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 cons cell (HOSTNAME PORTNUM). */
116 static Lisp_Object stream_process
;
118 #define NETCONN_P(p) (GC_CONSP (XPROCESS (p)->childp))
120 #define NETCONN_P(p) 0
121 #endif /* HAVE_SOCKETS */
123 /* Define first descriptor number available for subprocesses. */
125 #define FIRST_PROC_DESC 1
127 #define FIRST_PROC_DESC 3
130 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
133 #if !defined (SIGCHLD) && defined (SIGCLD)
134 #define SIGCHLD SIGCLD
137 #include "syssignal.h"
142 extern char *strerror ();
144 extern char *sys_errlist
[];
151 #ifndef SYS_SIGLIST_DECLARED
156 extern char *sys_siglist
[];
157 #endif /* not LINUX */
159 char *sys_siglist
[] =
165 "illegal instruction",
169 "floating point exception",
172 "segmentation violation",
173 "bad argument to system call",
174 "write on a pipe with no one to read it",
176 "software termination signal from kill",
178 "sendable stop signal not from tty",
179 "stop signal from tty",
180 "continue a stopped process",
181 "child status has changed",
182 "background read attempted from control tty",
183 "background write attempted from control tty",
184 "input record available at control tty",
185 "exceeded CPU time limit",
186 "exceeded file size limit"
188 #endif /* not WINDOWSNT */
191 #endif /* ! SYS_SIGLIST_DECLARED */
193 /* t means use pty, nil means use a pipe,
194 maybe other values to come. */
195 static Lisp_Object Vprocess_connection_type
;
199 #include <sys/socket.h>
203 /* These next two vars are non-static since sysdep.c uses them in the
204 emulation of `select'. */
205 /* Number of events of change of status of a process. */
207 /* Number of events for which the user or sentinel has been notified. */
210 #include "sysselect.h"
212 /* If we support a window system, turn on the code to poll periodically
213 to detect C-g. It isn't actually used when doing interrupt input. */
214 #ifdef HAVE_WINDOW_SYSTEM
215 #define POLL_FOR_INPUT
218 /* Mask of bits indicating the descriptors that we wait for input on. */
220 static SELECT_TYPE input_wait_mask
;
222 /* Mask that excludes keyboard input descriptor (s). */
224 static SELECT_TYPE non_keyboard_wait_mask
;
226 /* The largest descriptor currently in use for a process object. */
227 static int max_process_desc
;
229 /* The largest descriptor currently in use for keyboard input. */
230 static int max_keyboard_desc
;
232 /* Nonzero means delete a process right away if it exits. */
233 static int delete_exited_processes
;
235 /* Indexed by descriptor, gives the process (if any) for that descriptor */
236 Lisp_Object chan_process
[MAXDESC
];
238 /* Alist of elements (NAME . PROCESS) */
239 Lisp_Object Vprocess_alist
;
241 /* Buffered-ahead input char from process, indexed by channel.
242 -1 means empty (no char is buffered).
243 Used on sys V where the only way to tell if there is any
244 output from the process is to read at least one char.
245 Always -1 on systems that support FIONREAD. */
247 /* Don't make static; need to access externally. */
248 int proc_buffered_char
[MAXDESC
];
250 static Lisp_Object
get_process ();
252 extern EMACS_TIME
timer_check ();
253 extern int timers_run
;
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 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
852 "Return the contact info of PROCESS; t for a real child.\n\
853 For a net connection, the value is a cons cell of the form (HOST SERVICE).")
855 register Lisp_Object process
;
857 CHECK_PROCESS (process
, 0);
858 return XPROCESS (process
)->childp
;
861 #if 0 /* Turned off because we don't currently record this info
862 in the process. Perhaps add it. */
863 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
864 "Return the connection type of `PROCESS'.\n\
865 The value is `nil' for a pipe,\n\
866 `t' or `pty' for a pty, or `stream' for a socket connection.")
870 return XPROCESS (process
)->type
;
877 register Lisp_Object tail
, tem
;
878 Lisp_Object proc
, minspace
, tem1
;
879 register struct buffer
*old
= current_buffer
;
880 register struct Lisp_Process
*p
;
884 XSETFASTINT (minspace
, 1);
886 set_buffer_internal (XBUFFER (Vstandard_output
));
887 Fbuffer_disable_undo (Vstandard_output
);
889 current_buffer
->truncate_lines
= Qt
;
892 Proc Status Buffer Tty Command\n\
893 ---- ------ ------ --- -------\n", -1);
895 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
899 proc
= Fcdr (Fcar (tail
));
901 if (NILP (p
->childp
))
904 Finsert (1, &p
->name
);
905 Findent_to (make_number (13), minspace
);
907 if (!NILP (p
->raw_status_low
))
910 if (CONSP (p
->status
))
911 symbol
= XCONS (p
->status
)->car
;
914 if (EQ (symbol
, Qsignal
))
917 tem
= Fcar (Fcdr (p
->status
));
919 if (XINT (tem
) < NSIG
)
920 write_string (sys_errlist
[XINT (tem
)], -1);
923 Fprinc (symbol
, Qnil
);
925 else if (NETCONN_P (proc
))
927 if (EQ (symbol
, Qrun
))
928 write_string ("open", -1);
929 else if (EQ (symbol
, Qexit
))
930 write_string ("closed", -1);
932 Fprinc (symbol
, Qnil
);
935 Fprinc (symbol
, Qnil
);
937 if (EQ (symbol
, Qexit
))
940 tem
= Fcar (Fcdr (p
->status
));
943 sprintf (tembuf
, " %d", (int) XFASTINT (tem
));
944 write_string (tembuf
, -1);
948 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
949 remove_process (proc
);
951 Findent_to (make_number (22), minspace
);
952 if (NILP (p
->buffer
))
953 insert_string ("(none)");
954 else if (NILP (XBUFFER (p
->buffer
)->name
))
955 insert_string ("(Killed)");
957 Finsert (1, &XBUFFER (p
->buffer
)->name
);
959 Findent_to (make_number (37), minspace
);
961 if (STRINGP (p
->tty_name
))
962 Finsert (1, &p
->tty_name
);
964 insert_string ("(none)");
966 Findent_to (make_number (49), minspace
);
968 if (NETCONN_P (proc
))
970 sprintf (tembuf
, "(network stream connection to %s)\n",
971 XSTRING (XCONS (p
->childp
)->car
)->data
);
972 insert_string (tembuf
);
986 insert_string ("\n");
992 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 0, "",
993 "Display a list of all processes.\n\
994 \(Any processes listed as Exited or Signaled are actually eliminated\n\
995 after the listing is made.)")
998 internal_with_output_to_temp_buffer ("*Process List*",
999 list_processes_1
, Qnil
);
1003 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1004 "Return a list of all processes.")
1007 return Fmapcar (Qcdr
, Vprocess_alist
);
1010 /* Starting asynchronous inferior processes. */
1012 static Lisp_Object
start_process_unwind ();
1014 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1015 "Start a program in a subprocess. Return the process object for it.\n\
1016 Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\
1017 NAME is name for process. It is modified if necessary to make it unique.\n\
1018 BUFFER is the buffer or (buffer-name) to associate with the process.\n\
1019 Process output goes at end of that buffer, unless you specify\n\
1020 an output stream or filter function to handle the output.\n\
1021 BUFFER may be also nil, meaning that this process is not associated\n\
1023 Third arg is program file name. It is searched for as in the shell.\n\
1024 Remaining arguments are strings to give program as arguments.")
1027 register Lisp_Object
*args
;
1029 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1031 register unsigned char *new_argv
;
1034 register unsigned char **new_argv
;
1037 int count
= specpdl_ptr
- specpdl
;
1041 buffer
= Fget_buffer_create (buffer
);
1043 /* Make sure that the child will be able to chdir to the current
1044 buffer's current directory, or its unhandled equivalent. We
1045 can't just have the child check for an error when it does the
1046 chdir, since it's in a vfork.
