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;
2111 /* If time_limit is -1, we are not going to wait at all. */
2112 else if (time_limit
!= -1)
2114 /* This is so a breakpoint can be put here. */
2115 wait_reading_process_input_1 ();
2119 /* Cause C-g and alarm signals to take immediate action,
2120 and cause input available signals to zero out timeout.
2122 It is important that we do this before checking for process
2123 activity. If we get a SIGCHLD after the explicit checks for
2124 process activity, timeout is the only way we will know. */
2125 if (XINT (read_kbd
) < 0)
2126 set_waiting_for_input (&timeout
);
2128 /* If status of something has changed, and no input is
2129 available, notify the user of the change right away. After
2130 this explicit check, we'll let the SIGCHLD handler zap
2131 timeout to get our attention. */
2132 if (update_tick
!= process_tick
&& do_display
)
2134 Atemp
= input_wait_mask
;
2135 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2136 if ((select (MAXDESC
, &Atemp
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2140 /* It's okay for us to do this and then continue with
2141 the loop, since timeout has already been zeroed out. */
2142 clear_waiting_for_input ();
2147 /* Don't wait for output from a non-running process. */
2148 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
2149 update_status (wait_proc
);
2151 && ! EQ (wait_proc
->status
, Qrun
))
2153 clear_waiting_for_input ();
2157 /* Wait till there is something to do */
2159 if (! XINT (read_kbd
) && wait_for_cell
== 0)
2160 Available
= non_keyboard_wait_mask
;
2162 Available
= input_wait_mask
;
2164 /* If frame size has changed or the window is newly mapped,
2165 redisplay now, before we start to wait. There is a race
2166 condition here; if a SIGIO arrives between now and the select
2167 and indicates that a frame is trashed, the select may block
2168 displaying a trashed screen. */
2169 if (frame_garbaged
&& do_display
)
2171 clear_waiting_for_input ();
2172 redisplay_preserve_echo_area ();
2173 if (XINT (read_kbd
) < 0)
2174 set_waiting_for_input (&timeout
);
2177 if (XINT (read_kbd
) && detect_input_pending ())
2180 FD_ZERO (&Available
);
2183 nfds
= select (MAXDESC
, &Available
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2188 /* Make C-g and alarm signals set flags again */
2189 clear_waiting_for_input ();
2191 /* If we woke up due to SIGWINCH, actually change size now. */
2192 do_pending_window_change ();
2194 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
2195 /* We wanted the full specified time, so return now. */
2199 if (xerrno
== EINTR
)
2200 FD_ZERO (&Available
);
2202 /* Ultrix select seems to return ENOMEM when it is
2203 interrupted. Treat it just like EINTR. Bleah. Note
2204 that we want to test for the "ultrix" CPP symbol, not
2205 "__ultrix__"; the latter is only defined under GCC, but
2206 not by DEC's bundled CC. -JimB */
2207 else if (xerrno
== ENOMEM
)
2208 FD_ZERO (&Available
);
2211 /* This happens for no known reason on ALLIANT.
2212 I am guessing that this is the right response. -- RMS. */
2213 else if (xerrno
== EFAULT
)
2214 FD_ZERO (&Available
);
2216 else if (xerrno
== EBADF
)
2219 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
2220 the child's closure of the pts gives the parent a SIGHUP, and
2221 the ptc file descriptor is automatically closed,
2222 yielding EBADF here or at select() call above.
2223 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
2224 in m/ibmrt-aix.h), and here we just ignore the select error.
2225 Cleanup occurs c/o status_notify after SIGCLD. */
2226 FD_ZERO (&Available
); /* Cannot depend on values returned */
2232 error ("select error: %s", strerror (xerrno
));
2234 #if defined(sun) && !defined(USG5_4)
2235 else if (nfds
> 0 && keyboard_bit_set (&Available
)
2237 /* System sometimes fails to deliver SIGIO.
2239 David J. Mackenzie says that Emacs doesn't compile under
2240 Solaris if this code is enabled, thus the USG5_4 in the CPP
2241 conditional. "I haven't noticed any ill effects so far.
2242 If you find a Solaris expert somewhere, they might know
2244 kill (getpid (), SIGIO
);
2247 /* Check for keyboard input */
2248 /* If there is any, return immediately
2249 to give it higher priority than subprocesses */
2251 if ((XINT (read_kbd
) != 0 || wait_for_cell
)
2252 && detect_input_pending_run_timers (do_display
))
2254 swallow_events (do_display
);
2255 if (detect_input_pending_run_timers (do_display
))
2259 /* Exit now if the cell we're waiting for became non-nil. */
2260 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2264 /* If we think we have keyboard input waiting, but didn't get SIGIO
2265 go read it. This can happen with X on BSD after logging out.
2266 In that case, there really is no input and no SIGIO,
2267 but select says there is input. */
2269 if (XINT (read_kbd
) && interrupt_input
2270 && (keyboard_bit_set (&Available
)))
2271 kill (getpid (), SIGIO
);
2275 got_some_input
|= nfds
> 0;
2277 /* If checking input just got us a size-change event from X,
2278 obey it now if we should. */
2279 if (XINT (read_kbd
) || wait_for_cell
)
2280 do_pending_window_change ();
2282 /* Check for data from a process. */
2283 /* Really FIRST_PROC_DESC should be 0 on Unix,
2284 but this is safer in the short run. */
2285 for (channel
= 0; channel
<= max_process_desc
; channel
++)
2287 if (FD_ISSET (channel
, &Available
)
2288 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
2292 /* If waiting for this channel, arrange to return as
2293 soon as no more input to be processed. No more
2295 if (wait_channel
== channel
)
2301 proc
= chan_process
[channel
];
2305 /* Read data from the process, starting with our
2306 buffered-ahead character if we have one. */
2308 nread
= read_process_output (proc
, channel
);
2311 /* Since read_process_output can run a filter,
2312 which can call accept-process-output,
2313 don't try to read from any other processes
2314 before doing the select again. */
2315 FD_ZERO (&Available
);
2318 redisplay_preserve_echo_area ();
2321 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2325 else if (nread
== -1 && errno
== EAGAIN
)
2329 else if (nread
== -1 && errno
== EAGAIN
)
2331 /* Note that we cannot distinguish between no input
2332 available now and a closed pipe.
