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 Tty 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 (STRINGP (p
->tty_name
))
953 Finsert (1, &p
->tty_name
);
955 insert_string ("(none)");
957 Findent_to (make_number (49), minspace
);
959 if (NETCONN_P (proc
))
961 sprintf (tembuf
, "(network stream connection to %s)\n",
962 XSTRING (p
->childp
)->data
);
963 insert_string (tembuf
);
977 insert_string ("\n");
983 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 0, "",
984 "Display a list of all processes.\n\
985 \(Any processes listed as Exited or Signaled are actually eliminated\n\
986 after the listing is made.)")
989 internal_with_output_to_temp_buffer ("*Process List*",
990 list_processes_1
, Qnil
);
994 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
995 "Return a list of all processes.")
998 return Fmapcar (Qcdr
, Vprocess_alist
);
1001 /* Starting asynchronous inferior processes. */
1003 static Lisp_Object
start_process_unwind ();
1005 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1006 "Start a program in a subprocess. Return the process object for it.\n\
1007 Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\
1008 NAME is name for process. It is modified if necessary to make it unique.\n\
1009 BUFFER is the buffer or (buffer-name) to associate with the process.\n\
1010 Process output goes at end of that buffer, unless you specify\n\
1011 an output stream or filter function to handle the output.\n\
1012 BUFFER may be also nil, meaning that this process is not associated\n\
1014 Third arg is program file name. It is searched for as in the shell.\n\
1015 Remaining arguments are strings to give program as arguments.")
1018 register Lisp_Object
*args
;
1020 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1022 register unsigned char *new_argv
;
1025 register unsigned char **new_argv
;
1028 int count
= specpdl_ptr
- specpdl
;
1032 buffer
= Fget_buffer_create (buffer
);
1034 /* Make sure that the child will be able to chdir to the current
1035 buffer's current directory, or its unhandled equivalent. We
1036 can't just have the child check for an error when it does the
1037 chdir, since it's in a vfork.
1039 We have to GCPRO around this because Fexpand_file_name and
1040 Funhandled_file_name_directory might call a file name handling
1041 function. The argument list is protected by the caller, so all
1042 we really have to worry about is buffer. */
1044 struct gcpro gcpro1
, gcpro2
;
1046 current_dir
= current_buffer
->directory
;
1048 GCPRO2 (buffer
, current_dir
);
1051 expand_and_dir_to_file
1052 (Funhandled_file_name_directory (current_dir
), Qnil
);
1053 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1054 report_file_error ("Setting current directory",
1055 Fcons (current_buffer
->directory
, Qnil
));
1061 CHECK_STRING (name
, 0);
1065 CHECK_STRING (program
, 2);
1068 /* Make a one member argv with all args concatenated
1069 together separated by a blank. */
1070 len
= XSTRING (program
)->size
+ 2;
1071 for (i
= 3; i
< nargs
; i
++)
1074 CHECK_STRING (tem
, i
);
1075 len
+= XSTRING (tem
)->size
+ 1; /* count the blank */
1077 new_argv
= (unsigned char *) alloca (len
);
1078 strcpy (new_argv
, XSTRING (program
)->data
);
1079 for (i
= 3; i
< nargs
; i
++)
1082 CHECK_STRING (tem
, i
);
1083 strcat (new_argv
, " ");
1084 strcat (new_argv
, XSTRING (tem
)->data
);
1086 /* Need to add code here to check for program existence on VMS */
1089 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1091 /* If program file name is not absolute, search our path for it */
1092 if (XSTRING (program
)->data
[0] != '/')
1094 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1097 GCPRO4 (name
, program
, buffer
, current_dir
);
1098 openp (Vexec_path
, program
, EXEC_SUFFIXES
, &tem
, 1);
1101 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1102 new_argv
[0] = XSTRING (tem
)->data
;
1105 new_argv
[0] = XSTRING (program
)->data
;
1107 for (i
= 3; i
< nargs
; i
++)
1110 CHECK_STRING (tem
, i
);
1111 new_argv
[i
- 2] = XSTRING (tem
)->data
;
1113 new_argv
[i
- 2] = 0;
1114 #endif /* not VMS */
1116 proc
= make_process (name
);
1117 /* If an error occurs and we can't start the process, we want to
1118 remove it from the process list. This means that each error
1119 check in create_process doesn't need to call remove_process
1120 itself; it's all taken care of here. */
1121 record_unwind_protect (start_process_unwind
, proc
);
1123 XPROCESS (proc
)->childp
= Qt
;
1124 XPROCESS (proc
)->command_channel_p
= Qnil
;
1125 XPROCESS (proc
)->buffer
= buffer
;
1126 XPROCESS (proc
)->sentinel
= Qnil
;
1127 XPROCESS (proc
)->filter
= Qnil
;
1128 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1130 create_process (proc
, new_argv
, current_dir
);
1132 return unbind_to (count
, proc
);
1135 /* This function is the unwind_protect form for Fstart_process. If
1136 PROC doesn't have its pid set, then we know someone has signalled
1137 an error and the process wasn't started successfully, so we should
1138 remove it from the process list. */
1140 start_process_unwind (proc
)
1143 if (!PROCESSP (proc
))
1146 /* Was PROC started successfully? */
1147 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1148 remove_process (proc
);
1155 create_process_1 (signo
)
1159 /* USG systems forget handlers when they are used;
1160 must reestablish each time */
1161 signal (signo
, create_process_1
);
1165 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1168 /* Mimic blocking of signals on system V, which doesn't really have it. */
1170 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1171 int sigchld_deferred
;
1174 create_process_sigchld ()
1176 signal (SIGCHLD
, create_process_sigchld
);
1178 sigchld_deferred
= 1;
1184 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1185 create_process (process
, new_argv
, current_dir
)
1186 Lisp_Object process
;
1188 Lisp_Object current_dir
;
1190 int pid
, inchannel
, outchannel
, forkin
, forkout
;
1193 SIGTYPE (*sigchld
)();
1196 extern char **environ
;
1198 inchannel
= outchannel
= -1;
1201 if (!NILP (Vprocess_connection_type
))
1202 outchannel
= inchannel
= allocate_pty ();
1207 /* On USG systems it does not work to open the pty's tty here
1208 and then close and reopen it in the child. */
1210 /* Don't let this terminal become our controlling terminal
1211 (in case we don't have one). */
1212 forkout
= forkin
= open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1214 forkout
= forkin
= open (pty_name
, O_RDWR
, 0);
1217 report_file_error ("Opening pty", Qnil
);
1219 forkin
= forkout
= -1;
1220 #endif /* not USG */
1224 #endif /* HAVE_PTYS */
1227 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1228 report_file_error ("Opening socketpair", Qnil
);
1229 outchannel
= inchannel
= sv
[0];
1230 forkout
= forkin
= sv
[1];
1232 #else /* not SKTPAIR */
1241 #endif /* not SKTPAIR */
1244 /* Replaced by close_process_descs */
1245 set_exclusive_use (inchannel
);
1246 set_exclusive_use (outchannel
);
1249 /* Stride people say it's a mystery why this is needed
1250 as well as the O_NDELAY, but that it fails without this. */
1251 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1254 ioctl (inchannel
, FIONBIO
, &one
);
1259 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1262 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1266 /* Record this as an active process, with its channels.
1267 As a result, child_setup will close Emacs's side of the pipes. */
1268 chan_process
[inchannel
] = process
;
1269 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1270 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1271 /* Record the tty descriptor used in the subprocess. */
1273 XPROCESS (process
)->subtty
= Qnil
;
1275 XSETFASTINT (XPROCESS (process
)->subtty
, forkin
);
1276 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1277 XPROCESS (process
)->status
= Qrun
;
1279 /* Delay interrupts until we have a chance to store
1280 the new fork's pid in its process structure */
1284 #else /* not BSD4_1 */
1285 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1286 sigsetmask (sigmask (SIGCHLD
));
1287 #else /* ordinary USG */
1289 sigchld_deferred
= 0;
1290 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1292 #endif /* ordinary USG */
1293 #endif /* not BSD4_1 */
1294 #endif /* SIGCHLD */
1296 FD_SET (inchannel
, &input_wait_mask
);
1297 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1298 if (inchannel
> max_process_desc
)
1299 max_process_desc
= inchannel
;
1301 /* Until we store the proper pid, enable sigchld_handler
1302 to recognize an unknown pid as standing for this process.
1303 It is very important not to let this `marker' value stay
1304 in the table after this function has returned; if it does
1305 it might cause call-process to hang and subsequent asynchronous
1306 processes to get their return values scrambled. */
1307 XSETINT (XPROCESS (process
)->pid
, -1);
1310 /* child_setup must clobber environ on systems with true vfork.
