1 /* Asynchronous subprocess control for GNU Emacs.
2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 96, 98, 1999
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. */
23 #define _GNU_SOURCE /* to get strsignal declared with glibc 2 */
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 */
47 #if defined(WINDOWSNT) || defined(UNIX98_PTYS)
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 GNU/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" */
104 #include "termhooks.h"
105 #include "termopts.h"
106 #include "commands.h"
107 #include "keyboard.h"
109 #include "blockinput.h"
110 #include "dispextern.h"
111 #include "composite.h"
114 #define max(a, b) ((a) > (b) ? (a) : (b))
116 Lisp_Object Qprocessp
;
117 Lisp_Object Qrun
, Qstop
, Qsignal
, Qopen
, Qclosed
;
118 Lisp_Object Qlast_nonmenu_event
;
119 /* Qexit is declared and initialized in eval.c. */
121 /* a process object is a network connection when its childp field is neither
122 Qt nor Qnil but is instead a cons cell (HOSTNAME PORTNUM). */
125 #define NETCONN_P(p) (GC_CONSP (XPROCESS (p)->childp))
127 #define NETCONN_P(p) 0
128 #endif /* HAVE_SOCKETS */
130 /* Define first descriptor number available for subprocesses. */
132 #define FIRST_PROC_DESC 1
134 #define FIRST_PROC_DESC 3
137 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
140 #if !defined (SIGCHLD) && defined (SIGCLD)
141 #define SIGCHLD SIGCLD
144 #include "syssignal.h"
148 extern void set_waiting_for_input
P_ ((EMACS_TIME
*));
154 extern char *sys_errlist
[];
161 /* t means use pty, nil means use a pipe,
162 maybe other values to come. */
163 static Lisp_Object Vprocess_connection_type
;
167 #include <sys/socket.h>
171 /* These next two vars are non-static since sysdep.c uses them in the
172 emulation of `select'. */
173 /* Number of events of change of status of a process. */
175 /* Number of events for which the user or sentinel has been notified. */
178 #include "sysselect.h"
180 extern int keyboard_bit_set
P_ ((SELECT_TYPE
*));
182 /* If we support a window system, turn on the code to poll periodically
183 to detect C-g. It isn't actually used when doing interrupt input. */
184 #ifdef HAVE_WINDOW_SYSTEM
185 #define POLL_FOR_INPUT
188 /* Mask of bits indicating the descriptors that we wait for input on. */
190 static SELECT_TYPE input_wait_mask
;
192 /* Mask that excludes keyboard input descriptor (s). */
194 static SELECT_TYPE non_keyboard_wait_mask
;
196 /* Mask that excludes process input descriptor (s). */
198 static SELECT_TYPE non_process_wait_mask
;
200 /* The largest descriptor currently in use for a process object. */
201 static int max_process_desc
;
203 /* The largest descriptor currently in use for keyboard input. */
204 static int max_keyboard_desc
;
206 /* Nonzero means delete a process right away if it exits. */
207 static int delete_exited_processes
;
209 /* Indexed by descriptor, gives the process (if any) for that descriptor */
210 Lisp_Object chan_process
[MAXDESC
];
212 /* Alist of elements (NAME . PROCESS) */
213 Lisp_Object Vprocess_alist
;
215 /* Buffered-ahead input char from process, indexed by channel.
216 -1 means empty (no char is buffered).
217 Used on sys V where the only way to tell if there is any
218 output from the process is to read at least one char.
219 Always -1 on systems that support FIONREAD. */
221 /* Don't make static; need to access externally. */
222 int proc_buffered_char
[MAXDESC
];
224 /* Table of `struct coding-system' for each process. */
225 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
226 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
228 static Lisp_Object
get_process ();
230 extern EMACS_TIME
timer_check ();
231 extern int timers_run
;
233 /* Maximum number of bytes to send to a pty without an eof. */
234 static int pty_max_bytes
;
236 extern Lisp_Object Vfile_name_coding_system
, Vdefault_file_name_coding_system
;
239 /* The file name of the pty opened by allocate_pty. */
241 static char pty_name
[24];
244 /* Compute the Lisp form of the process status, p->status, from
245 the numeric status that was returned by `wait'. */
247 Lisp_Object
status_convert ();
251 struct Lisp_Process
*p
;
253 union { int i
; WAITTYPE wt
; } u
;
254 u
.i
= XFASTINT (p
->raw_status_low
) + (XFASTINT (p
->raw_status_high
) << 16);
255 p
->status
= status_convert (u
.wt
);
256 p
->raw_status_low
= Qnil
;
257 p
->raw_status_high
= Qnil
;
260 /* Convert a process status word in Unix format to
261 the list that we use internally. */
268 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
269 else if (WIFEXITED (w
))
270 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
271 WCOREDUMP (w
) ? Qt
: Qnil
));
272 else if (WIFSIGNALED (w
))
273 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
274 WCOREDUMP (w
) ? Qt
: Qnil
));
279 /* Given a status-list, extract the three pieces of information
280 and store them individually through the three pointers. */
283 decode_status (l
, symbol
, code
, coredump
)
301 *code
= XFASTINT (XCAR (tem
));
303 *coredump
= !NILP (tem
);
307 /* Return a string describing a process status list. */
310 status_message (status
)
315 Lisp_Object string
, string2
;
317 decode_status (status
, &symbol
, &code
, &coredump
);
319 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
322 synchronize_system_messages_locale ();
323 signame
= strsignal (code
);
326 string
= build_string (signame
);
327 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
328 XSTRING (string
)->data
[0] = DOWNCASE (XSTRING (string
)->data
[0]);
329 return concat2 (string
, string2
);
331 else if (EQ (symbol
, Qexit
))
334 return build_string ("finished\n");
335 string
= Fnumber_to_string (make_number (code
));
336 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
337 return concat2 (build_string ("exited abnormally with code "),
338 concat2 (string
, string2
));
341 return Fcopy_sequence (Fsymbol_name (symbol
));
346 /* Open an available pty, returning a file descriptor.
347 Return -1 on failure.
348 The file name of the terminal corresponding to the pty
349 is left in the variable pty_name. */
358 /* Some systems name their pseudoterminals so that there are gaps in
359 the usual sequence - for example, on HP9000/S700 systems, there
360 are no pseudoterminals with names ending in 'f'. So we wait for
361 three failures in a row before deciding that we've reached the
363 int failed_count
= 0;
368 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
369 for (i
= 0; i
< 16; i
++)
372 #ifdef PTY_NAME_SPRINTF
375 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
376 #endif /* no PTY_NAME_SPRINTF */
380 #else /* no PTY_OPEN */
382 /* Unusual IRIS code */
383 *ptyv
= emacs_open ("/dev/ptc", O_RDWR
| O_NDELAY
, 0);
386 if (fstat (fd
, &stb
) < 0)
389 if (stat (pty_name
, &stb
) < 0)
392 if (failed_count
>= 3)
398 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
400 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
402 #endif /* not IRIS */
403 #endif /* no PTY_OPEN */
407 /* check to make certain that both sides are available
408 this avoids a nasty yet stupid bug in rlogins */
409 #ifdef PTY_TTY_NAME_SPRINTF
412 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
413 #endif /* no PTY_TTY_NAME_SPRINTF */
415 if (access (pty_name
, 6) != 0)
418 #if !defined(IRIS) && !defined(__sgi)
424 #endif /* not UNIPLUS */
431 #endif /* HAVE_PTYS */
437 struct Lisp_Vector
*vec
;
438 register Lisp_Object val
, tem
, name1
;
439 register struct Lisp_Process
*p
;
443 vec
= allocate_vectorlike ((EMACS_INT
) VECSIZE (struct Lisp_Process
));
444 for (i
= 0; i
< VECSIZE (struct Lisp_Process
); i
++)
445 vec
->contents
[i
] = Qnil
;
446 vec
->size
= VECSIZE (struct Lisp_Process
);
447 p
= (struct Lisp_Process
*)vec
;
449 XSETINT (p
->infd
, -1);
450 XSETINT (p
->outfd
, -1);
451 XSETFASTINT (p
->pid
, 0);
452 XSETFASTINT (p
->tick
, 0);
453 XSETFASTINT (p
->update_tick
, 0);
454 p
->raw_status_low
= Qnil
;
455 p
->raw_status_high
= Qnil
;
457 p
->mark
= Fmake_marker ();
459 /* If name is already in use, modify it until it is unused. */
464 tem
= Fget_process (name1
);
465 if (NILP (tem
)) break;
466 sprintf (suffix
, "<%d>", i
);
467 name1
= concat2 (name
, build_string (suffix
));
471 XSETPROCESS (val
, p
);
472 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
477 remove_process (proc
)
478 register Lisp_Object proc
;
480 register Lisp_Object pair
;
482 pair
= Frassq (proc
, Vprocess_alist
);
483 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
485 deactivate_process (proc
);
488 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
489 "Return t if OBJECT is a process.")
493 return PROCESSP (object
) ? Qt
: Qnil
;
496 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
497 "Return the process named NAME, or nil if there is none.")
499 register Lisp_Object name
;
503 CHECK_STRING (name
, 0);
504 return Fcdr (Fassoc (name
, Vprocess_alist
));
507 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
508 "Return the (or a) process associated with BUFFER.\n\
509 BUFFER may be a buffer or the name of one.")
511 register Lisp_Object buffer
;
513 register Lisp_Object buf
, tail
, proc
;
515 if (NILP (buffer
)) return Qnil
;
516 buf
= Fget_buffer (buffer
);
517 if (NILP (buf
)) return Qnil
;
519 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
521 proc
= Fcdr (Fcar (tail
));
522 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
528 /* This is how commands for the user decode process arguments. It
529 accepts a process, a process name, a buffer, a buffer name, or nil.
530 Buffers denote the first process in the buffer, and nil denotes the
535 register Lisp_Object name
;
537 register Lisp_Object proc
, obj
;
540 obj
= Fget_process (name
);
542 obj
= Fget_buffer (name
);
544 error ("Process %s does not exist", XSTRING (name
)->data
);
546 else if (NILP (name
))
547 obj
= Fcurrent_buffer ();
551 /* Now obj should be either a buffer object or a process object.
555 proc
= Fget_buffer_process (obj
);
557 error ("Buffer %s has no process", XSTRING (XBUFFER (obj
)->name
)->data
);
561 CHECK_PROCESS (obj
, 0);
567 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
568 "Delete PROCESS: kill it and forget about it immediately.\n\
569 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
570 nil, indicating the current buffer's process.")
572 register Lisp_Object process
;
574 process
= get_process (process
);
575 XPROCESS (process
)->raw_status_low
= Qnil
;
576 XPROCESS (process
)->raw_status_high
= Qnil
;
577 if (NETCONN_P (process
))
579 XPROCESS (process
)->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
580 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
582 else if (XINT (XPROCESS (process
)->infd
) >= 0)
584 Fkill_process (process
, Qnil
);
585 /* Do this now, since remove_process will make sigchld_handler do nothing. */
586 XPROCESS (process
)->status
587 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
588 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
591 remove_process (process
);
595 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
596 "Return the status of PROCESS.\n\
597 The returned value is one of the following symbols:\n\
598 run -- for a process that is running.\n\
599 stop -- for a process stopped but continuable.\n\
600 exit -- for a process that has exited.\n\
601 signal -- for a process that has got a fatal signal.\n\
602 open -- for a network stream connection that is open.\n\
603 closed -- for a network stream connection that is closed.\n\
604 nil -- if arg is a process name and no such process exists.\n\
605 PROCESS may be a process, a buffer, the name of a process, or\n\
606 nil, indicating the current buffer's process.")
608 register Lisp_Object process
;
610 register struct Lisp_Process
*p
;
611 register Lisp_Object status
;
613 if (STRINGP (process
))
614 process
= Fget_process (process
);
616 process
= get_process (process
);
621 p
= XPROCESS (process
);
622 if (!NILP (p
->raw_status_low
))
626 status
= XCAR (status
);
627 if (NETCONN_P (process
))
629 if (EQ (status
, Qrun
))
631 else if (EQ (status
, Qexit
))
637 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
639 "Return the exit status of PROCESS or the signal number that killed it.\n\
640 If PROCESS has not yet exited or died, return 0.")
642 register Lisp_Object process
;
644 CHECK_PROCESS (process
, 0);
645 if (!NILP (XPROCESS (process
)->raw_status_low
))
646 update_status (XPROCESS (process
));
647 if (CONSP (XPROCESS (process
)->status
))
648 return XCAR (XCDR (XPROCESS (process
)->status
));
649 return make_number (0);
652 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
653 "Return the process id of PROCESS.\n\
654 This is the pid of the Unix process which PROCESS uses or talks to.\n\
655 For a network connection, this value is nil.")
657 register Lisp_Object process
;
659 CHECK_PROCESS (process
, 0);
660 return XPROCESS (process
)->pid
;
663 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
664 "Return the name of PROCESS, as a string.\n\
665 This is the name of the program invoked in PROCESS,\n\
666 possibly modified to make it unique among process names.")
668 register Lisp_Object process
;
670 CHECK_PROCESS (process
, 0);
671 return XPROCESS (process
)->name
;
674 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
675 "Return the command that was executed to start PROCESS.\n\
676 This is a list of strings, the first string being the program executed\n\
677 and the rest of the strings being the arguments given to it.\n\
678 For a non-child channel, this is nil.")
680 register Lisp_Object process
;
682 CHECK_PROCESS (process
, 0);
683 return XPROCESS (process
)->command
;
686 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
687 "Return the name of the terminal PROCESS uses, or nil if none.\n\
688 This is the terminal that the process itself reads and writes on,\n\
689 not the name of the pty that Emacs uses to talk with that terminal.")
691 register Lisp_Object process
;
693 CHECK_PROCESS (process
, 0);
694 return XPROCESS (process
)->tty_name
;
697 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
699 "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).")
701 register Lisp_Object process
, buffer
;
703 CHECK_PROCESS (process
, 0);
705 CHECK_BUFFER (buffer
, 1);
706 XPROCESS (process
)->buffer
= buffer
;
710 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
712 "Return the buffer PROCESS is associated with.\n\
713 Output from PROCESS is inserted in this buffer unless PROCESS has a filter.")
715 register Lisp_Object process
;
717 CHECK_PROCESS (process
, 0);
718 return XPROCESS (process
)->buffer
;
721 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
723 "Return the marker for the end of the last output from PROCESS.")
725 register Lisp_Object process
;
727 CHECK_PROCESS (process
, 0);
728 return XPROCESS (process
)->mark
;
731 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
733 "Give PROCESS the filter function FILTER; nil means no filter.\n\
734 t means stop accepting output from the process.\n\
735 When a process has a filter, each time it does output\n\
736 the entire string of output is passed to the filter.\n\
737 The filter gets two arguments: the process and the string of output.\n\
738 If the process has a filter, its buffer is not used for output.")
740 register Lisp_Object process
, filter
;
742 CHECK_PROCESS (process
, 0);
745 FD_CLR (XINT (XPROCESS (process
)->infd
), &input_wait_mask
);
746 FD_CLR (XINT (XPROCESS (process
)->infd
), &non_keyboard_wait_mask
);
748 else if (EQ (XPROCESS (process
)->filter
, Qt
))
750 FD_SET (XINT (XPROCESS (process
)->infd
), &input_wait_mask
);
751 FD_SET (XINT (XPROCESS (process
)->infd
), &non_keyboard_wait_mask
);
753 XPROCESS (process
)->filter
= filter
;
757 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
759 "Returns the filter function of PROCESS; nil if none.\n\
760 See `set-process-filter' for more info on filter functions.")
762 register Lisp_Object process
;
764 CHECK_PROCESS (process
, 0);
765 return XPROCESS (process
)->filter
;
768 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
770 "Give PROCESS the sentinel SENTINEL; nil for none.\n\
771 The sentinel is called as a function when the process changes state.\n\
772 It gets two arguments: the process, and a string describing the change.")
774 register Lisp_Object process
, sentinel
;
776 CHECK_PROCESS (process
, 0);
777 XPROCESS (process
)->sentinel
= sentinel
;
781 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
783 "Return the sentinel of PROCESS; nil if none.\n\
784 See `set-process-sentinel' for more info on sentinels.")
786 register Lisp_Object process
;
788 CHECK_PROCESS (process
, 0);
789 return XPROCESS (process
)->sentinel
;
792 DEFUN ("set-process-window-size", Fset_process_window_size
,
793 Sset_process_window_size
, 3, 3, 0,
794 "Tell PROCESS that it has logical window size HEIGHT and WIDTH.")