1048 We have to GCPRO around this because Fexpand_file_name and
1049 Funhandled_file_name_directory might call a file name handling
1050 function. The argument list is protected by the caller, so all
1051 we really have to worry about is buffer. */
1053 struct gcpro gcpro1
, gcpro2
;
1055 current_dir
= current_buffer
->directory
;
1057 GCPRO2 (buffer
, current_dir
);
1060 = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir
),
1062 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1063 report_file_error ("Setting current directory",
1064 Fcons (current_buffer
->directory
, Qnil
));
1070 CHECK_STRING (name
, 0);
1074 CHECK_STRING (program
, 2);
1077 /* Make a one member argv with all args concatenated
1078 together separated by a blank. */
1079 len
= XSTRING (program
)->size
+ 2;
1080 for (i
= 3; i
< nargs
; i
++)
1083 CHECK_STRING (tem
, i
);
1084 len
+= XSTRING (tem
)->size
+ 1; /* count the blank */
1086 new_argv
= (unsigned char *) alloca (len
);
1087 strcpy (new_argv
, XSTRING (program
)->data
);
1088 for (i
= 3; i
< nargs
; i
++)
1091 CHECK_STRING (tem
, i
);
1092 strcat (new_argv
, " ");
1093 strcat (new_argv
, XSTRING (tem
)->data
);
1095 /* Need to add code here to check for program existence on VMS */
1098 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1100 /* If program file name is not absolute, search our path for it */
1101 if (!IS_DIRECTORY_SEP (XSTRING (program
)->data
[0])
1102 && !(XSTRING (program
)->size
> 1
1103 && IS_DEVICE_SEP (XSTRING (program
)->data
[1])))
1105 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1108 GCPRO4 (name
, program
, buffer
, current_dir
);
1109 openp (Vexec_path
, program
, EXEC_SUFFIXES
, &tem
, 1);
1112 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1113 tem
= Fexpand_file_name (tem
, Qnil
);
1114 new_argv
[0] = XSTRING (tem
)->data
;
1118 if (!NILP (Ffile_directory_p (program
)))
1119 error ("Specified program for new process is a directory");
1121 new_argv
[0] = XSTRING (program
)->data
;
1124 for (i
= 3; i
< nargs
; i
++)
1127 CHECK_STRING (tem
, i
);
1128 new_argv
[i
- 2] = XSTRING (tem
)->data
;
1130 new_argv
[i
- 2] = 0;
1131 #endif /* not VMS */
1133 proc
= make_process (name
);
1134 /* If an error occurs and we can't start the process, we want to
1135 remove it from the process list. This means that each error
1136 check in create_process doesn't need to call remove_process
1137 itself; it's all taken care of here. */
1138 record_unwind_protect (start_process_unwind
, proc
);
1140 XPROCESS (proc
)->childp
= Qt
;
1141 XPROCESS (proc
)->command_channel_p
= Qnil
;
1142 XPROCESS (proc
)->buffer
= buffer
;
1143 XPROCESS (proc
)->sentinel
= Qnil
;
1144 XPROCESS (proc
)->filter
= Qnil
;
1145 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1147 /* Make the process marker point into the process buffer (if any). */
1149 Fset_marker (XPROCESS (proc
)->mark
,
1150 make_number (BUF_ZV (XBUFFER (buffer
))), buffer
);
1152 create_process (proc
, new_argv
, current_dir
);
1154 return unbind_to (count
, proc
);
1157 /* This function is the unwind_protect form for Fstart_process. If
1158 PROC doesn't have its pid set, then we know someone has signaled
1159 an error and the process wasn't started successfully, so we should
1160 remove it from the process list. */
1162 start_process_unwind (proc
)
1165 if (!PROCESSP (proc
))
1168 /* Was PROC started successfully? */
1169 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1170 remove_process (proc
);
1177 create_process_1 (signo
)
1181 /* USG systems forget handlers when they are used;
1182 must reestablish each time */
1183 signal (signo
, create_process_1
);
1187 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1190 /* Mimic blocking of signals on system V, which doesn't really have it. */
1192 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1193 int sigchld_deferred
;
1196 create_process_sigchld ()
1198 signal (SIGCHLD
, create_process_sigchld
);
1200 sigchld_deferred
= 1;
1206 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1207 create_process (process
, new_argv
, current_dir
)
1208 Lisp_Object process
;
1210 Lisp_Object current_dir
;
1212 int pid
, inchannel
, outchannel
;
1214 #ifdef POSIX_SIGNALS
1217 struct sigaction sigint_action
;
1218 struct sigaction sigquit_action
;
1220 struct sigaction sighup_action
;
1222 #else /* !POSIX_SIGNALS */
1224 SIGTYPE (*sigchld
)();
1226 #endif /* !POSIX_SIGNALS */
1227 /* Use volatile to protect variables from being clobbered by longjmp. */
1228 volatile int forkin
, forkout
;
1229 volatile int pty_flag
= 0;
1230 extern char **environ
;
1232 inchannel
= outchannel
= -1;
1235 if (!NILP (Vprocess_connection_type
))
1236 outchannel
= inchannel
= allocate_pty ();
1241 /* On USG systems it does not work to open the pty's tty here
1242 and then close and reopen it in the child. */
1244 /* Don't let this terminal become our controlling terminal
1245 (in case we don't have one). */
1246 forkout
= forkin
= open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1248 forkout
= forkin
= open (pty_name
, O_RDWR
, 0);
1251 report_file_error ("Opening pty", Qnil
);
1253 forkin
= forkout
= -1;
1254 #endif /* not USG */
1258 #endif /* HAVE_PTYS */
1261 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1262 report_file_error ("Opening socketpair", Qnil
);
1263 outchannel
= inchannel
= sv
[0];
1264 forkout
= forkin
= sv
[1];
1266 #else /* not SKTPAIR */
1275 #endif /* not SKTPAIR */
1278 /* Replaced by close_process_descs */
1279 set_exclusive_use (inchannel
);
1280 set_exclusive_use (outchannel
);
1283 /* Stride people say it's a mystery why this is needed
1284 as well as the O_NDELAY, but that it fails without this. */
1285 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1288 ioctl (inchannel
, FIONBIO
, &one
);
1293 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1294 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1297 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1298 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1302 /* Record this as an active process, with its channels.
1303 As a result, child_setup will close Emacs's side of the pipes. */
1304 chan_process
[inchannel
] = process
;
1305 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1306 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1307 /* Record the tty descriptor used in the subprocess. */
1309 XPROCESS (process
)->subtty
= Qnil
;
1311 XSETFASTINT (XPROCESS (process
)->subtty
, forkin
);
1312 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1313 XPROCESS (process
)->status
= Qrun
;
1315 /* Delay interrupts until we have a chance to store
1316 the new fork's pid in its process structure */
1317 #ifdef POSIX_SIGNALS
1318 sigemptyset (&blocked
);
1320 sigaddset (&blocked
, SIGCHLD
);
1323 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1324 this sets the parent's signal handlers as well as the child's.
1325 So delay all interrupts whose handlers the child might munge,
1326 and record the current handlers so they can be restored later. */
1327 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1328 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1330 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1332 #endif /* HAVE_VFORK */
1333 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1334 #else /* !POSIX_SIGNALS */
1338 #else /* not BSD4_1 */
1339 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1340 sigsetmask (sigmask (SIGCHLD
));
1341 #else /* ordinary USG */
1343 sigchld_deferred
= 0;
1344 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1346 #endif /* ordinary USG */
1347 #endif /* not BSD4_1 */
1348 #endif /* SIGCHLD */
1349 #endif /* !POSIX_SIGNALS */
1351 FD_SET (inchannel
, &input_wait_mask
);
1352 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1353 if (inchannel
> max_process_desc
)
1354 max_process_desc
= inchannel
;
1356 /* Until we store the proper pid, enable sigchld_handler
1357 to recognize an unknown pid as standing for this process.
1358 It is very important not to let this `marker' value stay
1359 in the table after this function has returned; if it does
1360 it might cause call-process to hang and subsequent asynchronous
1361 processes to get their return values scrambled. */
1362 XSETINT (XPROCESS (process
)->pid
, -1);
1365 /* child_setup must clobber environ on systems with true vfork.
1366 Protect it from permanent change. */
1367 char **save_environ
= environ
;
1372 #endif /* not WINDOWSNT */
1374 int xforkin
= forkin
;
1375 int xforkout
= forkout
;
1377 #if 0 /* This was probably a mistake--it duplicates code later on,
1378 but fails to handle all the cases. */
1379 /* Make sure SIGCHLD is not blocked in the child. */
1380 sigsetmask (SIGEMPTYMASK
);
1383 /* Make the pty be the controlling terminal of the process. */
1385 /* First, disconnect its current controlling terminal. */
1387 /* We tried doing setsid only if pty_flag, but it caused
1388 process_set_signal to fail on SGI when using a pipe. */
1390 /* Make the pty's terminal the controlling terminal. */
1394 /* We ignore the return value
1395 because faith@cs.unc.edu says that is necessary on Linux. */
1396 ioctl (xforkin
, TIOCSCTTY
, 0);
1399 #else /* not HAVE_SETSID */
1401 /* It's very important to call setpgrp here and no time
1402 afterwards. Otherwise, we lose our controlling tty which
1403 is set when we open the pty. */
1406 #endif /* not HAVE_SETSID */
1407 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1408 if (pty_flag
&& xforkin
>= 0)
1411 tcgetattr (xforkin
, &t
);
1413 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1414 write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1417 #if defined (NTTYDISC) && defined (TIOCSETD)
1418 if (pty_flag
&& xforkin
>= 0)
1420 /* Use new line discipline. */
1421 int ldisc
= NTTYDISC
;
1422 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1427 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1428 can do TIOCSPGRP only to the process's controlling tty. */
1431 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1432 I can't test it since I don't have 4.3. */
1433 int j
= open ("/dev/tty", O_RDWR
, 0);
1434 ioctl (j
, TIOCNOTTY
, 0);
1437 /* In order to get a controlling terminal on some versions
1438 of BSD, it is necessary to put the process in pgrp 0
1439 before it opens the terminal. */
1447 #endif /* TIOCNOTTY */
1449 #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY)
1450 /*** There is a suggestion that this ought to be a
1451 conditional on TIOCSPGRP,
1452 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1453 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1454 that system does seem to need this code, even though
1455 both HAVE_SETSID and TIOCSCTTY are defined. */
1456 /* Now close the pty (if we had it open) and reopen it.
1457 This makes the pty the controlling terminal of the subprocess. */
1460 #ifdef SET_CHILD_PTY_PGRP
1461 int pgrp
= getpid ();
1464 /* I wonder if close (open (pty_name, ...)) would work? */
1467 xforkout
= xforkin
= open (pty_name
, O_RDWR
, 0);
1471 write (1, "Couldn't open the pty terminal ", 31);
1472 write (1, pty_name
, strlen (pty_name
));
1477 #ifdef SET_CHILD_PTY_PGRP
1478 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1479 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1482 #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */
1484 #ifdef SETUP_SLAVE_PTY
1489 #endif /* SETUP_SLAVE_PTY */
1491 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1492 Now reenable it in the child, so it will die when we want it to. */
1494 signal (SIGHUP
, SIG_DFL
);
1496 #endif /* HAVE_PTYS */
1498 signal (SIGINT
, SIG_DFL
);
1499 signal (SIGQUIT
, SIG_DFL
);
1501 /* Stop blocking signals in the child. */
1502 #ifdef POSIX_SIGNALS
1503 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1504 #else /* !POSIX_SIGNALS */
1508 #else /* not BSD4_1 */
1509 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1510 sigsetmask (SIGEMPTYMASK
);
1511 #else /* ordinary USG */
1513 signal (SIGCHLD
, sigchld
);
1515 #endif /* ordinary USG */
1516 #endif /* not BSD4_1 */
1517 #endif /* SIGCHLD */
1518 #endif /* !POSIX_SIGNALS */
1521 child_setup_tty (xforkout
);
1523 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1524 new_argv
, 1, current_dir
);
1525 #else /* not WINDOWSNT */
1526 child_setup (xforkin
, xforkout
, xforkout
,
1527 new_argv
, 1, current_dir
);
1528 #endif /* not WINDOWSNT */
1530 environ
= save_environ
;
1533 /* This runs in the Emacs process. */
1538 if (forkin
!= forkout
&& forkout
>= 0)
1543 /* vfork succeeded. */
1544 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
1547 register_child (pid
, inchannel
);
1548 #endif /* WINDOWSNT */
1550 /* If the subfork execv fails, and it exits,
1551 this close hangs. I don't know why.
1552 So have an interrupt jar it loose. */
1554 signal (SIGALRM
, create_process_1
);
1556 XPROCESS (process
)->subtty
= Qnil
;
1561 if (forkin
!= forkout
&& forkout
>= 0)
1566 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1569 XPROCESS (process
)->tty_name
= Qnil
;
1572 /* Restore the signal state whether vfork succeeded or not.
