1 /* Asynchronous subprocess control for GNU Emacs.
2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 96, 1998
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
27 /* This file is split into two parts by the following preprocessor
28 conditional. The 'then' clause contains all of the support for
29 asynchronous subprocesses. The 'else' clause contains stub
30 versions of some of the asynchronous subprocess routines that are
31 often called elsewhere in Emacs, so we don't have to #ifdef the
32 sections that call them. */
40 #include <sys/types.h> /* some typedefs are used in sys/file.h */
50 #endif /* not WINDOWSNT */
52 #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */
53 #include <sys/socket.h>
55 #include <netinet/in.h>
56 #include <arpa/inet.h>
57 #ifdef NEED_NET_ERRNO_H
58 #include <net/errno.h>
59 #endif /* NEED_NET_ERRNO_H */
60 #endif /* HAVE_SOCKETS */
62 /* TERM is a poor-man's SLIP, used on Linux. */
67 /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */
68 #ifdef HAVE_BROKEN_INET_ADDR
69 #define IN_ADDR struct in_addr
70 #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1)
72 #define IN_ADDR unsigned long
73 #define NUMERIC_ADDR_ERROR (numeric_addr == -1)
76 #if defined(BSD_SYSTEM) || defined(STRIDE)
77 #include <sys/ioctl.h>
78 #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5)
80 #endif /* HAVE_PTYS and no O_NDELAY */
81 #endif /* BSD_SYSTEM || STRIDE */
83 #ifdef BROKEN_O_NONBLOCK
85 #endif /* BROKEN_O_NONBLOCK */
92 #include <sys/sysmacros.h> /* for "minor" */
104 #include "termhooks.h"
105 #include "termopts.h"
106 #include "commands.h"
108 #include "blockinput.h"
109 #include "keyboard.h"
110 #include "dispextern.h"
112 #define max(a, b) ((a) > (b) ? (a) : (b))
114 Lisp_Object Qprocessp
;
115 Lisp_Object Qrun
, Qstop
, Qsignal
, Qopen
, Qclosed
;
116 Lisp_Object Qlast_nonmenu_event
;
117 /* Qexit is declared and initialized in eval.c. */
119 /* a process object is a network connection when its childp field is neither
120 Qt nor Qnil but is instead a cons cell (HOSTNAME PORTNUM). */
123 #define NETCONN_P(p) (GC_CONSP (XPROCESS (p)->childp))
125 #define NETCONN_P(p) 0
126 #endif /* HAVE_SOCKETS */
128 /* Define first descriptor number available for subprocesses. */
130 #define FIRST_PROC_DESC 1
132 #define FIRST_PROC_DESC 3
135 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
138 #if !defined (SIGCHLD) && defined (SIGCLD)
139 #define SIGCHLD SIGCLD
142 #include "syssignal.h"
147 extern char *strerror ();
149 extern char *sys_errlist
[];
156 #ifndef SYS_SIGLIST_DECLARED
161 extern char *sys_siglist
[];
162 #endif /* not LINUX */
164 char *sys_siglist
[] =
170 "illegal instruction",
174 "floating point exception",
177 "segmentation violation",
178 "bad argument to system call",
179 "write on a pipe with no one to read it",
181 "software termination signal from kill",
183 "sendable stop signal not from tty",
184 "stop signal from tty",
185 "continue a stopped process",
186 "child status has changed",
187 "background read attempted from control tty",
188 "background write attempted from control tty",
189 "input record available at control tty",
190 "exceeded CPU time limit",
191 "exceeded file size limit"
193 #endif /* not WINDOWSNT */
196 #endif /* ! SYS_SIGLIST_DECLARED */
198 /* t means use pty, nil means use a pipe,
199 maybe other values to come. */
200 static Lisp_Object Vprocess_connection_type
;
204 #include <sys/socket.h>
208 /* These next two vars are non-static since sysdep.c uses them in the
209 emulation of `select'. */
210 /* Number of events of change of status of a process. */
212 /* Number of events for which the user or sentinel has been notified. */
215 #include "sysselect.h"
217 /* If we support a window system, turn on the code to poll periodically
218 to detect C-g. It isn't actually used when doing interrupt input. */
219 #ifdef HAVE_WINDOW_SYSTEM
220 #define POLL_FOR_INPUT
223 /* Mask of bits indicating the descriptors that we wait for input on. */
225 static SELECT_TYPE input_wait_mask
;
227 /* Mask that excludes keyboard input descriptor (s). */
229 static SELECT_TYPE non_keyboard_wait_mask
;
231 /* Mask that excludes process input descriptor (s). */
233 static SELECT_TYPE non_process_wait_mask
;
235 /* The largest descriptor currently in use for a process object. */
236 static int max_process_desc
;
238 /* The largest descriptor currently in use for keyboard input. */
239 static int max_keyboard_desc
;
241 /* Nonzero means delete a process right away if it exits. */
242 static int delete_exited_processes
;
244 /* Indexed by descriptor, gives the process (if any) for that descriptor */
245 Lisp_Object chan_process
[MAXDESC
];
247 /* Alist of elements (NAME . PROCESS) */
248 Lisp_Object Vprocess_alist
;
250 /* Buffered-ahead input char from process, indexed by channel.
251 -1 means empty (no char is buffered).
252 Used on sys V where the only way to tell if there is any
253 output from the process is to read at least one char.
254 Always -1 on systems that support FIONREAD. */
256 /* Don't make static; need to access externally. */
257 int proc_buffered_char
[MAXDESC
];
259 /* Table of `struct coding-system' for each process. */
260 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
261 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
263 static Lisp_Object
get_process ();
265 extern EMACS_TIME
timer_check ();
266 extern int timers_run
;
268 /* Maximum number of bytes to send to a pty without an eof. */
269 static int pty_max_bytes
;
271 extern Lisp_Object Vfile_name_coding_system
, Vdefault_file_name_coding_system
;
274 /* The file name of the pty opened by allocate_pty. */
276 static char pty_name
[24];
279 /* Compute the Lisp form of the process status, p->status, from
280 the numeric status that was returned by `wait'. */
282 Lisp_Object
status_convert ();
286 struct Lisp_Process
*p
;
288 union { int i
; WAITTYPE wt
; } u
;
289 u
.i
= XFASTINT (p
->raw_status_low
) + (XFASTINT (p
->raw_status_high
) << 16);
290 p
->status
= status_convert (u
.wt
);
291 p
->raw_status_low
= Qnil
;
292 p
->raw_status_high
= Qnil
;
295 /* Convert a process status word in Unix format to
296 the list that we use internally. */
303 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
304 else if (WIFEXITED (w
))
305 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
306 WCOREDUMP (w
) ? Qt
: Qnil
));
307 else if (WIFSIGNALED (w
))
308 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
309 WCOREDUMP (w
) ? Qt
: Qnil
));
314 /* Given a status-list, extract the three pieces of information
315 and store them individually through the three pointers. */
318 decode_status (l
, symbol
, code
, coredump
)
334 *symbol
= XCONS (l
)->car
;
335 tem
= XCONS (l
)->cdr
;
336 *code
= XFASTINT (XCONS (tem
)->car
);
337 tem
= XCONS (tem
)->cdr
;
338 *coredump
= !NILP (tem
);
342 /* Return a string describing a process status list. */
345 status_message (status
)
350 Lisp_Object string
, string2
;
352 decode_status (status
, &symbol
, &code
, &coredump
);
354 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
360 /* Cast to suppress warning if the table has const char *. */
361 signame
= (char *) sys_siglist
[code
];
363 signame
= sys_errlist
[code
];
368 string
= build_string (signame
);
369 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
370 XSTRING (string
)->data
[0] = DOWNCASE (XSTRING (string
)->data
[0]);
371 return concat2 (string
, string2
);
373 else if (EQ (symbol
, Qexit
))
376 return build_string ("finished\n");
377 string
= Fnumber_to_string (make_number (code
));
378 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
379 return concat2 (build_string ("exited abnormally with code "),
380 concat2 (string
, string2
));
383 return Fcopy_sequence (Fsymbol_name (symbol
));
388 /* Open an available pty, returning a file descriptor.
389 Return -1 on failure.
390 The file name of the terminal corresponding to the pty
391 is left in the variable pty_name. */
400 /* Some systems name their pseudoterminals so that there are gaps in
401 the usual sequence - for example, on HP9000/S700 systems, there
402 are no pseudoterminals with names ending in 'f'. So we wait for
403 three failures in a row before deciding that we've reached the
405 int failed_count
= 0;
410 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
411 for (i
= 0; i
< 16; i
++)
414 #ifdef PTY_NAME_SPRINTF
417 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
418 #endif /* no PTY_NAME_SPRINTF */
422 #else /* no PTY_OPEN */
424 /* Unusual IRIS code */
425 *ptyv
= open ("/dev/ptc", O_RDWR
| O_NDELAY
, 0);
428 if (fstat (fd
, &stb
) < 0)
431 if (stat (pty_name
, &stb
) < 0)
434 if (failed_count
>= 3)
440 fd
= open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
442 fd
= open (pty_name
, O_RDWR
| O_NDELAY
, 0);
444 #endif /* not IRIS */
445 #endif /* no PTY_OPEN */
449 /* check to make certain that both sides are available
450 this avoids a nasty yet stupid bug in rlogins */
451 #ifdef PTY_TTY_NAME_SPRINTF
454 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
455 #endif /* no PTY_TTY_NAME_SPRINTF */
457 if (access (pty_name
, 6) != 0)
460 #if !defined(IRIS) && !defined(__sgi)
466 #endif /* not UNIPLUS */
473 #endif /* HAVE_PTYS */
479 struct Lisp_Vector
*vec
;
480 register Lisp_Object val
, tem
, name1
;
481 register struct Lisp_Process
*p
;
485 vec
= allocate_vectorlike ((EMACS_INT
) VECSIZE (struct Lisp_Process
));
486 for (i
= 0; i
< VECSIZE (struct Lisp_Process
); i
++)
487 vec
->contents
[i
] = Qnil
;
488 vec
->size
= VECSIZE (struct Lisp_Process
);
489 p
= (struct Lisp_Process
*)vec
;
491 XSETINT (p
->infd
, -1);
492 XSETINT (p
->outfd
, -1);
493 XSETFASTINT (p
->pid
, 0);
494 XSETFASTINT (p
->tick
, 0);
495 XSETFASTINT (p
->update_tick
, 0);
496 p
->raw_status_low
= Qnil
;
497 p
->raw_status_high
= Qnil
;
499 p
->mark
= Fmake_marker ();
501 /* If name is already in use, modify it until it is unused. */
506 tem
= Fget_process (name1
);
507 if (NILP (tem
)) break;
508 sprintf (suffix
, "<%d>", i
);
509 name1
= concat2 (name
, build_string (suffix
));
513 XSETPROCESS (val
, p
);
514 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
519 remove_process (proc
)
520 register Lisp_Object proc
;
522 register Lisp_Object pair
;
524 pair
= Frassq (proc
, Vprocess_alist
);
525 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
527 deactivate_process (proc
);
530 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
531 "Return t if OBJECT is a process.")
535 return PROCESSP (object
) ? Qt
: Qnil
;
538 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
539 "Return the process named NAME, or nil if there is none.")
541 register Lisp_Object name
;
545 CHECK_STRING (name
, 0);
546 return Fcdr (Fassoc (name
, Vprocess_alist
));
549 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
550 "Return the (or, a) process associated with BUFFER.\n\
551 BUFFER may be a buffer or the name of one.")
553 register Lisp_Object buffer
;
555 register Lisp_Object buf
, tail
, proc
;
557 if (NILP (buffer
)) return Qnil
;
558 buf
= Fget_buffer (buffer
);
559 if (NILP (buf
)) return Qnil
;
561 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
563 proc
= Fcdr (Fcar (tail
));
564 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
570 /* This is how commands for the user decode process arguments. It
571 accepts a process, a process name, a buffer, a buffer name, or nil.
572 Buffers denote the first process in the buffer, and nil denotes the
577 register Lisp_Object name
;
579 register Lisp_Object proc
, obj
;
582 obj
= Fget_process (name
);
584 obj
= Fget_buffer (name
);
586 error ("Process %s does not exist", XSTRING (name
)->data
);
588 else if (NILP (name
))
589 obj
= Fcurrent_buffer ();
593 /* Now obj should be either a buffer object or a process object.
597 proc
= Fget_buffer_process (obj
);
599 error ("Buffer %s has no process", XSTRING (XBUFFER (obj
)->name
)->data
);
603 CHECK_PROCESS (obj
, 0);
609 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
610 "Delete PROCESS: kill it and forget about it immediately.\n\
611 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
612 nil, indicating the current buffer's process.")
614 register Lisp_Object process
;
616 process
= get_process (process
);
617 XPROCESS (process
)->raw_status_low
= Qnil
;
618 XPROCESS (process
)->raw_status_high
= Qnil
;
619 if (NETCONN_P (process
))
621 XPROCESS (process
)->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
622 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
624 else if (XINT (XPROCESS (process
)->infd
) >= 0)
626 Fkill_process (process
, Qnil
);
627 /* Do this now, since remove_process will make sigchld_handler do nothing. */
628 XPROCESS (process
)->status
629 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
630 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
633 remove_process (process
);
637 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
638 "Return the status of PROCESS: a symbol, one of these:\n\
639 run -- for a process that is running.\n\
640 stop -- for a process stopped but continuable.\n\
641 exit -- for a process that has exited.\n\
642 signal -- for a process that has got a fatal signal.\n\
643 open -- for a network stream connection that is open.\n\
644 closed -- for a network stream connection that is closed.\n\
645 nil -- if arg is a process name and no such process exists.\n\
646 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
647 nil, indicating the current buffer's process.")
649 register Lisp_Object process
;
651 register struct Lisp_Process
*p
;
652 register Lisp_Object status
;
654 if (STRINGP (process
))
655 process
= Fget_process (process
);
657 process
= get_process (process
);
662 p
= XPROCESS (process
);
663 if (!NILP (p
->raw_status_low
))
667 status
= XCONS (status
)->car
;
668 if (NETCONN_P (process
))
670 if (EQ (status
, Qrun
))
672 else if (EQ (status
, Qexit
))
678 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
680 "Return the exit status of PROCESS or the signal number that killed it.\n\
681 If PROCESS has not yet exited or died, return 0.")
683 register Lisp_Object process
;
685 CHECK_PROCESS (process
, 0);
686 if (!NILP (XPROCESS (process
)->raw_status_low
))
687 update_status (XPROCESS (process
));
688 if (CONSP (XPROCESS (process
)->status
))
689 return XCONS (XCONS (XPROCESS (process
)->status
)->cdr
)->car
;
690 return make_number (0);
693 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
694 "Return the process id of PROCESS.\n\
695 This is the pid of the Unix process which PROCESS uses or talks to.\n\
696 For a network connection, this value is nil.")
698 register Lisp_Object process
;
700 CHECK_PROCESS (process
, 0);
701 return XPROCESS (process
)->pid
;
704 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
705 "Return the name of PROCESS, as a string.\n\
706 This is the name of the program invoked in PROCESS,\n\
707 possibly modified to make it unique among process names.")
709 register Lisp_Object process
;
711 CHECK_PROCESS (process
, 0);
712 return XPROCESS (process
)->name
;
715 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
716 "Return the command that was executed to start PROCESS.\n\
717 This is a list of strings, the first string being the program executed\n\
718 and the rest of the strings being the arguments given to it.\n\
719 For a non-child channel, this is nil.")
721 register Lisp_Object process
;
723 CHECK_PROCESS (process
, 0);
724 return XPROCESS (process
)->command
;
727 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
728 "Return the name of the terminal PROCESS uses, or nil if none.\n\
729 This is the terminal that the process itself reads and writes on,\n\
730 not the name of the pty that Emacs uses to talk with that terminal.")