795 (process
, height
, width
)
796 register Lisp_Object process
, height
, width
;
798 CHECK_PROCESS (process
, 0);
799 CHECK_NATNUM (height
, 0);
800 CHECK_NATNUM (width
, 0);
801 if (set_window_size (XINT (XPROCESS (process
)->infd
),
802 XINT (height
), XINT (width
)) <= 0)
808 DEFUN ("set-process-inherit-coding-system-flag",
809 Fset_process_inherit_coding_system_flag
,
810 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
811 "Determine whether buffer of PROCESS will inherit coding-system.\n\
812 If the second argument FLAG is non-nil, then the variable\n\
813 `buffer-file-coding-system' of the buffer associated with PROCESS\n\
814 will be bound to the value of the coding system used to decode\n\
815 the process output.\n\
817 This is useful when the coding system specified for the process buffer\n\
818 leaves either the character code conversion or the end-of-line conversion\n\
819 unspecified, or if the coding system used to decode the process output\n\
820 is more appropriate for saving the process buffer.\n\
822 Binding the variable `inherit-process-coding-system' to non-nil before\n\
823 starting the process is an alternative way of setting the inherit flag\n\
824 for the process which will run.")
826 register Lisp_Object process
, flag
;
828 CHECK_PROCESS (process
, 0);
829 XPROCESS (process
)->inherit_coding_system_flag
= flag
;
833 DEFUN ("process-inherit-coding-system-flag",
834 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
836 "Return the value of inherit-coding-system flag for PROCESS.\n\
837 If this flag is t, `buffer-file-coding-system' of the buffer\n\
838 associated with PROCESS will inherit the coding system used to decode\n\
839 the process output.")
841 register Lisp_Object process
;
843 CHECK_PROCESS (process
, 0);
844 return XPROCESS (process
)->inherit_coding_system_flag
;
847 DEFUN ("process-kill-without-query", Fprocess_kill_without_query
,
848 Sprocess_kill_without_query
, 1, 2, 0,
849 "Say no query needed if PROCESS is running when Emacs is exited.\n\
850 Optional second argument if non-nil says to require a query.\n\
851 Value is t if a query was formerly required.")
853 register Lisp_Object process
, value
;
857 CHECK_PROCESS (process
, 0);
858 tem
= XPROCESS (process
)->kill_without_query
;
859 XPROCESS (process
)->kill_without_query
= Fnull (value
);
864 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
866 "Return the contact info of PROCESS; t for a real child.\n\
867 For a net connection, the value is a cons cell of the form (HOST SERVICE).")
869 register Lisp_Object process
;
871 CHECK_PROCESS (process
, 0);
872 return XPROCESS (process
)->childp
;
875 #if 0 /* Turned off because we don't currently record this info
876 in the process. Perhaps add it. */
877 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
878 "Return the connection type of PROCESS.\n\
879 The value is nil for a pipe, t or `pty' for a pty, or `stream' for\n\
880 a socket connection.")
884 return XPROCESS (process
)->type
;
891 register Lisp_Object tail
, tem
;
892 Lisp_Object proc
, minspace
, tem1
;
893 register struct Lisp_Process
*p
;
896 XSETFASTINT (minspace
, 1);
898 set_buffer_internal (XBUFFER (Vstandard_output
));
899 Fbuffer_disable_undo (Vstandard_output
);
901 current_buffer
->truncate_lines
= Qt
;
904 Proc Status Buffer Tty Command\n\
905 ---- ------ ------ --- -------\n", -1);
907 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
911 proc
= Fcdr (Fcar (tail
));
913 if (NILP (p
->childp
))
916 Finsert (1, &p
->name
);
917 Findent_to (make_number (13), minspace
);
919 if (!NILP (p
->raw_status_low
))
922 if (CONSP (p
->status
))
923 symbol
= XCAR (p
->status
);
926 if (EQ (symbol
, Qsignal
))
929 tem
= Fcar (Fcdr (p
->status
));
931 if (XINT (tem
) < NSIG
)
932 write_string (sys_errlist
[XINT (tem
)], -1);
935 Fprinc (symbol
, Qnil
);
937 else if (NETCONN_P (proc
))
939 if (EQ (symbol
, Qrun
))
940 write_string ("open", -1);
941 else if (EQ (symbol
, Qexit
))
942 write_string ("closed", -1);
944 Fprinc (symbol
, Qnil
);
947 Fprinc (symbol
, Qnil
);
949 if (EQ (symbol
, Qexit
))
952 tem
= Fcar (Fcdr (p
->status
));
955 sprintf (tembuf
, " %d", (int) XFASTINT (tem
));
956 write_string (tembuf
, -1);
960 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
961 remove_process (proc
);
963 Findent_to (make_number (22), minspace
);
964 if (NILP (p
->buffer
))
965 insert_string ("(none)");
966 else if (NILP (XBUFFER (p
->buffer
)->name
))
967 insert_string ("(Killed)");
969 Finsert (1, &XBUFFER (p
->buffer
)->name
);
971 Findent_to (make_number (37), minspace
);
973 if (STRINGP (p
->tty_name
))
974 Finsert (1, &p
->tty_name
);
976 insert_string ("(none)");
978 Findent_to (make_number (49), minspace
);
980 if (NETCONN_P (proc
))
982 sprintf (tembuf
, "(network stream connection to %s)\n",
983 XSTRING (XCAR (p
->childp
))->data
);
984 insert_string (tembuf
);
998 insert_string ("\n");
1004 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 0, "",
1005 "Display a list of all processes.\n\
1006 Any process listed as exited or signaled is actually eliminated\n\
1007 after the listing is made.")
1010 internal_with_output_to_temp_buffer ("*Process List*",
1011 list_processes_1
, Qnil
);
1015 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1016 "Return a list of all processes.")
1019 return Fmapcar (Qcdr
, Vprocess_alist
);
1022 /* Starting asynchronous inferior processes. */
1024 static Lisp_Object
start_process_unwind ();
1026 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1027 "Start a program in a subprocess. Return the process object for it.\n\
1028 NAME is name for process. It is modified if necessary to make it unique.\n\
1029 BUFFER is the buffer or (buffer-name) to associate with the process.\n\
1030 Process output goes at end of that buffer, unless you specify\n\
1031 an output stream or filter function to handle the output.\n\
1032 BUFFER may be also nil, meaning that this process is not associated\n\
1034 Third arg is program file name. It is searched for in PATH.\n\
1035 Remaining arguments are strings to give program as arguments.")
1038 register Lisp_Object
*args
;
1040 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1042 register unsigned char *new_argv
;
1045 register unsigned char **new_argv
;
1048 int count
= specpdl_ptr
- specpdl
;
1052 buffer
= Fget_buffer_create (buffer
);
1054 /* Make sure that the child will be able to chdir to the current
1055 buffer's current directory, or its unhandled equivalent. We
1056 can't just have the child check for an error when it does the
1057 chdir, since it's in a vfork.
1059 We have to GCPRO around this because Fexpand_file_name and
1060 Funhandled_file_name_directory might call a file name handling
1061 function. The argument list is protected by the caller, so all
1062 we really have to worry about is buffer. */
1064 struct gcpro gcpro1
, gcpro2
;
1066 current_dir
= current_buffer
->directory
;
1068 GCPRO2 (buffer
, current_dir
);
1071 = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir
),
1073 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1074 report_file_error ("Setting current directory",
1075 Fcons (current_buffer
->directory
, Qnil
));
1081 CHECK_STRING (name
, 0);
1085 CHECK_STRING (program
, 2);
1087 proc
= make_process (name
);
1088 /* If an error occurs and we can't start the process, we want to
1089 remove it from the process list. This means that each error
1090 check in create_process doesn't need to call remove_process
1091 itself; it's all taken care of here. */
1092 record_unwind_protect (start_process_unwind
, proc
);
1094 XPROCESS (proc
)->childp
= Qt
;
1095 XPROCESS (proc
)->command_channel_p
= Qnil
;
1096 XPROCESS (proc
)->buffer
= buffer
;
1097 XPROCESS (proc
)->sentinel
= Qnil
;
1098 XPROCESS (proc
)->filter
= Qnil
;
1099 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1101 /* Make the process marker point into the process buffer (if any). */
1103 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1104 BUF_ZV (XBUFFER (buffer
)),
1105 BUF_ZV_BYTE (XBUFFER (buffer
)));
1108 /* Decide coding systems for communicating with the process. Here
1109 we don't setup the structure coding_system nor pay attention to
1110 unibyte mode. They are done in create_process. */
1112 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1113 Lisp_Object coding_systems
= Qt
;
1114 Lisp_Object val
, *args2
;
1115 struct gcpro gcpro1
, gcpro2
;
1117 val
= Vcoding_system_for_read
;
1120 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1121 args2
[0] = Qstart_process
;
1122 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1123 GCPRO2 (proc
, current_dir
);
1124 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1126 if (CONSP (coding_systems
))
1127 val
= XCAR (coding_systems
);
1128 else if (CONSP (Vdefault_process_coding_system
))
1129 val
= XCAR (Vdefault_process_coding_system
);
1131 XPROCESS (proc
)->decode_coding_system
= val
;
1133 val
= Vcoding_system_for_write
;
1136 if (EQ (coding_systems
, Qt
))
1138 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof args2
);
1139 args2
[0] = Qstart_process
;
1140 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1141 GCPRO2 (proc
, current_dir
);
1142 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1145 if (CONSP (coding_systems
))
1146 val
= XCDR (coding_systems
);
1147 else if (CONSP (Vdefault_process_coding_system
))
1148 val
= XCDR (Vdefault_process_coding_system
);
1150 XPROCESS (proc
)->encode_coding_system
= val
;
1154 /* Make a one member argv with all args concatenated
1155 together separated by a blank. */
1156 len
= STRING_BYTES (XSTRING (program
)) + 2;
1157 for (i
= 3; i
< nargs
; i
++)
1160 CHECK_STRING (tem
, i
);
1161 len
+= STRING_BYTES (XSTRING (tem
)) + 1; /* count the blank */
1163 new_argv
= (unsigned char *) alloca (len
);
1164 strcpy (new_argv
, XSTRING (program
)->data
);
1165 for (i
= 3; i
< nargs
; i
++)
1168 CHECK_STRING (tem
, i
);
1169 strcat (new_argv
, " ");
1170 strcat (new_argv
, XSTRING (tem
)->data
);
1172 /* Need to add code here to check for program existence on VMS */
1175 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1177 /* If program file name is not absolute, search our path for it */
1178 if (!IS_DIRECTORY_SEP (XSTRING (program
)->data
[0])
1179 && !(XSTRING (program
)->size
> 1
1180 && IS_DEVICE_SEP (XSTRING (program
)->data
[1])))
1182 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1185 GCPRO4 (name
, program
, buffer
, current_dir
);
1186 openp (Vexec_path
, program
, EXEC_SUFFIXES
, &tem
, 1);
1189 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1190 tem
= Fexpand_file_name (tem
, Qnil
);
1191 tem
= ENCODE_FILE (tem
);
1192 new_argv
[0] = XSTRING (tem
)->data
;
1196 if (!NILP (Ffile_directory_p (program
)))
1197 error ("Specified program for new process is a directory");
1199 tem
= ENCODE_FILE (program
);
1200 new_argv
[0] = XSTRING (tem
)->data
;
1203 /* Here we encode arguments by the coding system used for sending
1204 data to the process. We don't support using different coding
1205 systems for encoding arguments and for encoding data sent to the
1208 for (i
= 3; i
< nargs
; i
++)
1211 CHECK_STRING (tem
, i
);
1212 if (STRING_MULTIBYTE (tem
))
1213 tem
= (code_convert_string_norecord
1214 (tem
, XPROCESS (proc
)->encode_coding_system
, 1));
1215 new_argv
[i
- 2] = XSTRING (tem
)->data
;
1217 new_argv
[i
- 2] = 0;
1218 #endif /* not VMS */
1220 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
1221 XPROCESS (proc
)->decoding_carryover
= make_number (0);
1222 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
1223 XPROCESS (proc
)->encoding_carryover
= make_number (0);
1225 XPROCESS (proc
)->inherit_coding_system_flag
1226 = (NILP (buffer
) || !inherit_process_coding_system
1229 create_process (proc
, (char **) new_argv
, current_dir
);
1231 return unbind_to (count
, proc
);
1234 /* This function is the unwind_protect form for Fstart_process. If
1235 PROC doesn't have its pid set, then we know someone has signaled
1236 an error and the process wasn't started successfully, so we should
1237 remove it from the process list. */
1239 start_process_unwind (proc
)
1242 if (!PROCESSP (proc
))
1245 /* Was PROC started successfully? */
1246 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1247 remove_process (proc
);
1253 create_process_1 (timer
)
1254 struct atimer
*timer
;
1256 /* Nothing to do. */
1260 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1263 /* Mimic blocking of signals on system V, which doesn't really have it. */
1265 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1266 int sigchld_deferred
;
1269 create_process_sigchld ()
1271 signal (SIGCHLD
, create_process_sigchld
);
1273 sigchld_deferred
= 1;
1279 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1281 create_process (process
, new_argv
, current_dir
)
1282 Lisp_Object process
;
1284 Lisp_Object current_dir
;
1286 int pid
, inchannel
, outchannel
;
1288 #ifdef POSIX_SIGNALS
1291 struct sigaction sigint_action
;
1292 struct sigaction sigquit_action
;
1294 struct sigaction sighup_action
;
1296 #else /* !POSIX_SIGNALS */
1299 SIGTYPE (*sigchld
)();
1302 #endif /* !POSIX_SIGNALS */
1303 /* Use volatile to protect variables from being clobbered by longjmp. */
1304 volatile int forkin
, forkout
;
1305 volatile int pty_flag
= 0;
1307 extern char **environ
;
1309 Lisp_Object buffer
= XPROCESS (process
)->buffer
;
1311 inchannel
= outchannel
= -1;
1314 if (!NILP (Vprocess_connection_type
))
1315 outchannel
= inchannel
= allocate_pty ();
1320 /* On USG systems it does not work to open the pty's tty here
1321 and then close and reopen it in the child. */
1323 /* Don't let this terminal become our controlling terminal
1324 (in case we don't have one). */
1325 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1327 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1330 report_file_error ("Opening pty", Qnil
);
1332 forkin
= forkout
= -1;
1333 #endif /* not USG */
1337 #endif /* HAVE_PTYS */
1340 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1341 report_file_error ("Opening socketpair", Qnil
);
1342 outchannel
= inchannel
= sv
[0];
1343 forkout
= forkin
= sv
[1];
1345 #else /* not SKTPAIR */
1350 report_file_error ("Creating pipe", Qnil
);
1356 emacs_close (inchannel
);
1357 emacs_close (forkout
);
1358 report_file_error ("Creating pipe", Qnil
);
1363 #endif /* not SKTPAIR */
1366 /* Replaced by close_process_descs */
1367 set_exclusive_use (inchannel
);
1368 set_exclusive_use (outchannel
);
1371 /* Stride people say it's a mystery why this is needed
1372 as well as the O_NDELAY, but that it fails without this. */
1373 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1376 ioctl (inchannel
, FIONBIO
, &one
);
1381 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1382 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1385 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1386 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1390 /* Record this as an active process, with its channels.