2333 With luck, a closed pipe will be accompanied by
2334 subprocess termination and SIGCHLD. */
2335 else if (nread
== 0 && !NETCONN_P (proc
))
2337 #endif /* O_NDELAY */
2338 #endif /* O_NONBLOCK */
2339 #endif /* EWOULDBLOCK */
2341 /* On some OSs with ptys, when the process on one end of
2342 a pty exits, the other end gets an error reading with
2343 errno = EIO instead of getting an EOF (0 bytes read).
2344 Therefore, if we get an error reading and errno =
2345 EIO, just continue, because the child process has
2346 exited and should clean itself up soon (e.g. when we
2348 else if (nread
== -1 && errno
== EIO
)
2350 #endif /* HAVE_PTYS */
2351 /* If we can detect process termination, don't consider the process
2352 gone just because its pipe is closed. */
2354 else if (nread
== 0 && !NETCONN_P (proc
))
2359 /* Preserve status of processes already terminated. */
2360 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2361 deactivate_process (proc
);
2362 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2363 update_status (XPROCESS (proc
));
2364 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2365 XPROCESS (proc
)->status
2366 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2369 } /* end for each file descriptor */
2370 } /* end while exit conditions not met */
2372 waiting_for_user_input_p
= 0;
2374 /* If calling from keyboard input, do not quit
2375 since we want to return C-g as an input character.
2376 Otherwise, do pending quit if requested. */
2377 if (XINT (read_kbd
) >= 0)
2379 /* Prevent input_pending from remaining set if we quit. */
2380 clear_input_pending ();
2384 return got_some_input
;
2387 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
2390 read_process_output_call (fun_and_args
)
2391 Lisp_Object fun_and_args
;
2393 return apply1 (XCONS (fun_and_args
)->car
, XCONS (fun_and_args
)->cdr
);
2397 read_process_output_error_handler (error
)
2400 cmd_error_internal (error
, "error in process filter: ");
2402 update_echo_area ();
2403 Fsleep_for (make_number (2), Qnil
);
2406 /* Read pending output from the process channel,
2407 starting with our buffered-ahead character if we have one.
2408 Yield number of characters read.
2410 This function reads at most 1024 characters.
2411 If you want to read all available subprocess output,
2412 you must call it repeatedly until it returns zero. */
2414 read_process_output (proc
, channel
)
2416 register int channel
;
2418 register int nchars
;
2424 register Lisp_Object outstream
;
2425 register struct buffer
*old
= current_buffer
;
2426 register struct Lisp_Process
*p
= XPROCESS (proc
);
2427 register int opoint
;
2430 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2432 vs
= get_vms_process_pointer (p
->pid
);
2436 return(0); /* Really weird if it does this */
2437 if (!(vs
->iosb
[0] & 1))
2438 return -1; /* I/O error */
2441 error ("Could not get VMS process pointer");
2442 chars
= vs
->inputBuffer
;
2443 nchars
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2446 start_vms_process_read (vs
); /* Crank up the next read on the process */
2447 return 1; /* Nothing worth printing, say we got 1 */
2451 if (proc_buffered_char
[channel
] < 0)
2453 nchars
= read_child_output (channel
, chars
, sizeof (chars
));
2455 nchars
= read (channel
, chars
, sizeof chars
);
2459 chars
[0] = proc_buffered_char
[channel
];
2460 proc_buffered_char
[channel
] = -1;
2462 nchars
= read_child_output (channel
, chars
+ 1, sizeof (chars
) - 1);
2464 nchars
= read (channel
, chars
+ 1, sizeof chars
- 1);
2469 nchars
= nchars
+ 1;
2471 #endif /* not VMS */
2473 if (nchars
<= 0) return nchars
;
2475 outstream
= p
->filter
;
2476 if (!NILP (outstream
))
2478 /* We inhibit quit here instead of just catching it so that
2479 hitting ^G when a filter happens to be running won't screw
2481 int count
= specpdl_ptr
- specpdl
;
2482 Lisp_Object odeactivate
;
2483 Lisp_Object obuffer
, okeymap
;
2485 /* No need to gcpro these, because all we do with them later
2486 is test them for EQness, and none of them should be a string. */
2487 odeactivate
= Vdeactivate_mark
;
2488 XSETBUFFER (obuffer
, current_buffer
);
2489 okeymap
= current_buffer
->keymap
;
2491 specbind (Qinhibit_quit
, Qt
);
2492 specbind (Qlast_nonmenu_event
, Qt
);
2494 running_asynch_code
= 1;
2495 internal_condition_case_1 (read_process_output_call
,
2498 Fcons (make_string (chars
,
2501 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
2502 read_process_output_error_handler
);
2503 running_asynch_code
= 0;
2504 restore_match_data ();
2506 /* Handling the process output should not deactivate the mark. */
2507 Vdeactivate_mark
= odeactivate
;
2509 #if 0 /* Call record_asynch_buffer_change unconditionally,
2510 because we might have changed minor modes or other things
2511 that affect key bindings. */
2512 if (! EQ (Fcurrent_buffer (), obuffer
)
2513 || ! EQ (current_buffer
->keymap
, okeymap
))
2515 /* But do it only if the caller is actually going to read events.
