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_SYSTEM) || 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_SYSTEM || 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 #define NETCONN_P(p) (GC_CONSP (XPROCESS (p)->childp))
118 #define NETCONN_P(p) 0
119 #endif /* HAVE_SOCKETS */
121 /* Define first descriptor number available for subprocesses. */
123 #define FIRST_PROC_DESC 1
125 #define FIRST_PROC_DESC 3
128 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
131 #if !defined (SIGCHLD) && defined (SIGCLD)
132 #define SIGCHLD SIGCLD
135 #include "syssignal.h"
140 extern char *strerror ();
142 extern char *sys_errlist
[];
149 #ifndef SYS_SIGLIST_DECLARED
154 extern char *sys_siglist
[];
155 #endif /* not LINUX */
157 char *sys_siglist
[] =
163 "illegal instruction",
167 "floating point exception",
170 "segmentation violation",
171 "bad argument to system call",
172 "write on a pipe with no one to read it",
174 "software termination signal from kill",
176 "sendable stop signal not from tty",
177 "stop signal from tty",
178 "continue a stopped process",
179 "child status has changed",
180 "background read attempted from control tty",
181 "background write attempted from control tty",
182 "input record available at control tty",
183 "exceeded CPU time limit",
184 "exceeded file size limit"
186 #endif /* not WINDOWSNT */
189 #endif /* ! SYS_SIGLIST_DECLARED */
191 /* t means use pty, nil means use a pipe,
192 maybe other values to come. */
193 static Lisp_Object Vprocess_connection_type
;
197 #include <sys/socket.h>
201 /* These next two vars are non-static since sysdep.c uses them in the
202 emulation of `select'. */
203 /* Number of events of change of status of a process. */
205 /* Number of events for which the user or sentinel has been notified. */
208 #include "sysselect.h"
210 /* If we support a window system, turn on the code to poll periodically
211 to detect C-g. It isn't actually used when doing interrupt input. */
212 #ifdef HAVE_WINDOW_SYSTEM
213 #define POLL_FOR_INPUT
216 /* Mask of bits indicating the descriptors that we wait for input on. */
218 static SELECT_TYPE input_wait_mask
;
220 /* Mask that excludes keyboard input descriptor (s). */
222 static SELECT_TYPE non_keyboard_wait_mask
;
224 /* The largest descriptor currently in use for a process object. */
225 static int max_process_desc
;
227 /* The largest descriptor currently in use for keyboard input. */
228 static int max_keyboard_desc
;
230 /* Nonzero means delete a process right away if it exits. */
231 static int delete_exited_processes
;
233 /* Indexed by descriptor, gives the process (if any) for that descriptor */
234 Lisp_Object chan_process
[MAXDESC
];
236 /* Alist of elements (NAME . PROCESS) */
237 Lisp_Object Vprocess_alist
;
239 /* Buffered-ahead input char from process, indexed by channel.
240 -1 means empty (no char is buffered).
241 Used on sys V where the only way to tell if there is any
242 output from the process is to read at least one char.
243 Always -1 on systems that support FIONREAD. */
245 /* Don't make static; need to access externally. */
246 int proc_buffered_char
[MAXDESC
];
248 static Lisp_Object
get_process ();
250 extern EMACS_TIME
timer_check ();
251 extern int timers_run
;
253 /* Maximum number of bytes to send to a pty without an eof. */
254 static int pty_max_bytes
;
257 /* The file name of the pty opened by allocate_pty. */
259 static char pty_name
[24];
262 /* Compute the Lisp form of the process status, p->status, from
263 the numeric status that was returned by `wait'. */
265 Lisp_Object
status_convert ();
268 struct Lisp_Process
*p
;
270 union { int i
; WAITTYPE wt
; } u
;
271 u
.i
= XFASTINT (p
->raw_status_low
) + (XFASTINT (p
->raw_status_high
) << 16);
272 p
->status
= status_convert (u
.wt
);
273 p
->raw_status_low
= Qnil
;
274 p
->raw_status_high
= Qnil
;
277 /* Convert a process status word in Unix format to
278 the list that we use internally. */
285 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
286 else if (WIFEXITED (w
))
287 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
288 WCOREDUMP (w
) ? Qt
: Qnil
));
289 else if (WIFSIGNALED (w
))
290 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
291 WCOREDUMP (w
) ? Qt
: Qnil
));
296 /* Given a status-list, extract the three pieces of information
297 and store them individually through the three pointers. */
300 decode_status (l
, symbol
, code
, coredump
)
316 *symbol
= XCONS (l
)->car
;
317 tem
= XCONS (l
)->cdr
;
318 *code
= XFASTINT (XCONS (tem
)->car
);
319 tem
= XCONS (tem
)->cdr
;
320 *coredump
= !NILP (tem
);
324 /* Return a string describing a process status list. */
327 status_message (status
)
332 Lisp_Object string
, string2
;
334 decode_status (status
, &symbol
, &code
, &coredump
);
336 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
342 /* Cast to suppress warning if the table has const char *. */
343 signame
= (char *) sys_siglist
[code
];
345 signame
= sys_errlist
[code
];
350 string
= build_string (signame
);
351 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
352 XSTRING (string
)->data
[0] = DOWNCASE (XSTRING (string
)->data
[0]);
353 return concat2 (string
, string2
);
355 else if (EQ (symbol
, Qexit
))
358 return build_string ("finished\n");
359 string
= Fnumber_to_string (make_number (code
));
360 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
361 return concat2 (build_string ("exited abnormally with code "),
362 concat2 (string
, string2
));
365 return Fcopy_sequence (Fsymbol_name (symbol
));
370 /* Open an available pty, returning a file descriptor.
371 Return -1 on failure.
372 The file name of the terminal corresponding to the pty
373 is left in the variable pty_name. */
382 /* Some systems name their pseudoterminals so that there are gaps in
383 the usual sequence - for example, on HP9000/S700 systems, there
384 are no pseudoterminals with names ending in 'f'. So we wait for
385 three failures in a row before deciding that we've reached the
387 int failed_count
= 0;
392 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
393 for (i
= 0; i
< 16; i
++)
396 #ifdef PTY_NAME_SPRINTF
399 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
400 #endif /* no PTY_NAME_SPRINTF */
404 #else /* no PTY_OPEN */
406 /* Unusual IRIS code */
407 *ptyv
= open ("/dev/ptc", O_RDWR
| O_NDELAY
, 0);
410 if (fstat (fd
, &stb
) < 0)
413 if (stat (pty_name
, &stb
) < 0)
416 if (failed_count
>= 3)
422 fd
= open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
424 fd
= open (pty_name
, O_RDWR
| O_NDELAY
, 0);
426 #endif /* not IRIS */
427 #endif /* no PTY_OPEN */
431 /* check to make certain that both sides are available
432 this avoids a nasty yet stupid bug in rlogins */
433 #ifdef PTY_TTY_NAME_SPRINTF
436 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
437 #endif /* no PTY_TTY_NAME_SPRINTF */
439 if (access (pty_name
, 6) != 0)
442 #if !defined(IRIS) && !defined(__sgi)
448 #endif /* not UNIPLUS */
455 #endif /* HAVE_PTYS */
461 struct Lisp_Vector
*vec
;
462 register Lisp_Object val
, tem
, name1
;
463 register struct Lisp_Process
*p
;
467 vec
= allocate_vectorlike ((EMACS_INT
) VECSIZE (struct Lisp_Process
));
468 for (i
= 0; i
< VECSIZE (struct Lisp_Process
); i
++)
469 vec
->contents
[i
] = Qnil
;
470 vec
->size
= VECSIZE (struct Lisp_Process
);
471 p
= (struct Lisp_Process
*)vec
;
473 XSETINT (p
->infd
, -1);
474 XSETINT (p
->outfd
, -1);
475 XSETFASTINT (p
->pid
, 0);
476 XSETFASTINT (p
->tick
, 0);
477 XSETFASTINT (p
->update_tick
, 0);
478 p
->raw_status_low
= Qnil
;
479 p
->raw_status_high
= Qnil
;
481 p
->mark
= Fmake_marker ();
483 /* If name is already in use, modify it until it is unused. */
488 tem
= Fget_process (name1
);
489 if (NILP (tem
)) break;
490 sprintf (suffix
, "<%d>", i
);
491 name1
= concat2 (name
, build_string (suffix
));
495 XSETPROCESS (val
, p
);
496 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
500 remove_process (proc
)
501 register Lisp_Object proc
;
503 register Lisp_Object pair
;
505 pair
= Frassq (proc
, Vprocess_alist
);
506 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
508 deactivate_process (proc
);
511 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
512 "Return t if OBJECT is a process.")
516 return PROCESSP (object
) ? Qt
: Qnil
;
519 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
520 "Return the process named NAME, or nil if there is none.")
522 register Lisp_Object name
;
526 CHECK_STRING (name
, 0);
527 return Fcdr (Fassoc (name
, Vprocess_alist
));
530 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
531 "Return the (or, a) process associated with BUFFER.\n\
532 BUFFER may be a buffer or the name of one.")
534 register Lisp_Object buffer
;
536 register Lisp_Object buf
, tail
, proc
;
538 if (NILP (buffer
)) return Qnil
;
539 buf
= Fget_buffer (buffer
);
540 if (NILP (buf
)) return Qnil
;
542 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
544 proc
= Fcdr (Fcar (tail
));
545 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
551 /* This is how commands for the user decode process arguments. It
552 accepts a process, a process name, a buffer, a buffer name, or nil.
