1 /* Asynchronous subprocess control for GNU Emacs.
2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 1996
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
27 /* This file is split into two parts by the following preprocessor
28 conditional. The 'then' clause contains all of the support for
29 asynchronous subprocesses. The 'else' clause contains stub
30 versions of some of the asynchronous subprocess routines that are
31 often called elsewhere in Emacs, so we don't have to #ifdef the
32 sections that call them. */
40 #include <sys/types.h> /* some typedefs are used in sys/file.h */
50 #endif /* not WINDOWSNT */
52 #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */
53 #include <sys/socket.h>
55 #include <netinet/in.h>
56 #include <arpa/inet.h>
57 #ifdef NEED_NET_ERRNO_H
58 #include <net/errno.h>
59 #endif /* NEED_NET_ERRNO_H */
60 #endif /* HAVE_SOCKETS */
62 /* TERM is a poor-man's SLIP, used on Linux. */
67 /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */
68 #ifdef HAVE_BROKEN_INET_ADDR
69 #define IN_ADDR struct in_addr
70 #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1)
72 #define IN_ADDR unsigned long
73 #define NUMERIC_ADDR_ERROR (numeric_addr == -1)
76 #if defined(BSD) || defined(STRIDE)
77 #include <sys/ioctl.h>
78 #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5)
80 #endif /* HAVE_PTYS and no O_NDELAY */
81 #endif /* BSD or STRIDE */
83 #ifdef BROKEN_O_NONBLOCK
85 #endif /* BROKEN_O_NONBLOCK */
92 #include <sys/sysmacros.h> /* for "minor" */
102 #include "termhooks.h"
103 #include "termopts.h"
104 #include "commands.h"
107 Lisp_Object Qprocessp
;
108 Lisp_Object Qrun
, Qstop
, Qsignal
, Qopen
, Qclosed
;
109 Lisp_Object Qlast_nonmenu_event
;
110 /* Qexit is declared and initialized in eval.c. */
112 /* a process object is a network connection when its childp field is neither
113 Qt nor Qnil but is instead a string (name of foreign host we
114 are connected to + name of port we are connected to) */
117 static Lisp_Object stream_process
;
119 #define NETCONN_P(p) (GC_STRINGP (XPROCESS (p)->childp))
121 #define NETCONN_P(p) 0
122 #endif /* HAVE_SOCKETS */
124 /* Define first descriptor number available for subprocesses. */
126 #define FIRST_PROC_DESC 1
128 #define FIRST_PROC_DESC 3
131 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
134 #if !defined (SIGCHLD) && defined (SIGCLD)
135 #define SIGCHLD SIGCLD
138 #include "syssignal.h"
143 extern char *strerror ();
145 extern char *sys_errlist
[];
152 #ifndef SYS_SIGLIST_DECLARED
157 extern char *sys_siglist
[];
158 #endif /* not LINUX */
160 char *sys_siglist
[] =
166 "illegal instruction",
170 "floating point exception",
173 "segmentation violation",
174 "bad argument to system call",
175 "write on a pipe with no one to read it",
177 "software termination signal from kill",
179 "sendable stop signal not from tty",
180 "stop signal from tty",
181 "continue a stopped process",
182 "child status has changed",
183 "background read attempted from control tty",
184 "background write attempted from control tty",
185 "input record available at control tty",
186 "exceeded CPU time limit",
187 "exceeded file size limit"
189 #endif /* not WINDOWSNT */
192 #endif /* ! SYS_SIGLIST_DECLARED */
194 /* t means use pty, nil means use a pipe,
195 maybe other values to come. */
196 static Lisp_Object Vprocess_connection_type
;
200 #include <sys/socket.h>
204 /* These next two vars are non-static since sysdep.c uses them in the
205 emulation of `select'. */
206 /* Number of events of change of status of a process. */
208 /* Number of events for which the user or sentinel has been notified. */
211 #include "sysselect.h"
213 /* If we support a window system, turn on the code to poll periodically
214 to detect C-g. It isn't actually used when doing interrupt input. */
215 #ifdef HAVE_WINDOW_SYSTEM
216 #define POLL_FOR_INPUT
219 /* Mask of bits indicating the descriptors that we wait for input on. */
221 static SELECT_TYPE input_wait_mask
;
223 /* Mask that excludes keyboard input descriptor (s). */
225 static SELECT_TYPE non_keyboard_wait_mask
;
227 /* The largest descriptor currently in use for a process object. */
228 static int max_process_desc
;
230 /* The largest descriptor currently in use for keyboard input. */
231 static int max_keyboard_desc
;
233 /* Nonzero means delete a process right away if it exits. */
234 static int delete_exited_processes
;
236 /* Indexed by descriptor, gives the process (if any) for that descriptor */
237 Lisp_Object chan_process
[MAXDESC
];
239 /* Alist of elements (NAME . PROCESS) */
240 Lisp_Object Vprocess_alist
;
242 /* Buffered-ahead input char from process, indexed by channel.
243 -1 means empty (no char is buffered).
244 Used on sys V where the only way to tell if there is any
245 output from the process is to read at least one char.
246 Always -1 on systems that support FIONREAD. */
248 /* Don't make static; need to access externally. */
249 int proc_buffered_char
[MAXDESC
];
251 static Lisp_Object
get_process ();
253 extern EMACS_TIME
timer_check ();
255 /* Maximum number of bytes to send to a pty without an eof. */
256 static int pty_max_bytes
;
259 /* The file name of the pty opened by allocate_pty. */
261 static char pty_name
[24];
264 /* Compute the Lisp form of the process status, p->status, from
265 the numeric status that was returned by `wait'. */
267 Lisp_Object
status_convert ();
270 struct Lisp_Process
*p
;
272 union { int i
; WAITTYPE wt
; } u
;
273 u
.i
= XFASTINT (p
->raw_status_low
) + (XFASTINT (p
->raw_status_high
) << 16);
274 p
->status
= status_convert (u
.wt
);
275 p
->raw_status_low
= Qnil
;
276 p
->raw_status_high
= Qnil
;
279 /* Convert a process status word in Unix format to
280 the list that we use internally. */
287 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
288 else if (WIFEXITED (w
))
289 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
290 WCOREDUMP (w
) ? Qt
: Qnil
));
291 else if (WIFSIGNALED (w
))
292 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
293 WCOREDUMP (w
) ? Qt
: Qnil
));
298 /* Given a status-list, extract the three pieces of information
299 and store them individually through the three pointers. */
302 decode_status (l
, symbol
, code
, coredump
)
318 *symbol
= XCONS (l
)->car
;
319 tem
= XCONS (l
)->cdr
;
320 *code
= XFASTINT (XCONS (tem
)->car
);
321 tem
= XCONS (tem
)->cdr
;
322 *coredump
= !NILP (tem
);
326 /* Return a string describing a process status list. */
329 status_message (status
)
334 Lisp_Object string
, string2
;
336 decode_status (status
, &symbol
, &code
, &coredump
);
338 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
344 /* Cast to suppress warning if the table has const char *. */
345 signame
= (char *) sys_siglist
[code
];
347 signame
= sys_errlist
[code
];
352 string
= build_string (signame
);
353 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
354 XSTRING (string
)->data
[0] = DOWNCASE (XSTRING (string
)->data
[0]);
355 return concat2 (string
, string2
);
357 else if (EQ (symbol
, Qexit
))
360 return build_string ("finished\n");
361 string
= Fnumber_to_string (make_number (code
));
362 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
363 return concat2 (build_string ("exited abnormally with code "),
364 concat2 (string
, string2
));
367 return Fcopy_sequence (Fsymbol_name (symbol
));
372 /* Open an available pty, returning a file descriptor.
373 Return -1 on failure.
374 The file name of the terminal corresponding to the pty
375 is left in the variable pty_name. */
384 /* Some systems name their pseudoterminals so that there are gaps in
385 the usual sequence - for example, on HP9000/S700 systems, there
386 are no pseudoterminals with names ending in 'f'. So we wait for
387 three failures in a row before deciding that we've reached the
389 int failed_count
= 0;
394 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
395 for (i
= 0; i
< 16; i
++)
398 #ifdef PTY_NAME_SPRINTF
401 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
402 #endif /* no PTY_NAME_SPRINTF */
406 #else /* no PTY_OPEN */
408 /* Unusual IRIS code */
409 *ptyv
= open ("/dev/ptc", O_RDWR
| O_NDELAY
, 0);
412 if (fstat (fd
, &stb
) < 0)
415 if (stat (pty_name
, &stb
) < 0)
418 if (failed_count
>= 3)
424 fd
= open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
426 fd
= open (pty_name
, O_RDWR
| O_NDELAY
, 0);
428 #endif /* not IRIS */
429 #endif /* no PTY_OPEN */
433 /* check to make certain that both sides are available
434 this avoids a nasty yet stupid bug in rlogins */
435 #ifdef PTY_TTY_NAME_SPRINTF
438 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
439 #endif /* no PTY_TTY_NAME_SPRINTF */
441 if (access (pty_name
, 6) != 0)
444 #if !defined(IRIS) && !defined(__sgi)
450 #endif /* not UNIPLUS */
457 #endif /* HAVE_PTYS */
463 struct Lisp_Vector
*vec
;
464 register Lisp_Object val
, tem
, name1
;
465 register struct Lisp_Process
*p
;
469 vec
= allocate_vectorlike ((EMACS_INT
) VECSIZE (struct Lisp_Process
));
470 for (i
= 0; i
< VECSIZE (struct Lisp_Process
); i
++)
471 vec
->contents
[i
] = Qnil
;
472 vec
->size
= VECSIZE (struct Lisp_Process
);
473 p
= (struct Lisp_Process
*)vec
;
475 XSETINT (p
->infd
, -1);
476 XSETINT (p
->outfd
, -1);
477 XSETFASTINT (p
->pid
, 0);
478 XSETFASTINT (p
->tick
, 0);
479 XSETFASTINT (p
->update_tick
, 0);
480 p
->raw_status_low
= Qnil
;
481 p
->raw_status_high
= Qnil
;
483 p
->mark
= Fmake_marker ();
485 /* If name is already in use, modify it until it is unused. */
490 tem
= Fget_process (name1
);
491 if (NILP (tem
)) break;
492 sprintf (suffix
, "<%d>", i
);
493 name1
= concat2 (name
, build_string (suffix
));
497 XSETPROCESS (val
, p
);
498 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
502 remove_process (proc
)
503 register Lisp_Object proc
;
505 register Lisp_Object pair
;
507 pair
= Frassq (proc
, Vprocess_alist
);
508 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
509 Fset_marker (XPROCESS (proc
)->mark
, Qnil
, Qnil
);
511 deactivate_process (proc
);
514 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
515 "Return t if OBJECT is a process.")
519 return PROCESSP (object
) ? Qt
: Qnil
;
522 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
523 "Return the process named NAME, or nil if there is none.")
525 register Lisp_Object name
;
529 CHECK_STRING (name
, 0);
530 return Fcdr (Fassoc (name
, Vprocess_alist
));
533 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
534 "Return the (or, a) process associated with BUFFER.\n\
535 BUFFER may be a buffer or the name of one.")
537 register Lisp_Object buffer
;
539 register Lisp_Object buf
, tail
, proc
;
541 if (NILP (buffer
)) return Qnil
;
542 buf
= Fget_buffer (buffer
);
543 if (NILP (buf
)) return Qnil
;
545 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
547 proc
= Fcdr (Fcar (tail
));
548 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
554 /* This is how commands for the user decode process arguments. It
555 accepts a process, a process name, a buffer, a buffer name, or nil.
556 Buffers denote the first process in the buffer, and nil denotes the
561 register Lisp_Object name
;
563 register Lisp_Object proc
, obj
;
566 obj
= Fget_process (name
);
568 obj
= Fget_buffer (name
);
570 error ("Process %s does not exist", XSTRING (name
)->data
);
572 else if (NILP (name
))
573 obj
= Fcurrent_buffer ();
577 /* Now obj should be either a buffer object or a process object.
581 proc
= Fget_buffer_process (obj
);
583 error ("Buffer %s has no process", XSTRING (XBUFFER (obj
)->name
)->data
);
587 CHECK_PROCESS (obj
, 0);
593 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
594 "Delete PROCESS: kill it and forget about it immediately.\n\
595 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
596 nil, indicating the current buffer's process.")
