1 /* Asynchronous subprocess control for GNU Emacs.
2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
6 GNU Emacs is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU Emacs is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU Emacs; see the file COPYING. If not, write to
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
25 /* This file is split into two parts by the following preprocessor
26 conditional. The 'then' clause contains all of the support for
27 asynchronous subprocesses. The 'else' clause contains stub
28 versions of some of the asynchronous subprocess routines that are
29 often called elsewhere in Emacs, so we don't have to #ifdef the
30 sections that call them. */
38 #include <sys/types.h> /* some typedefs are used in sys/file.h */
48 #endif /* not WINDOWSNT */
50 #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */
51 #include <sys/socket.h>
53 #include <netinet/in.h>
54 #include <arpa/inet.h>
55 #ifdef NEED_NET_ERRNO_H
56 #include <net/errno.h>
57 #endif /* NEED_NET_ERRNO_H */
58 #endif /* HAVE_SOCKETS */
60 /* TERM is a poor-man's SLIP, used on Linux. */
65 /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */
66 #ifdef HAVE_BROKEN_INET_ADDR
67 #define IN_ADDR struct in_addr
68 #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1)
70 #define IN_ADDR unsigned long
71 #define NUMERIC_ADDR_ERROR (numeric_addr == -1)
74 #if defined(BSD) || defined(STRIDE)
75 #include <sys/ioctl.h>
76 #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5)
78 #endif /* HAVE_PTYS and no O_NDELAY */
79 #endif /* BSD or STRIDE */
81 #ifdef BROKEN_O_NONBLOCK
83 #endif /* BROKEN_O_NONBLOCK */
90 #include <sys/sysmacros.h> /* for "minor" */
100 #include "termhooks.h"
101 #include "termopts.h"
102 #include "commands.h"
105 Lisp_Object Qprocessp
;
106 Lisp_Object Qrun
, Qstop
, Qsignal
, Qopen
, Qclosed
;
107 Lisp_Object Qlast_nonmenu_event
;
108 /* Qexit is declared and initialized in eval.c. */
110 /* a process object is a network connection when its childp field is neither
111 Qt nor Qnil but is instead a string (name of foreign host we
112 are connected to + name of port we are connected to) */
115 static Lisp_Object stream_process
;
117 #define NETCONN_P(p) (GC_STRINGP (XPROCESS (p)->childp))
119 #define NETCONN_P(p) 0
120 #endif /* HAVE_SOCKETS */
122 /* Define first descriptor number available for subprocesses. */
124 #define FIRST_PROC_DESC 1
126 #define FIRST_PROC_DESC 3
129 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
132 #if !defined (SIGCHLD) && defined (SIGCLD)
133 #define SIGCHLD SIGCLD
136 #include "syssignal.h"
141 extern char *strerror ();
143 extern char *sys_errlist
[];
150 #ifndef SYS_SIGLIST_DECLARED
155 extern char *sys_siglist
[];
156 #endif /* not LINUX */
158 char *sys_siglist
[] =
164 "illegal instruction",
168 "floating point exception",
171 "segmentation violation",
172 "bad argument to system call",
173 "write on a pipe with no one to read it",
175 "software termination signal from kill",
177 "sendable stop signal not from tty",
178 "stop signal from tty",
179 "continue a stopped process",
180 "child status has changed",
181 "background read attempted from control tty",
182 "background write attempted from control tty",
183 "input record available at control tty",
184 "exceeded CPU time limit",
185 "exceeded file size limit"
187 #endif /* not WINDOWSNT */
190 #endif /* ! SYS_SIGLIST_DECLARED */
192 /* t means use pty, nil means use a pipe,
193 maybe other values to come. */
194 static Lisp_Object Vprocess_connection_type
;
198 #include <sys/socket.h>
202 /* These next two vars are non-static since sysdep.c uses them in the
203 emulation of `select'. */
204 /* Number of events of change of status of a process. */
206 /* Number of events for which the user or sentinel has been notified. */
209 #include "sysselect.h"
211 /* If we support a window system, turn on the code to poll periodically
212 to detect C-g. It isn't actually used when doing interrupt input. */
213 #ifdef HAVE_WINDOW_SYSTEM
214 #define POLL_FOR_INPUT
217 /* Mask of bits indicating the descriptors that we wait for input on. */
219 static SELECT_TYPE input_wait_mask
;
221 /* Mask that excludes keyboard input descriptor (s). */
223 static SELECT_TYPE non_keyboard_wait_mask
;
225 /* The largest descriptor currently in use for a process object. */
226 static int max_process_desc
;
228 /* The largest descriptor currently in use for keyboard input. */
229 static int max_keyboard_desc
;
231 /* Nonzero means delete a process right away if it exits. */
232 static int delete_exited_processes
;
234 /* Indexed by descriptor, gives the process (if any) for that descriptor */
235 Lisp_Object chan_process
[MAXDESC
];
237 /* Alist of elements (NAME . PROCESS) */
238 Lisp_Object Vprocess_alist
;
240 /* Buffered-ahead input char from process, indexed by channel.
241 -1 means empty (no char is buffered).
242 Used on sys V where the only way to tell if there is any
243 output from the process is to read at least one char.
244 Always -1 on systems that support FIONREAD. */
246 /* Don't make static; need to access externally. */
247 int proc_buffered_char
[MAXDESC
];
249 static Lisp_Object
get_process ();
251 /* Maximum number of bytes to send to a pty without an eof. */
252 static int pty_max_bytes
;
255 /* The file name of the pty opened by allocate_pty. */
257 static char pty_name
[24];
260 /* Compute the Lisp form of the process status, p->status, from
261 the numeric status that was returned by `wait'. */
263 Lisp_Object
status_convert ();
266 struct Lisp_Process
*p
;
268 union { int i
; WAITTYPE wt
; } u
;
269 u
.i
= XFASTINT (p
->raw_status_low
) + (XFASTINT (p
->raw_status_high
) << 16);
270 p
->status
= status_convert (u
.wt
);
271 p
->raw_status_low
= Qnil
;
272 p
->raw_status_high
= Qnil
;
275 /* Convert a process status word in Unix format to
276 the list that we use internally. */
283 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
284 else if (WIFEXITED (w
))
285 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
286 WCOREDUMP (w
) ? Qt
: Qnil
));
287 else if (WIFSIGNALED (w
))
288 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
289 WCOREDUMP (w
) ? Qt
: Qnil
));
294 /* Given a status-list, extract the three pieces of information
295 and store them individually through the three pointers. */
298 decode_status (l
, symbol
, code
, coredump
)
314 *symbol
= XCONS (l
)->car
;
315 tem
= XCONS (l
)->cdr
;
316 *code
= XFASTINT (XCONS (tem
)->car
);
317 tem
= XCONS (tem
)->cdr
;
318 *coredump
= !NILP (tem
);
322 /* Return a string describing a process status list. */
325 status_message (status
)
330 Lisp_Object string
, string2
;
332 decode_status (status
, &symbol
, &code
, &coredump
);
334 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
340 /* Cast to suppress warning if the table has const char *. */
341 signame
= (char *) sys_siglist
[code
];
343 signame
= sys_errlist
[code
];
348 string
= build_string (signame
);
349 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
350 XSTRING (string
)->data
[0] = DOWNCASE (XSTRING (string
)->data
[0]);
351 return concat2 (string
, string2
);
353 else if (EQ (symbol
, Qexit
))
356 return build_string ("finished\n");
357 string
= Fnumber_to_string (make_number (code
));
358 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
359 return concat2 (build_string ("exited abnormally with code "),
360 concat2 (string
, string2
));
363 return Fcopy_sequence (Fsymbol_name (symbol
));
368 /* Open an available pty, returning a file descriptor.
