1 /* Asynchronous subprocess control for GNU Emacs.
2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 1996
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
27 /* This file is split into two parts by the following preprocessor
28 conditional. The 'then' clause contains all of the support for
29 asynchronous subprocesses. The 'else' clause contains stub
30 versions of some of the asynchronous subprocess routines that are
31 often called elsewhere in Emacs, so we don't have to #ifdef the
32 sections that call them. */
40 #include <sys/types.h> /* some typedefs are used in sys/file.h */
50 #endif /* not WINDOWSNT */
52 #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */
53 #include <sys/socket.h>
55 #include <netinet/in.h>
56 #include <arpa/inet.h>
57 #ifdef NEED_NET_ERRNO_H
58 #include <net/errno.h>
59 #endif /* NEED_NET_ERRNO_H */
60 #endif /* HAVE_SOCKETS */
62 /* TERM is a poor-man's SLIP, used on Linux. */
67 /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */
68 #ifdef HAVE_BROKEN_INET_ADDR
69 #define IN_ADDR struct in_addr
70 #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1)
72 #define IN_ADDR unsigned long
73 #define NUMERIC_ADDR_ERROR (numeric_addr == -1)
76 #if defined(BSD) || defined(STRIDE)
77 #include <sys/ioctl.h>
78 #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5)
80 #endif /* HAVE_PTYS and no O_NDELAY */
81 #endif /* BSD or STRIDE */
83 #ifdef BROKEN_O_NONBLOCK
85 #endif /* BROKEN_O_NONBLOCK */
92 #include <sys/sysmacros.h> /* for "minor" */
102 #include "termhooks.h"
103 #include "termopts.h"
104 #include "commands.h"
107 Lisp_Object Qprocessp
;
108 Lisp_Object Qrun
, Qstop
, Qsignal
, Qopen
, Qclosed
;
109 Lisp_Object Qlast_nonmenu_event
;
110 /* Qexit is declared and initialized in eval.c. */
112 /* a process object is a network connection when its childp field is neither
113 Qt nor Qnil but is instead a string (name of foreign host we
114 are connected to + name of port we are connected to) */
117 static Lisp_Object stream_process
;
119 #define NETCONN_P(p) (GC_STRINGP (XPROCESS (p)->childp))
121 #define NETCONN_P(p) 0
122 #endif /* HAVE_SOCKETS */
124 /* Define first descriptor number available for subprocesses. */
126 #define FIRST_PROC_DESC 1
128 #define FIRST_PROC_DESC 3
131 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
134 #if !defined (SIGCHLD) && defined (SIGCLD)
135 #define SIGCHLD SIGCLD
138 #include "syssignal.h"
143 extern char *strerror ();
145 extern char *sys_errlist
[];
152 #ifndef SYS_SIGLIST_DECLARED
157 extern char *sys_siglist
[];
158 #endif /* not LINUX */
160 char *sys_siglist
[] =
166 "illegal instruction",
170 "floating point exception",
173 "segmentation violation",
174 "bad argument to system call",
175 "write on a pipe with no one to read it",
177 "software termination signal from kill",
179 "sendable stop signal not from tty",
180 "stop signal from tty",
181 "continue a stopped process",
182 "child status has changed",
183 "background read attempted from control tty",
184 "background write attempted from control tty",
185 "input record available at control tty",
186 "exceeded CPU time limit",
187 "exceeded file size limit"
189 #endif /* not WINDOWSNT */
192 #endif /* ! SYS_SIGLIST_DECLARED */
194 /* t means use pty, nil means use a pipe,
195 maybe other values to come. */
196 static Lisp_Object Vprocess_connection_type
;
200 #include <sys/socket.h>
204 /* These next two vars are non-static since sysdep.c uses them in the
205 emulation of `select'. */
206 /* Number of events of change of status of a process. */
208 /* Number of events for which the user or sentinel has been notified. */
211 #include "sysselect.h"
213 /* If we support a window system, turn on the code to poll periodically
214 to detect C-g. It isn't actually used when doing interrupt input. */
215 #ifdef HAVE_WINDOW_SYSTEM
216 #define POLL_FOR_INPUT
219 /* Mask of bits indicating the descriptors that we wait for input on. */
221 static SELECT_TYPE input_wait_mask
;
223 /* Mask that excludes keyboard input descriptor (s). */
225 static SELECT_TYPE non_keyboard_wait_mask
;
227 /* The largest descriptor currently in use for a process object. */
228 static int max_process_desc
;
230 /* The largest descriptor currently in use for keyboard input. */
231 static int max_keyboard_desc
;
233 /* Nonzero means delete a process right away if it exits. */
234 static int delete_exited_processes
;
236 /* Indexed by descriptor, gives the process (if any) for that descriptor */
237 Lisp_Object chan_process
[MAXDESC
];
239 /* Alist of elements (NAME . PROCESS) */
240 Lisp_Object Vprocess_alist
;
242 /* Buffered-ahead input char from process, indexed by channel.
243 -1 means empty (no char is buffered).
244 Used on sys V where the only way to tell if there is any
245 output from the process is to read at least one char.
246 Always -1 on systems that support FIONREAD. */
248 /* Don't make static; need to access externally. */
249 int proc_buffered_char
[MAXDESC
];
251 static Lisp_Object
get_process ();
253 extern EMACS_TIME
timer_check ();
254 extern int timers_run
;
256 /* Maximum number of bytes to send to a pty without an eof. */
257 static int pty_max_bytes
;
260 /* The file name of the pty opened by allocate_pty. */
262 static char pty_name
[24];
265 /* Compute the Lisp form of the process status, p->status, from
266 the numeric status that was returned by `wait'. */
268 Lisp_Object
status_convert ();
271 struct Lisp_Process
*p
;
273 union { int i
; WAITTYPE wt
; } u
;
274 u
.i
= XFASTINT (p
->raw_status_low
) + (XFASTINT (p
->raw_status_high
) << 16);
275 p
->status
= status_convert (u
.wt
);
276 p
->raw_status_low
= Qnil
;
277 p
->raw_status_high
= Qnil
;
280 /* Convert a process status word in Unix format to
281 the list that we use internally. */
288 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
289 else if (WIFEXITED (w
))
290 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
291 WCOREDUMP (w
) ? Qt
: Qnil
));
292 else if (WIFSIGNALED (w
))
293 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
294 WCOREDUMP (w
) ? Qt
: Qnil
));
299 /* Given a status-list, extract the three pieces of information
300 and store them individually through the three pointers. */
303 decode_status (l
, symbol
, code
, coredump
)
319 *symbol
= XCONS (l
)->car
;
320 tem
= XCONS (l
)->cdr
;
321 *code
= XFASTINT (XCONS (tem
)->car
);
322 tem
= XCONS (tem
)->cdr
;
323 *coredump
= !NILP (tem
);
327 /* Return a string describing a process status list. */
330 status_message (status
)
335 Lisp_Object string
, string2
;
337 decode_status (status
, &symbol
, &code
, &coredump
);
339 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
345 /* Cast to suppress warning if the table has const char *. */
346 signame
= (char *) sys_siglist
[code
];
348 signame
= sys_errlist
[code
];
353 string
= build_string (signame
);
354 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
355 XSTRING (string
)->data
[0] = DOWNCASE (XSTRING (string
)->data
[0]);
356 return concat2 (string
, string2
);
358 else if (EQ (symbol
, Qexit
))
361 return build_string ("finished\n");
362 string
= Fnumber_to_string (make_number (code
));
363 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
364 return concat2 (build_string ("exited abnormally with code "),
365 concat2 (string
, string2
));
368 return Fcopy_sequence (Fsymbol_name (symbol
));
373 /* Open an available pty, returning a file descriptor.
374 Return -1 on failure.
375 The file name of the terminal corresponding to the pty
376 is left in the variable pty_name. */
385 /* Some systems name their pseudoterminals so that there are gaps in
386 the usual sequence - for example, on HP9000/S700 systems, there
387 are no pseudoterminals with names ending in 'f'. So we wait for
388 three failures in a row before deciding that we've reached the
390 int failed_count
= 0;
395 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
396 for (i
= 0; i
< 16; i
++)
399 #ifdef PTY_NAME_SPRINTF
402 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
403 #endif /* no PTY_NAME_SPRINTF */
407 #else /* no PTY_OPEN */
409 /* Unusual IRIS code */
410 *ptyv
= open ("/dev/ptc", O_RDWR
| O_NDELAY
, 0);
413 if (fstat (fd
, &stb
) < 0)
416 if (stat (pty_name
, &stb
) < 0)
419 if (failed_count
>= 3)
425 fd
= open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
427 fd
= open (pty_name
, O_RDWR
| O_NDELAY
, 0);
429 #endif /* not IRIS */
430 #endif /* no PTY_OPEN */
434 /* check to make certain that both sides are available
435 this avoids a nasty yet stupid bug in rlogins */
436 #ifdef PTY_TTY_NAME_SPRINTF
439 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
440 #endif /* no PTY_TTY_NAME_SPRINTF */
442 if (access (pty_name
, 6) != 0)
445 #if !defined(IRIS) && !defined(__sgi)
451 #endif /* not UNIPLUS */
458 #endif /* HAVE_PTYS */
464 struct Lisp_Vector
*vec
;
465 register Lisp_Object val
, tem
, name1
;
466 register struct Lisp_Process
*p
;
470 vec
= allocate_vectorlike ((EMACS_INT
) VECSIZE (struct Lisp_Process
));
471 for (i
= 0; i
< VECSIZE (struct Lisp_Process
); i
++)
472 vec
->contents
[i
] = Qnil
;
473 vec
->size
= VECSIZE (struct Lisp_Process
);
474 p
= (struct Lisp_Process
*)vec
;
476 XSETINT (p
->infd
, -1);
477 XSETINT (p
->outfd
, -1);
478 XSETFASTINT (p
->pid
, 0);
479 XSETFASTINT (p
->tick
, 0);
480 XSETFASTINT (p
->update_tick
, 0);
481 p
->raw_status_low
= Qnil
;
482 p
->raw_status_high
= Qnil
;
484 p
->mark
= Fmake_marker ();
486 /* If name is already in use, modify it until it is unused. */
491 tem
= Fget_process (name1
);
492 if (NILP (tem
)) break;
493 sprintf (suffix
, "<%d>", i
);
494 name1
= concat2 (name
, build_string (suffix
));
498 XSETPROCESS (val
, p
);
499 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
503 remove_process (proc
)
504 register Lisp_Object proc
;
506 register Lisp_Object pair
;
508 pair
= Frassq (proc
, Vprocess_alist
);
509 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
511 deactivate_process (proc
);
514 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
515 "Return t if OBJECT is a process.")
519 return PROCESSP (object
) ? Qt
: Qnil
;
522 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
523 "Return the process named NAME, or nil if there is none.")
525 register Lisp_Object name
;
529 CHECK_STRING (name
, 0);
530 return Fcdr (Fassoc (name
, Vprocess_alist
));
533 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
534 "Return the (or, a) process associated with BUFFER.\n\
535 BUFFER may be a buffer or the name of one.")
537 register Lisp_Object buffer
;
539 register Lisp_Object buf
, tail
, proc
;
541 if (NILP (buffer
)) return Qnil
;
542 buf
= Fget_buffer (buffer
);
543 if (NILP (buf
)) return Qnil
;
545 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
547 proc
= Fcdr (Fcar (tail
));
548 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
554 /* This is how commands for the user decode process arguments. It
555 accepts a process, a process name, a buffer, a buffer name, or nil.
556 Buffers denote the first process in the buffer, and nil denotes the
561 register Lisp_Object name
;
563 register Lisp_Object proc
, obj
;
566 obj
= Fget_process (name
);
568 obj
= Fget_buffer (name
);
570 error ("Process %s does not exist", XSTRING (name
)->data
);
572 else if (NILP (name
))
573 obj
= Fcurrent_buffer ();
577 /* Now obj should be either a buffer object or a process object.
581 proc
= Fget_buffer_process (obj
);
583 error ("Buffer %s has no process", XSTRING (XBUFFER (obj
)->name
)->data
);
587 CHECK_PROCESS (obj
, 0);
593 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
594 "Delete PROCESS: kill it and forget about it immediately.\n\
595 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
596 nil, indicating the current buffer's process.")