1573 (We will signal an error, below, if it failed.) */
1574 #ifdef POSIX_SIGNALS
1576 /* Restore the parent's signal handlers. */
1577 sigaction (SIGINT
, &sigint_action
, 0);
1578 sigaction (SIGQUIT
, &sigquit_action
, 0);
1580 sigaction (SIGHUP
, &sighup_action
, 0);
1582 #endif /* HAVE_VFORK */
1583 /* Stop blocking signals in the parent. */
1584 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1585 #else /* !POSIX_SIGNALS */
1589 #else /* not BSD4_1 */
1590 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1591 sigsetmask (SIGEMPTYMASK
);
1592 #else /* ordinary USG */
1594 signal (SIGCHLD
, sigchld
);
1595 /* Now really handle any of these signals
1596 that came in during this function. */
1597 if (sigchld_deferred
)
1598 kill (getpid (), SIGCHLD
);
1600 #endif /* ordinary USG */
1601 #endif /* not BSD4_1 */
1602 #endif /* SIGCHLD */
1603 #endif /* !POSIX_SIGNALS */
1605 /* Now generate the error if vfork failed. */
1607 report_file_error ("Doing vfork", Qnil
);
1609 #endif /* not VMS */
1613 /* open a TCP network connection to a given HOST/SERVICE. Treated
1614 exactly like a normal process when reading and writing. Only
1615 differences are in status display and process deletion. A network
1616 connection has no PID; you cannot signal it. All you can do is
1617 deactivate and close it via delete-process */
1619 DEFUN ("open-network-stream", Fopen_network_stream
, Sopen_network_stream
,
1621 "Open a TCP connection for a service to a host.\n\
1622 Returns a subprocess-object to represent the connection.\n\
1623 Input and output work as for subprocesses; `delete-process' closes it.\n\
1624 Args are NAME BUFFER HOST SERVICE.\n\
1625 NAME is name for process. It is modified if necessary to make it unique.\n\
1626 BUFFER is the buffer (or buffer-name) to associate with the process.\n\
1627 Process output goes at end of that buffer, unless you specify\n\
1628 an output stream or filter function to handle the output.\n\
1629 BUFFER may be also nil, meaning that this process is not associated\n\
1631 Third arg is name of the host to connect to, or its IP address.\n\
1632 Fourth arg SERVICE is name of the service desired, or an integer\n\
1633 specifying a port number to connect to.")
1634 (name
, buffer
, host
, service
)
1635 Lisp_Object name
, buffer
, host
, service
;
1639 struct sockaddr_in address
;
1640 struct servent
*svc_info
;
1641 struct hostent
*host_info_ptr
, host_info
;
1642 char *(addr_list
[2]);
1643 IN_ADDR numeric_addr
;
1647 struct hostent host_info_fixed
;
1648 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1650 int count
= specpdl_ptr
- specpdl
;
1653 /* Ensure socket support is loaded if available. */
1654 init_winsock (TRUE
);
1657 GCPRO4 (name
, buffer
, host
, service
);
1658 CHECK_STRING (name
, 0);
1659 CHECK_STRING (host
, 0);
1660 if (INTEGERP (service
))
1661 port
= htons ((unsigned short) XINT (service
));
1664 CHECK_STRING (service
, 0);
1665 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
1667 error ("Unknown service \"%s\"", XSTRING (service
)->data
);
1668 port
= svc_info
->s_port
;
1671 /* Slow down polling to every ten seconds.
1672 Some kernels have a bug which causes retrying connect to fail
1673 after a connect. Polling can interfere with gethostbyname too. */
1674 #ifdef POLL_FOR_INPUT
1675 bind_polling_period (10);
1686 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
1689 if (! (host_info_ptr
== 0 && h_errno
== TRY_AGAIN
))
1692 Fsleep_for (make_number (1), Qnil
);
1694 if (host_info_ptr
== 0)
1695 /* Attempt to interpret host as numeric inet address */
1697 numeric_addr
= inet_addr ((char *) XSTRING (host
)->data
);
1698 if (NUMERIC_ADDR_ERROR
)
1699 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
1701 host_info_ptr
= &host_info
;
1702 host_info
.h_name
= 0;
1703 host_info
.h_aliases
= 0;
1704 host_info
.h_addrtype
= AF_INET
;
1706 /* Older machines have only one address slot called h_addr.
1707 Newer machines have h_addr_list, but #define h_addr to
1708 be its first element. */
1709 host_info
.h_addr_list
= &(addr_list
[0]);
1711 host_info
.h_addr
= (char*)(&numeric_addr
);
1713 /* numeric_addr isn't null-terminated; it has fixed length. */
1714 host_info
.h_length
= sizeof (numeric_addr
);
1717 bzero (&address
, sizeof address
);
1718 bcopy (host_info_ptr
->h_addr
, (char *) &address
.sin_addr
,
1719 host_info_ptr
->h_length
);
1720 address
.sin_family
= host_info_ptr
->h_addrtype
;
1721 address
.sin_port
= port
;
1723 s
= socket (host_info_ptr
->h_addrtype
, SOCK_STREAM
, 0);
1725 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1727 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
1728 when connect is interrupted. So let's not let it get interrupted.
1729 Note we do not turn off polling, because polling is only used
1730 when not interrupt_input, and thus not normally used on the systems
1731 which have this bug. On systems which use polling, there's no way
1732 to quit if polling is turned off. */
1733 if (interrupt_input
)
1741 if (connect (s
, (struct sockaddr
*) &address
, sizeof address
) == -1
1742 && errno
!= EISCONN
)
1750 if (errno
== EADDRINUSE
&& retry
< 20)
1752 /* A delay here is needed on some FreeBSD systems,
1753 and it is harmless, since this retrying takes time anyway
1754 and should be infrequent. */
1755 Fsleep_for (make_number (1), Qnil
);
1762 if (interrupt_input
)
1766 report_file_error ("connection failed",
1767 Fcons (host
, Fcons (name
, Qnil
)));
1772 #ifdef POLL_FOR_INPUT
1773 unbind_to (count
, Qnil
);
1776 if (interrupt_input
)
1780 s
= connect_server (0);
1782 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1783 send_command (s
, C_PORT
, 0, "%s:%d", XSTRING (host
)->data
, ntohs (port
));
1784 send_command (s
, C_DUMB
, 1, 0);
1790 report_file_error ("error duplicating socket", Fcons (name
, Qnil
));
1793 buffer
= Fget_buffer_create (buffer
);
1794 proc
= make_process (name
);
1796 chan_process
[inch
] = proc
;
1799 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
1802 fcntl (inch
, F_SETFL
, O_NDELAY
);
1806 XPROCESS (proc
)->childp
= Fcons (host
, Fcons (service
, Qnil
));
1807 XPROCESS (proc
)->command_channel_p
= Qnil
;
1808 XPROCESS (proc
)->buffer
= buffer
;
1809 XPROCESS (proc
)->sentinel
= Qnil
;
1810 XPROCESS (proc
)->filter
= Qnil
;
1811 XPROCESS (proc
)->command
= Qnil
;
1812 XPROCESS (proc
)->pid
= Qnil
;
1813 XSETINT (XPROCESS (proc
)->infd
, inch
);
1814 XSETINT (XPROCESS (proc
)->outfd
, outch
);
1815 XPROCESS (proc
)->status
= Qrun
;
1816 FD_SET (inch
, &input_wait_mask
);
1817 FD_SET (inch
, &non_keyboard_wait_mask
);
1818 if (inch
> max_process_desc
)
1819 max_process_desc
= inch
;
1824 #endif /* HAVE_SOCKETS */
1826 deactivate_process (proc
)
1829 register int inchannel
, outchannel
;
1830 register struct Lisp_Process
*p
= XPROCESS (proc
);
1832 inchannel
= XINT (p
->infd
);
1833 outchannel
= XINT (p
->outfd
);
1837 /* Beware SIGCHLD hereabouts. */
1838 flush_pending_output (inchannel
);
1841 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
1842 sys$
dassgn (outchannel
);
1843 vs
= get_vms_process_pointer (p
->pid
);
1845 give_back_vms_process_stuff (vs
);
1849 if (outchannel
>= 0 && outchannel
!= inchannel
)
1853 XSETINT (p
->infd
, -1);
1854 XSETINT (p
->outfd
, -1);
1855 chan_process
[inchannel
] = Qnil
;
1856 FD_CLR (inchannel
, &input_wait_mask
);
1857 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
1858 if (inchannel
== max_process_desc
)
1861 /* We just closed the highest-numbered process input descriptor,
1862 so recompute the highest-numbered one now. */
1863 max_process_desc
= 0;
1864 for (i
= 0; i
< MAXDESC
; i
++)
1865 if (!NILP (chan_process
[i
]))
1866 max_process_desc
= i
;
1871 /* Close all descriptors currently in use for communication
1872 with subprocess. This is used in a newly-forked subprocess
1873 to get rid of irrelevant descriptors. */
1875 close_process_descs ()
1879 for (i
= 0; i
< MAXDESC
; i
++)
1881 Lisp_Object process
;
1882 process
= chan_process
[i
];
1883 if (!NILP (process
))
1885 int in
= XINT (XPROCESS (process
)->infd
);
1886 int out
= XINT (XPROCESS (process
)->outfd
);
1889 if (out
>= 0 && in
!= out
)
1896 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
1898 "Allow any pending output from subprocesses to be read by Emacs.\n\
1899 It is read into the process' buffers or given to their filter functions.\n\
1900 Non-nil arg PROCESS means do not return until some output has been received\n\
1902 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
1903 seconds and microseconds to wait; return after that much time whether\n\
1904 or not there is input.\n\
1905 Return non-nil iff we received any output before the timeout expired.")
1906 (process
, timeout
, timeout_msecs
)
1907 register Lisp_Object process
, timeout
, timeout_msecs
;
1912 if (! NILP (timeout_msecs
))
1914 CHECK_NUMBER (timeout_msecs
, 2);
1915 useconds
= XINT (timeout_msecs
);
1916 if (!INTEGERP (timeout
))
1917 XSETINT (timeout
, 0);
1920 int carry
= useconds
/ 1000000;
1922 XSETINT (timeout
, XINT (timeout
) + carry
);
1923 useconds
-= carry
* 1000000;
1925 /* I think this clause is necessary because C doesn't
1926 guarantee a particular rounding direction for negative
1930 XSETINT (timeout
, XINT (timeout
) - 1);
1931 useconds
+= 1000000;
1938 if (! NILP (timeout
))
1940 CHECK_NUMBER (timeout
, 1);
1941 seconds
= XINT (timeout
);
1942 if (seconds
< 0 || (seconds
== 0 && useconds
== 0))
1954 XSETFASTINT (process
, 0);
1957 (wait_reading_process_input (seconds
, useconds
, process
, 0)
1961 /* This variable is different from waiting_for_input in keyboard.c.
1962 It is used to communicate to a lisp process-filter/sentinel (via the
1963 function Fwaiting_for_user_input_p below) whether emacs was waiting
1964 for user-input when that process-filter was called.
1965 waiting_for_input cannot be used as that is by definition 0 when
1966 lisp code is being evalled.