2516 Otherwise there's no need to make him wake up, and it could
2517 cause trouble (for example it would make Fsit_for return). */
2518 if (waiting_for_user_input_p
== -1)
2519 record_asynch_buffer_change ();
2522 start_vms_process_read (vs
);
2524 unbind_to (count
, Qnil
);
2528 /* If no filter, write into buffer if it isn't dead. */
2529 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2531 Lisp_Object old_read_only
;
2532 Lisp_Object old_begv
, old_zv
;
2533 Lisp_Object odeactivate
;
2535 odeactivate
= Vdeactivate_mark
;
2537 Fset_buffer (p
->buffer
);
2539 old_read_only
= current_buffer
->read_only
;
2540 XSETFASTINT (old_begv
, BEGV
);
2541 XSETFASTINT (old_zv
, ZV
);
2543 current_buffer
->read_only
= Qnil
;
2545 /* Insert new output into buffer
2546 at the current end-of-output marker,
2547 thus preserving logical ordering of input and output. */
2548 if (XMARKER (p
->mark
)->buffer
)
2549 SET_PT (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
));
2553 /* If the output marker is outside of the visible region, save
2554 the restriction and widen. */
2555 if (! (BEGV
<= point
&& point
<= ZV
))
2558 /* Make sure opoint floats ahead of any new text, just as point
2560 if (point
<= opoint
)
2563 /* Insert after old_begv, but before old_zv. */
2564 if (point
< XFASTINT (old_begv
))
2565 XSETFASTINT (old_begv
, XFASTINT (old_begv
) + nchars
);
2566 if (point
<= XFASTINT (old_zv
))
2567 XSETFASTINT (old_zv
, XFASTINT (old_zv
) + nchars
);
2569 /* Insert before markers in case we are inserting where
2570 the buffer's mark is, and the user's next command is Meta-y. */
2571 insert_before_markers (chars
, nchars
);
2572 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
2574 update_mode_lines
++;
2576 /* If the restriction isn't what it should be, set it. */
2577 if (XFASTINT (old_begv
) != BEGV
|| XFASTINT (old_zv
) != ZV
)
2578 Fnarrow_to_region (old_begv
, old_zv
);
2580 /* Handling the process output should not deactivate the mark. */
2581 Vdeactivate_mark
= odeactivate
;
2583 current_buffer
->read_only
= old_read_only
;
2585 set_buffer_internal (old
);
2588 start_vms_process_read (vs
);
2593 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
2595 "Returns non-nil if emacs is waiting for input from the user.\n\
2596 This is intended for use by asynchronous process output filters and sentinels.")
2599 return (waiting_for_user_input_p
? Qt
: Qnil
);
2602 /* Sending data to subprocess */
2604 jmp_buf send_process_frame
;
2607 send_process_trap ()
2613 longjmp (send_process_frame
, 1);
2616 /* Send some data to process PROC.
2617 BUF is the beginning of the data; LEN is the number of characters.
2618 OBJECT is the Lisp object that the data comes from. */
2620 send_process (proc
, buf
, len
, object
)
2621 volatile Lisp_Object proc
;
2626 /* Use volatile to protect variables from being clobbered by longjmp. */
2628 volatile unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
2631 struct Lisp_Process
*p
= XPROCESS (proc
);
2632 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2635 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2636 update_status (XPROCESS (proc
));
2637 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2638 error ("Process %s not running", procname
);
2641 vs
= get_vms_process_pointer (p
->pid
);
2643 error ("Could not find this process: %x", p
->pid
);
2644 else if (write_to_vms_process (vs
, buf
, len
))
2648 if (pty_max_bytes
== 0)
2650 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
2651 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
2653 if (pty_max_bytes
< 0)
2654 pty_max_bytes
= 250;
2656 pty_max_bytes
= 250;
2658 /* Deduct one, to leave space for the eof. */
2662 if (!setjmp (send_process_frame
))
2666 SIGTYPE (*old_sigpipe
)();
2669 /* Decide how much data we can send in one batch.
2670 Long lines need to be split into multiple batches. */
2671 if (!NILP (XPROCESS (proc
)->pty_flag
))
2673 /* Starting this at zero is always correct when not the first iteration
2674 because the previous iteration ended by sending C-d.
2675 It may not be correct for the first iteration
2676 if a partial line was sent in a separate send_process call.
2677 If that proves worth handling, we need to save linepos
2678 in the process object. */
2681 char *end
= buf
+ len
;
2683 /* Scan through this text for a line that is too long. */
2684 while (ptr
!= end
&& linepos
< pty_max_bytes
)
2692 /* If we found one, break the line there
2693 and put in a C-d to force the buffer through. */
2697 /* Send this batch, using one or more write calls. */
2700 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
2701 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
2702 signal (SIGPIPE
, old_sigpipe
);
2708 || errno
== EWOULDBLOCK
2714 /* Buffer is full. Wait, accepting input;
2715 that may allow the program
2716 to finish doing output and read more. */
2721 /* Running filters might relocate buffers or strings.
2722 Arrange to relocate BUF. */
2723 if (BUFFERP (object
))
2724 offset
= BUF_PTR_CHAR_POS (XBUFFER (object
),
2725 (unsigned char *) buf
);
2726 else if (STRINGP (object
))
2727 offset
= buf
- (char *) XSTRING (object
)->data
;
2729 XSETFASTINT (zero
, 0);
2730 wait_reading_process_input (1, 0, zero
, 0);
2732 if (BUFFERP (object
))
2733 buf
= (char *) BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
2734 else if (STRINGP (object
))
2735 buf
= offset
+ (char *) XSTRING (object
)->data
;
2740 /* This is a real error. */
2741 report_file_error ("writing to process", Fcons (proc
, Qnil
));
2748 /* If we sent just part of the string, put in an EOF
2749 to force it through, before we send the rest. */
2751 Fprocess_send_eof (proc
);
2756 XPROCESS (proc
)->raw_status_low
= Qnil
;
2757 XPROCESS (proc
)->raw_status_high
= Qnil
;
2758 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2759 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2760 deactivate_process (proc
);
2762 error ("Error writing to process %s; closed it", procname
);
2764 error ("SIGPIPE raised on process %s; closed it", procname
);
2769 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
2771 "Send current contents of region as input to PROCESS.\n\
2772 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2773 nil, indicating the current buffer's process.\n\
2774 Called from program, takes three arguments, PROCESS, START and END.\n\
2775 If the region is more than 500 characters long,\n\
2776 it is sent in several bunches. This may happen even for shorter regions.\n\
2777 Output from processes can arrive in between bunches.")
2778 (process
, start
, end
)
2779 Lisp_Object process
, start
, end
;
2784 proc
= get_process (process
);
2785 validate_region (&start
, &end
);
2787 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
2790 start1
= XINT (start
);
2791 send_process (proc
, &FETCH_CHAR (start1
), XINT (end
) - XINT (start
),
2792 Fcurrent_buffer ());
2797 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
2799 "Send PROCESS the contents of STRING as input.\n\
2800 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2801 nil, indicating the current buffer's process.\n\
2802 If STRING is more than 500 characters long,\n\
2803 it is sent in several bunches. This may happen even for shorter strings.\n\
2804 Output from processes can arrive in between bunches.")
2806 Lisp_Object process
, string
;
2809 CHECK_STRING (string
, 1);
2810 proc
= get_process (process
);
2811 send_process (proc
, XSTRING (string
)->data
, XSTRING (string
)->size
, string
);
2815 /* send a signal number SIGNO to PROCESS.