598 register Lisp_Object process
;
600 process
= get_process (process
);
601 XPROCESS (process
)->raw_status_low
= Qnil
;
602 XPROCESS (process
)->raw_status_high
= Qnil
;
603 if (NETCONN_P (process
))
605 XPROCESS (process
)->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
606 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
608 else if (XINT (XPROCESS (process
)->infd
) >= 0)
610 Fkill_process (process
, Qnil
);
611 /* Do this now, since remove_process will make sigchld_handler do nothing. */
612 XPROCESS (process
)->status
613 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
614 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
617 remove_process (process
);
621 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
622 "Return the status of PROCESS: a symbol, one of these:\n\
623 run -- for a process that is running.\n\
624 stop -- for a process stopped but continuable.\n\
625 exit -- for a process that has exited.\n\
626 signal -- for a process that has got a fatal signal.\n\
627 open -- for a network stream connection that is open.\n\
628 closed -- for a network stream connection that is closed.\n\
629 nil -- if arg is a process name and no such process exists.\n\
630 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
631 nil, indicating the current buffer's process.")
633 register Lisp_Object process
;
635 register struct Lisp_Process
*p
;
636 register Lisp_Object status
;
638 if (STRINGP (process
))
639 process
= Fget_process (process
);
641 process
= get_process (process
);
646 p
= XPROCESS (process
);
647 if (!NILP (p
->raw_status_low
))
651 status
= XCONS (status
)->car
;
652 if (NETCONN_P (process
))
654 if (EQ (status
, Qrun
))
656 else if (EQ (status
, Qexit
))
662 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
664 "Return the exit status of PROCESS or the signal number that killed it.\n\
665 If PROCESS has not yet exited or died, return 0.")
667 register Lisp_Object process
;
669 CHECK_PROCESS (process
, 0);
670 if (!NILP (XPROCESS (process
)->raw_status_low
))
671 update_status (XPROCESS (process
));
672 if (CONSP (XPROCESS (process
)->status
))
673 return XCONS (XCONS (XPROCESS (process
)->status
)->cdr
)->car
;
674 return make_number (0);
677 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
678 "Return the process id of PROCESS.\n\
679 This is the pid of the Unix process which PROCESS uses or talks to.\n\
680 For a network connection, this value is nil.")
682 register Lisp_Object process
;
684 CHECK_PROCESS (process
, 0);
685 return XPROCESS (process
)->pid
;
688 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
689 "Return the name of PROCESS, as a string.\n\
690 This is the name of the program invoked in PROCESS,\n\
691 possibly modified to make it unique among process names.")
693 register Lisp_Object process
;
695 CHECK_PROCESS (process
, 0);
696 return XPROCESS (process
)->name
;
699 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
700 "Return the command that was executed to start PROCESS.\n\
701 This is a list of strings, the first string being the program executed\n\
702 and the rest of the strings being the arguments given to it.\n\
703 For a non-child channel, this is nil.")
705 register Lisp_Object process
;
707 CHECK_PROCESS (process
, 0);
708 return XPROCESS (process
)->command
;
711 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
712 "Return the name of the terminal PROCESS uses, or nil if none.\n\
713 This is the terminal that the process itself reads and writes on,\n\
714 not the name of the pty that Emacs uses to talk with that terminal.")
716 register Lisp_Object process
;
718 CHECK_PROCESS (process
, 0);
719 return XPROCESS (process
)->tty_name
;
722 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
724 "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).")
726 register Lisp_Object process
, buffer
;
728 CHECK_PROCESS (process
, 0);
730 CHECK_BUFFER (buffer
, 1);
731 XPROCESS (process
)->buffer
= buffer
;
735 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
737 "Return the buffer PROCESS is associated with.\n\
738 Output from PROCESS is inserted in this buffer\n\
739 unless PROCESS has a filter.")
741 register Lisp_Object process
;
743 CHECK_PROCESS (process
, 0);
744 return XPROCESS (process
)->buffer
;
747 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
749 "Return the marker for the end of the last output from PROCESS.")
751 register Lisp_Object process
;
753 CHECK_PROCESS (process
, 0);
754 return XPROCESS (process
)->mark
;
757 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
759 "Give PROCESS the filter function FILTER; nil means no filter.\n\
760 t means stop accepting output from the process.\n\
761 When a process has a filter, each time it does output\n\
762 the entire string of output is passed to the filter.\n\
763 The filter gets two arguments: the process and the string of output.\n\
764 If the process has a filter, its buffer is not used for output.")
766 register Lisp_Object process
, filter
;
768 CHECK_PROCESS (process
, 0);
771 FD_CLR (XINT (XPROCESS (process
)->infd
), &input_wait_mask
);
772 FD_CLR (XINT (XPROCESS (process
)->infd
), &non_keyboard_wait_mask
);
774 else if (EQ (XPROCESS (process
)->filter
, Qt
))
776 FD_SET (XINT (XPROCESS (process
)->infd
), &input_wait_mask
);
777 FD_SET (XINT (XPROCESS (process
)->infd
), &non_keyboard_wait_mask
);
779 XPROCESS (process
)->filter
= filter
;
783 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
785 "Returns the filter function of PROCESS; nil if none.\n\
786 See `set-process-filter' for more info on filter functions.")
788 register Lisp_Object process
;
790 CHECK_PROCESS (process
, 0);
791 return XPROCESS (process
)->filter
;
794 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
796 "Give PROCESS the sentinel SENTINEL; nil for none.\n\
797 The sentinel is called as a function when the process changes state.\n\
798 It gets two arguments: the process, and a string describing the change.")
800 register Lisp_Object process
, sentinel
;
802 CHECK_PROCESS (process
, 0);
803 XPROCESS (process
)->sentinel
= sentinel
;
807 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
809 "Return the sentinel of PROCESS; nil if none.\n\
810 See `set-process-sentinel' for more info on sentinels.")
812 register Lisp_Object process
;
814 CHECK_PROCESS (process
, 0);
815 return XPROCESS (process
)->sentinel
;
818 DEFUN ("set-process-window-size", Fset_process_window_size
,
819 Sset_process_window_size
, 3, 3, 0,
820 "Tell PROCESS that it has logical window size HEIGHT and WIDTH.")
821 (process
, height
, width
)
822 register Lisp_Object process
, height
, width
;
824 CHECK_PROCESS (process
, 0);
825 CHECK_NATNUM (height
, 0);
826 CHECK_NATNUM (width
, 0);
827 if (set_window_size (XINT (XPROCESS (process
)->infd
),
828 XINT (height
), XINT(width
)) <= 0)
834 DEFUN ("process-kill-without-query", Fprocess_kill_without_query
,
835 Sprocess_kill_without_query
, 1, 2, 0,
836 "Say no query needed if PROCESS is running when Emacs is exited.\n\
837 Optional second argument if non-nil says to require a query.\n\
838 Value is t if a query was formerly required.")
840 register Lisp_Object process
, value
;
844 CHECK_PROCESS (process
, 0);
845 tem
= XPROCESS (process
)->kill_without_query
;
846 XPROCESS (process
)->kill_without_query
= Fnull (value
);
851 #if 0 /* Turned off because we don't currently record this info
852 in the process. Perhaps add it. */
853 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
854 "Return the connection type of `PROCESS'.\n\
855 The value is `nil' for a pipe,\n\
856 `t' or `pty' for a pty, or `stream' for a socket connection.")
860 return XPROCESS (process
)->type
;
867 register Lisp_Object tail
, tem
;
868 Lisp_Object proc
, minspace
, tem1
;
869 register struct buffer
*old
= current_buffer
;
870 register struct Lisp_Process
*p
;
874 XSETFASTINT (minspace
, 1);
876 set_buffer_internal (XBUFFER (Vstandard_output
));
877 Fbuffer_disable_undo (Vstandard_output
);
879 current_buffer
->truncate_lines
= Qt
;
882 Proc Status Buffer Tty Command\n\
883 ---- ------ ------ --- -------\n", -1);
885 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
889 proc
= Fcdr (Fcar (tail
));
891 if (NILP (p
->childp
))
894 Finsert (1, &p
->name
);
895 Findent_to (make_number (13), minspace
);
897 if (!NILP (p
->raw_status_low
))
900 if (CONSP (p
->status
))
901 symbol
= XCONS (p
->status
)->car
;
904 if (EQ (symbol
, Qsignal
))
907 tem
= Fcar (Fcdr (p
->status
));
909 if (XINT (tem
) < NSIG
)
910 write_string (sys_errlist
[XINT (tem
)], -1);
913 Fprinc (symbol
, Qnil
);
915 else if (NETCONN_P (proc
))
917 if (EQ (symbol
, Qrun
))
918 write_string ("open", -1);
919 else if (EQ (symbol
, Qexit
))
920 write_string ("closed", -1);
922 Fprinc (symbol
, Qnil
);
925 Fprinc (symbol
, Qnil
);
927 if (EQ (symbol
, Qexit
))
930 tem
= Fcar (Fcdr (p
->status
));
933 sprintf (tembuf
, " %d", (int) XFASTINT (tem
));
934 write_string (tembuf
, -1);
938 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
939 remove_process (proc
);
941 Findent_to (make_number (22), minspace
);
942 if (NILP (p
->buffer
))
943 insert_string ("(none)");
944 else if (NILP (XBUFFER (p
->buffer
)->name
))
945 insert_string ("(Killed)");
947 Finsert (1, &XBUFFER (p
->buffer
)->name
);
949 Findent_to (make_number (37), minspace
);
951 if (STRINGP (p
->tty_name
))
952 Finsert (1, &p
->tty_name
);
954 insert_string ("(none)");
956 Findent_to (make_number (49), minspace
);
958 if (NETCONN_P (proc
))
960 sprintf (tembuf
, "(network stream connection to %s)\n",
961 XSTRING (p
->childp
)->data
);
962 insert_string (tembuf
);
976 insert_string ("\n");
982 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 0, "",
983 "Display a list of all processes.\n\
984 \(Any processes listed as Exited or Signaled are actually eliminated\n\
985 after the listing is made.)")
988 internal_with_output_to_temp_buffer ("*Process List*",
989 list_processes_1
, Qnil
);
993 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
994 "Return a list of all processes.")
997 return Fmapcar (Qcdr
, Vprocess_alist
);
1000 /* Starting asynchronous inferior processes. */
1002 static Lisp_Object
start_process_unwind ();
1004 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1005 "Start a program in a subprocess. Return the process object for it.\n\
1006 Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\
1007 NAME is name for process. It is modified if necessary to make it unique.\n\
1008 BUFFER is the buffer or (buffer-name) to associate with the process.\n\
1009 Process output goes at end of that buffer, unless you specify\n\
1010 an output stream or filter function to handle the output.\n\
1011 BUFFER may be also nil, meaning that this process is not associated\n\
1013 Third arg is program file name. It is searched for as in the shell.\n\
1014 Remaining arguments are strings to give program as arguments.")
1017 register Lisp_Object
*args
;
1019 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1021 register unsigned char *new_argv
;
1024 register unsigned char **new_argv
;
1027 int count
= specpdl_ptr
- specpdl
;
1031 buffer
= Fget_buffer_create (buffer
);
1033 /* Make sure that the child will be able to chdir to the current
1034 buffer's current directory, or its unhandled equivalent. We
1035 can't just have the child check for an error when it does the
1036 chdir, since it's in a vfork.