1967 This is also used in record_asynch_buffer_change.
1968 For that purpose, this must be 0
1969 when not inside wait_reading_process_input. */
1970 static int waiting_for_user_input_p
;
1972 /* This is here so breakpoints can be put on it. */
1974 wait_reading_process_input_1 ()
1978 /* Read and dispose of subprocess output while waiting for timeout to
1979 elapse and/or keyboard input to be available.
1982 timeout in seconds, or
1983 zero for no limit, or
1984 -1 means gobble data immediately available but don't wait for any.
1987 an additional duration to wait, measured in microseconds.
1988 If this is nonzero and time_limit is 0, then the timeout
1989 consists of MICROSECS only.
1991 READ_KBD is a lisp value:
1992 0 to ignore keyboard input, or
1993 1 to return when input is available, or
1994 -1 meaning caller will actually read the input, so don't throw to
1995 the quit handler, or
1996 a cons cell, meaning wait until its car is non-nil
1997 (and gobble terminal input into the buffer if any arrives), or
1998 a process object, meaning wait until something arrives from that
1999 process. The return value is true iff we read some input from
2002 DO_DISPLAY != 0 means redisplay should be done to show subprocess
2003 output that arrives.
2005 If READ_KBD is a pointer to a struct Lisp_Process, then the
2006 function returns true iff we received input from that process
2007 before the timeout elapsed.
2008 Otherwise, return true iff we received input from any process. */
2010 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
2011 int time_limit
, microsecs
;
2012 Lisp_Object read_kbd
;
2015 register int channel
, nfds
, m
;
2016 static SELECT_TYPE Available
;
2019 EMACS_TIME timeout
, end_time
, garbage
;
2021 int wait_channel
= -1;
2022 struct Lisp_Process
*wait_proc
= 0;
2023 int got_some_input
= 0;
2024 Lisp_Object
*wait_for_cell
= 0;
2026 FD_ZERO (&Available
);
2028 /* If read_kbd is a process to watch, set wait_proc and wait_channel
2030 if (PROCESSP (read_kbd
))
2032 wait_proc
= XPROCESS (read_kbd
);
2033 wait_channel
= XINT (wait_proc
->infd
);
2034 XSETFASTINT (read_kbd
, 0);
2037 /* If waiting for non-nil in a cell, record where. */
2038 if (CONSP (read_kbd
))
2040 wait_for_cell
= &XCONS (read_kbd
)->car
;
2041 XSETFASTINT (read_kbd
, 0);
2044 waiting_for_user_input_p
= XINT (read_kbd
);
2046 /* Since we may need to wait several times,
2047 compute the absolute time to return at. */
2048 if (time_limit
|| microsecs
)
2050 EMACS_GET_TIME (end_time
);
2051 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
2052 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
2055 /* AlainF 5-Jul-1996
2056 HP-UX 10.10 seem to have problems with signals coming in
2057 Causes "poll: interrupted system call" messages when Emacs is run
2059 Turn off periodic alarms (in case they are in use) */
2065 int timeout_reduced_for_timers
= 0;
2067 /* If calling from keyboard input, do not quit
2068 since we want to return C-g as an input character.
2069 Otherwise, do pending quit if requested. */
2070 if (XINT (read_kbd
) >= 0)
2073 /* Exit now if the cell we're waiting for became non-nil. */
2074 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2077 /* Compute time from now till when time limit is up */
2078 /* Exit if already run out */
2079 if (time_limit
== -1)
2081 /* -1 specified for timeout means
2082 gobble output available now
2083 but don't wait at all. */
2085 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2087 else if (time_limit
|| microsecs
)
2089 EMACS_GET_TIME (timeout
);
2090 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
2091 if (EMACS_TIME_NEG_P (timeout
))
2096 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
2099 /* Normally we run timers here.
2100 But not if wait_for_cell; in those cases,
2101 the wait is supposed to be short,
2102 and those callers cannot handle running arbitrary Lisp code here. */
2103 if (! wait_for_cell
)
2105 EMACS_TIME timer_delay
;
2109 old_timers_run
= timers_run
;
2110 timer_delay
= timer_check (1);
2111 if (timers_run
!= old_timers_run
&& do_display
)
2113 redisplay_preserve_echo_area ();
2114 /* We must retry, since a timer may have requeued itself
2115 and that could alter the time_delay. */
2119 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
2121 EMACS_TIME difference
;
2122 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
2123 if (EMACS_TIME_NEG_P (difference
))
2125 timeout
= timer_delay
;
2126 timeout_reduced_for_timers
= 1;
2129 /* If time_limit is -1, we are not going to wait at all. */
2130 else if (time_limit
!= -1)
2132 /* This is so a breakpoint can be put here. */
2133 wait_reading_process_input_1 ();
2137 /* Cause C-g and alarm signals to take immediate action,
2138 and cause input available signals to zero out timeout.
2140 It is important that we do this before checking for process
2141 activity. If we get a SIGCHLD after the explicit checks for
2142 process activity, timeout is the only way we will know. */
2143 if (XINT (read_kbd
) < 0)
2144 set_waiting_for_input (&timeout
);
2146 /* If status of something has changed, and no input is
2147 available, notify the user of the change right away. After
2148 this explicit check, we'll let the SIGCHLD handler zap
2149 timeout to get our attention. */
2150 if (update_tick
!= process_tick
&& do_display
)
2152 Atemp
= input_wait_mask
;
2153 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2154 if ((select (MAXDESC
, &Atemp
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2158 /* It's okay for us to do this and then continue with
2159 the loop, since timeout has already been zeroed out. */
2160 clear_waiting_for_input ();
2165 /* Don't wait for output from a non-running process. */
2166 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
2167 update_status (wait_proc
);
2169 && ! EQ (wait_proc
->status
, Qrun
))
2171 clear_waiting_for_input ();
2175 /* Wait till there is something to do */
2177 if (! XINT (read_kbd
) && wait_for_cell
== 0)
2178 Available
= non_keyboard_wait_mask
;
2180 Available
= input_wait_mask
;
2182 /* If frame size has changed or the window is newly mapped,
2183 redisplay now, before we start to wait. There is a race
2184 condition here; if a SIGIO arrives between now and the select
2185 and indicates that a frame is trashed, the select may block
2186 displaying a trashed screen. */
2187 if (frame_garbaged
&& do_display
)
2189 clear_waiting_for_input ();
2190 redisplay_preserve_echo_area ();
2191 if (XINT (read_kbd
) < 0)
2192 set_waiting_for_input (&timeout
);
2195 if (XINT (read_kbd
) && detect_input_pending ())
2198 FD_ZERO (&Available
);
2201 nfds
= select (MAXDESC
, &Available
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2206 /* Make C-g and alarm signals set flags again */
2207 clear_waiting_for_input ();
2209 /* If we woke up due to SIGWINCH, actually change size now. */
2210 do_pending_window_change ();
2212 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
2213 /* We wanted the full specified time, so return now. */
2217 if (xerrno
== EINTR
)
2218 FD_ZERO (&Available
);
2220 /* Ultrix select seems to return ENOMEM when it is
2221 interrupted. Treat it just like EINTR. Bleah. Note
2222 that we want to test for the "ultrix" CPP symbol, not
2223 "__ultrix__"; the latter is only defined under GCC, but
2224 not by DEC's bundled CC. -JimB */
2225 else if (xerrno
== ENOMEM
)
2226 FD_ZERO (&Available
);
2229 /* This happens for no known reason on ALLIANT.
2230 I am guessing that this is the right response. -- RMS. */
2231 else if (xerrno
== EFAULT
)
2232 FD_ZERO (&Available
);
2234 else if (xerrno
== EBADF
)
2237 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
2238 the child's closure of the pts gives the parent a SIGHUP, and
2239 the ptc file descriptor is automatically closed,
2240 yielding EBADF here or at select() call above.
2241 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
2242 in m/ibmrt-aix.h), and here we just ignore the select error.
2243 Cleanup occurs c/o status_notify after SIGCLD. */
2244 FD_ZERO (&Available
); /* Cannot depend on values returned */
2250 error ("select error: %s", strerror (xerrno
));
2252 #if defined(sun) && !defined(USG5_4)
2253 else if (nfds
> 0 && keyboard_bit_set (&Available
)
2255 /* System sometimes fails to deliver SIGIO.
2257 David J. Mackenzie says that Emacs doesn't compile under
2258 Solaris if this code is enabled, thus the USG5_4 in the CPP
2259 conditional. "I haven't noticed any ill effects so far.
2260 If you find a Solaris expert somewhere, they might know
2262 kill (getpid (), SIGIO
);
2265 /* Check for keyboard input */
2266 /* If there is any, return immediately
2267 to give it higher priority than subprocesses */
2269 if ((XINT (read_kbd
) != 0)
2270 && detect_input_pending_run_timers (do_display
))
2272 swallow_events (do_display
);
2273 if (detect_input_pending_run_timers (do_display
))
2277 /* If wait_for_cell. check for keyboard input
2278 but don't run any timers.
2279 ??? (It seems wrong to me to check for keyboard
2280 input at all when wait_for_cell, but the code
2281 has been this way since July 1994.
2282 Try changing this after version 19.31.) */
2284 && detect_input_pending ())
2286 swallow_events (do_display
);
2287 if (detect_input_pending ())
2291 /* Exit now if the cell we're waiting for became non-nil. */
2292 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2296 /* If we think we have keyboard input waiting, but didn't get SIGIO
2297 go read it. This can happen with X on BSD after logging out.
2298 In that case, there really is no input and no SIGIO,
2299 but select says there is input. */
2301 if (XINT (read_kbd
) && interrupt_input
2302 && (keyboard_bit_set (&Available
)))
2303 kill (getpid (), SIGIO
);
2307 got_some_input
|= nfds
> 0;
2309 /* If checking input just got us a size-change event from X,
2310 obey it now if we should. */
2311 if (XINT (read_kbd
) || wait_for_cell
)
2312 do_pending_window_change ();
2314 /* Check for data from a process. */
2315 /* Really FIRST_PROC_DESC should be 0 on Unix,
2316 but this is safer in the short run. */
2317 for (channel
= 0; channel
<= max_process_desc
; channel
++)
2319 if (FD_ISSET (channel
, &Available
)
2320 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
2324 /* If waiting for this channel, arrange to return as
2325 soon as no more input to be processed. No more
2327 if (wait_channel
== channel
)
2333 proc
= chan_process
[channel
];
2337 /* Read data from the process, starting with our
2338 buffered-ahead character if we have one. */
2340 nread
= read_process_output (proc
, channel
);
2343 /* Since read_process_output can run a filter,
2344 which can call accept-process-output,
2345 don't try to read from any other processes
2346 before doing the select again. */
2347 FD_ZERO (&Available
);
2350 redisplay_preserve_echo_area ();
2353 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2356 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
2357 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
2359 else if (nread
== -1 && errno
== EAGAIN
)
2363 else if (nread
== -1 && errno
== EAGAIN
)
2365 /* Note that we cannot distinguish between no input
2366 available now and a closed pipe.