2816 CURRENT_GROUP means send to the process group that currently owns
2817 the terminal being used to communicate with PROCESS.
2818 This is used for various commands in shell mode.
2819 If NOMSG is zero, insert signal-announcements into process's buffers
2822 If we can, we try to signal PROCESS by sending control characters
2823 down the pty. This allows us to signal inferiors who have changed
2824 their uid, for which killpg would return an EPERM error. */
2827 process_send_signal (process
, signo
, current_group
, nomsg
)
2828 Lisp_Object process
;
2830 Lisp_Object current_group
;
2834 register struct Lisp_Process
*p
;
2838 proc
= get_process (process
);
2839 p
= XPROCESS (proc
);
2841 if (!EQ (p
->childp
, Qt
))
2842 error ("Process %s is not a subprocess",
2843 XSTRING (p
->name
)->data
);
2844 if (XINT (p
->infd
) < 0)
2845 error ("Process %s is not active",
2846 XSTRING (p
->name
)->data
);
2848 if (NILP (p
->pty_flag
))
2849 current_group
= Qnil
;
2851 /* If we are using pgrps, get a pgrp number and make it negative. */
2852 if (!NILP (current_group
))
2854 #ifdef SIGNALS_VIA_CHARACTERS
2855 /* If possible, send signals to the entire pgrp
2856 by sending an input character to it. */
2858 /* TERMIOS is the latest and bestest, and seems most likely to
2859 work. If the system has it, use it. */
2866 tcgetattr (XINT (p
->infd
), &t
);
2867 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2871 tcgetattr (XINT (p
->infd
), &t
);
2872 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2876 tcgetattr (XINT (p
->infd
), &t
);
2877 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
2878 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2880 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
2885 #else /* ! HAVE_TERMIOS */
2887 /* On Berkeley descendants, the following IOCTL's retrieve the
2888 current control characters. */
2889 #if defined (TIOCGLTC) && defined (TIOCGETC)
2897 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2898 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
2901 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2902 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
2906 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
2907 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
2909 #endif /* ! defined (SIGTSTP) */
2912 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2914 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
2921 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2922 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2925 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2926 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2930 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2931 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2933 #endif /* ! defined (SIGTSTP) */
2935 #else /* ! defined (TCGETA) */
2936 Your configuration files are messed up
.
2937 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
2938 you'd better be using one of the alternatives above! */
2939 #endif /* ! defined (TCGETA) */
2940 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2941 #endif /* ! defined HAVE_TERMIOS */
2942 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
2945 /* Get the pgrp using the tty itself, if we have that.
2946 Otherwise, use the pty to get the pgrp.
2947 On pfa systems, saka@pfu.fujitsu.co.JP writes:
2948 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
2949 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
2950 His patch indicates that if TIOCGPGRP returns an error, then
2951 we should just assume that p->pid is also the process group id. */
2955 if (!NILP (p
->subtty
))
2956 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
2958 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
2962 gid
= - XFASTINT (p
->pid
);
2963 #endif /* ! defined (pfa) */
2969 #else /* ! defined (TIOCGPGRP ) */
2970 /* Can't select pgrps on this system, so we know that
2971 the child itself heads the pgrp. */
2972 gid
= - XFASTINT (p
->pid
);
2973 #endif /* ! defined (TIOCGPGRP ) */
2976 gid
= - XFASTINT (p
->pid
);
2982 p
->raw_status_low
= Qnil
;
2983 p
->raw_status_high
= Qnil
;
2985 XSETINT (p
->tick
, ++process_tick
);
2989 #endif /* ! defined (SIGCONT) */
2992 send_process (proc
, "\003", 1, Qnil
); /* ^C */
2997 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
3002 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
3005 flush_pending_output (XINT (p
->infd
));
3009 /* If we don't have process groups, send the signal to the immediate
3010 subprocess. That isn't really right, but it's better than any
3011 obvious alternative. */
3014 kill (XFASTINT (p
->pid
), signo
);
3018 /* gid may be a pid, or minus a pgrp's number */
3020 if (!NILP (current_group
))
3021 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
3024 gid
= - XFASTINT (p
->pid
);
3027 #else /* ! defined (TIOCSIGSEND) */
3028 EMACS_KILLPG (-gid
, signo
);
3029 #endif /* ! defined (TIOCSIGSEND) */
3032 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
3033 "Interrupt process PROCESS. May be process or name of one.\n\
3034 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
3035 nil or no arg means current buffer's process.\n\
3036 Second arg CURRENT-GROUP non-nil means send signal to\n\
3037 the current process-group of the process's controlling terminal\n\
3038 rather than to the process's own process group.\n\
3039 If the process is a shell, this means interrupt current subjob\n\
3040 rather than the shell.")
