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
;
1192 SIGTYPE (*sigchld
)();
1194 /* Use volatile to protect variables from being clobbered by longjmp. */
1195 volatile int forkin
, forkout
;
1196 volatile int pty_flag
= 0;
1197 extern char **environ
;
1199 inchannel
= outchannel
= -1;
1202 if (!NILP (Vprocess_connection_type
))
1203 outchannel
= inchannel
= allocate_pty ();
1208 /* On USG systems it does not work to open the pty's tty here
1209 and then close and reopen it in the child. */
1211 /* Don't let this terminal become our controlling terminal
1212 (in case we don't have one). */
1213 forkout
= forkin
= open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1215 forkout
= forkin
= open (pty_name
, O_RDWR
, 0);
1218 report_file_error ("Opening pty", Qnil
);
1220 forkin
= forkout
= -1;
1221 #endif /* not USG */
1225 #endif /* HAVE_PTYS */
1228 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1229 report_file_error ("Opening socketpair", Qnil
);
1230 outchannel
= inchannel
= sv
[0];
1231 forkout
= forkin
= sv
[1];
1233 #else /* not SKTPAIR */
1236 pipe_with_inherited_out (sv
);
1240 pipe_with_inherited_in (sv
);
1243 #else /* not WINDOWSNT */
1250 #endif /* not WINDOWSNT */
1252 #endif /* not SKTPAIR */
1255 /* Replaced by close_process_descs */
1256 set_exclusive_use (inchannel
);
1257 set_exclusive_use (outchannel
);
1260 /* Stride people say it's a mystery why this is needed
1261 as well as the O_NDELAY, but that it fails without this. */
1262 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1265 ioctl (inchannel
, FIONBIO
, &one
);
1270 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1273 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1277 /* Record this as an active process, with its channels.
1278 As a result, child_setup will close Emacs's side of the pipes. */
1279 chan_process
[inchannel
] = process
;
1280 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1281 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1282 /* Record the tty descriptor used in the subprocess. */
1284 XPROCESS (process
)->subtty
= Qnil
;
1286 XSETFASTINT (XPROCESS (process
)->subtty
, forkin
);
1287 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1288 XPROCESS (process
)->status
= Qrun
;
1290 /* Delay interrupts until we have a chance to store
1291 the new fork's pid in its process structure */
1295 #else /* not BSD4_1 */
1296 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1297 sigsetmask (sigmask (SIGCHLD
));
1298 #else /* ordinary USG */
1300 sigchld_deferred
= 0;
1301 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1303 #endif /* ordinary USG */
1304 #endif /* not BSD4_1 */
1305 #endif /* SIGCHLD */
1307 FD_SET (inchannel
, &input_wait_mask
);
1308 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1309 if (inchannel
> max_process_desc
)
1310 max_process_desc
= inchannel
;
1312 /* Until we store the proper pid, enable sigchld_handler
1313 to recognize an unknown pid as standing for this process.
1314 It is very important not to let this `marker' value stay
1315 in the table after this function has returned; if it does
1316 it might cause call-process to hang and subsequent asynchronous
1317 processes to get their return values scrambled. */
1318 XSETINT (XPROCESS (process
)->pid
, -1);
1321 /* child_setup must clobber environ on systems with true vfork.
1322 Protect it from permanent change. */
1323 char **save_environ
= environ
;
1328 #endif /* not WINDOWSNT */
1330 int xforkin
= forkin
;
1331 int xforkout
= forkout
;
1333 #if 0 /* This was probably a mistake--it duplicates code later on,
1334 but fails to handle all the cases. */
1335 /* Make sure SIGCHLD is not blocked in the child. */
1336 sigsetmask (SIGEMPTYMASK
);
1339 /* Make the pty be the controlling terminal of the process. */
1341 /* First, disconnect its current controlling terminal. */
1343 /* We tried doing setsid only if pty_flag, but it caused
1344 process_set_signal to fail on SGI when using a pipe. */
1346 /* Make the pty's terminal the controlling terminal. */
1350 /* We ignore the return value
1351 because faith@cs.unc.edu says that is necessary on Linux. */
1352 ioctl (xforkin
, TIOCSCTTY
, 0);
1355 #else /* not HAVE_SETSID */
1357 /* It's very important to call setpgrp here and no time
1358 afterwards. Otherwise, we lose our controlling tty which
1359 is set when we open the pty. */
1362 #endif /* not HAVE_SETSID */
1363 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1364 if (pty_flag
&& xforkin
>= 0)
1367 tcgetattr (xforkin
, &t
);
1369 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1370 write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1373 #if defined (NTTYDISC) && defined (TIOCSETD)
1374 if (pty_flag
&& xforkin
>= 0)
1376 /* Use new line discipline. */
1377 int ldisc
= NTTYDISC
;
1378 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1383 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1384 can do TIOCSPGRP only to the process's controlling tty. */
1387 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1388 I can't test it since I don't have 4.3. */
1389 int j
= open ("/dev/tty", O_RDWR
, 0);
1390 ioctl (j
, TIOCNOTTY
, 0);
1393 /* In order to get a controlling terminal on some versions
1394 of BSD, it is necessary to put the process in pgrp 0
1395 before it opens the terminal. */
1403 #endif /* TIOCNOTTY */
1405 #if !defined (RTU) && !defined (UNIPLUS)
1406 /*** There is a suggestion that this ought to be a
1407 conditional on TIOCSPGRP. */
1408 /* Now close the pty (if we had it open) and reopen it.
1409 This makes the pty the controlling terminal of the subprocess. */
1412 #ifdef SET_CHILD_PTY_PGRP
1413 int pgrp
= getpid ();
1416 /* I wonder if close (open (pty_name, ...)) would work? */
1419 xforkout
= xforkin
= open (pty_name
, O_RDWR
, 0);
1423 write (1, "Couldn't open the pty terminal ", 31);
1424 write (1, pty_name
, strlen (pty_name
));
1429 #ifdef SET_CHILD_PTY_PGRP
1430 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1431 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1434 #endif /* not UNIPLUS and not RTU */
1435 #ifdef SETUP_SLAVE_PTY
1440 #endif /* SETUP_SLAVE_PTY */
1442 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1443 Now reenable it in the child, so it will die when we want it to. */
1445 signal (SIGHUP
, SIG_DFL
);
1447 #endif /* HAVE_PTYS */
1452 #else /* not BSD4_1 */
1453 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1454 sigsetmask (SIGEMPTYMASK
);
1455 #else /* ordinary USG */
1457 signal (SIGCHLD
, sigchld
);
1459 #endif /* ordinary USG */
1460 #endif /* not BSD4_1 */
1461 #endif /* SIGCHLD */
1463 signal (SIGINT
, SIG_DFL
);
1464 signal (SIGQUIT
, SIG_DFL
);
1467 child_setup_tty (xforkout
);
1469 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1470 new_argv
, 1, current_dir
);
1471 #else /* not WINDOWSNT */
1472 child_setup (xforkin
, xforkout
, xforkout
,
1473 new_argv
, 1, current_dir
);
1474 #endif /* not WINDOWSNT */
1476 environ
= save_environ
;
1483 if (forkin
!= forkout
&& forkout
>= 0)
1485 report_file_error ("Doing vfork", Qnil
);
1488 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
1491 register_child (pid
, inchannel
);
1492 #endif /* WINDOWSNT */
1494 /* If the subfork execv fails, and it exits,
1495 this close hangs. I don't know why.
