1 /* Asynchronous subprocess control for GNU Emacs.
2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 1996
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
27 /* This file is split into two parts by the following preprocessor
28 conditional. The 'then' clause contains all of the support for
29 asynchronous subprocesses. The 'else' clause contains stub
30 versions of some of the asynchronous subprocess routines that are
31 often called elsewhere in Emacs, so we don't have to #ifdef the
32 sections that call them. */
40 #include <sys/types.h> /* some typedefs are used in sys/file.h */
50 #endif /* not WINDOWSNT */
52 #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */
53 #include <sys/socket.h>
55 #include <netinet/in.h>
56 #include <arpa/inet.h>
57 #ifdef NEED_NET_ERRNO_H
58 #include <net/errno.h>
59 #endif /* NEED_NET_ERRNO_H */
60 #endif /* HAVE_SOCKETS */
62 /* TERM is a poor-man's SLIP, used on Linux. */
67 /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */
68 #ifdef HAVE_BROKEN_INET_ADDR
69 #define IN_ADDR struct in_addr
70 #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1)
72 #define IN_ADDR unsigned long
73 #define NUMERIC_ADDR_ERROR (numeric_addr == -1)
76 #if defined(BSD) || defined(STRIDE)
77 #include <sys/ioctl.h>
78 #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5)
80 #endif /* HAVE_PTYS and no O_NDELAY */
81 #endif /* BSD or STRIDE */
83 #ifdef BROKEN_O_NONBLOCK
85 #endif /* BROKEN_O_NONBLOCK */
92 #include <sys/sysmacros.h> /* for "minor" */
102 #include "termhooks.h"
103 #include "termopts.h"
104 #include "commands.h"
107 Lisp_Object Qprocessp
;
108 Lisp_Object Qrun
, Qstop
, Qsignal
, Qopen
, Qclosed
;
109 Lisp_Object Qlast_nonmenu_event
;
110 /* Qexit is declared and initialized in eval.c. */
112 /* a process object is a network connection when its childp field is neither
113 Qt nor Qnil but is instead a string (name of foreign host we
114 are connected to + name of port we are connected to) */
117 static Lisp_Object stream_process
;
119 #define NETCONN_P(p) (GC_STRINGP (XPROCESS (p)->childp))
121 #define NETCONN_P(p) 0
122 #endif /* HAVE_SOCKETS */
124 /* Define first descriptor number available for subprocesses. */
126 #define FIRST_PROC_DESC 1
128 #define FIRST_PROC_DESC 3
131 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
134 #if !defined (SIGCHLD) && defined (SIGCLD)
135 #define SIGCHLD SIGCLD
138 #include "syssignal.h"
143 extern char *strerror ();
145 extern char *sys_errlist
[];
152 #ifndef SYS_SIGLIST_DECLARED
157 extern char *sys_siglist
[];
158 #endif /* not LINUX */
160 char *sys_siglist
[] =
166 "illegal instruction",
170 "floating point exception",
173 "segmentation violation",
174 "bad argument to system call",
175 "write on a pipe with no one to read it",
177 "software termination signal from kill",
179 "sendable stop signal not from tty",
180 "stop signal from tty",
181 "continue a stopped process",
182 "child status has changed",
183 "background read attempted from control tty",
184 "background write attempted from control tty",
185 "input record available at control tty",
186 "exceeded CPU time limit",
187 "exceeded file size limit"
189 #endif /* not WINDOWSNT */
192 #endif /* ! SYS_SIGLIST_DECLARED */
194 /* t means use pty, nil means use a pipe,
195 maybe other values to come. */
196 static Lisp_Object Vprocess_connection_type
;
200 #include <sys/socket.h>
204 /* These next two vars are non-static since sysdep.c uses them in the
205 emulation of `select'. */
206 /* Number of events of change of status of a process. */
208 /* Number of events for which the user or sentinel has been notified. */
211 #include "sysselect.h"
213 /* If we support a window system, turn on the code to poll periodically
214 to detect C-g. It isn't actually used when doing interrupt input. */
215 #ifdef HAVE_WINDOW_SYSTEM
216 #define POLL_FOR_INPUT
219 /* Mask of bits indicating the descriptors that we wait for input on. */
221 static SELECT_TYPE input_wait_mask
;
223 /* Mask that excludes keyboard input descriptor (s). */
225 static SELECT_TYPE non_keyboard_wait_mask
;
227 /* The largest descriptor currently in use for a process object. */
228 static int max_process_desc
;
230 /* The largest descriptor currently in use for keyboard input. */
231 static int max_keyboard_desc
;
233 /* Nonzero means delete a process right away if it exits. */
234 static int delete_exited_processes
;
236 /* Indexed by descriptor, gives the process (if any) for that descriptor */
237 Lisp_Object chan_process
[MAXDESC
];
239 /* Alist of elements (NAME . PROCESS) */
240 Lisp_Object Vprocess_alist
;
242 /* Buffered-ahead input char from process, indexed by channel.
243 -1 means empty (no char is buffered).
244 Used on sys V where the only way to tell if there is any
245 output from the process is to read at least one char.
246 Always -1 on systems that support FIONREAD. */
248 /* Don't make static; need to access externally. */
249 int proc_buffered_char
[MAXDESC
];
251 static Lisp_Object
get_process ();
253 extern EMACS_TIME
timer_check ();
254 extern int timers_run
;
256 /* Maximum number of bytes to send to a pty without an eof. */
257 static int pty_max_bytes
;
260 /* The file name of the pty opened by allocate_pty. */
262 static char pty_name
[24];
265 /* Compute the Lisp form of the process status, p->status, from
266 the numeric status that was returned by `wait'. */
268 Lisp_Object
status_convert ();
271 struct Lisp_Process
*p
;
273 union { int i
; WAITTYPE wt
; } u
;
274 u
.i
= XFASTINT (p
->raw_status_low
) + (XFASTINT (p
->raw_status_high
) << 16);
275 p
->status
= status_convert (u
.wt
);
276 p
->raw_status_low
= Qnil
;
277 p
->raw_status_high
= Qnil
;
280 /* Convert a process status word in Unix format to
281 the list that we use internally. */
288 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
289 else if (WIFEXITED (w
))
290 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
291 WCOREDUMP (w
) ? Qt
: Qnil
));
292 else if (WIFSIGNALED (w
))
293 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
294 WCOREDUMP (w
) ? Qt
: Qnil
));
299 /* Given a status-list, extract the three pieces of information
300 and store them individually through the three pointers. */
303 decode_status (l
, symbol
, code
, coredump
)
319 *symbol
= XCONS (l
)->car
;
320 tem
= XCONS (l
)->cdr
;
321 *code
= XFASTINT (XCONS (tem
)->car
);
322 tem
= XCONS (tem
)->cdr
;
323 *coredump
= !NILP (tem
);
327 /* Return a string describing a process status list. */
330 status_message (status
)
335 Lisp_Object string
, string2
;
337 decode_status (status
, &symbol
, &code
, &coredump
);
339 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
345 /* Cast to suppress warning if the table has const char *. */
346 signame
= (char *) sys_siglist
[code
];
348 signame
= sys_errlist
[code
];
353 string
= build_string (signame
);
354 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
355 XSTRING (string
)->data
[0] = DOWNCASE (XSTRING (string
)->data
[0]);
356 return concat2 (string
, string2
);
358 else if (EQ (symbol
, Qexit
))
361 return build_string ("finished\n");
362 string
= Fnumber_to_string (make_number (code
));
363 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
364 return concat2 (build_string ("exited abnormally with code "),
365 concat2 (string
, string2
));
368 return Fcopy_sequence (Fsymbol_name (symbol
));
373 /* Open an available pty, returning a file descriptor.
374 Return -1 on failure.
375 The file name of the terminal corresponding to the pty
376 is left in the variable pty_name. */
385 /* Some systems name their pseudoterminals so that there are gaps in
386 the usual sequence - for example, on HP9000/S700 systems, there
387 are no pseudoterminals with names ending in 'f'. So we wait for
388 three failures in a row before deciding that we've reached the
390 int failed_count
= 0;
395 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
396 for (i
= 0; i
< 16; i
++)
399 #ifdef PTY_NAME_SPRINTF
402 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
403 #endif /* no PTY_NAME_SPRINTF */
407 #else /* no PTY_OPEN */
409 /* Unusual IRIS code */
410 *ptyv
= open ("/dev/ptc", O_RDWR
| O_NDELAY
, 0);
413 if (fstat (fd
, &stb
) < 0)
416 if (stat (pty_name
, &stb
) < 0)
419 if (failed_count
>= 3)
425 fd
= open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
427 fd
= open (pty_name
, O_RDWR
| O_NDELAY
, 0);
429 #endif /* not IRIS */
430 #endif /* no PTY_OPEN */
434 /* check to make certain that both sides are available
435 this avoids a nasty yet stupid bug in rlogins */
436 #ifdef PTY_TTY_NAME_SPRINTF
439 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
440 #endif /* no PTY_TTY_NAME_SPRINTF */
442 if (access (pty_name
, 6) != 0)
445 #if !defined(IRIS) && !defined(__sgi)
451 #endif /* not UNIPLUS */
458 #endif /* HAVE_PTYS */
464 struct Lisp_Vector
*vec
;
465 register Lisp_Object val
, tem
, name1
;
466 register struct Lisp_Process
*p
;
470 vec
= allocate_vectorlike ((EMACS_INT
) VECSIZE (struct Lisp_Process
));
471 for (i
= 0; i
< VECSIZE (struct Lisp_Process
); i
++)
472 vec
->contents
[i
] = Qnil
;
473 vec
->size
= VECSIZE (struct Lisp_Process
);
474 p
= (struct Lisp_Process
*)vec
;
476 XSETINT (p
->infd
, -1);
477 XSETINT (p
->outfd
, -1);
478 XSETFASTINT (p
->pid
, 0);
479 XSETFASTINT (p
->tick
, 0);
480 XSETFASTINT (p
->update_tick
, 0);
481 p
->raw_status_low
= Qnil
;
482 p
->raw_status_high
= Qnil
;
484 p
->mark
= Fmake_marker ();
486 /* If name is already in use, modify it until it is unused. */
491 tem
= Fget_process (name1
);
492 if (NILP (tem
)) break;
493 sprintf (suffix
, "<%d>", i
);
494 name1
= concat2 (name
, build_string (suffix
));
498 XSETPROCESS (val
, p
);
499 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
503 remove_process (proc
)
504 register Lisp_Object proc
;
506 register Lisp_Object pair
;
508 pair
= Frassq (proc
, Vprocess_alist
);
509 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
511 deactivate_process (proc
);
514 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
515 "Return t if OBJECT is a process.")
519 return PROCESSP (object
) ? Qt
: Qnil
;
522 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
523 "Return the process named NAME, or nil if there is none.")
525 register Lisp_Object name
;
529 CHECK_STRING (name
, 0);
530 return Fcdr (Fassoc (name
, Vprocess_alist
));
533 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
534 "Return the (or, a) process associated with BUFFER.\n\
535 BUFFER may be a buffer or the name of one.")
537 register Lisp_Object buffer
;
539 register Lisp_Object buf
, tail
, proc
;
541 if (NILP (buffer
)) return Qnil
;
542 buf
= Fget_buffer (buffer
);
543 if (NILP (buf
)) return Qnil
;
545 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
547 proc
= Fcdr (Fcar (tail
));
548 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
554 /* This is how commands for the user decode process arguments. It
555 accepts a process, a process name, a buffer, a buffer name, or nil.
556 Buffers denote the first process in the buffer, and nil denotes the
561 register Lisp_Object name
;
563 register Lisp_Object proc
, obj
;
566 obj
= Fget_process (name
);
568 obj
= Fget_buffer (name
);
570 error ("Process %s does not exist", XSTRING (name
)->data
);
572 else if (NILP (name
))
573 obj
= Fcurrent_buffer ();
577 /* Now obj should be either a buffer object or a process object.
581 proc
= Fget_buffer_process (obj
);
583 error ("Buffer %s has no process", XSTRING (XBUFFER (obj
)->name
)->data
);
587 CHECK_PROCESS (obj
, 0);
593 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
594 "Delete PROCESS: kill it and forget about it immediately.\n\
595 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
596 nil, indicating the current buffer's process.")