369 Return -1 on failure.
370 The file name of the terminal corresponding to the pty
371 is left in the variable pty_name. */
380 /* Some systems name their pseudoterminals so that there are gaps in
381 the usual sequence - for example, on HP9000/S700 systems, there
382 are no pseudoterminals with names ending in 'f'. So we wait for
383 three failures in a row before deciding that we've reached the
385 int failed_count
= 0;
390 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
391 for (i
= 0; i
< 16; i
++)
394 #ifdef PTY_NAME_SPRINTF
397 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
398 #endif /* no PTY_NAME_SPRINTF */
402 #else /* no PTY_OPEN */
404 /* Unusual IRIS code */
405 *ptyv
= open ("/dev/ptc", O_RDWR
| O_NDELAY
, 0);
408 if (fstat (fd
, &stb
) < 0)
411 if (stat (pty_name
, &stb
) < 0)
414 if (failed_count
>= 3)
420 fd
= open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
422 fd
= open (pty_name
, O_RDWR
| O_NDELAY
, 0);
424 #endif /* not IRIS */
425 #endif /* no PTY_OPEN */
429 /* check to make certain that both sides are available
430 this avoids a nasty yet stupid bug in rlogins */
431 #ifdef PTY_TTY_NAME_SPRINTF
434 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
435 #endif /* no PTY_TTY_NAME_SPRINTF */
437 if (access (pty_name
, 6) != 0)
440 #if !defined(IRIS) && !defined(__sgi)
446 #endif /* not UNIPLUS */
453 #endif /* HAVE_PTYS */
459 struct Lisp_Vector
*vec
;
460 register Lisp_Object val
, tem
, name1
;
461 register struct Lisp_Process
*p
;
465 vec
= allocate_vectorlike ((EMACS_INT
) VECSIZE (struct Lisp_Process
));
466 for (i
= 0; i
< VECSIZE (struct Lisp_Process
); i
++)
467 vec
->contents
[i
] = Qnil
;
468 vec
->size
= VECSIZE (struct Lisp_Process
);
469 p
= (struct Lisp_Process
*)vec
;
471 XSETINT (p
->infd
, -1);
472 XSETINT (p
->outfd
, -1);
473 XSETFASTINT (p
->pid
, 0);
474 XSETFASTINT (p
->tick
, 0);
475 XSETFASTINT (p
->update_tick
, 0);
476 p
->raw_status_low
= Qnil
;
477 p
->raw_status_high
= Qnil
;
479 p
->mark
= Fmake_marker ();
481 /* If name is already in use, modify it until it is unused. */
486 tem
= Fget_process (name1
);
487 if (NILP (tem
)) break;
488 sprintf (suffix
, "<%d>", i
);
489 name1
= concat2 (name
, build_string (suffix
));
493 XSETPROCESS (val
, p
);
494 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
498 remove_process (proc
)
499 register Lisp_Object proc
;
501 register Lisp_Object pair
;
503 pair
= Frassq (proc
, Vprocess_alist
);
504 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
505 Fset_marker (XPROCESS (proc
)->mark
, Qnil
, Qnil
);
507 deactivate_process (proc
);
510 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
511 "Return t if OBJECT is a process.")
515 return PROCESSP (object
) ? Qt
: Qnil
;
518 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
519 "Return the process named NAME, or nil if there is none.")
521 register Lisp_Object name
;
525 CHECK_STRING (name
, 0);
526 return Fcdr (Fassoc (name
, Vprocess_alist
));
529 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
530 "Return the (or, a) process associated with BUFFER.\n\
531 BUFFER may be a buffer or the name of one.")
533 register Lisp_Object buffer
;
535 register Lisp_Object buf
, tail
, proc
;
537 if (NILP (buffer
)) return Qnil
;
538 buf
= Fget_buffer (buffer
);
539 if (NILP (buf
)) return Qnil
;
541 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
543 proc
= Fcdr (Fcar (tail
));
544 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
550 /* This is how commands for the user decode process arguments. It
551 accepts a process, a process name, a buffer, a buffer name, or nil.
552 Buffers denote the first process in the buffer, and nil denotes the
557 register Lisp_Object name
;
559 register Lisp_Object proc
, obj
;
562 obj
= Fget_process (name
);
564 obj
= Fget_buffer (name
);
566 error ("Process %s does not exist", XSTRING (name
)->data
);
568 else if (NILP (name
))
569 obj
= Fcurrent_buffer ();
573 /* Now obj should be either a buffer object or a process object.
577 proc
= Fget_buffer_process (obj
);
579 error ("Buffer %s has no process", XSTRING (XBUFFER (obj
)->name
)->data
);
583 CHECK_PROCESS (obj
, 0);
589 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
590 "Delete PROCESS: kill it and forget about it immediately.\n\
591 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
592 nil, indicating the current buffer's process.")
594 register Lisp_Object process
;
596 process
= get_process (process
);
597 XPROCESS (process
)->raw_status_low
= Qnil
;
598 XPROCESS (process
)->raw_status_high
= Qnil
;
599 if (NETCONN_P (process
))
601 XPROCESS (process
)->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
602 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
604 else if (XINT (XPROCESS (process
)->infd
) >= 0)
606 Fkill_process (process
, Qnil
);
607 /* Do this now, since remove_process will make sigchld_handler do nothing. */
608 XPROCESS (process
)->status
609 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
610 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
613 remove_process (process
);
617 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
618 "Return the status of PROCESS: a symbol, one of these:\n\
619 run -- for a process that is running.\n\
620 stop -- for a process stopped but continuable.\n\
621 exit -- for a process that has exited.\n\
622 signal -- for a process that has got a fatal signal.\n\
623 open -- for a network stream connection that is open.\n\
624 closed -- for a network stream connection that is closed.\n\
625 nil -- if arg is a process name and no such process exists.\n\
626 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
627 nil, indicating the current buffer's process.")
629 register Lisp_Object process
;
631 register struct Lisp_Process
*p
;
632 register Lisp_Object status
;
634 if (STRINGP (process
))
635 process
= Fget_process (process
);
637 process
= get_process (process
);
642 p
= XPROCESS (process
);
643 if (!NILP (p
->raw_status_low
))
647 status
= XCONS (status
)->car
;
648 if (NETCONN_P (process
))
650 if (EQ (status
, Qrun
))
652 else if (EQ (status
, Qexit
))
658 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
660 "Return the exit status of PROCESS or the signal number that killed it.\n\
661 If PROCESS has not yet exited or died, return 0.")
663 register Lisp_Object process
;
665 CHECK_PROCESS (process
, 0);
666 if (!NILP (XPROCESS (process
)->raw_status_low
))
667 update_status (XPROCESS (process
));
668 if (CONSP (XPROCESS (process
)->status
))
669 return XCONS (XCONS (XPROCESS (process
)->status
)->cdr
)->car
;
670 return make_number (0);
673 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
674 "Return the process id of PROCESS.\n\
675 This is the pid of the Unix process which PROCESS uses or talks to.\n\
676 For a network connection, this value is nil.")
678 register Lisp_Object process
;
680 CHECK_PROCESS (process
, 0);
681 return XPROCESS (process
)->pid
;
684 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
685 "Return the name of PROCESS, as a string.\n\
686 This is the name of the program invoked in PROCESS,\n\
687 possibly modified to make it unique among process names.")
689 register Lisp_Object process
;
691 CHECK_PROCESS (process
, 0);
692 return XPROCESS (process
)->name
;
695 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
696 "Return the command that was executed to start PROCESS.\n\
697 This is a list of strings, the first string being the program executed\n\
698 and the rest of the strings being the arguments given to it.\n\
699 For a non-child channel, this is nil.")
701 register Lisp_Object process
;
703 CHECK_PROCESS (process
, 0);
704 return XPROCESS (process
)->command
;
707 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
708 "Return the name of the terminal PROCESS uses, or nil if none.\n\
709 This is the terminal that the process itself reads and writes on,\n\
710 not the name of the pty that Emacs uses to talk with that terminal.")
712 register Lisp_Object process
;
714 CHECK_PROCESS (process
, 0);
715 return XPROCESS (process
)->tty_name
;
718 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
720 "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).")
722 register Lisp_Object process
, buffer
;
724 CHECK_PROCESS (process
, 0);
726 CHECK_BUFFER (buffer
, 1);
727 XPROCESS (process
)->buffer
= buffer
;
731 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
733 "Return the buffer PROCESS is associated with.\n\
734 Output from PROCESS is inserted in this buffer\n\
735 unless PROCESS has a filter.")
737 register Lisp_Object process
;
739 CHECK_PROCESS (process
, 0);
740 return XPROCESS (process
)->buffer
;
743 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
745 "Return the marker for the end of the last output from PROCESS.")
