893 nil or no arg means current buffer's process.\n\
2894 Second arg CURRENT-GROUP non-nil means send signal to\n\
2895 the current process-group of the process's controlling terminal\n\
2896 rather than to the process's own process group.\n\
2897 If the process is a shell, this means interrupt current subjob\n\
2898 rather than the shell.")
2899 (process
, current_group
)
2900 Lisp_Object process
, current_group
;
2902 process_send_signal (process
, SIGINT
, current_group
, 0);
2906 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
2907 "Kill process PROCESS. May be process or name of one.\n\
2908 See function `interrupt-process' for more details on usage.")
2909 (process
, current_group
)
2910 Lisp_Object process
, current_group
;
2912 process_send_signal (process
, SIGKILL
, current_group
, 0);
2916 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
2917 "Send QUIT signal to process PROCESS. May be process or name of one.\n\
2918 See function `interrupt-process' for more details on usage.")
2919 (process
, current_group
)
2920 Lisp_Object process
, current_group
;
2922 process_send_signal (process
, SIGQUIT
, current_group
, 0);
2926 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
2927 "Stop process PROCESS. May be process or name of one.\n\
2928 See function `interrupt-process' for more details on usage.")
2929 (process
, current_group
)
2930 Lisp_Object process
, current_group
;
2933 error ("no SIGTSTP support");
2935 process_send_signal (process
, SIGTSTP
, current_group
, 0);
2940 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
2941 "Continue process PROCESS. May be process or name of one.\n\
2942 See function `interrupt-process' for more details on usage.")
2943 (process
, current_group
)
2944 Lisp_Object process
, current_group
;
2947 process_send_signal (process
, SIGCONT
, current_group
, 0);
2949 error ("no SIGCONT support");
2954 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
2955 2, 2, "nProcess number: \nnSignal code: ",
2956 "Send the process with process id PID the signal with code SIGCODE.\n\
2957 PID must be an integer. The process need not be a child of this Emacs.\n\
2958 SIGCODE may be an integer, or a symbol whose name is a signal name.")
2960 Lisp_Object pid
, sigcode
;
2962 CHECK_NUMBER (pid
, 0);
2964 #define handle_signal(NAME, VALUE) \
2965 else if (!strcmp (name, NAME)) \
2966 XSETINT (sigcode, VALUE)
2968 if (INTEGERP (sigcode
))
2972 unsigned char *name
;
2974 CHECK_SYMBOL (sigcode
, 1);
2975 name
= XSYMBOL (sigcode
)->name
->data
;
2980 handle_signal ("SIGHUP", SIGHUP
);
2983 handle_signal ("SIGINT", SIGINT
);
2986 handle_signal ("SIGQUIT", SIGQUIT
);
2989 handle_signal ("SIGILL", SIGILL
);
2992 handle_signal ("SIGABRT", SIGABRT
);
2995 handle_signal ("SIGEMT", SIGEMT
);
2998 handle_signal ("SIGKILL", SIGKILL
);
3001 handle_signal ("SIGFPE", SIGFPE
);
3004 handle_signal ("SIGBUS", SIGBUS
);
3007 handle_signal ("SIGSEGV", SIGSEGV
);
3010 handle_signal ("SIGSYS", SIGSYS
);
3013 handle_signal ("SIGPIPE", SIGPIPE
);
3016 handle_signal ("SIGALRM", SIGALRM
);
3019 handle_signal ("SIGTERM", SIGTERM
);
3022 handle_signal ("SIGURG", SIGURG
);
3025 handle_signal ("SIGSTOP", SIGSTOP
);
3028 handle_signal ("SIGTSTP", SIGTSTP
);
3031 handle_signal ("SIGCONT", SIGCONT
);
3034 handle_signal ("SIGCHLD", SIGCHLD
);
3037 handle_signal ("SIGTTIN", SIGTTIN
);
3040 handle_signal ("SIGTTOU", SIGTTOU
);
3043 handle_signal ("SIGIO", SIGIO
);
3046 handle_signal ("SIGXCPU", SIGXCPU
);
3049 handle_signal ("SIGXFSZ", SIGXFSZ
);
3052 handle_signal ("SIGVTALRM", SIGVTALRM
);
3055 handle_signal ("SIGPROF", SIGPROF
);
3058 handle_signal ("SIGWINCH", SIGWINCH
);
3061 handle_signal ("SIGINFO", SIGINFO
);
3064 handle_signal ("SIGUSR1", SIGUSR1
);
3067 handle_signal ("SIGUSR2", SIGUSR2
);
3070 error ("Undefined signal name %s", name
);
3073 #undef handle_signal
3076 /* Only works for kill-type signals */