598 register Lisp_Object process
;
600 process
= get_process (process
);
601 XPROCESS (process
)->raw_status_low
= Qnil
;
602 XPROCESS (process
)->raw_status_high
= Qnil
;
603 if (NETCONN_P (process
))
605 XPROCESS (process
)->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
606 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
608 else if (XINT (XPROCESS (process
)->infd
) >= 0)
610 Fkill_process (process
, Qnil
);
611 /* Do this now, since remove_process will make sigchld_handler do nothing. */
612 XPROCESS (process
)->status
613 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
614 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
617 remove_process (process
);
621 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
622 "Return the status of PROCESS: a symbol, one of these:\n\
623 run -- for a process that is running.\n\
624 stop -- for a process stopped but continuable.\n\
625 exit -- for a process that has exited.\n\
626 signal -- for a process that has got a fatal signal.\n\
627 open -- for a network stream connection that is open.\n\
628 closed -- for a network stream connection that is closed.\n\
629 nil -- if arg is a process name and no such process exists.\n\
630 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
631 nil, indicating the current buffer's process.")
633 register Lisp_Object process
;
635 register struct Lisp_Process
*p
;
636 register Lisp_Object status
;
638 if (STRINGP (process
))
639 process
= Fget_process (process
);
641 process
= get_process (process
);
646 p
= XPROCESS (process
);
647 if (!NILP (p
->raw_status_low
))
651 status
= XCONS (status
)->car
;
652 if (NETCONN_P (process
))
654 if (EQ (status
, Qrun
))
656 else if (EQ (status
, Qexit
))
662 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
664 "Return the exit status of PROCESS or the signal number that killed it.\n\
665 If PROCESS has not yet exited or died, return 0.")
667 register Lisp_Object process
;
669 CHECK_PROCESS (process
, 0);
670 if (!NILP (XPROCESS (process
)->raw_status_low
))
671 update_status (XPROCESS (process
));
672 if (CONSP (XPROCESS (process
)->status
))
673 return XCONS (XCONS (XPROCESS (process
)->status
)->cdr
)->car
;
674 return make_number (0);
677 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
678 "Return the process id of PROCESS.\n\
679 This is the pid of the Unix process which PROCESS uses or talks to.\n\
680 For a network connection, this value is nil.")
682 register Lisp_Object process
;
684 CHECK_PROCESS (process
, 0);
685 return XPROCESS (process
)->pid
;
688 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
689 "Return the name of PROCESS, as a string.\n\
690 This is the name of the program invoked in PROCESS,\n\
691 possibly modified to make it unique among process names.")
693 register Lisp_Object process
;
695 CHECK_PROCESS (process
, 0);
696 return XPROCESS (process
)->name
;
699 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
700 "Return the command that was executed to start PROCESS.\n\
701 This is a list of strings, the first string being the program executed\n\
702 and the rest of the strings being the arguments given to it.\n\
703 For a non-child channel, this is nil.")
705 register Lisp_Object process
;
707 CHECK_PROCESS (process
, 0);
708 return XPROCESS (process
)->command
;
711 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
712 "Return the name of the terminal PROCESS uses, or nil if none.\n\
713 This is the terminal that the process itself reads and writes on,\n\
714 not the name of the pty that Emacs uses to talk with that terminal.")
716 register Lisp_Object process
;
718 CHECK_PROCESS (process
, 0);
719 return XPROCESS (process
)->tty_name
;
722 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
724 "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).")
726 register Lisp_Object process
, buffer
;
728 CHECK_PROCESS (process
, 0);
730 CHECK_BUFFER (buffer
, 1);
731 XPROCESS (process
)->buffer
= buffer
;
735 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
737 "Return the buffer PROCESS is associated with.\n\
738 Output from PROCESS is inserted in this buffer\n\
739 unless PROCESS has a filter.")
741 register Lisp_Object process
;
743 CHECK_PROCESS (process
, 0);
744 return XPROCESS (process
)->buffer
;
747 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
749 "Return the marker for the end of the last output from PROCESS.")
751 register Lisp_Object process
;
753 CHECK_PROCESS (process
, 0);
754 return XPROCESS (process
)->mark
;
757 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
759 "Give PROCESS the filter function FILTER; nil means no filter.\n\
760 t means stop accepting output from the process.\n\
761 When a process has a filter, each time it does output\n\
762 the entire string of output is passed to the filter.\n\
763 The filter gets two arguments: the process and the string of output.\n\
764 If the process has a filter, its buffer is not used for output.")
766 register Lisp_Object process
, filter
;
768 CHECK_PROCESS (process
, 0);
771 FD_CLR (XINT (XPROCESS (process
)->infd
), &input_wait_mask
);
772 FD_CLR (XINT (XPROCESS (process
)->infd
), &non_keyboard_wait_mask
);
774 else if (EQ (XPROCESS (process
)->filter
, Qt
))
776 FD_SET (XINT (XPROCESS (process
)->infd
), &input_wait_mask
);
777 FD_SET (XINT (XPROCESS (process
)->infd
), &non_keyboard_wait_mask
);
779 XPROCESS (process
)->filter
= filter
;
783 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
785 "Returns the filter function of PROCESS; nil if none.\n\
786 See `set-process-filter' for more info on filter functions.")
788 register Lisp_Object process
;
790 CHECK_PROCESS (process
, 0);
791 return XPROCESS (process
)->filter
;
794 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
796 "Give PROCESS the sentinel SENTINEL; nil for none.\n\
797 The sentinel is called as a function when the process changes state.\n\
798 It gets two arguments: the process, and a string describing the change.")
800 register Lisp_Object process
, sentinel
;
802 CHECK_PROCESS (process
, 0);
803 XPROCESS (process
)->sentinel
= sentinel
;
807 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
809 "Return the sentinel of PROCESS; nil if none.\n\
810 See `set-process-sentinel' for more info on sentinels.")
812 register Lisp_Object process
;
814 CHECK_PROCESS (process
, 0);
815 return XPROCESS (process
)->sentinel
;
818 DEFUN ("set-process-window-size", Fset_process_window_size
,
819 Sset_process_window_size
, 3, 3, 0,
820 "Tell PROCESS that it has logical window size HEIGHT and WIDTH.")
821 (process
, height
, width
)
822 register Lisp_Object process
, height
, width
;
824 CHECK_PROCESS (process
, 0);
825 CHECK_NATNUM (height
, 0);
826 CHECK_NATNUM (width
, 0);
827 if (set_window_size (XINT (XPROCESS (process
)->infd
),
828 XINT (height
), XINT(width
)) <= 0)
834 DEFUN ("process-kill-without-query", Fprocess_kill_without_query
,
835 Sprocess_kill_without_query
, 1, 2, 0,
836 "Say no query needed if PROCESS is running when Emacs is exited.\n\
837 Optional second argument if non-nil says to require a query.\n\
838 Value is t if a query was formerly required.")
840 register Lisp_Object process
, value
;
844 CHECK_PROCESS (process
, 0);
845 tem
= XPROCESS (process
)->kill_without_query
;
846 XPROCESS (process
)->kill_without_query
= Fnull (value
);
851 #if 0 /* Turned off because we don't currently record this info
852 in the process. Perhaps add it. */
853 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
854 "Return the connection type of `PROCESS'.\n\
855 The value is `nil' for a pipe,\n\
856 `t' or `pty' for a pty, or `stream' for a socket connection.")
860 return XPROCESS (process
)->type
;
867 register Lisp_Object tail
, tem
;
868 Lisp_Object proc
, minspace
, tem1
;
869 register struct buffer
*old
= current_buffer
;
870 register struct Lisp_Process
*p
;
874 XSETFASTINT (minspace
, 1);
876 set_buffer_internal (XBUFFER (Vstandard_output
));
877 Fbuffer_disable_undo (Vstandard_output
);
879 current_buffer
->truncate_lines
= Qt
;
882 Proc Status Buffer Tty Command\n\
883 ---- ------ ------ --- -------\n", -1);
885 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
889 proc
= Fcdr (Fcar (tail
));
891 if (NILP (p
->childp
))
894 Finsert (1, &p
->name
);
895 Findent_to (make_number (13), minspace
);
897 if (!NILP (p
->raw_status_low
))
900 if (CONSP (p
->status
))
901 symbol
= XCONS (p
->status
)->car
;
904 if (EQ (symbol
, Qsignal
))
907 tem
= Fcar (Fcdr (p
->status
));
909 if (XINT (tem
) < NSIG
)
910 write_string (sys_errlist
[XINT (tem
)], -1);
913 Fprinc (symbol
, Qnil
);
915 else if (NETCONN_P (proc
))
917 if (EQ (symbol
, Qrun
))
918 write_string ("open", -1);
919 else if (EQ (symbol
, Qexit
))
920 write_string ("closed", -1);
922 Fprinc (symbol
, Qnil
);
925 Fprinc (symbol
, Qnil
);
927 if (EQ (symbol
, Qexit
))
930 tem
= Fcar (Fcdr (p
->status
));
933 sprintf (tembuf
, " %d", (int) XFASTINT (tem
));
934 write_string (tembuf
, -1);
938 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
939 remove_process (proc
);
941 Findent_to (make_number (22), minspace
);
942 if (NILP (p
->buffer
))
943 insert_string ("(none)");
944 else if (NILP (XBUFFER (p
->buffer
)->name
))
945 insert_string ("(Killed)");
947 Finsert (1, &XBUFFER (p
->buffer
)->name
);
949 Findent_to (make_number (37), minspace
);
951 if (STRINGP (p
->tty_name
))
952 Finsert (1, &p
->tty_name
);
954 insert_string ("(none)");
956 Findent_to (make_number (49), minspace
);
958 if (NETCONN_P (proc
))
960 sprintf (tembuf
, "(network stream connection to %s)\n",
961 XSTRING (p
->childp
)->data
);
962 insert_string (tembuf
);
976 insert_string ("\n");
982 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 0, "",
983 "Display a list of all processes.\n\
984 \(Any processes listed as Exited or Signaled are actually eliminated\n\
985 after the listing is made.)")
988 internal_with_output_to_temp_buffer ("*Process List*",
989 list_processes_1
, Qnil
);
993 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
994 "Return a list of all processes.")
997 return Fmapcar (Qcdr
, Vprocess_alist
);
1000 /* Starting asynchronous inferior processes. */
1002 static Lisp_Object
start_process_unwind ();
1004 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1005 "Start a program in a subprocess. Return the process object for it.\n\
1006 Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\
1007 NAME is name for process. It is modified if necessary to make it unique.\n\
1008 BUFFER is the buffer or (buffer-name) to associate with the process.\n\
1009 Process output goes at end of that buffer, unless you specify\n\
1010 an output stream or filter function to handle the output.\n\
1011 BUFFER may be also nil, meaning that this process is not associated\n\
1013 Third arg is program file name. It is searched for as in the shell.\n\
1014 Remaining arguments are strings to give program as arguments.")
1017 register Lisp_Object
*args
;
1019 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1021 register unsigned char *new_argv
;
1024 register unsigned char **new_argv
;
1027 int count
= specpdl_ptr
- specpdl
;
1031 buffer
= Fget_buffer_create (buffer
);
1033 /* Make sure that the child will be able to chdir to the current
1034 buffer's current directory, or its unhandled equivalent. We
1035 can't just have the child check for an error when it does the
1036 chdir, since it's in a vfork.
