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 */
48 #endif /* not WINDOWSNT */
50 #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */
51 #include <sys/socket.h>
53 #include <netinet/in.h>
54 #include <arpa/inet.h>
55 #endif /* HAVE_SOCKETS */
57 /* TERM is a poor-man's SLIP, used on Linux. */
62 /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */
63 #ifdef HAVE_BROKEN_INET_ADDR
64 #define IN_ADDR struct in_addr
65 #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1)
67 #define IN_ADDR unsigned long
68 #define NUMERIC_ADDR_ERROR (numeric_addr == -1)
71 #if defined(BSD) || defined(STRIDE)
72 #include <sys/ioctl.h>
73 #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5)
75 #endif /* HAVE_PTYS and no O_NDELAY */
76 #endif /* BSD or STRIDE */
78 #ifdef BROKEN_O_NONBLOCK
80 #endif /* BROKEN_O_NONBLOCK */
87 #include <sys/sysmacros.h> /* for "minor" */
97 #include "termhooks.h"
102 Lisp_Object Qprocessp
;
103 Lisp_Object Qrun
, Qstop
, Qsignal
, Qopen
, Qclosed
;
104 Lisp_Object Qlast_nonmenu_event
;
105 /* Qexit is declared and initialized in eval.c. */
107 /* a process object is a network connection when its childp field is neither
108 Qt nor Qnil but is instead a string (name of foreign host we
109 are connected to + name of port we are connected to) */
112 static Lisp_Object stream_process
;
114 #define NETCONN_P(p) (GC_STRINGP (XPROCESS (p)->childp))
116 #define NETCONN_P(p) 0
117 #endif /* HAVE_SOCKETS */
119 /* Define first descriptor number available for subprocesses. */
121 #define FIRST_PROC_DESC 1
123 #define FIRST_PROC_DESC 3
126 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
129 #if !defined (SIGCHLD) && defined (SIGCLD)
130 #define SIGCHLD SIGCLD
133 #include "syssignal.h"
138 extern char *strerror ();
140 extern char *sys_errlist
[];
147 #ifndef SYS_SIGLIST_DECLARED
152 extern char *sys_siglist
[];
153 #endif /* not LINUX */
155 char *sys_siglist
[] =
161 "illegal instruction",
165 "floating point exception",
168 "segmentation violation",
169 "bad argument to system call",
170 "write on a pipe with no one to read it",
172 "software termination signal from kill",
174 "sendable stop signal not from tty",
175 "stop signal from tty",
176 "continue a stopped process",
177 "child status has changed",
178 "background read attempted from control tty",
179 "background write attempted from control tty",
180 "input record available at control tty",
181 "exceeded CPU time limit",
182 "exceeded file size limit"
184 #endif /* not WINDOWSNT */
187 #endif /* ! SYS_SIGLIST_DECLARED */
189 /* t means use pty, nil means use a pipe,
190 maybe other values to come. */
191 static Lisp_Object Vprocess_connection_type
;
195 #include <sys/socket.h>
199 /* Number of events of change of status of a process. */
200 static int process_tick
;
202 /* Number of events for which the user or sentinel has been notified. */
203 static int update_tick
;
206 /* We could get this from param.h, but better not to depend on finding that.
207 And better not to risk that it might define other symbols used in this
210 #define MAXDESC FD_SETSIZE
214 #define SELECT_TYPE fd_set
215 #else /* no FD_SET */
217 #define SELECT_TYPE int
219 /* Define the macros to access a single-int bitmap of descriptors. */
220 #define FD_SET(n, p) (*(p) |= (1 << (n)))
221 #define FD_CLR(n, p) (*(p) &= ~(1 << (n)))
222 #define FD_ISSET(n, p) (*(p) & (1 << (n)))
223 #define FD_ZERO(p) (*(p) = 0)
224 #endif /* no FD_SET */
226 /* If we support X Windows, turn on the code to poll periodically
227 to detect C-g. It isn't actually used when doing interrupt input. */
228 #ifdef HAVE_X_WINDOWS
229 #define POLL_FOR_INPUT
232 /* Mask of bits indicating the descriptors that we wait for input on. */
234 static SELECT_TYPE input_wait_mask
;
236 /* Mask that excludes keyboard input descriptor (s). */
238 static SELECT_TYPE non_keyboard_wait_mask
;
240 /* The largest descriptor currently in use for a process object. */
241 static int max_process_desc
;
243 /* The largest descriptor currently in use for keyboard input. */
244 static int max_keyboard_desc
;
246 /* Nonzero means delete a process right away if it exits. */
247 static int delete_exited_processes
;
249 /* Indexed by descriptor, gives the process (if any) for that descriptor */
250 Lisp_Object chan_process
[MAXDESC
];
252 /* Alist of elements (NAME . PROCESS) */
253 Lisp_Object Vprocess_alist
;
255 /* Buffered-ahead input char from process, indexed by channel.
256 -1 means empty (no char is buffered).
257 Used on sys V where the only way to tell if there is any
258 output from the process is to read at least one char.
259 Always -1 on systems that support FIONREAD. */
261 /* Don't make static; need to access externally. */
262 int proc_buffered_char
[MAXDESC
];
264 static Lisp_Object
get_process ();
266 /* Maximum number of bytes to send to a pty without an eof. */
267 static int pty_max_bytes
;
269 /* Open an available pty, returning a file descriptor.
270 Return -1 on failure.
271 The file name of the terminal corresponding to the pty
272 is left in the variable pty_name. */
274 static char pty_name
[24];
276 /* Compute the Lisp form of the process status, p->status, from
277 the numeric status that was returned by `wait'. */
279 Lisp_Object
status_convert ();
282 struct Lisp_Process
*p
;
284 union { int i
; WAITTYPE wt
; } u
;
285 u
.i
= XFASTINT (p
->raw_status_low
) + (XFASTINT (p
->raw_status_high
) << 16);
286 p
->status
= status_convert (u
.wt
);
287 p
->raw_status_low
= Qnil
;
288 p
->raw_status_high
= Qnil
;
291 /* Convert a process status word in Unix format to
292 the list that we use internally. */
299 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
300 else if (WIFEXITED (w
))
301 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
302 WCOREDUMP (w
) ? Qt
: Qnil
));
303 else if (WIFSIGNALED (w
))
304 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
305 WCOREDUMP (w
) ? Qt
: Qnil
));
310 /* Given a status-list, extract the three pieces of information
311 and store them individually through the three pointers. */
314 decode_status (l
, symbol
, code
, coredump
)
330 *symbol
= XCONS (l
)->car
;
331 tem
= XCONS (l
)->cdr
;
332 *code
= XFASTINT (XCONS (tem
)->car
);
333 tem
= XCONS (tem
)->cdr
;
334 *coredump
= !NILP (tem
);
338 /* Return a string describing a process status list. */
341 status_message (status
)
346 Lisp_Object string
, string2
;
348 decode_status (status
, &symbol
, &code
, &coredump
);
350 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
356 /* Cast to suppress warning if the table has const char *. */
357 signame
= (char *) sys_siglist
[code
];
359 signame
= sys_errlist
[code
];
364 string
= build_string (signame
);
365 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
366 XSTRING (string
)->data
[0] = DOWNCASE (XSTRING (string
)->data
[0]);
367 return concat2 (string
, string2
);
369 else if (EQ (symbol
, Qexit
))
372 return build_string ("finished\n");
373 string
= Fnumber_to_string (make_number (code
));
374 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
375 return concat2 (build_string ("exited abnormally with code "),
376 concat2 (string
, string2
));
379 return Fcopy_sequence (Fsymbol_name (symbol
));
391 /* Some systems name their pseudoterminals so that there are gaps in
392 the usual sequence - for example, on HP9000/S700 systems, there
393 are no pseudoterminals with names ending in 'f'. So we wait for
394 three failures in a row before deciding that we've reached the
396 int failed_count
= 0;
401 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
402 for (i
= 0; i
< 16; i
++)
405 #ifdef PTY_NAME_SPRINTF
408 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
409 #endif /* no PTY_NAME_SPRINTF */
413 #else /* no PTY_OPEN */
415 /* Unusual IRIS code */
416 *ptyv
= open ("/dev/ptc", O_RDWR
| O_NDELAY
, 0);
419 if (fstat (fd
, &stb
) < 0)
422 if (stat (pty_name
, &stb
) < 0)
425 if (failed_count
>= 3)
431 fd
= open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
433 fd
= open (pty_name
, O_RDWR
| O_NDELAY
, 0);
435 #endif /* not IRIS */
436 #endif /* no PTY_OPEN */
440 /* check to make certain that both sides are available
441 this avoids a nasty yet stupid bug in rlogins */
442 #ifdef PTY_TTY_NAME_SPRINTF
445 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
446 #endif /* no PTY_TTY_NAME_SPRINTF */
448 if (access (pty_name
, 6) != 0)
451 #if !defined(IRIS) && !defined(__sgi)
457 #endif /* not UNIPLUS */
464 #endif /* HAVE_PTYS */
470 register Lisp_Object val
, tem
, name1
;
471 register struct Lisp_Process
*p
;
475 /* size of process structure includes the vector header,
476 so deduct for that. But struct Lisp_Vector includes the first
477 element, thus deducts too much, so add it back. */
478 val
= Fmake_vector (make_number ((sizeof (struct Lisp_Process
)
479 - sizeof (struct Lisp_Vector
)
480 + sizeof (Lisp_Object
))
481 / sizeof (Lisp_Object
)),
483 XSETTYPE (val
, Lisp_Process
);
486 XSETINT (p
->infd
, -1);
487 XSETINT (p
->outfd
, -1);
488 XSETFASTINT (p
->pid
, 0);
489 XSETFASTINT (p
->tick
, 0);
490 XSETFASTINT (p
->update_tick
, 0);
491 p
->raw_status_low
= Qnil
;
492 p
->raw_status_high
= Qnil
;
494 p
->mark
= Fmake_marker ();
496 /* If name is already in use, modify it until it is unused. */
501 tem
= Fget_process (name1
);
502 if (NILP (tem
)) break;
503 sprintf (suffix
, "<%d>", i
);
504 name1
= concat2 (name
, build_string (suffix
));
508 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
512 remove_process (proc
)
513 register Lisp_Object proc
;
515 register Lisp_Object pair
;
517 pair
= Frassq (proc
, Vprocess_alist
);
518 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
519 Fset_marker (XPROCESS (proc
)->mark
, Qnil
, Qnil
);
521 deactivate_process (proc
);
524 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
525 "Return t if OBJECT is a process.")
529 return PROCESSP (obj
) ? Qt
: Qnil
;
532 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
533 "Return the process named NAME, or nil if there is none.")
535 register Lisp_Object name
;
539 CHECK_STRING (name
, 0);
540 return Fcdr (Fassoc (name
, Vprocess_alist
));
543 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
544 "Return the (or, a) process associated with BUFFER.\n\
545 BUFFER may be a buffer or the name of one.")
547 register Lisp_Object name
;
549 register Lisp_Object buf
, tail
, proc
;
551 if (NILP (name
)) return Qnil
;
552 buf
= Fget_buffer (name
);
553 if (NILP (buf
)) return Qnil
;
555 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
557 proc
= Fcdr (Fcar (tail
));
558 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
564 /* This is how commands for the user decode process arguments. It
565 accepts a process, a process name, a buffer, a buffer name, or nil.