2367 With luck, a closed pipe will be accompanied by
2368 subprocess termination and SIGCHLD. */
2369 else if (nread
== 0 && !NETCONN_P (proc
))
2371 #endif /* O_NDELAY */
2372 #endif /* O_NONBLOCK */
2374 /* On some OSs with ptys, when the process on one end of
2375 a pty exits, the other end gets an error reading with
2376 errno = EIO instead of getting an EOF (0 bytes read).
2377 Therefore, if we get an error reading and errno =
2378 EIO, just continue, because the child process has
2379 exited and should clean itself up soon (e.g. when we
2381 else if (nread
== -1 && errno
== EIO
)
2383 #endif /* HAVE_PTYS */
2384 /* If we can detect process termination, don't consider the process
2385 gone just because its pipe is closed. */
2387 else if (nread
== 0 && !NETCONN_P (proc
))
2392 /* Preserve status of processes already terminated. */
2393 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2394 deactivate_process (proc
);
2395 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2396 update_status (XPROCESS (proc
));
2397 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2398 XPROCESS (proc
)->status
2399 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2402 } /* end for each file descriptor */
2403 } /* end while exit conditions not met */
2405 waiting_for_user_input_p
= 0;
2407 /* If calling from keyboard input, do not quit
2408 since we want to return C-g as an input character.
2409 Otherwise, do pending quit if requested. */
2410 if (XINT (read_kbd
) >= 0)
2412 /* Prevent input_pending from remaining set if we quit. */
2413 clear_input_pending ();
2417 /* AlainF 5-Jul-1996
2418 HP-UX 10.10 seems to have problems with signals coming in
2419 Causes "poll: interrupted system call" messages when Emacs is run
2421 Turn periodic alarms back on */
2425 return got_some_input
;
2428 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
2431 read_process_output_call (fun_and_args
)
2432 Lisp_Object fun_and_args
;
2434 return apply1 (XCONS (fun_and_args
)->car
, XCONS (fun_and_args
)->cdr
);
2438 read_process_output_error_handler (error
)
2441 cmd_error_internal (error
, "error in process filter: ");
2443 update_echo_area ();
2444 Fsleep_for (make_number (2), Qnil
);
2447 /* Read pending output from the process channel,
2448 starting with our buffered-ahead character if we have one.
2449 Yield number of characters read.
2451 This function reads at most 1024 characters.
2452 If you want to read all available subprocess output,
2453 you must call it repeatedly until it returns zero. */
2455 read_process_output (proc
, channel
)
2457 register int channel
;
2459 register int nchars
;
2465 register Lisp_Object outstream
;
2466 register struct buffer
*old
= current_buffer
;
2467 register struct Lisp_Process
*p
= XPROCESS (proc
);
2468 register int opoint
;
2471 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2473 vs
= get_vms_process_pointer (p
->pid
);
2477 return(0); /* Really weird if it does this */
2478 if (!(vs
->iosb
[0] & 1))
2479 return -1; /* I/O error */
2482 error ("Could not get VMS process pointer");
2483 chars
= vs
->inputBuffer
;
2484 nchars
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2487 start_vms_process_read (vs
); /* Crank up the next read on the process */
2488 return 1; /* Nothing worth printing, say we got 1 */
2492 if (proc_buffered_char
[channel
] < 0)
2493 nchars
= read (channel
, chars
, sizeof (chars
));
2496 chars
[0] = proc_buffered_char
[channel
];
2497 proc_buffered_char
[channel
] = -1;
2498 nchars
= read (channel
, chars
+ 1, sizeof (chars
) - 1);
2502 nchars
= nchars
+ 1;
2504 #endif /* not VMS */
2506 if (nchars
<= 0) return nchars
;
2508 outstream
= p
->filter
;
2509 if (!NILP (outstream
))
2511 /* We inhibit quit here instead of just catching it so that
2512 hitting ^G when a filter happens to be running won't screw
2514 int count
= specpdl_ptr
- specpdl
;
2515 Lisp_Object odeactivate
;
2516 Lisp_Object obuffer
, okeymap
;
2518 /* No need to gcpro these, because all we do with them later
2519 is test them for EQness, and none of them should be a string. */
2520 odeactivate
= Vdeactivate_mark
;
2521 XSETBUFFER (obuffer
, current_buffer
);
2522 okeymap
= current_buffer
->keymap
;
2524 specbind (Qinhibit_quit
, Qt
);
2525 specbind (Qlast_nonmenu_event
, Qt
);
2527 running_asynch_code
= 1;
2528 internal_condition_case_1 (read_process_output_call
,
2531 Fcons (make_string (chars
,
2534 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
2535 read_process_output_error_handler
);
2536 running_asynch_code
= 0;
2537 restore_match_data ();
2539 /* Handling the process output should not deactivate the mark. */
2540 Vdeactivate_mark
= odeactivate
;
2542 #if 0 /* Call record_asynch_buffer_change unconditionally,
2543 because we might have changed minor modes or other things
2544 that affect key bindings. */
2545 if (! EQ (Fcurrent_buffer (), obuffer
)
2546 || ! EQ (current_buffer
->keymap
, okeymap
))
2548 /* But do it only if the caller is actually going to read events.
2549 Otherwise there's no need to make him wake up, and it could
2550 cause trouble (for example it would make Fsit_for return). */
2551 if (waiting_for_user_input_p
== -1)
2552 record_asynch_buffer_change ();
2555 start_vms_process_read (vs
);
2557 unbind_to (count
, Qnil
);
2561 /* If no filter, write into buffer if it isn't dead. */
2562 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2564 Lisp_Object old_read_only
;
2565 Lisp_Object old_begv
, old_zv
;
2566 Lisp_Object odeactivate
;
2568 odeactivate
= Vdeactivate_mark
;
2570 Fset_buffer (p
->buffer
);
2572 old_read_only
= current_buffer
->read_only
;
2573 XSETFASTINT (old_begv
, BEGV
);
2574 XSETFASTINT (old_zv
, ZV
);
2576 current_buffer
->read_only
= Qnil
;
2578 /* Insert new output into buffer
2579 at the current end-of-output marker,
2580 thus preserving logical ordering of input and output. */
2581 if (XMARKER (p
->mark
)->buffer
)
2582 SET_PT (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
));
2586 /* If the output marker is outside of the visible region, save
2587 the restriction and widen. */
2588 if (! (BEGV
<= PT
&& PT
<= ZV
))
2591 /* Make sure opoint floats ahead of any new text, just as point
2596 /* Insert after old_begv, but before old_zv. */
2597 if (PT
< XFASTINT (old_begv
))
2598 XSETFASTINT (old_begv
, XFASTINT (old_begv
) + nchars
);
2599 if (PT
<= XFASTINT (old_zv
))
2600 XSETFASTINT (old_zv
, XFASTINT (old_zv
) + nchars
);
2602 /* Insert before markers in case we are inserting where
2603 the buffer's mark is, and the user's next command is Meta-y. */
2604 insert_before_markers (chars
, nchars
);
2605 Fset_marker (p
->mark
, make_number (PT
), p
->buffer
);
2607 update_mode_lines
++;
2609 /* If the restriction isn't what it should be, set it. */
2610 if (XFASTINT (old_begv
) != BEGV
|| XFASTINT (old_zv
) != ZV
)
2611 Fnarrow_to_region (old_begv
, old_zv
);
2613 /* Handling the process output should not deactivate the mark. */
2614 Vdeactivate_mark
= odeactivate
;
2616 current_buffer
->read_only
= old_read_only
;
2618 set_buffer_internal (old
);
2621 start_vms_process_read (vs
);
2626 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
2628 "Returns non-nil if emacs is waiting for input from the user.\n\
2629 This is intended for use by asynchronous process output filters and sentinels.")
2632 return (waiting_for_user_input_p
? Qt
: Qnil
);
2635 /* Sending data to subprocess */
2637 jmp_buf send_process_frame
;
2640 send_process_trap ()
2646 longjmp (send_process_frame
, 1);
2649 /* Send some data to process PROC.
2650 BUF is the beginning of the data; LEN is the number of characters.
2651 OBJECT is the Lisp object that the data comes from. */
2653 send_process (proc
, buf
, len
, object
)
2654 volatile Lisp_Object proc
;
2659 /* Use volatile to protect variables from being clobbered by longjmp. */
2661 volatile unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
2662 struct gcpro gcpro1
;
2667 struct Lisp_Process
*p
= XPROCESS (proc
);
2668 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2671 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2672 update_status (XPROCESS (proc
));
2673 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2674 error ("Process %s not running", procname
);
2677 vs
= get_vms_process_pointer (p
->pid
);
2679 error ("Could not find this process: %x", p
->pid
);
2680 else if (write_to_vms_process (vs
, buf
, len
))
2684 if (pty_max_bytes
== 0)
2686 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
2687 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
2689 if (pty_max_bytes
< 0)
2690 pty_max_bytes
= 250;
2692 pty_max_bytes
= 250;
2694 /* Deduct one, to leave space for the eof. */
2698 if (!setjmp (send_process_frame
))
2702 SIGTYPE (*old_sigpipe
)();
2705 /* Decide how much data we can send in one batch.
2706 Long lines need to be split into multiple batches. */
2707 if (!NILP (XPROCESS (proc
)->pty_flag
))
2709 /* Starting this at zero is always correct when not the first iteration
2710 because the previous iteration ended by sending C-d.
2711 It may not be correct for the first iteration
2712 if a partial line was sent in a separate send_process call.
2713 If that proves worth handling, we need to save linepos
2714 in the process object. */
2717 char *end
= buf
+ len
;
2719 /* Scan through this text for a line that is too long. */
2720 while (ptr
!= end
&& linepos
< pty_max_bytes
)
2728 /* If we found one, break the line there
2729 and put in a C-d to force the buffer through. */
2733 /* Send this batch, using one or more write calls. */
2736 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
2737 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
2738 signal (SIGPIPE
, old_sigpipe
);
2744 || errno
== EWOULDBLOCK
2750 /* Buffer is full. Wait, accepting input;
2751 that may allow the program
2752 to finish doing output and read more. */
2757 /* Running filters might relocate buffers or strings.