1038 We have to GCPRO around this because Fexpand_file_name and
1039 Funhandled_file_name_directory might call a file name handling
1040 function. The argument list is protected by the caller, so all
1041 we really have to worry about is buffer. */
1043 struct gcpro gcpro1
, gcpro2
;
1045 current_dir
= current_buffer
->directory
;
1047 GCPRO2 (buffer
, current_dir
);
1050 = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir
),
1052 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1053 report_file_error ("Setting current directory",
1054 Fcons (current_buffer
->directory
, Qnil
));
1060 CHECK_STRING (name
, 0);
1064 CHECK_STRING (program
, 2);
1067 /* Make a one member argv with all args concatenated
1068 together separated by a blank. */
1069 len
= XSTRING (program
)->size
+ 2;
1070 for (i
= 3; i
< nargs
; i
++)
1073 CHECK_STRING (tem
, i
);
1074 len
+= XSTRING (tem
)->size
+ 1; /* count the blank */
1076 new_argv
= (unsigned char *) alloca (len
);
1077 strcpy (new_argv
, XSTRING (program
)->data
);
1078 for (i
= 3; i
< nargs
; i
++)
1081 CHECK_STRING (tem
, i
);
1082 strcat (new_argv
, " ");
1083 strcat (new_argv
, XSTRING (tem
)->data
);
1085 /* Need to add code here to check for program existence on VMS */
1088 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1090 /* If program file name is not absolute, search our path for it */
1091 if (!IS_DIRECTORY_SEP (XSTRING (program
)->data
[0])
1092 && !(XSTRING (program
)->size
> 1
1093 && IS_DEVICE_SEP (XSTRING (program
)->data
[1])))
1095 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1098 GCPRO4 (name
, program
, buffer
, current_dir
);
1099 openp (Vexec_path
, program
, EXEC_SUFFIXES
, &tem
, 1);
1102 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1103 tem
= Fexpand_file_name (tem
, Qnil
);
1104 new_argv
[0] = XSTRING (tem
)->data
;
1108 if (!NILP (Ffile_directory_p (program
)))
1109 error ("Specified program for new process is a directory");
1111 new_argv
[0] = XSTRING (program
)->data
;
1114 for (i
= 3; i
< nargs
; i
++)
1117 CHECK_STRING (tem
, i
);
1118 new_argv
[i
- 2] = XSTRING (tem
)->data
;
1120 new_argv
[i
- 2] = 0;
1121 #endif /* not VMS */
1123 proc
= make_process (name
);
1124 /* If an error occurs and we can't start the process, we want to
1125 remove it from the process list. This means that each error
1126 check in create_process doesn't need to call remove_process
1127 itself; it's all taken care of here. */
1128 record_unwind_protect (start_process_unwind
, proc
);
1130 XPROCESS (proc
)->childp
= Qt
;
1131 XPROCESS (proc
)->command_channel_p
= Qnil
;
1132 XPROCESS (proc
)->buffer
= buffer
;
1133 XPROCESS (proc
)->sentinel
= Qnil
;
1134 XPROCESS (proc
)->filter
= Qnil
;
1135 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1137 /* Make the process marker point into the process buffer (if any). */
1139 Fset_marker (XPROCESS (proc
)->mark
,
1140 make_number (BUF_ZV (XBUFFER (buffer
))), buffer
);
1142 create_process (proc
, new_argv
, current_dir
);
1144 return unbind_to (count
, proc
);
1147 /* This function is the unwind_protect form for Fstart_process. If
1148 PROC doesn't have its pid set, then we know someone has signaled
1149 an error and the process wasn't started successfully, so we should
1150 remove it from the process list. */
1152 start_process_unwind (proc
)
1155 if (!PROCESSP (proc
))
1158 /* Was PROC started successfully? */
1159 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1160 remove_process (proc
);
1167 create_process_1 (signo
)
1171 /* USG systems forget handlers when they are used;
1172 must reestablish each time */
1173 signal (signo
, create_process_1
);
1177 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1180 /* Mimic blocking of signals on system V, which doesn't really have it. */
1182 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1183 int sigchld_deferred
;
1186 create_process_sigchld ()
1188 signal (SIGCHLD
, create_process_sigchld
);
1190 sigchld_deferred
= 1;
1196 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1197 create_process (process
, new_argv
, current_dir
)
1198 Lisp_Object process
;
1200 Lisp_Object current_dir
;
1202 int pid
, inchannel
, outchannel
;
1204 #ifdef POSIX_SIGNALS
1207 struct sigaction sigint_action
;
1208 struct sigaction sigquit_action
;
1210 struct sigaction sighup_action
;
1212 #else /* !POSIX_SIGNALS */
1214 SIGTYPE (*sigchld
)();
1216 #endif /* !POSIX_SIGNALS */
1217 /* Use volatile to protect variables from being clobbered by longjmp. */
1218 volatile int forkin
, forkout
;
1219 volatile int pty_flag
= 0;
1220 extern char **environ
;
1222 inchannel
= outchannel
= -1;
1225 if (!NILP (Vprocess_connection_type
))
1226 outchannel
= inchannel
= allocate_pty ();
1231 /* On USG systems it does not work to open the pty's tty here
1232 and then close and reopen it in the child. */
1234 /* Don't let this terminal become our controlling terminal
1235 (in case we don't have one). */
1236 forkout
= forkin
= open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1238 forkout
= forkin
= open (pty_name
, O_RDWR
, 0);
1241 report_file_error ("Opening pty", Qnil
);
1243 forkin
= forkout
= -1;
1244 #endif /* not USG */
1248 #endif /* HAVE_PTYS */
1251 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1252 report_file_error ("Opening socketpair", Qnil
);
1253 outchannel
= inchannel
= sv
[0];
1254 forkout
= forkin
= sv
[1];
1256 #else /* not SKTPAIR */
1265 #endif /* not SKTPAIR */
1268 /* Replaced by close_process_descs */
1269 set_exclusive_use (inchannel
);
1270 set_exclusive_use (outchannel
);
1273 /* Stride people say it's a mystery why this is needed
1274 as well as the O_NDELAY, but that it fails without this. */
1275 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1278 ioctl (inchannel
, FIONBIO
, &one
);
1283 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1284 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1287 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1288 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1292 /* Record this as an active process, with its channels.
1293 As a result, child_setup will close Emacs's side of the pipes. */
1294 chan_process
[inchannel
] = process
;
1295 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1296 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1297 /* Record the tty descriptor used in the subprocess. */
1299 XPROCESS (process
)->subtty
= Qnil
;
1301 XSETFASTINT (XPROCESS (process
)->subtty
, forkin
);
1302 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1303 XPROCESS (process
)->status
= Qrun
;
1305 /* Delay interrupts until we have a chance to store
1306 the new fork's pid in its process structure */
1307 #ifdef POSIX_SIGNALS
1308 sigemptyset (&blocked
);
1310 sigaddset (&blocked
, SIGCHLD
);
1313 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1314 this sets the parent's signal handlers as well as the child's.
1315 So delay all interrupts whose handlers the child might munge,
1316 and record the current handlers so they can be restored later. */
1317 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1318 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1320 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1322 #endif /* HAVE_VFORK */
1323 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1324 #else /* !POSIX_SIGNALS */
1328 #else /* not BSD4_1 */
1329 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1330 sigsetmask (sigmask (SIGCHLD
));
1331 #else /* ordinary USG */
1333 sigchld_deferred
= 0;
1334 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1336 #endif /* ordinary USG */
1337 #endif /* not BSD4_1 */
1338 #endif /* SIGCHLD */
1339 #endif /* !POSIX_SIGNALS */
1341 FD_SET (inchannel
, &input_wait_mask
);
1342 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1343 if (inchannel
> max_process_desc
)
1344 max_process_desc
= inchannel
;
1346 /* Until we store the proper pid, enable sigchld_handler
1347 to recognize an unknown pid as standing for this process.
1348 It is very important not to let this `marker' value stay
1349 in the table after this function has returned; if it does
1350 it might cause call-process to hang and subsequent asynchronous
1351 processes to get their return values scrambled. */
1352 XSETINT (XPROCESS (process
)->pid
, -1);
1355 /* child_setup must clobber environ on systems with true vfork.
1356 Protect it from permanent change. */
1357 char **save_environ
= environ
;
1362 #endif /* not WINDOWSNT */
1364 int xforkin
= forkin
;
1365 int xforkout
= forkout
;
1367 #if 0 /* This was probably a mistake--it duplicates code later on,
1368 but fails to handle all the cases. */
1369 /* Make sure SIGCHLD is not blocked in the child. */
1370 sigsetmask (SIGEMPTYMASK
);
1373 /* Make the pty be the controlling terminal of the process. */
1375 /* First, disconnect its current controlling terminal. */
1377 /* We tried doing setsid only if pty_flag, but it caused
1378 process_set_signal to fail on SGI when using a pipe. */
1380 /* Make the pty's terminal the controlling terminal. */
1384 /* We ignore the return value
1385 because faith@cs.unc.edu says that is necessary on Linux. */
1386 ioctl (xforkin
, TIOCSCTTY
, 0);
1389 #else /* not HAVE_SETSID */
1391 /* It's very important to call setpgrp here and no time
1392 afterwards. Otherwise, we lose our controlling tty which
1393 is set when we open the pty. */
1396 #endif /* not HAVE_SETSID */
1397 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1398 if (pty_flag
&& xforkin
>= 0)
1401 tcgetattr (xforkin
, &t
);
1403 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1404 write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1407 #if defined (NTTYDISC) && defined (TIOCSETD)
1408 if (pty_flag
&& xforkin
>= 0)
1410 /* Use new line discipline. */
1411 int ldisc
= NTTYDISC
;
1412 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1417 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1418 can do TIOCSPGRP only to the process's controlling tty. */
1421 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1422 I can't test it since I don't have 4.3. */
1423 int j
= open ("/dev/tty", O_RDWR
, 0);
1424 ioctl (j
, TIOCNOTTY
, 0);
1427 /* In order to get a controlling terminal on some versions
1428 of BSD, it is necessary to put the process in pgrp 0
1429 before it opens the terminal. */
1437 #endif /* TIOCNOTTY */
1439 #if !defined (RTU) && !defined (UNIPLUS)
1440 /*** There is a suggestion that this ought to be a
1441 conditional on TIOCSPGRP. */
1442 /* Now close the pty (if we had it open) and reopen it.
1443 This makes the pty the controlling terminal of the subprocess. */
1446 #ifdef SET_CHILD_PTY_PGRP
1447 int pgrp
= getpid ();
1450 /* I wonder if close (open (pty_name, ...)) would work? */
1453 xforkout
= xforkin
= open (pty_name
, O_RDWR
, 0);
1457 write (1, "Couldn't open the pty terminal ", 31);
1458 write (1, pty_name
, strlen (pty_name
));
1463 #ifdef SET_CHILD_PTY_PGRP
1464 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1465 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1468 #endif /* not UNIPLUS and not RTU */
1469 #ifdef SETUP_SLAVE_PTY
1474 #endif /* SETUP_SLAVE_PTY */
1476 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1477 Now reenable it in the child, so it will die when we want it to. */
1479 signal (SIGHUP
, SIG_DFL
);
1481 #endif /* HAVE_PTYS */
1483 signal (SIGINT
, SIG_DFL
);
1484 signal (SIGQUIT
, SIG_DFL
);
1486 /* Stop blocking signals in the child. */
1487 #ifdef POSIX_SIGNALS
1488 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1489 #else /* !POSIX_SIGNALS */
1493 #else /* not BSD4_1 */
1494 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1495 sigsetmask (SIGEMPTYMASK
);
1496 #else /* ordinary USG */
1498 signal (SIGCHLD
, sigchld
);
1500 #endif /* ordinary USG */
1501 #endif /* not BSD4_1 */
1502 #endif /* SIGCHLD */
1503 #endif /* !POSIX_SIGNALS */
1506 child_setup_tty (xforkout
);
1508 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1509 new_argv
, 1, current_dir
);
1510 #else /* not WINDOWSNT */
1511 child_setup (xforkin
, xforkout
, xforkout
,
1512 new_argv
, 1, current_dir
);
1513 #endif /* not WINDOWSNT */
1515 environ
= save_environ
;
1518 /* This runs in the Emacs process. */
1523 if (forkin
!= forkout
&& forkout
>= 0)
1528 /* vfork succeeded. */
1529 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
1532 register_child (pid
, inchannel
);
1533 #endif /* WINDOWSNT */
1535 /* If the subfork execv fails, and it exits,
1536 this close hangs. I don't know why.
1537 So have an interrupt jar it loose. */
1539 signal (SIGALRM
, create_process_1
);
1541 XPROCESS (process
)->subtty
= Qnil
;
1546 if (forkin
!= forkout
&& forkout
>= 0)
1551 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1554 XPROCESS (process
)->tty_name
= Qnil
;
1557 /* Restore the signal state whether vfork succeeded or not.