566 Buffers denote the first process in the buffer, and nil denotes the
571 register Lisp_Object name
;
573 register Lisp_Object proc
, obj
;
576 obj
= Fget_process (name
);
578 obj
= Fget_buffer (name
);
580 error ("Process %s does not exist", XSTRING (name
)->data
);
582 else if (NILP (name
))
583 obj
= Fcurrent_buffer ();
587 /* Now obj should be either a buffer object or a process object.
591 proc
= Fget_buffer_process (obj
);
593 error ("Buffer %s has no process", XSTRING (XBUFFER (obj
)->name
)->data
);
597 CHECK_PROCESS (obj
, 0);
603 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
604 "Delete PROCESS: kill it and forget about it immediately.\n\
605 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
606 nil, indicating the current buffer's process.")
608 register Lisp_Object proc
;
610 proc
= get_process (proc
);
611 XPROCESS (proc
)->raw_status_low
= Qnil
;
612 XPROCESS (proc
)->raw_status_high
= Qnil
;
613 if (NETCONN_P (proc
))
615 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
616 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
618 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
620 Fkill_process (proc
, Qnil
);
621 /* Do this now, since remove_process will make sigchld_handler do nothing. */
622 XPROCESS (proc
)->status
623 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
624 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
627 remove_process (proc
);
631 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
632 "Return the status of PROCESS: a symbol, one of these:\n\
633 run -- for a process that is running.\n\
634 stop -- for a process stopped but continuable.\n\
635 exit -- for a process that has exited.\n\
636 signal -- for a process that has got a fatal signal.\n\
637 open -- for a network stream connection that is open.\n\
638 closed -- for a network stream connection that is closed.\n\
639 nil -- if arg is a process name and no such process exists.\n\
640 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
641 nil, indicating the current buffer's process.")
643 register Lisp_Object proc
;
645 register struct Lisp_Process
*p
;
646 register Lisp_Object status
;
649 proc
= Fget_process (proc
);
651 proc
= get_process (proc
);
657 if (!NILP (p
->raw_status_low
))
661 status
= XCONS (status
)->car
;
662 if (NETCONN_P (proc
))
664 if (EQ (status
, Qrun
))
666 else if (EQ (status
, Qexit
))
672 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
674 "Return the exit status of PROCESS or the signal number that killed it.\n\
675 If PROCESS has not yet exited or died, return 0.")
677 register Lisp_Object proc
;
679 CHECK_PROCESS (proc
, 0);
680 if (!NILP (XPROCESS (proc
)->raw_status_low
))
681 update_status (XPROCESS (proc
));
682 if (CONSP (XPROCESS (proc
)->status
))
683 return XCONS (XCONS (XPROCESS (proc
)->status
)->cdr
)->car
;
684 return make_number (0);
687 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
688 "Return the process id of PROCESS.\n\
689 This is the pid of the Unix process which PROCESS uses or talks to.\n\
690 For a network connection, this value is nil.")
692 register Lisp_Object proc
;
694 CHECK_PROCESS (proc
, 0);
695 return XPROCESS (proc
)->pid
;
698 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
699 "Return the name of PROCESS, as a string.\n\
700 This is the name of the program invoked in PROCESS,\n\
701 possibly modified to make it unique among process names.")
703 register Lisp_Object proc
;
705 CHECK_PROCESS (proc
, 0);
706 return XPROCESS (proc
)->name
;
709 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
710 "Return the command that was executed to start PROCESS.\n\
711 This is a list of strings, the first string being the program executed\n\
712 and the rest of the strings being the arguments given to it.\n\
713 For a non-child channel, this is nil.")
715 register Lisp_Object proc
;
717 CHECK_PROCESS (proc
, 0);
718 return XPROCESS (proc
)->command
;
721 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
722 "Return the name of the terminal PROCESS uses, or nil if none.\n\
723 This is the terminal that the process itself reads and writes on,\n\
724 not the name of the pty that Emacs uses to talk with that terminal.")
726 register Lisp_Object proc
;
728 CHECK_PROCESS (proc
, 0);
729 return XPROCESS (proc
)->tty_name
;
732 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
734 "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).")
736 register Lisp_Object proc
, buffer
;
738 CHECK_PROCESS (proc
, 0);
740 CHECK_BUFFER (buffer
, 1);
741 XPROCESS (proc
)->buffer
= buffer
;
745 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
747 "Return the buffer PROCESS is associated with.\n\
748 Output from PROCESS is inserted in this buffer\n\
749 unless PROCESS has a filter.")
751 register Lisp_Object proc
;
753 CHECK_PROCESS (proc
, 0);
754 return XPROCESS (proc
)->buffer
;
757 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
759 "Return the marker for the end of the last output from PROCESS.")
761 register Lisp_Object proc
;
763 CHECK_PROCESS (proc
, 0);
764 return XPROCESS (proc
)->mark
;
767 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
769 "Give PROCESS the filter function FILTER; nil means no filter.\n\
770 t means stop accepting output from the process.\n\
771 When a process has a filter, each time it does output\n\
772 the entire string of output is passed to the filter.\n\
773 The filter gets two arguments: the process and the string of output.\n\
774 If the process has a filter, its buffer is not used for output.")
776 register Lisp_Object proc
, filter
;
778 CHECK_PROCESS (proc
, 0);
781 FD_CLR (XINT (XPROCESS (proc
)->infd
), &input_wait_mask
);
782 FD_CLR (XINT (XPROCESS (proc
)->infd
), &non_keyboard_wait_mask
);
784 else if (EQ (XPROCESS (proc
)->filter
, Qt
))
786 FD_SET (XINT (XPROCESS (proc
)->infd
), &input_wait_mask
);
787 FD_SET (XINT (XPROCESS (proc
)->infd
), &non_keyboard_wait_mask
);
789 XPROCESS (proc
)->filter
= filter
;
793 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
795 "Returns the filter function of PROCESS; nil if none.\n\
796 See `set-process-filter' for more info on filter functions.")
798 register Lisp_Object proc
;
800 CHECK_PROCESS (proc
, 0);
801 return XPROCESS (proc
)->filter
;
804 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
806 "Give PROCESS the sentinel SENTINEL; nil for none.\n\
807 The sentinel is called as a function when the process changes state.\n\
808 It gets two arguments: the process, and a string describing the change.")
810 register Lisp_Object proc
, sentinel
;
812 CHECK_PROCESS (proc
, 0);
813 XPROCESS (proc
)->sentinel
= sentinel
;
817 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
819 "Return the sentinel of PROCESS; nil if none.\n\
820 See `set-process-sentinel' for more info on sentinels.")
822 register Lisp_Object proc
;
824 CHECK_PROCESS (proc
, 0);
825 return XPROCESS (proc
)->sentinel
;
828 DEFUN ("set-process-window-size", Fset_process_window_size
,
829 Sset_process_window_size
, 3, 3, 0,
830 "Tell PROCESS that it has logical window size HEIGHT and WIDTH.")
831 (proc
, height
, width
)
832 register Lisp_Object proc
, height
, width
;
834 CHECK_PROCESS (proc
, 0);
835 CHECK_NATNUM (height
, 0);
836 CHECK_NATNUM (width
, 0);
837 if (set_window_size (XINT (XPROCESS (proc
)->infd
),
838 XINT (height
), XINT(width
)) <= 0)
844 DEFUN ("process-kill-without-query", Fprocess_kill_without_query
,
845 Sprocess_kill_without_query
, 1, 2, 0,
846 "Say no query needed if PROCESS is running when Emacs is exited.\n\
847 Optional second argument if non-nil says to require a query.\n\
848 Value is t if a query was formerly required.")
850 register Lisp_Object proc
, value
;
854 CHECK_PROCESS (proc
, 0);
855 tem
= XPROCESS (proc
)->kill_without_query
;
856 XPROCESS (proc
)->kill_without_query
= Fnull (value
);
861 #if 0 /* Turned off because we don't currently record this info
862 in the process. Perhaps add it. */
863 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
864 "Return the connection type of `PROCESS'.\n\
865 The value is `nil' for a pipe,\n\
866 `t' or `pty' for a pty, or `stream' for a socket connection.")
870 return XPROCESS (process
)->type
;
877 register Lisp_Object tail
, tem
;
878 Lisp_Object proc
, minspace
, tem1
;
879 register struct buffer
*old
= current_buffer
;
880 register struct Lisp_Process
*p
;
884 XSETFASTINT (minspace
, 1);
886 set_buffer_internal (XBUFFER (Vstandard_output
));
887 Fbuffer_disable_undo (Vstandard_output
);
889 current_buffer
->truncate_lines
= Qt
;
892 Proc Status Buffer Tty Command\n\
893 ---- ------ ------ --- -------\n", -1);
895 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
899 proc
= Fcdr (Fcar (tail
));
901 if (NILP (p
->childp
))
904 Finsert (1, &p
->name
);
905 Findent_to (make_number (13), minspace
);
907 if (!NILP (p
->raw_status_low
))
910 if (CONSP (p
->status
))
911 symbol
= XCONS (p
->status
)->car
;
914 if (EQ (symbol
, Qsignal
))
917 tem
= Fcar (Fcdr (p
->status
));
919 if (XINT (tem
) < NSIG
)
920 write_string (sys_errlist
[XINT (tem
)], -1);
923 Fprinc (symbol
, Qnil
);
925 else if (NETCONN_P (proc
))
927 if (EQ (symbol
, Qrun
))
928 write_string ("open", -1);
929 else if (EQ (symbol
, Qexit
))
930 write_string ("closed", -1);
932 Fprinc (symbol
, Qnil
);
935 Fprinc (symbol
, Qnil
);
937 if (EQ (symbol
, Qexit
))
940 tem
= Fcar (Fcdr (p
->status
));
943 sprintf (tembuf
, " %d", XFASTINT (tem
));
944 write_string (tembuf
, -1);
948 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
949 remove_process (proc
);
951 Findent_to (make_number (22), minspace
);
952 if (NILP (p
->buffer
))
953 insert_string ("(none)");
954 else if (NILP (XBUFFER (p
->buffer
)->name
))
955 insert_string ("(Killed)");
957 Finsert (1, &XBUFFER (p
->buffer
)->name
);
959 Findent_to (make_number (37), minspace
);
961 if (STRINGP (p
->tty_name
))
962 Finsert (1, &p
->tty_name
);
964 insert_string ("(none)");
966 Findent_to (make_number (49), minspace
);
968 if (NETCONN_P (proc
))
970 sprintf (tembuf
, "(network stream connection to %s)\n",
971 XSTRING (p
->childp
)->data
);
972 insert_string (tembuf
);
986 insert_string ("\n");
992 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 0, "",
993 "Display a list of all processes.\n\
994 \(Any processes listed as Exited or Signaled are actually eliminated\n\
995 after the listing is made.)")
998 internal_with_output_to_temp_buffer ("*Process List*",
999 list_processes_1
, Qnil
);
1003 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1004 "Return a list of all processes.")