3041 (process
, current_group
)
3042 Lisp_Object process
, current_group
;
3044 process_send_signal (process
, SIGINT
, current_group
, 0);
3048 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
3049 "Kill process PROCESS. May be process or name of one.\n\
3050 See function `interrupt-process' for more details on usage.")
3051 (process
, current_group
)
3052 Lisp_Object process
, current_group
;
3054 process_send_signal (process
, SIGKILL
, current_group
, 0);
3058 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
3059 "Send QUIT signal to process PROCESS. May be process or name of one.\n\
3060 See function `interrupt-process' for more details on usage.")
3061 (process
, current_group
)
3062 Lisp_Object process
, current_group
;
3064 process_send_signal (process
, SIGQUIT
, current_group
, 0);
3068 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
3069 "Stop process PROCESS. May be process or name of one.\n\
3070 See function `interrupt-process' for more details on usage.")
3071 (process
, current_group
)
3072 Lisp_Object process
, current_group
;
3075 error ("no SIGTSTP support");
3077 process_send_signal (process
, SIGTSTP
, current_group
, 0);
3082 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
3083 "Continue process PROCESS. May be process or name of one.\n\
3084 See function `interrupt-process' for more details on usage.")
3085 (process
, current_group
)
3086 Lisp_Object process
, current_group
;
3089 process_send_signal (process
, SIGCONT
, current_group
, 0);
3091 error ("no SIGCONT support");
3096 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
3097 2, 2, "nProcess number: \nnSignal code: ",
3098 "Send the process with process id PID the signal with code SIGCODE.\n\
3099 PID must be an integer. The process need not be a child of this Emacs.\n\
3100 SIGCODE may be an integer, or a symbol whose name is a signal name.")
3102 Lisp_Object pid
, sigcode
;
3104 CHECK_NUMBER (pid
, 0);
3106 #define handle_signal(NAME, VALUE) \
3107 else if (!strcmp (name, NAME)) \
3108 XSETINT (sigcode, VALUE)
3110 if (INTEGERP (sigcode
))
3114 unsigned char *name
;
3116 CHECK_SYMBOL (sigcode
, 1);
3117 name
= XSYMBOL (sigcode
)->name
->data
;
3122 handle_signal ("SIGHUP", SIGHUP
);
3125 handle_signal ("SIGINT", SIGINT
);
3128 handle_signal ("SIGQUIT", SIGQUIT
);
3131 handle_signal ("SIGILL", SIGILL
);
3134 handle_signal ("SIGABRT", SIGABRT
);
3137 handle_signal ("SIGEMT", SIGEMT
);
3140 handle_signal ("SIGKILL", SIGKILL
);
3143 handle_signal ("SIGFPE", SIGFPE
);
3146 handle_signal ("SIGBUS", SIGBUS
);
3149 handle_signal ("SIGSEGV", SIGSEGV
);
3152 handle_signal ("SIGSYS", SIGSYS
);
3155 handle_signal ("SIGPIPE", SIGPIPE
);
3158 handle_signal ("SIGALRM", SIGALRM
);
3161 handle_signal ("SIGTERM", SIGTERM
);
3164 handle_signal ("SIGURG", SIGURG
);
3167 handle_signal ("SIGSTOP", SIGSTOP
);
3170 handle_signal ("SIGTSTP", SIGTSTP
);
3173 handle_signal ("SIGCONT", SIGCONT
);
3176 handle_signal ("SIGCHLD", SIGCHLD
);
3179 handle_signal ("SIGTTIN", SIGTTIN
);
3182 handle_signal ("SIGTTOU", SIGTTOU
);
3185 handle_signal ("SIGIO", SIGIO
);
3188 handle_signal ("SIGXCPU", SIGXCPU
);
3191 handle_signal ("SIGXFSZ", SIGXFSZ
);
3194 handle_signal ("SIGVTALRM", SIGVTALRM
);
3197 handle_signal ("SIGPROF", SIGPROF
);
3200 handle_signal ("SIGWINCH", SIGWINCH
);
3203 handle_signal ("SIGINFO", SIGINFO
);
3206 handle_signal ("SIGUSR1", SIGUSR1
);
3209 handle_signal ("SIGUSR2", SIGUSR2
);
3212 error ("Undefined signal name %s", name
);
3215 #undef handle_signal
3218 /* Only works for kill-type signals */
3219 return make_number (win32_kill_process (XINT (pid
), XINT (sigcode
)));
3221 return make_number (kill (XINT (pid
), XINT (sigcode
)));
3225 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
3226 "Make PROCESS see end-of-file in its input.\n\
3227 Eof comes after any text already sent to it.\n\
3228 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3229 nil, indicating the current buffer's process.\n\
3230 If PROCESS is a network connection, or is a process communicating\n\
3231 through a pipe (as opposed to a pty), then you cannot send any more\n\
3232 text to PROCESS after you call this function.")
3234 Lisp_Object process
;
3238 proc
= get_process (process
);
3240 /* Make sure the process is really alive. */
3241 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3242 update_status (XPROCESS (proc
));
3243 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3244 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
3247 send_process (proc
, "\032", 1, Qnil
); /* ^z */
3249 if (!NILP (XPROCESS (proc
)->pty_flag
))
3250 send_process (proc
, "\004", 1, Qnil
);
3253 close (XINT (XPROCESS (proc
)->outfd
));
3254 XSETINT (XPROCESS (proc
)->outfd
, open (NULL_DEVICE
, O_WRONLY
));
3260 /* Kill all processes associated with `buffer'.
3261 If `buffer' is nil, kill all processes */
3263 kill_buffer_processes (buffer
)
3266 Lisp_Object tail
, proc
;
3268 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3270 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3271 if (GC_PROCESSP (proc
)
3272 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
3274 if (NETCONN_P (proc
))
3275 Fdelete_process (proc
);
3276 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
3277 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
3282 /* On receipt of a signal that a child status has changed,
3283 loop asking about children with changed statuses until
3284 the system says there are no more.
3285 All we do is change the status;
3286 we do not run sentinels or print notifications.
3287 That is saved for the next time keyboard input is done,
3288 in order to avoid timing errors. */
3290 /** WARNING: this can be called during garbage collection.
