1 /* Asynchronous subprocess control for GNU Emacs.
2 Copyright (C) 1985, 86, 87, 88, 93, 94 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
6 GNU Emacs is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU Emacs is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU Emacs; see the file COPYING. If not, write to
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
25 /* This file is split into two parts by the following preprocessor
26 conditional. The 'then' clause contains all of the support for
27 asynchronous subprocesses. The 'else' clause contains stub
28 versions of some of the asynchronous subprocess routines that are
29 often called elsewhere in Emacs, so we don't have to #ifdef the
30 sections that call them. */
38 #include <sys/types.h> /* some typedefs are used in sys/file.h */
45 #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */
46 #include <sys/socket.h>
48 #include <netinet/in.h>
49 #include <arpa/inet.h>
50 #endif /* HAVE_SOCKETS */
52 /* TERM is a poor-man's SLIP, used on Linux. */
57 /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */
58 #ifdef HAVE_BROKEN_INET_ADDR
59 #define IN_ADDR struct in_addr
60 #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1)
62 #define IN_ADDR unsigned long
63 #define NUMERIC_ADDR_ERROR (numeric_addr == -1)
66 #if defined(BSD) || defined(STRIDE)
67 #include <sys/ioctl.h>
68 #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5)
70 #endif /* HAVE_PTYS and no O_NDELAY */
71 #endif /* BSD or STRIDE */
73 #ifdef BROKEN_O_NONBLOCK
75 #endif /* BROKEN_O_NONBLOCK */
82 #include <sys/sysmacros.h> /* for "minor" */
92 #include "termhooks.h"
97 Lisp_Object Qprocessp
;
98 Lisp_Object Qrun
, Qstop
, Qsignal
, Qopen
, Qclosed
;
99 Lisp_Object Qlast_nonmenu_event
;
100 /* Qexit is declared and initialized in eval.c. */
102 /* a process object is a network connection when its childp field is neither
103 Qt nor Qnil but is instead a string (name of foreign host we
104 are connected to + name of port we are connected to) */
107 static Lisp_Object stream_process
;
109 #define NETCONN_P(p) (XGCTYPE (XPROCESS (p)->childp) == Lisp_String)
111 #define NETCONN_P(p) 0
112 #endif /* HAVE_SOCKETS */
114 /* Define first descriptor number available for subprocesses. */
116 #define FIRST_PROC_DESC 1
118 #define FIRST_PROC_DESC 3
121 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
124 #if !defined (SIGCHLD) && defined (SIGCLD)
125 #define SIGCHLD SIGCLD
128 #include "syssignal.h"
133 extern char *strerror ();
135 extern char *sys_errlist
[];
142 #ifndef SYS_SIGLIST_DECLARED
146 extern char *sys_siglist
[];
147 #endif /* not LINUX */
149 char *sys_siglist
[] =
155 "illegal instruction",
159 "floating point exception",
162 "segmentation violation",
163 "bad argument to system call",
164 "write on a pipe with no one to read it",
166 "software termination signal from kill",
168 "sendable stop signal not from tty",
169 "stop signal from tty",
170 "continue a stopped process",
171 "child status has changed",
172 "background read attempted from control tty",
173 "background write attempted from control tty",
174 "input record available at control tty",
175 "exceeded CPU time limit",
176 "exceeded file size limit"
180 #endif /* ! SYS_SIGLIST_DECLARED */
182 /* t means use pty, nil means use a pipe,
183 maybe other values to come. */
184 static Lisp_Object Vprocess_connection_type
;
188 #include <sys/socket.h>
192 /* Number of events of change of status of a process. */
193 static int process_tick
;
195 /* Number of events for which the user or sentinel has been notified. */
196 static int update_tick
;
199 /* We could get this from param.h, but better not to depend on finding that.
200 And better not to risk that it might define other symbols used in this
203 #define MAXDESC FD_SETSIZE
207 #define SELECT_TYPE fd_set
208 #else /* no FD_SET */
210 #define SELECT_TYPE int
212 /* Define the macros to access a single-int bitmap of descriptors. */
213 #define FD_SET(n, p) (*(p) |= (1 << (n)))
214 #define FD_CLR(n, p) (*(p) &= ~(1 << (n)))
215 #define FD_ISSET(n, p) (*(p) & (1 << (n)))
216 #define FD_ZERO(p) (*(p) = 0)
217 #endif /* no FD_SET */
219 /* If we support X Windows, turn on the code to poll periodically
220 to detect C-g. It isn't actually used when doing interrupt input. */
221 #ifdef HAVE_X_WINDOWS
222 #define POLL_FOR_INPUT
225 /* Mask of bits indicating the descriptors that we wait for input on */
227 static SELECT_TYPE input_wait_mask
;
229 /* The largest descriptor currently in use for a process object. */
230 static int max_process_desc
;
232 /* Descriptor to use for keyboard input. */
233 static int keyboard_descriptor
;
235 /* Nonzero means delete a process right away if it exits. */
236 static int delete_exited_processes
;
238 /* Indexed by descriptor, gives the process (if any) for that descriptor */
239 Lisp_Object chan_process
[MAXDESC
];
241 /* Alist of elements (NAME . PROCESS) */
242 Lisp_Object Vprocess_alist
;
244 /* Buffered-ahead input char from process, indexed by channel.
245 -1 means empty (no char is buffered).
246 Used on sys V where the only way to tell if there is any
247 output from the process is to read at least one char.
248 Always -1 on systems that support FIONREAD. */
250 static int proc_buffered_char
[MAXDESC
];
252 static Lisp_Object
get_process ();
254 /* Maximum number of bytes to send to a pty without an eof. */
255 static int pty_max_bytes
;
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
)
303 if (XTYPE (l
) == Lisp_Symbol
)
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 signame
= sys_siglist
[code
];
339 signame
= sys_errlist
[code
];
344 string
= build_string (signame
);
345 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
346 XSTRING (string
)->data
[0] = DOWNCASE (XSTRING (string
)->data
[0]);
347 return concat2 (string
, string2
);
349 else if (EQ (symbol
, Qexit
))
352 return build_string ("finished\n");
353 string
= Fnumber_to_string (make_number (code
));
354 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
355 return concat2 (build_string ("exited abnormally with code "),
356 concat2 (string
, string2
));
359 return Fcopy_sequence (Fsymbol_name (symbol
));
364 /* Open an available pty, returning a file descriptor.
365 Return -1 on failure.
366 The file name of the terminal corresponding to the pty
367 is left in the variable pty_name. */
378 /* Some systems name their pseudoterminals so that there are gaps in
379 the usual sequence - for example, on HP9000/S700 systems, there
380 are no pseudoterminals with names ending in 'f'. So we wait for
381 three failures in a row before deciding that we've reached the
383 int failed_count
= 0;
388 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
389 for (i
= 0; i
< 16; i
++)
392 #ifdef PTY_NAME_SPRINTF
395 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
396 #endif /* no PTY_NAME_SPRINTF */
400 #else /* no PTY_OPEN */
402 /* Unusual IRIS code */
403 *ptyv
= open ("/dev/ptc", O_RDWR
| O_NDELAY
, 0);
406 if (fstat (fd
, &stb
) < 0)
409 if (stat (pty_name
, &stb
) < 0)
412 if (failed_count
>= 3)
418 fd
= open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
420 fd
= open (pty_name
, O_RDWR
| O_NDELAY
, 0);
422 #endif /* not IRIS */
423 #endif /* no PTY_OPEN */
427 /* check to make certain that both sides are available
428 this avoids a nasty yet stupid bug in rlogins */
429 #ifdef PTY_TTY_NAME_SPRINTF
432 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
433 #endif /* no PTY_TTY_NAME_SPRINTF */
435 if (access (pty_name
, 6) != 0)
438 #if !defined(IRIS) && !defined(__sgi)
444 #endif /* not UNIPLUS */
451 #endif /* HAVE_PTYS */
457 register Lisp_Object val
, tem
, name1
;
458 register struct Lisp_Process
*p
;
462 /* size of process structure includes the vector header,
463 so deduct for that. But struct Lisp_Vector includes the first
464 element, thus deducts too much, so add it back. */
465 val
= Fmake_vector (make_number ((sizeof (struct Lisp_Process
)
466 - sizeof (struct Lisp_Vector
)
467 + sizeof (Lisp_Object
))
468 / sizeof (Lisp_Object
)),
470 XSETTYPE (val
, Lisp_Process
);
473 XSET (p
->infd
, Lisp_Int
, -1);
474 XSET (p
->outfd
, Lisp_Int
, -1);
475 XFASTINT (p
->pid
) = 0;
476 XFASTINT (p
->tick
) = 0;
477 XFASTINT (p
->update_tick
) = 0;
478 p
->raw_status_low
= Qnil
;
479 p
->raw_status_high
= Qnil
;
481 p
->mark
= Fmake_marker ();
483 /* If name is already in use, modify it until it is unused. */
488 tem
= Fget_process (name1
);
489 if (NILP (tem
)) break;
490 sprintf (suffix
, "<%d>", i
);
491 name1
= concat2 (name
, build_string (suffix
));
495 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
499 remove_process (proc
)
500 register Lisp_Object proc
;
502 register Lisp_Object pair
;
504 pair
= Frassq (proc
, Vprocess_alist
);
505 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
506 Fset_marker (XPROCESS (proc
)->mark
, Qnil
, Qnil
);
508 deactivate_process (proc
);
511 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
512 "Return t if OBJECT is a process.")
516 return XTYPE (obj
) == Lisp_Process
? Qt
: Qnil
;
519 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
520 "Return the process named NAME, or nil if there is none.")
522 register Lisp_Object name
;
524 if (XTYPE (name
) == Lisp_Process
)
526 CHECK_STRING (name
, 0);
527 return Fcdr (Fassoc (name
, Vprocess_alist
));
530 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
531 "Return the (or, a) process associated with BUFFER.\n\
532 BUFFER may be a buffer or the name of one.")
534 register Lisp_Object name
;
536 register Lisp_Object buf
, tail
, proc
;
538 if (NILP (name
)) return Qnil
;
539 buf
= Fget_buffer (name
);
540 if (NILP (buf
)) return Qnil
;
542 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
544 proc
= Fcdr (Fcar (tail
));
545 if (XTYPE (proc
) == Lisp_Process
&& EQ (XPROCESS (proc
)->buffer
, buf
))
551 /* This is how commands for the user decode process arguments. It
552 accepts a process, a process name, a buffer, a buffer name, or nil.
553 Buffers denote the first process in the buffer, and nil denotes the
558 register Lisp_Object name
;
560 register Lisp_Object proc
, obj
;
563 obj
= Fget_process (name
);
565 obj
= Fget_buffer (name
);
567 error ("Process %s does not exist", XSTRING (name
)->data
);
569 else if (NILP (name
))
570 obj
= Fcurrent_buffer ();
574 /* Now obj should be either a buffer object or a process object.