1007 return Fmapcar (Qcdr
, Vprocess_alist
);
1010 /* Starting asynchronous inferior processes. */
1012 static Lisp_Object
start_process_unwind ();
1014 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1015 "Start a program in a subprocess. Return the process object for it.\n\
1016 Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\
1017 NAME is name for process. It is modified if necessary to make it unique.\n\
1018 BUFFER is the buffer or (buffer-name) to associate with the process.\n\
1019 Process output goes at end of that buffer, unless you specify\n\
1020 an output stream or filter function to handle the output.\n\
1021 BUFFER may be also nil, meaning that this process is not associated\n\
1023 Third arg is program file name. It is searched for as in the shell.\n\
1024 Remaining arguments are strings to give program as arguments.")
1027 register Lisp_Object
*args
;
1029 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1031 register unsigned char *new_argv
;
1034 register unsigned char **new_argv
;
1037 int count
= specpdl_ptr
- specpdl
;
1041 buffer
= Fget_buffer_create (buffer
);
1043 /* Make sure that the child will be able to chdir to the current
1044 buffer's current directory, or its unhandled equivalent. We
1045 can't just have the child check for an error when it does the
1046 chdir, since it's in a vfork.
1048 We have to GCPRO around this because Fexpand_file_name and
1049 Funhandled_file_name_directory might call a file name handling
1050 function. The argument list is protected by the caller, so all
1051 we really have to worry about is buffer. */
1053 struct gcpro gcpro1
, gcpro2
;
1055 current_dir
= current_buffer
->directory
;
1057 GCPRO2 (buffer
, current_dir
);
1060 expand_and_dir_to_file
1061 (Funhandled_file_name_directory (current_dir
), Qnil
);
1062 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1063 report_file_error ("Setting current directory",
1064 Fcons (current_buffer
->directory
, Qnil
));
1070 CHECK_STRING (name
, 0);
1074 CHECK_STRING (program
, 2);
1077 /* Make a one member argv with all args concatenated
1078 together separated by a blank. */
1079 len
= XSTRING (program
)->size
+ 2;
1080 for (i
= 3; i
< nargs
; i
++)
1083 CHECK_STRING (tem
, i
);
1084 len
+= XSTRING (tem
)->size
+ 1; /* count the blank */
1086 new_argv
= (unsigned char *) alloca (len
);
1087 strcpy (new_argv
, XSTRING (program
)->data
);
1088 for (i
= 3; i
< nargs
; i
++)
1091 CHECK_STRING (tem
, i
);
1092 strcat (new_argv
, " ");
1093 strcat (new_argv
, XSTRING (tem
)->data
);
1095 /* Need to add code here to check for program existence on VMS */
1098 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1100 /* If program file name is not absolute, search our path for it */
1101 if (!IS_DIRECTORY_SEP (XSTRING (program
)->data
[0])
1102 && !(XSTRING (program
)->size
> 1
1103 && IS_DEVICE_SEP (XSTRING (program
)->data
[1])))
1105 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1108 GCPRO4 (name
, program
, buffer
, current_dir
);
1109 openp (Vexec_path
, program
, EXEC_SUFFIXES
, &tem
, 1);
1112 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1113 new_argv
[0] = XSTRING (tem
)->data
;
1116 new_argv
[0] = XSTRING (program
)->data
;
1118 for (i
= 3; i
< nargs
; i
++)
1121 CHECK_STRING (tem
, i
);
1122 new_argv
[i
- 2] = XSTRING (tem
)->data
;
1124 new_argv
[i
- 2] = 0;
1125 #endif /* not VMS */
1127 proc
= make_process (name
);
1128 /* If an error occurs and we can't start the process, we want to
1129 remove it from the process list. This means that each error
1130 check in create_process doesn't need to call remove_process
1131 itself; it's all taken care of here. */
1132 record_unwind_protect (start_process_unwind
, proc
);
1134 XPROCESS (proc
)->childp
= Qt
;
1135 XPROCESS (proc
)->command_channel_p
= Qnil
;
1136 XPROCESS (proc
)->buffer
= buffer
;
1137 XPROCESS (proc
)->sentinel
= Qnil
;
1138 XPROCESS (proc
)->filter
= Qnil
;
1139 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1141 create_process (proc
, new_argv
, current_dir
);
1143 return unbind_to (count
, proc
);
1146 /* This function is the unwind_protect form for Fstart_process. If
1147 PROC doesn't have its pid set, then we know someone has signalled
1148 an error and the process wasn't started successfully, so we should
1149 remove it from the process list. */
1151 start_process_unwind (proc
)
1154 if (!PROCESSP (proc
))
1157 /* Was PROC started successfully? */
1158 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1159 remove_process (proc
);
1166 create_process_1 (signo
)
1170 /* USG systems forget handlers when they are used;
1171 must reestablish each time */
1172 signal (signo
, create_process_1
);
1176 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1179 /* Mimic blocking of signals on system V, which doesn't really have it. */
1181 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1182 int sigchld_deferred
;
1185 create_process_sigchld ()
1187 signal (SIGCHLD
, create_process_sigchld
);
1189 sigchld_deferred
= 1;
1195 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1196 create_process (process
, new_argv
, current_dir
)
1197 Lisp_Object process
;
1199 Lisp_Object current_dir
;
1201 int pid
, inchannel
, outchannel
, forkin
, forkout
;
1204 SIGTYPE (*sigchld
)();
1207 extern char **environ
;
1209 inchannel
= outchannel
= -1;
1212 if (!NILP (Vprocess_connection_type
))
1213 outchannel
= inchannel
= allocate_pty ();
1218 /* On USG systems it does not work to open the pty's tty here
1219 and then close and reopen it in the child. */
1221 /* Don't let this terminal become our controlling terminal
1222 (in case we don't have one). */
1223 forkout
= forkin
= open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1225 forkout
= forkin
= open (pty_name
, O_RDWR
, 0);
1228 report_file_error ("Opening pty", Qnil
);
1230 forkin
= forkout
= -1;
1231 #endif /* not USG */
1235 #endif /* HAVE_PTYS */
1238 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1239 report_file_error ("Opening socketpair", Qnil
);
1240 outchannel
= inchannel
= sv
[0];
1241 forkout
= forkin
= sv
[1];
1243 #else /* not SKTPAIR */
1246 pipe_with_inherited_out (sv
);
1250 pipe_with_inherited_in (sv
);
1253 #else /* not WINDOWSNT */
1260 #endif /* not WINDOWSNT */
1262 #endif /* not SKTPAIR */
1265 /* Replaced by close_process_descs */
1266 set_exclusive_use (inchannel
);
1267 set_exclusive_use (outchannel
);
1270 /* Stride people say it's a mystery why this is needed
1271 as well as the O_NDELAY, but that it fails without this. */
1272 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1275 ioctl (inchannel
, FIONBIO
, &one
);
1280 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1283 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1287 /* Record this as an active process, with its channels.
1288 As a result, child_setup will close Emacs's side of the pipes. */
1289 chan_process
[inchannel
] = process
;
1290 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1291 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1292 /* Record the tty descriptor used in the subprocess. */
1294 XPROCESS (process
)->subtty
= Qnil
;
1296 XSETFASTINT (XPROCESS (process
)->subtty
, forkin
);
1297 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1298 XPROCESS (process
)->status
= Qrun
;
1300 /* Delay interrupts until we have a chance to store
1301 the new fork's pid in its process structure */
1305 #else /* not BSD4_1 */
1306 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1307 sigsetmask (sigmask (SIGCHLD
));
1308 #else /* ordinary USG */
1310 sigchld_deferred
= 0;
1311 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1313 #endif /* ordinary USG */
1314 #endif /* not BSD4_1 */
1315 #endif /* SIGCHLD */
1317 FD_SET (inchannel
, &input_wait_mask
);
1318 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1319 if (inchannel
> max_process_desc
)
1320 max_process_desc
= inchannel
;
1322 /* Until we store the proper pid, enable sigchld_handler
1323 to recognize an unknown pid as standing for this process.
1324 It is very important not to let this `marker' value stay
1325 in the table after this function has returned; if it does
1326 it might cause call-process to hang and subsequent asynchronous
1327 processes to get their return values scrambled. */
1328 XSETINT (XPROCESS (process
)->pid
, -1);
1331 /* child_setup must clobber environ on systems with true vfork.
1332 Protect it from permanent change. */
1333 char **save_environ
= environ
;
1338 #endif /* not WINDOWSNT */
1340 int xforkin
= forkin
;
1341 int xforkout
= forkout
;
1343 #if 0 /* This was probably a mistake--it duplicates code later on,
1344 but fails to handle all the cases. */
1345 /* Make sure SIGCHLD is not blocked in the child. */
1346 sigsetmask (SIGEMPTYMASK
);
1349 /* Make the pty be the controlling terminal of the process. */
1351 /* First, disconnect its current controlling terminal. */
1353 /* We tried doing setsid only if pty_flag, but it caused
1354 process_set_signal to fail on SGI when using a pipe. */
1356 /* Make the pty's terminal the controlling terminal. */
1360 /* We ignore the return value
1361 because faith@cs.unc.edu says that is necessary on Linux. */
1362 ioctl (xforkin
, TIOCSCTTY
, 0);
1365 #else /* not HAVE_SETSID */
1367 /* It's very important to call setpgrp here and no time
1368 afterwards. Otherwise, we lose our controlling tty which
1369 is set when we open the pty. */
1372 #endif /* not HAVE_SETSID */
1373 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1374 if (pty_flag
&& xforkin
>= 0)
1377 tcgetattr (xforkin
, &t
);
1379 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1380 write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1383 #if defined (NTTYDISC) && defined (TIOCSETD)
1384 if (pty_flag
&& xforkin
>= 0)
1386 /* Use new line discipline. */
1387 int ldisc
= NTTYDISC
;
1388 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1393 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1394 can do TIOCSPGRP only to the process's controlling tty. */
1397 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1398 I can't test it since I don't have 4.3. */
1399 int j
= open ("/dev/tty", O_RDWR
, 0);
1400 ioctl (j
, TIOCNOTTY
, 0);
1403 /* In order to get a controlling terminal on some versions
1404 of BSD, it is necessary to put the process in pgrp 0
1405 before it opens the terminal. */
1413 #endif /* TIOCNOTTY */
1415 #if !defined (RTU) && !defined (UNIPLUS)
1416 /*** There is a suggestion that this ought to be a
1417 conditional on TIOCSPGRP. */
1418 /* Now close the pty (if we had it open) and reopen it.
1419 This makes the pty the controlling terminal of the subprocess. */
1422 #ifdef SET_CHILD_PTY_PGRP
1423 int pgrp
= getpid ();
1426 /* I wonder if close (open (pty_name, ...)) would work? */
1429 xforkout
= xforkin
= open (pty_name
, O_RDWR
, 0);
1431 #ifdef SET_CHILD_PTY_PGRP
1432 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1433 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1439 #endif /* not UNIPLUS and not RTU */
1440 #ifdef SETUP_SLAVE_PTY
1445 #endif /* SETUP_SLAVE_PTY */
1447 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1448 Now reenable it in the child, so it will die when we want it to. */
1450 signal (SIGHUP
, SIG_DFL
);
1452 #endif /* HAVE_PTYS */
1457 #else /* not BSD4_1 */
1458 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1459 sigsetmask (SIGEMPTYMASK
);
1460 #else /* ordinary USG */
1462 signal (SIGCHLD
, sigchld
);
1464 #endif /* ordinary USG */
1465 #endif /* not BSD4_1 */
1466 #endif /* SIGCHLD */
1468 signal (SIGINT
, SIG_DFL
);
1469 signal (SIGQUIT
, SIG_DFL
);
1472 child_setup_tty (xforkout
);
1474 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1475 new_argv
, 1, current_dir
);
1476 #else /* not WINDOWSNT */
1477 child_setup (xforkin
, xforkout
, xforkout
,
1478 new_argv
, 1, current_dir
);
1479 #endif /* not WINDOWSNT */
1481 environ
= save_environ
;
1488 if (forkin
!= forkout
&& forkout
>= 0)
1490 report_file_error ("Doing vfork", Qnil
);
1493 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
1496 register_child (pid
, inchannel
);
1497 #endif /* WINDOWSNT */
1499 /* If the subfork execv fails, and it exits,
1500 this close hangs. I don't know why.