1391 As a result, child_setup will close Emacs's side of the pipes. */
1392 chan_process
[inchannel
] = process
;
1393 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1394 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1395 /* Record the tty descriptor used in the subprocess. */
1397 XPROCESS (process
)->subtty
= Qnil
;
1399 XSETFASTINT (XPROCESS (process
)->subtty
, forkin
);
1400 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1401 XPROCESS (process
)->status
= Qrun
;
1402 if (!proc_decode_coding_system
[inchannel
])
1403 proc_decode_coding_system
[inchannel
]
1404 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
1405 setup_coding_system (XPROCESS (process
)->decode_coding_system
,
1406 proc_decode_coding_system
[inchannel
]);
1407 if (!proc_encode_coding_system
[outchannel
])
1408 proc_encode_coding_system
[outchannel
]
1409 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
1410 setup_coding_system (XPROCESS (process
)->encode_coding_system
,
1411 proc_encode_coding_system
[outchannel
]);
1413 /* Delay interrupts until we have a chance to store
1414 the new fork's pid in its process structure */
1415 #ifdef POSIX_SIGNALS
1416 sigemptyset (&blocked
);
1418 sigaddset (&blocked
, SIGCHLD
);
1421 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1422 this sets the parent's signal handlers as well as the child's.
1423 So delay all interrupts whose handlers the child might munge,
1424 and record the current handlers so they can be restored later. */
1425 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1426 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1428 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1430 #endif /* HAVE_VFORK */
1431 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1432 #else /* !POSIX_SIGNALS */
1436 #else /* not BSD4_1 */
1437 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1438 sigsetmask (sigmask (SIGCHLD
));
1439 #else /* ordinary USG */
1441 sigchld_deferred
= 0;
1442 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1444 #endif /* ordinary USG */
1445 #endif /* not BSD4_1 */
1446 #endif /* SIGCHLD */
1447 #endif /* !POSIX_SIGNALS */
1449 FD_SET (inchannel
, &input_wait_mask
);
1450 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1451 if (inchannel
> max_process_desc
)
1452 max_process_desc
= inchannel
;
1454 /* Until we store the proper pid, enable sigchld_handler
1455 to recognize an unknown pid as standing for this process.
1456 It is very important not to let this `marker' value stay
1457 in the table after this function has returned; if it does
1458 it might cause call-process to hang and subsequent asynchronous
1459 processes to get their return values scrambled. */
1460 XSETINT (XPROCESS (process
)->pid
, -1);
1465 /* child_setup must clobber environ on systems with true vfork.
1466 Protect it from permanent change. */
1467 char **save_environ
= environ
;
1469 current_dir
= ENCODE_FILE (current_dir
);
1474 #endif /* not WINDOWSNT */
1476 int xforkin
= forkin
;
1477 int xforkout
= forkout
;
1479 #if 0 /* This was probably a mistake--it duplicates code later on,
1480 but fails to handle all the cases. */
1481 /* Make sure SIGCHLD is not blocked in the child. */
1482 sigsetmask (SIGEMPTYMASK
);
1485 /* Make the pty be the controlling terminal of the process. */
1487 /* First, disconnect its current controlling terminal. */
1489 /* We tried doing setsid only if pty_flag, but it caused
1490 process_set_signal to fail on SGI when using a pipe. */
1492 /* Make the pty's terminal the controlling terminal. */
1496 /* We ignore the return value
1497 because faith@cs.unc.edu says that is necessary on Linux. */
1498 ioctl (xforkin
, TIOCSCTTY
, 0);
1501 #else /* not HAVE_SETSID */
1503 /* It's very important to call setpgrp here and no time
1504 afterwards. Otherwise, we lose our controlling tty which
1505 is set when we open the pty. */
1508 #endif /* not HAVE_SETSID */
1509 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1510 if (pty_flag
&& xforkin
>= 0)
1513 tcgetattr (xforkin
, &t
);
1515 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1516 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1519 #if defined (NTTYDISC) && defined (TIOCSETD)
1520 if (pty_flag
&& xforkin
>= 0)
1522 /* Use new line discipline. */
1523 int ldisc
= NTTYDISC
;
1524 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1529 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1530 can do TIOCSPGRP only to the process's controlling tty. */
1533 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1534 I can't test it since I don't have 4.3. */
1535 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1536 ioctl (j
, TIOCNOTTY
, 0);
1539 /* In order to get a controlling terminal on some versions
1540 of BSD, it is necessary to put the process in pgrp 0
1541 before it opens the terminal. */
1549 #endif /* TIOCNOTTY */
1551 #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY)
1552 /*** There is a suggestion that this ought to be a
1553 conditional on TIOCSPGRP,
1554 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1555 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1556 that system does seem to need this code, even though
1557 both HAVE_SETSID and TIOCSCTTY are defined. */
1558 /* Now close the pty (if we had it open) and reopen it.
1559 This makes the pty the controlling terminal of the subprocess. */
1562 #ifdef SET_CHILD_PTY_PGRP
1563 int pgrp
= getpid ();
1566 /* I wonder if emacs_close (emacs_open (pty_name, ...))
1569 emacs_close (xforkin
);
1570 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
1574 emacs_write (1, "Couldn't open the pty terminal ", 31);
1575 emacs_write (1, pty_name
, strlen (pty_name
));
1576 emacs_write (1, "\n", 1);
1580 #ifdef SET_CHILD_PTY_PGRP
1581 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1582 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1585 #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */
1587 #ifdef SETUP_SLAVE_PTY
1592 #endif /* SETUP_SLAVE_PTY */
1594 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1595 Now reenable it in the child, so it will die when we want it to. */
1597 signal (SIGHUP
, SIG_DFL
);
1599 #endif /* HAVE_PTYS */
1601 signal (SIGINT
, SIG_DFL
);
1602 signal (SIGQUIT
, SIG_DFL
);
1604 /* Stop blocking signals in the child. */
1605 #ifdef POSIX_SIGNALS
1606 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1607 #else /* !POSIX_SIGNALS */
1611 #else /* not BSD4_1 */
1612 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1613 sigsetmask (SIGEMPTYMASK
);
1614 #else /* ordinary USG */
1616 signal (SIGCHLD
, sigchld
);
1618 #endif /* ordinary USG */
1619 #endif /* not BSD4_1 */
1620 #endif /* SIGCHLD */
1621 #endif /* !POSIX_SIGNALS */
1624 child_setup_tty (xforkout
);
1626 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1627 new_argv
, 1, current_dir
);
1628 #else /* not WINDOWSNT */
1629 child_setup (xforkin
, xforkout
, xforkout
,
1630 new_argv
, 1, current_dir
);
1631 #endif /* not WINDOWSNT */
1633 environ
= save_environ
;
1638 /* This runs in the Emacs process. */
1642 emacs_close (forkin
);
1643 if (forkin
!= forkout
&& forkout
>= 0)
1644 emacs_close (forkout
);
1648 /* vfork succeeded. */
1649 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
1652 register_child (pid
, inchannel
);
1653 #endif /* WINDOWSNT */
1655 /* If the subfork execv fails, and it exits,
1656 this close hangs. I don't know why.
1657 So have an interrupt jar it loose. */
1659 struct atimer
*timer
;
1663 EMACS_SET_SECS_USECS (offset
, 1, 0);
1664 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
1666 XPROCESS (process
)->subtty
= Qnil
;
1668 emacs_close (forkin
);
1670 cancel_atimer (timer
);
1674 if (forkin
!= forkout
&& forkout
>= 0)
1675 emacs_close (forkout
);
1679 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1682 XPROCESS (process
)->tty_name
= Qnil
;
1685 /* Restore the signal state whether vfork succeeded or not.
1686 (We will signal an error, below, if it failed.) */
1687 #ifdef POSIX_SIGNALS
1689 /* Restore the parent's signal handlers. */
1690 sigaction (SIGINT
, &sigint_action
, 0);
1691 sigaction (SIGQUIT
, &sigquit_action
, 0);
1693 sigaction (SIGHUP
, &sighup_action
, 0);
1695 #endif /* HAVE_VFORK */
1696 /* Stop blocking signals in the parent. */
1697 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1698 #else /* !POSIX_SIGNALS */
1702 #else /* not BSD4_1 */
1703 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1704 sigsetmask (SIGEMPTYMASK
);
1705 #else /* ordinary USG */
1707 signal (SIGCHLD
, sigchld
);
1708 /* Now really handle any of these signals
1709 that came in during this function. */
1710 if (sigchld_deferred
)
1711 kill (getpid (), SIGCHLD
);
1713 #endif /* ordinary USG */
1714 #endif /* not BSD4_1 */
1715 #endif /* SIGCHLD */
1716 #endif /* !POSIX_SIGNALS */
1718 /* Now generate the error if vfork failed. */
1720 report_file_error ("Doing vfork", Qnil
);
1722 #endif /* not VMS */
1726 /* open a TCP network connection to a given HOST/SERVICE. Treated
1727 exactly like a normal process when reading and writing. Only
1728 differences are in status display and process deletion. A network
1729 connection has no PID; you cannot signal it. All you can do is
1730 deactivate and close it via delete-process */
1732 DEFUN ("open-network-stream", Fopen_network_stream
, Sopen_network_stream
,
1734 "Open a TCP connection for a service to a host.\n\
1735 Returns a subprocess-object to represent the connection.\n\
1736 Input and output work as for subprocesses; `delete-process' closes it.\n\
1737 Args are NAME BUFFER HOST SERVICE.\n\
1738 NAME is name for process. It is modified if necessary to make it unique.\n\
1739 BUFFER is the buffer (or buffer-name) to associate with the process.\n\
1740 Process output goes at end of that buffer, unless you specify\n\
1741 an output stream or filter function to handle the output.\n\
1742 BUFFER may be also nil, meaning that this process is not associated\n\
1744 Third arg is name of the host to connect to, or its IP address.\n\
1745 Fourth arg SERVICE is name of the service desired, or an integer\n\
1746 specifying a port number to connect to.")
1747 (name
, buffer
, host
, service
)
1748 Lisp_Object name
, buffer
, host
, service
;
1751 #ifdef HAVE_GETADDRINFO
1752 struct addrinfo hints
, *res
, *lres
;
1755 char *portstring
, portbuf
[128];
1756 #else /* HAVE_GETADDRINFO */
1757 struct sockaddr_in address
;
1758 struct servent
*svc_info
;
1759 struct hostent
*host_info_ptr
, host_info
;
1760 char *(addr_list
[2]);
1761 IN_ADDR numeric_addr
;
1763 #endif /* HAVE_GETADDRINFO */
1764 int s
= -1, outch
, inch
;
1765 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1767 int count
= specpdl_ptr
- specpdl
;
1771 /* Ensure socket support is loaded if available. */
1772 init_winsock (TRUE
);
1775 GCPRO4 (name
, buffer
, host
, service
);
1776 CHECK_STRING (name
, 0);
1777 CHECK_STRING (host
, 0);
1779 #ifdef HAVE_GETADDRINFO
1780 /* SERVICE can either be a string or int.
1781 Convert to a C string for later use by getaddrinfo. */
1782 if (INTEGERP (service
))
1784 sprintf (portbuf
, "%ld", (long) XINT (service
));
1785 portstring
= portbuf
;
1789 CHECK_STRING (service
, 0);
1790 portstring
= XSTRING (service
)->data
;
1792 #else /* HAVE_GETADDRINFO */
1793 if (INTEGERP (service
))
1794 port
= htons ((unsigned short) XINT (service
));
1797 CHECK_STRING (service
, 0);
1798 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
1800 error ("Unknown service \"%s\"", XSTRING (service
)->data
);
1801 port
= svc_info
->s_port
;
1803 #endif /* HAVE_GETADDRINFO */
1806 /* Slow down polling to every ten seconds.
1807 Some kernels have a bug which causes retrying connect to fail
1808 after a connect. Polling can interfere with gethostbyname too. */
1809 #ifdef POLL_FOR_INPUT
1810 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
1811 bind_polling_period (10);
1815 #ifdef HAVE_GETADDRINFO
1818 memset (&hints
, 0, sizeof (hints
));
1820 hints
.ai_family
= AF_UNSPEC
;
1821 hints
.ai_socktype
= SOCK_STREAM
;
1822 hints
.ai_protocol
= 0;
1823 ret
= getaddrinfo (XSTRING (host
)->data
, portstring
, &hints
, &res
);
1825 #ifdef HAVE_GAI_STRERROR
1826 error ("%s/%s %s", XSTRING (host
)->data
, portstring
, gai_strerror(ret
));
1828 error ("%s/%s getaddrinfo error %d", XSTRING (host
)->data
, portstring
,
1833 /* Do this in case we never enter the for-loop below. */
1834 count1
= specpdl_ptr
- specpdl
;
1837 for (lres
= res
; lres
; lres
= lres
->ai_next
)
1839 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
1846 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
1847 when connect is interrupted. So let's not let it get interrupted.
1848 Note we do not turn off polling, because polling is only used
1849 when not interrupt_input, and thus not normally used on the systems
1850 which have this bug. On systems which use polling, there's no way
1851 to quit if polling is turned off. */
1852 if (interrupt_input
)
1855 /* Make us close S if quit. */
1856 count1
= specpdl_ptr
- specpdl
;
1857 record_unwind_protect (close_file_unwind
, make_number (s
));
1864 /* This turns off all alarm-based interrupts; the
1865 bind_polling_period call above doesn't always turn all the
1866 short-interval ones off, especially if interrupt_input is
1869 It'd be nice to be able to control the connect timeout
1870 though. Would non-blocking connect calls be portable? */
1871 turn_on_atimers (0);
1872 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
1874 turn_on_atimers (1);
1876 if (ret
== 0 || xerrno
== EISCONN
)
1877 /* The unwind-protect will be discarded afterwards.
1878 Likewise for immediate_quit. */
1883 if (xerrno
== EINTR
)
1885 if (xerrno
== EADDRINUSE
&& retry
< 20)
1887 /* A delay here is needed on some FreeBSD systems,
1888 and it is harmless, since this retrying takes time anyway
1889 and should be infrequent. */
1890 Fsleep_for (make_number (1), Qnil
);
1895 /* Discard the unwind protect closing S. */
1896 specpdl_ptr
= specpdl
+ count1
;
1897 count1
= specpdl_ptr
- specpdl
;
1906 if (interrupt_input
)
1910 report_file_error ("connection failed",
1911 Fcons (host
, Fcons (name
, Qnil
)));
1914 #else /* not HAVE_GETADDRINFO */
1925 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
1929 if (! (host_info_ptr
== 0 && h_errno
== TRY_AGAIN
))
1933 Fsleep_for (make_number (1), Qnil
);
1936 if (host_info_ptr
== 0)
1937 /* Attempt to interpret host as numeric inet address */
1939 numeric_addr
= inet_addr ((char *) XSTRING (host
)->data
);
1940 if (NUMERIC_ADDR_ERROR
)
1941 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
1943 host_info_ptr
= &host_info
;
1944 host_info
.h_name
= 0;
1945 host_info
.h_aliases
= 0;
1946 host_info
.h_addrtype
= AF_INET
;
1948 /* Older machines have only one address slot called h_addr.
1949 Newer machines have h_addr_list, but #define h_addr to
1950 be its first element. */
1951 host_info
.h_addr_list
= &(addr_list
[0]);
1953 host_info
.h_addr
= (char*)(&numeric_addr
);
1955 /* numeric_addr isn't null-terminated; it has fixed length. */
1956 host_info
.h_length
= sizeof (numeric_addr
);
1959 bzero (&address
, sizeof address
);
1960 bcopy (host_info_ptr
->h_addr
, (char *) &address
.sin_addr
,
1961 host_info_ptr
->h_length
);
1962 address
.sin_family
= host_info_ptr
->h_addrtype
;
1963 address
.sin_port
= port
;
1965 s
= socket (host_info_ptr
->h_addrtype
, SOCK_STREAM
, 0);
1967 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1969 count1
= specpdl_ptr
- specpdl
;
1970 record_unwind_protect (close_file_unwind
, make_number (s
));
1972 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
1973 when connect is interrupted. So let's not let it get interrupted.
