1 /* Asynchronous subprocess control for GNU Emacs.
2 Copyright (C) 1985, 86, 87, 88, 93, 94 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 */
45 #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */
46 #include <sys/socket.h>
48 #include <netinet/in.h>
49 #include <arpa/inet.h>
50 #endif /* HAVE_SOCKETS */
52 /* TERM is a poor-man's SLIP, used on Linux. */
57 /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */
58 #ifdef HAVE_BROKEN_INET_ADDR
59 #define IN_ADDR struct in_addr
60 #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1)
62 #define IN_ADDR unsigned long
63 #define NUMERIC_ADDR_ERROR (numeric_addr == -1)
66 #if defined(BSD) || defined(STRIDE)
67 #include <sys/ioctl.h>
68 #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5)
70 #endif /* HAVE_PTYS and no O_NDELAY */
71 #endif /* BSD or STRIDE */
73 #ifdef BROKEN_O_NONBLOCK
75 #endif /* BROKEN_O_NONBLOCK */
82 #include <sys/sysmacros.h> /* for "minor" */
92 #include "termhooks.h"
97 Lisp_Object Qprocessp
;
98 Lisp_Object Qrun
, Qstop
, Qsignal
, Qopen
, Qclosed
;
99 Lisp_Object Qlast_nonmenu_event
;
100 /* Qexit is declared and initialized in eval.c. */
102 /* a process object is a network connection when its childp field is neither
103 Qt nor Qnil but is instead a string (name of foreign host we
104 are connected to + name of port we are connected to) */
107 static Lisp_Object stream_process
;
109 #define NETCONN_P(p) (XGCTYPE (XPROCESS (p)->childp) == Lisp_String)
111 #define NETCONN_P(p) 0
112 #endif /* HAVE_SOCKETS */
114 /* Define first descriptor number available for subprocesses. */
116 #define FIRST_PROC_DESC 1
118 #define FIRST_PROC_DESC 3
121 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
124 #if !defined (SIGCHLD) && defined (SIGCLD)
125 #define SIGCHLD SIGCLD
128 #include "syssignal.h"
133 extern char *strerror ();
135 extern char *sys_errlist
[];
142 #ifndef SYS_SIGLIST_DECLARED
146 extern char *sys_siglist
[];
147 #endif /* not LINUX */
149 char *sys_siglist
[] =
155 "illegal instruction",
159 "floating point exception",
162 "segmentation violation",
163 "bad argument to system call",
164 "write on a pipe with no one to read it",
166 "software termination signal from kill",
168 "sendable stop signal not from tty",
169 "stop signal from tty",
170 "continue a stopped process",
171 "child status has changed",
172 "background read attempted from control tty",
173 "background write attempted from control tty",
174 "input record available at control tty",
175 "exceeded CPU time limit",
176 "exceeded file size limit"
180 #endif /* ! SYS_SIGLIST_DECLARED */
182 /* t means use pty, nil means use a pipe,
183 maybe other values to come. */
184 static Lisp_Object Vprocess_connection_type
;
188 #include <sys/socket.h>
192 /* Number of events of change of status of a process. */
193 static int process_tick
;
195 /* Number of events for which the user or sentinel has been notified. */
196 static int update_tick
;
199 /* We could get this from param.h, but better not to depend on finding that.
200 And better not to risk that it might define other symbols used in this
203 #define MAXDESC FD_SETSIZE
207 #define SELECT_TYPE fd_set
208 #else /* no FD_SET */
210 #define SELECT_TYPE int
212 /* Define the macros to access a single-int bitmap of descriptors. */
213 #define FD_SET(n, p) (*(p) |= (1 << (n)))
214 #define FD_CLR(n, p) (*(p) &= ~(1 << (n)))
215 #define FD_ISSET(n, p) (*(p) & (1 << (n)))
216 #define FD_ZERO(p) (*(p) = 0)
217 #endif /* no FD_SET */
219 /* If we support X Windows, turn on the code to poll periodically
220 to detect C-g. It isn't actually used when doing interrupt input. */
221 #ifdef HAVE_X_WINDOWS
222 #define POLL_FOR_INPUT
225 /* Mask of bits indicating the descriptors that we wait for input on. */
227 static SELECT_TYPE input_wait_mask
;
229 /* Mask that excludes keyboard input descriptor (s). */
231 static SELECT_TYPE non_keyboard_wait_mask
;
233 /* The largest descriptor currently in use for a process object. */
234 static int max_process_desc
;
236 /* The largest descriptor currently in use for keyboard input. */
237 static int max_keyboard_desc
;
239 /* Nonzero means delete a process right away if it exits. */
240 static int delete_exited_processes
;
242 /* Indexed by descriptor, gives the process (if any) for that descriptor */
243 Lisp_Object chan_process
[MAXDESC
];
245 /* Alist of elements (NAME . PROCESS) */
246 Lisp_Object Vprocess_alist
;
248 /* Buffered-ahead input char from process, indexed by channel.
249 -1 means empty (no char is buffered).
250 Used on sys V where the only way to tell if there is any
251 output from the process is to read at least one char.
252 Always -1 on systems that support FIONREAD. */
254 static int proc_buffered_char
[MAXDESC
];
256 static Lisp_Object
get_process ();
258 /* Maximum number of bytes to send to a pty without an eof. */
259 static int pty_max_bytes
;
261 /* Open an available pty, returning a file descriptor.
262 Return -1 on failure.
263 The file name of the terminal corresponding to the pty
264 is left in the variable pty_name. */
266 static char pty_name
[24];
268 /* Compute the Lisp form of the process status, p->status, from
269 the numeric status that was returned by `wait'. */
271 Lisp_Object
status_convert ();
274 struct Lisp_Process
*p
;
276 union { int i
; WAITTYPE wt
; } u
;
277 u
.i
= XFASTINT (p
->raw_status_low
) + (XFASTINT (p
->raw_status_high
) << 16);
278 p
->status
= status_convert (u
.wt
);
279 p
->raw_status_low
= Qnil
;
280 p
->raw_status_high
= Qnil
;
283 /* Convert a process status word in Unix format to
284 the list that we use internally. */
291 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
292 else if (WIFEXITED (w
))
293 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
294 WCOREDUMP (w
) ? Qt
: Qnil
));
295 else if (WIFSIGNALED (w
))
296 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
297 WCOREDUMP (w
) ? Qt
: Qnil
));
302 /* Given a status-list, extract the three pieces of information
303 and store them individually through the three pointers. */
306 decode_status (l
, symbol
, code
, coredump
)
322 *symbol
= XCONS (l
)->car
;
323 tem
= XCONS (l
)->cdr
;
324 *code
= XFASTINT (XCONS (tem
)->car
);
325 tem
= XCONS (tem
)->cdr
;
326 *coredump
= !NILP (tem
);
330 /* Return a string describing a process status list. */
333 status_message (status
)
338 Lisp_Object string
, string2
;
340 decode_status (status
, &symbol
, &code
, &coredump
);
342 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
348 signame
= sys_siglist
[code
];
350 signame
= sys_errlist
[code
];
355 string
= build_string (signame
);
356 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
357 XSTRING (string
)->data
[0] = DOWNCASE (XSTRING (string
)->data
[0]);
358 return concat2 (string
, string2
);
360 else if (EQ (symbol
, Qexit
))
363 return build_string ("finished\n");
364 string
= Fnumber_to_string (make_number (code
));
365 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
366 return concat2 (build_string ("exited abnormally with code "),
367 concat2 (string
, string2
));
370 return Fcopy_sequence (Fsymbol_name (symbol
));
382 /* Some systems name their pseudoterminals so that there are gaps in
383 the usual sequence - for example, on HP9000/S700 systems, there
384 are no pseudoterminals with names ending in 'f'. So we wait for
385 three failures in a row before deciding that we've reached the
387 int failed_count
= 0;
392 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
393 for (i
= 0; i
< 16; i
++)
396 #ifdef PTY_NAME_SPRINTF
399 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
400 #endif /* no PTY_NAME_SPRINTF */
404 #else /* no PTY_OPEN */
406 /* Unusual IRIS code */
407 *ptyv
= open ("/dev/ptc", O_RDWR
| O_NDELAY
, 0);
410 if (fstat (fd
, &stb
) < 0)
413 if (stat (pty_name
, &stb
) < 0)
416 if (failed_count
>= 3)
422 fd
= open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
424 fd
= open (pty_name
, O_RDWR
| O_NDELAY
, 0);
426 #endif /* not IRIS */
427 #endif /* no PTY_OPEN */
431 /* check to make certain that both sides are available
432 this avoids a nasty yet stupid bug in rlogins */
433 #ifdef PTY_TTY_NAME_SPRINTF
436 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
437 #endif /* no PTY_TTY_NAME_SPRINTF */
439 if (access (pty_name
, 6) != 0)
442 #if !defined(IRIS) && !defined(__sgi)
448 #endif /* not UNIPLUS */
455 #endif /* HAVE_PTYS */
461 register Lisp_Object val
, tem
, name1
;
462 register struct Lisp_Process
*p
;
466 /* size of process structure includes the vector header,
467 so deduct for that. But struct Lisp_Vector includes the first
468 element, thus deducts too much, so add it back. */
469 val
= Fmake_vector (make_number ((sizeof (struct Lisp_Process
)
470 - sizeof (struct Lisp_Vector
)
471 + sizeof (Lisp_Object
))
472 / sizeof (Lisp_Object
)),
474 XSETTYPE (val
, Lisp_Process
);
477 XSETINT (p
->infd
, -1);
478 XSETINT (p
->outfd
, -1);
479 XSETFASTINT (p
->pid
, 0);
480 XSETFASTINT (p
->tick
, 0);
481 XSETFASTINT (p
->update_tick
, 0);
482 p
->raw_status_low
= Qnil
;
483 p
->raw_status_high
= Qnil
;
485 p
->mark
= Fmake_marker ();
487 /* If name is already in use, modify it until it is unused. */
492 tem
= Fget_process (name1
);
493 if (NILP (tem
)) break;
494 sprintf (suffix
, "<%d>", i
);
495 name1
= concat2 (name
, build_string (suffix
));
499 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
503 remove_process (proc
)
504 register Lisp_Object proc
;
506 register Lisp_Object pair
;
508 pair
= Frassq (proc
, Vprocess_alist
);
509 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
510 Fset_marker (XPROCESS (proc
)->mark
, Qnil
, Qnil
);
512 deactivate_process (proc
);
515 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
516 "Return t if OBJECT is a process.")
520 return PROCESSP (obj
) ? Qt
: Qnil
;
523 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
524 "Return the process named NAME, or nil if there is none.")
526 register Lisp_Object name
;
530 CHECK_STRING (name
, 0);
531 return Fcdr (Fassoc (name
, Vprocess_alist
));
534 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
535 "Return the (or, a) process associated with BUFFER.\n\
536 BUFFER may be a buffer or the name of one.")
538 register Lisp_Object name
;
540 register Lisp_Object buf
, tail
, proc
;
542 if (NILP (name
)) return Qnil
;
543 buf
= Fget_buffer (name
);
544 if (NILP (buf
)) return Qnil
;
546 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
548 proc
= Fcdr (Fcar (tail
));
549 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
555 /* This is how commands for the user decode process arguments. It
556 accepts a process, a process name, a buffer, a buffer name, or nil.