1501 So have an interrupt jar it loose. */
1503 signal (SIGALRM
, create_process_1
);
1505 XPROCESS (process
)->subtty
= Qnil
;
1510 if (forkin
!= forkout
&& forkout
>= 0)
1513 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1518 #else /* not BSD4_1 */
1519 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1520 sigsetmask (SIGEMPTYMASK
);
1521 #else /* ordinary USG */
1523 signal (SIGCHLD
, sigchld
);
1524 /* Now really handle any of these signals
1525 that came in during this function. */
1526 if (sigchld_deferred
)
1527 kill (getpid (), SIGCHLD
);
1529 #endif /* ordinary USG */
1530 #endif /* not BSD4_1 */
1531 #endif /* SIGCHLD */
1533 #endif /* not VMS */
1537 /* open a TCP network connection to a given HOST/SERVICE. Treated
1538 exactly like a normal process when reading and writing. Only
1539 differences are in status display and process deletion. A network
1540 connection has no PID; you cannot signal it. All you can do is
1541 deactivate and close it via delete-process */
1543 DEFUN ("open-network-stream", Fopen_network_stream
, Sopen_network_stream
,
1545 "Open a TCP connection for a service to a host.\n\
1546 Returns a subprocess-object to represent the connection.\n\
1547 Input and output work as for subprocesses; `delete-process' closes it.\n\
1548 Args are NAME BUFFER HOST SERVICE.\n\
1549 NAME is name for process. It is modified if necessary to make it unique.\n\
1550 BUFFER is the buffer (or buffer-name) to associate with the process.\n\
1551 Process output goes at end of that buffer, unless you specify\n\
1552 an output stream or filter function to handle the output.\n\
1553 BUFFER may be also nil, meaning that this process is not associated\n\
1555 Third arg is name of the host to connect to, or its IP address.\n\
1556 Fourth arg SERVICE is name of the service desired, or an integer\n\
1557 specifying a port number to connect to.")
1558 (name
, buffer
, host
, service
)
1559 Lisp_Object name
, buffer
, host
, service
;
1563 struct sockaddr_in address
;
1564 struct servent
*svc_info
;
1565 struct hostent
*host_info_ptr
, host_info
;
1566 char *(addr_list
[2]);
1567 IN_ADDR numeric_addr
;
1571 struct hostent host_info_fixed
;
1572 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1574 int count
= specpdl_ptr
- specpdl
;
1576 GCPRO4 (name
, buffer
, host
, service
);
1577 CHECK_STRING (name
, 0);
1578 CHECK_STRING (host
, 0);
1579 if (INTEGERP (service
))
1580 port
= htons ((unsigned short) XINT (service
));
1583 CHECK_STRING (service
, 0);
1584 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
1586 error ("Unknown service \"%s\"", XSTRING (service
)->data
);
1587 port
= svc_info
->s_port
;
1596 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
1598 if (! (host_info_ptr
== 0 && h_errno
== TRY_AGAIN
))
1601 Fsleep_for (make_number (1), Qnil
);
1603 if (host_info_ptr
== 0)
1604 /* Attempt to interpret host as numeric inet address */
1606 numeric_addr
= inet_addr ((char *) XSTRING (host
)->data
);
1607 if (NUMERIC_ADDR_ERROR
)
1608 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
1610 host_info_ptr
= &host_info
;
1611 host_info
.h_name
= 0;
1612 host_info
.h_aliases
= 0;
1613 host_info
.h_addrtype
= AF_INET
;
1615 /* Older machines have only one address slot called h_addr.
1616 Newer machines have h_addr_list, but #define h_addr to
1617 be its first element. */
1618 host_info
.h_addr_list
= &(addr_list
[0]);
1620 host_info
.h_addr
= (char*)(&numeric_addr
);
1622 host_info
.h_length
= strlen (addr_list
[0]);
1625 bzero (&address
, sizeof address
);
1626 bcopy (host_info_ptr
->h_addr
, (char *) &address
.sin_addr
,
1627 host_info_ptr
->h_length
);
1628 address
.sin_family
= host_info_ptr
->h_addrtype
;
1629 address
.sin_port
= port
;
1631 s
= socket (host_info_ptr
->h_addrtype
, SOCK_STREAM
, 0);
1633 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1635 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
1636 when connect is interrupted. So let's not let it get interrupted.
1637 Note we do not turn off polling, because polling is only used
1638 when not interrupt_input, and thus not normally used on the systems
1639 which have this bug. On systems which use polling, there's no way
1640 to quit if polling is turned off. */
1641 if (interrupt_input
)
1644 /* Slow down polling to every ten seconds.
1645 Some kernels have a bug which causes retrying connect to fail
1647 #ifdef POLL_FOR_INPUT
1648 bind_polling_period (10);
1652 if (connect (s
, (struct sockaddr
*) &address
, sizeof address
) == -1
1653 && errno
!= EISCONN
)
1659 if (errno
== EADDRINUSE
&& retry
< 20)
1667 if (interrupt_input
)
1671 report_file_error ("connection failed",
1672 Fcons (host
, Fcons (name
, Qnil
)));
1675 #ifdef POLL_FOR_INPUT
1676 unbind_to (count
, Qnil
);
1679 if (interrupt_input
)
1683 s
= connect_server (0);
1685 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1686 send_command (s
, C_PORT
, 0, "%s:%d", XSTRING (host
)->data
, ntohs (port
));
1687 send_command (s
, C_DUMB
, 1, 0);
1693 report_file_error ("error duplicating socket", Fcons (name
, Qnil
));
1696 buffer
= Fget_buffer_create (buffer
);
1697 proc
= make_process (name
);
1699 chan_process
[inch
] = proc
;
1702 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
1705 fcntl (inch
, F_SETFL
, O_NDELAY
);
1709 XPROCESS (proc
)->childp
= host
;
1710 XPROCESS (proc
)->command_channel_p
= Qnil
;
1711 XPROCESS (proc
)->buffer
= buffer
;
1712 XPROCESS (proc
)->sentinel
= Qnil
;
1713 XPROCESS (proc
)->filter
= Qnil
;
1714 XPROCESS (proc
)->command
= Qnil
;
1715 XPROCESS (proc
)->pid
= Qnil
;
1716 XSETINT (XPROCESS (proc
)->infd
, s
);
1717 XSETINT (XPROCESS (proc
)->outfd
, outch
);
1718 XPROCESS (proc
)->status
= Qrun
;
1719 FD_SET (inch
, &input_wait_mask
);
1720 FD_SET (inch
, &non_keyboard_wait_mask
);
1721 if (inch
> max_process_desc
)
1722 max_process_desc
= inch
;
1727 #endif /* HAVE_SOCKETS */
1729 deactivate_process (proc
)
1732 register int inchannel
, outchannel
;
1733 register struct Lisp_Process
*p
= XPROCESS (proc
);
1735 inchannel
= XINT (p
->infd
);
1736 outchannel
= XINT (p
->outfd
);
1740 /* Beware SIGCHLD hereabouts. */
1741 flush_pending_output (inchannel
);
1744 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
1745 sys$
dassgn (outchannel
);
1746 vs
= get_vms_process_pointer (p
->pid
);
1748 give_back_vms_process_stuff (vs
);
1752 if (outchannel
>= 0 && outchannel
!= inchannel
)
1756 XSETINT (p
->infd
, -1);
1757 XSETINT (p
->outfd
, -1);
1758 chan_process
[inchannel
] = Qnil
;
1759 FD_CLR (inchannel
, &input_wait_mask
);
1760 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
1761 if (inchannel
== max_process_desc
)
1764 /* We just closed the highest-numbered process input descriptor,
1765 so recompute the highest-numbered one now. */
1766 max_process_desc
= 0;
1767 for (i
= 0; i
< MAXDESC
; i
++)
1768 if (!NILP (chan_process
[i
]))
1769 max_process_desc
= i
;
1774 /* Close all descriptors currently in use for communication
1775 with subprocess. This is used in a newly-forked subprocess
1776 to get rid of irrelevant descriptors. */
1778 close_process_descs ()
1782 for (i
= 0; i
< MAXDESC
; i
++)
1784 Lisp_Object process
;
1785 process
= chan_process
[i
];
1786 if (!NILP (process
))
1788 int in
= XINT (XPROCESS (process
)->infd
);
1789 int out
= XINT (XPROCESS (process
)->outfd
);
1792 if (out
>= 0 && in
!= out
)
1799 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
1801 "Allow any pending output from subprocesses to be read by Emacs.\n\
1802 It is read into the process' buffers or given to their filter functions.\n\
1803 Non-nil arg PROCESS means do not return until some output has been received\n\
1805 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
1806 seconds and microseconds to wait; return after that much time whether\n\
1807 or not there is input.\n\
1808 Return non-nil iff we received any output before the timeout expired.")
1809 (proc
, timeout
, timeout_msecs
)
1810 register Lisp_Object proc
, timeout
, timeout_msecs
;
1815 if (! NILP (timeout_msecs
))
1817 CHECK_NUMBER (timeout_msecs
, 2);
1818 useconds
= XINT (timeout_msecs
);
1819 if (!INTEGERP (timeout
))
1820 XSETINT (timeout
, 0);
1823 int carry
= useconds
/ 1000000;
1825 XSETINT (timeout
, XINT (timeout
) + carry
);
1826 useconds
-= carry
* 1000000;
1828 /* I think this clause is necessary because C doesn't
1829 guarantee a particular rounding direction for negative
1833 XSETINT (timeout
, XINT (timeout
) - 1);
1834 useconds
+= 1000000;
1841 if (! NILP (timeout
))
1843 CHECK_NUMBER (timeout
, 1);
1844 seconds
= XINT (timeout
);
1857 XSETFASTINT (proc
, 0);
1860 (wait_reading_process_input (seconds
, useconds
, proc
, 0)
1864 /* This variable is different from waiting_for_input in keyboard.c.
1865 It is used to communicate to a lisp process-filter/sentinel (via the
1866 function Fwaiting_for_user_input_p below) whether emacs was waiting
1867 for user-input when that process-filter was called.
1868 waiting_for_input cannot be used as that is by definition 0 when
1869 lisp code is being evalled.
1870 This is also used in record_asynch_buffer_change.
1871 For that purpose, this must be 0
1872 when not inside wait_reading_process_input. */
1873 static int waiting_for_user_input_p
;
1875 /* Read and dispose of subprocess output while waiting for timeout to
1876 elapse and/or keyboard input to be available.
1879 timeout in seconds, or
1880 zero for no limit, or
1881 -1 means gobble data immediately available but don't wait for any.
1884 an additional duration to wait, measured in microseconds.
1885 If this is nonzero and time_limit is 0, then the timeout
1886 consists of MICROSECS only.
