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)
1450 #if !(defined (HAVE_SETSID) && defined (TIOCSCTTY))
1451 /*** There is a suggestion that this ought to be a
1452 conditional on TIOCSPGRP. */
1453 /* Now close the pty (if we had it open) and reopen it.
1454 This makes the pty the controlling terminal of the subprocess. */
1457 #ifdef SET_CHILD_PTY_PGRP
1458 int pgrp
= getpid ();
1461 /* I wonder if close (open (pty_name, ...)) would work? */
1464 xforkout
= xforkin
= open (pty_name
, O_RDWR
, 0);
1468 write (1, "Couldn't open the pty terminal ", 31);
1469 write (1, pty_name
, strlen (pty_name
));
1474 #ifdef SET_CHILD_PTY_PGRP
1475 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1476 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1479 #endif /* not (HAVE_SETSID and TIOCSCTTY) */
1480 #endif /* not UNIPLUS and not RTU */
1482 #ifdef SETUP_SLAVE_PTY
1487 #endif /* SETUP_SLAVE_PTY */
1489 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1490 Now reenable it in the child, so it will die when we want it to. */
1492 signal (SIGHUP
, SIG_DFL
);
1494 #endif /* HAVE_PTYS */
1496 signal (SIGINT
, SIG_DFL
);
1497 signal (SIGQUIT
, SIG_DFL
);
1499 /* Stop blocking signals in the child. */
1500 #ifdef POSIX_SIGNALS
1501 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1502 #else /* !POSIX_SIGNALS */
1506 #else /* not BSD4_1 */
1507 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1508 sigsetmask (SIGEMPTYMASK
);
1509 #else /* ordinary USG */
1511 signal (SIGCHLD
, sigchld
);
1513 #endif /* ordinary USG */
1514 #endif /* not BSD4_1 */
1515 #endif /* SIGCHLD */
1516 #endif /* !POSIX_SIGNALS */
1519 child_setup_tty (xforkout
);
1521 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1522 new_argv
, 1, current_dir
);
1523 #else /* not WINDOWSNT */
1524 child_setup (xforkin
, xforkout
, xforkout
,
1525 new_argv
, 1, current_dir
);
1526 #endif /* not WINDOWSNT */
1528 environ
= save_environ
;
1531 /* This runs in the Emacs process. */
1536 if (forkin
!= forkout
&& forkout
>= 0)
1541 /* vfork succeeded. */
1542 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
1545 register_child (pid
, inchannel
);
1546 #endif /* WINDOWSNT */
1548 /* If the subfork execv fails, and it exits,
1549 this close hangs. I don't know why.
1550 So have an interrupt jar it loose. */
1552 signal (SIGALRM
, create_process_1
);
1554 XPROCESS (process
)->subtty
= Qnil
;
1559 if (forkin
!= forkout
&& forkout
>= 0)
1564 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1567 XPROCESS (process
)->tty_name
= Qnil
;
1570 /* Restore the signal state whether vfork succeeded or not.
1571 (We will signal an error, below, if it failed.) */
1572 #ifdef POSIX_SIGNALS
1574 /* Restore the parent's signal handlers. */
1575 sigaction (SIGINT
, &sigint_action
, 0);
1576 sigaction (SIGQUIT
, &sigquit_action
, 0);
1578 sigaction (SIGHUP
, &sighup_action
, 0);
1580 #endif /* HAVE_VFORK */
1581 /* Stop blocking signals in the parent. */
1582 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1583 #else /* !POSIX_SIGNALS */
1587 #else /* not BSD4_1 */
1588 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1589 sigsetmask (SIGEMPTYMASK
);
1590 #else /* ordinary USG */
1592 signal (SIGCHLD
, sigchld
);
1593 /* Now really handle any of these signals
1594 that came in during this function. */
1595 if (sigchld_deferred
)
1596 kill (getpid (), SIGCHLD
);
1598 #endif /* ordinary USG */
1599 #endif /* not BSD4_1 */
1600 #endif /* SIGCHLD */
1601 #endif /* !POSIX_SIGNALS */
1603 /* Now generate the error if vfork failed. */
1605 report_file_error ("Doing vfork", Qnil
);
1607 #endif /* not VMS */
1611 /* open a TCP network connection to a given HOST/SERVICE. Treated
1612 exactly like a normal process when reading and writing. Only
1613 differences are in status display and process deletion. A network
1614 connection has no PID; you cannot signal it. All you can do is
1615 deactivate and close it via delete-process */
1617 DEFUN ("open-network-stream", Fopen_network_stream
, Sopen_network_stream
,
1619 "Open a TCP connection for a service to a host.\n\
1620 Returns a subprocess-object to represent the connection.\n\
1621 Input and output work as for subprocesses; `delete-process' closes it.\n\
1622 Args are NAME BUFFER HOST SERVICE.\n\
1623 NAME is name for process. It is modified if necessary to make it unique.\n\
1624 BUFFER is the buffer (or buffer-name) to associate with the process.\n\
1625 Process output goes at end of that buffer, unless you specify\n\
1626 an output stream or filter function to handle the output.\n\
1627 BUFFER may be also nil, meaning that this process is not associated\n\
1629 Third arg is name of the host to connect to, or its IP address.\n\
1630 Fourth arg SERVICE is name of the service desired, or an integer\n\
1631 specifying a port number to connect to.")
1632 (name
, buffer
, host
, service
)
1633 Lisp_Object name
, buffer
, host
, service
;
1637 struct sockaddr_in address
;
1638 struct servent
*svc_info
;
1639 struct hostent
*host_info_ptr
, host_info
;
1640 char *(addr_list
[2]);
1641 IN_ADDR numeric_addr
;
1645 struct hostent host_info_fixed
;
1646 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1648 int count
= specpdl_ptr
- specpdl
;
1651 /* Ensure socket support is loaded if available. */
1652 init_winsock (TRUE
);
1655 GCPRO4 (name
, buffer
, host
, service
);
1656 CHECK_STRING (name
, 0);
1657 CHECK_STRING (host
, 0);
1658 if (INTEGERP (service
))
1659 port
= htons ((unsigned short) XINT (service
));
1662 CHECK_STRING (service
, 0);
1663 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
1665 error ("Unknown service \"%s\"", XSTRING (service
)->data
);
1666 port
= svc_info
->s_port
;
1669 /* Slow down polling to every ten seconds.
1670 Some kernels have a bug which causes retrying connect to fail
1671 after a connect. Polling can interfere with gethostbyname too. */
1672 #ifdef POLL_FOR_INPUT
1673 bind_polling_period (10);
1684 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
1687 if (! (host_info_ptr
== 0 && h_errno
== TRY_AGAIN
))
1690 Fsleep_for (make_number (1), Qnil
);
1692 if (host_info_ptr
== 0)
1693 /* Attempt to interpret host as numeric inet address */
1695 numeric_addr
= inet_addr ((char *) XSTRING (host
)->data
);
1696 if (NUMERIC_ADDR_ERROR
)
1697 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
1699 host_info_ptr
= &host_info
;
1700 host_info
.h_name
= 0;
1701 host_info
.h_aliases
= 0;
1702 host_info
.h_addrtype
= AF_INET
;
1704 /* Older machines have only one address slot called h_addr.
1705 Newer machines have h_addr_list, but #define h_addr to
1706 be its first element. */
1707 host_info
.h_addr_list
= &(addr_list
[0]);
1709 host_info
.h_addr
= (char*)(&numeric_addr
);
1711 /* numeric_addr isn't null-terminated; it has fixed length. */
1712 host_info
.h_length
= sizeof (numeric_addr
);
1715 bzero (&address
, sizeof address
);
1716 bcopy (host_info_ptr
->h_addr
, (char *) &address
.sin_addr
,
1717 host_info_ptr
->h_length
);
1718 address
.sin_family
= host_info_ptr
->h_addrtype
;
1719 address
.sin_port
= port
;
1721 s
= socket (host_info_ptr
->h_addrtype
, SOCK_STREAM
, 0);
1723 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1725 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
1726 when connect is interrupted. So let's not let it get interrupted.