3077 return make_number (win32_kill_process (XINT (pid
), XINT (sigcode
)));
3079 return make_number (kill (XINT (pid
), XINT (sigcode
)));
3083 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
3084 "Make PROCESS see end-of-file in its input.\n\
3085 Eof comes after any text already sent to it.\n\
3086 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3087 nil, indicating the current buffer's process.\n\
3088 If PROCESS is a network connection, or is a process communicating\n\
3089 through a pipe (as opposed to a pty), then you cannot send any more\n\
3090 text to PROCESS after you call this function.")
3092 Lisp_Object process
;
3096 proc
= get_process (process
);
3098 /* Make sure the process is really alive. */
3099 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3100 update_status (XPROCESS (proc
));
3101 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3102 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
3105 send_process (proc
, "\032", 1, Qnil
); /* ^z */
3107 if (!NILP (XPROCESS (proc
)->pty_flag
))
3108 send_process (proc
, "\004", 1, Qnil
);
3111 close (XINT (XPROCESS (proc
)->outfd
));
3112 XSETINT (XPROCESS (proc
)->outfd
, open (NULL_DEVICE
, O_WRONLY
));
3118 /* Kill all processes associated with `buffer'.
3119 If `buffer' is nil, kill all processes */
3121 kill_buffer_processes (buffer
)
3124 Lisp_Object tail
, proc
;
3126 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3128 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3129 if (GC_PROCESSP (proc
)
3130 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
3132 if (NETCONN_P (proc
))
3133 Fdelete_process (proc
);
3134 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
3135 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
3140 /* On receipt of a signal that a child status has changed,
3141 loop asking about children with changed statuses until
3142 the system says there are no more.
3143 All we do is change the status;
3144 we do not run sentinels or print notifications.
3145 That is saved for the next time keyboard input is done,
3146 in order to avoid timing errors. */
3148 /** WARNING: this can be called during garbage collection.
3149 Therefore, it must not be fooled by the presence of mark bits in
3152 /** USG WARNING: Although it is not obvious from the documentation
3153 in signal(2), on a USG system the SIGCLD handler MUST NOT call
3154 signal() before executing at least one wait(), otherwise the handler
3155 will be called again, resulting in an infinite loop. The relevant
3156 portion of the documentation reads "SIGCLD signals will be queued
3157 and the signal-catching function will be continually reentered until
3158 the queue is empty". Invoking signal() causes the kernel to reexamine
3159 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
3162 sigchld_handler (signo
)
3165 int old_errno
= errno
;
3167 register struct Lisp_Process
*p
;
3168 extern EMACS_TIME
*input_available_clear_time
;
3172 sigheld
|= sigbit (SIGCHLD
);
3184 #endif /* no WUNTRACED */
3185 /* Keep trying to get a status until we get a definitive result. */
3189 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
3191 while (pid
<= 0 && errno
== EINTR
);
3195 /* A real failure. We have done all our job, so return. */
3197 /* USG systems forget handlers when they are used;
3198 must reestablish each time */
3200 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
3203 sigheld
&= ~sigbit (SIGCHLD
);
3211 #endif /* no WNOHANG */
3213 /* Find the process that signaled us, and record its status. */
3216 for (tail
= Vprocess_alist
; XSYMBOL (tail
) != XSYMBOL (Qnil
); tail
= XCONS (tail
)->cdr
)
3218 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3219 p
= XPROCESS (proc
);
3220 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
3225 /* Look for an asynchronous process whose pid hasn't been filled
3228 for (tail
= Vprocess_alist
; XSYMBOL (tail
) != XSYMBOL (Qnil