1038 We have to GCPRO around this because Fexpand_file_name and
1039 Funhandled_file_name_directory might call a file name handling
1040 function. The argument list is protected by the caller, so all
1041 we really have to worry about is buffer. */
1043 struct gcpro gcpro1
, gcpro2
;
1045 current_dir
= current_buffer
->directory
;
1047 GCPRO2 (buffer
, current_dir
);
1050 = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir
),
1052 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1053 report_file_error ("Setting current directory",
1054 Fcons (current_buffer
->directory
, Qnil
));
1060 CHECK_STRING (name
, 0);
1064 CHECK_STRING (program
, 2);
1067 /* Make a one member argv with all args concatenated
1068 together separated by a blank. */
1069 len
= XSTRING (program
)->size
+ 2;
1070 for (i
= 3; i
< nargs
; i
++)
1073 CHECK_STRING (tem
, i
);
1074 len
+= XSTRING (tem
)->size
+ 1; /* count the blank */
1076 new_argv
= (unsigned char *) alloca (len
);
1077 strcpy (new_argv
, XSTRING (program
)->data
);
1078 for (i
= 3; i
< nargs
; i
++)
1081 CHECK_STRING (tem
, i
);
1082 strcat (new_argv
, " ");
1083 strcat (new_argv
, XSTRING (tem
)->data
);
1085 /* Need to add code here to check for program existence on VMS */
1088 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1090 /* If program file name is not absolute, search our path for it */
1091 if (!IS_DIRECTORY_SEP (XSTRING (program
)->data
[0])
1092 && !(XSTRING (program
)->size
> 1
1093 && IS_DEVICE_SEP (XSTRING (program
)->data
[1])))
1095 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1098 GCPRO4 (name
, program
, buffer
, current_dir
);
1099 openp (Vexec_path
, program
, EXEC_SUFFIXES
, &tem
, 1);
1102 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1103 tem
= Fexpand_file_name (tem
, Qnil
);
1104 new_argv
[0] = XSTRING (tem
)->data
;
1108 if (!NILP (Ffile_directory_p (program
)))
1109 error ("Specified program for new process is a directory");
1111 new_argv
[0] = XSTRING (program
)->data
;
1114 for (i
= 3; i
< nargs
; i
++)
1117 CHECK_STRING (tem
, i
);
1118 new_argv
[i
- 2] = XSTRING (tem
)->data
;
1120 new_argv
[i
- 2] = 0;
1121 #endif /* not VMS */
1123 proc
= make_process (name
);
1124 /* If an error occurs and we can't start the process, we want to
1125 remove it from the process list. This means that each error
1126 check in create_process doesn't need to call remove_process
1127 itself; it's all taken care of here. */
1128 record_unwind_protect (start_process_unwind
, proc
);
1130 XPROCESS (proc
)->childp
= Qt
;
1131 XPROCESS (proc
)->command_channel_p
= Qnil
;
1132 XPROCESS (proc
)->buffer
= buffer
;
1133 XPROCESS (proc
)->sentinel
= Qnil
;
1134 XPROCESS (proc
)->filter
= Qnil
;
1135 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1137 /* Make the process marker point into the process buffer (if any). */
1139 Fset_marker (XPROCESS (proc
)->mark
,
1140 make_number (BUF_ZV (XBUFFER (buffer
))), buffer
);
1142 create_process (proc
, new_argv
, current_dir
);
1144 return unbind_to (count
, proc
);
1147 /* This function is the unwind_protect form for Fstart_process. If
1148 PROC doesn't have its pid set, then we know someone has signaled
1149 an error and the process wasn't started successfully, so we should
1150 remove it from the process list. */
1152 start_process_unwind (proc
)
1155 if (!PROCESSP (proc
))
1158 /* Was PROC started successfully? */
1159 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1160 remove_process (proc
);
1167 create_process_1 (signo
)
1171 /* USG systems forget handlers when they are used;
1172 must reestablish each time */
1173 signal (signo
, create_process_1
);
1177 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1180 /* Mimic blocking of signals on system V, which doesn't really have it. */
1182 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1183 int sigchld_deferred
;
1186 create_process_sigchld ()
1188 signal (SIGCHLD
, create_process_sigchld
);
1190 sigchld_deferred
= 1;
1196 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1197 create_process (process
, new_argv
, current_dir
)
1198 Lisp_Object process
;
1200 Lisp_Object current_dir
;
1202 int pid
, inchannel
, outchannel
;
1204 #ifdef POSIX_SIGNALS
1207 struct sigaction sigint_action
;
1208 struct sigaction sigquit_action
;
1210 struct sigaction sighup_action
;
1212 #else /* !POSIX_SIGNALS */
1214 SIGTYPE (*sigchld
)();
1216 #endif /* !POSIX_SIGNALS */
1217 /* Use volatile to protect variables from being clobbered by longjmp. */
1218 volatile int forkin
, forkout
;
1219 volatile int pty_flag
= 0;
1220 extern char **environ
;
1222 inchannel
= outchannel
= -1;
1225 if (!NILP (Vprocess_connection_type
))
1226 outchannel
= inchannel
= allocate_pty ();
1231 /* On USG systems it does not work to open the pty's tty here
1232 and then close and reopen it in the child. */
1234 /* Don't let this terminal become our controlling terminal
1235 (in case we don't have one). */
1236 forkout
= forkin
= open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1238 forkout
= forkin
= open (pty_name
, O_RDWR
, 0);
1241 report_file_error ("Opening pty", Qnil
);
1243 forkin
= forkout
= -1;
1244 #endif /* not USG */
1248 #endif /* HAVE_PTYS */
1251 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1252 report_file_error ("Opening socketpair", Qnil
);
1253 outchannel
= inchannel
= sv
[0];
1254 forkout
= forkin
= sv
[1];
1256 #else /* not SKTPAIR */
1265 #endif /* not SKTPAIR */
1268 /* Replaced by close_process_descs */
1269 set_exclusive_use (inchannel
);
1270 set_exclusive_use (outchannel
);
1273 /* Stride people say it's a mystery why this is needed
1274 as well as the O_NDELAY, but that it fails without this. */
1275 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1278 ioctl (inchannel
, FIONBIO
, &one
);
1283 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1284 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1287 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1288 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1292 /* Record this as an active process, with its channels.
1293 As a result, child_setup will close Emacs's side of the pipes. */
1294 chan_process
[inchannel
] = process
;
1295 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1296 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1297 /* Record the tty descriptor used in the subprocess. */
1299 XPROCESS (process
)->subtty
= Qnil
;
1301 XSETFASTINT (XPROCESS (process
)->subtty
, forkin
);
1302 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1303 XPROCESS (process
)->status
= Qrun
;
1305 /* Delay interrupts until we have a chance to store
1306 the new fork's pid in its process structure */
1307 #ifdef POSIX_SIGNALS
1308 sigemptyset (&blocked
);
1310 sigaddset (&blocked
, SIGCHLD
);
1313 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1314 this sets the parent's signal handlers as well as the child's.
1315 So delay all interrupts whose handlers the child might munge,
1316 and record the current handlers so they can be restored later. */
1317 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1318 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1320 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1322 #endif /* HAVE_VFORK */
1323 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1324 #else /* !POSIX_SIGNALS */
1328 #else /* not BSD4_1 */
1329 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1330 sigsetmask (sigmask (SIGCHLD
));
1331 #else /* ordinary USG */
1333 sigchld_deferred
= 0;
1334 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1336 #endif /* ordinary USG */
1337 #endif /* not BSD4_1 */
1338 #endif /* SIGCHLD */
1339 #endif /* !POSIX_SIGNALS */
1341 FD_SET (inchannel
, &input_wait_mask
);
1342 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1343 if (inchannel
> max_process_desc
)
1344 max_process_desc
= inchannel
;
1346 /* Until we store the proper pid, enable sigchld_handler
1347 to recognize an unknown pid as standing for this process.
1348 It is very important not to let this `marker' value stay
1349 in the table after this function has returned; if it does
1350 it might cause call-process to hang and subsequent asynchronous
1351 processes to get their return values scrambled. */
1352 XSETINT (XPROCESS (process
)->pid
, -1);
1355 /* child_setup must clobber environ on systems with true vfork.
1356 Protect it from permanent change. */
1357 char **save_environ
= environ
;
1362 #endif /* not WINDOWSNT */
1364 int xforkin
= forkin
;
1365 int xforkout
= forkout
;
1367 #if 0 /* This was probably a mistake--it duplicates code later on,
1368 but fails to handle all the cases. */
1369 /* Make sure SIGCHLD is not blocked in the child. */
1370 sigsetmask (SIGEMPTYMASK
);
1373 /* Make the pty be the controlling terminal of the process. */
1375 /* First, disconnect its current controlling terminal. */
1377 /* We tried doing setsid only if pty_flag, but it caused
1378 process_set_signal to fail on SGI when using a pipe. */
1380 /* Make the pty's terminal the controlling terminal. */
1384 /* We ignore the return value
1385 because faith@cs.unc.edu says that is necessary on Linux. */
1386 ioctl (xforkin
, TIOCSCTTY
, 0);
1389 #else /* not HAVE_SETSID */
1391 /* It's very important to call setpgrp here and no time
1392 afterwards. Otherwise, we lose our controlling tty which
1393 is set when we open the pty. */
1396 #endif /* not HAVE_SETSID */
1397 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1398 if (pty_flag
&& xforkin
>= 0)
1401 tcgetattr (xforkin
, &t
);
1403 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1404 write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1407 #if defined (NTTYDISC) && defined (TIOCSETD)
1408 if (pty_flag
&& xforkin
>= 0)
1410 /* Use new line discipline. */
1411 int ldisc
= NTTYDISC
;
1412 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1417 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1418 can do TIOCSPGRP only to the process's controlling tty. */
1421 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1422 I can't test it since I don't have 4.3. */
1423 int j
= open ("/dev/tty", O_RDWR
, 0);
1424 ioctl (j
, TIOCNOTTY
, 0);
1427 /* In order to get a controlling terminal on some versions
1428 of BSD, it is necessary to put the process in pgrp 0
1429 before it opens the terminal. */
1437 #endif /* TIOCNOTTY */
1439 #if !defined (RTU) && !defined (UNIPLUS)
1440 /*** There is a suggestion that this ought to be a
1441 conditional on TIOCSPGRP. */
1442 /* Now close the pty (if we had it open) and reopen it.
1443 This makes the pty the controlling terminal of the subprocess. */
1446 #ifdef SET_CHILD_PTY_PGRP
1447 int pgrp
= getpid ();
1450 /* I wonder if close (open (pty_name, ...)) would work? */
1453 xforkout
= xforkin
= open (pty_name
, O_RDWR
, 0);
1457 write (1, "Couldn't open the pty terminal ", 31);
1458 write (1, pty_name
, strlen (pty_name
));
1463 #ifdef SET_CHILD_PTY_PGRP
1464 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1465 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1468 #endif /* not UNIPLUS and not RTU */
1469 #ifdef SETUP_SLAVE_PTY
1474 #endif /* SETUP_SLAVE_PTY */
1476 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1477 Now reenable it in the child, so it will die when we want it to. */
1479 signal (SIGHUP
, SIG_DFL
);
1481 #endif /* HAVE_PTYS */
1483 signal (SIGINT
, SIG_DFL
);
1484 signal (SIGQUIT
, SIG_DFL
);
1486 /* Stop blocking signals in the child. */
1487 #ifdef POSIX_SIGNALS
1488 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1489 #else /* !POSIX_SIGNALS */
1493 #else /* not BSD4_1 */
1494 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1495 sigsetmask (SIGEMPTYMASK
);
1496 #else /* ordinary USG */
1498 signal (SIGCHLD
, sigchld
);
1500 #endif /* ordinary USG */
1501 #endif /* not BSD4_1 */
1502 #endif /* SIGCHLD */
1503 #endif /* !POSIX_SIGNALS */
1506 child_setup_tty (xforkout
);
1508 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1509 new_argv
, 1, current_dir
);
1510 #else /* not WINDOWSNT */
1511 child_setup (xforkin
, xforkout
, xforkout
,
1512 new_argv
, 1, current_dir
);
1513 #endif /* not WINDOWSNT */
1515 environ
= save_environ
;
1518 /* This runs in the Emacs process. */
1523 if (forkin
!= forkout
&& forkout
>= 0)
1528 /* vfork succeeded. */
1529 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
1532 register_child (pid
, inchannel
);
1533 #endif /* WINDOWSNT */
1535 /* If the subfork execv fails, and it exits,
1536 this close hangs. I don't know why.
1537 So have an interrupt jar it loose. */
1539 signal (SIGALRM
, create_process_1
);
1541 XPROCESS (process
)->subtty
= Qnil
;
1546 if (forkin
!= forkout
&& forkout
>= 0)
1551 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1554 XPROCESS (process
)->tty_name
= Qnil
;
1557 /* Restore the signal state whether vfork succeeded or not.