1311 Protect it from permanent change. */
1312 char **save_environ
= environ
;
1317 int xforkin
= forkin
;
1318 int xforkout
= forkout
;
1320 #if 0 /* This was probably a mistake--it duplicates code later on,
1321 but fails to handle all the cases. */
1322 /* Make sure SIGCHLD is not blocked in the child. */
1323 sigsetmask (SIGEMPTYMASK
);
1326 /* Make the pty be the controlling terminal of the process. */
1328 /* First, disconnect its current controlling terminal. */
1330 /* We tried doing setsid only if pty_flag, but it caused
1331 process_set_signal to fail on SGI when using a pipe. */
1333 /* Make the pty's terminal the controlling terminal. */
1337 /* We ignore the return value
1338 because faith@cs.unc.edu says that is necessary on Linux. */
1339 ioctl (xforkin
, TIOCSCTTY
, 0);
1342 #else /* not HAVE_SETSID */
1344 /* It's very important to call setpgrp here and no time
1345 afterwards. Otherwise, we lose our controlling tty which
1346 is set when we open the pty. */
1349 #endif /* not HAVE_SETSID */
1350 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1351 if (pty_flag
&& xforkin
>= 0)
1354 tcgetattr (xforkin
, &t
);
1356 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1357 write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1360 #if defined (NTTYDISC) && defined (TIOCSETD)
1361 if (pty_flag
&& xforkin
>= 0)
1363 /* Use new line discipline. */
1364 int ldisc
= NTTYDISC
;
1365 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1370 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1371 can do TIOCSPGRP only to the process's controlling tty. */
1374 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1375 I can't test it since I don't have 4.3. */
1376 int j
= open ("/dev/tty", O_RDWR
, 0);
1377 ioctl (j
, TIOCNOTTY
, 0);
1380 /* In order to get a controlling terminal on some versions
1381 of BSD, it is necessary to put the process in pgrp 0
1382 before it opens the terminal. */
1386 #endif /* TIOCNOTTY */
1388 #if !defined (RTU) && !defined (UNIPLUS)
1389 /*** There is a suggestion that this ought to be a
1390 conditional on TIOCSPGRP. */
1391 /* Now close the pty (if we had it open) and reopen it.
1392 This makes the pty the controlling terminal of the subprocess. */
1395 #ifdef SET_CHILD_PTY_PGRP
1396 int pgrp
= getpid ();
1399 /* I wonder if close (open (pty_name, ...)) would work? */
1402 xforkout
= xforkin
= open (pty_name
, O_RDWR
, 0);
1404 #ifdef SET_CHILD_PTY_PGRP
1405 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1406 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1412 #endif /* not UNIPLUS and not RTU */
1413 #ifdef SETUP_SLAVE_PTY
1418 #endif /* SETUP_SLAVE_PTY */
1420 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1421 Now reenable it in the child, so it will die when we want it to. */
1423 signal (SIGHUP
, SIG_DFL
);
1425 #endif /* HAVE_PTYS */
1430 #else /* not BSD4_1 */
1431 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1432 sigsetmask (SIGEMPTYMASK
);
1433 #else /* ordinary USG */
1435 signal (SIGCHLD
, sigchld
);
1437 #endif /* ordinary USG */
1438 #endif /* not BSD4_1 */
1439 #endif /* SIGCHLD */
1441 signal (SIGINT
, SIG_DFL
);
1442 signal (SIGQUIT
, SIG_DFL
);
1445 child_setup_tty (xforkout
);
1446 child_setup (xforkin
, xforkout
, xforkout
,
1447 new_argv
, 1, current_dir
);
1449 environ
= save_environ
;
1456 if (forkin
!= forkout
&& forkout
>= 0)
1458 report_file_error ("Doing vfork", Qnil
);
1461 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
1463 /* If the subfork execv fails, and it exits,
1464 this close hangs. I don't know why.
1465 So have an interrupt jar it loose. */
1467 signal (SIGALRM
, create_process_1
);
1469 XPROCESS (process
)->subtty
= Qnil
;
1474 if (forkin
!= forkout
&& forkout
>= 0)
1477 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1482 #else /* not BSD4_1 */
1483 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1484 sigsetmask (SIGEMPTYMASK
);
1485 #else /* ordinary USG */
1487 signal (SIGCHLD
, sigchld
);
1488 /* Now really handle any of these signals
1489 that came in during this function. */
1490 if (sigchld_deferred
)
1491 kill (getpid (), SIGCHLD
);
1493 #endif /* ordinary USG */
1494 #endif /* not BSD4_1 */
1495 #endif /* SIGCHLD */
1497 #endif /* not VMS */
1501 /* open a TCP network connection to a given HOST/SERVICE. Treated
1502 exactly like a normal process when reading and writing. Only
1503 differences are in status display and process deletion. A network
1504 connection has no PID; you cannot signal it. All you can do is
1505 deactivate and close it via delete-process */
1507 DEFUN ("open-network-stream", Fopen_network_stream
, Sopen_network_stream
,
1509 "Open a TCP connection for a service to a host.\n\
1510 Returns a subprocess-object to represent the connection.\n\
1511 Input and output work as for subprocesses; `delete-process' closes it.\n\
1512 Args are NAME BUFFER HOST SERVICE.\n\
1513 NAME is name for process. It is modified if necessary to make it unique.\n\
1514 BUFFER is the buffer (or buffer-name) to associate with the process.\n\
1515 Process output goes at end of that buffer, unless you specify\n\
1516 an output stream or filter function to handle the output.\n\
1517 BUFFER may be also nil, meaning that this process is not associated\n\
1519 Third arg is name of the host to connect to, or its IP address.\n\
1520 Fourth arg SERVICE is name of the service desired, or an integer\n\
1521 specifying a port number to connect to.")
1522 (name
, buffer
, host
, service
)
1523 Lisp_Object name
, buffer
, host
, service
;
1527 struct sockaddr_in address
;
1528 struct servent
*svc_info
;
1529 struct hostent
*host_info_ptr
, host_info
;
1530 char *(addr_list
[2]);
1531 IN_ADDR numeric_addr
;
1535 struct hostent host_info_fixed
;
1536 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1538 int count
= specpdl_ptr
- specpdl
;
1540 GCPRO4 (name
, buffer
, host
, service
);
1541 CHECK_STRING (name
, 0);
1542 CHECK_STRING (host
, 0);
1543 if (INTEGERP (service
))
1544 port
= htons ((unsigned short) XINT (service
));
1547 CHECK_STRING (service
, 0);
1548 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
1550 error ("Unknown service \"%s\"", XSTRING (service
)->data
);
1551 port
= svc_info
->s_port
;
1560 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
1562 if (! (host_info_ptr
== 0 && h_errno
== TRY_AGAIN
))
1565 Fsleep_for (make_number (1), Qnil
);
1567 if (host_info_ptr
== 0)
1568 /* Attempt to interpret host as numeric inet address */
1570 numeric_addr
= inet_addr ((char *) XSTRING (host
)->data
);
1571 if (NUMERIC_ADDR_ERROR
)
1572 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
1574 host_info_ptr
= &host_info
;
1575 host_info
.h_name
= 0;
1576 host_info
.h_aliases
= 0;
1577 host_info
.h_addrtype
= AF_INET
;
1579 /* Older machines have only one address slot called h_addr.
1580 Newer machines have h_addr_list, but #define h_addr to
1581 be its first element. */
1582 host_info
.h_addr_list
= &(addr_list
[0]);
1584 host_info
.h_addr
= (char*)(&numeric_addr
);
1586 host_info
.h_length
= strlen (addr_list
[0]);
1589 bzero (&address
, sizeof address
);
1590 bcopy (host_info_ptr
->h_addr
, (char *) &address
.sin_addr
,
1591 host_info_ptr
->h_length
);
1592 address
.sin_family
= host_info_ptr
->h_addrtype
;
1593 address
.sin_port
= port
;
1595 s
= socket (host_info_ptr
->h_addrtype
, SOCK_STREAM
, 0);
1597 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1599 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
1600 when connect is interrupted. So let's not let it get interrupted.
1601 Note we do not turn off polling, because polling is only used
1602 when not interrupt_input, and thus not normally used on the systems
1603 which have this bug. On systems which use polling, there's no way
1604 to quit if polling is turned off. */
1605 if (interrupt_input
)
1608 /* Slow down polling to every ten seconds.