578 proc
= Fget_buffer_process (obj
);
580 error ("Buffer %s has no process", XSTRING (XBUFFER (obj
)->name
)->data
);
584 CHECK_PROCESS (obj
, 0);
590 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
591 "Delete PROCESS: kill it and forget about it immediately.\n\
592 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
593 nil, indicating the current buffer's process.")
595 register Lisp_Object proc
;
597 proc
= get_process (proc
);
598 XPROCESS (proc
)->raw_status_low
= Qnil
;
599 XPROCESS (proc
)->raw_status_high
= Qnil
;
600 if (NETCONN_P (proc
))
602 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
603 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
605 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
607 Fkill_process (proc
, Qnil
);
608 /* Do this now, since remove_process will make sigchld_handler do nothing. */
609 XPROCESS (proc
)->status
610 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
611 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
614 remove_process (proc
);
618 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
619 "Return the status of PROCESS: a symbol, one of these:\n\
620 run -- for a process that is running.\n\
621 stop -- for a process stopped but continuable.\n\
622 exit -- for a process that has exited.\n\
623 signal -- for a process that has got a fatal signal.\n\
624 open -- for a network stream connection that is open.\n\
625 closed -- for a network stream connection that is closed.\n\
626 nil -- if arg is a process name and no such process exists.\n\
627 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
628 nil, indicating the current buffer's process.")
630 register Lisp_Object proc
;
632 register struct Lisp_Process
*p
;
633 register Lisp_Object status
;
636 proc
= Fget_process (proc
);
638 proc
= get_process (proc
);
644 if (!NILP (p
->raw_status_low
))
647 if (XTYPE (status
) == Lisp_Cons
)
648 status
= XCONS (status
)->car
;
649 if (NETCONN_P (proc
))
651 if (EQ (status
, Qrun
))
653 else if (EQ (status
, Qexit
))
659 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
661 "Return the exit status of PROCESS or the signal number that killed it.\n\
662 If PROCESS has not yet exited or died, return 0.")
664 register Lisp_Object proc
;
666 CHECK_PROCESS (proc
, 0);
667 if (!NILP (XPROCESS (proc
)->raw_status_low
))
668 update_status (XPROCESS (proc
));
669 if (XTYPE (XPROCESS (proc
)->status
) == Lisp_Cons
)
670 return XCONS (XCONS (XPROCESS (proc
)->status
)->cdr
)->car
;
671 return make_number (0);
674 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
675 "Return the process id of PROCESS.\n\
676 This is the pid of the Unix process which PROCESS uses or talks to.\n\
677 For a network connection, this value is nil.")
679 register Lisp_Object proc
;
681 CHECK_PROCESS (proc
, 0);
682 return XPROCESS (proc
)->pid
;
685 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
686 "Return the name of PROCESS, as a string.\n\
687 This is the name of the program invoked in PROCESS,\n\
688 possibly modified to make it unique among process names.")
690 register Lisp_Object proc
;
692 CHECK_PROCESS (proc
, 0);
693 return XPROCESS (proc
)->name
;
696 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
697 "Return the command that was executed to start PROCESS.\n\
698 This is a list of strings, the first string being the program executed\n\
699 and the rest of the strings being the arguments given to it.\n\
700 For a non-child channel, this is nil.")
702 register Lisp_Object proc
;
704 CHECK_PROCESS (proc
, 0);
705 return XPROCESS (proc
)->command
;
708 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
710 "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).")
712 register Lisp_Object proc
, buffer
;
714 CHECK_PROCESS (proc
, 0);
716 CHECK_BUFFER (buffer
, 1);
717 XPROCESS (proc
)->buffer
= buffer
;
721 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
723 "Return the buffer PROCESS is associated with.\n\
724 Output from PROCESS is inserted in this buffer\n\
725 unless PROCESS has a filter.")
727 register Lisp_Object proc
;
729 CHECK_PROCESS (proc
, 0);
730 return XPROCESS (proc
)->buffer
;
733 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
735 "Return the marker for the end of the last output from PROCESS.")
737 register Lisp_Object proc
;
739 CHECK_PROCESS (proc
, 0);
740 return XPROCESS (proc
)->mark
;
743 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
745 "Give PROCESS the filter function FILTER; nil means no filter.\n\
746 t means stop accepting output from the process.\n\
747 When a process has a filter, each time it does output\n\
748 the entire string of output is passed to the filter.\n\
749 The filter gets two arguments: the process and the string of output.\n\
750 If the process has a filter, its buffer is not used for output.")
752 register Lisp_Object proc
, filter
;
754 CHECK_PROCESS (proc
, 0);
756 FD_CLR (XINT (XPROCESS (proc
)->infd
), &input_wait_mask
);
757 else if (EQ (XPROCESS (proc
)->filter
, Qt
))
758 FD_SET (XINT (XPROCESS (proc
)->infd
), &input_wait_mask
);
759 XPROCESS (proc
)->filter
= filter
;
763 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
765 "Returns the filter function of PROCESS; nil if none.\n\
766 See `set-process-filter' for more info on filter functions.")
768 register Lisp_Object proc
;
770 CHECK_PROCESS (proc
, 0);
771 return XPROCESS (proc
)->filter
;
774 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
776 "Give PROCESS the sentinel SENTINEL; nil for none.\n\
777 The sentinel is called as a function when the process changes state.\n\
778 It gets two arguments: the process, and a string describing the change.")
780 register Lisp_Object proc
, sentinel
;
782 CHECK_PROCESS (proc
, 0);
783 XPROCESS (proc
)->sentinel
= sentinel
;
787 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
789 "Return the sentinel of PROCESS; nil if none.\n\
790 See `set-process-sentinel' for more info on sentinels.")
792 register Lisp_Object proc
;
794 CHECK_PROCESS (proc
, 0);
795 return XPROCESS (proc
)->sentinel
;
798 DEFUN ("set-process-window-size", Fset_process_window_size
,
799 Sset_process_window_size
, 3, 3, 0,
800 "Tell PROCESS that it has logical window size HEIGHT and WIDTH.")
801 (proc
, height
, width
)
802 register Lisp_Object proc
, height
, width
;
804 CHECK_PROCESS (proc
, 0);
805 CHECK_NATNUM (height
, 0);
806 CHECK_NATNUM (width
, 0);
807 if (set_window_size (XINT (XPROCESS (proc
)->infd
),
808 XINT (height
), XINT(width
)) <= 0)
814 DEFUN ("process-kill-without-query", Fprocess_kill_without_query
,
815 Sprocess_kill_without_query
, 1, 2, 0,
816 "Say no query needed if PROCESS is running when Emacs is exited.\n\
817 Optional second argument if non-nil says to require a query.\n\
818 Value is t if a query was formerly required.")
820 register Lisp_Object proc
, value
;
824 CHECK_PROCESS (proc
, 0);
825 tem
= XPROCESS (proc
)->kill_without_query
;
826 XPROCESS (proc
)->kill_without_query
= Fnull (value
);
831 #if 0 /* Turned off because we don't currently record this info
832 in the process. Perhaps add it. */
833 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
834 "Return the connection type of `PROCESS'.\n\
835 The value is `nil' for a pipe,\n\
836 `t' or `pty' for a pty, or `stream' for a socket connection.")
840 return XPROCESS (process
)->type
;
847 register Lisp_Object tail
, tem
;
848 Lisp_Object proc
, minspace
, tem1
;
849 register struct buffer
*old
= current_buffer
;
850 register struct Lisp_Process
*p
;
854 XFASTINT (minspace
) = 1;
856 set_buffer_internal (XBUFFER (Vstandard_output
));
857 Fbuffer_disable_undo (Vstandard_output
);
859 current_buffer
->truncate_lines
= Qt
;
862 Proc Status Buffer Command\n\
863 ---- ------ ------ -------\n", -1);
865 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
869 proc
= Fcdr (Fcar (tail
));
871 if (NILP (p
->childp
))
874 Finsert (1, &p
->name
);
875 Findent_to (make_number (13), minspace
);
877 if (!NILP (p
->raw_status_low
))
880 if (XTYPE (p
->status
) == Lisp_Cons
)
881 symbol
= XCONS (p
->status
)->car
;
884 if (EQ (symbol
, Qsignal
))
887 tem
= Fcar (Fcdr (p
->status
));
889 if (XINT (tem
) < NSIG
)
890 write_string (sys_errlist
[XINT (tem
)], -1);
893 Fprinc (symbol
, Qnil
);
895 else if (NETCONN_P (proc
))
897 if (EQ (symbol
, Qrun
))
898 write_string ("open", -1);
899 else if (EQ (symbol
, Qexit
))
900 write_string ("closed", -1);
902 Fprinc (symbol
, Qnil
);
905 Fprinc (symbol
, Qnil
);
907 if (EQ (symbol
, Qexit
))
910 tem
= Fcar (Fcdr (p
->status
));
913 sprintf (tembuf
, " %d", XFASTINT (tem
));
914 write_string (tembuf
, -1);
918 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
919 remove_process (proc
);
921 Findent_to (make_number (22), minspace
);
922 if (NILP (p
->buffer
))
923 insert_string ("(none)");
924 else if (NILP (XBUFFER (p
->buffer
)->name
))
925 insert_string ("(Killed)");
927 Finsert (1, &XBUFFER (p
->buffer
)->name
);
929 Findent_to (make_number (37), minspace
);
931 if (NETCONN_P (proc
))
933 sprintf (tembuf
, "(network stream connection to %s)\n",
934 XSTRING (p
->childp
)->data
);
935 insert_string (tembuf
);
949 insert_string ("\n");
955 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 0, "",
956 "Display a list of all processes.\n\
957 \(Any processes listed as Exited or Signaled are actually eliminated\n\
958 after the listing is made.)")
961 internal_with_output_to_temp_buffer ("*Process List*",
962 list_processes_1
, Qnil
);
966 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
967 "Return a list of all processes.")
970 return Fmapcar (Qcdr
, Vprocess_alist
);
973 /* Starting asynchronous inferior processes. */
975 static Lisp_Object
start_process_unwind ();
977 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
978 "Start a program in a subprocess. Return the process object for it.\n\
979 Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\
980 NAME is name for process. It is modified if necessary to make it unique.\n\
981 BUFFER is the buffer or (buffer-name) to associate with the process.\n\
982 Process output goes at end of that buffer, unless you specify\n\
983 an output stream or filter function to handle the output.\n\
984 BUFFER may be also nil, meaning that this process is not associated\n\
986 Third arg is program file name. It is searched for as in the shell.\n\
987 Remaining arguments are strings to give program as arguments.")
990 register Lisp_Object
*args
;
992 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
994 register unsigned char *new_argv
;
997 register unsigned char **new_argv
;
1000 int count
= specpdl_ptr
- specpdl
;
1004 buffer
= Fget_buffer_create (buffer
);
1006 /* Make sure that the child will be able to chdir to the current
1007 buffer's current directory, or its unhandled equivalent. We
1008 can't just have the child check for an error when it does the
1009 chdir, since it's in a vfork.
