1 /* Asynchronous subprocess control for GNU Emacs.
2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
6 GNU Emacs is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU Emacs is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU Emacs; see the file COPYING. If not, write to
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
25 /* This file is split into two parts by the following preprocessor
26 conditional. The 'then' clause contains all of the support for
27 asynchronous subprocesses. The 'else' clause contains stub
28 versions of some of the asynchronous subprocess routines that are
29 often called elsewhere in Emacs, so we don't have to #ifdef the
30 sections that call them. */
38 #include <sys/types.h> /* some typedefs are used in sys/file.h */
48 #endif /* not WINDOWSNT */
50 #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */
51 #include <sys/socket.h>
53 #include <netinet/in.h>
54 #include <arpa/inet.h>
55 #endif /* HAVE_SOCKETS */
57 /* TERM is a poor-man's SLIP, used on Linux. */
62 /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */
63 #ifdef HAVE_BROKEN_INET_ADDR
64 #define IN_ADDR struct in_addr
65 #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1)
67 #define IN_ADDR unsigned long
68 #define NUMERIC_ADDR_ERROR (numeric_addr == -1)
71 #if defined(BSD) || defined(STRIDE)
72 #include <sys/ioctl.h>
73 #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5)
75 #endif /* HAVE_PTYS and no O_NDELAY */
76 #endif /* BSD or STRIDE */
78 #ifdef BROKEN_O_NONBLOCK
80 #endif /* BROKEN_O_NONBLOCK */
87 #include <sys/sysmacros.h> /* for "minor" */
97 #include "termhooks.h"
102 Lisp_Object Qprocessp
;
103 Lisp_Object Qrun
, Qstop
, Qsignal
, Qopen
, Qclosed
;
104 Lisp_Object Qlast_nonmenu_event
;
105 /* Qexit is declared and initialized in eval.c. */
107 /* a process object is a network connection when its childp field is neither
108 Qt nor Qnil but is instead a string (name of foreign host we
109 are connected to + name of port we are connected to) */
112 static Lisp_Object stream_process
;
114 #define NETCONN_P(p) (GC_STRINGP (XPROCESS (p)->childp))
116 #define NETCONN_P(p) 0
117 #endif /* HAVE_SOCKETS */
119 /* Define first descriptor number available for subprocesses. */
121 #define FIRST_PROC_DESC 1
123 #define FIRST_PROC_DESC 3
126 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
129 #if !defined (SIGCHLD) && defined (SIGCLD)
130 #define SIGCHLD SIGCLD
133 #include "syssignal.h"
138 extern char *strerror ();
140 extern char *sys_errlist
[];
147 #ifndef SYS_SIGLIST_DECLARED
152 extern char *sys_siglist
[];
153 #endif /* not LINUX */
155 char *sys_siglist
[] =
161 "illegal instruction",
165 "floating point exception",
168 "segmentation violation",
169 "bad argument to system call",
170 "write on a pipe with no one to read it",
172 "software termination signal from kill",
174 "sendable stop signal not from tty",
175 "stop signal from tty",
176 "continue a stopped process",
177 "child status has changed",
178 "background read attempted from control tty",
179 "background write attempted from control tty",
180 "input record available at control tty",
181 "exceeded CPU time limit",
182 "exceeded file size limit"
184 #endif /* not WINDOWSNT */
187 #endif /* ! SYS_SIGLIST_DECLARED */
189 /* t means use pty, nil means use a pipe,
190 maybe other values to come. */
191 static Lisp_Object Vprocess_connection_type
;
195 #include <sys/socket.h>
199 /* These next two vars are non-static since sysdep.c uses them in the
200 emulation of `select'. */
201 /* Number of events of change of status of a process. */
203 /* Number of events for which the user or sentinel has been notified. */
206 #include "sysselect.h"
208 /* If we support X Windows, turn on the code to poll periodically
209 to detect C-g. It isn't actually used when doing interrupt input. */
210 #ifdef HAVE_X_WINDOWS
211 #define POLL_FOR_INPUT
214 /* Mask of bits indicating the descriptors that we wait for input on. */
216 static SELECT_TYPE input_wait_mask
;
218 /* Mask that excludes keyboard input descriptor (s). */
220 static SELECT_TYPE non_keyboard_wait_mask
;
222 /* The largest descriptor currently in use for a process object. */
223 static int max_process_desc
;
225 /* The largest descriptor currently in use for keyboard input. */
226 static int max_keyboard_desc
;
228 /* Nonzero means delete a process right away if it exits. */
229 static int delete_exited_processes
;
231 /* Indexed by descriptor, gives the process (if any) for that descriptor */
232 Lisp_Object chan_process
[MAXDESC
];
234 /* Alist of elements (NAME . PROCESS) */
235 Lisp_Object Vprocess_alist
;
237 /* Buffered-ahead input char from process, indexed by channel.
238 -1 means empty (no char is buffered).
239 Used on sys V where the only way to tell if there is any
240 output from the process is to read at least one char.
241 Always -1 on systems that support FIONREAD. */
243 /* Don't make static; need to access externally. */
244 int proc_buffered_char
[MAXDESC
];
246 static Lisp_Object
get_process ();
248 /* Maximum number of bytes to send to a pty without an eof. */
249 static int pty_max_bytes
;
252 /* The file name of the pty opened by allocate_pty. */
254 static char pty_name
[24];
257 /* Compute the Lisp form of the process status, p->status, from
258 the numeric status that was returned by `wait'. */
260 Lisp_Object
status_convert ();
263 struct Lisp_Process
*p
;
265 union { int i
; WAITTYPE wt
; } u
;
266 u
.i
= XFASTINT (p
->raw_status_low
) + (XFASTINT (p
->raw_status_high
) << 16);
267 p
->status
= status_convert (u
.wt
);
268 p
->raw_status_low
= Qnil
;
269 p
->raw_status_high
= Qnil
;
272 /* Convert a process status word in Unix format to
273 the list that we use internally. */
280 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
281 else if (WIFEXITED (w
))
282 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
283 WCOREDUMP (w
) ? Qt
: Qnil
));
284 else if (WIFSIGNALED (w
))
285 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
286 WCOREDUMP (w
) ? Qt
: Qnil
));
291 /* Given a status-list, extract the three pieces of information
292 and store them individually through the three pointers. */
295 decode_status (l
, symbol
, code
, coredump
)
311 *symbol
= XCONS (l
)->car
;
312 tem
= XCONS (l
)->cdr
;
313 *code
= XFASTINT (XCONS (tem
)->car
);
314 tem
= XCONS (tem
)->cdr
;
315 *coredump
= !NILP (tem
);
319 /* Return a string describing a process status list. */
322 status_message (status
)
327 Lisp_Object string
, string2
;
329 decode_status (status
, &symbol
, &code
, &coredump
);
331 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
337 /* Cast to suppress warning if the table has const char *. */
338 signame
= (char *) sys_siglist
[code
];
340 signame
= sys_errlist
[code
];
345 string
= build_string (signame
);
346 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
347 XSTRING (string
)->data
[0] = DOWNCASE (XSTRING (string
)->data
[0]);
348 return concat2 (string
, string2
);
350 else if (EQ (symbol
, Qexit
))
353 return build_string ("finished\n");
354 string
= Fnumber_to_string (make_number (code
));
355 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
356 return concat2 (build_string ("exited abnormally with code "),
357 concat2 (string
, string2
));
360 return Fcopy_sequence (Fsymbol_name (symbol
));
365 /* Open an available pty, returning a file descriptor.
366 Return -1 on failure.
367 The file name of the terminal corresponding to the pty
368 is left in the variable pty_name. */
377 /* Some systems name their pseudoterminals so that there are gaps in
378 the usual sequence - for example, on HP9000/S700 systems, there
379 are no pseudoterminals with names ending in 'f'. So we wait for
380 three failures in a row before deciding that we've reached the
382 int failed_count
= 0;
387 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
388 for (i
= 0; i
< 16; i
++)
391 #ifdef PTY_NAME_SPRINTF
394 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
395 #endif /* no PTY_NAME_SPRINTF */
399 #else /* no PTY_OPEN */
401 /* Unusual IRIS code */
402 *ptyv
= open ("/dev/ptc", O_RDWR
| O_NDELAY
, 0);
405 if (fstat (fd
, &stb
) < 0)
408 if (stat (pty_name
, &stb
) < 0)
411 if (failed_count
>= 3)
417 fd
= open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
419 fd
= open (pty_name
, O_RDWR
| O_NDELAY
, 0);
421 #endif /* not IRIS */
422 #endif /* no PTY_OPEN */
426 /* check to make certain that both sides are available
427 this avoids a nasty yet stupid bug in rlogins */
428 #ifdef PTY_TTY_NAME_SPRINTF
431 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
432 #endif /* no PTY_TTY_NAME_SPRINTF */
434 if (access (pty_name
, 6) != 0)
437 #if !defined(IRIS) && !defined(__sgi)
443 #endif /* not UNIPLUS */
450 #endif /* HAVE_PTYS */
456 struct Lisp_Vector
*vec
;
457 register Lisp_Object val
, tem
, name1
;
458 register struct Lisp_Process
*p
;
462 vec
= allocate_vectorlike ((EMACS_INT
) VECSIZE (struct Lisp_Process
));
463 for (i
= 0; i
< VECSIZE (struct Lisp_Process
); i
++)
464 vec
->contents
[i
] = Qnil
;
465 vec
->size
= VECSIZE (struct Lisp_Process
);
466 p
= (struct Lisp_Process
*)vec
;
468 XSETINT (p
->infd
, -1);
469 XSETINT (p
->outfd
, -1);
470 XSETFASTINT (p
->pid
, 0);
471 XSETFASTINT (p
->tick
, 0);
472 XSETFASTINT (p
->update_tick
, 0);
473 p
->raw_status_low
= Qnil
;
474 p
->raw_status_high
= Qnil
;
476 p
->mark
= Fmake_marker ();
478 /* If name is already in use, modify it until it is unused. */
483 tem
= Fget_process (name1
);
484 if (NILP (tem
)) break;
485 sprintf (suffix
, "<%d>", i
);
486 name1
= concat2 (name
, build_string (suffix
));
490 XSETPROCESS (val
, p
);
491 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
495 remove_process (proc
)
496 register Lisp_Object proc
;
498 register Lisp_Object pair
;
500 pair
= Frassq (proc
, Vprocess_alist
);
501 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
502 Fset_marker (XPROCESS (proc
)->mark
, Qnil
, Qnil
);
504 deactivate_process (proc
);
507 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
508 "Return t if OBJECT is a process.")
512 return PROCESSP (obj
) ? Qt
: Qnil
;
515 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
516 "Return the process named NAME, or nil if there is none.")
518 register Lisp_Object name
;
522 CHECK_STRING (name
, 0);
523 return Fcdr (Fassoc (name
, Vprocess_alist
));
526 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
527 "Return the (or, a) process associated with BUFFER.\n\
528 BUFFER may be a buffer or the name of one.")
530 register Lisp_Object name
;
532 register Lisp_Object buf
, tail
, proc
;
534 if (NILP (name
)) return Qnil
;
535 buf
= Fget_buffer (name
);
536 if (NILP (buf
)) return Qnil
;
538 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
540 proc
= Fcdr (Fcar (tail
));
541 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
547 /* This is how commands for the user decode process arguments. It
548 accepts a process, a process name, a buffer, a buffer name, or nil.
549 Buffers denote the first process in the buffer, and nil denotes the
554 register Lisp_Object name
;
556 register Lisp_Object proc
, obj
;
559 obj
= Fget_process (name
);
561 obj
= Fget_buffer (name
);
563 error ("Process %s does not exist", XSTRING (name
)->data
);
565 else if (NILP (name
))
566 obj
= Fcurrent_buffer ();
570 /* Now obj should be either a buffer object or a process object.