1888 READ_KBD is a lisp value:
1889 0 to ignore keyboard input, or
1890 1 to return when input is available, or
1891 -1 meaning caller will actually read the input, so don't throw to
1892 the quit handler, or
1893 a cons cell, meaning wait until its car is non-nil
1894 (and gobble terminal input into the buffer if any arrives), or
1895 a process object, meaning wait until something arrives from that
1896 process. The return value is true iff we read some input from
1899 DO_DISPLAY != 0 means redisplay should be done to show subprocess
1900 output that arrives.
1902 If READ_KBD is a pointer to a struct Lisp_Process, then the
1903 function returns true iff we received input from that process
1904 before the timeout elapsed.
1905 Otherwise, return true iff we received input from any process. */
1907 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
1908 int time_limit
, microsecs
;
1909 Lisp_Object read_kbd
;
1912 register int channel
, nfds
, m
;
1913 static SELECT_TYPE Available
;
1916 EMACS_TIME timeout
, end_time
, garbage
;
1918 int wait_channel
= -1;
1919 struct Lisp_Process
*wait_proc
= 0;
1920 int got_some_input
= 0;
1921 Lisp_Object
*wait_for_cell
= 0;
1923 FD_ZERO (&Available
);
1925 /* If read_kbd is a process to watch, set wait_proc and wait_channel
1927 if (PROCESSP (read_kbd
))
1929 wait_proc
= XPROCESS (read_kbd
);
1930 wait_channel
= XINT (wait_proc
->infd
);
1931 XSETFASTINT (read_kbd
, 0);
1934 /* If waiting for non-nil in a cell, record where. */
1935 if (CONSP (read_kbd
))
1937 wait_for_cell
= &XCONS (read_kbd
)->car
;
1938 XSETFASTINT (read_kbd
, 0);
1941 waiting_for_user_input_p
= XINT (read_kbd
);
1943 /* Since we may need to wait several times,
1944 compute the absolute time to return at. */
1945 if (time_limit
|| microsecs
)
1947 EMACS_GET_TIME (end_time
);
1948 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
1949 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
1952 /* It would not be safe to call this below,
1953 where we call redisplay_preserve_echo_area. */
1954 if (do_display
&& frame_garbaged
)
1955 prepare_menu_bars ();
1959 /* If calling from keyboard input, do not quit
1960 since we want to return C-g as an input character.
1961 Otherwise, do pending quit if requested. */
1962 if (XINT (read_kbd
) >= 0)
1965 /* Exit now if the cell we're waiting for became non-nil. */
1966 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
1969 /* Compute time from now till when time limit is up */
1970 /* Exit if already run out */
1971 if (time_limit
== -1)
1973 /* -1 specified for timeout means
1974 gobble output available now
1975 but don't wait at all. */
1977 EMACS_SET_SECS_USECS (timeout
, 0, 0);
1979 else if (time_limit
|| microsecs
)
1981 EMACS_GET_TIME (timeout
);
1982 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
1983 if (EMACS_TIME_NEG_P (timeout
))
1988 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
1991 /* Cause C-g and alarm signals to take immediate action,
1992 and cause input available signals to zero out timeout.
1994 It is important that we do this before checking for process
1995 activity. If we get a SIGCHLD after the explicit checks for
1996 process activity, timeout is the only way we will know. */
1997 if (XINT (read_kbd
) < 0)
1998 set_waiting_for_input (&timeout
);
2000 /* If status of something has changed, and no input is
2001 available, notify the user of the change right away. After
2002 this explicit check, we'll let the SIGCHLD handler zap
2003 timeout to get our attention. */
2004 if (update_tick
!= process_tick
&& do_display
)
2006 Atemp
= input_wait_mask
;
2007 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2008 if (select (MAXDESC
, &Atemp
, 0, 0, &timeout
) <= 0)
2010 /* It's okay for us to do this and then continue with
2011 the loop, since timeout has already been zeroed out. */
2012 clear_waiting_for_input ();
2017 /* Don't wait for output from a non-running process. */
2018 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
2019 update_status (wait_proc
);
2021 && ! EQ (wait_proc
->status
, Qrun
))
2023 clear_waiting_for_input ();
2027 /* Wait till there is something to do */
2029 if (! XINT (read_kbd
) && wait_for_cell
== 0)
2030 Available
= non_keyboard_wait_mask
;
2032 Available
= input_wait_mask
;
2034 /* If frame size has changed or the window is newly mapped,
2035 redisplay now, before we start to wait. There is a race
2036 condition here; if a SIGIO arrives between now and the select
2037 and indicates that a frame is trashed, the select may block
2038 displaying a trashed screen. */
2039 if (frame_garbaged
&& do_display
)
2040 redisplay_preserve_echo_area ();
2042 if (XINT (read_kbd
) && detect_input_pending ())
2045 FD_ZERO (&Available
);
2048 nfds
= select (MAXDESC
, &Available
, 0, 0, &timeout
);
2052 /* Make C-g and alarm signals set flags again */
2053 clear_waiting_for_input ();
2055 /* If we woke up due to SIGWINCH, actually change size now. */
2056 do_pending_window_change ();
2058 if (time_limit
&& nfds
== 0) /* timeout elapsed */
2062 if (xerrno
== EINTR
)
2063 FD_ZERO (&Available
);
2065 /* Ultrix select seems to return ENOMEM when it is
2066 interrupted. Treat it just like EINTR. Bleah. Note
2067 that we want to test for the "ultrix" CPP symbol, not
2068 "__ultrix__"; the latter is only defined under GCC, but
2069 not by DEC's bundled CC. -JimB */
2070 else if (xerrno
== ENOMEM
)
2071 FD_ZERO (&Available
);
2074 /* This happens for no known reason on ALLIANT.
2075 I am guessing that this is the right response. -- RMS. */
2076 else if (xerrno
== EFAULT
)
2077 FD_ZERO (&Available
);
2079 else if (xerrno
== EBADF
)
2082 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
2083 the child's closure of the pts gives the parent a SIGHUP, and
2084 the ptc file descriptor is automatically closed,
2085 yielding EBADF here or at select() call above.
2086 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
2087 in m/ibmrt-aix.h), and here we just ignore the select error.
2088 Cleanup occurs c/o status_notify after SIGCLD. */
2089 FD_ZERO (&Available
); /* Cannot depend on values returned */
2095 error("select error: %s", strerror (xerrno
));
2097 #if defined(sun) && !defined(USG5_4)
2098 else if (nfds
> 0 && keyboard_bit_set (&Available
)
2100 /* System sometimes fails to deliver SIGIO.
2102 David J. Mackenzie says that Emacs doesn't compile under
2103 Solaris if this code is enabled, thus the USG5_4 in the CPP
2104 conditional. "I haven't noticed any ill effects so far.
2105 If you find a Solaris expert somewhere, they might know
2107 kill (getpid (), SIGIO
);
2110 /* Check for keyboard input */
2111 /* If there is any, return immediately
2112 to give it higher priority than subprocesses */
2114 /* We used to do this if wait_for_cell,
2115 but that caused infinite recursion in selection request events. */
2116 if ((XINT (read_kbd
) || wait_for_cell
)
2117 && detect_input_pending ())
2120 if (detect_input_pending ())
2124 /* Exit now if the cell we're waiting for became non-nil. */
2125 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2129 /* If we think we have keyboard input waiting, but didn't get SIGIO
2130 go read it. This can happen with X on BSD after logging out.
2131 In that case, there really is no input and no SIGIO,
2132 but select says there is input. */
2134 if (XINT (read_kbd
) && interrupt_input
2135 && (keyboard_bit_set (&Available
)))
2140 got_some_input
|= nfds
> 0;
2142 /* If checking input just got us a size-change event from X,
2143 obey it now if we should. */
2144 if (XINT (read_kbd
) || wait_for_cell
)
2145 do_pending_window_change ();
2147 /* Check for data from a process. */
2148 /* Really FIRST_PROC_DESC should be 0 on Unix,
2149 but this is safer in the short run. */
2150 for (channel
= 0; channel
<= max_process_desc
; channel
++)
2152 if (FD_ISSET (channel
, &Available
)
2153 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
2157 /* If waiting for this channel, arrange to return as
2158 soon as no more input to be processed. No more
2160 if (wait_channel
== channel
)
2166 proc
= chan_process
[channel
];
2170 /* Read data from the process, starting with our
2171 buffered-ahead character if we have one. */
2173 nread
= read_process_output (proc
, channel
);
2176 /* Since read_process_output can run a filter,
2177 which can call accept-process-output,
2178 don't try to read from any other processes
2179 before doing the select again. */
2180 FD_ZERO (&Available
);
2183 redisplay_preserve_echo_area ();
2186 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2190 else if (nread
== -1 && errno
== EAGAIN
)
2194 else if (nread
== -1 && errno
== EAGAIN
)
2196 /* Note that we cannot distinguish between no input
2197 available now and a closed pipe.
2198 With luck, a closed pipe will be accompanied by
2199 subprocess termination and SIGCHLD. */
2200 else if (nread
== 0 && !NETCONN_P (proc
))
2202 #endif /* O_NDELAY */
2203 #endif /* O_NONBLOCK */
2204 #endif /* EWOULDBLOCK */
2206 /* On some OSs with ptys, when the process on one end of
2207 a pty exits, the other end gets an error reading with
2208 errno = EIO instead of getting an EOF (0 bytes read).
2209 Therefore, if we get an error reading and errno =
2210 EIO, just continue, because the child process has
2211 exited and should clean itself up soon (e.g. when we
2213 else if (nread
== -1 && errno
== EIO
)
2215 #endif /* HAVE_PTYS */
2216 /* If we can detect process termination, don't consider the process
2217 gone just because its pipe is closed. */
2219 else if (nread
== 0 && !NETCONN_P (proc
))
2224 /* Preserve status of processes already terminated. */
2225 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2226 deactivate_process (proc
);
2227 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2228 update_status (XPROCESS (proc
));
2229 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2230 XPROCESS (proc
)->status
2231 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2234 } /* end for each file descriptor */
2235 } /* end while exit conditions not met */
2237 waiting_for_user_input_p
= 0;
2239 /* If calling from keyboard input, do not quit
2240 since we want to return C-g as an input character.
2241 Otherwise, do pending quit if requested. */
2242 if (XINT (read_kbd
) >= 0)
2244 /* Prevent input_pending from remaining set if we quit. */
2245 clear_input_pending ();
2249 return got_some_input
;
2252 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
2255 read_process_output_call (fun_and_args
)
2256 Lisp_Object fun_and_args
;
2258 return apply1 (XCONS (fun_and_args
)->car
, XCONS (fun_and_args
)->cdr
);
2262 read_process_output_error_handler (error
)
2265 cmd_error_internal (error
, "error in process filter: ");
2267 update_echo_area ();
2268 Fsleep_for (make_number (2));
2271 /* Read pending output from the process channel,
2272 starting with our buffered-ahead character if we have one.