1558 (We will signal an error, below, if it failed.) */
1559 #ifdef POSIX_SIGNALS
1561 /* Restore the parent's signal handlers. */
1562 sigaction (SIGINT
, &sigint_action
, 0);
1563 sigaction (SIGQUIT
, &sigquit_action
, 0);
1565 sigaction (SIGHUP
, &sighup_action
, 0);
1567 #endif /* HAVE_VFORK */
1568 /* Stop blocking signals in the parent. */
1569 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1570 #else /* !POSIX_SIGNALS */
1574 #else /* not BSD4_1 */
1575 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1576 sigsetmask (SIGEMPTYMASK
);
1577 #else /* ordinary USG */
1579 signal (SIGCHLD
, sigchld
);
1580 /* Now really handle any of these signals
1581 that came in during this function. */
1582 if (sigchld_deferred
)
1583 kill (getpid (), SIGCHLD
);
1585 #endif /* ordinary USG */
1586 #endif /* not BSD4_1 */
1587 #endif /* SIGCHLD */
1588 #endif /* !POSIX_SIGNALS */
1590 /* Now generate the error if vfork failed. */
1592 report_file_error ("Doing vfork", Qnil
);
1594 #endif /* not VMS */
1598 /* open a TCP network connection to a given HOST/SERVICE. Treated
1599 exactly like a normal process when reading and writing. Only
1600 differences are in status display and process deletion. A network
1601 connection has no PID; you cannot signal it. All you can do is
1602 deactivate and close it via delete-process */
1604 DEFUN ("open-network-stream", Fopen_network_stream
, Sopen_network_stream
,
1606 "Open a TCP connection for a service to a host.\n\
1607 Returns a subprocess-object to represent the connection.\n\
1608 Input and output work as for subprocesses; `delete-process' closes it.\n\
1609 Args are NAME BUFFER HOST SERVICE.\n\
1610 NAME is name for process. It is modified if necessary to make it unique.\n\
1611 BUFFER is the buffer (or buffer-name) to associate with the process.\n\
1612 Process output goes at end of that buffer, unless you specify\n\
1613 an output stream or filter function to handle the output.\n\
1614 BUFFER may be also nil, meaning that this process is not associated\n\
1616 Third arg is name of the host to connect to, or its IP address.\n\
1617 Fourth arg SERVICE is name of the service desired, or an integer\n\
1618 specifying a port number to connect to.")
1619 (name
, buffer
, host
, service
)
1620 Lisp_Object name
, buffer
, host
, service
;
1624 struct sockaddr_in address
;
1625 struct servent
*svc_info
;
1626 struct hostent
*host_info_ptr
, host_info
;
1627 char *(addr_list
[2]);
1628 IN_ADDR numeric_addr
;
1632 struct hostent host_info_fixed
;
1633 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1635 int count
= specpdl_ptr
- specpdl
;
1638 /* Ensure socket support is loaded if available. */
1639 init_winsock (TRUE
);
1642 GCPRO4 (name
, buffer
, host
, service
);
1643 CHECK_STRING (name
, 0);
1644 CHECK_STRING (host
, 0);
1645 if (INTEGERP (service
))
1646 port
= htons ((unsigned short) XINT (service
));
1649 CHECK_STRING (service
, 0);
1650 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
1652 error ("Unknown service \"%s\"", XSTRING (service
)->data
);
1653 port
= svc_info
->s_port
;
1656 /* Slow down polling to every ten seconds.
1657 Some kernels have a bug which causes retrying connect to fail
1658 after a connect. Polling can interfere with gethostbyname too. */
1659 #ifdef POLL_FOR_INPUT
1660 bind_polling_period (10);
1671 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
1674 if (! (host_info_ptr
== 0 && h_errno
== TRY_AGAIN
))
1677 Fsleep_for (make_number (1), Qnil
);
1679 if (host_info_ptr
== 0)
1680 /* Attempt to interpret host as numeric inet address */
1682 numeric_addr
= inet_addr ((char *) XSTRING (host
)->data
);
1683 if (NUMERIC_ADDR_ERROR
)
1684 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
1686 host_info_ptr
= &host_info
;
1687 host_info
.h_name
= 0;
1688 host_info
.h_aliases
= 0;
1689 host_info
.h_addrtype
= AF_INET
;
1691 /* Older machines have only one address slot called h_addr.
1692 Newer machines have h_addr_list, but #define h_addr to
1693 be its first element. */
1694 host_info
.h_addr_list
= &(addr_list
[0]);
1696 host_info
.h_addr
= (char*)(&numeric_addr
);
1698 /* numeric_addr isn't null-terminated; it has fixed length. */
1699 host_info
.h_length
= sizeof (numeric_addr
);
1702 bzero (&address
, sizeof address
);
1703 bcopy (host_info_ptr
->h_addr
, (char *) &address
.sin_addr
,
1704 host_info_ptr
->h_length
);
1705 address
.sin_family
= host_info_ptr
->h_addrtype
;
1706 address
.sin_port
= port
;
1708 s
= socket (host_info_ptr
->h_addrtype
, SOCK_STREAM
, 0);
1710 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1712 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
1713 when connect is interrupted. So let's not let it get interrupted.
1714 Note we do not turn off polling, because polling is only used
1715 when not interrupt_input, and thus not normally used on the systems
1716 which have this bug. On systems which use polling, there's no way
1717 to quit if polling is turned off. */
1718 if (interrupt_input
)
1726 if (connect (s
, (struct sockaddr
*) &address
, sizeof address
) == -1
1727 && errno
!= EISCONN
)
1735 if (errno
== EADDRINUSE
&& retry
< 20)
1737 /* A delay here is needed on some FreeBSD systems,
1738 and it is harmless, since this retrying takes time anyway
1739 and should be infrequent. */
1740 Fsleep_for (make_number (1), Qnil
);
1747 if (interrupt_input
)
1751 report_file_error ("connection failed",
1752 Fcons (host
, Fcons (name
, Qnil
)));
1757 #ifdef POLL_FOR_INPUT
1758 unbind_to (count
, Qnil
);
1761 if (interrupt_input
)
1765 s
= connect_server (0);
1767 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1768 send_command (s
, C_PORT
, 0, "%s:%d", XSTRING (host
)->data
, ntohs (port
));
1769 send_command (s
, C_DUMB
, 1, 0);
1775 report_file_error ("error duplicating socket", Fcons (name
, Qnil
));
1778 buffer
= Fget_buffer_create (buffer
);
1779 proc
= make_process (name
);
1781 chan_process
[inch
] = proc
;
1784 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
1787 fcntl (inch
, F_SETFL
, O_NDELAY
);
1791 XPROCESS (proc
)->childp
= host
;
1792 XPROCESS (proc
)->command_channel_p
= Qnil
;
1793 XPROCESS (proc
)->buffer
= buffer
;
1794 XPROCESS (proc
)->sentinel
= Qnil
;
1795 XPROCESS (proc
)->filter
= Qnil
;
1796 XPROCESS (proc
)->command
= Qnil
;
1797 XPROCESS (proc
)->pid
= Qnil
;
1798 XSETINT (XPROCESS (proc
)->infd
, inch
);
1799 XSETINT (XPROCESS (proc
)->outfd
, outch
);
1800 XPROCESS (proc
)->status
= Qrun
;
1801 FD_SET (inch
, &input_wait_mask
);
1802 FD_SET (inch
, &non_keyboard_wait_mask
);
1803 if (inch
> max_process_desc
)
1804 max_process_desc
= inch
;
1809 #endif /* HAVE_SOCKETS */
1811 deactivate_process (proc
)
1814 register int inchannel
, outchannel
;
1815 register struct Lisp_Process
*p
= XPROCESS (proc
);
1817 inchannel
= XINT (p
->infd
);
1818 outchannel
= XINT (p
->outfd
);
1822 /* Beware SIGCHLD hereabouts. */
1823 flush_pending_output (inchannel
);
1826 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
1827 sys$
dassgn (outchannel
);
1828 vs
= get_vms_process_pointer (p
->pid
);
1830 give_back_vms_process_stuff (vs
);
1834 if (outchannel
>= 0 && outchannel
!= inchannel
)
1838 XSETINT (p
->infd
, -1);
1839 XSETINT (p
->outfd
, -1);
1840 chan_process
[inchannel
] = Qnil
;
1841 FD_CLR (inchannel
, &input_wait_mask
);
1842 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
1843 if (inchannel
== max_process_desc
)
1846 /* We just closed the highest-numbered process input descriptor,
1847 so recompute the highest-numbered one now. */
1848 max_process_desc
= 0;
1849 for (i
= 0; i
< MAXDESC
; i
++)
1850 if (!NILP (chan_process
[i
]))
1851 max_process_desc
= i
;
1856 /* Close all descriptors currently in use for communication
1857 with subprocess. This is used in a newly-forked subprocess
1858 to get rid of irrelevant descriptors. */
1860 close_process_descs ()
1864 for (i
= 0; i
< MAXDESC
; i
++)
1866 Lisp_Object process
;
1867 process
= chan_process
[i
];
1868 if (!NILP (process
))
1870 int in
= XINT (XPROCESS (process
)->infd
);
1871 int out
= XINT (XPROCESS (process
)->outfd
);
1874 if (out
>= 0 && in
!= out
)
1881 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
1883 "Allow any pending output from subprocesses to be read by Emacs.\n\
1884 It is read into the process' buffers or given to their filter functions.\n\
1885 Non-nil arg PROCESS means do not return until some output has been received\n\
1887 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
1888 seconds and microseconds to wait; return after that much time whether\n\
1889 or not there is input.\n\
1890 Return non-nil iff we received any output before the timeout expired.")
1891 (process
, timeout
, timeout_msecs
)
1892 register Lisp_Object process
, timeout
, timeout_msecs
;
1897 if (! NILP (timeout_msecs
))
1899 CHECK_NUMBER (timeout_msecs
, 2);
1900 useconds
= XINT (timeout_msecs
);
1901 if (!INTEGERP (timeout
))
1902 XSETINT (timeout
, 0);
1905 int carry
= useconds
/ 1000000;
1907 XSETINT (timeout
, XINT (timeout
) + carry
);
1908 useconds
-= carry
* 1000000;
1910 /* I think this clause is necessary because C doesn't
1911 guarantee a particular rounding direction for negative
1915 XSETINT (timeout
, XINT (timeout
) - 1);
1916 useconds
+= 1000000;
1923 if (! NILP (timeout
))
1925 CHECK_NUMBER (timeout
, 1);
1926 seconds
= XINT (timeout
);
1927 if (seconds
< 0 || (seconds
== 0 && useconds
== 0))
1939 XSETFASTINT (process
, 0);
1942 (wait_reading_process_input (seconds
, useconds
, process
, 0)
1946 /* This variable is different from waiting_for_input in keyboard.c.
1947 It is used to communicate to a lisp process-filter/sentinel (via the
1948 function Fwaiting_for_user_input_p below) whether emacs was waiting
1949 for user-input when that process-filter was called.
1950 waiting_for_input cannot be used as that is by definition 0 when
1951 lisp code is being evalled.
1952 This is also used in record_asynch_buffer_change.
1953 For that purpose, this must be 0
1954 when not inside wait_reading_process_input. */
1955 static int waiting_for_user_input_p
;
1957 /* This is here so breakpoints can be put on it. */
1959 wait_reading_process_input_1 ()
1963 /* Read and dispose of subprocess output while waiting for timeout to
1964 elapse and/or keyboard input to be available.
1967 timeout in seconds, or
1968 zero for no limit, or
1969 -1 means gobble data immediately available but don't wait for any.
1972 an additional duration to wait, measured in microseconds.
1973 If this is nonzero and time_limit is 0, then the timeout
1974 consists of MICROSECS only.
1976 READ_KBD is a lisp value:
1977 0 to ignore keyboard input, or
1978 1 to return when input is available, or
1979 -1 meaning caller will actually read the input, so don't throw to
1980 the quit handler, or
1981 a cons cell, meaning wait until its car is non-nil
1982 (and gobble terminal input into the buffer if any arrives), or
1983 a process object, meaning wait until something arrives from that
1984 process. The return value is true iff we read some input from
1987 DO_DISPLAY != 0 means redisplay should be done to show subprocess
1988 output that arrives.
1990 If READ_KBD is a pointer to a struct Lisp_Process, then the
1991 function returns true iff we received input from that process
1992 before the timeout elapsed.
1993 Otherwise, return true iff we received input from any process. */
1995 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
1996 int time_limit
, microsecs
;
1997 Lisp_Object read_kbd
;
2000 register int channel
, nfds
, m
;
2001 static SELECT_TYPE Available
;
2004 EMACS_TIME timeout
, end_time
, garbage
;
2006 int wait_channel
= -1;
2007 struct Lisp_Process
*wait_proc
= 0;
2008 int got_some_input
= 0;
2009 Lisp_Object
*wait_for_cell
= 0;
2011 FD_ZERO (&Available
);
2013 /* If read_kbd is a process to watch, set wait_proc and wait_channel
2015 if (PROCESSP (read_kbd
))
2017 wait_proc
= XPROCESS (read_kbd
);
2018 wait_channel
= XINT (wait_proc
->infd
);
2019 XSETFASTINT (read_kbd
, 0);
2022 /* If waiting for non-nil in a cell, record where. */
2023 if (CONSP (read_kbd
))
2025 wait_for_cell
= &XCONS (read_kbd
)->car
;
2026 XSETFASTINT (read_kbd
, 0);
2029 waiting_for_user_input_p
= XINT (read_kbd
);
2031 /* Since we may need to wait several times,
2032 compute the absolute time to return at. */
2033 if (time_limit
|| microsecs
)
2035 EMACS_GET_TIME (end_time
);
2036 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
2037 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
2042 int timeout_reduced_for_timers
= 0;
2044 /* If calling from keyboard input, do not quit
2045 since we want to return C-g as an input character.