553 Buffers denote the first process in the buffer, and nil denotes the
558 register Lisp_Object name
;
560 register Lisp_Object proc
, obj
;
563 obj
= Fget_process (name
);
565 obj
= Fget_buffer (name
);
567 error ("Process %s does not exist", XSTRING (name
)->data
);
569 else if (NILP (name
))
570 obj
= Fcurrent_buffer ();
574 /* Now obj should be either a buffer object or a process object.
578 proc
= Fget_buffer_process (obj
);
580 error ("Buffer %s has no process", XSTRING (XBUFFER (obj
)->name
)->data
);
584 CHECK_PROCESS (obj
, 0);
590 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
591 "Delete PROCESS: kill it and forget about it immediately.\n\
592 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
593 nil, indicating the current buffer's process.")
595 register Lisp_Object process
;
597 process
= get_process (process
);
598 XPROCESS (process
)->raw_status_low
= Qnil
;
599 XPROCESS (process
)->raw_status_high
= Qnil
;
600 if (NETCONN_P (process
))
602 XPROCESS (process
)->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
603 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
605 else if (XINT (XPROCESS (process
)->infd
) >= 0)
607 Fkill_process (process
, Qnil
);
608 /* Do this now, since remove_process will make sigchld_handler do nothing. */
609 XPROCESS (process
)->status
610 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
611 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
614 remove_process (process
);
618 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
619 "Return the status of PROCESS: a symbol, one of these:\n\
620 run -- for a process that is running.\n\
621 stop -- for a process stopped but continuable.\n\
622 exit -- for a process that has exited.\n\
623 signal -- for a process that has got a fatal signal.\n\
624 open -- for a network stream connection that is open.\n\
625 closed -- for a network stream connection that is closed.\n\
626 nil -- if arg is a process name and no such process exists.\n\
627 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
628 nil, indicating the current buffer's process.")
630 register Lisp_Object process
;
632 register struct Lisp_Process
*p
;
633 register Lisp_Object status
;
635 if (STRINGP (process
))
636 process
= Fget_process (process
);
638 process
= get_process (process
);
643 p
= XPROCESS (process
);
644 if (!NILP (p
->raw_status_low
))
648 status
= XCONS (status
)->car
;
649 if (NETCONN_P (process
))
651 if (EQ (status
, Qrun
))
653 else if (EQ (status
, Qexit
))
659 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
661 "Return the exit status of PROCESS or the signal number that killed it.\n\
662 If PROCESS has not yet exited or died, return 0.")
664 register Lisp_Object process
;
666 CHECK_PROCESS (process
, 0);
667 if (!NILP (XPROCESS (process
)->raw_status_low
))
668 update_status (XPROCESS (process
));
669 if (CONSP (XPROCESS (process
)->status
))
670 return XCONS (XCONS (XPROCESS (process
)->status
)->cdr
)->car
;
671 return make_number (0);
674 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
675 "Return the process id of PROCESS.\n\
676 This is the pid of the Unix process which PROCESS uses or talks to.\n\
677 For a network connection, this value is nil.")
679 register Lisp_Object process
;
681 CHECK_PROCESS (process
, 0);
682 return XPROCESS (process
)->pid
;
685 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
686 "Return the name of PROCESS, as a string.\n\
687 This is the name of the program invoked in PROCESS,\n\
688 possibly modified to make it unique among process names.")
690 register Lisp_Object process
;
692 CHECK_PROCESS (process
, 0);
693 return XPROCESS (process
)->name
;
696 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
697 "Return the command that was executed to start PROCESS.\n\
698 This is a list of strings, the first string being the program executed\n\
699 and the rest of the strings being the arguments given to it.\n\
700 For a non-child channel, this is nil.")
702 register Lisp_Object process
;
704 CHECK_PROCESS (process
, 0);
705 return XPROCESS (process
)->command
;
708 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
709 "Return the name of the terminal PROCESS uses, or nil if none.\n\
710 This is the terminal that the process itself reads and writes on,\n\
711 not the name of the pty that Emacs uses to talk with that terminal.")
713 register Lisp_Object process
;
715 CHECK_PROCESS (process
, 0);
716 return XPROCESS (process
)->tty_name
;
719 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
721 "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).")
723 register Lisp_Object process
, buffer
;
725 CHECK_PROCESS (process
, 0);
727 CHECK_BUFFER (buffer
, 1);
728 XPROCESS (process
)->buffer
= buffer
;
732 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
734 "Return the buffer PROCESS is associated with.\n\
735 Output from PROCESS is inserted in this buffer\n\
736 unless PROCESS has a filter.")
738 register Lisp_Object process
;
740 CHECK_PROCESS (process
, 0);
741 return XPROCESS (process
)->buffer
;
744 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
746 "Return the marker for the end of the last output from PROCESS.")
748 register Lisp_Object process
;
750 CHECK_PROCESS (process
, 0);
751 return XPROCESS (process
)->mark
;
754 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
756 "Give PROCESS the filter function FILTER; nil means no filter.\n\
757 t means stop accepting output from the process.\n\
758 When a process has a filter, each time it does output\n\
759 the entire string of output is passed to the filter.\n\
760 The filter gets two arguments: the process and the string of output.\n\
761 If the process has a filter, its buffer is not used for output.")
763 register Lisp_Object process
, filter
;
765 CHECK_PROCESS (process
, 0);
768 FD_CLR (XINT (XPROCESS (process
)->infd
), &input_wait_mask
);
769 FD_CLR (XINT (XPROCESS (process
)->infd
), &non_keyboard_wait_mask
);
771 else if (EQ (XPROCESS (process
)->filter
, Qt
))
773 FD_SET (XINT (XPROCESS (process
)->infd
), &input_wait_mask
);
774 FD_SET (XINT (XPROCESS (process
)->infd
), &non_keyboard_wait_mask
);
776 XPROCESS (process
)->filter
= filter
;
780 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
782 "Returns the filter function of PROCESS; nil if none.\n\
783 See `set-process-filter' for more info on filter functions.")
785 register Lisp_Object process
;
787 CHECK_PROCESS (process
, 0);
788 return XPROCESS (process
)->filter
;
791 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
793 "Give PROCESS the sentinel SENTINEL; nil for none.\n\
794 The sentinel is called as a function when the process changes state.\n\
795 It gets two arguments: the process, and a string describing the change.")
797 register Lisp_Object process
, sentinel
;
799 CHECK_PROCESS (process
, 0);
800 XPROCESS (process
)->sentinel
= sentinel
;
804 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
806 "Return the sentinel of PROCESS; nil if none.\n\
807 See `set-process-sentinel' for more info on sentinels.")
809 register Lisp_Object process
;
811 CHECK_PROCESS (process
, 0);
812 return XPROCESS (process
)->sentinel
;
815 DEFUN ("set-process-window-size", Fset_process_window_size
,
816 Sset_process_window_size
, 3, 3, 0,
817 "Tell PROCESS that it has logical window size HEIGHT and WIDTH.")
818 (process
, height
, width
)
819 register Lisp_Object process
, height
, width
;
821 CHECK_PROCESS (process
, 0);
822 CHECK_NATNUM (height
, 0);
823 CHECK_NATNUM (width
, 0);
824 if (set_window_size (XINT (XPROCESS (process
)->infd
),
825 XINT (height
), XINT(width
)) <= 0)
831 DEFUN ("process-kill-without-query", Fprocess_kill_without_query
,
832 Sprocess_kill_without_query
, 1, 2, 0,
833 "Say no query needed if PROCESS is running when Emacs is exited.\n\
834 Optional second argument if non-nil says to require a query.\n\
835 Value is t if a query was formerly required.")
837 register Lisp_Object process
, value
;
841 CHECK_PROCESS (process
, 0);
842 tem
= XPROCESS (process
)->kill_without_query
;
843 XPROCESS (process
)->kill_without_query
= Fnull (value
);
848 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
850 "Return the contact info of PROCESS; t for a real child.\n\
851 For a net connection, the value is a cons cell of the form (HOST SERVICE).")
853 register Lisp_Object process
;
855 CHECK_PROCESS (process
, 0);
856 return XPROCESS (process
)->childp
;
859 #if 0 /* Turned off because we don't currently record this info
860 in the process. Perhaps add it. */
861 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
862 "Return the connection type of `PROCESS'.\n\
863 The value is `nil' for a pipe,\n\
864 `t' or `pty' for a pty, or `stream' for a socket connection.")
