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
);
510 deactivate_process (proc
);
513 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
514 "Return t if OBJECT is a process.")
518 return PROCESSP (object
) ? Qt
: Qnil
;
521 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
522 "Return the process named NAME, or nil if there is none.")
524 register Lisp_Object name
;
528 CHECK_STRING (name
, 0);
529 return Fcdr (Fassoc (name
, Vprocess_alist
));
532 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
533 "Return the (or, a) process associated with BUFFER.\n\
534 BUFFER may be a buffer or the name of one.")
536 register Lisp_Object buffer
;
538 register Lisp_Object buf
, tail
, proc
;
540 if (NILP (buffer
)) return Qnil
;
541 buf
= Fget_buffer (buffer
);
542 if (NILP (buf
)) return Qnil
;
544 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
546 proc
= Fcdr (Fcar (tail
));
547 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
553 /* This is how commands for the user decode process arguments. It
554 accepts a process, a process name, a buffer, a buffer name, or nil.
555 Buffers denote the first process in the buffer, and nil denotes the
560 register Lisp_Object name
;
562 register Lisp_Object proc
, obj
;
565 obj
= Fget_process (name
);
567 obj
= Fget_buffer (name
);
569 error ("Process %s does not exist", XSTRING (name
)->data
);
571 else if (NILP (name
))
572 obj
= Fcurrent_buffer ();
576 /* Now obj should be either a buffer object or a process object.
580 proc
= Fget_buffer_process (obj
);
582 error ("Buffer %s has no process", XSTRING (XBUFFER (obj
)->name
)->data
);
586 CHECK_PROCESS (obj
, 0);
592 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
593 "Delete PROCESS: kill it and forget about it immediately.\n\
594 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
595 nil, indicating the current buffer's process.")
597 register Lisp_Object process
;
599 process
= get_process (process
);
600 XPROCESS (process
)->raw_status_low
= Qnil
;
601 XPROCESS (process
)->raw_status_high
= Qnil
;
602 if (NETCONN_P (process
))
604 XPROCESS (process
)->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
605 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
607 else if (XINT (XPROCESS (process
)->infd
) >= 0)
609 Fkill_process (process
, Qnil
);
610 /* Do this now, since remove_process will make sigchld_handler do nothing. */
611 XPROCESS (process
)->status
612 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
613 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
616 remove_process (process
);
620 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
621 "Return the status of PROCESS: a symbol, one of these:\n\
622 run -- for a process that is running.\n\
623 stop -- for a process stopped but continuable.\n\
624 exit -- for a process that has exited.\n\
625 signal -- for a process that has got a fatal signal.\n\
626 open -- for a network stream connection that is open.\n\
627 closed -- for a network stream connection that is closed.\n\
628 nil -- if arg is a process name and no such process exists.\n\
629 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
630 nil, indicating the current buffer's process.")
632 register Lisp_Object process
;
634 register struct Lisp_Process
*p
;
635 register Lisp_Object status
;
637 if (STRINGP (process
))
638 process
= Fget_process (process
);
640 process
= get_process (process
);
645 p
= XPROCESS (process
);
646 if (!NILP (p
->raw_status_low
))
650 status
= XCONS (status
)->car
;
651 if (NETCONN_P (process
))
653 if (EQ (status
, Qrun
))
655 else if (EQ (status
, Qexit
))
661 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
663 "Return the exit status of PROCESS or the signal number that killed it.\n\
664 If PROCESS has not yet exited or died, return 0.")
666 register Lisp_Object process
;
668 CHECK_PROCESS (process
, 0);
669 if (!NILP (XPROCESS (process
)->raw_status_low
))
670 update_status (XPROCESS (process
));
671 if (CONSP (XPROCESS (process
)->status
))
672 return XCONS (XCONS (XPROCESS (process
)->status
)->cdr
)->car
;
673 return make_number (0);
676 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
677 "Return the process id of PROCESS.\n\
678 This is the pid of the Unix process which PROCESS uses or talks to.\n\
679 For a network connection, this value is nil.")
681 register Lisp_Object process
;
683 CHECK_PROCESS (process
, 0);
684 return XPROCESS (process
)->pid
;
687 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
688 "Return the name of PROCESS, as a string.\n\
689 This is the name of the program invoked in PROCESS,\n\
690 possibly modified to make it unique among process names.")
692 register Lisp_Object process
;
694 CHECK_PROCESS (process
, 0);
695 return XPROCESS (process
)->name
;
698 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
699 "Return the command that was executed to start PROCESS.\n\
700 This is a list of strings, the first string being the program executed\n\
701 and the rest of the strings being the arguments given to it.\n\
702 For a non-child channel, this is nil.")
704 register Lisp_Object process
;
706 CHECK_PROCESS (process
, 0);
707 return XPROCESS (process
)->command
;
710 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
711 "Return the name of the terminal PROCESS uses, or nil if none.\n\
712 This is the terminal that the process itself reads and writes on,\n\
713 not the name of the pty that Emacs uses to talk with that terminal.")
715 register Lisp_Object process
;
717 CHECK_PROCESS (process
, 0);
718 return XPROCESS (process
)->tty_name
;
721 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
723 "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).")
725 register Lisp_Object process
, buffer
;
727 CHECK_PROCESS (process
, 0);
729 CHECK_BUFFER (buffer
, 1);
730 XPROCESS (process
)->buffer
= buffer
;
734 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
736 "Return the buffer PROCESS is associated with.\n\
737 Output from PROCESS is inserted in this buffer\n\
738 unless PROCESS has a filter.")
740 register Lisp_Object process
;
742 CHECK_PROCESS (process
, 0);
743 return XPROCESS (process
)->buffer
;
746 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
748 "Return the marker for the end of the last output from PROCESS.")
750 register Lisp_Object process
;
752 CHECK_PROCESS (process
, 0);
753 return XPROCESS (process
)->mark
;
756 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
758 "Give PROCESS the filter function FILTER; nil means no filter.\n\
759 t means stop accepting output from the process.\n\
760 When a process has a filter, each time it does output\n\
761 the entire string of output is passed to the filter.\n\
762 The filter gets two arguments: the process and the string of output.\n\
763 If the process has a filter, its buffer is not used for output.")
765 register Lisp_Object process
, filter
;
767 CHECK_PROCESS (process
, 0);
770 FD_CLR (XINT (XPROCESS (process
)->infd
), &input_wait_mask
);
771 FD_CLR (XINT (XPROCESS (process
)->infd
), &non_keyboard_wait_mask
);
773 else if (EQ (XPROCESS (process
)->filter
, Qt
))
775 FD_SET (XINT (XPROCESS (process
)->infd
), &input_wait_mask
);
776 FD_SET (XINT (XPROCESS (process
)->infd
), &non_keyboard_wait_mask
);
778 XPROCESS (process
)->filter
= filter
;
782 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
784 "Returns the filter function of PROCESS; nil if none.\n\
785 See `set-process-filter' for more info on filter functions.")
787 register Lisp_Object process
;
789 CHECK_PROCESS (process
, 0);
790 return XPROCESS (process
)->filter
;
793 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
795 "Give PROCESS the sentinel SENTINEL; nil for none.\n\
796 The sentinel is called as a function when the process changes state.\n\
797 It gets two arguments: the process, and a string describing the change.")
799 register Lisp_Object process
, sentinel
;
801 CHECK_PROCESS (process
, 0);
802 XPROCESS (process
)->sentinel
= sentinel
;
806 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
808 "Return the sentinel of PROCESS; nil if none.\n\
809 See `set-process-sentinel' for more info on sentinels.")
811 register Lisp_Object process
;
813 CHECK_PROCESS (process
, 0);
814 return XPROCESS (process
)->sentinel
;
817 DEFUN ("set-process-window-size", Fset_process_window_size
,
818 Sset_process_window_size
, 3, 3, 0,
819 "Tell PROCESS that it has logical window size HEIGHT and WIDTH.")
820 (process
, height
, width
)
821 register Lisp_Object process
, height
, width
;
823 CHECK_PROCESS (process
, 0);
824 CHECK_NATNUM (height
, 0);
825 CHECK_NATNUM (width
, 0);
826 if (set_window_size (XINT (XPROCESS (process
)->infd
),
827 XINT (height
), XINT(width
)) <= 0)
833 DEFUN ("process-kill-without-query", Fprocess_kill_without_query
,
834 Sprocess_kill_without_query
, 1, 2, 0,
835 "Say no query needed if PROCESS is running when Emacs is exited.\n\
836 Optional second argument if non-nil says to require a query.\n\
837 Value is t if a query was formerly required.")
839 register Lisp_Object process
, value
;
843 CHECK_PROCESS (process
, 0);
844 tem
= XPROCESS (process
)->kill_without_query
;
845 XPROCESS (process
)->kill_without_query
= Fnull (value
);
850 #if 0 /* Turned off because we don't currently record this info
851 in the process. Perhaps add it. */
852 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
853 "Return the connection type of `PROCESS'.\n\
854 The value is `nil' for a pipe,\n\
855 `t' or `pty' for a pty, or `stream' for a socket connection.")
859 return XPROCESS (process
)->type
;
866 register Lisp_Object tail
, tem
;
867 Lisp_Object proc
, minspace
, tem1
;
868 register struct buffer
*old
= current_buffer
;
869 register struct Lisp_Process
*p
;
873 XSETFASTINT (minspace
, 1);
875 set_buffer_internal (XBUFFER (Vstandard_output
));
876 Fbuffer_disable_undo (Vstandard_output
);
878 current_buffer
->truncate_lines
= Qt
;
881 Proc Status Buffer Tty Command\n\
882 ---- ------ ------ --- -------\n", -1);
884 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
888 proc
= Fcdr (Fcar (tail
));
890 if (NILP (p
->childp
))
893 Finsert (1, &p
->name
);
894 Findent_to (make_number (13), minspace
);
896 if (!NILP (p
->raw_status_low
))
899 if (CONSP (p
->status
))
900 symbol
= XCONS (p
->status
)->car
;
903 if (EQ (symbol
, Qsignal
))
906 tem
= Fcar (Fcdr (p
->status
));
908 if (XINT (tem
) < NSIG
)
909 write_string (sys_errlist
[XINT (tem
)], -1);
912 Fprinc (symbol
, Qnil
);
914 else if (NETCONN_P (proc
))
916 if (EQ (symbol
, Qrun
))
917 write_string ("open", -1);
918 else if (EQ (symbol
, Qexit
))
919 write_string ("closed", -1);
921 Fprinc (symbol
, Qnil
);
924 Fprinc (symbol
, Qnil
);
926 if (EQ (symbol
, Qexit
))
929 tem
= Fcar (Fcdr (p
->status
));
932 sprintf (tembuf
, " %d", (int) XFASTINT (tem
));
933 write_string (tembuf
, -1);
937 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
938 remove_process (proc
);
940 Findent_to (make_number (22), minspace
);
941 if (NILP (p
->buffer
))
942 insert_string ("(none)");
943 else if (NILP (XBUFFER (p
->buffer
)->name
))
944 insert_string ("(Killed)");
946 Finsert (1, &XBUFFER (p
->buffer
)->name
);
948 Findent_to (make_number (37), minspace
);
950 if (STRINGP (p
->tty_name
))
951 Finsert (1, &p
->tty_name
);
953 insert_string ("(none)");
955 Findent_to (make_number (49), minspace
);
957 if (NETCONN_P (proc
))
959 sprintf (tembuf
, "(network stream connection to %s)\n",
960 XSTRING (p
->childp
)->data
);
961 insert_string (tembuf
);
975 insert_string ("\n");
981 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 0, "",
982 "Display a list of all processes.\n\
983 \(Any processes listed as Exited or Signaled are actually eliminated\n\
984 after the listing is made.)")