2758 Arrange to relocate BUF. */
2759 if (BUFFERP (object
))
2760 offset
= BUF_PTR_CHAR_POS (XBUFFER (object
),
2761 (unsigned char *) buf
);
2762 else if (STRINGP (object
))
2763 offset
= buf
- (char *) XSTRING (object
)->data
;
2765 XSETFASTINT (zero
, 0);
2766 wait_reading_process_input (1, 0, zero
, 0);
2768 if (BUFFERP (object
))
2769 buf
= (char *) BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
2770 else if (STRINGP (object
))
2771 buf
= offset
+ (char *) XSTRING (object
)->data
;
2776 /* This is a real error. */
2777 report_file_error ("writing to process", Fcons (proc
, Qnil
));
2784 /* If we sent just part of the string, put in an EOF
2785 to force it through, before we send the rest. */
2787 Fprocess_send_eof (proc
);
2792 XPROCESS (proc
)->raw_status_low
= Qnil
;
2793 XPROCESS (proc
)->raw_status_high
= Qnil
;
2794 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2795 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2796 deactivate_process (proc
);
2798 error ("Error writing to process %s; closed it", procname
);
2800 error ("SIGPIPE raised on process %s; closed it", procname
);
2807 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
2809 "Send current contents of region as input to PROCESS.\n\
2810 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2811 nil, indicating the current buffer's process.\n\
2812 Called from program, takes three arguments, PROCESS, START and END.\n\
2813 If the region is more than 500 characters long,\n\
2814 it is sent in several bunches. This may happen even for shorter regions.\n\
2815 Output from processes can arrive in between bunches.")
2816 (process
, start
, end
)
2817 Lisp_Object process
, start
, end
;
2822 proc
= get_process (process
);
2823 validate_region (&start
, &end
);
2825 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
2828 start1
= XINT (start
);
2829 send_process (proc
, &FETCH_CHAR (start1
), XINT (end
) - XINT (start
),
2830 Fcurrent_buffer ());
2835 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
2837 "Send PROCESS the contents of STRING as input.\n\
2838 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2839 nil, indicating the current buffer's process.\n\
2840 If STRING is more than 500 characters long,\n\
2841 it is sent in several bunches. This may happen even for shorter strings.\n\
2842 Output from processes can arrive in between bunches.")
2844 Lisp_Object process
, string
;
2847 CHECK_STRING (string
, 1);
2848 proc
= get_process (process
);
2849 send_process (proc
, XSTRING (string
)->data
, XSTRING (string
)->size
, string
);
2853 /* send a signal number SIGNO to PROCESS.
2854 CURRENT_GROUP means send to the process group that currently owns
2855 the terminal being used to communicate with PROCESS.
2856 This is used for various commands in shell mode.
2857 If NOMSG is zero, insert signal-announcements into process's buffers
2860 If we can, we try to signal PROCESS by sending control characters
2861 down the pty. This allows us to signal inferiors who have changed
2862 their uid, for which killpg would return an EPERM error. */
2865 process_send_signal (process
, signo
, current_group
, nomsg
)
2866 Lisp_Object process
;
2868 Lisp_Object current_group
;
2872 register struct Lisp_Process
*p
;
2876 proc
= get_process (process
);
2877 p
= XPROCESS (proc
);
2879 if (!EQ (p
->childp
, Qt
))
2880 error ("Process %s is not a subprocess",
2881 XSTRING (p
->name
)->data
);
2882 if (XINT (p
->infd
) < 0)
2883 error ("Process %s is not active",
2884 XSTRING (p
->name
)->data
);
2886 if (NILP (p
->pty_flag
))
2887 current_group
= Qnil
;
2889 /* If we are using pgrps, get a pgrp number and make it negative. */
2890 if (!NILP (current_group
))
2892 #ifdef SIGNALS_VIA_CHARACTERS
2893 /* If possible, send signals to the entire pgrp
2894 by sending an input character to it. */
2896 /* TERMIOS is the latest and bestest, and seems most likely to
2897 work. If the system has it, use it. */
2904 tcgetattr (XINT (p
->infd
), &t
);
2905 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2909 tcgetattr (XINT (p
->infd
), &t
);
2910 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2914 tcgetattr (XINT (p
->infd
), &t
);
2915 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
2916 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2918 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
2923 #else /* ! HAVE_TERMIOS */
2925 /* On Berkeley descendants, the following IOCTL's retrieve the
2926 current control characters. */
2927 #if defined (TIOCGLTC) && defined (TIOCGETC)
2935 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2936 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
2939 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2940 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
2944 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
2945 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
2947 #endif /* ! defined (SIGTSTP) */
2950 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2952 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
2959 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2960 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2963 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2964 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2968 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2969 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2971 #endif /* ! defined (SIGTSTP) */
2973 #else /* ! defined (TCGETA) */
2974 Your configuration files are messed up
.
2975 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
2976 you'd better be using one of the alternatives above! */
2977 #endif /* ! defined (TCGETA) */
2978 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2979 #endif /* ! defined HAVE_TERMIOS */
2980 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
2983 /* Get the pgrp using the tty itself, if we have that.
2984 Otherwise, use the pty to get the pgrp.
2985 On pfa systems, saka@pfu.fujitsu.co.JP writes:
2986 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
2987 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
2988 His patch indicates that if TIOCGPGRP returns an error, then
2989 we should just assume that p->pid is also the process group id. */
2993 if (!NILP (p
->subtty
))
2994 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
2996 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
3000 gid
= - XFASTINT (p
->pid
);
3001 #endif /* ! defined (pfa) */
3007 #else /* ! defined (TIOCGPGRP ) */
3008 /* Can't select pgrps on this system, so we know that
3009 the child itself heads the pgrp. */
3010 gid
= - XFASTINT (p
->pid
);
3011 #endif /* ! defined (TIOCGPGRP ) */
3014 gid
= - XFASTINT (p
->pid
);
3020 p
->raw_status_low
= Qnil
;
3021 p
->raw_status_high
= Qnil
;
3023 XSETINT (p
->tick
, ++process_tick
);
3027 #endif /* ! defined (SIGCONT) */
3030 send_process (proc
, "\003", 1, Qnil
); /* ^C */
3035 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
3040 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
3043 flush_pending_output (XINT (p
->infd
));
3047 /* If we don't have process groups, send the signal to the immediate
3048 subprocess. That isn't really right, but it's better than any
3049 obvious alternative. */
3052 kill (XFASTINT (p
->pid
), signo
);
3056 /* gid may be a pid, or minus a pgrp's number */
3058 if (!NILP (current_group
))
3059 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
3062 gid
= - XFASTINT (p
->pid
);
3065 #else /* ! defined (TIOCSIGSEND) */
3066 EMACS_KILLPG (-gid
, signo
);
3067 #endif /* ! defined (TIOCSIGSEND) */
3070 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
3071 "Interrupt process PROCESS. May be process or name of one.\n\
3072 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
3073 nil or no arg means current buffer's process.\n\
3074 Second arg CURRENT-GROUP non-nil means send signal to\n\
3075 the current process-group of the process's controlling terminal\n\
3076 rather than to the process's own process group.\n\
3077 If the process is a shell, this means interrupt current subjob\n\
3078 rather than the shell.")
3079 (process
, current_group
)
3080 Lisp_Object process
, current_group
;
3082 process_send_signal (process
, SIGINT
, current_group
, 0);
3086 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
3087 "Kill process PROCESS. May be process or name of one.\n\
3088 See function `interrupt-process' for more details on usage.")
3089 (process
, current_group
)
3090 Lisp_Object process
, current_group
;
3092 process_send_signal (process
, SIGKILL
, current_group
, 0);
3096 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
3097 "Send QUIT signal to process PROCESS. May be process or name of one.\n\
3098 See function `interrupt-process' for more details on usage.")
3099 (process
, current_group
)
3100 Lisp_Object process
, current_group
;
3102 process_send_signal (process
, SIGQUIT
, current_group
, 0);
3106 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
3107 "Stop process PROCESS. May be process or name of one.\n\
3108 See function `interrupt-process' for more details on usage.")
3109 (process
, current_group
)
3110 Lisp_Object process
, current_group
;
3113 error ("no SIGTSTP support");
3115 process_send_signal (process
, SIGTSTP
, current_group
, 0);
3120 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
3121 "Continue process PROCESS. May be process or name of one.\n\
3122 See function `interrupt-process' for more details on usage.")
3123 (process
, current_group
)
3124 Lisp_Object process
, current_group
;
3127 process_send_signal (process
, SIGCONT
, current_group
, 0);
3129 error ("no SIGCONT support");
3134 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
3135 2, 2, "nProcess number: \nnSignal code: ",
3136 "Send the process with process id PID the signal with code SIGCODE.\n\
3137 PID must be an integer. The process need not be a child of this Emacs.\n\
3138 SIGCODE may be an integer, or a symbol whose name is a signal name.")
3140 Lisp_Object pid
, sigcode
;
3142 CHECK_NUMBER (pid
, 0);
3144 #define handle_signal(NAME, VALUE) \
3145 else if (!strcmp (name, NAME)) \
3146 XSETINT (sigcode, VALUE)
3148 if (INTEGERP (sigcode
))
3152 unsigned char *name
;
3154 CHECK_SYMBOL (sigcode
, 1);
3155 name
= XSYMBOL (sigcode
)->name
->data
;
3160 handle_signal ("SIGHUP", SIGHUP
);
3163 handle_signal ("SIGINT", SIGINT
);
3166 handle_signal ("SIGQUIT", SIGQUIT
);
3169 handle_signal ("SIGILL", SIGILL
);
3172 handle_signal ("SIGABRT", SIGABRT
);
3175 handle_signal ("SIGEMT", SIGEMT
);
3178 handle_signal ("SIGKILL", SIGKILL
);
3181 handle_signal ("SIGFPE", SIGFPE
);
3184 handle_signal ("SIGBUS", SIGBUS
);
3187 handle_signal ("SIGSEGV", SIGSEGV
);
3190 handle_signal ("SIGSYS", SIGSYS
);
3193 handle_signal ("SIGPIPE", SIGPIPE
);
3196 handle_signal ("SIGALRM", SIGALRM
);
3199 handle_signal ("SIGTERM", SIGTERM
);
3202 handle_signal ("SIGURG", SIGURG
);
3205 handle_signal ("SIGSTOP", SIGSTOP
);
3208 handle_signal ("SIGTSTP", SIGTSTP
);
3211 handle_signal ("SIGCONT", SIGCONT
);
3214 handle_signal ("SIGCHLD", SIGCHLD
);
3217 handle_signal ("SIGTTIN", SIGTTIN
);
3220 handle_signal ("SIGTTOU", SIGTTOU
);
3223 handle_signal ("SIGIO", SIGIO
);
3226 handle_signal ("SIGXCPU", SIGXCPU
);
3229 handle_signal ("SIGXFSZ", SIGXFSZ
);
3232 handle_signal ("SIGVTALRM", SIGVTALRM
);
3235 handle_signal ("SIGPROF", SIGPROF
);
3238 handle_signal ("SIGWINCH", SIGWINCH
);
3241 handle_signal ("SIGINFO", SIGINFO
);
3244 handle_signal ("SIGUSR1", SIGUSR1
);
3247 handle_signal ("SIGUSR2", SIGUSR2
);
3250 error ("Undefined signal name %s", name
);
3253 #undef handle_signal
3255 return make_number (kill (XINT (pid
), XINT (sigcode
)));
3258 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
3259 "Make PROCESS see end-of-file in its input.\n\
3260 Eof comes after any text already sent to it.\n\
3261 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3262 nil, indicating the current buffer's process.\n\
3263 If PROCESS is a network connection, or is a process communicating\n\
3264 through a pipe (as opposed to a pty), then you cannot send any more\n\
3265 text to PROCESS after you call this function.")