3291 Therefore, it must not be fooled by the presence of mark bits in
3294 /** USG WARNING: Although it is not obvious from the documentation
3295 in signal(2), on a USG system the SIGCLD handler MUST NOT call
3296 signal() before executing at least one wait(), otherwise the handler
3297 will be called again, resulting in an infinite loop. The relevant
3298 portion of the documentation reads "SIGCLD signals will be queued
3299 and the signal-catching function will be continually reentered until
3300 the queue is empty". Invoking signal() causes the kernel to reexamine
3301 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
3304 sigchld_handler (signo
)
3307 int old_errno
= errno
;
3309 register struct Lisp_Process
*p
;
3310 extern EMACS_TIME
*input_available_clear_time
;
3314 sigheld
|= sigbit (SIGCHLD
);
3326 #endif /* no WUNTRACED */
3327 /* Keep trying to get a status until we get a definitive result. */
3331 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
3333 while (pid
<= 0 && errno
== EINTR
);
3337 /* A real failure. We have done all our job, so return. */
3339 /* USG systems forget handlers when they are used;
3340 must reestablish each time */
3342 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
3345 sigheld
&= ~sigbit (SIGCHLD
);
3353 #endif /* no WNOHANG */
3355 /* Find the process that signaled us, and record its status. */
3358 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3360 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3361 p
= XPROCESS (proc
);
3362 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
3367 /* Look for an asynchronous process whose pid hasn't been filled
3370 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3372 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3373 p
= XPROCESS (proc
);
3374 if (INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
3379 /* Change the status of the process that was found. */
3382 union { int i
; WAITTYPE wt
; } u
;
3383 int clear_desc_flag
= 0;
3385 XSETINT (p
->tick
, ++process_tick
);
3387 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
3388 XSETINT (p
->raw_status_high
, u
.i
>> 16);
3390 /* If process has terminated, stop waiting for its output. */
3391 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
3392 && XINT (p
->infd
) >= 0)
3393 clear_desc_flag
= 1;
3395 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
3396 if (clear_desc_flag
)
3398 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
3399 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
3402 /* Tell wait_reading_process_input that it needs to wake up and
3404 if (input_available_clear_time
)
3405 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3408 /* There was no asynchronous process found for that id. Check
3409 if we have a synchronous process. */
3412 synch_process_alive
= 0;
3414 /* Report the status of the synchronous process. */
3416 synch_process_retcode
= WRETCODE (w
);
3417 else if (WIFSIGNALED (w
))
3419 int code
= WTERMSIG (w
);
3425 /* Suppress warning if the table has const char *. */
3426 signame
= (char *) sys_siglist
[code
];
3428 signame
= sys_errlist
[code
];
3432 signame
= "unknown";
3434 synch_process_death
= signame
;
3437 /* Tell wait_reading_process_input that it needs to wake up and
3439 if (input_available_clear_time
)
3440 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3443 /* On some systems, we must return right away.
3444 If any more processes want to signal us, we will
3446 Otherwise (on systems that have WNOHANG), loop around
3447 to use up all the processes that have something to tell us. */
3448 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT)
3450 signal (signo
, sigchld_handler
);
3454 #endif /* USG, but not HPUX with WNOHANG */
3460 exec_sentinel_unwind (data
)
3463 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
3468 exec_sentinel_error_handler (error
)
3471 cmd_error_internal (error
, "error in process sentinel: ");
3473 update_echo_area ();
3474 Fsleep_for (make_number (2), Qnil
);
3478 exec_sentinel (proc
, reason
)
3479 Lisp_Object proc
, reason
;
3481 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
3482 register struct Lisp_Process
*p
= XPROCESS (proc
);
3483 int count
= specpdl_ptr
- specpdl
;
3485 /* No need to gcpro these, because all we do with them later
3486 is test them for EQness, and none of them should be a string. */
3487 odeactivate
= Vdeactivate_mark
;
3488 XSETBUFFER (obuffer
, current_buffer
);
3489 okeymap
= current_buffer
->keymap
;
3491 sentinel
= p
->sentinel
;
3492 if (NILP (sentinel
))
3495 /* Zilch the sentinel while it's running, to avoid recursive invocations;
3496 assure that it gets restored no matter how the sentinel exits. */
3498 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
3499 /* Inhibit quit so that random quits don't screw up a running filter. */
3500 specbind (Qinhibit_quit
, Qt
);
3501 specbind (Qlast_nonmenu_event
, Qt
);
3503 running_asynch_code
= 1;
3504 internal_condition_case_1 (read_process_output_call
,
3506 Fcons (proc
, Fcons (reason
, Qnil
))),
3507 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
3508 exec_sentinel_error_handler
);
3509 running_asynch_code
= 0;
3510 restore_match_data ();
3512 Vdeactivate_mark
= odeactivate
;
3514 if (! EQ (Fcurrent_buffer (), obuffer
)
3515 || ! EQ (current_buffer
->keymap
, okeymap
))
3517 /* But do it only if the caller is actually going to read events.
3518 Otherwise there's no need to make him wake up, and it could
3519 cause trouble (for example it would make Fsit_for return). */
3520 if (waiting_for_user_input_p
== -1)
3521 record_asynch_buffer_change ();
3523 unbind_to (count
, Qnil
);
3526 /* Report all recent events of a change in process status
3527 (either run the sentinel or output a message).