868 return XPROCESS (process
)->type
;
875 register Lisp_Object tail
, tem
;
876 Lisp_Object proc
, minspace
, tem1
;
877 register struct buffer
*old
= current_buffer
;
878 register struct Lisp_Process
*p
;
882 XSETFASTINT (minspace
, 1);
884 set_buffer_internal (XBUFFER (Vstandard_output
));
885 Fbuffer_disable_undo (Vstandard_output
);
887 current_buffer
->truncate_lines
= Qt
;
890 Proc Status Buffer Tty Command\n\
891 ---- ------ ------ --- -------\n", -1);
893 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
897 proc
= Fcdr (Fcar (tail
));
899 if (NILP (p
->childp
))
902 Finsert (1, &p
->name
);
903 Findent_to (make_number (13), minspace
);
905 if (!NILP (p
->raw_status_low
))
908 if (CONSP (p
->status
))
909 symbol
= XCONS (p
->status
)->car
;
912 if (EQ (symbol
, Qsignal
))
915 tem
= Fcar (Fcdr (p
->status
));
917 if (XINT (tem
) < NSIG
)
918 write_string (sys_errlist
[XINT (tem
)], -1);
921 Fprinc (symbol
, Qnil
);
923 else if (NETCONN_P (proc
))
925 if (EQ (symbol
, Qrun
))
926 write_string ("open", -1);
927 else if (EQ (symbol
, Qexit
))
928 write_string ("closed", -1);
930 Fprinc (symbol
, Qnil
);
933 Fprinc (symbol
, Qnil
);
935 if (EQ (symbol
, Qexit
))
938 tem
= Fcar (Fcdr (p
->status
));
941 sprintf (tembuf
, " %d", (int) XFASTINT (tem
));
942 write_string (tembuf
, -1);
946 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
947 remove_process (proc
);
949 Findent_to (make_number (22), minspace
);
950 if (NILP (p
->buffer
))
951 insert_string ("(none)");
952 else if (NILP (XBUFFER (p
->buffer
)->name
))
953 insert_string ("(Killed)");
955 Finsert (1, &XBUFFER (p
->buffer
)->name
);
957 Findent_to (make_number (37), minspace
);
959 if (STRINGP (p
->tty_name
))
960 Finsert (1, &p
->tty_name
);
962 insert_string ("(none)");
964 Findent_to (make_number (49), minspace
);
966 if (NETCONN_P (proc
))
968 sprintf (tembuf
, "(network stream connection to %s)\n",
969 XSTRING (XCONS (p
->childp
)->car
)->data
);
970 insert_string (tembuf
);
984 insert_string ("\n");
990 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 0, "",
991 "Display a list of all processes.\n\
992 \(Any processes listed as Exited or Signaled are actually eliminated\n\
993 after the listing is made.)")
996 internal_with_output_to_temp_buffer ("*Process List*",
997 list_processes_1
, Qnil
);
1001 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1002 "Return a list of all processes.")
1005 return Fmapcar (Qcdr
, Vprocess_alist
);
1008 /* Starting asynchronous inferior processes. */
1010 static Lisp_Object
start_process_unwind ();
1012 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1013 "Start a program in a subprocess. Return the process object for it.\n\
1014 Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\
1015 NAME is name for process. It is modified if necessary to make it unique.\n\
1016 BUFFER is the buffer or (buffer-name) to associate with the process.\n\
1017 Process output goes at end of that buffer, unless you specify\n\
1018 an output stream or filter function to handle the output.\n\
1019 BUFFER may be also nil, meaning that this process is not associated\n\
1021 Third arg is program file name. It is searched for as in the shell.\n\
1022 Remaining arguments are strings to give program as arguments.")
1025 register Lisp_Object
*args
;
1027 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1029 register unsigned char *new_argv
;
1032 register unsigned char **new_argv
;
1035 int count
= specpdl_ptr
- specpdl
;
1039 buffer
= Fget_buffer_create (buffer
);
1041 /* Make sure that the child will be able to chdir to the current
1042 buffer's current directory, or its unhandled equivalent. We
1043 can't just have the child check for an error when it does the
1044 chdir, since it's in a vfork.
1046 We have to GCPRO around this because Fexpand_file_name and
1047 Funhandled_file_name_directory might call a file name handling
1048 function. The argument list is protected by the caller, so all
1049 we really have to worry about is buffer. */
1051 struct gcpro gcpro1
, gcpro2
;
1053 current_dir
= current_buffer
->directory
;
1055 GCPRO2 (buffer
, current_dir
);
1058 = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir
),
1060 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1061 report_file_error ("Setting current directory",
1062 Fcons (current_buffer
->directory
, Qnil
));
1068 CHECK_STRING (name
, 0);
1072 CHECK_STRING (program
, 2);
1075 /* Make a one member argv with all args concatenated
1076 together separated by a blank. */
1077 len
= XSTRING (program
)->size
+ 2;
1078 for (i
= 3; i
< nargs
; i
++)
1081 CHECK_STRING (tem
, i
);
1082 len
+= XSTRING (tem
)->size
+ 1; /* count the blank */
1084 new_argv
= (unsigned char *) alloca (len
);
1085 strcpy (new_argv
, XSTRING (program
)->data
);
1086 for (i
= 3; i
< nargs
; i
++)
1089 CHECK_STRING (tem
, i
);
1090 strcat (new_argv
, " ");
1091 strcat (new_argv
, XSTRING (tem
)->data
);
1093 /* Need to add code here to check for program existence on VMS */
1096 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1098 /* If program file name is not absolute, search our path for it */
1099 if (!IS_DIRECTORY_SEP (XSTRING (program
)->data
[0])
1100 && !(XSTRING (program
)->size
> 1
1101 && IS_DEVICE_SEP (XSTRING (program
)->data
[1])))
1103 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1106 GCPRO4 (name
, program
, buffer
, current_dir
);
1107 openp (Vexec_path
, program
, EXEC_SUFFIXES
, &tem
, 1);
1110 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1111 tem
= Fexpand_file_name (tem
, Qnil
);
1112 new_argv
[0] = XSTRING (tem
)->data
;
1116 if (!NILP (Ffile_directory_p (program
)))
1117 error ("Specified program for new process is a directory");
1119 new_argv
[0] = XSTRING (program
)->data
;
1122 for (i
= 3; i
< nargs
; i
++)
1125 CHECK_STRING (tem
, i
);
1126 new_argv
[i
- 2] = XSTRING (tem
)->data
;
1128 new_argv
[i
- 2] = 0;
1129 #endif /* not VMS */
1131 proc
= make_process (name
);
1132 /* If an error occurs and we can't start the process, we want to
1133 remove it from the process list. This means that each error
1134 check in create_process doesn't need to call remove_process
1135 itself; it's all taken care of here. */
1136 record_unwind_protect (start_process_unwind
, proc
);
1138 XPROCESS (proc
)->childp
= Qt
;
1139 XPROCESS (proc
)->command_channel_p
= Qnil
;
1140 XPROCESS (proc
)->buffer
= buffer
;
1141 XPROCESS (proc
)->sentinel
= Qnil
;
1142 XPROCESS (proc
)->filter
= Qnil
;
1143 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1145 /* Make the process marker point into the process buffer (if any). */
1147 Fset_marker (XPROCESS (proc
)->mark
,
1148 make_number (BUF_ZV (XBUFFER (buffer
))), buffer
);
1150 create_process (proc
, new_argv
, current_dir
);
1152 return unbind_to (count
, proc
);
1155 /* This function is the unwind_protect form for Fstart_process. If
1156 PROC doesn't have its pid set, then we know someone has signaled
1157 an error and the process wasn't started successfully, so we should
1158 remove it from the process list. */
1160 start_process_unwind (proc
)
1163 if (!PROCESSP (proc
))
1166 /* Was PROC started successfully? */
1167 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1168 remove_process (proc
);
1175 create_process_1 (signo
)
1178 #if defined (USG) && !defined (POSIX_SIGNALS)
1179 /* USG systems forget handlers when they are used;
1180 must reestablish each time */
1181 signal (signo
, create_process_1
);
1185 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1188 /* Mimic blocking of signals on system V, which doesn't really have it. */
1190 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1191 int sigchld_deferred
;
1194 create_process_sigchld ()
1196 signal (SIGCHLD
, create_process_sigchld
);
1198 sigchld_deferred
= 1;
1204 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1205 create_process (process
, new_argv
, current_dir
)
1206 Lisp_Object process
;
1208 Lisp_Object current_dir
;
1210 int pid
, inchannel
, outchannel
;
1212 #ifdef POSIX_SIGNALS
1215 struct sigaction sigint_action
;
1216 struct sigaction sigquit_action
;
1218 struct sigaction sighup_action
;
1220 #else /* !POSIX_SIGNALS */
1222 SIGTYPE (*sigchld
)();
1224 #endif /* !POSIX_SIGNALS */
1225 /* Use volatile to protect variables from being clobbered by longjmp. */
1226 volatile int forkin
, forkout
;
1227 volatile int pty_flag
= 0;
1228 extern char **environ
;
1230 inchannel
= outchannel
= -1;
1233 if (!NILP (Vprocess_connection_type
))
1234 outchannel
= inchannel
= allocate_pty ();
1239 /* On USG systems it does not work to open the pty's tty here
1240 and then close and reopen it in the child. */
1242 /* Don't let this terminal become our controlling terminal
1243 (in case we don't have one). */
1244 forkout
= forkin
= open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1246 forkout
= forkin
= open (pty_name
, O_RDWR
, 0);
1249 report_file_error ("Opening pty", Qnil
);
1251 forkin
= forkout
= -1;
1252 #endif /* not USG */
1256 #endif /* HAVE_PTYS */
1259 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1260 report_file_error ("Opening socketpair", Qnil
);
1261 outchannel
= inchannel
= sv
[0];
1262 forkout
= forkin
= sv
[1];
1264 #else /* not SKTPAIR */
1273 #endif /* not SKTPAIR */
1276 /* Replaced by close_process_descs */
1277 set_exclusive_use (inchannel
);
1278 set_exclusive_use (outchannel
);
1281 /* Stride people say it's a mystery why this is needed
1282 as well as the O_NDELAY, but that it fails without this. */
1283 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1286 ioctl (inchannel
, FIONBIO
, &one
);
1291 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1292 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1295 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1296 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1300 /* Record this as an active process, with its channels.