1974 Note we do not turn off polling, because polling is only used
1975 when not interrupt_input, and thus not normally used on the systems
1976 which have this bug. On systems which use polling, there's no way
1977 to quit if polling is turned off. */
1978 if (interrupt_input
)
1986 if (connect (s
, (struct sockaddr
*) &address
, sizeof address
) == -1
1987 && errno
!= EISCONN
)
1995 if (errno
== EADDRINUSE
&& retry
< 20)
1997 /* A delay here is needed on some FreeBSD systems,
1998 and it is harmless, since this retrying takes time anyway
1999 and should be infrequent. */
2000 Fsleep_for (make_number (1), Qnil
);
2005 /* Discard the unwind protect. */
2006 specpdl_ptr
= specpdl
+ count1
;
2010 if (interrupt_input
)
2014 report_file_error ("connection failed",
2015 Fcons (host
, Fcons (name
, Qnil
)));
2018 #endif /* not HAVE_GETADDRINFO */
2022 /* Discard the unwind protect, if any. */
2023 specpdl_ptr
= specpdl
+ count1
;
2025 #ifdef POLL_FOR_INPUT
2026 unbind_to (count
, Qnil
);
2029 if (interrupt_input
)
2033 s
= connect_server (0);
2035 report_file_error ("error creating socket", Fcons (name
, Qnil
));
2036 send_command (s
, C_PORT
, 0, "%s:%d", XSTRING (host
)->data
, ntohs (port
));
2037 send_command (s
, C_DUMB
, 1, 0);
2044 buffer
= Fget_buffer_create (buffer
);
2045 proc
= make_process (name
);
2047 chan_process
[inch
] = proc
;
2050 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
2053 fcntl (inch
, F_SETFL
, O_NDELAY
);
2057 XPROCESS (proc
)->childp
= Fcons (host
, Fcons (service
, Qnil
));
2058 XPROCESS (proc
)->command_channel_p
= Qnil
;
2059 XPROCESS (proc
)->buffer
= buffer
;
2060 XPROCESS (proc
)->sentinel
= Qnil
;
2061 XPROCESS (proc
)->filter
= Qnil
;
2062 XPROCESS (proc
)->command
= Qnil
;
2063 XPROCESS (proc
)->pid
= Qnil
;
2064 XSETINT (XPROCESS (proc
)->infd
, inch
);
2065 XSETINT (XPROCESS (proc
)->outfd
, outch
);
2066 XPROCESS (proc
)->status
= Qrun
;
2067 FD_SET (inch
, &input_wait_mask
);
2068 FD_SET (inch
, &non_keyboard_wait_mask
);
2069 if (inch
> max_process_desc
)
2070 max_process_desc
= inch
;
2073 /* Setup coding systems for communicating with the network stream. */
2074 struct gcpro gcpro1
;
2075 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
2076 Lisp_Object coding_systems
= Qt
;
2077 Lisp_Object args
[5], val
;
2079 if (!NILP (Vcoding_system_for_read
))
2080 val
= Vcoding_system_for_read
;
2081 else if ((!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
))
2082 || (NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
)))
2083 /* We dare not decode end-of-line format by setting VAL to
2084 Qraw_text, because the existing Emacs Lisp libraries
2085 assume that they receive bare code including a sequene of
2090 args
[0] = Qopen_network_stream
, args
[1] = name
,
2091 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
2093 coding_systems
= Ffind_operation_coding_system (5, args
);
2095 if (CONSP (coding_systems
))
2096 val
= XCAR (coding_systems
);
2097 else if (CONSP (Vdefault_process_coding_system
))
2098 val
= XCAR (Vdefault_process_coding_system
);
2102 XPROCESS (proc
)->decode_coding_system
= val
;
2104 if (!NILP (Vcoding_system_for_write
))
2105 val
= Vcoding_system_for_write
;
2106 else if (NILP (current_buffer
->enable_multibyte_characters
))
2110 if (EQ (coding_systems
, Qt
))
2112 args
[0] = Qopen_network_stream
, args
[1] = name
,
2113 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
2115 coding_systems
= Ffind_operation_coding_system (5, args
);
2118 if (CONSP (coding_systems
))
2119 val
= XCDR (coding_systems
);
2120 else if (CONSP (Vdefault_process_coding_system
))
2121 val
= XCDR (Vdefault_process_coding_system
);
2125 XPROCESS (proc
)->encode_coding_system
= val
;
2128 if (!proc_decode_coding_system
[inch
])
2129 proc_decode_coding_system
[inch
]
2130 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
2131 setup_coding_system (XPROCESS (proc
)->decode_coding_system
,
2132 proc_decode_coding_system
[inch
]);
2133 if (!proc_encode_coding_system
[outch
])
2134 proc_encode_coding_system
[outch
]
2135 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
2136 setup_coding_system (XPROCESS (proc
)->encode_coding_system
,
2137 proc_encode_coding_system
[outch
]);
2139 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
2140 XPROCESS (proc
)->decoding_carryover
= make_number (0);
2141 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
2142 XPROCESS (proc
)->encoding_carryover
= make_number (0);
2144 XPROCESS (proc
)->inherit_coding_system_flag
2145 = (NILP (buffer
) || !inherit_process_coding_system
2151 #endif /* HAVE_SOCKETS */
2154 deactivate_process (proc
)
2157 register int inchannel
, outchannel
;
2158 register struct Lisp_Process
*p
= XPROCESS (proc
);
2160 inchannel
= XINT (p
->infd
);
2161 outchannel
= XINT (p
->outfd
);
2165 /* Beware SIGCHLD hereabouts. */
2166 flush_pending_output (inchannel
);
2169 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
2170 sys$
dassgn (outchannel
);
2171 vs
= get_vms_process_pointer (p
->pid
);
2173 give_back_vms_process_stuff (vs
);
2176 emacs_close (inchannel
);
2177 if (outchannel
>= 0 && outchannel
!= inchannel
)
2178 emacs_close (outchannel
);
2181 XSETINT (p
->infd
, -1);
2182 XSETINT (p
->outfd
, -1);
2183 chan_process
[inchannel
] = Qnil
;
2184 FD_CLR (inchannel
, &input_wait_mask
);
2185 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
2186 if (inchannel
== max_process_desc
)
2189 /* We just closed the highest-numbered process input descriptor,
2190 so recompute the highest-numbered one now. */
2191 max_process_desc
= 0;
2192 for (i
= 0; i
< MAXDESC
; i
++)
2193 if (!NILP (chan_process
[i
]))
2194 max_process_desc
= i
;
2199 /* Close all descriptors currently in use for communication
2200 with subprocess. This is used in a newly-forked subprocess
2201 to get rid of irrelevant descriptors. */
2204 close_process_descs ()
2208 for (i
= 0; i
< MAXDESC
; i
++)
2210 Lisp_Object process
;
2211 process
= chan_process
[i
];
2212 if (!NILP (process
))
2214 int in
= XINT (XPROCESS (process
)->infd
);
2215 int out
= XINT (XPROCESS (process
)->outfd
);
2218 if (out
>= 0 && in
!= out
)
2225 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
2227 "Allow any pending output from subprocesses to be read by Emacs.\n\
2228 It is read into the process' buffers or given to their filter functions.\n\
2229 Non-nil arg PROCESS means do not return until some output has been received\n\
2231 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
2232 seconds and microseconds to wait; return after that much time whether\n\
2233 or not there is input.\n\
2234 Return non-nil iff we received any output before the timeout expired.")
2235 (process
, timeout
, timeout_msecs
)
2236 register Lisp_Object process
, timeout
, timeout_msecs
;
2241 if (! NILP (process
))
2242 CHECK_PROCESS (process
, 0);
2244 if (! NILP (timeout_msecs
))
2246 CHECK_NUMBER (timeout_msecs
, 2);
2247 useconds
= XINT (timeout_msecs
);
2248 if (!INTEGERP (timeout
))
2249 XSETINT (timeout
, 0);
2252 int carry
= useconds
/ 1000000;
2254 XSETINT (timeout
, XINT (timeout
) + carry
);
2255 useconds
-= carry
* 1000000;
2257 /* I think this clause is necessary because C doesn't
2258 guarantee a particular rounding direction for negative
2262 XSETINT (timeout
, XINT (timeout
) - 1);
2263 useconds
+= 1000000;
2270 if (! NILP (timeout
))
2272 CHECK_NUMBER (timeout
, 1);
2273 seconds
= XINT (timeout
);
2274 if (seconds
< 0 || (seconds
== 0 && useconds
== 0))
2286 XSETFASTINT (process
, 0);
2289 (wait_reading_process_input (seconds
, useconds
, process
, 0)
2293 /* This variable is different from waiting_for_input in keyboard.c.
2294 It is used to communicate to a lisp process-filter/sentinel (via the
2295 function Fwaiting_for_user_input_p below) whether emacs was waiting
2296 for user-input when that process-filter was called.
2297 waiting_for_input cannot be used as that is by definition 0 when
2298 lisp code is being evalled.
2299 This is also used in record_asynch_buffer_change.
2300 For that purpose, this must be 0
2301 when not inside wait_reading_process_input. */
2302 static int waiting_for_user_input_p
;
2304 /* This is here so breakpoints can be put on it. */
2306 wait_reading_process_input_1 ()
2310 /* Read and dispose of subprocess output while waiting for timeout to
2311 elapse and/or keyboard input to be available.
2314 timeout in seconds, or
2315 zero for no limit, or
2316 -1 means gobble data immediately available but don't wait for any.
2319 an additional duration to wait, measured in microseconds.
2320 If this is nonzero and time_limit is 0, then the timeout
2321 consists of MICROSECS only.
2323 READ_KBD is a lisp value:
2324 0 to ignore keyboard input, or
2325 1 to return when input is available, or
2326 -1 meaning caller will actually read the input, so don't throw to
2327 the quit handler, or
2328 a cons cell, meaning wait until its car is non-nil
2329 (and gobble terminal input into the buffer if any arrives), or
2330 a process object, meaning wait until something arrives from that
2331 process. The return value is true iff we read some input from
2334 DO_DISPLAY != 0 means redisplay should be done to show subprocess
2335 output that arrives.
2337 If READ_KBD is a pointer to a struct Lisp_Process, then the
2338 function returns true iff we received input from that process
2339 before the timeout elapsed.
2340 Otherwise, return true iff we received input from any process. */
2343 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
2344 int time_limit
, microsecs
;
2345 Lisp_Object read_kbd
;
2348 register int channel
, nfds
;
2349 static SELECT_TYPE Available
;
2352 EMACS_TIME timeout
, end_time
;
2354 int wait_channel
= -1;
2355 struct Lisp_Process
*wait_proc
= 0;
2356 int got_some_input
= 0;
2357 Lisp_Object
*wait_for_cell
= 0;
2359 FD_ZERO (&Available
);
2361 /* If read_kbd is a process to watch, set wait_proc and wait_channel
2363 if (PROCESSP (read_kbd
))
2365 wait_proc
= XPROCESS (read_kbd
);
2366 wait_channel
= XINT (wait_proc
->infd
);
2367 XSETFASTINT (read_kbd
, 0);
2370 /* If waiting for non-nil in a cell, record where. */
2371 if (CONSP (read_kbd
))
2373 wait_for_cell
= &XCAR (read_kbd
);
2374 XSETFASTINT (read_kbd
, 0);
2377 waiting_for_user_input_p
= XINT (read_kbd
);
2379 /* Since we may need to wait several times,
2380 compute the absolute time to return at. */
2381 if (time_limit
|| microsecs
)
2383 EMACS_GET_TIME (end_time
);
2384 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
2385 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
2388 /* AlainF 5-Jul-1996
2389 HP-UX 10.10 seem to have problems with signals coming in
2390 Causes "poll: interrupted system call" messages when Emacs is run
2392 Turn off periodic alarms (in case they are in use) */
2393 turn_on_atimers (0);
2398 int timeout_reduced_for_timers
= 0;
2400 /* If calling from keyboard input, do not quit
2401 since we want to return C-g as an input character.
2402 Otherwise, do pending quit if requested. */
2403 if (XINT (read_kbd
) >= 0)
2406 /* Exit now if the cell we're waiting for became non-nil. */
2407 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2410 /* Compute time from now till when time limit is up */
2411 /* Exit if already run out */
2412 if (time_limit
== -1)
2414 /* -1 specified for timeout means
2415 gobble output available now
2416 but don't wait at all. */
2418 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2420 else if (time_limit
|| microsecs
)
2422 EMACS_GET_TIME (timeout
);
2423 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
2424 if (EMACS_TIME_NEG_P (timeout
))
2429 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
2432 /* Normally we run timers here.
2433 But not if wait_for_cell; in those cases,
2434 the wait is supposed to be short,
2435 and those callers cannot handle running arbitrary Lisp code here. */
2436 if (! wait_for_cell
)
2438 EMACS_TIME timer_delay
;
2442 old_timers_run
= timers_run
;
2443 timer_delay
= timer_check (1);
2444 if (timers_run
!= old_timers_run
&& do_display
)
2446 redisplay_preserve_echo_area ();
2447 /* We must retry, since a timer may have requeued itself
2448 and that could alter the time_delay. */
2452 /* If there is unread keyboard input, also return. */
2453 if (XINT (read_kbd
) != 0
2454 && requeued_events_pending_p ())
2457 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
2459 EMACS_TIME difference
;
2460 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
2461 if (EMACS_TIME_NEG_P (difference
))
2463 timeout
= timer_delay
;
2464 timeout_reduced_for_timers
= 1;
2467 /* If time_limit is -1, we are not going to wait at all. */
2468 else if (time_limit
!= -1)
2470 /* This is so a breakpoint can be put here. */
2471 wait_reading_process_input_1 ();
2475 /* Cause C-g and alarm signals to take immediate action,
2476 and cause input available signals to zero out timeout.
2478 It is important that we do this before checking for process
2479 activity. If we get a SIGCHLD after the explicit checks for
2480 process activity, timeout is the only way we will know. */
2481 if (XINT (read_kbd
) < 0)
2482 set_waiting_for_input (&timeout
);
2484 /* If status of something has changed, and no input is
2485 available, notify the user of the change right away. After
2486 this explicit check, we'll let the SIGCHLD handler zap
2487 timeout to get our attention. */
2488 if (update_tick
!= process_tick
&& do_display
)
2490 Atemp
= input_wait_mask
;
2491 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2492 if ((select (max (max_process_desc
, max_keyboard_desc
) + 1,
2493 &Atemp
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2497 /* It's okay for us to do this and then continue with
2498 the loop, since timeout has already been zeroed out. */
2499 clear_waiting_for_input ();
2504 /* Don't wait for output from a non-running process. */
2505 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
2506 update_status (wait_proc
);
2508 && ! EQ (wait_proc
->status
, Qrun
))
2510 int nread
, total_nread
= 0;
2512 clear_waiting_for_input ();
2513 XSETPROCESS (proc
, wait_proc
);
2515 /* Read data from the process, until we exhaust it. */
2516 while (XINT (wait_proc
->infd
) >= 0)
2518 nread
= read_process_output (proc
, XINT (wait_proc
->infd
));
2524 total_nread
+= nread
;
2526 else if (nread
== -1 && EIO
== errno
)
2530 else if (nread
== -1 && EAGAIN
== errno
)
2534 else if (nread
== -1 && EWOULDBLOCK
== errno
)
2538 if (total_nread
> 0 && do_display
)
2539 redisplay_preserve_echo_area ();
2544 /* Wait till there is something to do */
2547 Available
= non_process_wait_mask
;
2548 else if (! XINT (read_kbd
))
2549 Available
= non_keyboard_wait_mask
;
2551 Available
= input_wait_mask
;
2553 /* If frame size has changed or the window is newly mapped,
2554 redisplay now, before we start to wait. There is a race
2555 condition here; if a SIGIO arrives between now and the select
2556 and indicates that a frame is trashed, the select may block
2557 displaying a trashed screen. */
2558 if (frame_garbaged
&& do_display
)
2560 clear_waiting_for_input ();
2561 redisplay_preserve_echo_area ();
2562 if (XINT (read_kbd
) < 0)
2563 set_waiting_for_input (&timeout
);
2566 if (XINT (read_kbd
) && detect_input_pending ())
2569 FD_ZERO (&Available
);
2572 nfds
= select (max (max_process_desc
, max_keyboard_desc
) + 1,
2573 &Available
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2578 /* Make C-g and alarm signals set flags again */
2579 clear_waiting_for_input ();
2581 /* If we woke up due to SIGWINCH, actually change size now. */
2582 do_pending_window_change (0);
2584 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
2585 /* We wanted the full specified time, so return now. */
2589 if (xerrno
== EINTR
)
2590 FD_ZERO (&Available
);
2592 /* Ultrix select seems to return ENOMEM when it is
2593 interrupted. Treat it just like EINTR. Bleah. Note
2594 that we want to test for the "ultrix" CPP symbol, not
2595 "__ultrix__"; the latter is only defined under GCC, but
2596 not by DEC's bundled CC. -JimB */
2597 else if (xerrno
== ENOMEM
)
2598 FD_ZERO (&Available
);
2601 /* This happens for no known reason on ALLIANT.