2046 Otherwise, do pending quit if requested. */
2047 if (XINT (read_kbd
) >= 0)
2050 /* Exit now if the cell we're waiting for became non-nil. */
2051 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2054 /* Compute time from now till when time limit is up */
2055 /* Exit if already run out */
2056 if (time_limit
== -1)
2058 /* -1 specified for timeout means
2059 gobble output available now
2060 but don't wait at all. */
2062 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2064 else if (time_limit
|| microsecs
)
2066 EMACS_GET_TIME (timeout
);
2067 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
2068 if (EMACS_TIME_NEG_P (timeout
))
2073 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
2076 /* Normally we run timers here.
2077 But not if wait_for_cell; in those cases,
2078 the wait is supposed to be short,
2079 and those callers cannot handle running arbitrary Lisp code here. */
2080 if (! wait_for_cell
)
2082 EMACS_TIME timer_delay
;
2086 old_timers_run
= timers_run
;
2087 timer_delay
= timer_check (1);
2088 if (timers_run
!= old_timers_run
&& do_display
)
2090 redisplay_preserve_echo_area ();
2091 /* We must retry, since a timer may have requeued itself
2092 and that could alter the time_delay. */
2096 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
2098 EMACS_TIME difference
;
2099 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
2100 if (EMACS_TIME_NEG_P (difference
))
2102 timeout
= timer_delay
;
2103 timeout_reduced_for_timers
= 1;
2106 /* If time_limit is -1, we are not going to wait at all. */
2107 else if (time_limit
!= -1)
2109 /* This is so a breakpoint can be put here. */
2110 wait_reading_process_input_1 ();
2114 /* Cause C-g and alarm signals to take immediate action,
2115 and cause input available signals to zero out timeout.
2117 It is important that we do this before checking for process
2118 activity. If we get a SIGCHLD after the explicit checks for
2119 process activity, timeout is the only way we will know. */
2120 if (XINT (read_kbd
) < 0)
2121 set_waiting_for_input (&timeout
);
2123 /* If status of something has changed, and no input is
2124 available, notify the user of the change right away. After
2125 this explicit check, we'll let the SIGCHLD handler zap
2126 timeout to get our attention. */
2127 if (update_tick
!= process_tick
&& do_display
)
2129 Atemp
= input_wait_mask
;
2130 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2131 if ((select (MAXDESC
, &Atemp
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2135 /* It's okay for us to do this and then continue with
2136 the loop, since timeout has already been zeroed out. */
2137 clear_waiting_for_input ();
2142 /* Don't wait for output from a non-running process. */
2143 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
2144 update_status (wait_proc
);
2146 && ! EQ (wait_proc
->status
, Qrun
))
2148 clear_waiting_for_input ();
2152 /* Wait till there is something to do */
2154 if (! XINT (read_kbd
) && wait_for_cell
== 0)
2155 Available
= non_keyboard_wait_mask
;
2157 Available
= input_wait_mask
;
2159 /* If frame size has changed or the window is newly mapped,
2160 redisplay now, before we start to wait. There is a race
2161 condition here; if a SIGIO arrives between now and the select
2162 and indicates that a frame is trashed, the select may block
2163 displaying a trashed screen. */
2164 if (frame_garbaged
&& do_display
)
2166 clear_waiting_for_input ();
2167 redisplay_preserve_echo_area ();
2168 if (XINT (read_kbd
) < 0)
2169 set_waiting_for_input (&timeout
);
2172 if (XINT (read_kbd
) && detect_input_pending ())
2175 FD_ZERO (&Available
);
2178 nfds
= select (MAXDESC
, &Available
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2183 /* Make C-g and alarm signals set flags again */
2184 clear_waiting_for_input ();
2186 /* If we woke up due to SIGWINCH, actually change size now. */
2187 do_pending_window_change ();
2189 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
2190 /* We wanted the full specified time, so return now. */
2194 if (xerrno
== EINTR
)
2195 FD_ZERO (&Available
);
2197 /* Ultrix select seems to return ENOMEM when it is
2198 interrupted. Treat it just like EINTR. Bleah. Note
2199 that we want to test for the "ultrix" CPP symbol, not
2200 "__ultrix__"; the latter is only defined under GCC, but
2201 not by DEC's bundled CC. -JimB */
2202 else if (xerrno
== ENOMEM
)
2203 FD_ZERO (&Available
);
2206 /* This happens for no known reason on ALLIANT.
2207 I am guessing that this is the right response. -- RMS. */
2208 else if (xerrno
== EFAULT
)
2209 FD_ZERO (&Available
);
2211 else if (xerrno
== EBADF
)
2214 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
2215 the child's closure of the pts gives the parent a SIGHUP, and
2216 the ptc file descriptor is automatically closed,
2217 yielding EBADF here or at select() call above.
2218 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
2219 in m/ibmrt-aix.h), and here we just ignore the select error.
2220 Cleanup occurs c/o status_notify after SIGCLD. */
2221 FD_ZERO (&Available
); /* Cannot depend on values returned */
2227 error ("select error: %s", strerror (xerrno
));
2229 #if defined(sun) && !defined(USG5_4)
2230 else if (nfds
> 0 && keyboard_bit_set (&Available
)
2232 /* System sometimes fails to deliver SIGIO.
2234 David J. Mackenzie says that Emacs doesn't compile under
2235 Solaris if this code is enabled, thus the USG5_4 in the CPP
2236 conditional. "I haven't noticed any ill effects so far.
2237 If you find a Solaris expert somewhere, they might know
2239 kill (getpid (), SIGIO
);
2242 /* Check for keyboard input */
2243 /* If there is any, return immediately
2244 to give it higher priority than subprocesses */
2246 if ((XINT (read_kbd
) != 0)
2247 && detect_input_pending_run_timers (do_display
))
2249 swallow_events (do_display
);
2250 if (detect_input_pending_run_timers (do_display
))
2254 /* If wait_for_cell. check for keyboard input
2255 but don't run any timers.
2256 ??? (It seems wrong to me to check for keyboard
2257 input at all when wait_for_cell, but the code
2258 has been this way since July 1994.
2259 Try changing this after version 19.31.) */
2261 && detect_input_pending ())
2263 swallow_events (do_display
);
2264 if (detect_input_pending ())
2268 /* Exit now if the cell we're waiting for became non-nil. */
2269 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2273 /* If we think we have keyboard input waiting, but didn't get SIGIO
2274 go read it. This can happen with X on BSD after logging out.
2275 In that case, there really is no input and no SIGIO,
2276 but select says there is input. */
2278 if (XINT (read_kbd
) && interrupt_input
2279 && (keyboard_bit_set (&Available
)))
2280 kill (getpid (), SIGIO
);
2284 got_some_input
|= nfds
> 0;
2286 /* If checking input just got us a size-change event from X,
2287 obey it now if we should. */
2288 if (XINT (read_kbd
) || wait_for_cell
)
2289 do_pending_window_change ();
2291 /* Check for data from a process. */
2292 /* Really FIRST_PROC_DESC should be 0 on Unix,
2293 but this is safer in the short run. */
2294 for (channel
= 0; channel
<= max_process_desc
; channel
++)
2296 if (FD_ISSET (channel
, &Available
)
2297 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
2301 /* If waiting for this channel, arrange to return as
2302 soon as no more input to be processed. No more
2304 if (wait_channel
== channel
)
2310 proc
= chan_process
[channel
];
2314 /* Read data from the process, starting with our
2315 buffered-ahead character if we have one. */
2317 nread
= read_process_output (proc
, channel
);
2320 /* Since read_process_output can run a filter,
2321 which can call accept-process-output,
2322 don't try to read from any other processes
2323 before doing the select again. */
2324 FD_ZERO (&Available
);
2327 redisplay_preserve_echo_area ();
2330 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2334 else if (nread
== -1 && errno
== EAGAIN
)
2338 else if (nread
== -1 && errno
== EAGAIN
)
2340 /* Note that we cannot distinguish between no input
2341 available now and a closed pipe.
2342 With luck, a closed pipe will be accompanied by
2343 subprocess termination and SIGCHLD. */
2344 else if (nread
== 0 && !NETCONN_P (proc
))
2346 #endif /* O_NDELAY */
2347 #endif /* O_NONBLOCK */
2348 #endif /* EWOULDBLOCK */
2350 /* On some OSs with ptys, when the process on one end of
2351 a pty exits, the other end gets an error reading with
2352 errno = EIO instead of getting an EOF (0 bytes read).
2353 Therefore, if we get an error reading and errno =
2354 EIO, just continue, because the child process has
2355 exited and should clean itself up soon (e.g. when we
2357 else if (nread
== -1 && errno
== EIO
)
2359 #endif /* HAVE_PTYS */
2360 /* If we can detect process termination, don't consider the process
2361 gone just because its pipe is closed. */
2363 else if (nread
== 0 && !NETCONN_P (proc
))
2368 /* Preserve status of processes already terminated. */
2369 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2370 deactivate_process (proc
);
2371 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2372 update_status (XPROCESS (proc
));
2373 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2374 XPROCESS (proc
)->status
2375 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2378 } /* end for each file descriptor */
2379 } /* end while exit conditions not met */
2381 waiting_for_user_input_p
= 0;
2383 /* If calling from keyboard input, do not quit
2384 since we want to return C-g as an input character.
2385 Otherwise, do pending quit if requested. */
2386 if (XINT (read_kbd
) >= 0)
2388 /* Prevent input_pending from remaining set if we quit. */
2389 clear_input_pending ();
2393 return got_some_input
;
2396 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
2399 read_process_output_call (fun_and_args
)
2400 Lisp_Object fun_and_args
;
2402 return apply1 (XCONS (fun_and_args
)->car
, XCONS (fun_and_args
)->cdr
);
2406 read_process_output_error_handler (error
)
2409 cmd_error_internal (error
, "error in process filter: ");
2411 update_echo_area ();
2412 Fsleep_for (make_number (2), Qnil
);
2415 /* Read pending output from the process channel,
2416 starting with our buffered-ahead character if we have one.
2417 Yield number of characters read.
2419 This function reads at most 1024 characters.
2420 If you want to read all available subprocess output,
2421 you must call it repeatedly until it returns zero. */
2423 read_process_output (proc
, channel
)
2425 register int channel
;
2427 register int nchars
;
2433 register Lisp_Object outstream
;
2434 register struct buffer
*old
= current_buffer
;
2435 register struct Lisp_Process
*p
= XPROCESS (proc
);
2436 register int opoint
;
2439 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2441 vs
= get_vms_process_pointer (p
->pid
);
2445 return(0); /* Really weird if it does this */
2446 if (!(vs
->iosb
[0] & 1))
2447 return -1; /* I/O error */
2450 error ("Could not get VMS process pointer");
2451 chars
= vs
->inputBuffer
;
2452 nchars
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2455 start_vms_process_read (vs
); /* Crank up the next read on the process */
2456 return 1; /* Nothing worth printing, say we got 1 */
2460 if (proc_buffered_char
[channel
] < 0)
2461 nchars
= read (channel
, chars
, sizeof (chars
));
2464 chars
[0] = proc_buffered_char
[channel
];
2465 proc_buffered_char
[channel
] = -1;
2466 nchars
= read (channel
, chars
+ 1, sizeof (chars
) - 1);
2470 nchars
= nchars
+ 1;
2472 #endif /* not VMS */
2474 if (nchars
<= 0) return nchars
;
2476 outstream
= p
->filter
;
2477 if (!NILP (outstream
))
2479 /* We inhibit quit here instead of just catching it so that
2480 hitting ^G when a filter happens to be running won't screw
2482 int count
= specpdl_ptr
- specpdl
;
2483 Lisp_Object odeactivate
;
2484 Lisp_Object obuffer
, okeymap
;
2486 /* No need to gcpro these, because all we do with them later
2487 is test them for EQness, and none of them should be a string. */
2488 odeactivate
= Vdeactivate_mark
;
2489 XSETBUFFER (obuffer
, current_buffer
);
2490 okeymap
= current_buffer
->keymap
;
2492 specbind (Qinhibit_quit
, Qt
);
2493 specbind (Qlast_nonmenu_event
, Qt
);
2495 running_asynch_code
= 1;
2496 internal_condition_case_1 (read_process_output_call
,
2499 Fcons (make_string (chars
,
2502 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
2503 read_process_output_error_handler
);
2504 running_asynch_code
= 0;
2505 restore_match_data ();
2507 /* Handling the process output should not deactivate the mark. */
2508 Vdeactivate_mark
= odeactivate
;
2510 #if 0 /* Call record_asynch_buffer_change unconditionally,
2511 because we might have changed minor modes or other things
2512 that affect key bindings. */
2513 if (! EQ (Fcurrent_buffer (), obuffer
)
2514 || ! EQ (current_buffer
->keymap
, okeymap
))
2516 /* But do it only if the caller is actually going to read events.