1301 As a result, child_setup will close Emacs's side of the pipes. */
1302 chan_process
[inchannel
] = process
;
1303 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1304 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1305 /* Record the tty descriptor used in the subprocess. */
1307 XPROCESS (process
)->subtty
= Qnil
;
1309 XSETFASTINT (XPROCESS (process
)->subtty
, forkin
);
1310 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1311 XPROCESS (process
)->status
= Qrun
;
1313 /* Delay interrupts until we have a chance to store
1314 the new fork's pid in its process structure */
1315 #ifdef POSIX_SIGNALS
1316 sigemptyset (&blocked
);
1318 sigaddset (&blocked
, SIGCHLD
);
1321 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1322 this sets the parent's signal handlers as well as the child's.
1323 So delay all interrupts whose handlers the child might munge,
1324 and record the current handlers so they can be restored later. */
1325 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1326 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1328 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1330 #endif /* HAVE_VFORK */
1331 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1332 #else /* !POSIX_SIGNALS */
1336 #else /* not BSD4_1 */
1337 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1338 sigsetmask (sigmask (SIGCHLD
));
1339 #else /* ordinary USG */
1341 sigchld_deferred
= 0;
1342 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1344 #endif /* ordinary USG */
1345 #endif /* not BSD4_1 */
1346 #endif /* SIGCHLD */
1347 #endif /* !POSIX_SIGNALS */
1349 FD_SET (inchannel
, &input_wait_mask
);
1350 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1351 if (inchannel
> max_process_desc
)
1352 max_process_desc
= inchannel
;
1354 /* Until we store the proper pid, enable sigchld_handler
1355 to recognize an unknown pid as standing for this process.
1356 It is very important not to let this `marker' value stay
1357 in the table after this function has returned; if it does
1358 it might cause call-process to hang and subsequent asynchronous
1359 processes to get their return values scrambled. */
1360 XSETINT (XPROCESS (process
)->pid
, -1);
1363 /* child_setup must clobber environ on systems with true vfork.
1364 Protect it from permanent change. */
1365 char **save_environ
= environ
;
1370 #endif /* not WINDOWSNT */
1372 int xforkin
= forkin
;
1373 int xforkout
= forkout
;
1375 #if 0 /* This was probably a mistake--it duplicates code later on,
1376 but fails to handle all the cases. */
1377 /* Make sure SIGCHLD is not blocked in the child. */
1378 sigsetmask (SIGEMPTYMASK
);
1381 /* Make the pty be the controlling terminal of the process. */
1383 /* First, disconnect its current controlling terminal. */
1385 /* We tried doing setsid only if pty_flag, but it caused
1386 process_set_signal to fail on SGI when using a pipe. */
1388 /* Make the pty's terminal the controlling terminal. */
1392 /* We ignore the return value
1393 because faith@cs.unc.edu says that is necessary on Linux. */
1394 ioctl (xforkin
, TIOCSCTTY
, 0);
1397 #else /* not HAVE_SETSID */
1399 /* It's very important to call setpgrp here and no time
1400 afterwards. Otherwise, we lose our controlling tty which
1401 is set when we open the pty. */
1404 #endif /* not HAVE_SETSID */
1405 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1406 if (pty_flag
&& xforkin
>= 0)
1409 tcgetattr (xforkin
, &t
);
1411 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1412 write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1415 #if defined (NTTYDISC) && defined (TIOCSETD)
1416 if (pty_flag
&& xforkin
>= 0)
1418 /* Use new line discipline. */
1419 int ldisc
= NTTYDISC
;
1420 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1425 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1426 can do TIOCSPGRP only to the process's controlling tty. */
1429 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1430 I can't test it since I don't have 4.3. */
1431 int j
= open ("/dev/tty", O_RDWR
, 0);
1432 ioctl (j
, TIOCNOTTY
, 0);
1435 /* In order to get a controlling terminal on some versions
1436 of BSD, it is necessary to put the process in pgrp 0
1437 before it opens the terminal. */
1445 #endif /* TIOCNOTTY */
1447 #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY)
1448 /*** There is a suggestion that this ought to be a
1449 conditional on TIOCSPGRP,
1450 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1451 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1452 that system does seem to need this code, even though
1453 both HAVE_SETSID and TIOCSCTTY are defined. */
1454 /* Now close the pty (if we had it open) and reopen it.
1455 This makes the pty the controlling terminal of the subprocess. */
1458 #ifdef SET_CHILD_PTY_PGRP
1459 int pgrp
= getpid ();
1462 /* I wonder if close (open (pty_name, ...)) would work? */
1465 xforkout
= xforkin
= open (pty_name
, O_RDWR
, 0);
1469 write (1, "Couldn't open the pty terminal ", 31);
1470 write (1, pty_name
, strlen (pty_name
));
1475 #ifdef SET_CHILD_PTY_PGRP
1476 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1477 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1480 #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */
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_SYSTEM) || 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_SYSTEM) || 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
;
2515 int outer_running_asynch_code
= running_asynch_code
;
2517 /* No need to gcpro these, because all we do with them later
2518 is test them for EQness, and none of them should be a string. */
2519 odeactivate
= Vdeactivate_mark
;
2520 XSETBUFFER (obuffer
, current_buffer
);
2521 okeymap
= current_buffer
->keymap
;
2523 specbind (Qinhibit_quit
, Qt
);
2524 specbind (Qlast_nonmenu_event
, Qt
);
2526 /* In case we get recursively called,
2527 and we already saved the match data nonrecursively,
2528 save the same match data in safely recursive fashion. */
2529 if (outer_running_asynch_code
)
2532 /* Don't clobber the CURRENT match data, either! */
2533 tem
= Fmatch_data (Qnil
, Qnil
);
2534 restore_match_data ();
2535 record_unwind_protect (Fstore_match_data
, Fmatch_data (Qnil
, Qnil
));
2536 Fstore_match_data (tem
);
2539 /* For speed, if a search happens within this code,
2540 save the match data in a special nonrecursive fashion. */
2541 running_asynch_code
= 1;
2543 /* Read and dispose of the process output. */
2544 internal_condition_case_1 (read_process_output_call
,
2547 Fcons (make_string (chars
,
2550 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
2551 read_process_output_error_handler
);
2553 /* If we saved the match data nonrecursively, restore it now. */
2554 restore_match_data ();
2555 running_asynch_code
= outer_running_asynch_code
;
2557 /* Handling the process output should not deactivate the mark. */
2558 Vdeactivate_mark
= odeactivate
;
2560 #if 0 /* Call record_asynch_buffer_change unconditionally,
2561 because we might have changed minor modes or other things
2562 that affect key bindings. */
2563 if (! EQ (Fcurrent_buffer (), obuffer
)
2564 || ! EQ (current_buffer
->keymap
, okeymap
))
2566 /* But do it only if the caller is actually going to read events.
2567 Otherwise there's no need to make him wake up, and it could
2568 cause trouble (for example it would make Fsit_for return). */
2569 if (waiting_for_user_input_p
== -1)
2570 record_asynch_buffer_change ();
2573 start_vms_process_read (vs
);
2575 unbind_to (count
, Qnil
);
2579 /* If no filter, write into buffer if it isn't dead. */
2580 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2582 Lisp_Object old_read_only
;
2583 Lisp_Object old_begv
, old_zv
;
2584 Lisp_Object odeactivate
;
2586 odeactivate
= Vdeactivate_mark
;
2588 Fset_buffer (p
->buffer
);
2590 old_read_only
= current_buffer
->read_only
;
2591 XSETFASTINT (old_begv
, BEGV
);
2592 XSETFASTINT (old_zv
, ZV
);
2594 current_buffer
->read_only
= Qnil
;
2596 /* Insert new output into buffer
2597 at the current end-of-output marker,
2598 thus preserving logical ordering of input and output. */
2599 if (XMARKER (p
->mark
)->buffer
)
2600 SET_PT (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
));
2604 /* If the output marker is outside of the visible region, save
2605 the restriction and widen. */
2606 if (! (BEGV
<= PT
&& PT
<= ZV
))
2609 /* Make sure opoint floats ahead of any new text, just as point
2614 /* Insert after old_begv, but before old_zv. */
2615 if (PT
< XFASTINT (old_begv
))
2616 XSETFASTINT (old_begv
, XFASTINT (old_begv
) + nchars
);
2617 if (PT
<= XFASTINT (old_zv
))
2618 XSETFASTINT (old_zv
, XFASTINT (old_zv
) + nchars
);
2620 /* Insert before markers in case we are inserting where
2621 the buffer's mark is, and the user's next command is Meta-y. */
2622 insert_before_markers (chars
, nchars
);
2623 Fset_marker (p
->mark
, make_number (PT
), p
->buffer
);
2625 update_mode_lines
++;
2627 /* If the restriction isn't what it should be, set it. */
2628 if (XFASTINT (old_begv
) != BEGV
|| XFASTINT (old_zv
) != ZV
)
2629 Fnarrow_to_region (old_begv
, old_zv
);
2631 /* Handling the process output should not deactivate the mark. */
2632 Vdeactivate_mark
= odeactivate
;
2634 current_buffer
->read_only
= old_read_only
;
2636 set_buffer_internal (old
);
2639 start_vms_process_read (vs
);
2644 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
2646 "Returns non-nil if emacs is waiting for input from the user.\n\
2647 This is intended for use by asynchronous process output filters and sentinels.")
2650 return (waiting_for_user_input_p
? Qt
: Qnil
);
2653 /* Sending data to subprocess */
2655 jmp_buf send_process_frame
;
2658 send_process_trap ()
2664 longjmp (send_process_frame
, 1);
2667 /* Send some data to process PROC.