598 register Lisp_Object process
;
600 process
= get_process (process
);
601 XPROCESS (process
)->raw_status_low
= Qnil
;
602 XPROCESS (process
)->raw_status_high
= Qnil
;
603 if (NETCONN_P (process
))
605 XPROCESS (process
)->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
606 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
608 else if (XINT (XPROCESS (process
)->infd
) >= 0)
610 Fkill_process (process
, Qnil
);
611 /* Do this now, since remove_process will make sigchld_handler do nothing. */
612 XPROCESS (process
)->status
613 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
614 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
617 remove_process (process
);
621 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
622 "Return the status of PROCESS: a symbol, one of these:\n\
623 run -- for a process that is running.\n\
624 stop -- for a process stopped but continuable.\n\
625 exit -- for a process that has exited.\n\
626 signal -- for a process that has got a fatal signal.\n\
627 open -- for a network stream connection that is open.\n\
628 closed -- for a network stream connection that is closed.\n\
629 nil -- if arg is a process name and no such process exists.\n\
630 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
631 nil, indicating the current buffer's process.")
633 register Lisp_Object process
;
635 register struct Lisp_Process
*p
;
636 register Lisp_Object status
;
638 if (STRINGP (process
))
639 process
= Fget_process (process
);
641 process
= get_process (process
);
646 p
= XPROCESS (process
);
647 if (!NILP (p
->raw_status_low
))
651 status
= XCONS (status
)->car
;
652 if (NETCONN_P (process
))
654 if (EQ (status
, Qrun
))
656 else if (EQ (status
, Qexit
))
662 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
664 "Return the exit status of PROCESS or the signal number that killed it.\n\
665 If PROCESS has not yet exited or died, return 0.")
667 register Lisp_Object process
;
669 CHECK_PROCESS (process
, 0);
670 if (!NILP (XPROCESS (process
)->raw_status_low
))
671 update_status (XPROCESS (process
));
672 if (CONSP (XPROCESS (process
)->status
))
673 return XCONS (XCONS (XPROCESS (process
)->status
)->cdr
)->car
;
674 return make_number (0);
677 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
678 "Return the process id of PROCESS.\n\
679 This is the pid of the Unix process which PROCESS uses or talks to.\n\
680 For a network connection, this value is nil.")
682 register Lisp_Object process
;
684 CHECK_PROCESS (process
, 0);
685 return XPROCESS (process
)->pid
;
688 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
689 "Return the name of PROCESS, as a string.\n\
690 This is the name of the program invoked in PROCESS,\n\
691 possibly modified to make it unique among process names.")
693 register Lisp_Object process
;
695 CHECK_PROCESS (process
, 0);
696 return XPROCESS (process
)->name
;
699 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
700 "Return the command that was executed to start PROCESS.\n\
701 This is a list of strings, the first string being the program executed\n\
702 and the rest of the strings being the arguments given to it.\n\
703 For a non-child channel, this is nil.")
705 register Lisp_Object process
;
707 CHECK_PROCESS (process
, 0);
708 return XPROCESS (process
)->command
;
711 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
712 "Return the name of the terminal PROCESS uses, or nil if none.\n\
713 This is the terminal that the process itself reads and writes on,\n\
714 not the name of the pty that Emacs uses to talk with that terminal.")
716 register Lisp_Object process
;
718 CHECK_PROCESS (process
, 0);
719 return XPROCESS (process
)->tty_name
;
722 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
724 "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).")
726 register Lisp_Object process
, buffer
;
728 CHECK_PROCESS (process
, 0);
730 CHECK_BUFFER (buffer
, 1);
731 XPROCESS (process
)->buffer
= buffer
;
735 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
737 "Return the buffer PROCESS is associated with.\n\
738 Output from PROCESS is inserted in this buffer\n\
739 unless PROCESS has a filter.")
741 register Lisp_Object process
;
743 CHECK_PROCESS (process
, 0);
744 return XPROCESS (process
)->buffer
;
747 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
749 "Return the marker for the end of the last output from PROCESS.")
751 register Lisp_Object process
;
753 CHECK_PROCESS (process
, 0);
754 return XPROCESS (process
)->mark
;
757 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
759 "Give PROCESS the filter function FILTER; nil means no filter.\n\
760 t means stop accepting output from the process.\n\
761 When a process has a filter, each time it does output\n\
762 the entire string of output is passed to the filter.\n\
763 The filter gets two arguments: the process and the string of output.\n\
764 If the process has a filter, its buffer is not used for output.")
766 register Lisp_Object process
, filter
;
768 CHECK_PROCESS (process
, 0);
771 FD_CLR (XINT (XPROCESS (process
)->infd
), &input_wait_mask
);
772 FD_CLR (XINT (XPROCESS (process
)->infd
), &non_keyboard_wait_mask
);
774 else if (EQ (XPROCESS (process
)->filter
, Qt
))
776 FD_SET (XINT (XPROCESS (process
)->infd
), &input_wait_mask
);
777 FD_SET (XINT (XPROCESS (process
)->infd
), &non_keyboard_wait_mask
);
779 XPROCESS (process
)->filter
= filter
;
783 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
785 "Returns the filter function of PROCESS; nil if none.\n\
786 See `set-process-filter' for more info on filter functions.")
788 register Lisp_Object process
;
790 CHECK_PROCESS (process
, 0);
791 return XPROCESS (process
)->filter
;
794 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
796 "Give PROCESS the sentinel SENTINEL; nil for none.\n\
797 The sentinel is called as a function when the process changes state.\n\
798 It gets two arguments: the process, and a string describing the change.")
800 register Lisp_Object process
, sentinel
;
802 CHECK_PROCESS (process
, 0);
803 XPROCESS (process
)->sentinel
= sentinel
;
807 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
809 "Return the sentinel of PROCESS; nil if none.\n\
810 See `set-process-sentinel' for more info on sentinels.")
812 register Lisp_Object process
;
814 CHECK_PROCESS (process
, 0);
815 return XPROCESS (process
)->sentinel
;
818 DEFUN ("set-process-window-size", Fset_process_window_size
,
819 Sset_process_window_size
, 3, 3, 0,
820 "Tell PROCESS that it has logical window size HEIGHT and WIDTH.")
821 (process
, height
, width
)
822 register Lisp_Object process
, height
, width
;
824 CHECK_PROCESS (process
, 0);
825 CHECK_NATNUM (height
, 0);
826 CHECK_NATNUM (width
, 0);
827 if (set_window_size (XINT (XPROCESS (process
)->infd
),
828 XINT (height
), XINT(width
)) <= 0)
834 DEFUN ("process-kill-without-query", Fprocess_kill_without_query
,
835 Sprocess_kill_without_query
, 1, 2, 0,
836 "Say no query needed if PROCESS is running when Emacs is exited.\n\
837 Optional second argument if non-nil says to require a query.\n\
838 Value is t if a query was formerly required.")
840 register Lisp_Object process
, value
;
844 CHECK_PROCESS (process
, 0);
845 tem
= XPROCESS (process
)->kill_without_query
;
846 XPROCESS (process
)->kill_without_query
= Fnull (value
);
851 #if 0 /* Turned off because we don't currently record this info
852 in the process. Perhaps add it. */
853 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
854 "Return the connection type of `PROCESS'.\n\
855 The value is `nil' for a pipe,\n\
856 `t' or `pty' for a pty, or `stream' for a socket connection.")
860 return XPROCESS (process
)->type
;
867 register Lisp_Object tail
, tem
;
868 Lisp_Object proc
, minspace
, tem1
;
869 register struct buffer
*old
= current_buffer
;
870 register struct Lisp_Process
*p
;
874 XSETFASTINT (minspace
, 1);
876 set_buffer_internal (XBUFFER (Vstandard_output
));
877 Fbuffer_disable_undo (Vstandard_output
);
879 current_buffer
->truncate_lines
= Qt
;
882 Proc Status Buffer Tty Command\n\
883 ---- ------ ------ --- -------\n", -1);
885 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
889 proc
= Fcdr (Fcar (tail
));
891 if (NILP (p
->childp
))
894 Finsert (1, &p
->name
);
895 Findent_to (make_number (13), minspace
);
897 if (!NILP (p
->raw_status_low
))
900 if (CONSP (p
->status
))
901 symbol
= XCONS (p
->status
)->car
;
904 if (EQ (symbol
, Qsignal
))
907 tem
= Fcar (Fcdr (p
->status
));
909 if (XINT (tem
) < NSIG
)
910 write_string (sys_errlist
[XINT (tem
)], -1);
913 Fprinc (symbol
, Qnil
);
915 else if (NETCONN_P (proc
))
917 if (EQ (symbol
, Qrun
))
918 write_string ("open", -1);
919 else if (EQ (symbol
, Qexit
))
920 write_string ("closed", -1);
922 Fprinc (symbol
, Qnil
);
925 Fprinc (symbol
, Qnil
);
927 if (EQ (symbol
, Qexit
))
930 tem
= Fcar (Fcdr (p
->status
));
933 sprintf (tembuf
, " %d", (int) XFASTINT (tem
));
934 write_string (tembuf
, -1);
938 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
939 remove_process (proc
);
941 Findent_to (make_number (22), minspace
);
942 if (NILP (p
->buffer
))
943 insert_string ("(none)");
944 else if (NILP (XBUFFER (p
->buffer
)->name
))
945 insert_string ("(Killed)");
947 Finsert (1, &XBUFFER (p
->buffer
)->name
);
949 Findent_to (make_number (37), minspace
);
951 if (STRINGP (p
->tty_name
))
952 Finsert (1, &p
->tty_name
);
954 insert_string ("(none)");
956 Findent_to (make_number (49), minspace
);
958 if (NETCONN_P (proc
))
960 sprintf (tembuf
, "(network stream connection to %s)\n",
961 XSTRING (p
->childp
)->data
);
962 insert_string (tembuf
);
976 insert_string ("\n");
982 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 0, "",
983 "Display a list of all processes.\n\
984 \(Any processes listed as Exited or Signaled are actually eliminated\n\
985 after the listing is made.)")
988 internal_with_output_to_temp_buffer ("*Process List*",
989 list_processes_1
, Qnil
);
993 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
994 "Return a list of all processes.")
997 return Fmapcar (Qcdr
, Vprocess_alist
);
1000 /* Starting asynchronous inferior processes. */
1002 static Lisp_Object
start_process_unwind ();
1004 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1005 "Start a program in a subprocess. Return the process object for it.\n\
1006 Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\
1007 NAME is name for process. It is modified if necessary to make it unique.\n\
1008 BUFFER is the buffer or (buffer-name) to associate with the process.\n\
1009 Process output goes at end of that buffer, unless you specify\n\
1010 an output stream or filter function to handle the output.\n\
1011 BUFFER may be also nil, meaning that this process is not associated\n\
1013 Third arg is program file name. It is searched for as in the shell.\n\
1014 Remaining arguments are strings to give program as arguments.")
1017 register Lisp_Object
*args
;
1019 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1021 register unsigned char *new_argv
;
1024 register unsigned char **new_argv
;
1027 int count
= specpdl_ptr
- specpdl
;
1031 buffer
= Fget_buffer_create (buffer
);
1033 /* Make sure that the child will be able to chdir to the current
1034 buffer's current directory, or its unhandled equivalent. We
1035 can't just have the child check for an error when it does the
1036 chdir, since it's in a vfork.