2517 Otherwise there's no need to make him wake up, and it could
2518 cause trouble (for example it would make Fsit_for return). */
2519 if (waiting_for_user_input_p
== -1)
2520 record_asynch_buffer_change ();
2523 start_vms_process_read (vs
);
2525 unbind_to (count
, Qnil
);
2529 /* If no filter, write into buffer if it isn't dead. */
2530 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2532 Lisp_Object old_read_only
;
2533 Lisp_Object old_begv
, old_zv
;
2534 Lisp_Object odeactivate
;
2536 odeactivate
= Vdeactivate_mark
;
2538 Fset_buffer (p
->buffer
);
2540 old_read_only
= current_buffer
->read_only
;
2541 XSETFASTINT (old_begv
, BEGV
);
2542 XSETFASTINT (old_zv
, ZV
);
2544 current_buffer
->read_only
= Qnil
;
2546 /* Insert new output into buffer
2547 at the current end-of-output marker,
2548 thus preserving logical ordering of input and output. */
2549 if (XMARKER (p
->mark
)->buffer
)
2550 SET_PT (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
));
2554 /* If the output marker is outside of the visible region, save
2555 the restriction and widen. */
2556 if (! (BEGV
<= point
&& point
<= ZV
))
2559 /* Make sure opoint floats ahead of any new text, just as point
2561 if (point
<= opoint
)
2564 /* Insert after old_begv, but before old_zv. */
2565 if (point
< XFASTINT (old_begv
))
2566 XSETFASTINT (old_begv
, XFASTINT (old_begv
) + nchars
);
2567 if (point
<= XFASTINT (old_zv
))
2568 XSETFASTINT (old_zv
, XFASTINT (old_zv
) + nchars
);
2570 /* Insert before markers in case we are inserting where
2571 the buffer's mark is, and the user's next command is Meta-y. */
2572 insert_before_markers (chars
, nchars
);
2573 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
2575 update_mode_lines
++;
2577 /* If the restriction isn't what it should be, set it. */
2578 if (XFASTINT (old_begv
) != BEGV
|| XFASTINT (old_zv
) != ZV
)
2579 Fnarrow_to_region (old_begv
, old_zv
);
2581 /* Handling the process output should not deactivate the mark. */
2582 Vdeactivate_mark
= odeactivate
;
2584 current_buffer
->read_only
= old_read_only
;
2586 set_buffer_internal (old
);
2589 start_vms_process_read (vs
);
2594 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
2596 "Returns non-nil if emacs is waiting for input from the user.\n\
2597 This is intended for use by asynchronous process output filters and sentinels.")
2600 return (waiting_for_user_input_p
? Qt
: Qnil
);
2603 /* Sending data to subprocess */
2605 jmp_buf send_process_frame
;
2608 send_process_trap ()
2614 longjmp (send_process_frame
, 1);
2617 /* Send some data to process PROC.
2618 BUF is the beginning of the data; LEN is the number of characters.
2619 OBJECT is the Lisp object that the data comes from. */
2621 send_process (proc
, buf
, len
, object
)
2622 volatile Lisp_Object proc
;
2627 /* Use volatile to protect variables from being clobbered by longjmp. */
2629 volatile unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
2632 struct Lisp_Process
*p
= XPROCESS (proc
);
2633 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2636 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2637 update_status (XPROCESS (proc
));
2638 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2639 error ("Process %s not running", procname
);
2642 vs
= get_vms_process_pointer (p
->pid
);
2644 error ("Could not find this process: %x", p
->pid
);
2645 else if (write_to_vms_process (vs
, buf
, len
))
2649 if (pty_max_bytes
== 0)
2651 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
2652 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
2654 if (pty_max_bytes
< 0)
2655 pty_max_bytes
= 250;
2657 pty_max_bytes
= 250;
2659 /* Deduct one, to leave space for the eof. */
2663 if (!setjmp (send_process_frame
))
2667 SIGTYPE (*old_sigpipe
)();
2670 /* Decide how much data we can send in one batch.
2671 Long lines need to be split into multiple batches. */
2672 if (!NILP (XPROCESS (proc
)->pty_flag
))
2674 /* Starting this at zero is always correct when not the first iteration
2675 because the previous iteration ended by sending C-d.
2676 It may not be correct for the first iteration
2677 if a partial line was sent in a separate send_process call.
2678 If that proves worth handling, we need to save linepos
2679 in the process object. */
2682 char *end
= buf
+ len
;
2684 /* Scan through this text for a line that is too long. */
2685 while (ptr
!= end
&& linepos
< pty_max_bytes
)
2693 /* If we found one, break the line there
2694 and put in a C-d to force the buffer through. */
2698 /* Send this batch, using one or more write calls. */
2701 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
2702 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
2703 signal (SIGPIPE
, old_sigpipe
);
2709 || errno
== EWOULDBLOCK
2715 /* Buffer is full. Wait, accepting input;
2716 that may allow the program
2717 to finish doing output and read more. */
2722 /* Running filters might relocate buffers or strings.
2723 Arrange to relocate BUF. */
2724 if (BUFFERP (object
))
2725 offset
= BUF_PTR_CHAR_POS (XBUFFER (object
),
2726 (unsigned char *) buf
);
2727 else if (STRINGP (object
))
2728 offset
= buf
- (char *) XSTRING (object
)->data
;
2730 XSETFASTINT (zero
, 0);
2731 wait_reading_process_input (1, 0, zero
, 0);
2733 if (BUFFERP (object
))
2734 buf
= (char *) BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
2735 else if (STRINGP (object
))
2736 buf
= offset
+ (char *) XSTRING (object
)->data
;
2741 /* This is a real error. */
2742 report_file_error ("writing to process", Fcons (proc
, Qnil
));
2749 /* If we sent just part of the string, put in an EOF
2750 to force it through, before we send the rest. */
2752 Fprocess_send_eof (proc
);
2757 XPROCESS (proc
)->raw_status_low
= Qnil
;
2758 XPROCESS (proc
)->raw_status_high
= Qnil
;
2759 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2760 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2761 deactivate_process (proc
);
2763 error ("Error writing to process %s; closed it", procname
);
2765 error ("SIGPIPE raised on process %s; closed it", procname
);
2770 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
2772 "Send current contents of region as input to PROCESS.\n\
2773 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2774 nil, indicating the current buffer's process.\n\
2775 Called from program, takes three arguments, PROCESS, START and END.\n\
2776 If the region is more than 500 characters long,\n\
2777 it is sent in several bunches. This may happen even for shorter regions.\n\
2778 Output from processes can arrive in between bunches.")
2779 (process
, start
, end
)
2780 Lisp_Object process
, start
, end
;
2785 proc
= get_process (process
);
2786 validate_region (&start
, &end
);
2788 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
2791 start1
= XINT (start
);
2792 send_process (proc
, &FETCH_CHAR (start1
), XINT (end
) - XINT (start
),
2793 Fcurrent_buffer ());
2798 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
2800 "Send PROCESS the contents of STRING as input.\n\
2801 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2802 nil, indicating the current buffer's process.\n\
2803 If STRING is more than 500 characters long,\n\
2804 it is sent in several bunches. This may happen even for shorter strings.\n\
2805 Output from processes can arrive in between bunches.")
2807 Lisp_Object process
, string
;
2810 CHECK_STRING (string
, 1);
2811 proc
= get_process (process
);
2812 send_process (proc
, XSTRING (string
)->data
, XSTRING (string
)->size
, string
);
2816 /* send a signal number SIGNO to PROCESS.
2817 CURRENT_GROUP means send to the process group that currently owns
2818 the terminal being used to communicate with PROCESS.
2819 This is used for various commands in shell mode.
2820 If NOMSG is zero, insert signal-announcements into process's buffers
2823 If we can, we try to signal PROCESS by sending control characters
2824 down the pty. This allows us to signal inferiors who have changed
2825 their uid, for which killpg would return an EPERM error. */
2828 process_send_signal (process
, signo
, current_group
, nomsg
)
2829 Lisp_Object process
;
2831 Lisp_Object current_group
;
2835 register struct Lisp_Process
*p
;
2839 proc
= get_process (process
);
2840 p
= XPROCESS (proc
);
2842 if (!EQ (p
->childp
, Qt
))
2843 error ("Process %s is not a subprocess",
2844 XSTRING (p
->name
)->data
);
2845 if (XINT (p
->infd
) < 0)
2846 error ("Process %s is not active",
2847 XSTRING (p
->name
)->data
);
2849 if (NILP (p
->pty_flag
))
2850 current_group
= Qnil
;
2852 /* If we are using pgrps, get a pgrp number and make it negative. */
2853 if (!NILP (current_group
))
2855 #ifdef SIGNALS_VIA_CHARACTERS
2856 /* If possible, send signals to the entire pgrp
2857 by sending an input character to it. */
2859 /* TERMIOS is the latest and bestest, and seems most likely to
2860 work. If the system has it, use it. */
2867 tcgetattr (XINT (p
->infd
), &t
);
2868 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2872 tcgetattr (XINT (p
->infd
), &t
);
2873 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2877 tcgetattr (XINT (p
->infd
), &t
);
2878 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
2879 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2881 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
2886 #else /* ! HAVE_TERMIOS */
2888 /* On Berkeley descendants, the following IOCTL's retrieve the
2889 current control characters. */
2890 #if defined (TIOCGLTC) && defined (TIOCGETC)
2898 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2899 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
2902 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2903 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
2907 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
2908 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
2910 #endif /* ! defined (SIGTSTP) */
2913 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2915 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
2922 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2923 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2926 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2927 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2931 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2932 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2934 #endif /* ! defined (SIGTSTP) */
2936 #else /* ! defined (TCGETA) */
2937 Your configuration files are messed up
.
2938 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
2939 you'd better be using one of the alternatives above! */
2940 #endif /* ! defined (TCGETA) */
2941 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2942 #endif /* ! defined HAVE_TERMIOS */
2943 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
2946 /* Get the pgrp using the tty itself, if we have that.
2947 Otherwise, use the pty to get the pgrp.
2948 On pfa systems, saka@pfu.fujitsu.co.JP writes:
2949 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
2950 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
2951 His patch indicates that if TIOCGPGRP returns an error, then
2952 we should just assume that p->pid is also the process group id. */
2956 if (!NILP (p
->subtty
))
2957 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
2959 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
2963 gid
= - XFASTINT (p
->pid
);
2964 #endif /* ! defined (pfa) */
2970 #else /* ! defined (TIOCGPGRP ) */
2971 /* Can't select pgrps on this system, so we know that
2972 the child itself heads the pgrp. */
2973 gid
= - XFASTINT (p
->pid
);
2974 #endif /* ! defined (TIOCGPGRP ) */
2977 gid
= - XFASTINT (p
->pid
);
2983 p
->raw_status_low
= Qnil
;
2984 p
->raw_status_high
= Qnil
;
2986 XSETINT (p
->tick
, ++process_tick
);
2990 #endif /* ! defined (SIGCONT) */
2993 send_process (proc
, "\003", 1, Qnil
); /* ^C */
2998 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
3003 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
3006 flush_pending_output (XINT (p
->infd
));
3010 /* If we don't have process groups, send the signal to the immediate
3011 subprocess. That isn't really right, but it's better than any
3012 obvious alternative. */
3015 kill (XFASTINT (p
->pid
), signo
);
3019 /* gid may be a pid, or minus a pgrp's number */
3021 if (!NILP (current_group
))
3022 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
3025 gid
= - XFASTINT (p
->pid
);
3028 #else /* ! defined (TIOCSIGSEND) */
3029 EMACS_KILLPG (-gid
, signo
);
3030 #endif /* ! defined (TIOCSIGSEND) */
3033 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
3034 "Interrupt process PROCESS. May be process or name of one.\n\
3035 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
3036 nil or no arg means current buffer's process.\n\
3037 Second arg CURRENT-GROUP non-nil means send signal to\n\
3038 the current process-group of the process's controlling terminal\n\
3039 rather than to the process's own process group.\n\
3040 If the process is a shell, this means interrupt current subjob\n\
3041 rather than the shell.")
