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 */
1259 pipe_with_inherited_out (sv
);
1263 pipe_with_inherited_in (sv
);
1266 #else /* not WINDOWSNT */
1273 #endif /* not WINDOWSNT */
1275 #endif /* not SKTPAIR */
1278 /* Replaced by close_process_descs */
1279 set_exclusive_use (inchannel
);
1280 set_exclusive_use (outchannel
);
1283 /* Stride people say it's a mystery why this is needed
1284 as well as the O_NDELAY, but that it fails without this. */
1285 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1288 ioctl (inchannel
, FIONBIO
, &one
);
1293 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1294 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1297 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1298 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1302 /* Record this as an active process, with its channels.
1303 As a result, child_setup will close Emacs's side of the pipes. */
1304 chan_process
[inchannel
] = process
;
1305 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1306 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1307 /* Record the tty descriptor used in the subprocess. */
1309 XPROCESS (process
)->subtty
= Qnil
;
1311 XSETFASTINT (XPROCESS (process
)->subtty
, forkin
);
1312 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1313 XPROCESS (process
)->status
= Qrun
;
1315 /* Delay interrupts until we have a chance to store
1316 the new fork's pid in its process structure */
1317 #ifdef POSIX_SIGNALS
1318 sigemptyset (&blocked
);
1320 sigaddset (&blocked
, SIGCHLD
);
1323 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1324 this sets the parent's signal handlers as well as the child's.
1325 So delay all interrupts whose handlers the child might munge,
1326 and record the current handlers so they can be restored later. */
1327 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1328 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1330 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1332 #endif /* HAVE_VFORK */
1333 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1334 #else /* !POSIX_SIGNALS */
1338 #else /* not BSD4_1 */
1339 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1340 sigsetmask (sigmask (SIGCHLD
));
1341 #else /* ordinary USG */
1343 sigchld_deferred
= 0;
1344 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1346 #endif /* ordinary USG */
1347 #endif /* not BSD4_1 */
1348 #endif /* SIGCHLD */
1349 #endif /* !POSIX_SIGNALS */
1351 FD_SET (inchannel
, &input_wait_mask
);
1352 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1353 if (inchannel
> max_process_desc
)
1354 max_process_desc
= inchannel
;
1356 /* Until we store the proper pid, enable sigchld_handler
1357 to recognize an unknown pid as standing for this process.
1358 It is very important not to let this `marker' value stay
1359 in the table after this function has returned; if it does
1360 it might cause call-process to hang and subsequent asynchronous
1361 processes to get their return values scrambled. */
1362 XSETINT (XPROCESS (process
)->pid
, -1);
1365 /* child_setup must clobber environ on systems with true vfork.
1366 Protect it from permanent change. */
1367 char **save_environ
= environ
;
1372 #endif /* not WINDOWSNT */
1374 int xforkin
= forkin
;
1375 int xforkout
= forkout
;
1377 #if 0 /* This was probably a mistake--it duplicates code later on,
1378 but fails to handle all the cases. */
1379 /* Make sure SIGCHLD is not blocked in the child. */
1380 sigsetmask (SIGEMPTYMASK
);
1383 /* Make the pty be the controlling terminal of the process. */
1385 /* First, disconnect its current controlling terminal. */
1387 /* We tried doing setsid only if pty_flag, but it caused
1388 process_set_signal to fail on SGI when using a pipe. */
1390 /* Make the pty's terminal the controlling terminal. */
1394 /* We ignore the return value
1395 because faith@cs.unc.edu says that is necessary on Linux. */
1396 ioctl (xforkin
, TIOCSCTTY
, 0);
1399 #else /* not HAVE_SETSID */
1401 /* It's very important to call setpgrp here and no time
1402 afterwards. Otherwise, we lose our controlling tty which
1403 is set when we open the pty. */
1406 #endif /* not HAVE_SETSID */
1407 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1408 if (pty_flag
&& xforkin
>= 0)
1411 tcgetattr (xforkin
, &t
);
1413 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1414 write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1417 #if defined (NTTYDISC) && defined (TIOCSETD)
1418 if (pty_flag
&& xforkin
>= 0)
1420 /* Use new line discipline. */
1421 int ldisc
= NTTYDISC
;
1422 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1427 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1428 can do TIOCSPGRP only to the process's controlling tty. */
1431 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1432 I can't test it since I don't have 4.3. */
1433 int j
= open ("/dev/tty", O_RDWR
, 0);
1434 ioctl (j
, TIOCNOTTY
, 0);
1437 /* In order to get a controlling terminal on some versions
1438 of BSD, it is necessary to put the process in pgrp 0
1439 before it opens the terminal. */
1447 #endif /* TIOCNOTTY */
1449 #if !defined (RTU) && !defined (UNIPLUS)
1450 /*** There is a suggestion that this ought to be a
1451 conditional on TIOCSPGRP. */
1452 /* Now close the pty (if we had it open) and reopen it.
1453 This makes the pty the controlling terminal of the subprocess. */
1456 #ifdef SET_CHILD_PTY_PGRP
1457 int pgrp
= getpid ();
1460 /* I wonder if close (open (pty_name, ...)) would work? */
1463 xforkout
= xforkin
= open (pty_name
, O_RDWR
, 0);
1467 write (1, "Couldn't open the pty terminal ", 31);
1468 write (1, pty_name
, strlen (pty_name
));
1473 #ifdef SET_CHILD_PTY_PGRP
1474 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1475 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1478 #endif /* not UNIPLUS and not RTU */
1479 #ifdef SETUP_SLAVE_PTY
1484 #endif /* SETUP_SLAVE_PTY */
1486 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1487 Now reenable it in the child, so it will die when we want it to. */
1489 signal (SIGHUP
, SIG_DFL
);
1491 #endif /* HAVE_PTYS */
1493 signal (SIGINT
, SIG_DFL
);
1494 signal (SIGQUIT
, SIG_DFL
);
1496 /* Stop blocking signals in the child. */
1497 #ifdef POSIX_SIGNALS
1498 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1499 #else /* !POSIX_SIGNALS */
1503 #else /* not BSD4_1 */
1504 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1505 sigsetmask (SIGEMPTYMASK
);
1506 #else /* ordinary USG */
1508 signal (SIGCHLD
, sigchld
);
1510 #endif /* ordinary USG */
1511 #endif /* not BSD4_1 */
1512 #endif /* SIGCHLD */
1513 #endif /* !POSIX_SIGNALS */
1516 child_setup_tty (xforkout
);
1518 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1519 new_argv
, 1, current_dir
);
1520 #else /* not WINDOWSNT */
1521 child_setup (xforkin
, xforkout
, xforkout
,
1522 new_argv
, 1, current_dir
);
1523 #endif /* not WINDOWSNT */
1525 environ
= save_environ
;
1528 /* This runs in the Emacs process. */
1533 if (forkin
!= forkout
&& forkout
>= 0)
1538 /* vfork succeeded. */
1539 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
1542 register_child (pid
, inchannel
);
1543 #endif /* WINDOWSNT */
1545 /* If the subfork execv fails, and it exits,
1546 this close hangs. I don't know why.
1547 So have an interrupt jar it loose. */
1549 signal (SIGALRM
, create_process_1
);
1551 XPROCESS (process
)->subtty
= Qnil
;
1556 if (forkin
!= forkout
&& forkout
>= 0)
1561 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1564 XPROCESS (process
)->tty_name
= Qnil
;
1567 /* Restore the signal state whether vfork succeeded or not.
1568 (We will signal an error, below, if it failed.) */
1569 #ifdef POSIX_SIGNALS
1571 /* Restore the parent's signal handlers. */
1572 sigaction (SIGINT
, &sigint_action
, 0);
1573 sigaction (SIGQUIT
, &sigquit_action
, 0);
1575 sigaction (SIGHUP
, &sighup_action
, 0);
1577 #endif /* HAVE_VFORK */
1578 /* Stop blocking signals in the parent. */
1579 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1580 #else /* !POSIX_SIGNALS */
1584 #else /* not BSD4_1 */
1585 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1586 sigsetmask (SIGEMPTYMASK
);
1587 #else /* ordinary USG */
1589 signal (SIGCHLD
, sigchld
);
1590 /* Now really handle any of these signals
1591 that came in during this function. */
1592 if (sigchld_deferred
)
1593 kill (getpid (), SIGCHLD
);
1595 #endif /* ordinary USG */
1596 #endif /* not BSD4_1 */
1597 #endif /* SIGCHLD */
1598 #endif /* !POSIX_SIGNALS */
1600 /* Now generate the error if vfork failed. */
1602 report_file_error ("Doing vfork", Qnil
);
1604 #endif /* not VMS */
1608 /* open a TCP network connection to a given HOST/SERVICE. Treated
1609 exactly like a normal process when reading and writing. Only
1610 differences are in status display and process deletion. A network
1611 connection has no PID; you cannot signal it. All you can do is
1612 deactivate and close it via delete-process */
1614 DEFUN ("open-network-stream", Fopen_network_stream
, Sopen_network_stream
,
1616 "Open a TCP connection for a service to a host.\n\
1617 Returns a subprocess-object to represent the connection.\n\
1618 Input and output work as for subprocesses; `delete-process' closes it.\n\
1619 Args are NAME BUFFER HOST SERVICE.\n\
1620 NAME is name for process. It is modified if necessary to make it unique.\n\
1621 BUFFER is the buffer (or buffer-name) to associate with the process.\n\
1622 Process output goes at end of that buffer, unless you specify\n\
1623 an output stream or filter function to handle the output.\n\
1624 BUFFER may be also nil, meaning that this process is not associated\n\
1626 Third arg is name of the host to connect to, or its IP address.\n\
1627 Fourth arg SERVICE is name of the service desired, or an integer\n\
1628 specifying a port number to connect to.")