747 register Lisp_Object process
;
749 CHECK_PROCESS (process
, 0);
750 return XPROCESS (process
)->mark
;
753 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
755 "Give PROCESS the filter function FILTER; nil means no filter.\n\
756 t means stop accepting output from the process.\n\
757 When a process has a filter, each time it does output\n\
758 the entire string of output is passed to the filter.\n\
759 The filter gets two arguments: the process and the string of output.\n\
760 If the process has a filter, its buffer is not used for output.")
762 register Lisp_Object process
, filter
;
764 CHECK_PROCESS (process
, 0);
767 FD_CLR (XINT (XPROCESS (process
)->infd
), &input_wait_mask
);
768 FD_CLR (XINT (XPROCESS (process
)->infd
), &non_keyboard_wait_mask
);
770 else if (EQ (XPROCESS (process
)->filter
, Qt
))
772 FD_SET (XINT (XPROCESS (process
)->infd
), &input_wait_mask
);
773 FD_SET (XINT (XPROCESS (process
)->infd
), &non_keyboard_wait_mask
);
775 XPROCESS (process
)->filter
= filter
;
779 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
781 "Returns the filter function of PROCESS; nil if none.\n\
782 See `set-process-filter' for more info on filter functions.")
784 register Lisp_Object process
;
786 CHECK_PROCESS (process
, 0);
787 return XPROCESS (process
)->filter
;
790 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
792 "Give PROCESS the sentinel SENTINEL; nil for none.\n\
793 The sentinel is called as a function when the process changes state.\n\
794 It gets two arguments: the process, and a string describing the change.")
796 register Lisp_Object process
, sentinel
;
798 CHECK_PROCESS (process
, 0);
799 XPROCESS (process
)->sentinel
= sentinel
;
803 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
805 "Return the sentinel of PROCESS; nil if none.\n\
806 See `set-process-sentinel' for more info on sentinels.")
808 register Lisp_Object process
;
810 CHECK_PROCESS (process
, 0);
811 return XPROCESS (process
)->sentinel
;
814 DEFUN ("set-process-window-size", Fset_process_window_size
,
815 Sset_process_window_size
, 3, 3, 0,
816 "Tell PROCESS that it has logical window size HEIGHT and WIDTH.")
817 (process
, height
, width
)
818 register Lisp_Object process
, height
, width
;
820 CHECK_PROCESS (process
, 0);
821 CHECK_NATNUM (height
, 0);
822 CHECK_NATNUM (width
, 0);
823 if (set_window_size (XINT (XPROCESS (process
)->infd
),
824 XINT (height
), XINT(width
)) <= 0)
830 DEFUN ("process-kill-without-query", Fprocess_kill_without_query
,
831 Sprocess_kill_without_query
, 1, 2, 0,
832 "Say no query needed if PROCESS is running when Emacs is exited.\n\
833 Optional second argument if non-nil says to require a query.\n\
834 Value is t if a query was formerly required.")
836 register Lisp_Object process
, value
;
840 CHECK_PROCESS (process
, 0);
841 tem
= XPROCESS (process
)->kill_without_query
;
842 XPROCESS (process
)->kill_without_query
= Fnull (value
);
847 #if 0 /* Turned off because we don't currently record this info
848 in the process. Perhaps add it. */
849 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
850 "Return the connection type of `PROCESS'.\n\
851 The value is `nil' for a pipe,\n\
852 `t' or `pty' for a pty, or `stream' for a socket connection.")
856 return XPROCESS (process
)->type
;
863 register Lisp_Object tail
, tem
;
864 Lisp_Object proc
, minspace
, tem1
;
865 register struct buffer
*old
= current_buffer
;
866 register struct Lisp_Process
*p
;
870 XSETFASTINT (minspace
, 1);
872 set_buffer_internal (XBUFFER (Vstandard_output
));
873 Fbuffer_disable_undo (Vstandard_output
);
875 current_buffer
->truncate_lines
= Qt
;
878 Proc Status Buffer Tty Command\n\
879 ---- ------ ------ --- -------\n", -1);
881 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
885 proc
= Fcdr (Fcar (tail
));
887 if (NILP (p
->childp
))
890 Finsert (1, &p
->name
);
891 Findent_to (make_number (13), minspace
);
893 if (!NILP (p
->raw_status_low
))
896 if (CONSP (p
->status
))
897 symbol
= XCONS (p
->status
)->car
;
900 if (EQ (symbol
, Qsignal
))
903 tem
= Fcar (Fcdr (p
->status
));
905 if (XINT (tem
) < NSIG
)
906 write_string (sys_errlist
[XINT (tem
)], -1);
909 Fprinc (symbol
, Qnil
);
911 else if (NETCONN_P (proc
))
913 if (EQ (symbol
, Qrun
))
914 write_string ("open", -1);
915 else if (EQ (symbol
, Qexit
))
916 write_string ("closed", -1);
918 Fprinc (symbol
, Qnil
);
921 Fprinc (symbol
, Qnil
);
923 if (EQ (symbol
, Qexit
))
926 tem
= Fcar (Fcdr (p
->status
));
929 sprintf (tembuf
, " %d", (int) XFASTINT (tem
));
930 write_string (tembuf
, -1);
934 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
935 remove_process (proc
);
937 Findent_to (make_number (22), minspace
);
938 if (NILP (p
->buffer
))
939 insert_string ("(none)");
940 else if (NILP (XBUFFER (p
->buffer
)->name
))
941 insert_string ("(Killed)");
943 Finsert (1, &XBUFFER (p
->buffer
)->name
);
945 Findent_to (make_number (37), minspace
);
947 if (STRINGP (p
->tty_name
))
948 Finsert (1, &p
->tty_name
);
950 insert_string ("(none)");
952 Findent_to (make_number (49), minspace
);
954 if (NETCONN_P (proc
))
956 sprintf (tembuf
, "(network stream connection to %s)\n",
957 XSTRING (p
->childp
)->data
);
958 insert_string (tembuf
);
972 insert_string ("\n");
978 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 0, "",
979 "Display a list of all processes.\n\
980 \(Any processes listed as Exited or Signaled are actually eliminated\n\
981 after the listing is made.)")
984 internal_with_output_to_temp_buffer ("*Process List*",
985 list_processes_1
, Qnil
);
989 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
990 "Return a list of all processes.")
993 return Fmapcar (Qcdr
, Vprocess_alist
);
996 /* Starting asynchronous inferior processes. */
998 static Lisp_Object
start_process_unwind ();
1000 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1001 "Start a program in a subprocess. Return the process object for it.\n\
1002 Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\
1003 NAME is name for process. It is modified if necessary to make it unique.\n\
1004 BUFFER is the buffer or (buffer-name) to associate with the process.\n\
1005 Process output goes at end of that buffer, unless you specify\n\
1006 an output stream or filter function to handle the output.\n\
1007 BUFFER may be also nil, meaning that this process is not associated\n\
1009 Third arg is program file name. It is searched for as in the shell.\n\
1010 Remaining arguments are strings to give program as arguments.")
1013 register Lisp_Object
*args
;
1015 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1017 register unsigned char *new_argv
;
1020 register unsigned char **new_argv
;
1023 int count
= specpdl_ptr
- specpdl
;
1027 buffer
= Fget_buffer_create (buffer
);
1029 /* Make sure that the child will be able to chdir to the current
1030 buffer's current directory, or its unhandled equivalent. We
1031 can't just have the child check for an error when it does the
1032 chdir, since it's in a vfork.