987 internal_with_output_to_temp_buffer ("*Process List*",
988 list_processes_1
, Qnil
);
992 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
993 "Return a list of all processes.")
996 return Fmapcar (Qcdr
, Vprocess_alist
);
999 /* Starting asynchronous inferior processes. */
1001 static Lisp_Object
start_process_unwind ();
1003 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1004 "Start a program in a subprocess. Return the process object for it.\n\
1005 Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\
1006 NAME is name for process. It is modified if necessary to make it unique.\n\
1007 BUFFER is the buffer or (buffer-name) to associate with the process.\n\
1008 Process output goes at end of that buffer, unless you specify\n\
1009 an output stream or filter function to handle the output.\n\
1010 BUFFER may be also nil, meaning that this process is not associated\n\
1012 Third arg is program file name. It is searched for as in the shell.\n\
1013 Remaining arguments are strings to give program as arguments.")
1016 register Lisp_Object
*args
;
1018 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1020 register unsigned char *new_argv
;
1023 register unsigned char **new_argv
;
1026 int count
= specpdl_ptr
- specpdl
;
1030 buffer
= Fget_buffer_create (buffer
);
1032 /* Make sure that the child will be able to chdir to the current
1033 buffer's current directory, or its unhandled equivalent. We
1034 can't just have the child check for an error when it does the
1035 chdir, since it's in a vfork.
1037 We have to GCPRO around this because Fexpand_file_name and
1038 Funhandled_file_name_directory might call a file name handling
1039 function. The argument list is protected by the caller, so all
1040 we really have to worry about is buffer. */
1042 struct gcpro gcpro1
, gcpro2
;
1044 current_dir
= current_buffer
->directory
;
1046 GCPRO2 (buffer
, current_dir
);
1049 = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir
),
1051 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1052 report_file_error ("Setting current directory",
1053 Fcons (current_buffer
->directory
, Qnil
));
1059 CHECK_STRING (name
, 0);
1063 CHECK_STRING (program
, 2);
1066 /* Make a one member argv with all args concatenated
1067 together separated by a blank. */
1068 len
= XSTRING (program
)->size
+ 2;
1069 for (i
= 3; i
< nargs
; i
++)
1072 CHECK_STRING (tem
, i
);
1073 len
+= XSTRING (tem
)->size
+ 1; /* count the blank */
1075 new_argv
= (unsigned char *) alloca (len
);
1076 strcpy (new_argv
, XSTRING (program
)->data
);
1077 for (i
= 3; i
< nargs
; i
++)
1080 CHECK_STRING (tem
, i
);
1081 strcat (new_argv
, " ");
1082 strcat (new_argv
, XSTRING (tem
)->data
);
1084 /* Need to add code here to check for program existence on VMS */
1087 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1089 /* If program file name is not absolute, search our path for it */
1090 if (!IS_DIRECTORY_SEP (XSTRING (program
)->data
[0])
1091 && !(XSTRING (program
)->size
> 1
1092 && IS_DEVICE_SEP (XSTRING (program
)->data
[1])))
1094 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1097 GCPRO4 (name
, program
, buffer
, current_dir
);
1098 openp (Vexec_path
, program
, EXEC_SUFFIXES
, &tem
, 1);
1101 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1102 tem
= Fexpand_file_name (tem
, Qnil
);
1103 new_argv
[0] = XSTRING (tem
)->data
;
1107 if (!NILP (Ffile_directory_p (program
)))
1108 error ("Specified program for new process is a directory");
1110 new_argv
[0] = XSTRING (program
)->data
;
1113 for (i
= 3; i
< nargs
; i
++)
1116 CHECK_STRING (tem
, i
);
1117 new_argv
[i
- 2] = XSTRING (tem
)->data
;
1119 new_argv
[i
- 2] = 0;
1120 #endif /* not VMS */
1122 proc
= make_process (name
);
1123 /* If an error occurs and we can't start the process, we want to
1124 remove it from the process list. This means that each error
1125 check in create_process doesn't need to call remove_process
1126 itself; it's all taken care of here. */
1127 record_unwind_protect (start_process_unwind
, proc
);
1129 XPROCESS (proc
)->childp
= Qt
;
1130 XPROCESS (proc
)->command_channel_p
= Qnil
;
1131 XPROCESS (proc
)->buffer
= buffer
;
1132 XPROCESS (proc
)->sentinel
= Qnil
;
1133 XPROCESS (proc
)->filter
= Qnil
;
1134 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1136 /* Make the process marker point into the process buffer (if any). */
1138 Fset_marker (XPROCESS (proc
)->mark
,
1139 make_number (BUF_ZV (XBUFFER (buffer
))), buffer
);
1141 create_process (proc
, new_argv
, current_dir
);
1143 return unbind_to (count
, proc
);
1146 /* This function is the unwind_protect form for Fstart_process. If
1147 PROC doesn't have its pid set, then we know someone has signaled
1148 an error and the process wasn't started successfully, so we should
1149 remove it from the process list. */
1151 start_process_unwind (proc
)
1154 if (!PROCESSP (proc
))
1157 /* Was PROC started successfully? */
1158 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1159 remove_process (proc
);
1166 create_process_1 (signo
)
1170 /* USG systems forget handlers when they are used;
1171 must reestablish each time */
1172 signal (signo
, create_process_1
);
1176 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1179 /* Mimic blocking of signals on system V, which doesn't really have it. */
1181 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1182 int sigchld_deferred
;
1185 create_process_sigchld ()
1187 signal (SIGCHLD
, create_process_sigchld
);
1189 sigchld_deferred
= 1;
1195 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1196 create_process (process
, new_argv
, current_dir
)
1197 Lisp_Object process
;
1199 Lisp_Object current_dir
;
1201 int pid
, inchannel
, outchannel
;
1203 #ifdef POSIX_SIGNALS
1206 struct sigaction sigint_action
;
1207 struct sigaction sigquit_action
;
1209 struct sigaction sighup_action
;
1211 #else /* !POSIX_SIGNALS */
1213 SIGTYPE (*sigchld
)();
1215 #endif /* !POSIX_SIGNALS */
1216 /* Use volatile to protect variables from being clobbered by longjmp. */
1217 volatile int forkin
, forkout
;
1218 volatile int pty_flag
= 0;
1219 extern char **environ
;
1221 inchannel
= outchannel
= -1;
1224 if (!NILP (Vprocess_connection_type
))
1225 outchannel
= inchannel
= allocate_pty ();
1230 /* On USG systems it does not work to open the pty's tty here
1231 and then close and reopen it in the child. */
1233 /* Don't let this terminal become our controlling terminal
1234 (in case we don't have one). */
1235 forkout
= forkin
= open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1237 forkout
= forkin
= open (pty_name
, O_RDWR
, 0);
1240 report_file_error ("Opening pty", Qnil
);
1242 forkin
= forkout
= -1;
1243 #endif /* not USG */
1247 #endif /* HAVE_PTYS */
1250 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1251 report_file_error ("Opening socketpair", Qnil
);
1252 outchannel
= inchannel
= sv
[0];
1253 forkout
= forkin
= sv
[1];
1255 #else /* not SKTPAIR */
1258 pipe_with_inherited_out (sv
);
1262 pipe_with_inherited_in (sv
);
1265 #else /* not WINDOWSNT */
1272 #endif /* not WINDOWSNT */
1274 #endif /* not SKTPAIR */
1277 /* Replaced by close_process_descs */
1278 set_exclusive_use (inchannel
);
1279 set_exclusive_use (outchannel
);
1282 /* Stride people say it's a mystery why this is needed
1283 as well as the O_NDELAY, but that it fails without this. */
1284 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1287 ioctl (inchannel
, FIONBIO
, &one
);
1292 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1293 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1296 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1297 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1301 /* Record this as an active process, with its channels.
1302 As a result, child_setup will close Emacs's side of the pipes. */
1303 chan_process
[inchannel
] = process
;
1304 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1305 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1306 /* Record the tty descriptor used in the subprocess. */
1308 XPROCESS (process
)->subtty
= Qnil
;
1310 XSETFASTINT (XPROCESS (process
)->subtty
, forkin
);
1311 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1312 XPROCESS (process
)->status
= Qrun
;
1314 /* Delay interrupts until we have a chance to store
1315 the new fork's pid in its process structure */
1316 #ifdef POSIX_SIGNALS
1317 sigemptyset (&blocked
);
1319 sigaddset (&blocked
, SIGCHLD
);
1322 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1323 this sets the parent's signal handlers as well as the child's.
1324 So delay all interrupts whose handlers the child might munge,
1325 and record the current handlers so they can be restored later. */
1326 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1327 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1329 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1331 #endif /* HAVE_VFORK */
1332 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1333 #else /* !POSIX_SIGNALS */
1337 #else /* not BSD4_1 */
1338 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1339 sigsetmask (sigmask (SIGCHLD
));
1340 #else /* ordinary USG */
1342 sigchld_deferred
= 0;
1343 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1345 #endif /* ordinary USG */
1346 #endif /* not BSD4_1 */
1347 #endif /* SIGCHLD */
1348 #endif /* !POSIX_SIGNALS */
1350 FD_SET (inchannel
, &input_wait_mask
);
1351 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1352 if (inchannel
> max_process_desc
)
1353 max_process_desc
= inchannel
;
1355 /* Until we store the proper pid, enable sigchld_handler
1356 to recognize an unknown pid as standing for this process.
1357 It is very important not to let this `marker' value stay
1358 in the table after this function has returned; if it does
1359 it might cause call-process to hang and subsequent asynchronous
1360 processes to get their return values scrambled. */
1361 XSETINT (XPROCESS (process
)->pid
, -1);
1364 /* child_setup must clobber environ on systems with true vfork.