1609 Some kernels have a bug which causes retrying connect to fail
1611 #ifdef POLL_FOR_INPUT
1612 bind_polling_period (10);
1616 if (connect (s
, (struct sockaddr
*) &address
, sizeof address
) == -1
1617 && errno
!= EISCONN
)
1623 if (errno
== EADDRINUSE
&& retry
< 20)
1631 if (interrupt_input
)
1635 report_file_error ("connection failed",
1636 Fcons (host
, Fcons (name
, Qnil
)));
1639 #ifdef POLL_FOR_INPUT
1640 unbind_to (count
, Qnil
);
1643 if (interrupt_input
)
1647 s
= connect_server (0);
1649 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1650 send_command (s
, C_PORT
, 0, "%s:%d", XSTRING (host
)->data
, ntohs (port
));
1651 send_command (s
, C_DUMB
, 1, 0);
1657 report_file_error ("error duplicating socket", Fcons (name
, Qnil
));
1660 buffer
= Fget_buffer_create (buffer
);
1661 proc
= make_process (name
);
1663 chan_process
[inch
] = proc
;
1666 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
1669 fcntl (inch
, F_SETFL
, O_NDELAY
);
1673 XPROCESS (proc
)->childp
= host
;
1674 XPROCESS (proc
)->command_channel_p
= Qnil
;
1675 XPROCESS (proc
)->buffer
= buffer
;
1676 XPROCESS (proc
)->sentinel
= Qnil
;
1677 XPROCESS (proc
)->filter
= Qnil
;
1678 XPROCESS (proc
)->command
= Qnil
;
1679 XPROCESS (proc
)->pid
= Qnil
;
1680 XSETINT (XPROCESS (proc
)->infd
, s
);
1681 XSETINT (XPROCESS (proc
)->outfd
, outch
);
1682 XPROCESS (proc
)->status
= Qrun
;
1683 FD_SET (inch
, &input_wait_mask
);
1684 FD_SET (inch
, &non_keyboard_wait_mask
);
1685 if (inch
> max_process_desc
)
1686 max_process_desc
= inch
;
1691 #endif /* HAVE_SOCKETS */
1693 deactivate_process (proc
)
1696 register int inchannel
, outchannel
;
1697 register struct Lisp_Process
*p
= XPROCESS (proc
);
1699 inchannel
= XINT (p
->infd
);
1700 outchannel
= XINT (p
->outfd
);
1704 /* Beware SIGCHLD hereabouts. */
1705 flush_pending_output (inchannel
);
1708 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
1709 sys$
dassgn (outchannel
);
1710 vs
= get_vms_process_pointer (p
->pid
);
1712 give_back_vms_process_stuff (vs
);
1716 if (outchannel
>= 0 && outchannel
!= inchannel
)
1720 XSETINT (p
->infd
, -1);
1721 XSETINT (p
->outfd
, -1);
1722 chan_process
[inchannel
] = Qnil
;
1723 FD_CLR (inchannel
, &input_wait_mask
);
1724 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
1725 if (inchannel
== max_process_desc
)
1728 /* We just closed the highest-numbered process input descriptor,
1729 so recompute the highest-numbered one now. */
1730 max_process_desc
= 0;
1731 for (i
= 0; i
< MAXDESC
; i
++)
1732 if (!NILP (chan_process
[i
]))
1733 max_process_desc
= i
;
1738 /* Close all descriptors currently in use for communication
1739 with subprocess. This is used in a newly-forked subprocess
1740 to get rid of irrelevant descriptors. */
1742 close_process_descs ()
1745 for (i
= 0; i
< MAXDESC
; i
++)
1747 Lisp_Object process
;
1748 process
= chan_process
[i
];
1749 if (!NILP (process
))
1751 int in
= XINT (XPROCESS (process
)->infd
);
1752 int out
= XINT (XPROCESS (process
)->outfd
);
1755 if (out
>= 0 && in
!= out
)
1761 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
1763 "Allow any pending output from subprocesses to be read by Emacs.\n\
1764 It is read into the process' buffers or given to their filter functions.\n\
1765 Non-nil arg PROCESS means do not return until some output has been received\n\
1767 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
1768 seconds and microseconds to wait; return after that much time whether\n\
1769 or not there is input.\n\
1770 Return non-nil iff we received any output before the timeout expired.")
1771 (proc
, timeout
, timeout_msecs
)
1772 register Lisp_Object proc
, timeout
, timeout_msecs
;
1777 if (! NILP (timeout_msecs
))
1779 CHECK_NUMBER (timeout_msecs
, 2);
1780 useconds
= XINT (timeout_msecs
);
1781 if (!INTEGERP (timeout
))
1782 XSETINT (timeout
, 0);
1785 int carry
= useconds
/ 1000000;
1787 XSETINT (timeout
, XINT (timeout
) + carry
);
1788 useconds
-= carry
* 1000000;
1790 /* I think this clause is necessary because C doesn't
1791 guarantee a particular rounding direction for negative
1795 XSETINT (timeout
, XINT (timeout
) - 1);
1796 useconds
+= 1000000;
1803 if (! NILP (timeout
))
1805 CHECK_NUMBER (timeout
, 1);
1806 seconds
= XINT (timeout
);
1819 XSETFASTINT (proc
, 0);
1822 (wait_reading_process_input (seconds
, useconds
, proc
, 0)
1826 /* This variable is different from waiting_for_input in keyboard.c.
1827 It is used to communicate to a lisp process-filter/sentinel (via the
1828 function Fwaiting_for_user_input_p below) whether emacs was waiting
1829 for user-input when that process-filter was called.
1830 waiting_for_input cannot be used as that is by definition 0 when
1831 lisp code is being evalled.
1832 This is also used in record_asynch_buffer_change.
1833 For that purpose, this must be 0
1834 when not inside wait_reading_process_input. */
1835 static int waiting_for_user_input_p
;
1837 /* Read and dispose of subprocess output while waiting for timeout to
1838 elapse and/or keyboard input to be available.
1841 timeout in seconds, or
1842 zero for no limit, or
1843 -1 means gobble data immediately available but don't wait for any.
1846 an additional duration to wait, measured in microseconds.
1847 If this is nonzero and time_limit is 0, then the timeout
1848 consists of MICROSECS only.
1850 READ_KBD is a lisp value:
1851 0 to ignore keyboard input, or
1852 1 to return when input is available, or
1853 -1 meaning caller will actually read the input, so don't throw to
1854 the quit handler, or
1855 a cons cell, meaning wait until its car is non-nil
1856 (and gobble terminal input into the buffer if any arrives), or
1857 a process object, meaning wait until something arrives from that
1858 process. The return value is true iff we read some input from
1861 DO_DISPLAY != 0 means redisplay should be done to show subprocess
1862 output that arrives.
1864 If READ_KBD is a pointer to a struct Lisp_Process, then the
1865 function returns true iff we received input from that process
1866 before the timeout elapsed.
1867 Otherwise, return true iff we received input from any process. */
1869 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
1870 int time_limit
, microsecs
;
1871 Lisp_Object read_kbd
;
1874 register int channel
, nfds
, m
;
1875 static SELECT_TYPE Available
;
1878 EMACS_TIME timeout
, end_time
, garbage
;
1880 int wait_channel
= -1;
1881 struct Lisp_Process
*wait_proc
= 0;
1882 int got_some_input
= 0;
1883 Lisp_Object
*wait_for_cell
= 0;
1885 FD_ZERO (&Available
);
1887 /* If read_kbd is a process to watch, set wait_proc and wait_channel
1889 if (PROCESSP (read_kbd
))
1891 wait_proc
= XPROCESS (read_kbd
);
1892 wait_channel
= XINT (wait_proc
->infd
);
1893 XSETFASTINT (read_kbd
, 0);
1896 /* If waiting for non-nil in a cell, record where. */
1897 if (CONSP (read_kbd
))
1899 wait_for_cell
= &XCONS (read_kbd
)->car
;
1900 XSETFASTINT (read_kbd
, 0);
1903 waiting_for_user_input_p
= XINT (read_kbd
);
1905 /* Since we may need to wait several times,
1906 compute the absolute time to return at. */
1907 if (time_limit
|| microsecs
)
1909 EMACS_GET_TIME (end_time
);
1910 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
1911 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
1914 /* It would not be safe to call this below,
1915 where we call redisplay_preserve_echo_area. */
1916 if (do_display
&& frame_garbaged
)
1917 prepare_menu_bars ();
1921 /* If calling from keyboard input, do not quit
1922 since we want to return C-g as an input character.