1034 We have to GCPRO around this because Fexpand_file_name and
1035 Funhandled_file_name_directory might call a file name handling
1036 function. The argument list is protected by the caller, so all
1037 we really have to worry about is buffer. */
1039 struct gcpro gcpro1
, gcpro2
;
1041 current_dir
= current_buffer
->directory
;
1043 GCPRO2 (buffer
, current_dir
);
1046 = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir
),
1048 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1049 report_file_error ("Setting current directory",
1050 Fcons (current_buffer
->directory
, Qnil
));
1056 CHECK_STRING (name
, 0);
1060 CHECK_STRING (program
, 2);
1063 /* Make a one member argv with all args concatenated
1064 together separated by a blank. */
1065 len
= XSTRING (program
)->size
+ 2;
1066 for (i
= 3; i
< nargs
; i
++)
1069 CHECK_STRING (tem
, i
);
1070 len
+= XSTRING (tem
)->size
+ 1; /* count the blank */
1072 new_argv
= (unsigned char *) alloca (len
);
1073 strcpy (new_argv
, XSTRING (program
)->data
);
1074 for (i
= 3; i
< nargs
; i
++)
1077 CHECK_STRING (tem
, i
);
1078 strcat (new_argv
, " ");
1079 strcat (new_argv
, XSTRING (tem
)->data
);
1081 /* Need to add code here to check for program existence on VMS */
1084 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1086 /* If program file name is not absolute, search our path for it */
1087 if (!IS_DIRECTORY_SEP (XSTRING (program
)->data
[0])
1088 && !(XSTRING (program
)->size
> 1
1089 && IS_DEVICE_SEP (XSTRING (program
)->data
[1])))
1091 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1094 GCPRO4 (name
, program
, buffer
, current_dir
);
1095 openp (Vexec_path
, program
, EXEC_SUFFIXES
, &tem
, 1);
1098 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1099 tem
= Fexpand_file_name (tem
, Qnil
);
1100 new_argv
[0] = XSTRING (tem
)->data
;
1104 if (!NILP (Ffile_directory_p (program
)))
1105 error ("Specified program for new process is a directory");
1107 new_argv
[0] = XSTRING (program
)->data
;
1110 for (i
= 3; i
< nargs
; i
++)
1113 CHECK_STRING (tem
, i
);
1114 new_argv
[i
- 2] = XSTRING (tem
)->data
;
1116 new_argv
[i
- 2] = 0;
1117 #endif /* not VMS */
1119 proc
= make_process (name
);
1120 /* If an error occurs and we can't start the process, we want to
1121 remove it from the process list. This means that each error
1122 check in create_process doesn't need to call remove_process
1123 itself; it's all taken care of here. */
1124 record_unwind_protect (start_process_unwind
, proc
);
1126 XPROCESS (proc
)->childp
= Qt
;
1127 XPROCESS (proc
)->command_channel_p
= Qnil
;
1128 XPROCESS (proc
)->buffer
= buffer
;
1129 XPROCESS (proc
)->sentinel
= Qnil
;
1130 XPROCESS (proc
)->filter
= Qnil
;
1131 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1133 /* Make the process marker point into the process buffer (if any). */
1135 Fset_marker (XPROCESS (proc
)->mark
,
1136 make_number (BUF_ZV (XBUFFER (buffer
))), buffer
);
1138 create_process (proc
, new_argv
, current_dir
);
1140 return unbind_to (count
, proc
);
1143 /* This function is the unwind_protect form for Fstart_process. If
1144 PROC doesn't have its pid set, then we know someone has signaled
1145 an error and the process wasn't started successfully, so we should
1146 remove it from the process list. */
1148 start_process_unwind (proc
)
1151 if (!PROCESSP (proc
))
1154 /* Was PROC started successfully? */
1155 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1156 remove_process (proc
);
1163 create_process_1 (signo
)
1167 /* USG systems forget handlers when they are used;
1168 must reestablish each time */
1169 signal (signo
, create_process_1
);
1173 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1176 /* Mimic blocking of signals on system V, which doesn't really have it. */
1178 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1179 int sigchld_deferred
;
1182 create_process_sigchld ()
1184 signal (SIGCHLD
, create_process_sigchld
);
1186 sigchld_deferred
= 1;
1192 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1193 create_process (process
, new_argv
, current_dir
)
1194 Lisp_Object process
;
1196 Lisp_Object current_dir
;
1198 int pid
, inchannel
, outchannel
;
1200 #ifdef POSIX_SIGNALS
1203 struct sigaction sigint_action
;
1204 struct sigaction sigquit_action
;
1206 struct sigaction sighup_action
;
1208 #else /* !POSIX_SIGNALS */
1210 SIGTYPE (*sigchld
)();
1212 #endif /* !POSIX_SIGNALS */
1213 /* Use volatile to protect variables from being clobbered by longjmp. */
1214 volatile int forkin
, forkout
;
1215 volatile int pty_flag
= 0;
1216 extern char **environ
;
1218 inchannel
= outchannel
= -1;
1221 if (!NILP (Vprocess_connection_type
))
1222 outchannel
= inchannel
= allocate_pty ();
1227 /* On USG systems it does not work to open the pty's tty here
1228 and then close and reopen it in the child. */
1230 /* Don't let this terminal become our controlling terminal
1231 (in case we don't have one). */
1232 forkout
= forkin
= open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1234 forkout
= forkin
= open (pty_name
, O_RDWR
, 0);
1237 report_file_error ("Opening pty", Qnil
);
1239 forkin
= forkout
= -1;
1240 #endif /* not USG */
1244 #endif /* HAVE_PTYS */
1247 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1248 report_file_error ("Opening socketpair", Qnil
);
1249 outchannel
= inchannel
= sv
[0];
1250 forkout
= forkin
= sv
[1];
1252 #else /* not SKTPAIR */
1255 pipe_with_inherited_out (sv
);
1259 pipe_with_inherited_in (sv
);
1262 #else /* not WINDOWSNT */
1269 #endif /* not WINDOWSNT */
1271 #endif /* not SKTPAIR */
1274 /* Replaced by close_process_descs */
1275 set_exclusive_use (inchannel
);
1276 set_exclusive_use (outchannel
);
1279 /* Stride people say it's a mystery why this is needed
1280 as well as the O_NDELAY, but that it fails without this. */
1281 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1284 ioctl (inchannel
, FIONBIO
, &one
);
1289 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1292 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1296 /* Record this as an active process, with its channels.
1297 As a result, child_setup will close Emacs's side of the pipes. */
1298 chan_process
[inchannel
] = process
;
1299 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1300 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1301 /* Record the tty descriptor used in the subprocess. */
1303 XPROCESS (process
)->subtty
= Qnil
;
1305 XSETFASTINT (XPROCESS (process
)->subtty
, forkin
);
1306 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1307 XPROCESS (process
)->status
= Qrun
;
1309 /* Delay interrupts until we have a chance to store
1310 the new fork's pid in its process structure */
1311 #ifdef POSIX_SIGNALS
1312 sigemptyset (&blocked
);
1314 sigaddset (&blocked
, SIGCHLD
);
1317 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1318 this sets the parent's signal handlers as well as the child's.
1319 So delay all interrupts whose handlers the child might munge,
1320 and record the current handlers so they can be restored later. */
1321 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1322 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1324 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1326 #endif /* HAVE_VFORK */
1327 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1328 #else /* !POSIX_SIGNALS */
1332 #else /* not BSD4_1 */
1333 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1334 sigsetmask (sigmask (SIGCHLD
));
1335 #else /* ordinary USG */
1337 sigchld_deferred
= 0;
1338 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1340 #endif /* ordinary USG */
1341 #endif /* not BSD4_1 */
1342 #endif /* SIGCHLD */
1343 #endif /* !POSIX_SIGNALS */
1345 FD_SET (inchannel
, &input_wait_mask
);
1346 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1347 if (inchannel
> max_process_desc
)
1348 max_process_desc
= inchannel
;
1350 /* Until we store the proper pid, enable sigchld_handler
1351 to recognize an unknown pid as standing for this process.
1352 It is very important not to let this `marker' value stay
1353 in the table after this function has returned; if it does
1354 it might cause call-process to hang and subsequent asynchronous
1355 processes to get their return values scrambled. */
1356 XSETINT (XPROCESS (process
)->pid
, -1);
1359 /* child_setup must clobber environ on systems with true vfork.
1360 Protect it from permanent change. */
1361 char **save_environ
= environ
;
1366 #endif /* not WINDOWSNT */
1368 int xforkin
= forkin
;
1369 int xforkout
= forkout
;
1371 #if 0 /* This was probably a mistake--it duplicates code later on,
1372 but fails to handle all the cases. */
1373 /* Make sure SIGCHLD is not blocked in the child. */
1374 sigsetmask (SIGEMPTYMASK
);
1377 /* Make the pty be the controlling terminal of the process. */
1379 /* First, disconnect its current controlling terminal. */
1381 /* We tried doing setsid only if pty_flag, but it caused
1382 process_set_signal to fail on SGI when using a pipe. */
1384 /* Make the pty's terminal the controlling terminal. */
1388 /* We ignore the return value
1389 because faith@cs.unc.edu says that is necessary on Linux. */
1390 ioctl (xforkin
, TIOCSCTTY
, 0);
1393 #else /* not HAVE_SETSID */
1395 /* It's very important to call setpgrp here and no time
1396 afterwards. Otherwise, we lose our controlling tty which
1397 is set when we open the pty. */
1400 #endif /* not HAVE_SETSID */
1401 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1402 if (pty_flag
&& xforkin
>= 0)
1405 tcgetattr (xforkin
, &t
);
1407 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1408 write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1411 #if defined (NTTYDISC) && defined (TIOCSETD)
1412 if (pty_flag
&& xforkin
>= 0)
1414 /* Use new line discipline. */
1415 int ldisc
= NTTYDISC
;
1416 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1421 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1422 can do TIOCSPGRP only to the process's controlling tty. */
1425 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1426 I can't test it since I don't have 4.3. */
1427 int j
= open ("/dev/tty", O_RDWR
, 0);
1428 ioctl (j
, TIOCNOTTY
, 0);
1431 /* In order to get a controlling terminal on some versions
1432 of BSD, it is necessary to put the process in pgrp 0
1433 before it opens the terminal. */
1441 #endif /* TIOCNOTTY */
1443 #if !defined (RTU) && !defined (UNIPLUS)
1444 /*** There is a suggestion that this ought to be a
1445 conditional on TIOCSPGRP. */
1446 /* Now close the pty (if we had it open) and reopen it.