1365 Protect it from permanent change. */
1366 char **save_environ
= environ
;
1371 #endif /* not WINDOWSNT */
1373 int xforkin
= forkin
;
1374 int xforkout
= forkout
;
1376 #if 0 /* This was probably a mistake--it duplicates code later on,
1377 but fails to handle all the cases. */
1378 /* Make sure SIGCHLD is not blocked in the child. */
1379 sigsetmask (SIGEMPTYMASK
);
1382 /* Make the pty be the controlling terminal of the process. */
1384 /* First, disconnect its current controlling terminal. */
1386 /* We tried doing setsid only if pty_flag, but it caused
1387 process_set_signal to fail on SGI when using a pipe. */
1389 /* Make the pty's terminal the controlling terminal. */
1393 /* We ignore the return value
1394 because faith@cs.unc.edu says that is necessary on Linux. */
1395 ioctl (xforkin
, TIOCSCTTY
, 0);
1398 #else /* not HAVE_SETSID */
1400 /* It's very important to call setpgrp here and no time
1401 afterwards. Otherwise, we lose our controlling tty which
1402 is set when we open the pty. */
1405 #endif /* not HAVE_SETSID */
1406 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1407 if (pty_flag
&& xforkin
>= 0)
1410 tcgetattr (xforkin
, &t
);
1412 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1413 write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1416 #if defined (NTTYDISC) && defined (TIOCSETD)
1417 if (pty_flag
&& xforkin
>= 0)
1419 /* Use new line discipline. */
1420 int ldisc
= NTTYDISC
;
1421 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1426 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1427 can do TIOCSPGRP only to the process's controlling tty. */
1430 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1431 I can't test it since I don't have 4.3. */
1432 int j
= open ("/dev/tty", O_RDWR
, 0);
1433 ioctl (j
, TIOCNOTTY
, 0);
1436 /* In order to get a controlling terminal on some versions
1437 of BSD, it is necessary to put the process in pgrp 0
1438 before it opens the terminal. */
1446 #endif /* TIOCNOTTY */
1448 #if !defined (RTU) && !defined (UNIPLUS)
1449 /*** There is a suggestion that this ought to be a
1450 conditional on TIOCSPGRP. */
1451 /* Now close the pty (if we had it open) and reopen it.
1452 This makes the pty the controlling terminal of the subprocess. */
1455 #ifdef SET_CHILD_PTY_PGRP
1456 int pgrp
= getpid ();
1459 /* I wonder if close (open (pty_name, ...)) would work? */
1462 xforkout
= xforkin
= open (pty_name
, O_RDWR
, 0);
1466 write (1, "Couldn't open the pty terminal ", 31);
1467 write (1, pty_name
, strlen (pty_name
));
1472 #ifdef SET_CHILD_PTY_PGRP
1473 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1474 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1477 #endif /* not UNIPLUS and not RTU */
1478 #ifdef SETUP_SLAVE_PTY
1483 #endif /* SETUP_SLAVE_PTY */
1485 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1486 Now reenable it in the child, so it will die when we want it to. */
1488 signal (SIGHUP
, SIG_DFL
);
1490 #endif /* HAVE_PTYS */
1492 signal (SIGINT
, SIG_DFL
);
1493 signal (SIGQUIT
, SIG_DFL
);
1495 /* Stop blocking signals in the child. */
1496 #ifdef POSIX_SIGNALS
1497 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1498 #else /* !POSIX_SIGNALS */
1502 #else /* not BSD4_1 */
1503 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1504 sigsetmask (SIGEMPTYMASK
);
1505 #else /* ordinary USG */
1507 signal (SIGCHLD
, sigchld
);
1509 #endif /* ordinary USG */
1510 #endif /* not BSD4_1 */
1511 #endif /* SIGCHLD */
1512 #endif /* !POSIX_SIGNALS */
1515 child_setup_tty (xforkout
);
1517 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1518 new_argv
, 1, current_dir
);
1519 #else /* not WINDOWSNT */
1520 child_setup (xforkin
, xforkout
, xforkout
,
1521 new_argv
, 1, current_dir
);
1522 #endif /* not WINDOWSNT */
1524 environ
= save_environ
;
1527 /* This runs in the Emacs process. */
1532 if (forkin
!= forkout
&& forkout
>= 0)
1537 /* vfork succeeded. */
1538 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
1541 register_child (pid
, inchannel
);
1542 #endif /* WINDOWSNT */
1544 /* If the subfork execv fails, and it exits,
1545 this close hangs. I don't know why.
1546 So have an interrupt jar it loose. */
1548 signal (SIGALRM
, create_process_1
);
1550 XPROCESS (process
)->subtty
= Qnil
;
1555 if (forkin
!= forkout
&& forkout
>= 0)
1560 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1563 XPROCESS (process
)->tty_name
= Qnil
;
1566 /* Restore the signal state whether vfork succeeded or not.
1567 (We will signal an error, below, if it failed.) */
1568 #ifdef POSIX_SIGNALS
1570 /* Restore the parent's signal handlers. */
1571 sigaction (SIGINT
, &sigint_action
, 0);
1572 sigaction (SIGQUIT
, &sigquit_action
, 0);
1574 sigaction (SIGHUP
, &sighup_action
, 0);
1576 #endif /* HAVE_VFORK */
1577 /* Stop blocking signals in the parent. */
1578 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1579 #else /* !POSIX_SIGNALS */
1583 #else /* not BSD4_1 */
1584 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1585 sigsetmask (SIGEMPTYMASK
);
1586 #else /* ordinary USG */
1588 signal (SIGCHLD
, sigchld
);
1589 /* Now really handle any of these signals
1590 that came in during this function. */
1591 if (sigchld_deferred
)
1592 kill (getpid (), SIGCHLD
);
1594 #endif /* ordinary USG */
1595 #endif /* not BSD4_1 */
1596 #endif /* SIGCHLD */
1597 #endif /* !POSIX_SIGNALS */
1599 /* Now generate the error if vfork failed. */
1601 report_file_error ("Doing vfork", Qnil
);
1603 #endif /* not VMS */
1607 /* open a TCP network connection to a given HOST/SERVICE. Treated
1608 exactly like a normal process when reading and writing. Only
1609 differences are in status display and process deletion. A network
1610 connection has no PID; you cannot signal it. All you can do is
1611 deactivate and close it via delete-process */
1613 DEFUN ("open-network-stream", Fopen_network_stream
, Sopen_network_stream
,
1615 "Open a TCP connection for a service to a host.\n\
1616 Returns a subprocess-object to represent the connection.\n\
1617 Input and output work as for subprocesses; `delete-process' closes it.\n\
1618 Args are NAME BUFFER HOST SERVICE.\n\
1619 NAME is name for process. It is modified if necessary to make it unique.\n\
1620 BUFFER is the buffer (or buffer-name) to associate with the process.\n\
1621 Process output goes at end of that buffer, unless you specify\n\
1622 an output stream or filter function to handle the output.\n\
1623 BUFFER may be also nil, meaning that this process is not associated\n\
1625 Third arg is name of the host to connect to, or its IP address.\n\
1626 Fourth arg SERVICE is name of the service desired, or an integer\n\
1627 specifying a port number to connect to.")
1628 (name
, buffer
, host
, service
)
1629 Lisp_Object name
, buffer
, host
, service
;
1633 struct sockaddr_in address
;
1634 struct servent
*svc_info
;
1635 struct hostent
*host_info_ptr
, host_info
;
1636 char *(addr_list
[2]);
1637 IN_ADDR numeric_addr
;
1641 struct hostent host_info_fixed
;
1642 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1644 int count
= specpdl_ptr
- specpdl
;
1646 GCPRO4 (name
, buffer
, host
, service
);
1647 CHECK_STRING (name
, 0);
1648 CHECK_STRING (host
, 0);
1649 if (INTEGERP (service
))
1650 port
= htons ((unsigned short) XINT (service
));
1653 CHECK_STRING (service
, 0);
1654 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
1656 error ("Unknown service \"%s\"", XSTRING (service
)->data
);
1657 port
= svc_info
->s_port
;
1660 /* Slow down polling to every ten seconds.
1661 Some kernels have a bug which causes retrying connect to fail
1662 after a connect. Polling can interfere with gethostbyname too. */
1663 #ifdef POLL_FOR_INPUT
1664 bind_polling_period (10);
1675 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
1678 if (! (host_info_ptr
== 0 && h_errno
== TRY_AGAIN
))
1681 Fsleep_for (make_number (1), Qnil
);
1683 if (host_info_ptr
== 0)
1684 /* Attempt to interpret host as numeric inet address */
1686 numeric_addr
= inet_addr ((char *) XSTRING (host
)->data
);
1687 if (NUMERIC_ADDR_ERROR
)
1688 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
1690 host_info_ptr
= &host_info
;
1691 host_info
.h_name
= 0;
1692 host_info
.h_aliases
= 0;
1693 host_info
.h_addrtype
= AF_INET
;
1695 /* Older machines have only one address slot called h_addr.
1696 Newer machines have h_addr_list, but #define h_addr to
1697 be its first element. */
1698 host_info
.h_addr_list
= &(addr_list
[0]);
1700 host_info
.h_addr
= (char*)(&numeric_addr
);
1702 /* numeric_addr isn't null-terminated; it has fixed length. */
1703 host_info
.h_length
= sizeof (numeric_addr
);
1706 bzero (&address
, sizeof address
);
1707 bcopy (host_info_ptr
->h_addr
, (char *) &address
.sin_addr
,
1708 host_info_ptr
->h_length
);
1709 address
.sin_family
= host_info_ptr
->h_addrtype
;
1710 address
.sin_port
= port
;
1712 s
= socket (host_info_ptr
->h_addrtype
, SOCK_STREAM
, 0);
1714 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1716 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
1717 when connect is interrupted. So let's not let it get interrupted.