1558 (We will signal an error, below, if it failed.) */
1559 #ifdef POSIX_SIGNALS
1561 /* Restore the parent's signal handlers. */
1562 sigaction (SIGINT
, &sigint_action
, 0);
1563 sigaction (SIGQUIT
, &sigquit_action
, 0);
1565 sigaction (SIGHUP
, &sighup_action
, 0);
1567 #endif /* HAVE_VFORK */
1568 /* Stop blocking signals in the parent. */
1569 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1570 #else /* !POSIX_SIGNALS */
1574 #else /* not BSD4_1 */
1575 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1576 sigsetmask (SIGEMPTYMASK
);
1577 #else /* ordinary USG */
1579 signal (SIGCHLD
, sigchld
);
1580 /* Now really handle any of these signals
1581 that came in during this function. */
1582 if (sigchld_deferred
)
1583 kill (getpid (), SIGCHLD
);
1585 #endif /* ordinary USG */
1586 #endif /* not BSD4_1 */
1587 #endif /* SIGCHLD */
1588 #endif /* !POSIX_SIGNALS */
1590 /* Now generate the error if vfork failed. */
1592 report_file_error ("Doing vfork", Qnil
);
1594 #endif /* not VMS */
1598 /* open a TCP network connection to a given HOST/SERVICE. Treated
1599 exactly like a normal process when reading and writing. Only
1600 differences are in status display and process deletion. A network
1601 connection has no PID; you cannot signal it. All you can do is
1602 deactivate and close it via delete-process */
1604 DEFUN ("open-network-stream", Fopen_network_stream
, Sopen_network_stream
,
1606 "Open a TCP connection for a service to a host.\n\
1607 Returns a subprocess-object to represent the connection.\n\
1608 Input and output work as for subprocesses; `delete-process' closes it.\n\
1609 Args are NAME BUFFER HOST SERVICE.\n\
1610 NAME is name for process. It is modified if necessary to make it unique.\n\
1611 BUFFER is the buffer (or buffer-name) to associate with the process.\n\
1612 Process output goes at end of that buffer, unless you specify\n\
1613 an output stream or filter function to handle the output.\n\
1614 BUFFER may be also nil, meaning that this process is not associated\n\
1616 Third arg is name of the host to connect to, or its IP address.\n\
1617 Fourth arg SERVICE is name of the service desired, or an integer\n\
1618 specifying a port number to connect to.")
1619 (name
, buffer
, host
, service
)
1620 Lisp_Object name
, buffer
, host
, service
;
1624 struct sockaddr_in address
;
1625 struct servent
*svc_info
;
1626 struct hostent
*host_info_ptr
, host_info
;
1627 char *(addr_list
[2]);
1628 IN_ADDR numeric_addr
;
1632 struct hostent host_info_fixed
;
1633 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1635 int count
= specpdl_ptr
- specpdl
;
1637 GCPRO4 (name
, buffer
, host
, service
);
1638 CHECK_STRING (name
, 0);
1639 CHECK_STRING (host
, 0);
1640 if (INTEGERP (service
))
1641 port
= htons ((unsigned short) XINT (service
));
1644 CHECK_STRING (service
, 0);
1645 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
1647 error ("Unknown service \"%s\"", XSTRING (service
)->data
);
1648 port
= svc_info
->s_port
;
1651 /* Slow down polling to every ten seconds.
1652 Some kernels have a bug which causes retrying connect to fail
1653 after a connect. Polling can interfere with gethostbyname too. */
1654 #ifdef POLL_FOR_INPUT
1655 bind_polling_period (10);
1666 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
1669 if (! (host_info_ptr
== 0 && h_errno
== TRY_AGAIN
))
1672 Fsleep_for (make_number (1), Qnil
);
1674 if (host_info_ptr
== 0)
1675 /* Attempt to interpret host as numeric inet address */
1677 numeric_addr
= inet_addr ((char *) XSTRING (host
)->data
);
1678 if (NUMERIC_ADDR_ERROR
)
1679 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
1681 host_info_ptr
= &host_info
;
1682 host_info
.h_name
= 0;
1683 host_info
.h_aliases
= 0;
1684 host_info
.h_addrtype
= AF_INET
;
1686 /* Older machines have only one address slot called h_addr.
1687 Newer machines have h_addr_list, but #define h_addr to
1688 be its first element. */
1689 host_info
.h_addr_list
= &(addr_list
[0]);
1691 host_info
.h_addr
= (char*)(&numeric_addr
);
1693 /* numeric_addr isn't null-terminated; it has fixed length. */
1694 host_info
.h_length
= sizeof (numeric_addr
);
1697 bzero (&address
, sizeof address
);
1698 bcopy (host_info_ptr
->h_addr
, (char *) &address
.sin_addr
,
1699 host_info_ptr
->h_length
);
1700 address
.sin_family
= host_info_ptr
->h_addrtype
;
1701 address
.sin_port
= port
;
1703 s
= socket (host_info_ptr
->h_addrtype
, SOCK_STREAM
, 0);
1705 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1707 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
1708 when connect is interrupted. So let's not let it get interrupted.
1709 Note we do not turn off polling, because polling is only used
1710 when not interrupt_input, and thus not normally used on the systems
1711 which have this bug. On systems which use polling, there's no way
1712 to quit if polling is turned off. */
1713 if (interrupt_input
)
1721 if (connect (s
, (struct sockaddr
*) &address
, sizeof address
) == -1
1722 && errno
!= EISCONN
)
1730 if (errno
== EADDRINUSE
&& retry
< 20)
1732 /* A delay here is needed on some FreeBSD systems,
1733 and it is harmless, since this retrying takes time anyway
1734 and should be infrequent. */
1735 Fsleep_for (make_number (1), Qnil
);
1742 if (interrupt_input
)
1746 report_file_error ("connection failed",
1747 Fcons (host
, Fcons (name
, Qnil
)));
1752 #ifdef POLL_FOR_INPUT
1753 unbind_to (count
, Qnil
);
1756 if (interrupt_input
)
1760 s
= connect_server (0);
1762 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1763 send_command (s
, C_PORT
, 0, "%s:%d", XSTRING (host
)->data
, ntohs (port
));
1764 send_command (s
, C_DUMB
, 1, 0);
1770 report_file_error ("error duplicating socket", Fcons (name
, Qnil
));
1773 buffer
= Fget_buffer_create (buffer
);
1774 proc
= make_process (name
);
1776 chan_process
[inch
] = proc
;
1779 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
1782 fcntl (inch
, F_SETFL
, O_NDELAY
);
1786 XPROCESS (proc
)->childp
= host
;
1787 XPROCESS (proc
)->command_channel_p
= Qnil
;
1788 XPROCESS (proc
)->buffer
= buffer
;
1789 XPROCESS (proc
)->sentinel
= Qnil
;
1790 XPROCESS (proc
)->filter
= Qnil
;
1791 XPROCESS (proc
)->command
= Qnil
;
1792 XPROCESS (proc
)->pid
= Qnil
;
1793 XSETINT (XPROCESS (proc
)->infd
, inch
);
1794 XSETINT (XPROCESS (proc
)->outfd
, outch
);
1795 XPROCESS (proc
)->status
= Qrun
;
1796 FD_SET (inch
, &input_wait_mask
);
1797 FD_SET (inch
, &non_keyboard_wait_mask
);
1798 if (inch
> max_process_desc
)
1799 max_process_desc
= inch
;
1804 #endif /* HAVE_SOCKETS */
1806 deactivate_process (proc
)
1809 register int inchannel
, outchannel
;
1810 register struct Lisp_Process
*p
= XPROCESS (proc
);
1812 inchannel
= XINT (p
->infd
);
1813 outchannel
= XINT (p
->outfd
);
1817 /* Beware SIGCHLD hereabouts. */
1818 flush_pending_output (inchannel
);
1821 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
1822 sys$
dassgn (outchannel
);
1823 vs
= get_vms_process_pointer (p
->pid
);
1825 give_back_vms_process_stuff (vs
);
1829 if (outchannel
>= 0 && outchannel
!= inchannel
)
1833 XSETINT (p
->infd
, -1);
1834 XSETINT (p
->outfd
, -1);
1835 chan_process
[inchannel
] = Qnil
;
1836 FD_CLR (inchannel
, &input_wait_mask
);
1837 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
1838 if (inchannel
== max_process_desc
)
1841 /* We just closed the highest-numbered process input descriptor,
1842 so recompute the highest-numbered one now. */
1843 max_process_desc
= 0;
1844 for (i
= 0; i
< MAXDESC
; i
++)
1845 if (!NILP (chan_process
[i
]))
1846 max_process_desc
= i
;
1851 /* Close all descriptors currently in use for communication
1852 with subprocess. This is used in a newly-forked subprocess
1853 to get rid of irrelevant descriptors. */
1855 close_process_descs ()
1859 for (i
= 0; i
< MAXDESC
; i
++)
1861 Lisp_Object process
;
1862 process
= chan_process
[i
];
1863 if (!NILP (process
))
1865 int in
= XINT (XPROCESS (process
)->infd
);
1866 int out
= XINT (XPROCESS (process
)->outfd
);
1869 if (out
>= 0 && in
!= out
)
1876 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
1878 "Allow any pending output from subprocesses to be read by Emacs.\n\
1879 It is read into the process' buffers or given to their filter functions.\n\
1880 Non-nil arg PROCESS means do not return until some output has been received\n\
1882 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
1883 seconds and microseconds to wait; return after that much time whether\n\
1884 or not there is input.\n\
1885 Return non-nil iff we received any output before the timeout expired.")
1886 (process
, timeout
, timeout_msecs
)
1887 register Lisp_Object process
, timeout
, timeout_msecs
;
1892 if (! NILP (timeout_msecs
))
1894 CHECK_NUMBER (timeout_msecs
, 2);
1895 useconds
= XINT (timeout_msecs
);
1896 if (!INTEGERP (timeout
))
1897 XSETINT (timeout
, 0);
1900 int carry
= useconds
/ 1000000;
1902 XSETINT (timeout
, XINT (timeout
) + carry
);
1903 useconds
-= carry
* 1000000;
1905 /* I think this clause is necessary because C doesn't
1906 guarantee a particular rounding direction for negative
1910 XSETINT (timeout
, XINT (timeout
) - 1);
1911 useconds
+= 1000000;
1918 if (! NILP (timeout
))
1920 CHECK_NUMBER (timeout
, 1);
1921 seconds
= XINT (timeout
);
1922 if (seconds
< 0 || (seconds
== 0 && useconds
== 0))
1934 XSETFASTINT (process
, 0);
1937 (wait_reading_process_input (seconds
, useconds
, process
, 0)
1941 /* This variable is different from waiting_for_input in keyboard.c.
1942 It is used to communicate to a lisp process-filter/sentinel (via the
1943 function Fwaiting_for_user_input_p below) whether emacs was waiting
1944 for user-input when that process-filter was called.
1945 waiting_for_input cannot be used as that is by definition 0 when
1946 lisp code is being evalled.
1947 This is also used in record_asynch_buffer_change.
1948 For that purpose, this must be 0
1949 when not inside wait_reading_process_input. */
1950 static int waiting_for_user_input_p
;
1952 /* This is here so breakpoints can be put on it. */
1954 wait_reading_process_input_1 ()
1958 /* Read and dispose of subprocess output while waiting for timeout to
1959 elapse and/or keyboard input to be available.
1962 timeout in seconds, or
1963 zero for no limit, or
1964 -1 means gobble data immediately available but don't wait for any.
1967 an additional duration to wait, measured in microseconds.
1968 If this is nonzero and time_limit is 0, then the timeout
1969 consists of MICROSECS only.
1971 READ_KBD is a lisp value:
1972 0 to ignore keyboard input, or
1973 1 to return when input is available, or
1974 -1 meaning caller will actually read the input, so don't throw to
1975 the quit handler, or
1976 a cons cell, meaning wait until its car is non-nil
1977 (and gobble terminal input into the buffer if any arrives), or
1978 a process object, meaning wait until something arrives from that
1979 process. The return value is true iff we read some input from
1982 DO_DISPLAY != 0 means redisplay should be done to show subprocess
1983 output that arrives.
1985 If READ_KBD is a pointer to a struct Lisp_Process, then the
1986 function returns true iff we received input from that process
1987 before the timeout elapsed.
1988 Otherwise, return true iff we received input from any process. */
1990 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
1991 int time_limit
, microsecs
;
1992 Lisp_Object read_kbd
;
1995 register int channel
, nfds
, m
;
1996 static SELECT_TYPE Available
;
1999 EMACS_TIME timeout
, end_time
, garbage
;
2001 int wait_channel
= -1;
2002 struct Lisp_Process
*wait_proc
= 0;
2003 int got_some_input
= 0;
2004 Lisp_Object
*wait_for_cell
= 0;
2006 FD_ZERO (&Available
);
2008 /* If read_kbd is a process to watch, set wait_proc and wait_channel
2010 if (PROCESSP (read_kbd
))
2012 wait_proc
= XPROCESS (read_kbd
);
2013 wait_channel
= XINT (wait_proc
->infd
);
2014 XSETFASTINT (read_kbd
, 0);
2017 /* If waiting for non-nil in a cell, record where. */
2018 if (CONSP (read_kbd
))
2020 wait_for_cell
= &XCONS (read_kbd
)->car
;
2021 XSETFASTINT (read_kbd
, 0);
2024 waiting_for_user_input_p
= XINT (read_kbd
);
2026 /* Since we may need to wait several times,
2027 compute the absolute time to return at. */
2028 if (time_limit
|| microsecs
)
2030 EMACS_GET_TIME (end_time
);
2031 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
2032 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
2037 int timeout_reduced_for_timers
= 0;
2039 /* If calling from keyboard input, do not quit
2040 since we want to return C-g as an input character.