732 register Lisp_Object process
;
734 CHECK_PROCESS (process
, 0);
735 return XPROCESS (process
)->tty_name
;
738 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
740 "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).")
742 register Lisp_Object process
, buffer
;
744 CHECK_PROCESS (process
, 0);
746 CHECK_BUFFER (buffer
, 1);
747 XPROCESS (process
)->buffer
= buffer
;
751 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
753 "Return the buffer PROCESS is associated with.\n\
754 Output from PROCESS is inserted in this buffer\n\
755 unless PROCESS has a filter.")
757 register Lisp_Object process
;
759 CHECK_PROCESS (process
, 0);
760 return XPROCESS (process
)->buffer
;
763 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
765 "Return the marker for the end of the last output from PROCESS.")
767 register Lisp_Object process
;
769 CHECK_PROCESS (process
, 0);
770 return XPROCESS (process
)->mark
;
773 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
775 "Give PROCESS the filter function FILTER; nil means no filter.\n\
776 t means stop accepting output from the process.\n\
777 When a process has a filter, each time it does output\n\
778 the entire string of output is passed to the filter.\n\
779 The filter gets two arguments: the process and the string of output.\n\
780 If the process has a filter, its buffer is not used for output.")
782 register Lisp_Object process
, filter
;
784 CHECK_PROCESS (process
, 0);
787 FD_CLR (XINT (XPROCESS (process
)->infd
), &input_wait_mask
);
788 FD_CLR (XINT (XPROCESS (process
)->infd
), &non_keyboard_wait_mask
);
790 else if (EQ (XPROCESS (process
)->filter
, Qt
))
792 FD_SET (XINT (XPROCESS (process
)->infd
), &input_wait_mask
);
793 FD_SET (XINT (XPROCESS (process
)->infd
), &non_keyboard_wait_mask
);
795 XPROCESS (process
)->filter
= filter
;
799 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
801 "Returns the filter function of PROCESS; nil if none.\n\
802 See `set-process-filter' for more info on filter functions.")
804 register Lisp_Object process
;
806 CHECK_PROCESS (process
, 0);
807 return XPROCESS (process
)->filter
;
810 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
812 "Give PROCESS the sentinel SENTINEL; nil for none.\n\
813 The sentinel is called as a function when the process changes state.\n\
814 It gets two arguments: the process, and a string describing the change.")
816 register Lisp_Object process
, sentinel
;
818 CHECK_PROCESS (process
, 0);
819 XPROCESS (process
)->sentinel
= sentinel
;
823 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
825 "Return the sentinel of PROCESS; nil if none.\n\
826 See `set-process-sentinel' for more info on sentinels.")
828 register Lisp_Object process
;
830 CHECK_PROCESS (process
, 0);
831 return XPROCESS (process
)->sentinel
;
834 DEFUN ("set-process-window-size", Fset_process_window_size
,
835 Sset_process_window_size
, 3, 3, 0,
836 "Tell PROCESS that it has logical window size HEIGHT and WIDTH.")
837 (process
, height
, width
)
838 register Lisp_Object process
, height
, width
;
840 CHECK_PROCESS (process
, 0);
841 CHECK_NATNUM (height
, 0);
842 CHECK_NATNUM (width
, 0);
843 if (set_window_size (XINT (XPROCESS (process
)->infd
),
844 XINT (height
), XINT(width
)) <= 0)
850 DEFUN ("set-process-inherit-coding-system-flag",
851 Fset_process_inherit_coding_system_flag
,
852 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
853 "Determine whether buffer of PROCESS will inherit coding-system.\n\
854 If the second argument FLAG is non-nil, then the variable\n\
855 `buffer-file-coding-system' of the buffer associated with PROCESS\n\
856 will be bound to the value of the coding system used to decode\n\
857 the process output.\n\
859 This is useful when the coding system specified for the process buffer\n\
860 leaves either the character code conversion or the end-of-line conversion\n\
861 unspecified, or if the coding system used to decode the process output\n\
862 is more appropriate for saving the process buffer.\n\
864 Binding the variable `inherit-process-coding-system' to non-nil before\n\
865 starting the process is an alternative way of setting the inherit flag\n\
866 for the process which will run.")
868 register Lisp_Object process
, flag
;
870 CHECK_PROCESS (process
, 0);
871 XPROCESS (process
)->inherit_coding_system_flag
= flag
;
875 DEFUN ("process-inherit-coding-system-flag",
876 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
878 "Return the value of inherit-coding-system flag for PROCESS.\n\
879 If this flag is t, `buffer-file-coding-system' of the buffer\n\
880 associated with PROCESS will inherit the coding system used to decode\n\
881 the process output.")
883 register Lisp_Object process
;
885 CHECK_PROCESS (process
, 0);
886 return XPROCESS (process
)->inherit_coding_system_flag
;
889 DEFUN ("process-kill-without-query", Fprocess_kill_without_query
,
890 Sprocess_kill_without_query
, 1, 2, 0,
891 "Say no query needed if PROCESS is running when Emacs is exited.\n\
892 Optional second argument if non-nil says to require a query.\n\
893 Value is t if a query was formerly required.")
895 register Lisp_Object process
, value
;
899 CHECK_PROCESS (process
, 0);
900 tem
= XPROCESS (process
)->kill_without_query
;
901 XPROCESS (process
)->kill_without_query
= Fnull (value
);
906 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
908 "Return the contact info of PROCESS; t for a real child.\n\
909 For a net connection, the value is a cons cell of the form (HOST SERVICE).")
911 register Lisp_Object process
;
913 CHECK_PROCESS (process
, 0);
914 return XPROCESS (process
)->childp
;
917 #if 0 /* Turned off because we don't currently record this info
918 in the process. Perhaps add it. */
919 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
920 "Return the connection type of `PROCESS'.\n\
921 The value is `nil' for a pipe,\n\
922 `t' or `pty' for a pty, or `stream' for a socket connection.")
926 return XPROCESS (process
)->type
;
933 register Lisp_Object tail
, tem
;
934 Lisp_Object proc
, minspace
, tem1
;
935 register struct buffer
*old
= current_buffer
;
936 register struct Lisp_Process
*p
;
940 XSETFASTINT (minspace
, 1);
942 set_buffer_internal (XBUFFER (Vstandard_output
));
943 Fbuffer_disable_undo (Vstandard_output
);
945 current_buffer
->truncate_lines
= Qt
;
948 Proc Status Buffer Tty Command\n\
949 ---- ------ ------ --- -------\n", -1);
951 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
955 proc
= Fcdr (Fcar (tail
));
957 if (NILP (p
->childp
))
960 Finsert (1, &p
->name
);
961 Findent_to (make_number (13), minspace
);
963 if (!NILP (p
->raw_status_low
))
966 if (CONSP (p
->status
))
967 symbol
= XCONS (p
->status
)->car
;
970 if (EQ (symbol
, Qsignal
))
973 tem
= Fcar (Fcdr (p
->status
));
975 if (XINT (tem
) < NSIG
)
976 write_string (sys_errlist
[XINT (tem
)], -1);
979 Fprinc (symbol
, Qnil
);
981 else if (NETCONN_P (proc
))
983 if (EQ (symbol
, Qrun
))
984 write_string ("open", -1);
985 else if (EQ (symbol
, Qexit
))
986 write_string ("closed", -1);
988 Fprinc (symbol
, Qnil
);
991 Fprinc (symbol
, Qnil
);
993 if (EQ (symbol
, Qexit
))
996 tem
= Fcar (Fcdr (p
->status
));
999 sprintf (tembuf
, " %d", (int) XFASTINT (tem
));
1000 write_string (tembuf
, -1);
1004 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
1005 remove_process (proc
);
1007 Findent_to (make_number (22), minspace
);
1008 if (NILP (p
->buffer
))
1009 insert_string ("(none)");
1010 else if (NILP (XBUFFER (p
->buffer
)->name
))
1011 insert_string ("(Killed)");
1013 Finsert (1, &XBUFFER (p
->buffer
)->name
);
1015 Findent_to (make_number (37), minspace
);
1017 if (STRINGP (p
->tty_name
))
1018 Finsert (1, &p
->tty_name
);
1020 insert_string ("(none)");
1022 Findent_to (make_number (49), minspace
);
1024 if (NETCONN_P (proc
))
1026 sprintf (tembuf
, "(network stream connection to %s)\n",
1027 XSTRING (XCONS (p
->childp
)->car
)->data
);
1028 insert_string (tembuf
);
1040 insert_string (" ");
1042 insert_string ("\n");
1048 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 0, "",
1049 "Display a list of all processes.\n\
1050 \(Any processes listed as Exited or Signaled are actually eliminated\n\
1051 after the listing is made.)")
1054 internal_with_output_to_temp_buffer ("*Process List*",
1055 list_processes_1
, Qnil
);
1059 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1060 "Return a list of all processes.")
1063 return Fmapcar (Qcdr
, Vprocess_alist
);
1066 /* Starting asynchronous inferior processes. */
1068 static Lisp_Object
start_process_unwind ();
1070 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1071 "Start a program in a subprocess. Return the process object for it.\n\
1072 Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\
1073 NAME is name for process. It is modified if necessary to make it unique.\n\
1074 BUFFER is the buffer or (buffer-name) to associate with the process.\n\
1075 Process output goes at end of that buffer, unless you specify\n\
1076 an output stream or filter function to handle the output.\n\
1077 BUFFER may be also nil, meaning that this process is not associated\n\
1079 Third arg is program file name. It is searched for in PATH.\n\
1080 Remaining arguments are strings to give program as arguments.")
1083 register Lisp_Object
*args
;
1085 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1087 register unsigned char *new_argv
;
1090 register unsigned char **new_argv
;
1093 int count
= specpdl_ptr
- specpdl
;
1097 buffer
= Fget_buffer_create (buffer
);
1099 /* Make sure that the child will be able to chdir to the current
1100 buffer's current directory, or its unhandled equivalent. We
1101 can't just have the child check for an error when it does the
1102 chdir, since it's in a vfork.
1104 We have to GCPRO around this because Fexpand_file_name and
1105 Funhandled_file_name_directory might call a file name handling
1106 function. The argument list is protected by the caller, so all
1107 we really have to worry about is buffer. */
1109 struct gcpro gcpro1
, gcpro2
;
1111 current_dir
= current_buffer
->directory
;
1113 GCPRO2 (buffer
, current_dir
);
1116 = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir
),
1118 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1119 report_file_error ("Setting current directory",
1120 Fcons (current_buffer
->directory
, Qnil
));
1126 CHECK_STRING (name
, 0);
1130 CHECK_STRING (program
, 2);
1133 /* Make a one member argv with all args concatenated
1134 together separated by a blank. */
1135 len
= STRING_BYTES (XSTRING (program
)) + 2;
1136 for (i
= 3; i
< nargs
; i
++)
1139 CHECK_STRING (tem
, i
);
1140 len
+= STRING_BYTES (XSTRING (tem
)) + 1; /* count the blank */
1142 new_argv
= (unsigned char *) alloca (len
);
1143 strcpy (new_argv
, XSTRING (program
)->data
);
1144 for (i
= 3; i
< nargs
; i
++)
1147 CHECK_STRING (tem
, i
);
1148 strcat (new_argv
, " ");
1149 strcat (new_argv
, XSTRING (tem
)->data
);
1151 /* Need to add code here to check for program existence on VMS */
1154 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1156 /* If program file name is not absolute, search our path for it */
1157 if (!IS_DIRECTORY_SEP (XSTRING (program
)->data
[0])
1158 && !(XSTRING (program
)->size
> 1
1159 && IS_DEVICE_SEP (XSTRING (program
)->data
[1])))
1161 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1164 GCPRO4 (name
, program
, buffer
, current_dir
);
1165 openp (Vexec_path
, program
, EXEC_SUFFIXES
, &tem
, 1);
1168 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1169 tem
= Fexpand_file_name (tem
, Qnil
);
1170 new_argv
[0] = XSTRING (tem
)->data
;
1174 if (!NILP (Ffile_directory_p (program
)))
1175 error ("Specified program for new process is a directory");
1177 new_argv
[0] = XSTRING (program
)->data
;
1180 for (i
= 3; i
< nargs
; i
++)
1183 CHECK_STRING (tem
, i
);
1184 new_argv
[i
- 2] = XSTRING (tem
)->data
;
1186 new_argv
[i
- 2] = 0;
1187 #endif /* not VMS */
1189 proc
= make_process (name
);
1190 /* If an error occurs and we can't start the process, we want to
1191 remove it from the process list. This means that each error
1192 check in create_process doesn't need to call remove_process
1193 itself; it's all taken care of here. */
1194 record_unwind_protect (start_process_unwind
, proc
);
1196 XPROCESS (proc
)->childp
= Qt
;
1197 XPROCESS (proc
)->command_channel_p
= Qnil
;
1198 XPROCESS (proc
)->buffer
= buffer
;
1199 XPROCESS (proc
)->sentinel
= Qnil
;
1200 XPROCESS (proc
)->filter
= Qnil
;
1201 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1203 /* Make the process marker point into the process buffer (if any). */
1205 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1206 BUF_ZV (XBUFFER (buffer
)),
1207 BUF_ZV_BYTE (XBUFFER (buffer
)));
1209 if (!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
)
1210 || NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
))
1212 XPROCESS (proc
)->decode_coding_system
= Qnil
;
1213 XPROCESS (proc
)->encode_coding_system
= Qnil
;
1217 /* Setup coding systems for communicating with the process. */
1218 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1219 Lisp_Object coding_systems
= Qt
;
1220 Lisp_Object val
, *args2
;
1221 struct gcpro gcpro1
;
1223 if (!NILP (Vcoding_system_for_read
))
1224 val
= Vcoding_system_for_read
;
1225 else if (NILP (current_buffer
->enable_multibyte_characters
))
1229 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1230 args2
[0] = Qstart_process
;
1231 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1233 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1235 if (CONSP (coding_systems
))
1236 val
= XCONS (coding_systems
)->car
;
1237 else if (CONSP (Vdefault_process_coding_system
))
1238 val
= XCONS (Vdefault_process_coding_system
)->car
;
1242 XPROCESS (proc
)->decode_coding_system
= val
;
1244 if (!NILP (Vcoding_system_for_write
))
1245 val
= Vcoding_system_for_write
;
1246 else if (NILP (current_buffer
->enable_multibyte_characters
))
1250 if (EQ (coding_systems
, Qt
))
1252 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof args2
);
1253 args2
[0] = Qstart_process
;
1254 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1257 Ffind_operation_coding_system (nargs
+ 1, args2
);
1260 if (CONSP (coding_systems
))
1261 val
= XCONS (coding_systems
)->cdr
;
1262 else if (CONSP (Vdefault_process_coding_system
))
1263 val
= XCONS (Vdefault_process_coding_system
)->cdr
;
1267 XPROCESS (proc
)->encode_coding_system
= val
;
1270 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
1271 XPROCESS (proc
)->decoding_carryover
= make_number (0);
1272 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
1273 XPROCESS (proc
)->encoding_carryover
= make_number (0);
1275 XPROCESS (proc
)->inherit_coding_system_flag
1276 = (NILP (buffer
) || !inherit_process_coding_system
1279 create_process (proc
, (char **) new_argv
, current_dir
);
1281 return unbind_to (count
, proc
);
1284 /* This function is the unwind_protect form for Fstart_process. If
1285 PROC doesn't have its pid set, then we know someone has signaled
1286 an error and the process wasn't started successfully, so we should
1287 remove it from the process list. */
1289 start_process_unwind (proc
)
1292 if (!PROCESSP (proc
))
1295 /* Was PROC started successfully? */
1296 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1297 remove_process (proc
);
1304 create_process_1 (signo
)
1307 #if defined (USG) && !defined (POSIX_SIGNALS)
1308 /* USG systems forget handlers when they are used;
1309 must reestablish each time */
1310 signal (signo
, create_process_1
);
1314 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1317 /* Mimic blocking of signals on system V, which doesn't really have it. */
1319 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1320 int sigchld_deferred
;
1323 create_process_sigchld ()
1325 signal (SIGCHLD
, create_process_sigchld
);
1327 sigchld_deferred
= 1;
1333 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1335 create_process (process
, new_argv
, current_dir
)
1336 Lisp_Object process
;
1338 Lisp_Object current_dir
;
1340 int pid
, inchannel
, outchannel
;
1342 #ifdef POSIX_SIGNALS
1345 struct sigaction sigint_action
;
1346 struct sigaction sigquit_action
;
1348 struct sigaction sighup_action
;
1350 #else /* !POSIX_SIGNALS */
1352 SIGTYPE (*sigchld
)();
1354 #endif /* !POSIX_SIGNALS */
1355 /* Use volatile to protect variables from being clobbered by longjmp. */
1356 volatile int forkin
, forkout
;
1357 volatile int pty_flag
= 0;
1358 extern char **environ
;
1360 inchannel
= outchannel
= -1;
1363 if (!NILP (Vprocess_connection_type
))
1364 outchannel
= inchannel
= allocate_pty ();
1369 /* On USG systems it does not work to open the pty's tty here
1370 and then close and reopen it in the child. */
1372 /* Don't let this terminal become our controlling terminal
1373 (in case we don't have one). */
1374 forkout
= forkin
= open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1376 forkout
= forkin
= open (pty_name
, O_RDWR
, 0);
1379 report_file_error ("Opening pty", Qnil
);
1381 forkin
= forkout
= -1;
1382 #endif /* not USG */
1386 #endif /* HAVE_PTYS */
1389 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1390 report_file_error ("Opening socketpair", Qnil
);
1391 outchannel
= inchannel
= sv
[0];
1392 forkout
= forkin
= sv
[1];
1394 #else /* not SKTPAIR */
1403 #endif /* not SKTPAIR */
1406 /* Replaced by close_process_descs */
1407 set_exclusive_use (inchannel
);
1408 set_exclusive_use (outchannel
);
1411 /* Stride people say it's a mystery why this is needed
1412 as well as the O_NDELAY, but that it fails without this. */
1413 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1416 ioctl (inchannel
, FIONBIO
, &one
);
1421 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1422 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1425 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1426 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1430 /* Record this as an active process, with its channels.