3267 Lisp_Object process
;
3271 proc
= get_process (process
);
3273 /* Make sure the process is really alive. */
3274 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3275 update_status (XPROCESS (proc
));
3276 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3277 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
3280 send_process (proc
, "\032", 1, Qnil
); /* ^z */
3282 if (!NILP (XPROCESS (proc
)->pty_flag
))
3283 send_process (proc
, "\004", 1, Qnil
);
3286 close (XINT (XPROCESS (proc
)->outfd
));
3287 XSETINT (XPROCESS (proc
)->outfd
, open (NULL_DEVICE
, O_WRONLY
));
3293 /* Kill all processes associated with `buffer'.
3294 If `buffer' is nil, kill all processes */
3296 kill_buffer_processes (buffer
)
3299 Lisp_Object tail
, proc
;
3301 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3303 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3304 if (GC_PROCESSP (proc
)
3305 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
3307 if (NETCONN_P (proc
))
3308 Fdelete_process (proc
);
3309 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
3310 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
3315 /* On receipt of a signal that a child status has changed,
3316 loop asking about children with changed statuses until
3317 the system says there are no more.
3318 All we do is change the status;
3319 we do not run sentinels or print notifications.
3320 That is saved for the next time keyboard input is done,
3321 in order to avoid timing errors. */
3323 /** WARNING: this can be called during garbage collection.
3324 Therefore, it must not be fooled by the presence of mark bits in
3327 /** USG WARNING: Although it is not obvious from the documentation
3328 in signal(2), on a USG system the SIGCLD handler MUST NOT call
3329 signal() before executing at least one wait(), otherwise the handler
3330 will be called again, resulting in an infinite loop. The relevant
3331 portion of the documentation reads "SIGCLD signals will be queued
3332 and the signal-catching function will be continually reentered until
3333 the queue is empty". Invoking signal() causes the kernel to reexamine
3334 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
3337 sigchld_handler (signo
)
3340 int old_errno
= errno
;
3342 register struct Lisp_Process
*p
;
3343 extern EMACS_TIME
*input_available_clear_time
;
3347 sigheld
|= sigbit (SIGCHLD
);
3359 #endif /* no WUNTRACED */
3360 /* Keep trying to get a status until we get a definitive result. */
3364 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
3366 while (pid
<= 0 && errno
== EINTR
);
3370 /* A real failure. We have done all our job, so return. */
3372 /* USG systems forget handlers when they are used;
3373 must reestablish each time */
3375 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
3378 sigheld
&= ~sigbit (SIGCHLD
);
3386 #endif /* no WNOHANG */
3388 /* Find the process that signaled us, and record its status. */
3391 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3393 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3394 p
= XPROCESS (proc
);
3395 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
3400 /* Look for an asynchronous process whose pid hasn't been filled
3403 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3405 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3406 p
= XPROCESS (proc
);
3407 if (INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
3412 /* Change the status of the process that was found. */
3415 union { int i
; WAITTYPE wt
; } u
;
3416 int clear_desc_flag
= 0;
3418 XSETINT (p
->tick
, ++process_tick
);
3420 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
3421 XSETINT (p
->raw_status_high
, u
.i
>> 16);
3423 /* If process has terminated, stop waiting for its output. */
3424 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
3425 && XINT (p
->infd
) >= 0)
3426 clear_desc_flag
= 1;
3428 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
3429 if (clear_desc_flag
)
3431 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
3432 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
3435 /* Tell wait_reading_process_input that it needs to wake up and
3437 if (input_available_clear_time
)
3438 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3441 /* There was no asynchronous process found for that id. Check
3442 if we have a synchronous process. */
3445 synch_process_alive
= 0;
3447 /* Report the status of the synchronous process. */
3449 synch_process_retcode
= WRETCODE (w
);
3450 else if (WIFSIGNALED (w
))
3452 int code
= WTERMSIG (w
);
3458 /* Suppress warning if the table has const char *. */
3459 signame
= (char *) sys_siglist
[code
];
3461 signame
= sys_errlist
[code
];
3465 signame
= "unknown";
3467 synch_process_death
= signame
;
3470 /* Tell wait_reading_process_input that it needs to wake up and
3472 if (input_available_clear_time
)
3473 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3476 /* On some systems, we must return right away.
3477 If any more processes want to signal us, we will
3479 Otherwise (on systems that have WNOHANG), loop around
3480 to use up all the processes that have something to tell us. */
3481 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT)
3483 signal (signo
, sigchld_handler
);
3487 #endif /* USG, but not HPUX with WNOHANG */
3493 exec_sentinel_unwind (data
)
3496 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
3501 exec_sentinel_error_handler (error
)
3504 cmd_error_internal (error
, "error in process sentinel: ");
3506 update_echo_area ();
3507 Fsleep_for (make_number (2), Qnil
);
3511 exec_sentinel (proc
, reason
)
3512 Lisp_Object proc
, reason
;
3514 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
3515 register struct Lisp_Process
*p
= XPROCESS (proc
);
3516 int count
= specpdl_ptr
- specpdl
;
3518 /* No need to gcpro these, because all we do with them later
3519 is test them for EQness, and none of them should be a string. */
3520 odeactivate
= Vdeactivate_mark
;
3521 XSETBUFFER (obuffer
, current_buffer
);
3522 okeymap
= current_buffer
->keymap
;
3524 sentinel
= p
->sentinel
;
3525 if (NILP (sentinel
))
3528 /* Zilch the sentinel while it's running, to avoid recursive invocations;
3529 assure that it gets restored no matter how the sentinel exits. */
3531 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
3532 /* Inhibit quit so that random quits don't screw up a running filter. */
3533 specbind (Qinhibit_quit
, Qt
);
3534 specbind (Qlast_nonmenu_event
, Qt
);
3536 running_asynch_code
= 1;
3537 internal_condition_case_1 (read_process_output_call
,
3539 Fcons (proc
, Fcons (reason
, Qnil
))),
3540 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
3541 exec_sentinel_error_handler
);
3542 running_asynch_code
= 0;
3543 restore_match_data ();
3545 Vdeactivate_mark
= odeactivate
;
3547 if (! EQ (Fcurrent_buffer (), obuffer
)
3548 || ! EQ (current_buffer
->keymap
, okeymap
))
3550 /* But do it only if the caller is actually going to read events.
3551 Otherwise there's no need to make him wake up, and it could
3552 cause trouble (for example it would make Fsit_for return). */
3553 if (waiting_for_user_input_p
== -1)
3554 record_asynch_buffer_change ();
3556 unbind_to (count
, Qnil
);
3559 /* Report all recent events of a change in process status
3560 (either run the sentinel or output a message).
3561 This is done while Emacs is waiting for keyboard input. */
3565 register Lisp_Object proc
, buffer
;
3566 Lisp_Object tail
, msg
;
3567 struct gcpro gcpro1
, gcpro2
;
3571 /* We need to gcpro tail; if read_process_output calls a filter
3572 which deletes a process and removes the cons to which tail points
3573 from Vprocess_alist, and then causes a GC, tail is an unprotected
3577 /* Set this now, so that if new processes are created by sentinels
3578 that we run, we get called again to handle their status changes. */
3579 update_tick
= process_tick
;
3581 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
3584 register struct Lisp_Process
*p
;
3586 proc
= Fcdr (Fcar (tail
));
3587 p
= XPROCESS (proc
);
3589 if (XINT (p
->tick
) != XINT (p
->update_tick
))
3591 XSETINT (p
->update_tick
, XINT (p
->tick
));
3593 /* If process is still active, read any output that remains. */
3594 if (XINT (p
->infd
) >= 0)
3595 while (! EQ (p
->filter
, Qt
)
3596 && read_process_output (proc
, XINT (p
->infd
)) > 0);
3600 /* Get the text to use for the message. */
3601 if (!NILP (p
->raw_status_low
))
3603 msg
= status_message (p
->status
);
3605 /* If process is terminated, deactivate it or delete it. */
3607 if (CONSP (p
->status
))
3608 symbol
= XCONS (p
->status
)->car
;
3610 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
3611 || EQ (symbol
, Qclosed
))
3613 if (delete_exited_processes
)
3614 remove_process (proc
);
3616 deactivate_process (proc
);
3619 /* Now output the message suitably. */
3620 if (!NILP (p
->sentinel
))
3621 exec_sentinel (proc
, msg
);
3622 /* Don't bother with a message in the buffer
3623 when a process becomes runnable. */
3624 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
3626 Lisp_Object ro
, tem
;
3627 struct buffer
*old
= current_buffer
;
3630 ro
= XBUFFER (buffer
)->read_only
;
3632 /* Avoid error if buffer is deleted
3633 (probably that's why the process is dead, too) */
3634 if (NILP (XBUFFER (buffer
)->name
))
3636 Fset_buffer (buffer
);
3638 /* Insert new output into buffer
3639 at the current end-of-output marker,
3640 thus preserving logical ordering of input and output. */
3641 if (XMARKER (p
->mark
)->buffer
)
3642 SET_PT (marker_position (p
->mark
));
3646 opoint
+= XSTRING (msg
)->size
+ XSTRING (p
->name
)->size
+ 10;
3648 tem
= current_buffer
->read_only
;
3649 current_buffer
->read_only
= Qnil
;
3650 insert_string ("\nProcess ");
3651 Finsert (1, &p
->name
);
3652 insert_string (" ");
3654 current_buffer
->read_only
= tem
;
3655 Fset_marker (p
->mark
, make_number (PT
), p
->buffer
);
3658 set_buffer_internal (old
);
3663 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
3664 redisplay_preserve_echo_area ();
3669 /* The first time this is called, assume keyboard input comes from DESC
3670 instead of from where we used to expect it.