2602 I am guessing that this is the right response. -- RMS. */
2603 else if (xerrno
== EFAULT
)
2604 FD_ZERO (&Available
);
2606 else if (xerrno
== EBADF
)
2609 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
2610 the child's closure of the pts gives the parent a SIGHUP, and
2611 the ptc file descriptor is automatically closed,
2612 yielding EBADF here or at select() call above.
2613 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
2614 in m/ibmrt-aix.h), and here we just ignore the select error.
2615 Cleanup occurs c/o status_notify after SIGCLD. */
2616 FD_ZERO (&Available
); /* Cannot depend on values returned */
2622 error ("select error: %s", emacs_strerror (xerrno
));
2624 #if defined(sun) && !defined(USG5_4)
2625 else if (nfds
> 0 && keyboard_bit_set (&Available
)
2627 /* System sometimes fails to deliver SIGIO.
2629 David J. Mackenzie says that Emacs doesn't compile under
2630 Solaris if this code is enabled, thus the USG5_4 in the CPP
2631 conditional. "I haven't noticed any ill effects so far.
2632 If you find a Solaris expert somewhere, they might know
2634 kill (getpid (), SIGIO
);
2637 #if 0 /* When polling is used, interrupt_input is 0,
2638 so get_input_pending should read the input.
2639 So this should not be needed. */
2640 /* If we are using polling for input,
2641 and we see input available, make it get read now.
2642 Otherwise it might not actually get read for a second.
2643 And on hpux, since we turn off polling in wait_reading_process_input,
2644 it might never get read at all if we don't spend much time
2645 outside of wait_reading_process_input. */
2646 if (XINT (read_kbd
) && interrupt_input
2647 && keyboard_bit_set (&Available
)
2648 && input_polling_used ())
2649 kill (getpid (), SIGALRM
);
2652 /* Check for keyboard input */
2653 /* If there is any, return immediately
2654 to give it higher priority than subprocesses */
2656 if (XINT (read_kbd
) != 0
2657 && detect_input_pending_run_timers (do_display
))
2659 swallow_events (do_display
);
2660 if (detect_input_pending_run_timers (do_display
))
2664 /* If there is unread keyboard input, also return. */
2665 if (XINT (read_kbd
) != 0
2666 && requeued_events_pending_p ())
2669 /* If we are not checking for keyboard input now,
2670 do process events (but don't run any timers).
2671 This is so that X events will be processed.
2672 Otherwise they may have to wait until polling takes place.
2673 That would causes delays in pasting selections, for example.
2675 (We used to do this only if wait_for_cell.) */
2676 if (XINT (read_kbd
) == 0 && detect_input_pending ())
2678 swallow_events (do_display
);
2679 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
2680 if (detect_input_pending ())
2685 /* Exit now if the cell we're waiting for became non-nil. */
2686 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2690 /* If we think we have keyboard input waiting, but didn't get SIGIO,
2691 go read it. This can happen with X on BSD after logging out.
2692 In that case, there really is no input and no SIGIO,
2693 but select says there is input. */
2695 if (XINT (read_kbd
) && interrupt_input
2696 && keyboard_bit_set (&Available
))
2697 kill (getpid (), SIGIO
);
2701 got_some_input
|= nfds
> 0;
2703 /* If checking input just got us a size-change event from X,
2704 obey it now if we should. */
2705 if (XINT (read_kbd
) || wait_for_cell
)
2706 do_pending_window_change (0);
2708 /* Check for data from a process. */
2709 /* Really FIRST_PROC_DESC should be 0 on Unix,
2710 but this is safer in the short run. */
2711 for (channel
= 0; channel
<= max_process_desc
; channel
++)
2713 if (FD_ISSET (channel
, &Available
)
2714 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
2718 /* If waiting for this channel, arrange to return as
2719 soon as no more input to be processed. No more
2721 if (wait_channel
== channel
)
2727 proc
= chan_process
[channel
];
2731 /* Read data from the process, starting with our
2732 buffered-ahead character if we have one. */
2734 nread
= read_process_output (proc
, channel
);
2737 /* Since read_process_output can run a filter,
2738 which can call accept-process-output,
2739 don't try to read from any other processes
2740 before doing the select again. */
2741 FD_ZERO (&Available
);
2744 redisplay_preserve_echo_area ();
2747 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2750 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
2751 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
2753 else if (nread
== -1 && errno
== EAGAIN
)
2757 else if (nread
== -1 && errno
== EAGAIN
)
2759 /* Note that we cannot distinguish between no input
2760 available now and a closed pipe.
2761 With luck, a closed pipe will be accompanied by
2762 subprocess termination and SIGCHLD. */
2763 else if (nread
== 0 && !NETCONN_P (proc
))
2765 #endif /* O_NDELAY */
2766 #endif /* O_NONBLOCK */
2768 /* On some OSs with ptys, when the process on one end of
2769 a pty exits, the other end gets an error reading with
2770 errno = EIO instead of getting an EOF (0 bytes read).
2771 Therefore, if we get an error reading and errno =
2772 EIO, just continue, because the child process has
2773 exited and should clean itself up soon (e.g. when we
2776 However, it has been known to happen that the SIGCHLD
2777 got lost. So raise the signl again just in case.
2779 else if (nread
== -1 && errno
== EIO
)
2780 kill (getpid (), SIGCHLD
);
2781 #endif /* HAVE_PTYS */
2782 /* If we can detect process termination, don't consider the process
2783 gone just because its pipe is closed. */
2785 else if (nread
== 0 && !NETCONN_P (proc
))
2790 /* Preserve status of processes already terminated. */
2791 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2792 deactivate_process (proc
);
2793 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2794 update_status (XPROCESS (proc
));
2795 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2796 XPROCESS (proc
)->status
2797 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2800 } /* end for each file descriptor */
2801 } /* end while exit conditions not met */
2803 waiting_for_user_input_p
= 0;
2805 /* If calling from keyboard input, do not quit
2806 since we want to return C-g as an input character.
2807 Otherwise, do pending quit if requested. */
2808 if (XINT (read_kbd
) >= 0)
2810 /* Prevent input_pending from remaining set if we quit. */
2811 clear_input_pending ();
2815 /* AlainF 5-Jul-1996
2816 HP-UX 10.10 seems to have problems with signals coming in
2817 Causes "poll: interrupted system call" messages when Emacs is run
2819 Turn periodic alarms back on */
2823 return got_some_input
;
2826 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
2829 read_process_output_call (fun_and_args
)
2830 Lisp_Object fun_and_args
;
2832 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
2836 read_process_output_error_handler (error
)
2839 cmd_error_internal (error
, "error in process filter: ");
2841 update_echo_area ();
2842 Fsleep_for (make_number (2), Qnil
);
2846 /* Read pending output from the process channel,
2847 starting with our buffered-ahead character if we have one.
2848 Yield number of decoded characters read.
2850 This function reads at most 1024 characters.
2851 If you want to read all available subprocess output,
2852 you must call it repeatedly until it returns zero.
2854 The characters read are decoded according to PROC's coding-system
2858 read_process_output (proc
, channel
)
2860 register int channel
;
2862 register int nchars
, nbytes
;
2864 register Lisp_Object outstream
;
2865 register struct buffer
*old
= current_buffer
;
2866 register struct Lisp_Process
*p
= XPROCESS (proc
);
2867 register int opoint
;
2868 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
2869 int carryover
= XINT (p
->decoding_carryover
);
2872 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2874 vs
= get_vms_process_pointer (p
->pid
);
2878 return (0); /* Really weird if it does this */
2879 if (!(vs
->iosb
[0] & 1))
2880 return -1; /* I/O error */
2883 error ("Could not get VMS process pointer");
2884 chars
= vs
->inputBuffer
;
2885 nbytes
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2888 start_vms_process_read (vs
); /* Crank up the next read on the process */
2889 return 1; /* Nothing worth printing, say we got 1 */
2893 /* The data carried over in the previous decoding (which are at
2894 the tail of decoding buffer) should be prepended to the new
2895 data read to decode all together. */
2896 chars
= (char *) alloca (nbytes
+ carryover
);
2897 bcopy (XSTRING (p
->decoding_buf
)->data
, buf
, carryover
);
2898 bcopy (vs
->inputBuffer
, chars
+ carryover
, nbytes
);
2901 chars
= (char *) alloca (carryover
+ 1024);
2903 /* See the comment above. */
2904 bcopy (XSTRING (p
->decoding_buf
)->data
, chars
, carryover
);
2906 if (proc_buffered_char
[channel
] < 0)
2907 nbytes
= emacs_read (channel
, chars
+ carryover
, 1024 - carryover
);
2910 chars
[carryover
] = proc_buffered_char
[channel
];
2911 proc_buffered_char
[channel
] = -1;
2912 nbytes
= emacs_read (channel
, chars
+ carryover
+ 1, 1023 - carryover
);
2916 nbytes
= nbytes
+ 1;
2918 #endif /* not VMS */
2920 XSETINT (p
->decoding_carryover
, 0);
2922 /* At this point, NBYTES holds number of bytes just received
2923 (including the one in proc_buffered_char[channel]). */
2926 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
2928 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
2931 /* Now set NBYTES how many bytes we must decode. */
2932 nbytes
+= carryover
;
2934 /* Read and dispose of the process output. */
2935 outstream
= p
->filter
;
2936 if (!NILP (outstream
))
2938 /* We inhibit quit here instead of just catching it so that
2939 hitting ^G when a filter happens to be running won't screw
2941 int count
= specpdl_ptr
- specpdl
;
2942 Lisp_Object odeactivate
;
2943 Lisp_Object obuffer
, okeymap
;
2945 int outer_running_asynch_code
= running_asynch_code
;
2946 int waiting
= waiting_for_user_input_p
;
2948 /* No need to gcpro these, because all we do with them later
2949 is test them for EQness, and none of them should be a string. */
2950 odeactivate
= Vdeactivate_mark
;
2951 XSETBUFFER (obuffer
, current_buffer
);
2952 okeymap
= current_buffer
->keymap
;
2954 specbind (Qinhibit_quit
, Qt
);
2955 specbind (Qlast_nonmenu_event
, Qt
);
2957 /* In case we get recursively called,
2958 and we already saved the match data nonrecursively,
2959 save the same match data in safely recursive fashion. */
2960 if (outer_running_asynch_code
)
2963 /* Don't clobber the CURRENT match data, either! */
2964 tem
= Fmatch_data (Qnil
, Qnil
);
2965 restore_match_data ();
2966 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
2967 Fset_match_data (tem
);
2970 /* For speed, if a search happens within this code,
2971 save the match data in a special nonrecursive fashion. */
2972 running_asynch_code
= 1;
2974 text
= decode_coding_string (make_unibyte_string (chars
, nbytes
),
2976 if (NILP (buffer_defaults
.enable_multibyte_characters
))
2977 /* We had better return unibyte string. */
2978 text
= string_make_unibyte (text
);
2980 Vlast_coding_system_used
= coding
->symbol
;
2981 /* A new coding system might be found. */
2982 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
2984 p
->decode_coding_system
= coding
->symbol
;
2986 /* Don't call setup_coding_system for
2987 proc_decode_coding_system[channel] here. It is done in
2988 detect_coding called via decode_coding above. */
2990 /* If a coding system for encoding is not yet decided, we set
2991 it as the same as coding-system for decoding.
2993 But, before doing that we must check if
2994 proc_encode_coding_system[p->outfd] surely points to a
2995 valid memory because p->outfd will be changed once EOF is
2996 sent to the process. */
2997 if (NILP (p
->encode_coding_system
)
2998 && proc_encode_coding_system
[XINT (p
->outfd
)])
3000 p
->encode_coding_system
= coding
->symbol
;
3001 setup_coding_system (coding
->symbol
,
3002 proc_encode_coding_system
[XINT (p
->outfd
)]);
3006 carryover
= nbytes
- coding
->consumed
;
3007 bcopy (chars
+ coding
->consumed
, XSTRING (p
->decoding_buf
)->data
,
3009 XSETINT (p
->decoding_carryover
, carryover
);
3010 nbytes
= STRING_BYTES (XSTRING (text
));
3011 nchars
= XSTRING (text
)->size
;
3012 internal_condition_case_1 (read_process_output_call
,
3014 Fcons (proc
, Fcons (text
, Qnil
))),
3015 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
3016 read_process_output_error_handler
);
3018 /* If we saved the match data nonrecursively, restore it now. */
3019 restore_match_data ();
3020 running_asynch_code
= outer_running_asynch_code
;
3022 /* Handling the process output should not deactivate the mark. */
3023 Vdeactivate_mark
= odeactivate
;
3025 /* Restore waiting_for_user_input_p as it was
3026 when we were called, in case the filter clobbered it. */
3027 waiting_for_user_input_p
= waiting
;
3029 #if 0 /* Call record_asynch_buffer_change unconditionally,
3030 because we might have changed minor modes or other things
3031 that affect key bindings. */
3032 if (! EQ (Fcurrent_buffer (), obuffer
)
3033 || ! EQ (current_buffer
->keymap
, okeymap
))
3035 /* But do it only if the caller is actually going to read events.
3036 Otherwise there's no need to make him wake up, and it could
3037 cause trouble (for example it would make Fsit_for return). */
3038 if (waiting_for_user_input_p
== -1)
3039 record_asynch_buffer_change ();
3042 start_vms_process_read (vs
);
3044 unbind_to (count
, Qnil
);
3048 /* If no filter, write into buffer if it isn't dead. */
3049 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
3051 Lisp_Object old_read_only
;
3052 int old_begv
, old_zv
;
3053 int old_begv_byte
, old_zv_byte
;
3054 Lisp_Object odeactivate
;
3055 int before
, before_byte
;
3059 odeactivate
= Vdeactivate_mark
;
3061 Fset_buffer (p
->buffer
);
3063 opoint_byte
= PT_BYTE
;
3064 old_read_only
= current_buffer
->read_only
;
3067 old_begv_byte
= BEGV_BYTE
;
3068 old_zv_byte
= ZV_BYTE
;
3070 current_buffer
->read_only
= Qnil
;
3072 /* Insert new output into buffer
3073 at the current end-of-output marker,
3074 thus preserving logical ordering of input and output. */
3075 if (XMARKER (p
->mark
)->buffer
)
3076 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
3077 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
3080 SET_PT_BOTH (ZV
, ZV_BYTE
);
3082 before_byte
= PT_BYTE
;
3084 /* If the output marker is outside of the visible region, save
3085 the restriction and widen. */
3086 if (! (BEGV
<= PT
&& PT
<= ZV
))
3089 text
= decode_coding_string (make_unibyte_string (chars
, nbytes
),
3091 Vlast_coding_system_used
= coding
->symbol
;
3092 /* A new coding system might be found. See the comment in the
3093 similar code in the previous `if' block. */
3094 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
3096 p
->decode_coding_system
= coding
->symbol
;
3097 if (NILP (p
->encode_coding_system
)
3098 && proc_encode_coding_system
[XINT (p
->outfd
)])
3100 p
->encode_coding_system
= coding
->symbol
;
3101 setup_coding_system (coding
->symbol
,
3102 proc_encode_coding_system
[XINT (p
->outfd
)]);
3105 carryover
= nbytes
- coding
->consumed
;
3106 bcopy (chars
+ coding
->consumed
, XSTRING (p
->decoding_buf
)->data
,
3108 XSETINT (p
->decoding_carryover
, carryover
);
3109 /* Adjust the multibyteness of TEXT to that of the buffer. */
3110 if (NILP (current_buffer
->enable_multibyte_characters
)
3111 != ! STRING_MULTIBYTE (text
))
3112 text
= (STRING_MULTIBYTE (text
)
3113 ? Fstring_as_unibyte (text
)
3114 : Fstring_as_multibyte (text
));
3115 nbytes
= STRING_BYTES (XSTRING (text
));
3116 nchars
= XSTRING (text
)->size
;
3117 /* Insert before markers in case we are inserting where
3118 the buffer's mark is, and the user's next command is Meta-y. */
3119 insert_from_string_before_markers (text
, 0, 0, nchars
, nbytes
, 0);
3120 signal_after_change (before
, 0, PT
- before
);
3121 update_compositions (before
, PT
, CHECK_BORDER
);
3123 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
3125 update_mode_lines
++;
3127 /* Make sure opoint and the old restrictions
3128 float ahead of any new text just as point would. */
3129 if (opoint
>= before
)
3131 opoint
+= PT
- before
;
3132 opoint_byte
+= PT_BYTE
- before_byte
;
3134 if (old_begv
> before
)
3136 old_begv
+= PT
- before
;
3137 old_begv_byte
+= PT_BYTE
- before_byte
;
3139 if (old_zv
>= before
)
3141 old_zv
+= PT
- before
;
3142 old_zv_byte
+= PT_BYTE
- before_byte
;
3145 /* If the restriction isn't what it should be, set it. */
3146 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
3147 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
3149 /* Handling the process output should not deactivate the mark. */
3150 Vdeactivate_mark
= odeactivate
;
3152 current_buffer
->read_only
= old_read_only
;
3153 SET_PT_BOTH (opoint
, opoint_byte
);
3154 set_buffer_internal (old
);
3157 start_vms_process_read (vs
);
3162 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
3164 "Returns non-nil if emacs is waiting for input from the user.\n\
3165 This is intended for use by asynchronous process output filters and sentinels.")
3168 return (waiting_for_user_input_p
? Qt
: Qnil
);
3171 /* Sending data to subprocess */
3173 jmp_buf send_process_frame
;
3174 Lisp_Object process_sent_to
;
3177 send_process_trap ()
3183 longjmp (send_process_frame
, 1);
3186 /* Send some data to process PROC.