2668 BUF is the beginning of the data; LEN is the number of characters.
2669 OBJECT is the Lisp object that the data comes from. */
2671 send_process (proc
, buf
, len
, object
)
2672 volatile Lisp_Object proc
;
2677 /* Use volatile to protect variables from being clobbered by longjmp. */
2679 volatile unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
2680 struct gcpro gcpro1
;
2685 struct Lisp_Process
*p
= XPROCESS (proc
);
2686 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2689 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2690 update_status (XPROCESS (proc
));
2691 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2692 error ("Process %s not running", procname
);
2695 vs
= get_vms_process_pointer (p
->pid
);
2697 error ("Could not find this process: %x", p
->pid
);
2698 else if (write_to_vms_process (vs
, buf
, len
))
2702 if (pty_max_bytes
== 0)
2704 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
2705 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
2707 if (pty_max_bytes
< 0)
2708 pty_max_bytes
= 250;
2710 pty_max_bytes
= 250;
2712 /* Deduct one, to leave space for the eof. */
2716 if (!setjmp (send_process_frame
))
2720 SIGTYPE (*old_sigpipe
)();
2723 /* Decide how much data we can send in one batch.
2724 Long lines need to be split into multiple batches. */
2725 if (!NILP (XPROCESS (proc
)->pty_flag
))
2727 /* Starting this at zero is always correct when not the first iteration
2728 because the previous iteration ended by sending C-d.
2729 It may not be correct for the first iteration
2730 if a partial line was sent in a separate send_process call.
2731 If that proves worth handling, we need to save linepos
2732 in the process object. */
2735 char *end
= buf
+ len
;
2737 /* Scan through this text for a line that is too long. */
2738 while (ptr
!= end
&& linepos
< pty_max_bytes
)
2746 /* If we found one, break the line there
2747 and put in a C-d to force the buffer through. */
2751 /* Send this batch, using one or more write calls. */
2754 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
2755 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
2756 signal (SIGPIPE
, old_sigpipe
);
2762 || errno
== EWOULDBLOCK
2768 /* Buffer is full. Wait, accepting input;
2769 that may allow the program
2770 to finish doing output and read more. */
2775 /* Running filters might relocate buffers or strings.
2776 Arrange to relocate BUF. */
2777 if (BUFFERP (object
))
2778 offset
= BUF_PTR_CHAR_POS (XBUFFER (object
),
2779 (unsigned char *) buf
);
2780 else if (STRINGP (object
))
2781 offset
= buf
- (char *) XSTRING (object
)->data
;
2783 XSETFASTINT (zero
, 0);
2784 #ifdef EMACS_HAS_USECS
2785 wait_reading_process_input (0, 20000, zero
, 0);
2787 wait_reading_process_input (1, 0, zero
, 0);
2790 if (BUFFERP (object
))
2791 buf
= (char *) BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
2792 else if (STRINGP (object
))
2793 buf
= offset
+ (char *) XSTRING (object
)->data
;
2798 /* This is a real error. */
2799 report_file_error ("writing to process", Fcons (proc
, Qnil
));
2806 /* If we sent just part of the string, put in an EOF
2807 to force it through, before we send the rest. */
2809 Fprocess_send_eof (proc
);
2814 XPROCESS (proc
)->raw_status_low
= Qnil
;
2815 XPROCESS (proc
)->raw_status_high
= Qnil
;
2816 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2817 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2818 deactivate_process (proc
);
2820 error ("Error writing to process %s; closed it", procname
);
2822 error ("SIGPIPE raised on process %s; closed it", procname
);
2829 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
2831 "Send current contents of region as input to PROCESS.\n\
2832 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2833 nil, indicating the current buffer's process.\n\
2834 Called from program, takes three arguments, PROCESS, START and END.\n\
2835 If the region is more than 500 characters long,\n\
2836 it is sent in several bunches. This may happen even for shorter regions.\n\
2837 Output from processes can arrive in between bunches.")
2838 (process
, start
, end
)
2839 Lisp_Object process
, start
, end
;
2844 proc
= get_process (process
);
2845 validate_region (&start
, &end
);
2847 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
2850 start1
= XINT (start
);
2851 send_process (proc
, &FETCH_CHAR (start1
), XINT (end
) - XINT (start
),
2852 Fcurrent_buffer ());
2857 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
2859 "Send PROCESS the contents of STRING as input.\n\
2860 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2861 nil, indicating the current buffer's process.\n\
2862 If STRING is more than 500 characters long,\n\
2863 it is sent in several bunches. This may happen even for shorter strings.\n\
2864 Output from processes can arrive in between bunches.")
2866 Lisp_Object process
, string
;
2869 CHECK_STRING (string
, 1);
2870 proc
= get_process (process
);
2871 send_process (proc
, XSTRING (string
)->data
, XSTRING (string
)->size
, string
);
2875 /* send a signal number SIGNO to PROCESS.
2876 CURRENT_GROUP means send to the process group that currently owns
2877 the terminal being used to communicate with PROCESS.
2878 This is used for various commands in shell mode.
2879 If NOMSG is zero, insert signal-announcements into process's buffers
2882 If we can, we try to signal PROCESS by sending control characters
2883 down the pty. This allows us to signal inferiors who have changed
2884 their uid, for which killpg would return an EPERM error. */
2887 process_send_signal (process
, signo
, current_group
, nomsg
)
2888 Lisp_Object process
;
2890 Lisp_Object current_group
;
2894 register struct Lisp_Process
*p
;
2898 proc
= get_process (process
);
2899 p
= XPROCESS (proc
);
2901 if (!EQ (p
->childp
, Qt
))
2902 error ("Process %s is not a subprocess",
2903 XSTRING (p
->name
)->data
);
2904 if (XINT (p
->infd
) < 0)
2905 error ("Process %s is not active",
2906 XSTRING (p
->name
)->data
);
2908 if (NILP (p
->pty_flag
))
2909 current_group
= Qnil
;
2911 /* If we are using pgrps, get a pgrp number and make it negative. */
2912 if (!NILP (current_group
))
2914 #ifdef SIGNALS_VIA_CHARACTERS
2915 /* If possible, send signals to the entire pgrp
2916 by sending an input character to it. */
2918 /* TERMIOS is the latest and bestest, and seems most likely to
2919 work. If the system has it, use it. */
2926 tcgetattr (XINT (p
->infd
), &t
);
2927 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2931 tcgetattr (XINT (p
->infd
), &t
);
2932 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2936 tcgetattr (XINT (p
->infd
), &t
);
2937 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
2938 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2940 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
2945 #else /* ! HAVE_TERMIOS */
2947 /* On Berkeley descendants, the following IOCTL's retrieve the
2948 current control characters. */
2949 #if defined (TIOCGLTC) && defined (TIOCGETC)
2957 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2958 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
2961 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2962 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
2966 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
2967 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
2969 #endif /* ! defined (SIGTSTP) */
2972 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2974 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
2981 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2982 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2985 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2986 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2990 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2991 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2993 #endif /* ! defined (SIGTSTP) */
2995 #else /* ! defined (TCGETA) */
2996 Your configuration files are messed up
.
2997 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
2998 you'd better be using one of the alternatives above! */
2999 #endif /* ! defined (TCGETA) */
3000 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
3001 #endif /* ! defined HAVE_TERMIOS */
3002 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
3005 /* Get the pgrp using the tty itself, if we have that.