1496 So have an interrupt jar it loose. */
1498 signal (SIGALRM
, create_process_1
);
1500 XPROCESS (process
)->subtty
= Qnil
;
1505 if (forkin
!= forkout
&& forkout
>= 0)
1510 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1513 XPROCESS (process
)->tty_name
= Qnil
;
1518 #else /* not BSD4_1 */
1519 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1520 sigsetmask (SIGEMPTYMASK
);
1521 #else /* ordinary USG */
1523 signal (SIGCHLD
, sigchld
);
1524 /* Now really handle any of these signals
1525 that came in during this function. */
1526 if (sigchld_deferred
)
1527 kill (getpid (), SIGCHLD
);
1529 #endif /* ordinary USG */
1530 #endif /* not BSD4_1 */
1531 #endif /* SIGCHLD */
1533 #endif /* not VMS */
1537 /* open a TCP network connection to a given HOST/SERVICE. Treated
1538 exactly like a normal process when reading and writing. Only
1539 differences are in status display and process deletion. A network
1540 connection has no PID; you cannot signal it. All you can do is
1541 deactivate and close it via delete-process */
1543 DEFUN ("open-network-stream", Fopen_network_stream
, Sopen_network_stream
,
1545 "Open a TCP connection for a service to a host.\n\
1546 Returns a subprocess-object to represent the connection.\n\
1547 Input and output work as for subprocesses; `delete-process' closes it.\n\
1548 Args are NAME BUFFER HOST SERVICE.\n\
1549 NAME is name for process. It is modified if necessary to make it unique.\n\
1550 BUFFER is the buffer (or buffer-name) to associate with the process.\n\
1551 Process output goes at end of that buffer, unless you specify\n\
1552 an output stream or filter function to handle the output.\n\
1553 BUFFER may be also nil, meaning that this process is not associated\n\
1555 Third arg is name of the host to connect to, or its IP address.\n\
1556 Fourth arg SERVICE is name of the service desired, or an integer\n\
1557 specifying a port number to connect to.")
1558 (name
, buffer
, host
, service
)
1559 Lisp_Object name
, buffer
, host
, service
;
1563 struct sockaddr_in address
;
1564 struct servent
*svc_info
;
1565 struct hostent
*host_info_ptr
, host_info
;
1566 char *(addr_list
[2]);
1567 IN_ADDR numeric_addr
;
1571 struct hostent host_info_fixed
;
1572 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1574 int count
= specpdl_ptr
- specpdl
;
1576 GCPRO4 (name
, buffer
, host
, service
);
1577 CHECK_STRING (name
, 0);
1578 CHECK_STRING (host
, 0);
1579 if (INTEGERP (service
))
1580 port
= htons ((unsigned short) XINT (service
));
1583 CHECK_STRING (service
, 0);
1584 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
1586 error ("Unknown service \"%s\"", XSTRING (service
)->data
);
1587 port
= svc_info
->s_port
;
1596 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
1598 if (! (host_info_ptr
== 0 && h_errno
== TRY_AGAIN
))
1601 Fsleep_for (make_number (1), Qnil
);
1603 if (host_info_ptr
== 0)
1604 /* Attempt to interpret host as numeric inet address */
1606 numeric_addr
= inet_addr ((char *) XSTRING (host
)->data
);
1607 if (NUMERIC_ADDR_ERROR
)
1608 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
1610 host_info_ptr
= &host_info
;
1611 host_info
.h_name
= 0;
1612 host_info
.h_aliases
= 0;
1613 host_info
.h_addrtype
= AF_INET
;
1615 /* Older machines have only one address slot called h_addr.
1616 Newer machines have h_addr_list, but #define h_addr to
1617 be its first element. */
1618 host_info
.h_addr_list
= &(addr_list
[0]);
1620 host_info
.h_addr
= (char*)(&numeric_addr
);
1622 host_info
.h_length
= strlen (addr_list
[0]);
1625 bzero (&address
, sizeof address
);
1626 bcopy (host_info_ptr
->h_addr
, (char *) &address
.sin_addr
,
1627 host_info_ptr
->h_length
);
1628 address
.sin_family
= host_info_ptr
->h_addrtype
;
1629 address
.sin_port
= port
;
1631 s
= socket (host_info_ptr
->h_addrtype
, SOCK_STREAM
, 0);
1633 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1635 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
1636 when connect is interrupted. So let's not let it get interrupted.
1637 Note we do not turn off polling, because polling is only used
1638 when not interrupt_input, and thus not normally used on the systems
1639 which have this bug. On systems which use polling, there's no way
1640 to quit if polling is turned off. */
1641 if (interrupt_input
)
1644 /* Slow down polling to every ten seconds.
1645 Some kernels have a bug which causes retrying connect to fail
1647 #ifdef POLL_FOR_INPUT
1648 bind_polling_period (10);
1652 if (connect (s
, (struct sockaddr
*) &address
, sizeof address
) == -1
1653 && errno
!= EISCONN
)
1659 if (errno
== EADDRINUSE
&& retry
< 20)
1667 if (interrupt_input
)
1671 report_file_error ("connection failed",
1672 Fcons (host
, Fcons (name
, Qnil
)));
1675 #ifdef POLL_FOR_INPUT
1676 unbind_to (count
, Qnil
);
1679 if (interrupt_input
)
1683 s
= connect_server (0);
1685 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1686 send_command (s
, C_PORT
, 0, "%s:%d", XSTRING (host
)->data
, ntohs (port
));
1687 send_command (s
, C_DUMB
, 1, 0);
1693 report_file_error ("error duplicating socket", Fcons (name
, Qnil
));
1696 buffer
= Fget_buffer_create (buffer
);
1697 proc
= make_process (name
);
1699 chan_process
[inch
] = proc
;
1702 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
1705 fcntl (inch
, F_SETFL
, O_NDELAY
);
1709 XPROCESS (proc
)->childp
= host
;
1710 XPROCESS (proc
)->command_channel_p
= Qnil
;
1711 XPROCESS (proc
)->buffer
= buffer
;
1712 XPROCESS (proc
)->sentinel
= Qnil
;
1713 XPROCESS (proc
)->filter
= Qnil
;
1714 XPROCESS (proc
)->command
= Qnil
;
1715 XPROCESS (proc
)->pid
= Qnil
;
1716 XSETINT (XPROCESS (proc
)->infd
, s
);
1717 XSETINT (XPROCESS (proc
)->outfd
, outch
);
1718 XPROCESS (proc
)->status
= Qrun
;
1719 FD_SET (inch
, &input_wait_mask
);
1720 FD_SET (inch
, &non_keyboard_wait_mask
);
1721 if (inch
> max_process_desc
)
1722 max_process_desc
= inch
;
1727 #endif /* HAVE_SOCKETS */
1729 deactivate_process (proc
)
1732 register int inchannel
, outchannel
;
1733 register struct Lisp_Process
*p
= XPROCESS (proc
);
1735 inchannel
= XINT (p
->infd
);
1736 outchannel
= XINT (p
->outfd
);
1740 /* Beware SIGCHLD hereabouts. */
1741 flush_pending_output (inchannel
);
1744 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
1745 sys$
dassgn (outchannel
);
1746 vs
= get_vms_process_pointer (p
->pid
);
1748 give_back_vms_process_stuff (vs
);
1752 if (outchannel
>= 0 && outchannel
!= inchannel
)
1756 XSETINT (p
->infd
, -1);
1757 XSETINT (p
->outfd
, -1);
1758 chan_process
[inchannel
] = Qnil
;
1759 FD_CLR (inchannel
, &input_wait_mask
);
1760 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
1761 if (inchannel
== max_process_desc
)
1764 /* We just closed the highest-numbered process input descriptor,
1765 so recompute the highest-numbered one now. */
1766 max_process_desc
= 0;
1767 for (i
= 0; i
< MAXDESC
; i
++)
1768 if (!NILP (chan_process
[i
]))
1769 max_process_desc
= i
;
1774 /* Close all descriptors currently in use for communication
1775 with subprocess. This is used in a newly-forked subprocess
1776 to get rid of irrelevant descriptors. */
1778 close_process_descs ()
1782 for (i
= 0; i
< MAXDESC
; i
++)
1784 Lisp_Object process
;
1785 process
= chan_process
[i
];
1786 if (!NILP (process
))
1788 int in
= XINT (XPROCESS (process
)->infd
);
1789 int out
= XINT (XPROCESS (process
)->outfd
);
1792 if (out
>= 0 && in
!= out
)
1799 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
1801 "Allow any pending output from subprocesses to be read by Emacs.\n\
1802 It is read into the process' buffers or given to their filter functions.\n\
1803 Non-nil arg PROCESS means do not return until some output has been received\n\
1805 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
1806 seconds and microseconds to wait; return after that much time whether\n\
1807 or not there is input.\n\
1808 Return non-nil iff we received any output before the timeout expired.")
1809 (proc
, timeout
, timeout_msecs
)
1810 register Lisp_Object proc
, timeout
, timeout_msecs
;
1815 if (! NILP (timeout_msecs
))
1817 CHECK_NUMBER (timeout_msecs
, 2);
1818 useconds
= XINT (timeout_msecs
);
1819 if (!INTEGERP (timeout
))
1820 XSETINT (timeout
, 0);
1823 int carry
= useconds
/ 1000000;
1825 XSETINT (timeout
, XINT (timeout
) + carry
);
1826 useconds
-= carry
* 1000000;
1828 /* I think this clause is necessary because C doesn't
1829 guarantee a particular rounding direction for negative
1833 XSETINT (timeout
, XINT (timeout
) - 1);
1834 useconds
+= 1000000;
1841 if (! NILP (timeout
))
1843 CHECK_NUMBER (timeout
, 1);
1844 seconds
= XINT (timeout
);
1857 XSETFASTINT (proc
, 0);
1860 (wait_reading_process_input (seconds
, useconds
, proc
, 0)
1864 /* This variable is different from waiting_for_input in keyboard.c.