1038 We have to GCPRO around this because Fexpand_file_name and
1039 Funhandled_file_name_directory might call a file name handling
1040 function. The argument list is protected by the caller, so all
1041 we really have to worry about is buffer. */
1043 struct gcpro gcpro1
, gcpro2
;
1045 current_dir
= current_buffer
->directory
;
1047 GCPRO2 (buffer
, current_dir
);
1050 = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir
),
1052 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1053 report_file_error ("Setting current directory",
1054 Fcons (current_buffer
->directory
, Qnil
));
1060 CHECK_STRING (name
, 0);
1064 CHECK_STRING (program
, 2);
1067 /* Make a one member argv with all args concatenated
1068 together separated by a blank. */
1069 len
= XSTRING (program
)->size
+ 2;
1070 for (i
= 3; i
< nargs
; i
++)
1073 CHECK_STRING (tem
, i
);
1074 len
+= XSTRING (tem
)->size
+ 1; /* count the blank */
1076 new_argv
= (unsigned char *) alloca (len
);
1077 strcpy (new_argv
, XSTRING (program
)->data
);
1078 for (i
= 3; i
< nargs
; i
++)
1081 CHECK_STRING (tem
, i
);
1082 strcat (new_argv
, " ");
1083 strcat (new_argv
, XSTRING (tem
)->data
);
1085 /* Need to add code here to check for program existence on VMS */
1088 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1090 /* If program file name is not absolute, search our path for it */
1091 if (!IS_DIRECTORY_SEP (XSTRING (program
)->data
[0])
1092 && !(XSTRING (program
)->size
> 1
1093 && IS_DEVICE_SEP (XSTRING (program
)->data
[1])))
1095 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1098 GCPRO4 (name
, program
, buffer
, current_dir
);
1099 openp (Vexec_path
, program
, EXEC_SUFFIXES
, &tem
, 1);
1102 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1103 tem
= Fexpand_file_name (tem
, Qnil
);
1104 new_argv
[0] = XSTRING (tem
)->data
;
1108 if (!NILP (Ffile_directory_p (program
)))
1109 error ("Specified program for new process is a directory");
1111 new_argv
[0] = XSTRING (program
)->data
;
1114 for (i
= 3; i
< nargs
; i
++)
1117 CHECK_STRING (tem
, i
);
1118 new_argv
[i
- 2] = XSTRING (tem
)->data
;
1120 new_argv
[i
- 2] = 0;
1121 #endif /* not VMS */
1123 proc
= make_process (name
);
1124 /* If an error occurs and we can't start the process, we want to
1125 remove it from the process list. This means that each error
1126 check in create_process doesn't need to call remove_process
1127 itself; it's all taken care of here. */
1128 record_unwind_protect (start_process_unwind
, proc
);
1130 XPROCESS (proc
)->childp
= Qt
;
1131 XPROCESS (proc
)->command_channel_p
= Qnil
;
1132 XPROCESS (proc
)->buffer
= buffer
;
1133 XPROCESS (proc
)->sentinel
= Qnil
;
1134 XPROCESS (proc
)->filter
= Qnil
;
1135 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1137 /* Make the process marker point into the process buffer (if any). */
1139 Fset_marker (XPROCESS (proc
)->mark
,
1140 make_number (BUF_ZV (XBUFFER (buffer
))), buffer
);
1142 create_process (proc
, new_argv
, current_dir
);
1144 return unbind_to (count
, proc
);
1147 /* This function is the unwind_protect form for Fstart_process. If
1148 PROC doesn't have its pid set, then we know someone has signaled
1149 an error and the process wasn't started successfully, so we should
1150 remove it from the process list. */
1152 start_process_unwind (proc
)
1155 if (!PROCESSP (proc
))
1158 /* Was PROC started successfully? */
1159 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1160 remove_process (proc
);
1167 create_process_1 (signo
)
1171 /* USG systems forget handlers when they are used;
1172 must reestablish each time */
1173 signal (signo
, create_process_1
);
1177 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1180 /* Mimic blocking of signals on system V, which doesn't really have it. */
1182 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1183 int sigchld_deferred
;
1186 create_process_sigchld ()
1188 signal (SIGCHLD
, create_process_sigchld
);
1190 sigchld_deferred
= 1;
1196 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1197 create_process (process
, new_argv
, current_dir
)
1198 Lisp_Object process
;
1200 Lisp_Object current_dir
;
1202 int pid
, inchannel
, outchannel
;
1204 #ifdef POSIX_SIGNALS
1207 struct sigaction sigint_action
;
1208 struct sigaction sigquit_action
;
1210 struct sigaction sighup_action
;
1212 #else /* !POSIX_SIGNALS */
1214 SIGTYPE (*sigchld
)();
1216 #endif /* !POSIX_SIGNALS */
1217 /* Use volatile to protect variables from being clobbered by longjmp. */
1218 volatile int forkin
, forkout
;
1219 volatile int pty_flag
= 0;
1220 extern char **environ
;
1222 inchannel
= outchannel
= -1;
1225 if (!NILP (Vprocess_connection_type
))
1226 outchannel
= inchannel
= allocate_pty ();
1231 /* On USG systems it does not work to open the pty's tty here
1232 and then close and reopen it in the child. */
1234 /* Don't let this terminal become our controlling terminal
1235 (in case we don't have one). */
1236 forkout
= forkin
= open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1238 forkout
= forkin
= open (pty_name
, O_RDWR
, 0);
1241 report_file_error ("Opening pty", Qnil
);
1243 forkin
= forkout
= -1;
1244 #endif /* not USG */
1248 #endif /* HAVE_PTYS */
1251 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1252 report_file_error ("Opening socketpair", Qnil
);
1253 outchannel
= inchannel
= sv
[0];
1254 forkout
= forkin
= sv
[1];
1256 #else /* not SKTPAIR */
1259 pipe_with_inherited_out (sv
);
1263 pipe_with_inherited_in (sv
);
1266 #else /* not WINDOWSNT */
1273 #endif /* not WINDOWSNT */
1275 #endif /* not SKTPAIR */
1278 /* Replaced by close_process_descs */
1279 set_exclusive_use (inchannel
);
1280 set_exclusive_use (outchannel
);
1283 /* Stride people say it's a mystery why this is needed
1284 as well as the O_NDELAY, but that it fails without this. */
1285 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1288 ioctl (inchannel
, FIONBIO
, &one
);
1293 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1294 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1297 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1298 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1302 /* Record this as an active process, with its channels.
1303 As a result, child_setup will close Emacs's side of the pipes. */
1304 chan_process
[inchannel
] = process
;
1305 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1306 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1307 /* Record the tty descriptor used in the subprocess. */
1309 XPROCESS (process
)->subtty
= Qnil
;
1311 XSETFASTINT (XPROCESS (process
)->subtty
, forkin
);
1312 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1313 XPROCESS (process
)->status
= Qrun
;
1315 /* Delay interrupts until we have a chance to store
1316 the new fork's pid in its process structure */
1317 #ifdef POSIX_SIGNALS
1318 sigemptyset (&blocked
);
1320 sigaddset (&blocked
, SIGCHLD
);
1323 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1324 this sets the parent's signal handlers as well as the child's.
1325 So delay all interrupts whose handlers the child might munge,
1326 and record the current handlers so they can be restored later. */
1327 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1328 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1330 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1332 #endif /* HAVE_VFORK */
1333 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1334 #else /* !POSIX_SIGNALS */
1338 #else /* not BSD4_1 */
1339 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1340 sigsetmask (sigmask (SIGCHLD
));
1341 #else /* ordinary USG */
1343 sigchld_deferred
= 0;
1344 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1346 #endif /* ordinary USG */
1347 #endif /* not BSD4_1 */
1348 #endif /* SIGCHLD */
1349 #endif /* !POSIX_SIGNALS */
1351 FD_SET (inchannel
, &input_wait_mask
);
1352 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1353 if (inchannel
> max_process_desc
)
1354 max_process_desc
= inchannel
;
1356 /* Until we store the proper pid, enable sigchld_handler
1357 to recognize an unknown pid as standing for this process.
1358 It is very important not to let this `marker' value stay
1359 in the table after this function has returned; if it does
1360 it might cause call-process to hang and subsequent asynchronous
1361 processes to get their return values scrambled. */
1362 XSETINT (XPROCESS (process
)->pid
, -1);
1365 /* child_setup must clobber environ on systems with true vfork.
1366 Protect it from permanent change. */
1367 char **save_environ
= environ
;
1372 #endif /* not WINDOWSNT */
1374 int xforkin
= forkin
;
1375 int xforkout
= forkout
;
1377 #if 0 /* This was probably a mistake--it duplicates code later on,
1378 but fails to handle all the cases. */
1379 /* Make sure SIGCHLD is not blocked in the child. */
1380 sigsetmask (SIGEMPTYMASK
);
1383 /* Make the pty be the controlling terminal of the process. */
1385 /* First, disconnect its current controlling terminal. */
1387 /* We tried doing setsid only if pty_flag, but it caused
1388 process_set_signal to fail on SGI when using a pipe. */
1390 /* Make the pty's terminal the controlling terminal. */
1394 /* We ignore the return value
1395 because faith@cs.unc.edu says that is necessary on Linux. */
1396 ioctl (xforkin
, TIOCSCTTY
, 0);
1399 #else /* not HAVE_SETSID */
1401 /* It's very important to call setpgrp here and no time
1402 afterwards. Otherwise, we lose our controlling tty which
1403 is set when we open the pty. */
1406 #endif /* not HAVE_SETSID */
1407 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1408 if (pty_flag
&& xforkin
>= 0)
1411 tcgetattr (xforkin
, &t
);
1413 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1414 write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1417 #if defined (NTTYDISC) && defined (TIOCSETD)
1418 if (pty_flag
&& xforkin
>= 0)
1420 /* Use new line discipline. */
1421 int ldisc
= NTTYDISC
;
1422 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1427 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1428 can do TIOCSPGRP only to the process's controlling tty. */
1431 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1432 I can't test it since I don't have 4.3. */
1433 int j
= open ("/dev/tty", O_RDWR
, 0);
1434 ioctl (j
, TIOCNOTTY
, 0);
1437 /* In order to get a controlling terminal on some versions
1438 of BSD, it is necessary to put the process in pgrp 0
1439 before it opens the terminal. */
1447 #endif /* TIOCNOTTY */
1449 #if !defined (RTU) && !defined (UNIPLUS)
1450 /*** There is a suggestion that this ought to be a
1451 conditional on TIOCSPGRP. */
1452 /* Now close the pty (if we had it open) and reopen it.
1453 This makes the pty the controlling terminal of the subprocess. */
1456 #ifdef SET_CHILD_PTY_PGRP
1457 int pgrp
= getpid ();
1460 /* I wonder if close (open (pty_name, ...)) would work? */
1463 xforkout
= xforkin
= open (pty_name
, O_RDWR
, 0);
1467 write (1, "Couldn't open the pty terminal ", 31);
1468 write (1, pty_name
, strlen (pty_name
));
1473 #ifdef SET_CHILD_PTY_PGRP
1474 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1475 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1478 #endif /* not UNIPLUS and not RTU */
1479 #ifdef SETUP_SLAVE_PTY
1484 #endif /* SETUP_SLAVE_PTY */
1486 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1487 Now reenable it in the child, so it will die when we want it to. */
1489 signal (SIGHUP
, SIG_DFL
);
1491 #endif /* HAVE_PTYS */
1493 signal (SIGINT
, SIG_DFL
);
1494 signal (SIGQUIT
, SIG_DFL
);
1496 /* Stop blocking signals in the child. */
1497 #ifdef POSIX_SIGNALS
1498 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1499 #else /* !POSIX_SIGNALS */
1503 #else /* not BSD4_1 */
1504 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1505 sigsetmask (SIGEMPTYMASK
);
1506 #else /* ordinary USG */
1508 signal (SIGCHLD
, sigchld
);
1510 #endif /* ordinary USG */
1511 #endif /* not BSD4_1 */
1512 #endif /* SIGCHLD */
1513 #endif /* !POSIX_SIGNALS */
1516 child_setup_tty (xforkout
);
1518 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1519 new_argv
, 1, current_dir
);
1520 #else /* not WINDOWSNT */
1521 child_setup (xforkin
, xforkout
, xforkout
,
1522 new_argv
, 1, current_dir
);
1523 #endif /* not WINDOWSNT */
1525 environ
= save_environ
;
1528 /* This runs in the Emacs process. */
1533 if (forkin
!= forkout
&& forkout
>= 0)
1538 /* vfork succeeded. */
1539 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
1542 register_child (pid
, inchannel
);
1543 #endif /* WINDOWSNT */
1545 /* If the subfork execv fails, and it exits,
1546 this close hangs. I don't know why.