1727 Note we do not turn off polling, because polling is only used
1728 when not interrupt_input, and thus not normally used on the systems
1729 which have this bug. On systems which use polling, there's no way
1730 to quit if polling is turned off. */
1731 if (interrupt_input
)
1739 if (connect (s
, (struct sockaddr
*) &address
, sizeof address
) == -1
1740 && errno
!= EISCONN
)
1748 if (errno
== EADDRINUSE
&& retry
< 20)
1750 /* A delay here is needed on some FreeBSD systems,
1751 and it is harmless, since this retrying takes time anyway
1752 and should be infrequent. */
1753 Fsleep_for (make_number (1), Qnil
);
1760 if (interrupt_input
)
1764 report_file_error ("connection failed",
1765 Fcons (host
, Fcons (name
, Qnil
)));
1770 #ifdef POLL_FOR_INPUT
1771 unbind_to (count
, Qnil
);
1774 if (interrupt_input
)
1778 s
= connect_server (0);
1780 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1781 send_command (s
, C_PORT
, 0, "%s:%d", XSTRING (host
)->data
, ntohs (port
));
1782 send_command (s
, C_DUMB
, 1, 0);
1788 report_file_error ("error duplicating socket", Fcons (name
, Qnil
));
1791 buffer
= Fget_buffer_create (buffer
);
1792 proc
= make_process (name
);
1794 chan_process
[inch
] = proc
;
1797 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
1800 fcntl (inch
, F_SETFL
, O_NDELAY
);
1804 XPROCESS (proc
)->childp
= Fcons (host
, Fcons (service
, Qnil
));
1805 XPROCESS (proc
)->command_channel_p
= Qnil
;
1806 XPROCESS (proc
)->buffer
= buffer
;
1807 XPROCESS (proc
)->sentinel
= Qnil
;
1808 XPROCESS (proc
)->filter
= Qnil
;
1809 XPROCESS (proc
)->command
= Qnil
;
1810 XPROCESS (proc
)->pid
= Qnil
;
1811 XSETINT (XPROCESS (proc
)->infd
, inch
);
1812 XSETINT (XPROCESS (proc
)->outfd
, outch
);
1813 XPROCESS (proc
)->status
= Qrun
;
1814 FD_SET (inch
, &input_wait_mask
);
1815 FD_SET (inch
, &non_keyboard_wait_mask
);
1816 if (inch
> max_process_desc
)
1817 max_process_desc
= inch
;
1822 #endif /* HAVE_SOCKETS */
1824 deactivate_process (proc
)
1827 register int inchannel
, outchannel
;
1828 register struct Lisp_Process
*p
= XPROCESS (proc
);
1830 inchannel
= XINT (p
->infd
);
1831 outchannel
= XINT (p
->outfd
);
1835 /* Beware SIGCHLD hereabouts. */
1836 flush_pending_output (inchannel
);
1839 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
1840 sys$
dassgn (outchannel
);
1841 vs
= get_vms_process_pointer (p
->pid
);
1843 give_back_vms_process_stuff (vs
);
1847 if (outchannel
>= 0 && outchannel
!= inchannel
)
1851 XSETINT (p
->infd
, -1);
1852 XSETINT (p
->outfd
, -1);
1853 chan_process
[inchannel
] = Qnil
;
1854 FD_CLR (inchannel
, &input_wait_mask
);
1855 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
1856 if (inchannel
== max_process_desc
)
1859 /* We just closed the highest-numbered process input descriptor,
1860 so recompute the highest-numbered one now. */
1861 max_process_desc
= 0;
1862 for (i
= 0; i
< MAXDESC
; i
++)
1863 if (!NILP (chan_process
[i
]))
1864 max_process_desc
= i
;
1869 /* Close all descriptors currently in use for communication
1870 with subprocess. This is used in a newly-forked subprocess
1871 to get rid of irrelevant descriptors. */
1873 close_process_descs ()
1877 for (i
= 0; i
< MAXDESC
; i
++)
1879 Lisp_Object process
;
1880 process
= chan_process
[i
];
1881 if (!NILP (process
))
1883 int in
= XINT (XPROCESS (process
)->infd
);
1884 int out
= XINT (XPROCESS (process
)->outfd
);
1887 if (out
>= 0 && in
!= out
)
1894 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
1896 "Allow any pending output from subprocesses to be read by Emacs.\n\
1897 It is read into the process' buffers or given to their filter functions.\n\
1898 Non-nil arg PROCESS means do not return until some output has been received\n\
1900 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
1901 seconds and microseconds to wait; return after that much time whether\n\
1902 or not there is input.\n\
1903 Return non-nil iff we received any output before the timeout expired.")
1904 (process
, timeout
, timeout_msecs
)
1905 register Lisp_Object process
, timeout
, timeout_msecs
;
1910 if (! NILP (timeout_msecs
))
1912 CHECK_NUMBER (timeout_msecs
, 2);
1913 useconds
= XINT (timeout_msecs
);
1914 if (!INTEGERP (timeout
))
1915 XSETINT (timeout
, 0);
1918 int carry
= useconds
/ 1000000;
1920 XSETINT (timeout
, XINT (timeout
) + carry
);
1921 useconds
-= carry
* 1000000;
1923 /* I think this clause is necessary because C doesn't
1924 guarantee a particular rounding direction for negative
1928 XSETINT (timeout
, XINT (timeout
) - 1);
1929 useconds
+= 1000000;
1936 if (! NILP (timeout
))
1938 CHECK_NUMBER (timeout
, 1);
1939 seconds
= XINT (timeout
);
1940 if (seconds
< 0 || (seconds
== 0 && useconds
== 0))
1952 XSETFASTINT (process
, 0);
1955 (wait_reading_process_input (seconds
, useconds
, process
, 0)
1959 /* This variable is different from waiting_for_input in keyboard.c.
1960 It is used to communicate to a lisp process-filter/sentinel (via the
1961 function Fwaiting_for_user_input_p below) whether emacs was waiting
1962 for user-input when that process-filter was called.
1963 waiting_for_input cannot be used as that is by definition 0 when
1964 lisp code is being evalled.
1965 This is also used in record_asynch_buffer_change.
1966 For that purpose, this must be 0
1967 when not inside wait_reading_process_input. */
1968 static int waiting_for_user_input_p
;
1970 /* This is here so breakpoints can be put on it. */
1972 wait_reading_process_input_1 ()
1976 /* Read and dispose of subprocess output while waiting for timeout to
1977 elapse and/or keyboard input to be available.
1980 timeout in seconds, or
1981 zero for no limit, or
1982 -1 means gobble data immediately available but don't wait for any.
1985 an additional duration to wait, measured in microseconds.
1986 If this is nonzero and time_limit is 0, then the timeout
1987 consists of MICROSECS only.
1989 READ_KBD is a lisp value:
1990 0 to ignore keyboard input, or
1991 1 to return when input is available, or
1992 -1 meaning caller will actually read the input, so don't throw to
1993 the quit handler, or
1994 a cons cell, meaning wait until its car is non-nil
1995 (and gobble terminal input into the buffer if any arrives), or
1996 a process object, meaning wait until something arrives from that
1997 process. The return value is true iff we read some input from
2000 DO_DISPLAY != 0 means redisplay should be done to show subprocess
2001 output that arrives.
2003 If READ_KBD is a pointer to a struct Lisp_Process, then the
2004 function returns true iff we received input from that process
2005 before the timeout elapsed.
2006 Otherwise, return true iff we received input from any process. */
2008 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
2009 int time_limit
, microsecs
;
2010 Lisp_Object read_kbd
;
2013 register int channel
, nfds
, m
;
2014 static SELECT_TYPE Available
;
2017 EMACS_TIME timeout
, end_time
, garbage
;
2019 int wait_channel
= -1;
2020 struct Lisp_Process
*wait_proc
= 0;
2021 int got_some_input
= 0;
2022 Lisp_Object
*wait_for_cell
= 0;
2024 FD_ZERO (&Available
);
2026 /* If read_kbd is a process to watch, set wait_proc and wait_channel
2028 if (PROCESSP (read_kbd
))
2030 wait_proc
= XPROCESS (read_kbd
);
2031 wait_channel
= XINT (wait_proc
->infd
);
2032 XSETFASTINT (read_kbd
, 0);
2035 /* If waiting for non-nil in a cell, record where. */
2036 if (CONSP (read_kbd
))
2038 wait_for_cell
= &XCONS (read_kbd
)->car
;
2039 XSETFASTINT (read_kbd
, 0);
2042 waiting_for_user_input_p
= XINT (read_kbd
);
2044 /* Since we may need to wait several times,
2045 compute the absolute time to return at. */
2046 if (time_limit
|| microsecs
)
2048 EMACS_GET_TIME (end_time
);
2049 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
2050 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
2053 /* AlainF 5-Jul-1996
2054 HP-UX 10.10 seem to have problems with signals coming in
2055 Causes "poll: interrupted system call" messages when Emacs is run
2057 Turn off periodic alarms (in case they are in use) */
2063 int timeout_reduced_for_timers
= 0;
2065 /* If calling from keyboard input, do not quit
2066 since we want to return C-g as an input character.