1865 It is used to communicate to a lisp process-filter/sentinel (via the
1866 function Fwaiting_for_user_input_p below) whether emacs was waiting
1867 for user-input when that process-filter was called.
1868 waiting_for_input cannot be used as that is by definition 0 when
1869 lisp code is being evalled.
1870 This is also used in record_asynch_buffer_change.
1871 For that purpose, this must be 0
1872 when not inside wait_reading_process_input. */
1873 static int waiting_for_user_input_p
;
1875 /* Read and dispose of subprocess output while waiting for timeout to
1876 elapse and/or keyboard input to be available.
1879 timeout in seconds, or
1880 zero for no limit, or
1881 -1 means gobble data immediately available but don't wait for any.
1884 an additional duration to wait, measured in microseconds.
1885 If this is nonzero and time_limit is 0, then the timeout
1886 consists of MICROSECS only.
1888 READ_KBD is a lisp value:
1889 0 to ignore keyboard input, or
1890 1 to return when input is available, or
1891 -1 meaning caller will actually read the input, so don't throw to
1892 the quit handler, or
1893 a cons cell, meaning wait until its car is non-nil
1894 (and gobble terminal input into the buffer if any arrives), or
1895 a process object, meaning wait until something arrives from that
1896 process. The return value is true iff we read some input from
1899 DO_DISPLAY != 0 means redisplay should be done to show subprocess
1900 output that arrives.
1902 If READ_KBD is a pointer to a struct Lisp_Process, then the
1903 function returns true iff we received input from that process
1904 before the timeout elapsed.
1905 Otherwise, return true iff we received input from any process. */
1907 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
1908 int time_limit
, microsecs
;
1909 Lisp_Object read_kbd
;
1912 register int channel
, nfds
, m
;
1913 static SELECT_TYPE Available
;
1916 EMACS_TIME timeout
, end_time
, garbage
;
1918 int wait_channel
= -1;
1919 struct Lisp_Process
*wait_proc
= 0;
1920 int got_some_input
= 0;
1921 Lisp_Object
*wait_for_cell
= 0;
1923 FD_ZERO (&Available
);
1925 /* If read_kbd is a process to watch, set wait_proc and wait_channel
1927 if (PROCESSP (read_kbd
))
1929 wait_proc
= XPROCESS (read_kbd
);
1930 wait_channel
= XINT (wait_proc
->infd
);
1931 XSETFASTINT (read_kbd
, 0);
1934 /* If waiting for non-nil in a cell, record where. */
1935 if (CONSP (read_kbd
))
1937 wait_for_cell
= &XCONS (read_kbd
)->car
;
1938 XSETFASTINT (read_kbd
, 0);
1941 waiting_for_user_input_p
= XINT (read_kbd
);
1943 /* Since we may need to wait several times,
1944 compute the absolute time to return at. */
1945 if (time_limit
|| microsecs
)
1947 EMACS_GET_TIME (end_time
);
1948 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
1949 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
1954 /* If calling from keyboard input, do not quit
1955 since we want to return C-g as an input character.
1956 Otherwise, do pending quit if requested. */
1957 if (XINT (read_kbd
) >= 0)
1960 /* Exit now if the cell we're waiting for became non-nil. */
1961 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
1964 /* Compute time from now till when time limit is up */
1965 /* Exit if already run out */
1966 if (time_limit
== -1)
1968 /* -1 specified for timeout means
1969 gobble output available now
1970 but don't wait at all. */
1972 EMACS_SET_SECS_USECS (timeout
, 0, 0);
1974 else if (time_limit
|| microsecs
)
1976 EMACS_GET_TIME (timeout
);
1977 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
1978 if (EMACS_TIME_NEG_P (timeout
))
1983 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
1986 /* Cause C-g and alarm signals to take immediate action,
1987 and cause input available signals to zero out timeout.
1989 It is important that we do this before checking for process
1990 activity. If we get a SIGCHLD after the explicit checks for
1991 process activity, timeout is the only way we will know. */
1992 if (XINT (read_kbd
) < 0)
1993 set_waiting_for_input (&timeout
);
1995 /* If status of something has changed, and no input is
1996 available, notify the user of the change right away. After
1997 this explicit check, we'll let the SIGCHLD handler zap
1998 timeout to get our attention. */
1999 if (update_tick
!= process_tick
&& do_display
)
2001 Atemp
= input_wait_mask
;
2002 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2003 if ((select (MAXDESC
, &Atemp
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2007 /* It's okay for us to do this and then continue with
2008 the loop, since timeout has already been zeroed out. */
2009 clear_waiting_for_input ();
2014 /* Don't wait for output from a non-running process. */
2015 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
2016 update_status (wait_proc
);
2018 && ! EQ (wait_proc
->status
, Qrun
))
2020 clear_waiting_for_input ();
2024 /* Wait till there is something to do */
2026 if (! XINT (read_kbd
) && wait_for_cell
== 0)
2027 Available
= non_keyboard_wait_mask
;
2029 Available
= input_wait_mask
;
2031 /* If frame size has changed or the window is newly mapped,
2032 redisplay now, before we start to wait. There is a race
2033 condition here; if a SIGIO arrives between now and the select
2034 and indicates that a frame is trashed, the select may block
2035 displaying a trashed screen. */
2036 if (frame_garbaged
&& do_display
)
2038 clear_waiting_for_input ();
2039 redisplay_preserve_echo_area ();
2040 if (XINT (read_kbd
) < 0)
2041 set_waiting_for_input (&timeout
);
2044 if (XINT (read_kbd
) && detect_input_pending ())
2047 FD_ZERO (&Available
);
2050 nfds
= select (MAXDESC
, &Available
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2055 /* Make C-g and alarm signals set flags again */
2056 clear_waiting_for_input ();
2058 /* If we woke up due to SIGWINCH, actually change size now. */
2059 do_pending_window_change ();
2061 if (time_limit
&& nfds
== 0) /* timeout elapsed */
2065 if (xerrno
== EINTR
)
2066 FD_ZERO (&Available
);
2068 /* Ultrix select seems to return ENOMEM when it is
2069 interrupted. Treat it just like EINTR. Bleah. Note
2070 that we want to test for the "ultrix" CPP symbol, not
2071 "__ultrix__"; the latter is only defined under GCC, but
2072 not by DEC's bundled CC. -JimB */
2073 else if (xerrno
== ENOMEM
)
2074 FD_ZERO (&Available
);
2077 /* This happens for no known reason on ALLIANT.
2078 I am guessing that this is the right response. -- RMS. */
2079 else if (xerrno
== EFAULT
)
2080 FD_ZERO (&Available
);
2082 else if (xerrno
== EBADF
)
2085 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
2086 the child's closure of the pts gives the parent a SIGHUP, and
2087 the ptc file descriptor is automatically closed,
2088 yielding EBADF here or at select() call above.
2089 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
2090 in m/ibmrt-aix.h), and here we just ignore the select error.
2091 Cleanup occurs c/o status_notify after SIGCLD. */
2092 FD_ZERO (&Available
); /* Cannot depend on values returned */
2098 error("select error: %s", strerror (xerrno
));
2100 #if defined(sun) && !defined(USG5_4)
2101 else if (nfds
> 0 && keyboard_bit_set (&Available
)
2103 /* System sometimes fails to deliver SIGIO.
2105 David J. Mackenzie says that Emacs doesn't compile under
2106 Solaris if this code is enabled, thus the USG5_4 in the CPP
2107 conditional. "I haven't noticed any ill effects so far.