3187 BUF is the beginning of the data; LEN is the number of characters.
3188 OBJECT is the Lisp object that the data comes from.
3190 The data is encoded by PROC's coding-system for encoding before it
3191 is sent. But if the data ends at the middle of multi-byte
3192 representation, that incomplete sequence of bytes are sent without
3193 being encoded. Should we store them in a buffer to prepend them to
3194 the data send later?
3196 This function can evaluate Lisp code and can garbage collect. */
3199 send_process (proc
, buf
, len
, object
)
3200 volatile Lisp_Object proc
;
3201 unsigned char *volatile buf
;
3203 volatile Lisp_Object object
;
3205 /* Use volatile to protect variables from being clobbered by longjmp. */
3207 struct coding_system
*coding
;
3208 struct gcpro gcpro1
;
3213 struct Lisp_Process
*p
= XPROCESS (proc
);
3214 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
3217 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3218 update_status (XPROCESS (proc
));
3219 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3220 error ("Process %s not running",
3221 XSTRING (XPROCESS (proc
)->name
)->data
);
3222 if (XINT (XPROCESS (proc
)->outfd
) < 0)
3223 error ("Output file descriptor of %s is closed",
3224 XSTRING (XPROCESS (proc
)->name
)->data
);
3226 coding
= proc_encode_coding_system
[XINT (XPROCESS (proc
)->outfd
)];
3227 Vlast_coding_system_used
= coding
->symbol
;
3229 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
3230 || (BUFFERP (object
)
3231 && !NILP (XBUFFER (object
)->enable_multibyte_characters
)))
3233 coding
->src_multibyte
= 1;
3234 if (!EQ (coding
->symbol
, XPROCESS (proc
)->encode_coding_system
))
3235 /* The coding system for encoding was changed to raw-text
3236 because we sent a unibyte text previously. Now we are
3237 sending a multibyte text, thus we must encode it by the
3238 original coding system specified for the current
3240 setup_coding_system (XPROCESS (proc
)->encode_coding_system
,
3245 coding
->src_multibyte
= 0;
3246 /* For sending a unibyte text, character code conversion
3247 should not take place but EOL conversion should. So, setup
3248 raw-text or one of the subsidiary. */
3249 setup_raw_text_coding_system (coding
);
3251 coding
->dst_multibyte
= 0;
3253 if (CODING_REQUIRE_ENCODING (coding
))
3255 int require
= encoding_buffer_size (coding
, len
);
3256 int from_byte
= -1, from
= -1, to
= -1;
3257 unsigned char *temp_buf
= NULL
;
3259 if (BUFFERP (object
))
3261 from_byte
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
3262 from
= buf_bytepos_to_charpos (XBUFFER (object
), from_byte
);
3263 to
= buf_bytepos_to_charpos (XBUFFER (object
), from_byte
+ len
);
3265 else if (STRINGP (object
))
3267 from_byte
= buf
- XSTRING (object
)->data
;
3268 from
= string_byte_to_char (object
, from_byte
);
3269 to
= string_byte_to_char (object
, from_byte
+ len
);
3272 if (from_byte
>= 0 && coding
->composing
!= COMPOSITION_DISABLED
)
3273 coding_save_composition (coding
, from
, to
, object
);
3275 if (STRING_BYTES (XSTRING (XPROCESS (proc
)->encoding_buf
)) < require
)
3276 XPROCESS (proc
)->encoding_buf
= make_uninit_string (require
);
3279 buf
= (BUFFERP (object
)
3280 ? BUF_BYTE_ADDRESS (XBUFFER (object
), from_byte
)
3281 : XSTRING (object
)->data
+ from_byte
);
3283 object
= XPROCESS (proc
)->encoding_buf
;
3284 encode_coding (coding
, (char *) buf
, XSTRING (object
)->data
,
3285 len
, STRING_BYTES (XSTRING (object
)));
3286 len
= coding
->produced
;
3287 buf
= XSTRING (object
)->data
;
3293 vs
= get_vms_process_pointer (p
->pid
);
3295 error ("Could not find this process: %x", p
->pid
);
3296 else if (write_to_vms_process (vs
, buf
, len
))
3300 if (pty_max_bytes
== 0)
3302 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
3303 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
3305 if (pty_max_bytes
< 0)
3306 pty_max_bytes
= 250;
3308 pty_max_bytes
= 250;
3310 /* Deduct one, to leave space for the eof. */
3314 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
3315 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
3316 when returning with longjmp despite being declared volatile. */
3317 if (!setjmp (send_process_frame
))
3319 process_sent_to
= proc
;
3323 SIGTYPE (*old_sigpipe
)();
3325 /* Decide how much data we can send in one batch.
3326 Long lines need to be split into multiple batches. */
3327 if (!NILP (XPROCESS (proc
)->pty_flag
))
3329 /* Starting this at zero is always correct when not the first iteration
3330 because the previous iteration ended by sending C-d.
3331 It may not be correct for the first iteration
3332 if a partial line was sent in a separate send_process call.
3333 If that proves worth handling, we need to save linepos
3334 in the process object. */
3336 unsigned char *ptr
= (unsigned char *) buf
;
3337 unsigned char *end
= (unsigned char *) buf
+ len
;
3339 /* Scan through this text for a line that is too long. */
3340 while (ptr
!= end
&& linepos
< pty_max_bytes
)
3348 /* If we found one, break the line there
3349 and put in a C-d to force the buffer through. */
3353 /* Send this batch, using one or more write calls. */
3356 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
3357 rv
= emacs_write (XINT (XPROCESS (proc
)->outfd
),
3358 (char *) buf
, this);
3359 signal (SIGPIPE
, old_sigpipe
);
3365 || errno
== EWOULDBLOCK
3371 /* Buffer is full. Wait, accepting input;
3372 that may allow the program
3373 to finish doing output and read more. */
3378 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
3379 /* A gross hack to work around a bug in FreeBSD.
3380 In the following sequence, read(2) returns
3384 write(2) 954 bytes, get EAGAIN
3385 read(2) 1024 bytes in process_read_output
3386 read(2) 11 bytes in process_read_output
3388 That is, read(2) returns more bytes than have
3389 ever been written successfully. The 1033 bytes
3390 read are the 1022 bytes written successfully
3391 after processing (for example with CRs added if
3392 the terminal is set up that way which it is
3393 here). The same bytes will be seen again in a
3394 later read(2), without the CRs. */
3396 if (errno
== EAGAIN
)
3399 ioctl (XINT (XPROCESS (proc
)->outfd
), TIOCFLUSH
,
3402 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
3404 /* Running filters might relocate buffers or strings.
3405 Arrange to relocate BUF. */
3406 if (BUFFERP (object
))
3407 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
3408 else if (STRINGP (object
))
3409 offset
= buf
- XSTRING (object
)->data
;
3411 XSETFASTINT (zero
, 0);
3412 #ifdef EMACS_HAS_USECS
3413 wait_reading_process_input (0, 20000, zero
, 0);
3415 wait_reading_process_input (1, 0, zero
, 0);
3418 if (BUFFERP (object
))
3419 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
3420 else if (STRINGP (object
))
3421 buf
= offset
+ XSTRING (object
)->data
;
3426 /* This is a real error. */
3427 report_file_error ("writing to process", Fcons (proc
, Qnil
));
3434 /* If we sent just part of the string, put in an EOF
3435 to force it through, before we send the rest. */
3437 Fprocess_send_eof (proc
);
3440 #endif /* not VMS */
3444 proc
= process_sent_to
;
3446 XPROCESS (proc
)->raw_status_low
= Qnil
;
3447 XPROCESS (proc
)->raw_status_high
= Qnil
;
3448 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
3449 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
3450 deactivate_process (proc
);
3452 error ("Error writing to process %s; closed it",
3453 XSTRING (XPROCESS (proc
)->name
)->data
);
3455 error ("SIGPIPE raised on process %s; closed it",
3456 XSTRING (XPROCESS (proc
)->name
)->data
);
3463 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
3465 "Send current contents of region as input to PROCESS.\n\
3466 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3467 nil, indicating the current buffer's process.\n\
3468 Called from program, takes three arguments, PROCESS, START and END.\n\
3469 If the region is more than 500 characters long,\n\
3470 it is sent in several bunches. This may happen even for shorter regions.\n\
3471 Output from processes can arrive in between bunches.")
3472 (process
, start
, end
)
3473 Lisp_Object process
, start
, end
;
3478 proc
= get_process (process
);
3479 validate_region (&start
, &end
);
3481 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
3482 move_gap (XINT (start
));
3484 start1
= CHAR_TO_BYTE (XINT (start
));
3485 end1
= CHAR_TO_BYTE (XINT (end
));
3486 send_process (proc
, BYTE_POS_ADDR (start1
), end1
- start1
,
3487 Fcurrent_buffer ());
3492 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
3494 "Send PROCESS the contents of STRING as input.\n\
3495 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3496 nil, indicating the current buffer's process.\n\
3497 If STRING is more than 500 characters long,\n\
3498 it is sent in several bunches. This may happen even for shorter strings.\n\
3499 Output from processes can arrive in between bunches.")
3501 Lisp_Object process
, string
;
3504 CHECK_STRING (string
, 1);
3505 proc
= get_process (process
);
3506 send_process (proc
, XSTRING (string
)->data
,
3507 STRING_BYTES (XSTRING (string
)), string
);
3511 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
3512 Sprocess_running_child_p
, 0, 1, 0,
3513 "Return t if PROCESS has given the terminal to a child.\n\
3514 If the operating system does not make it possible to find out,\n\
3515 return t unconditionally.")
3517 Lisp_Object process
;
3519 /* Initialize in case ioctl doesn't exist or gives an error,
3520 in a way that will cause returning t. */
3523 struct Lisp_Process
*p
;
3525 proc
= get_process (process
);
3526 p
= XPROCESS (proc
);
3528 if (!EQ (p
->childp
, Qt
))
3529 error ("Process %s is not a subprocess",
3530 XSTRING (p
->name
)->data
);
3531 if (XINT (p
->infd
) < 0)
3532 error ("Process %s is not active",
3533 XSTRING (p
->name
)->data
);
3536 if (!NILP (p
->subtty
))
3537 ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
3539 ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
3540 #endif /* defined (TIOCGPGRP ) */
3542 if (gid
== XFASTINT (p
->pid
))
3547 /* send a signal number SIGNO to PROCESS.
3548 If CURRENT_GROUP is t, that means send to the process group
3549 that currently owns the terminal being used to communicate with PROCESS.
3550 This is used for various commands in shell mode.
3551 If CURRENT_GROUP is lambda, that means send to the process group
3552 that currently owns the terminal, but only if it is NOT the shell itself.
3554 If NOMSG is zero, insert signal-announcements into process's buffers
3557 If we can, we try to signal PROCESS by sending control characters
3558 down the pty. This allows us to signal inferiors who have changed
3559 their uid, for which killpg would return an EPERM error. */
3562 process_send_signal (process
, signo
, current_group
, nomsg
)
3563 Lisp_Object process
;
3565 Lisp_Object current_group
;
3569 register struct Lisp_Process
*p
;
3573 proc
= get_process (process
);
3574 p
= XPROCESS (proc
);
3576 if (!EQ (p
->childp
, Qt
))
3577 error ("Process %s is not a subprocess",
3578 XSTRING (p
->name
)->data
);
3579 if (XINT (p
->infd
) < 0)
3580 error ("Process %s is not active",
3581 XSTRING (p
->name
)->data
);
3583 if (NILP (p
->pty_flag
))
3584 current_group
= Qnil
;
3586 /* If we are using pgrps, get a pgrp number and make it negative. */
3587 if (!NILP (current_group
))
3589 #ifdef SIGNALS_VIA_CHARACTERS
3590 /* If possible, send signals to the entire pgrp
3591 by sending an input character to it. */
3593 /* TERMIOS is the latest and bestest, and seems most likely to
3594 work. If the system has it, use it. */
3601 tcgetattr (XINT (p
->infd
), &t
);
3602 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
3606 tcgetattr (XINT (p
->infd
), &t
);
3607 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
3611 tcgetattr (XINT (p
->infd
), &t
);
3612 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
3613 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
3615 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
3620 #else /* ! HAVE_TERMIOS */
3622 /* On Berkeley descendants, the following IOCTL's retrieve the
3623 current control characters. */
3624 #if defined (TIOCGLTC) && defined (TIOCGETC)
3632 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
3633 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
3636 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
3637 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
3641 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
3642 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
3644 #endif /* ! defined (SIGTSTP) */
3647 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
3649 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
3656 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3657 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
3660 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3661 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
3665 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3666 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
3668 #endif /* ! defined (SIGTSTP) */
3670 #else /* ! defined (TCGETA) */
3671 Your configuration files are messed up
.
3672 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
3673 you'd better be using one of the alternatives above! */
3674 #endif /* ! defined (TCGETA) */
3675 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
3676 #endif /* ! defined HAVE_TERMIOS */
3677 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
3680 /* Get the pgrp using the tty itself, if we have that.
3681 Otherwise, use the pty to get the pgrp.
3682 On pfa systems, saka@pfu.fujitsu.co.JP writes:
3683 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
3684 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
3685 His patch indicates that if TIOCGPGRP returns an error, then
3686 we should just assume that p->pid is also the process group id. */
3690 if (!NILP (p
->subtty
))
3691 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
3693 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
3697 gid
= - XFASTINT (p
->pid
);
3698 #endif /* ! defined (pfa) */
3704 #else /* ! defined (TIOCGPGRP ) */
3705 /* Can't select pgrps on this system, so we know that
3706 the child itself heads the pgrp. */
3707 gid
= - XFASTINT (p
->pid
);
3708 #endif /* ! defined (TIOCGPGRP ) */
3710 /* If current_group is lambda, and the shell owns the terminal,
3711 don't send any signal. */
3712 if (EQ (current_group
, Qlambda
) && gid
== - XFASTINT (p
->pid
))
3716 gid
= - XFASTINT (p
->pid
);
3722 p
->raw_status_low
= Qnil
;
3723 p
->raw_status_high
= Qnil
;
3725 XSETINT (p
->tick
, ++process_tick
);
3729 #endif /* ! defined (SIGCONT) */
3732 send_process (proc
, "\003", 1, Qnil
); /* ^C */
3737 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
3742 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
3745 flush_pending_output (XINT (p
->infd
));
3749 /* If we don't have process groups, send the signal to the immediate
3750 subprocess. That isn't really right, but it's better than any
3751 obvious alternative. */
3754 kill (XFASTINT (p
->pid
), signo
);
3758 /* gid may be a pid, or minus a pgrp's number */
3760 if (!NILP (current_group
))
3761 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
3764 gid
= - XFASTINT (p
->pid
);
3767 #else /* ! defined (TIOCSIGSEND) */
3768 EMACS_KILLPG (-gid
, signo
);
3769 #endif /* ! defined (TIOCSIGSEND) */
3772 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
3773 "Interrupt process PROCESS.\n\
3774 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
3775 nil or no arg means current buffer's process.\n\
3776 Second arg CURRENT-GROUP non-nil means send signal to\n\
3777 the current process-group of the process's controlling terminal\n\
3778 rather than to the process's own process group.\n\
3779 If the process is a shell, this means interrupt current subjob\n\
3780 rather than the shell.\n\
3782 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,\n\
3783 don't send the signal.")