574 proc
= Fget_buffer_process (obj
);
576 error ("Buffer %s has no process", XSTRING (XBUFFER (obj
)->name
)->data
);
580 CHECK_PROCESS (obj
, 0);
586 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
587 "Delete PROCESS: kill it and forget about it immediately.\n\
588 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
589 nil, indicating the current buffer's process.")
591 register Lisp_Object proc
;
593 proc
= get_process (proc
);
594 XPROCESS (proc
)->raw_status_low
= Qnil
;
595 XPROCESS (proc
)->raw_status_high
= Qnil
;
596 if (NETCONN_P (proc
))
598 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
599 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
601 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
603 Fkill_process (proc
, Qnil
);
604 /* Do this now, since remove_process will make sigchld_handler do nothing. */
605 XPROCESS (proc
)->status
606 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
607 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
610 remove_process (proc
);
614 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
615 "Return the status of PROCESS: a symbol, one of these:\n\
616 run -- for a process that is running.\n\
617 stop -- for a process stopped but continuable.\n\
618 exit -- for a process that has exited.\n\
619 signal -- for a process that has got a fatal signal.\n\
620 open -- for a network stream connection that is open.\n\
621 closed -- for a network stream connection that is closed.\n\
622 nil -- if arg is a process name and no such process exists.\n\
623 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
624 nil, indicating the current buffer's process.")
626 register Lisp_Object proc
;
628 register struct Lisp_Process
*p
;
629 register Lisp_Object status
;
632 proc
= Fget_process (proc
);
634 proc
= get_process (proc
);
640 if (!NILP (p
->raw_status_low
))
644 status
= XCONS (status
)->car
;
645 if (NETCONN_P (proc
))
647 if (EQ (status
, Qrun
))
649 else if (EQ (status
, Qexit
))
655 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
657 "Return the exit status of PROCESS or the signal number that killed it.\n\
658 If PROCESS has not yet exited or died, return 0.")
660 register Lisp_Object proc
;
662 CHECK_PROCESS (proc
, 0);
663 if (!NILP (XPROCESS (proc
)->raw_status_low
))
664 update_status (XPROCESS (proc
));
665 if (CONSP (XPROCESS (proc
)->status
))
666 return XCONS (XCONS (XPROCESS (proc
)->status
)->cdr
)->car
;
667 return make_number (0);
670 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
671 "Return the process id of PROCESS.\n\
672 This is the pid of the Unix process which PROCESS uses or talks to.\n\
673 For a network connection, this value is nil.")
675 register Lisp_Object proc
;
677 CHECK_PROCESS (proc
, 0);
678 return XPROCESS (proc
)->pid
;
681 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
682 "Return the name of PROCESS, as a string.\n\
683 This is the name of the program invoked in PROCESS,\n\
684 possibly modified to make it unique among process names.")
686 register Lisp_Object proc
;
688 CHECK_PROCESS (proc
, 0);
689 return XPROCESS (proc
)->name
;
692 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
693 "Return the command that was executed to start PROCESS.\n\
694 This is a list of strings, the first string being the program executed\n\
695 and the rest of the strings being the arguments given to it.\n\
696 For a non-child channel, this is nil.")
698 register Lisp_Object proc
;
700 CHECK_PROCESS (proc
, 0);
701 return XPROCESS (proc
)->command
;
704 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
705 "Return the name of the terminal PROCESS uses, or nil if none.\n\
706 This is the terminal that the process itself reads and writes on,\n\
707 not the name of the pty that Emacs uses to talk with that terminal.")
709 register Lisp_Object proc
;
711 CHECK_PROCESS (proc
, 0);
712 return XPROCESS (proc
)->tty_name
;
715 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
717 "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).")
719 register Lisp_Object proc
, buffer
;
721 CHECK_PROCESS (proc
, 0);
723 CHECK_BUFFER (buffer
, 1);
724 XPROCESS (proc
)->buffer
= buffer
;
728 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
730 "Return the buffer PROCESS is associated with.\n\
731 Output from PROCESS is inserted in this buffer\n\
732 unless PROCESS has a filter.")
734 register Lisp_Object proc
;
736 CHECK_PROCESS (proc
, 0);
737 return XPROCESS (proc
)->buffer
;
740 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
742 "Return the marker for the end of the last output from PROCESS.")
744 register Lisp_Object proc
;
746 CHECK_PROCESS (proc
, 0);
747 return XPROCESS (proc
)->mark
;
750 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
752 "Give PROCESS the filter function FILTER; nil means no filter.\n\
753 t means stop accepting output from the process.\n\
754 When a process has a filter, each time it does output\n\
755 the entire string of output is passed to the filter.\n\
756 The filter gets two arguments: the process and the string of output.\n\
757 If the process has a filter, its buffer is not used for output.")
759 register Lisp_Object proc
, filter
;
761 CHECK_PROCESS (proc
, 0);
764 FD_CLR (XINT (XPROCESS (proc
)->infd
), &input_wait_mask
);
765 FD_CLR (XINT (XPROCESS (proc
)->infd
), &non_keyboard_wait_mask
);
767 else if (EQ (XPROCESS (proc
)->filter
, Qt
))
769 FD_SET (XINT (XPROCESS (proc
)->infd
), &input_wait_mask
);
770 FD_SET (XINT (XPROCESS (proc
)->infd
), &non_keyboard_wait_mask
);
772 XPROCESS (proc
)->filter
= filter
;
776 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
778 "Returns the filter function of PROCESS; nil if none.\n\
779 See `set-process-filter' for more info on filter functions.")
781 register Lisp_Object proc
;
783 CHECK_PROCESS (proc
, 0);
784 return XPROCESS (proc
)->filter
;
787 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
789 "Give PROCESS the sentinel SENTINEL; nil for none.\n\
790 The sentinel is called as a function when the process changes state.\n\
791 It gets two arguments: the process, and a string describing the change.")
793 register Lisp_Object proc
, sentinel
;
795 CHECK_PROCESS (proc
, 0);
796 XPROCESS (proc
)->sentinel
= sentinel
;
800 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
802 "Return the sentinel of PROCESS; nil if none.\n\
803 See `set-process-sentinel' for more info on sentinels.")
805 register Lisp_Object proc
;
807 CHECK_PROCESS (proc
, 0);
808 return XPROCESS (proc
)->sentinel
;
811 DEFUN ("set-process-window-size", Fset_process_window_size
,
812 Sset_process_window_size
, 3, 3, 0,
813 "Tell PROCESS that it has logical window size HEIGHT and WIDTH.")
814 (proc
, height
, width
)
815 register Lisp_Object proc
, height
, width
;
817 CHECK_PROCESS (proc
, 0);
818 CHECK_NATNUM (height
, 0);
819 CHECK_NATNUM (width
, 0);
820 if (set_window_size (XINT (XPROCESS (proc
)->infd
),
821 XINT (height
), XINT(width
)) <= 0)
827 DEFUN ("process-kill-without-query", Fprocess_kill_without_query
,
828 Sprocess_kill_without_query
, 1, 2, 0,
829 "Say no query needed if PROCESS is running when Emacs is exited.\n\
830 Optional second argument if non-nil says to require a query.\n\
831 Value is t if a query was formerly required.")
833 register Lisp_Object proc
, value
;
837 CHECK_PROCESS (proc
, 0);
838 tem
= XPROCESS (proc
)->kill_without_query
;
839 XPROCESS (proc
)->kill_without_query
= Fnull (value
);
844 #if 0 /* Turned off because we don't currently record this info
845 in the process. Perhaps add it. */
846 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
847 "Return the connection type of `PROCESS'.\n\
848 The value is `nil' for a pipe,\n\
849 `t' or `pty' for a pty, or `stream' for a socket connection.")
853 return XPROCESS (process
)->type
;
860 register Lisp_Object tail
, tem
;
861 Lisp_Object proc
, minspace
, tem1
;
862 register struct buffer
*old
= current_buffer
;
863 register struct Lisp_Process
*p
;
867 XSETFASTINT (minspace
, 1);
869 set_buffer_internal (XBUFFER (Vstandard_output
));
870 Fbuffer_disable_undo (Vstandard_output
);
872 current_buffer
->truncate_lines
= Qt
;
875 Proc Status Buffer Tty Command\n\
876 ---- ------ ------ --- -------\n", -1);
878 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
882 proc
= Fcdr (Fcar (tail
));
884 if (NILP (p
->childp
))
887 Finsert (1, &p
->name
);
888 Findent_to (make_number (13), minspace
);
890 if (!NILP (p
->raw_status_low
))
893 if (CONSP (p
->status
))
894 symbol
= XCONS (p
->status
)->car
;
897 if (EQ (symbol
, Qsignal
))
900 tem
= Fcar (Fcdr (p
->status
));
902 if (XINT (tem
) < NSIG
)
903 write_string (sys_errlist
[XINT (tem
)], -1);
906 Fprinc (symbol
, Qnil
);
908 else if (NETCONN_P (proc
))
910 if (EQ (symbol
, Qrun
))
911 write_string ("open", -1);
912 else if (EQ (symbol
, Qexit
))
913 write_string ("closed", -1);
915 Fprinc (symbol
, Qnil
);
918 Fprinc (symbol
, Qnil
);
920 if (EQ (symbol
, Qexit
))
923 tem
= Fcar (Fcdr (p
->status
));
926 sprintf (tembuf
, " %d", (int) XFASTINT (tem
));
927 write_string (tembuf
, -1);
931 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
932 remove_process (proc
);
934 Findent_to (make_number (22), minspace
);
935 if (NILP (p
->buffer
))
936 insert_string ("(none)");
937 else if (NILP (XBUFFER (p
->buffer
)->name
))
938 insert_string ("(Killed)");
940 Finsert (1, &XBUFFER (p
->buffer
)->name
);
942 Findent_to (make_number (37), minspace
);
944 if (STRINGP (p
->tty_name
))
945 Finsert (1, &p
->tty_name
);
947 insert_string ("(none)");
949 Findent_to (make_number (49), minspace
);
951 if (NETCONN_P (proc
))
953 sprintf (tembuf
, "(network stream connection to %s)\n",
954 XSTRING (p
->childp
)->data
);
955 insert_string (tembuf
);
969 insert_string ("\n");
975 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 0, "",
976 "Display a list of all processes.\n\
977 \(Any processes listed as Exited or Signaled are actually eliminated\n\
978 after the listing is made.)")
981 internal_with_output_to_temp_buffer ("*Process List*",
982 list_processes_1
, Qnil
);
986 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
987 "Return a list of all processes.")
990 return Fmapcar (Qcdr
, Vprocess_alist
);
993 /* Starting asynchronous inferior processes. */
995 static Lisp_Object
start_process_unwind ();
997 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
998 "Start a program in a subprocess. Return the process object for it.\n\
999 Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\
1000 NAME is name for process. It is modified if necessary to make it unique.\n\
1001 BUFFER is the buffer or (buffer-name) to associate with the process.\n\
1002 Process output goes at end of that buffer, unless you specify\n\
1003 an output stream or filter function to handle the output.\n\
1004 BUFFER may be also nil, meaning that this process is not associated\n\
1006 Third arg is program file name. It is searched for as in the shell.\n\
1007 Remaining arguments are strings to give program as arguments.")
1010 register Lisp_Object
*args
;
1012 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1014 register unsigned char *new_argv
;
1017 register unsigned char **new_argv
;
1020 int count
= specpdl_ptr
- specpdl
;
1024 buffer
= Fget_buffer_create (buffer
);
1026 /* Make sure that the child will be able to chdir to the current
1027 buffer's current directory, or its unhandled equivalent. We
1028 can't just have the child check for an error when it does the
1029 chdir, since it's in a vfork.