2108 If you find a Solaris expert somewhere, they might know
2110 kill (getpid (), SIGIO
);
2113 /* Check for keyboard input */
2114 /* If there is any, return immediately
2115 to give it higher priority than subprocesses */
2117 /* We used to do this if wait_for_cell,
2118 but that caused infinite recursion in selection request events. */
2119 if ((XINT (read_kbd
) || wait_for_cell
)
2120 && detect_input_pending ())
2123 if (detect_input_pending ())
2127 /* Exit now if the cell we're waiting for became non-nil. */
2128 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2132 /* If we think we have keyboard input waiting, but didn't get SIGIO
2133 go read it. This can happen with X on BSD after logging out.
2134 In that case, there really is no input and no SIGIO,
2135 but select says there is input. */
2137 if (XINT (read_kbd
) && interrupt_input
2138 && (keyboard_bit_set (&Available
)))
2143 got_some_input
|= nfds
> 0;
2145 /* If checking input just got us a size-change event from X,
2146 obey it now if we should. */
2147 if (XINT (read_kbd
) || wait_for_cell
)
2148 do_pending_window_change ();
2150 /* Check for data from a process. */
2151 /* Really FIRST_PROC_DESC should be 0 on Unix,
2152 but this is safer in the short run. */
2153 for (channel
= 0; channel
<= max_process_desc
; channel
++)
2155 if (FD_ISSET (channel
, &Available
)
2156 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
2160 /* If waiting for this channel, arrange to return as
2161 soon as no more input to be processed. No more
2163 if (wait_channel
== channel
)
2169 proc
= chan_process
[channel
];
2173 /* Read data from the process, starting with our
2174 buffered-ahead character if we have one. */
2176 nread
= read_process_output (proc
, channel
);
2179 /* Since read_process_output can run a filter,
2180 which can call accept-process-output,
2181 don't try to read from any other processes
2182 before doing the select again. */
2183 FD_ZERO (&Available
);
2186 redisplay_preserve_echo_area ();
2189 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2193 else if (nread
== -1 && errno
== EAGAIN
)
2197 else if (nread
== -1 && errno
== EAGAIN
)
2199 /* Note that we cannot distinguish between no input
2200 available now and a closed pipe.
2201 With luck, a closed pipe will be accompanied by
2202 subprocess termination and SIGCHLD. */
2203 else if (nread
== 0 && !NETCONN_P (proc
))
2205 #endif /* O_NDELAY */
2206 #endif /* O_NONBLOCK */
2207 #endif /* EWOULDBLOCK */
2209 /* On some OSs with ptys, when the process on one end of
2210 a pty exits, the other end gets an error reading with
2211 errno = EIO instead of getting an EOF (0 bytes read).
2212 Therefore, if we get an error reading and errno =
2213 EIO, just continue, because the child process has
2214 exited and should clean itself up soon (e.g. when we
2216 else if (nread
== -1 && errno
== EIO
)
2218 #endif /* HAVE_PTYS */
2219 /* If we can detect process termination, don't consider the process
2220 gone just because its pipe is closed. */
2222 else if (nread
== 0 && !NETCONN_P (proc
))
2227 /* Preserve status of processes already terminated. */
2228 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2229 deactivate_process (proc
);
2230 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2231 update_status (XPROCESS (proc
));
2232 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2233 XPROCESS (proc
)->status
2234 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2237 } /* end for each file descriptor */
2238 } /* end while exit conditions not met */
2240 waiting_for_user_input_p
= 0;
2242 /* If calling from keyboard input, do not quit
2243 since we want to return C-g as an input character.
2244 Otherwise, do pending quit if requested. */
2245 if (XINT (read_kbd
) >= 0)
2247 /* Prevent input_pending from remaining set if we quit. */
2248 clear_input_pending ();
2252 return got_some_input
;
2255 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
2258 read_process_output_call (fun_and_args
)
2259 Lisp_Object fun_and_args
;
2261 return apply1 (XCONS (fun_and_args
)->car
, XCONS (fun_and_args
)->cdr
);
2265 read_process_output_error_handler (error
)
2268 cmd_error_internal (error
, "error in process filter: ");
2270 update_echo_area ();
2271 Fsleep_for (make_number (2), Qnil
);
2274 /* Read pending output from the process channel,
2275 starting with our buffered-ahead character if we have one.
2276 Yield number of characters read.
2278 This function reads at most 1024 characters.
2279 If you want to read all available subprocess output,
2280 you must call it repeatedly until it returns zero. */
2282 read_process_output (proc
, channel
)
2284 register int channel
;
2286 register int nchars
;
2292 register Lisp_Object outstream
;
2293 register struct buffer
*old
= current_buffer
;
2294 register struct Lisp_Process
*p
= XPROCESS (proc
);
2295 register int opoint
;
2298 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2300 vs
= get_vms_process_pointer (p
->pid
);
2304 return(0); /* Really weird if it does this */
2305 if (!(vs
->iosb
[0] & 1))
2306 return -1; /* I/O error */
2309 error ("Could not get VMS process pointer");
2310 chars
= vs
->inputBuffer
;
2311 nchars
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2314 start_vms_process_read (vs
); /* Crank up the next read on the process */
2315 return 1; /* Nothing worth printing, say we got 1 */
2319 if (proc_buffered_char
[channel
] < 0)
2321 nchars
= read_child_output (channel
, chars
, sizeof (chars
));
2323 nchars
= read (channel
, chars
, sizeof chars
);
2327 chars
[0] = proc_buffered_char
[channel
];
2328 proc_buffered_char
[channel
] = -1;
2330 nchars
= read_child_output (channel
, chars
+ 1, sizeof (chars
) - 1);
2332 nchars
= read (channel
, chars
+ 1, sizeof chars
- 1);
2337 nchars
= nchars
+ 1;
2339 #endif /* not VMS */
2341 if (nchars
<= 0) return nchars
;
2343 outstream
= p
->filter
;
2344 if (!NILP (outstream
))
2346 /* We inhibit quit here instead of just catching it so that
2347 hitting ^G when a filter happens to be running won't screw
2349 int count
= specpdl_ptr
- specpdl
;
2350 Lisp_Object odeactivate
;
2351 Lisp_Object obuffer
, okeymap
;
2353 /* No need to gcpro these, because all we do with them later
2354 is test them for EQness, and none of them should be a string. */
2355 odeactivate
= Vdeactivate_mark
;
2356 XSETBUFFER (obuffer
, current_buffer
);
2357 okeymap
= current_buffer
->keymap
;
2359 specbind (Qinhibit_quit
, Qt
);
2360 specbind (Qlast_nonmenu_event
, Qt
);
2362 running_asynch_code
= 1;
2363 internal_condition_case_1 (read_process_output_call
,
2366 Fcons (make_string (chars
,
2369 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
2370 read_process_output_error_handler
);
2371 running_asynch_code
= 0;
2372 restore_match_data ();
2374 /* Handling the process output should not deactivate the mark. */
2375 Vdeactivate_mark
= odeactivate
;
2377 if (! EQ (Fcurrent_buffer (), obuffer
)
2378 || ! EQ (current_buffer
->keymap
, okeymap
))
2379 record_asynch_buffer_change ();
2381 if (waiting_for_user_input_p
)
2382 prepare_menu_bars ();
2385 start_vms_process_read (vs
);
2387 unbind_to (count
, Qnil
);
2391 /* If no filter, write into buffer if it isn't dead. */
2392 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2394 Lisp_Object old_read_only
;
2395 Lisp_Object old_begv
, old_zv
;
2396 Lisp_Object odeactivate
;
2398 odeactivate
= Vdeactivate_mark
;
2400 Fset_buffer (p
->buffer
);
2402 old_read_only
= current_buffer
->read_only
;
2403 XSETFASTINT (old_begv
, BEGV
);
2404 XSETFASTINT (old_zv
, ZV
);
2406 current_buffer
->read_only
= Qnil
;
2408 /* Insert new output into buffer
2409 at the current end-of-output marker,
2410 thus preserving logical ordering of input and output. */
2411 if (XMARKER (p
->mark
)->buffer
)
2412 SET_PT (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
));
2416 /* If the output marker is outside of the visible region, save
2417 the restriction and widen. */
2418 if (! (BEGV
<= point
&& point
<= ZV
))
2421 /* Make sure opoint floats ahead of any new text, just as point
2423 if (point
<= opoint
)
2426 /* Insert after old_begv, but before old_zv. */
2427 if (point
< XFASTINT (old_begv
))
2428 XSETFASTINT (old_begv
, XFASTINT (old_begv
) + nchars
);
2429 if (point
<= XFASTINT (old_zv
))
2430 XSETFASTINT (old_zv
, XFASTINT (old_zv
) + nchars
);
2432 /* Insert before markers in case we are inserting where
2433 the buffer's mark is, and the user's next command is Meta-y. */
2434 insert_before_markers (chars
, nchars
);
2435 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
2437 update_mode_lines
++;
2439 /* If the restriction isn't what it should be, set it. */
2440 if (XFASTINT (old_begv
) != BEGV
|| XFASTINT (old_zv
) != ZV
)
2441 Fnarrow_to_region (old_begv
, old_zv
);
2443 /* Handling the process output should not deactivate the mark. */
2444 Vdeactivate_mark
= odeactivate
;
2446 current_buffer
->read_only
= old_read_only
;
2448 set_buffer_internal (old
);
2451 start_vms_process_read (vs
);
2456 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
2458 "Returns non-nil if emacs is waiting for input from the user.\n\
2459 This is intended for use by asynchronous process output filters and sentinels.")
2462 return (waiting_for_user_input_p
? Qt
: Qnil
);
2465 /* Sending data to subprocess */
2467 jmp_buf send_process_frame
;
2470 send_process_trap ()
2476 longjmp (send_process_frame
, 1);
2479 /* Send some data to process PROC.