2041 Otherwise, do pending quit if requested. */
2042 if (XINT (read_kbd
) >= 0)
2045 /* Exit now if the cell we're waiting for became non-nil. */
2046 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2049 /* Compute time from now till when time limit is up */
2050 /* Exit if already run out */
2051 if (time_limit
== -1)
2053 /* -1 specified for timeout means
2054 gobble output available now
2055 but don't wait at all. */
2057 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2059 else if (time_limit
|| microsecs
)
2061 EMACS_GET_TIME (timeout
);
2062 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
2063 if (EMACS_TIME_NEG_P (timeout
))
2068 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
2071 /* Normally we run timers here.
2072 But not if wait_for_cell; in those cases,
2073 the wait is supposed to be short,
2074 and those callers cannot handle running arbitrary Lisp code here. */
2075 if (! wait_for_cell
)
2077 EMACS_TIME timer_delay
;
2081 old_timers_run
= timers_run
;
2082 timer_delay
= timer_check (1);
2083 if (timers_run
!= old_timers_run
&& do_display
)
2085 redisplay_preserve_echo_area ();
2086 /* We must retry, since a timer may have requeued itself
2087 and that could alter the time_delay. */
2091 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
2093 EMACS_TIME difference
;
2094 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
2095 if (EMACS_TIME_NEG_P (difference
))
2097 timeout
= timer_delay
;
2098 timeout_reduced_for_timers
= 1;
2101 /* If time_limit is -1, we are not going to wait at all. */
2102 else if (time_limit
!= -1)
2104 /* This is so a breakpoint can be put here. */
2105 wait_reading_process_input_1 ();
2109 /* Cause C-g and alarm signals to take immediate action,
2110 and cause input available signals to zero out timeout.
2112 It is important that we do this before checking for process
2113 activity. If we get a SIGCHLD after the explicit checks for
2114 process activity, timeout is the only way we will know. */
2115 if (XINT (read_kbd
) < 0)
2116 set_waiting_for_input (&timeout
);
2118 /* If status of something has changed, and no input is
2119 available, notify the user of the change right away. After
2120 this explicit check, we'll let the SIGCHLD handler zap
2121 timeout to get our attention. */
2122 if (update_tick
!= process_tick
&& do_display
)
2124 Atemp
= input_wait_mask
;
2125 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2126 if ((select (MAXDESC
, &Atemp
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2130 /* It's okay for us to do this and then continue with
2131 the loop, since timeout has already been zeroed out. */
2132 clear_waiting_for_input ();
2137 /* Don't wait for output from a non-running process. */
2138 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
2139 update_status (wait_proc
);
2141 && ! EQ (wait_proc
->status
, Qrun
))
2143 clear_waiting_for_input ();
2147 /* Wait till there is something to do */
2149 if (! XINT (read_kbd
) && wait_for_cell
== 0)
2150 Available
= non_keyboard_wait_mask
;
2152 Available
= input_wait_mask
;
2154 /* If frame size has changed or the window is newly mapped,
2155 redisplay now, before we start to wait. There is a race
2156 condition here; if a SIGIO arrives between now and the select
2157 and indicates that a frame is trashed, the select may block
2158 displaying a trashed screen. */
2159 if (frame_garbaged
&& do_display
)
2161 clear_waiting_for_input ();
2162 redisplay_preserve_echo_area ();
2163 if (XINT (read_kbd
) < 0)
2164 set_waiting_for_input (&timeout
);
2167 if (XINT (read_kbd
) && detect_input_pending ())
2170 FD_ZERO (&Available
);
2173 nfds
= select (MAXDESC
, &Available
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2178 /* Make C-g and alarm signals set flags again */
2179 clear_waiting_for_input ();
2181 /* If we woke up due to SIGWINCH, actually change size now. */
2182 do_pending_window_change ();
2184 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
2185 /* We wanted the full specified time, so return now. */
2189 if (xerrno
== EINTR
)
2190 FD_ZERO (&Available
);
2192 /* Ultrix select seems to return ENOMEM when it is
2193 interrupted. Treat it just like EINTR. Bleah. Note
2194 that we want to test for the "ultrix" CPP symbol, not
2195 "__ultrix__"; the latter is only defined under GCC, but
2196 not by DEC's bundled CC. -JimB */
2197 else if (xerrno
== ENOMEM
)
2198 FD_ZERO (&Available
);
2201 /* This happens for no known reason on ALLIANT.
2202 I am guessing that this is the right response. -- RMS. */
2203 else if (xerrno
== EFAULT
)
2204 FD_ZERO (&Available
);
2206 else if (xerrno
== EBADF
)
2209 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
2210 the child's closure of the pts gives the parent a SIGHUP, and
2211 the ptc file descriptor is automatically closed,
2212 yielding EBADF here or at select() call above.
2213 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
2214 in m/ibmrt-aix.h), and here we just ignore the select error.
2215 Cleanup occurs c/o status_notify after SIGCLD. */
2216 FD_ZERO (&Available
); /* Cannot depend on values returned */
2222 error ("select error: %s", strerror (xerrno
));
2224 #if defined(sun) && !defined(USG5_4)
2225 else if (nfds
> 0 && keyboard_bit_set (&Available
)
2227 /* System sometimes fails to deliver SIGIO.
2229 David J. Mackenzie says that Emacs doesn't compile under
2230 Solaris if this code is enabled, thus the USG5_4 in the CPP
2231 conditional. "I haven't noticed any ill effects so far.
2232 If you find a Solaris expert somewhere, they might know
2234 kill (getpid (), SIGIO
);
2237 /* Check for keyboard input */
2238 /* If there is any, return immediately
2239 to give it higher priority than subprocesses */
2241 if ((XINT (read_kbd
) != 0)
2242 && detect_input_pending_run_timers (do_display
))
2244 swallow_events (do_display
);
2245 if (detect_input_pending_run_timers (do_display
))
2249 /* If wait_for_cell. check for keyboard input
2250 but don't run any timers.
2251 ??? (It seems wrong to me to check for keyboard
2252 input at all when wait_for_cell, but the code
2253 has been this way since July 1994.
2254 Try changing this after version 19.31.) */
2256 && detect_input_pending ())
2258 swallow_events (do_display
);
2259 if (detect_input_pending ())
2263 /* Exit now if the cell we're waiting for became non-nil. */
2264 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2268 /* If we think we have keyboard input waiting, but didn't get SIGIO
2269 go read it. This can happen with X on BSD after logging out.
2270 In that case, there really is no input and no SIGIO,
2271 but select says there is input. */
2273 if (XINT (read_kbd
) && interrupt_input
2274 && (keyboard_bit_set (&Available
)))
2275 kill (getpid (), SIGIO
);
2279 got_some_input
|= nfds
> 0;
2281 /* If checking input just got us a size-change event from X,
2282 obey it now if we should. */
2283 if (XINT (read_kbd
) || wait_for_cell
)
2284 do_pending_window_change ();
2286 /* Check for data from a process. */
2287 /* Really FIRST_PROC_DESC should be 0 on Unix,
2288 but this is safer in the short run. */
2289 for (channel
= 0; channel
<= max_process_desc
; channel
++)
2291 if (FD_ISSET (channel
, &Available
)
2292 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
2296 /* If waiting for this channel, arrange to return as
2297 soon as no more input to be processed. No more
2299 if (wait_channel
== channel
)
2305 proc
= chan_process
[channel
];
2309 /* Read data from the process, starting with our
2310 buffered-ahead character if we have one. */
2312 nread
= read_process_output (proc
, channel
);
2315 /* Since read_process_output can run a filter,
2316 which can call accept-process-output,
2317 don't try to read from any other processes
2318 before doing the select again. */
2319 FD_ZERO (&Available
);
2322 redisplay_preserve_echo_area ();
2325 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2329 else if (nread
== -1 && errno
== EAGAIN
)
2333 else if (nread
== -1 && errno
== EAGAIN
)
2335 /* Note that we cannot distinguish between no input
2336 available now and a closed pipe.
2337 With luck, a closed pipe will be accompanied by
2338 subprocess termination and SIGCHLD. */
2339 else if (nread
== 0 && !NETCONN_P (proc
))
2341 #endif /* O_NDELAY */
2342 #endif /* O_NONBLOCK */
2343 #endif /* EWOULDBLOCK */
2345 /* On some OSs with ptys, when the process on one end of
2346 a pty exits, the other end gets an error reading with
2347 errno = EIO instead of getting an EOF (0 bytes read).
2348 Therefore, if we get an error reading and errno =
2349 EIO, just continue, because the child process has
2350 exited and should clean itself up soon (e.g. when we
2352 else if (nread
== -1 && errno
== EIO
)
2354 #endif /* HAVE_PTYS */
2355 /* If we can detect process termination, don't consider the process
2356 gone just because its pipe is closed. */
2358 else if (nread
== 0 && !NETCONN_P (proc
))
2363 /* Preserve status of processes already terminated. */
2364 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2365 deactivate_process (proc
);
2366 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2367 update_status (XPROCESS (proc
));
2368 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2369 XPROCESS (proc
)->status
2370 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2373 } /* end for each file descriptor */
2374 } /* end while exit conditions not met */
2376 waiting_for_user_input_p
= 0;
2378 /* If calling from keyboard input, do not quit
2379 since we want to return C-g as an input character.
2380 Otherwise, do pending quit if requested. */
2381 if (XINT (read_kbd
) >= 0)
2383 /* Prevent input_pending from remaining set if we quit. */
2384 clear_input_pending ();
2388 return got_some_input
;
2391 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
2394 read_process_output_call (fun_and_args
)
2395 Lisp_Object fun_and_args
;
2397 return apply1 (XCONS (fun_and_args
)->car
, XCONS (fun_and_args
)->cdr
);
2401 read_process_output_error_handler (error
)
2404 cmd_error_internal (error
, "error in process filter: ");
2406 update_echo_area ();
2407 Fsleep_for (make_number (2), Qnil
);
2410 /* Read pending output from the process channel,
2411 starting with our buffered-ahead character if we have one.
2412 Yield number of characters read.
2414 This function reads at most 1024 characters.
2415 If you want to read all available subprocess output,
2416 you must call it repeatedly until it returns zero. */
2418 read_process_output (proc
, channel
)
2420 register int channel
;
2422 register int nchars
;
2428 register Lisp_Object outstream
;
2429 register struct buffer
*old
= current_buffer
;
2430 register struct Lisp_Process
*p
= XPROCESS (proc
);
2431 register int opoint
;
2434 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2436 vs
= get_vms_process_pointer (p
->pid
);
2440 return(0); /* Really weird if it does this */
2441 if (!(vs
->iosb
[0] & 1))
2442 return -1; /* I/O error */
2445 error ("Could not get VMS process pointer");
2446 chars
= vs
->inputBuffer
;
2447 nchars
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2450 start_vms_process_read (vs
); /* Crank up the next read on the process */
2451 return 1; /* Nothing worth printing, say we got 1 */
2455 if (proc_buffered_char
[channel
] < 0)
2456 nchars
= read (channel
, chars
, sizeof (chars
));
2459 chars
[0] = proc_buffered_char
[channel
];
2460 proc_buffered_char
[channel
] = -1;
2461 nchars
= read (channel
, chars
+ 1, sizeof (chars
) - 1);
2465 nchars
= nchars
+ 1;
2467 #endif /* not VMS */
2469 if (nchars
<= 0) return nchars
;
2471 outstream
= p
->filter
;
2472 if (!NILP (outstream
))
2474 /* We inhibit quit here instead of just catching it so that
2475 hitting ^G when a filter happens to be running won't screw
2477 int count
= specpdl_ptr
- specpdl
;
2478 Lisp_Object odeactivate
;
2479 Lisp_Object obuffer
, okeymap
;
2481 /* No need to gcpro these, because all we do with them later
2482 is test them for EQness, and none of them should be a string. */
2483 odeactivate
= Vdeactivate_mark
;
2484 XSETBUFFER (obuffer
, current_buffer
);
2485 okeymap
= current_buffer
->keymap
;
2487 specbind (Qinhibit_quit
, Qt
);
2488 specbind (Qlast_nonmenu_event
, Qt
);
2490 running_asynch_code
= 1;
2491 internal_condition_case_1 (read_process_output_call
,
2494 Fcons (make_string (chars
,
2497 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
2498 read_process_output_error_handler
);
2499 running_asynch_code
= 0;
2500 restore_match_data ();
2502 /* Handling the process output should not deactivate the mark. */
2503 Vdeactivate_mark
= odeactivate
;
2505 #if 0 /* Call record_asynch_buffer_change unconditionally,
2506 because we might have changed minor modes or other things
2507 that affect key bindings. */
2508 if (! EQ (Fcurrent_buffer (), obuffer
)
2509 || ! EQ (current_buffer
->keymap
, okeymap
))
2511 /* But do it only if the caller is actually going to read events.