2067 Otherwise, do pending quit if requested. */
2068 if (XINT (read_kbd
) >= 0)
2071 /* Exit now if the cell we're waiting for became non-nil. */
2072 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2075 /* Compute time from now till when time limit is up */
2076 /* Exit if already run out */
2077 if (time_limit
== -1)
2079 /* -1 specified for timeout means
2080 gobble output available now
2081 but don't wait at all. */
2083 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2085 else if (time_limit
|| microsecs
)
2087 EMACS_GET_TIME (timeout
);
2088 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
2089 if (EMACS_TIME_NEG_P (timeout
))
2094 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
2097 /* Normally we run timers here.
2098 But not if wait_for_cell; in those cases,
2099 the wait is supposed to be short,
2100 and those callers cannot handle running arbitrary Lisp code here. */
2101 if (! wait_for_cell
)
2103 EMACS_TIME timer_delay
;
2107 old_timers_run
= timers_run
;
2108 timer_delay
= timer_check (1);
2109 if (timers_run
!= old_timers_run
&& do_display
)
2111 redisplay_preserve_echo_area ();
2112 /* We must retry, since a timer may have requeued itself
2113 and that could alter the time_delay. */
2117 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
2119 EMACS_TIME difference
;
2120 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
2121 if (EMACS_TIME_NEG_P (difference
))
2123 timeout
= timer_delay
;
2124 timeout_reduced_for_timers
= 1;
2127 /* If time_limit is -1, we are not going to wait at all. */
2128 else if (time_limit
!= -1)
2130 /* This is so a breakpoint can be put here. */
2131 wait_reading_process_input_1 ();
2135 /* Cause C-g and alarm signals to take immediate action,
2136 and cause input available signals to zero out timeout.
2138 It is important that we do this before checking for process
2139 activity. If we get a SIGCHLD after the explicit checks for
2140 process activity, timeout is the only way we will know. */
2141 if (XINT (read_kbd
) < 0)
2142 set_waiting_for_input (&timeout
);
2144 /* If status of something has changed, and no input is
2145 available, notify the user of the change right away. After
2146 this explicit check, we'll let the SIGCHLD handler zap
2147 timeout to get our attention. */
2148 if (update_tick
!= process_tick
&& do_display
)
2150 Atemp
= input_wait_mask
;
2151 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2152 if ((select (MAXDESC
, &Atemp
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2156 /* It's okay for us to do this and then continue with
2157 the loop, since timeout has already been zeroed out. */
2158 clear_waiting_for_input ();
2163 /* Don't wait for output from a non-running process. */
2164 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
2165 update_status (wait_proc
);
2167 && ! EQ (wait_proc
->status
, Qrun
))
2169 clear_waiting_for_input ();
2173 /* Wait till there is something to do */
2175 if (! XINT (read_kbd
) && wait_for_cell
== 0)
2176 Available
= non_keyboard_wait_mask
;
2178 Available
= input_wait_mask
;
2180 /* If frame size has changed or the window is newly mapped,
2181 redisplay now, before we start to wait. There is a race
2182 condition here; if a SIGIO arrives between now and the select
2183 and indicates that a frame is trashed, the select may block
2184 displaying a trashed screen. */
2185 if (frame_garbaged
&& do_display
)
2187 clear_waiting_for_input ();
2188 redisplay_preserve_echo_area ();
2189 if (XINT (read_kbd
) < 0)
2190 set_waiting_for_input (&timeout
);
2193 if (XINT (read_kbd
) && detect_input_pending ())
2196 FD_ZERO (&Available
);
2199 nfds
= select (MAXDESC
, &Available
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2204 /* Make C-g and alarm signals set flags again */
2205 clear_waiting_for_input ();
2207 /* If we woke up due to SIGWINCH, actually change size now. */
2208 do_pending_window_change ();
2210 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
2211 /* We wanted the full specified time, so return now. */
2215 if (xerrno
== EINTR
)
2216 FD_ZERO (&Available
);
2218 /* Ultrix select seems to return ENOMEM when it is
2219 interrupted. Treat it just like EINTR. Bleah. Note
2220 that we want to test for the "ultrix" CPP symbol, not
2221 "__ultrix__"; the latter is only defined under GCC, but
2222 not by DEC's bundled CC. -JimB */
2223 else if (xerrno
== ENOMEM
)
2224 FD_ZERO (&Available
);
2227 /* This happens for no known reason on ALLIANT.
2228 I am guessing that this is the right response. -- RMS. */
2229 else if (xerrno
== EFAULT
)
2230 FD_ZERO (&Available
);
2232 else if (xerrno
== EBADF
)
2235 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
2236 the child's closure of the pts gives the parent a SIGHUP, and
2237 the ptc file descriptor is automatically closed,
2238 yielding EBADF here or at select() call above.
2239 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
2240 in m/ibmrt-aix.h), and here we just ignore the select error.
2241 Cleanup occurs c/o status_notify after SIGCLD. */
2242 FD_ZERO (&Available
); /* Cannot depend on values returned */
2248 error ("select error: %s", strerror (xerrno
));
2250 #if defined(sun) && !defined(USG5_4)
2251 else if (nfds
> 0 && keyboard_bit_set (&Available
)
2253 /* System sometimes fails to deliver SIGIO.
2255 David J. Mackenzie says that Emacs doesn't compile under
2256 Solaris if this code is enabled, thus the USG5_4 in the CPP
2257 conditional. "I haven't noticed any ill effects so far.
2258 If you find a Solaris expert somewhere, they might know
2260 kill (getpid (), SIGIO
);
2263 /* Check for keyboard input */
2264 /* If there is any, return immediately
2265 to give it higher priority than subprocesses */
2267 if ((XINT (read_kbd
) != 0)
2268 && detect_input_pending_run_timers (do_display
))
2270 swallow_events (do_display
);
2271 if (detect_input_pending_run_timers (do_display
))
2275 /* If wait_for_cell. check for keyboard input
2276 but don't run any timers.
2277 ??? (It seems wrong to me to check for keyboard
2278 input at all when wait_for_cell, but the code
2279 has been this way since July 1994.
2280 Try changing this after version 19.31.) */
2282 && detect_input_pending ())
2284 swallow_events (do_display
);
2285 if (detect_input_pending ())
2289 /* Exit now if the cell we're waiting for became non-nil. */
2290 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2294 /* If we think we have keyboard input waiting, but didn't get SIGIO
2295 go read it. This can happen with X on BSD after logging out.
2296 In that case, there really is no input and no SIGIO,
2297 but select says there is input. */
2299 if (XINT (read_kbd
) && interrupt_input
2300 && (keyboard_bit_set (&Available
)))
2301 kill (getpid (), SIGIO
);
2305 got_some_input
|= nfds
> 0;
2307 /* If checking input just got us a size-change event from X,
2308 obey it now if we should. */
2309 if (XINT (read_kbd
) || wait_for_cell
)
2310 do_pending_window_change ();
2312 /* Check for data from a process. */
2313 /* Really FIRST_PROC_DESC should be 0 on Unix,
2314 but this is safer in the short run. */
2315 for (channel
= 0; channel
<= max_process_desc
; channel
++)
2317 if (FD_ISSET (channel
, &Available
)
2318 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
2322 /* If waiting for this channel, arrange to return as
2323 soon as no more input to be processed. No more
2325 if (wait_channel
== channel
)
2331 proc
= chan_process
[channel
];
2335 /* Read data from the process, starting with our
2336 buffered-ahead character if we have one. */
2338 nread
= read_process_output (proc
, channel
);
2341 /* Since read_process_output can run a filter,
2342 which can call accept-process-output,
2343 don't try to read from any other processes
2344 before doing the select again. */
2345 FD_ZERO (&Available
);
2348 redisplay_preserve_echo_area ();
2351 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2354 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
2355 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
2357 else if (nread
== -1 && errno
== EAGAIN
)
2361 else if (nread
== -1 && errno
== EAGAIN
)
2363 /* Note that we cannot distinguish between no input
2364 available now and a closed pipe.
2365 With luck, a closed pipe will be accompanied by
2366 subprocess termination and SIGCHLD. */
2367 else if (nread
== 0 && !NETCONN_P (proc
))
2369 #endif /* O_NDELAY */
2370 #endif /* O_NONBLOCK */
2372 /* On some OSs with ptys, when the process on one end of
2373 a pty exits, the other end gets an error reading with
2374 errno = EIO instead of getting an EOF (0 bytes read).