1011 We have to GCPRO around this because Fexpand_file_name and
1012 Funhandled_file_name_directory might call a file name handling
1013 function. The argument list is protected by the caller, so all
1014 we really have to worry about is buffer. */
1016 struct gcpro gcpro1
, gcpro2
;
1018 current_dir
= current_buffer
->directory
;
1020 GCPRO2 (buffer
, current_dir
);
1023 expand_and_dir_to_file
1024 (Funhandled_file_name_directory (current_dir
), Qnil
);
1025 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1026 report_file_error ("Setting current directory",
1027 Fcons (current_buffer
->directory
, Qnil
));
1033 CHECK_STRING (name
, 0);
1037 CHECK_STRING (program
, 2);
1040 /* Make a one member argv with all args concatenated
1041 together separated by a blank. */
1042 len
= XSTRING (program
)->size
+ 2;
1043 for (i
= 3; i
< nargs
; i
++)
1046 CHECK_STRING (tem
, i
);
1047 len
+= XSTRING (tem
)->size
+ 1; /* count the blank */
1049 new_argv
= (unsigned char *) alloca (len
);
1050 strcpy (new_argv
, XSTRING (program
)->data
);
1051 for (i
= 3; i
< nargs
; i
++)
1054 CHECK_STRING (tem
, i
);
1055 strcat (new_argv
, " ");
1056 strcat (new_argv
, XSTRING (tem
)->data
);
1058 /* Need to add code here to check for program existence on VMS */
1061 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1063 /* If program file name is not absolute, search our path for it */
1064 if (XSTRING (program
)->data
[0] != '/')
1066 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1069 GCPRO4 (name
, program
, buffer
, current_dir
);
1070 openp (Vexec_path
, program
, EXEC_SUFFIXES
, &tem
, 1);
1073 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1074 new_argv
[0] = XSTRING (tem
)->data
;
1077 new_argv
[0] = XSTRING (program
)->data
;
1079 for (i
= 3; i
< nargs
; i
++)
1082 CHECK_STRING (tem
, i
);
1083 new_argv
[i
- 2] = XSTRING (tem
)->data
;
1085 new_argv
[i
- 2] = 0;
1086 #endif /* not VMS */
1088 proc
= make_process (name
);
1089 /* If an error occurs and we can't start the process, we want to
1090 remove it from the process list. This means that each error
1091 check in create_process doesn't need to call remove_process
1092 itself; it's all taken care of here. */
1093 record_unwind_protect (start_process_unwind
, proc
);
1095 XPROCESS (proc
)->childp
= Qt
;
1096 XPROCESS (proc
)->command_channel_p
= Qnil
;
1097 XPROCESS (proc
)->buffer
= buffer
;
1098 XPROCESS (proc
)->sentinel
= Qnil
;
1099 XPROCESS (proc
)->filter
= Qnil
;
1100 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1102 create_process (proc
, new_argv
, current_dir
);
1104 return unbind_to (count
, proc
);
1107 /* This function is the unwind_protect form for Fstart_process. If
1108 PROC doesn't have its pid set, then we know someone has signalled
1109 an error and the process wasn't started successfully, so we should
1110 remove it from the process list. */
1112 start_process_unwind (proc
)
1115 if (XTYPE (proc
) != Lisp_Process
)
1118 /* Was PROC started successfully? */
1119 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1120 remove_process (proc
);
1127 create_process_1 (signo
)
1131 /* USG systems forget handlers when they are used;
1132 must reestablish each time */
1133 signal (signo
, create_process_1
);
1137 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1140 /* Mimic blocking of signals on system V, which doesn't really have it. */
1142 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1143 int sigchld_deferred
;
1146 create_process_sigchld ()
1148 signal (SIGCHLD
, create_process_sigchld
);
1150 sigchld_deferred
= 1;
1156 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1157 create_process (process
, new_argv
, current_dir
)
1158 Lisp_Object process
;
1160 Lisp_Object current_dir
;
1162 int pid
, inchannel
, outchannel
, forkin
, forkout
;
1165 SIGTYPE (*sigchld
)();
1168 extern char **environ
;
1170 inchannel
= outchannel
= -1;
1173 if (!NILP (Vprocess_connection_type
))
1174 outchannel
= inchannel
= allocate_pty ();
1179 /* On USG systems it does not work to open the pty's tty here
1180 and then close and reopen it in the child. */
1182 /* Don't let this terminal become our controlling terminal
1183 (in case we don't have one). */
1184 forkout
= forkin
= open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1186 forkout
= forkin
= open (pty_name
, O_RDWR
, 0);
1189 report_file_error ("Opening pty", Qnil
);
1191 forkin
= forkout
= -1;
1192 #endif /* not USG */
1196 #endif /* HAVE_PTYS */
1199 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1200 report_file_error ("Opening socketpair", Qnil
);
1201 outchannel
= inchannel
= sv
[0];
1202 forkout
= forkin
= sv
[1];
1204 #else /* not SKTPAIR */
1213 #endif /* not SKTPAIR */
1216 /* Replaced by close_process_descs */
1217 set_exclusive_use (inchannel
);
1218 set_exclusive_use (outchannel
);
1221 /* Stride people say it's a mystery why this is needed
1222 as well as the O_NDELAY, but that it fails without this. */
1223 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1226 ioctl (inchannel
, FIONBIO
, &one
);
1231 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1234 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1238 /* Record this as an active process, with its channels.
1239 As a result, child_setup will close Emacs's side of the pipes. */
1240 chan_process
[inchannel
] = process
;
1241 XSET (XPROCESS (process
)->infd
, Lisp_Int
, inchannel
);
1242 XSET (XPROCESS (process
)->outfd
, Lisp_Int
, outchannel
);
1243 /* Record the tty descriptor used in the subprocess. */
1245 XPROCESS (process
)->subtty
= Qnil
;
1247 XFASTINT (XPROCESS (process
)->subtty
) = forkin
;
1248 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1249 XPROCESS (process
)->status
= Qrun
;
1251 /* Delay interrupts until we have a chance to store
1252 the new fork's pid in its process structure */
1256 #else /* not BSD4_1 */
1257 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1258 sigsetmask (sigmask (SIGCHLD
));
1259 #else /* ordinary USG */
1261 sigchld_deferred
= 0;
1262 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1264 #endif /* ordinary USG */
1265 #endif /* not BSD4_1 */
1266 #endif /* SIGCHLD */
1268 FD_SET (inchannel
, &input_wait_mask
);
1269 if (inchannel
> max_process_desc
)
1270 max_process_desc
= inchannel
;
1272 /* Until we store the proper pid, enable sigchld_handler
1273 to recognize an unknown pid as standing for this process.
1274 It is very important not to let this `marker' value stay
1275 in the table after this function has returned; if it does
1276 it might cause call-process to hang and subsequent asynchronous
1277 processes to get their return values scrambled. */
1278 XSETINT (XPROCESS (process
)->pid
, -1);
1281 /* child_setup must clobber environ on systems with true vfork.
1282 Protect it from permanent change. */
1283 char **save_environ
= environ
;
1288 int xforkin
= forkin
;
1289 int xforkout
= forkout
;
1291 #if 0 /* This was probably a mistake--it duplicates code later on,
1292 but fails to handle all the cases. */
1293 /* Make sure SIGCHLD is not blocked in the child. */
1294 sigsetmask (SIGEMPTYMASK
);
1297 /* Make the pty be the controlling terminal of the process. */
1299 /* First, disconnect its current controlling terminal. */
1301 /* We tried doing setsid only if pty_flag, but it caused
1302 process_set_signal to fail on SGI when using a pipe. */
1304 /* Make the pty's terminal the controlling terminal. */
1308 /* We ignore the return value
1309 because faith@cs.unc.edu says that is necessary on Linux. */
1310 ioctl (xforkin
, TIOCSCTTY
, 0);
1313 #else /* not HAVE_SETSID */
1315 /* It's very important to call setpgrp here and no time
1316 afterwards. Otherwise, we lose our controlling tty which
1317 is set when we open the pty. */
1320 #endif /* not HAVE_SETSID */
1321 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1322 if (pty_flag
&& xforkin
>= 0)
1325 tcgetattr (xforkin
, &t
);
1327 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1328 write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1331 #if defined (NTTYDISC) && defined (TIOCSETD)
1332 if (pty_flag
&& xforkin
>= 0)
1334 /* Use new line discipline. */
1335 int ldisc
= NTTYDISC
;
1336 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1341 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1342 can do TIOCSPGRP only to the process's controlling tty. */
1345 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1346 I can't test it since I don't have 4.3. */
1347 int j
= open ("/dev/tty", O_RDWR
, 0);
1348 ioctl (j
, TIOCNOTTY
, 0);
1351 /* In order to get a controlling terminal on some versions
1352 of BSD, it is necessary to put the process in pgrp 0
1353 before it opens the terminal. */
1357 #endif /* TIOCNOTTY */
1359 #if !defined (RTU) && !defined (UNIPLUS)
1360 /*** There is a suggestion that this ought to be a
1361 conditional on TIOCSPGRP. */
1362 /* Now close the pty (if we had it open) and reopen it.
1363 This makes the pty the controlling terminal of the subprocess. */
1366 #ifdef SET_CHILD_PTY_PGRP
1367 int pgrp
= getpid ();
1370 /* I wonder if close (open (pty_name, ...)) would work? */
1373 xforkout
= xforkin
= open (pty_name
, O_RDWR
, 0);
1375 #ifdef SET_CHILD_PTY_PGRP
1376 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1377 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1383 #endif /* not UNIPLUS and not RTU */
1384 #ifdef SETUP_SLAVE_PTY
1389 #endif /* SETUP_SLAVE_PTY */
1391 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1392 Now reenable it in the child, so it will die when we want it to. */
1394 signal (SIGHUP
, SIG_DFL
);
1396 #endif /* HAVE_PTYS */
1401 #else /* not BSD4_1 */
1402 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1403 sigsetmask (SIGEMPTYMASK
);
1404 #else /* ordinary USG */
1406 signal (SIGCHLD
, sigchld
);
1408 #endif /* ordinary USG */
1409 #endif /* not BSD4_1 */
1410 #endif /* SIGCHLD */
1413 child_setup_tty (xforkout
);
1414 child_setup (xforkin
, xforkout
, xforkout
,
1415 new_argv
, 1, current_dir
);
1417 environ
= save_environ
;
1424 if (forkin
!= forkout
&& forkout
>= 0)
1426 report_file_error ("Doing vfork", Qnil
);
1429 XFASTINT (XPROCESS (process
)->pid
) = pid
;
1431 /* If the subfork execv fails, and it exits,
1432 this close hangs. I don't know why.