557 Buffers denote the first process in the buffer, and nil denotes the
562 register Lisp_Object name
;
564 register Lisp_Object proc
, obj
;
567 obj
= Fget_process (name
);
569 obj
= Fget_buffer (name
);
571 error ("Process %s does not exist", XSTRING (name
)->data
);
573 else if (NILP (name
))
574 obj
= Fcurrent_buffer ();
578 /* Now obj should be either a buffer object or a process object.
582 proc
= Fget_buffer_process (obj
);
584 error ("Buffer %s has no process", XSTRING (XBUFFER (obj
)->name
)->data
);
588 CHECK_PROCESS (obj
, 0);
594 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
595 "Delete PROCESS: kill it and forget about it immediately.\n\
596 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
597 nil, indicating the current buffer's process.")
599 register Lisp_Object proc
;
601 proc
= get_process (proc
);
602 XPROCESS (proc
)->raw_status_low
= Qnil
;
603 XPROCESS (proc
)->raw_status_high
= Qnil
;
604 if (NETCONN_P (proc
))
606 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
607 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
609 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
611 Fkill_process (proc
, Qnil
);
612 /* Do this now, since remove_process will make sigchld_handler do nothing. */
613 XPROCESS (proc
)->status
614 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
615 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
618 remove_process (proc
);
622 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
623 "Return the status of PROCESS: a symbol, one of these:\n\
624 run -- for a process that is running.\n\
625 stop -- for a process stopped but continuable.\n\
626 exit -- for a process that has exited.\n\
627 signal -- for a process that has got a fatal signal.\n\
628 open -- for a network stream connection that is open.\n\
629 closed -- for a network stream connection that is closed.\n\
630 nil -- if arg is a process name and no such process exists.\n\
631 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
632 nil, indicating the current buffer's process.")
634 register Lisp_Object proc
;
636 register struct Lisp_Process
*p
;
637 register Lisp_Object status
;
640 proc
= Fget_process (proc
);
642 proc
= get_process (proc
);
648 if (!NILP (p
->raw_status_low
))
652 status
= XCONS (status
)->car
;
653 if (NETCONN_P (proc
))
655 if (EQ (status
, Qrun
))
657 else if (EQ (status
, Qexit
))
663 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
665 "Return the exit status of PROCESS or the signal number that killed it.\n\
666 If PROCESS has not yet exited or died, return 0.")
668 register Lisp_Object proc
;
670 CHECK_PROCESS (proc
, 0);
671 if (!NILP (XPROCESS (proc
)->raw_status_low
))
672 update_status (XPROCESS (proc
));
673 if (CONSP (XPROCESS (proc
)->status
))
674 return XCONS (XCONS (XPROCESS (proc
)->status
)->cdr
)->car
;
675 return make_number (0);
678 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
679 "Return the process id of PROCESS.\n\
680 This is the pid of the Unix process which PROCESS uses or talks to.\n\
681 For a network connection, this value is nil.")
683 register Lisp_Object proc
;
685 CHECK_PROCESS (proc
, 0);
686 return XPROCESS (proc
)->pid
;
689 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
690 "Return the name of PROCESS, as a string.\n\
691 This is the name of the program invoked in PROCESS,\n\
692 possibly modified to make it unique among process names.")
694 register Lisp_Object proc
;
696 CHECK_PROCESS (proc
, 0);
697 return XPROCESS (proc
)->name
;
700 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
701 "Return the command that was executed to start PROCESS.\n\
702 This is a list of strings, the first string being the program executed\n\
703 and the rest of the strings being the arguments given to it.\n\
704 For a non-child channel, this is nil.")
706 register Lisp_Object proc
;
708 CHECK_PROCESS (proc
, 0);
709 return XPROCESS (proc
)->command
;
712 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
713 "Return the name of the terminal PROCESS uses, or nil if none.\n\
714 This is the terminal that the process itself reads and writes on,\n\
715 not the name of the pty that Emacs uses to talk with that terminal.")
717 register Lisp_Object proc
;
719 CHECK_PROCESS (proc
, 0);
720 return XPROCESS (proc
)->tty_name
;
723 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
725 "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).")
727 register Lisp_Object proc
, buffer
;
729 CHECK_PROCESS (proc
, 0);
731 CHECK_BUFFER (buffer
, 1);
732 XPROCESS (proc
)->buffer
= buffer
;
736 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
738 "Return the buffer PROCESS is associated with.\n\
739 Output from PROCESS is inserted in this buffer\n\
740 unless PROCESS has a filter.")
742 register Lisp_Object proc
;
744 CHECK_PROCESS (proc
, 0);
745 return XPROCESS (proc
)->buffer
;
748 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
750 "Return the marker for the end of the last output from PROCESS.")
752 register Lisp_Object proc
;
754 CHECK_PROCESS (proc
, 0);
755 return XPROCESS (proc
)->mark
;
758 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
760 "Give PROCESS the filter function FILTER; nil means no filter.\n\
761 t means stop accepting output from the process.\n\
762 When a process has a filter, each time it does output\n\
763 the entire string of output is passed to the filter.\n\
764 The filter gets two arguments: the process and the string of output.\n\
765 If the process has a filter, its buffer is not used for output.")
767 register Lisp_Object proc
, filter
;
769 CHECK_PROCESS (proc
, 0);
772 FD_CLR (XINT (XPROCESS (proc
)->infd
), &input_wait_mask
);
773 FD_CLR (XINT (XPROCESS (proc
)->infd
), &non_keyboard_wait_mask
);
775 else if (EQ (XPROCESS (proc
)->filter
, Qt
))
777 FD_SET (XINT (XPROCESS (proc
)->infd
), &input_wait_mask
);
778 FD_SET (XINT (XPROCESS (proc
)->infd
), &non_keyboard_wait_mask
);
780 XPROCESS (proc
)->filter
= filter
;
784 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
786 "Returns the filter function of PROCESS; nil if none.\n\
787 See `set-process-filter' for more info on filter functions.")
789 register Lisp_Object proc
;
791 CHECK_PROCESS (proc
, 0);
792 return XPROCESS (proc
)->filter
;
795 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
797 "Give PROCESS the sentinel SENTINEL; nil for none.\n\
798 The sentinel is called as a function when the process changes state.\n\
799 It gets two arguments: the process, and a string describing the change.")
801 register Lisp_Object proc
, sentinel
;
803 CHECK_PROCESS (proc
, 0);
804 XPROCESS (proc
)->sentinel
= sentinel
;
808 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
810 "Return the sentinel of PROCESS; nil if none.\n\
811 See `set-process-sentinel' for more info on sentinels.")
813 register Lisp_Object proc
;
815 CHECK_PROCESS (proc
, 0);
816 return XPROCESS (proc
)->sentinel
;
819 DEFUN ("set-process-window-size", Fset_process_window_size
,
820 Sset_process_window_size
, 3, 3, 0,
821 "Tell PROCESS that it has logical window size HEIGHT and WIDTH.")
822 (proc
, height
, width
)
823 register Lisp_Object proc
, height
, width
;
825 CHECK_PROCESS (proc
, 0);
826 CHECK_NATNUM (height
, 0);
827 CHECK_NATNUM (width
, 0);
828 if (set_window_size (XINT (XPROCESS (proc
)->infd
),
829 XINT (height
), XINT(width
)) <= 0)
835 DEFUN ("process-kill-without-query", Fprocess_kill_without_query
,
836 Sprocess_kill_without_query
, 1, 2, 0,
837 "Say no query needed if PROCESS is running when Emacs is exited.\n\
838 Optional second argument if non-nil says to require a query.\n\
839 Value is t if a query was formerly required.")
841 register Lisp_Object proc
, value
;
845 CHECK_PROCESS (proc
, 0);
846 tem
= XPROCESS (proc
)->kill_without_query
;
847 XPROCESS (proc
)->kill_without_query
= Fnull (value
);
852 #if 0 /* Turned off because we don't currently record this info
853 in the process. Perhaps add it. */
854 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
855 "Return the connection type of `PROCESS'.\n\
856 The value is `nil' for a pipe,\n\
857 `t' or `pty' for a pty, or `stream' for a socket connection.")
861 return XPROCESS (process
)->type
;
868 register Lisp_Object tail
, tem
;
869 Lisp_Object proc
, minspace
, tem1
;
870 register struct buffer
*old
= current_buffer
;
871 register struct Lisp_Process
*p
;
875 XSETFASTINT (minspace
, 1);
877 set_buffer_internal (XBUFFER (Vstandard_output
));
878 Fbuffer_disable_undo (Vstandard_output
);
880 current_buffer
->truncate_lines
= Qt
;
883 Proc Status Buffer Command\n\
884 ---- ------ ------ -------\n", -1);
886 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
890 proc
= Fcdr (Fcar (tail
));
892 if (NILP (p
->childp
))
895 Finsert (1, &p
->name
);
896 Findent_to (make_number (13), minspace
);
898 if (!NILP (p
->raw_status_low
))
901 if (CONSP (p
->status
))
902 symbol
= XCONS (p
->status
)->car
;
905 if (EQ (symbol
, Qsignal
))
908 tem
= Fcar (Fcdr (p
->status
));
910 if (XINT (tem
) < NSIG
)
911 write_string (sys_errlist
[XINT (tem
)], -1);
914 Fprinc (symbol
, Qnil
);
916 else if (NETCONN_P (proc
))
918 if (EQ (symbol
, Qrun
))
919 write_string ("open", -1);
920 else if (EQ (symbol
, Qexit
))
921 write_string ("closed", -1);
923 Fprinc (symbol
, Qnil
);
926 Fprinc (symbol
, Qnil
);
928 if (EQ (symbol
, Qexit
))
931 tem
= Fcar (Fcdr (p
->status
));
934 sprintf (tembuf
, " %d", XFASTINT (tem
));
935 write_string (tembuf
, -1);
939 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
940 remove_process (proc
);
942 Findent_to (make_number (22), minspace
);
943 if (NILP (p
->buffer
))
944 insert_string ("(none)");
945 else if (NILP (XBUFFER (p
->buffer
)->name
))
946 insert_string ("(Killed)");
948 Finsert (1, &XBUFFER (p
->buffer
)->name
);
950 Findent_to (make_number (37), minspace
);
952 if (NETCONN_P (proc
))
954 sprintf (tembuf
, "(network stream connection to %s)\n",
955 XSTRING (p
->childp
)->data
);
956 insert_string (tembuf
);
970 insert_string ("\n");
976 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 0, "",
977 "Display a list of all processes.\n\
978 \(Any processes listed as Exited or Signaled are actually eliminated\n\
979 after the listing is made.)")
982 internal_with_output_to_temp_buffer ("*Process List*",
983 list_processes_1
, Qnil
);
987 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
988 "Return a list of all processes.")