1547 So have an interrupt jar it loose. */
1549 signal (SIGALRM
, create_process_1
);
1551 XPROCESS (process
)->subtty
= Qnil
;
1556 if (forkin
!= forkout
&& forkout
>= 0)
1561 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1564 XPROCESS (process
)->tty_name
= Qnil
;
1567 /* Restore the signal state whether vfork succeeded or not.
1568 (We will signal an error, below, if it failed.) */
1569 #ifdef POSIX_SIGNALS
1571 /* Restore the parent's signal handlers. */
1572 sigaction (SIGINT
, &sigint_action
, 0);
1573 sigaction (SIGQUIT
, &sigquit_action
, 0);
1575 sigaction (SIGHUP
, &sighup_action
, 0);
1577 #endif /* HAVE_VFORK */
1578 /* Stop blocking signals in the parent. */
1579 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1580 #else /* !POSIX_SIGNALS */
1584 #else /* not BSD4_1 */
1585 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1586 sigsetmask (SIGEMPTYMASK
);
1587 #else /* ordinary USG */
1589 signal (SIGCHLD
, sigchld
);
1590 /* Now really handle any of these signals
1591 that came in during this function. */
1592 if (sigchld_deferred
)
1593 kill (getpid (), SIGCHLD
);
1595 #endif /* ordinary USG */
1596 #endif /* not BSD4_1 */
1597 #endif /* SIGCHLD */
1598 #endif /* !POSIX_SIGNALS */
1600 /* Now generate the error if vfork failed. */
1602 report_file_error ("Doing vfork", Qnil
);
1604 #endif /* not VMS */
1608 /* open a TCP network connection to a given HOST/SERVICE. Treated
1609 exactly like a normal process when reading and writing. Only
1610 differences are in status display and process deletion. A network
1611 connection has no PID; you cannot signal it. All you can do is
1612 deactivate and close it via delete-process */
1614 DEFUN ("open-network-stream", Fopen_network_stream
, Sopen_network_stream
,
1616 "Open a TCP connection for a service to a host.\n\
1617 Returns a subprocess-object to represent the connection.\n\
1618 Input and output work as for subprocesses; `delete-process' closes it.\n\
1619 Args are NAME BUFFER HOST SERVICE.\n\
1620 NAME is name for process. It is modified if necessary to make it unique.\n\
1621 BUFFER is the buffer (or buffer-name) to associate with the process.\n\
1622 Process output goes at end of that buffer, unless you specify\n\
1623 an output stream or filter function to handle the output.\n\
1624 BUFFER may be also nil, meaning that this process is not associated\n\
1626 Third arg is name of the host to connect to, or its IP address.\n\
1627 Fourth arg SERVICE is name of the service desired, or an integer\n\
1628 specifying a port number to connect to.")
1629 (name
, buffer
, host
, service
)
1630 Lisp_Object name
, buffer
, host
, service
;
1634 struct sockaddr_in address
;
1635 struct servent
*svc_info
;
1636 struct hostent
*host_info_ptr
, host_info
;
1637 char *(addr_list
[2]);
1638 IN_ADDR numeric_addr
;
1642 struct hostent host_info_fixed
;
1643 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1645 int count
= specpdl_ptr
- specpdl
;
1647 GCPRO4 (name
, buffer
, host
, service
);
1648 CHECK_STRING (name
, 0);
1649 CHECK_STRING (host
, 0);
1650 if (INTEGERP (service
))
1651 port
= htons ((unsigned short) XINT (service
));
1654 CHECK_STRING (service
, 0);
1655 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
1657 error ("Unknown service \"%s\"", XSTRING (service
)->data
);
1658 port
= svc_info
->s_port
;
1661 /* Slow down polling to every ten seconds.
1662 Some kernels have a bug which causes retrying connect to fail
1663 after a connect. Polling can interfere with gethostbyname too. */
1664 #ifdef POLL_FOR_INPUT
1665 bind_polling_period (10);
1674 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
1676 if (! (host_info_ptr
== 0 && h_errno
== TRY_AGAIN
))
1679 Fsleep_for (make_number (1), Qnil
);
1681 if (host_info_ptr
== 0)
1682 /* Attempt to interpret host as numeric inet address */
1684 numeric_addr
= inet_addr ((char *) XSTRING (host
)->data
);
1685 if (NUMERIC_ADDR_ERROR
)
1686 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
1688 host_info_ptr
= &host_info
;
1689 host_info
.h_name
= 0;
1690 host_info
.h_aliases
= 0;
1691 host_info
.h_addrtype
= AF_INET
;
1693 /* Older machines have only one address slot called h_addr.
1694 Newer machines have h_addr_list, but #define h_addr to
1695 be its first element. */
1696 host_info
.h_addr_list
= &(addr_list
[0]);
1698 host_info
.h_addr
= (char*)(&numeric_addr
);
1700 host_info
.h_length
= strlen (addr_list
[0]);
1703 bzero (&address
, sizeof address
);
1704 bcopy (host_info_ptr
->h_addr
, (char *) &address
.sin_addr
,
1705 host_info_ptr
->h_length
);
1706 address
.sin_family
= host_info_ptr
->h_addrtype
;
1707 address
.sin_port
= port
;
1709 s
= socket (host_info_ptr
->h_addrtype
, SOCK_STREAM
, 0);
1711 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1713 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
1714 when connect is interrupted. So let's not let it get interrupted.
1715 Note we do not turn off polling, because polling is only used
1716 when not interrupt_input, and thus not normally used on the systems
1717 which have this bug. On systems which use polling, there's no way
1718 to quit if polling is turned off. */
1719 if (interrupt_input
)
1723 if (connect (s
, (struct sockaddr
*) &address
, sizeof address
) == -1
1724 && errno
!= EISCONN
)
1730 if (errno
== EADDRINUSE
&& retry
< 20)
1732 /* A delay here is needed on some FreeBSD systems,
1733 and it is harmless, since this retrying takes time anyway
1734 and should be infrequent. */
1735 Fsleep_for (make_number (1), Qnil
);
1742 if (interrupt_input
)
1746 report_file_error ("connection failed",
1747 Fcons (host
, Fcons (name
, Qnil
)));
1750 #ifdef POLL_FOR_INPUT
1751 unbind_to (count
, Qnil
);
1754 if (interrupt_input
)
1758 s
= connect_server (0);
1760 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1761 send_command (s
, C_PORT
, 0, "%s:%d", XSTRING (host
)->data
, ntohs (port
));
1762 send_command (s
, C_DUMB
, 1, 0);
1768 report_file_error ("error duplicating socket", Fcons (name
, Qnil
));
1771 buffer
= Fget_buffer_create (buffer
);
1772 proc
= make_process (name
);
1774 chan_process
[inch
] = proc
;
1777 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
1780 fcntl (inch
, F_SETFL
, O_NDELAY
);
1784 XPROCESS (proc
)->childp
= host
;
1785 XPROCESS (proc
)->command_channel_p
= Qnil
;
1786 XPROCESS (proc
)->buffer
= buffer
;
1787 XPROCESS (proc
)->sentinel
= Qnil
;
1788 XPROCESS (proc
)->filter
= Qnil
;
1789 XPROCESS (proc
)->command
= Qnil
;
1790 XPROCESS (proc
)->pid
= Qnil
;
1791 XSETINT (XPROCESS (proc
)->infd
, s
);
1792 XSETINT (XPROCESS (proc
)->outfd
, outch
);
1793 XPROCESS (proc
)->status
= Qrun
;
1794 FD_SET (inch
, &input_wait_mask
);
1795 FD_SET (inch
, &non_keyboard_wait_mask
);
1796 if (inch
> max_process_desc
)
1797 max_process_desc
= inch
;
1802 #endif /* HAVE_SOCKETS */
1804 deactivate_process (proc
)
1807 register int inchannel
, outchannel
;
1808 register struct Lisp_Process
*p
= XPROCESS (proc
);
1810 inchannel
= XINT (p
->infd
);
1811 outchannel
= XINT (p
->outfd
);
1815 /* Beware SIGCHLD hereabouts. */
1816 flush_pending_output (inchannel
);
1819 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
1820 sys$
dassgn (outchannel
);
1821 vs
= get_vms_process_pointer (p
->pid
);
1823 give_back_vms_process_stuff (vs
);
1827 if (outchannel
>= 0 && outchannel
!= inchannel
)
1831 XSETINT (p
->infd
, -1);
1832 XSETINT (p
->outfd
, -1);
1833 chan_process
[inchannel
] = Qnil
;
1834 FD_CLR (inchannel
, &input_wait_mask
);
1835 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
1836 if (inchannel
== max_process_desc
)
1839 /* We just closed the highest-numbered process input descriptor,
1840 so recompute the highest-numbered one now. */
1841 max_process_desc
= 0;
1842 for (i
= 0; i
< MAXDESC
; i
++)
1843 if (!NILP (chan_process
[i
]))
1844 max_process_desc
= i
;
1849 /* Close all descriptors currently in use for communication
1850 with subprocess. This is used in a newly-forked subprocess
1851 to get rid of irrelevant descriptors. */
1853 close_process_descs ()
1857 for (i
= 0; i
< MAXDESC
; i
++)
1859 Lisp_Object process
;
1860 process
= chan_process
[i
];
1861 if (!NILP (process
))
1863 int in
= XINT (XPROCESS (process
)->infd
);
1864 int out
= XINT (XPROCESS (process
)->outfd
);
1867 if (out
>= 0 && in
!= out
)
1874 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
1876 "Allow any pending output from subprocesses to be read by Emacs.\n\
1877 It is read into the process' buffers or given to their filter functions.\n\
1878 Non-nil arg PROCESS means do not return until some output has been received\n\
1880 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
1881 seconds and microseconds to wait; return after that much time whether\n\
1882 or not there is input.\n\
1883 Return non-nil iff we received any output before the timeout expired.")
1884 (process
, timeout
, timeout_msecs
)
1885 register Lisp_Object process
, timeout
, timeout_msecs
;
1890 if (! NILP (timeout_msecs
))
1892 CHECK_NUMBER (timeout_msecs
, 2);
1893 useconds
= XINT (timeout_msecs
);
1894 if (!INTEGERP (timeout
))
1895 XSETINT (timeout
, 0);
1898 int carry
= useconds
/ 1000000;
1900 XSETINT (timeout
, XINT (timeout
) + carry
);
1901 useconds
-= carry
* 1000000;
1903 /* I think this clause is necessary because C doesn't
1904 guarantee a particular rounding direction for negative
1908 XSETINT (timeout
, XINT (timeout
) - 1);
1909 useconds
+= 1000000;
1916 if (! NILP (timeout
))
1918 CHECK_NUMBER (timeout
, 1);
1919 seconds
= XINT (timeout
);
1932 XSETFASTINT (process
, 0);
1935 (wait_reading_process_input (seconds
, useconds
, process
, 0)
1939 /* This variable is different from waiting_for_input in keyboard.c.
1940 It is used to communicate to a lisp process-filter/sentinel (via the
1941 function Fwaiting_for_user_input_p below) whether emacs was waiting
1942 for user-input when that process-filter was called.
1943 waiting_for_input cannot be used as that is by definition 0 when
1944 lisp code is being evalled.
1945 This is also used in record_asynch_buffer_change.
1946 For that purpose, this must be 0
1947 when not inside wait_reading_process_input. */
1948 static int waiting_for_user_input_p
;
1950 /* Read and dispose of subprocess output while waiting for timeout to
1951 elapse and/or keyboard input to be available.
1954 timeout in seconds, or
1955 zero for no limit, or
1956 -1 means gobble data immediately available but don't wait for any.
1959 an additional duration to wait, measured in microseconds.
1960 If this is nonzero and time_limit is 0, then the timeout
1961 consists of MICROSECS only.
1963 READ_KBD is a lisp value:
1964 0 to ignore keyboard input, or
1965 1 to return when input is available, or
1966 -1 meaning caller will actually read the input, so don't throw to
1967 the quit handler, or
1968 a cons cell, meaning wait until its car is non-nil
1969 (and gobble terminal input into the buffer if any arrives), or
1970 a process object, meaning wait until something arrives from that
1971 process. The return value is true iff we read some input from
1974 DO_DISPLAY != 0 means redisplay should be done to show subprocess
1975 output that arrives.
1977 If READ_KBD is a pointer to a struct Lisp_Process, then the
1978 function returns true iff we received input from that process
1979 before the timeout elapsed.