2512 Otherwise there's no need to make him wake up, and it could
2513 cause trouble (for example it would make Fsit_for return). */
2514 if (waiting_for_user_input_p
== -1)
2515 record_asynch_buffer_change ();
2518 start_vms_process_read (vs
);
2520 unbind_to (count
, Qnil
);
2524 /* If no filter, write into buffer if it isn't dead. */
2525 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2527 Lisp_Object old_read_only
;
2528 Lisp_Object old_begv
, old_zv
;
2529 Lisp_Object odeactivate
;
2531 odeactivate
= Vdeactivate_mark
;
2533 Fset_buffer (p
->buffer
);
2535 old_read_only
= current_buffer
->read_only
;
2536 XSETFASTINT (old_begv
, BEGV
);
2537 XSETFASTINT (old_zv
, ZV
);
2539 current_buffer
->read_only
= Qnil
;
2541 /* Insert new output into buffer
2542 at the current end-of-output marker,
2543 thus preserving logical ordering of input and output. */
2544 if (XMARKER (p
->mark
)->buffer
)
2545 SET_PT (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
));
2549 /* If the output marker is outside of the visible region, save
2550 the restriction and widen. */
2551 if (! (BEGV
<= point
&& point
<= ZV
))
2554 /* Make sure opoint floats ahead of any new text, just as point
2556 if (point
<= opoint
)
2559 /* Insert after old_begv, but before old_zv. */
2560 if (point
< XFASTINT (old_begv
))
2561 XSETFASTINT (old_begv
, XFASTINT (old_begv
) + nchars
);
2562 if (point
<= XFASTINT (old_zv
))
2563 XSETFASTINT (old_zv
, XFASTINT (old_zv
) + nchars
);
2565 /* Insert before markers in case we are inserting where
2566 the buffer's mark is, and the user's next command is Meta-y. */
2567 insert_before_markers (chars
, nchars
);
2568 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
2570 update_mode_lines
++;
2572 /* If the restriction isn't what it should be, set it. */
2573 if (XFASTINT (old_begv
) != BEGV
|| XFASTINT (old_zv
) != ZV
)
2574 Fnarrow_to_region (old_begv
, old_zv
);
2576 /* Handling the process output should not deactivate the mark. */
2577 Vdeactivate_mark
= odeactivate
;
2579 current_buffer
->read_only
= old_read_only
;
2581 set_buffer_internal (old
);
2584 start_vms_process_read (vs
);
2589 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
2591 "Returns non-nil if emacs is waiting for input from the user.\n\
2592 This is intended for use by asynchronous process output filters and sentinels.")
2595 return (waiting_for_user_input_p
? Qt
: Qnil
);
2598 /* Sending data to subprocess */
2600 jmp_buf send_process_frame
;
2603 send_process_trap ()
2609 longjmp (send_process_frame
, 1);
2612 /* Send some data to process PROC.
2613 BUF is the beginning of the data; LEN is the number of characters.
2614 OBJECT is the Lisp object that the data comes from. */
2616 send_process (proc
, buf
, len
, object
)
2617 volatile Lisp_Object proc
;
2622 /* Use volatile to protect variables from being clobbered by longjmp. */
2624 volatile unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
2627 struct Lisp_Process
*p
= XPROCESS (proc
);
2628 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2631 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2632 update_status (XPROCESS (proc
));
2633 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2634 error ("Process %s not running", procname
);
2637 vs
= get_vms_process_pointer (p
->pid
);
2639 error ("Could not find this process: %x", p
->pid
);
2640 else if (write_to_vms_process (vs
, buf
, len
))
2644 if (pty_max_bytes
== 0)
2646 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
2647 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
2649 if (pty_max_bytes
< 0)
2650 pty_max_bytes
= 250;
2652 pty_max_bytes
= 250;
2654 /* Deduct one, to leave space for the eof. */
2658 if (!setjmp (send_process_frame
))
2662 SIGTYPE (*old_sigpipe
)();
2665 /* Decide how much data we can send in one batch.
2666 Long lines need to be split into multiple batches. */
2667 if (!NILP (XPROCESS (proc
)->pty_flag
))
2669 /* Starting this at zero is always correct when not the first iteration
2670 because the previous iteration ended by sending C-d.
2671 It may not be correct for the first iteration
2672 if a partial line was sent in a separate send_process call.
2673 If that proves worth handling, we need to save linepos
2674 in the process object. */
2677 char *end
= buf
+ len
;
2679 /* Scan through this text for a line that is too long. */
2680 while (ptr
!= end
&& linepos
< pty_max_bytes
)
2688 /* If we found one, break the line there
2689 and put in a C-d to force the buffer through. */
2693 /* Send this batch, using one or more write calls. */
2696 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
2697 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
2698 signal (SIGPIPE
, old_sigpipe
);
2704 || errno
== EWOULDBLOCK
2710 /* Buffer is full. Wait, accepting input;
2711 that may allow the program
2712 to finish doing output and read more. */
2717 /* Running filters might relocate buffers or strings.
2718 Arrange to relocate BUF. */
2719 if (BUFFERP (object
))
2720 offset
= BUF_PTR_CHAR_POS (XBUFFER (object
),
2721 (unsigned char *) buf
);
2722 else if (STRINGP (object
))
2723 offset
= buf
- (char *) XSTRING (object
)->data
;
2725 XSETFASTINT (zero
, 0);
2726 wait_reading_process_input (1, 0, zero
, 0);
2728 if (BUFFERP (object
))
2729 buf
= (char *) BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
2730 else if (STRINGP (object
))
2731 buf
= offset
+ (char *) XSTRING (object
)->data
;
2736 /* This is a real error. */
2737 report_file_error ("writing to process", Fcons (proc
, Qnil
));
2744 /* If we sent just part of the string, put in an EOF
2745 to force it through, before we send the rest. */
2747 Fprocess_send_eof (proc
);
2752 XPROCESS (proc
)->raw_status_low
= Qnil
;
2753 XPROCESS (proc
)->raw_status_high
= Qnil
;
2754 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2755 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2756 deactivate_process (proc
);
2758 error ("Error writing to process %s; closed it", procname
);
2760 error ("SIGPIPE raised on process %s; closed it", procname
);
2765 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
2767 "Send current contents of region as input to PROCESS.\n\
2768 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2769 nil, indicating the current buffer's process.\n\
2770 Called from program, takes three arguments, PROCESS, START and END.\n\
2771 If the region is more than 500 characters long,\n\
2772 it is sent in several bunches. This may happen even for shorter regions.\n\
2773 Output from processes can arrive in between bunches.")
2774 (process
, start
, end
)
2775 Lisp_Object process
, start
, end
;
2780 proc
= get_process (process
);
2781 validate_region (&start
, &end
);
2783 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
2786 start1
= XINT (start
);
2787 send_process (proc
, &FETCH_CHAR (start1
), XINT (end
) - XINT (start
),
2788 Fcurrent_buffer ());
2793 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
2795 "Send PROCESS the contents of STRING as input.\n\
2796 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2797 nil, indicating the current buffer's process.\n\
2798 If STRING is more than 500 characters long,\n\
2799 it is sent in several bunches. This may happen even for shorter strings.\n\
2800 Output from processes can arrive in between bunches.")
2802 Lisp_Object process
, string
;
2805 CHECK_STRING (string
, 1);
2806 proc
= get_process (process
);
2807 send_process (proc
, XSTRING (string
)->data
, XSTRING (string
)->size
, string
);
2811 /* send a signal number SIGNO to PROCESS.
2812 CURRENT_GROUP means send to the process group that currently owns
2813 the terminal being used to communicate with PROCESS.
2814 This is used for various commands in shell mode.
2815 If NOMSG is zero, insert signal-announcements into process's buffers
2818 If we can, we try to signal PROCESS by sending control characters
2819 down the pty. This allows us to signal inferiors who have changed
2820 their uid, for which killpg would return an EPERM error. */
2823 process_send_signal (process
, signo
, current_group
, nomsg
)
2824 Lisp_Object process
;
2826 Lisp_Object current_group
;
2830 register struct Lisp_Process
*p
;
2834 proc
= get_process (process
);
2835 p
= XPROCESS (proc
);
2837 if (!EQ (p
->childp
, Qt
))
2838 error ("Process %s is not a subprocess",
2839 XSTRING (p
->name
)->data
);
2840 if (XINT (p
->infd
) < 0)
2841 error ("Process %s is not active",
2842 XSTRING (p
->name
)->data
);
2844 if (NILP (p
->pty_flag
))
2845 current_group
= Qnil
;
2847 /* If we are using pgrps, get a pgrp number and make it negative. */
2848 if (!NILP (current_group
))
2850 #ifdef SIGNALS_VIA_CHARACTERS
2851 /* If possible, send signals to the entire pgrp
2852 by sending an input character to it. */
2854 /* TERMIOS is the latest and bestest, and seems most likely to
2855 work. If the system has it, use it. */
2862 tcgetattr (XINT (p
->infd
), &t
);
2863 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2867 tcgetattr (XINT (p
->infd
), &t
);
2868 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2872 tcgetattr (XINT (p
->infd
), &t
);
2873 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
2874 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2876 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
2881 #else /* ! HAVE_TERMIOS */
2883 /* On Berkeley descendants, the following IOCTL's retrieve the
2884 current control characters. */
2885 #if defined (TIOCGLTC) && defined (TIOCGETC)
2893 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2894 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
2897 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2898 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
2902 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
2903 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
2905 #endif /* ! defined (SIGTSTP) */
2908 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2910 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
2917 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2918 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2921 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2922 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2926 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2927 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2929 #endif /* ! defined (SIGTSTP) */
2931 #else /* ! defined (TCGETA) */
2932 Your configuration files are messed up
.
2933 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
2934 you'd better be using one of the alternatives above! */
2935 #endif /* ! defined (TCGETA) */
2936 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2937 #endif /* ! defined HAVE_TERMIOS */
2938 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
2941 /* Get the pgrp using the tty itself, if we have that.
2942 Otherwise, use the pty to get the pgrp.
2943 On pfa systems, saka@pfu.fujitsu.co.JP writes:
2944 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
2945 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
2946 His patch indicates that if TIOCGPGRP returns an error, then
2947 we should just assume that p->pid is also the process group id. */
2951 if (!NILP (p
->subtty
))
2952 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
2954 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
2958 gid
= - XFASTINT (p
->pid
);
2959 #endif /* ! defined (pfa) */
2965 #else /* ! defined (TIOCGPGRP ) */
2966 /* Can't select pgrps on this system, so we know that
2967 the child itself heads the pgrp. */
2968 gid
= - XFASTINT (p
->pid
);
2969 #endif /* ! defined (TIOCGPGRP ) */
2972 gid
= - XFASTINT (p
->pid
);
2978 p
->raw_status_low
= Qnil
;
2979 p
->raw_status_high
= Qnil
;
2981 XSETINT (p
->tick
, ++process_tick
);
2985 #endif /* ! defined (SIGCONT) */
2988 send_process (proc
, "\003", 1, Qnil
); /* ^C */
2993 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
2998 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
3001 flush_pending_output (XINT (p
->infd
));
3005 /* If we don't have process groups, send the signal to the immediate
3006 subprocess. That isn't really right, but it's better than any
3007 obvious alternative. */
3010 kill (XFASTINT (p
->pid
), signo
);
3014 /* gid may be a pid, or minus a pgrp's number */
3016 if (!NILP (current_group
))
3017 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
3020 gid
= - XFASTINT (p
->pid
);
3023 #else /* ! defined (TIOCSIGSEND) */
3024 EMACS_KILLPG (-gid
, signo
);
3025 #endif /* ! defined (TIOCSIGSEND) */
3028 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
3029 "Interrupt process PROCESS. May be process or name of one.\n\
3030 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
3031 nil or no arg means current buffer's process.\n\
3032 Second arg CURRENT-GROUP non-nil means send signal to\n\
3033 the current process-group of the process's controlling terminal\n\
3034 rather than to the process's own process group.\n\
3035 If the process is a shell, this means interrupt current subjob\n\
3036 rather than the shell.")