991 return Fmapcar (Qcdr
, Vprocess_alist
);
994 /* Starting asynchronous inferior processes. */
996 static Lisp_Object
start_process_unwind ();
998 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
999 "Start a program in a subprocess. Return the process object for it.\n\
1000 Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\
1001 NAME is name for process. It is modified if necessary to make it unique.\n\
1002 BUFFER is the buffer or (buffer-name) to associate with the process.\n\
1003 Process output goes at end of that buffer, unless you specify\n\
1004 an output stream or filter function to handle the output.\n\
1005 BUFFER may be also nil, meaning that this process is not associated\n\
1007 Third arg is program file name. It is searched for as in the shell.\n\
1008 Remaining arguments are strings to give program as arguments.")
1011 register Lisp_Object
*args
;
1013 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1015 register unsigned char *new_argv
;
1018 register unsigned char **new_argv
;
1021 int count
= specpdl_ptr
- specpdl
;
1025 buffer
= Fget_buffer_create (buffer
);
1027 /* Make sure that the child will be able to chdir to the current
1028 buffer's current directory, or its unhandled equivalent. We
1029 can't just have the child check for an error when it does the
1030 chdir, since it's in a vfork.
1032 We have to GCPRO around this because Fexpand_file_name and
1033 Funhandled_file_name_directory might call a file name handling
1034 function. The argument list is protected by the caller, so all
1035 we really have to worry about is buffer. */
1037 struct gcpro gcpro1
, gcpro2
;
1039 current_dir
= current_buffer
->directory
;
1041 GCPRO2 (buffer
, current_dir
);
1044 expand_and_dir_to_file
1045 (Funhandled_file_name_directory (current_dir
), Qnil
);
1046 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1047 report_file_error ("Setting current directory",
1048 Fcons (current_buffer
->directory
, Qnil
));
1054 CHECK_STRING (name
, 0);
1058 CHECK_STRING (program
, 2);
1061 /* Make a one member argv with all args concatenated
1062 together separated by a blank. */
1063 len
= XSTRING (program
)->size
+ 2;
1064 for (i
= 3; i
< nargs
; i
++)
1067 CHECK_STRING (tem
, i
);
1068 len
+= XSTRING (tem
)->size
+ 1; /* count the blank */
1070 new_argv
= (unsigned char *) alloca (len
);
1071 strcpy (new_argv
, XSTRING (program
)->data
);
1072 for (i
= 3; i
< nargs
; i
++)
1075 CHECK_STRING (tem
, i
);
1076 strcat (new_argv
, " ");
1077 strcat (new_argv
, XSTRING (tem
)->data
);
1079 /* Need to add code here to check for program existence on VMS */
1082 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1084 /* If program file name is not absolute, search our path for it */
1085 if (XSTRING (program
)->data
[0] != '/')
1087 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1090 GCPRO4 (name
, program
, buffer
, current_dir
);
1091 openp (Vexec_path
, program
, EXEC_SUFFIXES
, &tem
, 1);
1094 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1095 new_argv
[0] = XSTRING (tem
)->data
;
1098 new_argv
[0] = XSTRING (program
)->data
;
1100 for (i
= 3; i
< nargs
; i
++)
1103 CHECK_STRING (tem
, i
);
1104 new_argv
[i
- 2] = XSTRING (tem
)->data
;
1106 new_argv
[i
- 2] = 0;
1107 #endif /* not VMS */
1109 proc
= make_process (name
);
1110 /* If an error occurs and we can't start the process, we want to
1111 remove it from the process list. This means that each error
1112 check in create_process doesn't need to call remove_process
1113 itself; it's all taken care of here. */
1114 record_unwind_protect (start_process_unwind
, proc
);
1116 XPROCESS (proc
)->childp
= Qt
;
1117 XPROCESS (proc
)->command_channel_p
= Qnil
;
1118 XPROCESS (proc
)->buffer
= buffer
;
1119 XPROCESS (proc
)->sentinel
= Qnil
;
1120 XPROCESS (proc
)->filter
= Qnil
;
1121 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1123 create_process (proc
, new_argv
, current_dir
);
1125 return unbind_to (count
, proc
);
1128 /* This function is the unwind_protect form for Fstart_process. If
1129 PROC doesn't have its pid set, then we know someone has signalled
1130 an error and the process wasn't started successfully, so we should
1131 remove it from the process list. */
1133 start_process_unwind (proc
)
1136 if (!PROCESSP (proc
))
1139 /* Was PROC started successfully? */
1140 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1141 remove_process (proc
);
1148 create_process_1 (signo
)
1152 /* USG systems forget handlers when they are used;
1153 must reestablish each time */
1154 signal (signo
, create_process_1
);
1158 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1161 /* Mimic blocking of signals on system V, which doesn't really have it. */
1163 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1164 int sigchld_deferred
;
1167 create_process_sigchld ()
1169 signal (SIGCHLD
, create_process_sigchld
);
1171 sigchld_deferred
= 1;
1177 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1178 create_process (process
, new_argv
, current_dir
)
1179 Lisp_Object process
;
1181 Lisp_Object current_dir
;
1183 int pid
, inchannel
, outchannel
, forkin
, forkout
;
1186 SIGTYPE (*sigchld
)();
1189 extern char **environ
;
1191 inchannel
= outchannel
= -1;
1194 if (!NILP (Vprocess_connection_type
))
1195 outchannel
= inchannel
= allocate_pty ();
1200 /* On USG systems it does not work to open the pty's tty here
1201 and then close and reopen it in the child. */
1203 /* Don't let this terminal become our controlling terminal
1204 (in case we don't have one). */
1205 forkout
= forkin
= open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1207 forkout
= forkin
= open (pty_name
, O_RDWR
, 0);
1210 report_file_error ("Opening pty", Qnil
);
1212 forkin
= forkout
= -1;
1213 #endif /* not USG */
1217 #endif /* HAVE_PTYS */
1220 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1221 report_file_error ("Opening socketpair", Qnil
);
1222 outchannel
= inchannel
= sv
[0];
1223 forkout
= forkin
= sv
[1];
1225 #else /* not SKTPAIR */
1234 #endif /* not SKTPAIR */
1237 /* Replaced by close_process_descs */
1238 set_exclusive_use (inchannel
);
1239 set_exclusive_use (outchannel
);
1242 /* Stride people say it's a mystery why this is needed
1243 as well as the O_NDELAY, but that it fails without this. */
1244 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1247 ioctl (inchannel
, FIONBIO
, &one
);
1252 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1255 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1259 /* Record this as an active process, with its channels.
1260 As a result, child_setup will close Emacs's side of the pipes. */
1261 chan_process
[inchannel
] = process
;
1262 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1263 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1264 /* Record the tty descriptor used in the subprocess. */
1266 XPROCESS (process
)->subtty
= Qnil
;
1268 XSETFASTINT (XPROCESS (process
)->subtty
, forkin
);
1269 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1270 XPROCESS (process
)->status
= Qrun
;
1272 /* Delay interrupts until we have a chance to store
1273 the new fork's pid in its process structure */
1277 #else /* not BSD4_1 */
1278 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1279 sigsetmask (sigmask (SIGCHLD
));
1280 #else /* ordinary USG */
1282 sigchld_deferred
= 0;
1283 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1285 #endif /* ordinary USG */
1286 #endif /* not BSD4_1 */
1287 #endif /* SIGCHLD */
1289 FD_SET (inchannel
, &input_wait_mask
);
1290 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1291 if (inchannel
> max_process_desc
)
1292 max_process_desc
= inchannel
;
1294 /* Until we store the proper pid, enable sigchld_handler
1295 to recognize an unknown pid as standing for this process.
1296 It is very important not to let this `marker' value stay
1297 in the table after this function has returned; if it does
1298 it might cause call-process to hang and subsequent asynchronous
1299 processes to get their return values scrambled. */
1300 XSETINT (XPROCESS (process
)->pid
, -1);
1303 /* child_setup must clobber environ on systems with true vfork.
1304 Protect it from permanent change. */
1305 char **save_environ
= environ
;
1310 int xforkin
= forkin
;
1311 int xforkout
= forkout
;
1313 #if 0 /* This was probably a mistake--it duplicates code later on,
1314 but fails to handle all the cases. */
1315 /* Make sure SIGCHLD is not blocked in the child. */
1316 sigsetmask (SIGEMPTYMASK
);
1319 /* Make the pty be the controlling terminal of the process. */
1321 /* First, disconnect its current controlling terminal. */
1323 /* We tried doing setsid only if pty_flag, but it caused
1324 process_set_signal to fail on SGI when using a pipe. */
1326 /* Make the pty's terminal the controlling terminal. */
1330 /* We ignore the return value
1331 because faith@cs.unc.edu says that is necessary on Linux. */
1332 ioctl (xforkin
, TIOCSCTTY
, 0);
1335 #else /* not HAVE_SETSID */
1337 /* It's very important to call setpgrp here and no time
1338 afterwards. Otherwise, we lose our controlling tty which
1339 is set when we open the pty. */
1342 #endif /* not HAVE_SETSID */
1343 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1344 if (pty_flag
&& xforkin
>= 0)
1347 tcgetattr (xforkin
, &t
);
1349 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1350 write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1353 #if defined (NTTYDISC) && defined (TIOCSETD)
1354 if (pty_flag
&& xforkin
>= 0)
1356 /* Use new line discipline. */
1357 int ldisc
= NTTYDISC
;
1358 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1363 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1364 can do TIOCSPGRP only to the process's controlling tty. */
1367 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1368 I can't test it since I don't have 4.3. */
1369 int j
= open ("/dev/tty", O_RDWR
, 0);
1370 ioctl (j
, TIOCNOTTY
, 0);
1373 /* In order to get a controlling terminal on some versions
1374 of BSD, it is necessary to put the process in pgrp 0
1375 before it opens the terminal. */
1379 #endif /* TIOCNOTTY */
1381 #if !defined (RTU) && !defined (UNIPLUS)
1382 /*** There is a suggestion that this ought to be a
1383 conditional on TIOCSPGRP. */
1384 /* Now close the pty (if we had it open) and reopen it.
1385 This makes the pty the controlling terminal of the subprocess. */
1388 #ifdef SET_CHILD_PTY_PGRP
1389 int pgrp
= getpid ();
1392 /* I wonder if close (open (pty_name, ...)) would work? */
1395 xforkout
= xforkin
= open (pty_name
, O_RDWR
, 0);
1397 #ifdef SET_CHILD_PTY_PGRP
1398 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1399 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1405 #endif /* not UNIPLUS and not RTU */
1406 #ifdef SETUP_SLAVE_PTY
1411 #endif /* SETUP_SLAVE_PTY */
1413 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1414 Now reenable it in the child, so it will die when we want it to. */
1416 signal (SIGHUP
, SIG_DFL
);
1418 #endif /* HAVE_PTYS */
1423 #else /* not BSD4_1 */
1424 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1425 sigsetmask (SIGEMPTYMASK
);
1426 #else /* ordinary USG */
1428 signal (SIGCHLD
, sigchld
);
1430 #endif /* ordinary USG */
1431 #endif /* not BSD4_1 */
1432 #endif /* SIGCHLD */
1434 signal (SIGINT
, SIG_DFL
);
1435 signal (SIGQUIT
, SIG_DFL
);
1438 child_setup_tty (xforkout
);
1439 child_setup (xforkin
, xforkout
, xforkout
,
1440 new_argv
, 1, current_dir
);
1442 environ
= save_environ
;
1449 if (forkin
!= forkout
&& forkout
>= 0)
1451 report_file_error ("Doing vfork", Qnil
);
1454 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
1456 /* If the subfork execv fails, and it exits,
1457 this close hangs. I don't know why.