3784 (process
, current_group
)
3785 Lisp_Object process
, current_group
;
3787 process_send_signal (process
, SIGINT
, current_group
, 0);
3791 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
3792 "Kill process PROCESS. May be process or name of one.\n\
3793 See function `interrupt-process' for more details on usage.")
3794 (process
, current_group
)
3795 Lisp_Object process
, current_group
;
3797 process_send_signal (process
, SIGKILL
, current_group
, 0);
3801 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
3802 "Send QUIT signal to process PROCESS. May be process or name of one.\n\
3803 See function `interrupt-process' for more details on usage.")
3804 (process
, current_group
)
3805 Lisp_Object process
, current_group
;
3807 process_send_signal (process
, SIGQUIT
, current_group
, 0);
3811 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
3812 "Stop process PROCESS. May be process or name of one.\n\
3813 See function `interrupt-process' for more details on usage.")
3814 (process
, current_group
)
3815 Lisp_Object process
, current_group
;
3818 error ("no SIGTSTP support");
3820 process_send_signal (process
, SIGTSTP
, current_group
, 0);
3825 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
3826 "Continue process PROCESS. May be process or name of one.\n\
3827 See function `interrupt-process' for more details on usage.")
3828 (process
, current_group
)
3829 Lisp_Object process
, current_group
;
3832 process_send_signal (process
, SIGCONT
, current_group
, 0);
3834 error ("no SIGCONT support");
3839 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
3840 2, 2, "nProcess number: \nnSignal code: ",
3841 "Send the process with process id PID the signal with code SIGCODE.\n\
3842 PID must be an integer. The process need not be a child of this Emacs.\n\
3843 SIGCODE may be an integer, or a symbol whose name is a signal name.")
3845 Lisp_Object pid
, sigcode
;
3847 CHECK_NUMBER (pid
, 0);
3849 #define handle_signal(NAME, VALUE) \
3850 else if (!strcmp (name, NAME)) \
3851 XSETINT (sigcode, VALUE)
3853 if (INTEGERP (sigcode
))
3857 unsigned char *name
;
3859 CHECK_SYMBOL (sigcode
, 1);
3860 name
= XSYMBOL (sigcode
)->name
->data
;
3865 handle_signal ("SIGHUP", SIGHUP
);
3868 handle_signal ("SIGINT", SIGINT
);
3871 handle_signal ("SIGQUIT", SIGQUIT
);
3874 handle_signal ("SIGILL", SIGILL
);
3877 handle_signal ("SIGABRT", SIGABRT
);
3880 handle_signal ("SIGEMT", SIGEMT
);
3883 handle_signal ("SIGKILL", SIGKILL
);
3886 handle_signal ("SIGFPE", SIGFPE
);
3889 handle_signal ("SIGBUS", SIGBUS
);
3892 handle_signal ("SIGSEGV", SIGSEGV
);
3895 handle_signal ("SIGSYS", SIGSYS
);
3898 handle_signal ("SIGPIPE", SIGPIPE
);
3901 handle_signal ("SIGALRM", SIGALRM
);
3904 handle_signal ("SIGTERM", SIGTERM
);
3907 handle_signal ("SIGURG", SIGURG
);
3910 handle_signal ("SIGSTOP", SIGSTOP
);
3913 handle_signal ("SIGTSTP", SIGTSTP
);
3916 handle_signal ("SIGCONT", SIGCONT
);
3919 handle_signal ("SIGCHLD", SIGCHLD
);
3922 handle_signal ("SIGTTIN", SIGTTIN
);
3925 handle_signal ("SIGTTOU", SIGTTOU
);
3928 handle_signal ("SIGIO", SIGIO
);
3931 handle_signal ("SIGXCPU", SIGXCPU
);
3934 handle_signal ("SIGXFSZ", SIGXFSZ
);
3937 handle_signal ("SIGVTALRM", SIGVTALRM
);
3940 handle_signal ("SIGPROF", SIGPROF
);
3943 handle_signal ("SIGWINCH", SIGWINCH
);
3946 handle_signal ("SIGINFO", SIGINFO
);
3949 handle_signal ("SIGUSR1", SIGUSR1
);
3952 handle_signal ("SIGUSR2", SIGUSR2
);
3955 error ("Undefined signal name %s", name
);
3958 #undef handle_signal
3960 return make_number (kill (XINT (pid
), XINT (sigcode
)));
3963 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
3964 "Make PROCESS see end-of-file in its input.\n\
3965 EOF comes after any text already sent to it.\n\
3966 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3967 nil, indicating the current buffer's process.\n\
3968 If PROCESS is a network connection, or is a process communicating\n\
3969 through a pipe (as opposed to a pty), then you cannot send any more\n\
3970 text to PROCESS after you call this function.")
3972 Lisp_Object process
;
3975 struct coding_system
*coding
;
3977 proc
= get_process (process
);
3978 coding
= proc_encode_coding_system
[XINT (XPROCESS (proc
)->outfd
)];
3980 /* Make sure the process is really alive. */
3981 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3982 update_status (XPROCESS (proc
));
3983 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3984 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
3986 if (CODING_REQUIRE_FLUSHING (coding
))
3988 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
3989 send_process (proc
, "", 0, Qnil
);
3993 send_process (proc
, "\032", 1, Qnil
); /* ^z */
3995 if (!NILP (XPROCESS (proc
)->pty_flag
))
3996 send_process (proc
, "\004", 1, Qnil
);
3999 int old_outfd
, new_outfd
;
4001 #ifdef HAVE_SHUTDOWN
4002 /* If this is a network connection, or socketpair is used
4003 for communication with the subprocess, call shutdown to cause EOF.
4004 (In some old system, shutdown to socketpair doesn't work.
4005 Then we just can't win.) */
4006 if (NILP (XPROCESS (proc
)->pid
)
4007 || XINT (XPROCESS (proc
)->outfd
) == XINT (XPROCESS (proc
)->infd
))
4008 shutdown (XINT (XPROCESS (proc
)->outfd
), 1);
4009 /* In case of socketpair, outfd == infd, so don't close it. */
4010 if (XINT (XPROCESS (proc
)->outfd
) != XINT (XPROCESS (proc
)->infd
))
4011 emacs_close (XINT (XPROCESS (proc
)->outfd
));
4012 #else /* not HAVE_SHUTDOWN */
4013 emacs_close (XINT (XPROCESS (proc
)->outfd
));
4014 #endif /* not HAVE_SHUTDOWN */
4015 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
4016 old_outfd
= XINT (XPROCESS (proc
)->outfd
);
4018 if (!proc_encode_coding_system
[new_outfd
])
4019 proc_encode_coding_system
[new_outfd
]
4020 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
4021 bcopy (proc_encode_coding_system
[old_outfd
],
4022 proc_encode_coding_system
[new_outfd
],
4023 sizeof (struct coding_system
));
4024 bzero (proc_encode_coding_system
[old_outfd
],
4025 sizeof (struct coding_system
));
4027 XSETINT (XPROCESS (proc
)->outfd
, new_outfd
);
4033 /* Kill all processes associated with `buffer'.
4034 If `buffer' is nil, kill all processes */
4037 kill_buffer_processes (buffer
)
4040 Lisp_Object tail
, proc
;
4042 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
4044 proc
= XCDR (XCAR (tail
));
4045 if (GC_PROCESSP (proc
)
4046 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
4048 if (NETCONN_P (proc
))
4049 Fdelete_process (proc
);
4050 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
4051 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
4056 /* On receipt of a signal that a child status has changed,
4057 loop asking about children with changed statuses until
4058 the system says there are no more.
4059 All we do is change the status;
4060 we do not run sentinels or print notifications.
4061 That is saved for the next time keyboard input is done,
4062 in order to avoid timing errors. */
4064 /** WARNING: this can be called during garbage collection.
4065 Therefore, it must not be fooled by the presence of mark bits in
4068 /** USG WARNING: Although it is not obvious from the documentation
4069 in signal(2), on a USG system the SIGCLD handler MUST NOT call
4070 signal() before executing at least one wait(), otherwise the handler
4071 will be called again, resulting in an infinite loop. The relevant
4072 portion of the documentation reads "SIGCLD signals will be queued
4073 and the signal-catching function will be continually reentered until
4074 the queue is empty". Invoking signal() causes the kernel to reexamine
4075 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
4078 sigchld_handler (signo
)
4081 int old_errno
= errno
;
4083 register struct Lisp_Process
*p
;
4084 extern EMACS_TIME
*input_available_clear_time
;
4088 sigheld
|= sigbit (SIGCHLD
);
4100 #endif /* no WUNTRACED */
4101 /* Keep trying to get a status until we get a definitive result. */
4105 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
4107 while (pid
<= 0 && errno
== EINTR
);
4111 /* A real failure. We have done all our job, so return. */
4113 /* USG systems forget handlers when they are used;
4114 must reestablish each time */
4115 #if defined (USG) && !defined (POSIX_SIGNALS)
4116 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
4119 sigheld
&= ~sigbit (SIGCHLD
);
4127 #endif /* no WNOHANG */
4129 /* Find the process that signaled us, and record its status. */
4132 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
4134 proc
= XCDR (XCAR (tail
));
4135 p
= XPROCESS (proc
);
4136 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
4141 /* Look for an asynchronous process whose pid hasn't been filled
4144 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
4146 proc
= XCDR (XCAR (tail
));
4147 p
= XPROCESS (proc
);
4148 if (INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
4153 /* Change the status of the process that was found. */
4156 union { int i
; WAITTYPE wt
; } u
;
4157 int clear_desc_flag
= 0;
4159 XSETINT (p
->tick
, ++process_tick
);
4161 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
4162 XSETINT (p
->raw_status_high
, u
.i
>> 16);
4164 /* If process has terminated, stop waiting for its output. */
4165 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
4166 && XINT (p
->infd
) >= 0)
4167 clear_desc_flag
= 1;
4169 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
4170 if (clear_desc_flag
)
4172 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
4173 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
4176 /* Tell wait_reading_process_input that it needs to wake up and
4178 if (input_available_clear_time
)
4179 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
4182 /* There was no asynchronous process found for that id. Check
4183 if we have a synchronous process. */
4186 synch_process_alive
= 0;
4188 /* Report the status of the synchronous process. */
4190 synch_process_retcode
= WRETCODE (w
);
4191 else if (WIFSIGNALED (w
))
4193 int code
= WTERMSIG (w
);
4196 synchronize_system_messages_locale ();
4197 signame
= strsignal (code
);
4200 signame
= "unknown";
4202 synch_process_death
= signame
;
4205 /* Tell wait_reading_process_input that it needs to wake up and
4207 if (input_available_clear_time
)
4208 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
4211 /* On some systems, we must return right away.
4212 If any more processes want to signal us, we will
4214 Otherwise (on systems that have WNOHANG), loop around
4215 to use up all the processes that have something to tell us. */
4216 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT)
4217 #if defined (USG) && ! defined (POSIX_SIGNALS)
4218 signal (signo
, sigchld_handler
);
4222 #endif /* USG, but not HPUX with WNOHANG */
4228 exec_sentinel_unwind (data
)
4231 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
4236 exec_sentinel_error_handler (error
)
4239 cmd_error_internal (error
, "error in process sentinel: ");
4241 update_echo_area ();
4242 Fsleep_for (make_number (2), Qnil
);
4247 exec_sentinel (proc
, reason
)
4248 Lisp_Object proc
, reason
;
4250 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
4251 register struct Lisp_Process
*p
= XPROCESS (proc
);
4252 int count
= specpdl_ptr
- specpdl
;
4253 int outer_running_asynch_code
= running_asynch_code
;
4254 int waiting
= waiting_for_user_input_p
;
4256 /* No need to gcpro these, because all we do with them later
4257 is test them for EQness, and none of them should be a string. */
4258 odeactivate
= Vdeactivate_mark
;
4259 XSETBUFFER (obuffer
, current_buffer
);
4260 okeymap
= current_buffer
->keymap
;
4262 sentinel
= p
->sentinel
;
4263 if (NILP (sentinel
))
4266 /* Zilch the sentinel while it's running, to avoid recursive invocations;
4267 assure that it gets restored no matter how the sentinel exits. */
4269 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
4270 /* Inhibit quit so that random quits don't screw up a running filter. */
4271 specbind (Qinhibit_quit
, Qt
);
4272 specbind (Qlast_nonmenu_event
, Qt
);
4274 /* In case we get recursively called,
4275 and we already saved the match data nonrecursively,
4276 save the same match data in safely recursive fashion. */
4277 if (outer_running_asynch_code
)
4280 tem
= Fmatch_data (Qnil
, Qnil
);
4281 restore_match_data ();
4282 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
4283 Fset_match_data (tem
);
4286 /* For speed, if a search happens within this code,
4287 save the match data in a special nonrecursive fashion. */
4288 running_asynch_code
= 1;
4290 internal_condition_case_1 (read_process_output_call
,
4292 Fcons (proc
, Fcons (reason
, Qnil
))),
4293 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
4294 exec_sentinel_error_handler
);
4296 /* If we saved the match data nonrecursively, restore it now. */
4297 restore_match_data ();
4298 running_asynch_code
= outer_running_asynch_code
;
4300 Vdeactivate_mark
= odeactivate
;
4302 /* Restore waiting_for_user_input_p as it was
4303 when we were called, in case the filter clobbered it. */
4304 waiting_for_user_input_p
= waiting
;
4307 if (! EQ (Fcurrent_buffer (), obuffer
)
4308 || ! EQ (current_buffer
->keymap
, okeymap
))
4310 /* But do it only if the caller is actually going to read events.
4311 Otherwise there's no need to make him wake up, and it could
4312 cause trouble (for example it would make Fsit_for return). */
4313 if (waiting_for_user_input_p
== -1)
4314 record_asynch_buffer_change ();
4316 unbind_to (count
, Qnil
);
4319 /* Report all recent events of a change in process status
4320 (either run the sentinel or output a message).
4321 This is done while Emacs is waiting for keyboard input. */
4326 register Lisp_Object proc
, buffer
;
4327 Lisp_Object tail
, msg
;
4328 struct gcpro gcpro1
, gcpro2
;
4332 /* We need to gcpro tail; if read_process_output calls a filter
4333 which deletes a process and removes the cons to which tail points
4334 from Vprocess_alist, and then causes a GC, tail is an unprotected
4338 /* Set this now, so that if new processes are created by sentinels
4339 that we run, we get called again to handle their status changes. */
4340 update_tick
= process_tick
;
4342 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
4345 register struct Lisp_Process
*p
;
4347 proc
= Fcdr (Fcar (tail
));
4348 p
= XPROCESS (proc
);
4350 if (XINT (p
->tick
) != XINT (p
->update_tick
))
4352 XSETINT (p
->update_tick
, XINT (p
->tick
));
4354 /* If process is still active, read any output that remains. */
4355 while (! EQ (p
->filter
, Qt
)
4356 && XINT (p
->infd
) >= 0
4357 && read_process_output (proc
, XINT (p
->infd
)) > 0);
4361 /* Get the text to use for the message. */
4362 if (!NILP (p
->raw_status_low
))
4364 msg
= status_message (p
->status
);
4366 /* If process is terminated, deactivate it or delete it. */
4368 if (CONSP (p
->status
))
4369 symbol
= XCAR (p
->status
);
4371 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
4372 || EQ (symbol
, Qclosed
))
4374 if (delete_exited_processes
)
4375 remove_process (proc
);
4377 deactivate_process (proc
);
4380 /* The actions above may have further incremented p->tick.