2375 Therefore, if we get an error reading and errno =
2376 EIO, just continue, because the child process has
2377 exited and should clean itself up soon (e.g. when we
2379 else if (nread
== -1 && errno
== EIO
)
2381 #endif /* HAVE_PTYS */
2382 /* If we can detect process termination, don't consider the process
2383 gone just because its pipe is closed. */
2385 else if (nread
== 0 && !NETCONN_P (proc
))
2390 /* Preserve status of processes already terminated. */
2391 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2392 deactivate_process (proc
);
2393 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2394 update_status (XPROCESS (proc
));
2395 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2396 XPROCESS (proc
)->status
2397 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2400 } /* end for each file descriptor */
2401 } /* end while exit conditions not met */
2403 waiting_for_user_input_p
= 0;
2405 /* If calling from keyboard input, do not quit
2406 since we want to return C-g as an input character.
2407 Otherwise, do pending quit if requested. */
2408 if (XINT (read_kbd
) >= 0)
2410 /* Prevent input_pending from remaining set if we quit. */
2411 clear_input_pending ();
2415 /* AlainF 5-Jul-1996
2416 HP-UX 10.10 seems to have problems with signals coming in
2417 Causes "poll: interrupted system call" messages when Emacs is run
2419 Turn periodic alarms back on */
2423 return got_some_input
;
2426 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
2429 read_process_output_call (fun_and_args
)
2430 Lisp_Object fun_and_args
;
2432 return apply1 (XCONS (fun_and_args
)->car
, XCONS (fun_and_args
)->cdr
);
2436 read_process_output_error_handler (error
)
2439 cmd_error_internal (error
, "error in process filter: ");
2441 update_echo_area ();
2442 Fsleep_for (make_number (2), Qnil
);
2445 /* Read pending output from the process channel,
2446 starting with our buffered-ahead character if we have one.
2447 Yield number of characters read.
2449 This function reads at most 1024 characters.
2450 If you want to read all available subprocess output,
2451 you must call it repeatedly until it returns zero. */
2453 read_process_output (proc
, channel
)
2455 register int channel
;
2457 register int nchars
;
2463 register Lisp_Object outstream
;
2464 register struct buffer
*old
= current_buffer
;
2465 register struct Lisp_Process
*p
= XPROCESS (proc
);
2466 register int opoint
;
2469 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2471 vs
= get_vms_process_pointer (p
->pid
);
2475 return(0); /* Really weird if it does this */
2476 if (!(vs
->iosb
[0] & 1))
2477 return -1; /* I/O error */
2480 error ("Could not get VMS process pointer");
2481 chars
= vs
->inputBuffer
;
2482 nchars
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2485 start_vms_process_read (vs
); /* Crank up the next read on the process */
2486 return 1; /* Nothing worth printing, say we got 1 */
2490 if (proc_buffered_char
[channel
] < 0)
2491 nchars
= read (channel
, chars
, sizeof (chars
));
2494 chars
[0] = proc_buffered_char
[channel
];
2495 proc_buffered_char
[channel
] = -1;
2496 nchars
= read (channel
, chars
+ 1, sizeof (chars
) - 1);
2500 nchars
= nchars
+ 1;
2502 #endif /* not VMS */
2504 if (nchars
<= 0) return nchars
;
2506 outstream
= p
->filter
;
2507 if (!NILP (outstream
))
2509 /* We inhibit quit here instead of just catching it so that
2510 hitting ^G when a filter happens to be running won't screw
2512 int count
= specpdl_ptr
- specpdl
;
2513 Lisp_Object odeactivate
;
2514 Lisp_Object obuffer
, okeymap
;
2516 /* No need to gcpro these, because all we do with them later
2517 is test them for EQness, and none of them should be a string. */
2518 odeactivate
= Vdeactivate_mark
;
2519 XSETBUFFER (obuffer
, current_buffer
);
2520 okeymap
= current_buffer
->keymap
;
2522 specbind (Qinhibit_quit
, Qt
);
2523 specbind (Qlast_nonmenu_event
, Qt
);
2525 running_asynch_code
= 1;
2526 internal_condition_case_1 (read_process_output_call
,
2529 Fcons (make_string (chars
,
2532 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
2533 read_process_output_error_handler
);
2534 running_asynch_code
= 0;
2535 restore_match_data ();
2537 /* Handling the process output should not deactivate the mark. */
2538 Vdeactivate_mark
= odeactivate
;
2540 #if 0 /* Call record_asynch_buffer_change unconditionally,
2541 because we might have changed minor modes or other things
2542 that affect key bindings. */
2543 if (! EQ (Fcurrent_buffer (), obuffer
)
2544 || ! EQ (current_buffer
->keymap
, okeymap
))
2546 /* But do it only if the caller is actually going to read events.
2547 Otherwise there's no need to make him wake up, and it could
2548 cause trouble (for example it would make Fsit_for return). */
2549 if (waiting_for_user_input_p
== -1)
2550 record_asynch_buffer_change ();
2553 start_vms_process_read (vs
);
2555 unbind_to (count
, Qnil
);
2559 /* If no filter, write into buffer if it isn't dead. */
2560 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2562 Lisp_Object old_read_only
;
2563 Lisp_Object old_begv
, old_zv
;
2564 Lisp_Object odeactivate
;
2566 odeactivate
= Vdeactivate_mark
;
2568 Fset_buffer (p
->buffer
);
2570 old_read_only
= current_buffer
->read_only
;
2571 XSETFASTINT (old_begv
, BEGV
);
2572 XSETFASTINT (old_zv
, ZV
);
2574 current_buffer
->read_only
= Qnil
;
2576 /* Insert new output into buffer
2577 at the current end-of-output marker,
2578 thus preserving logical ordering of input and output. */
2579 if (XMARKER (p
->mark
)->buffer
)
2580 SET_PT (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
));
2584 /* If the output marker is outside of the visible region, save
2585 the restriction and widen. */
2586 if (! (BEGV
<= PT
&& PT
<= ZV
))
2589 /* Make sure opoint floats ahead of any new text, just as point
2594 /* Insert after old_begv, but before old_zv. */
2595 if (PT
< XFASTINT (old_begv
))
2596 XSETFASTINT (old_begv
, XFASTINT (old_begv
) + nchars
);
2597 if (PT
<= XFASTINT (old_zv
))
2598 XSETFASTINT (old_zv
, XFASTINT (old_zv
) + nchars
);
2600 /* Insert before markers in case we are inserting where
2601 the buffer's mark is, and the user's next command is Meta-y. */
2602 insert_before_markers (chars
, nchars
);
2603 Fset_marker (p
->mark
, make_number (PT
), p
->buffer
);
2605 update_mode_lines
++;
2607 /* If the restriction isn't what it should be, set it. */
2608 if (XFASTINT (old_begv
) != BEGV
|| XFASTINT (old_zv
) != ZV
)
2609 Fnarrow_to_region (old_begv
, old_zv
);
2611 /* Handling the process output should not deactivate the mark. */
2612 Vdeactivate_mark
= odeactivate
;
2614 current_buffer
->read_only
= old_read_only
;
2616 set_buffer_internal (old
);
2619 start_vms_process_read (vs
);
2624 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
2626 "Returns non-nil if emacs is waiting for input from the user.\n\
2627 This is intended for use by asynchronous process output filters and sentinels.")
2630 return (waiting_for_user_input_p
? Qt
: Qnil
);
2633 /* Sending data to subprocess */
2635 jmp_buf send_process_frame
;
2638 send_process_trap ()
2644 longjmp (send_process_frame
, 1);
2647 /* Send some data to process PROC.
2648 BUF is the beginning of the data; LEN is the number of characters.
2649 OBJECT is the Lisp object that the data comes from. */
2651 send_process (proc
, buf
, len
, object
)
2652 volatile Lisp_Object proc
;
2657 /* Use volatile to protect variables from being clobbered by longjmp. */
2659 volatile unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
2660 struct gcpro gcpro1
;
2665 struct Lisp_Process
*p
= XPROCESS (proc
);
2666 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2669 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2670 update_status (XPROCESS (proc
));
2671 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2672 error ("Process %s not running", procname
);
2675 vs
= get_vms_process_pointer (p
->pid
);
2677 error ("Could not find this process: %x", p
->pid
);
2678 else if (write_to_vms_process (vs
, buf
, len
))
2682 if (pty_max_bytes
== 0)
2684 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
2685 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
2687 if (pty_max_bytes
< 0)
2688 pty_max_bytes
= 250;
2690 pty_max_bytes
= 250;
2692 /* Deduct one, to leave space for the eof. */
2696 if (!setjmp (send_process_frame
))
2700 SIGTYPE (*old_sigpipe
)();
2703 /* Decide how much data we can send in one batch.