1031 We have to GCPRO around this because Fexpand_file_name and
1032 Funhandled_file_name_directory might call a file name handling
1033 function. The argument list is protected by the caller, so all
1034 we really have to worry about is buffer. */
1036 struct gcpro gcpro1
, gcpro2
;
1038 current_dir
= current_buffer
->directory
;
1040 GCPRO2 (buffer
, current_dir
);
1043 = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir
),
1045 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1046 report_file_error ("Setting current directory",
1047 Fcons (current_buffer
->directory
, Qnil
));
1053 CHECK_STRING (name
, 0);
1057 CHECK_STRING (program
, 2);
1060 /* Make a one member argv with all args concatenated
1061 together separated by a blank. */
1062 len
= XSTRING (program
)->size
+ 2;
1063 for (i
= 3; i
< nargs
; i
++)
1066 CHECK_STRING (tem
, i
);
1067 len
+= XSTRING (tem
)->size
+ 1; /* count the blank */
1069 new_argv
= (unsigned char *) alloca (len
);
1070 strcpy (new_argv
, XSTRING (program
)->data
);
1071 for (i
= 3; i
< nargs
; i
++)
1074 CHECK_STRING (tem
, i
);
1075 strcat (new_argv
, " ");
1076 strcat (new_argv
, XSTRING (tem
)->data
);
1078 /* Need to add code here to check for program existence on VMS */
1081 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1083 program
= Fexpand_file_name (program
, Qnil
);
1085 /* If program file name is not absolute, search our path for it */
1086 if (!IS_DIRECTORY_SEP (XSTRING (program
)->data
[0])
1087 && !(XSTRING (program
)->size
> 1
1088 && IS_DEVICE_SEP (XSTRING (program
)->data
[1])))
1090 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1093 GCPRO4 (name
, program
, buffer
, current_dir
);
1094 openp (Vexec_path
, program
, EXEC_SUFFIXES
, &tem
, 1);
1097 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1098 new_argv
[0] = XSTRING (tem
)->data
;
1102 if (!NILP (Ffile_directory_p (program
)))
1103 error ("Specified program for new process is a directory");
1105 new_argv
[0] = XSTRING (program
)->data
;
1108 for (i
= 3; i
< nargs
; i
++)
1111 CHECK_STRING (tem
, i
);
1112 new_argv
[i
- 2] = XSTRING (tem
)->data
;
1114 new_argv
[i
- 2] = 0;
1115 #endif /* not VMS */
1117 proc
= make_process (name
);
1118 /* If an error occurs and we can't start the process, we want to
1119 remove it from the process list. This means that each error
1120 check in create_process doesn't need to call remove_process
1121 itself; it's all taken care of here. */
1122 record_unwind_protect (start_process_unwind
, proc
);
1124 XPROCESS (proc
)->childp
= Qt
;
1125 XPROCESS (proc
)->command_channel_p
= Qnil
;
1126 XPROCESS (proc
)->buffer
= buffer
;
1127 XPROCESS (proc
)->sentinel
= Qnil
;
1128 XPROCESS (proc
)->filter
= Qnil
;
1129 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1131 /* Make the process marker point into the process buffer (if any). */
1133 Fset_marker (XPROCESS (proc
)->mark
,
1134 make_number (BUF_ZV (XBUFFER (buffer
))), buffer
);
1136 create_process (proc
, new_argv
, current_dir
);
1138 return unbind_to (count
, proc
);
1141 /* This function is the unwind_protect form for Fstart_process. If
1142 PROC doesn't have its pid set, then we know someone has signalled
1143 an error and the process wasn't started successfully, so we should
1144 remove it from the process list. */
1146 start_process_unwind (proc
)
1149 if (!PROCESSP (proc
))
1152 /* Was PROC started successfully? */
1153 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1154 remove_process (proc
);
1161 create_process_1 (signo
)
1165 /* USG systems forget handlers when they are used;
1166 must reestablish each time */
1167 signal (signo
, create_process_1
);
1171 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1174 /* Mimic blocking of signals on system V, which doesn't really have it. */
1176 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1177 int sigchld_deferred
;
1180 create_process_sigchld ()
1182 signal (SIGCHLD
, create_process_sigchld
);
1184 sigchld_deferred
= 1;
1190 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1191 create_process (process
, new_argv
, current_dir
)
1192 Lisp_Object process
;
1194 Lisp_Object current_dir
;
1196 int pid
, inchannel
, outchannel
;
1199 SIGTYPE (*sigchld
)();
1201 /* Use volatile to protect variables from being clobbered by longjmp. */
1202 volatile int forkin
, forkout
;
1203 volatile int pty_flag
= 0;
1204 extern char **environ
;
1206 inchannel
= outchannel
= -1;
1209 if (!NILP (Vprocess_connection_type
))
1210 outchannel
= inchannel
= allocate_pty ();
1215 /* On USG systems it does not work to open the pty's tty here
1216 and then close and reopen it in the child. */
1218 /* Don't let this terminal become our controlling terminal
1219 (in case we don't have one). */
1220 forkout
= forkin
= open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1222 forkout
= forkin
= open (pty_name
, O_RDWR
, 0);
1225 report_file_error ("Opening pty", Qnil
);
1227 forkin
= forkout
= -1;
1228 #endif /* not USG */
1232 #endif /* HAVE_PTYS */
1235 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1236 report_file_error ("Opening socketpair", Qnil
);
1237 outchannel
= inchannel
= sv
[0];
1238 forkout
= forkin
= sv
[1];
1240 #else /* not SKTPAIR */
1243 pipe_with_inherited_out (sv
);
1247 pipe_with_inherited_in (sv
);
1250 #else /* not WINDOWSNT */
1257 #endif /* not WINDOWSNT */
1259 #endif /* not SKTPAIR */
1262 /* Replaced by close_process_descs */
1263 set_exclusive_use (inchannel
);
1264 set_exclusive_use (outchannel
);
1267 /* Stride people say it's a mystery why this is needed
1268 as well as the O_NDELAY, but that it fails without this. */
1269 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1272 ioctl (inchannel
, FIONBIO
, &one
);
1277 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1280 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1284 /* Record this as an active process, with its channels.
1285 As a result, child_setup will close Emacs's side of the pipes. */
1286 chan_process
[inchannel
] = process
;
1287 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1288 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1289 /* Record the tty descriptor used in the subprocess. */
1291 XPROCESS (process
)->subtty
= Qnil
;
1293 XSETFASTINT (XPROCESS (process
)->subtty
, forkin
);
1294 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1295 XPROCESS (process
)->status
= Qrun
;
1297 /* Delay interrupts until we have a chance to store
1298 the new fork's pid in its process structure */
1302 #else /* not BSD4_1 */
1303 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1304 sigsetmask (sigmask (SIGCHLD
));
1305 #else /* ordinary USG */
1307 sigchld_deferred
= 0;
1308 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1310 #endif /* ordinary USG */
1311 #endif /* not BSD4_1 */
1312 #endif /* SIGCHLD */
1314 FD_SET (inchannel
, &input_wait_mask
);
1315 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1316 if (inchannel
> max_process_desc
)
1317 max_process_desc
= inchannel
;
1319 /* Until we store the proper pid, enable sigchld_handler
1320 to recognize an unknown pid as standing for this process.
1321 It is very important not to let this `marker' value stay
1322 in the table after this function has returned; if it does
1323 it might cause call-process to hang and subsequent asynchronous
1324 processes to get their return values scrambled. */
1325 XSETINT (XPROCESS (process
)->pid
, -1);
1328 /* child_setup must clobber environ on systems with true vfork.
1329 Protect it from permanent change. */
1330 char **save_environ
= environ
;
1335 #endif /* not WINDOWSNT */
1337 int xforkin
= forkin
;
1338 int xforkout
= forkout
;
1340 #if 0 /* This was probably a mistake--it duplicates code later on,
1341 but fails to handle all the cases. */
1342 /* Make sure SIGCHLD is not blocked in the child. */
1343 sigsetmask (SIGEMPTYMASK
);
1346 /* Make the pty be the controlling terminal of the process. */
1348 /* First, disconnect its current controlling terminal. */
1350 /* We tried doing setsid only if pty_flag, but it caused
1351 process_set_signal to fail on SGI when using a pipe. */
1353 /* Make the pty's terminal the controlling terminal. */
1357 /* We ignore the return value
1358 because faith@cs.unc.edu says that is necessary on Linux. */
1359 ioctl (xforkin
, TIOCSCTTY
, 0);
1362 #else /* not HAVE_SETSID */
1364 /* It's very important to call setpgrp here and no time
1365 afterwards. Otherwise, we lose our controlling tty which
1366 is set when we open the pty. */
1369 #endif /* not HAVE_SETSID */
1370 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1371 if (pty_flag
&& xforkin
>= 0)
1374 tcgetattr (xforkin
, &t
);
1376 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1377 write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1380 #if defined (NTTYDISC) && defined (TIOCSETD)
1381 if (pty_flag
&& xforkin
>= 0)
1383 /* Use new line discipline. */
1384 int ldisc
= NTTYDISC
;
1385 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1390 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1391 can do TIOCSPGRP only to the process's controlling tty. */
1394 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1395 I can't test it since I don't have 4.3. */
1396 int j
= open ("/dev/tty", O_RDWR
, 0);
1397 ioctl (j
, TIOCNOTTY
, 0);
1400 /* In order to get a controlling terminal on some versions
1401 of BSD, it is necessary to put the process in pgrp 0
1402 before it opens the terminal. */
1410 #endif /* TIOCNOTTY */
1412 #if !defined (RTU) && !defined (UNIPLUS)
1413 /*** There is a suggestion that this ought to be a
1414 conditional on TIOCSPGRP. */
1415 /* Now close the pty (if we had it open) and reopen it.
1416 This makes the pty the controlling terminal of the subprocess. */
1419 #ifdef SET_CHILD_PTY_PGRP
1420 int pgrp
= getpid ();
1423 /* I wonder if close (open (pty_name, ...)) would work? */
1426 xforkout
= xforkin
= open (pty_name
, O_RDWR
, 0);
1430 write (1, "Couldn't open the pty terminal ", 31);
1431 write (1, pty_name
, strlen (pty_name
));
1436 #ifdef SET_CHILD_PTY_PGRP
1437 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1438 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1441 #endif /* not UNIPLUS and not RTU */
1442 #ifdef SETUP_SLAVE_PTY
1447 #endif /* SETUP_SLAVE_PTY */
1449 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1450 Now reenable it in the child, so it will die when we want it to. */
1452 signal (SIGHUP
, SIG_DFL
);
1454 #endif /* HAVE_PTYS */
1459 #else /* not BSD4_1 */
1460 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1461 sigsetmask (SIGEMPTYMASK
);
1462 #else /* ordinary USG */
1464 signal (SIGCHLD
, sigchld
);
1466 #endif /* ordinary USG */
1467 #endif /* not BSD4_1 */
1468 #endif /* SIGCHLD */
1470 signal (SIGINT
, SIG_DFL
);
1471 signal (SIGQUIT
, SIG_DFL
);
1474 child_setup_tty (xforkout
);
1476 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1477 new_argv
, 1, current_dir
);
1478 #else /* not WINDOWSNT */
1479 child_setup (xforkin
, xforkout
, xforkout
,
1480 new_argv
, 1, current_dir
);
1481 #endif /* not WINDOWSNT */
1483 environ
= save_environ
;
1490 if (forkin
!= forkout
&& forkout
>= 0)
1492 report_file_error ("Doing vfork", Qnil
);
1495 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
1498 register_child (pid
, inchannel
);
1499 #endif /* WINDOWSNT */
1501 /* If the subfork execv fails, and it exits,
1502 this close hangs. I don't know why.