1980 Otherwise, return true iff we received input from any process. */
1982 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
1983 int time_limit
, microsecs
;
1984 Lisp_Object read_kbd
;
1987 register int channel
, nfds
, m
;
1988 static SELECT_TYPE Available
;
1991 EMACS_TIME timeout
, end_time
, garbage
;
1993 int wait_channel
= -1;
1994 struct Lisp_Process
*wait_proc
= 0;
1995 int got_some_input
= 0;
1996 Lisp_Object
*wait_for_cell
= 0;
1998 FD_ZERO (&Available
);
2000 /* If read_kbd is a process to watch, set wait_proc and wait_channel
2002 if (PROCESSP (read_kbd
))
2004 wait_proc
= XPROCESS (read_kbd
);
2005 wait_channel
= XINT (wait_proc
->infd
);
2006 XSETFASTINT (read_kbd
, 0);
2009 /* If waiting for non-nil in a cell, record where. */
2010 if (CONSP (read_kbd
))
2012 wait_for_cell
= &XCONS (read_kbd
)->car
;
2013 XSETFASTINT (read_kbd
, 0);
2016 waiting_for_user_input_p
= XINT (read_kbd
);
2018 /* Since we may need to wait several times,
2019 compute the absolute time to return at. */
2020 if (time_limit
|| microsecs
)
2022 EMACS_GET_TIME (end_time
);
2023 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
2024 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
2029 int timeout_reduced_for_timers
= 0;
2031 /* If calling from keyboard input, do not quit
2032 since we want to return C-g as an input character.
2033 Otherwise, do pending quit if requested. */
2034 if (XINT (read_kbd
) >= 0)
2037 /* Exit now if the cell we're waiting for became non-nil. */
2038 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2041 /* Compute time from now till when time limit is up */
2042 /* Exit if already run out */
2043 if (time_limit
== -1)
2045 /* -1 specified for timeout means
2046 gobble output available now
2047 but don't wait at all. */
2049 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2051 else if (time_limit
|| microsecs
)
2053 EMACS_GET_TIME (timeout
);
2054 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
2055 if (EMACS_TIME_NEG_P (timeout
))
2060 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
2063 /* If our caller will not immediately handle keyboard events,
2064 run timer events directly.
2065 (Callers that will immediately read keyboard events
2066 call timer_delay on their own.) */
2069 EMACS_TIME timer_delay
;
2070 timer_delay
= timer_check (1);
2071 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
2073 EMACS_TIME difference
;
2074 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
2075 if (EMACS_TIME_NEG_P (difference
))
2077 timeout
= timer_delay
;
2078 timeout_reduced_for_timers
= 1;
2083 /* Cause C-g and alarm signals to take immediate action,
2084 and cause input available signals to zero out timeout.
2086 It is important that we do this before checking for process
2087 activity. If we get a SIGCHLD after the explicit checks for
2088 process activity, timeout is the only way we will know. */
2089 if (XINT (read_kbd
) < 0)
2090 set_waiting_for_input (&timeout
);
2092 /* If status of something has changed, and no input is
2093 available, notify the user of the change right away. After
2094 this explicit check, we'll let the SIGCHLD handler zap
2095 timeout to get our attention. */
2096 if (update_tick
!= process_tick
&& do_display
)
2098 Atemp
= input_wait_mask
;
2099 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2100 if ((select (MAXDESC
, &Atemp
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2104 /* It's okay for us to do this and then continue with
2105 the loop, since timeout has already been zeroed out. */
2106 clear_waiting_for_input ();
2111 /* Don't wait for output from a non-running process. */
2112 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
2113 update_status (wait_proc
);
2115 && ! EQ (wait_proc
->status
, Qrun
))
2117 clear_waiting_for_input ();
2121 /* Wait till there is something to do */
2123 if (! XINT (read_kbd
) && wait_for_cell
== 0)
2124 Available
= non_keyboard_wait_mask
;
2126 Available
= input_wait_mask
;
2128 /* If frame size has changed or the window is newly mapped,
2129 redisplay now, before we start to wait. There is a race
2130 condition here; if a SIGIO arrives between now and the select
2131 and indicates that a frame is trashed, the select may block
2132 displaying a trashed screen. */
2133 if (frame_garbaged
&& do_display
)
2135 clear_waiting_for_input ();
2136 redisplay_preserve_echo_area ();
2137 if (XINT (read_kbd
) < 0)
2138 set_waiting_for_input (&timeout
);
2141 if (XINT (read_kbd
) && detect_input_pending ())
2144 FD_ZERO (&Available
);
2147 nfds
= select (MAXDESC
, &Available
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2152 /* Make C-g and alarm signals set flags again */
2153 clear_waiting_for_input ();
2155 /* If we woke up due to SIGWINCH, actually change size now. */
2156 do_pending_window_change ();
2158 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
2159 /* We wanted the full specified time, so return now. */
2163 if (xerrno
== EINTR
)
2164 FD_ZERO (&Available
);
2166 /* Ultrix select seems to return ENOMEM when it is
2167 interrupted. Treat it just like EINTR. Bleah. Note
2168 that we want to test for the "ultrix" CPP symbol, not
2169 "__ultrix__"; the latter is only defined under GCC, but
2170 not by DEC's bundled CC. -JimB */
2171 else if (xerrno
== ENOMEM
)
2172 FD_ZERO (&Available
);
2175 /* This happens for no known reason on ALLIANT.
2176 I am guessing that this is the right response. -- RMS. */
2177 else if (xerrno
== EFAULT
)
2178 FD_ZERO (&Available
);
2180 else if (xerrno
== EBADF
)
2183 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
2184 the child's closure of the pts gives the parent a SIGHUP, and
2185 the ptc file descriptor is automatically closed,
2186 yielding EBADF here or at select() call above.
2187 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
2188 in m/ibmrt-aix.h), and here we just ignore the select error.
2189 Cleanup occurs c/o status_notify after SIGCLD. */
2190 FD_ZERO (&Available
); /* Cannot depend on values returned */
2196 error("select error: %s", strerror (xerrno
));
2198 #if defined(sun) && !defined(USG5_4)
2199 else if (nfds
> 0 && keyboard_bit_set (&Available
)
2201 /* System sometimes fails to deliver SIGIO.
2203 David J. Mackenzie says that Emacs doesn't compile under
2204 Solaris if this code is enabled, thus the USG5_4 in the CPP
2205 conditional. "I haven't noticed any ill effects so far.
2206 If you find a Solaris expert somewhere, they might know
2208 kill (getpid (), SIGIO
);
2211 /* Check for keyboard input */
2212 /* If there is any, return immediately
2213 to give it higher priority than subprocesses */
2215 /* We used to do this if wait_for_cell,
2216 but that caused infinite recursion in selection request events. */
2217 if ((XINT (read_kbd
) || wait_for_cell
)
2218 && detect_input_pending ())
2221 if (detect_input_pending ())
2225 /* Exit now if the cell we're waiting for became non-nil. */
2226 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2230 /* If we think we have keyboard input waiting, but didn't get SIGIO
2231 go read it. This can happen with X on BSD after logging out.
2232 In that case, there really is no input and no SIGIO,
2233 but select says there is input. */
2235 if (XINT (read_kbd
) && interrupt_input
2236 && (keyboard_bit_set (&Available
)))
2241 got_some_input
|= nfds
> 0;
2243 /* If checking input just got us a size-change event from X,
2244 obey it now if we should. */
2245 if (XINT (read_kbd
) || wait_for_cell
)
2246 do_pending_window_change ();
2248 /* Check for data from a process. */
2249 /* Really FIRST_PROC_DESC should be 0 on Unix,
2250 but this is safer in the short run. */
2251 for (channel
= 0; channel
<= max_process_desc
; channel
++)
2253 if (FD_ISSET (channel
, &Available
)
2254 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
2258 /* If waiting for this channel, arrange to return as
2259 soon as no more input to be processed. No more
2261 if (wait_channel
== channel
)
2267 proc
= chan_process
[channel
];
2271 /* Read data from the process, starting with our
2272 buffered-ahead character if we have one. */
2274 nread
= read_process_output (proc
, channel
);
2277 /* Since read_process_output can run a filter,
2278 which can call accept-process-output,
2279 don't try to read from any other processes
2280 before doing the select again. */
2281 FD_ZERO (&Available
);
2284 redisplay_preserve_echo_area ();
2287 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2291 else if (nread
== -1 && errno
== EAGAIN
)
2295 else if (nread
== -1 && errno
== EAGAIN
)
2297 /* Note that we cannot distinguish between no input
2298 available now and a closed pipe.
2299 With luck, a closed pipe will be accompanied by
2300 subprocess termination and SIGCHLD. */
2301 else if (nread
== 0 && !NETCONN_P (proc
))
2303 #endif /* O_NDELAY */
2304 #endif /* O_NONBLOCK */
2305 #endif /* EWOULDBLOCK */
2307 /* On some OSs with ptys, when the process on one end of
2308 a pty exits, the other end gets an error reading with
2309 errno = EIO instead of getting an EOF (0 bytes read).
2310 Therefore, if we get an error reading and errno =
2311 EIO, just continue, because the child process has
2312 exited and should clean itself up soon (e.g. when we
2314 else if (nread
== -1 && errno
== EIO
)
2316 #endif /* HAVE_PTYS */
2317 /* If we can detect process termination, don't consider the process
2318 gone just because its pipe is closed. */
2320 else if (nread
== 0 && !NETCONN_P (proc
))
2325 /* Preserve status of processes already terminated. */
2326 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2327 deactivate_process (proc
);
2328 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2329 update_status (XPROCESS (proc
));
2330 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2331 XPROCESS (proc
)->status
2332 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2335 } /* end for each file descriptor */
2336 } /* end while exit conditions not met */
2338 waiting_for_user_input_p
= 0;
2340 /* If calling from keyboard input, do not quit
2341 since we want to return C-g as an input character.
2342 Otherwise, do pending quit if requested. */
2343 if (XINT (read_kbd
) >= 0)
2345 /* Prevent input_pending from remaining set if we quit. */
2346 clear_input_pending ();
2350 return got_some_input
;
2353 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
2356 read_process_output_call (fun_and_args
)
2357 Lisp_Object fun_and_args
;
2359 return apply1 (XCONS (fun_and_args
)->car
, XCONS (fun_and_args
)->cdr
);
2363 read_process_output_error_handler (error
)
2366 cmd_error_internal (error
, "error in process filter: ");
2368 update_echo_area ();
2369 Fsleep_for (make_number (2), Qnil
);
2372 /* Read pending output from the process channel,
2373 starting with our buffered-ahead character if we have one.
2374 Yield number of characters read.
2376 This function reads at most 1024 characters.
2377 If you want to read all available subprocess output,
2378 you must call it repeatedly until it returns zero. */
2380 read_process_output (proc
, channel
)
2382 register int channel
;
2384 register int nchars
;
2390 register Lisp_Object outstream
;
2391 register struct buffer
*old
= current_buffer
;
2392 register struct Lisp_Process
*p
= XPROCESS (proc
);
2393 register int opoint
;
2396 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2398 vs
= get_vms_process_pointer (p
->pid
);
2402 return(0); /* Really weird if it does this */
2403 if (!(vs
->iosb
[0] & 1))
2404 return -1; /* I/O error */
2407 error ("Could not get VMS process pointer");
2408 chars
= vs
->inputBuffer
;
2409 nchars
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2412 start_vms_process_read (vs
); /* Crank up the next read on the process */
2413 return 1; /* Nothing worth printing, say we got 1 */
2417 if (proc_buffered_char
[channel
] < 0)
2419 nchars
= read_child_output (channel
, chars
, sizeof (chars
));
2421 nchars
= read (channel
, chars
, sizeof chars
);
2425 chars
[0] = proc_buffered_char
[channel
];
2426 proc_buffered_char
[channel
] = -1;
2428 nchars
= read_child_output (channel
, chars
+ 1, sizeof (chars
) - 1);
2430 nchars
= read (channel
, chars
+ 1, sizeof chars
- 1);
2435 nchars
= nchars
+ 1;
2437 #endif /* not VMS */
2439 if (nchars
<= 0) return nchars
;
2441 outstream
= p
->filter
;
2442 if (!NILP (outstream
))
2444 /* We inhibit quit here instead of just catching it so that
2445 hitting ^G when a filter happens to be running won't screw
2447 int count
= specpdl_ptr
- specpdl
;
2448 Lisp_Object odeactivate
;
2449 Lisp_Object obuffer
, okeymap
;
2451 /* No need to gcpro these, because all we do with them later
2452 is test them for EQness, and none of them should be a string. */
2453 odeactivate
= Vdeactivate_mark
;
2454 XSETBUFFER (obuffer
, current_buffer
);
2455 okeymap
= current_buffer
->keymap
;
2457 specbind (Qinhibit_quit
, Qt
);
2458 specbind (Qlast_nonmenu_event
, Qt
);
2460 running_asynch_code
= 1;
2461 internal_condition_case_1 (read_process_output_call
,
2464 Fcons (make_string (chars
,
2467 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
2468 read_process_output_error_handler
);
2469 running_asynch_code
= 0;
2470 restore_match_data ();
2472 /* Handling the process output should not deactivate the mark. */
2473 Vdeactivate_mark
= odeactivate
;
2475 #if 0 /* Call record_asynch_buffer_change unconditionally,
2476 because we might have changed minor modes or other things
2477 that affect key bindings. */
2478 if (! EQ (Fcurrent_buffer (), obuffer
)
2479 || ! EQ (current_buffer
->keymap
, okeymap
))
2481 /* But do it only if the caller is actually going to read events.