2704 Long lines need to be split into multiple batches. */
2705 if (!NILP (XPROCESS (proc
)->pty_flag
))
2707 /* Starting this at zero is always correct when not the first iteration
2708 because the previous iteration ended by sending C-d.
2709 It may not be correct for the first iteration
2710 if a partial line was sent in a separate send_process call.
2711 If that proves worth handling, we need to save linepos
2712 in the process object. */
2715 char *end
= buf
+ len
;
2717 /* Scan through this text for a line that is too long. */
2718 while (ptr
!= end
&& linepos
< pty_max_bytes
)
2726 /* If we found one, break the line there
2727 and put in a C-d to force the buffer through. */
2731 /* Send this batch, using one or more write calls. */
2734 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
2735 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
2736 signal (SIGPIPE
, old_sigpipe
);
2742 || errno
== EWOULDBLOCK
2748 /* Buffer is full. Wait, accepting input;
2749 that may allow the program
2750 to finish doing output and read more. */
2755 /* Running filters might relocate buffers or strings.
2756 Arrange to relocate BUF. */
2757 if (BUFFERP (object
))
2758 offset
= BUF_PTR_CHAR_POS (XBUFFER (object
),
2759 (unsigned char *) buf
);
2760 else if (STRINGP (object
))
2761 offset
= buf
- (char *) XSTRING (object
)->data
;
2763 XSETFASTINT (zero
, 0);
2764 wait_reading_process_input (1, 0, zero
, 0);
2766 if (BUFFERP (object
))
2767 buf
= (char *) BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
2768 else if (STRINGP (object
))
2769 buf
= offset
+ (char *) XSTRING (object
)->data
;
2774 /* This is a real error. */
2775 report_file_error ("writing to process", Fcons (proc
, Qnil
));
2782 /* If we sent just part of the string, put in an EOF
2783 to force it through, before we send the rest. */
2785 Fprocess_send_eof (proc
);
2790 XPROCESS (proc
)->raw_status_low
= Qnil
;
2791 XPROCESS (proc
)->raw_status_high
= Qnil
;
2792 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2793 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2794 deactivate_process (proc
);
2796 error ("Error writing to process %s; closed it", procname
);
2798 error ("SIGPIPE raised on process %s; closed it", procname
);
2805 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
2807 "Send current contents of region as input to PROCESS.\n\
2808 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2809 nil, indicating the current buffer's process.\n\
2810 Called from program, takes three arguments, PROCESS, START and END.\n\
2811 If the region is more than 500 characters long,\n\
2812 it is sent in several bunches. This may happen even for shorter regions.\n\
2813 Output from processes can arrive in between bunches.")
2814 (process
, start
, end
)
2815 Lisp_Object process
, start
, end
;
2820 proc
= get_process (process
);
2821 validate_region (&start
, &end
);
2823 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
2826 start1
= XINT (start
);
2827 send_process (proc
, &FETCH_CHAR (start1
), XINT (end
) - XINT (start
),
2828 Fcurrent_buffer ());
2833 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
2835 "Send PROCESS the contents of STRING as input.\n\
2836 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2837 nil, indicating the current buffer's process.\n\
2838 If STRING is more than 500 characters long,\n\
2839 it is sent in several bunches. This may happen even for shorter strings.\n\
2840 Output from processes can arrive in between bunches.")
2842 Lisp_Object process
, string
;
2845 CHECK_STRING (string
, 1);
2846 proc
= get_process (process
);
2847 send_process (proc
, XSTRING (string
)->data
, XSTRING (string
)->size
, string
);
2851 /* send a signal number SIGNO to PROCESS.
2852 CURRENT_GROUP means send to the process group that currently owns
2853 the terminal being used to communicate with PROCESS.
2854 This is used for various commands in shell mode.
2855 If NOMSG is zero, insert signal-announcements into process's buffers
2858 If we can, we try to signal PROCESS by sending control characters
2859 down the pty. This allows us to signal inferiors who have changed
2860 their uid, for which killpg would return an EPERM error. */
2863 process_send_signal (process
, signo
, current_group
, nomsg
)
2864 Lisp_Object process
;
2866 Lisp_Object current_group
;
2870 register struct Lisp_Process
*p
;
2874 proc
= get_process (process
);
2875 p
= XPROCESS (proc
);
2877 if (!EQ (p
->childp
, Qt
))
2878 error ("Process %s is not a subprocess",
2879 XSTRING (p
->name
)->data
);
2880 if (XINT (p
->infd
) < 0)
2881 error ("Process %s is not active",
2882 XSTRING (p
->name
)->data
);
2884 if (NILP (p
->pty_flag
))
2885 current_group
= Qnil
;
2887 /* If we are using pgrps, get a pgrp number and make it negative. */
2888 if (!NILP (current_group
))
2890 #ifdef SIGNALS_VIA_CHARACTERS
2891 /* If possible, send signals to the entire pgrp
2892 by sending an input character to it. */
2894 /* TERMIOS is the latest and bestest, and seems most likely to
2895 work. If the system has it, use it. */
2902 tcgetattr (XINT (p
->infd
), &t
);
2903 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2907 tcgetattr (XINT (p
->infd
), &t
);
2908 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2912 tcgetattr (XINT (p
->infd
), &t
);
2913 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
2914 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2916 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
2921 #else /* ! HAVE_TERMIOS */
2923 /* On Berkeley descendants, the following IOCTL's retrieve the
2924 current control characters. */
2925 #if defined (TIOCGLTC) && defined (TIOCGETC)
2933 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2934 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
2937 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2938 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
2942 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
2943 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
2945 #endif /* ! defined (SIGTSTP) */
2948 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2950 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
2957 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2958 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2961 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2962 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2966 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2967 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2969 #endif /* ! defined (SIGTSTP) */
2971 #else /* ! defined (TCGETA) */
2972 Your configuration files are messed up
.
2973 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
2974 you'd better be using one of the alternatives above! */
2975 #endif /* ! defined (TCGETA) */
2976 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2977 #endif /* ! defined HAVE_TERMIOS */
2978 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
2981 /* Get the pgrp using the tty itself, if we have that.
2982 Otherwise, use the pty to get the pgrp.
2983 On pfa systems, saka@pfu.fujitsu.co.JP writes:
2984 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
2985 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
2986 His patch indicates that if TIOCGPGRP returns an error, then
2987 we should just assume that p->pid is also the process group id. */
2991 if (!NILP (p
->subtty
))
2992 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
2994 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
2998 gid
= - XFASTINT (p
->pid
);
2999 #endif /* ! defined (pfa) */
3005 #else /* ! defined (TIOCGPGRP ) */
3006 /* Can't select pgrps on this system, so we know that
3007 the child itself heads the pgrp. */
3008 gid
= - XFASTINT (p
->pid
);
3009 #endif /* ! defined (TIOCGPGRP ) */
3012 gid
= - XFASTINT (p
->pid
);
3018 p
->raw_status_low
= Qnil
;
3019 p
->raw_status_high
= Qnil
;
3021 XSETINT (p
->tick
, ++process_tick
);
3025 #endif /* ! defined (SIGCONT) */
3028 send_process (proc
, "\003", 1, Qnil
); /* ^C */
3033 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
3038 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
3041 flush_pending_output (XINT (p
->infd
));
3045 /* If we don't have process groups, send the signal to the immediate
3046 subprocess. That isn't really right, but it's better than any
3047 obvious alternative. */
3050 kill (XFASTINT (p
->pid
), signo
);
3054 /* gid may be a pid, or minus a pgrp's number */
3056 if (!NILP (current_group
))
3057 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
3060 gid
= - XFASTINT (p
->pid
);
3063 #else /* ! defined (TIOCSIGSEND) */
3064 EMACS_KILLPG (-gid
, signo
);
3065 #endif /* ! defined (TIOCSIGSEND) */
3068 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
3069 "Interrupt process PROCESS. May be process or name of one.\n\
3070 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
3071 nil or no arg means current buffer's process.\n\
3072 Second arg CURRENT-GROUP non-nil means send signal to\n\
3073 the current process-group of the process's controlling terminal\n\
3074 rather than to the process's own process group.\n\
3075 If the process is a shell, this means interrupt current subjob\n\
3076 rather than the shell.")