3037 (process
, current_group
)
3038 Lisp_Object process
, current_group
;
3040 process_send_signal (process
, SIGINT
, current_group
, 0);
3044 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
3045 "Kill process PROCESS. May be process or name of one.\n\
3046 See function `interrupt-process' for more details on usage.")
3047 (process
, current_group
)
3048 Lisp_Object process
, current_group
;
3050 process_send_signal (process
, SIGKILL
, current_group
, 0);
3054 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
3055 "Send QUIT signal to process PROCESS. May be process or name of one.\n\
3056 See function `interrupt-process' for more details on usage.")
3057 (process
, current_group
)
3058 Lisp_Object process
, current_group
;
3060 process_send_signal (process
, SIGQUIT
, current_group
, 0);
3064 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
3065 "Stop process PROCESS. May be process or name of one.\n\
3066 See function `interrupt-process' for more details on usage.")
3067 (process
, current_group
)
3068 Lisp_Object process
, current_group
;
3071 error ("no SIGTSTP support");
3073 process_send_signal (process
, SIGTSTP
, current_group
, 0);
3078 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
3079 "Continue process PROCESS. May be process or name of one.\n\
3080 See function `interrupt-process' for more details on usage.")
3081 (process
, current_group
)
3082 Lisp_Object process
, current_group
;
3085 process_send_signal (process
, SIGCONT
, current_group
, 0);
3087 error ("no SIGCONT support");
3092 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
3093 2, 2, "nProcess number: \nnSignal code: ",
3094 "Send the process with process id PID the signal with code SIGCODE.\n\
3095 PID must be an integer. The process need not be a child of this Emacs.\n\
3096 SIGCODE may be an integer, or a symbol whose name is a signal name.")
3098 Lisp_Object pid
, sigcode
;
3100 CHECK_NUMBER (pid
, 0);
3102 #define handle_signal(NAME, VALUE) \
3103 else if (!strcmp (name, NAME)) \
3104 XSETINT (sigcode, VALUE)
3106 if (INTEGERP (sigcode
))
3110 unsigned char *name
;
3112 CHECK_SYMBOL (sigcode
, 1);
3113 name
= XSYMBOL (sigcode
)->name
->data
;
3118 handle_signal ("SIGHUP", SIGHUP
);
3121 handle_signal ("SIGINT", SIGINT
);
3124 handle_signal ("SIGQUIT", SIGQUIT
);
3127 handle_signal ("SIGILL", SIGILL
);
3130 handle_signal ("SIGABRT", SIGABRT
);
3133 handle_signal ("SIGEMT", SIGEMT
);
3136 handle_signal ("SIGKILL", SIGKILL
);
3139 handle_signal ("SIGFPE", SIGFPE
);
3142 handle_signal ("SIGBUS", SIGBUS
);
3145 handle_signal ("SIGSEGV", SIGSEGV
);
3148 handle_signal ("SIGSYS", SIGSYS
);
3151 handle_signal ("SIGPIPE", SIGPIPE
);
3154 handle_signal ("SIGALRM", SIGALRM
);
3157 handle_signal ("SIGTERM", SIGTERM
);
3160 handle_signal ("SIGURG", SIGURG
);
3163 handle_signal ("SIGSTOP", SIGSTOP
);
3166 handle_signal ("SIGTSTP", SIGTSTP
);
3169 handle_signal ("SIGCONT", SIGCONT
);
3172 handle_signal ("SIGCHLD", SIGCHLD
);
3175 handle_signal ("SIGTTIN", SIGTTIN
);
3178 handle_signal ("SIGTTOU", SIGTTOU
);
3181 handle_signal ("SIGIO", SIGIO
);
3184 handle_signal ("SIGXCPU", SIGXCPU
);
3187 handle_signal ("SIGXFSZ", SIGXFSZ
);
3190 handle_signal ("SIGVTALRM", SIGVTALRM
);
3193 handle_signal ("SIGPROF", SIGPROF
);
3196 handle_signal ("SIGWINCH", SIGWINCH
);
3199 handle_signal ("SIGINFO", SIGINFO
);
3202 handle_signal ("SIGUSR1", SIGUSR1
);
3205 handle_signal ("SIGUSR2", SIGUSR2
);
3208 error ("Undefined signal name %s", name
);
3211 #undef handle_signal
3213 return make_number (kill (XINT (pid
), XINT (sigcode
)));
3216 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
3217 "Make PROCESS see end-of-file in its input.\n\
3218 Eof comes after any text already sent to it.\n\
3219 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3220 nil, indicating the current buffer's process.\n\
3221 If PROCESS is a network connection, or is a process communicating\n\
3222 through a pipe (as opposed to a pty), then you cannot send any more\n\
3223 text to PROCESS after you call this function.")
3225 Lisp_Object process
;
3229 proc
= get_process (process
);
3231 /* Make sure the process is really alive. */
3232 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3233 update_status (XPROCESS (proc
));
3234 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3235 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
3238 send_process (proc
, "\032", 1, Qnil
); /* ^z */
3240 if (!NILP (XPROCESS (proc
)->pty_flag
))
3241 send_process (proc
, "\004", 1, Qnil
);
3244 close (XINT (XPROCESS (proc
)->outfd
));
3245 XSETINT (XPROCESS (proc
)->outfd
, open (NULL_DEVICE
, O_WRONLY
));
3251 /* Kill all processes associated with `buffer'.
3252 If `buffer' is nil, kill all processes */
3254 kill_buffer_processes (buffer
)
3257 Lisp_Object tail
, proc
;
3259 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3261 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3262 if (GC_PROCESSP (proc
)
3263 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
3265 if (NETCONN_P (proc
))
3266 Fdelete_process (proc
);
3267 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
3268 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
3273 /* On receipt of a signal that a child status has changed,
3274 loop asking about children with changed statuses until
3275 the system says there are no more.
3276 All we do is change the status;
3277 we do not run sentinels or print notifications.
3278 That is saved for the next time keyboard input is done,
3279 in order to avoid timing errors. */
3281 /** WARNING: this can be called during garbage collection.
3282 Therefore, it must not be fooled by the presence of mark bits in
3285 /** USG WARNING: Although it is not obvious from the documentation
3286 in signal(2), on a USG system the SIGCLD handler MUST NOT call
3287 signal() before executing at least one wait(), otherwise the handler
3288 will be called again, resulting in an infinite loop. The relevant
3289 portion of the documentation reads "SIGCLD signals will be queued
3290 and the signal-catching function will be continually reentered until
3291 the queue is empty". Invoking signal() causes the kernel to reexamine
3292 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
3295 sigchld_handler (signo
)
3298 int old_errno
= errno
;
3300 register struct Lisp_Process
*p
;
3301 extern EMACS_TIME
*input_available_clear_time
;
3305 sigheld
|= sigbit (SIGCHLD
);
3317 #endif /* no WUNTRACED */
3318 /* Keep trying to get a status until we get a definitive result. */
3322 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
3324 while (pid
<= 0 && errno
== EINTR
);
3328 /* A real failure. We have done all our job, so return. */
3330 /* USG systems forget handlers when they are used;
3331 must reestablish each time */
3333 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
3336 sigheld
&= ~sigbit (SIGCHLD
);
3344 #endif /* no WNOHANG */
3346 /* Find the process that signaled us, and record its status. */
3349 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3351 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3352 p
= XPROCESS (proc
);
3353 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
3358 /* Look for an asynchronous process whose pid hasn't been filled
3361 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3363 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3364 p
= XPROCESS (proc
);
3365 if (INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
3370 /* Change the status of the process that was found. */
3373 union { int i
; WAITTYPE wt
; } u
;
3374 int clear_desc_flag
= 0;
3376 XSETINT (p
->tick
, ++process_tick
);
3378 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
3379 XSETINT (p
->raw_status_high
, u
.i
>> 16);
3381 /* If process has terminated, stop waiting for its output. */
3382 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
3383 && XINT (p
->infd
) >= 0)
3384 clear_desc_flag
= 1;
3386 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
3387 if (clear_desc_flag
)
3389 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
3390 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
3393 /* Tell wait_reading_process_input that it needs to wake up and
3395 if (input_available_clear_time
)
3396 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3399 /* There was no asynchronous process found for that id. Check
3400 if we have a synchronous process. */
3403 synch_process_alive
= 0;
3405 /* Report the status of the synchronous process. */
3407 synch_process_retcode
= WRETCODE (w
);
3408 else if (WIFSIGNALED (w
))
3410 int code
= WTERMSIG (w
);
3416 /* Suppress warning if the table has const char *. */
3417 signame
= (char *) sys_siglist
[code
];
3419 signame
= sys_errlist
[code
];
3423 signame
= "unknown";
3425 synch_process_death
= signame
;
3428 /* Tell wait_reading_process_input that it needs to wake up and
3430 if (input_available_clear_time
)
3431 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3434 /* On some systems, we must return right away.
3435 If any more processes want to signal us, we will
3437 Otherwise (on systems that have WNOHANG), loop around
3438 to use up all the processes that have something to tell us. */
3439 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT)
3441 signal (signo
, sigchld_handler
);
3445 #endif /* USG, but not HPUX with WNOHANG */
3451 exec_sentinel_unwind (data
)
3454 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
3459 exec_sentinel_error_handler (error
)
3462 cmd_error_internal (error
, "error in process sentinel: ");
3464 update_echo_area ();
3465 Fsleep_for (make_number (2), Qnil
);
3469 exec_sentinel (proc
, reason
)
3470 Lisp_Object proc
, reason
;
3472 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
3473 register struct Lisp_Process
*p
= XPROCESS (proc
);
3474 int count
= specpdl_ptr
- specpdl
;
3476 /* No need to gcpro these, because all we do with them later
3477 is test them for EQness, and none of them should be a string. */
3478 odeactivate
= Vdeactivate_mark
;
3479 XSETBUFFER (obuffer
, current_buffer
);
3480 okeymap
= current_buffer
->keymap
;
3482 sentinel
= p
->sentinel
;
3483 if (NILP (sentinel
))
3486 /* Zilch the sentinel while it's running, to avoid recursive invocations;
3487 assure that it gets restored no matter how the sentinel exits. */
3489 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
3490 /* Inhibit quit so that random quits don't screw up a running filter. */
3491 specbind (Qinhibit_quit
, Qt
);
3492 specbind (Qlast_nonmenu_event
, Qt
);
3494 running_asynch_code
= 1;
3495 internal_condition_case_1 (read_process_output_call
,
3497 Fcons (proc
, Fcons (reason
, Qnil
))),
3498 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
3499 exec_sentinel_error_handler
);
3500 running_asynch_code
= 0;
3501 restore_match_data ();
3503 Vdeactivate_mark
= odeactivate
;
3505 if (! EQ (Fcurrent_buffer (), obuffer
)
3506 || ! EQ (current_buffer
->keymap
, okeymap
))
3508 /* But do it only if the caller is actually going to read events.
3509 Otherwise there's no need to make him wake up, and it could
3510 cause trouble (for example it would make Fsit_for return). */
3511 if (waiting_for_user_input_p
== -1)
3512 record_asynch_buffer_change ();
3514 unbind_to (count
, Qnil
);
3517 /* Report all recent events of a change in process status
3518 (either run the sentinel or output a message).