1431 As a result, child_setup will close Emacs's side of the pipes. */
1432 chan_process
[inchannel
] = process
;
1433 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1434 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1435 /* Record the tty descriptor used in the subprocess. */
1437 XPROCESS (process
)->subtty
= Qnil
;
1439 XSETFASTINT (XPROCESS (process
)->subtty
, forkin
);
1440 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1441 XPROCESS (process
)->status
= Qrun
;
1442 if (!proc_decode_coding_system
[inchannel
])
1443 proc_decode_coding_system
[inchannel
]
1444 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
1445 setup_coding_system (XPROCESS (process
)->decode_coding_system
,
1446 proc_decode_coding_system
[inchannel
]);
1447 if (!proc_encode_coding_system
[outchannel
])
1448 proc_encode_coding_system
[outchannel
]
1449 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
1450 setup_coding_system (XPROCESS (process
)->encode_coding_system
,
1451 proc_encode_coding_system
[outchannel
]);
1453 if (CODING_REQUIRE_ENCODING (proc_encode_coding_system
[outchannel
]))
1455 /* Here we encode arguments by the coding system used for
1456 sending data to the process. We don't support using
1457 different coding systems for encoding arguments and for
1458 encoding data sent to the process. */
1459 struct gcpro gcpro1
;
1461 struct coding_system
*coding
= proc_encode_coding_system
[outchannel
];
1463 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
1465 while (new_argv
[i
] != 0)
1467 int len
= strlen (new_argv
[i
]);
1468 int size
= encoding_buffer_size (coding
, len
);
1469 unsigned char *buf
= (unsigned char *) alloca (size
);
1471 encode_coding (coding
, (unsigned char *)new_argv
[i
], buf
, len
, size
);
1472 buf
[coding
->produced
] = 0;
1473 /* We don't have to free new_argv[i] because it points to a
1474 Lisp string given as an argument to `start-process'. */
1475 new_argv
[i
++] = (char *) buf
;
1478 coding
->mode
&= ~CODING_MODE_LAST_BLOCK
;
1481 /* Delay interrupts until we have a chance to store
1482 the new fork's pid in its process structure */
1483 #ifdef POSIX_SIGNALS
1484 sigemptyset (&blocked
);
1486 sigaddset (&blocked
, SIGCHLD
);
1489 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1490 this sets the parent's signal handlers as well as the child's.
1491 So delay all interrupts whose handlers the child might munge,
1492 and record the current handlers so they can be restored later. */
1493 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1494 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1496 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1498 #endif /* HAVE_VFORK */
1499 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1500 #else /* !POSIX_SIGNALS */
1504 #else /* not BSD4_1 */
1505 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1506 sigsetmask (sigmask (SIGCHLD
));
1507 #else /* ordinary USG */
1509 sigchld_deferred
= 0;
1510 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1512 #endif /* ordinary USG */
1513 #endif /* not BSD4_1 */
1514 #endif /* SIGCHLD */
1515 #endif /* !POSIX_SIGNALS */
1517 FD_SET (inchannel
, &input_wait_mask
);
1518 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1519 if (inchannel
> max_process_desc
)
1520 max_process_desc
= inchannel
;
1522 /* Until we store the proper pid, enable sigchld_handler
1523 to recognize an unknown pid as standing for this process.
1524 It is very important not to let this `marker' value stay
1525 in the table after this function has returned; if it does
1526 it might cause call-process to hang and subsequent asynchronous
1527 processes to get their return values scrambled. */
1528 XSETINT (XPROCESS (process
)->pid
, -1);
1533 /* child_setup must clobber environ on systems with true vfork.
1534 Protect it from permanent change. */
1535 char **save_environ
= environ
;
1537 current_dir
= ENCODE_FILE (current_dir
);
1542 #endif /* not WINDOWSNT */
1544 int xforkin
= forkin
;
1545 int xforkout
= forkout
;
1547 #if 0 /* This was probably a mistake--it duplicates code later on,
1548 but fails to handle all the cases. */
1549 /* Make sure SIGCHLD is not blocked in the child. */
1550 sigsetmask (SIGEMPTYMASK
);
1553 /* Make the pty be the controlling terminal of the process. */
1555 /* First, disconnect its current controlling terminal. */
1557 /* We tried doing setsid only if pty_flag, but it caused
1558 process_set_signal to fail on SGI when using a pipe. */
1560 /* Make the pty's terminal the controlling terminal. */
1564 /* We ignore the return value
1565 because faith@cs.unc.edu says that is necessary on Linux. */
1566 ioctl (xforkin
, TIOCSCTTY
, 0);
1569 #else /* not HAVE_SETSID */
1571 /* It's very important to call setpgrp here and no time
1572 afterwards. Otherwise, we lose our controlling tty which
1573 is set when we open the pty. */
1576 #endif /* not HAVE_SETSID */
1577 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1578 if (pty_flag
&& xforkin
>= 0)
1581 tcgetattr (xforkin
, &t
);
1583 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1584 write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1587 #if defined (NTTYDISC) && defined (TIOCSETD)
1588 if (pty_flag
&& xforkin
>= 0)
1590 /* Use new line discipline. */
1591 int ldisc
= NTTYDISC
;
1592 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1597 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1598 can do TIOCSPGRP only to the process's controlling tty. */
1601 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1602 I can't test it since I don't have 4.3. */
1603 int j
= open ("/dev/tty", O_RDWR
, 0);
1604 ioctl (j
, TIOCNOTTY
, 0);
1607 /* In order to get a controlling terminal on some versions
1608 of BSD, it is necessary to put the process in pgrp 0
1609 before it opens the terminal. */
1617 #endif /* TIOCNOTTY */
1619 #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY)
1620 /*** There is a suggestion that this ought to be a
1621 conditional on TIOCSPGRP,
1622 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1623 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1624 that system does seem to need this code, even though
1625 both HAVE_SETSID and TIOCSCTTY are defined. */
1626 /* Now close the pty (if we had it open) and reopen it.
1627 This makes the pty the controlling terminal of the subprocess. */
1630 #ifdef SET_CHILD_PTY_PGRP
1631 int pgrp
= getpid ();
1634 /* I wonder if close (open (pty_name, ...)) would work? */
1637 xforkout
= xforkin
= open (pty_name
, O_RDWR
, 0);
1641 write (1, "Couldn't open the pty terminal ", 31);
1642 write (1, pty_name
, strlen (pty_name
));
1647 #ifdef SET_CHILD_PTY_PGRP
1648 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1649 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1652 #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */
1654 #ifdef SETUP_SLAVE_PTY
1659 #endif /* SETUP_SLAVE_PTY */
1661 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1662 Now reenable it in the child, so it will die when we want it to. */
1664 signal (SIGHUP
, SIG_DFL
);
1666 #endif /* HAVE_PTYS */
1668 signal (SIGINT
, SIG_DFL
);
1669 signal (SIGQUIT
, SIG_DFL
);
1671 /* Stop blocking signals in the child. */
1672 #ifdef POSIX_SIGNALS
1673 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1674 #else /* !POSIX_SIGNALS */
1678 #else /* not BSD4_1 */
1679 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1680 sigsetmask (SIGEMPTYMASK
);
1681 #else /* ordinary USG */
1683 signal (SIGCHLD
, sigchld
);
1685 #endif /* ordinary USG */
1686 #endif /* not BSD4_1 */
1687 #endif /* SIGCHLD */
1688 #endif /* !POSIX_SIGNALS */
1691 child_setup_tty (xforkout
);
1693 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1694 new_argv
, 1, current_dir
);
1695 #else /* not WINDOWSNT */
1696 child_setup (xforkin
, xforkout
, xforkout
,
1697 new_argv
, 1, current_dir
);
1698 #endif /* not WINDOWSNT */
1700 environ
= save_environ
;
1705 /* This runs in the Emacs process. */
1710 if (forkin
!= forkout
&& forkout
>= 0)
1715 /* vfork succeeded. */
1716 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
1719 register_child (pid
, inchannel
);
1720 #endif /* WINDOWSNT */
1722 /* If the subfork execv fails, and it exits,
1723 this close hangs. I don't know why.
1724 So have an interrupt jar it loose. */
1726 signal (SIGALRM
, create_process_1
);
1728 XPROCESS (process
)->subtty
= Qnil
;
1733 if (forkin
!= forkout
&& forkout
>= 0)
1738 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1741 XPROCESS (process
)->tty_name
= Qnil
;
1744 /* Restore the signal state whether vfork succeeded or not.
1745 (We will signal an error, below, if it failed.) */
1746 #ifdef POSIX_SIGNALS
1748 /* Restore the parent's signal handlers. */
1749 sigaction (SIGINT
, &sigint_action
, 0);
1750 sigaction (SIGQUIT
, &sigquit_action
, 0);
1752 sigaction (SIGHUP
, &sighup_action
, 0);
1754 #endif /* HAVE_VFORK */
1755 /* Stop blocking signals in the parent. */
1756 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1757 #else /* !POSIX_SIGNALS */
1761 #else /* not BSD4_1 */
1762 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1763 sigsetmask (SIGEMPTYMASK
);
1764 #else /* ordinary USG */
1766 signal (SIGCHLD
, sigchld
);
1767 /* Now really handle any of these signals
1768 that came in during this function. */
1769 if (sigchld_deferred
)
1770 kill (getpid (), SIGCHLD
);
1772 #endif /* ordinary USG */
1773 #endif /* not BSD4_1 */
1774 #endif /* SIGCHLD */
1775 #endif /* !POSIX_SIGNALS */
1777 /* Now generate the error if vfork failed. */
1779 report_file_error ("Doing vfork", Qnil
);
1781 #endif /* not VMS */
1785 /* open a TCP network connection to a given HOST/SERVICE. Treated
1786 exactly like a normal process when reading and writing. Only
1787 differences are in status display and process deletion. A network
1788 connection has no PID; you cannot signal it. All you can do is
1789 deactivate and close it via delete-process */
1791 DEFUN ("open-network-stream", Fopen_network_stream
, Sopen_network_stream
,
1793 "Open a TCP connection for a service to a host.\n\
1794 Returns a subprocess-object to represent the connection.\n\
1795 Input and output work as for subprocesses; `delete-process' closes it.\n\
1796 Args are NAME BUFFER HOST SERVICE.\n\
1797 NAME is name for process. It is modified if necessary to make it unique.\n\
1798 BUFFER is the buffer (or buffer-name) to associate with the process.\n\
1799 Process output goes at end of that buffer, unless you specify\n\
1800 an output stream or filter function to handle the output.\n\
1801 BUFFER may be also nil, meaning that this process is not associated\n\
1803 Third arg is name of the host to connect to, or its IP address.\n\
1804 Fourth arg SERVICE is name of the service desired, or an integer\n\
1805 specifying a port number to connect to.")
1806 (name
, buffer
, host
, service
)
1807 Lisp_Object name
, buffer
, host
, service
;
1811 struct sockaddr_in address
;
1812 struct servent
*svc_info
;
1813 struct hostent
*host_info_ptr
, host_info
;
1814 char *(addr_list
[2]);
1815 IN_ADDR numeric_addr
;
1819 struct hostent host_info_fixed
;
1820 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1822 int count
= specpdl_ptr
- specpdl
;
1825 /* Ensure socket support is loaded if available. */
1826 init_winsock (TRUE
);
1829 GCPRO4 (name
, buffer
, host
, service
);
1830 CHECK_STRING (name
, 0);
1831 CHECK_STRING (host
, 0);
1832 if (INTEGERP (service
))
1833 port
= htons ((unsigned short) XINT (service
));
1836 CHECK_STRING (service
, 0);
1837 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
1839 error ("Unknown service \"%s\"", XSTRING (service
)->data
);
1840 port
= svc_info
->s_port
;
1843 /* Slow down polling to every ten seconds.
1844 Some kernels have a bug which causes retrying connect to fail
1845 after a connect. Polling can interfere with gethostbyname too. */
1846 #ifdef POLL_FOR_INPUT
1847 bind_polling_period (10);
1858 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
1861 if (! (host_info_ptr
== 0 && h_errno
== TRY_AGAIN
))
1864 Fsleep_for (make_number (1), Qnil
);
1866 if (host_info_ptr
== 0)
1867 /* Attempt to interpret host as numeric inet address */
1869 numeric_addr
= inet_addr ((char *) XSTRING (host
)->data
);
1870 if (NUMERIC_ADDR_ERROR
)
1871 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
1873 host_info_ptr
= &host_info
;
1874 host_info
.h_name
= 0;
1875 host_info
.h_aliases
= 0;
1876 host_info
.h_addrtype
= AF_INET
;
1878 /* Older machines have only one address slot called h_addr.