1433 So have an interrupt jar it loose. */
1435 signal (SIGALRM
, create_process_1
);
1437 XPROCESS (process
)->subtty
= Qnil
;
1442 if (forkin
!= forkout
&& forkout
>= 0)
1448 #else /* not BSD4_1 */
1449 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1450 sigsetmask (SIGEMPTYMASK
);
1451 #else /* ordinary USG */
1453 signal (SIGCHLD
, sigchld
);
1454 /* Now really handle any of these signals
1455 that came in during this function. */
1456 if (sigchld_deferred
)
1457 kill (getpid (), SIGCHLD
);
1459 #endif /* ordinary USG */
1460 #endif /* not BSD4_1 */
1461 #endif /* SIGCHLD */
1463 #endif /* not VMS */
1467 /* open a TCP network connection to a given HOST/SERVICE. Treated
1468 exactly like a normal process when reading and writing. Only
1469 differences are in status display and process deletion. A network
1470 connection has no PID; you cannot signal it. All you can do is
1471 deactivate and close it via delete-process */
1473 DEFUN ("open-network-stream", Fopen_network_stream
, Sopen_network_stream
,
1475 "Open a TCP connection for a service to a host.\n\
1476 Returns a subprocess-object to represent the connection.\n\
1477 Input and output work as for subprocesses; `delete-process' closes it.\n\
1478 Args are NAME BUFFER HOST SERVICE.\n\
1479 NAME is name for process. It is modified if necessary to make it unique.\n\
1480 BUFFER is the buffer (or buffer-name) to associate with the process.\n\
1481 Process output goes at end of that buffer, unless you specify\n\
1482 an output stream or filter function to handle the output.\n\
1483 BUFFER may be also nil, meaning that this process is not associated\n\
1485 Third arg is name of the host to connect to, or its IP address.\n\
1486 Fourth arg SERVICE is name of the service desired, or an integer\n\
1487 specifying a port number to connect to.")
1488 (name
, buffer
, host
, service
)
1489 Lisp_Object name
, buffer
, host
, service
;
1493 struct sockaddr_in address
;
1494 struct servent
*svc_info
;
1495 struct hostent
*host_info_ptr
, host_info
;
1496 char *(addr_list
[2]);
1497 IN_ADDR numeric_addr
;
1501 struct hostent host_info_fixed
;
1502 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1504 int count
= specpdl_ptr
- specpdl
;
1506 GCPRO4 (name
, buffer
, host
, service
);
1507 CHECK_STRING (name
, 0);
1508 CHECK_STRING (host
, 0);
1509 if (XTYPE (service
) == Lisp_Int
)
1510 port
= htons ((unsigned short) XINT (service
));
1513 CHECK_STRING (service
, 0);
1514 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
1516 error ("Unknown service \"%s\"", XSTRING (service
)->data
);
1517 port
= svc_info
->s_port
;
1526 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
1528 if (! (host_info_ptr
== 0 && h_errno
== TRY_AGAIN
))
1531 Fsleep_for (make_number (1), Qnil
);
1533 if (host_info_ptr
== 0)
1534 /* Attempt to interpret host as numeric inet address */
1536 numeric_addr
= inet_addr ((char *) XSTRING (host
)->data
);
1537 if (NUMERIC_ADDR_ERROR
)
1538 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
1540 host_info_ptr
= &host_info
;
1541 host_info
.h_name
= 0;
1542 host_info
.h_aliases
= 0;
1543 host_info
.h_addrtype
= AF_INET
;
1545 /* Older machines have only one address slot called h_addr.
1546 Newer machines have h_addr_list, but #define h_addr to
1547 be its first element. */
1548 host_info
.h_addr_list
= &(addr_list
[0]);
1550 host_info
.h_addr
= (char*)(&numeric_addr
);
1552 host_info
.h_length
= strlen (addr_list
[0]);
1555 bzero (&address
, sizeof address
);
1556 bcopy (host_info_ptr
->h_addr
, (char *) &address
.sin_addr
,
1557 host_info_ptr
->h_length
);
1558 address
.sin_family
= host_info_ptr
->h_addrtype
;
1559 address
.sin_port
= port
;
1561 s
= socket (host_info_ptr
->h_addrtype
, SOCK_STREAM
, 0);
1563 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1565 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
1566 when connect is interrupted. So let's not let it get interrupted.
1567 Note we do not turn off polling, because polling is only used
1568 when not interrupt_input, and thus not normally used on the systems
1569 which have this bug. On systems which use polling, there's no way
1570 to quit if polling is turned off. */
1571 if (interrupt_input
)
1574 /* Slow down polling to every ten seconds.
1575 Some kernels have a bug which causes retrying connect to fail
1577 #ifdef POLL_FOR_INPUT
1578 bind_polling_period (10);
1582 if (connect (s
, (struct sockaddr
*) &address
, sizeof address
) == -1
1583 && errno
!= EISCONN
)
1589 if (errno
== EADDRINUSE
&& retry
< 20)
1597 if (interrupt_input
)
1601 report_file_error ("connection failed",
1602 Fcons (host
, Fcons (name
, Qnil
)));
1605 #ifdef POLL_FOR_INPUT
1606 unbind_to (count
, Qnil
);
1609 if (interrupt_input
)
1613 s
= connect_server (0);
1615 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1616 send_command (s
, C_PORT
, 0, "%s:%d", XSTRING (host
)->data
, ntohs (port
));
1617 send_command (s
, C_DUMB
, 1, 0);
1623 report_file_error ("error duplicating socket", Fcons (name
, Qnil
));
1626 buffer
= Fget_buffer_create (buffer
);
1627 proc
= make_process (name
);
1629 chan_process
[inch
] = proc
;
1632 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
1635 fcntl (inch
, F_SETFL
, O_NDELAY
);
1639 XPROCESS (proc
)->childp
= host
;
1640 XPROCESS (proc
)->command_channel_p
= Qnil
;
1641 XPROCESS (proc
)->buffer
= buffer
;
1642 XPROCESS (proc
)->sentinel
= Qnil
;
1643 XPROCESS (proc
)->filter
= Qnil
;
1644 XPROCESS (proc
)->command
= Qnil
;
1645 XPROCESS (proc
)->pid
= Qnil
;
1646 XSET (XPROCESS (proc
)->infd
, Lisp_Int
, s
);
1647 XSET (XPROCESS (proc
)->outfd
, Lisp_Int
, outch
);
1648 XPROCESS (proc
)->status
= Qrun
;
1649 FD_SET (inch
, &input_wait_mask
);
1650 if (inch
> max_process_desc
)
1651 max_process_desc
= inch
;
1656 #endif /* HAVE_SOCKETS */
1658 deactivate_process (proc
)
1661 register int inchannel
, outchannel
;
1662 register struct Lisp_Process
*p
= XPROCESS (proc
);
1664 inchannel
= XINT (p
->infd
);
1665 outchannel
= XINT (p
->outfd
);
1669 /* Beware SIGCHLD hereabouts. */
1670 flush_pending_output (inchannel
);
1673 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
1674 sys$
dassgn (outchannel
);
1675 vs
= get_vms_process_pointer (p
->pid
);
1677 give_back_vms_process_stuff (vs
);
1681 if (outchannel
>= 0 && outchannel
!= inchannel
)
1685 XSET (p
->infd
, Lisp_Int
, -1);
1686 XSET (p
->outfd
, Lisp_Int
, -1);
1687 chan_process
[inchannel
] = Qnil
;
1688 FD_CLR (inchannel
, &input_wait_mask
);
1689 if (inchannel
== max_process_desc
)
1692 /* We just closed the highest-numbered process input descriptor,
1693 so recompute the highest-numbered one now. */
1694 max_process_desc
= 0;
1695 for (i
= 0; i
< MAXDESC
; i
++)
1696 if (!NILP (chan_process
[i
]))
1697 max_process_desc
= i
;
1702 /* Close all descriptors currently in use for communication
1703 with subprocess. This is used in a newly-forked subprocess
1704 to get rid of irrelevant descriptors. */
1706 close_process_descs ()
1709 for (i
= 0; i
< MAXDESC
; i
++)
1711 Lisp_Object process
;
1712 process
= chan_process
[i
];
1713 if (!NILP (process
))
1715 int in
= XINT (XPROCESS (process
)->infd
);
1716 int out
= XINT (XPROCESS (process
)->outfd
);
1719 if (out
>= 0 && in
!= out
)
1725 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
1727 "Allow any pending output from subprocesses to be read by Emacs.\n\
1728 It is read into the process' buffers or given to their filter functions.\n\
1729 Non-nil arg PROCESS means do not return until some output has been received\n\
1731 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
1732 seconds and microseconds to wait; return after that much time whether\n\
1733 or not there is input.\n\
1734 Return non-nil iff we received any output before the timeout expired.")
1735 (proc
, timeout
, timeout_msecs
)
1736 register Lisp_Object proc
, timeout
, timeout_msecs
;
1741 if (! NILP (timeout_msecs
))
1743 CHECK_NUMBER (timeout_msecs
, 2);
1744 useconds
= XINT (timeout_msecs
);
1745 if (XTYPE (timeout
) != Lisp_Int
)
1746 XSET (timeout
, Lisp_Int
, 0);
1749 int carry
= useconds
/ 1000000;
1751 XSETINT (timeout
, XINT (timeout
) + carry
);
1752 useconds
-= carry
* 1000000;
1754 /* I think this clause is necessary because C doesn't
1755 guarantee a particular rounding direction for negative
1759 XSETINT (timeout
, XINT (timeout
) - 1);
1760 useconds
+= 1000000;
1767 if (! NILP (timeout
))
1769 CHECK_NUMBER (timeout
, 1);
1770 seconds
= XINT (timeout
);
1783 XFASTINT (proc
) = 0;
1786 (wait_reading_process_input (seconds
, useconds
, proc
, 0)
1790 /* This variable is different from waiting_for_input in keyboard.c.
1791 It is used to communicate to a lisp process-filter/sentinel (via the
1792 function Fwaiting_for_user_input_p below) whether emacs was waiting
1793 for user-input when that process-filter was called.
1794 waiting_for_input cannot be used as that is by definition 0 when
1795 lisp code is being evalled */
1796 static int waiting_for_user_input_p
;
1798 /* Read and dispose of subprocess output while waiting for timeout to
1799 elapse and/or keyboard input to be available.
1802 timeout in seconds, or
1803 zero for no limit, or
1804 -1 means gobble data immediately available but don't wait for any.
1807 an additional duration to wait, measured in microseconds.
1808 If this is nonzero and time_limit is 0, then the timeout
1809 consists of MICROSECS only.
1811 READ_KBD is a lisp value:
1812 0 to ignore keyboard input, or
1813 1 to return when input is available, or
1814 -1 meaning caller will actually read the input, so don't throw to
1815 the quit handler, or
1816 a cons cell, meaning wait until its car is non-nil
1817 (and gobble terminal input into the buffer if any arrives), or
1818 a process object, meaning wait until something arrives from that
1819 process. The return value is true iff we read some input from
1822 DO_DISPLAY != 0 means redisplay should be done to show subprocess
1823 output that arrives.