1629 (name
, buffer
, host
, service
)
1630 Lisp_Object name
, buffer
, host
, service
;
1634 struct sockaddr_in address
;
1635 struct servent
*svc_info
;
1636 struct hostent
*host_info_ptr
, host_info
;
1637 char *(addr_list
[2]);
1638 IN_ADDR numeric_addr
;
1642 struct hostent host_info_fixed
;
1643 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1645 int count
= specpdl_ptr
- specpdl
;
1647 GCPRO4 (name
, buffer
, host
, service
);
1648 CHECK_STRING (name
, 0);
1649 CHECK_STRING (host
, 0);
1650 if (INTEGERP (service
))
1651 port
= htons ((unsigned short) XINT (service
));
1654 CHECK_STRING (service
, 0);
1655 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
1657 error ("Unknown service \"%s\"", XSTRING (service
)->data
);
1658 port
= svc_info
->s_port
;
1661 /* Slow down polling to every ten seconds.
1662 Some kernels have a bug which causes retrying connect to fail
1663 after a connect. Polling can interfere with gethostbyname too. */
1664 #ifdef POLL_FOR_INPUT
1665 bind_polling_period (10);
1676 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
1679 if (! (host_info_ptr
== 0 && h_errno
== TRY_AGAIN
))
1682 Fsleep_for (make_number (1), Qnil
);
1684 if (host_info_ptr
== 0)
1685 /* Attempt to interpret host as numeric inet address */
1687 numeric_addr
= inet_addr ((char *) XSTRING (host
)->data
);
1688 if (NUMERIC_ADDR_ERROR
)
1689 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
1691 host_info_ptr
= &host_info
;
1692 host_info
.h_name
= 0;
1693 host_info
.h_aliases
= 0;
1694 host_info
.h_addrtype
= AF_INET
;
1696 /* Older machines have only one address slot called h_addr.
1697 Newer machines have h_addr_list, but #define h_addr to
1698 be its first element. */
1699 host_info
.h_addr_list
= &(addr_list
[0]);
1701 host_info
.h_addr
= (char*)(&numeric_addr
);
1703 /* numeric_addr isn't null-terminated; it has fixed length. */
1704 host_info
.h_length
= sizeof (numeric_addr
);
1707 bzero (&address
, sizeof address
);
1708 bcopy (host_info_ptr
->h_addr
, (char *) &address
.sin_addr
,
1709 host_info_ptr
->h_length
);
1710 address
.sin_family
= host_info_ptr
->h_addrtype
;
1711 address
.sin_port
= port
;
1713 s
= socket (host_info_ptr
->h_addrtype
, SOCK_STREAM
, 0);
1715 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1717 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
1718 when connect is interrupted. So let's not let it get interrupted.
1719 Note we do not turn off polling, because polling is only used
1720 when not interrupt_input, and thus not normally used on the systems
1721 which have this bug. On systems which use polling, there's no way
1722 to quit if polling is turned off. */
1723 if (interrupt_input
)
1731 if (connect (s
, (struct sockaddr
*) &address
, sizeof address
) == -1
1732 && errno
!= EISCONN
)
1740 if (errno
== EADDRINUSE
&& retry
< 20)
1742 /* A delay here is needed on some FreeBSD systems,
1743 and it is harmless, since this retrying takes time anyway
1744 and should be infrequent. */
1745 Fsleep_for (make_number (1), Qnil
);
1752 if (interrupt_input
)
1756 report_file_error ("connection failed",
1757 Fcons (host
, Fcons (name
, Qnil
)));
1762 #ifdef POLL_FOR_INPUT
1763 unbind_to (count
, Qnil
);
1766 if (interrupt_input
)
1770 s
= connect_server (0);
1772 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1773 send_command (s
, C_PORT
, 0, "%s:%d", XSTRING (host
)->data
, ntohs (port
));
1774 send_command (s
, C_DUMB
, 1, 0);
1780 report_file_error ("error duplicating socket", Fcons (name
, Qnil
));
1783 buffer
= Fget_buffer_create (buffer
);
1784 proc
= make_process (name
);
1786 chan_process
[inch
] = proc
;
1789 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
1792 fcntl (inch
, F_SETFL
, O_NDELAY
);
1796 XPROCESS (proc
)->childp
= host
;
1797 XPROCESS (proc
)->command_channel_p
= Qnil
;
1798 XPROCESS (proc
)->buffer
= buffer
;
1799 XPROCESS (proc
)->sentinel
= Qnil
;
1800 XPROCESS (proc
)->filter
= Qnil
;
1801 XPROCESS (proc
)->command
= Qnil
;
1802 XPROCESS (proc
)->pid
= Qnil
;
1803 XSETINT (XPROCESS (proc
)->infd
, s
);
1804 XSETINT (XPROCESS (proc
)->outfd
, outch
);
1805 XPROCESS (proc
)->status
= Qrun
;
1806 FD_SET (inch
, &input_wait_mask
);
1807 FD_SET (inch
, &non_keyboard_wait_mask
);
1808 if (inch
> max_process_desc
)
1809 max_process_desc
= inch
;
1814 #endif /* HAVE_SOCKETS */
1816 deactivate_process (proc
)
1819 register int inchannel
, outchannel
;
1820 register struct Lisp_Process
*p
= XPROCESS (proc
);
1822 inchannel
= XINT (p
->infd
);
1823 outchannel
= XINT (p
->outfd
);
1827 /* Beware SIGCHLD hereabouts. */
1828 flush_pending_output (inchannel
);
1831 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
1832 sys$
dassgn (outchannel
);
1833 vs
= get_vms_process_pointer (p
->pid
);
1835 give_back_vms_process_stuff (vs
);
1839 if (outchannel
>= 0 && outchannel
!= inchannel
)
1843 XSETINT (p
->infd
, -1);
1844 XSETINT (p
->outfd
, -1);
1845 chan_process
[inchannel
] = Qnil
;
1846 FD_CLR (inchannel
, &input_wait_mask
);
1847 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
1848 if (inchannel
== max_process_desc
)
1851 /* We just closed the highest-numbered process input descriptor,
1852 so recompute the highest-numbered one now. */
1853 max_process_desc
= 0;
1854 for (i
= 0; i
< MAXDESC
; i
++)
1855 if (!NILP (chan_process
[i
]))
1856 max_process_desc
= i
;
1861 /* Close all descriptors currently in use for communication
1862 with subprocess. This is used in a newly-forked subprocess
1863 to get rid of irrelevant descriptors. */
1865 close_process_descs ()
1869 for (i
= 0; i
< MAXDESC
; i
++)
1871 Lisp_Object process
;
1872 process
= chan_process
[i
];
1873 if (!NILP (process
))
1875 int in
= XINT (XPROCESS (process
)->infd
);
1876 int out
= XINT (XPROCESS (process
)->outfd
);
1879 if (out
>= 0 && in
!= out
)
1886 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
1888 "Allow any pending output from subprocesses to be read by Emacs.\n\
1889 It is read into the process' buffers or given to their filter functions.\n\
1890 Non-nil arg PROCESS means do not return until some output has been received\n\
1892 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
1893 seconds and microseconds to wait; return after that much time whether\n\
1894 or not there is input.\n\
1895 Return non-nil iff we received any output before the timeout expired.")
1896 (process
, timeout
, timeout_msecs
)
1897 register Lisp_Object process
, timeout
, timeout_msecs
;
1902 if (! NILP (timeout_msecs
))
1904 CHECK_NUMBER (timeout_msecs
, 2);
1905 useconds
= XINT (timeout_msecs
);
1906 if (!INTEGERP (timeout
))
1907 XSETINT (timeout
, 0);
1910 int carry
= useconds
/ 1000000;
1912 XSETINT (timeout
, XINT (timeout
) + carry
);
1913 useconds
-= carry
* 1000000;
1915 /* I think this clause is necessary because C doesn't
1916 guarantee a particular rounding direction for negative
1920 XSETINT (timeout
, XINT (timeout
) - 1);
1921 useconds
+= 1000000;
1928 if (! NILP (timeout
))
1930 CHECK_NUMBER (timeout
, 1);
1931 seconds
= XINT (timeout
);
1932 if (seconds
< 0 || (seconds
== 0 && useconds
== 0))
1944 XSETFASTINT (process
, 0);
1947 (wait_reading_process_input (seconds
, useconds
, process
, 0)
1951 /* This variable is different from waiting_for_input in keyboard.c.