3077 (process
, current_group
)
3078 Lisp_Object process
, current_group
;
3080 process_send_signal (process
, SIGINT
, current_group
, 0);
3084 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
3085 "Kill process PROCESS. May be process or name of one.\n\
3086 See function `interrupt-process' for more details on usage.")
3087 (process
, current_group
)
3088 Lisp_Object process
, current_group
;
3090 process_send_signal (process
, SIGKILL
, current_group
, 0);
3094 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
3095 "Send QUIT signal to process PROCESS. May be process or name of one.\n\
3096 See function `interrupt-process' for more details on usage.")
3097 (process
, current_group
)
3098 Lisp_Object process
, current_group
;
3100 process_send_signal (process
, SIGQUIT
, current_group
, 0);
3104 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
3105 "Stop process PROCESS. May be process or name of one.\n\
3106 See function `interrupt-process' for more details on usage.")
3107 (process
, current_group
)
3108 Lisp_Object process
, current_group
;
3111 error ("no SIGTSTP support");
3113 process_send_signal (process
, SIGTSTP
, current_group
, 0);
3118 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
3119 "Continue process PROCESS. May be process or name of one.\n\
3120 See function `interrupt-process' for more details on usage.")
3121 (process
, current_group
)
3122 Lisp_Object process
, current_group
;
3125 process_send_signal (process
, SIGCONT
, current_group
, 0);
3127 error ("no SIGCONT support");
3132 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
3133 2, 2, "nProcess number: \nnSignal code: ",
3134 "Send the process with process id PID the signal with code SIGCODE.\n\
3135 PID must be an integer. The process need not be a child of this Emacs.\n\
3136 SIGCODE may be an integer, or a symbol whose name is a signal name.")
3138 Lisp_Object pid
, sigcode
;
3140 CHECK_NUMBER (pid
, 0);
3142 #define handle_signal(NAME, VALUE) \
3143 else if (!strcmp (name, NAME)) \
3144 XSETINT (sigcode, VALUE)
3146 if (INTEGERP (sigcode
))
3150 unsigned char *name
;
3152 CHECK_SYMBOL (sigcode
, 1);
3153 name
= XSYMBOL (sigcode
)->name
->data
;
3158 handle_signal ("SIGHUP", SIGHUP
);
3161 handle_signal ("SIGINT", SIGINT
);
3164 handle_signal ("SIGQUIT", SIGQUIT
);
3167 handle_signal ("SIGILL", SIGILL
);
3170 handle_signal ("SIGABRT", SIGABRT
);
3173 handle_signal ("SIGEMT", SIGEMT
);
3176 handle_signal ("SIGKILL", SIGKILL
);
3179 handle_signal ("SIGFPE", SIGFPE
);
3182 handle_signal ("SIGBUS", SIGBUS
);
3185 handle_signal ("SIGSEGV", SIGSEGV
);
3188 handle_signal ("SIGSYS", SIGSYS
);
3191 handle_signal ("SIGPIPE", SIGPIPE
);
3194 handle_signal ("SIGALRM", SIGALRM
);
3197 handle_signal ("SIGTERM", SIGTERM
);
3200 handle_signal ("SIGURG", SIGURG
);
3203 handle_signal ("SIGSTOP", SIGSTOP
);
3206 handle_signal ("SIGTSTP", SIGTSTP
);
3209 handle_signal ("SIGCONT", SIGCONT
);
3212 handle_signal ("SIGCHLD", SIGCHLD
);
3215 handle_signal ("SIGTTIN", SIGTTIN
);
3218 handle_signal ("SIGTTOU", SIGTTOU
);
3221 handle_signal ("SIGIO", SIGIO
);
3224 handle_signal ("SIGXCPU", SIGXCPU
);
3227 handle_signal ("SIGXFSZ", SIGXFSZ
);
3230 handle_signal ("SIGVTALRM", SIGVTALRM
);
3233 handle_signal ("SIGPROF", SIGPROF
);
3236 handle_signal ("SIGWINCH", SIGWINCH
);
3239 handle_signal ("SIGINFO", SIGINFO
);
3242 handle_signal ("SIGUSR1", SIGUSR1
);
3245 handle_signal ("SIGUSR2", SIGUSR2
);
3248 error ("Undefined signal name %s", name
);
3251 #undef handle_signal
3253 return make_number (kill (XINT (pid
), XINT (sigcode
)));
3256 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
3257 "Make PROCESS see end-of-file in its input.\n\
3258 Eof comes after any text already sent to it.\n\
3259 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3260 nil, indicating the current buffer's process.\n\
3261 If PROCESS is a network connection, or is a process communicating\n\
3262 through a pipe (as opposed to a pty), then you cannot send any more\n\
3263 text to PROCESS after you call this function.")
3265 Lisp_Object process
;
3269 proc
= get_process (process
);
3271 /* Make sure the process is really alive. */
3272 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3273 update_status (XPROCESS (proc
));
3274 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3275 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
3278 send_process (proc
, "\032", 1, Qnil
); /* ^z */
3280 if (!NILP (XPROCESS (proc
)->pty_flag
))
3281 send_process (proc
, "\004", 1, Qnil
);
3284 close (XINT (XPROCESS (proc
)->outfd
));
3285 XSETINT (XPROCESS (proc
)->outfd
, open (NULL_DEVICE
, O_WRONLY
));
3291 /* Kill all processes associated with `buffer'.
3292 If `buffer' is nil, kill all processes */
3294 kill_buffer_processes (buffer
)
3297 Lisp_Object tail
, proc
;
3299 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3301 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3302 if (GC_PROCESSP (proc
)
3303 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
3305 if (NETCONN_P (proc
))
3306 Fdelete_process (proc
);
3307 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
3308 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
3313 /* On receipt of a signal that a child status has changed,
3314 loop asking about children with changed statuses until
3315 the system says there are no more.
3316 All we do is change the status;
3317 we do not run sentinels or print notifications.
3318 That is saved for the next time keyboard input is done,
3319 in order to avoid timing errors. */
3321 /** WARNING: this can be called during garbage collection.
3322 Therefore, it must not be fooled by the presence of mark bits in
3325 /** USG WARNING: Although it is not obvious from the documentation
3326 in signal(2), on a USG system the SIGCLD handler MUST NOT call
3327 signal() before executing at least one wait(), otherwise the handler
3328 will be called again, resulting in an infinite loop. The relevant
3329 portion of the documentation reads "SIGCLD signals will be queued
3330 and the signal-catching function will be continually reentered until
3331 the queue is empty". Invoking signal() causes the kernel to reexamine
3332 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
3335 sigchld_handler (signo
)
3338 int old_errno
= errno
;
3340 register struct Lisp_Process
*p
;
3341 extern EMACS_TIME
*input_available_clear_time
;
3345 sigheld
|= sigbit (SIGCHLD
);
3357 #endif /* no WUNTRACED */
3358 /* Keep trying to get a status until we get a definitive result. */
3362 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
3364 while (pid
<= 0 && errno
== EINTR
);
3368 /* A real failure. We have done all our job, so return. */
3370 /* USG systems forget handlers when they are used;
3371 must reestablish each time */
3373 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
3376 sigheld
&= ~sigbit (SIGCHLD
);
3384 #endif /* no WNOHANG */
3386 /* Find the process that signaled us, and record its status. */
3389 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3391 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3392 p
= XPROCESS (proc
);
3393 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
3398 /* Look for an asynchronous process whose pid hasn't been filled
3401 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3403 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3404 p
= XPROCESS (proc
);
3405 if (INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
3410 /* Change the status of the process that was found. */
3413 union { int i
; WAITTYPE wt
; } u
;
3414 int clear_desc_flag
= 0;
3416 XSETINT (p
->tick
, ++process_tick
);
3418 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
3419 XSETINT (p
->raw_status_high
, u
.i
>> 16);
3421 /* If process has terminated, stop waiting for its output. */
3422 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
3423 && XINT (p
->infd
) >= 0)
3424 clear_desc_flag
= 1;
3426 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
3427 if (clear_desc_flag
)
3429 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
3430 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
3433 /* Tell wait_reading_process_input that it needs to wake up and
3435 if (input_available_clear_time
)
3436 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3439 /* There was no asynchronous process found for that id. Check
3440 if we have a synchronous process. */
3443 synch_process_alive
= 0;
3445 /* Report the status of the synchronous process. */
3447 synch_process_retcode
= WRETCODE (w
);
3448 else if (WIFSIGNALED (w
))
3450 int code
= WTERMSIG (w
);
3456 /* Suppress warning if the table has const char *. */
3457 signame
= (char *) sys_siglist
[code
];
3459 signame
= sys_errlist
[code
];
3463 signame
= "unknown";
3465 synch_process_death
= signame
;
3468 /* Tell wait_reading_process_input that it needs to wake up and
3470 if (input_available_clear_time
)
3471 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3474 /* On some systems, we must return right away.