1923 Otherwise, do pending quit if requested. */
1924 if (XINT (read_kbd
) >= 0)
1927 /* Exit now if the cell we're waiting for became non-nil. */
1928 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
1931 /* Compute time from now till when time limit is up */
1932 /* Exit if already run out */
1933 if (time_limit
== -1)
1935 /* -1 specified for timeout means
1936 gobble output available now
1937 but don't wait at all. */
1939 EMACS_SET_SECS_USECS (timeout
, 0, 0);
1941 else if (time_limit
|| microsecs
)
1943 EMACS_GET_TIME (timeout
);
1944 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
1945 if (EMACS_TIME_NEG_P (timeout
))
1950 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
1953 /* Cause C-g and alarm signals to take immediate action,
1954 and cause input available signals to zero out timeout.
1956 It is important that we do this before checking for process
1957 activity. If we get a SIGCHLD after the explicit checks for
1958 process activity, timeout is the only way we will know. */
1959 if (XINT (read_kbd
) < 0)
1960 set_waiting_for_input (&timeout
);
1962 /* If status of something has changed, and no input is
1963 available, notify the user of the change right away. After
1964 this explicit check, we'll let the SIGCHLD handler zap
1965 timeout to get our attention. */
1966 if (update_tick
!= process_tick
&& do_display
)
1968 Atemp
= input_wait_mask
;
1969 EMACS_SET_SECS_USECS (timeout
, 0, 0);
1970 if (select (MAXDESC
, &Atemp
, 0, 0, &timeout
) <= 0)
1972 /* It's okay for us to do this and then continue with
1973 the loop, since timeout has already been zeroed out. */
1974 clear_waiting_for_input ();
1979 /* Don't wait for output from a non-running process. */
1980 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
1981 update_status (wait_proc
);
1983 && ! EQ (wait_proc
->status
, Qrun
))
1985 clear_waiting_for_input ();
1989 /* Wait till there is something to do */
1991 if (! XINT (read_kbd
) && wait_for_cell
== 0)
1992 Available
= non_keyboard_wait_mask
;
1994 Available
= input_wait_mask
;
1996 /* If frame size has changed or the window is newly mapped,
1997 redisplay now, before we start to wait. There is a race
1998 condition here; if a SIGIO arrives between now and the select
1999 and indicates that a frame is trashed, the select may block
2000 displaying a trashed screen. */
2001 if (frame_garbaged
&& do_display
)
2002 redisplay_preserve_echo_area ();
2004 if (XINT (read_kbd
) && detect_input_pending ())
2007 FD_ZERO (&Available
);
2010 nfds
= select (MAXDESC
, &Available
, 0, 0, &timeout
);
2014 /* Make C-g and alarm signals set flags again */
2015 clear_waiting_for_input ();
2017 /* If we woke up due to SIGWINCH, actually change size now. */
2018 do_pending_window_change ();
2020 if (time_limit
&& nfds
== 0) /* timeout elapsed */
2024 if (xerrno
== EINTR
)
2025 FD_ZERO (&Available
);
2027 /* Ultrix select seems to return ENOMEM when it is
2028 interrupted. Treat it just like EINTR. Bleah. Note
2029 that we want to test for the "ultrix" CPP symbol, not
2030 "__ultrix__"; the latter is only defined under GCC, but
2031 not by DEC's bundled CC. -JimB */
2032 else if (xerrno
== ENOMEM
)
2033 FD_ZERO (&Available
);
2036 /* This happens for no known reason on ALLIANT.
2037 I am guessing that this is the right response. -- RMS. */
2038 else if (xerrno
== EFAULT
)
2039 FD_ZERO (&Available
);
2041 else if (xerrno
== EBADF
)
2044 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
2045 the child's closure of the pts gives the parent a SIGHUP, and
2046 the ptc file descriptor is automatically closed,
2047 yielding EBADF here or at select() call above.
2048 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
2049 in m/ibmrt-aix.h), and here we just ignore the select error.
2050 Cleanup occurs c/o status_notify after SIGCLD. */
2051 FD_ZERO (&Available
); /* Cannot depend on values returned */
2057 error("select error: %s", strerror (xerrno
));
2059 #if defined(sun) && !defined(USG5_4)
2060 else if (nfds
> 0 && keyboard_bit_set (&Available
)
2062 /* System sometimes fails to deliver SIGIO.
2064 David J. Mackenzie says that Emacs doesn't compile under
2065 Solaris if this code is enabled, thus the USG5_4 in the CPP
2066 conditional. "I haven't noticed any ill effects so far.
2067 If you find a Solaris expert somewhere, they might know
2069 kill (getpid (), SIGIO
);
2072 /* Check for keyboard input */
2073 /* If there is any, return immediately
2074 to give it higher priority than subprocesses */
2076 /* We used to do this if wait_for_cell,
2077 but that caused infinite recursion in selection request events. */
2078 if ((XINT (read_kbd
) || wait_for_cell
)
2079 && detect_input_pending ())
2082 if (detect_input_pending ())
2086 /* Exit now if the cell we're waiting for became non-nil. */
2087 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2091 /* If we think we have keyboard input waiting, but didn't get SIGIO
2092 go read it. This can happen with X on BSD after logging out.
2093 In that case, there really is no input and no SIGIO,
2094 but select says there is input. */
2096 if (XINT (read_kbd
) && interrupt_input
2097 && (keyboard_bit_set (&Available
)))
2102 got_some_input
|= nfds
> 0;
2104 /* If checking input just got us a size-change event from X,
2105 obey it now if we should. */
2106 if (XINT (read_kbd
) || wait_for_cell
)
2107 do_pending_window_change ();
2109 /* Check for data from a process. */
2110 /* Really FIRST_PROC_DESC should be 0 on Unix,
2111 but this is safer in the short run. */
2112 for (channel
= 0; channel
<= max_process_desc
; channel
++)
2114 if (FD_ISSET (channel
, &Available
)
2115 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
2119 /* If waiting for this channel, arrange to return as
2120 soon as no more input to be processed. No more
2122 if (wait_channel
== channel
)
2128 proc
= chan_process
[channel
];
2132 /* Read data from the process, starting with our
2133 buffered-ahead character if we have one. */
2135 nread
= read_process_output (proc
, channel
);
2138 /* Since read_process_output can run a filter,
2139 which can call accept-process-output,
2140 don't try to read from any other processes
2141 before doing the select again. */
2142 FD_ZERO (&Available
);
2145 redisplay_preserve_echo_area ();
2148 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2152 else if (nread
== -1 && errno
== EAGAIN
)
2156 else if (nread
== -1 && errno
== EAGAIN
)
2158 /* Note that we cannot distinguish between no input
2159 available now and a closed pipe.
2160 With luck, a closed pipe will be accompanied by
2161 subprocess termination and SIGCHLD. */
2162 else if (nread
== 0 && !NETCONN_P (proc
))
2164 #endif /* O_NDELAY */
2165 #endif /* O_NONBLOCK */
2166 #endif /* EWOULDBLOCK */
2168 /* On some OSs with ptys, when the process on one end of
2169 a pty exits, the other end gets an error reading with
2170 errno = EIO instead of getting an EOF (0 bytes read).
2171 Therefore, if we get an error reading and errno =
2172 EIO, just continue, because the child process has
2173 exited and should clean itself up soon (e.g. when we
2175 else if (nread
== -1 && errno
== EIO
)
2177 #endif /* HAVE_PTYS */
2178 /* If we can detect process termination, don't consider the process
2179 gone just because its pipe is closed. */
2181 else if (nread
== 0 && !NETCONN_P (proc
))
2186 /* Preserve status of processes already terminated. */
2187 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2188 deactivate_process (proc
);
2189 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2190 update_status (XPROCESS (proc
));
2191 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2192 XPROCESS (proc
)->status
2193 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2196 } /* end for each file descriptor */
2197 } /* end while exit conditions not met */
2199 waiting_for_user_input_p
= 0;
2201 /* If calling from keyboard input, do not quit
2202 since we want to return C-g as an input character.
2203 Otherwise, do pending quit if requested. */
2204 if (XINT (read_kbd
) >= 0)
2206 /* Prevent input_pending from remaining set if we quit. */
2207 clear_input_pending ();
2211 return got_some_input
;
2214 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
2217 read_process_output_call (fun_and_args
)
2218 Lisp_Object fun_and_args
;
2220 return apply1 (XCONS (fun_and_args
)->car
, XCONS (fun_and_args
)->cdr
);
2224 read_process_output_error_handler (error
)
2227 cmd_error_internal (error
, "error in process filter: ");
2229 update_echo_area ();
2230 Fsleep_for (make_number (2));
2233 /* Read pending output from the process channel,
2234 starting with our buffered-ahead character if we have one.