4381 So set p->update_tick again
4382 so that an error in the sentinel will not cause
4383 this code to be run again. */
4384 XSETINT (p
->update_tick
, XINT (p
->tick
));
4385 /* Now output the message suitably. */
4386 if (!NILP (p
->sentinel
))
4387 exec_sentinel (proc
, msg
);
4388 /* Don't bother with a message in the buffer
4389 when a process becomes runnable. */
4390 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
4392 Lisp_Object ro
, tem
;
4393 struct buffer
*old
= current_buffer
;
4394 int opoint
, opoint_byte
;
4395 int before
, before_byte
;
4397 ro
= XBUFFER (buffer
)->read_only
;
4399 /* Avoid error if buffer is deleted
4400 (probably that's why the process is dead, too) */
4401 if (NILP (XBUFFER (buffer
)->name
))
4403 Fset_buffer (buffer
);
4406 opoint_byte
= PT_BYTE
;
4407 /* Insert new output into buffer
4408 at the current end-of-output marker,
4409 thus preserving logical ordering of input and output. */
4410 if (XMARKER (p
->mark
)->buffer
)
4411 Fgoto_char (p
->mark
);
4413 SET_PT_BOTH (ZV
, ZV_BYTE
);
4416 before_byte
= PT_BYTE
;
4418 tem
= current_buffer
->read_only
;
4419 current_buffer
->read_only
= Qnil
;
4420 insert_string ("\nProcess ");
4421 Finsert (1, &p
->name
);
4422 insert_string (" ");
4424 current_buffer
->read_only
= tem
;
4425 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
4427 if (opoint
>= before
)
4428 SET_PT_BOTH (opoint
+ (PT
- before
),
4429 opoint_byte
+ (PT_BYTE
- before_byte
));
4431 SET_PT_BOTH (opoint
, opoint_byte
);
4433 set_buffer_internal (old
);
4438 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
4439 redisplay_preserve_echo_area ();
4445 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
4446 Sset_process_coding_system
, 1, 3, 0,
4447 "Set coding systems of PROCESS to DECODING and ENCODING.\n\
4448 DECODING will be used to decode subprocess output and ENCODING to\n\
4449 encode subprocess input.")
4450 (proc
, decoding
, encoding
)
4451 register Lisp_Object proc
, decoding
, encoding
;
4453 register struct Lisp_Process
*p
;
4455 CHECK_PROCESS (proc
, 0);
4456 p
= XPROCESS (proc
);
4457 if (XINT (p
->infd
) < 0)
4458 error ("Input file descriptor of %s closed", XSTRING (p
->name
)->data
);
4459 if (XINT (p
->outfd
) < 0)
4460 error ("Output file descriptor of %s closed", XSTRING (p
->name
)->data
);
4462 p
->decode_coding_system
= Fcheck_coding_system (decoding
);
4463 p
->encode_coding_system
= Fcheck_coding_system (encoding
);
4464 setup_coding_system (decoding
,
4465 proc_decode_coding_system
[XINT (p
->infd
)]);
4466 setup_coding_system (encoding
,
4467 proc_encode_coding_system
[XINT (p
->outfd
)]);
4472 DEFUN ("process-coding-system",
4473 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
4474 "Return a cons of coding systems for decoding and encoding of PROCESS.")
4476 register Lisp_Object proc
;
4478 CHECK_PROCESS (proc
, 0);
4479 return Fcons (XPROCESS (proc
)->decode_coding_system
,
4480 XPROCESS (proc
)->encode_coding_system
);
4483 /* The first time this is called, assume keyboard input comes from DESC
4484 instead of from where we used to expect it.
4485 Subsequent calls mean assume input keyboard can come from DESC
4486 in addition to other places. */
4488 static int add_keyboard_wait_descriptor_called_flag
;
4491 add_keyboard_wait_descriptor (desc
)
4494 if (! add_keyboard_wait_descriptor_called_flag
)
4495 FD_CLR (0, &input_wait_mask
);
4496 add_keyboard_wait_descriptor_called_flag
= 1;
4497 FD_SET (desc
, &input_wait_mask
);
4498 FD_SET (desc
, &non_process_wait_mask
);
4499 if (desc
> max_keyboard_desc
)
4500 max_keyboard_desc
= desc
;
4503 /* From now on, do not expect DESC to give keyboard input. */
4506 delete_keyboard_wait_descriptor (desc
)
4510 int lim
= max_keyboard_desc
;
4512 FD_CLR (desc
, &input_wait_mask
);
4513 FD_CLR (desc
, &non_process_wait_mask
);
4515 if (desc
== max_keyboard_desc
)
4516 for (fd
= 0; fd
< lim
; fd
++)
4517 if (FD_ISSET (fd
, &input_wait_mask
)
4518 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
4519 max_keyboard_desc
= fd
;
4522 /* Return nonzero if *MASK has a bit set
4523 that corresponds to one of the keyboard input descriptors. */
4526 keyboard_bit_set (mask
)
4531 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
4532 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
4533 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
4546 if (! noninteractive
|| initialized
)
4548 signal (SIGCHLD
, sigchld_handler
);
4551 FD_ZERO (&input_wait_mask
);
4552 FD_ZERO (&non_keyboard_wait_mask
);
4553 FD_ZERO (&non_process_wait_mask
);
4554 max_process_desc
= 0;
4556 FD_SET (0, &input_wait_mask
);
4558 Vprocess_alist
= Qnil
;
4559 for (i
= 0; i
< MAXDESC
; i
++)
4561 chan_process
[i
] = Qnil
;
4562 proc_buffered_char
[i
] = -1;
4564 bzero (proc_decode_coding_system
, sizeof proc_decode_coding_system
);
4565 bzero (proc_encode_coding_system
, sizeof proc_encode_coding_system
);
4571 Qprocessp
= intern ("processp");
4572 staticpro (&Qprocessp
);
4573 Qrun
= intern ("run");
4575 Qstop
= intern ("stop");
4577 Qsignal
= intern ("signal");
4578 staticpro (&Qsignal
);
4580 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
4583 Qexit = intern ("exit");
4584 staticpro (&Qexit); */
4586 Qopen
= intern ("open");
4588 Qclosed
= intern ("closed");
4589 staticpro (&Qclosed
);
4591 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
4592 staticpro (&Qlast_nonmenu_event
);
4594 staticpro (&Vprocess_alist
);
4596 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
4597 "*Non-nil means delete processes immediately when they exit.\n\
4598 nil means don't delete them until `list-processes' is run.");
4600 delete_exited_processes
= 1;
4602 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
4603 "Control type of device used to communicate with subprocesses.\n\
4604 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
4605 The value has no effect if the system has no ptys or if all ptys are busy:\n\
4606 then a pipe is used in any case.\n\
4607 The value takes effect when `start-process' is called.");
4608 Vprocess_connection_type
= Qt
;
4610 defsubr (&Sprocessp
);
4611 defsubr (&Sget_process
);
4612 defsubr (&Sget_buffer_process
);
4613 defsubr (&Sdelete_process
);
4614 defsubr (&Sprocess_status
);
4615 defsubr (&Sprocess_exit_status
);
4616 defsubr (&Sprocess_id
);
4617 defsubr (&Sprocess_name
);
4618 defsubr (&Sprocess_tty_name
);
4619 defsubr (&Sprocess_command
);
4620 defsubr (&Sset_process_buffer
);
4621 defsubr (&Sprocess_buffer
);
4622 defsubr (&Sprocess_mark
);
4623 defsubr (&Sset_process_filter
);
4624 defsubr (&Sprocess_filter
);
4625 defsubr (&Sset_process_sentinel
);
4626 defsubr (&Sprocess_sentinel
);
4627 defsubr (&Sset_process_window_size
);
4628 defsubr (&Sset_process_inherit_coding_system_flag
);
4629 defsubr (&Sprocess_inherit_coding_system_flag
);
4630 defsubr (&Sprocess_kill_without_query
);
4631 defsubr (&Sprocess_contact
);
4632 defsubr (&Slist_processes
);
4633 defsubr (&Sprocess_list
);
4634 defsubr (&Sstart_process
);
4636 defsubr (&Sopen_network_stream
);
4637 #endif /* HAVE_SOCKETS */
4638 defsubr (&Saccept_process_output
);
4639 defsubr (&Sprocess_send_region
);
4640 defsubr (&Sprocess_send_string
);
4641 defsubr (&Sinterrupt_process
);
4642 defsubr (&Skill_process
);
4643 defsubr (&Squit_process
);
4644 defsubr (&Sstop_process
);
4645 defsubr (&Scontinue_process
);
4646 defsubr (&Sprocess_running_child_p
);
4647 defsubr (&Sprocess_send_eof
);
4648 defsubr (&Ssignal_process
);
4649 defsubr (&Swaiting_for_user_input_p
);
4650 /* defsubr (&Sprocess_connection); */
4651 defsubr (&Sset_process_coding_system
);
4652 defsubr (&Sprocess_coding_system
);
4656 #else /* not subprocesses */
4658 #include <sys/types.h>
4662 #include "systime.h"
4663 #include "charset.h"
4665 #include "termopts.h"
4666 #include "sysselect.h"
4668 extern int frame_garbaged
;
4670 extern EMACS_TIME
timer_check ();
4671 extern int timers_run
;
4673 /* As described above, except assuming that there are no subprocesses:
4675 Wait for timeout to elapse and/or keyboard input to be available.
4678 timeout in seconds, or
4679 zero for no limit, or
4680 -1 means gobble data immediately available but don't wait for any.
4682 read_kbd is a Lisp_Object:
4683 0 to ignore keyboard input, or
4684 1 to return when input is available, or
4685 -1 means caller will actually read the input, so don't throw to
4687 a cons cell, meaning wait until its car is non-nil
4688 (and gobble terminal input into the buffer if any arrives), or
4689 We know that read_kbd will never be a Lisp_Process, since
4690 `subprocesses' isn't defined.
4692 do_display != 0 means redisplay should be done to show subprocess
4693 output that arrives.
4695 Return true iff we received input from any process. */
4698 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
4699 int time_limit
, microsecs
;
4700 Lisp_Object read_kbd
;
4704 EMACS_TIME end_time
, timeout
;
4705 SELECT_TYPE waitchannels
;
4707 Lisp_Object
*wait_for_cell
= 0;
4709 /* If waiting for non-nil in a cell, record where. */
4710 if (CONSP (read_kbd
))
4712 wait_for_cell
= &XCAR (read_kbd
);
4713 XSETFASTINT (read_kbd
, 0);
4716 /* What does time_limit really mean? */
4717 if (time_limit
|| microsecs
)
4719 EMACS_GET_TIME (end_time
);
4720 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4721 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4724 /* Turn off periodic alarms (in case they are in use)
4725 because the select emulator uses alarms. */
4726 turn_on_atimers (0);
4730 int timeout_reduced_for_timers
= 0;
4732 /* If calling from keyboard input, do not quit
4733 since we want to return C-g as an input character.
4734 Otherwise, do pending quit if requested. */
4735 if (XINT (read_kbd
) >= 0)
4738 /* Exit now if the cell we're waiting for became non-nil. */
4739 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
4742 /* Compute time from now till when time limit is up */
4743 /* Exit if already run out */
4744 if (time_limit
== -1)
4746 /* -1 specified for timeout means
4747 gobble output available now
4748 but don't wait at all. */
4750 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4752 else if (time_limit
|| microsecs
)
4754 EMACS_GET_TIME (timeout
);
4755 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4756 if (EMACS_TIME_NEG_P (timeout
))
4761 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4764 /* If our caller will not immediately handle keyboard events,
4765 run timer events directly.
4766 (Callers that will immediately read keyboard events
4767 call timer_delay on their own.) */
4768 if (! wait_for_cell
)
4770 EMACS_TIME timer_delay
;
4774 old_timers_run
= timers_run
;
4775 timer_delay
= timer_check (1);
4776 if (timers_run
!= old_timers_run
&& do_display
)
4778 redisplay_preserve_echo_area ();
4779 /* We must retry, since a timer may have requeued itself
4780 and that could alter the time delay. */
4784 /* If there is unread keyboard input, also return. */
4785 if (XINT (read_kbd
) != 0
4786 && requeued_events_pending_p ())
4789 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4791 EMACS_TIME difference
;
4792 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4793 if (EMACS_TIME_NEG_P (difference
))
4795 timeout
= timer_delay
;
4796 timeout_reduced_for_timers
= 1;
4801 /* Cause C-g and alarm signals to take immediate action,
4802 and cause input available signals to zero out timeout. */
4803 if (XINT (read_kbd
) < 0)
4804 set_waiting_for_input (&timeout
);
4806 /* Wait till there is something to do. */
4808 if (! XINT (read_kbd
) && wait_for_cell
== 0)
4809 FD_ZERO (&waitchannels
);
4811 FD_SET (0, &waitchannels
);
4813 /* If a frame has been newly mapped and needs updating,
4814 reprocess its display stuff. */
4815 if (frame_garbaged
&& do_display
)
4817 clear_waiting_for_input ();
4818 redisplay_preserve_echo_area ();
4819 if (XINT (read_kbd
) < 0)
4820 set_waiting_for_input (&timeout
);
4823 if (XINT (read_kbd
) && detect_input_pending ())
4826 FD_ZERO (&waitchannels
);
4829 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
4834 /* Make C-g and alarm signals set flags again */
4835 clear_waiting_for_input ();
4837 /* If we woke up due to SIGWINCH, actually change size now. */
4838 do_pending_window_change (0);
4840 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4841 /* We waited the full specified time, so return now. */
4846 /* If the system call was interrupted, then go around the
4848 if (xerrno
== EINTR
)
4849 FD_ZERO (&waitchannels
);
4851 error ("select error: %s", emacs_strerror (xerrno
));
4854 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
4855 /* System sometimes fails to deliver SIGIO. */
4856 kill (getpid (), SIGIO
);
4859 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
4860 kill (getpid (), SIGIO
);
4863 /* Check for keyboard input */
4865 if ((XINT (read_kbd
) != 0)
4866 && detect_input_pending_run_timers (do_display
))
4868 swallow_events (do_display
);
4869 if (detect_input_pending_run_timers (do_display
))
4873 /* If there is unread keyboard input, also return. */
4874 if (XINT (read_kbd
) != 0
4875 && requeued_events_pending_p ())
4878 /* If wait_for_cell. check for keyboard input
4879 but don't run any timers.
4880 ??? (It seems wrong to me to check for keyboard
4881 input at all when wait_for_cell, but the code
4882 has been this way since July 1994.
4883 Try changing this after version 19.31.) */
4885 && detect_input_pending ())
4887 swallow_events (do_display
);
4888 if (detect_input_pending ())
4892 /* Exit now if the cell we're waiting for became non-nil. */
4893 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
4903 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
4904 /* Don't confuse make-docfile by having two doc strings for this function.
4905 make-docfile does not pay attention to #if, for good reason! */
4908 register Lisp_Object name
;
4913 DEFUN ("process-inherit-coding-system-flag",
4914 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
4916 /* Don't confuse make-docfile by having two doc strings for this function.
4917 make-docfile does not pay attention to #if, for good reason! */
4920 register Lisp_Object process
;
4922 /* Ignore the argument and return the value of
4923 inherit-process-coding-system. */
4924 return inherit_process_coding_system
? Qt
: Qnil
;
4927 /* Kill all processes associated with `buffer'.
4928 If `buffer' is nil, kill all processes.
4929 Since we have no subprocesses, this does nothing. */
4932 kill_buffer_processes (buffer
)
4945 defsubr (&Sget_buffer_process
);
4946 defsubr (&Sprocess_inherit_coding_system_flag
);
4950 #endif /* not subprocesses */