3475 If any more processes want to signal us, we will
3477 Otherwise (on systems that have WNOHANG), loop around
3478 to use up all the processes that have something to tell us. */
3479 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT)
3481 signal (signo
, sigchld_handler
);
3485 #endif /* USG, but not HPUX with WNOHANG */
3491 exec_sentinel_unwind (data
)
3494 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
3499 exec_sentinel_error_handler (error
)
3502 cmd_error_internal (error
, "error in process sentinel: ");
3504 update_echo_area ();
3505 Fsleep_for (make_number (2), Qnil
);
3509 exec_sentinel (proc
, reason
)
3510 Lisp_Object proc
, reason
;
3512 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
3513 register struct Lisp_Process
*p
= XPROCESS (proc
);
3514 int count
= specpdl_ptr
- specpdl
;
3516 /* No need to gcpro these, because all we do with them later
3517 is test them for EQness, and none of them should be a string. */
3518 odeactivate
= Vdeactivate_mark
;
3519 XSETBUFFER (obuffer
, current_buffer
);
3520 okeymap
= current_buffer
->keymap
;
3522 sentinel
= p
->sentinel
;
3523 if (NILP (sentinel
))
3526 /* Zilch the sentinel while it's running, to avoid recursive invocations;
3527 assure that it gets restored no matter how the sentinel exits. */
3529 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
3530 /* Inhibit quit so that random quits don't screw up a running filter. */
3531 specbind (Qinhibit_quit
, Qt
);
3532 specbind (Qlast_nonmenu_event
, Qt
);
3534 running_asynch_code
= 1;
3535 internal_condition_case_1 (read_process_output_call
,
3537 Fcons (proc
, Fcons (reason
, Qnil
))),
3538 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
3539 exec_sentinel_error_handler
);
3540 running_asynch_code
= 0;
3541 restore_match_data ();
3543 Vdeactivate_mark
= odeactivate
;
3545 if (! EQ (Fcurrent_buffer (), obuffer
)
3546 || ! EQ (current_buffer
->keymap
, okeymap
))
3548 /* But do it only if the caller is actually going to read events.
3549 Otherwise there's no need to make him wake up, and it could
3550 cause trouble (for example it would make Fsit_for return). */
3551 if (waiting_for_user_input_p
== -1)
3552 record_asynch_buffer_change ();
3554 unbind_to (count
, Qnil
);
3557 /* Report all recent events of a change in process status
3558 (either run the sentinel or output a message).
3559 This is done while Emacs is waiting for keyboard input. */
3563 register Lisp_Object proc
, buffer
;
3564 Lisp_Object tail
, msg
;
3565 struct gcpro gcpro1
, gcpro2
;
3569 /* We need to gcpro tail; if read_process_output calls a filter
3570 which deletes a process and removes the cons to which tail points
3571 from Vprocess_alist, and then causes a GC, tail is an unprotected
3575 /* Set this now, so that if new processes are created by sentinels
3576 that we run, we get called again to handle their status changes. */
3577 update_tick
= process_tick
;
3579 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
3582 register struct Lisp_Process
*p
;
3584 proc
= Fcdr (Fcar (tail
));
3585 p
= XPROCESS (proc
);
3587 if (XINT (p
->tick
) != XINT (p
->update_tick
))
3589 XSETINT (p
->update_tick
, XINT (p
->tick
));
3591 /* If process is still active, read any output that remains. */
3592 if (XINT (p
->infd
) >= 0)
3593 while (! EQ (p
->filter
, Qt
)
3594 && read_process_output (proc
, XINT (p
->infd
)) > 0);
3598 /* Get the text to use for the message. */
3599 if (!NILP (p
->raw_status_low
))
3601 msg
= status_message (p
->status
);
3603 /* If process is terminated, deactivate it or delete it. */
3605 if (CONSP (p
->status
))
3606 symbol
= XCONS (p
->status
)->car
;
3608 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
3609 || EQ (symbol
, Qclosed
))
3611 if (delete_exited_processes
)
3612 remove_process (proc
);
3614 deactivate_process (proc
);
3617 /* Now output the message suitably. */
3618 if (!NILP (p
->sentinel
))
3619 exec_sentinel (proc
, msg
);
3620 /* Don't bother with a message in the buffer
3621 when a process becomes runnable. */
3622 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
3624 Lisp_Object ro
, tem
;
3625 struct buffer
*old
= current_buffer
;
3628 ro
= XBUFFER (buffer
)->read_only
;
3630 /* Avoid error if buffer is deleted
3631 (probably that's why the process is dead, too) */
3632 if (NILP (XBUFFER (buffer
)->name
))
3634 Fset_buffer (buffer
);
3636 /* Insert new output into buffer
3637 at the current end-of-output marker,
3638 thus preserving logical ordering of input and output. */
3639 if (XMARKER (p
->mark
)->buffer
)
3640 SET_PT (marker_position (p
->mark
));
3644 opoint
+= XSTRING (msg
)->size
+ XSTRING (p
->name
)->size
+ 10;
3646 tem
= current_buffer
->read_only
;
3647 current_buffer
->read_only
= Qnil
;
3648 insert_string ("\nProcess ");
3649 Finsert (1, &p
->name
);
3650 insert_string (" ");
3652 current_buffer
->read_only
= tem
;
3653 Fset_marker (p
->mark
, make_number (PT
), p
->buffer
);
3656 set_buffer_internal (old
);
3661 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
3662 redisplay_preserve_echo_area ();
3667 /* The first time this is called, assume keyboard input comes from DESC
3668 instead of from where we used to expect it.