1879 Newer machines have h_addr_list, but #define h_addr to
1880 be its first element. */
1881 host_info
.h_addr_list
= &(addr_list
[0]);
1883 host_info
.h_addr
= (char*)(&numeric_addr
);
1885 /* numeric_addr isn't null-terminated; it has fixed length. */
1886 host_info
.h_length
= sizeof (numeric_addr
);
1889 bzero (&address
, sizeof address
);
1890 bcopy (host_info_ptr
->h_addr
, (char *) &address
.sin_addr
,
1891 host_info_ptr
->h_length
);
1892 address
.sin_family
= host_info_ptr
->h_addrtype
;
1893 address
.sin_port
= port
;
1895 s
= socket (host_info_ptr
->h_addrtype
, SOCK_STREAM
, 0);
1897 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1899 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
1900 when connect is interrupted. So let's not let it get interrupted.
1901 Note we do not turn off polling, because polling is only used
1902 when not interrupt_input, and thus not normally used on the systems
1903 which have this bug. On systems which use polling, there's no way
1904 to quit if polling is turned off. */
1905 if (interrupt_input
)
1913 if (connect (s
, (struct sockaddr
*) &address
, sizeof address
) == -1
1914 && errno
!= EISCONN
)
1922 if (errno
== EADDRINUSE
&& retry
< 20)
1924 /* A delay here is needed on some FreeBSD systems,
1925 and it is harmless, since this retrying takes time anyway
1926 and should be infrequent. */
1927 Fsleep_for (make_number (1), Qnil
);
1934 if (interrupt_input
)
1938 report_file_error ("connection failed",
1939 Fcons (host
, Fcons (name
, Qnil
)));
1944 #ifdef POLL_FOR_INPUT
1945 unbind_to (count
, Qnil
);
1948 if (interrupt_input
)
1952 s
= connect_server (0);
1954 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1955 send_command (s
, C_PORT
, 0, "%s:%d", XSTRING (host
)->data
, ntohs (port
));
1956 send_command (s
, C_DUMB
, 1, 0);
1963 buffer
= Fget_buffer_create (buffer
);
1964 proc
= make_process (name
);
1966 chan_process
[inch
] = proc
;
1969 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
1972 fcntl (inch
, F_SETFL
, O_NDELAY
);
1976 XPROCESS (proc
)->childp
= Fcons (host
, Fcons (service
, Qnil
));
1977 XPROCESS (proc
)->command_channel_p
= Qnil
;
1978 XPROCESS (proc
)->buffer
= buffer
;
1979 XPROCESS (proc
)->sentinel
= Qnil
;
1980 XPROCESS (proc
)->filter
= Qnil
;
1981 XPROCESS (proc
)->command
= Qnil
;
1982 XPROCESS (proc
)->pid
= Qnil
;
1983 XSETINT (XPROCESS (proc
)->infd
, inch
);
1984 XSETINT (XPROCESS (proc
)->outfd
, outch
);
1985 XPROCESS (proc
)->status
= Qrun
;
1986 FD_SET (inch
, &input_wait_mask
);
1987 FD_SET (inch
, &non_keyboard_wait_mask
);
1988 if (inch
> max_process_desc
)
1989 max_process_desc
= inch
;
1991 if (!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
)
1992 || NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
))
1994 XPROCESS (proc
)->decode_coding_system
= Qnil
;
1995 XPROCESS (proc
)->encode_coding_system
= Qnil
;
1999 /* Setup coding systems for communicating with the network stream. */
2000 struct gcpro gcpro1
;
2001 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
2002 Lisp_Object coding_systems
= Qt
;
2003 Lisp_Object args
[5], val
;
2005 if (!NILP (Vcoding_system_for_read
))
2006 val
= Vcoding_system_for_read
;
2007 else if (NILP (current_buffer
->enable_multibyte_characters
))
2008 /* We dare not decode end-of-line format by setting VAL to
2009 Qraw_text, because the existing Emacs Lisp libraries
2010 assume that they receive bare code including a sequene of
2015 args
[0] = Qopen_network_stream
, args
[1] = name
,
2016 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
2018 coding_systems
= Ffind_operation_coding_system (5, args
);
2020 if (CONSP (coding_systems
))
2021 val
= XCONS (coding_systems
)->car
;
2022 else if (CONSP (Vdefault_process_coding_system
))
2023 val
= XCONS (Vdefault_process_coding_system
)->car
;
2027 XPROCESS (proc
)->decode_coding_system
= val
;
2029 if (!NILP (Vcoding_system_for_write
))
2030 val
= Vcoding_system_for_write
;
2031 else if (NILP (current_buffer
->enable_multibyte_characters
))
2035 if (EQ (coding_systems
, Qt
))
2037 args
[0] = Qopen_network_stream
, args
[1] = name
,
2038 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
2040 coding_systems
= Ffind_operation_coding_system (5, args
);
2043 if (CONSP (coding_systems
))
2044 val
= XCONS (coding_systems
)->cdr
;
2045 else if (CONSP (Vdefault_process_coding_system
))
2046 val
= XCONS (Vdefault_process_coding_system
)->cdr
;
2050 XPROCESS (proc
)->encode_coding_system
= val
;
2053 if (!proc_decode_coding_system
[inch
])
2054 proc_decode_coding_system
[inch
]
2055 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
2056 setup_coding_system (XPROCESS (proc
)->decode_coding_system
,
2057 proc_decode_coding_system
[inch
]);
2058 if (!proc_encode_coding_system
[outch
])
2059 proc_encode_coding_system
[outch
]
2060 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
2061 setup_coding_system (XPROCESS (proc
)->encode_coding_system
,
2062 proc_encode_coding_system
[outch
]);
2064 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
2065 XPROCESS (proc
)->decoding_carryover
= make_number (0);
2066 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
2067 XPROCESS (proc
)->encoding_carryover
= make_number (0);
2069 XPROCESS (proc
)->inherit_coding_system_flag
2070 = (NILP (buffer
) || !inherit_process_coding_system
2076 #endif /* HAVE_SOCKETS */
2079 deactivate_process (proc
)
2082 register int inchannel
, outchannel
;
2083 register struct Lisp_Process
*p
= XPROCESS (proc
);
2085 inchannel
= XINT (p
->infd
);
2086 outchannel
= XINT (p
->outfd
);
2090 /* Beware SIGCHLD hereabouts. */
2091 flush_pending_output (inchannel
);
2094 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
2095 sys$
dassgn (outchannel
);
2096 vs
= get_vms_process_pointer (p
->pid
);
2098 give_back_vms_process_stuff (vs
);
2102 if (outchannel
>= 0 && outchannel
!= inchannel
)
2106 XSETINT (p
->infd
, -1);
2107 XSETINT (p
->outfd
, -1);
2108 chan_process
[inchannel
] = Qnil
;
2109 FD_CLR (inchannel
, &input_wait_mask
);
2110 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
2111 if (inchannel
== max_process_desc
)
2114 /* We just closed the highest-numbered process input descriptor,
2115 so recompute the highest-numbered one now. */
2116 max_process_desc
= 0;
2117 for (i
= 0; i
< MAXDESC
; i
++)
2118 if (!NILP (chan_process
[i
]))
2119 max_process_desc
= i
;
2124 /* Close all descriptors currently in use for communication
2125 with subprocess. This is used in a newly-forked subprocess
2126 to get rid of irrelevant descriptors. */
2129 close_process_descs ()
2133 for (i
= 0; i
< MAXDESC
; i
++)
2135 Lisp_Object process
;
2136 process
= chan_process
[i
];
2137 if (!NILP (process
))
2139 int in
= XINT (XPROCESS (process
)->infd
);
2140 int out
= XINT (XPROCESS (process
)->outfd
);
2143 if (out
>= 0 && in
!= out
)
2150 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
2152 "Allow any pending output from subprocesses to be read by Emacs.\n\
2153 It is read into the process' buffers or given to their filter functions.\n\
2154 Non-nil arg PROCESS means do not return until some output has been received\n\
2156 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
2157 seconds and microseconds to wait; return after that much time whether\n\
2158 or not there is input.\n\
2159 Return non-nil iff we received any output before the timeout expired.")
2160 (process
, timeout
, timeout_msecs
)
2161 register Lisp_Object process
, timeout
, timeout_msecs
;
2166 if (! NILP (timeout_msecs
))
2168 CHECK_NUMBER (timeout_msecs
, 2);
2169 useconds
= XINT (timeout_msecs
);
2170 if (!INTEGERP (timeout
))
2171 XSETINT (timeout
, 0);
2174 int carry
= useconds
/ 1000000;
2176 XSETINT (timeout
, XINT (timeout
) + carry
);
2177 useconds
-= carry
* 1000000;
2179 /* I think this clause is necessary because C doesn't
2180 guarantee a particular rounding direction for negative
2184 XSETINT (timeout
, XINT (timeout
) - 1);
2185 useconds
+= 1000000;
2192 if (! NILP (timeout
))
2194 CHECK_NUMBER (timeout
, 1);
2195 seconds
= XINT (timeout
);
2196 if (seconds
< 0 || (seconds
== 0 && useconds
== 0))
2208 XSETFASTINT (process
, 0);
2211 (wait_reading_process_input (seconds
, useconds
, process
, 0)
2215 /* This variable is different from waiting_for_input in keyboard.c.
2216 It is used to communicate to a lisp process-filter/sentinel (via the
2217 function Fwaiting_for_user_input_p below) whether emacs was waiting
2218 for user-input when that process-filter was called.
2219 waiting_for_input cannot be used as that is by definition 0 when
2220 lisp code is being evalled.
2221 This is also used in record_asynch_buffer_change.
2222 For that purpose, this must be 0
2223 when not inside wait_reading_process_input. */
2224 static int waiting_for_user_input_p
;
2226 /* This is here so breakpoints can be put on it. */
2228 wait_reading_process_input_1 ()
2232 /* Read and dispose of subprocess output while waiting for timeout to
2233 elapse and/or keyboard input to be available.
2236 timeout in seconds, or
2237 zero for no limit, or
2238 -1 means gobble data immediately available but don't wait for any.
2241 an additional duration to wait, measured in microseconds.
2242 If this is nonzero and time_limit is 0, then the timeout
2243 consists of MICROSECS only.
2245 READ_KBD is a lisp value:
2246 0 to ignore keyboard input, or
2247 1 to return when input is available, or
2248 -1 meaning caller will actually read the input, so don't throw to
2249 the quit handler, or
2250 a cons cell, meaning wait until its car is non-nil
2251 (and gobble terminal input into the buffer if any arrives), or
2252 a process object, meaning wait until something arrives from that
2253 process. The return value is true iff we read some input from
2256 DO_DISPLAY != 0 means redisplay should be done to show subprocess
2257 output that arrives.
2259 If READ_KBD is a pointer to a struct Lisp_Process, then the
2260 function returns true iff we received input from that process
2261 before the timeout elapsed.
2262 Otherwise, return true iff we received input from any process. */
2265 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
2266 int time_limit
, microsecs
;
2267 Lisp_Object read_kbd
;
2270 register int channel
, nfds
, m
;
2271 static SELECT_TYPE Available
;
2274 EMACS_TIME timeout
, end_time
, garbage
;
2276 int wait_channel
= -1;
2277 struct Lisp_Process
*wait_proc
= 0;
2278 int got_some_input
= 0;
2279 Lisp_Object
*wait_for_cell
= 0;
2281 FD_ZERO (&Available
);
2283 /* If read_kbd is a process to watch, set wait_proc and wait_channel
2285 if (PROCESSP (read_kbd
))
2287 wait_proc
= XPROCESS (read_kbd
);
2288 wait_channel
= XINT (wait_proc
->infd
);
2289 XSETFASTINT (read_kbd
, 0);
2292 /* If waiting for non-nil in a cell, record where. */
2293 if (CONSP (read_kbd
))
2295 wait_for_cell
= &XCONS (read_kbd
)->car
;
2296 XSETFASTINT (read_kbd
, 0);
2299 waiting_for_user_input_p
= XINT (read_kbd
);
2301 /* Since we may need to wait several times,
2302 compute the absolute time to return at. */
2303 if (time_limit
|| microsecs
)
2305 EMACS_GET_TIME (end_time
);
2306 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
2307 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
2310 /* AlainF 5-Jul-1996
2311 HP-UX 10.10 seem to have problems with signals coming in
2312 Causes "poll: interrupted system call" messages when Emacs is run
2314 Turn off periodic alarms (in case they are in use) */
2320 int timeout_reduced_for_timers
= 0;
2322 /* If calling from keyboard input, do not quit
2323 since we want to return C-g as an input character.
2324 Otherwise, do pending quit if requested. */
2325 if (XINT (read_kbd
) >= 0)
2328 /* Exit now if the cell we're waiting for became non-nil. */
2329 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2332 /* Compute time from now till when time limit is up */
2333 /* Exit if already run out */
2334 if (time_limit
== -1)
2336 /* -1 specified for timeout means
2337 gobble output available now
2338 but don't wait at all. */
2340 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2342 else if (time_limit
|| microsecs
)
2344 EMACS_GET_TIME (timeout
);
2345 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
2346 if (EMACS_TIME_NEG_P (timeout
))
2351 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
2354 /* Normally we run timers here.
2355 But not if wait_for_cell; in those cases,
2356 the wait is supposed to be short,
2357 and those callers cannot handle running arbitrary Lisp code here. */
2358 if (! wait_for_cell
)
2360 EMACS_TIME timer_delay
;
2364 old_timers_run
= timers_run
;
2365 timer_delay
= timer_check (1);
2366 if (timers_run
!= old_timers_run
&& do_display
)
2368 redisplay_preserve_echo_area ();
2369 /* We must retry, since a timer may have requeued itself
2370 and that could alter the time_delay. */
2374 /* If there is unread keyboard input, also return. */
2375 if (XINT (read_kbd
) != 0
2376 && requeued_events_pending_p ())
2379 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
2381 EMACS_TIME difference
;
2382 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
2383 if (EMACS_TIME_NEG_P (difference
))
2385 timeout
= timer_delay
;
2386 timeout_reduced_for_timers
= 1;
2389 /* If time_limit is -1, we are not going to wait at all. */
2390 else if (time_limit
!= -1)
2392 /* This is so a breakpoint can be put here. */
2393 wait_reading_process_input_1 ();
2397 /* Cause C-g and alarm signals to take immediate action,
2398 and cause input available signals to zero out timeout.