3671 Subsequent calls mean assume input keyboard can come from DESC
3672 in addition to other places. */
3674 static int add_keyboard_wait_descriptor_called_flag
;
3677 add_keyboard_wait_descriptor (desc
)
3680 if (! add_keyboard_wait_descriptor_called_flag
)
3681 FD_CLR (0, &input_wait_mask
);
3682 add_keyboard_wait_descriptor_called_flag
= 1;
3683 FD_SET (desc
, &input_wait_mask
);
3684 if (desc
> max_keyboard_desc
)
3685 max_keyboard_desc
= desc
;
3688 /* From now on, do not expect DESC to give keyboard input. */
3691 delete_keyboard_wait_descriptor (desc
)
3695 int lim
= max_keyboard_desc
;
3697 FD_CLR (desc
, &input_wait_mask
);
3699 if (desc
== max_keyboard_desc
)
3700 for (fd
= 0; fd
< lim
; fd
++)
3701 if (FD_ISSET (fd
, &input_wait_mask
)
3702 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3703 max_keyboard_desc
= fd
;
3706 /* Return nonzero if *MASK has a bit set
3707 that corresponds to one of the keyboard input descriptors. */
3710 keyboard_bit_set (mask
)
3715 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
3716 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
3717 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3729 if (! noninteractive
|| initialized
)
3731 signal (SIGCHLD
, sigchld_handler
);
3734 FD_ZERO (&input_wait_mask
);
3735 FD_ZERO (&non_keyboard_wait_mask
);
3736 max_process_desc
= 0;
3738 FD_SET (0, &input_wait_mask
);
3740 Vprocess_alist
= Qnil
;
3741 for (i
= 0; i
< MAXDESC
; i
++)
3743 chan_process
[i
] = Qnil
;
3744 proc_buffered_char
[i
] = -1;
3751 stream_process
= intern ("stream");
3753 Qprocessp
= intern ("processp");
3754 staticpro (&Qprocessp
);
3755 Qrun
= intern ("run");
3757 Qstop
= intern ("stop");
3759 Qsignal
= intern ("signal");
3760 staticpro (&Qsignal
);
3762 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
3765 Qexit = intern ("exit");
3766 staticpro (&Qexit); */
3768 Qopen
= intern ("open");
3770 Qclosed
= intern ("closed");
3771 staticpro (&Qclosed
);
3773 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
3774 staticpro (&Qlast_nonmenu_event
);
3776 staticpro (&Vprocess_alist
);
3778 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
3779 "*Non-nil means delete processes immediately when they exit.\n\
3780 nil means don't delete them until `list-processes' is run.");
3782 delete_exited_processes
= 1;
3784 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
3785 "Control type of device used to communicate with subprocesses.\n\
3786 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
3787 The value has no effect if the system has no ptys or if all ptys are busy:\n\
3788 then a pipe is used in any case.\n\
3789 The value takes effect when `start-process' is called.");
3790 Vprocess_connection_type
= Qt
;
3792 defsubr (&Sprocessp
);
3793 defsubr (&Sget_process
);
3794 defsubr (&Sget_buffer_process
);
3795 defsubr (&Sdelete_process
);
3796 defsubr (&Sprocess_status
);
3797 defsubr (&Sprocess_exit_status
);
3798 defsubr (&Sprocess_id
);
3799 defsubr (&Sprocess_name
);
3800 defsubr (&Sprocess_tty_name
);
3801 defsubr (&Sprocess_command
);
3802 defsubr (&Sset_process_buffer
);
3803 defsubr (&Sprocess_buffer
);
3804 defsubr (&Sprocess_mark
);
3805 defsubr (&Sset_process_filter
);
3806 defsubr (&Sprocess_filter
);
3807 defsubr (&Sset_process_sentinel
);
3808 defsubr (&Sprocess_sentinel
);
3809 defsubr (&Sset_process_window_size
);
3810 defsubr (&Sprocess_kill_without_query
);
3811 defsubr (&Sprocess_contact
);
3812 defsubr (&Slist_processes
);
3813 defsubr (&Sprocess_list
);
3814 defsubr (&Sstart_process
);
3816 defsubr (&Sopen_network_stream
);
3817 #endif /* HAVE_SOCKETS */
3818 defsubr (&Saccept_process_output
);
3819 defsubr (&Sprocess_send_region
);
3820 defsubr (&Sprocess_send_string
);
3821 defsubr (&Sinterrupt_process
);
3822 defsubr (&Skill_process
);
3823 defsubr (&Squit_process
);
3824 defsubr (&Sstop_process
);
3825 defsubr (&Scontinue_process
);
3826 defsubr (&Sprocess_send_eof
);
3827 defsubr (&Ssignal_process
);
3828 defsubr (&Swaiting_for_user_input_p
);
3829 /* defsubr (&Sprocess_connection); */
3833 #else /* not subprocesses */
3835 #include <sys/types.h>
3839 #include "systime.h"
3840 #include "termopts.h"
3841 #include "sysselect.h"
3843 extern int frame_garbaged
;
3845 extern EMACS_TIME
timer_check ();
3846 extern int timers_run
;
3848 /* As described above, except assuming that there are no subprocesses:
3850 Wait for timeout to elapse and/or keyboard input to be available.
3853 timeout in seconds, or
3854 zero for no limit, or
3855 -1 means gobble data immediately available but don't wait for any.
3857 read_kbd is a Lisp_Object:
3858 0 to ignore keyboard input, or
3859 1 to return when input is available, or
3860 -1 means caller will actually read the input, so don't throw to
3862 a cons cell, meaning wait until its car is non-nil
3863 (and gobble terminal input into the buffer if any arrives), or
3864 We know that read_kbd will never be a Lisp_Process, since
3865 `subprocesses' isn't defined.
3867 do_display != 0 means redisplay should be done to show subprocess
3868 output that arrives.
3870 Return true iff we received input from any process. */
3873 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
3874 int time_limit
, microsecs
;
3875 Lisp_Object read_kbd
;
3878 EMACS_TIME end_time
, timeout
;
3879 SELECT_TYPE waitchannels
;
3881 Lisp_Object
*wait_for_cell
= 0;
3883 /* If waiting for non-nil in a cell, record where. */
3884 if (CONSP (read_kbd
))
3886 wait_for_cell
= &XCONS (read_kbd
)->car
;
3887 XSETFASTINT (read_kbd
, 0);
3890 /* What does time_limit really mean? */
3891 if (time_limit
|| microsecs
)
3893 if (time_limit
== -1)
3894 /* In fact, it's zero. */
3895 EMACS_SET_SECS_USECS (timeout
, 0, 0);
3897 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
3899 /* How far in the future is that? */
3900 EMACS_GET_TIME (end_time
);
3901 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
3904 /* It's infinite. */
3905 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
3907 /* Turn off periodic alarms (in case they are in use)
3908 because the select emulator uses alarms. */
3914 int timeout_reduced_for_timers
= 0;
3916 /* If calling from keyboard input, do not quit
3917 since we want to return C-g as an input character.
3918 Otherwise, do pending quit if requested. */
3919 if (XINT (read_kbd
) >= 0)
3922 /* Exit now if the cell we're waiting for became non-nil. */
3923 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
3926 /* Compute time from now till when time limit is up */
3927 /* Exit if already run out */
3928 if (time_limit
> 0 || microsecs
)
3930 EMACS_GET_TIME (timeout
);
3931 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
3932 if (EMACS_TIME_NEG_P (timeout
))
3936 /* If our caller will not immediately handle keyboard events,
3937 run timer events directly.
3938 (Callers that will immediately read keyboard events
3939 call timer_delay on their own.) */
3940 if (! wait_for_cell
)
3942 EMACS_TIME timer_delay
;
3946 old_timers_run
= timers_run
;
3947 timer_delay
= timer_check (1);
3948 if (timers_run
!= old_timers_run
&& do_display
)
3950 redisplay_preserve_echo_area ();
3951 /* We must retry, since a timer may have requeued itself
3952 and that could alter the time delay. */
3956 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
3958 EMACS_TIME difference
;
3959 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
3960 if (EMACS_TIME_NEG_P (difference
))
3962 timeout
= timer_delay
;
3963 timeout_reduced_for_timers
= 1;
3968 /* Cause C-g and alarm signals to take immediate action,
3969 and cause input available signals to zero out timeout. */
3970 if (XINT (read_kbd
) < 0)
3971 set_waiting_for_input (&timeout
);
3973 /* Wait till there is something to do. */
3975 if (! XINT (read_kbd
) && wait_for_cell
== 0)
3976 FD_ZERO (&waitchannels
);
3978 FD_SET (0, &waitchannels
);
3980 /* If a frame has been newly mapped and needs updating,
3981 reprocess its display stuff. */
3982 if (frame_garbaged
&& do_display
)
3984 clear_waiting_for_input ();
3985 redisplay_preserve_echo_area ();
3986 if (XINT (read_kbd
) < 0)
3987 set_waiting_for_input (&timeout
);
3990 if (XINT (read_kbd
) && detect_input_pending ())
3993 FD_ZERO (&waitchannels
);
3996 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
4001 /* Make C-g and alarm signals set flags again */
4002 clear_waiting_for_input ();
4004 /* If we woke up due to SIGWINCH, actually change size now. */
4005 do_pending_window_change ();
4007 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4008 /* We waited the full specified time, so return now. */
4013 /* If the system call was interrupted, then go around the
4015 if (xerrno
== EINTR
)
4016 FD_ZERO (&waitchannels
);
4018 error ("select error: %s", strerror (xerrno
));
4021 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
4022 /* System sometimes fails to deliver SIGIO. */
4023 kill (getpid (), SIGIO
);
4026 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
4027 kill (getpid (), SIGIO
);
4030 /* Check for keyboard input */
4032 if ((XINT (read_kbd
) != 0)
4033 && detect_input_pending_run_timers (do_display
))
4035 swallow_events (do_display
);
4036 if (detect_input_pending_run_timers (do_display
))
4040 /* If wait_for_cell. check for keyboard input
4041 but don't run any timers.
4042 ??? (It seems wrong to me to check for keyboard
4043 input at all when wait_for_cell, but the code
4044 has been this way since July 1994.
4045 Try changing this after version 19.31.) */
4047 && detect_input_pending ())
4049 swallow_events (do_display
);
4050 if (detect_input_pending ())
4054 /* Exit now if the cell we're waiting for became non-nil. */
4055 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
4065 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
4066 /* Don't confuse make-docfile by having two doc strings for this function.
4067 make-docfile does not pay attention to #if, for good reason! */
4070 register Lisp_Object name
;
4075 /* Kill all processes associated with `buffer'.
4076 If `buffer' is nil, kill all processes.
4077 Since we have no subprocesses, this does nothing. */
4079 kill_buffer_processes (buffer
)
4090 defsubr (&Sget_buffer_process
);
4094 #endif /* not subprocesses */