3006 Otherwise, use the pty to get the pgrp.
3007 On pfa systems, saka@pfu.fujitsu.co.JP writes:
3008 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
3009 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
3010 His patch indicates that if TIOCGPGRP returns an error, then
3011 we should just assume that p->pid is also the process group id. */
3015 if (!NILP (p
->subtty
))
3016 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
3018 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
3022 gid
= - XFASTINT (p
->pid
);
3023 #endif /* ! defined (pfa) */
3029 #else /* ! defined (TIOCGPGRP ) */
3030 /* Can't select pgrps on this system, so we know that
3031 the child itself heads the pgrp. */
3032 gid
= - XFASTINT (p
->pid
);
3033 #endif /* ! defined (TIOCGPGRP ) */
3036 gid
= - XFASTINT (p
->pid
);
3042 p
->raw_status_low
= Qnil
;
3043 p
->raw_status_high
= Qnil
;
3045 XSETINT (p
->tick
, ++process_tick
);
3049 #endif /* ! defined (SIGCONT) */
3052 send_process (proc
, "\003", 1, Qnil
); /* ^C */
3057 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
3062 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
3065 flush_pending_output (XINT (p
->infd
));
3069 /* If we don't have process groups, send the signal to the immediate
3070 subprocess. That isn't really right, but it's better than any
3071 obvious alternative. */
3074 kill (XFASTINT (p
->pid
), signo
);
3078 /* gid may be a pid, or minus a pgrp's number */
3080 if (!NILP (current_group
))
3081 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
3084 gid
= - XFASTINT (p
->pid
);
3087 #else /* ! defined (TIOCSIGSEND) */
3088 EMACS_KILLPG (-gid
, signo
);
3089 #endif /* ! defined (TIOCSIGSEND) */
3092 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
3093 "Interrupt process PROCESS. May be process or name of one.\n\
3094 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
3095 nil or no arg means current buffer's process.\n\
3096 Second arg CURRENT-GROUP non-nil means send signal to\n\
3097 the current process-group of the process's controlling terminal\n\
3098 rather than to the process's own process group.\n\
3099 If the process is a shell, this means interrupt current subjob\n\
3100 rather than the shell.")
3101 (process
, current_group
)
3102 Lisp_Object process
, current_group
;
3104 process_send_signal (process
, SIGINT
, current_group
, 0);
3108 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
3109 "Kill process PROCESS. May be process or name of one.\n\
3110 See function `interrupt-process' for more details on usage.")
3111 (process
, current_group
)
3112 Lisp_Object process
, current_group
;
3114 process_send_signal (process
, SIGKILL
, current_group
, 0);
3118 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
3119 "Send QUIT signal to 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
;
3124 process_send_signal (process
, SIGQUIT
, current_group
, 0);
3128 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
3129 "Stop process PROCESS. May be process or name of one.\n\
3130 See function `interrupt-process' for more details on usage.")
3131 (process
, current_group
)
3132 Lisp_Object process
, current_group
;
3135 error ("no SIGTSTP support");
3137 process_send_signal (process
, SIGTSTP
, current_group
, 0);
3142 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
3143 "Continue process PROCESS. May be process or name of one.\n\
3144 See function `interrupt-process' for more details on usage.")
3145 (process
, current_group
)
3146 Lisp_Object process
, current_group
;
3149 process_send_signal (process
, SIGCONT
, current_group
, 0);
3151 error ("no SIGCONT support");
3156 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
3157 2, 2, "nProcess number: \nnSignal code: ",
3158 "Send the process with process id PID the signal with code SIGCODE.\n\
3159 PID must be an integer. The process need not be a child of this Emacs.\n\
3160 SIGCODE may be an integer, or a symbol whose name is a signal name.")
3162 Lisp_Object pid
, sigcode
;
3164 CHECK_NUMBER (pid
, 0);
3166 #define handle_signal(NAME, VALUE) \
3167 else if (!strcmp (name, NAME)) \
3168 XSETINT (sigcode, VALUE)
3170 if (INTEGERP (sigcode
))
3174 unsigned char *name
;
3176 CHECK_SYMBOL (sigcode
, 1);
3177 name
= XSYMBOL (sigcode
)->name
->data
;
3182 handle_signal ("SIGHUP", SIGHUP
);
3185 handle_signal ("SIGINT", SIGINT
);
3188 handle_signal ("SIGQUIT", SIGQUIT
);
3191 handle_signal ("SIGILL", SIGILL
);
3194 handle_signal ("SIGABRT", SIGABRT
);
3197 handle_signal ("SIGEMT", SIGEMT
);
3200 handle_signal ("SIGKILL", SIGKILL
);
3203 handle_signal ("SIGFPE", SIGFPE
);
3206 handle_signal ("SIGBUS", SIGBUS
);
3209 handle_signal ("SIGSEGV", SIGSEGV
);
3212 handle_signal ("SIGSYS", SIGSYS
);
3215 handle_signal ("SIGPIPE", SIGPIPE
);
3218 handle_signal ("SIGALRM", SIGALRM
);
3221 handle_signal ("SIGTERM", SIGTERM
);
3224 handle_signal ("SIGURG", SIGURG
);
3227 handle_signal ("SIGSTOP", SIGSTOP
);
3230 handle_signal ("SIGTSTP", SIGTSTP
);
3233 handle_signal ("SIGCONT", SIGCONT
);
3236 handle_signal ("SIGCHLD", SIGCHLD
);
3239 handle_signal ("SIGTTIN", SIGTTIN
);
3242 handle_signal ("SIGTTOU", SIGTTOU
);
3245 handle_signal ("SIGIO", SIGIO
);
3248 handle_signal ("SIGXCPU", SIGXCPU
);
3251 handle_signal ("SIGXFSZ", SIGXFSZ
);
3254 handle_signal ("SIGVTALRM", SIGVTALRM
);
3257 handle_signal ("SIGPROF", SIGPROF
);
3260 handle_signal ("SIGWINCH", SIGWINCH
);
3263 handle_signal ("SIGINFO", SIGINFO
);
3266 handle_signal ("SIGUSR1", SIGUSR1
);
3269 handle_signal ("SIGUSR2", SIGUSR2
);
3272 error ("Undefined signal name %s", name
);
3275 #undef handle_signal
3277 return make_number (kill (XINT (pid
), XINT (sigcode
)));
3280 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
3281 "Make PROCESS see end-of-file in its input.\n\
3282 Eof comes after any text already sent to it.\n\
3283 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3284 nil, indicating the current buffer's process.\n\
3285 If PROCESS is a network connection, or is a process communicating\n\
3286 through a pipe (as opposed to a pty), then you cannot send any more\n\
3287 text to PROCESS after you call this function.")
3289 Lisp_Object process
;
3293 proc
= get_process (process
);
3295 /* Make sure the process is really alive. */
3296 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3297 update_status (XPROCESS (proc
));
3298 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3299 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
3302 send_process (proc
, "\032", 1, Qnil
); /* ^z */
3304 if (!NILP (XPROCESS (proc
)->pty_flag
))
3305 send_process (proc
, "\004", 1, Qnil
);
3308 close (XINT (XPROCESS (proc
)->outfd
));
3309 XSETINT (XPROCESS (proc
)->outfd
, open (NULL_DEVICE
, O_WRONLY
));
3315 /* Kill all processes associated with `buffer'.
3316 If `buffer' is nil, kill all processes */
3318 kill_buffer_processes (buffer
)
3321 Lisp_Object tail
, proc
;
3323 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3325 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3326 if (GC_PROCESSP (proc
)
3327 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
3329 if (NETCONN_P (proc
))
3330 Fdelete_process (proc
);
3331 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
3332 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
3337 /* On receipt of a signal that a child status has changed,
3338 loop asking about children with changed statuses until
3339 the system says there are no more.
3340 All we do is change the status;
3341 we do not run sentinels or print notifications.
3342 That is saved for the next time keyboard input is done,
3343 in order to avoid timing errors. */
3345 /** WARNING: this can be called during garbage collection.
3346 Therefore, it must not be fooled by the presence of mark bits in
3349 /** USG WARNING: Although it is not obvious from the documentation
3350 in signal(2), on a USG system the SIGCLD handler MUST NOT call
3351 signal() before executing at least one wait(), otherwise the handler
3352 will be called again, resulting in an infinite loop. The relevant
3353 portion of the documentation reads "SIGCLD signals will be queued
3354 and the signal-catching function will be continually reentered until
3355 the queue is empty". Invoking signal() causes the kernel to reexamine
3356 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
3359 sigchld_handler (signo
)
3362 int old_errno
= errno
;
3364 register struct Lisp_Process
*p
;
3365 extern EMACS_TIME
*input_available_clear_time
;
3369 sigheld
|= sigbit (SIGCHLD
);
3381 #endif /* no WUNTRACED */
3382 /* Keep trying to get a status until we get a definitive result. */
3386 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
3388 while (pid
<= 0 && errno
== EINTR
);
3392 /* A real failure. We have done all our job, so return. */
3394 /* USG systems forget handlers when they are used;
3395 must reestablish each time */
3396 #if defined (USG) && !defined (POSIX_SIGNALS)
3397 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
3400 sigheld
&= ~sigbit (SIGCHLD
);
3408 #endif /* no WNOHANG */
3410 /* Find the process that signaled us, and record its status. */
3413 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3415 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3416 p
= XPROCESS (proc
);
3417 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
3422 /* Look for an asynchronous process whose pid hasn't been filled
3425 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3427 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3428 p
= XPROCESS (proc
);
3429 if (INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
3434 /* Change the status of the process that was found. */
3437 union { int i
; WAITTYPE wt
; } u
;
3438 int clear_desc_flag
= 0;
3440 XSETINT (p
->tick
, ++process_tick
);
3442 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
3443 XSETINT (p
->raw_status_high
, u
.i
>> 16);
3445 /* If process has terminated, stop waiting for its output. */
3446 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
3447 && XINT (p
->infd
) >= 0)
3448 clear_desc_flag
= 1;
3450 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
3451 if (clear_desc_flag
)
3453 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
3454 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
3457 /* Tell wait_reading_process_input that it needs to wake up and
3459 if (input_available_clear_time
)
3460 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3463 /* There was no asynchronous process found for that id. Check
3464 if we have a synchronous process. */
3467 synch_process_alive
= 0;
3469 /* Report the status of the synchronous process. */
3471 synch_process_retcode
= WRETCODE (w
);
3472 else if (WIFSIGNALED (w
))
3474 int code
= WTERMSIG (w
);
3480 /* Suppress warning if the table has const char *. */
3481 signame
= (char *) sys_siglist
[code
];
3483 signame
= sys_errlist
[code
];
3487 signame
= "unknown";
3489 synch_process_death
= signame
;
3492 /* Tell wait_reading_process_input that it needs to wake up and
3494 if (input_available_clear_time
)
3495 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3498 /* On some systems, we must return right away.