3669 Subsequent calls mean assume input keyboard can come from DESC
3670 in addition to other places. */
3672 static int add_keyboard_wait_descriptor_called_flag
;
3675 add_keyboard_wait_descriptor (desc
)
3678 if (! add_keyboard_wait_descriptor_called_flag
)
3679 FD_CLR (0, &input_wait_mask
);
3680 add_keyboard_wait_descriptor_called_flag
= 1;
3681 FD_SET (desc
, &input_wait_mask
);
3682 if (desc
> max_keyboard_desc
)
3683 max_keyboard_desc
= desc
;
3686 /* From now on, do not expect DESC to give keyboard input. */
3689 delete_keyboard_wait_descriptor (desc
)
3693 int lim
= max_keyboard_desc
;
3695 FD_CLR (desc
, &input_wait_mask
);
3697 if (desc
== max_keyboard_desc
)
3698 for (fd
= 0; fd
< lim
; fd
++)
3699 if (FD_ISSET (fd
, &input_wait_mask
)
3700 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3701 max_keyboard_desc
= fd
;
3704 /* Return nonzero if *MASK has a bit set
3705 that corresponds to one of the keyboard input descriptors. */
3708 keyboard_bit_set (mask
)
3713 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
3714 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
3715 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3727 if (! noninteractive
|| initialized
)
3729 signal (SIGCHLD
, sigchld_handler
);
3732 FD_ZERO (&input_wait_mask
);
3733 FD_ZERO (&non_keyboard_wait_mask
);
3734 max_process_desc
= 0;
3736 FD_SET (0, &input_wait_mask
);
3738 Vprocess_alist
= Qnil
;
3739 for (i
= 0; i
< MAXDESC
; i
++)
3741 chan_process
[i
] = Qnil
;
3742 proc_buffered_char
[i
] = -1;
3749 stream_process
= intern ("stream");
3751 Qprocessp
= intern ("processp");
3752 staticpro (&Qprocessp
);
3753 Qrun
= intern ("run");
3755 Qstop
= intern ("stop");
3757 Qsignal
= intern ("signal");
3758 staticpro (&Qsignal
);
3760 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
3763 Qexit = intern ("exit");
3764 staticpro (&Qexit); */
3766 Qopen
= intern ("open");
3768 Qclosed
= intern ("closed");
3769 staticpro (&Qclosed
);
3771 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
3772 staticpro (&Qlast_nonmenu_event
);
3774 staticpro (&Vprocess_alist
);
3776 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
3777 "*Non-nil means delete processes immediately when they exit.\n\
3778 nil means don't delete them until `list-processes' is run.");
3780 delete_exited_processes
= 1;
3782 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
3783 "Control type of device used to communicate with subprocesses.\n\
3784 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
3785 The value has no effect if the system has no ptys or if all ptys are busy:\n\
3786 then a pipe is used in any case.\n\
3787 The value takes effect when `start-process' is called.");
3788 Vprocess_connection_type
= Qt
;
3790 defsubr (&Sprocessp
);
3791 defsubr (&Sget_process
);
3792 defsubr (&Sget_buffer_process
);
3793 defsubr (&Sdelete_process
);
3794 defsubr (&Sprocess_status
);
3795 defsubr (&Sprocess_exit_status
);
3796 defsubr (&Sprocess_id
);
3797 defsubr (&Sprocess_name
);
3798 defsubr (&Sprocess_tty_name
);
3799 defsubr (&Sprocess_command
);
3800 defsubr (&Sset_process_buffer
);
3801 defsubr (&Sprocess_buffer
);
3802 defsubr (&Sprocess_mark
);
3803 defsubr (&Sset_process_filter
);
3804 defsubr (&Sprocess_filter
);
3805 defsubr (&Sset_process_sentinel
);
3806 defsubr (&Sprocess_sentinel
);
3807 defsubr (&Sset_process_window_size
);
3808 defsubr (&Sprocess_kill_without_query
);
3809 defsubr (&Sprocess_contact
);
3810 defsubr (&Slist_processes
);
3811 defsubr (&Sprocess_list
);
3812 defsubr (&Sstart_process
);
3814 defsubr (&Sopen_network_stream
);
3815 #endif /* HAVE_SOCKETS */
3816 defsubr (&Saccept_process_output
);
3817 defsubr (&Sprocess_send_region
);
3818 defsubr (&Sprocess_send_string
);
3819 defsubr (&Sinterrupt_process
);
3820 defsubr (&Skill_process
);
3821 defsubr (&Squit_process
);
3822 defsubr (&Sstop_process
);
3823 defsubr (&Scontinue_process
);
3824 defsubr (&Sprocess_send_eof
);
3825 defsubr (&Ssignal_process
);
3826 defsubr (&Swaiting_for_user_input_p
);
3827 /* defsubr (&Sprocess_connection); */
3831 #else /* not subprocesses */
3833 #include <sys/types.h>
3837 #include "systime.h"
3838 #include "termopts.h"
3839 #include "sysselect.h"
3841 extern int frame_garbaged
;
3843 extern EMACS_TIME
timer_check ();
3844 extern int timers_run
;
3846 /* As described above, except assuming that there are no subprocesses:
3848 Wait for timeout to elapse and/or keyboard input to be available.
3851 timeout in seconds, or
3852 zero for no limit, or
3853 -1 means gobble data immediately available but don't wait for any.
3855 read_kbd is a Lisp_Object:
3856 0 to ignore keyboard input, or
3857 1 to return when input is available, or
3858 -1 means caller will actually read the input, so don't throw to
3860 a cons cell, meaning wait until its car is non-nil
3861 (and gobble terminal input into the buffer if any arrives), or
3862 We know that read_kbd will never be a Lisp_Process, since
3863 `subprocesses' isn't defined.
3865 do_display != 0 means redisplay should be done to show subprocess
3866 output that arrives.
3868 Return true iff we received input from any process. */
3871 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
3872 int time_limit
, microsecs
;
3873 Lisp_Object read_kbd
;
3876 EMACS_TIME end_time
, timeout
;
3877 SELECT_TYPE waitchannels
;
3879 Lisp_Object
*wait_for_cell
= 0;
3881 /* If waiting for non-nil in a cell, record where. */
3882 if (CONSP (read_kbd
))
3884 wait_for_cell
= &XCONS (read_kbd
)->car
;
3885 XSETFASTINT (read_kbd
, 0);
3888 /* What does time_limit really mean? */
3889 if (time_limit
|| microsecs
)
3891 if (time_limit
== -1)
3892 /* In fact, it's zero. */
3893 EMACS_SET_SECS_USECS (timeout
, 0, 0);
3895 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
3897 /* How far in the future is that? */
3898 EMACS_GET_TIME (end_time
);
3899 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
3902 /* It's infinite. */
3903 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
3905 /* Turn off periodic alarms (in case they are in use)
3906 because the select emulator uses alarms. */
3912 int timeout_reduced_for_timers
= 0;
3914 /* If calling from keyboard input, do not quit
3915 since we want to return C-g as an input character.
3916 Otherwise, do pending quit if requested. */
3917 if (XINT (read_kbd
) >= 0)
3920 /* Exit now if the cell we're waiting for became non-nil. */
3921 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
3924 /* Compute time from now till when time limit is up */
3925 /* Exit if already run out */
3926 if (time_limit
> 0 || microsecs
)
3928 EMACS_GET_TIME (timeout
);
3929 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
3930 if (EMACS_TIME_NEG_P (timeout
))
3934 /* If our caller will not immediately handle keyboard events,
3935 run timer events directly.
3936 (Callers that will immediately read keyboard events
3937 call timer_delay on their own.) */
3938 if (! wait_for_cell
)
3940 EMACS_TIME timer_delay
;
3944 old_timers_run
= timers_run
;
3945 timer_delay
= timer_check (1);
3946 if (timers_run
!= old_timers_run
&& do_display
)
3948 redisplay_preserve_echo_area ();
3949 /* We must retry, since a timer may have requeued itself
3950 and that could alter the time delay. */
3954 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
3956 EMACS_TIME difference
;
3957 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
3958 if (EMACS_TIME_NEG_P (difference
))
3960 timeout
= timer_delay
;
3961 timeout_reduced_for_timers
= 1;
3966 /* Cause C-g and alarm signals to take immediate action,
3967 and cause input available signals to zero out timeout. */
3968 if (XINT (read_kbd
) < 0)
3969 set_waiting_for_input (&timeout
);
3971 /* Wait till there is something to do. */
3973 if (! XINT (read_kbd
) && wait_for_cell
== 0)
3974 FD_ZERO (&waitchannels
);
3976 FD_SET (0, &waitchannels
);
3978 /* If a frame has been newly mapped and needs updating,
3979 reprocess its display stuff. */
3980 if (frame_garbaged
&& do_display
)
3982 clear_waiting_for_input ();
3983 redisplay_preserve_echo_area ();
3984 if (XINT (read_kbd
) < 0)
3985 set_waiting_for_input (&timeout
);
3988 if (XINT (read_kbd
) && detect_input_pending ())
3991 FD_ZERO (&waitchannels
);
3994 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
3999 /* Make C-g and alarm signals set flags again */
4000 clear_waiting_for_input ();
4002 /* If we woke up due to SIGWINCH, actually change size now. */
4003 do_pending_window_change ();
4005 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4006 /* We waited the full specified time, so return now. */
4011 /* If the system call was interrupted, then go around the
4013 if (xerrno
== EINTR
)
4014 FD_ZERO (&waitchannels
);
4016 error ("select error: %s", strerror (xerrno
));
4019 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
4020 /* System sometimes fails to deliver SIGIO. */
4021 kill (getpid (), SIGIO
);
4024 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
4025 kill (getpid (), SIGIO
);
4028 /* Check for keyboard input */
4030 if ((XINT (read_kbd
) != 0)
4031 && detect_input_pending_run_timers (do_display
))
4033 swallow_events (do_display
);
4034 if (detect_input_pending_run_timers (do_display
))
4038 /* If wait_for_cell. check for keyboard input
4039 but don't run any timers.
4040 ??? (It seems wrong to me to check for keyboard
4041 input at all when wait_for_cell, but the code
4042 has been this way since July 1994.
4043 Try changing this after version 19.31.) */
4045 && detect_input_pending ())
4047 swallow_events (do_display
);
4048 if (detect_input_pending ())
4052 /* Exit now if the cell we're waiting for became non-nil. */
4053 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
4063 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
4064 /* Don't confuse make-docfile by having two doc strings for this function.
4065 make-docfile does not pay attention to #if, for good reason! */
4068 register Lisp_Object name
;
4073 /* Kill all processes associated with `buffer'.
4074 If `buffer' is nil, kill all processes.
4075 Since we have no subprocesses, this does nothing. */
4077 kill_buffer_processes (buffer
)
4088 defsubr (&Sget_buffer_process
);
4092 #endif /* not subprocesses */