2273 Yield number of characters read.
2275 This function reads at most 1024 characters.
2276 If you want to read all available subprocess output,
2277 you must call it repeatedly until it returns zero. */
2279 read_process_output (proc
, channel
)
2281 register int channel
;
2283 register int nchars
;
2289 register Lisp_Object outstream
;
2290 register struct buffer
*old
= current_buffer
;
2291 register struct Lisp_Process
*p
= XPROCESS (proc
);
2292 register int opoint
;
2295 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2297 vs
= get_vms_process_pointer (p
->pid
);
2301 return(0); /* Really weird if it does this */
2302 if (!(vs
->iosb
[0] & 1))
2303 return -1; /* I/O error */
2306 error ("Could not get VMS process pointer");
2307 chars
= vs
->inputBuffer
;
2308 nchars
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2311 start_vms_process_read (vs
); /* Crank up the next read on the process */
2312 return 1; /* Nothing worth printing, say we got 1 */
2316 if (proc_buffered_char
[channel
] < 0)
2318 nchars
= read_child_output (channel
, chars
, sizeof (chars
));
2320 nchars
= read (channel
, chars
, sizeof chars
);
2324 chars
[0] = proc_buffered_char
[channel
];
2325 proc_buffered_char
[channel
] = -1;
2327 nchars
= read_child_output (channel
, chars
+ 1, sizeof (chars
) - 1);
2329 nchars
= read (channel
, chars
+ 1, sizeof chars
- 1);
2334 nchars
= nchars
+ 1;
2336 #endif /* not VMS */
2338 if (nchars
<= 0) return nchars
;
2340 outstream
= p
->filter
;
2341 if (!NILP (outstream
))
2343 /* We inhibit quit here instead of just catching it so that
2344 hitting ^G when a filter happens to be running won't screw
2346 int count
= specpdl_ptr
- specpdl
;
2347 Lisp_Object odeactivate
;
2348 Lisp_Object obuffer
;
2350 odeactivate
= Vdeactivate_mark
;
2351 obuffer
= Fcurrent_buffer ();
2353 specbind (Qinhibit_quit
, Qt
);
2354 specbind (Qlast_nonmenu_event
, Qt
);
2356 internal_condition_case_1 (read_process_output_call
,
2359 Fcons (make_string (chars
, nchars
),
2361 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
2362 read_process_output_error_handler
);
2364 /* Handling the process output should not deactivate the mark. */
2365 Vdeactivate_mark
= odeactivate
;
2367 if (! EQ (Fcurrent_buffer (), obuffer
))
2368 record_asynch_buffer_change ();
2370 if (waiting_for_user_input_p
)
2371 prepare_menu_bars ();
2374 start_vms_process_read (vs
);
2376 unbind_to (count
, Qnil
);
2380 /* If no filter, write into buffer if it isn't dead. */
2381 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2383 Lisp_Object old_read_only
;
2384 Lisp_Object old_begv
, old_zv
;
2385 Lisp_Object odeactivate
;
2387 odeactivate
= Vdeactivate_mark
;
2389 Fset_buffer (p
->buffer
);
2391 old_read_only
= current_buffer
->read_only
;
2392 XSETFASTINT (old_begv
, BEGV
);
2393 XSETFASTINT (old_zv
, ZV
);
2395 current_buffer
->read_only
= Qnil
;
2397 /* Insert new output into buffer
2398 at the current end-of-output marker,
2399 thus preserving logical ordering of input and output. */
2400 if (XMARKER (p
->mark
)->buffer
)
2401 SET_PT (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
));
2405 /* If the output marker is outside of the visible region, save
2406 the restriction and widen. */
2407 if (! (BEGV
<= point
&& point
<= ZV
))
2410 /* Make sure opoint floats ahead of any new text, just as point
2412 if (point
<= opoint
)
2415 /* Insert after old_begv, but before old_zv. */
2416 if (point
< XFASTINT (old_begv
))
2417 XSETFASTINT (old_begv
, XFASTINT (old_begv
) + nchars
);
2418 if (point
<= XFASTINT (old_zv
))
2419 XSETFASTINT (old_zv
, XFASTINT (old_zv
) + nchars
);
2421 /* Insert before markers in case we are inserting where
2422 the buffer's mark is, and the user's next command is Meta-y. */
2423 insert_before_markers (chars
, nchars
);
2424 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
2426 update_mode_lines
++;
2428 /* If the restriction isn't what it should be, set it. */
2429 if (XFASTINT (old_begv
) != BEGV
|| XFASTINT (old_zv
) != ZV
)
2430 Fnarrow_to_region (old_begv
, old_zv
);
2432 /* Handling the process output should not deactivate the mark. */
2433 Vdeactivate_mark
= odeactivate
;
2435 current_buffer
->read_only
= old_read_only
;
2437 set_buffer_internal (old
);
2440 start_vms_process_read (vs
);
2445 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
2447 "Returns non-nil if emacs is waiting for input from the user.\n\
2448 This is intended for use by asynchronous process output filters and sentinels.")
2451 return (waiting_for_user_input_p
? Qt
: Qnil
);
2454 /* Sending data to subprocess */
2456 jmp_buf send_process_frame
;
2459 send_process_trap ()
2465 longjmp (send_process_frame
, 1);
2468 /* Send some data to process PROC.
2469 BUF is the beginning of the data; LEN is the number of characters.
2470 OBJECT is the Lisp object that the data comes from. */
2472 send_process (proc
, buf
, len
, object
)
2478 /* Don't use register vars; longjmp can lose them. */
2480 unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
2483 struct Lisp_Process
*p
= XPROCESS (proc
);
2484 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2487 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2488 update_status (XPROCESS (proc
));
2489 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2490 error ("Process %s not running", procname
);
2493 vs
= get_vms_process_pointer (p
->pid
);
2495 error ("Could not find this process: %x", p
->pid
);
2496 else if (write_to_vms_process (vs
, buf
, len
))
2500 if (pty_max_bytes
== 0)
2502 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
2503 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
2505 if (pty_max_bytes
< 0)
2506 pty_max_bytes
= 250;
2508 pty_max_bytes
= 250;
2510 /* Deduct one, to leave space for the eof. */
2514 if (!setjmp (send_process_frame
))
2518 SIGTYPE (*old_sigpipe
)();
2521 /* Decide how much data we can send in one batch.
2522 Long lines need to be split into multiple batches. */
2523 if (!NILP (XPROCESS (proc
)->pty_flag
))
2525 /* Starting this at zero is always correct when not the first iteration
2526 because the previous iteration ended by sending C-d.
2527 It may not be correct for the first iteration
2528 if a partial line was sent in a separate send_process call.
2529 If that proves worth handling, we need to save linepos
2530 in the process object. */
2533 char *end
= buf
+ len
;
2535 /* Scan through this text for a line that is too long. */
2536 while (ptr
!= end
&& linepos
< pty_max_bytes
)
2544 /* If we found one, break the line there
2545 and put in a C-d to force the buffer through. */
2549 /* Send this batch, using one or more write calls. */
2552 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
2553 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
2554 signal (SIGPIPE
, old_sigpipe
);
2560 || errno
== EWOULDBLOCK
2566 /* Buffer is full. Wait, accepting input;
2567 that may allow the program
2568 to finish doing output and read more. */
2573 /* Running filters might relocate buffers or strings.
2574 Arrange to relocate BUF. */
2575 if (BUFFERP (object
))
2576 offset
= BUF_PTR_CHAR_POS (XBUFFER (object
),
2577 (unsigned char *) buf
);
2578 else if (STRINGP (object
))
2579 offset
= buf
- (char *) XSTRING (object
)->data
;
2581 XSETFASTINT (zero
, 0);
2582 wait_reading_process_input (1, 0, zero
, 0);
2584 if (BUFFERP (object
))
2585 buf
= (char *) BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
2586 else if (STRINGP (object
))
2587 buf
= offset
+ (char *) XSTRING (object
)->data
;
2592 /* This is a real error. */
2593 report_file_error ("writing to process", Fcons (proc
, Qnil
));
2600 /* If we sent just part of the string, put in an EOF
2601 to force it through, before we send the rest. */
2603 Fprocess_send_eof (proc
);
2608 XPROCESS (proc
)->raw_status_low
= Qnil
;
2609 XPROCESS (proc
)->raw_status_high
= Qnil
;
2610 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2611 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2612 deactivate_process (proc
);
2614 error ("Error writing to process %s; closed it", procname
);
2616 error ("SIGPIPE raised on process %s; closed it", procname
);
2621 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
2623 "Send current contents of region as input to PROCESS.\n\
2624 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2625 nil, indicating the current buffer's process.\n\
2626 Called from program, takes three arguments, PROCESS, START and END.\n\
2627 If the region is more than 500 characters long,\n\
2628 it is sent in several bunches. This may happen even for shorter regions.\n\
2629 Output from processes can arrive in between bunches.")
2630 (process
, start
, end
)
2631 Lisp_Object process
, start
, end
;
2636 proc
= get_process (process
);
2637 validate_region (&start
, &end
);
2639 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
2642 start1
= XINT (start
);
2643 send_process (proc
, &FETCH_CHAR (start1
), XINT (end
) - XINT (start
),
2644 Fcurrent_buffer ());
2649 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
2651 "Send PROCESS the contents of STRING as input.\n\
2652 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2653 nil, indicating the current buffer's process.\n\
2654 If STRING is more than 500 characters long,\n\
2655 it is sent in several bunches. This may happen even for shorter strings.\n\
2656 Output from processes can arrive in between bunches.")
2658 Lisp_Object process
, string
;
2661 CHECK_STRING (string
, 1);
2662 proc
= get_process (process
);
2663 send_process (proc
, XSTRING (string
)->data
, XSTRING (string
)->size
, string
);
2667 /* send a signal number SIGNO to PROCESS.
2668 CURRENT_GROUP means send to the process group that currently owns
2669 the terminal being used to communicate with PROCESS.
2670 This is used for various commands in shell mode.
2671 If NOMSG is zero, insert signal-announcements into process's buffers
2674 If we can, we try to signal PROCESS by sending control characters
2675 down the pty. This allows us to signal inferiors who have changed
2676 their uid, for which killpg would return an EPERM error. */
2679 process_send_signal (process
, signo
, current_group
, nomsg
)
2680 Lisp_Object process
;
2682 Lisp_Object current_group
;
2686 register struct Lisp_Process
*p
;
2690 proc
= get_process (process
);
2691 p
= XPROCESS (proc
);
2693 if (!EQ (p
->childp
, Qt
))
2694 error ("Process %s is not a subprocess",
2695 XSTRING (p
->name
)->data
);
2696 if (XINT (p
->infd
) < 0)
2697 error ("Process %s is not active",
2698 XSTRING (p
->name
)->data
);
2700 if (NILP (p
->pty_flag
))
2701 current_group
= Qnil
;
2703 /* If we are using pgrps, get a pgrp number and make it negative. */
2704 if (!NILP (current_group
))
2706 #ifdef SIGNALS_VIA_CHARACTERS
2707 /* If possible, send signals to the entire pgrp
2708 by sending an input character to it. */
2710 /* TERMIOS is the latest and bestest, and seems most likely to
2711 work. If the system has it, use it. */
2718 tcgetattr (XINT (p
->infd
), &t
);
2719 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2723 tcgetattr (XINT (p
->infd
), &t
);
2724 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2728 tcgetattr (XINT (p
->infd
), &t
);
2729 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
2730 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2732 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
2737 #else /* ! HAVE_TERMIOS */
2739 /* On Berkeley descendants, the following IOCTL's retrieve the
2740 current control characters. */
2741 #if defined (TIOCGLTC) && defined (TIOCGETC)
2749 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2750 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
2753 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2754 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
2758 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
2759 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
2761 #endif /* ! defined (SIGTSTP) */
2764 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2766 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
2773 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2774 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2777 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2778 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2782 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2783 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2785 #endif /* ! defined (SIGTSTP) */
2787 #else /* ! defined (TCGETA) */
2788 Your configuration files are messed up
.