1825 If READ_KBD is a pointer to a struct Lisp_Process, then the
1826 function returns true iff we received input from that process
1827 before the timeout elapsed.
1828 Otherwise, return true iff we received input from any process. */
1830 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
1831 int time_limit
, microsecs
;
1832 Lisp_Object read_kbd
;
1835 register int channel
, nfds
, m
;
1836 static SELECT_TYPE Available
;
1839 EMACS_TIME timeout
, end_time
, garbage
;
1841 int wait_channel
= -1;
1842 struct Lisp_Process
*wait_proc
= 0;
1843 int got_some_input
= 0;
1844 Lisp_Object
*wait_for_cell
= 0;
1846 FD_ZERO (&Available
);
1848 /* If read_kbd is a process to watch, set wait_proc and wait_channel
1850 if (XTYPE (read_kbd
) == Lisp_Process
)
1852 wait_proc
= XPROCESS (read_kbd
);
1853 wait_channel
= XINT (wait_proc
->infd
);
1854 XFASTINT (read_kbd
) = 0;
1857 /* If waiting for non-nil in a cell, record where. */
1858 if (XTYPE (read_kbd
) == Lisp_Cons
)
1860 wait_for_cell
= &XCONS (read_kbd
)->car
;
1861 XFASTINT (read_kbd
) = 0;
1864 waiting_for_user_input_p
= XINT (read_kbd
);
1866 /* Since we may need to wait several times,
1867 compute the absolute time to return at. */
1868 if (time_limit
|| microsecs
)
1870 EMACS_GET_TIME (end_time
);
1871 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
1872 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
1875 /* It would not be safe to call this below,
1876 where we call redisplay_preserve_echo_area. */
1877 if (do_display
&& frame_garbaged
)
1878 prepare_menu_bars ();
1882 /* If calling from keyboard input, do not quit
1883 since we want to return C-g as an input character.
1884 Otherwise, do pending quit if requested. */
1885 if (XINT (read_kbd
) >= 0)
1888 /* Exit now if the cell we're waiting for became non-nil. */
1889 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
1892 /* Compute time from now till when time limit is up */
1893 /* Exit if already run out */
1894 if (time_limit
== -1)
1896 /* -1 specified for timeout means
1897 gobble output available now
1898 but don't wait at all. */
1900 EMACS_SET_SECS_USECS (timeout
, 0, 0);
1902 else if (time_limit
|| microsecs
)
1904 EMACS_GET_TIME (timeout
);
1905 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
1906 if (EMACS_TIME_NEG_P (timeout
))
1911 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
1914 /* Cause C-g and alarm signals to take immediate action,
1915 and cause input available signals to zero out timeout.
1917 It is important that we do this before checking for process
1918 activity. If we get a SIGCHLD after the explicit checks for
1919 process activity, timeout is the only way we will know. */
1920 if (XINT (read_kbd
) < 0)
1921 set_waiting_for_input (&timeout
);
1923 /* If status of something has changed, and no input is
1924 available, notify the user of the change right away. After
1925 this explicit check, we'll let the SIGCHLD handler zap
1926 timeout to get our attention. */
1927 if (update_tick
!= process_tick
&& do_display
)
1929 Atemp
= input_wait_mask
;
1930 EMACS_SET_SECS_USECS (timeout
, 0, 0);
1931 if (select (MAXDESC
, &Atemp
, 0, 0, &timeout
) <= 0)
1933 /* It's okay for us to do this and then continue with
1934 the loop, since timeout has already been zeroed out. */
1935 clear_waiting_for_input ();
1940 /* Don't wait for output from a non-running process. */
1941 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
1942 update_status (wait_proc
);
1944 && ! EQ (wait_proc
->status
, Qrun
))
1946 clear_waiting_for_input ();
1950 /* Wait till there is something to do */
1952 Available
= input_wait_mask
;
1953 /* We used to have && wait_for_cell == 0
1954 but that led to lossage handling selection_request events:
1955 within one, we would start to handle another. */
1956 if (! XINT (read_kbd
))
1957 FD_CLR (keyboard_descriptor
, &Available
);
1959 /* If frame size has changed or the window is newly mapped,
1960 redisplay now, before we start to wait. There is a race
1961 condition here; if a SIGIO arrives between now and the select
1962 and indicates that a frame is trashed, the select may block
1963 displaying a trashed screen. */
1964 if (frame_garbaged
&& do_display
)
1965 redisplay_preserve_echo_area ();
1967 if (XINT (read_kbd
) && detect_input_pending ())
1970 FD_ZERO (&Available
);
1973 nfds
= select (MAXDESC
, &Available
, 0, 0, &timeout
);
1977 /* Make C-g and alarm signals set flags again */
1978 clear_waiting_for_input ();
1980 /* If we woke up due to SIGWINCH, actually change size now. */
1981 do_pending_window_change ();
1983 if (time_limit
&& nfds
== 0) /* timeout elapsed */
1987 if (xerrno
== EINTR
)
1988 FD_ZERO (&Available
);
1990 /* Ultrix select seems to return ENOMEM when it is
1991 interrupted. Treat it just like EINTR. Bleah. Note
1992 that we want to test for the "ultrix" CPP symbol, not
1993 "__ultrix__"; the latter is only defined under GCC, but
1994 not by DEC's bundled CC. -JimB */
1995 else if (xerrno
== ENOMEM
)
1996 FD_ZERO (&Available
);
1999 /* This happens for no known reason on ALLIANT.
2000 I am guessing that this is the right response. -- RMS. */
2001 else if (xerrno
== EFAULT
)
2002 FD_ZERO (&Available
);
2004 else if (xerrno
== EBADF
)
2007 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
2008 the child's closure of the pts gives the parent a SIGHUP, and
2009 the ptc file descriptor is automatically closed,
2010 yielding EBADF here or at select() call above.
2011 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
2012 in m/ibmrt-aix.h), and here we just ignore the select error.
2013 Cleanup occurs c/o status_notify after SIGCLD. */
2014 FD_ZERO (&Available
); /* Cannot depend on values returned */
2020 error("select error: %s", strerror (xerrno
));
2022 #if defined(sun) && !defined(USG5_4)
2023 else if (nfds
> 0 && FD_ISSET (keyboard_descriptor
, &Available
)
2025 /* System sometimes fails to deliver SIGIO.
2027 David J. Mackenzie says that Emacs doesn't compile under
2028 Solaris if this code is enabled, thus the USG5_4 in the CPP
2029 conditional. "I haven't noticed any ill effects so far.
2030 If you find a Solaris expert somewhere, they might know
2032 kill (getpid (), SIGIO
);
2035 /* Check for keyboard input */
2036 /* If there is any, return immediately
2037 to give it higher priority than subprocesses */
2039 /* We used to do this if wait_for_cell,
2040 but that caused infinite recursion in selection request events. */
2041 if ((XINT (read_kbd
))
2042 && detect_input_pending ())
2045 if (detect_input_pending ())
2049 /* Exit now if the cell we're waiting for became non-nil. */
2050 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2054 /* If we think we have keyboard input waiting, but didn't get SIGIO
2055 go read it. This can happen with X on BSD after logging out.
2056 In that case, there really is no input and no SIGIO,
2057 but select says there is input. */
2059 if (XINT (read_kbd
) && interrupt_input
2060 && (FD_ISSET (keyboard_descriptor
, &Available
)))
2065 got_some_input
|= nfds
> 0;
2067 /* If checking input just got us a size-change event from X,
2068 obey it now if we should. */
2069 if (XINT (read_kbd
) || wait_for_cell
)
2070 do_pending_window_change ();
2072 /* Check for data from a process. */
2073 /* Really FIRST_PROC_DESC should be 0 on Unix,
2074 but this is safer in the short run. */
2075 for (channel
= keyboard_descriptor
== 0 ? FIRST_PROC_DESC
: 0;
2076 channel
<= max_process_desc
; channel
++)
2078 if (FD_ISSET (channel
, &Available
))
2082 /* If waiting for this channel, arrange to return as
2083 soon as no more input to be processed. No more
2085 if (wait_channel
== channel
)
2091 proc
= chan_process
[channel
];
2095 /* Read data from the process, starting with our
2096 buffered-ahead character if we have one. */
2098 nread
= read_process_output (proc
, channel
);
2101 /* Since read_process_output can run a filter,
2102 which can call accept-process-output,
2103 don't try to read from any other processes
2104 before doing the select again. */
2105 FD_ZERO (&Available
);
2108 redisplay_preserve_echo_area ();
2111 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2115 else if (nread
== -1 && errno
== EAGAIN
)
2119 else if (nread
== -1 && errno
== EAGAIN
)
2121 /* Note that we cannot distinguish between no input
2122 available now and a closed pipe.
2123 With luck, a closed pipe will be accompanied by
2124 subprocess termination and SIGCHLD. */
2125 else if (nread
== 0 && !NETCONN_P (proc
))
2127 #endif /* O_NDELAY */
2128 #endif /* O_NONBLOCK */
2129 #endif /* EWOULDBLOCK */
2131 /* On some OSs with ptys, when the process on one end of
2132 a pty exits, the other end gets an error reading with
2133 errno = EIO instead of getting an EOF (0 bytes read).
2134 Therefore, if we get an error reading and errno =
2135 EIO, just continue, because the child process has
2136 exited and should clean itself up soon (e.g. when we
2138 else if (nread
== -1 && errno
== EIO
)
2140 #endif /* HAVE_PTYS */
2141 /* If we can detect process termination, don't consider the process
2142 gone just because its pipe is closed. */
2144 else if (nread
== 0 && !NETCONN_P (proc
))
2149 /* Preserve status of processes already terminated. */
2150 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2151 deactivate_process (proc
);
2152 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2153 update_status (XPROCESS (proc
));
2154 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2155 XPROCESS (proc
)->status
2156 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2159 } /* end for each file descriptor */
2160 } /* end while exit conditions not met */
2162 /* If calling from keyboard input, do not quit
2163 since we want to return C-g as an input character.
2164 Otherwise, do pending quit if requested. */
2165 if (XINT (read_kbd
) >= 0)
2167 /* Prevent input_pending from remaining set if we quit. */
2168 clear_input_pending ();
2172 return got_some_input
;
2175 /* Read pending output from the process channel,
2176 starting with our buffered-ahead character if we have one.