1718 Note we do not turn off polling, because polling is only used
1719 when not interrupt_input, and thus not normally used on the systems
1720 which have this bug. On systems which use polling, there's no way
1721 to quit if polling is turned off. */
1722 if (interrupt_input
)
1730 if (connect (s
, (struct sockaddr
*) &address
, sizeof address
) == -1
1731 && errno
!= EISCONN
)
1739 if (errno
== EADDRINUSE
&& retry
< 20)
1741 /* A delay here is needed on some FreeBSD systems,
1742 and it is harmless, since this retrying takes time anyway
1743 and should be infrequent. */
1744 Fsleep_for (make_number (1), Qnil
);
1751 if (interrupt_input
)
1755 report_file_error ("connection failed",
1756 Fcons (host
, Fcons (name
, Qnil
)));
1761 #ifdef POLL_FOR_INPUT
1762 unbind_to (count
, Qnil
);
1765 if (interrupt_input
)
1769 s
= connect_server (0);
1771 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1772 send_command (s
, C_PORT
, 0, "%s:%d", XSTRING (host
)->data
, ntohs (port
));
1773 send_command (s
, C_DUMB
, 1, 0);
1779 report_file_error ("error duplicating socket", Fcons (name
, Qnil
));
1782 buffer
= Fget_buffer_create (buffer
);
1783 proc
= make_process (name
);
1785 chan_process
[inch
] = proc
;
1788 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
1791 fcntl (inch
, F_SETFL
, O_NDELAY
);
1795 XPROCESS (proc
)->childp
= host
;
1796 XPROCESS (proc
)->command_channel_p
= Qnil
;
1797 XPROCESS (proc
)->buffer
= buffer
;
1798 XPROCESS (proc
)->sentinel
= Qnil
;
1799 XPROCESS (proc
)->filter
= Qnil
;
1800 XPROCESS (proc
)->command
= Qnil
;
1801 XPROCESS (proc
)->pid
= Qnil
;
1802 XSETINT (XPROCESS (proc
)->infd
, s
);
1803 XSETINT (XPROCESS (proc
)->outfd
, outch
);
1804 XPROCESS (proc
)->status
= Qrun
;
1805 FD_SET (inch
, &input_wait_mask
);
1806 FD_SET (inch
, &non_keyboard_wait_mask
);
1807 if (inch
> max_process_desc
)
1808 max_process_desc
= inch
;
1813 #endif /* HAVE_SOCKETS */
1815 deactivate_process (proc
)
1818 register int inchannel
, outchannel
;
1819 register struct Lisp_Process
*p
= XPROCESS (proc
);
1821 inchannel
= XINT (p
->infd
);
1822 outchannel
= XINT (p
->outfd
);
1826 /* Beware SIGCHLD hereabouts. */
1827 flush_pending_output (inchannel
);
1830 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
1831 sys$
dassgn (outchannel
);
1832 vs
= get_vms_process_pointer (p
->pid
);
1834 give_back_vms_process_stuff (vs
);
1838 if (outchannel
>= 0 && outchannel
!= inchannel
)
1842 XSETINT (p
->infd
, -1);
1843 XSETINT (p
->outfd
, -1);
1844 chan_process
[inchannel
] = Qnil
;
1845 FD_CLR (inchannel
, &input_wait_mask
);
1846 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
1847 if (inchannel
== max_process_desc
)
1850 /* We just closed the highest-numbered process input descriptor,
1851 so recompute the highest-numbered one now. */
1852 max_process_desc
= 0;
1853 for (i
= 0; i
< MAXDESC
; i
++)
1854 if (!NILP (chan_process
[i
]))
1855 max_process_desc
= i
;
1860 /* Close all descriptors currently in use for communication
1861 with subprocess. This is used in a newly-forked subprocess
1862 to get rid of irrelevant descriptors. */
1864 close_process_descs ()
1868 for (i
= 0; i
< MAXDESC
; i
++)
1870 Lisp_Object process
;
1871 process
= chan_process
[i
];
1872 if (!NILP (process
))
1874 int in
= XINT (XPROCESS (process
)->infd
);
1875 int out
= XINT (XPROCESS (process
)->outfd
);
1878 if (out
>= 0 && in
!= out
)
1885 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
1887 "Allow any pending output from subprocesses to be read by Emacs.\n\
1888 It is read into the process' buffers or given to their filter functions.\n\
1889 Non-nil arg PROCESS means do not return until some output has been received\n\
1891 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
1892 seconds and microseconds to wait; return after that much time whether\n\
1893 or not there is input.\n\
1894 Return non-nil iff we received any output before the timeout expired.")
1895 (process
, timeout
, timeout_msecs
)
1896 register Lisp_Object process
, timeout
, timeout_msecs
;
1901 if (! NILP (timeout_msecs
))
1903 CHECK_NUMBER (timeout_msecs
, 2);
1904 useconds
= XINT (timeout_msecs
);
1905 if (!INTEGERP (timeout
))
1906 XSETINT (timeout
, 0);
1909 int carry
= useconds
/ 1000000;
1911 XSETINT (timeout
, XINT (timeout
) + carry
);
1912 useconds
-= carry
* 1000000;
1914 /* I think this clause is necessary because C doesn't
1915 guarantee a particular rounding direction for negative
1919 XSETINT (timeout
, XINT (timeout
) - 1);
1920 useconds
+= 1000000;
1927 if (! NILP (timeout
))
1929 CHECK_NUMBER (timeout
, 1);
1930 seconds
= XINT (timeout
);
1931 if (seconds
< 0 || (seconds
== 0 && useconds
== 0))
1943 XSETFASTINT (process
, 0);
1946 (wait_reading_process_input (seconds
, useconds
, process
, 0)
1950 /* This variable is different from waiting_for_input in keyboard.c.
1951 It is used to communicate to a lisp process-filter/sentinel (via the
1952 function Fwaiting_for_user_input_p below) whether emacs was waiting
1953 for user-input when that process-filter was called.
1954 waiting_for_input cannot be used as that is by definition 0 when
1955 lisp code is being evalled.
1956 This is also used in record_asynch_buffer_change.
1957 For that purpose, this must be 0
1958 when not inside wait_reading_process_input. */
1959 static int waiting_for_user_input_p
;
1961 /* Read and dispose of subprocess output while waiting for timeout to
1962 elapse and/or keyboard input to be available.
1965 timeout in seconds, or
1966 zero for no limit, or
1967 -1 means gobble data immediately available but don't wait for any.
1970 an additional duration to wait, measured in microseconds.
1971 If this is nonzero and time_limit is 0, then the timeout
1972 consists of MICROSECS only.
1974 READ_KBD is a lisp value:
1975 0 to ignore keyboard input, or
1976 1 to return when input is available, or
1977 -1 meaning caller will actually read the input, so don't throw to
1978 the quit handler, or
1979 a cons cell, meaning wait until its car is non-nil
1980 (and gobble terminal input into the buffer if any arrives), or
1981 a process object, meaning wait until something arrives from that
1982 process. The return value is true iff we read some input from
1985 DO_DISPLAY != 0 means redisplay should be done to show subprocess
1986 output that arrives.
1988 If READ_KBD is a pointer to a struct Lisp_Process, then the
1989 function returns true iff we received input from that process
1990 before the timeout elapsed.
1991 Otherwise, return true iff we received input from any process. */
1993 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
1994 int time_limit
, microsecs
;
1995 Lisp_Object read_kbd
;
1998 register int channel
, nfds
, m
;
1999 static SELECT_TYPE Available
;
2002 EMACS_TIME timeout
, end_time
, garbage
;
2004 int wait_channel
= -1;
2005 struct Lisp_Process
*wait_proc
= 0;
2006 int got_some_input
= 0;
2007 Lisp_Object
*wait_for_cell
= 0;
2009 FD_ZERO (&Available
);
2011 /* If read_kbd is a process to watch, set wait_proc and wait_channel
2013 if (PROCESSP (read_kbd
))
2015 wait_proc
= XPROCESS (read_kbd
);
2016 wait_channel
= XINT (wait_proc
->infd
);
2017 XSETFASTINT (read_kbd
, 0);
2020 /* If waiting for non-nil in a cell, record where. */
2021 if (CONSP (read_kbd
))
2023 wait_for_cell
= &XCONS (read_kbd
)->car
;
2024 XSETFASTINT (read_kbd
, 0);
2027 waiting_for_user_input_p
= XINT (read_kbd
);
2029 /* Since we may need to wait several times,
2030 compute the absolute time to return at. */
2031 if (time_limit
|| microsecs
)
2033 EMACS_GET_TIME (end_time
);
2034 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
2035 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
2040 int timeout_reduced_for_timers
= 0;
2042 /* If calling from keyboard input, do not quit
2043 since we want to return C-g as an input character.
2044 Otherwise, do pending quit if requested. */
2045 if (XINT (read_kbd
) >= 0)
2048 /* Exit now if the cell we're waiting for became non-nil. */
2049 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2052 /* Compute time from now till when time limit is up */
2053 /* Exit if already run out */
2054 if (time_limit
== -1)
2056 /* -1 specified for timeout means
2057 gobble output available now
2058 but don't wait at all. */
2060 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2062 else if (time_limit
|| microsecs
)
2064 EMACS_GET_TIME (timeout
);
2065 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
2066 if (EMACS_TIME_NEG_P (timeout
))
2071 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
2074 /* If our caller will not immediately handle keyboard events,
2075 run timer events directly.
2076 (Callers that will immediately read keyboard events
2077 call timer_delay on their own.) */
2080 EMACS_TIME timer_delay
;
2081 timer_delay
= timer_check (1);
2082 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
2084 EMACS_TIME difference
;
2085 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
2086 if (EMACS_TIME_NEG_P (difference
))
2088 timeout
= timer_delay
;
2089 timeout_reduced_for_timers
= 1;
2094 /* Cause C-g and alarm signals to take immediate action,
2095 and cause input available signals to zero out timeout.
2097 It is important that we do this before checking for process
2098 activity. If we get a SIGCHLD after the explicit checks for
2099 process activity, timeout is the only way we will know. */
2100 if (XINT (read_kbd
) < 0)
2101 set_waiting_for_input (&timeout
);
2103 /* If status of something has changed, and no input is
2104 available, notify the user of the change right away. After
2105 this explicit check, we'll let the SIGCHLD handler zap
2106 timeout to get our attention. */
2107 if (update_tick
!= process_tick
&& do_display
)
2109 Atemp
= input_wait_mask
;
2110 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2111 if ((select (MAXDESC
, &Atemp
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2115 /* It's okay for us to do this and then continue with
2116 the loop, since timeout has already been zeroed out. */
2117 clear_waiting_for_input ();
2122 /* Don't wait for output from a non-running process. */
2123 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
2124 update_status (wait_proc
);
2126 && ! EQ (wait_proc
->status
, Qrun
))
2128 clear_waiting_for_input ();
2132 /* Wait till there is something to do */
2134 if (! XINT (read_kbd
) && wait_for_cell
== 0)
2135 Available
= non_keyboard_wait_mask
;
2137 Available
= input_wait_mask
;
2139 /* If frame size has changed or the window is newly mapped,
2140 redisplay now, before we start to wait. There is a race
2141 condition here; if a SIGIO arrives between now and the select
2142 and indicates that a frame is trashed, the select may block
2143 displaying a trashed screen. */
2144 if (frame_garbaged
&& do_display
)
2146 clear_waiting_for_input ();
2147 redisplay_preserve_echo_area ();
2148 if (XINT (read_kbd
) < 0)
2149 set_waiting_for_input (&timeout
);
2152 if (XINT (read_kbd
) && detect_input_pending ())
2155 FD_ZERO (&Available
);
2158 nfds
= select (MAXDESC
, &Available
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2163 /* Make C-g and alarm signals set flags again */
2164 clear_waiting_for_input ();
2166 /* If we woke up due to SIGWINCH, actually change size now. */
2167 do_pending_window_change ();
2169 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
2170 /* We wanted the full specified time, so return now. */
2174 if (xerrno
== EINTR
)
2175 FD_ZERO (&Available
);
2177 /* Ultrix select seems to return ENOMEM when it is
2178 interrupted. Treat it just like EINTR. Bleah. Note
2179 that we want to test for the "ultrix" CPP symbol, not
2180 "__ultrix__"; the latter is only defined under GCC, but
2181 not by DEC's bundled CC. -JimB */
2182 else if (xerrno
== ENOMEM
)
2183 FD_ZERO (&Available
);
2186 /* This happens for no known reason on ALLIANT.