1458 So have an interrupt jar it loose. */
1460 signal (SIGALRM
, create_process_1
);
1462 XPROCESS (process
)->subtty
= Qnil
;
1467 if (forkin
!= forkout
&& forkout
>= 0)
1470 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1475 #else /* not BSD4_1 */
1476 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1477 sigsetmask (SIGEMPTYMASK
);
1478 #else /* ordinary USG */
1480 signal (SIGCHLD
, sigchld
);
1481 /* Now really handle any of these signals
1482 that came in during this function. */
1483 if (sigchld_deferred
)
1484 kill (getpid (), SIGCHLD
);
1486 #endif /* ordinary USG */
1487 #endif /* not BSD4_1 */
1488 #endif /* SIGCHLD */
1490 #endif /* not VMS */
1494 /* open a TCP network connection to a given HOST/SERVICE. Treated
1495 exactly like a normal process when reading and writing. Only
1496 differences are in status display and process deletion. A network
1497 connection has no PID; you cannot signal it. All you can do is
1498 deactivate and close it via delete-process */
1500 DEFUN ("open-network-stream", Fopen_network_stream
, Sopen_network_stream
,
1502 "Open a TCP connection for a service to a host.\n\
1503 Returns a subprocess-object to represent the connection.\n\
1504 Input and output work as for subprocesses; `delete-process' closes it.\n\
1505 Args are NAME BUFFER HOST SERVICE.\n\
1506 NAME is name for process. It is modified if necessary to make it unique.\n\
1507 BUFFER is the buffer (or buffer-name) to associate with the process.\n\
1508 Process output goes at end of that buffer, unless you specify\n\
1509 an output stream or filter function to handle the output.\n\
1510 BUFFER may be also nil, meaning that this process is not associated\n\
1512 Third arg is name of the host to connect to, or its IP address.\n\
1513 Fourth arg SERVICE is name of the service desired, or an integer\n\
1514 specifying a port number to connect to.")
1515 (name
, buffer
, host
, service
)
1516 Lisp_Object name
, buffer
, host
, service
;
1520 struct sockaddr_in address
;
1521 struct servent
*svc_info
;
1522 struct hostent
*host_info_ptr
, host_info
;
1523 char *(addr_list
[2]);
1524 IN_ADDR numeric_addr
;
1528 struct hostent host_info_fixed
;
1529 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1531 int count
= specpdl_ptr
- specpdl
;
1533 GCPRO4 (name
, buffer
, host
, service
);
1534 CHECK_STRING (name
, 0);
1535 CHECK_STRING (host
, 0);
1536 if (INTEGERP (service
))
1537 port
= htons ((unsigned short) XINT (service
));
1540 CHECK_STRING (service
, 0);
1541 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
1543 error ("Unknown service \"%s\"", XSTRING (service
)->data
);
1544 port
= svc_info
->s_port
;
1553 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
1555 if (! (host_info_ptr
== 0 && h_errno
== TRY_AGAIN
))
1558 Fsleep_for (make_number (1), Qnil
);
1560 if (host_info_ptr
== 0)
1561 /* Attempt to interpret host as numeric inet address */
1563 numeric_addr
= inet_addr ((char *) XSTRING (host
)->data
);
1564 if (NUMERIC_ADDR_ERROR
)
1565 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
1567 host_info_ptr
= &host_info
;
1568 host_info
.h_name
= 0;
1569 host_info
.h_aliases
= 0;
1570 host_info
.h_addrtype
= AF_INET
;
1572 /* Older machines have only one address slot called h_addr.
1573 Newer machines have h_addr_list, but #define h_addr to
1574 be its first element. */
1575 host_info
.h_addr_list
= &(addr_list
[0]);
1577 host_info
.h_addr
= (char*)(&numeric_addr
);
1579 host_info
.h_length
= strlen (addr_list
[0]);
1582 bzero (&address
, sizeof address
);
1583 bcopy (host_info_ptr
->h_addr
, (char *) &address
.sin_addr
,
1584 host_info_ptr
->h_length
);
1585 address
.sin_family
= host_info_ptr
->h_addrtype
;
1586 address
.sin_port
= port
;
1588 s
= socket (host_info_ptr
->h_addrtype
, SOCK_STREAM
, 0);
1590 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1592 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
1593 when connect is interrupted. So let's not let it get interrupted.
1594 Note we do not turn off polling, because polling is only used
1595 when not interrupt_input, and thus not normally used on the systems
1596 which have this bug. On systems which use polling, there's no way
1597 to quit if polling is turned off. */
1598 if (interrupt_input
)
1601 /* Slow down polling to every ten seconds.
1602 Some kernels have a bug which causes retrying connect to fail
1604 #ifdef POLL_FOR_INPUT
1605 bind_polling_period (10);
1609 if (connect (s
, (struct sockaddr
*) &address
, sizeof address
) == -1
1610 && errno
!= EISCONN
)
1616 if (errno
== EADDRINUSE
&& retry
< 20)
1624 if (interrupt_input
)
1628 report_file_error ("connection failed",
1629 Fcons (host
, Fcons (name
, Qnil
)));
1632 #ifdef POLL_FOR_INPUT
1633 unbind_to (count
, Qnil
);
1636 if (interrupt_input
)
1640 s
= connect_server (0);
1642 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1643 send_command (s
, C_PORT
, 0, "%s:%d", XSTRING (host
)->data
, ntohs (port
));
1644 send_command (s
, C_DUMB
, 1, 0);
1650 report_file_error ("error duplicating socket", Fcons (name
, Qnil
));
1653 buffer
= Fget_buffer_create (buffer
);
1654 proc
= make_process (name
);
1656 chan_process
[inch
] = proc
;
1659 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
1662 fcntl (inch
, F_SETFL
, O_NDELAY
);
1666 XPROCESS (proc
)->childp
= host
;
1667 XPROCESS (proc
)->command_channel_p
= Qnil
;
1668 XPROCESS (proc
)->buffer
= buffer
;
1669 XPROCESS (proc
)->sentinel
= Qnil
;
1670 XPROCESS (proc
)->filter
= Qnil
;
1671 XPROCESS (proc
)->command
= Qnil
;
1672 XPROCESS (proc
)->pid
= Qnil
;
1673 XSETINT (XPROCESS (proc
)->infd
, s
);
1674 XSETINT (XPROCESS (proc
)->outfd
, outch
);
1675 XPROCESS (proc
)->status
= Qrun
;
1676 FD_SET (inch
, &input_wait_mask
);
1677 FD_SET (inch
, &non_keyboard_wait_mask
);
1678 if (inch
> max_process_desc
)
1679 max_process_desc
= inch
;
1684 #endif /* HAVE_SOCKETS */
1686 deactivate_process (proc
)
1689 register int inchannel
, outchannel
;
1690 register struct Lisp_Process
*p
= XPROCESS (proc
);
1692 inchannel
= XINT (p
->infd
);
1693 outchannel
= XINT (p
->outfd
);
1697 /* Beware SIGCHLD hereabouts. */
1698 flush_pending_output (inchannel
);
1701 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
1702 sys$
dassgn (outchannel
);
1703 vs
= get_vms_process_pointer (p
->pid
);
1705 give_back_vms_process_stuff (vs
);
1709 if (outchannel
>= 0 && outchannel
!= inchannel
)
1713 XSETINT (p
->infd
, -1);
1714 XSETINT (p
->outfd
, -1);
1715 chan_process
[inchannel
] = Qnil
;
1716 FD_CLR (inchannel
, &input_wait_mask
);
1717 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
1718 if (inchannel
== max_process_desc
)
1721 /* We just closed the highest-numbered process input descriptor,
1722 so recompute the highest-numbered one now. */
1723 max_process_desc
= 0;
1724 for (i
= 0; i
< MAXDESC
; i
++)
1725 if (!NILP (chan_process
[i
]))
1726 max_process_desc
= i
;
1731 /* Close all descriptors currently in use for communication
1732 with subprocess. This is used in a newly-forked subprocess
1733 to get rid of irrelevant descriptors. */
1735 close_process_descs ()
1738 for (i
= 0; i
< MAXDESC
; i
++)
1740 Lisp_Object process
;
1741 process
= chan_process
[i
];
1742 if (!NILP (process
))
1744 int in
= XINT (XPROCESS (process
)->infd
);
1745 int out
= XINT (XPROCESS (process
)->outfd
);
1748 if (out
>= 0 && in
!= out
)
1754 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
1756 "Allow any pending output from subprocesses to be read by Emacs.\n\
1757 It is read into the process' buffers or given to their filter functions.\n\
1758 Non-nil arg PROCESS means do not return until some output has been received\n\
1760 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
1761 seconds and microseconds to wait; return after that much time whether\n\
1762 or not there is input.\n\
1763 Return non-nil iff we received any output before the timeout expired.")
1764 (proc
, timeout
, timeout_msecs
)
1765 register Lisp_Object proc
, timeout
, timeout_msecs
;
1770 if (! NILP (timeout_msecs
))
1772 CHECK_NUMBER (timeout_msecs
, 2);
1773 useconds
= XINT (timeout_msecs
);
1774 if (!INTEGERP (timeout
))
1775 XSETINT (timeout
, 0);
1778 int carry
= useconds
/ 1000000;
1780 XSETINT (timeout
, XINT (timeout
) + carry
);
1781 useconds
-= carry
* 1000000;
1783 /* I think this clause is necessary because C doesn't
1784 guarantee a particular rounding direction for negative
1788 XSETINT (timeout
, XINT (timeout
) - 1);
1789 useconds
+= 1000000;
1796 if (! NILP (timeout
))
1798 CHECK_NUMBER (timeout
, 1);
1799 seconds
= XINT (timeout
);
1812 XSETFASTINT (proc
, 0);
1815 (wait_reading_process_input (seconds
, useconds
, proc
, 0)
1819 /* This variable is different from waiting_for_input in keyboard.c.
1820 It is used to communicate to a lisp process-filter/sentinel (via the
1821 function Fwaiting_for_user_input_p below) whether emacs was waiting
1822 for user-input when that process-filter was called.
1823 waiting_for_input cannot be used as that is by definition 0 when
1824 lisp code is being evalled.
1825 This is also used in record_asynch_buffer_change.
1826 For that purpose, this must be 0
1827 when not inside wait_reading_process_input. */
1828 static int waiting_for_user_input_p
;
1830 /* Read and dispose of subprocess output while waiting for timeout to
1831 elapse and/or keyboard input to be available.
1834 timeout in seconds, or
1835 zero for no limit, or
1836 -1 means gobble data immediately available but don't wait for any.
1839 an additional duration to wait, measured in microseconds.
1840 If this is nonzero and time_limit is 0, then the timeout
1841 consists of MICROSECS only.
1843 READ_KBD is a lisp value:
1844 0 to ignore keyboard input, or
1845 1 to return when input is available, or
1846 -1 meaning caller will actually read the input, so don't throw to
1847 the quit handler, or
1848 a cons cell, meaning wait until its car is non-nil
1849 (and gobble terminal input into the buffer if any arrives), or
1850 a process object, meaning wait until something arrives from that
1851 process. The return value is true iff we read some input from
1854 DO_DISPLAY != 0 means redisplay should be done to show subprocess
1855 output that arrives.