2482 Otherwise there's no need to make him wake up, and it could
2483 cause trouble (for example it would make Fsit_for return). */
2484 if (waiting_for_user_input_p
== -1)
2485 record_asynch_buffer_change ();
2488 start_vms_process_read (vs
);
2490 unbind_to (count
, Qnil
);
2494 /* If no filter, write into buffer if it isn't dead. */
2495 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2497 Lisp_Object old_read_only
;
2498 Lisp_Object old_begv
, old_zv
;
2499 Lisp_Object odeactivate
;
2501 odeactivate
= Vdeactivate_mark
;
2503 Fset_buffer (p
->buffer
);
2505 old_read_only
= current_buffer
->read_only
;
2506 XSETFASTINT (old_begv
, BEGV
);
2507 XSETFASTINT (old_zv
, ZV
);
2509 current_buffer
->read_only
= Qnil
;
2511 /* Insert new output into buffer
2512 at the current end-of-output marker,
2513 thus preserving logical ordering of input and output. */
2514 if (XMARKER (p
->mark
)->buffer
)
2515 SET_PT (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
));
2519 /* If the output marker is outside of the visible region, save
2520 the restriction and widen. */
2521 if (! (BEGV
<= point
&& point
<= ZV
))
2524 /* Make sure opoint floats ahead of any new text, just as point
2526 if (point
<= opoint
)
2529 /* Insert after old_begv, but before old_zv. */
2530 if (point
< XFASTINT (old_begv
))
2531 XSETFASTINT (old_begv
, XFASTINT (old_begv
) + nchars
);
2532 if (point
<= XFASTINT (old_zv
))
2533 XSETFASTINT (old_zv
, XFASTINT (old_zv
) + nchars
);
2535 /* Insert before markers in case we are inserting where
2536 the buffer's mark is, and the user's next command is Meta-y. */
2537 insert_before_markers (chars
, nchars
);
2538 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
2540 update_mode_lines
++;
2542 /* If the restriction isn't what it should be, set it. */
2543 if (XFASTINT (old_begv
) != BEGV
|| XFASTINT (old_zv
) != ZV
)
2544 Fnarrow_to_region (old_begv
, old_zv
);
2546 /* Handling the process output should not deactivate the mark. */
2547 Vdeactivate_mark
= odeactivate
;
2549 current_buffer
->read_only
= old_read_only
;
2551 set_buffer_internal (old
);
2554 start_vms_process_read (vs
);
2559 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
2561 "Returns non-nil if emacs is waiting for input from the user.\n\
2562 This is intended for use by asynchronous process output filters and sentinels.")
2565 return (waiting_for_user_input_p
? Qt
: Qnil
);
2568 /* Sending data to subprocess */
2570 jmp_buf send_process_frame
;
2573 send_process_trap ()
2579 longjmp (send_process_frame
, 1);
2582 /* Send some data to process PROC.
2583 BUF is the beginning of the data; LEN is the number of characters.
2584 OBJECT is the Lisp object that the data comes from. */
2586 send_process (proc
, buf
, len
, object
)
2587 volatile Lisp_Object proc
;
2592 /* Use volatile to protect variables from being clobbered by longjmp. */
2594 volatile unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
2597 struct Lisp_Process
*p
= XPROCESS (proc
);
2598 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2601 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2602 update_status (XPROCESS (proc
));
2603 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2604 error ("Process %s not running", procname
);
2607 vs
= get_vms_process_pointer (p
->pid
);
2609 error ("Could not find this process: %x", p
->pid
);
2610 else if (write_to_vms_process (vs
, buf
, len
))
2614 if (pty_max_bytes
== 0)
2616 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
2617 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
2619 if (pty_max_bytes
< 0)
2620 pty_max_bytes
= 250;
2622 pty_max_bytes
= 250;
2624 /* Deduct one, to leave space for the eof. */
2628 if (!setjmp (send_process_frame
))
2632 SIGTYPE (*old_sigpipe
)();
2635 /* Decide how much data we can send in one batch.
2636 Long lines need to be split into multiple batches. */
2637 if (!NILP (XPROCESS (proc
)->pty_flag
))
2639 /* Starting this at zero is always correct when not the first iteration
2640 because the previous iteration ended by sending C-d.
2641 It may not be correct for the first iteration
2642 if a partial line was sent in a separate send_process call.
2643 If that proves worth handling, we need to save linepos
2644 in the process object. */
2647 char *end
= buf
+ len
;
2649 /* Scan through this text for a line that is too long. */
2650 while (ptr
!= end
&& linepos
< pty_max_bytes
)
2658 /* If we found one, break the line there
2659 and put in a C-d to force the buffer through. */
2663 /* Send this batch, using one or more write calls. */
2666 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
2667 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
2668 signal (SIGPIPE
, old_sigpipe
);
2674 || errno
== EWOULDBLOCK
2680 /* Buffer is full. Wait, accepting input;
2681 that may allow the program
2682 to finish doing output and read more. */
2687 /* Running filters might relocate buffers or strings.
2688 Arrange to relocate BUF. */
2689 if (BUFFERP (object
))
2690 offset
= BUF_PTR_CHAR_POS (XBUFFER (object
),
2691 (unsigned char *) buf
);
2692 else if (STRINGP (object
))
2693 offset
= buf
- (char *) XSTRING (object
)->data
;
2695 XSETFASTINT (zero
, 0);
2696 wait_reading_process_input (1, 0, zero
, 0);
2698 if (BUFFERP (object
))
2699 buf
= (char *) BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
2700 else if (STRINGP (object
))
2701 buf
= offset
+ (char *) XSTRING (object
)->data
;
2706 /* This is a real error. */
2707 report_file_error ("writing to process", Fcons (proc
, Qnil
));
2714 /* If we sent just part of the string, put in an EOF
2715 to force it through, before we send the rest. */
2717 Fprocess_send_eof (proc
);
2722 XPROCESS (proc
)->raw_status_low
= Qnil
;
2723 XPROCESS (proc
)->raw_status_high
= Qnil
;
2724 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2725 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2726 deactivate_process (proc
);
2728 error ("Error writing to process %s; closed it", procname
);
2730 error ("SIGPIPE raised on process %s; closed it", procname
);
2735 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
2737 "Send current contents of region as input to PROCESS.\n\
2738 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2739 nil, indicating the current buffer's process.\n\
2740 Called from program, takes three arguments, PROCESS, START and END.\n\
2741 If the region is more than 500 characters long,\n\
2742 it is sent in several bunches. This may happen even for shorter regions.\n\
2743 Output from processes can arrive in between bunches.")
2744 (process
, start
, end
)
2745 Lisp_Object process
, start
, end
;
2750 proc
= get_process (process
);
2751 validate_region (&start
, &end
);
2753 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
2756 start1
= XINT (start
);
2757 send_process (proc
, &FETCH_CHAR (start1
), XINT (end
) - XINT (start
),
2758 Fcurrent_buffer ());
2763 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
2765 "Send PROCESS the contents of STRING as input.\n\
2766 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2767 nil, indicating the current buffer's process.\n\
2768 If STRING is more than 500 characters long,\n\
2769 it is sent in several bunches. This may happen even for shorter strings.\n\
2770 Output from processes can arrive in between bunches.")
2772 Lisp_Object process
, string
;
2775 CHECK_STRING (string
, 1);
2776 proc
= get_process (process
);
2777 send_process (proc
, XSTRING (string
)->data
, XSTRING (string
)->size
, string
);
2781 /* send a signal number SIGNO to PROCESS.
2782 CURRENT_GROUP means send to the process group that currently owns
2783 the terminal being used to communicate with PROCESS.
2784 This is used for various commands in shell mode.
2785 If NOMSG is zero, insert signal-announcements into process's buffers
2788 If we can, we try to signal PROCESS by sending control characters
2789 down the pty. This allows us to signal inferiors who have changed
2790 their uid, for which killpg would return an EPERM error. */
2793 process_send_signal (process
, signo
, current_group
, nomsg
)
2794 Lisp_Object process
;
2796 Lisp_Object current_group
;
2800 register struct Lisp_Process
*p
;
2804 proc
= get_process (process
);
2805 p
= XPROCESS (proc
);
2807 if (!EQ (p
->childp
, Qt
))
2808 error ("Process %s is not a subprocess",
2809 XSTRING (p
->name
)->data
);
2810 if (XINT (p
->infd
) < 0)
2811 error ("Process %s is not active",
2812 XSTRING (p
->name
)->data
);
2814 if (NILP (p
->pty_flag
))
2815 current_group
= Qnil
;
2817 /* If we are using pgrps, get a pgrp number and make it negative. */
2818 if (!NILP (current_group
))
2820 #ifdef SIGNALS_VIA_CHARACTERS
2821 /* If possible, send signals to the entire pgrp
2822 by sending an input character to it. */
2824 /* TERMIOS is the latest and bestest, and seems most likely to
2825 work. If the system has it, use it. */
2832 tcgetattr (XINT (p
->infd
), &t
);
2833 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2837 tcgetattr (XINT (p
->infd
), &t
);
2838 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2842 tcgetattr (XINT (p
->infd
), &t
);
2843 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
2844 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2846 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
2851 #else /* ! HAVE_TERMIOS */
2853 /* On Berkeley descendants, the following IOCTL's retrieve the
2854 current control characters. */
2855 #if defined (TIOCGLTC) && defined (TIOCGETC)
2863 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2864 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
2867 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2868 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
2872 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
2873 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
2875 #endif /* ! defined (SIGTSTP) */
2878 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2880 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
2887 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2888 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2891 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2892 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2896 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2897 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2899 #endif /* ! defined (SIGTSTP) */
2901 #else /* ! defined (TCGETA) */
2902 Your configuration files are messed up
.
2903 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
2904 you'd better be using one of the alternatives above! */
2905 #endif /* ! defined (TCGETA) */
2906 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2907 #endif /* ! defined HAVE_TERMIOS */
2908 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
2911 /* Get the pgrp using the tty itself, if we have that.