1447 This makes the pty the controlling terminal of the subprocess. */
1450 #ifdef SET_CHILD_PTY_PGRP
1451 int pgrp
= getpid ();
1454 /* I wonder if close (open (pty_name, ...)) would work? */
1457 xforkout
= xforkin
= open (pty_name
, O_RDWR
, 0);
1461 write (1, "Couldn't open the pty terminal ", 31);
1462 write (1, pty_name
, strlen (pty_name
));
1467 #ifdef SET_CHILD_PTY_PGRP
1468 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1469 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1472 #endif /* not UNIPLUS and not RTU */
1473 #ifdef SETUP_SLAVE_PTY
1478 #endif /* SETUP_SLAVE_PTY */
1480 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1481 Now reenable it in the child, so it will die when we want it to. */
1483 signal (SIGHUP
, SIG_DFL
);
1485 #endif /* HAVE_PTYS */
1487 signal (SIGINT
, SIG_DFL
);
1488 signal (SIGQUIT
, SIG_DFL
);
1490 /* Stop blocking signals in the child. */
1491 #ifdef POSIX_SIGNALS
1492 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1493 #else /* !POSIX_SIGNALS */
1497 #else /* not BSD4_1 */
1498 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1499 sigsetmask (SIGEMPTYMASK
);
1500 #else /* ordinary USG */
1502 signal (SIGCHLD
, sigchld
);
1504 #endif /* ordinary USG */
1505 #endif /* not BSD4_1 */
1506 #endif /* SIGCHLD */
1507 #endif /* !POSIX_SIGNALS */
1510 child_setup_tty (xforkout
);
1512 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1513 new_argv
, 1, current_dir
);
1514 #else /* not WINDOWSNT */
1515 child_setup (xforkin
, xforkout
, xforkout
,
1516 new_argv
, 1, current_dir
);
1517 #endif /* not WINDOWSNT */
1519 environ
= save_environ
;
1526 if (forkin
!= forkout
&& forkout
>= 0)
1528 report_file_error ("Doing vfork", Qnil
);
1531 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
1534 register_child (pid
, inchannel
);
1535 #endif /* WINDOWSNT */
1537 /* If the subfork execv fails, and it exits,
1538 this close hangs. I don't know why.
1539 So have an interrupt jar it loose. */
1541 signal (SIGALRM
, create_process_1
);
1543 XPROCESS (process
)->subtty
= Qnil
;
1548 if (forkin
!= forkout
&& forkout
>= 0)
1553 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1556 XPROCESS (process
)->tty_name
= Qnil
;
1558 #ifdef POSIX_SIGNALS
1560 /* Restore the parent's signal handlers. */
1561 sigaction (SIGINT
, &sigint_action
, 0);
1562 sigaction (SIGQUIT
, &sigquit_action
, 0);
1564 sigaction (SIGHUP
, &sighup_action
, 0);
1566 #endif /* HAVE_VFORK */
1567 /* Stop blocking signals in the parent. */
1568 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1569 #else /* !POSIX_SIGNALS */
1573 #else /* not BSD4_1 */
1574 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1575 sigsetmask (SIGEMPTYMASK
);
1576 #else /* ordinary USG */
1578 signal (SIGCHLD
, sigchld
);
1579 /* Now really handle any of these signals
1580 that came in during this function. */
1581 if (sigchld_deferred
)
1582 kill (getpid (), SIGCHLD
);
1584 #endif /* ordinary USG */
1585 #endif /* not BSD4_1 */
1586 #endif /* SIGCHLD */
1587 #endif /* !POSIX_SIGNALS */
1589 #endif /* not VMS */
1593 /* open a TCP network connection to a given HOST/SERVICE. Treated
1594 exactly like a normal process when reading and writing. Only
1595 differences are in status display and process deletion. A network
1596 connection has no PID; you cannot signal it. All you can do is
1597 deactivate and close it via delete-process */
1599 DEFUN ("open-network-stream", Fopen_network_stream
, Sopen_network_stream
,
1601 "Open a TCP connection for a service to a host.\n\
1602 Returns a subprocess-object to represent the connection.\n\
1603 Input and output work as for subprocesses; `delete-process' closes it.\n\
1604 Args are NAME BUFFER HOST SERVICE.\n\
1605 NAME is name for process. It is modified if necessary to make it unique.\n\
1606 BUFFER is the buffer (or buffer-name) to associate with the process.\n\
1607 Process output goes at end of that buffer, unless you specify\n\
1608 an output stream or filter function to handle the output.\n\
1609 BUFFER may be also nil, meaning that this process is not associated\n\
1611 Third arg is name of the host to connect to, or its IP address.\n\
1612 Fourth arg SERVICE is name of the service desired, or an integer\n\
1613 specifying a port number to connect to.")
1614 (name
, buffer
, host
, service
)
1615 Lisp_Object name
, buffer
, host
, service
;
1619 struct sockaddr_in address
;
1620 struct servent
*svc_info
;
1621 struct hostent
*host_info_ptr
, host_info
;
1622 char *(addr_list
[2]);
1623 IN_ADDR numeric_addr
;
1627 struct hostent host_info_fixed
;
1628 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1630 int count
= specpdl_ptr
- specpdl
;
1632 GCPRO4 (name
, buffer
, host
, service
);
1633 CHECK_STRING (name
, 0);
1634 CHECK_STRING (host
, 0);
1635 if (INTEGERP (service
))
1636 port
= htons ((unsigned short) XINT (service
));
1639 CHECK_STRING (service
, 0);
1640 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
1642 error ("Unknown service \"%s\"", XSTRING (service
)->data
);
1643 port
= svc_info
->s_port
;
1646 /* Slow down polling to every ten seconds.
1647 Some kernels have a bug which causes retrying connect to fail
1648 after a connect. Polling can interfere with gethostbyname too. */
1649 #ifdef POLL_FOR_INPUT
1650 bind_polling_period (10);
1659 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
1661 if (! (host_info_ptr
== 0 && h_errno
== TRY_AGAIN
))
1664 Fsleep_for (make_number (1), Qnil
);
1666 if (host_info_ptr
== 0)
1667 /* Attempt to interpret host as numeric inet address */
1669 numeric_addr
= inet_addr ((char *) XSTRING (host
)->data
);
1670 if (NUMERIC_ADDR_ERROR
)
1671 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
1673 host_info_ptr
= &host_info
;
1674 host_info
.h_name
= 0;
1675 host_info
.h_aliases
= 0;
1676 host_info
.h_addrtype
= AF_INET
;
1678 /* Older machines have only one address slot called h_addr.
1679 Newer machines have h_addr_list, but #define h_addr to
1680 be its first element. */
1681 host_info
.h_addr_list
= &(addr_list
[0]);
1683 host_info
.h_addr
= (char*)(&numeric_addr
);
1685 host_info
.h_length
= strlen (addr_list
[0]);
1688 bzero (&address
, sizeof address
);
1689 bcopy (host_info_ptr
->h_addr
, (char *) &address
.sin_addr
,
1690 host_info_ptr
->h_length
);
1691 address
.sin_family
= host_info_ptr
->h_addrtype
;
1692 address
.sin_port
= port
;
1694 s
= socket (host_info_ptr
->h_addrtype
, SOCK_STREAM
, 0);
1696 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1698 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
1699 when connect is interrupted. So let's not let it get interrupted.