1952 It is used to communicate to a lisp process-filter/sentinel (via the
1953 function Fwaiting_for_user_input_p below) whether emacs was waiting
1954 for user-input when that process-filter was called.
1955 waiting_for_input cannot be used as that is by definition 0 when
1956 lisp code is being evalled.
1957 This is also used in record_asynch_buffer_change.
1958 For that purpose, this must be 0
1959 when not inside wait_reading_process_input. */
1960 static int waiting_for_user_input_p
;
1962 /* This is here so breakpoints can be put on it. */
1964 wait_reading_process_input_1 ()
1968 /* Read and dispose of subprocess output while waiting for timeout to
1969 elapse and/or keyboard input to be available.
1972 timeout in seconds, or
1973 zero for no limit, or
1974 -1 means gobble data immediately available but don't wait for any.
1977 an additional duration to wait, measured in microseconds.
1978 If this is nonzero and time_limit is 0, then the timeout
1979 consists of MICROSECS only.
1981 READ_KBD is a lisp value:
1982 0 to ignore keyboard input, or
1983 1 to return when input is available, or
1984 -1 meaning caller will actually read the input, so don't throw to
1985 the quit handler, or
1986 a cons cell, meaning wait until its car is non-nil
1987 (and gobble terminal input into the buffer if any arrives), or
1988 a process object, meaning wait until something arrives from that
1989 process. The return value is true iff we read some input from
1992 DO_DISPLAY != 0 means redisplay should be done to show subprocess
1993 output that arrives.
1995 If READ_KBD is a pointer to a struct Lisp_Process, then the
1996 function returns true iff we received input from that process
1997 before the timeout elapsed.
1998 Otherwise, return true iff we received input from any process. */
2000 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
2001 int time_limit
, microsecs
;
2002 Lisp_Object read_kbd
;
2005 register int channel
, nfds
, m
;
2006 static SELECT_TYPE Available
;
2009 EMACS_TIME timeout
, end_time
, garbage
;
2011 int wait_channel
= -1;
2012 struct Lisp_Process
*wait_proc
= 0;
2013 int got_some_input
= 0;
2014 Lisp_Object
*wait_for_cell
= 0;
2016 FD_ZERO (&Available
);
2018 /* If read_kbd is a process to watch, set wait_proc and wait_channel
2020 if (PROCESSP (read_kbd
))
2022 wait_proc
= XPROCESS (read_kbd
);
2023 wait_channel
= XINT (wait_proc
->infd
);
2024 XSETFASTINT (read_kbd
, 0);
2027 /* If waiting for non-nil in a cell, record where. */
2028 if (CONSP (read_kbd
))
2030 wait_for_cell
= &XCONS (read_kbd
)->car
;
2031 XSETFASTINT (read_kbd
, 0);
2034 waiting_for_user_input_p
= XINT (read_kbd
);
2036 /* Since we may need to wait several times,
2037 compute the absolute time to return at. */
2038 if (time_limit
|| microsecs
)
2040 EMACS_GET_TIME (end_time
);
2041 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
2042 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
2047 int timeout_reduced_for_timers
= 0;
2049 /* If calling from keyboard input, do not quit
2050 since we want to return C-g as an input character.
2051 Otherwise, do pending quit if requested. */
2052 if (XINT (read_kbd
) >= 0)
2055 /* Exit now if the cell we're waiting for became non-nil. */
2056 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2059 /* Compute time from now till when time limit is up */
2060 /* Exit if already run out */
2061 if (time_limit
== -1)
2063 /* -1 specified for timeout means
2064 gobble output available now
2065 but don't wait at all. */
2067 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2069 else if (time_limit
|| microsecs
)
2071 EMACS_GET_TIME (timeout
);
2072 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
2073 if (EMACS_TIME_NEG_P (timeout
))
2078 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
2081 /* If our caller will not immediately handle keyboard events,
2082 run timer events directly.
2083 (Callers that will immediately read keyboard events
2084 call timer_delay on their own.) */
2087 EMACS_TIME timer_delay
;
2091 old_timers_run
= timers_run
;
2092 timer_delay
= timer_check (1);
2093 if (timers_run
!= old_timers_run
&& do_display
)
2095 redisplay_preserve_echo_area ();
2096 /* We must retry, since a timer may have requeued itself
2097 and that could alter the time_delay. */
2101 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
2103 EMACS_TIME difference
;
2104 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
2105 if (EMACS_TIME_NEG_P (difference
))
2107 timeout
= timer_delay
;
2108 timeout_reduced_for_timers
= 1;
2113 /* This is so a breakpoint can be put here. */
2114 wait_reading_process_input_1 ();
2118 /* Cause C-g and alarm signals to take immediate action,
2119 and cause input available signals to zero out timeout.
2121 It is important that we do this before checking for process
2122 activity. If we get a SIGCHLD after the explicit checks for
2123 process activity, timeout is the only way we will know. */
2124 if (XINT (read_kbd
) < 0)
2125 set_waiting_for_input (&timeout
);
2127 /* If status of something has changed, and no input is
2128 available, notify the user of the change right away. After
2129 this explicit check, we'll let the SIGCHLD handler zap
2130 timeout to get our attention. */
2131 if (update_tick
!= process_tick
&& do_display
)
2133 Atemp
= input_wait_mask
;
2134 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2135 if ((select (MAXDESC
, &Atemp
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2139 /* It's okay for us to do this and then continue with
2140 the loop, since timeout has already been zeroed out. */
2141 clear_waiting_for_input ();
2146 /* Don't wait for output from a non-running process. */
2147 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
2148 update_status (wait_proc
);
2150 && ! EQ (wait_proc
->status
, Qrun
))
2152 clear_waiting_for_input ();
2156 /* Wait till there is something to do */
2158 if (! XINT (read_kbd
) && wait_for_cell
== 0)
2159 Available
= non_keyboard_wait_mask
;
2161 Available
= input_wait_mask
;
2163 /* If frame size has changed or the window is newly mapped,
2164 redisplay now, before we start to wait. There is a race
2165 condition here; if a SIGIO arrives between now and the select
2166 and indicates that a frame is trashed, the select may block
2167 displaying a trashed screen. */
2168 if (frame_garbaged
&& do_display
)
2170 clear_waiting_for_input ();
2171 redisplay_preserve_echo_area ();
2172 if (XINT (read_kbd
) < 0)
2173 set_waiting_for_input (&timeout
);
2176 if (XINT (read_kbd
) && detect_input_pending ())
2179 FD_ZERO (&Available
);
2182 nfds
= select (MAXDESC
, &Available
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2187 /* Make C-g and alarm signals set flags again */
2188 clear_waiting_for_input ();
2190 /* If we woke up due to SIGWINCH, actually change size now. */
2191 do_pending_window_change ();
2193 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
2194 /* We wanted the full specified time, so return now. */
2198 if (xerrno
== EINTR
)
2199 FD_ZERO (&Available
);
2201 /* Ultrix select seems to return ENOMEM when it is
2202 interrupted. Treat it just like EINTR. Bleah. Note
2203 that we want to test for the "ultrix" CPP symbol, not
2204 "__ultrix__"; the latter is only defined under GCC, but
2205 not by DEC's bundled CC. -JimB */
2206 else if (xerrno
== ENOMEM
)
2207 FD_ZERO (&Available
);
2210 /* This happens for no known reason on ALLIANT.
2211 I am guessing that this is the right response. -- RMS. */
2212 else if (xerrno
== EFAULT
)
2213 FD_ZERO (&Available
);
2215 else if (xerrno
== EBADF
)
2218 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
2219 the child's closure of the pts gives the parent a SIGHUP, and
2220 the ptc file descriptor is automatically closed,
2221 yielding EBADF here or at select() call above.
2222 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
2223 in m/ibmrt-aix.h), and here we just ignore the select error.
2224 Cleanup occurs c/o status_notify after SIGCLD. */
2225 FD_ZERO (&Available
); /* Cannot depend on values returned */
2231 error ("select error: %s", strerror (xerrno
));
2233 #if defined(sun) && !defined(USG5_4)
2234 else if (nfds
> 0 && keyboard_bit_set (&Available
)
2236 /* System sometimes fails to deliver SIGIO.