1857 If READ_KBD is a pointer to a struct Lisp_Process, then the
1858 function returns true iff we received input from that process
1859 before the timeout elapsed.
1860 Otherwise, return true iff we received input from any process. */
1862 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
1863 int time_limit
, microsecs
;
1864 Lisp_Object read_kbd
;
1867 register int channel
, nfds
, m
;
1868 static SELECT_TYPE Available
;
1871 EMACS_TIME timeout
, end_time
, garbage
;
1873 int wait_channel
= -1;
1874 struct Lisp_Process
*wait_proc
= 0;
1875 int got_some_input
= 0;
1876 Lisp_Object
*wait_for_cell
= 0;
1878 FD_ZERO (&Available
);
1880 /* If read_kbd is a process to watch, set wait_proc and wait_channel
1882 if (PROCESSP (read_kbd
))
1884 wait_proc
= XPROCESS (read_kbd
);
1885 wait_channel
= XINT (wait_proc
->infd
);
1886 XSETFASTINT (read_kbd
, 0);
1889 /* If waiting for non-nil in a cell, record where. */
1890 if (CONSP (read_kbd
))
1892 wait_for_cell
= &XCONS (read_kbd
)->car
;
1893 XSETFASTINT (read_kbd
, 0);
1896 waiting_for_user_input_p
= XINT (read_kbd
);
1898 /* Since we may need to wait several times,
1899 compute the absolute time to return at. */
1900 if (time_limit
|| microsecs
)
1902 EMACS_GET_TIME (end_time
);
1903 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
1904 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
1907 /* It would not be safe to call this below,
1908 where we call redisplay_preserve_echo_area. */
1909 if (do_display
&& frame_garbaged
)
1910 prepare_menu_bars ();
1914 /* If calling from keyboard input, do not quit
1915 since we want to return C-g as an input character.
1916 Otherwise, do pending quit if requested. */
1917 if (XINT (read_kbd
) >= 0)
1920 /* Exit now if the cell we're waiting for became non-nil. */
1921 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
1924 /* Compute time from now till when time limit is up */
1925 /* Exit if already run out */
1926 if (time_limit
== -1)
1928 /* -1 specified for timeout means
1929 gobble output available now
1930 but don't wait at all. */
1932 EMACS_SET_SECS_USECS (timeout
, 0, 0);
1934 else if (time_limit
|| microsecs
)
1936 EMACS_GET_TIME (timeout
);
1937 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
1938 if (EMACS_TIME_NEG_P (timeout
))
1943 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
1946 /* Cause C-g and alarm signals to take immediate action,
1947 and cause input available signals to zero out timeout.
1949 It is important that we do this before checking for process
1950 activity. If we get a SIGCHLD after the explicit checks for
1951 process activity, timeout is the only way we will know. */
1952 if (XINT (read_kbd
) < 0)
1953 set_waiting_for_input (&timeout
);
1955 /* If status of something has changed, and no input is
1956 available, notify the user of the change right away. After
1957 this explicit check, we'll let the SIGCHLD handler zap
1958 timeout to get our attention. */
1959 if (update_tick
!= process_tick
&& do_display
)
1961 Atemp
= input_wait_mask
;
1962 EMACS_SET_SECS_USECS (timeout
, 0, 0);
1963 if (select (MAXDESC
, &Atemp
, 0, 0, &timeout
) <= 0)
1965 /* It's okay for us to do this and then continue with
1966 the loop, since timeout has already been zeroed out. */
1967 clear_waiting_for_input ();
1972 /* Don't wait for output from a non-running process. */
1973 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
1974 update_status (wait_proc
);
1976 && ! EQ (wait_proc
->status
, Qrun
))
1978 clear_waiting_for_input ();
1982 /* Wait till there is something to do */
1984 if (! XINT (read_kbd
) && wait_for_cell
== 0)
1985 Available
= non_keyboard_wait_mask
;
1987 Available
= input_wait_mask
;
1989 /* If frame size has changed or the window is newly mapped,
1990 redisplay now, before we start to wait. There is a race
1991 condition here; if a SIGIO arrives between now and the select
1992 and indicates that a frame is trashed, the select may block
1993 displaying a trashed screen. */
1994 if (frame_garbaged
&& do_display
)
1995 redisplay_preserve_echo_area ();
1997 if (XINT (read_kbd
) && detect_input_pending ())
2000 FD_ZERO (&Available
);
2003 nfds
= select (MAXDESC
, &Available
, 0, 0, &timeout
);
2007 /* Make C-g and alarm signals set flags again */
2008 clear_waiting_for_input ();
2010 /* If we woke up due to SIGWINCH, actually change size now. */
2011 do_pending_window_change ();
2013 if (time_limit
&& nfds
== 0) /* timeout elapsed */
2017 if (xerrno
== EINTR
)
2018 FD_ZERO (&Available
);
2020 /* Ultrix select seems to return ENOMEM when it is
2021 interrupted. Treat it just like EINTR. Bleah. Note
2022 that we want to test for the "ultrix" CPP symbol, not
2023 "__ultrix__"; the latter is only defined under GCC, but
2024 not by DEC's bundled CC. -JimB */
2025 else if (xerrno
== ENOMEM
)
2026 FD_ZERO (&Available
);
2029 /* This happens for no known reason on ALLIANT.
2030 I am guessing that this is the right response. -- RMS. */
2031 else if (xerrno
== EFAULT
)
2032 FD_ZERO (&Available
);
2034 else if (xerrno
== EBADF
)
2037 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
2038 the child's closure of the pts gives the parent a SIGHUP, and
2039 the ptc file descriptor is automatically closed,
2040 yielding EBADF here or at select() call above.
2041 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
2042 in m/ibmrt-aix.h), and here we just ignore the select error.
2043 Cleanup occurs c/o status_notify after SIGCLD. */
2044 FD_ZERO (&Available
); /* Cannot depend on values returned */
2050 error("select error: %s", strerror (xerrno
));
2052 #if defined(sun) && !defined(USG5_4)
2053 else if (nfds
> 0 && keyboard_bit_set (&Available
)
2055 /* System sometimes fails to deliver SIGIO.
2057 David J. Mackenzie says that Emacs doesn't compile under
2058 Solaris if this code is enabled, thus the USG5_4 in the CPP
2059 conditional. "I haven't noticed any ill effects so far.
2060 If you find a Solaris expert somewhere, they might know
2062 kill (getpid (), SIGIO
);
2065 /* Check for keyboard input */
2066 /* If there is any, return immediately
2067 to give it higher priority than subprocesses */
2069 /* We used to do this if wait_for_cell,
2070 but that caused infinite recursion in selection request events. */
2071 if ((XINT (read_kbd
) || wait_for_cell
)
2072 && detect_input_pending ())
2075 if (detect_input_pending ())
2079 /* Exit now if the cell we're waiting for became non-nil. */
2080 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2084 /* If we think we have keyboard input waiting, but didn't get SIGIO
2085 go read it. This can happen with X on BSD after logging out.
2086 In that case, there really is no input and no SIGIO,
2087 but select says there is input. */
2089 if (XINT (read_kbd
) && interrupt_input
2090 && (keyboard_bit_set (&Available
)))
2095 got_some_input
|= nfds
> 0;
2097 /* If checking input just got us a size-change event from X,
2098 obey it now if we should. */
2099 if (XINT (read_kbd
) || wait_for_cell
)
2100 do_pending_window_change ();
2102 /* Check for data from a process. */
2103 /* Really FIRST_PROC_DESC should be 0 on Unix,
2104 but this is safer in the short run. */
2105 for (channel
= 0; channel
<= max_process_desc
; channel
++)
2107 if (FD_ISSET (channel
, &Available
)
2108 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
2112 /* If waiting for this channel, arrange to return as
2113 soon as no more input to be processed. No more
2115 if (wait_channel
== channel
)
2121 proc
= chan_process
[channel
];
2125 /* Read data from the process, starting with our
2126 buffered-ahead character if we have one. */
2128 nread
= read_process_output (proc
, channel
);
2131 /* Since read_process_output can run a filter,
2132 which can call accept-process-output,
2133 don't try to read from any other processes
2134 before doing the select again. */
2135 FD_ZERO (&Available
);
2138 redisplay_preserve_echo_area ();
2141 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2145 else if (nread
== -1 && errno
== EAGAIN
)
2149 else if (nread
== -1 && errno
== EAGAIN
)
2151 /* Note that we cannot distinguish between no input
2152 available now and a closed pipe.
2153 With luck, a closed pipe will be accompanied by
2154 subprocess termination and SIGCHLD. */
2155 else if (nread
== 0 && !NETCONN_P (proc
))
2157 #endif /* O_NDELAY */
2158 #endif /* O_NONBLOCK */
2159 #endif /* EWOULDBLOCK */
2161 /* On some OSs with ptys, when the process on one end of
2162 a pty exits, the other end gets an error reading with
2163 errno = EIO instead of getting an EOF (0 bytes read).
2164 Therefore, if we get an error reading and errno =
2165 EIO, just continue, because the child process has
2166 exited and should clean itself up soon (e.g. when we
2168 else if (nread
== -1 && errno
== EIO
)
2170 #endif /* HAVE_PTYS */
2171 /* If we can detect process termination, don't consider the process
2172 gone just because its pipe is closed. */
2174 else if (nread
== 0 && !NETCONN_P (proc
))
2179 /* Preserve status of processes already terminated. */
2180 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2181 deactivate_process (proc
);
2182 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2183 update_status (XPROCESS (proc
));
2184 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2185 XPROCESS (proc
)->status
2186 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2189 } /* end for each file descriptor */
2190 } /* end while exit conditions not met */
2192 waiting_for_user_input_p
= 0;
2194 /* If calling from keyboard input, do not quit
2195 since we want to return C-g as an input character.
2196 Otherwise, do pending quit if requested. */
2197 if (XINT (read_kbd
) >= 0)
2199 /* Prevent input_pending from remaining set if we quit. */
2200 clear_input_pending ();
2204 return got_some_input
;
2207 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
2210 read_process_output_call (fun_and_args
)
2211 Lisp_Object fun_and_args
;
2213 return apply1 (XCONS (fun_and_args
)->car
, XCONS (fun_and_args
)->cdr
);
2217 read_process_output_error_handler (error
)
2220 cmd_error_internal (error
, "error in process filter: ");
2222 update_echo_area ();
2223 Fsleep_for (make_number (2));
2226 /* Read pending output from the process channel,
2227 starting with our buffered-ahead character if we have one.