2177 Yield number of characters read.
2179 This function reads at most 1024 characters.
2180 If you want to read all available subprocess output,
2181 you must call it repeatedly until it returns zero. */
2183 read_process_output (proc
, channel
)
2185 register int channel
;
2187 register int nchars
;
2193 register Lisp_Object outstream
;
2194 register struct buffer
*old
= current_buffer
;
2195 register struct Lisp_Process
*p
= XPROCESS (proc
);
2196 register int opoint
;
2199 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2201 vs
= get_vms_process_pointer (p
->pid
);
2205 return(0); /* Really weird if it does this */
2206 if (!(vs
->iosb
[0] & 1))
2207 return -1; /* I/O error */
2210 error ("Could not get VMS process pointer");
2211 chars
= vs
->inputBuffer
;
2212 nchars
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2215 start_vms_process_read (vs
); /* Crank up the next read on the process */
2216 return 1; /* Nothing worth printing, say we got 1 */
2220 if (proc_buffered_char
[channel
] < 0)
2221 nchars
= read (channel
, chars
, sizeof chars
);
2224 chars
[0] = proc_buffered_char
[channel
];
2225 proc_buffered_char
[channel
] = -1;
2226 nchars
= read (channel
, chars
+ 1, sizeof chars
- 1);
2230 nchars
= nchars
+ 1;
2232 #endif /* not VMS */
2234 if (nchars
<= 0) return nchars
;
2236 outstream
= p
->filter
;
2237 if (!NILP (outstream
))
2239 /* We inhibit quit here instead of just catching it so that
2240 hitting ^G when a filter happens to be running won't screw
2242 int count
= specpdl_ptr
- specpdl
;
2243 Lisp_Object odeactivate
;
2244 Lisp_Object obuffer
;
2246 odeactivate
= Vdeactivate_mark
;
2247 obuffer
= Fcurrent_buffer ();
2249 specbind (Qinhibit_quit
, Qt
);
2250 specbind (Qlast_nonmenu_event
, Qt
);
2251 call2 (outstream
, proc
, make_string (chars
, nchars
));
2253 /* Handling the process output should not deactivate the mark. */
2254 Vdeactivate_mark
= odeactivate
;
2256 if (! EQ (Fcurrent_buffer (), obuffer
))
2257 record_asynch_buffer_change ();
2259 if (waiting_for_user_input_p
)
2260 prepare_menu_bars ();
2263 start_vms_process_read (vs
);
2265 unbind_to (count
, Qnil
);
2269 /* If no filter, write into buffer if it isn't dead. */
2270 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2272 Lisp_Object old_read_only
;
2273 Lisp_Object old_begv
, old_zv
;
2274 Lisp_Object odeactivate
;
2276 odeactivate
= Vdeactivate_mark
;
2278 Fset_buffer (p
->buffer
);
2280 old_read_only
= current_buffer
->read_only
;
2281 XFASTINT (old_begv
) = BEGV
;
2282 XFASTINT (old_zv
) = ZV
;
2284 current_buffer
->read_only
= Qnil
;
2286 /* Insert new output into buffer
2287 at the current end-of-output marker,
2288 thus preserving logical ordering of input and output. */
2289 if (XMARKER (p
->mark
)->buffer
)
2290 SET_PT (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
));
2294 /* If the output marker is outside of the visible region, save
2295 the restriction and widen. */
2296 if (! (BEGV
<= point
&& point
<= ZV
))
2299 /* Make sure opoint floats ahead of any new text, just as point
2301 if (point
<= opoint
)
2304 /* Insert after old_begv, but before old_zv. */
2305 if (point
< XFASTINT (old_begv
))
2306 XFASTINT (old_begv
) += nchars
;
2307 if (point
<= XFASTINT (old_zv
))
2308 XFASTINT (old_zv
) += nchars
;
2310 /* Insert before markers in case we are inserting where
2311 the buffer's mark is, and the user's next command is Meta-y. */
2312 insert_before_markers (chars
, nchars
);
2313 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
2315 update_mode_lines
++;
2317 /* If the restriction isn't what it should be, set it. */
2318 if (XFASTINT (old_begv
) != BEGV
|| XFASTINT (old_zv
) != ZV
)
2319 Fnarrow_to_region (old_begv
, old_zv
);
2321 /* Handling the process output should not deactivate the mark. */
2322 Vdeactivate_mark
= odeactivate
;
2324 current_buffer
->read_only
= old_read_only
;
2326 set_buffer_internal (old
);
2329 start_vms_process_read (vs
);
2334 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
2336 "Returns non-nil if emacs is waiting for input from the user.\n\
2337 This is intended for use by asynchronous process output filters and sentinels.")
2340 return (waiting_for_user_input_p
? Qt
: Qnil
);
2343 /* Sending data to subprocess */
2345 jmp_buf send_process_frame
;
2348 send_process_trap ()
2354 longjmp (send_process_frame
, 1);
2357 /* Send some data to process PROC.
2358 BUF is the beginning of the data; LEN is the number of characters.
2359 OBJECT is the Lisp object that the data comes from. */
2361 send_process (proc
, buf
, len
, object
)
2367 /* Don't use register vars; longjmp can lose them. */
2369 unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
2372 struct Lisp_Process
*p
= XPROCESS (proc
);
2373 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2376 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2377 update_status (XPROCESS (proc
));
2378 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2379 error ("Process %s not running", procname
);
2382 vs
= get_vms_process_pointer (p
->pid
);
2384 error ("Could not find this process: %x", p
->pid
);
2385 else if (write_to_vms_process (vs
, buf
, len
))
2389 if (pty_max_bytes
== 0)
2391 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
2392 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
2394 if (pty_max_bytes
< 0)
2395 pty_max_bytes
= 250;
2397 pty_max_bytes
= 250;
2399 /* Deduct one, to leave space for the eof. */
2403 if (!setjmp (send_process_frame
))
2407 SIGTYPE (*old_sigpipe
)();
2410 /* Decide how much data we can send in one batch.
2411 Long lines need to be split into multiple batches. */
2412 if (!NILP (XPROCESS (proc
)->pty_flag
))
2414 /* Starting this at zero is always correct when not the first iteration
2415 because the previous iteration ended by sending C-d.
2416 It may not be correct for the first iteration
2417 if a partial line was sent in a separate send_process call.
2418 If that proves worth handling, we need to save linepos
2419 in the process object. */
2422 char *end
= buf
+ len
;
2424 /* Scan through this text for a line that is too long. */
2425 while (ptr
!= end
&& linepos
< pty_max_bytes
)
2433 /* If we found one, break the line there
2434 and put in a C-d to force the buffer through. */
2438 /* Send this batch, using one or more write calls. */
2441 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
2442 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
2443 signal (SIGPIPE
, old_sigpipe
);
2449 || errno
== EWOULDBLOCK
2455 /* Buffer is full. Wait, accepting input;
2456 that may allow the program
2457 to finish doing output and read more. */
2462 /* Running filters might relocate buffers or strings.
2463 Arrange to relocate BUF. */
2464 if (BUFFERP (object
))
2465 offset
= BUF_PTR_CHAR_POS (XBUFFER (object
),
2466 (unsigned char *) buf
);
2467 else if (STRINGP (object
))
2468 offset
= buf
- (char *) XSTRING (object
)->data
;
2470 XFASTINT (zero
) = 0;
2471 wait_reading_process_input (1, 0, zero
, 0);
2473 if (BUFFERP (object
))
2474 buf
= (char *) BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
2475 else if (STRINGP (object
))
2476 buf
= offset
+ (char *) XSTRING (object
)->data
;
2481 /* This is a real error. */
2482 report_file_error ("writing to process", Fcons (proc
, Qnil
));
2489 /* If we sent just part of the string, put in an EOF
2490 to force it through, before we send the rest. */
2492 Fprocess_send_eof (proc
);
2497 XPROCESS (proc
)->raw_status_low
= Qnil
;
2498 XPROCESS (proc
)->raw_status_high
= Qnil
;
2499 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2500 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2501 deactivate_process (proc
);
2503 error ("Error writing to process %s; closed it", procname
);
2505 error ("SIGPIPE raised on process %s; closed it", procname
);
2510 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
2512 "Send current contents of region as input to PROCESS.\n\
2513 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2514 nil, indicating the current buffer's process.\n\
2515 Called from program, takes three arguments, PROCESS, START and END.\n\
2516 If the region is more than 500 characters long,\n\
2517 it is sent in several bunches. This may happen even for shorter regions.\n\
2518 Output from processes can arrive in between bunches.")
2519 (process
, start
, end
)
2520 Lisp_Object process
, start
, end
;
2525 proc
= get_process (process
);
2526 validate_region (&start
, &end
);
2528 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
2531 start1
= XINT (start
);
2532 send_process (proc
, &FETCH_CHAR (start1
), XINT (end
) - XINT (start
),
2533 Fcurrent_buffer ());
2538 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
2540 "Send PROCESS the contents of STRING as input.\n\
2541 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2542 nil, indicating the current buffer's process.\n\
2543 If STRING is more than 500 characters long,\n\
2544 it is sent in several bunches. This may happen even for shorter strings.\n\
2545 Output from processes can arrive in between bunches.")
2547 Lisp_Object process
, string
;
2550 CHECK_STRING (string
, 1);
2551 proc
= get_process (process
);
2552 send_process (proc
, XSTRING (string
)->data
, XSTRING (string
)->size
, string
);
2556 /* send a signal number SIGNO to PROCESS.
2557 CURRENT_GROUP means send to the process group that currently owns
2558 the terminal being used to communicate with PROCESS.
2559 This is used for various commands in shell mode.
2560 If NOMSG is zero, insert signal-announcements into process's buffers
2563 If we can, we try to signal PROCESS by sending control characters
2564 down the pty. This allows us to signal inferiors who have changed
2565 their uid, for which killpg would return an EPERM error. */
2568 process_send_signal (process
, signo
, current_group
, nomsg
)
2569 Lisp_Object process
;
2571 Lisp_Object current_group
;
2575 register struct Lisp_Process
*p
;
2579 proc
= get_process (process
);
2580 p
= XPROCESS (proc
);
2582 if (!EQ (p
->childp
, Qt
))
2583 error ("Process %s is not a subprocess",
2584 XSTRING (p
->name
)->data
);
2585 if (XINT (p
->infd
) < 0)
2586 error ("Process %s is not active",
2587 XSTRING (p
->name
)->data
);
2589 if (NILP (p
->pty_flag
))
2590 current_group
= Qnil
;
2592 /* If we are using pgrps, get a pgrp number and make it negative. */
2593 if (!NILP (current_group
))
2595 #ifdef SIGNALS_VIA_CHARACTERS
2596 /* If possible, send signals to the entire pgrp
2597 by sending an input character to it. */
2599 /* TERMIOS is the latest and bestest, and seems most likely to
2600 work. If the system has it, use it. */
2607 tcgetattr (XINT (p
->infd
), &t
);
2608 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2612 tcgetattr (XINT (p
->infd
), &t
);
2613 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2617 tcgetattr (XINT (p
->infd
), &t
);
2618 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
2619 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2621 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
2626 #else /* ! HAVE_TERMIOS */
2628 /* On Berkeley descendants, the following IOCTL's retrieve the
2629 current control characters. */
2630 #if defined (TIOCGLTC) && defined (TIOCGETC)
2638 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2639 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
2642 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2643 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
2647 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
2648 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
2650 #endif /* ! defined (SIGTSTP) */
2653 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2655 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
2662 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2663 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2666 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2667 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2671 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2672 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2674 #endif /* ! defined (SIGTSTP) */
2676 #else /* ! defined (TCGETA) */
2677 Your configuration files are messed up
.