3499 If any more processes want to signal us, we will
3501 Otherwise (on systems that have WNOHANG), loop around
3502 to use up all the processes that have something to tell us. */
3503 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT)
3504 #if defined (USG) && ! defined (POSIX_SIGNALS)
3505 signal (signo
, sigchld_handler
);
3509 #endif /* USG, but not HPUX with WNOHANG */
3515 exec_sentinel_unwind (data
)
3518 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
3523 exec_sentinel_error_handler (error
)
3526 cmd_error_internal (error
, "error in process sentinel: ");
3528 update_echo_area ();
3529 Fsleep_for (make_number (2), Qnil
);
3533 exec_sentinel (proc
, reason
)
3534 Lisp_Object proc
, reason
;
3536 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
3537 register struct Lisp_Process
*p
= XPROCESS (proc
);
3538 int count
= specpdl_ptr
- specpdl
;
3539 int outer_running_asynch_code
= running_asynch_code
;
3541 /* No need to gcpro these, because all we do with them later
3542 is test them for EQness, and none of them should be a string. */
3543 odeactivate
= Vdeactivate_mark
;
3544 XSETBUFFER (obuffer
, current_buffer
);
3545 okeymap
= current_buffer
->keymap
;
3547 sentinel
= p
->sentinel
;
3548 if (NILP (sentinel
))
3551 /* Zilch the sentinel while it's running, to avoid recursive invocations;
3552 assure that it gets restored no matter how the sentinel exits. */
3554 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
3555 /* Inhibit quit so that random quits don't screw up a running filter. */
3556 specbind (Qinhibit_quit
, Qt
);
3557 specbind (Qlast_nonmenu_event
, Qt
);
3559 /* In case we get recursively called,
3560 and we already saved the match data nonrecursively,
3561 save the same match data in safely recursive fashion. */
3562 if (outer_running_asynch_code
)
3565 tem
= Fmatch_data (Qnil
, Qnil
);
3566 restore_match_data ();
3567 record_unwind_protect (Fstore_match_data
, Fmatch_data (Qnil
, Qnil
));
3568 Fstore_match_data (tem
);
3571 /* For speed, if a search happens within this code,
3572 save the match data in a special nonrecursive fashion. */
3573 running_asynch_code
= 1;
3575 internal_condition_case_1 (read_process_output_call
,
3577 Fcons (proc
, Fcons (reason
, Qnil
))),
3578 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
3579 exec_sentinel_error_handler
);
3581 /* If we saved the match data nonrecursively, restore it now. */
3582 restore_match_data ();
3583 running_asynch_code
= outer_running_asynch_code
;
3585 Vdeactivate_mark
= odeactivate
;
3587 if (! EQ (Fcurrent_buffer (), obuffer
)
3588 || ! EQ (current_buffer
->keymap
, okeymap
))
3590 /* But do it only if the caller is actually going to read events.
3591 Otherwise there's no need to make him wake up, and it could
3592 cause trouble (for example it would make Fsit_for return). */
3593 if (waiting_for_user_input_p
== -1)
3594 record_asynch_buffer_change ();
3596 unbind_to (count
, Qnil
);
3599 /* Report all recent events of a change in process status
3600 (either run the sentinel or output a message).
3601 This is done while Emacs is waiting for keyboard input. */
3605 register Lisp_Object proc
, buffer
;
3606 Lisp_Object tail
, msg
;
3607 struct gcpro gcpro1
, gcpro2
;
3611 /* We need to gcpro tail; if read_process_output calls a filter
3612 which deletes a process and removes the cons to which tail points
3613 from Vprocess_alist, and then causes a GC, tail is an unprotected
3617 /* Set this now, so that if new processes are created by sentinels
3618 that we run, we get called again to handle their status changes. */
3619 update_tick
= process_tick
;
3621 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
3624 register struct Lisp_Process
*p
;
3626 proc
= Fcdr (Fcar (tail
));
3627 p
= XPROCESS (proc
);
3629 if (XINT (p
->tick
) != XINT (p
->update_tick
))
3631 XSETINT (p
->update_tick
, XINT (p
->tick
));
3633 /* If process is still active, read any output that remains. */
3634 while (! EQ (p
->filter
, Qt
)
3635 && XINT (p
->infd
) >= 0
3636 && read_process_output (proc
, XINT (p
->infd
)) > 0);
3640 /* Get the text to use for the message. */
3641 if (!NILP (p
->raw_status_low
))
3643 msg
= status_message (p
->status
);
3645 /* If process is terminated, deactivate it or delete it. */
3647 if (CONSP (p
->status
))
3648 symbol
= XCONS (p
->status
)->car
;
3650 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
3651 || EQ (symbol
, Qclosed
))
3653 if (delete_exited_processes
)
3654 remove_process (proc
);
3656 deactivate_process (proc
);
3659 /* The actions above may have further incremented p->tick.
3660 So set p->update_tick again
3661 so that an error in the sentinel will not cause
3662 this code to be run again. */
3663 XSETINT (p
->update_tick
, XINT (p
->tick
));
3664 /* Now output the message suitably. */
3665 if (!NILP (p
->sentinel
))
3666 exec_sentinel (proc
, msg
);
3667 /* Don't bother with a message in the buffer
3668 when a process becomes runnable. */
3669 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
3671 Lisp_Object ro
, tem
;
3672 struct buffer
*old
= current_buffer
;
3675 ro
= XBUFFER (buffer
)->read_only
;
3677 /* Avoid error if buffer is deleted
3678 (probably that's why the process is dead, too) */
3679 if (NILP (XBUFFER (buffer
)->name
))
3681 Fset_buffer (buffer
);
3683 /* Insert new output into buffer
3684 at the current end-of-output marker,
3685 thus preserving logical ordering of input and output. */
3686 if (XMARKER (p
->mark
)->buffer
)
3687 SET_PT (marker_position (p
->mark
));
3691 opoint
+= XSTRING (msg
)->size
+ XSTRING (p
->name
)->size
+ 10;
3693 tem
= current_buffer
->read_only
;
3694 current_buffer
->read_only
= Qnil
;
3695 insert_string ("\nProcess ");
3696 Finsert (1, &p
->name
);
3697 insert_string (" ");
3699 current_buffer
->read_only
= tem
;
3700 Fset_marker (p
->mark
, make_number (PT
), p
->buffer
);
3703 set_buffer_internal (old
);
3708 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
3709 redisplay_preserve_echo_area ();
3714 /* The first time this is called, assume keyboard input comes from DESC
3715 instead of from where we used to expect it.