2228 Yield number of characters read.
2230 This function reads at most 1024 characters.
2231 If you want to read all available subprocess output,
2232 you must call it repeatedly until it returns zero. */
2234 read_process_output (proc
, channel
)
2236 register int channel
;
2238 register int nchars
;
2244 register Lisp_Object outstream
;
2245 register struct buffer
*old
= current_buffer
;
2246 register struct Lisp_Process
*p
= XPROCESS (proc
);
2247 register int opoint
;
2250 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2252 vs
= get_vms_process_pointer (p
->pid
);
2256 return(0); /* Really weird if it does this */
2257 if (!(vs
->iosb
[0] & 1))
2258 return -1; /* I/O error */
2261 error ("Could not get VMS process pointer");
2262 chars
= vs
->inputBuffer
;
2263 nchars
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2266 start_vms_process_read (vs
); /* Crank up the next read on the process */
2267 return 1; /* Nothing worth printing, say we got 1 */
2271 if (proc_buffered_char
[channel
] < 0)
2272 nchars
= read (channel
, chars
, sizeof chars
);
2275 chars
[0] = proc_buffered_char
[channel
];
2276 proc_buffered_char
[channel
] = -1;
2277 nchars
= read (channel
, chars
+ 1, sizeof chars
- 1);
2281 nchars
= nchars
+ 1;
2283 #endif /* not VMS */
2285 if (nchars
<= 0) return nchars
;
2287 outstream
= p
->filter
;
2288 if (!NILP (outstream
))
2290 /* We inhibit quit here instead of just catching it so that
2291 hitting ^G when a filter happens to be running won't screw
2293 int count
= specpdl_ptr
- specpdl
;
2294 Lisp_Object odeactivate
;
2295 Lisp_Object obuffer
;
2297 odeactivate
= Vdeactivate_mark
;
2298 obuffer
= Fcurrent_buffer ();
2300 specbind (Qinhibit_quit
, Qt
);
2301 specbind (Qlast_nonmenu_event
, Qt
);
2303 internal_condition_case_1 (read_process_output_call
,
2306 Fcons (make_string (chars
, nchars
),
2308 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
2309 read_process_output_error_handler
);
2311 /* Handling the process output should not deactivate the mark. */
2312 Vdeactivate_mark
= odeactivate
;
2314 if (! EQ (Fcurrent_buffer (), obuffer
))
2315 record_asynch_buffer_change ();
2317 if (waiting_for_user_input_p
)
2318 prepare_menu_bars ();
2321 start_vms_process_read (vs
);
2323 unbind_to (count
, Qnil
);
2327 /* If no filter, write into buffer if it isn't dead. */
2328 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2330 Lisp_Object old_read_only
;
2331 Lisp_Object old_begv
, old_zv
;
2332 Lisp_Object odeactivate
;
2334 odeactivate
= Vdeactivate_mark
;
2336 Fset_buffer (p
->buffer
);
2338 old_read_only
= current_buffer
->read_only
;
2339 XSETFASTINT (old_begv
, BEGV
);
2340 XSETFASTINT (old_zv
, ZV
);
2342 current_buffer
->read_only
= Qnil
;
2344 /* Insert new output into buffer
2345 at the current end-of-output marker,
2346 thus preserving logical ordering of input and output. */
2347 if (XMARKER (p
->mark
)->buffer
)
2348 SET_PT (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
));
2352 /* If the output marker is outside of the visible region, save
2353 the restriction and widen. */
2354 if (! (BEGV
<= point
&& point
<= ZV
))
2357 /* Make sure opoint floats ahead of any new text, just as point
2359 if (point
<= opoint
)
2362 /* Insert after old_begv, but before old_zv. */
2363 if (point
< XFASTINT (old_begv
))
2364 XSETFASTINT (old_begv
, XFASTINT (old_begv
) + nchars
);
2365 if (point
<= XFASTINT (old_zv
))
2366 XSETFASTINT (old_zv
, XFASTINT (old_zv
) + nchars
);
2368 /* Insert before markers in case we are inserting where
2369 the buffer's mark is, and the user's next command is Meta-y. */
2370 insert_before_markers (chars
, nchars
);
2371 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
2373 update_mode_lines
++;
2375 /* If the restriction isn't what it should be, set it. */
2376 if (XFASTINT (old_begv
) != BEGV
|| XFASTINT (old_zv
) != ZV
)
2377 Fnarrow_to_region (old_begv
, old_zv
);
2379 /* Handling the process output should not deactivate the mark. */
2380 Vdeactivate_mark
= odeactivate
;
2382 current_buffer
->read_only
= old_read_only
;
2384 set_buffer_internal (old
);
2387 start_vms_process_read (vs
);
2392 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
2394 "Returns non-nil if emacs is waiting for input from the user.\n\
2395 This is intended for use by asynchronous process output filters and sentinels.")
2398 return (waiting_for_user_input_p
? Qt
: Qnil
);
2401 /* Sending data to subprocess */
2403 jmp_buf send_process_frame
;
2406 send_process_trap ()
2412 longjmp (send_process_frame
, 1);
2415 /* Send some data to process PROC.
2416 BUF is the beginning of the data; LEN is the number of characters.
2417 OBJECT is the Lisp object that the data comes from. */
2419 send_process (proc
, buf
, len
, object
)
2425 /* Don't use register vars; longjmp can lose them. */
2427 unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
2430 struct Lisp_Process
*p
= XPROCESS (proc
);
2431 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2434 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2435 update_status (XPROCESS (proc
));
2436 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2437 error ("Process %s not running", procname
);
2440 vs
= get_vms_process_pointer (p
->pid
);
2442 error ("Could not find this process: %x", p
->pid
);
2443 else if (write_to_vms_process (vs
, buf
, len
))
2447 if (pty_max_bytes
== 0)
2449 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
2450 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
2452 if (pty_max_bytes
< 0)
2453 pty_max_bytes
= 250;
2455 pty_max_bytes
= 250;
2457 /* Deduct one, to leave space for the eof. */
2461 if (!setjmp (send_process_frame
))
2465 SIGTYPE (*old_sigpipe
)();
2468 /* Decide how much data we can send in one batch.
2469 Long lines need to be split into multiple batches. */
2470 if (!NILP (XPROCESS (proc
)->pty_flag
))
2472 /* Starting this at zero is always correct when not the first iteration
2473 because the previous iteration ended by sending C-d.
2474 It may not be correct for the first iteration
2475 if a partial line was sent in a separate send_process call.
2476 If that proves worth handling, we need to save linepos
2477 in the process object. */
2480 char *end
= buf
+ len
;
2482 /* Scan through this text for a line that is too long. */
2483 while (ptr
!= end
&& linepos
< pty_max_bytes
)
2491 /* If we found one, break the line there
2492 and put in a C-d to force the buffer through. */
2496 /* Send this batch, using one or more write calls. */
2499 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
2500 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
2501 signal (SIGPIPE
, old_sigpipe
);
2507 || errno
== EWOULDBLOCK
2513 /* Buffer is full. Wait, accepting input;
2514 that may allow the program
2515 to finish doing output and read more. */
2520 /* Running filters might relocate buffers or strings.
2521 Arrange to relocate BUF. */
2522 if (BUFFERP (object
))
2523 offset
= BUF_PTR_CHAR_POS (XBUFFER (object
),
2524 (unsigned char *) buf
);
2525 else if (STRINGP (object
))
2526 offset
= buf
- (char *) XSTRING (object
)->data
;
2528 XSETFASTINT (zero
, 0);
2529 wait_reading_process_input (1, 0, zero
, 0);
2531 if (BUFFERP (object
))
2532 buf
= (char *) BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
2533 else if (STRINGP (object
))
2534 buf
= offset
+ (char *) XSTRING (object
)->data
;
2539 /* This is a real error. */
2540 report_file_error ("writing to process", Fcons (proc
, Qnil
));
2547 /* If we sent just part of the string, put in an EOF
2548 to force it through, before we send the rest. */
2550 Fprocess_send_eof (proc
);
2555 XPROCESS (proc
)->raw_status_low
= Qnil
;
2556 XPROCESS (proc
)->raw_status_high
= Qnil
;
2557 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2558 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2559 deactivate_process (proc
);
2561 error ("Error writing to process %s; closed it", procname
);
2563 error ("SIGPIPE raised on process %s; closed it", procname
);
2568 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
2570 "Send current contents of region as input to PROCESS.\n\
2571 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2572 nil, indicating the current buffer's process.\n\
2573 Called from program, takes three arguments, PROCESS, START and END.\n\
2574 If the region is more than 500 characters long,\n\
2575 it is sent in several bunches. This may happen even for shorter regions.\n\
2576 Output from processes can arrive in between bunches.")
2577 (process
, start
, end
)
2578 Lisp_Object process
, start
, end
;
2583 proc
= get_process (process
);
2584 validate_region (&start
, &end
);
2586 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
2589 start1
= XINT (start
);
2590 send_process (proc
, &FETCH_CHAR (start1
), XINT (end
) - XINT (start
),
2591 Fcurrent_buffer ());
2596 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
2598 "Send PROCESS the contents of STRING as input.\n\
2599 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2600 nil, indicating the current buffer's process.\n\
2601 If STRING is more than 500 characters long,\n\
2602 it is sent in several bunches. This may happen even for shorter strings.\n\
2603 Output from processes can arrive in between bunches.")
2605 Lisp_Object process
, string
;
2608 CHECK_STRING (string
, 1);
2609 proc
= get_process (process
);
2610 send_process (proc
, XSTRING (string
)->data
, XSTRING (string
)->size
, string
);
2614 /* send a signal number SIGNO to PROCESS.
2615 CURRENT_GROUP means send to the process group that currently owns
2616 the terminal being used to communicate with PROCESS.
2617 This is used for various commands in shell mode.
2618 If NOMSG is zero, insert signal-announcements into process's buffers
2621 If we can, we try to signal PROCESS by sending control characters
2622 down the pty. This allows us to signal inferiors who have changed
2623 their uid, for which killpg would return an EPERM error. */
2626 process_send_signal (process
, signo
, current_group
, nomsg
)
2627 Lisp_Object process
;
2629 Lisp_Object current_group
;
2633 register struct Lisp_Process
*p
;
2637 proc
= get_process (process
);
2638 p
= XPROCESS (proc
);
2640 if (!EQ (p
->childp
, Qt
))
2641 error ("Process %s is not a subprocess",
2642 XSTRING (p
->name
)->data
);
2643 if (XINT (p
->infd
) < 0)
2644 error ("Process %s is not active",
2645 XSTRING (p
->name
)->data
);
2647 if (NILP (p
->pty_flag
))
2648 current_group
= Qnil
;
2650 /* If we are using pgrps, get a pgrp number and make it negative. */
2651 if (!NILP (current_group
))
2653 #ifdef SIGNALS_VIA_CHARACTERS
2654 /* If possible, send signals to the entire pgrp
2655 by sending an input character to it. */
2657 /* TERMIOS is the latest and bestest, and seems most likely to
2658 work. If the system has it, use it. */
2665 tcgetattr (XINT (p
->infd
), &t
);
2666 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2670 tcgetattr (XINT (p
->infd
), &t
);
2671 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2675 tcgetattr (XINT (p
->infd
), &t
);
2676 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
2677 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2679 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
2684 #else /* ! HAVE_TERMIOS */
2686 /* On Berkeley descendants, the following IOCTL's retrieve the
2687 current control characters. */
2688 #if defined (TIOCGLTC) && defined (TIOCGETC)
2696 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2697 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
2700 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2701 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
2705 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
2706 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
2708 #endif /* ! defined (SIGTSTP) */
2711 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2713 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
2720 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2721 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2724 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2725 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2729 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2730 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2732 #endif /* ! defined (SIGTSTP) */
2734 #else /* ! defined (TCGETA) */
2735 Your configuration files are messed up
.