2678 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
2679 you'd better be using one of the alternatives above! */
2680 #endif /* ! defined (TCGETA) */
2681 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2682 #endif /* ! defined HAVE_TERMIOS */
2683 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
2686 /* Get the pgrp using the tty itself, if we have that.
2687 Otherwise, use the pty to get the pgrp.
2688 On pfa systems, saka@pfu.fujitsu.co.JP writes:
2689 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
2690 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
2691 His patch indicates that if TIOCGPGRP returns an error, then
2692 we should just assume that p->pid is also the process group id. */
2696 if (!NILP (p
->subtty
))
2697 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
2699 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
2703 gid
= - XFASTINT (p
->pid
);
2704 #endif /* ! defined (pfa) */
2710 #else /* ! defined (TIOCGPGRP ) */
2711 /* Can't select pgrps on this system, so we know that
2712 the child itself heads the pgrp. */
2713 gid
= - XFASTINT (p
->pid
);
2714 #endif /* ! defined (TIOCGPGRP ) */
2717 gid
= - XFASTINT (p
->pid
);
2723 p
->raw_status_low
= Qnil
;
2724 p
->raw_status_high
= Qnil
;
2726 XSETINT (p
->tick
, ++process_tick
);
2730 #endif /* ! defined (SIGCONT) */
2733 send_process (proc
, "\003", 1, Qnil
); /* ^C */
2738 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
2743 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
2746 flush_pending_output (XINT (p
->infd
));
2750 /* If we don't have process groups, send the signal to the immediate
2751 subprocess. That isn't really right, but it's better than any
2752 obvious alternative. */
2755 kill (XFASTINT (p
->pid
), signo
);
2759 /* gid may be a pid, or minus a pgrp's number */
2761 if (!NILP (current_group
))
2762 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
2765 gid
= - XFASTINT (p
->pid
);
2768 #else /* ! defined (TIOCSIGSEND) */
2769 EMACS_KILLPG (-gid
, signo
);
2770 #endif /* ! defined (TIOCSIGSEND) */
2773 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
2774 "Interrupt process PROCESS. May be process or name of one.\n\
2775 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
2776 nil or no arg means current buffer's process.\n\
2777 Second arg CURRENT-GROUP non-nil means send signal to\n\
2778 the current process-group of the process's controlling terminal\n\
2779 rather than to the process's own process group.\n\
2780 If the process is a shell, this means interrupt current subjob\n\
2781 rather than the shell.")
2782 (process
, current_group
)
2783 Lisp_Object process
, current_group
;
2785 process_send_signal (process
, SIGINT
, current_group
, 0);
2789 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
2790 "Kill process PROCESS. May be process or name of one.\n\
2791 See function `interrupt-process' for more details on usage.")
2792 (process
, current_group
)
2793 Lisp_Object process
, current_group
;
2795 process_send_signal (process
, SIGKILL
, current_group
, 0);
2799 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
2800 "Send QUIT signal to process PROCESS. May be process or name of one.\n\
2801 See function `interrupt-process' for more details on usage.")
2802 (process
, current_group
)
2803 Lisp_Object process
, current_group
;
2805 process_send_signal (process
, SIGQUIT
, current_group
, 0);
2809 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
2810 "Stop process PROCESS. May be process or name of one.\n\
2811 See function `interrupt-process' for more details on usage.")
2812 (process
, current_group
)
2813 Lisp_Object process
, current_group
;
2816 error ("no SIGTSTP support");
2818 process_send_signal (process
, SIGTSTP
, current_group
, 0);
2823 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
2824 "Continue process PROCESS. May be process or name of one.\n\
2825 See function `interrupt-process' for more details on usage.")
2826 (process
, current_group
)
2827 Lisp_Object process
, current_group
;
2830 process_send_signal (process
, SIGCONT
, current_group
, 0);
2832 error ("no SIGCONT support");
2837 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
2838 2, 2, "nProcess number: \nnSignal code: ",
2839 "Send the process with number PID the signal with code CODE.\n\
2840 Both PID and CODE are integers.")
2842 Lisp_Object pid
, sig
;
2844 CHECK_NUMBER (pid
, 0);
2845 CHECK_NUMBER (sig
, 1);
2846 return make_number (kill (XINT (pid
), XINT (sig
)));
2849 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
2850 "Make PROCESS see end-of-file in its input.\n\
2851 Eof comes after any text already sent to it.\n\
2852 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2853 nil, indicating the current buffer's process.\n\
2854 If PROCESS is a network connection, or is a process communicating\n\
2855 through a pipe (as opposed to a pty), then you cannot send any more\n\
2856 text to PROCESS after you call this function.")
2858 Lisp_Object process
;
2862 proc
= get_process (process
);
2864 /* Make sure the process is really alive. */
2865 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2866 update_status (XPROCESS (proc
));
2867 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2868 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
2870 /* Sending a zero-length record is supposed to mean eof
2871 when TIOCREMOTE is turned on. */
2875 write (XINT (XPROCESS (proc
)->outfd
), buf
, 0);
2877 #else /* did not do TOICREMOTE */
2879 send_process (proc
, "\032", 1, Qnil
); /* ^z */
2881 if (!NILP (XPROCESS (proc
)->pty_flag
))
2882 send_process (proc
, "\004", 1, Qnil
);
2885 close (XINT (XPROCESS (proc
)->outfd
));
2886 XSET (XPROCESS (proc
)->outfd
, Lisp_Int
, open (NULL_DEVICE
, O_WRONLY
));
2889 #endif /* did not do TOICREMOTE */
2893 /* Kill all processes associated with `buffer'.
2894 If `buffer' is nil, kill all processes */
2896 kill_buffer_processes (buffer
)
2899 Lisp_Object tail
, proc
;
2901 for (tail
= Vprocess_alist
; XGCTYPE (tail
) == Lisp_Cons
;
2902 tail
= XCONS (tail
)->cdr
)
2904 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
2905 if (XGCTYPE (proc
) == Lisp_Process
2906 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
2908 if (NETCONN_P (proc
))
2909 Fdelete_process (proc
);
2910 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
2911 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
2916 /* On receipt of a signal that a child status has changed,
2917 loop asking about children with changed statuses until
2918 the system says there are no more.
2919 All we do is change the status;
2920 we do not run sentinels or print notifications.
2921 That is saved for the next time keyboard input is done,
2922 in order to avoid timing errors. */
2924 /** WARNING: this can be called during garbage collection.
2925 Therefore, it must not be fooled by the presence of mark bits in
2928 /** USG WARNING: Although it is not obvious from the documentation
2929 in signal(2), on a USG system the SIGCLD handler MUST NOT call
2930 signal() before executing at least one wait(), otherwise the handler
2931 will be called again, resulting in an infinite loop. The relevant
2932 portion of the documentation reads "SIGCLD signals will be queued
2933 and the signal-catching function will be continually reentered until
2934 the queue is empty". Invoking signal() causes the kernel to reexamine
2935 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
2938 sigchld_handler (signo
)
2941 int old_errno
= errno
;
2943 register struct Lisp_Process
*p
;
2944 extern EMACS_TIME
*input_available_clear_time
;
2948 sigheld
|= sigbit (SIGCHLD
);
2960 #endif /* no WUNTRACED */
2961 /* Keep trying to get a status until we get a definitive result. */
2965 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
2967 while (pid
<= 0 && errno
== EINTR
);
2971 /* A real failure. We have done all our job, so return. */
2973 /* USG systems forget handlers when they are used;
2974 must reestablish each time */
2976 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
2979 sigheld
&= ~sigbit (SIGCHLD
);
2987 #endif /* no WNOHANG */
2989 /* Find the process that signaled us, and record its status. */
2992 for (tail
= Vprocess_alist
; XSYMBOL (tail
) != XSYMBOL (Qnil
); tail
= XCONS (tail
)->cdr
)
2994 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
2995 p
= XPROCESS (proc
);
2996 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
3001 /* Look for an asynchronous process whose pid hasn't been filled
3004 for (tail
= Vprocess_alist
; XSYMBOL (tail
) != XSYMBOL (Qnil
); tail
= XCONS (tail
)->cdr
)
3006 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3007 p
= XPROCESS (proc
);
3008 if (XTYPE (p
->pid
) == Lisp_Int
&& XINT (p
->pid
) == -1)
3013 /* Change the status of the process that was found. */
3016 union { int i
; WAITTYPE wt
; } u
;
3018 XSETINT (p
->tick
, ++process_tick
);
3020 XFASTINT (p
->raw_status_low
) = u
.i
& 0xffff;
3021 XFASTINT (p
->raw_status_high
) = u
.i
>> 16;
3023 /* If process has terminated, stop waiting for its output. */
3024 if (WIFSIGNALED (w
) || WIFEXITED (w
))
3025 if (XINT (p
->infd
) >= 0)
3026 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
3028 /* Tell wait_reading_process_input that it needs to wake up and
3030 if (input_available_clear_time
)
3031 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3034 /* There was no asynchronous process found for that id. Check
3035 if we have a synchronous process. */
3038 synch_process_alive
= 0;
3040 /* Report the status of the synchronous process. */
3042 synch_process_retcode
= WRETCODE (w
);
3043 else if (WIFSIGNALED (w
))
3045 int code
= WTERMSIG (w
);
3051 signame
= sys_siglist
[code
];
3053 signame
= sys_errlist
[code
];
3057 signame
= "unknown";
3059 synch_process_death
= signame
;
3062 /* Tell wait_reading_process_input that it needs to wake up and
3064 if (input_available_clear_time
)
3065 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3068 /* On some systems, we must return right away.
3069 If any more processes want to signal us, we will
3071 Otherwise (on systems that have WNOHANG), loop around
3072 to use up all the processes that have something to tell us. */
3073 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG))
3075 signal (signo
, sigchld_handler
);
3079 #endif /* USG, but not HPUX with WNOHANG */
3085 exec_sentinel_unwind (data
)
3088 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
3093 exec_sentinel (proc
, reason
)
3094 Lisp_Object proc
, reason
;
3096 Lisp_Object sentinel
, obuffer
, odeactivate
;
3097 register struct Lisp_Process
*p
= XPROCESS (proc
);
3098 int count
= specpdl_ptr
- specpdl
;
3100 odeactivate
= Vdeactivate_mark
;
3101 obuffer
= Fcurrent_buffer ();
3102 sentinel
= p
->sentinel
;
3103 if (NILP (sentinel
))
3106 /* Zilch the sentinel while it's running, to avoid recursive invocations;
3107 assure that it gets restored no matter how the sentinel exits. */
3109 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
3110 /* Inhibit quit so that random quits don't screw up a running filter. */
3111 specbind (Qinhibit_quit
, Qt
);
3112 specbind (Qlast_nonmenu_event
, Qt
);
3113 call2 (sentinel
, proc
, reason
);
3115 Vdeactivate_mark
= odeactivate
;
3116 if (! EQ (Fcurrent_buffer (), obuffer
))
3117 record_asynch_buffer_change ();
3119 if (waiting_for_user_input_p
)
3120 prepare_menu_bars ();
3121 unbind_to (count
, Qnil
);
3124 /* Report all recent events of a change in process status
3125 (either run the sentinel or output a message).