1503 So have an interrupt jar it loose. */
1505 signal (SIGALRM
, create_process_1
);
1507 XPROCESS (process
)->subtty
= Qnil
;
1512 if (forkin
!= forkout
&& forkout
>= 0)
1517 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1520 XPROCESS (process
)->tty_name
= Qnil
;
1525 #else /* not BSD4_1 */
1526 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1527 sigsetmask (SIGEMPTYMASK
);
1528 #else /* ordinary USG */
1530 signal (SIGCHLD
, sigchld
);
1531 /* Now really handle any of these signals
1532 that came in during this function. */
1533 if (sigchld_deferred
)
1534 kill (getpid (), SIGCHLD
);
1536 #endif /* ordinary USG */
1537 #endif /* not BSD4_1 */
1538 #endif /* SIGCHLD */
1540 #endif /* not VMS */
1544 /* open a TCP network connection to a given HOST/SERVICE. Treated
1545 exactly like a normal process when reading and writing. Only
1546 differences are in status display and process deletion. A network
1547 connection has no PID; you cannot signal it. All you can do is
1548 deactivate and close it via delete-process */
1550 DEFUN ("open-network-stream", Fopen_network_stream
, Sopen_network_stream
,
1552 "Open a TCP connection for a service to a host.\n\
1553 Returns a subprocess-object to represent the connection.\n\
1554 Input and output work as for subprocesses; `delete-process' closes it.\n\
1555 Args are NAME BUFFER HOST SERVICE.\n\
1556 NAME is name for process. It is modified if necessary to make it unique.\n\
1557 BUFFER is the buffer (or buffer-name) to associate with the process.\n\
1558 Process output goes at end of that buffer, unless you specify\n\
1559 an output stream or filter function to handle the output.\n\
1560 BUFFER may be also nil, meaning that this process is not associated\n\
1562 Third arg is name of the host to connect to, or its IP address.\n\
1563 Fourth arg SERVICE is name of the service desired, or an integer\n\
1564 specifying a port number to connect to.")
1565 (name
, buffer
, host
, service
)
1566 Lisp_Object name
, buffer
, host
, service
;
1570 struct sockaddr_in address
;
1571 struct servent
*svc_info
;
1572 struct hostent
*host_info_ptr
, host_info
;
1573 char *(addr_list
[2]);
1574 IN_ADDR numeric_addr
;
1578 struct hostent host_info_fixed
;
1579 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1581 int count
= specpdl_ptr
- specpdl
;
1583 GCPRO4 (name
, buffer
, host
, service
);
1584 CHECK_STRING (name
, 0);
1585 CHECK_STRING (host
, 0);
1586 if (INTEGERP (service
))
1587 port
= htons ((unsigned short) XINT (service
));
1590 CHECK_STRING (service
, 0);
1591 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
1593 error ("Unknown service \"%s\"", XSTRING (service
)->data
);
1594 port
= svc_info
->s_port
;
1603 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
1605 if (! (host_info_ptr
== 0 && h_errno
== TRY_AGAIN
))
1608 Fsleep_for (make_number (1), Qnil
);
1610 if (host_info_ptr
== 0)
1611 /* Attempt to interpret host as numeric inet address */
1613 numeric_addr
= inet_addr ((char *) XSTRING (host
)->data
);
1614 if (NUMERIC_ADDR_ERROR
)
1615 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
1617 host_info_ptr
= &host_info
;
1618 host_info
.h_name
= 0;
1619 host_info
.h_aliases
= 0;
1620 host_info
.h_addrtype
= AF_INET
;
1622 /* Older machines have only one address slot called h_addr.
1623 Newer machines have h_addr_list, but #define h_addr to
1624 be its first element. */
1625 host_info
.h_addr_list
= &(addr_list
[0]);
1627 host_info
.h_addr
= (char*)(&numeric_addr
);
1629 host_info
.h_length
= strlen (addr_list
[0]);
1632 bzero (&address
, sizeof address
);
1633 bcopy (host_info_ptr
->h_addr
, (char *) &address
.sin_addr
,
1634 host_info_ptr
->h_length
);
1635 address
.sin_family
= host_info_ptr
->h_addrtype
;
1636 address
.sin_port
= port
;
1638 s
= socket (host_info_ptr
->h_addrtype
, SOCK_STREAM
, 0);
1640 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1642 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
1643 when connect is interrupted. So let's not let it get interrupted.
1644 Note we do not turn off polling, because polling is only used
1645 when not interrupt_input, and thus not normally used on the systems
1646 which have this bug. On systems which use polling, there's no way
1647 to quit if polling is turned off. */
1648 if (interrupt_input
)
1651 /* Slow down polling to every ten seconds.
1652 Some kernels have a bug which causes retrying connect to fail
1654 #ifdef POLL_FOR_INPUT
1655 bind_polling_period (10);
1659 if (connect (s
, (struct sockaddr
*) &address
, sizeof address
) == -1
1660 && errno
!= EISCONN
)
1666 if (errno
== EADDRINUSE
&& retry
< 20)
1668 /* A delay here is needed on some FreeBSD systems,
1669 and it is harmless, since this retrying takes time anyway
1670 and should be infrequent. */
1671 Fsleep_for (make_number (1), Qnil
);
1678 if (interrupt_input
)
1682 report_file_error ("connection failed",
1683 Fcons (host
, Fcons (name
, Qnil
)));
1686 #ifdef POLL_FOR_INPUT
1687 unbind_to (count
, Qnil
);
1690 if (interrupt_input
)
1694 s
= connect_server (0);
1696 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1697 send_command (s
, C_PORT
, 0, "%s:%d", XSTRING (host
)->data
, ntohs (port
));
1698 send_command (s
, C_DUMB
, 1, 0);
1704 report_file_error ("error duplicating socket", Fcons (name
, Qnil
));
1707 buffer
= Fget_buffer_create (buffer
);
1708 proc
= make_process (name
);
1710 chan_process
[inch
] = proc
;
1713 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
1716 fcntl (inch
, F_SETFL
, O_NDELAY
);
1720 XPROCESS (proc
)->childp
= host
;
1721 XPROCESS (proc
)->command_channel_p
= Qnil
;
1722 XPROCESS (proc
)->buffer
= buffer
;
1723 XPROCESS (proc
)->sentinel
= Qnil
;
1724 XPROCESS (proc
)->filter
= Qnil
;
1725 XPROCESS (proc
)->command
= Qnil
;
1726 XPROCESS (proc
)->pid
= Qnil
;
1727 XSETINT (XPROCESS (proc
)->infd
, s
);
1728 XSETINT (XPROCESS (proc
)->outfd
, outch
);
1729 XPROCESS (proc
)->status
= Qrun
;
1730 FD_SET (inch
, &input_wait_mask
);
1731 FD_SET (inch
, &non_keyboard_wait_mask
);
1732 if (inch
> max_process_desc
)
1733 max_process_desc
= inch
;
1738 #endif /* HAVE_SOCKETS */
1740 deactivate_process (proc
)
1743 register int inchannel
, outchannel
;
1744 register struct Lisp_Process
*p
= XPROCESS (proc
);
1746 inchannel
= XINT (p
->infd
);
1747 outchannel
= XINT (p
->outfd
);
1751 /* Beware SIGCHLD hereabouts. */
1752 flush_pending_output (inchannel
);
1755 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
1756 sys$
dassgn (outchannel
);
1757 vs
= get_vms_process_pointer (p
->pid
);
1759 give_back_vms_process_stuff (vs
);
1763 if (outchannel
>= 0 && outchannel
!= inchannel
)
1767 XSETINT (p
->infd
, -1);
1768 XSETINT (p
->outfd
, -1);
1769 chan_process
[inchannel
] = Qnil
;
1770 FD_CLR (inchannel
, &input_wait_mask
);
1771 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
1772 if (inchannel
== max_process_desc
)
1775 /* We just closed the highest-numbered process input descriptor,
1776 so recompute the highest-numbered one now. */
1777 max_process_desc
= 0;
1778 for (i
= 0; i
< MAXDESC
; i
++)
1779 if (!NILP (chan_process
[i
]))
1780 max_process_desc
= i
;
1785 /* Close all descriptors currently in use for communication
1786 with subprocess. This is used in a newly-forked subprocess
1787 to get rid of irrelevant descriptors. */
1789 close_process_descs ()
1793 for (i
= 0; i
< MAXDESC
; i
++)
1795 Lisp_Object process
;
1796 process
= chan_process
[i
];
1797 if (!NILP (process
))
1799 int in
= XINT (XPROCESS (process
)->infd
);
1800 int out
= XINT (XPROCESS (process
)->outfd
);
1803 if (out
>= 0 && in
!= out
)
1810 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
1812 "Allow any pending output from subprocesses to be read by Emacs.\n\
1813 It is read into the process' buffers or given to their filter functions.\n\
1814 Non-nil arg PROCESS means do not return until some output has been received\n\
1816 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
1817 seconds and microseconds to wait; return after that much time whether\n\
1818 or not there is input.\n\
1819 Return non-nil iff we received any output before the timeout expired.")
1820 (proc
, timeout
, timeout_msecs
)
1821 register Lisp_Object proc
, timeout
, timeout_msecs
;
1826 if (! NILP (timeout_msecs
))
1828 CHECK_NUMBER (timeout_msecs
, 2);
1829 useconds
= XINT (timeout_msecs
);
1830 if (!INTEGERP (timeout
))
1831 XSETINT (timeout
, 0);
1834 int carry
= useconds
/ 1000000;
1836 XSETINT (timeout
, XINT (timeout
) + carry
);
1837 useconds
-= carry
* 1000000;
1839 /* I think this clause is necessary because C doesn't
1840 guarantee a particular rounding direction for negative
1844 XSETINT (timeout
, XINT (timeout
) - 1);
1845 useconds
+= 1000000;
1852 if (! NILP (timeout
))
1854 CHECK_NUMBER (timeout
, 1);
1855 seconds
= XINT (timeout
);
1868 XSETFASTINT (proc
, 0);
1871 (wait_reading_process_input (seconds
, useconds
, proc
, 0)
1875 /* This variable is different from waiting_for_input in keyboard.c.
1876 It is used to communicate to a lisp process-filter/sentinel (via the
1877 function Fwaiting_for_user_input_p below) whether emacs was waiting
1878 for user-input when that process-filter was called.
1879 waiting_for_input cannot be used as that is by definition 0 when
1880 lisp code is being evalled.
1881 This is also used in record_asynch_buffer_change.
1882 For that purpose, this must be 0
1883 when not inside wait_reading_process_input. */
1884 static int waiting_for_user_input_p
;
1886 /* Read and dispose of subprocess output while waiting for timeout to
1887 elapse and/or keyboard input to be available.
1890 timeout in seconds, or
1891 zero for no limit, or
1892 -1 means gobble data immediately available but don't wait for any.
1895 an additional duration to wait, measured in microseconds.
1896 If this is nonzero and time_limit is 0, then the timeout
1897 consists of MICROSECS only.
1899 READ_KBD is a lisp value:
1900 0 to ignore keyboard input, or
1901 1 to return when input is available, or
1902 -1 meaning caller will actually read the input, so don't throw to
1903 the quit handler, or
1904 a cons cell, meaning wait until its car is non-nil
1905 (and gobble terminal input into the buffer if any arrives), or
1906 a process object, meaning wait until something arrives from that
1907 process. The return value is true iff we read some input from
1910 DO_DISPLAY != 0 means redisplay should be done to show subprocess
1911 output that arrives.
1913 If READ_KBD is a pointer to a struct Lisp_Process, then the
1914 function returns true iff we received input from that process
1915 before the timeout elapsed.