3716 Subsequent calls mean assume input keyboard can come from DESC
3717 in addition to other places. */
3719 static int add_keyboard_wait_descriptor_called_flag
;
3722 add_keyboard_wait_descriptor (desc
)
3725 if (! add_keyboard_wait_descriptor_called_flag
)
3726 FD_CLR (0, &input_wait_mask
);
3727 add_keyboard_wait_descriptor_called_flag
= 1;
3728 FD_SET (desc
, &input_wait_mask
);
3729 if (desc
> max_keyboard_desc
)
3730 max_keyboard_desc
= desc
;
3733 /* From now on, do not expect DESC to give keyboard input. */
3736 delete_keyboard_wait_descriptor (desc
)
3740 int lim
= max_keyboard_desc
;
3742 FD_CLR (desc
, &input_wait_mask
);
3744 if (desc
== max_keyboard_desc
)
3745 for (fd
= 0; fd
< lim
; fd
++)
3746 if (FD_ISSET (fd
, &input_wait_mask
)
3747 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3748 max_keyboard_desc
= fd
;
3751 /* Return nonzero if *MASK has a bit set
3752 that corresponds to one of the keyboard input descriptors. */
3755 keyboard_bit_set (mask
)
3760 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
3761 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
3762 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3774 if (! noninteractive
|| initialized
)
3776 signal (SIGCHLD
, sigchld_handler
);
3779 FD_ZERO (&input_wait_mask
);
3780 FD_ZERO (&non_keyboard_wait_mask
);
3781 max_process_desc
= 0;
3783 FD_SET (0, &input_wait_mask
);
3785 Vprocess_alist
= Qnil
;
3786 for (i
= 0; i
< MAXDESC
; i
++)
3788 chan_process
[i
] = Qnil
;
3789 proc_buffered_char
[i
] = -1;
3795 Qprocessp
= intern ("processp");
3796 staticpro (&Qprocessp
);
3797 Qrun
= intern ("run");
3799 Qstop
= intern ("stop");
3801 Qsignal
= intern ("signal");
3802 staticpro (&Qsignal
);
3804 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
3807 Qexit = intern ("exit");
3808 staticpro (&Qexit); */
3810 Qopen
= intern ("open");
3812 Qclosed
= intern ("closed");
3813 staticpro (&Qclosed
);
3815 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
3816 staticpro (&Qlast_nonmenu_event
);
3818 staticpro (&Vprocess_alist
);
3820 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
3821 "*Non-nil means delete processes immediately when they exit.\n\
3822 nil means don't delete them until `list-processes' is run.");
3824 delete_exited_processes
= 1;
3826 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
3827 "Control type of device used to communicate with subprocesses.\n\
3828 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
3829 The value has no effect if the system has no ptys or if all ptys are busy:\n\
3830 then a pipe is used in any case.\n\
3831 The value takes effect when `start-process' is called.");
3832 Vprocess_connection_type
= Qt
;
3834 defsubr (&Sprocessp
);
3835 defsubr (&Sget_process
);
3836 defsubr (&Sget_buffer_process
);
3837 defsubr (&Sdelete_process
);
3838 defsubr (&Sprocess_status
);
3839 defsubr (&Sprocess_exit_status
);
3840 defsubr (&Sprocess_id
);
3841 defsubr (&Sprocess_name
);
3842 defsubr (&Sprocess_tty_name
);
3843 defsubr (&Sprocess_command
);
3844 defsubr (&Sset_process_buffer
);
3845 defsubr (&Sprocess_buffer
);
3846 defsubr (&Sprocess_mark
);
3847 defsubr (&Sset_process_filter
);
3848 defsubr (&Sprocess_filter
);
3849 defsubr (&Sset_process_sentinel
);
3850 defsubr (&Sprocess_sentinel
);
3851 defsubr (&Sset_process_window_size
);
3852 defsubr (&Sprocess_kill_without_query
);
3853 defsubr (&Sprocess_contact
);
3854 defsubr (&Slist_processes
);
3855 defsubr (&Sprocess_list
);
3856 defsubr (&Sstart_process
);
3858 defsubr (&Sopen_network_stream
);
3859 #endif /* HAVE_SOCKETS */
3860 defsubr (&Saccept_process_output
);
3861 defsubr (&Sprocess_send_region
);
3862 defsubr (&Sprocess_send_string
);
3863 defsubr (&Sinterrupt_process
);
3864 defsubr (&Skill_process
);
3865 defsubr (&Squit_process
);
3866 defsubr (&Sstop_process
);
3867 defsubr (&Scontinue_process
);
3868 defsubr (&Sprocess_send_eof
);
3869 defsubr (&Ssignal_process
);
3870 defsubr (&Swaiting_for_user_input_p
);
3871 /* defsubr (&Sprocess_connection); */
3875 #else /* not subprocesses */
3877 #include <sys/types.h>
3881 #include "systime.h"
3882 #include "termopts.h"
3883 #include "sysselect.h"
3885 extern int frame_garbaged
;
3887 extern EMACS_TIME
timer_check ();
3888 extern int timers_run
;
3890 /* As described above, except assuming that there are no subprocesses:
3892 Wait for timeout to elapse and/or keyboard input to be available.
3895 timeout in seconds, or
3896 zero for no limit, or
3897 -1 means gobble data immediately available but don't wait for any.
3899 read_kbd is a Lisp_Object:
3900 0 to ignore keyboard input, or
3901 1 to return when input is available, or
3902 -1 means caller will actually read the input, so don't throw to
3904 a cons cell, meaning wait until its car is non-nil
3905 (and gobble terminal input into the buffer if any arrives), or
3906 We know that read_kbd will never be a Lisp_Process, since
3907 `subprocesses' isn't defined.
3909 do_display != 0 means redisplay should be done to show subprocess
3910 output that arrives.
3912 Return true iff we received input from any process. */
3915 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
3916 int time_limit
, microsecs
;
3917 Lisp_Object read_kbd
;
3920 EMACS_TIME end_time
, timeout
;
3921 SELECT_TYPE waitchannels
;
3923 Lisp_Object
*wait_for_cell
= 0;
3925 /* If waiting for non-nil in a cell, record where. */
3926 if (CONSP (read_kbd
))
3928 wait_for_cell
= &XCONS (read_kbd
)->car
;
3929 XSETFASTINT (read_kbd
, 0);
3932 /* What does time_limit really mean? */
3933 if (time_limit
|| microsecs
)
3935 if (time_limit
== -1)
3936 /* In fact, it's zero. */
3937 EMACS_SET_SECS_USECS (timeout
, 0, 0);
3939 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
3941 /* How far in the future is that? */
3942 EMACS_GET_TIME (end_time
);
3943 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
3946 /* It's infinite. */
3947 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
3949 /* Turn off periodic alarms (in case they are in use)
3950 because the select emulator uses alarms. */
3956 int timeout_reduced_for_timers
= 0;
3958 /* If calling from keyboard input, do not quit
3959 since we want to return C-g as an input character.
3960 Otherwise, do pending quit if requested. */
3961 if (XINT (read_kbd
) >= 0)
3964 /* Exit now if the cell we're waiting for became non-nil. */
3965 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
3968 /* Compute time from now till when time limit is up */
3969 /* Exit if already run out */
3970 if (time_limit
> 0 || microsecs
)
3972 EMACS_GET_TIME (timeout
);
3973 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
3974 if (EMACS_TIME_NEG_P (timeout
))
3978 /* If our caller will not immediately handle keyboard events,
3979 run timer events directly.
3980 (Callers that will immediately read keyboard events
3981 call timer_delay on their own.) */
3982 if (! wait_for_cell
)
3984 EMACS_TIME timer_delay
;
3988 old_timers_run
= timers_run
;
3989 timer_delay
= timer_check (1);
3990 if (timers_run
!= old_timers_run
&& do_display
)
3992 redisplay_preserve_echo_area ();
3993 /* We must retry, since a timer may have requeued itself
3994 and that could alter the time delay. */
3998 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4000 EMACS_TIME difference
;
4001 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4002 if (EMACS_TIME_NEG_P (difference
))
4004 timeout
= timer_delay
;
4005 timeout_reduced_for_timers
= 1;
4010 /* Cause C-g and alarm signals to take immediate action,
4011 and cause input available signals to zero out timeout. */
4012 if (XINT (read_kbd
) < 0)
4013 set_waiting_for_input (&timeout
);
4015 /* Wait till there is something to do. */
4017 if (! XINT (read_kbd
) && wait_for_cell
== 0)
4018 FD_ZERO (&waitchannels
);
4020 FD_SET (0, &waitchannels
);
4022 /* If a frame has been newly mapped and needs updating,
4023 reprocess its display stuff. */
4024 if (frame_garbaged
&& do_display
)
4026 clear_waiting_for_input ();
4027 redisplay_preserve_echo_area ();
4028 if (XINT (read_kbd
) < 0)
4029 set_waiting_for_input (&timeout
);
4032 if (XINT (read_kbd
) && detect_input_pending ())
4035 FD_ZERO (&waitchannels
);
4038 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
4043 /* Make C-g and alarm signals set flags again */
4044 clear_waiting_for_input ();
4046 /* If we woke up due to SIGWINCH, actually change size now. */
4047 do_pending_window_change ();
4049 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4050 /* We waited the full specified time, so return now. */
4055 /* If the system call was interrupted, then go around the
4057 if (xerrno
== EINTR
)
4058 FD_ZERO (&waitchannels
);
4060 error ("select error: %s", strerror (xerrno
));
4063 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
4064 /* System sometimes fails to deliver SIGIO. */
4065 kill (getpid (), SIGIO
);
4068 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
4069 kill (getpid (), SIGIO
);
4072 /* Check for keyboard input */
4074 if ((XINT (read_kbd
) != 0)
4075 && detect_input_pending_run_timers (do_display
))
4077 swallow_events (do_display
);
4078 if (detect_input_pending_run_timers (do_display
))
4082 /* If wait_for_cell. check for keyboard input
4083 but don't run any timers.
4084 ??? (It seems wrong to me to check for keyboard
4085 input at all when wait_for_cell, but the code
4086 has been this way since July 1994.
4087 Try changing this after version 19.31.) */
4089 && detect_input_pending ())
4091 swallow_events (do_display
);
4092 if (detect_input_pending ())
4096 /* Exit now if the cell we're waiting for became non-nil. */
4097 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
4107 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
4108 /* Don't confuse make-docfile by having two doc strings for this function.
4109 make-docfile does not pay attention to #if, for good reason! */
4112 register Lisp_Object name
;
4117 /* Kill all processes associated with `buffer'.
4118 If `buffer' is nil, kill all processes.
4119 Since we have no subprocesses, this does nothing. */
4121 kill_buffer_processes (buffer
)
4132 defsubr (&Sget_buffer_process
);
4136 #endif /* not subprocesses */