3126 This is done while Emacs is waiting for keyboard input. */
3130 register Lisp_Object proc
, buffer
;
3131 Lisp_Object tail
, msg
;
3132 struct gcpro gcpro1
, gcpro2
;
3136 /* We need to gcpro tail; if read_process_output calls a filter
3137 which deletes a process and removes the cons to which tail points
3138 from Vprocess_alist, and then causes a GC, tail is an unprotected
3142 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
3145 register struct Lisp_Process
*p
;
3147 proc
= Fcdr (Fcar (tail
));
3148 p
= XPROCESS (proc
);
3150 if (XINT (p
->tick
) != XINT (p
->update_tick
))
3152 XSETINT (p
->update_tick
, XINT (p
->tick
));
3154 /* If process is still active, read any output that remains. */
3155 if (XINT (p
->infd
) >= 0)
3156 while (! EQ (p
->filter
, Qt
)
3157 && read_process_output (proc
, XINT (p
->infd
)) > 0);
3161 /* Get the text to use for the message. */
3162 if (!NILP (p
->raw_status_low
))
3164 msg
= status_message (p
->status
);
3166 /* If process is terminated, deactivate it or delete it. */
3168 if (XTYPE (p
->status
) == Lisp_Cons
)
3169 symbol
= XCONS (p
->status
)->car
;
3171 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
3172 || EQ (symbol
, Qclosed
))
3174 if (delete_exited_processes
)
3175 remove_process (proc
);
3177 deactivate_process (proc
);
3180 /* Now output the message suitably. */
3181 if (!NILP (p
->sentinel
))
3182 exec_sentinel (proc
, msg
);
3183 /* Don't bother with a message in the buffer
3184 when a process becomes runnable. */
3185 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
3187 Lisp_Object ro
, tem
;
3188 struct buffer
*old
= current_buffer
;
3191 ro
= XBUFFER (buffer
)->read_only
;
3193 /* Avoid error if buffer is deleted
3194 (probably that's why the process is dead, too) */
3195 if (NILP (XBUFFER (buffer
)->name
))
3197 Fset_buffer (buffer
);
3199 /* Insert new output into buffer
3200 at the current end-of-output marker,
3201 thus preserving logical ordering of input and output. */
3202 if (XMARKER (p
->mark
)->buffer
)
3203 SET_PT (marker_position (p
->mark
));
3206 if (point
<= opoint
)
3207 opoint
+= XSTRING (msg
)->size
+ XSTRING (p
->name
)->size
+ 10;
3209 tem
= current_buffer
->read_only
;
3210 current_buffer
->read_only
= Qnil
;
3211 insert_string ("\nProcess ");
3212 Finsert (1, &p
->name
);
3213 insert_string (" ");
3215 current_buffer
->read_only
= tem
;
3216 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
3219 set_buffer_internal (old
);
3224 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
3225 redisplay_preserve_echo_area ();
3227 update_tick
= process_tick
;
3238 if (! noninteractive
|| initialized
)
3240 signal (SIGCHLD
, sigchld_handler
);
3243 FD_ZERO (&input_wait_mask
);
3244 max_process_desc
= 0;
3246 keyboard_descriptor
= 0;
3247 FD_SET (keyboard_descriptor
, &input_wait_mask
);
3249 Vprocess_alist
= Qnil
;
3250 for (i
= 0; i
< MAXDESC
; i
++)
3252 chan_process
[i
] = Qnil
;
3253 proc_buffered_char
[i
] = -1;
3257 /* From now on, assume keyboard input comes from descriptor DESC. */
3260 change_keyboard_wait_descriptor (desc
)
3263 FD_CLR (keyboard_descriptor
, &input_wait_mask
);
3264 keyboard_descriptor
= desc
;
3265 FD_SET (keyboard_descriptor
, &input_wait_mask
);
3271 stream_process
= intern ("stream");
3273 Qprocessp
= intern ("processp");
3274 staticpro (&Qprocessp
);
3275 Qrun
= intern ("run");
3277 Qstop
= intern ("stop");
3279 Qsignal
= intern ("signal");
3280 staticpro (&Qsignal
);
3282 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
3285 Qexit = intern ("exit");
3286 staticpro (&Qexit); */
3288 Qopen
= intern ("open");
3290 Qclosed
= intern ("closed");
3291 staticpro (&Qclosed
);
3293 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
3294 staticpro (&Qlast_nonmenu_event
);
3296 staticpro (&Vprocess_alist
);
3298 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
3299 "*Non-nil means delete processes immediately when they exit.\n\
3300 nil means don't delete them until `list-processes' is run.");
3302 delete_exited_processes
= 1;
3304 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
3305 "Control type of device used to communicate with subprocesses.\n\
3306 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
3307 The value has no effect if the system has no ptys or if all ptys are busy:\n\
3308 then a pipe is used in any case.\n\
3309 The value takes effect when `start-process' is called.");
3310 Vprocess_connection_type
= Qt
;
3312 defsubr (&Sprocessp
);
3313 defsubr (&Sget_process
);
3314 defsubr (&Sget_buffer_process
);
3315 defsubr (&Sdelete_process
);
3316 defsubr (&Sprocess_status
);
3317 defsubr (&Sprocess_exit_status
);
3318 defsubr (&Sprocess_id
);
3319 defsubr (&Sprocess_name
);
3320 defsubr (&Sprocess_command
);
3321 defsubr (&Sset_process_buffer
);
3322 defsubr (&Sprocess_buffer
);
3323 defsubr (&Sprocess_mark
);
3324 defsubr (&Sset_process_filter
);
3325 defsubr (&Sprocess_filter
);
3326 defsubr (&Sset_process_sentinel
);
3327 defsubr (&Sset_process_window_size
);
3328 defsubr (&Sprocess_sentinel
);
3329 defsubr (&Sprocess_kill_without_query
);
3330 defsubr (&Slist_processes
);
3331 defsubr (&Sprocess_list
);
3332 defsubr (&Sstart_process
);
3334 defsubr (&Sopen_network_stream
);
3335 #endif /* HAVE_SOCKETS */
3336 defsubr (&Saccept_process_output
);
3337 defsubr (&Sprocess_send_region
);
3338 defsubr (&Sprocess_send_string
);
3339 defsubr (&Sinterrupt_process
);
3340 defsubr (&Skill_process
);
3341 defsubr (&Squit_process
);
3342 defsubr (&Sstop_process
);
3343 defsubr (&Scontinue_process
);
3344 defsubr (&Sprocess_send_eof
);
3345 defsubr (&Ssignal_process
);
3346 defsubr (&Swaiting_for_user_input_p
);
3347 /* defsubr (&Sprocess_connection); */
3351 #else /* not subprocesses */
3353 #include <sys/types.h>
3357 #include "systime.h"
3358 #include "termopts.h"
3360 extern int frame_garbaged
;
3363 /* As described above, except assuming that there are no subprocesses:
3365 Wait for timeout to elapse and/or keyboard input to be available.
3368 timeout in seconds, or
3369 zero for no limit, or
3370 -1 means gobble data immediately available but don't wait for any.
3372 read_kbd is a Lisp_Object:
3373 0 to ignore keyboard input, or
3374 1 to return when input is available, or
3375 -1 means caller will actually read the input, so don't throw to
3377 We know that read_kbd will never be a Lisp_Process, since
3378 `subprocesses' isn't defined.
3380 do_display != 0 means redisplay should be done to show subprocess
3381 output that arrives.
3383 Return true iff we received input from any process. */
3386 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
3387 int time_limit
, microsecs
;
3388 Lisp_Object read_kbd
;
3391 EMACS_TIME end_time
, timeout
, *timeout_p
;
3394 /* What does time_limit really mean? */
3395 if (time_limit
|| microsecs
)
3397 /* It's not infinite. */
3398 timeout_p
= &timeout
;
3400 if (time_limit
== -1)
3401 /* In fact, it's zero. */
3402 EMACS_SET_SECS_USECS (timeout
, 0, 0);
3404 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
3406 /* How far in the future is that? */
3407 EMACS_GET_TIME (end_time
);
3408 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
3411 /* It's infinite. */
3414 /* This must come before stop_polling. */
3415 prepare_menu_bars ();
3417 /* Turn off periodic alarms (in case they are in use)
3418 because the select emulator uses alarms. */
3425 waitchannels
= XINT (read_kbd
) ? 1 : 0;
3427 /* If calling from keyboard input, do not quit
3428 since we want to return C-g as an input character.
3429 Otherwise, do pending quit if requested. */
3430 if (XINT (read_kbd
) >= 0)
3435 EMACS_GET_TIME (*timeout_p
);
3436 EMACS_SUB_TIME (*timeout_p
, end_time
, *timeout_p
);
3437 if (EMACS_TIME_NEG_P (*timeout_p
))
3441 /* Cause C-g and alarm signals to take immediate action,
3442 and cause input available signals to zero out timeout. */
3443 if (XINT (read_kbd
) < 0)
3444 set_waiting_for_input (&timeout
);
3446 /* If a frame has been newly mapped and needs updating,
3447 reprocess its display stuff. */
3448 if (frame_garbaged
&& do_display
)
3449 redisplay_preserve_echo_area ();
3451 if (XINT (read_kbd
) && detect_input_pending ())
3454 nfds
= select (1, &waitchannels
, 0, 0, timeout_p
);
3456 /* Make C-g and alarm signals set flags again */
3457 clear_waiting_for_input ();
3459 /* If we woke up due to SIGWINCH, actually change size now. */
3460 do_pending_window_change ();
3464 /* If the system call was interrupted, then go around the
3470 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
3471 /* System sometimes fails to deliver SIGIO. */
3472 kill (getpid (), SIGIO
);
3475 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
3479 /* If we have timed out (nfds == 0) or found some input (nfds > 0),
3491 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
3492 /* Don't confuse make-docfile by having two doc strings for this function.
3493 make-docfile does not pay attention to #if, for good reason! */
3496 register Lisp_Object name
;
3501 /* Kill all processes associated with `buffer'.
3502 If `buffer' is nil, kill all processes.
3503 Since we have no subprocesses, this does nothing. */
3505 kill_buffer_processes (buffer
)
3516 defsubr (&Sget_buffer_process
);
3520 #endif /* not subprocesses */