2789 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
2790 you'd better be using one of the alternatives above! */
2791 #endif /* ! defined (TCGETA) */
2792 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2793 #endif /* ! defined HAVE_TERMIOS */
2794 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
2797 /* Get the pgrp using the tty itself, if we have that.
2798 Otherwise, use the pty to get the pgrp.
2799 On pfa systems, saka@pfu.fujitsu.co.JP writes:
2800 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
2801 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
2802 His patch indicates that if TIOCGPGRP returns an error, then
2803 we should just assume that p->pid is also the process group id. */
2807 if (!NILP (p
->subtty
))
2808 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
2810 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
2814 gid
= - XFASTINT (p
->pid
);
2815 #endif /* ! defined (pfa) */
2821 #else /* ! defined (TIOCGPGRP ) */
2822 /* Can't select pgrps on this system, so we know that
2823 the child itself heads the pgrp. */
2824 gid
= - XFASTINT (p
->pid
);
2825 #endif /* ! defined (TIOCGPGRP ) */
2828 gid
= - XFASTINT (p
->pid
);
2834 p
->raw_status_low
= Qnil
;
2835 p
->raw_status_high
= Qnil
;
2837 XSETINT (p
->tick
, ++process_tick
);
2841 #endif /* ! defined (SIGCONT) */
2844 send_process (proc
, "\003", 1, Qnil
); /* ^C */
2849 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
2854 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
2857 flush_pending_output (XINT (p
->infd
));
2861 /* If we don't have process groups, send the signal to the immediate
2862 subprocess. That isn't really right, but it's better than any
2863 obvious alternative. */
2866 kill (XFASTINT (p
->pid
), signo
);
2870 /* gid may be a pid, or minus a pgrp's number */
2872 if (!NILP (current_group
))
2873 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
2876 gid
= - XFASTINT (p
->pid
);
2879 #else /* ! defined (TIOCSIGSEND) */
2880 EMACS_KILLPG (-gid
, signo
);
2881 #endif /* ! defined (TIOCSIGSEND) */
2884 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
2885 "Interrupt process PROCESS. May be process or name of one.\n\
2886 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
2887 nil or no arg means current buffer's process.\n\
2888 Second arg CURRENT-GROUP non-nil means send signal to\n\
2889 the current process-group of the process's controlling terminal\n\
2890 rather than to the process's own process group.\n\
2891 If the process is a shell, this means interrupt current subjob\n\
2892 rather than the shell.")
2893 (process
, current_group
)
2894 Lisp_Object process
, current_group
;
2896 process_send_signal (process
, SIGINT
, current_group
, 0);
2900 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
2901 "Kill process PROCESS. May be process or name of one.\n\
2902 See function `interrupt-process' for more details on usage.")
2903 (process
, current_group
)
2904 Lisp_Object process
, current_group
;
2906 process_send_signal (process
, SIGKILL
, current_group
, 0);
2910 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
2911 "Send QUIT signal to process PROCESS. May be process or name of one.\n\
2912 See function `interrupt-process' for more details on usage.")
2913 (process
, current_group
)
2914 Lisp_Object process
, current_group
;
2916 process_send_signal (process
, SIGQUIT
, current_group
, 0);
2920 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
2921 "Stop process PROCESS. May be process or name of one.\n\
2922 See function `interrupt-process' for more details on usage.")
2923 (process
, current_group
)
2924 Lisp_Object process
, current_group
;
2927 error ("no SIGTSTP support");
2929 process_send_signal (process
, SIGTSTP
, current_group
, 0);
2934 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
2935 "Continue process PROCESS. May be process or name of one.\n\
2936 See function `interrupt-process' for more details on usage.")
2937 (process
, current_group
)
2938 Lisp_Object process
, current_group
;
2941 process_send_signal (process
, SIGCONT
, current_group
, 0);
2943 error ("no SIGCONT support");
2948 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
2949 2, 2, "nProcess number: \nnSignal code: ",
2950 "Send the process with number PID the signal with code CODE.\n\
2951 Both PID and CODE are integers.")
2953 Lisp_Object pid
, sig
;
2955 CHECK_NUMBER (pid
, 0);
2956 CHECK_NUMBER (sig
, 1);
2958 /* Only works for kill-type signals */
2959 return make_number (win32_kill_process (XINT (pid
), XINT (sig
)));
2961 return make_number (kill (XINT (pid
), XINT (sig
)));
2965 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
2966 "Make PROCESS see end-of-file in its input.\n\
2967 Eof comes after any text already sent to it.\n\
2968 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2969 nil, indicating the current buffer's process.\n\
2970 If PROCESS is a network connection, or is a process communicating\n\
2971 through a pipe (as opposed to a pty), then you cannot send any more\n\
2972 text to PROCESS after you call this function.")
2974 Lisp_Object process
;
2978 proc
= get_process (process
);
2980 /* Make sure the process is really alive. */
2981 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2982 update_status (XPROCESS (proc
));
2983 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2984 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
2987 send_process (proc
, "\032", 1, Qnil
); /* ^z */
2989 if (!NILP (XPROCESS (proc
)->pty_flag
))
2990 send_process (proc
, "\004", 1, Qnil
);
2993 close (XINT (XPROCESS (proc
)->outfd
));
2994 XSETINT (XPROCESS (proc
)->outfd
, open (NULL_DEVICE
, O_WRONLY
));
3000 /* Kill all processes associated with `buffer'.
3001 If `buffer' is nil, kill all processes */
3003 kill_buffer_processes (buffer
)
3006 Lisp_Object tail
, proc
;
3008 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3010 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3011 if (GC_PROCESSP (proc
)
3012 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
3014 if (NETCONN_P (proc
))
3015 Fdelete_process (proc
);
3016 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
3017 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
3022 /* On receipt of a signal that a child status has changed,
3023 loop asking about children with changed statuses until
3024 the system says there are no more.
3025 All we do is change the status;
3026 we do not run sentinels or print notifications.
3027 That is saved for the next time keyboard input is done,
3028 in order to avoid timing errors. */
3030 /** WARNING: this can be called during garbage collection.
3031 Therefore, it must not be fooled by the presence of mark bits in
3034 /** USG WARNING: Although it is not obvious from the documentation
3035 in signal(2), on a USG system the SIGCLD handler MUST NOT call
3036 signal() before executing at least one wait(), otherwise the handler
3037 will be called again, resulting in an infinite loop. The relevant
3038 portion of the documentation reads "SIGCLD signals will be queued
3039 and the signal-catching function will be continually reentered until
3040 the queue is empty". Invoking signal() causes the kernel to reexamine
3041 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
3044 sigchld_handler (signo
)
3047 int old_errno
= errno
;
3049 register struct Lisp_Process
*p
;
3050 extern EMACS_TIME
*input_available_clear_time
;
3054 sigheld
|= sigbit (SIGCHLD
);
3066 #endif /* no WUNTRACED */
3067 /* Keep trying to get a status until we get a definitive result. */
3071 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
3073 while (pid
<= 0 && errno
== EINTR
);
3077 /* A real failure. We have done all our job, so return. */
3079 /* USG systems forget handlers when they are used;
3080 must reestablish each time */
3082 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
3085 sigheld
&= ~sigbit (SIGCHLD
);
3093 #endif /* no WNOHANG */
3095 /* Find the process that signaled us, and record its status. */
3098 for (tail
= Vprocess_alist
; XSYMBOL (tail
) != XSYMBOL (Qnil
); tail
= XCONS (tail
)->cdr
)
3100 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3101 p
= XPROCESS (proc
);
3102 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
3107 /* Look for an asynchronous process whose pid hasn't been filled
3110 for (tail
= Vprocess_alist
; XSYMBOL (tail
) != XSYMBOL (Qnil
); tail
= XCONS (tail
)->cdr
)
3112 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3113 p
= XPROCESS (proc
);
3114 if (INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
3119 /* Change the status of the process that was found. */
3122 union { int i
; WAITTYPE wt
; } u
;
3123 int clear_desc_flag
= 0;
3125 XSETINT (p
->tick
, ++process_tick
);
3127 XSETFASTINT (p
->raw_status_low
, u
.i
& 0xffff);
3128 XSETFASTINT (p
->raw_status_high
, u
.i
>> 16);
3130 /* If process has terminated, stop waiting for its output. */
3131 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
3132 && XINT (p
->infd
) >= 0)
3133 clear_desc_flag
= 1;
3135 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
3136 if (clear_desc_flag
)
3138 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
3139 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
3142 /* Tell wait_reading_process_input that it needs to wake up and
3144 if (input_available_clear_time
)
3145 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3148 /* There was no asynchronous process found for that id. Check
3149 if we have a synchronous process. */
3152 synch_process_alive
= 0;
3154 /* Report the status of the synchronous process. */
3156 synch_process_retcode
= WRETCODE (w
);
3157 else if (WIFSIGNALED (w
))
3159 int code
= WTERMSIG (w
);
3165 /* Suppress warning if the table has const char *. */
3166 signame
= (char *) sys_siglist
[code
];
3168 signame
= sys_errlist
[code
];
3172 signame
= "unknown";
3174 synch_process_death
= signame
;
3177 /* Tell wait_reading_process_input that it needs to wake up and
3179 if (input_available_clear_time
)
3180 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3183 /* On some systems, we must return right away.
3184 If any more processes want to signal us, we will
3186 Otherwise (on systems that have WNOHANG), loop around
3187 to use up all the processes that have something to tell us. */
3188 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT)
3190 signal (signo
, sigchld_handler
);
3194 #endif /* USG, but not HPUX with WNOHANG */
3200 exec_sentinel_unwind (data
)
3203 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
3208 exec_sentinel_error_handler (error
)
3211 cmd_error_internal (error
, "error in process sentinel: ");
3213 update_echo_area ();
3214 Fsleep_for (make_number (2));
3218 exec_sentinel (proc
, reason
)
3219 Lisp_Object proc
, reason
;
3221 Lisp_Object sentinel
, obuffer
, odeactivate
;
3222 register struct Lisp_Process
*p
= XPROCESS (proc
);
3223 int count
= specpdl_ptr
- specpdl
;
3225 odeactivate
= Vdeactivate_mark
;
3226 obuffer
= Fcurrent_buffer ();
3227 sentinel
= p
->sentinel
;
3228 if (NILP (sentinel
))
3231 /* Zilch the sentinel while it's running, to avoid recursive invocations;
3232 assure that it gets restored no matter how the sentinel exits. */
3234 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
3235 /* Inhibit quit so that random quits don't screw up a running filter. */
3236 specbind (Qinhibit_quit
, Qt
);
3237 specbind (Qlast_nonmenu_event
, Qt
);
3239 internal_condition_case_1 (read_process_output_call
,
3241 Fcons (proc
, Fcons (reason
, Qnil
))),
3242 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
3243 exec_sentinel_error_handler
);
3245 Vdeactivate_mark
= odeactivate
;
3246 if (! EQ (Fcurrent_buffer (), obuffer
))
3247 record_asynch_buffer_change ();
3249 if (waiting_for_user_input_p
)
3250 prepare_menu_bars ();
3251 unbind_to (count
, Qnil
);
3254 /* Report all recent events of a change in process status
3255 (either run the sentinel or output a message).