1916 Otherwise, return true iff we received input from any process. */
1918 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
1919 int time_limit
, microsecs
;
1920 Lisp_Object read_kbd
;
1923 register int channel
, nfds
, m
;
1924 static SELECT_TYPE Available
;
1927 EMACS_TIME timeout
, end_time
, garbage
;
1929 int wait_channel
= -1;
1930 struct Lisp_Process
*wait_proc
= 0;
1931 int got_some_input
= 0;
1932 Lisp_Object
*wait_for_cell
= 0;
1934 FD_ZERO (&Available
);
1936 /* If read_kbd is a process to watch, set wait_proc and wait_channel
1938 if (PROCESSP (read_kbd
))
1940 wait_proc
= XPROCESS (read_kbd
);
1941 wait_channel
= XINT (wait_proc
->infd
);
1942 XSETFASTINT (read_kbd
, 0);
1945 /* If waiting for non-nil in a cell, record where. */
1946 if (CONSP (read_kbd
))
1948 wait_for_cell
= &XCONS (read_kbd
)->car
;
1949 XSETFASTINT (read_kbd
, 0);
1952 waiting_for_user_input_p
= XINT (read_kbd
);
1954 /* Since we may need to wait several times,
1955 compute the absolute time to return at. */
1956 if (time_limit
|| microsecs
)
1958 EMACS_GET_TIME (end_time
);
1959 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
1960 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
1965 /* If calling from keyboard input, do not quit
1966 since we want to return C-g as an input character.
1967 Otherwise, do pending quit if requested. */
1968 if (XINT (read_kbd
) >= 0)
1971 /* Exit now if the cell we're waiting for became non-nil. */
1972 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
1975 /* Compute time from now till when time limit is up */
1976 /* Exit if already run out */
1977 if (time_limit
== -1)
1979 /* -1 specified for timeout means
1980 gobble output available now
1981 but don't wait at all. */
1983 EMACS_SET_SECS_USECS (timeout
, 0, 0);
1985 else if (time_limit
|| microsecs
)
1987 EMACS_GET_TIME (timeout
);
1988 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
1989 if (EMACS_TIME_NEG_P (timeout
))
1994 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
1997 /* Cause C-g and alarm signals to take immediate action,
1998 and cause input available signals to zero out timeout.
2000 It is important that we do this before checking for process
2001 activity. If we get a SIGCHLD after the explicit checks for
2002 process activity, timeout is the only way we will know. */
2003 if (XINT (read_kbd
) < 0)
2004 set_waiting_for_input (&timeout
);
2006 /* If status of something has changed, and no input is
2007 available, notify the user of the change right away. After
2008 this explicit check, we'll let the SIGCHLD handler zap
2009 timeout to get our attention. */
2010 if (update_tick
!= process_tick
&& do_display
)
2012 Atemp
= input_wait_mask
;
2013 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2014 if ((select (MAXDESC
, &Atemp
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2018 /* It's okay for us to do this and then continue with
2019 the loop, since timeout has already been zeroed out. */
2020 clear_waiting_for_input ();
2025 /* Don't wait for output from a non-running process. */
2026 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
2027 update_status (wait_proc
);
2029 && ! EQ (wait_proc
->status
, Qrun
))
2031 clear_waiting_for_input ();
2035 /* Wait till there is something to do */
2037 if (! XINT (read_kbd
) && wait_for_cell
== 0)
2038 Available
= non_keyboard_wait_mask
;
2040 Available
= input_wait_mask
;
2042 /* If frame size has changed or the window is newly mapped,
2043 redisplay now, before we start to wait. There is a race
2044 condition here; if a SIGIO arrives between now and the select
2045 and indicates that a frame is trashed, the select may block
2046 displaying a trashed screen. */
2047 if (frame_garbaged
&& do_display
)
2049 clear_waiting_for_input ();
2050 redisplay_preserve_echo_area ();
2051 if (XINT (read_kbd
) < 0)
2052 set_waiting_for_input (&timeout
);
2055 if (XINT (read_kbd
) && detect_input_pending ())
2058 FD_ZERO (&Available
);
2061 nfds
= select (MAXDESC
, &Available
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2066 /* Make C-g and alarm signals set flags again */
2067 clear_waiting_for_input ();
2069 /* If we woke up due to SIGWINCH, actually change size now. */
2070 do_pending_window_change ();
2072 if (time_limit
&& nfds
== 0) /* timeout elapsed */
2076 if (xerrno
== EINTR
)
2077 FD_ZERO (&Available
);
2079 /* Ultrix select seems to return ENOMEM when it is
2080 interrupted. Treat it just like EINTR. Bleah. Note
2081 that we want to test for the "ultrix" CPP symbol, not
2082 "__ultrix__"; the latter is only defined under GCC, but
2083 not by DEC's bundled CC. -JimB */
2084 else if (xerrno
== ENOMEM
)
2085 FD_ZERO (&Available
);
2088 /* This happens for no known reason on ALLIANT.
2089 I am guessing that this is the right response. -- RMS. */
2090 else if (xerrno
== EFAULT
)
2091 FD_ZERO (&Available
);
2093 else if (xerrno
== EBADF
)
2096 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
2097 the child's closure of the pts gives the parent a SIGHUP, and
2098 the ptc file descriptor is automatically closed,
2099 yielding EBADF here or at select() call above.
2100 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
2101 in m/ibmrt-aix.h), and here we just ignore the select error.
2102 Cleanup occurs c/o status_notify after SIGCLD. */
2103 FD_ZERO (&Available
); /* Cannot depend on values returned */
2109 error("select error: %s", strerror (xerrno
));
2111 #if defined(sun) && !defined(USG5_4)
2112 else if (nfds
> 0 && keyboard_bit_set (&Available
)
2114 /* System sometimes fails to deliver SIGIO.
2116 David J. Mackenzie says that Emacs doesn't compile under
2117 Solaris if this code is enabled, thus the USG5_4 in the CPP
2118 conditional. "I haven't noticed any ill effects so far.
2119 If you find a Solaris expert somewhere, they might know
2121 kill (getpid (), SIGIO
);
2124 /* Check for keyboard input */
2125 /* If there is any, return immediately
2126 to give it higher priority than subprocesses */
2128 /* We used to do this if wait_for_cell,
2129 but that caused infinite recursion in selection request events. */
2130 if ((XINT (read_kbd
) || wait_for_cell
)
2131 && detect_input_pending ())
2134 if (detect_input_pending ())
2138 /* Exit now if the cell we're waiting for became non-nil. */
2139 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2143 /* If we think we have keyboard input waiting, but didn't get SIGIO
2144 go read it. This can happen with X on BSD after logging out.
2145 In that case, there really is no input and no SIGIO,
2146 but select says there is input. */
2148 if (XINT (read_kbd
) && interrupt_input
2149 && (keyboard_bit_set (&Available
)))
2154 got_some_input
|= nfds
> 0;
2156 /* If checking input just got us a size-change event from X,
2157 obey it now if we should. */
2158 if (XINT (read_kbd
) || wait_for_cell
)
2159 do_pending_window_change ();
2161 /* Check for data from a process. */
2162 /* Really FIRST_PROC_DESC should be 0 on Unix,
2163 but this is safer in the short run. */
2164 for (channel
= 0; channel
<= max_process_desc
; channel
++)
2166 if (FD_ISSET (channel
, &Available
)
2167 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
2171 /* If waiting for this channel, arrange to return as
2172 soon as no more input to be processed. No more
2174 if (wait_channel
== channel
)
2180 proc
= chan_process
[channel
];
2184 /* Read data from the process, starting with our
2185 buffered-ahead character if we have one. */
2187 nread
= read_process_output (proc
, channel
);
2190 /* Since read_process_output can run a filter,
2191 which can call accept-process-output,
2192 don't try to read from any other processes
2193 before doing the select again. */
2194 FD_ZERO (&Available
);
2197 redisplay_preserve_echo_area ();
2200 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2204 else if (nread
== -1 && errno
== EAGAIN
)
2208 else if (nread
== -1 && errno
== EAGAIN
)
2210 /* Note that we cannot distinguish between no input
2211 available now and a closed pipe.
2212 With luck, a closed pipe will be accompanied by
2213 subprocess termination and SIGCHLD. */
2214 else if (nread
== 0 && !NETCONN_P (proc
))
2216 #endif /* O_NDELAY */
2217 #endif /* O_NONBLOCK */
2218 #endif /* EWOULDBLOCK */
2220 /* On some OSs with ptys, when the process on one end of
2221 a pty exits, the other end gets an error reading with
2222 errno = EIO instead of getting an EOF (0 bytes read).
2223 Therefore, if we get an error reading and errno =
2224 EIO, just continue, because the child process has
2225 exited and should clean itself up soon (e.g. when we
2227 else if (nread
== -1 && errno
== EIO
)
2229 #endif /* HAVE_PTYS */
2230 /* If we can detect process termination, don't consider the process
2231 gone just because its pipe is closed. */
2233 else if (nread
== 0 && !NETCONN_P (proc
))
2238 /* Preserve status of processes already terminated. */
2239 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2240 deactivate_process (proc
);
2241 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2242 update_status (XPROCESS (proc
));
2243 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2244 XPROCESS (proc
)->status
2245 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2248 } /* end for each file descriptor */
2249 } /* end while exit conditions not met */
2251 waiting_for_user_input_p
= 0;
2253 /* If calling from keyboard input, do not quit
2254 since we want to return C-g as an input character.
2255 Otherwise, do pending quit if requested. */
2256 if (XINT (read_kbd
) >= 0)
2258 /* Prevent input_pending from remaining set if we quit. */
2259 clear_input_pending ();
2263 return got_some_input
;
2266 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
2269 read_process_output_call (fun_and_args
)
2270 Lisp_Object fun_and_args
;
2272 return apply1 (XCONS (fun_and_args
)->car
, XCONS (fun_and_args
)->cdr
);
2276 read_process_output_error_handler (error
)
2279 cmd_error_internal (error
, "error in process filter: ");
2281 update_echo_area ();
2282 Fsleep_for (make_number (2), Qnil
);
2285 /* Read pending output from the process channel,
2286 starting with our buffered-ahead character if we have one.