2400 It is important that we do this before checking for process
2401 activity. If we get a SIGCHLD after the explicit checks for
2402 process activity, timeout is the only way we will know. */
2403 if (XINT (read_kbd
) < 0)
2404 set_waiting_for_input (&timeout
);
2406 /* If status of something has changed, and no input is
2407 available, notify the user of the change right away. After
2408 this explicit check, we'll let the SIGCHLD handler zap
2409 timeout to get our attention. */
2410 if (update_tick
!= process_tick
&& do_display
)
2412 Atemp
= input_wait_mask
;
2413 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2414 if ((select (max (max_process_desc
, max_keyboard_desc
) + 1,
2415 &Atemp
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2419 /* It's okay for us to do this and then continue with
2420 the loop, since timeout has already been zeroed out. */
2421 clear_waiting_for_input ();
2426 /* Don't wait for output from a non-running process. */
2427 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
2428 update_status (wait_proc
);
2430 && ! EQ (wait_proc
->status
, Qrun
))
2432 int nread
, total_nread
= 0;
2434 clear_waiting_for_input ();
2435 XSETPROCESS (proc
, wait_proc
);
2437 /* Read data from the process, until we exhaust it. */
2438 while (XINT (wait_proc
->infd
) >= 0
2440 = read_process_output (proc
, XINT (wait_proc
->infd
))))
2443 total_nread
+= nread
;
2445 else if (nread
== -1 && EIO
== errno
)
2449 if (total_nread
> 0 && do_display
)
2450 redisplay_preserve_echo_area ();
2455 /* Wait till there is something to do */
2458 Available
= non_process_wait_mask
;
2459 else if (! XINT (read_kbd
))
2460 Available
= non_keyboard_wait_mask
;
2462 Available
= input_wait_mask
;
2464 /* If frame size has changed or the window is newly mapped,
2465 redisplay now, before we start to wait. There is a race
2466 condition here; if a SIGIO arrives between now and the select
2467 and indicates that a frame is trashed, the select may block
2468 displaying a trashed screen. */
2469 if (frame_garbaged
&& do_display
)
2471 clear_waiting_for_input ();
2472 redisplay_preserve_echo_area ();
2473 if (XINT (read_kbd
) < 0)
2474 set_waiting_for_input (&timeout
);
2477 if (XINT (read_kbd
) && detect_input_pending ())
2480 FD_ZERO (&Available
);
2483 nfds
= select (max (max_process_desc
, max_keyboard_desc
) + 1,
2484 &Available
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2489 /* Make C-g and alarm signals set flags again */
2490 clear_waiting_for_input ();
2492 /* If we woke up due to SIGWINCH, actually change size now. */
2493 do_pending_window_change ();
2495 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
2496 /* We wanted the full specified time, so return now. */
2500 if (xerrno
== EINTR
)
2501 FD_ZERO (&Available
);
2503 /* Ultrix select seems to return ENOMEM when it is
2504 interrupted. Treat it just like EINTR. Bleah. Note
2505 that we want to test for the "ultrix" CPP symbol, not
2506 "__ultrix__"; the latter is only defined under GCC, but
2507 not by DEC's bundled CC. -JimB */
2508 else if (xerrno
== ENOMEM
)
2509 FD_ZERO (&Available
);
2512 /* This happens for no known reason on ALLIANT.
2513 I am guessing that this is the right response. -- RMS. */
2514 else if (xerrno
== EFAULT
)
2515 FD_ZERO (&Available
);
2517 else if (xerrno
== EBADF
)
2520 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
2521 the child's closure of the pts gives the parent a SIGHUP, and
2522 the ptc file descriptor is automatically closed,
2523 yielding EBADF here or at select() call above.
2524 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
2525 in m/ibmrt-aix.h), and here we just ignore the select error.
2526 Cleanup occurs c/o status_notify after SIGCLD. */
2527 FD_ZERO (&Available
); /* Cannot depend on values returned */
2533 error ("select error: %s", strerror (xerrno
));
2535 #if defined(sun) && !defined(USG5_4)
2536 else if (nfds
> 0 && keyboard_bit_set (&Available
)
2538 /* System sometimes fails to deliver SIGIO.
2540 David J. Mackenzie says that Emacs doesn't compile under
2541 Solaris if this code is enabled, thus the USG5_4 in the CPP
2542 conditional. "I haven't noticed any ill effects so far.
2543 If you find a Solaris expert somewhere, they might know
2545 kill (getpid (), SIGIO
);
2548 #if 0 /* When polling is used, interrupt_input is 0,
2549 so get_input_pending should read the input.
2550 So this should not be needed. */
2551 /* If we are using polling for input,
2552 and we see input available, make it get read now.
2553 Otherwise it might not actually get read for a second.
2554 And on hpux, since we turn off polling in wait_reading_process_input,
2555 it might never get read at all if we don't spend much time
2556 outside of wait_reading_process_input. */
2557 if (XINT (read_kbd
) && interrupt_input
2558 && keyboard_bit_set (&Available
)
2559 && input_polling_used ())
2560 kill (getpid (), SIGALRM
);
2563 /* Check for keyboard input */
2564 /* If there is any, return immediately
2565 to give it higher priority than subprocesses */
2567 if (XINT (read_kbd
) != 0
2568 && detect_input_pending_run_timers (do_display
))
2570 swallow_events (do_display
);
2571 if (detect_input_pending_run_timers (do_display
))
2575 /* If there is unread keyboard input, also return. */
2576 if (XINT (read_kbd
) != 0
2577 && requeued_events_pending_p ())
2580 /* If we are not checking for keyboard input now,
2581 do process events (but don't run any timers).
2582 This is so that X events will be processed.
2583 Otherwise they may have to wait until polling takes place.
2584 That would causes delays in pasting selections, for example.
2586 (We used to do this only if wait_for_cell.) */
2587 if (XINT (read_kbd
) == 0 && detect_input_pending ())
2589 swallow_events (do_display
);
2590 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
2591 if (detect_input_pending ())
2596 /* Exit now if the cell we're waiting for became non-nil. */
2597 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2601 /* If we think we have keyboard input waiting, but didn't get SIGIO,
2602 go read it. This can happen with X on BSD after logging out.
2603 In that case, there really is no input and no SIGIO,
2604 but select says there is input. */
2606 if (XINT (read_kbd
) && interrupt_input
2607 && keyboard_bit_set (&Available
))
2608 kill (getpid (), SIGIO
);
2612 got_some_input
|= nfds
> 0;
2614 /* If checking input just got us a size-change event from X,
2615 obey it now if we should. */
2616 if (XINT (read_kbd
) || wait_for_cell
)
2617 do_pending_window_change ();
2619 /* Check for data from a process. */
2620 /* Really FIRST_PROC_DESC should be 0 on Unix,
2621 but this is safer in the short run. */
2622 for (channel
= 0; channel
<= max_process_desc
; channel
++)
2624 if (FD_ISSET (channel
, &Available
)
2625 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
2629 /* If waiting for this channel, arrange to return as
2630 soon as no more input to be processed. No more
2632 if (wait_channel
== channel
)
2638 proc
= chan_process
[channel
];
2642 /* Read data from the process, starting with our
2643 buffered-ahead character if we have one. */
2645 nread
= read_process_output (proc
, channel
);
2648 /* Since read_process_output can run a filter,
2649 which can call accept-process-output,
2650 don't try to read from any other processes
2651 before doing the select again. */
2652 FD_ZERO (&Available
);
2655 redisplay_preserve_echo_area ();
2658 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2661 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
2662 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
2664 else if (nread
== -1 && errno
== EAGAIN
)
2668 else if (nread
== -1 && errno
== EAGAIN
)
2670 /* Note that we cannot distinguish between no input
2671 available now and a closed pipe.
2672 With luck, a closed pipe will be accompanied by
2673 subprocess termination and SIGCHLD. */
2674 else if (nread
== 0 && !NETCONN_P (proc
))
2676 #endif /* O_NDELAY */
2677 #endif /* O_NONBLOCK */
2679 /* On some OSs with ptys, when the process on one end of
2680 a pty exits, the other end gets an error reading with
2681 errno = EIO instead of getting an EOF (0 bytes read).
2682 Therefore, if we get an error reading and errno =
2683 EIO, just continue, because the child process has
2684 exited and should clean itself up soon (e.g. when we
2686 else if (nread
== -1 && errno
== EIO
)
2688 #endif /* HAVE_PTYS */
2689 /* If we can detect process termination, don't consider the process
2690 gone just because its pipe is closed. */
2692 else if (nread
== 0 && !NETCONN_P (proc
))
2697 /* Preserve status of processes already terminated. */
2698 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2699 deactivate_process (proc
);
2700 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2701 update_status (XPROCESS (proc
));
2702 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2703 XPROCESS (proc
)->status
2704 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2707 } /* end for each file descriptor */
2708 } /* end while exit conditions not met */
2710 waiting_for_user_input_p
= 0;
2712 /* If calling from keyboard input, do not quit
2713 since we want to return C-g as an input character.
2714 Otherwise, do pending quit if requested. */
2715 if (XINT (read_kbd
) >= 0)
2717 /* Prevent input_pending from remaining set if we quit. */
2718 clear_input_pending ();
2722 /* AlainF 5-Jul-1996
2723 HP-UX 10.10 seems to have problems with signals coming in
2724 Causes "poll: interrupted system call" messages when Emacs is run
2726 Turn periodic alarms back on */
2730 return got_some_input
;
2733 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
2736 read_process_output_call (fun_and_args
)
2737 Lisp_Object fun_and_args
;
2739 return apply1 (XCONS (fun_and_args
)->car
, XCONS (fun_and_args
)->cdr
);
2743 read_process_output_error_handler (error
)
2746 cmd_error_internal (error
, "error in process filter: ");
2748 update_echo_area ();
2749 Fsleep_for (make_number (2), Qnil
);
2752 /* Read pending output from the process channel,
2753 starting with our buffered-ahead character if we have one.
2754 Yield number of decoded characters read.
2756 This function reads at most 1024 characters.
2757 If you want to read all available subprocess output,
2758 you must call it repeatedly until it returns zero.
2760 The characters read are decoded according to PROC's coding-system
2764 read_process_output (proc
, channel
)
2766 register int channel
;
2768 register int nchars
, nbytes
;
2771 int chars_allocated
= 0; /* If 1, `chars' should be freed later. */
2775 register Lisp_Object outstream
;
2776 register struct buffer
*old
= current_buffer
;
2777 register struct Lisp_Process
*p
= XPROCESS (proc
);
2778 register int opoint
;
2779 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
2780 int chars_in_decoding_buf
= 0; /* If 1, `chars' points
2781 XSTRING (p->decoding_buf)->data. */
2782 int carryover
= XINT (p
->decoding_carryover
);
2785 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2787 vs
= get_vms_process_pointer (p
->pid
);
2791 return(0); /* Really weird if it does this */
2792 if (!(vs
->iosb
[0] & 1))
2793 return -1; /* I/O error */
2796 error ("Could not get VMS process pointer");
2797 chars
= vs
->inputBuffer
;
2798 nbytes
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2801 start_vms_process_read (vs
); /* Crank up the next read on the process */
2802 return 1; /* Nothing worth printing, say we got 1 */
2806 /* The data carried over in the previous decoding (which are at
2807 the tail of decoding buffer) should be prepended to the new
2808 data read to decode all together. */
2809 char *buf
= (char *) xmalloc (nbytes
+ carryover
);
2811 bcopy (XSTRING (p
->decoding_buf
)->data
2812 + STRING_BYTES (XSTRING (p
->decoding_buf
)) - carryover
,
2814 bcopy (chars
, buf
+ carryover
, nbytes
);
2816 chars_allocated
= 1;
2821 /* See the comment above. */
2822 bcopy (XSTRING (p
->decoding_buf
)->data
2823 + STRING_BYTES (XSTRING (p
->decoding_buf
)) - carryover
,
2826 if (proc_buffered_char
[channel
] < 0)
2827 nbytes
= read (channel
, buf
+ carryover
, (sizeof buf
) - carryover
);
2830 buf
[carryover
] = proc_buffered_char
[channel
];
2831 proc_buffered_char
[channel
] = -1;
2832 nbytes
= read (channel
, buf
+ carryover
+ 1,
2833 (sizeof buf
) - carryover
- 1);
2837 nbytes
= nbytes
+ 1;
2840 #endif /* not VMS */
2842 /* At this point, NBYTES holds number of characters just received
2843 (including the one in proc_buffered_char[channel]). */
2844 if (nbytes
<= 0) return nbytes
;
2846 /* Now set NBYTES how many bytes we must decode. */
2847 nbytes
+= carryover
;
2850 if (CODING_MAY_REQUIRE_DECODING (coding
))
2852 int require
= decoding_buffer_size (coding
, nbytes
);
2855 if (STRING_BYTES (XSTRING (p
->decoding_buf
)) < require
)
2856 p
->decoding_buf
= make_uninit_string (require
);
2857 result
= decode_coding (coding
, chars
, XSTRING (p
->decoding_buf
)->data
,
2858 nbytes
, STRING_BYTES (XSTRING (p
->decoding_buf
)));
2859 carryover
= nbytes
- coding
->consumed
;
2861 /* A new coding system might be found by `decode_coding'. */
2862 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
2864 p
->decode_coding_system
= coding
->symbol
;
2866 /* Don't call setup_coding_system for
2867 proc_decode_coding_system[channel] here. It is done in
2868 detect_coding called via decode_coding above. */
2870 /* If a coding system for encoding is not yet decided, we set
2871 it as the same as coding-system for decoding.
2873 But, before doing that we must check if
2874 proc_encode_coding_system[p->outfd] surely points to a
2875 valid memory because p->outfd will be changed once EOF is
2876 sent to the process. */
2877 if (NILP (p
->encode_coding_system
)
2878 && proc_encode_coding_system
[XINT (p
->outfd
)])
2880 p
->encode_coding_system
= coding
->symbol
;
2881 setup_coding_system (coding
->symbol
,
2882 proc_encode_coding_system
[XINT (p
->outfd
)]);
2887 /* Now we don't need the contents of `chars'. */
2888 if (chars_allocated
)
2891 if (coding
->produced
== 0)
2893 chars
= (char *) XSTRING (p
->decoding_buf
)->data
;
2894 nbytes
= coding
->produced
;
2895 nchars
= (coding
->fake_multibyte
2896 ? multibyte_chars_in_text (chars
, nbytes
)
2897 : coding
->produced_char
);
2898 chars_in_decoding_buf
= 1;
2901 else if (chars_allocated
)
2903 /* Although we don't have to decode the received data, we must
2904 move it to an area which we don't have to free. */
2905 if (! STRINGP (p
->decoding_buf
)
2906 || STRING_BYTES (XSTRING (p
->decoding_buf
)) < nbytes
)
2907 p
->decoding_buf
= make_uninit_string (nbytes
);
2908 bcopy (chars
, XSTRING (p
->decoding_buf
)->data
, nbytes
);
2910 chars
= XSTRING (p
->decoding_buf
)->data
;
2911 nchars
= multibyte_chars_in_text (chars
, nbytes
);
2912 chars_in_decoding_buf
= 1;
2917 XSETINT (p
->decoding_carryover
, carryover
);
2918 Vlast_coding_system_used
= coding
->symbol
;
2920 /* If the caller required, let the process associated buffer
2921 inherit the coding-system used to decode the process output. */
2922 if (! NILP (p
->inherit_coding_system_flag
)
2923 && !NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2925 struct buffer
*prev_buf
= current_buffer
;
2927 Fset_buffer (p
->buffer
);
2928 call1 (intern ("after-insert-file-set-buffer-file-coding-system"),
2929 make_number (nbytes
));
2930 set_buffer_internal (prev_buf
);
2933 /* Read and dispose of the process output. */
2934 outstream
= p
->filter
;
2935 if (!NILP (outstream
))
2937 /* We inhibit quit here instead of just catching it so that
2938 hitting ^G when a filter happens to be running won't screw
2940 int count
= specpdl_ptr
- specpdl
;
2941 Lisp_Object odeactivate
;
2942 Lisp_Object obuffer
, okeymap
;
2944 int outer_running_asynch_code
= running_asynch_code
;
2946 /* No need to gcpro these, because all we do with them later
2947 is test them for EQness, and none of them should be a string. */
2948 odeactivate
= Vdeactivate_mark
;
2949 XSETBUFFER (obuffer
, current_buffer
);
2950 okeymap
= current_buffer
->keymap
;
2952 specbind (Qinhibit_quit
, Qt
);
2953 specbind (Qlast_nonmenu_event
, Qt
);
2955 /* In case we get recursively called,
2956 and we already saved the match data nonrecursively,
2957 save the same match data in safely recursive fashion. */
2958 if (outer_running_asynch_code
)
2961 /* Don't clobber the CURRENT match data, either! */
2962 tem
= Fmatch_data (Qnil
, Qnil
);
2963 restore_match_data ();
2964 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
2965 Fset_match_data (tem
);
2968 /* For speed, if a search happens within this code,
2969 save the match data in a special nonrecursive fashion. */
2970 running_asynch_code
= 1;
2972 text
= make_string_from_bytes (chars
, nchars
, nbytes
);
2973 internal_condition_case_1 (read_process_output_call
,
2975 Fcons (proc
, Fcons (text
, Qnil
))),
2976 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
2977 read_process_output_error_handler
);
2979 /* If we saved the match data nonrecursively, restore it now. */
2980 restore_match_data ();
2981 running_asynch_code
= outer_running_asynch_code
;
2983 /* Handling the process output should not deactivate the mark. */
2984 Vdeactivate_mark
= odeactivate
;
2986 #if 0 /* Call record_asynch_buffer_change unconditionally,
2987 because we might have changed minor modes or other things
2988 that affect key bindings. */
2989 if (! EQ (Fcurrent_buffer (), obuffer
)
2990 || ! EQ (current_buffer
->keymap
, okeymap
))
2992 /* But do it only if the caller is actually going to read events.