2480 BUF is the beginning of the data; LEN is the number of characters.
2481 OBJECT is the Lisp object that the data comes from. */
2483 send_process (proc
, buf
, len
, object
)
2484 volatile Lisp_Object proc
;
2489 /* Use volatile to protect variables from being clobbered by longjmp. */
2491 volatile unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
2494 struct Lisp_Process
*p
= XPROCESS (proc
);
2495 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2498 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2499 update_status (XPROCESS (proc
));
2500 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2501 error ("Process %s not running", procname
);
2504 vs
= get_vms_process_pointer (p
->pid
);
2506 error ("Could not find this process: %x", p
->pid
);
2507 else if (write_to_vms_process (vs
, buf
, len
))
2511 if (pty_max_bytes
== 0)
2513 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
2514 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
2516 if (pty_max_bytes
< 0)
2517 pty_max_bytes
= 250;
2519 pty_max_bytes
= 250;
2521 /* Deduct one, to leave space for the eof. */
2525 if (!setjmp (send_process_frame
))
2529 SIGTYPE (*old_sigpipe
)();
2532 /* Decide how much data we can send in one batch.
2533 Long lines need to be split into multiple batches. */
2534 if (!NILP (XPROCESS (proc
)->pty_flag
))
2536 /* Starting this at zero is always correct when not the first iteration
2537 because the previous iteration ended by sending C-d.
2538 It may not be correct for the first iteration
2539 if a partial line was sent in a separate send_process call.
2540 If that proves worth handling, we need to save linepos
2541 in the process object. */
2544 char *end
= buf
+ len
;
2546 /* Scan through this text for a line that is too long. */
2547 while (ptr
!= end
&& linepos
< pty_max_bytes
)
2555 /* If we found one, break the line there
2556 and put in a C-d to force the buffer through. */
2560 /* Send this batch, using one or more write calls. */
2563 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
2564 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
2565 signal (SIGPIPE
, old_sigpipe
);
2571 || errno
== EWOULDBLOCK
2577 /* Buffer is full. Wait, accepting input;
2578 that may allow the program
2579 to finish doing output and read more. */
2584 /* Running filters might relocate buffers or strings.
2585 Arrange to relocate BUF. */
2586 if (BUFFERP (object
))
2587 offset
= BUF_PTR_CHAR_POS (XBUFFER (object
),
2588 (unsigned char *) buf
);
2589 else if (STRINGP (object
))
2590 offset
= buf
- (char *) XSTRING (object
)->data
;
2592 XSETFASTINT (zero
, 0);
2593 wait_reading_process_input (1, 0, zero
, 0);
2595 if (BUFFERP (object
))
2596 buf
= (char *) BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
2597 else if (STRINGP (object
))
2598 buf
= offset
+ (char *) XSTRING (object
)->data
;
2603 /* This is a real error. */
2604 report_file_error ("writing to process", Fcons (proc
, Qnil
));
2611 /* If we sent just part of the string, put in an EOF
2612 to force it through, before we send the rest. */
2614 Fprocess_send_eof (proc
);
2619 XPROCESS (proc
)->raw_status_low
= Qnil
;
2620 XPROCESS (proc
)->raw_status_high
= Qnil
;
2621 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2622 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2623 deactivate_process (proc
);
2625 error ("Error writing to process %s; closed it", procname
);
2627 error ("SIGPIPE raised on process %s; closed it", procname
);
2632 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
2634 "Send current contents of region as input to PROCESS.\n\
2635 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2636 nil, indicating the current buffer's process.\n\
2637 Called from program, takes three arguments, PROCESS, START and END.\n\
2638 If the region is more than 500 characters long,\n\
2639 it is sent in several bunches. This may happen even for shorter regions.\n\
2640 Output from processes can arrive in between bunches.")
2641 (process
, start
, end
)
2642 Lisp_Object process
, start
, end
;
2647 proc
= get_process (process
);
2648 validate_region (&start
, &end
);
2650 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
2653 start1
= XINT (start
);
2654 send_process (proc
, &FETCH_CHAR (start1
), XINT (end
) - XINT (start
),
2655 Fcurrent_buffer ());
2660 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
2662 "Send PROCESS the contents of STRING as input.\n\
2663 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2664 nil, indicating the current buffer's process.\n\
2665 If STRING is more than 500 characters long,\n\
2666 it is sent in several bunches. This may happen even for shorter strings.\n\
2667 Output from processes can arrive in between bunches.")
2669 Lisp_Object process
, string
;
2672 CHECK_STRING (string
, 1);
2673 proc
= get_process (process
);
2674 send_process (proc
, XSTRING (string
)->data
, XSTRING (string
)->size
, string
);
2678 /* send a signal number SIGNO to PROCESS.
2679 CURRENT_GROUP means send to the process group that currently owns
2680 the terminal being used to communicate with PROCESS.
2681 This is used for various commands in shell mode.
2682 If NOMSG is zero, insert signal-announcements into process's buffers
2685 If we can, we try to signal PROCESS by sending control characters
2686 down the pty. This allows us to signal inferiors who have changed
2687 their uid, for which killpg would return an EPERM error. */
2690 process_send_signal (process
, signo
, current_group
, nomsg
)
2691 Lisp_Object process
;
2693 Lisp_Object current_group
;
2697 register struct Lisp_Process
*p
;
2701 proc
= get_process (process
);
2702 p
= XPROCESS (proc
);
2704 if (!EQ (p
->childp
, Qt
))
2705 error ("Process %s is not a subprocess",
2706 XSTRING (p
->name
)->data
);
2707 if (XINT (p
->infd
) < 0)
2708 error ("Process %s is not active",
2709 XSTRING (p
->name
)->data
);
2711 if (NILP (p
->pty_flag
))
2712 current_group
= Qnil
;
2714 /* If we are using pgrps, get a pgrp number and make it negative. */
2715 if (!NILP (current_group
))
2717 #ifdef SIGNALS_VIA_CHARACTERS
2718 /* If possible, send signals to the entire pgrp
2719 by sending an input character to it. */
2721 /* TERMIOS is the latest and bestest, and seems most likely to
2722 work. If the system has it, use it. */
2729 tcgetattr (XINT (p
->infd
), &t
);
2730 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2734 tcgetattr (XINT (p
->infd
), &t
);
2735 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2739 tcgetattr (XINT (p
->infd
), &t
);
2740 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
2741 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2743 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
2748 #else /* ! HAVE_TERMIOS */
2750 /* On Berkeley descendants, the following IOCTL's retrieve the
2751 current control characters. */
2752 #if defined (TIOCGLTC) && defined (TIOCGETC)
2760 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2761 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
2764 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2765 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
2769 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
2770 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
2772 #endif /* ! defined (SIGTSTP) */
2775 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2777 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
2784 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2785 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2788 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2789 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2793 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2794 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2796 #endif /* ! defined (SIGTSTP) */
2798 #else /* ! defined (TCGETA) */
2799 Your configuration files are messed up
.
2800 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
2801 you'd better be using one of the alternatives above! */
2802 #endif /* ! defined (TCGETA) */
2803 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2804 #endif /* ! defined HAVE_TERMIOS */
2805 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
2808 /* Get the pgrp using the tty itself, if we have that.