2912 Otherwise, use the pty to get the pgrp.
2913 On pfa systems, saka@pfu.fujitsu.co.JP writes:
2914 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
2915 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
2916 His patch indicates that if TIOCGPGRP returns an error, then
2917 we should just assume that p->pid is also the process group id. */
2921 if (!NILP (p
->subtty
))
2922 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
2924 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
2928 gid
= - XFASTINT (p
->pid
);
2929 #endif /* ! defined (pfa) */
2935 #else /* ! defined (TIOCGPGRP ) */
2936 /* Can't select pgrps on this system, so we know that
2937 the child itself heads the pgrp. */
2938 gid
= - XFASTINT (p
->pid
);
2939 #endif /* ! defined (TIOCGPGRP ) */
2942 gid
= - XFASTINT (p
->pid
);
2948 p
->raw_status_low
= Qnil
;
2949 p
->raw_status_high
= Qnil
;
2951 XSETINT (p
->tick
, ++process_tick
);
2955 #endif /* ! defined (SIGCONT) */
2958 send_process (proc
, "\003", 1, Qnil
); /* ^C */
2963 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
2968 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
2971 flush_pending_output (XINT (p
->infd
));
2975 /* If we don't have process groups, send the signal to the immediate
2976 subprocess. That isn't really right, but it's better than any
2977 obvious alternative. */
2980 kill (XFASTINT (p
->pid
), signo
);
2984 /* gid may be a pid, or minus a pgrp's number */
2986 if (!NILP (current_group
))
2987 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
2990 gid
= - XFASTINT (p
->pid
);
2993 #else /* ! defined (TIOCSIGSEND) */
2994 EMACS_KILLPG (-gid
, signo
);
2995 #endif /* ! defined (TIOCSIGSEND) */
2998 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
2999 "Interrupt process PROCESS. May be process or name of one.\n\
3000 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
3001 nil or no arg means current buffer's process.\n\
3002 Second arg CURRENT-GROUP non-nil means send signal to\n\
3003 the current process-group of the process's controlling terminal\n\
3004 rather than to the process's own process group.\n\
3005 If the process is a shell, this means interrupt current subjob\n\
3006 rather than the shell.")
3007 (process
, current_group
)
3008 Lisp_Object process
, current_group
;
3010 process_send_signal (process
, SIGINT
, current_group
, 0);
3014 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
3015 "Kill process PROCESS. May be process or name of one.\n\
3016 See function `interrupt-process' for more details on usage.")
3017 (process
, current_group
)
3018 Lisp_Object process
, current_group
;
3020 process_send_signal (process
, SIGKILL
, current_group
, 0);
3024 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
3025 "Send QUIT signal to process PROCESS. May be process or name of one.\n\
3026 See function `interrupt-process' for more details on usage.")
3027 (process
, current_group
)
3028 Lisp_Object process
, current_group
;
3030 process_send_signal (process
, SIGQUIT
, current_group
, 0);
3034 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
3035 "Stop process PROCESS. May be process or name of one.\n\
3036 See function `interrupt-process' for more details on usage.")
3037 (process
, current_group
)
3038 Lisp_Object process
, current_group
;
3041 error ("no SIGTSTP support");
3043 process_send_signal (process
, SIGTSTP
, current_group
, 0);
3048 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
3049 "Continue process PROCESS. May be process or name of one.\n\
3050 See function `interrupt-process' for more details on usage.")
3051 (process
, current_group
)
3052 Lisp_Object process
, current_group
;
3055 process_send_signal (process
, SIGCONT
, current_group
, 0);
3057 error ("no SIGCONT support");
3062 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
3063 2, 2, "nProcess number: \nnSignal code: ",
3064 "Send the process with process id PID the signal with code SIGCODE.\n\
3065 PID must be an integer. The process need not be a child of this Emacs.\n\
3066 SIGCODE may be an integer, or a symbol whose name is a signal name.")
3068 Lisp_Object pid
, sigcode
;
3070 CHECK_NUMBER (pid
, 0);
3072 #define handle_signal(NAME, VALUE) \
3073 else if (!strcmp (name, NAME)) \
3074 XSETINT (sigcode, VALUE)
3076 if (INTEGERP (sigcode
))
3080 unsigned char *name
;
3082 CHECK_SYMBOL (sigcode
, 1);
3083 name
= XSYMBOL (sigcode
)->name
->data
;
3088 handle_signal ("SIGHUP", SIGHUP
);
3091 handle_signal ("SIGINT", SIGINT
);
3094 handle_signal ("SIGQUIT", SIGQUIT
);
3097 handle_signal ("SIGILL", SIGILL
);
3100 handle_signal ("SIGABRT", SIGABRT
);
3103 handle_signal ("SIGEMT", SIGEMT
);
3106 handle_signal ("SIGKILL", SIGKILL
);
3109 handle_signal ("SIGFPE", SIGFPE
);
3112 handle_signal ("SIGBUS", SIGBUS
);
3115 handle_signal ("SIGSEGV", SIGSEGV
);
3118 handle_signal ("SIGSYS", SIGSYS
);
3121 handle_signal ("SIGPIPE", SIGPIPE
);
3124 handle_signal ("SIGALRM", SIGALRM
);
3127 handle_signal ("SIGTERM", SIGTERM
);
3130 handle_signal ("SIGURG", SIGURG
);
3133 handle_signal ("SIGSTOP", SIGSTOP
);
3136 handle_signal ("SIGTSTP", SIGTSTP
);
3139 handle_signal ("SIGCONT", SIGCONT
);
3142 handle_signal ("SIGCHLD", SIGCHLD
);
3145 handle_signal ("SIGTTIN", SIGTTIN
);
3148 handle_signal ("SIGTTOU", SIGTTOU
);
3151 handle_signal ("SIGIO", SIGIO
);
3154 handle_signal ("SIGXCPU", SIGXCPU
);
3157 handle_signal ("SIGXFSZ", SIGXFSZ
);
3160 handle_signal ("SIGVTALRM", SIGVTALRM
);
3163 handle_signal ("SIGPROF", SIGPROF
);
3166 handle_signal ("SIGWINCH", SIGWINCH
);
3169 handle_signal ("SIGINFO", SIGINFO
);
3172 handle_signal ("SIGUSR1", SIGUSR1
);
3175 handle_signal ("SIGUSR2", SIGUSR2
);
3178 error ("Undefined signal name %s", name
);
3181 #undef handle_signal
3184 /* Only works for kill-type signals */
3185 return make_number (win32_kill_process (XINT (pid
), XINT (sigcode
)));
3187 return make_number (kill (XINT (pid
), XINT (sigcode
)));
3191 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
3192 "Make PROCESS see end-of-file in its input.\n\
3193 Eof comes after any text already sent to it.\n\
3194 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3195 nil, indicating the current buffer's process.\n\
3196 If PROCESS is a network connection, or is a process communicating\n\
3197 through a pipe (as opposed to a pty), then you cannot send any more\n\
3198 text to PROCESS after you call this function.")
3200 Lisp_Object process
;
3204 proc
= get_process (process
);
3206 /* Make sure the process is really alive. */
3207 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3208 update_status (XPROCESS (proc
));
3209 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3210 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
3213 send_process (proc
, "\032", 1, Qnil
); /* ^z */
3215 if (!NILP (XPROCESS (proc
)->pty_flag
))
3216 send_process (proc
, "\004", 1, Qnil
);
3219 close (XINT (XPROCESS (proc
)->outfd
));
3220 XSETINT (XPROCESS (proc
)->outfd
, open (NULL_DEVICE
, O_WRONLY
));
3226 /* Kill all processes associated with `buffer'.
3227 If `buffer' is nil, kill all processes */
3229 kill_buffer_processes (buffer
)
3232 Lisp_Object tail
, proc
;
3234 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3236 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3237 if (GC_PROCESSP (proc
)
3238 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
3240 if (NETCONN_P (proc
))
3241 Fdelete_process (proc
);
3242 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
3243 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
3248 /* On receipt of a signal that a child status has changed,
3249 loop asking about children with changed statuses until
3250 the system says there are no more.
3251 All we do is change the status;
3252 we do not run sentinels or print notifications.
3253 That is saved for the next time keyboard input is done,
3254 in order to avoid timing errors. */
3256 /** WARNING: this can be called during garbage collection.
3257 Therefore, it must not be fooled by the presence of mark bits in
3260 /** USG WARNING: Although it is not obvious from the documentation
3261 in signal(2), on a USG system the SIGCLD handler MUST NOT call
3262 signal() before executing at least one wait(), otherwise the handler
3263 will be called again, resulting in an infinite loop. The relevant
3264 portion of the documentation reads "SIGCLD signals will be queued
3265 and the signal-catching function will be continually reentered until
3266 the queue is empty". Invoking signal() causes the kernel to reexamine
3267 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
3270 sigchld_handler (signo
)
3273 int old_errno
= errno
;
3275 register struct Lisp_Process
*p
;
3276 extern EMACS_TIME
*input_available_clear_time
;
3280 sigheld
|= sigbit (SIGCHLD
);
3292 #endif /* no WUNTRACED */
3293 /* Keep trying to get a status until we get a definitive result. */
3297 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
3299 while (pid
<= 0 && errno
== EINTR
);
3303 /* A real failure. We have done all our job, so return. */
3305 /* USG systems forget handlers when they are used;
3306 must reestablish each time */
3308 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
3311 sigheld
&= ~sigbit (SIGCHLD
);
3319 #endif /* no WNOHANG */
3321 /* Find the process that signaled us, and record its status. */
3324 for (tail
= Vprocess_alist
; XSYMBOL (tail
) != XSYMBOL (Qnil
); tail
= XCONS (tail
)->cdr
)
3326 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3327 p
= XPROCESS (proc
);
3328 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
3333 /* Look for an asynchronous process whose pid hasn't been filled
3336 for (tail
= Vprocess_alist
; XSYMBOL (tail
) != XSYMBOL (Qnil
); tail
= XCONS (tail
)->cdr
)
3338 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3339 p
= XPROCESS (proc
);
3340 if (INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
3345 /* Change the status of the process that was found. */
3348 union { int i
; WAITTYPE wt
; } u
;
3349 int clear_desc_flag
= 0;
3351 XSETINT (p
->tick
, ++process_tick
);
3353 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
3354 XSETINT (p
->raw_status_high
, u
.i
>> 16);
3356 /* If process has terminated, stop waiting for its output. */
3357 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
3358 && XINT (p
->infd
) >= 0)
3359 clear_desc_flag
= 1;
3361 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
3362 if (clear_desc_flag
)
3364 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
3365 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
3368 /* Tell wait_reading_process_input that it needs to wake up and
3370 if (input_available_clear_time
)
3371 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3374 /* There was no asynchronous process found for that id. Check
3375 if we have a synchronous process. */
3378 synch_process_alive
= 0;
3380 /* Report the status of the synchronous process. */
3382 synch_process_retcode
= WRETCODE (w
);
3383 else if (WIFSIGNALED (w
))
3385 int code
= WTERMSIG (w
);
3391 /* Suppress warning if the table has const char *. */
3392 signame
= (char *) sys_siglist
[code
];
3394 signame
= sys_errlist
[code
];
3398 signame
= "unknown";
3400 synch_process_death
= signame
;
3403 /* Tell wait_reading_process_input that it needs to wake up and
3405 if (input_available_clear_time
)
3406 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3409 /* On some systems, we must return right away.
3410 If any more processes want to signal us, we will
3412 Otherwise (on systems that have WNOHANG), loop around
3413 to use up all the processes that have something to tell us. */
3414 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT)
3416 signal (signo
, sigchld_handler
);
3420 #endif /* USG, but not HPUX with WNOHANG */
3426 exec_sentinel_unwind (data
)
3429 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
3434 exec_sentinel_error_handler (error
)
3437 cmd_error_internal (error
, "error in process sentinel: ");
3439 update_echo_area ();
3440 Fsleep_for (make_number (2), Qnil
);
3444 exec_sentinel (proc
, reason
)
3445 Lisp_Object proc
, reason
;
3447 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
3448 register struct Lisp_Process
*p
= XPROCESS (proc
);
3449 int count
= specpdl_ptr
- specpdl
;
3451 /* No need to gcpro these, because all we do with them later
3452 is test them for EQness, and none of them should be a string. */
3453 odeactivate
= Vdeactivate_mark
;
3454 XSETBUFFER (obuffer
, current_buffer
);
3455 okeymap
= current_buffer
->keymap
;
3457 sentinel
= p
->sentinel
;
3458 if (NILP (sentinel
))
3461 /* Zilch the sentinel while it's running, to avoid recursive invocations;
3462 assure that it gets restored no matter how the sentinel exits. */
3464 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
3465 /* Inhibit quit so that random quits don't screw up a running filter. */
3466 specbind (Qinhibit_quit
, Qt
);
3467 specbind (Qlast_nonmenu_event
, Qt
);
3469 running_asynch_code
= 1;
3470 internal_condition_case_1 (read_process_output_call
,
3472 Fcons (proc
, Fcons (reason
, Qnil
))),
3473 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
3474 exec_sentinel_error_handler
);
3475 running_asynch_code
= 0;
3476 restore_match_data ();
3478 Vdeactivate_mark
= odeactivate
;
3480 if (! EQ (Fcurrent_buffer (), obuffer
)
3481 || ! EQ (current_buffer
->keymap
, okeymap
))
3483 /* But do it only if the caller is actually going to read events.