2238 David J. Mackenzie says that Emacs doesn't compile under
2239 Solaris if this code is enabled, thus the USG5_4 in the CPP
2240 conditional. "I haven't noticed any ill effects so far.
2241 If you find a Solaris expert somewhere, they might know
2243 kill (getpid (), SIGIO
);
2246 /* Check for keyboard input */
2247 /* If there is any, return immediately
2248 to give it higher priority than subprocesses */
2250 if (XINT (read_kbd
) < 0 && detect_input_pending ())
2252 swallow_events (do_display
);
2253 if (detect_input_pending ())
2257 if ((XINT (read_kbd
) > 0 || wait_for_cell
)
2258 && detect_input_pending_run_timers (do_display
))
2260 swallow_events (do_display
);
2261 if (detect_input_pending_run_timers (do_display
))
2265 /* Exit now if the cell we're waiting for became non-nil. */
2266 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2270 /* If we think we have keyboard input waiting, but didn't get SIGIO
2271 go read it. This can happen with X on BSD after logging out.
2272 In that case, there really is no input and no SIGIO,
2273 but select says there is input. */
2275 if (XINT (read_kbd
) && interrupt_input
2276 && (keyboard_bit_set (&Available
)))
2277 kill (getpid (), SIGIO
);
2281 got_some_input
|= nfds
> 0;
2283 /* If checking input just got us a size-change event from X,
2284 obey it now if we should. */
2285 if (XINT (read_kbd
) || wait_for_cell
)
2286 do_pending_window_change ();
2288 /* Check for data from a process. */
2289 /* Really FIRST_PROC_DESC should be 0 on Unix,
2290 but this is safer in the short run. */
2291 for (channel
= 0; channel
<= max_process_desc
; channel
++)
2293 if (FD_ISSET (channel
, &Available
)
2294 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
2298 /* If waiting for this channel, arrange to return as
2299 soon as no more input to be processed. No more
2301 if (wait_channel
== channel
)
2307 proc
= chan_process
[channel
];
2311 /* Read data from the process, starting with our
2312 buffered-ahead character if we have one. */
2314 nread
= read_process_output (proc
, channel
);
2317 /* Since read_process_output can run a filter,
2318 which can call accept-process-output,
2319 don't try to read from any other processes
2320 before doing the select again. */
2321 FD_ZERO (&Available
);
2324 redisplay_preserve_echo_area ();
2327 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2331 else if (nread
== -1 && errno
== EAGAIN
)
2335 else if (nread
== -1 && errno
== EAGAIN
)
2337 /* Note that we cannot distinguish between no input
2338 available now and a closed pipe.
2339 With luck, a closed pipe will be accompanied by
2340 subprocess termination and SIGCHLD. */
2341 else if (nread
== 0 && !NETCONN_P (proc
))
2343 #endif /* O_NDELAY */
2344 #endif /* O_NONBLOCK */
2345 #endif /* EWOULDBLOCK */
2347 /* On some OSs with ptys, when the process on one end of
2348 a pty exits, the other end gets an error reading with
2349 errno = EIO instead of getting an EOF (0 bytes read).
2350 Therefore, if we get an error reading and errno =
2351 EIO, just continue, because the child process has
2352 exited and should clean itself up soon (e.g. when we
2354 else if (nread
== -1 && errno
== EIO
)
2356 #endif /* HAVE_PTYS */
2357 /* If we can detect process termination, don't consider the process
2358 gone just because its pipe is closed. */
2360 else if (nread
== 0 && !NETCONN_P (proc
))
2365 /* Preserve status of processes already terminated. */
2366 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2367 deactivate_process (proc
);
2368 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2369 update_status (XPROCESS (proc
));
2370 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2371 XPROCESS (proc
)->status
2372 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2375 } /* end for each file descriptor */
2376 } /* end while exit conditions not met */
2378 waiting_for_user_input_p
= 0;
2380 /* If calling from keyboard input, do not quit
2381 since we want to return C-g as an input character.
2382 Otherwise, do pending quit if requested. */
2383 if (XINT (read_kbd
) >= 0)
2385 /* Prevent input_pending from remaining set if we quit. */
2386 clear_input_pending ();
2390 return got_some_input
;
2393 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
2396 read_process_output_call (fun_and_args
)
2397 Lisp_Object fun_and_args
;
2399 return apply1 (XCONS (fun_and_args
)->car
, XCONS (fun_and_args
)->cdr
);
2403 read_process_output_error_handler (error
)
2406 cmd_error_internal (error
, "error in process filter: ");
2408 update_echo_area ();
2409 Fsleep_for (make_number (2), Qnil
);
2412 /* Read pending output from the process channel,
2413 starting with our buffered-ahead character if we have one.
2414 Yield number of characters read.
2416 This function reads at most 1024 characters.
2417 If you want to read all available subprocess output,
2418 you must call it repeatedly until it returns zero. */
2420 read_process_output (proc
, channel
)
2422 register int channel
;
2424 register int nchars
;
2430 register Lisp_Object outstream
;
2431 register struct buffer
*old
= current_buffer
;
2432 register struct Lisp_Process
*p
= XPROCESS (proc
);
2433 register int opoint
;
2436 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2438 vs
= get_vms_process_pointer (p
->pid
);
2442 return(0); /* Really weird if it does this */
2443 if (!(vs
->iosb
[0] & 1))
2444 return -1; /* I/O error */
2447 error ("Could not get VMS process pointer");
2448 chars
= vs
->inputBuffer
;
2449 nchars
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2452 start_vms_process_read (vs
); /* Crank up the next read on the process */
2453 return 1; /* Nothing worth printing, say we got 1 */
2457 if (proc_buffered_char
[channel
] < 0)
2459 nchars
= read_child_output (channel
, chars
, sizeof (chars
));
2461 nchars
= read (channel
, chars
, sizeof chars
);
2465 chars
[0] = proc_buffered_char
[channel
];
2466 proc_buffered_char
[channel
] = -1;
2468 nchars
= read_child_output (channel
, chars
+ 1, sizeof (chars
) - 1);
2470 nchars
= read (channel
, chars
+ 1, sizeof chars
- 1);
2475 nchars
= nchars
+ 1;
2477 #endif /* not VMS */
2479 if (nchars
<= 0) return nchars
;
2481 outstream
= p
->filter
;
2482 if (!NILP (outstream
))
2484 /* We inhibit quit here instead of just catching it so that
2485 hitting ^G when a filter happens to be running won't screw
2487 int count
= specpdl_ptr
- specpdl
;
2488 Lisp_Object odeactivate
;
2489 Lisp_Object obuffer
, okeymap
;
2491 /* No need to gcpro these, because all we do with them later
2492 is test them for EQness, and none of them should be a string. */
2493 odeactivate
= Vdeactivate_mark
;
2494 XSETBUFFER (obuffer
, current_buffer
);
2495 okeymap
= current_buffer
->keymap
;
2497 specbind (Qinhibit_quit
, Qt
);
2498 specbind (Qlast_nonmenu_event
, Qt
);
2500 running_asynch_code
= 1;
2501 internal_condition_case_1 (read_process_output_call
,
2504 Fcons (make_string (chars
,
2507 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
2508 read_process_output_error_handler
);
2509 running_asynch_code
= 0;
2510 restore_match_data ();
2512 /* Handling the process output should not deactivate the mark. */
2513 Vdeactivate_mark
= odeactivate
;
2515 #if 0 /* Call record_asynch_buffer_change unconditionally,
2516 because we might have changed minor modes or other things
2517 that affect key bindings. */
2518 if (! EQ (Fcurrent_buffer (), obuffer
)
2519 || ! EQ (current_buffer
->keymap
, okeymap
))
2521 /* But do it only if the caller is actually going to read events.