1700 Note we do not turn off polling, because polling is only used
1701 when not interrupt_input, and thus not normally used on the systems
1702 which have this bug. On systems which use polling, there's no way
1703 to quit if polling is turned off. */
1704 if (interrupt_input
)
1708 if (connect (s
, (struct sockaddr
*) &address
, sizeof address
) == -1
1709 && errno
!= EISCONN
)
1715 if (errno
== EADDRINUSE
&& retry
< 20)
1717 /* A delay here is needed on some FreeBSD systems,
1718 and it is harmless, since this retrying takes time anyway
1719 and should be infrequent. */
1720 Fsleep_for (make_number (1), Qnil
);
1727 if (interrupt_input
)
1731 report_file_error ("connection failed",
1732 Fcons (host
, Fcons (name
, Qnil
)));
1735 #ifdef POLL_FOR_INPUT
1736 unbind_to (count
, Qnil
);
1739 if (interrupt_input
)
1743 s
= connect_server (0);
1745 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1746 send_command (s
, C_PORT
, 0, "%s:%d", XSTRING (host
)->data
, ntohs (port
));
1747 send_command (s
, C_DUMB
, 1, 0);
1753 report_file_error ("error duplicating socket", Fcons (name
, Qnil
));
1756 buffer
= Fget_buffer_create (buffer
);
1757 proc
= make_process (name
);
1759 chan_process
[inch
] = proc
;
1762 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
1765 fcntl (inch
, F_SETFL
, O_NDELAY
);
1769 XPROCESS (proc
)->childp
= host
;
1770 XPROCESS (proc
)->command_channel_p
= Qnil
;
1771 XPROCESS (proc
)->buffer
= buffer
;
1772 XPROCESS (proc
)->sentinel
= Qnil
;
1773 XPROCESS (proc
)->filter
= Qnil
;
1774 XPROCESS (proc
)->command
= Qnil
;
1775 XPROCESS (proc
)->pid
= Qnil
;
1776 XSETINT (XPROCESS (proc
)->infd
, s
);
1777 XSETINT (XPROCESS (proc
)->outfd
, outch
);
1778 XPROCESS (proc
)->status
= Qrun
;
1779 FD_SET (inch
, &input_wait_mask
);
1780 FD_SET (inch
, &non_keyboard_wait_mask
);
1781 if (inch
> max_process_desc
)
1782 max_process_desc
= inch
;
1787 #endif /* HAVE_SOCKETS */
1789 deactivate_process (proc
)
1792 register int inchannel
, outchannel
;
1793 register struct Lisp_Process
*p
= XPROCESS (proc
);
1795 inchannel
= XINT (p
->infd
);
1796 outchannel
= XINT (p
->outfd
);
1800 /* Beware SIGCHLD hereabouts. */
1801 flush_pending_output (inchannel
);
1804 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
1805 sys$
dassgn (outchannel
);
1806 vs
= get_vms_process_pointer (p
->pid
);
1808 give_back_vms_process_stuff (vs
);
1812 if (outchannel
>= 0 && outchannel
!= inchannel
)
1816 XSETINT (p
->infd
, -1);
1817 XSETINT (p
->outfd
, -1);
1818 chan_process
[inchannel
] = Qnil
;
1819 FD_CLR (inchannel
, &input_wait_mask
);
1820 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
1821 if (inchannel
== max_process_desc
)
1824 /* We just closed the highest-numbered process input descriptor,
1825 so recompute the highest-numbered one now. */
1826 max_process_desc
= 0;
1827 for (i
= 0; i
< MAXDESC
; i
++)
1828 if (!NILP (chan_process
[i
]))
1829 max_process_desc
= i
;
1834 /* Close all descriptors currently in use for communication
1835 with subprocess. This is used in a newly-forked subprocess
1836 to get rid of irrelevant descriptors. */
1838 close_process_descs ()
1842 for (i
= 0; i
< MAXDESC
; i
++)
1844 Lisp_Object process
;
1845 process
= chan_process
[i
];
1846 if (!NILP (process
))
1848 int in
= XINT (XPROCESS (process
)->infd
);
1849 int out
= XINT (XPROCESS (process
)->outfd
);
1852 if (out
>= 0 && in
!= out
)
1859 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
1861 "Allow any pending output from subprocesses to be read by Emacs.\n\
1862 It is read into the process' buffers or given to their filter functions.\n\
1863 Non-nil arg PROCESS means do not return until some output has been received\n\
1865 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
1866 seconds and microseconds to wait; return after that much time whether\n\
1867 or not there is input.\n\
1868 Return non-nil iff we received any output before the timeout expired.")
1869 (process
, timeout
, timeout_msecs
)
1870 register Lisp_Object process
, timeout
, timeout_msecs
;
1875 if (! NILP (timeout_msecs
))
1877 CHECK_NUMBER (timeout_msecs
, 2);
1878 useconds
= XINT (timeout_msecs
);
1879 if (!INTEGERP (timeout
))
1880 XSETINT (timeout
, 0);
1883 int carry
= useconds
/ 1000000;
1885 XSETINT (timeout
, XINT (timeout
) + carry
);
1886 useconds
-= carry
* 1000000;
1888 /* I think this clause is necessary because C doesn't
1889 guarantee a particular rounding direction for negative
1893 XSETINT (timeout
, XINT (timeout
) - 1);
1894 useconds
+= 1000000;
1901 if (! NILP (timeout
))
1903 CHECK_NUMBER (timeout
, 1);
1904 seconds
= XINT (timeout
);
1917 XSETFASTINT (process
, 0);
1920 (wait_reading_process_input (seconds
, useconds
, process
, 0)
1924 /* This variable is different from waiting_for_input in keyboard.c.
1925 It is used to communicate to a lisp process-filter/sentinel (via the
1926 function Fwaiting_for_user_input_p below) whether emacs was waiting
1927 for user-input when that process-filter was called.
1928 waiting_for_input cannot be used as that is by definition 0 when
1929 lisp code is being evalled.
1930 This is also used in record_asynch_buffer_change.
1931 For that purpose, this must be 0
1932 when not inside wait_reading_process_input. */
1933 static int waiting_for_user_input_p
;
1935 /* Read and dispose of subprocess output while waiting for timeout to
1936 elapse and/or keyboard input to be available.
1939 timeout in seconds, or
1940 zero for no limit, or
1941 -1 means gobble data immediately available but don't wait for any.
1944 an additional duration to wait, measured in microseconds.
1945 If this is nonzero and time_limit is 0, then the timeout
1946 consists of MICROSECS only.
1948 READ_KBD is a lisp value:
1949 0 to ignore keyboard input, or
1950 1 to return when input is available, or
1951 -1 meaning caller will actually read the input, so don't throw to
1952 the quit handler, or
1953 a cons cell, meaning wait until its car is non-nil
1954 (and gobble terminal input into the buffer if any arrives), or
1955 a process object, meaning wait until something arrives from that
1956 process. The return value is true iff we read some input from
1959 DO_DISPLAY != 0 means redisplay should be done to show subprocess
1960 output that arrives.
1962 If READ_KBD is a pointer to a struct Lisp_Process, then the
1963 function returns true iff we received input from that process
1964 before the timeout elapsed.
1965 Otherwise, return true iff we received input from any process. */
1967 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
1968 int time_limit
, microsecs
;
1969 Lisp_Object read_kbd
;
1972 register int channel
, nfds
, m
;
1973 static SELECT_TYPE Available
;
1976 EMACS_TIME timeout
, end_time
, garbage
;
1978 int wait_channel
= -1;
1979 struct Lisp_Process
*wait_proc
= 0;
1980 int got_some_input
= 0;
1981 Lisp_Object
*wait_for_cell
= 0;
1983 FD_ZERO (&Available
);
1985 /* If read_kbd is a process to watch, set wait_proc and wait_channel
1987 if (PROCESSP (read_kbd
))
1989 wait_proc
= XPROCESS (read_kbd
);
1990 wait_channel
= XINT (wait_proc
->infd
);
1991 XSETFASTINT (read_kbd
, 0);
1994 /* If waiting for non-nil in a cell, record where. */
1995 if (CONSP (read_kbd
))
1997 wait_for_cell
= &XCONS (read_kbd
)->car
;
1998 XSETFASTINT (read_kbd
, 0);
2001 waiting_for_user_input_p
= XINT (read_kbd
);
2003 /* Since we may need to wait several times,
2004 compute the absolute time to return at. */
2005 if (time_limit
|| microsecs
)
2007 EMACS_GET_TIME (end_time
);
2008 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
2009 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
2014 /* If calling from keyboard input, do not quit
2015 since we want to return C-g as an input character.