2993 Otherwise there's no need to make him wake up, and it could
2994 cause trouble (for example it would make Fsit_for return). */
2995 if (waiting_for_user_input_p
== -1)
2996 record_asynch_buffer_change ();
2999 start_vms_process_read (vs
);
3001 unbind_to (count
, Qnil
);
3005 /* If no filter, write into buffer if it isn't dead. */
3006 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
3008 Lisp_Object old_read_only
;
3009 int old_begv
, old_zv
;
3010 int old_begv_byte
, old_zv_byte
;
3011 Lisp_Object odeactivate
;
3012 int before
, before_byte
;
3015 odeactivate
= Vdeactivate_mark
;
3017 Fset_buffer (p
->buffer
);
3019 opoint_byte
= PT_BYTE
;
3020 old_read_only
= current_buffer
->read_only
;
3023 old_begv_byte
= BEGV_BYTE
;
3024 old_zv_byte
= ZV_BYTE
;
3026 current_buffer
->read_only
= Qnil
;
3028 /* Insert new output into buffer
3029 at the current end-of-output marker,
3030 thus preserving logical ordering of input and output. */
3031 if (XMARKER (p
->mark
)->buffer
)
3032 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
3033 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
3036 SET_PT_BOTH (ZV
, ZV_BYTE
);
3038 before_byte
= PT_BYTE
;
3040 /* If the output marker is outside of the visible region, save
3041 the restriction and widen. */
3042 if (! (BEGV
<= PT
&& PT
<= ZV
))
3045 /* Insert before markers in case we are inserting where
3046 the buffer's mark is, and the user's next command is Meta-y. */
3047 if (chars_in_decoding_buf
)
3049 /* Since multibyteness of p->docoding_buf is corrupted, we
3050 can't use insert_from_string_before_markers. */
3053 temp_buf
= (char *) alloca (nbytes
);
3054 bcopy (XSTRING (p
->decoding_buf
)->data
, temp_buf
, nbytes
);
3055 insert_before_markers (temp_buf
, nbytes
);
3058 insert_1_both (chars
, nchars
, nbytes
, 0, 1, 1);
3059 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
3061 update_mode_lines
++;
3063 /* Make sure opoint and the old restrictions
3064 float ahead of any new text just as point would. */
3065 if (opoint
>= before
)
3067 opoint
+= PT
- before
;
3068 opoint_byte
+= PT_BYTE
- before_byte
;
3070 if (old_begv
> before
)
3072 old_begv
+= PT
- before
;
3073 old_begv_byte
+= PT_BYTE
- before_byte
;
3075 if (old_zv
>= before
)
3077 old_zv
+= PT
- before
;
3078 old_zv_byte
+= PT_BYTE
- before_byte
;
3081 /* If the restriction isn't what it should be, set it. */
3082 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
3083 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
3085 /* Handling the process output should not deactivate the mark. */
3086 Vdeactivate_mark
= odeactivate
;
3088 current_buffer
->read_only
= old_read_only
;
3089 SET_PT_BOTH (opoint
, opoint_byte
);
3090 set_buffer_internal (old
);
3093 start_vms_process_read (vs
);
3098 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
3100 "Returns non-nil if emacs is waiting for input from the user.\n\
3101 This is intended for use by asynchronous process output filters and sentinels.")
3104 return (waiting_for_user_input_p
? Qt
: Qnil
);
3107 /* Sending data to subprocess */
3109 jmp_buf send_process_frame
;
3112 send_process_trap ()
3118 longjmp (send_process_frame
, 1);
3121 /* Send some data to process PROC.
3122 BUF is the beginning of the data; LEN is the number of characters.
3123 OBJECT is the Lisp object that the data comes from.
3125 The data is encoded by PROC's coding-system for encoding before it
3126 is sent. But if the data ends at the middle of multi-byte
3127 representation, that incomplete sequence of bytes are sent without
3128 being encoded. Should we store them in a buffer to prepend them to
3129 the data send later? */
3132 send_process (proc
, buf
, len
, object
)
3133 volatile Lisp_Object proc
;
3138 /* Use volatile to protect variables from being clobbered by longjmp. */
3140 volatile unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
3141 struct coding_system
*coding
;
3142 struct gcpro gcpro1
;
3143 int carryover
= XINT (XPROCESS (proc
)->encoding_carryover
);
3148 struct Lisp_Process
*p
= XPROCESS (proc
);
3149 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
3152 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3153 update_status (XPROCESS (proc
));
3154 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3155 error ("Process %s not running", procname
);
3156 if (XINT (XPROCESS (proc
)->outfd
) < 0)
3157 error ("Output file descriptor of %s is closed", procname
);
3159 coding
= proc_encode_coding_system
[XINT (XPROCESS (proc
)->outfd
)];
3160 Vlast_coding_system_used
= coding
->symbol
;
3162 if (CODING_REQUIRE_ENCODING (coding
))
3164 int require
= encoding_buffer_size (coding
, len
);
3166 unsigned char *temp_buf
= NULL
;
3168 /* Remember the offset of data because a string or a buffer may
3169 be relocated. Setting OFFSET to -1 means we don't have to
3171 offset
= (BUFFERP (object
)
3172 ? BUF_PTR_BYTE_POS (XBUFFER (object
), buf
)
3174 ? offset
= buf
- XSTRING (object
)->data
3179 temp_buf
= (unsigned char *) xmalloc (len
+ carryover
);
3183 if (BUFFERP (object
))
3184 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
3185 else if (STRINGP (object
))
3186 buf
= offset
+ XSTRING (object
)->data
;
3187 /* Now we don't have to care relocation. */
3190 bcopy ((XSTRING (XPROCESS (proc
)->encoding_buf
)->data
3191 + STRING_BYTES (XSTRING (XPROCESS (proc
)->encoding_buf
))
3195 bcopy (buf
, temp_buf
+ carryover
, len
);
3199 if (STRING_BYTES (XSTRING (XPROCESS (proc
)->encoding_buf
)) < require
)
3201 XPROCESS (proc
)->encoding_buf
= make_uninit_string (require
);
3205 if (BUFFERP (object
))
3206 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
3207 else if (STRINGP (object
))
3208 buf
= offset
+ XSTRING (object
)->data
;
3211 object
= XPROCESS (proc
)->encoding_buf
;
3212 encode_coding (coding
, buf
, XSTRING (object
)->data
,
3213 len
, STRING_BYTES (XSTRING (object
)));
3214 len
= coding
->produced
;
3215 buf
= XSTRING (object
)->data
;
3221 vs
= get_vms_process_pointer (p
->pid
);
3223 error ("Could not find this process: %x", p
->pid
);
3224 else if (write_to_vms_process (vs
, buf
, len
))
3228 if (pty_max_bytes
== 0)
3230 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
3231 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
3233 if (pty_max_bytes
< 0)
3234 pty_max_bytes
= 250;
3236 pty_max_bytes
= 250;
3238 /* Deduct one, to leave space for the eof. */
3242 if (!setjmp (send_process_frame
))
3246 SIGTYPE (*old_sigpipe
)();
3249 /* Decide how much data we can send in one batch.
3250 Long lines need to be split into multiple batches. */
3251 if (!NILP (XPROCESS (proc
)->pty_flag
))
3253 /* Starting this at zero is always correct when not the first iteration
3254 because the previous iteration ended by sending C-d.
3255 It may not be correct for the first iteration
3256 if a partial line was sent in a separate send_process call.
3257 If that proves worth handling, we need to save linepos
3258 in the process object. */
3260 unsigned char *ptr
= buf
;
3261 unsigned char *end
= buf
+ len
;
3263 /* Scan through this text for a line that is too long. */
3264 while (ptr
!= end
&& linepos
< pty_max_bytes
)
3272 /* If we found one, break the line there
3273 and put in a C-d to force the buffer through. */
3277 /* Send this batch, using one or more write calls. */
3280 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
3281 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
3282 signal (SIGPIPE
, old_sigpipe
);
3288 || errno
== EWOULDBLOCK
3294 /* Buffer is full. Wait, accepting input;
3295 that may allow the program
3296 to finish doing output and read more. */
3301 /* Running filters might relocate buffers or strings.
3302 Arrange to relocate BUF. */
3303 if (BUFFERP (object
))
3304 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
3305 else if (STRINGP (object
))
3306 offset
= buf
- XSTRING (object
)->data
;
3308 XSETFASTINT (zero
, 0);
3309 #ifdef EMACS_HAS_USECS
3310 wait_reading_process_input (0, 20000, zero
, 0);
3312 wait_reading_process_input (1, 0, zero
, 0);
3315 if (BUFFERP (object
))
3316 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
3317 else if (STRINGP (object
))
3318 buf
= offset
+ XSTRING (object
)->data
;
3323 /* This is a real error. */
3324 report_file_error ("writing to process", Fcons (proc
, Qnil
));
3331 /* If we sent just part of the string, put in an EOF
3332 to force it through, before we send the rest. */
3334 Fprocess_send_eof (proc
);
3339 XPROCESS (proc
)->raw_status_low
= Qnil
;
3340 XPROCESS (proc
)->raw_status_high
= Qnil
;
3341 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
3342 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
3343 deactivate_process (proc
);
3345 error ("Error writing to process %s; closed it", procname
);
3347 error ("SIGPIPE raised on process %s; closed it", procname
);
3354 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
3356 "Send current contents of region as input to PROCESS.\n\
3357 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3358 nil, indicating the current buffer's process.\n\
3359 Called from program, takes three arguments, PROCESS, START and END.\n\
3360 If the region is more than 500 characters long,\n\
3361 it is sent in several bunches. This may happen even for shorter regions.\n\
3362 Output from processes can arrive in between bunches.")
3363 (process
, start
, end
)
3364 Lisp_Object process
, start
, end
;
3369 proc
= get_process (process
);
3370 validate_region (&start
, &end
);
3372 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
3373 move_gap (XINT (start
));
3375 start1
= CHAR_TO_BYTE (XINT (start
));
3376 end1
= CHAR_TO_BYTE (XINT (end
));
3377 send_process (proc
, BYTE_POS_ADDR (start1
), end1
- start1
,
3378 Fcurrent_buffer ());
3383 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
3385 "Send PROCESS the contents of STRING as input.\n\
3386 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3387 nil, indicating the current buffer's process.\n\
3388 If STRING is more than 500 characters long,\n\
3389 it is sent in several bunches. This may happen even for shorter strings.\n\
3390 Output from processes can arrive in between bunches.")
3392 Lisp_Object process
, string
;
3395 CHECK_STRING (string
, 1);
3396 proc
= get_process (process
);
3397 send_process (proc
, XSTRING (string
)->data
,
3398 STRING_BYTES (XSTRING (string
)), string
);
3402 /* send a signal number SIGNO to PROCESS.
3403 CURRENT_GROUP means send to the process group that currently owns
3404 the terminal being used to communicate with PROCESS.
3405 This is used for various commands in shell mode.
3406 If NOMSG is zero, insert signal-announcements into process's buffers
3409 If we can, we try to signal PROCESS by sending control characters
3410 down the pty. This allows us to signal inferiors who have changed
3411 their uid, for which killpg would return an EPERM error. */
3414 process_send_signal (process
, signo
, current_group
, nomsg
)
3415 Lisp_Object process
;
3417 Lisp_Object current_group
;
3421 register struct Lisp_Process
*p
;
3425 proc
= get_process (process
);
3426 p
= XPROCESS (proc
);
3428 if (!EQ (p
->childp
, Qt
))
3429 error ("Process %s is not a subprocess",
3430 XSTRING (p
->name
)->data
);
3431 if (XINT (p
->infd
) < 0)
3432 error ("Process %s is not active",
3433 XSTRING (p
->name
)->data
);
3435 if (NILP (p
->pty_flag
))
3436 current_group
= Qnil
;
3438 /* If we are using pgrps, get a pgrp number and make it negative. */
3439 if (!NILP (current_group
))
3441 #ifdef SIGNALS_VIA_CHARACTERS
3442 /* If possible, send signals to the entire pgrp
3443 by sending an input character to it. */
3445 /* TERMIOS is the latest and bestest, and seems most likely to
3446 work. If the system has it, use it. */
3453 tcgetattr (XINT (p
->infd
), &t
);
3454 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
3458 tcgetattr (XINT (p
->infd
), &t
);
3459 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
3463 tcgetattr (XINT (p
->infd
), &t
);
3464 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
3465 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
3467 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
3472 #else /* ! HAVE_TERMIOS */
3474 /* On Berkeley descendants, the following IOCTL's retrieve the
3475 current control characters. */
3476 #if defined (TIOCGLTC) && defined (TIOCGETC)
3484 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
3485 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
3488 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
3489 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
3493 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
3494 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
3496 #endif /* ! defined (SIGTSTP) */
3499 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
3501 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
3508 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3509 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
3512 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3513 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
3517 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3518 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
3520 #endif /* ! defined (SIGTSTP) */
3522 #else /* ! defined (TCGETA) */
3523 Your configuration files are messed up
.
3524 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
3525 you'd better be using one of the alternatives above! */
3526 #endif /* ! defined (TCGETA) */
3527 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
3528 #endif /* ! defined HAVE_TERMIOS */
3529 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
3532 /* Get the pgrp using the tty itself, if we have that.