2809 Otherwise, use the pty to get the pgrp.
2810 On pfa systems, saka@pfu.fujitsu.co.JP writes:
2811 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
2812 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
2813 His patch indicates that if TIOCGPGRP returns an error, then
2814 we should just assume that p->pid is also the process group id. */
2818 if (!NILP (p
->subtty
))
2819 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
2821 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
2825 gid
= - XFASTINT (p
->pid
);
2826 #endif /* ! defined (pfa) */
2832 #else /* ! defined (TIOCGPGRP ) */
2833 /* Can't select pgrps on this system, so we know that
2834 the child itself heads the pgrp. */
2835 gid
= - XFASTINT (p
->pid
);
2836 #endif /* ! defined (TIOCGPGRP ) */
2839 gid
= - XFASTINT (p
->pid
);
2845 p
->raw_status_low
= Qnil
;
2846 p
->raw_status_high
= Qnil
;
2848 XSETINT (p
->tick
, ++process_tick
);
2852 #endif /* ! defined (SIGCONT) */
2855 send_process (proc
, "\003", 1, Qnil
); /* ^C */
2860 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
2865 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
2868 flush_pending_output (XINT (p
->infd
));
2872 /* If we don't have process groups, send the signal to the immediate
2873 subprocess. That isn't really right, but it's better than any
2874 obvious alternative. */
2877 kill (XFASTINT (p
->pid
), signo
);
2881 /* gid may be a pid, or minus a pgrp's number */
2883 if (!NILP (current_group
))
2884 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
2887 gid
= - XFASTINT (p
->pid
);
2890 #else /* ! defined (TIOCSIGSEND) */
2891 EMACS_KILLPG (-gid
, signo
);
2892 #endif /* ! defined (TIOCSIGSEND) */
2895 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
2896 "Interrupt process PROCESS. May be process or name of one.\n\
2897 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
2898 nil or no arg means current buffer's process.\n\
2899 Second arg CURRENT-GROUP non-nil means send signal to\n\
2900 the current process-group of the process's controlling terminal\n\
2901 rather than to the process's own process group.\n\
2902 If the process is a shell, this means interrupt current subjob\n\
2903 rather than the shell.")
2904 (process
, current_group
)
2905 Lisp_Object process
, current_group
;
2907 process_send_signal (process
, SIGINT
, current_group
, 0);
2911 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
2912 "Kill process PROCESS. May be process or name of one.\n\
2913 See function `interrupt-process' for more details on usage.")
2914 (process
, current_group
)
2915 Lisp_Object process
, current_group
;
2917 process_send_signal (process
, SIGKILL
, current_group
, 0);
2921 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
2922 "Send QUIT signal to process PROCESS. May be process or name of one.\n\
2923 See function `interrupt-process' for more details on usage.")
2924 (process
, current_group
)
2925 Lisp_Object process
, current_group
;
2927 process_send_signal (process
, SIGQUIT
, current_group
, 0);
2931 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
2932 "Stop process PROCESS. May be process or name of one.\n\
2933 See function `interrupt-process' for more details on usage.")
2934 (process
, current_group
)
2935 Lisp_Object process
, current_group
;
2938 error ("no SIGTSTP support");
2940 process_send_signal (process
, SIGTSTP
, current_group
, 0);
2945 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
2946 "Continue process PROCESS. May be process or name of one.\n\
2947 See function `interrupt-process' for more details on usage.")
2948 (process
, current_group
)
2949 Lisp_Object process
, current_group
;
2952 process_send_signal (process
, SIGCONT
, current_group
, 0);
2954 error ("no SIGCONT support");
2959 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
2960 2, 2, "nProcess number: \nnSignal code: ",
2961 "Send the process with process id PID the signal with code SIGCODE.\n\
2962 PID must be an integer. The process need not be a child of this Emacs.\n\
2963 SIGCODE may be an integer, or a symbol whose name is a signal name.")
2965 Lisp_Object pid
, sigcode
;
2967 CHECK_NUMBER (pid
, 0);
2969 #define handle_signal(NAME, VALUE) \
2970 else if (!strcmp (name, NAME)) \
2971 XSETINT (sigcode, VALUE)
2973 if (INTEGERP (sigcode
))
2977 unsigned char *name
;
2979 CHECK_SYMBOL (sigcode
, 1);
2980 name
= XSYMBOL (sigcode
)->name
->data
;
2985 handle_signal ("SIGHUP", SIGHUP
);
2988 handle_signal ("SIGINT", SIGINT
);
2991 handle_signal ("SIGQUIT", SIGQUIT
);
2994 handle_signal ("SIGILL", SIGILL
);
2997 handle_signal ("SIGABRT", SIGABRT
);
3000 handle_signal ("SIGEMT", SIGEMT
);
3003 handle_signal ("SIGKILL", SIGKILL
);
3006 handle_signal ("SIGFPE", SIGFPE
);
3009 handle_signal ("SIGBUS", SIGBUS
);
3012 handle_signal ("SIGSEGV", SIGSEGV
);
3015 handle_signal ("SIGSYS", SIGSYS
);
3018 handle_signal ("SIGPIPE", SIGPIPE
);
3021 handle_signal ("SIGALRM", SIGALRM
);
3024 handle_signal ("SIGTERM", SIGTERM
);
3027 handle_signal ("SIGURG", SIGURG
);
3030 handle_signal ("SIGSTOP", SIGSTOP
);
3033 handle_signal ("SIGTSTP", SIGTSTP
);
3036 handle_signal ("SIGCONT", SIGCONT
);
3039 handle_signal ("SIGCHLD", SIGCHLD
);
3042 handle_signal ("SIGTTIN", SIGTTIN
);
3045 handle_signal ("SIGTTOU", SIGTTOU
);
3048 handle_signal ("SIGIO", SIGIO
);
3051 handle_signal ("SIGXCPU", SIGXCPU
);
3054 handle_signal ("SIGXFSZ", SIGXFSZ
);
3057 handle_signal ("SIGVTALRM", SIGVTALRM
);
3060 handle_signal ("SIGPROF", SIGPROF
);
3063 handle_signal ("SIGWINCH", SIGWINCH
);
3066 handle_signal ("SIGINFO", SIGINFO
);
3069 handle_signal ("SIGUSR1", SIGUSR1
);
3072 handle_signal ("SIGUSR2", SIGUSR2
);
3075 error ("Undefined signal name %s", name
);
3078 #undef handle_signal
3081 /* Only works for kill-type signals */
3082 return make_number (win32_kill_process (XINT (pid
), XINT (sigcode
)));
3084 return make_number (kill (XINT (pid
), XINT (sigcode
)));
3088 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
3089 "Make PROCESS see end-of-file in its input.\n\
3090 Eof comes after any text already sent to it.\n\
3091 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3092 nil, indicating the current buffer's process.\n\
3093 If PROCESS is a network connection, or is a process communicating\n\
3094 through a pipe (as opposed to a pty), then you cannot send any more\n\
3095 text to PROCESS after you call this function.")
3097 Lisp_Object process
;
3101 proc
= get_process (process
);
3103 /* Make sure the process is really alive. */
3104 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3105 update_status (XPROCESS (proc
));
3106 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3107 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
3110 send_process (proc
, "\032", 1, Qnil
); /* ^z */
3112 if (!NILP (XPROCESS (proc
)->pty_flag
))
3113 send_process (proc
, "\004", 1, Qnil
);
3116 close (XINT (XPROCESS (proc
)->outfd
));
3117 XSETINT (XPROCESS (proc
)->outfd
, open (NULL_DEVICE
, O_WRONLY
));
3123 /* Kill all processes associated with `buffer'.
3124 If `buffer' is nil, kill all processes */
3126 kill_buffer_processes (buffer
)
3129 Lisp_Object tail
, proc
;
3131 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3133 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3134 if (GC_PROCESSP (proc
)
3135 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
3137 if (NETCONN_P (proc
))
3138 Fdelete_process (proc
);
3139 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
3140 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
3145 /* On receipt of a signal that a child status has changed,
3146 loop asking about children with changed statuses until
3147 the system says there are no more.
3148 All we do is change the status;
3149 we do not run sentinels or print notifications.
3150 That is saved for the next time keyboard input is done,
3151 in order to avoid timing errors. */
3153 /** WARNING: this can be called during garbage collection.