2287 Yield number of characters read.
2289 This function reads at most 1024 characters.
2290 If you want to read all available subprocess output,
2291 you must call it repeatedly until it returns zero. */
2293 read_process_output (proc
, channel
)
2295 register int channel
;
2297 register int nchars
;
2303 register Lisp_Object outstream
;
2304 register struct buffer
*old
= current_buffer
;
2305 register struct Lisp_Process
*p
= XPROCESS (proc
);
2306 register int opoint
;
2309 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2311 vs
= get_vms_process_pointer (p
->pid
);
2315 return(0); /* Really weird if it does this */
2316 if (!(vs
->iosb
[0] & 1))
2317 return -1; /* I/O error */
2320 error ("Could not get VMS process pointer");
2321 chars
= vs
->inputBuffer
;
2322 nchars
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2325 start_vms_process_read (vs
); /* Crank up the next read on the process */
2326 return 1; /* Nothing worth printing, say we got 1 */
2330 if (proc_buffered_char
[channel
] < 0)
2332 nchars
= read_child_output (channel
, chars
, sizeof (chars
));
2334 nchars
= read (channel
, chars
, sizeof chars
);
2338 chars
[0] = proc_buffered_char
[channel
];
2339 proc_buffered_char
[channel
] = -1;
2341 nchars
= read_child_output (channel
, chars
+ 1, sizeof (chars
) - 1);
2343 nchars
= read (channel
, chars
+ 1, sizeof chars
- 1);
2348 nchars
= nchars
+ 1;
2350 #endif /* not VMS */
2352 if (nchars
<= 0) return nchars
;
2354 outstream
= p
->filter
;
2355 if (!NILP (outstream
))
2357 /* We inhibit quit here instead of just catching it so that
2358 hitting ^G when a filter happens to be running won't screw
2360 int count
= specpdl_ptr
- specpdl
;
2361 Lisp_Object odeactivate
;
2362 Lisp_Object obuffer
, okeymap
;
2364 /* No need to gcpro these, because all we do with them later
2365 is test them for EQness, and none of them should be a string. */
2366 odeactivate
= Vdeactivate_mark
;
2367 XSETBUFFER (obuffer
, current_buffer
);
2368 okeymap
= current_buffer
->keymap
;
2370 specbind (Qinhibit_quit
, Qt
);
2371 specbind (Qlast_nonmenu_event
, Qt
);
2373 running_asynch_code
= 1;
2374 internal_condition_case_1 (read_process_output_call
,
2377 Fcons (make_string (chars
,
2380 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
2381 read_process_output_error_handler
);
2382 running_asynch_code
= 0;
2383 restore_match_data ();
2385 /* Handling the process output should not deactivate the mark. */
2386 Vdeactivate_mark
= odeactivate
;
2388 if (! EQ (Fcurrent_buffer (), obuffer
)
2389 || ! EQ (current_buffer
->keymap
, okeymap
))
2390 record_asynch_buffer_change ();
2392 if (waiting_for_user_input_p
)
2393 prepare_menu_bars ();
2396 start_vms_process_read (vs
);
2398 unbind_to (count
, Qnil
);
2402 /* If no filter, write into buffer if it isn't dead. */
2403 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2405 Lisp_Object old_read_only
;
2406 Lisp_Object old_begv
, old_zv
;
2407 Lisp_Object odeactivate
;
2409 odeactivate
= Vdeactivate_mark
;
2411 Fset_buffer (p
->buffer
);
2413 old_read_only
= current_buffer
->read_only
;
2414 XSETFASTINT (old_begv
, BEGV
);
2415 XSETFASTINT (old_zv
, ZV
);
2417 current_buffer
->read_only
= Qnil
;
2419 /* Insert new output into buffer
2420 at the current end-of-output marker,
2421 thus preserving logical ordering of input and output. */
2422 if (XMARKER (p
->mark
)->buffer
)
2423 SET_PT (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
));
2427 /* If the output marker is outside of the visible region, save
2428 the restriction and widen. */
2429 if (! (BEGV
<= point
&& point
<= ZV
))
2432 /* Make sure opoint floats ahead of any new text, just as point
2434 if (point
<= opoint
)
2437 /* Insert after old_begv, but before old_zv. */
2438 if (point
< XFASTINT (old_begv
))
2439 XSETFASTINT (old_begv
, XFASTINT (old_begv
) + nchars
);
2440 if (point
<= XFASTINT (old_zv
))
2441 XSETFASTINT (old_zv
, XFASTINT (old_zv
) + nchars
);
2443 /* Insert before markers in case we are inserting where
2444 the buffer's mark is, and the user's next command is Meta-y. */
2445 insert_before_markers (chars
, nchars
);
2446 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
2448 update_mode_lines
++;
2450 /* If the restriction isn't what it should be, set it. */
2451 if (XFASTINT (old_begv
) != BEGV
|| XFASTINT (old_zv
) != ZV
)
2452 Fnarrow_to_region (old_begv
, old_zv
);
2454 /* Handling the process output should not deactivate the mark. */
2455 Vdeactivate_mark
= odeactivate
;
2457 current_buffer
->read_only
= old_read_only
;
2459 set_buffer_internal (old
);
2462 start_vms_process_read (vs
);
2467 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
2469 "Returns non-nil if emacs is waiting for input from the user.\n\
2470 This is intended for use by asynchronous process output filters and sentinels.")
2473 return (waiting_for_user_input_p
? Qt
: Qnil
);
2476 /* Sending data to subprocess */
2478 jmp_buf send_process_frame
;
2481 send_process_trap ()
2487 longjmp (send_process_frame
, 1);
2490 /* Send some data to process PROC.
2491 BUF is the beginning of the data; LEN is the number of characters.
2492 OBJECT is the Lisp object that the data comes from. */
2494 send_process (proc
, buf
, len
, object
)
2495 volatile Lisp_Object proc
;
2500 /* Use volatile to protect variables from being clobbered by longjmp. */
2502 volatile unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
2505 struct Lisp_Process
*p
= XPROCESS (proc
);
2506 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2509 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2510 update_status (XPROCESS (proc
));
2511 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2512 error ("Process %s not running", procname
);
2515 vs
= get_vms_process_pointer (p
->pid
);
2517 error ("Could not find this process: %x", p
->pid
);
2518 else if (write_to_vms_process (vs
, buf
, len
))
2522 if (pty_max_bytes
== 0)
2524 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
2525 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
2527 if (pty_max_bytes
< 0)
2528 pty_max_bytes
= 250;
2530 pty_max_bytes
= 250;
2532 /* Deduct one, to leave space for the eof. */
2536 if (!setjmp (send_process_frame
))
2540 SIGTYPE (*old_sigpipe
)();
2543 /* Decide how much data we can send in one batch.
2544 Long lines need to be split into multiple batches. */
2545 if (!NILP (XPROCESS (proc
)->pty_flag
))
2547 /* Starting this at zero is always correct when not the first iteration
2548 because the previous iteration ended by sending C-d.
2549 It may not be correct for the first iteration
2550 if a partial line was sent in a separate send_process call.
2551 If that proves worth handling, we need to save linepos
2552 in the process object. */
2555 char *end
= buf
+ len
;
2557 /* Scan through this text for a line that is too long. */
2558 while (ptr
!= end
&& linepos
< pty_max_bytes
)
2566 /* If we found one, break the line there
2567 and put in a C-d to force the buffer through. */
2571 /* Send this batch, using one or more write calls. */
2574 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
2575 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
2576 signal (SIGPIPE
, old_sigpipe
);
2582 || errno
== EWOULDBLOCK
2588 /* Buffer is full. Wait, accepting input;
2589 that may allow the program
2590 to finish doing output and read more. */
2595 /* Running filters might relocate buffers or strings.
2596 Arrange to relocate BUF. */
2597 if (BUFFERP (object
))
2598 offset
= BUF_PTR_CHAR_POS (XBUFFER (object
),
2599 (unsigned char *) buf
);
2600 else if (STRINGP (object
))
2601 offset
= buf
- (char *) XSTRING (object
)->data
;
2603 XSETFASTINT (zero
, 0);
2604 wait_reading_process_input (1, 0, zero
, 0);
2606 if (BUFFERP (object
))
2607 buf
= (char *) BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
2608 else if (STRINGP (object
))
2609 buf
= offset
+ (char *) XSTRING (object
)->data
;
2614 /* This is a real error. */
2615 report_file_error ("writing to process", Fcons (proc
, Qnil
));
2622 /* If we sent just part of the string, put in an EOF
2623 to force it through, before we send the rest. */
2625 Fprocess_send_eof (proc
);
2630 XPROCESS (proc
)->raw_status_low
= Qnil
;
2631 XPROCESS (proc
)->raw_status_high
= Qnil
;
2632 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2633 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2634 deactivate_process (proc
);
2636 error ("Error writing to process %s; closed it", procname
);
2638 error ("SIGPIPE raised on process %s; closed it", procname
);
2643 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
2645 "Send current contents of region as input to PROCESS.\n\
2646 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2647 nil, indicating the current buffer's process.\n\
2648 Called from program, takes three arguments, PROCESS, START and END.\n\
2649 If the region is more than 500 characters long,\n\
2650 it is sent in several bunches. This may happen even for shorter regions.\n\
2651 Output from processes can arrive in between bunches.")
2652 (process
, start
, end
)
2653 Lisp_Object process
, start
, end
;
2658 proc
= get_process (process
);
2659 validate_region (&start
, &end
);
2661 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
2664 start1
= XINT (start
);
2665 send_process (proc
, &FETCH_CHAR (start1
), XINT (end
) - XINT (start
),
2666 Fcurrent_buffer ());
2671 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
2673 "Send PROCESS the contents of STRING as input.\n\
2674 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2675 nil, indicating the current buffer's process.\n\
2676 If STRING is more than 500 characters long,\n\
2677 it is sent in several bunches. This may happen even for shorter strings.\n\
2678 Output from processes can arrive in between bunches.")
2680 Lisp_Object process
, string
;
2683 CHECK_STRING (string
, 1);
2684 proc
= get_process (process
);
2685 send_process (proc
, XSTRING (string
)->data
, XSTRING (string
)->size
, string
);
2689 /* send a signal number SIGNO to PROCESS.
2690 CURRENT_GROUP means send to the process group that currently owns
2691 the terminal being used to communicate with PROCESS.
2692 This is used for various commands in shell mode.
2693 If NOMSG is zero, insert signal-announcements into process's buffers
2696 If we can, we try to signal PROCESS by sending control characters
2697 down the pty. This allows us to signal inferiors who have changed
2698 their uid, for which killpg would return an EPERM error. */
2701 process_send_signal (process
, signo
, current_group
, nomsg
)
2702 Lisp_Object process
;
2704 Lisp_Object current_group
;
2708 register struct Lisp_Process
*p
;
2712 proc
= get_process (process
);
2713 p
= XPROCESS (proc
);
2715 if (!EQ (p
->childp
, Qt
))
2716 error ("Process %s is not a subprocess",
2717 XSTRING (p
->name
)->data
);
2718 if (XINT (p
->infd
) < 0)
2719 error ("Process %s is not active",
2720 XSTRING (p
->name
)->data
);
2722 if (NILP (p
->pty_flag
))
2723 current_group
= Qnil
;
2725 /* If we are using pgrps, get a pgrp number and make it negative. */
2726 if (!NILP (current_group
))
2728 #ifdef SIGNALS_VIA_CHARACTERS
2729 /* If possible, send signals to the entire pgrp
2730 by sending an input character to it. */
2732 /* TERMIOS is the latest and bestest, and seems most likely to
2733 work. If the system has it, use it. */
2740 tcgetattr (XINT (p
->infd
), &t
);
2741 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2745 tcgetattr (XINT (p
->infd
), &t
);
2746 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2750 tcgetattr (XINT (p
->infd
), &t
);
2751 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
2752 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2754 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
2759 #else /* ! HAVE_TERMIOS */
2761 /* On Berkeley descendants, the following IOCTL's retrieve the
2762 current control characters. */
2763 #if defined (TIOCGLTC) && defined (TIOCGETC)
2771 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2772 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
2775 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2776 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
2780 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
2781 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
2783 #endif /* ! defined (SIGTSTP) */
2786 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2788 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
2795 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2796 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2799 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2800 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2804 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2805 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2807 #endif /* ! defined (SIGTSTP) */
2809 #else /* ! defined (TCGETA) */
2810 Your configuration files are messed up
.
2811 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
2812 you'd better be using one of the alternatives above! */
2813 #endif /* ! defined (TCGETA) */
2814 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2815 #endif /* ! defined HAVE_TERMIOS */
2816 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
2819 /* Get the pgrp using the tty itself, if we have that.
2820 Otherwise, use the pty to get the pgrp.
2821 On pfa systems, saka@pfu.fujitsu.co.JP writes:
2822 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
2823 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
2824 His patch indicates that if TIOCGPGRP returns an error, then
2825 we should just assume that p->pid is also the process group id. */
2829 if (!NILP (p
->subtty
))
2830 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
2832 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
2836 gid
= - XFASTINT (p
->pid
);
2837 #endif /* ! defined (pfa) */
2843 #else /* ! defined (TIOCGPGRP ) */
2844 /* Can't select pgrps on this system, so we know that
2845 the child itself heads the pgrp. */
2846 gid
= - XFASTINT (p
->pid
);
2847 #endif /* ! defined (TIOCGPGRP ) */
2850 gid
= - XFASTINT (p
->pid
);
2856 p
->raw_status_low
= Qnil
;
2857 p
->raw_status_high
= Qnil
;
2859 XSETINT (p
->tick
, ++process_tick
);
2863 #endif /* ! defined (SIGCONT) */
2866 send_process (proc
, "\003", 1, Qnil
); /* ^C */
2871 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
2876 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
2879 flush_pending_output (XINT (p
->infd
));
2883 /* If we don't have process groups, send the signal to the immediate
2884 subprocess. That isn't really right, but it's better than any
2885 obvious alternative. */
2888 kill (XFASTINT (p
->pid
), signo
);
2892 /* gid may be a pid, or minus a pgrp's number */
2894 if (!NILP (current_group
))
2895 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
2898 gid
= - XFASTINT (p
->pid
);
2901 #else /* ! defined (TIOCSIGSEND) */
2902 EMACS_KILLPG (-gid
, signo
);
2903 #endif /* ! defined (TIOCSIGSEND) */
2906 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
2907 "Interrupt process PROCESS. May be process or name of one.\n\
2908 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
2909 nil or no arg means current buffer's process.\n\
2910 Second arg CURRENT-GROUP non-nil means send signal to\n\
2911 the current process-group of the process's controlling terminal\n\
2912 rather than to the process's own process group.\n\
2913 If the process is a shell, this means interrupt current subjob\n\
2914 rather than the shell.")