); tail
= XCONS (tail
)->cdr
)
3230 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3231 p
= XPROCESS (proc
);
3232 if (INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
3237 /* Change the status of the process that was found. */
3240 union { int i
; WAITTYPE wt
; } u
;
3241 int clear_desc_flag
= 0;
3243 XSETINT (p
->tick
, ++process_tick
);
3245 XSETFASTINT (p
->raw_status_low
, u
.i
& 0xffff);
3246 XSETFASTINT (p
->raw_status_high
, u
.i
>> 16);
3248 /* If process has terminated, stop waiting for its output. */
3249 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
3250 && XINT (p
->infd
) >= 0)
3251 clear_desc_flag
= 1;
3253 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
3254 if (clear_desc_flag
)
3256 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
3257 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
3260 /* Tell wait_reading_process_input that it needs to wake up and
3262 if (input_available_clear_time
)
3263 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3266 /* There was no asynchronous process found for that id. Check
3267 if we have a synchronous process. */
3270 synch_process_alive
= 0;
3272 /* Report the status of the synchronous process. */
3274 synch_process_retcode
= WRETCODE (w
);
3275 else if (WIFSIGNALED (w
))
3277 int code
= WTERMSIG (w
);
3283 /* Suppress warning if the table has const char *. */
3284 signame
= (char *) sys_siglist
[code
];
3286 signame
= sys_errlist
[code
];
3290 signame
= "unknown";
3292 synch_process_death
= signame
;
3295 /* Tell wait_reading_process_input that it needs to wake up and
3297 if (input_available_clear_time
)
3298 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3301 /* On some systems, we must return right away.
3302 If any more processes want to signal us, we will
3304 Otherwise (on systems that have WNOHANG), loop around
3305 to use up all the processes that have something to tell us. */
3306 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT)
3308 signal (signo
, sigchld_handler
);
3312 #endif /* USG, but not HPUX with WNOHANG */
3318 exec_sentinel_unwind (data
)
3321 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
3326 exec_sentinel_error_handler (error
)
3329 cmd_error_internal (error
, "error in process sentinel: ");
3331 update_echo_area ();
3332 Fsleep_for (make_number (2), Qnil
);
3336 exec_sentinel (proc
, reason
)
3337 Lisp_Object proc
, reason
;
3339 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
3340 register struct Lisp_Process
*p
= XPROCESS (proc
);
3341 int count
= specpdl_ptr
- specpdl
;
3343 /* No need to gcpro these, because all we do with them later
3344 is test them for EQness, and none of them should be a string. */
3345 odeactivate
= Vdeactivate_mark
;
3346 XSETBUFFER (obuffer
, current_buffer
);
3347 okeymap
= current_buffer
->keymap
;
3349 sentinel
= p
->sentinel
;
3350 if (NILP (sentinel
))
3353 /* Zilch the sentinel while it's running, to avoid recursive invocations;
3354 assure that it gets restored no matter how the sentinel exits. */
3356 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
3357 /* Inhibit quit so that random quits don't screw up a running filter. */
3358 specbind (Qinhibit_quit
, Qt
);
3359 specbind (Qlast_nonmenu_event
, Qt
);
3361 running_asynch_code
= 1;
3362 internal_condition_case_1 (read_process_output_call
,
3364 Fcons (proc
, Fcons (reason
, Qnil
))),
3365 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
3366 exec_sentinel_error_handler
);
3367 running_asynch_code
= 0;
3368 restore_match_data ();
3370 Vdeactivate_mark
= odeactivate
;
3371 if (! EQ (Fcurrent_buffer (), obuffer
)
3372 || ! EQ (current_buffer
->keymap
, okeymap
))
3373 record_asynch_buffer_change ();
3375 if (waiting_for_user_input_p
)
3376 prepare_menu_bars ();
3377 unbind_to (count
, Qnil
);
3380 /* Report all recent events of a change in process status
3381 (either run the sentinel or output a message).