2235 Yield number of characters read.
2237 This function reads at most 1024 characters.
2238 If you want to read all available subprocess output,
2239 you must call it repeatedly until it returns zero. */
2241 read_process_output (proc
, channel
)
2243 register int channel
;
2245 register int nchars
;
2251 register Lisp_Object outstream
;
2252 register struct buffer
*old
= current_buffer
;
2253 register struct Lisp_Process
*p
= XPROCESS (proc
);
2254 register int opoint
;
2257 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2259 vs
= get_vms_process_pointer (p
->pid
);
2263 return(0); /* Really weird if it does this */
2264 if (!(vs
->iosb
[0] & 1))
2265 return -1; /* I/O error */
2268 error ("Could not get VMS process pointer");
2269 chars
= vs
->inputBuffer
;
2270 nchars
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2273 start_vms_process_read (vs
); /* Crank up the next read on the process */
2274 return 1; /* Nothing worth printing, say we got 1 */
2278 if (proc_buffered_char
[channel
] < 0)
2279 nchars
= read (channel
, chars
, sizeof chars
);
2282 chars
[0] = proc_buffered_char
[channel
];
2283 proc_buffered_char
[channel
] = -1;
2284 nchars
= read (channel
, chars
+ 1, sizeof chars
- 1);
2288 nchars
= nchars
+ 1;
2290 #endif /* not VMS */
2292 if (nchars
<= 0) return nchars
;
2294 outstream
= p
->filter
;
2295 if (!NILP (outstream
))
2297 /* We inhibit quit here instead of just catching it so that
2298 hitting ^G when a filter happens to be running won't screw
2300 int count
= specpdl_ptr
- specpdl
;
2301 Lisp_Object odeactivate
;
2302 Lisp_Object obuffer
;
2304 odeactivate
= Vdeactivate_mark
;
2305 obuffer
= Fcurrent_buffer ();
2307 specbind (Qinhibit_quit
, Qt
);
2308 specbind (Qlast_nonmenu_event
, Qt
);
2310 internal_condition_case_1 (read_process_output_call
,
2313 Fcons (make_string (chars
, nchars
),
2315 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
2316 read_process_output_error_handler
);
2318 /* Handling the process output should not deactivate the mark. */
2319 Vdeactivate_mark
= odeactivate
;
2321 if (! EQ (Fcurrent_buffer (), obuffer
))
2322 record_asynch_buffer_change ();
2324 if (waiting_for_user_input_p
)
2325 prepare_menu_bars ();
2328 start_vms_process_read (vs
);
2330 unbind_to (count
, Qnil
);
2334 /* If no filter, write into buffer if it isn't dead. */
2335 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2337 Lisp_Object old_read_only
;
2338 Lisp_Object old_begv
, old_zv
;
2339 Lisp_Object odeactivate
;
2341 odeactivate
= Vdeactivate_mark
;
2343 Fset_buffer (p
->buffer
);
2345 old_read_only
= current_buffer
->read_only
;
2346 XSETFASTINT (old_begv
, BEGV
);
2347 XSETFASTINT (old_zv
, ZV
);
2349 current_buffer
->read_only
= Qnil
;
2351 /* Insert new output into buffer
2352 at the current end-of-output marker,
2353 thus preserving logical ordering of input and output. */
2354 if (XMARKER (p
->mark
)->buffer
)
2355 SET_PT (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
));
2359 /* If the output marker is outside of the visible region, save
2360 the restriction and widen. */
2361 if (! (BEGV
<= point
&& point
<= ZV
))
2364 /* Make sure opoint floats ahead of any new text, just as point
2366 if (point
<= opoint
)
2369 /* Insert after old_begv, but before old_zv. */
2370 if (point
< XFASTINT (old_begv
))
2371 XSETFASTINT (old_begv
, XFASTINT (old_begv
) + nchars
);
2372 if (point
<= XFASTINT (old_zv
))
2373 XSETFASTINT (old_zv
, XFASTINT (old_zv
) + nchars
);
2375 /* Insert before markers in case we are inserting where
2376 the buffer's mark is, and the user's next command is Meta-y. */
2377 insert_before_markers (chars
, nchars
);
2378 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
2380 update_mode_lines
++;
2382 /* If the restriction isn't what it should be, set it. */
2383 if (XFASTINT (old_begv
) != BEGV
|| XFASTINT (old_zv
) != ZV
)
2384 Fnarrow_to_region (old_begv
, old_zv
);
2386 /* Handling the process output should not deactivate the mark. */
2387 Vdeactivate_mark
= odeactivate
;
2389 current_buffer
->read_only
= old_read_only
;
2391 set_buffer_internal (old
);
2394 start_vms_process_read (vs
);
2399 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
2401 "Returns non-nil if emacs is waiting for input from the user.\n\
2402 This is intended for use by asynchronous process output filters and sentinels.")
2405 return (waiting_for_user_input_p
? Qt
: Qnil
);
2408 /* Sending data to subprocess */
2410 jmp_buf send_process_frame
;
2413 send_process_trap ()
2419 longjmp (send_process_frame
, 1);
2422 /* Send some data to process PROC.
2423 BUF is the beginning of the data; LEN is the number of characters.
2424 OBJECT is the Lisp object that the data comes from. */
2426 send_process (proc
, buf
, len
, object
)
2432 /* Don't use register vars; longjmp can lose them. */
2434 unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
2437 struct Lisp_Process
*p
= XPROCESS (proc
);
2438 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2441 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2442 update_status (XPROCESS (proc
));
2443 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2444 error ("Process %s not running", procname
);
2447 vs
= get_vms_process_pointer (p
->pid
);
2449 error ("Could not find this process: %x", p
->pid
);
2450 else if (write_to_vms_process (vs
, buf
, len
))
2454 if (pty_max_bytes
== 0)
2456 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
2457 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
2459 if (pty_max_bytes
< 0)
2460 pty_max_bytes
= 250;
2462 pty_max_bytes
= 250;
2464 /* Deduct one, to leave space for the eof. */
2468 if (!setjmp (send_process_frame
))
2472 SIGTYPE (*old_sigpipe
)();
2475 /* Decide how much data we can send in one batch.
2476 Long lines need to be split into multiple batches. */
2477 if (!NILP (XPROCESS (proc
)->pty_flag
))
2479 /* Starting this at zero is always correct when not the first iteration
2480 because the previous iteration ended by sending C-d.
2481 It may not be correct for the first iteration
2482 if a partial line was sent in a separate send_process call.
2483 If that proves worth handling, we need to save linepos
2484 in the process object. */
2487 char *end
= buf
+ len
;
2489 /* Scan through this text for a line that is too long. */
2490 while (ptr
!= end
&& linepos
< pty_max_bytes
)
2498 /* If we found one, break the line there
2499 and put in a C-d to force the buffer through. */
2503 /* Send this batch, using one or more write calls. */
2506 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
2507 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
2508 signal (SIGPIPE
, old_sigpipe
);
2514 || errno
== EWOULDBLOCK
2520 /* Buffer is full. Wait, accepting input;
2521 that may allow the program
2522 to finish doing output and read more. */
2527 /* Running filters might relocate buffers or strings.
2528 Arrange to relocate BUF. */
2529 if (BUFFERP (object
))
2530 offset
= BUF_PTR_CHAR_POS (XBUFFER (object
),
2531 (unsigned char *) buf
);
2532 else if (STRINGP (object
))
2533 offset
= buf
- (char *) XSTRING (object
)->data
;
2535 XSETFASTINT (zero
, 0);
2536 wait_reading_process_input (1, 0, zero
, 0);
2538 if (BUFFERP (object
))
2539 buf
= (char *) BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
2540 else if (STRINGP (object
))
2541 buf
= offset
+ (char *) XSTRING (object
)->data
;
2546 /* This is a real error. */
2547 report_file_error ("writing to process", Fcons (proc
, Qnil
));
2554 /* If we sent just part of the string, put in an EOF
2555 to force it through, before we send the rest. */
2557 Fprocess_send_eof (proc
);
2562 XPROCESS (proc
)->raw_status_low
= Qnil
;
2563 XPROCESS (proc
)->raw_status_high
= Qnil
;
2564 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2565 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2566 deactivate_process (proc
);
2568 error ("Error writing to process %s; closed it", procname
);
2570 error ("SIGPIPE raised on process %s; closed it", procname
);
2575 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
2577 "Send current contents of region as input to PROCESS.\n\
2578 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2579 nil, indicating the current buffer's process.\n\
2580 Called from program, takes three arguments, PROCESS, START and END.\n\
2581 If the region is more than 500 characters long,\n\
2582 it is sent in several bunches. This may happen even for shorter regions.\n\
2583 Output from processes can arrive in between bunches.")
2584 (process
, start
, end
)
2585 Lisp_Object process
, start
, end
;
2590 proc
= get_process (process
);
2591 validate_region (&start
, &end
);
2593 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
2596 start1
= XINT (start
);
2597 send_process (proc
, &FETCH_CHAR (start1
), XINT (end
) - XINT (start
),
2598 Fcurrent_buffer ());
2603 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
2605 "Send PROCESS the contents of STRING as input.\n\
2606 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2607 nil, indicating the current buffer's process.\n\
2608 If STRING is more than 500 characters long,\n\
2609 it is sent in several bunches. This may happen even for shorter strings.\n\
2610 Output from processes can arrive in between bunches.")
2612 Lisp_Object process
, string
;
2615 CHECK_STRING (string
, 1);
2616 proc
= get_process (process
);
2617 send_process (proc
, XSTRING (string
)->data
, XSTRING (string
)->size
, string
);
2621 /* send a signal number SIGNO to PROCESS.