2522 Otherwise there's no need to make him wake up, and it could
2523 cause trouble (for example it would make Fsit_for return). */
2524 if (waiting_for_user_input_p
== -1)
2525 record_asynch_buffer_change ();
2528 start_vms_process_read (vs
);
2530 unbind_to (count
, Qnil
);
2534 /* If no filter, write into buffer if it isn't dead. */
2535 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2537 Lisp_Object old_read_only
;
2538 Lisp_Object old_begv
, old_zv
;
2539 Lisp_Object odeactivate
;
2541 odeactivate
= Vdeactivate_mark
;
2543 Fset_buffer (p
->buffer
);
2545 old_read_only
= current_buffer
->read_only
;
2546 XSETFASTINT (old_begv
, BEGV
);
2547 XSETFASTINT (old_zv
, ZV
);
2549 current_buffer
->read_only
= Qnil
;
2551 /* Insert new output into buffer
2552 at the current end-of-output marker,
2553 thus preserving logical ordering of input and output. */
2554 if (XMARKER (p
->mark
)->buffer
)
2555 SET_PT (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
));
2559 /* If the output marker is outside of the visible region, save
2560 the restriction and widen. */
2561 if (! (BEGV
<= point
&& point
<= ZV
))
2564 /* Make sure opoint floats ahead of any new text, just as point
2566 if (point
<= opoint
)
2569 /* Insert after old_begv, but before old_zv. */
2570 if (point
< XFASTINT (old_begv
))
2571 XSETFASTINT (old_begv
, XFASTINT (old_begv
) + nchars
);
2572 if (point
<= XFASTINT (old_zv
))
2573 XSETFASTINT (old_zv
, XFASTINT (old_zv
) + nchars
);
2575 /* Insert before markers in case we are inserting where
2576 the buffer's mark is, and the user's next command is Meta-y. */
2577 insert_before_markers (chars
, nchars
);
2578 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
2580 update_mode_lines
++;
2582 /* If the restriction isn't what it should be, set it. */
2583 if (XFASTINT (old_begv
) != BEGV
|| XFASTINT (old_zv
) != ZV
)
2584 Fnarrow_to_region (old_begv
, old_zv
);
2586 /* Handling the process output should not deactivate the mark. */
2587 Vdeactivate_mark
= odeactivate
;
2589 current_buffer
->read_only
= old_read_only
;
2591 set_buffer_internal (old
);
2594 start_vms_process_read (vs
);
2599 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
2601 "Returns non-nil if emacs is waiting for input from the user.\n\
2602 This is intended for use by asynchronous process output filters and sentinels.")
2605 return (waiting_for_user_input_p
? Qt
: Qnil
);
2608 /* Sending data to subprocess */
2610 jmp_buf send_process_frame
;
2613 send_process_trap ()
2619 longjmp (send_process_frame
, 1);
2622 /* Send some data to process PROC.
2623 BUF is the beginning of the data; LEN is the number of characters.
2624 OBJECT is the Lisp object that the data comes from. */
2626 send_process (proc
, buf
, len
, object
)
2627 volatile Lisp_Object proc
;
2632 /* Use volatile to protect variables from being clobbered by longjmp. */
2634 volatile unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
2637 struct Lisp_Process
*p
= XPROCESS (proc
);
2638 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2641 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2642 update_status (XPROCESS (proc
));
2643 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2644 error ("Process %s not running", procname
);
2647 vs
= get_vms_process_pointer (p
->pid
);
2649 error ("Could not find this process: %x", p
->pid
);
2650 else if (write_to_vms_process (vs
, buf
, len
))
2654 if (pty_max_bytes
== 0)
2656 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
2657 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
2659 if (pty_max_bytes
< 0)
2660 pty_max_bytes
= 250;
2662 pty_max_bytes
= 250;
2664 /* Deduct one, to leave space for the eof. */
2668 if (!setjmp (send_process_frame
))
2672 SIGTYPE (*old_sigpipe
)();
2675 /* Decide how much data we can send in one batch.
2676 Long lines need to be split into multiple batches. */
2677 if (!NILP (XPROCESS (proc
)->pty_flag
))
2679 /* Starting this at zero is always correct when not the first iteration
2680 because the previous iteration ended by sending C-d.
2681 It may not be correct for the first iteration
2682 if a partial line was sent in a separate send_process call.
2683 If that proves worth handling, we need to save linepos
2684 in the process object. */
2687 char *end
= buf
+ len
;
2689 /* Scan through this text for a line that is too long. */
2690 while (ptr
!= end
&& linepos
< pty_max_bytes
)
2698 /* If we found one, break the line there
2699 and put in a C-d to force the buffer through. */
2703 /* Send this batch, using one or more write calls. */
2706 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
2707 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
2708 signal (SIGPIPE
, old_sigpipe
);
2714 || errno
== EWOULDBLOCK
2720 /* Buffer is full. Wait, accepting input;
2721 that may allow the program
2722 to finish doing output and read more. */
2727 /* Running filters might relocate buffers or strings.
2728 Arrange to relocate BUF. */
2729 if (BUFFERP (object
))
2730 offset
= BUF_PTR_CHAR_POS (XBUFFER (object
),
2731 (unsigned char *) buf
);
2732 else if (STRINGP (object
))
2733 offset
= buf
- (char *) XSTRING (object
)->data
;
2735 XSETFASTINT (zero
, 0);
2736 wait_reading_process_input (1, 0, zero
, 0);
2738 if (BUFFERP (object
))
2739 buf
= (char *) BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
2740 else if (STRINGP (object
))
2741 buf
= offset
+ (char *) XSTRING (object
)->data
;
2746 /* This is a real error. */
2747 report_file_error ("writing to process", Fcons (proc
, Qnil
));
2754 /* If we sent just part of the string, put in an EOF
2755 to force it through, before we send the rest. */
2757 Fprocess_send_eof (proc
);
2762 XPROCESS (proc
)->raw_status_low
= Qnil
;
2763 XPROCESS (proc
)->raw_status_high
= Qnil
;
2764 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2765 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2766 deactivate_process (proc
);
2768 error ("Error writing to process %s; closed it", procname
);
2770 error ("SIGPIPE raised on process %s; closed it", procname
);
2775 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
2777 "Send current contents of region as input to PROCESS.\n\
2778 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2779 nil, indicating the current buffer's process.\n\
2780 Called from program, takes three arguments, PROCESS, START and END.\n\
2781 If the region is more than 500 characters long,\n\
2782 it is sent in several bunches. This may happen even for shorter regions.\n\
2783 Output from processes can arrive in between bunches.")
2784 (process
, start
, end
)
2785 Lisp_Object process
, start
, end
;
2790 proc
= get_process (process
);
2791 validate_region (&start
, &end
);
2793 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
2796 start1
= XINT (start
);
2797 send_process (proc
, &FETCH_CHAR (start1
), XINT (end
) - XINT (start
),
2798 Fcurrent_buffer ());
2803 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
2805 "Send PROCESS the contents of STRING as input.\n\
2806 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2807 nil, indicating the current buffer's process.\n\
2808 If STRING is more than 500 characters long,\n\
2809 it is sent in several bunches. This may happen even for shorter strings.\n\
2810 Output from processes can arrive in between bunches.")
2812 Lisp_Object process
, string
;
2815 CHECK_STRING (string
, 1);
2816 proc
= get_process (process
);
2817 send_process (proc
, XSTRING (string
)->data
, XSTRING (string
)->size
, string
);
2821 /* send a signal number SIGNO to PROCESS.
2822 CURRENT_GROUP means send to the process group that currently owns
2823 the terminal being used to communicate with PROCESS.
2824 This is used for various commands in shell mode.
2825 If NOMSG is zero, insert signal-announcements into process's buffers
2828 If we can, we try to signal PROCESS by sending control characters
2829 down the pty. This allows us to signal inferiors who have changed
2830 their uid, for which killpg would return an EPERM error. */
2833 process_send_signal (process
, signo
, current_group
, nomsg
)
2834 Lisp_Object process
;
2836 Lisp_Object current_group
;
2840 register struct Lisp_Process
*p
;
2844 proc
= get_process (process
);
2845 p
= XPROCESS (proc
);
2847 if (!EQ (p
->childp
, Qt
))
2848 error ("Process %s is not a subprocess",
2849 XSTRING (p
->name
)->data
);
2850 if (XINT (p
->infd
) < 0)
2851 error ("Process %s is not active",
2852 XSTRING (p
->name
)->data
);
2854 if (NILP (p
->pty_flag
))
2855 current_group
= Qnil
;
2857 /* If we are using pgrps, get a pgrp number and make it negative. */
2858 if (!NILP (current_group
))
2860 #ifdef SIGNALS_VIA_CHARACTERS
2861 /* If possible, send signals to the entire pgrp
2862 by sending an input character to it. */
2864 /* TERMIOS is the latest and bestest, and seems most likely to
2865 work. If the system has it, use it. */
2872 tcgetattr (XINT (p
->infd
), &t
);
2873 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2877 tcgetattr (XINT (p
->infd
), &t
);
2878 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2882 tcgetattr (XINT (p
->infd
), &t
);
2883 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
2884 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2886 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
2891 #else /* ! HAVE_TERMIOS */
2893 /* On Berkeley descendants, the following IOCTL's retrieve the
2894 current control characters. */
2895 #if defined (TIOCGLTC) && defined (TIOCGETC)
2903 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2904 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
2907 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2908 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
2912 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
2913 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
2915 #endif /* ! defined (SIGTSTP) */
2918 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2920 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
2927 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2928 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2931 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2932 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2936 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2937 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2939 #endif /* ! defined (SIGTSTP) */
2941 #else /* ! defined (TCGETA) */
2942 Your configuration files are messed up
.