3528 This is done while Emacs is waiting for keyboard input. */
3532 register Lisp_Object proc
, buffer
;
3533 Lisp_Object tail
, msg
;
3534 struct gcpro gcpro1
, gcpro2
;
3538 /* We need to gcpro tail; if read_process_output calls a filter
3539 which deletes a process and removes the cons to which tail points
3540 from Vprocess_alist, and then causes a GC, tail is an unprotected
3544 /* Set this now, so that if new processes are created by sentinels
3545 that we run, we get called again to handle their status changes. */
3546 update_tick
= process_tick
;
3548 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
3551 register struct Lisp_Process
*p
;
3553 proc
= Fcdr (Fcar (tail
));
3554 p
= XPROCESS (proc
);
3556 if (XINT (p
->tick
) != XINT (p
->update_tick
))
3558 XSETINT (p
->update_tick
, XINT (p
->tick
));
3560 /* If process is still active, read any output that remains. */
3561 if (XINT (p
->infd
) >= 0)
3562 while (! EQ (p
->filter
, Qt
)
3563 && read_process_output (proc
, XINT (p
->infd
)) > 0);
3567 /* Get the text to use for the message. */
3568 if (!NILP (p
->raw_status_low
))
3570 msg
= status_message (p
->status
);
3572 /* If process is terminated, deactivate it or delete it. */
3574 if (CONSP (p
->status
))
3575 symbol
= XCONS (p
->status
)->car
;
3577 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
3578 || EQ (symbol
, Qclosed
))
3580 if (delete_exited_processes
)
3581 remove_process (proc
);
3583 deactivate_process (proc
);
3586 /* Now output the message suitably. */
3587 if (!NILP (p
->sentinel
))
3588 exec_sentinel (proc
, msg
);
3589 /* Don't bother with a message in the buffer
3590 when a process becomes runnable. */
3591 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
3593 Lisp_Object ro
, tem
;
3594 struct buffer
*old
= current_buffer
;
3597 ro
= XBUFFER (buffer
)->read_only
;
3599 /* Avoid error if buffer is deleted
3600 (probably that's why the process is dead, too) */
3601 if (NILP (XBUFFER (buffer
)->name
))
3603 Fset_buffer (buffer
);
3605 /* Insert new output into buffer
3606 at the current end-of-output marker,
3607 thus preserving logical ordering of input and output. */
3608 if (XMARKER (p
->mark
)->buffer
)
3609 SET_PT (marker_position (p
->mark
));
3612 if (point
<= opoint
)
3613 opoint
+= XSTRING (msg
)->size
+ XSTRING (p
->name
)->size
+ 10;
3615 tem
= current_buffer
->read_only
;
3616 current_buffer
->read_only
= Qnil
;
3617 insert_string ("\nProcess ");
3618 Finsert (1, &p
->name
);
3619 insert_string (" ");
3621 current_buffer
->read_only
= tem
;
3622 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
3625 set_buffer_internal (old
);
3630 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
3631 redisplay_preserve_echo_area ();
3636 /* The first time this is called, assume keyboard input comes from DESC
3637 instead of from where we used to expect it.
3638 Subsequent calls mean assume input keyboard can come from DESC
3639 in addition to other places. */
3641 static int add_keyboard_wait_descriptor_called_flag
;
3644 add_keyboard_wait_descriptor (desc
)
3647 if (! add_keyboard_wait_descriptor_called_flag
)
3648 FD_CLR (0, &input_wait_mask
);
3649 add_keyboard_wait_descriptor_called_flag
= 1;
3650 FD_SET (desc
, &input_wait_mask
);
3651 if (desc
> max_keyboard_desc
)
3652 max_keyboard_desc
= desc
;
3655 /* From now on, do not expect DESC to give keyboard input. */
3658 delete_keyboard_wait_descriptor (desc
)
3662 int lim
= max_keyboard_desc
;
3664 FD_CLR (desc
, &input_wait_mask
);
3666 if (desc
== max_keyboard_desc
)
3667 for (fd
= 0; fd
< lim
; fd
++)
3668 if (FD_ISSET (fd
, &input_wait_mask
)
3669 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3670 max_keyboard_desc
= fd
;
3673 /* Return nonzero if *MASK has a bit set
3674 that corresponds to one of the keyboard input descriptors. */
3677 keyboard_bit_set (mask
)
3682 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
3683 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
3684 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3696 if (! noninteractive
|| initialized
)
3698 signal (SIGCHLD
, sigchld_handler
);
3701 FD_ZERO (&input_wait_mask
);
3702 FD_ZERO (&non_keyboard_wait_mask
);
3703 max_process_desc
= 0;
3705 FD_SET (0, &input_wait_mask
);
3707 Vprocess_alist
= Qnil
;
3708 for (i
= 0; i
< MAXDESC
; i
++)
3710 chan_process
[i
] = Qnil
;
3711 proc_buffered_char
[i
] = -1;
3718 stream_process
= intern ("stream");
3720 Qprocessp
= intern ("processp");
3721 staticpro (&Qprocessp
);
3722 Qrun
= intern ("run");
3724 Qstop
= intern ("stop");
3726 Qsignal
= intern ("signal");
3727 staticpro (&Qsignal
);
3729 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
3732 Qexit = intern ("exit");
3733 staticpro (&Qexit); */
3735 Qopen
= intern ("open");
3737 Qclosed
= intern ("closed");
3738 staticpro (&Qclosed
);
3740 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
3741 staticpro (&Qlast_nonmenu_event
);
3743 staticpro (&Vprocess_alist
);
3745 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
3746 "*Non-nil means delete processes immediately when they exit.\n\
3747 nil means don't delete them until `list-processes' is run.");
3749 delete_exited_processes
= 1;
3751 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
3752 "Control type of device used to communicate with subprocesses.\n\
3753 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
3754 The value has no effect if the system has no ptys or if all ptys are busy:\n\
3755 then a pipe is used in any case.\n\
3756 The value takes effect when `start-process' is called.");
3757 Vprocess_connection_type
= Qt
;
3759 defsubr (&Sprocessp
);
3760 defsubr (&Sget_process
);
3761 defsubr (&Sget_buffer_process
);
3762 defsubr (&Sdelete_process
);
3763 defsubr (&Sprocess_status
);
3764 defsubr (&Sprocess_exit_status
);
3765 defsubr (&Sprocess_id
);
3766 defsubr (&Sprocess_name
);
3767 defsubr (&Sprocess_tty_name
);
3768 defsubr (&Sprocess_command
);
3769 defsubr (&Sset_process_buffer
);
3770 defsubr (&Sprocess_buffer
);
3771 defsubr (&Sprocess_mark
);
3772 defsubr (&Sset_process_filter
);
3773 defsubr (&Sprocess_filter
);
3774 defsubr (&Sset_process_sentinel
);
3775 defsubr (&Sset_process_window_size
);
3776 defsubr (&Sprocess_sentinel
);
3777 defsubr (&Sprocess_kill_without_query
);
3778 defsubr (&Slist_processes
);
3779 defsubr (&Sprocess_list
);
3780 defsubr (&Sstart_process
);
3782 defsubr (&Sopen_network_stream
);
3783 #endif /* HAVE_SOCKETS */
3784 defsubr (&Saccept_process_output
);
3785 defsubr (&Sprocess_send_region
);
3786 defsubr (&Sprocess_send_string
);
3787 defsubr (&Sinterrupt_process
);
3788 defsubr (&Skill_process
);
3789 defsubr (&Squit_process
);
3790 defsubr (&Sstop_process
);
3791 defsubr (&Scontinue_process
);
3792 defsubr (&Sprocess_send_eof
);
3793 defsubr (&Ssignal_process
);
3794 defsubr (&Swaiting_for_user_input_p
);
3795 /* defsubr (&Sprocess_connection); */
3799 #else /* not subprocesses */
3801 #include <sys/types.h>
3805 #include "systime.h"
3806 #include "termopts.h"
3807 #include "sysselect.h"
3809 extern int frame_garbaged
;
3811 extern EMACS_TIME
timer_check ();
3812 extern int timers_run
;
3814 /* As described above, except assuming that there are no subprocesses:
3816 Wait for timeout to elapse and/or keyboard input to be available.
3819 timeout in seconds, or
3820 zero for no limit, or
3821 -1 means gobble data immediately available but don't wait for any.