2187 I am guessing that this is the right response. -- RMS. */
2188 else if (xerrno
== EFAULT
)
2189 FD_ZERO (&Available
);
2191 else if (xerrno
== EBADF
)
2194 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
2195 the child's closure of the pts gives the parent a SIGHUP, and
2196 the ptc file descriptor is automatically closed,
2197 yielding EBADF here or at select() call above.
2198 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
2199 in m/ibmrt-aix.h), and here we just ignore the select error.
2200 Cleanup occurs c/o status_notify after SIGCLD. */
2201 FD_ZERO (&Available
); /* Cannot depend on values returned */
2207 error ("select error: %s", strerror (xerrno
));
2209 #if defined(sun) && !defined(USG5_4)
2210 else if (nfds
> 0 && keyboard_bit_set (&Available
)
2212 /* System sometimes fails to deliver SIGIO.
2214 David J. Mackenzie says that Emacs doesn't compile under
2215 Solaris if this code is enabled, thus the USG5_4 in the CPP
2216 conditional. "I haven't noticed any ill effects so far.
2217 If you find a Solaris expert somewhere, they might know
2219 kill (getpid (), SIGIO
);
2222 /* Check for keyboard input */
2223 /* If there is any, return immediately
2224 to give it higher priority than subprocesses */
2226 if (XINT (read_kbd
) < 0 && detect_input_pending ())
2228 swallow_events (do_display
);
2229 if (detect_input_pending ())
2233 if ((XINT (read_kbd
) > 0 || wait_for_cell
)
2234 && detect_input_pending_run_timers (do_display
))
2236 swallow_events (do_display
);
2237 if (detect_input_pending_run_timers (do_display
))
2241 /* Exit now if the cell we're waiting for became non-nil. */
2242 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2246 /* If we think we have keyboard input waiting, but didn't get SIGIO
2247 go read it. This can happen with X on BSD after logging out.
2248 In that case, there really is no input and no SIGIO,
2249 but select says there is input. */
2251 if (XINT (read_kbd
) && interrupt_input
2252 && (keyboard_bit_set (&Available
)))
2253 kill (getpid (), SIGIO
);
2257 got_some_input
|= nfds
> 0;
2259 /* If checking input just got us a size-change event from X,
2260 obey it now if we should. */
2261 if (XINT (read_kbd
) || wait_for_cell
)
2262 do_pending_window_change ();
2264 /* Check for data from a process. */
2265 /* Really FIRST_PROC_DESC should be 0 on Unix,
2266 but this is safer in the short run. */
2267 for (channel
= 0; channel
<= max_process_desc
; channel
++)
2269 if (FD_ISSET (channel
, &Available
)
2270 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
2274 /* If waiting for this channel, arrange to return as
2275 soon as no more input to be processed. No more
2277 if (wait_channel
== channel
)
2283 proc
= chan_process
[channel
];
2287 /* Read data from the process, starting with our
2288 buffered-ahead character if we have one. */
2290 nread
= read_process_output (proc
, channel
);
2293 /* Since read_process_output can run a filter,
2294 which can call accept-process-output,
2295 don't try to read from any other processes
2296 before doing the select again. */
2297 FD_ZERO (&Available
);
2300 redisplay_preserve_echo_area ();
2303 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2307 else if (nread
== -1 && errno
== EAGAIN
)
2311 else if (nread
== -1 && errno
== EAGAIN
)
2313 /* Note that we cannot distinguish between no input
2314 available now and a closed pipe.
2315 With luck, a closed pipe will be accompanied by
2316 subprocess termination and SIGCHLD. */
2317 else if (nread
== 0 && !NETCONN_P (proc
))
2319 #endif /* O_NDELAY */
2320 #endif /* O_NONBLOCK */
2321 #endif /* EWOULDBLOCK */
2323 /* On some OSs with ptys, when the process on one end of
2324 a pty exits, the other end gets an error reading with
2325 errno = EIO instead of getting an EOF (0 bytes read).
2326 Therefore, if we get an error reading and errno =
2327 EIO, just continue, because the child process has
2328 exited and should clean itself up soon (e.g. when we
2330 else if (nread
== -1 && errno
== EIO
)
2332 #endif /* HAVE_PTYS */
2333 /* If we can detect process termination, don't consider the process
2334 gone just because its pipe is closed. */
2336 else if (nread
== 0 && !NETCONN_P (proc
))
2341 /* Preserve status of processes already terminated. */
2342 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2343 deactivate_process (proc
);
2344 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2345 update_status (XPROCESS (proc
));
2346 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2347 XPROCESS (proc
)->status
2348 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2351 } /* end for each file descriptor */
2352 } /* end while exit conditions not met */
2354 waiting_for_user_input_p
= 0;
2356 /* If calling from keyboard input, do not quit
2357 since we want to return C-g as an input character.
2358 Otherwise, do pending quit if requested. */
2359 if (XINT (read_kbd
) >= 0)
2361 /* Prevent input_pending from remaining set if we quit. */
2362 clear_input_pending ();
2366 return got_some_input
;
2369 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
2372 read_process_output_call (fun_and_args
)
2373 Lisp_Object fun_and_args
;
2375 return apply1 (XCONS (fun_and_args
)->car
, XCONS (fun_and_args
)->cdr
);
2379 read_process_output_error_handler (error
)
2382 cmd_error_internal (error
, "error in process filter: ");
2384 update_echo_area ();
2385 Fsleep_for (make_number (2), Qnil
);
2388 /* Read pending output from the process channel,
2389 starting with our buffered-ahead character if we have one.
2390 Yield number of characters read.
2392 This function reads at most 1024 characters.
2393 If you want to read all available subprocess output,
2394 you must call it repeatedly until it returns zero. */
2396 read_process_output (proc
, channel
)
2398 register int channel
;
2400 register int nchars
;
2406 register Lisp_Object outstream
;
2407 register struct buffer
*old
= current_buffer
;
2408 register struct Lisp_Process
*p
= XPROCESS (proc
);
2409 register int opoint
;
2412 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2414 vs
= get_vms_process_pointer (p
->pid
);
2418 return(0); /* Really weird if it does this */
2419 if (!(vs
->iosb
[0] & 1))
2420 return -1; /* I/O error */
2423 error ("Could not get VMS process pointer");
2424 chars
= vs
->inputBuffer
;
2425 nchars
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2428 start_vms_process_read (vs
); /* Crank up the next read on the process */
2429 return 1; /* Nothing worth printing, say we got 1 */
2433 if (proc_buffered_char
[channel
] < 0)
2435 nchars
= read_child_output (channel
, chars
, sizeof (chars
));
2437 nchars
= read (channel
, chars
, sizeof chars
);
2441 chars
[0] = proc_buffered_char
[channel
];
2442 proc_buffered_char
[channel
] = -1;
2444 nchars
= read_child_output (channel
, chars
+ 1, sizeof (chars
) - 1);
2446 nchars
= read (channel
, chars
+ 1, sizeof chars
- 1);
2451 nchars
= nchars
+ 1;
2453 #endif /* not VMS */
2455 if (nchars
<= 0) return nchars
;
2457 outstream
= p
->filter
;
2458 if (!NILP (outstream
))
2460 /* We inhibit quit here instead of just catching it so that
2461 hitting ^G when a filter happens to be running won't screw
2463 int count
= specpdl_ptr
- specpdl
;
2464 Lisp_Object odeactivate
;
2465 Lisp_Object obuffer
, okeymap
;
2467 /* No need to gcpro these, because all we do with them later
2468 is test them for EQness, and none of them should be a string. */
2469 odeactivate
= Vdeactivate_mark
;
2470 XSETBUFFER (obuffer
, current_buffer
);
2471 okeymap
= current_buffer
->keymap
;
2473 specbind (Qinhibit_quit
, Qt
);
2474 specbind (Qlast_nonmenu_event
, Qt
);
2476 running_asynch_code
= 1;
2477 internal_condition_case_1 (read_process_output_call
,
2480 Fcons (make_string (chars
,
2483 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
2484 read_process_output_error_handler
);
2485 running_asynch_code
= 0;
2486 restore_match_data ();
2488 /* Handling the process output should not deactivate the mark. */
2489 Vdeactivate_mark
= odeactivate
;
2491 #if 0 /* Call record_asynch_buffer_change unconditionally,
2492 because we might have changed minor modes or other things
2493 that affect key bindings. */
2494 if (! EQ (Fcurrent_buffer (), obuffer
)
2495 || ! EQ (current_buffer
->keymap
, okeymap
))
2497 /* But do it only if the caller is actually going to read events.
2498 Otherwise there's no need to make him wake up, and it could
2499 cause trouble (for example it would make Fsit_for return). */
2500 if (waiting_for_user_input_p
== -1)
2501 record_asynch_buffer_change ();
2504 start_vms_process_read (vs
);
2506 unbind_to (count
, Qnil
);
2510 /* If no filter, write into buffer if it isn't dead. */
2511 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2513 Lisp_Object old_read_only
;
2514 Lisp_Object old_begv
, old_zv
;
2515 Lisp_Object odeactivate
;
2517 odeactivate
= Vdeactivate_mark
;
2519 Fset_buffer (p
->buffer
);
2521 old_read_only
= current_buffer
->read_only
;
2522 XSETFASTINT (old_begv
, BEGV
);
2523 XSETFASTINT (old_zv
, ZV
);
2525 current_buffer
->read_only
= Qnil
;
2527 /* Insert new output into buffer
2528 at the current end-of-output marker,
2529 thus preserving logical ordering of input and output. */
2530 if (XMARKER (p
->mark
)->buffer
)
2531 SET_PT (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
));
2535 /* If the output marker is outside of the visible region, save
2536 the restriction and widen. */
2537 if (! (BEGV
<= point
&& point
<= ZV
))
2540 /* Make sure opoint floats ahead of any new text, just as point
2542 if (point
<= opoint
)
2545 /* Insert after old_begv, but before old_zv. */
2546 if (point
< XFASTINT (old_begv
))
2547 XSETFASTINT (old_begv
, XFASTINT (old_begv
) + nchars
);
2548 if (point
<= XFASTINT (old_zv
))
2549 XSETFASTINT (old_zv
, XFASTINT (old_zv
) + nchars
);
2551 /* Insert before markers in case we are inserting where
2552 the buffer's mark is, and the user's next command is Meta-y. */
2553 insert_before_markers (chars
, nchars
);
2554 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
2556 update_mode_lines
++;
2558 /* If the restriction isn't what it should be, set it. */
2559 if (XFASTINT (old_begv
) != BEGV
|| XFASTINT (old_zv
) != ZV
)
2560 Fnarrow_to_region (old_begv
, old_zv
);
2562 /* Handling the process output should not deactivate the mark. */
2563 Vdeactivate_mark
= odeactivate
;
2565 current_buffer
->read_only
= old_read_only
;
2567 set_buffer_internal (old
);
2570 start_vms_process_read (vs
);
2575 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
2577 "Returns non-nil if emacs is waiting for input from the user.\n\
2578 This is intended for use by asynchronous process output filters and sentinels.")
2581 return (waiting_for_user_input_p
? Qt
: Qnil
);
2584 /* Sending data to subprocess */
2586 jmp_buf send_process_frame
;
2589 send_process_trap ()
2595 longjmp (send_process_frame
, 1);
2598 /* Send some data to process PROC.