3154 Therefore, it must not be fooled by the presence of mark bits in
3157 /** USG WARNING: Although it is not obvious from the documentation
3158 in signal(2), on a USG system the SIGCLD handler MUST NOT call
3159 signal() before executing at least one wait(), otherwise the handler
3160 will be called again, resulting in an infinite loop. The relevant
3161 portion of the documentation reads "SIGCLD signals will be queued
3162 and the signal-catching function will be continually reentered until
3163 the queue is empty". Invoking signal() causes the kernel to reexamine
3164 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
3167 sigchld_handler (signo
)
3170 int old_errno
= errno
;
3172 register struct Lisp_Process
*p
;
3173 extern EMACS_TIME
*input_available_clear_time
;
3177 sigheld
|= sigbit (SIGCHLD
);
3189 #endif /* no WUNTRACED */
3190 /* Keep trying to get a status until we get a definitive result. */
3194 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
3196 while (pid
<= 0 && errno
== EINTR
);
3200 /* A real failure. We have done all our job, so return. */
3202 /* USG systems forget handlers when they are used;
3203 must reestablish each time */
3205 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
3208 sigheld
&= ~sigbit (SIGCHLD
);
3216 #endif /* no WNOHANG */
3218 /* Find the process that signaled us, and record its status. */
3221 for (tail
= Vprocess_alist
; XSYMBOL (tail
) != XSYMBOL (Qnil
); tail
= XCONS (tail
)->cdr
)
3223 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3224 p
= XPROCESS (proc
);
3225 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
3230 /* Look for an asynchronous process whose pid hasn't been filled
3233 for (tail
= Vprocess_alist
; XSYMBOL (tail
) != XSYMBOL (Qnil
); tail
= XCONS (tail
)->cdr
)
3235 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3236 p
= XPROCESS (proc
);
3237 if (INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
3242 /* Change the status of the process that was found. */
3245 union { int i
; WAITTYPE wt
; } u
;
3246 int clear_desc_flag
= 0;
3248 XSETINT (p
->tick
, ++process_tick
);
3250 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
3251 XSETINT (p
->raw_status_high
, u
.i
>> 16);
3253 /* If process has terminated, stop waiting for its output. */
3254 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
3255 && XINT (p
->infd
) >= 0)
3256 clear_desc_flag
= 1;
3258 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
3259 if (clear_desc_flag
)
3261 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
3262 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
3265 /* Tell wait_reading_process_input that it needs to wake up and
3267 if (input_available_clear_time
)
3268 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3271 /* There was no asynchronous process found for that id. Check
3272 if we have a synchronous process. */
3275 synch_process_alive
= 0;
3277 /* Report the status of the synchronous process. */
3279 synch_process_retcode
= WRETCODE (w
);
3280 else if (WIFSIGNALED (w
))
3282 int code
= WTERMSIG (w
);
3288 /* Suppress warning if the table has const char *. */
3289 signame
= (char *) sys_siglist
[code
];
3291 signame
= sys_errlist
[code
];
3295 signame
= "unknown";
3297 synch_process_death
= signame
;
3300 /* Tell wait_reading_process_input that it needs to wake up and
3302 if (input_available_clear_time
)
3303 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3306 /* On some systems, we must return right away.
3307 If any more processes want to signal us, we will
3309 Otherwise (on systems that have WNOHANG), loop around
3310 to use up all the processes that have something to tell us. */
3311 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT)
3313 signal (signo
, sigchld_handler
);
3317 #endif /* USG, but not HPUX with WNOHANG */
3323 exec_sentinel_unwind (data
)
3326 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
3331 exec_sentinel_error_handler (error
)
3334 cmd_error_internal (error
, "error in process sentinel: ");
3336 update_echo_area ();
3337 Fsleep_for (make_number (2), Qnil
);
3341 exec_sentinel (proc
, reason
)
3342 Lisp_Object proc
, reason
;
3344 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
3345 register struct Lisp_Process
*p
= XPROCESS (proc
);
3346 int count
= specpdl_ptr
- specpdl
;
3348 /* No need to gcpro these, because all we do with them later
3349 is test them for EQness, and none of them should be a string. */
3350 odeactivate
= Vdeactivate_mark
;
3351 XSETBUFFER (obuffer
, current_buffer
);
3352 okeymap
= current_buffer
->keymap
;
3354 sentinel
= p
->sentinel
;
3355 if (NILP (sentinel
))
3358 /* Zilch the sentinel while it's running, to avoid recursive invocations;
3359 assure that it gets restored no matter how the sentinel exits. */
3361 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
3362 /* Inhibit quit so that random quits don't screw up a running filter. */
3363 specbind (Qinhibit_quit
, Qt
);
3364 specbind (Qlast_nonmenu_event
, Qt
);
3366 running_asynch_code
= 1;
3367 internal_condition_case_1 (read_process_output_call
,
3369 Fcons (proc
, Fcons (reason
, Qnil
))),
3370 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
3371 exec_sentinel_error_handler
);
3372 running_asynch_code
= 0;
3373 restore_match_data ();
3375 Vdeactivate_mark
= odeactivate
;
3376 if (! EQ (Fcurrent_buffer (), obuffer
)
3377 || ! EQ (current_buffer
->keymap
, okeymap
))
3378 record_asynch_buffer_change ();
3380 if (waiting_for_user_input_p
)
3381 prepare_menu_bars ();
3382 unbind_to (count
, Qnil
);
3385 /* Report all recent events of a change in process status
3386 (either run the sentinel or output a message).
3387 This is done while Emacs is waiting for keyboard input. */
3391 register Lisp_Object proc
, buffer
;
3392 Lisp_Object tail
, msg
;
3393 struct gcpro gcpro1
, gcpro2
;
3397 /* We need to gcpro tail; if read_process_output calls a filter
3398 which deletes a process and removes the cons to which tail points
3399 from Vprocess_alist, and then causes a GC, tail is an unprotected
3403 /* Set this now, so that if new processes are created by sentinels
3404 that we run, we get called again to handle their status changes. */
3405 update_tick
= process_tick
;
3407 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
3410 register struct Lisp_Process
*p
;
3412 proc
= Fcdr (Fcar (tail
));
3413 p
= XPROCESS (proc
);
3415 if (XINT (p
->tick
) != XINT (p
->update_tick
))
3417 XSETINT (p
->update_tick
, XINT (p
->tick
));
3419 /* If process is still active, read any output that remains. */
3420 if (XINT (p
->infd
) >= 0)
3421 while (! EQ (p
->filter
, Qt
)
3422 && read_process_output (proc
, XINT (p
->infd
)) > 0);
3426 /* Get the text to use for the message. */
3427 if (!NILP (p
->raw_status_low
))
3429 msg
= status_message (p
->status
);
3431 /* If process is terminated, deactivate it or delete it. */
3433 if (CONSP (p
->status
))
3434 symbol
= XCONS (p
->status
)->car
;
3436 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
3437 || EQ (symbol
, Qclosed
))
3439 if (delete_exited_processes
)
3440 remove_process (proc
);
3442 deactivate_process (proc
);
3445 /* Now output the message suitably. */
3446 if (!NILP (p
->sentinel
))
3447 exec_sentinel (proc
, msg
);
3448 /* Don't bother with a message in the buffer
3449 when a process becomes runnable. */
3450 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
3452 Lisp_Object ro
, tem
;
3453 struct buffer
*old
= current_buffer
;
3456 ro
= XBUFFER (buffer
)->read_only
;
3458 /* Avoid error if buffer is deleted
3459 (probably that's why the process is dead, too) */
3460 if (NILP (XBUFFER (buffer
)->name
))
3462 Fset_buffer (buffer
);
3464 /* Insert new output into buffer
3465 at the current end-of-output marker,
3466 thus preserving logical ordering of input and output. */
3467 if (XMARKER (p
->mark
)->buffer
)
3468 SET_PT (marker_position (p
->mark
));
3471 if (point
<= opoint
)
3472 opoint
+= XSTRING (msg
)->size
+ XSTRING (p
->name
)->size
+ 10;
3474 tem
= current_buffer
->read_only
;
3475 current_buffer
->read_only
= Qnil
;
3476 insert_string ("\nProcess ");
3477 Finsert (1, &p
->name
);
3478 insert_string (" ");
3480 current_buffer
->read_only
= tem
;
3481 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
3484 set_buffer_internal (old
);
3489 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
3490 redisplay_preserve_echo_area ();
3495 /* The first time this is called, assume keyboard input comes from DESC
3496 instead of from where we used to expect it.