2915 (process
, current_group
)
2916 Lisp_Object process
, current_group
;
2918 process_send_signal (process
, SIGINT
, current_group
, 0);
2922 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
2923 "Kill process PROCESS. May be process or name of one.\n\
2924 See function `interrupt-process' for more details on usage.")
2925 (process
, current_group
)
2926 Lisp_Object process
, current_group
;
2928 process_send_signal (process
, SIGKILL
, current_group
, 0);
2932 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
2933 "Send QUIT signal to process PROCESS. May be process or name of one.\n\
2934 See function `interrupt-process' for more details on usage.")
2935 (process
, current_group
)
2936 Lisp_Object process
, current_group
;
2938 process_send_signal (process
, SIGQUIT
, current_group
, 0);
2942 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
2943 "Stop process PROCESS. May be process or name of one.\n\
2944 See function `interrupt-process' for more details on usage.")
2945 (process
, current_group
)
2946 Lisp_Object process
, current_group
;
2949 error ("no SIGTSTP support");
2951 process_send_signal (process
, SIGTSTP
, current_group
, 0);
2956 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
2957 "Continue process PROCESS. May be process or name of one.\n\
2958 See function `interrupt-process' for more details on usage.")
2959 (process
, current_group
)
2960 Lisp_Object process
, current_group
;
2963 process_send_signal (process
, SIGCONT
, current_group
, 0);
2965 error ("no SIGCONT support");
2970 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
2971 2, 2, "nProcess number: \nnSignal code: ",
2972 "Send the process with process id PID the signal with code SIGCODE.\n\
2973 PID must be an integer. The process need not be a child of this Emacs.\n\
2974 SIGCODE may be an integer, or a symbol whose name is a signal name.")
2976 Lisp_Object pid
, sigcode
;
2978 CHECK_NUMBER (pid
, 0);
2980 #define handle_signal(NAME, VALUE) \
2981 else if (!strcmp (name, NAME)) \
2982 XSETINT (sigcode, VALUE)
2984 if (INTEGERP (sigcode
))
2988 unsigned char *name
;
2990 CHECK_SYMBOL (sigcode
, 1);
2991 name
= XSYMBOL (sigcode
)->name
->data
;
2996 handle_signal ("SIGHUP", SIGHUP
);
2999 handle_signal ("SIGINT", SIGINT
);
3002 handle_signal ("SIGQUIT", SIGQUIT
);
3005 handle_signal ("SIGILL", SIGILL
);
3008 handle_signal ("SIGABRT", SIGABRT
);
3011 handle_signal ("SIGEMT", SIGEMT
);
3014 handle_signal ("SIGKILL", SIGKILL
);
3017 handle_signal ("SIGFPE", SIGFPE
);
3020 handle_signal ("SIGBUS", SIGBUS
);
3023 handle_signal ("SIGSEGV", SIGSEGV
);
3026 handle_signal ("SIGSYS", SIGSYS
);
3029 handle_signal ("SIGPIPE", SIGPIPE
);
3032 handle_signal ("SIGALRM", SIGALRM
);
3035 handle_signal ("SIGTERM", SIGTERM
);
3038 handle_signal ("SIGURG", SIGURG
);
3041 handle_signal ("SIGSTOP", SIGSTOP
);
3044 handle_signal ("SIGTSTP", SIGTSTP
);
3047 handle_signal ("SIGCONT", SIGCONT
);
3050 handle_signal ("SIGCHLD", SIGCHLD
);
3053 handle_signal ("SIGTTIN", SIGTTIN
);
3056 handle_signal ("SIGTTOU", SIGTTOU
);
3059 handle_signal ("SIGIO", SIGIO
);
3062 handle_signal ("SIGXCPU", SIGXCPU
);
3065 handle_signal ("SIGXFSZ", SIGXFSZ
);
3068 handle_signal ("SIGVTALRM", SIGVTALRM
);
3071 handle_signal ("SIGPROF", SIGPROF
);
3074 handle_signal ("SIGWINCH", SIGWINCH
);
3077 handle_signal ("SIGINFO", SIGINFO
);
3080 handle_signal ("SIGUSR1", SIGUSR1
);
3083 handle_signal ("SIGUSR2", SIGUSR2
);
3086 error ("Undefined signal name %s", name
);
3089 #undef handle_signal
3092 /* Only works for kill-type signals */
3093 return make_number (win32_kill_process (XINT (pid
), XINT (sigcode
)));
3095 return make_number (kill (XINT (pid
), XINT (sigcode
)));
3099 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
3100 "Make PROCESS see end-of-file in its input.\n\
3101 Eof comes after any text already sent to it.\n\
3102 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3103 nil, indicating the current buffer's process.\n\
3104 If PROCESS is a network connection, or is a process communicating\n\
3105 through a pipe (as opposed to a pty), then you cannot send any more\n\
3106 text to PROCESS after you call this function.")
3108 Lisp_Object process
;
3112 proc
= get_process (process
);
3114 /* Make sure the process is really alive. */
3115 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3116 update_status (XPROCESS (proc
));
3117 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3118 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
3121 send_process (proc
, "\032", 1, Qnil
); /* ^z */
3123 if (!NILP (XPROCESS (proc
)->pty_flag
))
3124 send_process (proc
, "\004", 1, Qnil
);
3127 close (XINT (XPROCESS (proc
)->outfd
));
3128 XSETINT (XPROCESS (proc
)->outfd
, open (NULL_DEVICE
, O_WRONLY
));
3134 /* Kill all processes associated with `buffer'.
3135 If `buffer' is nil, kill all processes */
3137 kill_buffer_processes (buffer
)
3140 Lisp_Object tail
, proc
;
3142 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3144 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3145 if (GC_PROCESSP (proc
)
3146 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
3148 if (NETCONN_P (proc
))
3149 Fdelete_process (proc
);
3150 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
3151 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
3156 /* On receipt of a signal that a child status has changed,
3157 loop asking about children with changed statuses until
3158 the system says there are no more.
3159 All we do is change the status;
3160 we do not run sentinels or print notifications.
3161 That is saved for the next time keyboard input is done,
3162 in order to avoid timing errors. */
3164 /** WARNING: this can be called during garbage collection.
3165 Therefore, it must not be fooled by the presence of mark bits in
3168 /** USG WARNING: Although it is not obvious from the documentation
3169 in signal(2), on a USG system the SIGCLD handler MUST NOT call
3170 signal() before executing at least one wait(), otherwise the handler
3171 will be called again, resulting in an infinite loop. The relevant
3172 portion of the documentation reads "SIGCLD signals will be queued
3173 and the signal-catching function will be continually reentered until
3174 the queue is empty". Invoking signal() causes the kernel to reexamine
3175 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
3178 sigchld_handler (signo
)
3181 int old_errno
= errno
;
3183 register struct Lisp_Process
*p
;
3184 extern EMACS_TIME
*input_available_clear_time
;
3188 sigheld
|= sigbit (SIGCHLD
);
3200 #endif /* no WUNTRACED */
3201 /* Keep trying to get a status until we get a definitive result. */
3205 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
3207 while (pid
<= 0 && errno
== EINTR
);
3211 /* A real failure. We have done all our job, so return. */
3213 /* USG systems forget handlers when they are used;
3214 must reestablish each time */
3216 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
3219 sigheld
&= ~sigbit (SIGCHLD
);
3227 #endif /* no WNOHANG */
3229 /* Find the process that signaled us, and record its status. */
3232 for (tail
= Vprocess_alist
; XSYMBOL (tail
) != XSYMBOL (Qnil
); tail
= XCONS (tail
)->cdr
)
3234 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3235 p
= XPROCESS (proc
);
3236 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
3241 /* Look for an asynchronous process whose pid hasn't been filled
3244 for (tail
= Vprocess_alist
; XSYMBOL (tail
) != XSYMBOL (Qnil
); tail
= XCONS (tail
)->cdr
)
3246 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3247 p
= XPROCESS (proc
);
3248 if (INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
3253 /* Change the status of the process that was found. */
3256 union { int i
; WAITTYPE wt
; } u
;
3257 int clear_desc_flag
= 0;
3259 XSETINT (p
->tick
, ++process_tick
);
3261 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
3262 XSETINT (p
->raw_status_high
, u
.i
>> 16);
3264 /* If process has terminated, stop waiting for its output. */
3265 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
3266 && XINT (p
->infd
) >= 0)
3267 clear_desc_flag
= 1;
3269 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
3270 if (clear_desc_flag
)
3272 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
3273 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
3276 /* Tell wait_reading_process_input that it needs to wake up and
3278 if (input_available_clear_time
)
3279 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3282 /* There was no asynchronous process found for that id. Check
3283 if we have a synchronous process. */
3286 synch_process_alive
= 0;
3288 /* Report the status of the synchronous process. */
3290 synch_process_retcode
= WRETCODE (w
);
3291 else if (WIFSIGNALED (w
))
3293 int code
= WTERMSIG (w
);
3299 /* Suppress warning if the table has const char *. */
3300 signame
= (char *) sys_siglist
[code
];
3302 signame
= sys_errlist
[code
];
3306 signame
= "unknown";
3308 synch_process_death
= signame
;
3311 /* Tell wait_reading_process_input that it needs to wake up and
3313 if (input_available_clear_time
)
3314 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3317 /* On some systems, we must return right away.
3318 If any more processes want to signal us, we will
3320 Otherwise (on systems that have WNOHANG), loop around
3321 to use up all the processes that have something to tell us. */
3322 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT)
3324 signal (signo
, sigchld_handler
);
3328 #endif /* USG, but not HPUX with WNOHANG */
3334 exec_sentinel_unwind (data
)
3337 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
3342 exec_sentinel_error_handler (error
)
3345 cmd_error_internal (error
, "error in process sentinel: ");
3347 update_echo_area ();
3348 Fsleep_for (make_number (2), Qnil
);
3352 exec_sentinel (proc
, reason
)
3353 Lisp_Object proc
, reason
;
3355 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
3356 register struct Lisp_Process
*p
= XPROCESS (proc
);
3357 int count
= specpdl_ptr
- specpdl
;
3359 /* No need to gcpro these, because all we do with them later
3360 is test them for EQness, and none of them should be a string. */
3361 odeactivate
= Vdeactivate_mark
;
3362 XSETBUFFER (obuffer
, current_buffer
);
3363 okeymap
= current_buffer
->keymap
;
3365 sentinel
= p
->sentinel
;
3366 if (NILP (sentinel
))
3369 /* Zilch the sentinel while it's running, to avoid recursive invocations;
3370 assure that it gets restored no matter how the sentinel exits. */
3372 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
3373 /* Inhibit quit so that random quits don't screw up a running filter. */
3374 specbind (Qinhibit_quit
, Qt
);
3375 specbind (Qlast_nonmenu_event
, Qt
);
3377 running_asynch_code
= 1;
3378 internal_condition_case_1 (read_process_output_call
,
3380 Fcons (proc
, Fcons (reason
, Qnil
))),
3381 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
3382 exec_sentinel_error_handler
);
3383 running_asynch_code
= 0;
3384 restore_match_data ();
3386 Vdeactivate_mark
= odeactivate
;
3387 if (! EQ (Fcurrent_buffer (), obuffer
)
3388 || ! EQ (current_buffer
->keymap
, okeymap
))
3389 record_asynch_buffer_change ();
3391 if (waiting_for_user_input_p
)
3392 prepare_menu_bars ();
3393 unbind_to (count
, Qnil
);
3396 /* Report all recent events of a change in process status
3397 (either run the sentinel or output a message).