2943 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
2944 you'd better be using one of the alternatives above! */
2945 #endif /* ! defined (TCGETA) */
2946 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2947 #endif /* ! defined HAVE_TERMIOS */
2948 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
2951 /* Get the pgrp using the tty itself, if we have that.
2952 Otherwise, use the pty to get the pgrp.
2953 On pfa systems, saka@pfu.fujitsu.co.JP writes:
2954 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
2955 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
2956 His patch indicates that if TIOCGPGRP returns an error, then
2957 we should just assume that p->pid is also the process group id. */
2961 if (!NILP (p
->subtty
))
2962 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
2964 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
2968 gid
= - XFASTINT (p
->pid
);
2969 #endif /* ! defined (pfa) */
2975 #else /* ! defined (TIOCGPGRP ) */
2976 /* Can't select pgrps on this system, so we know that
2977 the child itself heads the pgrp. */
2978 gid
= - XFASTINT (p
->pid
);
2979 #endif /* ! defined (TIOCGPGRP ) */
2982 gid
= - XFASTINT (p
->pid
);
2988 p
->raw_status_low
= Qnil
;
2989 p
->raw_status_high
= Qnil
;
2991 XSETINT (p
->tick
, ++process_tick
);
2995 #endif /* ! defined (SIGCONT) */
2998 send_process (proc
, "\003", 1, Qnil
); /* ^C */
3003 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
3008 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
3011 flush_pending_output (XINT (p
->infd
));
3015 /* If we don't have process groups, send the signal to the immediate
3016 subprocess. That isn't really right, but it's better than any
3017 obvious alternative. */
3020 kill (XFASTINT (p
->pid
), signo
);
3024 /* gid may be a pid, or minus a pgrp's number */
3026 if (!NILP (current_group
))
3027 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
3030 gid
= - XFASTINT (p
->pid
);
3033 #else /* ! defined (TIOCSIGSEND) */
3034 EMACS_KILLPG (-gid
, signo
);
3035 #endif /* ! defined (TIOCSIGSEND) */
3038 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
3039 "Interrupt process PROCESS. May be process or name of one.\n\
3040 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
3041 nil or no arg means current buffer's process.\n\
3042 Second arg CURRENT-GROUP non-nil means send signal to\n\
3043 the current process-group of the process's controlling terminal\n\
3044 rather than to the process's own process group.\n\
3045 If the process is a shell, this means interrupt current subjob\n\
3046 rather than the shell.")
3047 (process
, current_group
)
3048 Lisp_Object process
, current_group
;
3050 process_send_signal (process
, SIGINT
, current_group
, 0);
3054 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
3055 "Kill 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
, SIGKILL
, current_group
, 0);
3064 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
3065 "Send QUIT signal to 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
;
3070 process_send_signal (process
, SIGQUIT
, current_group
, 0);
3074 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
3075 "Stop process PROCESS. May be process or name of one.\n\
3076 See function `interrupt-process' for more details on usage.")
3077 (process
, current_group
)
3078 Lisp_Object process
, current_group
;
3081 error ("no SIGTSTP support");
3083 process_send_signal (process
, SIGTSTP
, current_group
, 0);
3088 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
3089 "Continue process PROCESS. May be process or name of one.\n\
3090 See function `interrupt-process' for more details on usage.")
3091 (process
, current_group
)
3092 Lisp_Object process
, current_group
;
3095 process_send_signal (process
, SIGCONT
, current_group
, 0);
3097 error ("no SIGCONT support");
3102 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
3103 2, 2, "nProcess number: \nnSignal code: ",
3104 "Send the process with process id PID the signal with code SIGCODE.\n\
3105 PID must be an integer. The process need not be a child of this Emacs.\n\
3106 SIGCODE may be an integer, or a symbol whose name is a signal name.")
3108 Lisp_Object pid
, sigcode
;
3110 CHECK_NUMBER (pid
, 0);
3112 #define handle_signal(NAME, VALUE) \
3113 else if (!strcmp (name, NAME)) \
3114 XSETINT (sigcode, VALUE)
3116 if (INTEGERP (sigcode
))
3120 unsigned char *name
;
3122 CHECK_SYMBOL (sigcode
, 1);
3123 name
= XSYMBOL (sigcode
)->name
->data
;
3128 handle_signal ("SIGHUP", SIGHUP
);
3131 handle_signal ("SIGINT", SIGINT
);
3134 handle_signal ("SIGQUIT", SIGQUIT
);
3137 handle_signal ("SIGILL", SIGILL
);
3140 handle_signal ("SIGABRT", SIGABRT
);
3143 handle_signal ("SIGEMT", SIGEMT
);
3146 handle_signal ("SIGKILL", SIGKILL
);
3149 handle_signal ("SIGFPE", SIGFPE
);
3152 handle_signal ("SIGBUS", SIGBUS
);
3155 handle_signal ("SIGSEGV", SIGSEGV
);
3158 handle_signal ("SIGSYS", SIGSYS
);
3161 handle_signal ("SIGPIPE", SIGPIPE
);
3164 handle_signal ("SIGALRM", SIGALRM
);
3167 handle_signal ("SIGTERM", SIGTERM
);
3170 handle_signal ("SIGURG", SIGURG
);
3173 handle_signal ("SIGSTOP", SIGSTOP
);
3176 handle_signal ("SIGTSTP", SIGTSTP
);
3179 handle_signal ("SIGCONT", SIGCONT
);
3182 handle_signal ("SIGCHLD", SIGCHLD
);
3185 handle_signal ("SIGTTIN", SIGTTIN
);
3188 handle_signal ("SIGTTOU", SIGTTOU
);
3191 handle_signal ("SIGIO", SIGIO
);
3194 handle_signal ("SIGXCPU", SIGXCPU
);
3197 handle_signal ("SIGXFSZ", SIGXFSZ
);
3200 handle_signal ("SIGVTALRM", SIGVTALRM
);
3203 handle_signal ("SIGPROF", SIGPROF
);
3206 handle_signal ("SIGWINCH", SIGWINCH
);
3209 handle_signal ("SIGINFO", SIGINFO
);
3212 handle_signal ("SIGUSR1", SIGUSR1
);
3215 handle_signal ("SIGUSR2", SIGUSR2
);
3218 error ("Undefined signal name %s", name
);
3221 #undef handle_signal
3224 /* Only works for kill-type signals */
3225 return make_number (win32_kill_process (XINT (pid
), XINT (sigcode
)));
3227 return make_number (kill (XINT (pid
), XINT (sigcode
)));
3231 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
3232 "Make PROCESS see end-of-file in its input.\n\
3233 Eof comes after any text already sent to it.\n\
3234 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3235 nil, indicating the current buffer's process.\n\
3236 If PROCESS is a network connection, or is a process communicating\n\
3237 through a pipe (as opposed to a pty), then you cannot send any more\n\
3238 text to PROCESS after you call this function.")
3240 Lisp_Object process
;
3244 proc
= get_process (process
);
3246 /* Make sure the process is really alive. */
3247 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3248 update_status (XPROCESS (proc
));
3249 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3250 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
3253 send_process (proc
, "\032", 1, Qnil
); /* ^z */
3255 if (!NILP (XPROCESS (proc
)->pty_flag
))
3256 send_process (proc
, "\004", 1, Qnil
);
3259 close (XINT (XPROCESS (proc
)->outfd
));
3260 XSETINT (XPROCESS (proc
)->outfd
, open (NULL_DEVICE
, O_WRONLY
));
3266 /* Kill all processes associated with `buffer'.
3267 If `buffer' is nil, kill all processes */
3269 kill_buffer_processes (buffer
)
3272 Lisp_Object tail
, proc
;
3274 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3276 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3277 if (GC_PROCESSP (proc
)
3278 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
3280 if (NETCONN_P (proc
))
3281 Fdelete_process (proc
);
3282 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
3283 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
3288 /* On receipt of a signal that a child status has changed,
3289 loop asking about children with changed statuses until
3290 the system says there are no more.
3291 All we do is change the status;
3292 we do not run sentinels or print notifications.
3293 That is saved for the next time keyboard input is done,
3294 in order to avoid timing errors. */
3296 /** WARNING: this can be called during garbage collection.