3484 Otherwise there's no need to make him wake up, and it could
3485 cause trouble (for example it would make Fsit_for return). */
3486 if (waiting_for_user_input_p
== -1)
3487 record_asynch_buffer_change ();
3489 unbind_to (count
, Qnil
);
3492 /* Report all recent events of a change in process status
3493 (either run the sentinel or output a message).
3494 This is done while Emacs is waiting for keyboard input. */
3498 register Lisp_Object proc
, buffer
;
3499 Lisp_Object tail
, msg
;
3500 struct gcpro gcpro1
, gcpro2
;
3504 /* We need to gcpro tail; if read_process_output calls a filter
3505 which deletes a process and removes the cons to which tail points
3506 from Vprocess_alist, and then causes a GC, tail is an unprotected
3510 /* Set this now, so that if new processes are created by sentinels
3511 that we run, we get called again to handle their status changes. */
3512 update_tick
= process_tick
;
3514 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
3517 register struct Lisp_Process
*p
;
3519 proc
= Fcdr (Fcar (tail
));
3520 p
= XPROCESS (proc
);
3522 if (XINT (p
->tick
) != XINT (p
->update_tick
))
3524 XSETINT (p
->update_tick
, XINT (p
->tick
));
3526 /* If process is still active, read any output that remains. */
3527 if (XINT (p
->infd
) >= 0)
3528 while (! EQ (p
->filter
, Qt
)
3529 && read_process_output (proc
, XINT (p
->infd
)) > 0);
3533 /* Get the text to use for the message. */
3534 if (!NILP (p
->raw_status_low
))
3536 msg
= status_message (p
->status
);
3538 /* If process is terminated, deactivate it or delete it. */
3540 if (CONSP (p
->status
))
3541 symbol
= XCONS (p
->status
)->car
;
3543 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
3544 || EQ (symbol
, Qclosed
))
3546 if (delete_exited_processes
)
3547 remove_process (proc
);
3549 deactivate_process (proc
);
3552 /* Now output the message suitably. */
3553 if (!NILP (p
->sentinel
))
3554 exec_sentinel (proc
, msg
);
3555 /* Don't bother with a message in the buffer
3556 when a process becomes runnable. */
3557 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
3559 Lisp_Object ro
, tem
;
3560 struct buffer
*old
= current_buffer
;
3563 ro
= XBUFFER (buffer
)->read_only
;
3565 /* Avoid error if buffer is deleted
3566 (probably that's why the process is dead, too) */
3567 if (NILP (XBUFFER (buffer
)->name
))
3569 Fset_buffer (buffer
);
3571 /* Insert new output into buffer
3572 at the current end-of-output marker,
3573 thus preserving logical ordering of input and output. */
3574 if (XMARKER (p
->mark
)->buffer
)
3575 SET_PT (marker_position (p
->mark
));
3578 if (point
<= opoint
)
3579 opoint
+= XSTRING (msg
)->size
+ XSTRING (p
->name
)->size
+ 10;
3581 tem
= current_buffer
->read_only
;
3582 current_buffer
->read_only
= Qnil
;
3583 insert_string ("\nProcess ");
3584 Finsert (1, &p
->name
);
3585 insert_string (" ");
3587 current_buffer
->read_only
= tem
;
3588 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
3591 set_buffer_internal (old
);
3596 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
3597 redisplay_preserve_echo_area ();
3602 /* The first time this is called, assume keyboard input comes from DESC
3603 instead of from where we used to expect it.
3604 Subsequent calls mean assume input keyboard can come from DESC
3605 in addition to other places. */
3607 static int add_keyboard_wait_descriptor_called_flag
;
3610 add_keyboard_wait_descriptor (desc
)
3613 if (! add_keyboard_wait_descriptor_called_flag
)
3614 FD_CLR (0, &input_wait_mask
);
3615 add_keyboard_wait_descriptor_called_flag
= 1;
3616 FD_SET (desc
, &input_wait_mask
);
3617 if (desc
> max_keyboard_desc
)
3618 max_keyboard_desc
= desc
;
3621 /* From now on, do not expect DESC to give keyboard input. */
3624 delete_keyboard_wait_descriptor (desc
)
3628 int lim
= max_keyboard_desc
;
3630 FD_CLR (desc
, &input_wait_mask
);
3632 if (desc
== max_keyboard_desc
)
3633 for (fd
= 0; fd
< lim
; fd
++)
3634 if (FD_ISSET (fd
, &input_wait_mask
)
3635 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3636 max_keyboard_desc
= fd
;
3639 /* Return nonzero if *MASK has a bit set
3640 that corresponds to one of the keyboard input descriptors. */
3643 keyboard_bit_set (mask
)
3648 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
3649 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
3650 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3662 if (! noninteractive
|| initialized
)
3664 signal (SIGCHLD
, sigchld_handler
);
3667 FD_ZERO (&input_wait_mask
);
3668 FD_ZERO (&non_keyboard_wait_mask
);
3669 max_process_desc
= 0;
3671 FD_SET (0, &input_wait_mask
);
3673 Vprocess_alist
= Qnil
;
3674 for (i
= 0; i
< MAXDESC
; i
++)
3676 chan_process
[i
] = Qnil
;
3677 proc_buffered_char
[i
] = -1;
3684 stream_process
= intern ("stream");
3686 Qprocessp
= intern ("processp");
3687 staticpro (&Qprocessp
);
3688 Qrun
= intern ("run");
3690 Qstop
= intern ("stop");
3692 Qsignal
= intern ("signal");
3693 staticpro (&Qsignal
);
3695 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
3698 Qexit = intern ("exit");
3699 staticpro (&Qexit); */
3701 Qopen
= intern ("open");
3703 Qclosed
= intern ("closed");
3704 staticpro (&Qclosed
);
3706 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
3707 staticpro (&Qlast_nonmenu_event
);
3709 staticpro (&Vprocess_alist
);
3711 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
3712 "*Non-nil means delete processes immediately when they exit.\n\
3713 nil means don't delete them until `list-processes' is run.");
3715 delete_exited_processes
= 1;
3717 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
3718 "Control type of device used to communicate with subprocesses.\n\
3719 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
3720 The value has no effect if the system has no ptys or if all ptys are busy:\n\
3721 then a pipe is used in any case.\n\
3722 The value takes effect when `start-process' is called.");
3723 Vprocess_connection_type
= Qt
;
3725 defsubr (&Sprocessp
);
3726 defsubr (&Sget_process
);
3727 defsubr (&Sget_buffer_process
);
3728 defsubr (&Sdelete_process
);
3729 defsubr (&Sprocess_status
);
3730 defsubr (&Sprocess_exit_status
);
3731 defsubr (&Sprocess_id
);
3732 defsubr (&Sprocess_name
);
3733 defsubr (&Sprocess_tty_name
);
3734 defsubr (&Sprocess_command
);
3735 defsubr (&Sset_process_buffer
);
3736 defsubr (&Sprocess_buffer
);
3737 defsubr (&Sprocess_mark
);
3738 defsubr (&Sset_process_filter
);
3739 defsubr (&Sprocess_filter
);
3740 defsubr (&Sset_process_sentinel
);
3741 defsubr (&Sset_process_window_size
);
3742 defsubr (&Sprocess_sentinel
);
3743 defsubr (&Sprocess_kill_without_query
);
3744 defsubr (&Slist_processes
);
3745 defsubr (&Sprocess_list
);
3746 defsubr (&Sstart_process
);
3748 defsubr (&Sopen_network_stream
);
3749 #endif /* HAVE_SOCKETS */
3750 defsubr (&Saccept_process_output
);
3751 defsubr (&Sprocess_send_region
);
3752 defsubr (&Sprocess_send_string
);
3753 defsubr (&Sinterrupt_process
);
3754 defsubr (&Skill_process
);
3755 defsubr (&Squit_process
);
3756 defsubr (&Sstop_process
);
3757 defsubr (&Scontinue_process
);
3758 defsubr (&Sprocess_send_eof
);
3759 defsubr (&Ssignal_process
);
3760 defsubr (&Swaiting_for_user_input_p
);
3761 /* defsubr (&Sprocess_connection); */
3765 #else /* not subprocesses */
3767 #include <sys/types.h>
3771 #include "systime.h"
3772 #include "termopts.h"
3773 #include "sysselect.h"
3775 extern int frame_garbaged
;
3778 /* As described above, except assuming that there are no subprocesses:
3780 Wait for timeout to elapse and/or keyboard input to be available.
3783 timeout in seconds, or
3784 zero for no limit, or
3785 -1 means gobble data immediately available but don't wait for any.
3787 read_kbd is a Lisp_Object:
3788 0 to ignore keyboard input, or
3789 1 to return when input is available, or
3790 -1 means caller will actually read the input, so don't throw to
3792 We know that read_kbd will never be a Lisp_Process, since
3793 `subprocesses' isn't defined.
3795 do_display != 0 means redisplay should be done to show subprocess
3796 output that arrives.
3798 Return true iff we received input from any process. */
3801 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
3802 int time_limit
, microsecs
;
3803 Lisp_Object read_kbd
;
3806 EMACS_TIME end_time
, timeout
, *timeout_p
;
3807 SELECT_TYPE waitchannels
;
3809 /* What does time_limit really mean? */
3810 if (time_limit
|| microsecs
)
3812 /* It's not infinite. */
3813 timeout_p
= &timeout
;
3815 if (time_limit
== -1)
3816 /* In fact, it's zero. */
3817 EMACS_SET_SECS_USECS (timeout
, 0, 0);
3819 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
3821 /* How far in the future is that? */
3822 EMACS_GET_TIME (end_time
);
3823 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
3826 /* It's infinite. */
3829 /* Turn off periodic alarms (in case they are in use)
3830 because the select emulator uses alarms. */
3837 if (XINT (read_kbd
))
3838 FD_SET (0, &waitchannels
);
3840 FD_ZERO (&waitchannels
);
3842 /* If calling from keyboard input, do not quit
3843 since we want to return C-g as an input character.
3844 Otherwise, do pending quit if requested. */
3845 if (XINT (read_kbd
) >= 0)
3850 EMACS_GET_TIME (*timeout_p
);
3851 EMACS_SUB_TIME (*timeout_p
, end_time
, *timeout_p
);
3852 if (EMACS_TIME_NEG_P (*timeout_p
))
3856 /* Cause C-g and alarm signals to take immediate action,
3857 and cause input available signals to zero out timeout. */
3858 if (XINT (read_kbd
) < 0)
3859 set_waiting_for_input (&timeout
);
3861 /* If a frame has been newly mapped and needs updating,
3862 reprocess its display stuff. */
3863 if (frame_garbaged
&& do_display
)
3864 redisplay_preserve_echo_area ();
3866 if (XINT (read_kbd
) && detect_input_pending ())
3869 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
3872 /* Make C-g and alarm signals set flags again */
3873 clear_waiting_for_input ();
3875 /* If we woke up due to SIGWINCH, actually change size now. */
3876 do_pending_window_change ();
3880 /* If the system call was interrupted, then go around the
3883 FD_ZERO (&waitchannels
);
3886 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
3887 /* System sometimes fails to deliver SIGIO. */
3888 kill (getpid (), SIGIO
);
3891 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
3895 /* If we have timed out (nfds == 0) or found some input (nfds > 0),
3907 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
3908 /* Don't confuse make-docfile by having two doc strings for this function.
3909 make-docfile does not pay attention to #if, for good reason! */
3912 register Lisp_Object name
;
3917 /* Kill all processes associated with `buffer'.
3918 If `buffer' is nil, kill all processes.
3919 Since we have no subprocesses, this does nothing. */
3921 kill_buffer_processes (buffer
)
3932 defsubr (&Sget_buffer_process
);
3936 #endif /* not subprocesses */