3042 (process
, current_group
)
3043 Lisp_Object process
, current_group
;
3045 process_send_signal (process
, SIGINT
, current_group
, 0);
3049 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
3050 "Kill process PROCESS. May be process or name of one.\n\
3051 See function `interrupt-process' for more details on usage.")
3052 (process
, current_group
)
3053 Lisp_Object process
, current_group
;
3055 process_send_signal (process
, SIGKILL
, current_group
, 0);
3059 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
3060 "Send QUIT signal to process PROCESS. May be process or name of one.\n\
3061 See function `interrupt-process' for more details on usage.")
3062 (process
, current_group
)
3063 Lisp_Object process
, current_group
;
3065 process_send_signal (process
, SIGQUIT
, current_group
, 0);
3069 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
3070 "Stop process PROCESS. May be process or name of one.\n\
3071 See function `interrupt-process' for more details on usage.")
3072 (process
, current_group
)
3073 Lisp_Object process
, current_group
;
3076 error ("no SIGTSTP support");
3078 process_send_signal (process
, SIGTSTP
, current_group
, 0);
3083 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
3084 "Continue process PROCESS. May be process or name of one.\n\
3085 See function `interrupt-process' for more details on usage.")
3086 (process
, current_group
)
3087 Lisp_Object process
, current_group
;
3090 process_send_signal (process
, SIGCONT
, current_group
, 0);
3092 error ("no SIGCONT support");
3097 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
3098 2, 2, "nProcess number: \nnSignal code: ",
3099 "Send the process with process id PID the signal with code SIGCODE.\n\
3100 PID must be an integer. The process need not be a child of this Emacs.\n\
3101 SIGCODE may be an integer, or a symbol whose name is a signal name.")
3103 Lisp_Object pid
, sigcode
;
3105 CHECK_NUMBER (pid
, 0);
3107 #define handle_signal(NAME, VALUE) \
3108 else if (!strcmp (name, NAME)) \
3109 XSETINT (sigcode, VALUE)
3111 if (INTEGERP (sigcode
))
3115 unsigned char *name
;
3117 CHECK_SYMBOL (sigcode
, 1);
3118 name
= XSYMBOL (sigcode
)->name
->data
;
3123 handle_signal ("SIGHUP", SIGHUP
);
3126 handle_signal ("SIGINT", SIGINT
);
3129 handle_signal ("SIGQUIT", SIGQUIT
);
3132 handle_signal ("SIGILL", SIGILL
);
3135 handle_signal ("SIGABRT", SIGABRT
);
3138 handle_signal ("SIGEMT", SIGEMT
);
3141 handle_signal ("SIGKILL", SIGKILL
);
3144 handle_signal ("SIGFPE", SIGFPE
);
3147 handle_signal ("SIGBUS", SIGBUS
);
3150 handle_signal ("SIGSEGV", SIGSEGV
);
3153 handle_signal ("SIGSYS", SIGSYS
);
3156 handle_signal ("SIGPIPE", SIGPIPE
);
3159 handle_signal ("SIGALRM", SIGALRM
);
3162 handle_signal ("SIGTERM", SIGTERM
);
3165 handle_signal ("SIGURG", SIGURG
);
3168 handle_signal ("SIGSTOP", SIGSTOP
);
3171 handle_signal ("SIGTSTP", SIGTSTP
);
3174 handle_signal ("SIGCONT", SIGCONT
);
3177 handle_signal ("SIGCHLD", SIGCHLD
);
3180 handle_signal ("SIGTTIN", SIGTTIN
);
3183 handle_signal ("SIGTTOU", SIGTTOU
);
3186 handle_signal ("SIGIO", SIGIO
);
3189 handle_signal ("SIGXCPU", SIGXCPU
);
3192 handle_signal ("SIGXFSZ", SIGXFSZ
);
3195 handle_signal ("SIGVTALRM", SIGVTALRM
);
3198 handle_signal ("SIGPROF", SIGPROF
);
3201 handle_signal ("SIGWINCH", SIGWINCH
);
3204 handle_signal ("SIGINFO", SIGINFO
);
3207 handle_signal ("SIGUSR1", SIGUSR1
);
3210 handle_signal ("SIGUSR2", SIGUSR2
);
3213 error ("Undefined signal name %s", name
);
3216 #undef handle_signal
3218 return make_number (kill (XINT (pid
), XINT (sigcode
)));
3221 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
3222 "Make PROCESS see end-of-file in its input.\n\
3223 Eof comes after any text already sent to it.\n\
3224 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3225 nil, indicating the current buffer's process.\n\
3226 If PROCESS is a network connection, or is a process communicating\n\
3227 through a pipe (as opposed to a pty), then you cannot send any more\n\
3228 text to PROCESS after you call this function.")
3230 Lisp_Object process
;
3234 proc
= get_process (process
);
3236 /* Make sure the process is really alive. */
3237 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3238 update_status (XPROCESS (proc
));
3239 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3240 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
3243 send_process (proc
, "\032", 1, Qnil
); /* ^z */
3245 if (!NILP (XPROCESS (proc
)->pty_flag
))
3246 send_process (proc
, "\004", 1, Qnil
);
3249 close (XINT (XPROCESS (proc
)->outfd
));
3250 XSETINT (XPROCESS (proc
)->outfd
, open (NULL_DEVICE
, O_WRONLY
));
3256 /* Kill all processes associated with `buffer'.
3257 If `buffer' is nil, kill all processes */
3259 kill_buffer_processes (buffer
)
3262 Lisp_Object tail
, proc
;
3264 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3266 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3267 if (GC_PROCESSP (proc
)
3268 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
3270 if (NETCONN_P (proc
))
3271 Fdelete_process (proc
);
3272 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
3273 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
3278 /* On receipt of a signal that a child status has changed,
3279 loop asking about children with changed statuses until
3280 the system says there are no more.
3281 All we do is change the status;
3282 we do not run sentinels or print notifications.
3283 That is saved for the next time keyboard input is done,
3284 in order to avoid timing errors. */
3286 /** WARNING: this can be called during garbage collection.
3287 Therefore, it must not be fooled by the presence of mark bits in
3290 /** USG WARNING: Although it is not obvious from the documentation
3291 in signal(2), on a USG system the SIGCLD handler MUST NOT call
3292 signal() before executing at least one wait(), otherwise the handler
3293 will be called again, resulting in an infinite loop. The relevant
3294 portion of the documentation reads "SIGCLD signals will be queued
3295 and the signal-catching function will be continually reentered until
3296 the queue is empty". Invoking signal() causes the kernel to reexamine
3297 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
3300 sigchld_handler (signo
)
3303 int old_errno
= errno
;
3305 register struct Lisp_Process
*p
;
3306 extern EMACS_TIME
*input_available_clear_time
;
3310 sigheld
|= sigbit (SIGCHLD
);
3322 #endif /* no WUNTRACED */
3323 /* Keep trying to get a status until we get a definitive result. */
3327 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
3329 while (pid
<= 0 && errno
== EINTR
);
3333 /* A real failure. We have done all our job, so return. */
3335 /* USG systems forget handlers when they are used;
3336 must reestablish each time */
3338 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
3341 sigheld
&= ~sigbit (SIGCHLD
);
3349 #endif /* no WNOHANG */
3351 /* Find the process that signaled us, and record its status. */
3354 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3356 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3357 p
= XPROCESS (proc
);
3358 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
3363 /* Look for an asynchronous process whose pid hasn't been filled
3366 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3368 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3369 p
= XPROCESS (proc
);
3370 if (INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
3375 /* Change the status of the process that was found. */
3378 union { int i
; WAITTYPE wt
; } u
;
3379 int clear_desc_flag
= 0;
3381 XSETINT (p
->tick
, ++process_tick
);
3383 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
3384 XSETINT (p
->raw_status_high
, u
.i
>> 16);
3386 /* If process has terminated, stop waiting for its output. */
3387 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
3388 && XINT (p
->infd
) >= 0)
3389 clear_desc_flag
= 1;
3391 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
3392 if (clear_desc_flag
)
3394 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
3395 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
3398 /* Tell wait_reading_process_input that it needs to wake up and
3400 if (input_available_clear_time
)
3401 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3404 /* There was no asynchronous process found for that id. Check
3405 if we have a synchronous process. */
3408 synch_process_alive
= 0;
3410 /* Report the status of the synchronous process. */
3412 synch_process_retcode
= WRETCODE (w
);
3413 else if (WIFSIGNALED (w
))
3415 int code
= WTERMSIG (w
);
3421 /* Suppress warning if the table has const char *. */
3422 signame
= (char *) sys_siglist
[code
];
3424 signame
= sys_errlist
[code
];
3428 signame
= "unknown";
3430 synch_process_death
= signame
;
3433 /* Tell wait_reading_process_input that it needs to wake up and
3435 if (input_available_clear_time
)
3436 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3439 /* On some systems, we must return right away.
3440 If any more processes want to signal us, we will
3442 Otherwise (on systems that have WNOHANG), loop around
3443 to use up all the processes that have something to tell us. */
3444 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT)
3446 signal (signo
, sigchld_handler
);
3450 #endif /* USG, but not HPUX with WNOHANG */
3456 exec_sentinel_unwind (data
)
3459 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
3464 exec_sentinel_error_handler (error
)
3467 cmd_error_internal (error
, "error in process sentinel: ");
3469 update_echo_area ();
3470 Fsleep_for (make_number (2), Qnil
);
3474 exec_sentinel (proc
, reason
)
3475 Lisp_Object proc
, reason
;
3477 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
3478 register struct Lisp_Process
*p
= XPROCESS (proc
);
3479 int count
= specpdl_ptr
- specpdl
;
3481 /* No need to gcpro these, because all we do with them later
3482 is test them for EQness, and none of them should be a string. */
3483 odeactivate
= Vdeactivate_mark
;
3484 XSETBUFFER (obuffer
, current_buffer
);
3485 okeymap
= current_buffer
->keymap
;
3487 sentinel
= p
->sentinel
;
3488 if (NILP (sentinel
))
3491 /* Zilch the sentinel while it's running, to avoid recursive invocations;
3492 assure that it gets restored no matter how the sentinel exits. */
3494 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
3495 /* Inhibit quit so that random quits don't screw up a running filter. */
3496 specbind (Qinhibit_quit
, Qt
);
3497 specbind (Qlast_nonmenu_event
, Qt
);
3499 running_asynch_code
= 1;
3500 internal_condition_case_1 (read_process_output_call
,
3502 Fcons (proc
, Fcons (reason
, Qnil
))),
3503 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
3504 exec_sentinel_error_handler
);
3505 running_asynch_code
= 0;
3506 restore_match_data ();
3508 Vdeactivate_mark
= odeactivate
;
3510 if (! EQ (Fcurrent_buffer (), obuffer
)
3511 || ! EQ (current_buffer
->keymap
, okeymap
))
3513 /* But do it only if the caller is actually going to read events.
3514 Otherwise there's no need to make him wake up, and it could
3515 cause trouble (for example it would make Fsit_for return). */
3516 if (waiting_for_user_input_p
== -1)
3517 record_asynch_buffer_change ();
3519 unbind_to (count
, Qnil
);
3522 /* Report all recent events of a change in process status
3523 (either run the sentinel or output a message).