3297 Therefore, it must not be fooled by the presence of mark bits in
3300 /** USG WARNING: Although it is not obvious from the documentation
3301 in signal(2), on a USG system the SIGCLD handler MUST NOT call
3302 signal() before executing at least one wait(), otherwise the handler
3303 will be called again, resulting in an infinite loop. The relevant
3304 portion of the documentation reads "SIGCLD signals will be queued
3305 and the signal-catching function will be continually reentered until
3306 the queue is empty". Invoking signal() causes the kernel to reexamine
3307 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
3310 sigchld_handler (signo
)
3313 int old_errno
= errno
;
3315 register struct Lisp_Process
*p
;
3316 extern EMACS_TIME
*input_available_clear_time
;
3320 sigheld
|= sigbit (SIGCHLD
);
3332 #endif /* no WUNTRACED */
3333 /* Keep trying to get a status until we get a definitive result. */
3337 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
3339 while (pid
<= 0 && errno
== EINTR
);
3343 /* A real failure. We have done all our job, so return. */
3345 /* USG systems forget handlers when they are used;
3346 must reestablish each time */
3348 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
3351 sigheld
&= ~sigbit (SIGCHLD
);
3359 #endif /* no WNOHANG */
3361 /* Find the process that signaled us, and record its status. */
3364 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3366 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3367 p
= XPROCESS (proc
);
3368 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
3373 /* Look for an asynchronous process whose pid hasn't been filled
3376 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3378 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3379 p
= XPROCESS (proc
);
3380 if (INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
3385 /* Change the status of the process that was found. */
3388 union { int i
; WAITTYPE wt
; } u
;
3389 int clear_desc_flag
= 0;
3391 XSETINT (p
->tick
, ++process_tick
);
3393 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
3394 XSETINT (p
->raw_status_high
, u
.i
>> 16);
3396 /* If process has terminated, stop waiting for its output. */
3397 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
3398 && XINT (p
->infd
) >= 0)
3399 clear_desc_flag
= 1;
3401 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
3402 if (clear_desc_flag
)
3404 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
3405 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
3408 /* Tell wait_reading_process_input that it needs to wake up and
3410 if (input_available_clear_time
)
3411 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3414 /* There was no asynchronous process found for that id. Check
3415 if we have a synchronous process. */
3418 synch_process_alive
= 0;
3420 /* Report the status of the synchronous process. */
3422 synch_process_retcode
= WRETCODE (w
);
3423 else if (WIFSIGNALED (w
))
3425 int code
= WTERMSIG (w
);
3431 /* Suppress warning if the table has const char *. */
3432 signame
= (char *) sys_siglist
[code
];
3434 signame
= sys_errlist
[code
];
3438 signame
= "unknown";
3440 synch_process_death
= signame
;
3443 /* Tell wait_reading_process_input that it needs to wake up and
3445 if (input_available_clear_time
)
3446 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3449 /* On some systems, we must return right away.
3450 If any more processes want to signal us, we will
3452 Otherwise (on systems that have WNOHANG), loop around
3453 to use up all the processes that have something to tell us. */
3454 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT)
3456 signal (signo
, sigchld_handler
);
3460 #endif /* USG, but not HPUX with WNOHANG */
3466 exec_sentinel_unwind (data
)
3469 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
3474 exec_sentinel_error_handler (error
)
3477 cmd_error_internal (error
, "error in process sentinel: ");
3479 update_echo_area ();
3480 Fsleep_for (make_number (2), Qnil
);
3484 exec_sentinel (proc
, reason
)
3485 Lisp_Object proc
, reason
;
3487 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
3488 register struct Lisp_Process
*p
= XPROCESS (proc
);
3489 int count
= specpdl_ptr
- specpdl
;
3491 /* No need to gcpro these, because all we do with them later
3492 is test them for EQness, and none of them should be a string. */
3493 odeactivate
= Vdeactivate_mark
;
3494 XSETBUFFER (obuffer
, current_buffer
);
3495 okeymap
= current_buffer
->keymap
;
3497 sentinel
= p
->sentinel
;
3498 if (NILP (sentinel
))
3501 /* Zilch the sentinel while it's running, to avoid recursive invocations;
3502 assure that it gets restored no matter how the sentinel exits. */
3504 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
3505 /* Inhibit quit so that random quits don't screw up a running filter. */
3506 specbind (Qinhibit_quit
, Qt
);
3507 specbind (Qlast_nonmenu_event
, Qt
);
3509 running_asynch_code
= 1;
3510 internal_condition_case_1 (read_process_output_call
,
3512 Fcons (proc
, Fcons (reason
, Qnil
))),
3513 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
3514 exec_sentinel_error_handler
);
3515 running_asynch_code
= 0;
3516 restore_match_data ();
3518 Vdeactivate_mark
= odeactivate
;
3520 if (! EQ (Fcurrent_buffer (), obuffer
)
3521 || ! EQ (current_buffer
->keymap
, okeymap
))
3523 /* But do it only if the caller is actually going to read events.
3524 Otherwise there's no need to make him wake up, and it could
3525 cause trouble (for example it would make Fsit_for return). */
3526 if (waiting_for_user_input_p
== -1)
3527 record_asynch_buffer_change ();
3529 unbind_to (count
, Qnil
);
3532 /* Report all recent events of a change in process status
3533 (either run the sentinel or output a message).
3534 This is done while Emacs is waiting for keyboard input. */
3538 register Lisp_Object proc
, buffer
;
3539 Lisp_Object tail
, msg
;
3540 struct gcpro gcpro1
, gcpro2
;
3544 /* We need to gcpro tail; if read_process_output calls a filter
3545 which deletes a process and removes the cons to which tail points
3546 from Vprocess_alist, and then causes a GC, tail is an unprotected
3550 /* Set this now, so that if new processes are created by sentinels
3551 that we run, we get called again to handle their status changes. */
3552 update_tick
= process_tick
;
3554 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
3557 register struct Lisp_Process
*p
;
3559 proc
= Fcdr (Fcar (tail
));
3560 p
= XPROCESS (proc
);
3562 if (XINT (p
->tick
) != XINT (p
->update_tick
))
3564 XSETINT (p
->update_tick
, XINT (p
->tick
));
3566 /* If process is still active, read any output that remains. */
3567 if (XINT (p
->infd
) >= 0)
3568 while (! EQ (p
->filter
, Qt
)
3569 && read_process_output (proc
, XINT (p
->infd
)) > 0);
3573 /* Get the text to use for the message. */
3574 if (!NILP (p
->raw_status_low
))
3576 msg
= status_message (p
->status
);
3578 /* If process is terminated, deactivate it or delete it. */
3580 if (CONSP (p
->status
))
3581 symbol
= XCONS (p
->status
)->car
;
3583 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
3584 || EQ (symbol
, Qclosed
))
3586 if (delete_exited_processes
)
3587 remove_process (proc
);
3589 deactivate_process (proc
);
3592 /* Now output the message suitably. */
3593 if (!NILP (p
->sentinel
))
3594 exec_sentinel (proc
, msg
);
3595 /* Don't bother with a message in the buffer
3596 when a process becomes runnable. */
3597 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
3599 Lisp_Object ro
, tem
;
3600 struct buffer
*old
= current_buffer
;
3603 ro
= XBUFFER (buffer
)->read_only
;
3605 /* Avoid error if buffer is deleted
3606 (probably that's why the process is dead, too) */
3607 if (NILP (XBUFFER (buffer
)->name
))
3609 Fset_buffer (buffer
);
3611 /* Insert new output into buffer
3612 at the current end-of-output marker,
3613 thus preserving logical ordering of input and output. */
3614 if (XMARKER (p
->mark
)->buffer
)
3615 SET_PT (marker_position (p
->mark
));
3618 if (point
<= opoint
)
3619 opoint
+= XSTRING (msg
)->size
+ XSTRING (p
->name
)->size
+ 10;
3621 tem
= current_buffer
->read_only
;
3622 current_buffer
->read_only
= Qnil
;
3623 insert_string ("\nProcess ");
3624 Finsert (1, &p
->name
);
3625 insert_string (" ");
3627 current_buffer
->read_only
= tem
;
3628 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
3631 set_buffer_internal (old
);
3636 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
3637 redisplay_preserve_echo_area ();
3642 /* The first time this is called, assume keyboard input comes from DESC
3643 instead of from where we used to expect it.