3382 This is done while Emacs is waiting for keyboard input. */
3386 register Lisp_Object proc
, buffer
;
3387 Lisp_Object tail
, msg
;
3388 struct gcpro gcpro1
, gcpro2
;
3392 /* We need to gcpro tail; if read_process_output calls a filter
3393 which deletes a process and removes the cons to which tail points
3394 from Vprocess_alist, and then causes a GC, tail is an unprotected
3398 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
3401 register struct Lisp_Process
*p
;
3403 proc
= Fcdr (Fcar (tail
));
3404 p
= XPROCESS (proc
);
3406 if (XINT (p
->tick
) != XINT (p
->update_tick
))
3408 XSETINT (p
->update_tick
, XINT (p
->tick
));
3410 /* If process is still active, read any output that remains. */
3411 if (XINT (p
->infd
) >= 0)
3412 while (! EQ (p
->filter
, Qt
)
3413 && read_process_output (proc
, XINT (p
->infd
)) > 0);
3417 /* Get the text to use for the message. */
3418 if (!NILP (p
->raw_status_low
))
3420 msg
= status_message (p
->status
);
3422 /* If process is terminated, deactivate it or delete it. */
3424 if (CONSP (p
->status
))
3425 symbol
= XCONS (p
->status
)->car
;
3427 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
3428 || EQ (symbol
, Qclosed
))
3430 if (delete_exited_processes
)
3431 remove_process (proc
);
3433 deactivate_process (proc
);
3436 /* Now output the message suitably. */
3437 if (!NILP (p
->sentinel
))
3438 exec_sentinel (proc
, msg
);
3439 /* Don't bother with a message in the buffer
3440 when a process becomes runnable. */
3441 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
3443 Lisp_Object ro
, tem
;
3444 struct buffer
*old
= current_buffer
;
3447 ro
= XBUFFER (buffer
)->read_only
;
3449 /* Avoid error if buffer is deleted
3450 (probably that's why the process is dead, too) */
3451 if (NILP (XBUFFER (buffer
)->name
))
3453 Fset_buffer (buffer
);
3455 /* Insert new output into buffer
3456 at the current end-of-output marker,
3457 thus preserving logical ordering of input and output. */
3458 if (XMARKER (p
->mark
)->buffer
)
3459 SET_PT (marker_position (p
->mark
));
3462 if (point
<= opoint
)
3463 opoint
+= XSTRING (msg
)->size
+ XSTRING (p
->name
)->size
+ 10;
3465 tem
= current_buffer
->read_only
;
3466 current_buffer
->read_only
= Qnil
;
3467 insert_string ("\nProcess ");
3468 Finsert (1, &p
->name
);
3469 insert_string (" ");
3471 current_buffer
->read_only
= tem
;
3472 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
3475 set_buffer_internal (old
);
3480 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
3481 redisplay_preserve_echo_area ();
3483 update_tick
= process_tick
;
3488 /* The first time this is called, assume keyboard input comes from DESC
3489 instead of from where we used to expect it.