3256 This is done while Emacs is waiting for keyboard input. */
3260 register Lisp_Object proc
, buffer
;
3261 Lisp_Object tail
, msg
;
3262 struct gcpro gcpro1
, gcpro2
;
3266 /* We need to gcpro tail; if read_process_output calls a filter
3267 which deletes a process and removes the cons to which tail points
3268 from Vprocess_alist, and then causes a GC, tail is an unprotected
3272 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
3275 register struct Lisp_Process
*p
;
3277 proc
= Fcdr (Fcar (tail
));
3278 p
= XPROCESS (proc
);
3280 if (XINT (p
->tick
) != XINT (p
->update_tick
))
3282 XSETINT (p
->update_tick
, XINT (p
->tick
));
3284 /* If process is still active, read any output that remains. */
3285 if (XINT (p
->infd
) >= 0)
3286 while (! EQ (p
->filter
, Qt
)
3287 && read_process_output (proc
, XINT (p
->infd
)) > 0);
3291 /* Get the text to use for the message. */
3292 if (!NILP (p
->raw_status_low
))
3294 msg
= status_message (p
->status
);
3296 /* If process is terminated, deactivate it or delete it. */
3298 if (CONSP (p
->status
))
3299 symbol
= XCONS (p
->status
)->car
;
3301 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
3302 || EQ (symbol
, Qclosed
))
3304 if (delete_exited_processes
)
3305 remove_process (proc
);
3307 deactivate_process (proc
);
3310 /* Now output the message suitably. */
3311 if (!NILP (p
->sentinel
))
3312 exec_sentinel (proc
, msg
);
3313 /* Don't bother with a message in the buffer
3314 when a process becomes runnable. */
3315 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
3317 Lisp_Object ro
, tem
;
3318 struct buffer
*old
= current_buffer
;
3321 ro
= XBUFFER (buffer
)->read_only
;
3323 /* Avoid error if buffer is deleted
3324 (probably that's why the process is dead, too) */
3325 if (NILP (XBUFFER (buffer
)->name
))
3327 Fset_buffer (buffer
);
3329 /* Insert new output into buffer
3330 at the current end-of-output marker,
3331 thus preserving logical ordering of input and output. */
3332 if (XMARKER (p
->mark
)->buffer
)
3333 SET_PT (marker_position (p
->mark
));
3336 if (point
<= opoint
)
3337 opoint
+= XSTRING (msg
)->size
+ XSTRING (p
->name
)->size
+ 10;
3339 tem
= current_buffer
->read_only
;
3340 current_buffer
->read_only
= Qnil
;
3341 insert_string ("\nProcess ");
3342 Finsert (1, &p
->name
);
3343 insert_string (" ");
3345 current_buffer
->read_only
= tem
;
3346 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
3349 set_buffer_internal (old
);
3354 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
3355 redisplay_preserve_echo_area ();
3357 update_tick
= process_tick
;
3362 /* The first time this is called, assume keyboard input comes from DESC
3363 instead of from where we used to expect it.
3364 Subsequent calls mean assume input keyboard can come from DESC
3365 in addition to other places. */
3367 static int add_keyboard_wait_descriptor_called_flag
;
3370 add_keyboard_wait_descriptor (desc
)
3373 if (! add_keyboard_wait_descriptor_called_flag
)
3374 FD_CLR (0, &input_wait_mask
);
3375 add_keyboard_wait_descriptor_called_flag
= 1;
3376 FD_SET (desc
, &input_wait_mask
);
3377 if (desc
> max_keyboard_desc
)
3378 max_keyboard_desc
= desc
;
3381 /* From now on, do not expect DESC to give keyboard input. */
3384 delete_keyboard_wait_descriptor (desc
)
3388 int lim
= max_keyboard_desc
;
3390 FD_CLR (desc
, &input_wait_mask
);
3392 if (desc
== max_keyboard_desc
)
3393 for (fd
= 0; fd
< lim
; fd
++)
3394 if (FD_ISSET (fd
, &input_wait_mask
)
3395 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3396 max_keyboard_desc
= fd
;
3399 /* Return nonzero if *MASK has a bit set
3400 that corresponds to one of the keyboard input descriptors. */
3403 keyboard_bit_set (mask
)
3408 for (fd
= 0; fd
< max_keyboard_desc
; fd
++)
3409 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
3410 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3422 if (! noninteractive
|| initialized
)
3424 signal (SIGCHLD
, sigchld_handler
);
3427 FD_ZERO (&input_wait_mask
);
3428 FD_ZERO (&non_keyboard_wait_mask
);
3429 max_process_desc
= 0;
3431 FD_SET (0, &input_wait_mask
);
3433 Vprocess_alist
= Qnil
;
3434 for (i
= 0; i
< MAXDESC
; i
++)
3436 chan_process
[i
] = Qnil
;
3437 proc_buffered_char
[i
] = -1;
3444 stream_process
= intern ("stream");
3446 Qprocessp
= intern ("processp");
3447 staticpro (&Qprocessp
);
3448 Qrun
= intern ("run");
3450 Qstop
= intern ("stop");
3452 Qsignal
= intern ("signal");
3453 staticpro (&Qsignal
);
3455 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
3458 Qexit = intern ("exit");
3459 staticpro (&Qexit); */
3461 Qopen
= intern ("open");
3463 Qclosed
= intern ("closed");
3464 staticpro (&Qclosed
);
3466 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
3467 staticpro (&Qlast_nonmenu_event
);
3469 staticpro (&Vprocess_alist
);
3471 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
3472 "*Non-nil means delete processes immediately when they exit.\n\
3473 nil means don't delete them until `list-processes' is run.");
3475 delete_exited_processes
= 1;
3477 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
3478 "Control type of device used to communicate with subprocesses.\n\
3479 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
3480 The value has no effect if the system has no ptys or if all ptys are busy:\n\
3481 then a pipe is used in any case.\n\
3482 The value takes effect when `start-process' is called.");
3483 Vprocess_connection_type
= Qt
;
3485 defsubr (&Sprocessp
);
3486 defsubr (&Sget_process
);
3487 defsubr (&Sget_buffer_process
);
3488 defsubr (&Sdelete_process
);
3489 defsubr (&Sprocess_status
);
3490 defsubr (&Sprocess_exit_status
);
3491 defsubr (&Sprocess_id
);
3492 defsubr (&Sprocess_name
);
3493 defsubr (&Sprocess_tty_name
);
3494 defsubr (&Sprocess_command
);
3495 defsubr (&Sset_process_buffer
);
3496 defsubr (&Sprocess_buffer
);
3497 defsubr (&Sprocess_mark
);
3498 defsubr (&Sset_process_filter
);
3499 defsubr (&Sprocess_filter
);
3500 defsubr (&Sset_process_sentinel
);
3501 defsubr (&Sset_process_window_size
);
3502 defsubr (&Sprocess_sentinel
);
3503 defsubr (&Sprocess_kill_without_query
);
3504 defsubr (&Slist_processes
);
3505 defsubr (&Sprocess_list
);
3506 defsubr (&Sstart_process
);
3508 defsubr (&Sopen_network_stream
);
3509 #endif /* HAVE_SOCKETS */
3510 defsubr (&Saccept_process_output
);
3511 defsubr (&Sprocess_send_region
);
3512 defsubr (&Sprocess_send_string
);
3513 defsubr (&Sinterrupt_process
);
3514 defsubr (&Skill_process
);
3515 defsubr (&Squit_process
);
3516 defsubr (&Sstop_process
);
3517 defsubr (&Scontinue_process
);
3518 defsubr (&Sprocess_send_eof
);
3519 defsubr (&Ssignal_process
);
3520 defsubr (&Swaiting_for_user_input_p
);
3521 /* defsubr (&Sprocess_connection); */
3525 #else /* not subprocesses */
3527 #include <sys/types.h>
3531 #include "systime.h"
3532 #include "termopts.h"
3534 extern int frame_garbaged
;
3537 /* As described above, except assuming that there are no subprocesses:
3539 Wait for timeout to elapse and/or keyboard input to be available.
3542 timeout in seconds, or
3543 zero for no limit, or
3544 -1 means gobble data immediately available but don't wait for any.
3546 read_kbd is a Lisp_Object:
3547 0 to ignore keyboard input, or
3548 1 to return when input is available, or
3549 -1 means caller will actually read the input, so don't throw to
3551 We know that read_kbd will never be a Lisp_Process, since
3552 `subprocesses' isn't defined.
3554 do_display != 0 means redisplay should be done to show subprocess
3555 output that arrives.
3557 Return true iff we received input from any process. */
3560 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
3561 int time_limit
, microsecs
;
3562 Lisp_Object read_kbd
;
3565 EMACS_TIME end_time
, timeout
, *timeout_p
;
3568 /* What does time_limit really mean? */
3569 if (time_limit
|| microsecs
)
3571 /* It's not infinite. */
3572 timeout_p
= &timeout
;
3574 if (time_limit
== -1)
3575 /* In fact, it's zero. */
3576 EMACS_SET_SECS_USECS (timeout
, 0, 0);
3578 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
3580 /* How far in the future is that? */
3581 EMACS_GET_TIME (end_time
);
3582 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
3585 /* It's infinite. */
3588 /* This must come before stop_polling. */
3589 prepare_menu_bars ();
3591 /* Turn off periodic alarms (in case they are in use)
3592 because the select emulator uses alarms. */
3599 waitchannels
= XINT (read_kbd
) ? 1 : 0;
3601 /* If calling from keyboard input, do not quit
3602 since we want to return C-g as an input character.
3603 Otherwise, do pending quit if requested. */
3604 if (XINT (read_kbd
) >= 0)
3609 EMACS_GET_TIME (*timeout_p
);
3610 EMACS_SUB_TIME (*timeout_p
, end_time
, *timeout_p
);
3611 if (EMACS_TIME_NEG_P (*timeout_p
))
3615 /* Cause C-g and alarm signals to take immediate action,
3616 and cause input available signals to zero out timeout. */
3617 if (XINT (read_kbd
) < 0)
3618 set_waiting_for_input (&timeout
);
3620 /* If a frame has been newly mapped and needs updating,
3621 reprocess its display stuff. */
3622 if (frame_garbaged
&& do_display
)
3623 redisplay_preserve_echo_area ();
3625 if (XINT (read_kbd
) && detect_input_pending ())
3628 nfds
= select (1, &waitchannels
, 0, 0, timeout_p
);
3630 /* Make C-g and alarm signals set flags again */
3631 clear_waiting_for_input ();
3633 /* If we woke up due to SIGWINCH, actually change size now. */
3634 do_pending_window_change ();
3638 /* If the system call was interrupted, then go around the
3644 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
3645 /* System sometimes fails to deliver SIGIO. */
3646 kill (getpid (), SIGIO
);
3649 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
3653 /* If we have timed out (nfds == 0) or found some input (nfds > 0),
3665 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
3666 /* Don't confuse make-docfile by having two doc strings for this function.
3667 make-docfile does not pay attention to #if, for good reason! */
3670 register Lisp_Object name
;
3675 /* Kill all processes associated with `buffer'.
3676 If `buffer' is nil, kill all processes.
3677 Since we have no subprocesses, this does nothing. */
3679 kill_buffer_processes (buffer
)
3690 defsubr (&Sget_buffer_process
);
3694 #endif /* not subprocesses */