2016 Otherwise, do pending quit if requested. */
2017 if (XINT (read_kbd
) >= 0)
2020 /* Exit now if the cell we're waiting for became non-nil. */
2021 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2024 /* Compute time from now till when time limit is up */
2025 /* Exit if already run out */
2026 if (time_limit
== -1)
2028 /* -1 specified for timeout means
2029 gobble output available now
2030 but don't wait at all. */
2032 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2034 else if (time_limit
|| microsecs
)
2036 EMACS_GET_TIME (timeout
);
2037 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
2038 if (EMACS_TIME_NEG_P (timeout
))
2043 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
2046 /* Cause C-g and alarm signals to take immediate action,
2047 and cause input available signals to zero out timeout.
2049 It is important that we do this before checking for process
2050 activity. If we get a SIGCHLD after the explicit checks for
2051 process activity, timeout is the only way we will know. */
2052 if (XINT (read_kbd
) < 0)
2053 set_waiting_for_input (&timeout
);
2055 /* If status of something has changed, and no input is
2056 available, notify the user of the change right away. After
2057 this explicit check, we'll let the SIGCHLD handler zap
2058 timeout to get our attention. */
2059 if (update_tick
!= process_tick
&& do_display
)
2061 Atemp
= input_wait_mask
;
2062 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2063 if ((select (MAXDESC
, &Atemp
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2067 /* It's okay for us to do this and then continue with
2068 the loop, since timeout has already been zeroed out. */
2069 clear_waiting_for_input ();
2074 /* Don't wait for output from a non-running process. */
2075 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
2076 update_status (wait_proc
);
2078 && ! EQ (wait_proc
->status
, Qrun
))
2080 clear_waiting_for_input ();
2084 /* Wait till there is something to do */
2086 if (! XINT (read_kbd
) && wait_for_cell
== 0)
2087 Available
= non_keyboard_wait_mask
;
2089 Available
= input_wait_mask
;
2091 /* If frame size has changed or the window is newly mapped,
2092 redisplay now, before we start to wait. There is a race
2093 condition here; if a SIGIO arrives between now and the select
2094 and indicates that a frame is trashed, the select may block
2095 displaying a trashed screen. */
2096 if (frame_garbaged
&& do_display
)
2098 clear_waiting_for_input ();
2099 redisplay_preserve_echo_area ();
2100 if (XINT (read_kbd
) < 0)
2101 set_waiting_for_input (&timeout
);
2104 if (XINT (read_kbd
) && detect_input_pending ())
2107 FD_ZERO (&Available
);
2110 nfds
= select (MAXDESC
, &Available
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2115 /* Make C-g and alarm signals set flags again */
2116 clear_waiting_for_input ();
2118 /* If we woke up due to SIGWINCH, actually change size now. */
2119 do_pending_window_change ();
2121 if (time_limit
&& nfds
== 0) /* timeout elapsed */
2125 if (xerrno
== EINTR
)
2126 FD_ZERO (&Available
);
2128 /* Ultrix select seems to return ENOMEM when it is
2129 interrupted. Treat it just like EINTR. Bleah. Note
2130 that we want to test for the "ultrix" CPP symbol, not
2131 "__ultrix__"; the latter is only defined under GCC, but
2132 not by DEC's bundled CC. -JimB */
2133 else if (xerrno
== ENOMEM
)
2134 FD_ZERO (&Available
);
2137 /* This happens for no known reason on ALLIANT.
2138 I am guessing that this is the right response. -- RMS. */
2139 else if (xerrno
== EFAULT
)
2140 FD_ZERO (&Available
);
2142 else if (xerrno
== EBADF
)
2145 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
2146 the child's closure of the pts gives the parent a SIGHUP, and
2147 the ptc file descriptor is automatically closed,
2148 yielding EBADF here or at select() call above.
2149 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
2150 in m/ibmrt-aix.h), and here we just ignore the select error.
2151 Cleanup occurs c/o status_notify after SIGCLD. */
2152 FD_ZERO (&Available
); /* Cannot depend on values returned */
2158 error("select error: %s", strerror (xerrno
));
2160 #if defined(sun) && !defined(USG5_4)
2161 else if (nfds
> 0 && keyboard_bit_set (&Available
)
2163 /* System sometimes fails to deliver SIGIO.
2165 David J. Mackenzie says that Emacs doesn't compile under
2166 Solaris if this code is enabled, thus the USG5_4 in the CPP
2167 conditional. "I haven't noticed any ill effects so far.
2168 If you find a Solaris expert somewhere, they might know
2170 kill (getpid (), SIGIO
);
2173 /* Check for keyboard input */
2174 /* If there is any, return immediately
2175 to give it higher priority than subprocesses */
2177 /* We used to do this if wait_for_cell,
2178 but that caused infinite recursion in selection request events. */
2179 if ((XINT (read_kbd
) || wait_for_cell
)
2180 && detect_input_pending ())
2183 if (detect_input_pending ())
2187 /* Exit now if the cell we're waiting for became non-nil. */
2188 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2192 /* If we think we have keyboard input waiting, but didn't get SIGIO
2193 go read it. This can happen with X on BSD after logging out.
2194 In that case, there really is no input and no SIGIO,
2195 but select says there is input. */
2197 if (XINT (read_kbd
) && interrupt_input
2198 && (keyboard_bit_set (&Available
)))
2203 got_some_input
|= nfds
> 0;
2205 /* If checking input just got us a size-change event from X,
2206 obey it now if we should. */
2207 if (XINT (read_kbd
) || wait_for_cell
)
2208 do_pending_window_change ();
2210 /* Check for data from a process. */
2211 /* Really FIRST_PROC_DESC should be 0 on Unix,
2212 but this is safer in the short run. */
2213 for (channel
= 0; channel
<= max_process_desc
; channel
++)
2215 if (FD_ISSET (channel
, &Available
)
2216 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
2220 /* If waiting for this channel, arrange to return as
2221 soon as no more input to be processed. No more
2223 if (wait_channel
== channel
)
2229 proc
= chan_process
[channel
];
2233 /* Read data from the process, starting with our
2234 buffered-ahead character if we have one. */
2236 nread
= read_process_output (proc
, channel
);
2239 /* Since read_process_output can run a filter,
2240 which can call accept-process-output,
2241 don't try to read from any other processes
2242 before doing the select again. */
2243 FD_ZERO (&Available
);
2246 redisplay_preserve_echo_area ();
2249 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2253 else if (nread
== -1 && errno
== EAGAIN
)
2257 else if (nread
== -1 && errno
== EAGAIN
)
2259 /* Note that we cannot distinguish between no input
2260 available now and a closed pipe.
2261 With luck, a closed pipe will be accompanied by
2262 subprocess termination and SIGCHLD. */
2263 else if (nread
== 0 && !NETCONN_P (proc
))
2265 #endif /* O_NDELAY */
2266 #endif /* O_NONBLOCK */
2267 #endif /* EWOULDBLOCK */
2269 /* On some OSs with ptys, when the process on one end of
2270 a pty exits, the other end gets an error reading with
2271 errno = EIO instead of getting an EOF (0 bytes read).
2272 Therefore, if we get an error reading and errno =
2273 EIO, just continue, because the child process has
2274 exited and should clean itself up soon (e.g. when we
2276 else if (nread
== -1 && errno
== EIO
)
2278 #endif /* HAVE_PTYS */
2279 /* If we can detect process termination, don't consider the process
2280 gone just because its pipe is closed. */
2282 else if (nread
== 0 && !NETCONN_P (proc
))
2287 /* Preserve status of processes already terminated. */
2288 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2289 deactivate_process (proc
);
2290 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2291 update_status (XPROCESS (proc
));
2292 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2293 XPROCESS (proc
)->status
2294 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2297 } /* end for each file descriptor */
2298 } /* end while exit conditions not met */
2300 waiting_for_user_input_p
= 0;
2302 /* If calling from keyboard input, do not quit
2303 since we want to return C-g as an input character.
2304 Otherwise, do pending quit if requested. */
2305 if (XINT (read_kbd
) >= 0)
2307 /* Prevent input_pending from remaining set if we quit. */
2308 clear_input_pending ();
2312 return got_some_input
;
2315 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
2318 read_process_output_call (fun_and_args
)
2319 Lisp_Object fun_and_args
;
2321 return apply1 (XCONS (fun_and_args
)->car
, XCONS (fun_and_args
)->cdr
);
2325 read_process_output_error_handler (error
)
2328 cmd_error_internal (error
, "error in process filter: ");
2330 update_echo_area ();
2331 Fsleep_for (make_number (2), Qnil
);
2334 /* Read pending output from the process channel,
2335 starting with our buffered-ahead character if we have one.