3497 Subsequent calls mean assume input keyboard can come from DESC
3498 in addition to other places. */
3500 static int add_keyboard_wait_descriptor_called_flag
;
3503 add_keyboard_wait_descriptor (desc
)
3506 if (! add_keyboard_wait_descriptor_called_flag
)
3507 FD_CLR (0, &input_wait_mask
);
3508 add_keyboard_wait_descriptor_called_flag
= 1;
3509 FD_SET (desc
, &input_wait_mask
);
3510 if (desc
> max_keyboard_desc
)
3511 max_keyboard_desc
= desc
;
3514 /* From now on, do not expect DESC to give keyboard input. */
3517 delete_keyboard_wait_descriptor (desc
)
3521 int lim
= max_keyboard_desc
;
3523 FD_CLR (desc
, &input_wait_mask
);
3525 if (desc
== max_keyboard_desc
)
3526 for (fd
= 0; fd
< lim
; fd
++)
3527 if (FD_ISSET (fd
, &input_wait_mask
)
3528 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3529 max_keyboard_desc
= fd
;
3532 /* Return nonzero if *MASK has a bit set
3533 that corresponds to one of the keyboard input descriptors. */
3536 keyboard_bit_set (mask
)
3541 for (fd
= 0; fd
< max_keyboard_desc
; fd
++)
3542 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
3543 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3555 if (! noninteractive
|| initialized
)
3557 signal (SIGCHLD
, sigchld_handler
);
3560 FD_ZERO (&input_wait_mask
);
3561 FD_ZERO (&non_keyboard_wait_mask
);
3562 max_process_desc
= 0;
3564 FD_SET (0, &input_wait_mask
);
3566 Vprocess_alist
= Qnil
;
3567 for (i
= 0; i
< MAXDESC
; i
++)
3569 chan_process
[i
] = Qnil
;
3570 proc_buffered_char
[i
] = -1;
3577 stream_process
= intern ("stream");
3579 Qprocessp
= intern ("processp");
3580 staticpro (&Qprocessp
);
3581 Qrun
= intern ("run");
3583 Qstop
= intern ("stop");
3585 Qsignal
= intern ("signal");
3586 staticpro (&Qsignal
);
3588 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
3591 Qexit = intern ("exit");
3592 staticpro (&Qexit); */
3594 Qopen
= intern ("open");
3596 Qclosed
= intern ("closed");
3597 staticpro (&Qclosed
);
3599 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
3600 staticpro (&Qlast_nonmenu_event
);
3602 staticpro (&Vprocess_alist
);
3604 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
3605 "*Non-nil means delete processes immediately when they exit.\n\
3606 nil means don't delete them until `list-processes' is run.");
3608 delete_exited_processes
= 1;
3610 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
3611 "Control type of device used to communicate with subprocesses.\n\
3612 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
3613 The value has no effect if the system has no ptys or if all ptys are busy:\n\
3614 then a pipe is used in any case.\n\
3615 The value takes effect when `start-process' is called.");
3616 Vprocess_connection_type
= Qt
;
3618 defsubr (&Sprocessp
);
3619 defsubr (&Sget_process
);
3620 defsubr (&Sget_buffer_process
);
3621 defsubr (&Sdelete_process
);
3622 defsubr (&Sprocess_status
);
3623 defsubr (&Sprocess_exit_status
);
3624 defsubr (&Sprocess_id
);
3625 defsubr (&Sprocess_name
);
3626 defsubr (&Sprocess_tty_name
);
3627 defsubr (&Sprocess_command
);
3628 defsubr (&Sset_process_buffer
);
3629 defsubr (&Sprocess_buffer
);
3630 defsubr (&Sprocess_mark
);
3631 defsubr (&Sset_process_filter
);
3632 defsubr (&Sprocess_filter
);
3633 defsubr (&Sset_process_sentinel
);
3634 defsubr (&Sset_process_window_size
);
3635 defsubr (&Sprocess_sentinel
);
3636 defsubr (&Sprocess_kill_without_query
);
3637 defsubr (&Slist_processes
);
3638 defsubr (&Sprocess_list
);
3639 defsubr (&Sstart_process
);
3641 defsubr (&Sopen_network_stream
);
3642 #endif /* HAVE_SOCKETS */
3643 defsubr (&Saccept_process_output
);
3644 defsubr (&Sprocess_send_region
);
3645 defsubr (&Sprocess_send_string
);
3646 defsubr (&Sinterrupt_process
);
3647 defsubr (&Skill_process
);
3648 defsubr (&Squit_process
);
3649 defsubr (&Sstop_process
);
3650 defsubr (&Scontinue_process
);
3651 defsubr (&Sprocess_send_eof
);
3652 defsubr (&Ssignal_process
);
3653 defsubr (&Swaiting_for_user_input_p
);
3654 /* defsubr (&Sprocess_connection); */
3658 #else /* not subprocesses */
3660 #include <sys/types.h>
3664 #include "systime.h"
3665 #include "termopts.h"
3666 #include "sysselect.h"
3668 extern int frame_garbaged
;
3671 /* As described above, except assuming that there are no subprocesses:
3673 Wait for timeout to elapse and/or keyboard input to be available.
3676 timeout in seconds, or
3677 zero for no limit, or
3678 -1 means gobble data immediately available but don't wait for any.
3680 read_kbd is a Lisp_Object:
3681 0 to ignore keyboard input, or
3682 1 to return when input is available, or
3683 -1 means caller will actually read the input, so don't throw to
3685 We know that read_kbd will never be a Lisp_Process, since
3686 `subprocesses' isn't defined.
3688 do_display != 0 means redisplay should be done to show subprocess
3689 output that arrives.
3691 Return true iff we received input from any process. */
3694 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
3695 int time_limit
, microsecs
;
3696 Lisp_Object read_kbd
;
3699 EMACS_TIME end_time
, timeout
, *timeout_p
;
3702 /* What does time_limit really mean? */
3703 if (time_limit
|| microsecs
)
3705 /* It's not infinite. */
3706 timeout_p
= &timeout
;
3708 if (time_limit
== -1)
3709 /* In fact, it's zero. */
3710 EMACS_SET_SECS_USECS (timeout
, 0, 0);
3712 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
3714 /* How far in the future is that? */
3715 EMACS_GET_TIME (end_time
);
3716 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
3719 /* It's infinite. */
3722 /* This must come before stop_polling. */
3723 prepare_menu_bars ();
3725 /* Turn off periodic alarms (in case they are in use)
3726 because the select emulator uses alarms. */
3733 waitchannels
= XINT (read_kbd
) ? 1 : 0;
3735 /* If calling from keyboard input, do not quit
3736 since we want to return C-g as an input character.
3737 Otherwise, do pending quit if requested. */
3738 if (XINT (read_kbd
) >= 0)
3743 EMACS_GET_TIME (*timeout_p
);
3744 EMACS_SUB_TIME (*timeout_p
, end_time
, *timeout_p
);
3745 if (EMACS_TIME_NEG_P (*timeout_p
))
3749 /* Cause C-g and alarm signals to take immediate action,
3750 and cause input available signals to zero out timeout. */
3751 if (XINT (read_kbd
) < 0)
3752 set_waiting_for_input (&timeout
);
3754 /* If a frame has been newly mapped and needs updating,
3755 reprocess its display stuff. */
3756 if (frame_garbaged
&& do_display
)
3757 redisplay_preserve_echo_area ();
3759 if (XINT (read_kbd
) && detect_input_pending ())
3762 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
3765 /* Make C-g and alarm signals set flags again */
3766 clear_waiting_for_input ();
3768 /* If we woke up due to SIGWINCH, actually change size now. */
3769 do_pending_window_change ();
3773 /* If the system call was interrupted, then go around the
3779 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
3780 /* System sometimes fails to deliver SIGIO. */
3781 kill (getpid (), SIGIO
);
3784 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
3788 /* If we have timed out (nfds == 0) or found some input (nfds > 0),
3800 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
3801 /* Don't confuse make-docfile by having two doc strings for this function.
3802 make-docfile does not pay attention to #if, for good reason! */
3805 register Lisp_Object name
;
3810 /* Kill all processes associated with `buffer'.
3811 If `buffer' is nil, kill all processes.
3812 Since we have no subprocesses, this does nothing. */
3814 kill_buffer_processes (buffer
)
3825 defsubr (&Sget_buffer_process
);
3829 #endif /* not subprocesses */