3533 Otherwise, use the pty to get the pgrp.
3534 On pfa systems, saka@pfu.fujitsu.co.JP writes:
3535 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
3536 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
3537 His patch indicates that if TIOCGPGRP returns an error, then
3538 we should just assume that p->pid is also the process group id. */
3542 if (!NILP (p
->subtty
))
3543 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
3545 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
3549 gid
= - XFASTINT (p
->pid
);
3550 #endif /* ! defined (pfa) */
3556 #else /* ! defined (TIOCGPGRP ) */
3557 /* Can't select pgrps on this system, so we know that
3558 the child itself heads the pgrp. */
3559 gid
= - XFASTINT (p
->pid
);
3560 #endif /* ! defined (TIOCGPGRP ) */
3563 gid
= - XFASTINT (p
->pid
);
3569 p
->raw_status_low
= Qnil
;
3570 p
->raw_status_high
= Qnil
;
3572 XSETINT (p
->tick
, ++process_tick
);
3576 #endif /* ! defined (SIGCONT) */
3579 send_process (proc
, "\003", 1, Qnil
); /* ^C */
3584 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
3589 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
3592 flush_pending_output (XINT (p
->infd
));
3596 /* If we don't have process groups, send the signal to the immediate
3597 subprocess. That isn't really right, but it's better than any
3598 obvious alternative. */
3601 kill (XFASTINT (p
->pid
), signo
);
3605 /* gid may be a pid, or minus a pgrp's number */
3607 if (!NILP (current_group
))
3608 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
3611 gid
= - XFASTINT (p
->pid
);
3614 #else /* ! defined (TIOCSIGSEND) */
3615 EMACS_KILLPG (-gid
, signo
);
3616 #endif /* ! defined (TIOCSIGSEND) */
3619 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
3620 "Interrupt process PROCESS. May be process or name of one.\n\
3621 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
3622 nil or no arg means current buffer's process.\n\
3623 Second arg CURRENT-GROUP non-nil means send signal to\n\
3624 the current process-group of the process's controlling terminal\n\
3625 rather than to the process's own process group.\n\
3626 If the process is a shell, this means interrupt current subjob\n\
3627 rather than the shell.")
3628 (process
, current_group
)
3629 Lisp_Object process
, current_group
;
3631 process_send_signal (process
, SIGINT
, current_group
, 0);
3635 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
3636 "Kill process PROCESS. May be process or name of one.\n\
3637 See function `interrupt-process' for more details on usage.")
3638 (process
, current_group
)
3639 Lisp_Object process
, current_group
;
3641 process_send_signal (process
, SIGKILL
, current_group
, 0);
3645 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
3646 "Send QUIT signal to process PROCESS. May be process or name of one.\n\
3647 See function `interrupt-process' for more details on usage.")
3648 (process
, current_group
)
3649 Lisp_Object process
, current_group
;
3651 process_send_signal (process
, SIGQUIT
, current_group
, 0);
3655 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
3656 "Stop process PROCESS. May be process or name of one.\n\
3657 See function `interrupt-process' for more details on usage.")
3658 (process
, current_group
)
3659 Lisp_Object process
, current_group
;
3662 error ("no SIGTSTP support");
3664 process_send_signal (process
, SIGTSTP
, current_group
, 0);
3669 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
3670 "Continue process PROCESS. May be process or name of one.\n\
3671 See function `interrupt-process' for more details on usage.")
3672 (process
, current_group
)
3673 Lisp_Object process
, current_group
;
3676 process_send_signal (process
, SIGCONT
, current_group
, 0);
3678 error ("no SIGCONT support");
3683 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
3684 2, 2, "nProcess number: \nnSignal code: ",
3685 "Send the process with process id PID the signal with code SIGCODE.\n\
3686 PID must be an integer. The process need not be a child of this Emacs.\n\
3687 SIGCODE may be an integer, or a symbol whose name is a signal name.")
3689 Lisp_Object pid
, sigcode
;
3691 CHECK_NUMBER (pid
, 0);
3693 #define handle_signal(NAME, VALUE) \
3694 else if (!strcmp (name, NAME)) \
3695 XSETINT (sigcode, VALUE)
3697 if (INTEGERP (sigcode
))
3701 unsigned char *name
;
3703 CHECK_SYMBOL (sigcode
, 1);
3704 name
= XSYMBOL (sigcode
)->name
->data
;
3709 handle_signal ("SIGHUP", SIGHUP
);
3712 handle_signal ("SIGINT", SIGINT
);
3715 handle_signal ("SIGQUIT", SIGQUIT
);
3718 handle_signal ("SIGILL", SIGILL
);
3721 handle_signal ("SIGABRT", SIGABRT
);
3724 handle_signal ("SIGEMT", SIGEMT
);
3727 handle_signal ("SIGKILL", SIGKILL
);
3730 handle_signal ("SIGFPE", SIGFPE
);
3733 handle_signal ("SIGBUS", SIGBUS
);
3736 handle_signal ("SIGSEGV", SIGSEGV
);
3739 handle_signal ("SIGSYS", SIGSYS
);
3742 handle_signal ("SIGPIPE", SIGPIPE
);
3745 handle_signal ("SIGALRM", SIGALRM
);
3748 handle_signal ("SIGTERM", SIGTERM
);
3751 handle_signal ("SIGURG", SIGURG
);
3754 handle_signal ("SIGSTOP", SIGSTOP
);
3757 handle_signal ("SIGTSTP", SIGTSTP
);
3760 handle_signal ("SIGCONT", SIGCONT
);
3763 handle_signal ("SIGCHLD", SIGCHLD
);
3766 handle_signal ("SIGTTIN", SIGTTIN
);
3769 handle_signal ("SIGTTOU", SIGTTOU
);
3772 handle_signal ("SIGIO", SIGIO
);
3775 handle_signal ("SIGXCPU", SIGXCPU
);
3778 handle_signal ("SIGXFSZ", SIGXFSZ
);
3781 handle_signal ("SIGVTALRM", SIGVTALRM
);
3784 handle_signal ("SIGPROF", SIGPROF
);
3787 handle_signal ("SIGWINCH", SIGWINCH
);
3790 handle_signal ("SIGINFO", SIGINFO
);
3793 handle_signal ("SIGUSR1", SIGUSR1
);
3796 handle_signal ("SIGUSR2", SIGUSR2
);
3799 error ("Undefined signal name %s", name
);
3802 #undef handle_signal
3804 return make_number (kill (XINT (pid
), XINT (sigcode
)));
3807 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
3808 "Make PROCESS see end-of-file in its input.\n\
3809 Eof comes after any text already sent to it.\n\
3810 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3811 nil, indicating the current buffer's process.\n\
3812 If PROCESS is a network connection, or is a process communicating\n\
3813 through a pipe (as opposed to a pty), then you cannot send any more\n\
3814 text to PROCESS after you call this function.")
3816 Lisp_Object process
;
3820 proc
= get_process (process
);
3822 /* Make sure the process is really alive. */
3823 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3824 update_status (XPROCESS (proc
));
3825 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3826 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
3829 send_process (proc
, "\032", 1, Qnil
); /* ^z */
3831 if (!NILP (XPROCESS (proc
)->pty_flag
))
3832 send_process (proc
, "\004", 1, Qnil
);
3835 #ifdef HAVE_SHUTDOWN
3836 /* If this is a network connection, or socketpair is used
3837 for communication with the subprocess, call shutdown to cause EOF.
3838 (In some old system, shutdown to socketpair doesn't work.
3839 Then we just can't win.) */
3840 if (NILP (XPROCESS (proc
)->pid
)
3841 || XINT (XPROCESS (proc
)->outfd
) == XINT (XPROCESS (proc
)->infd
))
3842 shutdown (XINT (XPROCESS (proc
)->outfd
), 1);
3843 /* In case of socketpair, outfd == infd, so don't close it. */
3844 if (XINT (XPROCESS (proc
)->outfd
) != XINT (XPROCESS (proc
)->infd
))
3845 close (XINT (XPROCESS (proc
)->outfd
));
3846 #else /* not HAVE_SHUTDOWN */
3847 close (XINT (XPROCESS (proc
)->outfd
));
3848 #endif /* not HAVE_SHUTDOWN */
3849 XSETINT (XPROCESS (proc
)->outfd
, open (NULL_DEVICE
, O_WRONLY
));
3855 /* Kill all processes associated with `buffer'.
3856 If `buffer' is nil, kill all processes */
3859 kill_buffer_processes (buffer
)
3862 Lisp_Object tail
, proc
;
3864 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3866 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3867 if (GC_PROCESSP (proc
)
3868 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
3870 if (NETCONN_P (proc
))
3871 Fdelete_process (proc
);
3872 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
3873 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
3878 /* On receipt of a signal that a child status has changed,
3879 loop asking about children with changed statuses until
3880 the system says there are no more.
3881 All we do is change the status;
3882 we do not run sentinels or print notifications.
3883 That is saved for the next time keyboard input is done,
3884 in order to avoid timing errors. */
3886 /** WARNING: this can be called during garbage collection.
3887 Therefore, it must not be fooled by the presence of mark bits in
3890 /** USG WARNING: Although it is not obvious from the documentation
3891 in signal(2), on a USG system the SIGCLD handler MUST NOT call
3892 signal() before executing at least one wait(), otherwise the handler
3893 will be called again, resulting in an infinite loop. The relevant
3894 portion of the documentation reads "SIGCLD signals will be queued
3895 and the signal-catching function will be continually reentered until
3896 the queue is empty". Invoking signal() causes the kernel to reexamine
3897 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
3900 sigchld_handler (signo
)
3903 int old_errno
= errno
;
3905 register struct Lisp_Process
*p
;
3906 extern EMACS_TIME
*input_available_clear_time
;
3910 sigheld
|= sigbit (SIGCHLD
);
3922 #endif /* no WUNTRACED */
3923 /* Keep trying to get a status until we get a definitive result. */
3927 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
3929 while (pid
<= 0 && errno
== EINTR
);
3933 /* A real failure. We have done all our job, so return. */
3935 /* USG systems forget handlers when they are used;
3936 must reestablish each time */
3937 #if defined (USG) && !defined (POSIX_SIGNALS)
3938 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
3941 sigheld
&= ~sigbit (SIGCHLD
);
3949 #endif /* no WNOHANG */
3951 /* Find the process that signaled us, and record its status. */
3954 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3956 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3957 p
= XPROCESS (proc
);
3958 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
3963 /* Look for an asynchronous process whose pid hasn't been filled
3966 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3968 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3969 p
= XPROCESS (proc
);
3970 if (INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
3975 /* Change the status of the process that was found. */
3978 union { int i
; WAITTYPE wt
; } u
;
3979 int clear_desc_flag
= 0;
3981 XSETINT (p
->tick
, ++process_tick
);
3983 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
3984 XSETINT (p
->raw_status_high
, u
.i
>> 16);
3986 /* If process has terminated, stop waiting for its output. */
3987 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
3988 && XINT (p
->infd
) >= 0)
3989 clear_desc_flag
= 1;
3991 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
3992 if (clear_desc_flag
)
3994 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
3995 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
3998 /* Tell wait_reading_process_input that it needs to wake up and
4000 if (input_available_clear_time
)
4001 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
4004 /* There was no asynchronous process found for that id. Check
4005 if we have a synchronous process. */
4008 synch_process_alive
= 0;
4010 /* Report the status of the synchronous process. */
4012 synch_process_retcode
= WRETCODE (w
);
4013 else if (WIFSIGNALED (w
))
4015 int code
= WTERMSIG (w
);
4021 /* Suppress warning if the table has const char *. */
4022 signame
= (char *) sys_siglist
[code
];
4024 signame
= sys_errlist
[code
];
4028 signame
= "unknown";
4030 synch_process_death
= signame
;
4033 /* Tell wait_reading_process_input that it needs to wake up and
4035 if (input_available_clear_time
)
4036 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
4039 /* On some systems, we must return right away.
4040 If any more processes want to signal us, we will
4042 Otherwise (on systems that have WNOHANG), loop around
4043 to use up all the processes that have something to tell us. */
4044 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT)
4045 #if defined (USG) && ! defined (POSIX_SIGNALS)
4046 signal (signo
, sigchld_handler
);
4050 #endif /* USG, but not HPUX with WNOHANG */
4056 exec_sentinel_unwind (data
)
4059 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
4064 exec_sentinel_error_handler (error
)
4067 cmd_error_internal (error
, "error in process sentinel: ");
4069 update_echo_area ();
4070 Fsleep_for (make_number (2), Qnil
);
4074 exec_sentinel (proc
, reason
)
4075 Lisp_Object proc
, reason
;
4077 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
4078 register struct Lisp_Process
*p
= XPROCESS (proc
);
4079 int count
= specpdl_ptr
- specpdl
;
4080 int outer_running_asynch_code
= running_asynch_code
;
4082 /* No need to gcpro these, because all we do with them later
4083 is test them for EQness, and none of them should be a string. */
4084 odeactivate
= Vdeactivate_mark
;
4085 XSETBUFFER (obuffer
, current_buffer
);
4086 okeymap
= current_buffer
->keymap
;
4088 sentinel
= p
->sentinel
;
4089 if (NILP (sentinel
))
4092 /* Zilch the sentinel while it's running, to avoid recursive invocations;
4093 assure that it gets restored no matter how the sentinel exits. */
4095 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
4096 /* Inhibit quit so that random quits don't screw up a running filter. */
4097 specbind (Qinhibit_quit
, Qt
);
4098 specbind (Qlast_nonmenu_event
, Qt
);
4100 /* In case we get recursively called,
4101 and we already saved the match data nonrecursively,
4102 save the same match data in safely recursive fashion. */
4103 if (outer_running_asynch_code
)
4106 tem
= Fmatch_data (Qnil
, Qnil
);
4107 restore_match_data ();
4108 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
4109 Fset_match_data (tem
);
4112 /* For speed, if a search happens within this code,
4113 save the match data in a special nonrecursive fashion. */
4114 running_asynch_code
= 1;
4116 internal_condition_case_1 (read_process_output_call
,
4118 Fcons (proc
, Fcons (reason
, Qnil
))),
4119 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
4120 exec_sentinel_error_handler
);
4122 /* If we saved the match data nonrecursively, restore it now. */
4123 restore_match_data ();
4124 running_asynch_code
= outer_running_asynch_code
;
4126 Vdeactivate_mark
= odeactivate
;
4128 if (! EQ (Fcurrent_buffer (), obuffer
)
4129 || ! EQ (current_buffer
->keymap
, okeymap
))
4131 /* But do it only if the caller is actually going to read events.
4132 Otherwise there's no need to make him wake up, and it could
4133 cause trouble (for example it would make Fsit_for return). */
4134 if (waiting_for_user_input_p
== -1)
4135 record_asynch_buffer_change ();
4137 unbind_to (count
, Qnil
);
4140 /* Report all recent events of a change in process status
4141 (either run the sentinel or output a message).
4142 This is done while Emacs is waiting for keyboard input. */
4147 register Lisp_Object proc
, buffer
;
4148 Lisp_Object tail
, msg
;
4149 struct gcpro gcpro1
, gcpro2
;
4153 /* We need to gcpro tail; if read_process_output calls a filter
4154 which deletes a process and removes the cons to which tail points
4155 from Vprocess_alist, and then causes a GC, tail is an unprotected
4159 /* Set this now, so that if new processes are created by sentinels
4160 that we run, we get called again to handle their status changes. */
4161 update_tick
= process_tick
;
4163 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
4166 register struct Lisp_Process
*p
;
4168 proc
= Fcdr (Fcar (tail
));
4169 p
= XPROCESS (proc
);
4171 if (XINT (p
->tick
) != XINT (p
->update_tick
))
4173 XSETINT (p
->update_tick
, XINT (p
->tick
));
4175 /* If process is still active, read any output that remains. */
4176 while (! EQ (p
->filter
, Qt
)
4177 && XINT (p
->infd
) >= 0
4178 && read_process_output (proc
, XINT (p
->infd
)) > 0);
4182 /* Get the text to use for the message. */
4183 if (!NILP (p
->raw_status_low
))
4185 msg
= status_message (p
->status
);
4187 /* If process is terminated, deactivate it or delete it. */
4189 if (CONSP (p
->status
))
4190 symbol
= XCONS (p
->status
)->car
;
4192 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
4193 || EQ (symbol
, Qclosed
))
4195 if (delete_exited_processes
)
4196 remove_process (proc
);
4198 deactivate_process (proc
);
4201 /* The actions above may have further incremented p->tick.