3490 Subsequent calls mean assume input keyboard can come from DESC
3491 in addition to other places. */
3493 static int add_keyboard_wait_descriptor_called_flag
;
3496 add_keyboard_wait_descriptor (desc
)
3499 if (! add_keyboard_wait_descriptor_called_flag
)
3500 FD_CLR (0, &input_wait_mask
);
3501 add_keyboard_wait_descriptor_called_flag
= 1;
3502 FD_SET (desc
, &input_wait_mask
);
3503 if (desc
> max_keyboard_desc
)
3504 max_keyboard_desc
= desc
;
3507 /* From now on, do not expect DESC to give keyboard input. */
3510 delete_keyboard_wait_descriptor (desc
)
3514 int lim
= max_keyboard_desc
;
3516 FD_CLR (desc
, &input_wait_mask
);
3518 if (desc
== max_keyboard_desc
)
3519 for (fd
= 0; fd
< lim
; fd
++)
3520 if (FD_ISSET (fd
, &input_wait_mask
)
3521 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3522 max_keyboard_desc
= fd
;
3525 /* Return nonzero if *MASK has a bit set
3526 that corresponds to one of the keyboard input descriptors. */
3529 keyboard_bit_set (mask
)
3534 for (fd
= 0; fd
< max_keyboard_desc
; fd
++)
3535 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
3536 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3548 if (! noninteractive
|| initialized
)
3550 signal (SIGCHLD
, sigchld_handler
);
3553 FD_ZERO (&input_wait_mask
);
3554 FD_ZERO (&non_keyboard_wait_mask
);
3555 max_process_desc
= 0;
3557 FD_SET (0, &input_wait_mask
);
3559 Vprocess_alist
= Qnil
;
3560 for (i
= 0; i
< MAXDESC
; i
++)
3562 chan_process
[i
] = Qnil
;
3563 proc_buffered_char
[i
] = -1;
3570 stream_process
= intern ("stream");
3572 Qprocessp
= intern ("processp");
3573 staticpro (&Qprocessp
);
3574 Qrun
= intern ("run");
3576 Qstop
= intern ("stop");
3578 Qsignal
= intern ("signal");
3579 staticpro (&Qsignal
);
3581 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
3584 Qexit = intern ("exit");
3585 staticpro (&Qexit); */
3587 Qopen
= intern ("open");
3589 Qclosed
= intern ("closed");
3590 staticpro (&Qclosed
);
3592 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
3593 staticpro (&Qlast_nonmenu_event
);
3595 staticpro (&Vprocess_alist
);
3597 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
3598 "*Non-nil means delete processes immediately when they exit.\n\
3599 nil means don't delete them until `list-processes' is run.");
3601 delete_exited_processes
= 1;
3603 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
3604 "Control type of device used to communicate with subprocesses.\n\
3605 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
3606 The value has no effect if the system has no ptys or if all ptys are busy:\n\
3607 then a pipe is used in any case.\n\
3608 The value takes effect when `start-process' is called.");
3609 Vprocess_connection_type
= Qt
;
3611 defsubr (&Sprocessp
);
3612 defsubr (&Sget_process
);
3613 defsubr (&Sget_buffer_process
);
3614 defsubr (&Sdelete_process
);
3615 defsubr (&Sprocess_status
);
3616 defsubr (&Sprocess_exit_status
);
3617 defsubr (&Sprocess_id
);
3618 defsubr (&Sprocess_name
);
3619 defsubr (&Sprocess_tty_name
);
3620 defsubr (&Sprocess_command
);
3621 defsubr (&Sset_process_buffer
);
3622 defsubr (&Sprocess_buffer
);
3623 defsubr (&Sprocess_mark
);
3624 defsubr (&Sset_process_filter
);
3625 defsubr (&Sprocess_filter
);
3626 defsubr (&Sset_process_sentinel
);
3627 defsubr (&Sset_process_window_size
);
3628 defsubr (&Sprocess_sentinel
);
3629 defsubr (&Sprocess_kill_without_query
);
3630 defsubr (&Slist_processes
);
3631 defsubr (&Sprocess_list
);
3632 defsubr (&Sstart_process
);
3634 defsubr (&Sopen_network_stream
);
3635 #endif /* HAVE_SOCKETS */
3636 defsubr (&Saccept_process_output
);
3637 defsubr (&Sprocess_send_region
);
3638 defsubr (&Sprocess_send_string
);
3639 defsubr (&Sinterrupt_process
);
3640 defsubr (&Skill_process
);
3641 defsubr (&Squit_process
);
3642 defsubr (&Sstop_process
);
3643 defsubr (&Scontinue_process
);
3644 defsubr (&Sprocess_send_eof
);
3645 defsubr (&Ssignal_process
);
3646 defsubr (&Swaiting_for_user_input_p
);
3647 /* defsubr (&Sprocess_connection); */
3651 #else /* not subprocesses */
3653 #include <sys/types.h>
3657 #include "systime.h"
3658 #include "termopts.h"
3660 extern int frame_garbaged
;
3663 /* As described above, except assuming that there are no subprocesses:
3665 Wait for timeout to elapse and/or keyboard input to be available.
3668 timeout in seconds, or
3669 zero for no limit, or
3670 -1 means gobble data immediately available but don't wait for any.
3672 read_kbd is a Lisp_Object:
3673 0 to ignore keyboard input, or
3674 1 to return when input is available, or
3675 -1 means caller will actually read the input, so don't throw to
3677 We know that read_kbd will never be a Lisp_Process, since
3678 `subprocesses' isn't defined.
3680 do_display != 0 means redisplay should be done to show subprocess
3681 output that arrives.
3683 Return true iff we received input from any process. */
3686 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
3687 int time_limit
, microsecs
;
3688 Lisp_Object read_kbd
;
3691 EMACS_TIME end_time
, timeout
, *timeout_p
;
3694 /* What does time_limit really mean? */
3695 if (time_limit
|| microsecs
)
3697 /* It's not infinite. */
3698 timeout_p
= &timeout
;
3700 if (time_limit
== -1)
3701 /* In fact, it's zero. */
3702 EMACS_SET_SECS_USECS (timeout
, 0, 0);
3704 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
3706 /* How far in the future is that? */
3707 EMACS_GET_TIME (end_time
);
3708 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
3711 /* It's infinite. */
3714 /* This must come before stop_polling. */
3715 prepare_menu_bars ();
3717 /* Turn off periodic alarms (in case they are in use)
3718 because the select emulator uses alarms. */
3725 waitchannels
= XINT (read_kbd
) ? 1 : 0;
3727 /* If calling from keyboard input, do not quit
3728 since we want to return C-g as an input character.
3729 Otherwise, do pending quit if requested. */
3730 if (XINT (read_kbd
) >= 0)
3735 EMACS_GET_TIME (*timeout_p
);
3736 EMACS_SUB_TIME (*timeout_p
, end_time
, *timeout_p
);
3737 if (EMACS_TIME_NEG_P (*timeout_p
))
3741 /* Cause C-g and alarm signals to take immediate action,
3742 and cause input available signals to zero out timeout. */
3743 if (XINT (read_kbd
) < 0)
3744 set_waiting_for_input (&timeout
);
3746 /* If a frame has been newly mapped and needs updating,
3747 reprocess its display stuff. */
3748 if (frame_garbaged
&& do_display
)
3749 redisplay_preserve_echo_area ();
3751 if (XINT (read_kbd
) && detect_input_pending ())
3754 nfds
= select (1, &waitchannels
, 0, 0, timeout_p
);
3756 /* Make C-g and alarm signals set flags again */
3757 clear_waiting_for_input ();
3759 /* If we woke up due to SIGWINCH, actually change size now. */
3760 do_pending_window_change ();
3764 /* If the system call was interrupted, then go around the
3770 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
3771 /* System sometimes fails to deliver SIGIO. */
3772 kill (getpid (), SIGIO
);
3775 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
3779 /* If we have timed out (nfds == 0) or found some input (nfds > 0),
3791 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
3792 /* Don't confuse make-docfile by having two doc strings for this function.
3793 make-docfile does not pay attention to #if, for good reason! */
3796 register Lisp_Object name
;
3801 /* Kill all processes associated with `buffer'.
3802 If `buffer' is nil, kill all processes.
3803 Since we have no subprocesses, this does nothing. */
3805 kill_buffer_processes (buffer
)
3816 defsubr (&Sget_buffer_process
);
3820 #endif /* not subprocesses */