2622 CURRENT_GROUP means send to the process group that currently owns
2623 the terminal being used to communicate with PROCESS.
2624 This is used for various commands in shell mode.
2625 If NOMSG is zero, insert signal-announcements into process's buffers
2628 If we can, we try to signal PROCESS by sending control characters
2629 down the pty. This allows us to signal inferiors who have changed
2630 their uid, for which killpg would return an EPERM error. */
2633 process_send_signal (process
, signo
, current_group
, nomsg
)
2634 Lisp_Object process
;
2636 Lisp_Object current_group
;
2640 register struct Lisp_Process
*p
;
2644 proc
= get_process (process
);
2645 p
= XPROCESS (proc
);
2647 if (!EQ (p
->childp
, Qt
))
2648 error ("Process %s is not a subprocess",
2649 XSTRING (p
->name
)->data
);
2650 if (XINT (p
->infd
) < 0)
2651 error ("Process %s is not active",
2652 XSTRING (p
->name
)->data
);
2654 if (NILP (p
->pty_flag
))
2655 current_group
= Qnil
;
2657 /* If we are using pgrps, get a pgrp number and make it negative. */
2658 if (!NILP (current_group
))
2660 #ifdef SIGNALS_VIA_CHARACTERS
2661 /* If possible, send signals to the entire pgrp
2662 by sending an input character to it. */
2664 /* TERMIOS is the latest and bestest, and seems most likely to
2665 work. If the system has it, use it. */
2672 tcgetattr (XINT (p
->infd
), &t
);
2673 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2677 tcgetattr (XINT (p
->infd
), &t
);
2678 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2682 tcgetattr (XINT (p
->infd
), &t
);
2683 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
2684 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2686 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
2691 #else /* ! HAVE_TERMIOS */
2693 /* On Berkeley descendants, the following IOCTL's retrieve the
2694 current control characters. */
2695 #if defined (TIOCGLTC) && defined (TIOCGETC)
2703 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2704 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
2707 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2708 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
2712 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
2713 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
2715 #endif /* ! defined (SIGTSTP) */
2718 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2720 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
2727 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2728 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2731 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2732 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2736 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2737 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2739 #endif /* ! defined (SIGTSTP) */
2741 #else /* ! defined (TCGETA) */
2742 Your configuration files are messed up
.
2743 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
2744 you'd better be using one of the alternatives above! */
2745 #endif /* ! defined (TCGETA) */
2746 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2747 #endif /* ! defined HAVE_TERMIOS */
2748 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
2751 /* Get the pgrp using the tty itself, if we have that.
2752 Otherwise, use the pty to get the pgrp.
2753 On pfa systems, saka@pfu.fujitsu.co.JP writes:
2754 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
2755 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
2756 His patch indicates that if TIOCGPGRP returns an error, then
2757 we should just assume that p->pid is also the process group id. */
2761 if (!NILP (p
->subtty
))
2762 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
2764 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
2768 gid
= - XFASTINT (p
->pid
);
2769 #endif /* ! defined (pfa) */
2775 #else /* ! defined (TIOCGPGRP ) */
2776 /* Can't select pgrps on this system, so we know that
2777 the child itself heads the pgrp. */
2778 gid
= - XFASTINT (p
->pid
);
2779 #endif /* ! defined (TIOCGPGRP ) */
2782 gid
= - XFASTINT (p
->pid
);
2788 p
->raw_status_low
= Qnil
;
2789 p
->raw_status_high
= Qnil
;
2791 XSETINT (p
->tick
, ++process_tick
);
2795 #endif /* ! defined (SIGCONT) */
2798 send_process (proc
, "\003", 1, Qnil
); /* ^C */
2803 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
2808 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
2811 flush_pending_output (XINT (p
->infd
));
2815 /* If we don't have process groups, send the signal to the immediate
2816 subprocess. That isn't really right, but it's better than any
2817 obvious alternative. */
2820 kill (XFASTINT (p
->pid
), signo
);
2824 /* gid may be a pid, or minus a pgrp's number */
2826 if (!NILP (current_group
))
2827 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
2830 gid
= - XFASTINT (p
->pid
);
2833 #else /* ! defined (TIOCSIGSEND) */
2834 EMACS_KILLPG (-gid
, signo
);
2835 #endif /* ! defined (TIOCSIGSEND) */
2838 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
2839 "Interrupt process PROCESS. May be process or name of one.\n\
2840 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
2841 nil or no arg means current buffer's process.\n\
2842 Second arg CURRENT-GROUP non-nil means send signal to\n\
2843 the current process-group of the process's controlling terminal\n\
2844 rather than to the process's own process group.\n\
2845 If the process is a shell, this means interrupt current subjob\n\
2846 rather than the shell.")
2847 (process
, current_group
)
2848 Lisp_Object process
, current_group
;
2850 process_send_signal (process
, SIGINT
, current_group
, 0);
2854 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
2855 "Kill process PROCESS. May be process or name of one.\n\
2856 See function `interrupt-process' for more details on usage.")
2857 (process
, current_group
)
2858 Lisp_Object process
, current_group
;
2860 process_send_signal (process
, SIGKILL
, current_group
, 0);
2864 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
2865 "Send QUIT signal to process PROCESS. May be process or name of one.\n\
2866 See function `interrupt-process' for more details on usage.")
2867 (process
, current_group
)
2868 Lisp_Object process
, current_group
;
2870 process_send_signal (process
, SIGQUIT
, current_group
, 0);
2874 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
2875 "Stop process PROCESS. May be process or name of one.\n\
2876 See function `interrupt-process' for more details on usage.")
2877 (process
, current_group
)
2878 Lisp_Object process
, current_group
;
2881 error ("no SIGTSTP support");
2883 process_send_signal (process
, SIGTSTP
, current_group
, 0);
2888 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
2889 "Continue process PROCESS. May be process or name of one.\n\
2890 See function `interrupt-process' for more details on usage.")
2891 (process
, current_group
)
2892 Lisp_Object process
, current_group
;
2895 process_send_signal (process
, SIGCONT
, current_group
, 0);
2897 error ("no SIGCONT support");
2902 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
2903 2, 2, "nProcess number: \nnSignal code: ",
2904 "Send the process with number PID the signal with code CODE.\n\
2905 Both PID and CODE are integers.")
2907 Lisp_Object pid
, sig
;
2909 CHECK_NUMBER (pid
, 0);
2910 CHECK_NUMBER (sig
, 1);
2911 return make_number (kill (XINT (pid
), XINT (sig
)));
2914 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
2915 "Make PROCESS see end-of-file in its input.\n\
2916 Eof comes after any text already sent to it.\n\
2917 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2918 nil, indicating the current buffer's process.\n\
2919 If PROCESS is a network connection, or is a process communicating\n\
2920 through a pipe (as opposed to a pty), then you cannot send any more\n\
2921 text to PROCESS after you call this function.")
2923 Lisp_Object process
;
2927 proc
= get_process (process
);
2929 /* Make sure the process is really alive. */
2930 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2931 update_status (XPROCESS (proc
));
2932 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2933 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
2936 send_process (proc
, "\032", 1, Qnil
); /* ^z */
2938 if (!NILP (XPROCESS (proc
)->pty_flag
))
2939 send_process (proc
, "\004", 1, Qnil
);
2942 close (XINT (XPROCESS (proc
)->outfd
));
2943 XSETINT (XPROCESS (proc
)->outfd
, open (NULL_DEVICE
, O_WRONLY
));
2949 /* Kill all processes associated with `buffer'.