2736 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
2737 you'd better be using one of the alternatives above! */
2738 #endif /* ! defined (TCGETA) */
2739 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2740 #endif /* ! defined HAVE_TERMIOS */
2741 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
2744 /* Get the pgrp using the tty itself, if we have that.
2745 Otherwise, use the pty to get the pgrp.
2746 On pfa systems, saka@pfu.fujitsu.co.JP writes:
2747 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
2748 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
2749 His patch indicates that if TIOCGPGRP returns an error, then
2750 we should just assume that p->pid is also the process group id. */
2754 if (!NILP (p
->subtty
))
2755 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
2757 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
2761 gid
= - XFASTINT (p
->pid
);
2762 #endif /* ! defined (pfa) */
2768 #else /* ! defined (TIOCGPGRP ) */
2769 /* Can't select pgrps on this system, so we know that
2770 the child itself heads the pgrp. */
2771 gid
= - XFASTINT (p
->pid
);
2772 #endif /* ! defined (TIOCGPGRP ) */
2775 gid
= - XFASTINT (p
->pid
);
2781 p
->raw_status_low
= Qnil
;
2782 p
->raw_status_high
= Qnil
;
2784 XSETINT (p
->tick
, ++process_tick
);
2788 #endif /* ! defined (SIGCONT) */
2791 send_process (proc
, "\003", 1, Qnil
); /* ^C */
2796 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
2801 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
2804 flush_pending_output (XINT (p
->infd
));
2808 /* If we don't have process groups, send the signal to the immediate
2809 subprocess. That isn't really right, but it's better than any
2810 obvious alternative. */
2813 kill (XFASTINT (p
->pid
), signo
);
2817 /* gid may be a pid, or minus a pgrp's number */
2819 if (!NILP (current_group
))
2820 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
2823 gid
= - XFASTINT (p
->pid
);
2826 #else /* ! defined (TIOCSIGSEND) */
2827 EMACS_KILLPG (-gid
, signo
);
2828 #endif /* ! defined (TIOCSIGSEND) */
2831 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
2832 "Interrupt process PROCESS. May be process or name of one.\n\
2833 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
2834 nil or no arg means current buffer's process.\n\
2835 Second arg CURRENT-GROUP non-nil means send signal to\n\
2836 the current process-group of the process's controlling terminal\n\
2837 rather than to the process's own process group.\n\
2838 If the process is a shell, this means interrupt current subjob\n\
2839 rather than the shell.")
2840 (process
, current_group
)
2841 Lisp_Object process
, current_group
;
2843 process_send_signal (process
, SIGINT
, current_group
, 0);
2847 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
2848 "Kill process PROCESS. May be process or name of one.\n\
2849 See function `interrupt-process' for more details on usage.")
2850 (process
, current_group
)
2851 Lisp_Object process
, current_group
;
2853 process_send_signal (process
, SIGKILL
, current_group
, 0);
2857 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
2858 "Send QUIT signal to process PROCESS. May be process or name of one.\n\
2859 See function `interrupt-process' for more details on usage.")
2860 (process
, current_group
)
2861 Lisp_Object process
, current_group
;
2863 process_send_signal (process
, SIGQUIT
, current_group
, 0);
2867 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
2868 "Stop process PROCESS. May be process or name of one.\n\
2869 See function `interrupt-process' for more details on usage.")
2870 (process
, current_group
)
2871 Lisp_Object process
, current_group
;
2874 error ("no SIGTSTP support");
2876 process_send_signal (process
, SIGTSTP
, current_group
, 0);
2881 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
2882 "Continue process PROCESS. May be process or name of one.\n\
2883 See function `interrupt-process' for more details on usage.")
2884 (process
, current_group
)
2885 Lisp_Object process
, current_group
;
2888 process_send_signal (process
, SIGCONT
, current_group
, 0);
2890 error ("no SIGCONT support");
2895 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
2896 2, 2, "nProcess number: \nnSignal code: ",
2897 "Send the process with number PID the signal with code CODE.\n\
2898 Both PID and CODE are integers.")
2900 Lisp_Object pid
, sig
;
2902 CHECK_NUMBER (pid
, 0);
2903 CHECK_NUMBER (sig
, 1);
2904 return make_number (kill (XINT (pid
), XINT (sig
)));
2907 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
2908 "Make PROCESS see end-of-file in its input.\n\
2909 Eof comes after any text already sent to it.\n\
2910 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2911 nil, indicating the current buffer's process.\n\
2912 If PROCESS is a network connection, or is a process communicating\n\
2913 through a pipe (as opposed to a pty), then you cannot send any more\n\
2914 text to PROCESS after you call this function.")
2916 Lisp_Object process
;
2920 proc
= get_process (process
);
2922 /* Make sure the process is really alive. */
2923 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2924 update_status (XPROCESS (proc
));
2925 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2926 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
2929 send_process (proc
, "\032", 1, Qnil
); /* ^z */
2931 if (!NILP (XPROCESS (proc
)->pty_flag
))
2932 send_process (proc
, "\004", 1, Qnil
);
2935 close (XINT (XPROCESS (proc
)->outfd
));
2936 XSETINT (XPROCESS (proc
)->outfd
, open (NULL_DEVICE
, O_WRONLY
));
2942 /* Kill all processes associated with `buffer'.
2943 If `buffer' is nil, kill all processes */
2945 kill_buffer_processes (buffer
)
2948 Lisp_Object tail
, proc
;
2950 for (tail
= Vprocess_alist
; XGCTYPE (tail
) == Lisp_Cons
;
2951 tail
= XCONS (tail
)->cdr
)
2953 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
2954 if (XGCTYPE (proc
) == Lisp_Process
2955 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
2957 if (NETCONN_P (proc
))
2958 Fdelete_process (proc
);
2959 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
2960 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
2965 /* On receipt of a signal that a child status has changed,
2966 loop asking about children with changed statuses until
2967 the system says there are no more.
2968 All we do is change the status;
2969 we do not run sentinels or print notifications.
2970 That is saved for the next time keyboard input is done,
2971 in order to avoid timing errors. */
2973 /** WARNING: this can be called during garbage collection.
2974 Therefore, it must not be fooled by the presence of mark bits in
2977 /** USG WARNING: Although it is not obvious from the documentation
2978 in signal(2), on a USG system the SIGCLD handler MUST NOT call
2979 signal() before executing at least one wait(), otherwise the handler
2980 will be called again, resulting in an infinite loop. The relevant
2981 portion of the documentation reads "SIGCLD signals will be queued
2982 and the signal-catching function will be continually reentered until
2983 the queue is empty". Invoking signal() causes the kernel to reexamine
2984 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
2987 sigchld_handler (signo
)
2990 int old_errno
= errno
;
2992 register struct Lisp_Process
*p
;
2993 extern EMACS_TIME
*input_available_clear_time
;
2997 sigheld
|= sigbit (SIGCHLD
);
3009 #endif /* no WUNTRACED */
3010 /* Keep trying to get a status until we get a definitive result. */
3014 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
3016 while (pid
<= 0 && errno
== EINTR
);
3020 /* A real failure. We have done all our job, so return. */
3022 /* USG systems forget handlers when they are used;
3023 must reestablish each time */
3025 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
3028 sigheld
&= ~sigbit (SIGCHLD
);
3036 #endif /* no WNOHANG */
3038 /* Find the process that signaled us, and record its status. */
3041 for (tail
= Vprocess_alist
; XSYMBOL (tail
) != XSYMBOL (Qnil
); tail
= XCONS (tail
)->cdr
)
3043 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3044 p
= XPROCESS (proc
);
3045 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
3050 /* Look for an asynchronous process whose pid hasn't been filled
3053 for (tail
= Vprocess_alist
; XSYMBOL (tail
) != XSYMBOL (Qnil
); tail
= XCONS (tail
)->cdr
)
3055 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3056 p
= XPROCESS (proc
);
3057 if (INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
3062 /* Change the status of the process that was found. */
3065 union { int i
; WAITTYPE wt
; } u
;
3067 XSETINT (p
->tick
, ++process_tick
);
3069 XSETFASTINT (p
->raw_status_low
, u
.i
& 0xffff);
3070 XSETFASTINT (p
->raw_status_high
, u
.i
>> 16);
3072 /* If process has terminated, stop waiting for its output. */
3073 if (WIFSIGNALED (w
) || WIFEXITED (w
))
3074 if (XINT (p
->infd
) >= 0)
3076 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
3077 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
3080 /* Tell wait_reading_process_input that it needs to wake up and
3082 if (input_available_clear_time
)
3083 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3086 /* There was no asynchronous process found for that id. Check
3087 if we have a synchronous process. */
3090 synch_process_alive
= 0;
3092 /* Report the status of the synchronous process. */
3094 synch_process_retcode
= WRETCODE (w
);
3095 else if (WIFSIGNALED (w
))
3097 int code
= WTERMSIG (w
);
3103 signame
= sys_siglist
[code
];
3105 signame
= sys_errlist
[code
];
3109 signame
= "unknown";
3111 synch_process_death
= signame
;
3114 /* Tell wait_reading_process_input that it needs to wake up and
3116 if (input_available_clear_time
)
3117 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3120 /* On some systems, we must return right away.
3121 If any more processes want to signal us, we will
3123 Otherwise (on systems that have WNOHANG), loop around
3124 to use up all the processes that have something to tell us. */
3125 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG))
3127 signal (signo
, sigchld_handler
);
3131 #endif /* USG, but not HPUX with WNOHANG */
3137 exec_sentinel_unwind (data
)
3140 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
3145 exec_sentinel_error_handler (error
)
3148 cmd_error_internal (error
, "error in process sentinel: ");
3150 update_echo_area ();
3151 Fsleep_for (make_number (2));
3155 exec_sentinel (proc
, reason
)
3156 Lisp_Object proc
, reason
;
3158 Lisp_Object sentinel
, obuffer
, odeactivate
;
3159 register struct Lisp_Process
*p
= XPROCESS (proc
);
3160 int count
= specpdl_ptr
- specpdl
;
3162 odeactivate
= Vdeactivate_mark
;
3163 obuffer
= Fcurrent_buffer ();
3164 sentinel
= p
->sentinel
;
3165 if (NILP (sentinel
))
3168 /* Zilch the sentinel while it's running, to avoid recursive invocations;
3169 assure that it gets restored no matter how the sentinel exits. */
3171 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
3172 /* Inhibit quit so that random quits don't screw up a running filter. */
3173 specbind (Qinhibit_quit
, Qt
);
3174 specbind (Qlast_nonmenu_event
, Qt
);
3176 internal_condition_case_1 (read_process_output_call
,
3178 Fcons (proc
, Fcons (reason
, Qnil
))),
3179 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
3180 exec_sentinel_error_handler
);
3182 Vdeactivate_mark
= odeactivate
;
3183 if (! EQ (Fcurrent_buffer (), obuffer
))
3184 record_asynch_buffer_change ();
3186 if (waiting_for_user_input_p
)
3187 prepare_menu_bars ();
3188 unbind_to (count
, Qnil
);
3191 /* Report all recent events of a change in process status
3192 (either run the sentinel or output a message).