3524 This is done while Emacs is waiting for keyboard input. */
3528 register Lisp_Object proc
, buffer
;
3529 Lisp_Object tail
, msg
;
3530 struct gcpro gcpro1
, gcpro2
;
3534 /* We need to gcpro tail; if read_process_output calls a filter
3535 which deletes a process and removes the cons to which tail points
3536 from Vprocess_alist, and then causes a GC, tail is an unprotected
3540 /* Set this now, so that if new processes are created by sentinels
3541 that we run, we get called again to handle their status changes. */
3542 update_tick
= process_tick
;
3544 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
3547 register struct Lisp_Process
*p
;
3549 proc
= Fcdr (Fcar (tail
));
3550 p
= XPROCESS (proc
);
3552 if (XINT (p
->tick
) != XINT (p
->update_tick
))
3554 XSETINT (p
->update_tick
, XINT (p
->tick
));
3556 /* If process is still active, read any output that remains. */
3557 if (XINT (p
->infd
) >= 0)
3558 while (! EQ (p
->filter
, Qt
)
3559 && read_process_output (proc
, XINT (p
->infd
)) > 0);
3563 /* Get the text to use for the message. */
3564 if (!NILP (p
->raw_status_low
))
3566 msg
= status_message (p
->status
);
3568 /* If process is terminated, deactivate it or delete it. */
3570 if (CONSP (p
->status
))
3571 symbol
= XCONS (p
->status
)->car
;
3573 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
3574 || EQ (symbol
, Qclosed
))
3576 if (delete_exited_processes
)
3577 remove_process (proc
);
3579 deactivate_process (proc
);
3582 /* Now output the message suitably. */
3583 if (!NILP (p
->sentinel
))
3584 exec_sentinel (proc
, msg
);
3585 /* Don't bother with a message in the buffer
3586 when a process becomes runnable. */
3587 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
3589 Lisp_Object ro
, tem
;
3590 struct buffer
*old
= current_buffer
;
3593 ro
= XBUFFER (buffer
)->read_only
;
3595 /* Avoid error if buffer is deleted
3596 (probably that's why the process is dead, too) */
3597 if (NILP (XBUFFER (buffer
)->name
))
3599 Fset_buffer (buffer
);
3601 /* Insert new output into buffer
3602 at the current end-of-output marker,
3603 thus preserving logical ordering of input and output. */
3604 if (XMARKER (p
->mark
)->buffer
)
3605 SET_PT (marker_position (p
->mark
));
3608 if (point
<= opoint
)
3609 opoint
+= XSTRING (msg
)->size
+ XSTRING (p
->name
)->size
+ 10;
3611 tem
= current_buffer
->read_only
;
3612 current_buffer
->read_only
= Qnil
;
3613 insert_string ("\nProcess ");
3614 Finsert (1, &p
->name
);
3615 insert_string (" ");
3617 current_buffer
->read_only
= tem
;
3618 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
3621 set_buffer_internal (old
);
3626 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
3627 redisplay_preserve_echo_area ();
3632 /* The first time this is called, assume keyboard input comes from DESC
3633 instead of from where we used to expect it.
3634 Subsequent calls mean assume input keyboard can come from DESC
3635 in addition to other places. */
3637 static int add_keyboard_wait_descriptor_called_flag
;
3640 add_keyboard_wait_descriptor (desc
)
3643 if (! add_keyboard_wait_descriptor_called_flag
)
3644 FD_CLR (0, &input_wait_mask
);
3645 add_keyboard_wait_descriptor_called_flag
= 1;
3646 FD_SET (desc
, &input_wait_mask
);
3647 if (desc
> max_keyboard_desc
)
3648 max_keyboard_desc
= desc
;
3651 /* From now on, do not expect DESC to give keyboard input. */
3654 delete_keyboard_wait_descriptor (desc
)
3658 int lim
= max_keyboard_desc
;
3660 FD_CLR (desc
, &input_wait_mask
);
3662 if (desc
== max_keyboard_desc
)
3663 for (fd
= 0; fd
< lim
; fd
++)
3664 if (FD_ISSET (fd
, &input_wait_mask
)
3665 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3666 max_keyboard_desc
= fd
;
3669 /* Return nonzero if *MASK has a bit set
3670 that corresponds to one of the keyboard input descriptors. */
3673 keyboard_bit_set (mask
)
3678 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
3679 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
3680 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3692 if (! noninteractive
|| initialized
)
3694 signal (SIGCHLD
, sigchld_handler
);
3697 FD_ZERO (&input_wait_mask
);
3698 FD_ZERO (&non_keyboard_wait_mask
);
3699 max_process_desc
= 0;
3701 FD_SET (0, &input_wait_mask
);
3703 Vprocess_alist
= Qnil
;
3704 for (i
= 0; i
< MAXDESC
; i
++)
3706 chan_process
[i
] = Qnil
;
3707 proc_buffered_char
[i
] = -1;
3714 stream_process
= intern ("stream");
3716 Qprocessp
= intern ("processp");
3717 staticpro (&Qprocessp
);
3718 Qrun
= intern ("run");
3720 Qstop
= intern ("stop");
3722 Qsignal
= intern ("signal");
3723 staticpro (&Qsignal
);
3725 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
3728 Qexit = intern ("exit");
3729 staticpro (&Qexit); */
3731 Qopen
= intern ("open");
3733 Qclosed
= intern ("closed");
3734 staticpro (&Qclosed
);
3736 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
3737 staticpro (&Qlast_nonmenu_event
);
3739 staticpro (&Vprocess_alist
);
3741 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
3742 "*Non-nil means delete processes immediately when they exit.\n\
3743 nil means don't delete them until `list-processes' is run.");
3745 delete_exited_processes
= 1;
3747 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
3748 "Control type of device used to communicate with subprocesses.\n\
3749 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
3750 The value has no effect if the system has no ptys or if all ptys are busy:\n\
3751 then a pipe is used in any case.\n\
3752 The value takes effect when `start-process' is called.");
3753 Vprocess_connection_type
= Qt
;
3755 defsubr (&Sprocessp
);
3756 defsubr (&Sget_process
);
3757 defsubr (&Sget_buffer_process
);
3758 defsubr (&Sdelete_process
);
3759 defsubr (&Sprocess_status
);
3760 defsubr (&Sprocess_exit_status
);
3761 defsubr (&Sprocess_id
);
3762 defsubr (&Sprocess_name
);
3763 defsubr (&Sprocess_tty_name
);
3764 defsubr (&Sprocess_command
);
3765 defsubr (&Sset_process_buffer
);
3766 defsubr (&Sprocess_buffer
);
3767 defsubr (&Sprocess_mark
);
3768 defsubr (&Sset_process_filter
);
3769 defsubr (&Sprocess_filter
);
3770 defsubr (&Sset_process_sentinel
);
3771 defsubr (&Sset_process_window_size
);
3772 defsubr (&Sprocess_sentinel
);
3773 defsubr (&Sprocess_kill_without_query
);
3774 defsubr (&Slist_processes
);
3775 defsubr (&Sprocess_list
);
3776 defsubr (&Sstart_process
);
3778 defsubr (&Sopen_network_stream
);
3779 #endif /* HAVE_SOCKETS */
3780 defsubr (&Saccept_process_output
);
3781 defsubr (&Sprocess_send_region
);
3782 defsubr (&Sprocess_send_string
);
3783 defsubr (&Sinterrupt_process
);
3784 defsubr (&Skill_process
);
3785 defsubr (&Squit_process
);
3786 defsubr (&Sstop_process
);
3787 defsubr (&Scontinue_process
);
3788 defsubr (&Sprocess_send_eof
);
3789 defsubr (&Ssignal_process
);
3790 defsubr (&Swaiting_for_user_input_p
);
3791 /* defsubr (&Sprocess_connection); */
3795 #else /* not subprocesses */
3797 #include <sys/types.h>
3801 #include "systime.h"
3802 #include "termopts.h"
3803 #include "sysselect.h"
3805 extern int frame_garbaged
;
3807 extern EMACS_TIME
timer_check ();
3808 extern int timers_run
;
3810 /* As described above, except assuming that there are no subprocesses:
3812 Wait for timeout to elapse and/or keyboard input to be available.
3815 timeout in seconds, or
3816 zero for no limit, or
3817 -1 means gobble data immediately available but don't wait for any.
3819 read_kbd is a Lisp_Object:
3820 0 to ignore keyboard input, or
3821 1 to return when input is available, or
3822 -1 means caller will actually read the input, so don't throw to
3824 a cons cell, meaning wait until its car is non-nil
3825 (and gobble terminal input into the buffer if any arrives), or
3826 We know that read_kbd will never be a Lisp_Process, since
3827 `subprocesses' isn't defined.
3829 do_display != 0 means redisplay should be done to show subprocess
3830 output that arrives.
3832 Return true iff we received input from any process. */
3835 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
3836 int time_limit
, microsecs
;
3837 Lisp_Object read_kbd
;
3840 EMACS_TIME end_time
, timeout
;
3841 SELECT_TYPE waitchannels
;
3843 Lisp_Object
*wait_for_cell
= 0;
3845 /* If waiting for non-nil in a cell, record where. */
3846 if (CONSP (read_kbd
))
3848 wait_for_cell
= &XCONS (read_kbd
)->car
;
3849 XSETFASTINT (read_kbd
, 0);
3852 /* What does time_limit really mean? */
3853 if (time_limit
|| microsecs
)
3855 if (time_limit
== -1)
3856 /* In fact, it's zero. */
3857 EMACS_SET_SECS_USECS (timeout
, 0, 0);
3859 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
3861 /* How far in the future is that? */
3862 EMACS_GET_TIME (end_time
);
3863 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
3866 /* It's infinite. */
3867 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
3869 /* Turn off periodic alarms (in case they are in use)
3870 because the select emulator uses alarms. */
3876 int timeout_reduced_for_timers
= 0;
3878 /* If calling from keyboard input, do not quit
3879 since we want to return C-g as an input character.
3880 Otherwise, do pending quit if requested. */
3881 if (XINT (read_kbd
) >= 0)
3884 /* Exit now if the cell we're waiting for became non-nil. */
3885 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
3888 /* Compute time from now till when time limit is up */
3889 /* Exit if already run out */
3890 if (time_limit
> 0 || microsecs
)
3892 EMACS_GET_TIME (timeout
);
3893 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
3894 if (EMACS_TIME_NEG_P (timeout
))
3898 /* If our caller will not immediately handle keyboard events,
3899 run timer events directly.
3900 (Callers that will immediately read keyboard events
3901 call timer_delay on their own.) */
3902 if (! wait_for_cell
)
3904 EMACS_TIME timer_delay
;
3908 old_timers_run
= timers_run
;
3909 timer_delay
= timer_check (1);
3910 if (timers_run
!= old_timers_run
&& do_display
)
3912 redisplay_preserve_echo_area ();
3913 /* We must retry, since a timer may have requeued itself
3914 and that could alter the time delay. */
3918 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
3920 EMACS_TIME difference
;
3921 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
3922 if (EMACS_TIME_NEG_P (difference
))
3924 timeout
= timer_delay
;
3925 timeout_reduced_for_timers
= 1;
3930 /* Cause C-g and alarm signals to take immediate action,
3931 and cause input available signals to zero out timeout. */
3932 if (XINT (read_kbd
) < 0)
3933 set_waiting_for_input (&timeout
);
3935 /* Wait till there is something to do. */
3937 if (! XINT (read_kbd
) && wait_for_cell
== 0)
3938 FD_ZERO (&waitchannels
);
3940 FD_SET (0, &waitchannels
);
3942 /* If a frame has been newly mapped and needs updating,
3943 reprocess its display stuff. */
3944 if (frame_garbaged
&& do_display
)
3946 clear_waiting_for_input ();
3947 redisplay_preserve_echo_area ();
3948 if (XINT (read_kbd
) < 0)
3949 set_waiting_for_input (&timeout
);
3952 if (XINT (read_kbd
) && detect_input_pending ())
3955 FD_ZERO (&waitchannels
);
3958 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
3963 /* Make C-g and alarm signals set flags again */
3964 clear_waiting_for_input ();
3966 /* If we woke up due to SIGWINCH, actually change size now. */
3967 do_pending_window_change ();
3969 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
3970 /* We waited the full specified time, so return now. */
3975 /* If the system call was interrupted, then go around the
3977 if (xerrno
== EINTR
)
3978 FD_ZERO (&waitchannels
);
3980 error ("select error: %s", strerror (xerrno
));
3983 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
3984 /* System sometimes fails to deliver SIGIO. */
3985 kill (getpid (), SIGIO
);
3988 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
3989 kill (getpid (), SIGIO
);
3992 /* Check for keyboard input */
3994 if ((XINT (read_kbd
) != 0)
3995 && detect_input_pending_run_timers (do_display
))
3997 swallow_events (do_display
);
3998 if (detect_input_pending_run_timers (do_display
))
4002 /* If wait_for_cell. check for keyboard input
4003 but don't run any timers.
4004 ??? (It seems wrong to me to check for keyboard
4005 input at all when wait_for_cell, but the code
4006 has been this way since July 1994.
4007 Try changing this after version 19.31.) */
4009 && detect_input_pending ())
4011 swallow_events (do_display
);
4012 if (detect_input_pending ())
4016 /* Exit now if the cell we're waiting for became non-nil. */
4017 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
4027 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
4028 /* Don't confuse make-docfile by having two doc strings for this function.
4029 make-docfile does not pay attention to #if, for good reason! */
4032 register Lisp_Object name
;
4037 /* Kill all processes associated with `buffer'.
4038 If `buffer' is nil, kill all processes.
4039 Since we have no subprocesses, this does nothing. */
4041 kill_buffer_processes (buffer
)
4052 defsubr (&Sget_buffer_process
);
4056 #endif /* not subprocesses */