3398 This is done while Emacs is waiting for keyboard input. */
3402 register Lisp_Object proc
, buffer
;
3403 Lisp_Object tail
, msg
;
3404 struct gcpro gcpro1
, gcpro2
;
3408 /* We need to gcpro tail; if read_process_output calls a filter
3409 which deletes a process and removes the cons to which tail points
3410 from Vprocess_alist, and then causes a GC, tail is an unprotected
3414 /* Set this now, so that if new processes are created by sentinels
3415 that we run, we get called again to handle their status changes. */
3416 update_tick
= process_tick
;
3418 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
3421 register struct Lisp_Process
*p
;
3423 proc
= Fcdr (Fcar (tail
));
3424 p
= XPROCESS (proc
);
3426 if (XINT (p
->tick
) != XINT (p
->update_tick
))
3428 XSETINT (p
->update_tick
, XINT (p
->tick
));
3430 /* If process is still active, read any output that remains. */
3431 if (XINT (p
->infd
) >= 0)
3432 while (! EQ (p
->filter
, Qt
)
3433 && read_process_output (proc
, XINT (p
->infd
)) > 0);
3437 /* Get the text to use for the message. */
3438 if (!NILP (p
->raw_status_low
))
3440 msg
= status_message (p
->status
);
3442 /* If process is terminated, deactivate it or delete it. */
3444 if (CONSP (p
->status
))
3445 symbol
= XCONS (p
->status
)->car
;
3447 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
3448 || EQ (symbol
, Qclosed
))
3450 if (delete_exited_processes
)
3451 remove_process (proc
);
3453 deactivate_process (proc
);
3456 /* Now output the message suitably. */
3457 if (!NILP (p
->sentinel
))
3458 exec_sentinel (proc
, msg
);
3459 /* Don't bother with a message in the buffer
3460 when a process becomes runnable. */
3461 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
3463 Lisp_Object ro
, tem
;
3464 struct buffer
*old
= current_buffer
;
3467 ro
= XBUFFER (buffer
)->read_only
;
3469 /* Avoid error if buffer is deleted
3470 (probably that's why the process is dead, too) */
3471 if (NILP (XBUFFER (buffer
)->name
))
3473 Fset_buffer (buffer
);
3475 /* Insert new output into buffer
3476 at the current end-of-output marker,
3477 thus preserving logical ordering of input and output. */
3478 if (XMARKER (p
->mark
)->buffer
)
3479 SET_PT (marker_position (p
->mark
));
3482 if (point
<= opoint
)
3483 opoint
+= XSTRING (msg
)->size
+ XSTRING (p
->name
)->size
+ 10;
3485 tem
= current_buffer
->read_only
;
3486 current_buffer
->read_only
= Qnil
;
3487 insert_string ("\nProcess ");
3488 Finsert (1, &p
->name
);
3489 insert_string (" ");
3491 current_buffer
->read_only
= tem
;
3492 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
3495 set_buffer_internal (old
);
3500 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
3501 redisplay_preserve_echo_area ();
3506 /* The first time this is called, assume keyboard input comes from DESC
3507 instead of from where we used to expect it.
3508 Subsequent calls mean assume input keyboard can come from DESC
3509 in addition to other places. */
3511 static int add_keyboard_wait_descriptor_called_flag
;
3514 add_keyboard_wait_descriptor (desc
)
3517 if (! add_keyboard_wait_descriptor_called_flag
)
3518 FD_CLR (0, &input_wait_mask
);
3519 add_keyboard_wait_descriptor_called_flag
= 1;
3520 FD_SET (desc
, &input_wait_mask
);
3521 if (desc
> max_keyboard_desc
)
3522 max_keyboard_desc
= desc
;
3525 /* From now on, do not expect DESC to give keyboard input. */
3528 delete_keyboard_wait_descriptor (desc
)
3532 int lim
= max_keyboard_desc
;
3534 FD_CLR (desc
, &input_wait_mask
);
3536 if (desc
== max_keyboard_desc
)
3537 for (fd
= 0; fd
< lim
; fd
++)
3538 if (FD_ISSET (fd
, &input_wait_mask
)
3539 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3540 max_keyboard_desc
= fd
;
3543 /* Return nonzero if *MASK has a bit set
3544 that corresponds to one of the keyboard input descriptors. */
3547 keyboard_bit_set (mask
)
3552 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
3553 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
3554 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3566 if (! noninteractive
|| initialized
)
3568 signal (SIGCHLD
, sigchld_handler
);
3571 FD_ZERO (&input_wait_mask
);
3572 FD_ZERO (&non_keyboard_wait_mask
);
3573 max_process_desc
= 0;
3575 FD_SET (0, &input_wait_mask
);
3577 Vprocess_alist
= Qnil
;
3578 for (i
= 0; i
< MAXDESC
; i
++)
3580 chan_process
[i
] = Qnil
;
3581 proc_buffered_char
[i
] = -1;
3588 stream_process
= intern ("stream");
3590 Qprocessp
= intern ("processp");
3591 staticpro (&Qprocessp
);
3592 Qrun
= intern ("run");
3594 Qstop
= intern ("stop");
3596 Qsignal
= intern ("signal");
3597 staticpro (&Qsignal
);
3599 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
3602 Qexit = intern ("exit");
3603 staticpro (&Qexit); */
3605 Qopen
= intern ("open");
3607 Qclosed
= intern ("closed");
3608 staticpro (&Qclosed
);
3610 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
3611 staticpro (&Qlast_nonmenu_event
);
3613 staticpro (&Vprocess_alist
);
3615 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
3616 "*Non-nil means delete processes immediately when they exit.\n\
3617 nil means don't delete them until `list-processes' is run.");
3619 delete_exited_processes
= 1;
3621 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
3622 "Control type of device used to communicate with subprocesses.\n\
3623 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
3624 The value has no effect if the system has no ptys or if all ptys are busy:\n\
3625 then a pipe is used in any case.\n\
3626 The value takes effect when `start-process' is called.");
3627 Vprocess_connection_type
= Qt
;
3629 defsubr (&Sprocessp
);
3630 defsubr (&Sget_process
);
3631 defsubr (&Sget_buffer_process
);
3632 defsubr (&Sdelete_process
);
3633 defsubr (&Sprocess_status
);
3634 defsubr (&Sprocess_exit_status
);
3635 defsubr (&Sprocess_id
);
3636 defsubr (&Sprocess_name
);
3637 defsubr (&Sprocess_tty_name
);
3638 defsubr (&Sprocess_command
);
3639 defsubr (&Sset_process_buffer
);
3640 defsubr (&Sprocess_buffer
);
3641 defsubr (&Sprocess_mark
);
3642 defsubr (&Sset_process_filter
);
3643 defsubr (&Sprocess_filter
);
3644 defsubr (&Sset_process_sentinel
);
3645 defsubr (&Sset_process_window_size
);
3646 defsubr (&Sprocess_sentinel
);
3647 defsubr (&Sprocess_kill_without_query
);
3648 defsubr (&Slist_processes
);
3649 defsubr (&Sprocess_list
);
3650 defsubr (&Sstart_process
);
3652 defsubr (&Sopen_network_stream
);
3653 #endif /* HAVE_SOCKETS */
3654 defsubr (&Saccept_process_output
);
3655 defsubr (&Sprocess_send_region
);
3656 defsubr (&Sprocess_send_string
);
3657 defsubr (&Sinterrupt_process
);
3658 defsubr (&Skill_process
);
3659 defsubr (&Squit_process
);
3660 defsubr (&Sstop_process
);
3661 defsubr (&Scontinue_process
);
3662 defsubr (&Sprocess_send_eof
);
3663 defsubr (&Ssignal_process
);
3664 defsubr (&Swaiting_for_user_input_p
);
3665 /* defsubr (&Sprocess_connection); */
3669 #else /* not subprocesses */
3671 #include <sys/types.h>
3675 #include "systime.h"
3676 #include "termopts.h"
3677 #include "sysselect.h"
3679 extern int frame_garbaged
;
3682 /* As described above, except assuming that there are no subprocesses:
3684 Wait for timeout to elapse and/or keyboard input to be available.
3687 timeout in seconds, or
3688 zero for no limit, or
3689 -1 means gobble data immediately available but don't wait for any.
3691 read_kbd is a Lisp_Object:
3692 0 to ignore keyboard input, or
3693 1 to return when input is available, or
3694 -1 means caller will actually read the input, so don't throw to
3696 We know that read_kbd will never be a Lisp_Process, since
3697 `subprocesses' isn't defined.
3699 do_display != 0 means redisplay should be done to show subprocess
3700 output that arrives.
3702 Return true iff we received input from any process. */
3705 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
3706 int time_limit
, microsecs
;
3707 Lisp_Object read_kbd
;
3710 EMACS_TIME end_time
, timeout
, *timeout_p
;
3713 /* What does time_limit really mean? */
3714 if (time_limit
|| microsecs
)
3716 /* It's not infinite. */
3717 timeout_p
= &timeout
;
3719 if (time_limit
== -1)
3720 /* In fact, it's zero. */
3721 EMACS_SET_SECS_USECS (timeout
, 0, 0);
3723 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
3725 /* How far in the future is that? */
3726 EMACS_GET_TIME (end_time
);
3727 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
3730 /* It's infinite. */
3733 /* This must come before stop_polling. */
3734 prepare_menu_bars ();
3736 /* Turn off periodic alarms (in case they are in use)
3737 because the select emulator uses alarms. */
3744 waitchannels
= XINT (read_kbd
) ? 1 : 0;
3746 /* If calling from keyboard input, do not quit
3747 since we want to return C-g as an input character.
3748 Otherwise, do pending quit if requested. */
3749 if (XINT (read_kbd
) >= 0)
3754 EMACS_GET_TIME (*timeout_p
);
3755 EMACS_SUB_TIME (*timeout_p
, end_time
, *timeout_p
);
3756 if (EMACS_TIME_NEG_P (*timeout_p
))
3760 /* Cause C-g and alarm signals to take immediate action,
3761 and cause input available signals to zero out timeout. */
3762 if (XINT (read_kbd
) < 0)
3763 set_waiting_for_input (&timeout
);
3765 /* If a frame has been newly mapped and needs updating,
3766 reprocess its display stuff. */
3767 if (frame_garbaged
&& do_display
)
3768 redisplay_preserve_echo_area ();
3770 if (XINT (read_kbd
) && detect_input_pending ())
3773 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
3776 /* Make C-g and alarm signals set flags again */
3777 clear_waiting_for_input ();
3779 /* If we woke up due to SIGWINCH, actually change size now. */
3780 do_pending_window_change ();
3784 /* If the system call was interrupted, then go around the
3790 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
3791 /* System sometimes fails to deliver SIGIO. */
3792 kill (getpid (), SIGIO
);
3795 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
3799 /* If we have timed out (nfds == 0) or found some input (nfds > 0),
3811 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
3812 /* Don't confuse make-docfile by having two doc strings for this function.
3813 make-docfile does not pay attention to #if, for good reason! */
3816 register Lisp_Object name
;
3821 /* Kill all processes associated with `buffer'.
3822 If `buffer' is nil, kill all processes.
3823 Since we have no subprocesses, this does nothing. */
3825 kill_buffer_processes (buffer
)
3836 defsubr (&Sget_buffer_process
);
3840 #endif /* not subprocesses */