2599 BUF is the beginning of the data; LEN is the number of characters.
2600 OBJECT is the Lisp object that the data comes from. */
2602 send_process (proc
, buf
, len
, object
)
2603 volatile Lisp_Object proc
;
2608 /* Use volatile to protect variables from being clobbered by longjmp. */
2610 volatile unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
2613 struct Lisp_Process
*p
= XPROCESS (proc
);
2614 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2617 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2618 update_status (XPROCESS (proc
));
2619 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2620 error ("Process %s not running", procname
);
2623 vs
= get_vms_process_pointer (p
->pid
);
2625 error ("Could not find this process: %x", p
->pid
);
2626 else if (write_to_vms_process (vs
, buf
, len
))
2630 if (pty_max_bytes
== 0)
2632 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
2633 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
2635 if (pty_max_bytes
< 0)
2636 pty_max_bytes
= 250;
2638 pty_max_bytes
= 250;
2640 /* Deduct one, to leave space for the eof. */
2644 if (!setjmp (send_process_frame
))
2648 SIGTYPE (*old_sigpipe
)();
2651 /* Decide how much data we can send in one batch.
2652 Long lines need to be split into multiple batches. */
2653 if (!NILP (XPROCESS (proc
)->pty_flag
))
2655 /* Starting this at zero is always correct when not the first iteration
2656 because the previous iteration ended by sending C-d.
2657 It may not be correct for the first iteration
2658 if a partial line was sent in a separate send_process call.
2659 If that proves worth handling, we need to save linepos
2660 in the process object. */
2663 char *end
= buf
+ len
;
2665 /* Scan through this text for a line that is too long. */
2666 while (ptr
!= end
&& linepos
< pty_max_bytes
)
2674 /* If we found one, break the line there
2675 and put in a C-d to force the buffer through. */
2679 /* Send this batch, using one or more write calls. */
2682 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
2683 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
2684 signal (SIGPIPE
, old_sigpipe
);
2690 || errno
== EWOULDBLOCK
2696 /* Buffer is full. Wait, accepting input;
2697 that may allow the program
2698 to finish doing output and read more. */
2703 /* Running filters might relocate buffers or strings.
2704 Arrange to relocate BUF. */
2705 if (BUFFERP (object
))
2706 offset
= BUF_PTR_CHAR_POS (XBUFFER (object
),
2707 (unsigned char *) buf
);
2708 else if (STRINGP (object
))
2709 offset
= buf
- (char *) XSTRING (object
)->data
;
2711 XSETFASTINT (zero
, 0);
2712 wait_reading_process_input (1, 0, zero
, 0);
2714 if (BUFFERP (object
))
2715 buf
= (char *) BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
2716 else if (STRINGP (object
))
2717 buf
= offset
+ (char *) XSTRING (object
)->data
;
2722 /* This is a real error. */
2723 report_file_error ("writing to process", Fcons (proc
, Qnil
));
2730 /* If we sent just part of the string, put in an EOF
2731 to force it through, before we send the rest. */
2733 Fprocess_send_eof (proc
);
2738 XPROCESS (proc
)->raw_status_low
= Qnil
;
2739 XPROCESS (proc
)->raw_status_high
= Qnil
;
2740 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2741 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2742 deactivate_process (proc
);
2744 error ("Error writing to process %s; closed it", procname
);
2746 error ("SIGPIPE raised on process %s; closed it", procname
);
2751 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
2753 "Send current contents of region as input to PROCESS.\n\
2754 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2755 nil, indicating the current buffer's process.\n\
2756 Called from program, takes three arguments, PROCESS, START and END.\n\
2757 If the region is more than 500 characters long,\n\
2758 it is sent in several bunches. This may happen even for shorter regions.\n\
2759 Output from processes can arrive in between bunches.")
2760 (process
, start
, end
)
2761 Lisp_Object process
, start
, end
;
2766 proc
= get_process (process
);
2767 validate_region (&start
, &end
);
2769 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
2772 start1
= XINT (start
);
2773 send_process (proc
, &FETCH_CHAR (start1
), XINT (end
) - XINT (start
),
2774 Fcurrent_buffer ());
2779 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
2781 "Send PROCESS the contents of STRING as input.\n\
2782 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2783 nil, indicating the current buffer's process.\n\
2784 If STRING is more than 500 characters long,\n\
2785 it is sent in several bunches. This may happen even for shorter strings.\n\
2786 Output from processes can arrive in between bunches.")
2788 Lisp_Object process
, string
;
2791 CHECK_STRING (string
, 1);
2792 proc
= get_process (process
);
2793 send_process (proc
, XSTRING (string
)->data
, XSTRING (string
)->size
, string
);
2797 /* send a signal number SIGNO to PROCESS.
2798 CURRENT_GROUP means send to the process group that currently owns
2799 the terminal being used to communicate with PROCESS.
2800 This is used for various commands in shell mode.
2801 If NOMSG is zero, insert signal-announcements into process's buffers
2804 If we can, we try to signal PROCESS by sending control characters
2805 down the pty. This allows us to signal inferiors who have changed
2806 their uid, for which killpg would return an EPERM error. */
2809 process_send_signal (process
, signo
, current_group
, nomsg
)
2810 Lisp_Object process
;
2812 Lisp_Object current_group
;
2816 register struct Lisp_Process
*p
;
2820 proc
= get_process (process
);
2821 p
= XPROCESS (proc
);
2823 if (!EQ (p
->childp
, Qt
))
2824 error ("Process %s is not a subprocess",
2825 XSTRING (p
->name
)->data
);
2826 if (XINT (p
->infd
) < 0)
2827 error ("Process %s is not active",
2828 XSTRING (p
->name
)->data
);
2830 if (NILP (p
->pty_flag
))
2831 current_group
= Qnil
;
2833 /* If we are using pgrps, get a pgrp number and make it negative. */
2834 if (!NILP (current_group
))
2836 #ifdef SIGNALS_VIA_CHARACTERS
2837 /* If possible, send signals to the entire pgrp
2838 by sending an input character to it. */
2840 /* TERMIOS is the latest and bestest, and seems most likely to
2841 work. If the system has it, use it. */
2848 tcgetattr (XINT (p
->infd
), &t
);
2849 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2853 tcgetattr (XINT (p
->infd
), &t
);
2854 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2858 tcgetattr (XINT (p
->infd
), &t
);
2859 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
2860 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2862 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
2867 #else /* ! HAVE_TERMIOS */
2869 /* On Berkeley descendants, the following IOCTL's retrieve the
2870 current control characters. */
2871 #if defined (TIOCGLTC) && defined (TIOCGETC)
2879 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2880 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
2883 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2884 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
2888 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
2889 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
2891 #endif /* ! defined (SIGTSTP) */
2894 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2896 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
2903 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2904 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2907 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2908 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2912 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2913 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2915 #endif /* ! defined (SIGTSTP) */
2917 #else /* ! defined (TCGETA) */
2918 Your configuration files are messed up
.
2919 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
2920 you'd better be using one of the alternatives above! */
2921 #endif /* ! defined (TCGETA) */
2922 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2923 #endif /* ! defined HAVE_TERMIOS */
2924 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
2927 /* Get the pgrp using the tty itself, if we have that.
2928 Otherwise, use the pty to get the pgrp.
2929 On pfa systems, saka@pfu.fujitsu.co.JP writes:
2930 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
2931 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
2932 His patch indicates that if TIOCGPGRP returns an error, then
2933 we should just assume that p->pid is also the process group id. */
2937 if (!NILP (p
->subtty
))
2938 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
2940 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
2944 gid
= - XFASTINT (p
->pid
);
2945 #endif /* ! defined (pfa) */
2951 #else /* ! defined (TIOCGPGRP ) */
2952 /* Can't select pgrps on this system, so we know that
2953 the child itself heads the pgrp. */
2954 gid
= - XFASTINT (p
->pid
);
2955 #endif /* ! defined (TIOCGPGRP ) */
2958 gid
= - XFASTINT (p
->pid
);
2964 p
->raw_status_low
= Qnil
;
2965 p
->raw_status_high
= Qnil
;
2967 XSETINT (p
->tick
, ++process_tick
);
2971 #endif /* ! defined (SIGCONT) */
2974 send_process (proc
, "\003", 1, Qnil
); /* ^C */
2979 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
2984 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
2987 flush_pending_output (XINT (p
->infd
));
2991 /* If we don't have process groups, send the signal to the immediate
2992 subprocess. That isn't really right, but it's better than any
2993 obvious alternative. */
2996 kill (XFASTINT (p
->pid
), signo
);
3000 /* gid may be a pid, or minus a pgrp's number */
3002 if (!NILP (current_group
))
3003 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
3006 gid
= - XFASTINT (p
->pid
);
3009 #else /* ! defined (TIOCSIGSEND) */
3010 EMACS_KILLPG (-gid
, signo
);
3011 #endif /* ! defined (TIOCSIGSEND) */
3014 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
3015 "Interrupt process PROCESS. May be process or name of one.\n\
3016 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
3017 nil or no arg means current buffer's process.\n\
3018 Second arg CURRENT-GROUP non-nil means send signal to\n\
3019 the current process-group of the process's controlling terminal\n\
3020 rather than to the process's own process group.\n\
3021 If the process is a shell, this means interrupt current subjob\n\
3022 rather than the shell.")