3193 This is done while Emacs is waiting for keyboard input. */
3197 register Lisp_Object proc
, buffer
;
3198 Lisp_Object tail
, msg
;
3199 struct gcpro gcpro1
, gcpro2
;
3203 /* We need to gcpro tail; if read_process_output calls a filter
3204 which deletes a process and removes the cons to which tail points
3205 from Vprocess_alist, and then causes a GC, tail is an unprotected
3209 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
3212 register struct Lisp_Process
*p
;
3214 proc
= Fcdr (Fcar (tail
));
3215 p
= XPROCESS (proc
);
3217 if (XINT (p
->tick
) != XINT (p
->update_tick
))
3219 XSETINT (p
->update_tick
, XINT (p
->tick
));
3221 /* If process is still active, read any output that remains. */
3222 if (XINT (p
->infd
) >= 0)
3223 while (! EQ (p
->filter
, Qt
)
3224 && read_process_output (proc
, XINT (p
->infd
)) > 0);
3228 /* Get the text to use for the message. */
3229 if (!NILP (p
->raw_status_low
))
3231 msg
= status_message (p
->status
);
3233 /* If process is terminated, deactivate it or delete it. */
3235 if (CONSP (p
->status
))
3236 symbol
= XCONS (p
->status
)->car
;
3238 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
3239 || EQ (symbol
, Qclosed
))
3241 if (delete_exited_processes
)
3242 remove_process (proc
);
3244 deactivate_process (proc
);
3247 /* Now output the message suitably. */
3248 if (!NILP (p
->sentinel
))
3249 exec_sentinel (proc
, msg
);
3250 /* Don't bother with a message in the buffer
3251 when a process becomes runnable. */
3252 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
3254 Lisp_Object ro
, tem
;
3255 struct buffer
*old
= current_buffer
;
3258 ro
= XBUFFER (buffer
)->read_only
;
3260 /* Avoid error if buffer is deleted
3261 (probably that's why the process is dead, too) */
3262 if (NILP (XBUFFER (buffer
)->name
))
3264 Fset_buffer (buffer
);
3266 /* Insert new output into buffer
3267 at the current end-of-output marker,
3268 thus preserving logical ordering of input and output. */
3269 if (XMARKER (p
->mark
)->buffer
)
3270 SET_PT (marker_position (p
->mark
));
3273 if (point
<= opoint
)
3274 opoint
+= XSTRING (msg
)->size
+ XSTRING (p
->name
)->size
+ 10;
3276 tem
= current_buffer
->read_only
;
3277 current_buffer
->read_only
= Qnil
;
3278 insert_string ("\nProcess ");
3279 Finsert (1, &p
->name
);
3280 insert_string (" ");
3282 current_buffer
->read_only
= tem
;
3283 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
3286 set_buffer_internal (old
);
3291 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
3292 redisplay_preserve_echo_area ();
3294 update_tick
= process_tick
;
3299 /* The first time this is called, assume keyboard input comes from DESC
3300 instead of from where we used to expect it.
3301 Subsequent calls mean assume input keyboard can come from DESC
3302 in addition to other places. */
3304 static int add_keyboard_wait_descriptor_called_flag
;
3307 add_keyboard_wait_descriptor (desc
)
3310 if (! add_keyboard_wait_descriptor_called_flag
)
3311 FD_CLR (0, &input_wait_mask
);
3312 add_keyboard_wait_descriptor_called_flag
= 1;
3313 FD_SET (desc
, &input_wait_mask
);
3314 if (desc
> max_keyboard_desc
)
3315 max_keyboard_desc
= desc
;
3318 /* From now on, do not expect DESC to give keyboard input. */
3321 delete_keyboard_wait_descriptor (desc
)
3325 int lim
= max_keyboard_desc
;
3327 FD_CLR (desc
, &input_wait_mask
);
3329 if (desc
== max_keyboard_desc
)
3330 for (fd
= 0; fd
< lim
; fd
++)
3331 if (FD_ISSET (fd
, &input_wait_mask
)
3332 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3333 max_keyboard_desc
= fd
;
3336 /* Return nonzero if *MASK has a bit set
3337 that corresponds to one of the keyboard input descriptors. */
3340 keyboard_bit_set (mask
)
3345 for (fd
= 0; fd
< max_keyboard_desc
; fd
++)
3346 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
3347 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3359 if (! noninteractive
|| initialized
)
3361 signal (SIGCHLD
, sigchld_handler
);
3364 FD_ZERO (&input_wait_mask
);
3365 FD_ZERO (&non_keyboard_wait_mask
);
3366 max_process_desc
= 0;
3368 FD_SET (0, &input_wait_mask
);
3370 Vprocess_alist
= Qnil
;
3371 for (i
= 0; i
< MAXDESC
; i
++)
3373 chan_process
[i
] = Qnil
;
3374 proc_buffered_char
[i
] = -1;
3381 stream_process
= intern ("stream");
3383 Qprocessp
= intern ("processp");
3384 staticpro (&Qprocessp
);
3385 Qrun
= intern ("run");
3387 Qstop
= intern ("stop");
3389 Qsignal
= intern ("signal");
3390 staticpro (&Qsignal
);
3392 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
3395 Qexit = intern ("exit");
3396 staticpro (&Qexit); */
3398 Qopen
= intern ("open");
3400 Qclosed
= intern ("closed");
3401 staticpro (&Qclosed
);
3403 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
3404 staticpro (&Qlast_nonmenu_event
);
3406 staticpro (&Vprocess_alist
);
3408 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
3409 "*Non-nil means delete processes immediately when they exit.\n\
3410 nil means don't delete them until `list-processes' is run.");
3412 delete_exited_processes
= 1;
3414 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
3415 "Control type of device used to communicate with subprocesses.\n\
3416 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
3417 The value has no effect if the system has no ptys or if all ptys are busy:\n\
3418 then a pipe is used in any case.\n\
3419 The value takes effect when `start-process' is called.");
3420 Vprocess_connection_type
= Qt
;
3422 defsubr (&Sprocessp
);
3423 defsubr (&Sget_process
);
3424 defsubr (&Sget_buffer_process
);
3425 defsubr (&Sdelete_process
);
3426 defsubr (&Sprocess_status
);
3427 defsubr (&Sprocess_exit_status
);
3428 defsubr (&Sprocess_id
);
3429 defsubr (&Sprocess_name
);
3430 defsubr (&Sprocess_tty_name
);
3431 defsubr (&Sprocess_command
);
3432 defsubr (&Sset_process_buffer
);
3433 defsubr (&Sprocess_buffer
);
3434 defsubr (&Sprocess_mark
);
3435 defsubr (&Sset_process_filter
);
3436 defsubr (&Sprocess_filter
);
3437 defsubr (&Sset_process_sentinel
);
3438 defsubr (&Sset_process_window_size
);
3439 defsubr (&Sprocess_sentinel
);
3440 defsubr (&Sprocess_kill_without_query
);
3441 defsubr (&Slist_processes
);
3442 defsubr (&Sprocess_list
);
3443 defsubr (&Sstart_process
);
3445 defsubr (&Sopen_network_stream
);
3446 #endif /* HAVE_SOCKETS */
3447 defsubr (&Saccept_process_output
);
3448 defsubr (&Sprocess_send_region
);
3449 defsubr (&Sprocess_send_string
);
3450 defsubr (&Sinterrupt_process
);
3451 defsubr (&Skill_process
);
3452 defsubr (&Squit_process
);
3453 defsubr (&Sstop_process
);
3454 defsubr (&Scontinue_process
);
3455 defsubr (&Sprocess_send_eof
);
3456 defsubr (&Ssignal_process
);
3457 defsubr (&Swaiting_for_user_input_p
);
3458 /* defsubr (&Sprocess_connection); */
3462 #else /* not subprocesses */
3464 #include <sys/types.h>
3468 #include "systime.h"
3469 #include "termopts.h"
3471 extern int frame_garbaged
;
3474 /* As described above, except assuming that there are no subprocesses:
3476 Wait for timeout to elapse and/or keyboard input to be available.
3479 timeout in seconds, or
3480 zero for no limit, or
3481 -1 means gobble data immediately available but don't wait for any.
3483 read_kbd is a Lisp_Object:
3484 0 to ignore keyboard input, or
3485 1 to return when input is available, or
3486 -1 means caller will actually read the input, so don't throw to
3488 We know that read_kbd will never be a Lisp_Process, since
3489 `subprocesses' isn't defined.
3491 do_display != 0 means redisplay should be done to show subprocess
3492 output that arrives.
3494 Return true iff we received input from any process. */
3497 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
3498 int time_limit
, microsecs
;
3499 Lisp_Object read_kbd
;
3502 EMACS_TIME end_time
, timeout
, *timeout_p
;
3505 /* What does time_limit really mean? */
3506 if (time_limit
|| microsecs
)
3508 /* It's not infinite. */
3509 timeout_p
= &timeout
;
3511 if (time_limit
== -1)
3512 /* In fact, it's zero. */
3513 EMACS_SET_SECS_USECS (timeout
, 0, 0);
3515 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
3517 /* How far in the future is that? */
3518 EMACS_GET_TIME (end_time
);
3519 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
3522 /* It's infinite. */
3525 /* This must come before stop_polling. */
3526 prepare_menu_bars ();
3528 /* Turn off periodic alarms (in case they are in use)
3529 because the select emulator uses alarms. */
3536 waitchannels
= XINT (read_kbd
) ? 1 : 0;
3538 /* If calling from keyboard input, do not quit
3539 since we want to return C-g as an input character.
3540 Otherwise, do pending quit if requested. */
3541 if (XINT (read_kbd
) >= 0)
3546 EMACS_GET_TIME (*timeout_p
);
3547 EMACS_SUB_TIME (*timeout_p
, end_time
, *timeout_p
);
3548 if (EMACS_TIME_NEG_P (*timeout_p
))
3552 /* Cause C-g and alarm signals to take immediate action,
3553 and cause input available signals to zero out timeout. */
3554 if (XINT (read_kbd
) < 0)
3555 set_waiting_for_input (&timeout
);
3557 /* If a frame has been newly mapped and needs updating,
3558 reprocess its display stuff. */
3559 if (frame_garbaged
&& do_display
)
3560 redisplay_preserve_echo_area ();
3562 if (XINT (read_kbd
) && detect_input_pending ())
3565 nfds
= select (1, &waitchannels
, 0, 0, timeout_p
);
3567 /* Make C-g and alarm signals set flags again */
3568 clear_waiting_for_input ();
3570 /* If we woke up due to SIGWINCH, actually change size now. */
3571 do_pending_window_change ();
3575 /* If the system call was interrupted, then go around the
3581 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
3582 /* System sometimes fails to deliver SIGIO. */
3583 kill (getpid (), SIGIO
);
3586 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
3590 /* If we have timed out (nfds == 0) or found some input (nfds > 0),
3602 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
3603 /* Don't confuse make-docfile by having two doc strings for this function.
3604 make-docfile does not pay attention to #if, for good reason! */
3607 register Lisp_Object name
;
3612 /* Kill all processes associated with `buffer'.
3613 If `buffer' is nil, kill all processes.
3614 Since we have no subprocesses, this does nothing. */
3616 kill_buffer_processes (buffer
)
3627 defsubr (&Sget_buffer_process
);
3631 #endif /* not subprocesses */