4202 So set p->update_tick again
4203 so that an error in the sentinel will not cause
4204 this code to be run again. */
4205 XSETINT (p
->update_tick
, XINT (p
->tick
));
4206 /* Now output the message suitably. */
4207 if (!NILP (p
->sentinel
))
4208 exec_sentinel (proc
, msg
);
4209 /* Don't bother with a message in the buffer
4210 when a process becomes runnable. */
4211 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
4213 Lisp_Object ro
, tem
;
4214 struct buffer
*old
= current_buffer
;
4215 int opoint
, opoint_byte
;
4216 int before
, before_byte
;
4218 ro
= XBUFFER (buffer
)->read_only
;
4220 /* Avoid error if buffer is deleted
4221 (probably that's why the process is dead, too) */
4222 if (NILP (XBUFFER (buffer
)->name
))
4224 Fset_buffer (buffer
);
4227 opoint_byte
= PT_BYTE
;
4228 /* Insert new output into buffer
4229 at the current end-of-output marker,
4230 thus preserving logical ordering of input and output. */
4231 if (XMARKER (p
->mark
)->buffer
)
4232 Fgoto_char (p
->mark
);
4234 SET_PT_BOTH (ZV
, ZV_BYTE
);
4237 before_byte
= PT_BYTE
;
4239 tem
= current_buffer
->read_only
;
4240 current_buffer
->read_only
= Qnil
;
4241 insert_string ("\nProcess ");
4242 Finsert (1, &p
->name
);
4243 insert_string (" ");
4245 current_buffer
->read_only
= tem
;
4246 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
4248 if (opoint
>= before
)
4249 SET_PT_BOTH (opoint
+ (PT
- before
),
4250 opoint_byte
+ (PT_BYTE
- before_byte
));
4252 SET_PT_BOTH (opoint
, opoint_byte
);
4254 set_buffer_internal (old
);
4259 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
4260 redisplay_preserve_echo_area ();
4266 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
4267 Sset_process_coding_system
, 1, 3, 0,
4268 "Set coding systems of PROCESS to DECODING (input from the process) and\n\
4269 ENCODING (output to the process).")
4270 (proc
, decoding
, encoding
)
4271 register Lisp_Object proc
, decoding
, encoding
;
4273 register struct Lisp_Process
*p
;
4275 CHECK_PROCESS (proc
, 0);
4276 p
= XPROCESS (proc
);
4277 if (XINT (p
->infd
) < 0)
4278 error ("Input file descriptor of %s closed", XSTRING (p
->name
)->data
);
4279 if (XINT (p
->outfd
) < 0)
4280 error ("Output file descriptor of %s closed", XSTRING (p
->name
)->data
);
4282 p
->decode_coding_system
= Fcheck_coding_system (decoding
);
4283 p
->encode_coding_system
= Fcheck_coding_system (encoding
);
4284 setup_coding_system (decoding
,
4285 proc_decode_coding_system
[XINT (p
->infd
)]);
4286 setup_coding_system (encoding
,
4287 proc_encode_coding_system
[XINT (p
->outfd
)]);
4292 DEFUN ("process-coding-system",
4293 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
4294 "Return a cons of coding systems for decoding and encoding of PROCESS.")
4296 register Lisp_Object proc
;
4298 CHECK_PROCESS (proc
, 0);
4299 return Fcons (XPROCESS (proc
)->decode_coding_system
,
4300 XPROCESS (proc
)->encode_coding_system
);
4303 /* The first time this is called, assume keyboard input comes from DESC
4304 instead of from where we used to expect it.
4305 Subsequent calls mean assume input keyboard can come from DESC
4306 in addition to other places. */
4308 static int add_keyboard_wait_descriptor_called_flag
;
4311 add_keyboard_wait_descriptor (desc
)
4314 if (! add_keyboard_wait_descriptor_called_flag
)
4315 FD_CLR (0, &input_wait_mask
);
4316 add_keyboard_wait_descriptor_called_flag
= 1;
4317 FD_SET (desc
, &input_wait_mask
);
4318 FD_SET (desc
, &non_process_wait_mask
);
4319 if (desc
> max_keyboard_desc
)
4320 max_keyboard_desc
= desc
;
4323 /* From now on, do not expect DESC to give keyboard input. */
4326 delete_keyboard_wait_descriptor (desc
)
4330 int lim
= max_keyboard_desc
;
4332 FD_CLR (desc
, &input_wait_mask
);
4333 FD_CLR (desc
, &non_process_wait_mask
);
4335 if (desc
== max_keyboard_desc
)
4336 for (fd
= 0; fd
< lim
; fd
++)
4337 if (FD_ISSET (fd
, &input_wait_mask
)
4338 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
4339 max_keyboard_desc
= fd
;
4342 /* Return nonzero if *MASK has a bit set
4343 that corresponds to one of the keyboard input descriptors. */
4346 keyboard_bit_set (mask
)
4351 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
4352 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
4353 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
4366 if (! noninteractive
|| initialized
)
4368 signal (SIGCHLD
, sigchld_handler
);
4371 FD_ZERO (&input_wait_mask
);
4372 FD_ZERO (&non_keyboard_wait_mask
);
4373 FD_ZERO (&non_process_wait_mask
);
4374 max_process_desc
= 0;
4376 FD_SET (0, &input_wait_mask
);
4378 Vprocess_alist
= Qnil
;
4379 for (i
= 0; i
< MAXDESC
; i
++)
4381 chan_process
[i
] = Qnil
;
4382 proc_buffered_char
[i
] = -1;
4384 bzero (proc_decode_coding_system
, sizeof proc_decode_coding_system
);
4385 bzero (proc_encode_coding_system
, sizeof proc_encode_coding_system
);
4391 Qprocessp
= intern ("processp");
4392 staticpro (&Qprocessp
);
4393 Qrun
= intern ("run");
4395 Qstop
= intern ("stop");
4397 Qsignal
= intern ("signal");
4398 staticpro (&Qsignal
);
4400 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
4403 Qexit = intern ("exit");
4404 staticpro (&Qexit); */
4406 Qopen
= intern ("open");
4408 Qclosed
= intern ("closed");
4409 staticpro (&Qclosed
);
4411 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
4412 staticpro (&Qlast_nonmenu_event
);
4414 staticpro (&Vprocess_alist
);
4416 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
4417 "*Non-nil means delete processes immediately when they exit.\n\
4418 nil means don't delete them until `list-processes' is run.");
4420 delete_exited_processes
= 1;
4422 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
4423 "Control type of device used to communicate with subprocesses.\n\
4424 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
4425 The value has no effect if the system has no ptys or if all ptys are busy:\n\
4426 then a pipe is used in any case.\n\
4427 The value takes effect when `start-process' is called.");
4428 Vprocess_connection_type
= Qt
;
4430 defsubr (&Sprocessp
);
4431 defsubr (&Sget_process
);
4432 defsubr (&Sget_buffer_process
);
4433 defsubr (&Sdelete_process
);
4434 defsubr (&Sprocess_status
);
4435 defsubr (&Sprocess_exit_status
);
4436 defsubr (&Sprocess_id
);
4437 defsubr (&Sprocess_name
);
4438 defsubr (&Sprocess_tty_name
);
4439 defsubr (&Sprocess_command
);
4440 defsubr (&Sset_process_buffer
);
4441 defsubr (&Sprocess_buffer
);
4442 defsubr (&Sprocess_mark
);
4443 defsubr (&Sset_process_filter
);
4444 defsubr (&Sprocess_filter
);
4445 defsubr (&Sset_process_sentinel
);
4446 defsubr (&Sprocess_sentinel
);
4447 defsubr (&Sset_process_window_size
);
4448 defsubr (&Sset_process_inherit_coding_system_flag
);
4449 defsubr (&Sprocess_inherit_coding_system_flag
);
4450 defsubr (&Sprocess_kill_without_query
);
4451 defsubr (&Sprocess_contact
);
4452 defsubr (&Slist_processes
);
4453 defsubr (&Sprocess_list
);
4454 defsubr (&Sstart_process
);
4456 defsubr (&Sopen_network_stream
);
4457 #endif /* HAVE_SOCKETS */
4458 defsubr (&Saccept_process_output
);
4459 defsubr (&Sprocess_send_region
);
4460 defsubr (&Sprocess_send_string
);
4461 defsubr (&Sinterrupt_process
);
4462 defsubr (&Skill_process
);
4463 defsubr (&Squit_process
);
4464 defsubr (&Sstop_process
);
4465 defsubr (&Scontinue_process
);
4466 defsubr (&Sprocess_send_eof
);
4467 defsubr (&Ssignal_process
);
4468 defsubr (&Swaiting_for_user_input_p
);
4469 /* defsubr (&Sprocess_connection); */
4470 defsubr (&Sset_process_coding_system
);
4471 defsubr (&Sprocess_coding_system
);
4475 #else /* not subprocesses */
4477 #include <sys/types.h>
4481 #include "systime.h"
4482 #include "charset.h"
4484 #include "termopts.h"
4485 #include "sysselect.h"
4487 extern int frame_garbaged
;
4489 extern EMACS_TIME
timer_check ();
4490 extern int timers_run
;
4492 /* As described above, except assuming that there are no subprocesses:
4494 Wait for timeout to elapse and/or keyboard input to be available.
4497 timeout in seconds, or
4498 zero for no limit, or
4499 -1 means gobble data immediately available but don't wait for any.
4501 read_kbd is a Lisp_Object:
4502 0 to ignore keyboard input, or
4503 1 to return when input is available, or
4504 -1 means caller will actually read the input, so don't throw to
4506 a cons cell, meaning wait until its car is non-nil
4507 (and gobble terminal input into the buffer if any arrives), or
4508 We know that read_kbd will never be a Lisp_Process, since
4509 `subprocesses' isn't defined.
4511 do_display != 0 means redisplay should be done to show subprocess
4512 output that arrives.
4514 Return true iff we received input from any process. */
4517 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
4518 int time_limit
, microsecs
;
4519 Lisp_Object read_kbd
;
4522 EMACS_TIME end_time
, timeout
;
4523 SELECT_TYPE waitchannels
;
4525 Lisp_Object
*wait_for_cell
= 0;
4527 /* If waiting for non-nil in a cell, record where. */
4528 if (CONSP (read_kbd
))
4530 wait_for_cell
= &XCONS (read_kbd
)->car
;
4531 XSETFASTINT (read_kbd
, 0);
4534 /* What does time_limit really mean? */
4535 if (time_limit
|| microsecs
)
4537 if (time_limit
== -1)
4538 /* In fact, it's zero. */
4539 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4541 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4543 /* How far in the future is that? */
4544 EMACS_GET_TIME (end_time
);
4545 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4548 /* It's infinite. */
4549 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4551 /* Turn off periodic alarms (in case they are in use)
4552 because the select emulator uses alarms. */
4558 int timeout_reduced_for_timers
= 0;
4560 /* If calling from keyboard input, do not quit
4561 since we want to return C-g as an input character.
4562 Otherwise, do pending quit if requested. */
4563 if (XINT (read_kbd
) >= 0)
4566 /* Exit now if the cell we're waiting for became non-nil. */
4567 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
4570 /* Compute time from now till when time limit is up */
4571 /* Exit if already run out */
4572 if (time_limit
> 0 || microsecs
)
4574 EMACS_GET_TIME (timeout
);
4575 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4576 if (EMACS_TIME_NEG_P (timeout
))
4580 /* If our caller will not immediately handle keyboard events,
4581 run timer events directly.
4582 (Callers that will immediately read keyboard events
4583 call timer_delay on their own.) */
4584 if (! wait_for_cell
)
4586 EMACS_TIME timer_delay
;
4590 old_timers_run
= timers_run
;
4591 timer_delay
= timer_check (1);
4592 if (timers_run
!= old_timers_run
&& do_display
)
4594 redisplay_preserve_echo_area ();
4595 /* We must retry, since a timer may have requeued itself
4596 and that could alter the time delay. */
4600 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4602 EMACS_TIME difference
;
4603 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4604 if (EMACS_TIME_NEG_P (difference
))
4606 timeout
= timer_delay
;
4607 timeout_reduced_for_timers
= 1;
4612 /* Cause C-g and alarm signals to take immediate action,
4613 and cause input available signals to zero out timeout. */
4614 if (XINT (read_kbd
) < 0)
4615 set_waiting_for_input (&timeout
);
4617 /* Wait till there is something to do. */
4619 if (! XINT (read_kbd
) && wait_for_cell
== 0)
4620 FD_ZERO (&waitchannels
);
4622 FD_SET (0, &waitchannels
);
4624 /* If a frame has been newly mapped and needs updating,
4625 reprocess its display stuff. */
4626 if (frame_garbaged
&& do_display
)
4628 clear_waiting_for_input ();
4629 redisplay_preserve_echo_area ();
4630 if (XINT (read_kbd
) < 0)
4631 set_waiting_for_input (&timeout
);
4634 if (XINT (read_kbd
) && detect_input_pending ())
4637 FD_ZERO (&waitchannels
);
4640 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
4645 /* Make C-g and alarm signals set flags again */
4646 clear_waiting_for_input ();
4648 /* If we woke up due to SIGWINCH, actually change size now. */
4649 do_pending_window_change ();
4651 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4652 /* We waited the full specified time, so return now. */
4657 /* If the system call was interrupted, then go around the
4659 if (xerrno
== EINTR
)
4660 FD_ZERO (&waitchannels
);
4662 error ("select error: %s", strerror (xerrno
));
4665 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
4666 /* System sometimes fails to deliver SIGIO. */
4667 kill (getpid (), SIGIO
);
4670 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
4671 kill (getpid (), SIGIO
);
4674 /* Check for keyboard input */
4676 if ((XINT (read_kbd
) != 0)
4677 && detect_input_pending_run_timers (do_display
))
4679 swallow_events (do_display
);
4680 if (detect_input_pending_run_timers (do_display
))
4684 /* If wait_for_cell. check for keyboard input
4685 but don't run any timers.
4686 ??? (It seems wrong to me to check for keyboard
4687 input at all when wait_for_cell, but the code
4688 has been this way since July 1994.
4689 Try changing this after version 19.31.) */
4691 && detect_input_pending ())
4693 swallow_events (do_display
);
4694 if (detect_input_pending ())
4698 /* Exit now if the cell we're waiting for became non-nil. */
4699 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
4709 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
4710 /* Don't confuse make-docfile by having two doc strings for this function.
4711 make-docfile does not pay attention to #if, for good reason! */
4714 register Lisp_Object name
;
4719 DEFUN ("process-inherit-coding-system-flag",
4720 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
4722 /* Don't confuse make-docfile by having two doc strings for this function.
4723 make-docfile does not pay attention to #if, for good reason! */
4726 register Lisp_Object process
;
4728 /* Ignore the argument and return the value of
4729 inherit-process-coding-system. */
4730 return inherit_process_coding_system
? Qt
: Qnil
;
4733 /* Kill all processes associated with `buffer'.
4734 If `buffer' is nil, kill all processes.
4735 Since we have no subprocesses, this does nothing. */
4738 kill_buffer_processes (buffer
)
4751 defsubr (&Sget_buffer_process
);
4752 defsubr (&Sprocess_inherit_coding_system_flag
);
4756 #endif /* not subprocesses */