2950 If `buffer' is nil, kill all processes */
2952 kill_buffer_processes (buffer
)
2955 Lisp_Object tail
, proc
;
2957 for (tail
= Vprocess_alist
; XGCTYPE (tail
) == Lisp_Cons
;
2958 tail
= XCONS (tail
)->cdr
)
2960 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
2961 if (XGCTYPE (proc
) == Lisp_Process
2962 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
2964 if (NETCONN_P (proc
))
2965 Fdelete_process (proc
);
2966 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
2967 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
2972 /* On receipt of a signal that a child status has changed,
2973 loop asking about children with changed statuses until
2974 the system says there are no more.
2975 All we do is change the status;
2976 we do not run sentinels or print notifications.
2977 That is saved for the next time keyboard input is done,
2978 in order to avoid timing errors. */
2980 /** WARNING: this can be called during garbage collection.
2981 Therefore, it must not be fooled by the presence of mark bits in
2984 /** USG WARNING: Although it is not obvious from the documentation
2985 in signal(2), on a USG system the SIGCLD handler MUST NOT call
2986 signal() before executing at least one wait(), otherwise the handler
2987 will be called again, resulting in an infinite loop. The relevant
2988 portion of the documentation reads "SIGCLD signals will be queued
2989 and the signal-catching function will be continually reentered until
2990 the queue is empty". Invoking signal() causes the kernel to reexamine
2991 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
2994 sigchld_handler (signo
)
2997 int old_errno
= errno
;
2999 register struct Lisp_Process
*p
;
3000 extern EMACS_TIME
*input_available_clear_time
;
3004 sigheld
|= sigbit (SIGCHLD
);
3016 #endif /* no WUNTRACED */
3017 /* Keep trying to get a status until we get a definitive result. */
3021 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
3023 while (pid
<= 0 && errno
== EINTR
);
3027 /* A real failure. We have done all our job, so return. */
3029 /* USG systems forget handlers when they are used;
3030 must reestablish each time */
3032 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
3035 sigheld
&= ~sigbit (SIGCHLD
);
3043 #endif /* no WNOHANG */
3045 /* Find the process that signaled us, and record its status. */
3048 for (tail
= Vprocess_alist
; XSYMBOL (tail
) != XSYMBOL (Qnil
); tail
= XCONS (tail
)->cdr
)
3050 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3051 p
= XPROCESS (proc
);
3052 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
3057 /* Look for an asynchronous process whose pid hasn't been filled
3060 for (tail
= Vprocess_alist
; XSYMBOL (tail
) != XSYMBOL (Qnil
); tail
= XCONS (tail
)->cdr
)
3062 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3063 p
= XPROCESS (proc
);
3064 if (INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
3069 /* Change the status of the process that was found. */
3072 union { int i
; WAITTYPE wt
; } u
;
3074 XSETINT (p
->tick
, ++process_tick
);
3076 XSETFASTINT (p
->raw_status_low
, u
.i
& 0xffff);
3077 XSETFASTINT (p
->raw_status_high
, u
.i
>> 16);
3079 /* If process has terminated, stop waiting for its output. */
3080 if (WIFSIGNALED (w
) || WIFEXITED (w
))
3081 if (XINT (p
->infd
) >= 0)
3083 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
3084 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
3087 /* Tell wait_reading_process_input that it needs to wake up and
3089 if (input_available_clear_time
)
3090 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3093 /* There was no asynchronous process found for that id. Check
3094 if we have a synchronous process. */
3097 synch_process_alive
= 0;
3099 /* Report the status of the synchronous process. */
3101 synch_process_retcode
= WRETCODE (w
);
3102 else if (WIFSIGNALED (w
))
3104 int code
= WTERMSIG (w
);
3110 signame
= sys_siglist
[code
];
3112 signame
= sys_errlist
[code
];
3116 signame
= "unknown";
3118 synch_process_death
= signame
;
3121 /* Tell wait_reading_process_input that it needs to wake up and
3123 if (input_available_clear_time
)
3124 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3127 /* On some systems, we must return right away.
3128 If any more processes want to signal us, we will
3130 Otherwise (on systems that have WNOHANG), loop around
3131 to use up all the processes that have something to tell us. */
3132 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG))
3134 signal (signo
, sigchld_handler
);
3138 #endif /* USG, but not HPUX with WNOHANG */
3144 exec_sentinel_unwind (data
)
3147 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
3152 exec_sentinel_error_handler (error
)
3155 cmd_error_internal (error
, "error in process sentinel: ");
3157 update_echo_area ();
3158 Fsleep_for (make_number (2));
3162 exec_sentinel (proc
, reason
)
3163 Lisp_Object proc
, reason
;
3165 Lisp_Object sentinel
, obuffer
, odeactivate
;
3166 register struct Lisp_Process
*p
= XPROCESS (proc
);
3167 int count
= specpdl_ptr
- specpdl
;
3169 odeactivate
= Vdeactivate_mark
;
3170 obuffer
= Fcurrent_buffer ();
3171 sentinel
= p
->sentinel
;
3172 if (NILP (sentinel
))
3175 /* Zilch the sentinel while it's running, to avoid recursive invocations;
3176 assure that it gets restored no matter how the sentinel exits. */
3178 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
3179 /* Inhibit quit so that random quits don't screw up a running filter. */
3180 specbind (Qinhibit_quit
, Qt
);
3181 specbind (Qlast_nonmenu_event
, Qt
);
3183 internal_condition_case_1 (read_process_output_call
,
3185 Fcons (proc
, Fcons (reason
, Qnil
))),
3186 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
3187 exec_sentinel_error_handler
);
3189 Vdeactivate_mark
= odeactivate
;
3190 if (! EQ (Fcurrent_buffer (), obuffer
))
3191 record_asynch_buffer_change ();
3193 if (waiting_for_user_input_p
)
3194 prepare_menu_bars ();
3195 unbind_to (count
, Qnil
);
3198 /* Report all recent events of a change in process status
3199 (either run the sentinel or output a message).
3200 This is done while Emacs is waiting for keyboard input. */
3204 register Lisp_Object proc
, buffer
;
3205 Lisp_Object tail
, msg
;
3206 struct gcpro gcpro1
, gcpro2
;
3210 /* We need to gcpro tail; if read_process_output calls a filter
3211 which deletes a process and removes the cons to which tail points
3212 from Vprocess_alist, and then causes a GC, tail is an unprotected
3216 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
3219 register struct Lisp_Process
*p
;
3221 proc
= Fcdr (Fcar (tail
));
3222 p
= XPROCESS (proc
);
3224 if (XINT (p
->tick
) != XINT (p
->update_tick
))
3226 XSETINT (p
->update_tick
, XINT (p
->tick
));
3228 /* If process is still active, read any output that remains. */
3229 if (XINT (p
->infd
) >= 0)
3230 while (! EQ (p
->filter
, Qt
)
3231 && read_process_output (proc
, XINT (p
->infd
)) > 0);
3235 /* Get the text to use for the message. */
3236 if (!NILP (p
->raw_status_low
))
3238 msg
= status_message (p
->status
);
3240 /* If process is terminated, deactivate it or delete it. */
3242 if (CONSP (p
->status
))
3243 symbol
= XCONS (p
->status
)->car
;
3245 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
3246 || EQ (symbol
, Qclosed
))
3248 if (delete_exited_processes
)
3249 remove_process (proc
);
3251 deactivate_process (proc
);
3254 /* Now output the message suitably. */
3255 if (!NILP (p
->sentinel
))
3256 exec_sentinel (proc
, msg
);
3257 /* Don't bother with a message in the buffer
3258 when a process becomes runnable. */
3259 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
3261 Lisp_Object ro
, tem
;
3262 struct buffer
*old
= current_buffer
;
3265 ro
= XBUFFER (buffer
)->read_only
;
3267 /* Avoid error if buffer is deleted
3268 (probably that's why the process is dead, too) */
3269 if (NILP (XBUFFER (buffer
)->name
))
3271 Fset_buffer (buffer
);
3273 /* Insert new output into buffer
3274 at the current end-of-output marker,
3275 thus preserving logical ordering of input and output. */
3276 if (XMARKER (p
->mark
)->buffer
)
3277 SET_PT (marker_position (p
->mark
));
3280 if (point
<= opoint
)
3281 opoint
+= XSTRING (msg
)->size
+ XSTRING (p
->name
)->size
+ 10;
3283 tem
= current_buffer
->read_only
;
3284 current_buffer
->read_only
= Qnil
;
3285 insert_string ("\nProcess ");
3286 Finsert (1, &p
->name
);
3287 insert_string (" ");
3289 current_buffer
->read_only
= tem
;
3290 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
3293 set_buffer_internal (old
);
3298 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
3299 redisplay_preserve_echo_area ();
3301 update_tick
= process_tick
;
3306 /* The first time this is called, assume keyboard input comes from DESC
3307 instead of from where we used to expect it.