3823 read_kbd is a Lisp_Object:
3824 0 to ignore keyboard input, or
3825 1 to return when input is available, or
3826 -1 means caller will actually read the input, so don't throw to
3828 a cons cell, meaning wait until its car is non-nil
3829 (and gobble terminal input into the buffer if any arrives), or
3830 We know that read_kbd will never be a Lisp_Process, since
3831 `subprocesses' isn't defined.
3833 do_display != 0 means redisplay should be done to show subprocess
3834 output that arrives.
3836 Return true iff we received input from any process. */
3839 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
3840 int time_limit
, microsecs
;
3841 Lisp_Object read_kbd
;
3844 EMACS_TIME end_time
, timeout
;
3845 SELECT_TYPE waitchannels
;
3847 Lisp_Object
*wait_for_cell
= 0;
3849 /* If waiting for non-nil in a cell, record where. */
3850 if (CONSP (read_kbd
))
3852 wait_for_cell
= &XCONS (read_kbd
)->car
;
3853 XSETFASTINT (read_kbd
, 0);
3856 /* What does time_limit really mean? */
3857 if (time_limit
|| microsecs
)
3859 if (time_limit
== -1)
3860 /* In fact, it's zero. */
3861 EMACS_SET_SECS_USECS (timeout
, 0, 0);
3863 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
3865 /* How far in the future is that? */
3866 EMACS_GET_TIME (end_time
);
3867 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
3870 /* It's infinite. */
3871 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
3873 /* Turn off periodic alarms (in case they are in use)
3874 because the select emulator uses alarms. */
3880 int timeout_reduced_for_timers
= 0;
3882 /* If calling from keyboard input, do not quit
3883 since we want to return C-g as an input character.
3884 Otherwise, do pending quit if requested. */
3885 if (XINT (read_kbd
) >= 0)
3888 /* Exit now if the cell we're waiting for became non-nil. */
3889 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
3892 /* Compute time from now till when time limit is up */
3893 /* Exit if already run out */
3894 if (time_limit
> 0 || microsecs
)
3896 EMACS_GET_TIME (timeout
);
3897 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
3898 if (EMACS_TIME_NEG_P (timeout
))
3902 /* If our caller will not immediately handle keyboard events,
3903 run timer events directly.
3904 (Callers that will immediately read keyboard events
3905 call timer_delay on their own.) */
3908 EMACS_TIME timer_delay
;
3912 old_timers_run
= timers_run
;
3913 timer_delay
= timer_check (1);
3914 if (timers_run
!= old_timers_run
&& do_display
)
3916 redisplay_preserve_echo_area ();
3917 /* We must retry, since a timer may have requeued itself
3918 and that could alter the time delay. */
3922 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
3924 EMACS_TIME difference
;
3925 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
3926 if (EMACS_TIME_NEG_P (difference
))
3928 timeout
= timer_delay
;
3929 timeout_reduced_for_timers
= 1;
3934 /* Cause C-g and alarm signals to take immediate action,
3935 and cause input available signals to zero out timeout. */
3936 if (XINT (read_kbd
) < 0)
3937 set_waiting_for_input (&timeout
);
3939 /* Wait till there is something to do. */
3941 if (! XINT (read_kbd
) && wait_for_cell
== 0)
3942 FD_ZERO (&waitchannels
);
3944 FD_SET (0, &waitchannels
);
3946 /* If a frame has been newly mapped and needs updating,
3947 reprocess its display stuff. */
3948 if (frame_garbaged
&& do_display
)
3950 clear_waiting_for_input ();
3951 redisplay_preserve_echo_area ();
3952 if (XINT (read_kbd
) < 0)
3953 set_waiting_for_input (&timeout
);
3956 if (XINT (read_kbd
) && detect_input_pending ())
3959 FD_ZERO (&waitchannels
);
3962 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
3967 /* Make C-g and alarm signals set flags again */
3968 clear_waiting_for_input ();
3970 /* If we woke up due to SIGWINCH, actually change size now. */
3971 do_pending_window_change ();
3973 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
3974 /* We waited the full specified time, so return now. */
3979 /* If the system call was interrupted, then go around the
3981 if (xerrno
== EINTR
)
3982 FD_ZERO (&waitchannels
);
3984 error ("select error: %s", strerror (xerrno
));
3987 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
3988 /* System sometimes fails to deliver SIGIO. */
3989 kill (getpid (), SIGIO
);
3992 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
3993 kill (getpid (), SIGIO
);
3996 /* Check for keyboard input */
3998 if ((XINT (read_kbd
) != 0 || wait_for_cell
)
3999 && detect_input_pending_run_timers (do_display
))
4001 swallow_events (do_display
);
4002 if (detect_input_pending_run_timers (do_display
))
4006 /* Exit now if the cell we're waiting for became non-nil. */
4007 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
4017 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
4018 /* Don't confuse make-docfile by having two doc strings for this function.
4019 make-docfile does not pay attention to #if, for good reason! */
4022 register Lisp_Object name
;
4027 /* Kill all processes associated with `buffer'.
4028 If `buffer' is nil, kill all processes.
4029 Since we have no subprocesses, this does nothing. */
4031 kill_buffer_processes (buffer
)
4042 defsubr (&Sget_buffer_process
);
4046 #endif /* not subprocesses */