3023 (process
, current_group
)
3024 Lisp_Object process
, current_group
;
3026 process_send_signal (process
, SIGINT
, current_group
, 0);
3030 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
3031 "Kill process PROCESS. May be process or name of one.\n\
3032 See function `interrupt-process' for more details on usage.")
3033 (process
, current_group
)
3034 Lisp_Object process
, current_group
;
3036 process_send_signal (process
, SIGKILL
, current_group
, 0);
3040 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
3041 "Send QUIT signal to process PROCESS. May be process or name of one.\n\
3042 See function `interrupt-process' for more details on usage.")
3043 (process
, current_group
)
3044 Lisp_Object process
, current_group
;
3046 process_send_signal (process
, SIGQUIT
, current_group
, 0);
3050 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
3051 "Stop process PROCESS. May be process or name of one.\n\
3052 See function `interrupt-process' for more details on usage.")
3053 (process
, current_group
)
3054 Lisp_Object process
, current_group
;
3057 error ("no SIGTSTP support");
3059 process_send_signal (process
, SIGTSTP
, current_group
, 0);
3064 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
3065 "Continue process PROCESS. May be process or name of one.\n\
3066 See function `interrupt-process' for more details on usage.")
3067 (process
, current_group
)
3068 Lisp_Object process
, current_group
;
3071 process_send_signal (process
, SIGCONT
, current_group
, 0);
3073 error ("no SIGCONT support");
3078 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
3079 2, 2, "nProcess number: \nnSignal code: ",
3080 "Send the process with process id PID the signal with code SIGCODE.\n\
3081 PID must be an integer. The process need not be a child of this Emacs.\n\
3082 SIGCODE may be an integer, or a symbol whose name is a signal name.")
3084 Lisp_Object pid
, sigcode
;
3086 CHECK_NUMBER (pid
, 0);
3088 #define handle_signal(NAME, VALUE) \
3089 else if (!strcmp (name, NAME)) \
3090 XSETINT (sigcode, VALUE)
3092 if (INTEGERP (sigcode
))
3096 unsigned char *name
;
3098 CHECK_SYMBOL (sigcode
, 1);
3099 name
= XSYMBOL (sigcode
)->name
->data
;
3104 handle_signal ("SIGHUP", SIGHUP
);
3107 handle_signal ("SIGINT", SIGINT
);
3110 handle_signal ("SIGQUIT", SIGQUIT
);
3113 handle_signal ("SIGILL", SIGILL
);
3116 handle_signal ("SIGABRT", SIGABRT
);
3119 handle_signal ("SIGEMT", SIGEMT
);
3122 handle_signal ("SIGKILL", SIGKILL
);
3125 handle_signal ("SIGFPE", SIGFPE
);
3128 handle_signal ("SIGBUS", SIGBUS
);
3131 handle_signal ("SIGSEGV", SIGSEGV
);
3134 handle_signal ("SIGSYS", SIGSYS
);
3137 handle_signal ("SIGPIPE", SIGPIPE
);
3140 handle_signal ("SIGALRM", SIGALRM
);
3143 handle_signal ("SIGTERM", SIGTERM
);
3146 handle_signal ("SIGURG", SIGURG
);
3149 handle_signal ("SIGSTOP", SIGSTOP
);
3152 handle_signal ("SIGTSTP", SIGTSTP
);
3155 handle_signal ("SIGCONT", SIGCONT
);
3158 handle_signal ("SIGCHLD", SIGCHLD
);
3161 handle_signal ("SIGTTIN", SIGTTIN
);
3164 handle_signal ("SIGTTOU", SIGTTOU
);
3167 handle_signal ("SIGIO", SIGIO
);
3170 handle_signal ("SIGXCPU", SIGXCPU
);
3173 handle_signal ("SIGXFSZ", SIGXFSZ
);
3176 handle_signal ("SIGVTALRM", SIGVTALRM
);
3179 handle_signal ("SIGPROF", SIGPROF
);
3182 handle_signal ("SIGWINCH", SIGWINCH
);
3185 handle_signal ("SIGINFO", SIGINFO
);
3188 handle_signal ("SIGUSR1", SIGUSR1
);
3191 handle_signal ("SIGUSR2", SIGUSR2
);
3194 error ("Undefined signal name %s", name
);
3197 #undef handle_signal
3200 /* Only works for kill-type signals */
3201 return make_number (win32_kill_process (XINT (pid
), XINT (sigcode
)));
3203 return make_number (kill (XINT (pid
), XINT (sigcode
)));
3207 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
3208 "Make PROCESS see end-of-file in its input.\n\
3209 Eof comes after any text already sent to it.\n\
3210 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3211 nil, indicating the current buffer's process.\n\
3212 If PROCESS is a network connection, or is a process communicating\n\
3213 through a pipe (as opposed to a pty), then you cannot send any more\n\
3214 text to PROCESS after you call this function.")
3216 Lisp_Object process
;
3220 proc
= get_process (process
);
3222 /* Make sure the process is really alive. */
3223 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3224 update_status (XPROCESS (proc
));
3225 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3226 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
3229 send_process (proc
, "\032", 1, Qnil
); /* ^z */
3231 if (!NILP (XPROCESS (proc
)->pty_flag
))
3232 send_process (proc
, "\004", 1, Qnil
);
3235 close (XINT (XPROCESS (proc
)->outfd
));
3236 XSETINT (XPROCESS (proc
)->outfd
, open (NULL_DEVICE
, O_WRONLY
));
3242 /* Kill all processes associated with `buffer'.
3243 If `buffer' is nil, kill all processes */
3245 kill_buffer_processes (buffer
)
3248 Lisp_Object tail
, proc
;
3250 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3252 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3253 if (GC_PROCESSP (proc
)
3254 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
3256 if (NETCONN_P (proc
))
3257 Fdelete_process (proc
);
3258 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
3259 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
3264 /* On receipt of a signal that a child status has changed,
3265 loop asking about children with changed statuses until
3266 the system says there are no more.
3267 All we do is change the status;
3268 we do not run sentinels or print notifications.
3269 That is saved for the next time keyboard input is done,
3270 in order to avoid timing errors. */
3272 /** WARNING: this can be called during garbage collection.
3273 Therefore, it must not be fooled by the presence of mark bits in
3276 /** USG WARNING: Although it is not obvious from the documentation
3277 in signal(2), on a USG system the SIGCLD handler MUST NOT call
3278 signal() before executing at least one wait(), otherwise the handler
3279 will be called again, resulting in an infinite loop. The relevant
3280 portion of the documentation reads "SIGCLD signals will be queued
3281 and the signal-catching function will be continually reentered until
3282 the queue is empty". Invoking signal() causes the kernel to reexamine
3283 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
3286 sigchld_handler (signo
)
3289 int old_errno
= errno
;
3291 register struct Lisp_Process
*p
;
3292 extern EMACS_TIME
*input_available_clear_time
;
3296 sigheld
|= sigbit (SIGCHLD
);
3308 #endif /* no WUNTRACED */
3309 /* Keep trying to get a status until we get a definitive result. */
3313 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
3315 while (pid
<= 0 && errno
== EINTR
);
3319 /* A real failure. We have done all our job, so return. */
3321 /* USG systems forget handlers when they are used;
3322 must reestablish each time */
3324 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
3327 sigheld
&= ~sigbit (SIGCHLD
);
3335 #endif /* no WNOHANG */
3337 /* Find the process that signaled us, and record its status. */
3340 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3342 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3343 p
= XPROCESS (proc
);
3344 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
3349 /* Look for an asynchronous process whose pid hasn't been filled
3352 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3354 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3355 p
= XPROCESS (proc
);
3356 if (INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
3361 /* Change the status of the process that was found. */
3364 union { int i
; WAITTYPE wt
; } u
;
3365 int clear_desc_flag
= 0;
3367 XSETINT (p
->tick
, ++process_tick
);
3369 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
3370 XSETINT (p
->raw_status_high
, u
.i
>> 16);
3372 /* If process has terminated, stop waiting for its output. */
3373 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
3374 && XINT (p
->infd
) >= 0)
3375 clear_desc_flag
= 1;
3377 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
3378 if (clear_desc_flag
)
3380 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
3381 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
3384 /* Tell wait_reading_process_input that it needs to wake up and
3386 if (input_available_clear_time
)
3387 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3390 /* There was no asynchronous process found for that id. Check
3391 if we have a synchronous process. */
3394 synch_process_alive
= 0;
3396 /* Report the status of the synchronous process. */
3398 synch_process_retcode
= WRETCODE (w
);
3399 else if (WIFSIGNALED (w
))
3401 int code
= WTERMSIG (w
);
3407 /* Suppress warning if the table has const char *. */
3408 signame
= (char *) sys_siglist
[code
];
3410 signame
= sys_errlist
[code
];
3414 signame
= "unknown";
3416 synch_process_death
= signame
;
3419 /* Tell wait_reading_process_input that it needs to wake up and
3421 if (input_available_clear_time
)
3422 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3425 /* On some systems, we must return right away.
3426 If any more processes want to signal us, we will
3428 Otherwise (on systems that have WNOHANG), loop around
3429 to use up all the processes that have something to tell us. */
3430 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT)
3432 signal (signo
, sigchld_handler
);
3436 #endif /* USG, but not HPUX with WNOHANG */
3442 exec_sentinel_unwind (data
)
3445 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
3450 exec_sentinel_error_handler (error
)
3453 cmd_error_internal (error
, "error in process sentinel: ");
3455 update_echo_area ();
3456 Fsleep_for (make_number (2), Qnil
);
3460 exec_sentinel (proc
, reason
)
3461 Lisp_Object proc
, reason
;
3463 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
3464 register struct Lisp_Process
*p
= XPROCESS (proc
);
3465 int count
= specpdl_ptr
- specpdl
;
3467 /* No need to gcpro these, because all we do with them later
3468 is test them for EQness, and none of them should be a string. */
3469 odeactivate
= Vdeactivate_mark
;
3470 XSETBUFFER (obuffer
, current_buffer
);
3471 okeymap
= current_buffer
->keymap
;
3473 sentinel
= p
->sentinel
;
3474 if (NILP (sentinel
))
3477 /* Zilch the sentinel while it's running, to avoid recursive invocations;
3478 assure that it gets restored no matter how the sentinel exits. */
3480 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
3481 /* Inhibit quit so that random quits don't screw up a running filter. */
3482 specbind (Qinhibit_quit
, Qt
);
3483 specbind (Qlast_nonmenu_event
, Qt
);
3485 running_asynch_code
= 1;
3486 internal_condition_case_1 (read_process_output_call
,
3488 Fcons (proc
, Fcons (reason
, Qnil
))),
3489 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
3490 exec_sentinel_error_handler
);
3491 running_asynch_code
= 0;
3492 restore_match_data ();
3494 Vdeactivate_mark
= odeactivate
;
3496 if (! EQ (Fcurrent_buffer (), obuffer
)
3497 || ! EQ (current_buffer
->keymap
, okeymap
))
3499 /* But do it only if the caller is actually going to read events.
3500 Otherwise there's no need to make him wake up, and it could
3501 cause trouble (for example it would make Fsit_for return). */
3502 if (waiting_for_user_input_p
== -1)
3503 record_asynch_buffer_change ();
3505 unbind_to (count
, Qnil
);
3508 /* Report all recent events of a change in process status
3509 (either run the sentinel or output a message).