3519 This is done while Emacs is waiting for keyboard input. */
3523 register Lisp_Object proc
, buffer
;
3524 Lisp_Object tail
, msg
;
3525 struct gcpro gcpro1
, gcpro2
;
3529 /* We need to gcpro tail; if read_process_output calls a filter
3530 which deletes a process and removes the cons to which tail points
3531 from Vprocess_alist, and then causes a GC, tail is an unprotected
3535 /* Set this now, so that if new processes are created by sentinels
3536 that we run, we get called again to handle their status changes. */
3537 update_tick
= process_tick
;
3539 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
3542 register struct Lisp_Process
*p
;
3544 proc
= Fcdr (Fcar (tail
));
3545 p
= XPROCESS (proc
);
3547 if (XINT (p
->tick
) != XINT (p
->update_tick
))
3549 XSETINT (p
->update_tick
, XINT (p
->tick
));
3551 /* If process is still active, read any output that remains. */
3552 if (XINT (p
->infd
) >= 0)
3553 while (! EQ (p
->filter
, Qt
)
3554 && read_process_output (proc
, XINT (p
->infd
)) > 0);
3558 /* Get the text to use for the message. */
3559 if (!NILP (p
->raw_status_low
))
3561 msg
= status_message (p
->status
);
3563 /* If process is terminated, deactivate it or delete it. */
3565 if (CONSP (p
->status
))
3566 symbol
= XCONS (p
->status
)->car
;
3568 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
3569 || EQ (symbol
, Qclosed
))
3571 if (delete_exited_processes
)
3572 remove_process (proc
);
3574 deactivate_process (proc
);
3577 /* Now output the message suitably. */
3578 if (!NILP (p
->sentinel
))
3579 exec_sentinel (proc
, msg
);
3580 /* Don't bother with a message in the buffer
3581 when a process becomes runnable. */
3582 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
3584 Lisp_Object ro
, tem
;
3585 struct buffer
*old
= current_buffer
;
3588 ro
= XBUFFER (buffer
)->read_only
;
3590 /* Avoid error if buffer is deleted
3591 (probably that's why the process is dead, too) */
3592 if (NILP (XBUFFER (buffer
)->name
))
3594 Fset_buffer (buffer
);
3596 /* Insert new output into buffer
3597 at the current end-of-output marker,
3598 thus preserving logical ordering of input and output. */
3599 if (XMARKER (p
->mark
)->buffer
)
3600 SET_PT (marker_position (p
->mark
));
3603 if (point
<= opoint
)
3604 opoint
+= XSTRING (msg
)->size
+ XSTRING (p
->name
)->size
+ 10;
3606 tem
= current_buffer
->read_only
;
3607 current_buffer
->read_only
= Qnil
;
3608 insert_string ("\nProcess ");
3609 Finsert (1, &p
->name
);
3610 insert_string (" ");
3612 current_buffer
->read_only
= tem
;
3613 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
3616 set_buffer_internal (old
);
3621 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
3622 redisplay_preserve_echo_area ();
3627 /* The first time this is called, assume keyboard input comes from DESC
3628 instead of from where we used to expect it.
3629 Subsequent calls mean assume input keyboard can come from DESC
3630 in addition to other places. */
3632 static int add_keyboard_wait_descriptor_called_flag
;
3635 add_keyboard_wait_descriptor (desc
)
3638 if (! add_keyboard_wait_descriptor_called_flag
)
3639 FD_CLR (0, &input_wait_mask
);
3640 add_keyboard_wait_descriptor_called_flag
= 1;
3641 FD_SET (desc
, &input_wait_mask
);
3642 if (desc
> max_keyboard_desc
)
3643 max_keyboard_desc
= desc
;
3646 /* From now on, do not expect DESC to give keyboard input. */
3649 delete_keyboard_wait_descriptor (desc
)
3653 int lim
= max_keyboard_desc
;
3655 FD_CLR (desc
, &input_wait_mask
);
3657 if (desc
== max_keyboard_desc
)
3658 for (fd
= 0; fd
< lim
; fd
++)
3659 if (FD_ISSET (fd
, &input_wait_mask
)
3660 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3661 max_keyboard_desc
= fd
;
3664 /* Return nonzero if *MASK has a bit set
3665 that corresponds to one of the keyboard input descriptors. */
3668 keyboard_bit_set (mask
)
3673 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
3674 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
3675 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3687 if (! noninteractive
|| initialized
)
3689 signal (SIGCHLD
, sigchld_handler
);
3692 FD_ZERO (&input_wait_mask
);
3693 FD_ZERO (&non_keyboard_wait_mask
);
3694 max_process_desc
= 0;
3696 FD_SET (0, &input_wait_mask
);
3698 Vprocess_alist
= Qnil
;
3699 for (i
= 0; i
< MAXDESC
; i
++)
3701 chan_process
[i
] = Qnil
;
3702 proc_buffered_char
[i
] = -1;
3709 stream_process
= intern ("stream");
3711 Qprocessp
= intern ("processp");
3712 staticpro (&Qprocessp
);
3713 Qrun
= intern ("run");
3715 Qstop
= intern ("stop");
3717 Qsignal
= intern ("signal");
3718 staticpro (&Qsignal
);
3720 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
3723 Qexit = intern ("exit");
3724 staticpro (&Qexit); */
3726 Qopen
= intern ("open");
3728 Qclosed
= intern ("closed");
3729 staticpro (&Qclosed
);
3731 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
3732 staticpro (&Qlast_nonmenu_event
);
3734 staticpro (&Vprocess_alist
);
3736 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
3737 "*Non-nil means delete processes immediately when they exit.\n\
3738 nil means don't delete them until `list-processes' is run.");
3740 delete_exited_processes
= 1;
3742 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
3743 "Control type of device used to communicate with subprocesses.\n\
3744 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
3745 The value has no effect if the system has no ptys or if all ptys are busy:\n\
3746 then a pipe is used in any case.\n\
3747 The value takes effect when `start-process' is called.");
3748 Vprocess_connection_type
= Qt
;
3750 defsubr (&Sprocessp
);
3751 defsubr (&Sget_process
);
3752 defsubr (&Sget_buffer_process
);
3753 defsubr (&Sdelete_process
);
3754 defsubr (&Sprocess_status
);
3755 defsubr (&Sprocess_exit_status
);
3756 defsubr (&Sprocess_id
);
3757 defsubr (&Sprocess_name
);
3758 defsubr (&Sprocess_tty_name
);
3759 defsubr (&Sprocess_command
);
3760 defsubr (&Sset_process_buffer
);
3761 defsubr (&Sprocess_buffer
);
3762 defsubr (&Sprocess_mark
);
3763 defsubr (&Sset_process_filter
);
3764 defsubr (&Sprocess_filter
);
3765 defsubr (&Sset_process_sentinel
);
3766 defsubr (&Sset_process_window_size
);
3767 defsubr (&Sprocess_sentinel
);
3768 defsubr (&Sprocess_kill_without_query
);
3769 defsubr (&Slist_processes
);
3770 defsubr (&Sprocess_list
);
3771 defsubr (&Sstart_process
);
3773 defsubr (&Sopen_network_stream
);
3774 #endif /* HAVE_SOCKETS */
3775 defsubr (&Saccept_process_output
);
3776 defsubr (&Sprocess_send_region
);
3777 defsubr (&Sprocess_send_string
);
3778 defsubr (&Sinterrupt_process
);
3779 defsubr (&Skill_process
);
3780 defsubr (&Squit_process
);
3781 defsubr (&Sstop_process
);
3782 defsubr (&Scontinue_process
);
3783 defsubr (&Sprocess_send_eof
);
3784 defsubr (&Ssignal_process
);
3785 defsubr (&Swaiting_for_user_input_p
);
3786 /* defsubr (&Sprocess_connection); */
3790 #else /* not subprocesses */
3792 #include <sys/types.h>
3796 #include "systime.h"
3797 #include "termopts.h"
3798 #include "sysselect.h"
3800 extern int frame_garbaged
;
3802 extern EMACS_TIME
timer_check ();
3803 extern int timers_run
;
3805 /* As described above, except assuming that there are no subprocesses:
3807 Wait for timeout to elapse and/or keyboard input to be available.
3810 timeout in seconds, or
3811 zero for no limit, or
3812 -1 means gobble data immediately available but don't wait for any.
3814 read_kbd is a Lisp_Object:
3815 0 to ignore keyboard input, or
3816 1 to return when input is available, or
3817 -1 means caller will actually read the input, so don't throw to
3819 a cons cell, meaning wait until its car is non-nil
3820 (and gobble terminal input into the buffer if any arrives), or
3821 We know that read_kbd will never be a Lisp_Process, since
3822 `subprocesses' isn't defined.
3824 do_display != 0 means redisplay should be done to show subprocess
3825 output that arrives.
3827 Return true iff we received input from any process. */
3830 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
3831 int time_limit
, microsecs
;
3832 Lisp_Object read_kbd
;
3835 EMACS_TIME end_time
, timeout
;
3836 SELECT_TYPE waitchannels
;
3838 Lisp_Object
*wait_for_cell
= 0;
3840 /* If waiting for non-nil in a cell, record where. */
3841 if (CONSP (read_kbd
))
3843 wait_for_cell
= &XCONS (read_kbd
)->car
;
3844 XSETFASTINT (read_kbd
, 0);
3847 /* What does time_limit really mean? */
3848 if (time_limit
|| microsecs
)
3850 if (time_limit
== -1)
3851 /* In fact, it's zero. */
3852 EMACS_SET_SECS_USECS (timeout
, 0, 0);
3854 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
3856 /* How far in the future is that? */
3857 EMACS_GET_TIME (end_time
);
3858 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
3861 /* It's infinite. */
3862 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
3864 /* Turn off periodic alarms (in case they are in use)
3865 because the select emulator uses alarms. */
3871 int timeout_reduced_for_timers
= 0;
3873 /* If calling from keyboard input, do not quit
3874 since we want to return C-g as an input character.
3875 Otherwise, do pending quit if requested. */
3876 if (XINT (read_kbd
) >= 0)
3879 /* Exit now if the cell we're waiting for became non-nil. */
3880 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
3883 /* Compute time from now till when time limit is up */
3884 /* Exit if already run out */
3885 if (time_limit
> 0 || microsecs
)
3887 EMACS_GET_TIME (timeout
);
3888 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
3889 if (EMACS_TIME_NEG_P (timeout
))
3893 /* If our caller will not immediately handle keyboard events,
3894 run timer events directly.
3895 (Callers that will immediately read keyboard events
3896 call timer_delay on their own.) */
3897 if (! wait_for_cell
)
3899 EMACS_TIME timer_delay
;
3903 old_timers_run
= timers_run
;
3904 timer_delay
= timer_check (1);
3905 if (timers_run
!= old_timers_run
&& do_display
)
3907 redisplay_preserve_echo_area ();
3908 /* We must retry, since a timer may have requeued itself
3909 and that could alter the time delay. */
3913 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
3915 EMACS_TIME difference
;
3916 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
3917 if (EMACS_TIME_NEG_P (difference
))
3919 timeout
= timer_delay
;
3920 timeout_reduced_for_timers
= 1;
3925 /* Cause C-g and alarm signals to take immediate action,
3926 and cause input available signals to zero out timeout. */
3927 if (XINT (read_kbd
) < 0)
3928 set_waiting_for_input (&timeout
);
3930 /* Wait till there is something to do. */
3932 if (! XINT (read_kbd
) && wait_for_cell
== 0)
3933 FD_ZERO (&waitchannels
);
3935 FD_SET (0, &waitchannels
);
3937 /* If a frame has been newly mapped and needs updating,
3938 reprocess its display stuff. */
3939 if (frame_garbaged
&& do_display
)
3941 clear_waiting_for_input ();
3942 redisplay_preserve_echo_area ();
3943 if (XINT (read_kbd
) < 0)
3944 set_waiting_for_input (&timeout
);
3947 if (XINT (read_kbd
) && detect_input_pending ())
3950 FD_ZERO (&waitchannels
);
3953 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
3958 /* Make C-g and alarm signals set flags again */
3959 clear_waiting_for_input ();
3961 /* If we woke up due to SIGWINCH, actually change size now. */
3962 do_pending_window_change ();
3964 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
3965 /* We waited the full specified time, so return now. */
3970 /* If the system call was interrupted, then go around the
3972 if (xerrno
== EINTR
)
3973 FD_ZERO (&waitchannels
);
3975 error ("select error: %s", strerror (xerrno
));
3978 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
3979 /* System sometimes fails to deliver SIGIO. */
3980 kill (getpid (), SIGIO
);
3983 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
3984 kill (getpid (), SIGIO
);
3987 /* Check for keyboard input */
3989 if ((XINT (read_kbd
) != 0)
3990 && detect_input_pending_run_timers (do_display
))
3992 swallow_events (do_display
);
3993 if (detect_input_pending_run_timers (do_display
))
3997 /* If wait_for_cell. check for keyboard input
3998 but don't run any timers.
3999 ??? (It seems wrong to me to check for keyboard
4000 input at all when wait_for_cell, but the code
4001 has been this way since July 1994.
4002 Try changing this after version 19.31.) */
4004 && detect_input_pending ())
4006 swallow_events (do_display
);
4007 if (detect_input_pending ())
4011 /* Exit now if the cell we're waiting for became non-nil. */
4012 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
4022 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
4023 /* Don't confuse make-docfile by having two doc strings for this function.
4024 make-docfile does not pay attention to #if, for good reason! */
4027 register Lisp_Object name
;
4032 /* Kill all processes associated with `buffer'.
4033 If `buffer' is nil, kill all processes.
4034 Since we have no subprocesses, this does nothing. */
4036 kill_buffer_processes (buffer
)
4047 defsubr (&Sget_buffer_process
);
4051 #endif /* not subprocesses */