3308 Subsequent calls mean assume input keyboard can come from DESC
3309 in addition to other places. */
3311 static int add_keyboard_wait_descriptor_called_flag
;
3314 add_keyboard_wait_descriptor (desc
)
3317 if (! add_keyboard_wait_descriptor_called_flag
)
3318 FD_CLR (0, &input_wait_mask
);
3319 add_keyboard_wait_descriptor_called_flag
= 1;
3320 FD_SET (desc
, &input_wait_mask
);
3321 if (desc
> max_keyboard_desc
)
3322 max_keyboard_desc
= desc
;
3325 /* From now on, do not expect DESC to give keyboard input. */
3328 delete_keyboard_wait_descriptor (desc
)
3332 int lim
= max_keyboard_desc
;
3334 FD_CLR (desc
, &input_wait_mask
);
3336 if (desc
== max_keyboard_desc
)
3337 for (fd
= 0; fd
< lim
; fd
++)
3338 if (FD_ISSET (fd
, &input_wait_mask
)
3339 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3340 max_keyboard_desc
= fd
;
3343 /* Return nonzero if *MASK has a bit set
3344 that corresponds to one of the keyboard input descriptors. */
3347 keyboard_bit_set (mask
)
3352 for (fd
= 0; fd
< max_keyboard_desc
; fd
++)
3353 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
3354 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3366 if (! noninteractive
|| initialized
)
3368 signal (SIGCHLD
, sigchld_handler
);
3371 FD_ZERO (&input_wait_mask
);
3372 FD_ZERO (&non_keyboard_wait_mask
);
3373 max_process_desc
= 0;
3375 FD_SET (0, &input_wait_mask
);
3377 Vprocess_alist
= Qnil
;
3378 for (i
= 0; i
< MAXDESC
; i
++)
3380 chan_process
[i
] = Qnil
;
3381 proc_buffered_char
[i
] = -1;
3388 stream_process
= intern ("stream");
3390 Qprocessp
= intern ("processp");
3391 staticpro (&Qprocessp
);
3392 Qrun
= intern ("run");
3394 Qstop
= intern ("stop");
3396 Qsignal
= intern ("signal");
3397 staticpro (&Qsignal
);
3399 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
3402 Qexit = intern ("exit");
3403 staticpro (&Qexit); */
3405 Qopen
= intern ("open");
3407 Qclosed
= intern ("closed");
3408 staticpro (&Qclosed
);
3410 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
3411 staticpro (&Qlast_nonmenu_event
);
3413 staticpro (&Vprocess_alist
);
3415 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
3416 "*Non-nil means delete processes immediately when they exit.\n\
3417 nil means don't delete them until `list-processes' is run.");
3419 delete_exited_processes
= 1;
3421 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
3422 "Control type of device used to communicate with subprocesses.\n\
3423 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
3424 The value has no effect if the system has no ptys or if all ptys are busy:\n\
3425 then a pipe is used in any case.\n\
3426 The value takes effect when `start-process' is called.");
3427 Vprocess_connection_type
= Qt
;
3429 defsubr (&Sprocessp
);
3430 defsubr (&Sget_process
);
3431 defsubr (&Sget_buffer_process
);
3432 defsubr (&Sdelete_process
);
3433 defsubr (&Sprocess_status
);
3434 defsubr (&Sprocess_exit_status
);
3435 defsubr (&Sprocess_id
);
3436 defsubr (&Sprocess_name
);
3437 defsubr (&Sprocess_tty_name
);
3438 defsubr (&Sprocess_command
);
3439 defsubr (&Sset_process_buffer
);
3440 defsubr (&Sprocess_buffer
);
3441 defsubr (&Sprocess_mark
);
3442 defsubr (&Sset_process_filter
);
3443 defsubr (&Sprocess_filter
);
3444 defsubr (&Sset_process_sentinel
);
3445 defsubr (&Sset_process_window_size
);
3446 defsubr (&Sprocess_sentinel
);
3447 defsubr (&Sprocess_kill_without_query
);
3448 defsubr (&Slist_processes
);
3449 defsubr (&Sprocess_list
);
3450 defsubr (&Sstart_process
);
3452 defsubr (&Sopen_network_stream
);
3453 #endif /* HAVE_SOCKETS */
3454 defsubr (&Saccept_process_output
);
3455 defsubr (&Sprocess_send_region
);
3456 defsubr (&Sprocess_send_string
);
3457 defsubr (&Sinterrupt_process
);
3458 defsubr (&Skill_process
);
3459 defsubr (&Squit_process
);
3460 defsubr (&Sstop_process
);
3461 defsubr (&Scontinue_process
);
3462 defsubr (&Sprocess_send_eof
);
3463 defsubr (&Ssignal_process
);
3464 defsubr (&Swaiting_for_user_input_p
);
3465 /* defsubr (&Sprocess_connection); */
3469 #else /* not subprocesses */
3471 #include <sys/types.h>
3475 #include "systime.h"
3476 #include "termopts.h"
3478 extern int frame_garbaged
;
3481 /* As described above, except assuming that there are no subprocesses:
3483 Wait for timeout to elapse and/or keyboard input to be available.
3486 timeout in seconds, or
3487 zero for no limit, or
3488 -1 means gobble data immediately available but don't wait for any.
3490 read_kbd is a Lisp_Object:
3491 0 to ignore keyboard input, or
3492 1 to return when input is available, or
3493 -1 means caller will actually read the input, so don't throw to
3495 We know that read_kbd will never be a Lisp_Process, since
3496 `subprocesses' isn't defined.
3498 do_display != 0 means redisplay should be done to show subprocess
3499 output that arrives.
3501 Return true iff we received input from any process. */
3504 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
3505 int time_limit
, microsecs
;
3506 Lisp_Object read_kbd
;
3509 EMACS_TIME end_time
, timeout
, *timeout_p
;
3512 /* What does time_limit really mean? */
3513 if (time_limit
|| microsecs
)
3515 /* It's not infinite. */
3516 timeout_p
= &timeout
;
3518 if (time_limit
== -1)
3519 /* In fact, it's zero. */
3520 EMACS_SET_SECS_USECS (timeout
, 0, 0);
3522 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
3524 /* How far in the future is that? */
3525 EMACS_GET_TIME (end_time
);
3526 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
3529 /* It's infinite. */
3532 /* This must come before stop_polling. */
3533 prepare_menu_bars ();
3535 /* Turn off periodic alarms (in case they are in use)
3536 because the select emulator uses alarms. */
3543 waitchannels
= XINT (read_kbd
) ? 1 : 0;
3545 /* If calling from keyboard input, do not quit
3546 since we want to return C-g as an input character.
3547 Otherwise, do pending quit if requested. */
3548 if (XINT (read_kbd
) >= 0)
3553 EMACS_GET_TIME (*timeout_p
);
3554 EMACS_SUB_TIME (*timeout_p
, end_time
, *timeout_p
);
3555 if (EMACS_TIME_NEG_P (*timeout_p
))
3559 /* Cause C-g and alarm signals to take immediate action,
3560 and cause input available signals to zero out timeout. */
3561 if (XINT (read_kbd
) < 0)
3562 set_waiting_for_input (&timeout
);
3564 /* If a frame has been newly mapped and needs updating,
3565 reprocess its display stuff. */
3566 if (frame_garbaged
&& do_display
)
3567 redisplay_preserve_echo_area ();
3569 if (XINT (read_kbd
) && detect_input_pending ())
3572 nfds
= select (1, &waitchannels
, 0, 0, timeout_p
);
3574 /* Make C-g and alarm signals set flags again */
3575 clear_waiting_for_input ();
3577 /* If we woke up due to SIGWINCH, actually change size now. */
3578 do_pending_window_change ();
3582 /* If the system call was interrupted, then go around the
3588 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
3589 /* System sometimes fails to deliver SIGIO. */
3590 kill (getpid (), SIGIO
);
3593 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
3597 /* If we have timed out (nfds == 0) or found some input (nfds > 0),
3609 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
3610 /* Don't confuse make-docfile by having two doc strings for this function.
3611 make-docfile does not pay attention to #if, for good reason! */
3614 register Lisp_Object name
;
3619 /* Kill all processes associated with `buffer'.
3620 If `buffer' is nil, kill all processes.
3621 Since we have no subprocesses, this does nothing. */
3623 kill_buffer_processes (buffer
)
3634 defsubr (&Sget_buffer_process
);
3638 #endif /* not subprocesses */