3510 This is done while Emacs is waiting for keyboard input. */
3514 register Lisp_Object proc
, buffer
;
3515 Lisp_Object tail
, msg
;
3516 struct gcpro gcpro1
, gcpro2
;
3520 /* We need to gcpro tail; if read_process_output calls a filter
3521 which deletes a process and removes the cons to which tail points
3522 from Vprocess_alist, and then causes a GC, tail is an unprotected
3526 /* Set this now, so that if new processes are created by sentinels
3527 that we run, we get called again to handle their status changes. */
3528 update_tick
= process_tick
;
3530 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
3533 register struct Lisp_Process
*p
;
3535 proc
= Fcdr (Fcar (tail
));
3536 p
= XPROCESS (proc
);
3538 if (XINT (p
->tick
) != XINT (p
->update_tick
))
3540 XSETINT (p
->update_tick
, XINT (p
->tick
));
3542 /* If process is still active, read any output that remains. */
3543 if (XINT (p
->infd
) >= 0)
3544 while (! EQ (p
->filter
, Qt
)
3545 && read_process_output (proc
, XINT (p
->infd
)) > 0);
3549 /* Get the text to use for the message. */
3550 if (!NILP (p
->raw_status_low
))
3552 msg
= status_message (p
->status
);
3554 /* If process is terminated, deactivate it or delete it. */
3556 if (CONSP (p
->status
))
3557 symbol
= XCONS (p
->status
)->car
;
3559 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
3560 || EQ (symbol
, Qclosed
))
3562 if (delete_exited_processes
)
3563 remove_process (proc
);
3565 deactivate_process (proc
);
3568 /* Now output the message suitably. */
3569 if (!NILP (p
->sentinel
))
3570 exec_sentinel (proc
, msg
);
3571 /* Don't bother with a message in the buffer
3572 when a process becomes runnable. */
3573 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
3575 Lisp_Object ro
, tem
;
3576 struct buffer
*old
= current_buffer
;
3579 ro
= XBUFFER (buffer
)->read_only
;
3581 /* Avoid error if buffer is deleted
3582 (probably that's why the process is dead, too) */
3583 if (NILP (XBUFFER (buffer
)->name
))
3585 Fset_buffer (buffer
);
3587 /* Insert new output into buffer
3588 at the current end-of-output marker,
3589 thus preserving logical ordering of input and output. */
3590 if (XMARKER (p
->mark
)->buffer
)
3591 SET_PT (marker_position (p
->mark
));
3594 if (point
<= opoint
)
3595 opoint
+= XSTRING (msg
)->size
+ XSTRING (p
->name
)->size
+ 10;
3597 tem
= current_buffer
->read_only
;
3598 current_buffer
->read_only
= Qnil
;
3599 insert_string ("\nProcess ");
3600 Finsert (1, &p
->name
);
3601 insert_string (" ");
3603 current_buffer
->read_only
= tem
;
3604 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
3607 set_buffer_internal (old
);
3612 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
3613 redisplay_preserve_echo_area ();
3618 /* The first time this is called, assume keyboard input comes from DESC
3619 instead of from where we used to expect it.
3620 Subsequent calls mean assume input keyboard can come from DESC
3621 in addition to other places. */
3623 static int add_keyboard_wait_descriptor_called_flag
;
3626 add_keyboard_wait_descriptor (desc
)
3629 if (! add_keyboard_wait_descriptor_called_flag
)
3630 FD_CLR (0, &input_wait_mask
);
3631 add_keyboard_wait_descriptor_called_flag
= 1;
3632 FD_SET (desc
, &input_wait_mask
);
3633 if (desc
> max_keyboard_desc
)
3634 max_keyboard_desc
= desc
;
3637 /* From now on, do not expect DESC to give keyboard input. */
3640 delete_keyboard_wait_descriptor (desc
)
3644 int lim
= max_keyboard_desc
;
3646 FD_CLR (desc
, &input_wait_mask
);
3648 if (desc
== max_keyboard_desc
)
3649 for (fd
= 0; fd
< lim
; fd
++)
3650 if (FD_ISSET (fd
, &input_wait_mask
)
3651 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3652 max_keyboard_desc
= fd
;
3655 /* Return nonzero if *MASK has a bit set
3656 that corresponds to one of the keyboard input descriptors. */
3659 keyboard_bit_set (mask
)
3664 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
3665 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
3666 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3678 if (! noninteractive
|| initialized
)
3680 signal (SIGCHLD
, sigchld_handler
);
3683 FD_ZERO (&input_wait_mask
);
3684 FD_ZERO (&non_keyboard_wait_mask
);
3685 max_process_desc
= 0;
3687 FD_SET (0, &input_wait_mask
);
3689 Vprocess_alist
= Qnil
;
3690 for (i
= 0; i
< MAXDESC
; i
++)
3692 chan_process
[i
] = Qnil
;
3693 proc_buffered_char
[i
] = -1;
3700 stream_process
= intern ("stream");
3702 Qprocessp
= intern ("processp");
3703 staticpro (&Qprocessp
);
3704 Qrun
= intern ("run");
3706 Qstop
= intern ("stop");
3708 Qsignal
= intern ("signal");
3709 staticpro (&Qsignal
);
3711 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
3714 Qexit = intern ("exit");
3715 staticpro (&Qexit); */
3717 Qopen
= intern ("open");
3719 Qclosed
= intern ("closed");
3720 staticpro (&Qclosed
);
3722 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
3723 staticpro (&Qlast_nonmenu_event
);
3725 staticpro (&Vprocess_alist
);
3727 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
3728 "*Non-nil means delete processes immediately when they exit.\n\
3729 nil means don't delete them until `list-processes' is run.");
3731 delete_exited_processes
= 1;
3733 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
3734 "Control type of device used to communicate with subprocesses.\n\
3735 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
3736 The value has no effect if the system has no ptys or if all ptys are busy:\n\
3737 then a pipe is used in any case.\n\
3738 The value takes effect when `start-process' is called.");
3739 Vprocess_connection_type
= Qt
;
3741 defsubr (&Sprocessp
);
3742 defsubr (&Sget_process
);
3743 defsubr (&Sget_buffer_process
);
3744 defsubr (&Sdelete_process
);
3745 defsubr (&Sprocess_status
);
3746 defsubr (&Sprocess_exit_status
);
3747 defsubr (&Sprocess_id
);
3748 defsubr (&Sprocess_name
);
3749 defsubr (&Sprocess_tty_name
);
3750 defsubr (&Sprocess_command
);
3751 defsubr (&Sset_process_buffer
);
3752 defsubr (&Sprocess_buffer
);
3753 defsubr (&Sprocess_mark
);
3754 defsubr (&Sset_process_filter
);
3755 defsubr (&Sprocess_filter
);
3756 defsubr (&Sset_process_sentinel
);
3757 defsubr (&Sset_process_window_size
);
3758 defsubr (&Sprocess_sentinel
);
3759 defsubr (&Sprocess_kill_without_query
);
3760 defsubr (&Slist_processes
);
3761 defsubr (&Sprocess_list
);
3762 defsubr (&Sstart_process
);
3764 defsubr (&Sopen_network_stream
);
3765 #endif /* HAVE_SOCKETS */
3766 defsubr (&Saccept_process_output
);
3767 defsubr (&Sprocess_send_region
);
3768 defsubr (&Sprocess_send_string
);
3769 defsubr (&Sinterrupt_process
);
3770 defsubr (&Skill_process
);
3771 defsubr (&Squit_process
);
3772 defsubr (&Sstop_process
);
3773 defsubr (&Scontinue_process
);
3774 defsubr (&Sprocess_send_eof
);
3775 defsubr (&Ssignal_process
);
3776 defsubr (&Swaiting_for_user_input_p
);
3777 /* defsubr (&Sprocess_connection); */
3781 #else /* not subprocesses */
3783 #include <sys/types.h>
3787 #include "systime.h"
3788 #include "termopts.h"
3789 #include "sysselect.h"
3791 extern int frame_garbaged
;
3794 /* As described above, except assuming that there are no subprocesses:
3796 Wait for timeout to elapse and/or keyboard input to be available.
3799 timeout in seconds, or
3800 zero for no limit, or
3801 -1 means gobble data immediately available but don't wait for any.
3803 read_kbd is a Lisp_Object:
3804 0 to ignore keyboard input, or
3805 1 to return when input is available, or
3806 -1 means caller will actually read the input, so don't throw to
3808 We know that read_kbd will never be a Lisp_Process, since
3809 `subprocesses' isn't defined.
3811 do_display != 0 means redisplay should be done to show subprocess
3812 output that arrives.
3814 Return true iff we received input from any process. */
3817 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
3818 int time_limit
, microsecs
;
3819 Lisp_Object read_kbd
;
3822 EMACS_TIME end_time
, timeout
, *timeout_p
;
3823 SELECT_TYPE waitchannels
;
3825 /* What does time_limit really mean? */
3826 if (time_limit
|| microsecs
)
3828 /* It's not infinite. */
3829 timeout_p
= &timeout
;
3831 if (time_limit
== -1)
3832 /* In fact, it's zero. */
3833 EMACS_SET_SECS_USECS (timeout
, 0, 0);
3835 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
3837 /* How far in the future is that? */
3838 EMACS_GET_TIME (end_time
);
3839 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
3842 /* It's infinite. */
3845 /* Turn off periodic alarms (in case they are in use)
3846 because the select emulator uses alarms. */
3853 if (XINT (read_kbd
))
3854 FD_SET (0, &waitchannels
);
3856 FD_ZERO (&waitchannels
);
3858 /* If calling from keyboard input, do not quit
3859 since we want to return C-g as an input character.
3860 Otherwise, do pending quit if requested. */
3861 if (XINT (read_kbd
) >= 0)
3866 EMACS_GET_TIME (*timeout_p
);
3867 EMACS_SUB_TIME (*timeout_p
, end_time
, *timeout_p
);
3868 if (EMACS_TIME_NEG_P (*timeout_p
))
3872 /* Cause C-g and alarm signals to take immediate action,
3873 and cause input available signals to zero out timeout. */
3874 if (XINT (read_kbd
) < 0)
3875 set_waiting_for_input (&timeout
);
3877 /* If a frame has been newly mapped and needs updating,
3878 reprocess its display stuff. */
3879 if (frame_garbaged
&& do_display
)
3880 redisplay_preserve_echo_area ();
3882 if (XINT (read_kbd
) && detect_input_pending ())
3885 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
3888 /* Make C-g and alarm signals set flags again */
3889 clear_waiting_for_input ();
3891 /* If we woke up due to SIGWINCH, actually change size now. */
3892 do_pending_window_change ();
3896 /* If the system call was interrupted, then go around the
3899 FD_ZERO (&waitchannels
);
3902 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
3903 /* System sometimes fails to deliver SIGIO. */
3904 kill (getpid (), SIGIO
);
3907 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
3908 kill (getpid (), SIGIO
);
3911 /* If we have timed out (nfds == 0) or found some input (nfds > 0),
3923 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
3924 /* Don't confuse make-docfile by having two doc strings for this function.
3925 make-docfile does not pay attention to #if, for good reason! */
3928 register Lisp_Object name
;
3933 /* Kill all processes associated with `buffer'.
3934 If `buffer' is nil, kill all processes.
3935 Since we have no subprocesses, this does nothing. */
3937 kill_buffer_processes (buffer
)
3948 defsubr (&Sget_buffer_process
);
3952 #endif /* not subprocesses */