3644 Subsequent calls mean assume input keyboard can come from DESC
3645 in addition to other places. */
3647 static int add_keyboard_wait_descriptor_called_flag
;
3650 add_keyboard_wait_descriptor (desc
)
3653 if (! add_keyboard_wait_descriptor_called_flag
)
3654 FD_CLR (0, &input_wait_mask
);
3655 add_keyboard_wait_descriptor_called_flag
= 1;
3656 FD_SET (desc
, &input_wait_mask
);
3657 if (desc
> max_keyboard_desc
)
3658 max_keyboard_desc
= desc
;
3661 /* From now on, do not expect DESC to give keyboard input. */
3664 delete_keyboard_wait_descriptor (desc
)
3668 int lim
= max_keyboard_desc
;
3670 FD_CLR (desc
, &input_wait_mask
);
3672 if (desc
== max_keyboard_desc
)
3673 for (fd
= 0; fd
< lim
; fd
++)
3674 if (FD_ISSET (fd
, &input_wait_mask
)
3675 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3676 max_keyboard_desc
= fd
;
3679 /* Return nonzero if *MASK has a bit set
3680 that corresponds to one of the keyboard input descriptors. */
3683 keyboard_bit_set (mask
)
3688 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
3689 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
3690 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3702 if (! noninteractive
|| initialized
)
3704 signal (SIGCHLD
, sigchld_handler
);
3707 FD_ZERO (&input_wait_mask
);
3708 FD_ZERO (&non_keyboard_wait_mask
);
3709 max_process_desc
= 0;
3711 FD_SET (0, &input_wait_mask
);
3713 Vprocess_alist
= Qnil
;
3714 for (i
= 0; i
< MAXDESC
; i
++)
3716 chan_process
[i
] = Qnil
;
3717 proc_buffered_char
[i
] = -1;
3724 stream_process
= intern ("stream");
3726 Qprocessp
= intern ("processp");
3727 staticpro (&Qprocessp
);
3728 Qrun
= intern ("run");
3730 Qstop
= intern ("stop");
3732 Qsignal
= intern ("signal");
3733 staticpro (&Qsignal
);
3735 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
3738 Qexit = intern ("exit");
3739 staticpro (&Qexit); */
3741 Qopen
= intern ("open");
3743 Qclosed
= intern ("closed");
3744 staticpro (&Qclosed
);
3746 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
3747 staticpro (&Qlast_nonmenu_event
);
3749 staticpro (&Vprocess_alist
);
3751 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
3752 "*Non-nil means delete processes immediately when they exit.\n\
3753 nil means don't delete them until `list-processes' is run.");
3755 delete_exited_processes
= 1;
3757 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
3758 "Control type of device used to communicate with subprocesses.\n\
3759 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
3760 The value has no effect if the system has no ptys or if all ptys are busy:\n\
3761 then a pipe is used in any case.\n\
3762 The value takes effect when `start-process' is called.");
3763 Vprocess_connection_type
= Qt
;
3765 defsubr (&Sprocessp
);
3766 defsubr (&Sget_process
);
3767 defsubr (&Sget_buffer_process
);
3768 defsubr (&Sdelete_process
);
3769 defsubr (&Sprocess_status
);
3770 defsubr (&Sprocess_exit_status
);
3771 defsubr (&Sprocess_id
);
3772 defsubr (&Sprocess_name
);
3773 defsubr (&Sprocess_tty_name
);
3774 defsubr (&Sprocess_command
);
3775 defsubr (&Sset_process_buffer
);
3776 defsubr (&Sprocess_buffer
);
3777 defsubr (&Sprocess_mark
);
3778 defsubr (&Sset_process_filter
);
3779 defsubr (&Sprocess_filter
);
3780 defsubr (&Sset_process_sentinel
);
3781 defsubr (&Sset_process_window_size
);
3782 defsubr (&Sprocess_sentinel
);
3783 defsubr (&Sprocess_kill_without_query
);
3784 defsubr (&Slist_processes
);
3785 defsubr (&Sprocess_list
);
3786 defsubr (&Sstart_process
);
3788 defsubr (&Sopen_network_stream
);
3789 #endif /* HAVE_SOCKETS */
3790 defsubr (&Saccept_process_output
);
3791 defsubr (&Sprocess_send_region
);
3792 defsubr (&Sprocess_send_string
);
3793 defsubr (&Sinterrupt_process
);
3794 defsubr (&Skill_process
);
3795 defsubr (&Squit_process
);
3796 defsubr (&Sstop_process
);
3797 defsubr (&Scontinue_process
);
3798 defsubr (&Sprocess_send_eof
);
3799 defsubr (&Ssignal_process
);
3800 defsubr (&Swaiting_for_user_input_p
);
3801 /* defsubr (&Sprocess_connection); */
3805 #else /* not subprocesses */
3807 #include <sys/types.h>
3811 #include "systime.h"
3812 #include "termopts.h"
3813 #include "sysselect.h"
3815 extern int frame_garbaged
;
3817 extern EMACS_TIME
timer_check ();
3818 extern int timers_run
;
3820 /* As described above, except assuming that there are no subprocesses:
3822 Wait for timeout to elapse and/or keyboard input to be available.
3825 timeout in seconds, or
3826 zero for no limit, or
3827 -1 means gobble data immediately available but don't wait for any.
3829 read_kbd is a Lisp_Object:
3830 0 to ignore keyboard input, or
3831 1 to return when input is available, or
3832 -1 means caller will actually read the input, so don't throw to
3834 We know that read_kbd will never be a Lisp_Process, since
3835 `subprocesses' isn't defined.
3837 do_display != 0 means redisplay should be done to show subprocess
3838 output that arrives.
3840 Return true iff we received input from any process. */
3843 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
3844 int time_limit
, microsecs
;
3845 Lisp_Object read_kbd
;
3848 EMACS_TIME end_time
, timeout
;
3849 SELECT_TYPE waitchannels
;
3852 /* What does time_limit really mean? */
3853 if (time_limit
|| microsecs
)
3855 if (time_limit
== -1)
3856 /* In fact, it's zero. */
3857 EMACS_SET_SECS_USECS (timeout
, 0, 0);
3859 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
3861 /* How far in the future is that? */
3862 EMACS_GET_TIME (end_time
);
3863 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
3866 /* It's infinite. */
3867 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
3869 /* Turn off periodic alarms (in case they are in use)
3870 because the select emulator uses alarms. */
3876 int timeout_reduced_for_timers
= 0;
3878 if (XINT (read_kbd
))
3879 FD_SET (0, &waitchannels
);
3881 FD_ZERO (&waitchannels
);
3883 /* If calling from keyboard input, do not quit
3884 since we want to return C-g as an input character.
3885 Otherwise, do pending quit if requested. */
3886 if (XINT (read_kbd
) >= 0)
3889 /* Compute time from now till when time limit is up */
3890 /* Exit if already run out */
3891 if (time_limit
> 0 || microsecs
)
3893 EMACS_GET_TIME (timeout
);
3894 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
3895 if (EMACS_TIME_NEG_P (timeout
))
3899 /* If our caller will not immediately handle keyboard events,
3900 run timer events directly.
3901 (Callers that will immediately read keyboard events
3902 call timer_delay on their own.) */
3903 if (XINT (read_kbd
) >= 0)
3905 EMACS_TIME timer_delay
;
3906 int old_timers_run
= timers_run
;
3907 timer_delay
= timer_check (1);
3908 if (timers_run
!= old_timers_run
&& do_display
)
3909 redisplay_preserve_echo_area ();
3910 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
3912 EMACS_TIME difference
;
3913 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
3914 if (EMACS_TIME_NEG_P (difference
))
3916 timeout
= timer_delay
;
3917 timeout_reduced_for_timers
= 1;
3922 /* Cause C-g and alarm signals to take immediate action,
3923 and cause input available signals to zero out timeout. */
3924 if (XINT (read_kbd
) < 0)
3925 set_waiting_for_input (&timeout
);
3927 /* If a frame has been newly mapped and needs updating,
3928 reprocess its display stuff. */
3929 if (frame_garbaged
&& do_display
)
3930 redisplay_preserve_echo_area ();
3932 if (XINT (read_kbd
) && detect_input_pending ())
3935 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
3940 /* Make C-g and alarm signals set flags again */
3941 clear_waiting_for_input ();
3943 /* If we woke up due to SIGWINCH, actually change size now. */
3944 do_pending_window_change ();
3946 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
3947 /* We waited the full specified time, so return now. */
3952 /* If the system call was interrupted, then go around the
3954 if (xerrno
== EINTR
)
3955 FD_ZERO (&waitchannels
);
3957 error ("select error: %s", strerror (xerrno
));
3960 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
3961 /* System sometimes fails to deliver SIGIO. */
3962 kill (getpid (), SIGIO
);
3965 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
3966 kill (getpid (), SIGIO
);
3969 /* Check for keyboard input */
3971 if (XINT (read_kbd
) < 0 && detect_input_pending ())
3973 swallow_events (do_display
);
3974 if (detect_input_pending ())
3978 if (XINT (read_kbd
) > 0
3979 && detect_input_pending_run_timers (do_display
))
3981 swallow_events (do_display
);
3982 if (detect_input_pending_run_timers (do_display
))
3993 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
3994 /* Don't confuse make-docfile by having two doc strings for this function.
3995 make-docfile does not pay attention to #if, for good reason! */
3998 register Lisp_Object name
;
4003 /* Kill all processes associated with `buffer'.
4004 If `buffer' is nil, kill all processes.
4005 Since we have no subprocesses, this does nothing. */
4007 kill_buffer_processes (buffer
)
4018 defsubr (&Sget_buffer_process
);
4022 #endif /* not subprocesses */