2336 Yield number of characters read.
2338 This function reads at most 1024 characters.
2339 If you want to read all available subprocess output,
2340 you must call it repeatedly until it returns zero. */
2342 read_process_output (proc
, channel
)
2344 register int channel
;
2346 register int nchars
;
2352 register Lisp_Object outstream
;
2353 register struct buffer
*old
= current_buffer
;
2354 register struct Lisp_Process
*p
= XPROCESS (proc
);
2355 register int opoint
;
2358 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2360 vs
= get_vms_process_pointer (p
->pid
);
2364 return(0); /* Really weird if it does this */
2365 if (!(vs
->iosb
[0] & 1))
2366 return -1; /* I/O error */
2369 error ("Could not get VMS process pointer");
2370 chars
= vs
->inputBuffer
;
2371 nchars
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2374 start_vms_process_read (vs
); /* Crank up the next read on the process */
2375 return 1; /* Nothing worth printing, say we got 1 */
2379 if (proc_buffered_char
[channel
] < 0)
2381 nchars
= read_child_output (channel
, chars
, sizeof (chars
));
2383 nchars
= read (channel
, chars
, sizeof chars
);
2387 chars
[0] = proc_buffered_char
[channel
];
2388 proc_buffered_char
[channel
] = -1;
2390 nchars
= read_child_output (channel
, chars
+ 1, sizeof (chars
) - 1);
2392 nchars
= read (channel
, chars
+ 1, sizeof chars
- 1);
2397 nchars
= nchars
+ 1;
2399 #endif /* not VMS */
2401 if (nchars
<= 0) return nchars
;
2403 outstream
= p
->filter
;
2404 if (!NILP (outstream
))
2406 /* We inhibit quit here instead of just catching it so that
2407 hitting ^G when a filter happens to be running won't screw
2409 int count
= specpdl_ptr
- specpdl
;
2410 Lisp_Object odeactivate
;
2411 Lisp_Object obuffer
, okeymap
;
2413 /* No need to gcpro these, because all we do with them later
2414 is test them for EQness, and none of them should be a string. */
2415 odeactivate
= Vdeactivate_mark
;
2416 XSETBUFFER (obuffer
, current_buffer
);
2417 okeymap
= current_buffer
->keymap
;
2419 specbind (Qinhibit_quit
, Qt
);
2420 specbind (Qlast_nonmenu_event
, Qt
);
2422 running_asynch_code
= 1;
2423 internal_condition_case_1 (read_process_output_call
,
2426 Fcons (make_string (chars
,
2429 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
2430 read_process_output_error_handler
);
2431 running_asynch_code
= 0;
2432 restore_match_data ();
2434 /* Handling the process output should not deactivate the mark. */
2435 Vdeactivate_mark
= odeactivate
;
2437 #if 0 /* Call record_asynch_buffer_change unconditionally,
2438 because we might have changed minor modes or other things
2439 that affect key bindings. */
2440 if (! EQ (Fcurrent_buffer (), obuffer
)
2441 || ! EQ (current_buffer
->keymap
, okeymap
))
2443 /* But do it only if the caller is actually going to read events.
2444 Otherwise there's no need to make him wake up, and it could
2445 cause trouble (for example it would make Fsit_for return). */
2446 if (waiting_for_user_input_p
== -1)
2447 record_asynch_buffer_change ();
2450 start_vms_process_read (vs
);
2452 unbind_to (count
, Qnil
);
2456 /* If no filter, write into buffer if it isn't dead. */
2457 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2459 Lisp_Object old_read_only
;
2460 Lisp_Object old_begv
, old_zv
;
2461 Lisp_Object odeactivate
;
2463 odeactivate
= Vdeactivate_mark
;
2465 Fset_buffer (p
->buffer
);
2467 old_read_only
= current_buffer
->read_only
;
2468 XSETFASTINT (old_begv
, BEGV
);
2469 XSETFASTINT (old_zv
, ZV
);
2471 current_buffer
->read_only
= Qnil
;
2473 /* Insert new output into buffer
2474 at the current end-of-output marker,
2475 thus preserving logical ordering of input and output. */
2476 if (XMARKER (p
->mark
)->buffer
)
2477 SET_PT (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
));
2481 /* If the output marker is outside of the visible region, save
2482 the restriction and widen. */
2483 if (! (BEGV
<= point
&& point
<= ZV
))
2486 /* Make sure opoint floats ahead of any new text, just as point
2488 if (point
<= opoint
)
2491 /* Insert after old_begv, but before old_zv. */
2492 if (point
< XFASTINT (old_begv
))
2493 XSETFASTINT (old_begv
, XFASTINT (old_begv
) + nchars
);
2494 if (point
<= XFASTINT (old_zv
))
2495 XSETFASTINT (old_zv
, XFASTINT (old_zv
) + nchars
);
2497 /* Insert before markers in case we are inserting where
2498 the buffer's mark is, and the user's next command is Meta-y. */
2499 insert_before_markers (chars
, nchars
);
2500 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
2502 update_mode_lines
++;
2504 /* If the restriction isn't what it should be, set it. */
2505 if (XFASTINT (old_begv
) != BEGV
|| XFASTINT (old_zv
) != ZV
)
2506 Fnarrow_to_region (old_begv
, old_zv
);
2508 /* Handling the process output should not deactivate the mark. */
2509 Vdeactivate_mark
= odeactivate
;
2511 current_buffer
->read_only
= old_read_only
;
2513 set_buffer_internal (old
);
2516 start_vms_process_read (vs
);
2521 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
2523 "Returns non-nil if emacs is waiting for input from the user.\n\
2524 This is intended for use by asynchronous process output filters and sentinels.")
2527 return (waiting_for_user_input_p
? Qt
: Qnil
);
2530 /* Sending data to subprocess */
2532 jmp_buf send_process_frame
;
2535 send_process_trap ()
2541 longjmp (send_process_frame
, 1);
2544 /* Send some data to process PROC.
2545 BUF is the beginning of the data; LEN is the number of characters.
2546 OBJECT is the Lisp object that the data comes from. */
2548 send_process (proc
, buf
, len
, object
)
2549 volatile Lisp_Object proc
;
2554 /* Use volatile to protect variables from being clobbered by longjmp. */
2556 volatile unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
2559 struct Lisp_Process
*p
= XPROCESS (proc
);
2560 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2563 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2564 update_status (XPROCESS (proc
));
2565 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2566 error ("Process %s not running", procname
);
2569 vs
= get_vms_process_pointer (p
->pid
);
2571 error ("Could not find this process: %x", p
->pid
);
2572 else if (write_to_vms_process (vs
, buf
, len
))
2576 if (pty_max_bytes
== 0)
2578 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
2579 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
2581 if (pty_max_bytes
< 0)
2582 pty_max_bytes
= 250;
2584 pty_max_bytes
= 250;
2586 /* Deduct one, to leave space for the eof. */
2590 if (!setjmp (send_process_frame
))
2594 SIGTYPE (*old_sigpipe
)();
2597 /* Decide how much data we can send in one batch.
2598 Long lines need to be split into multiple batches. */
2599 if (!NILP (XPROCESS (proc
)->pty_flag
))
2601 /* Starting this at zero is always correct when not the first iteration
2602 because the previous iteration ended by sending C-d.
2603 It may not be correct for the first iteration
2604 if a partial line was sent in a separate send_process call.
2605 If that proves worth handling, we need to save linepos
2606 in the process object. */
2609 char *end
= buf
+ len
;
2611 /* Scan through this text for a line that is too long. */
2612 while (ptr
!= end
&& linepos
< pty_max_bytes
)
2620 /* If we found one, break the line there
2621 and put in a C-d to force the buffer through. */
2625 /* Send this batch, using one or more write calls. */
2628 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
2629 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
2630 signal (SIGPIPE
, old_sigpipe
);
2636 || errno
== EWOULDBLOCK
2642 /* Buffer is full. Wait, accepting input;
2643 that may allow the program
2644 to finish doing output and read more. */
2649 /* Running filters might relocate buffers or strings.
2650 Arrange to relocate BUF. */
2651 if (BUFFERP (object
))
2652 offset
= BUF_PTR_CHAR_POS (XBUFFER (object
),
2653 (unsigned char *) buf
);
2654 else if (STRINGP (object
))
2655 offset
= buf
- (char *) XSTRING (object
)->data
;
2657 XSETFASTINT (zero
, 0);
2658 wait_reading_process_input (1, 0, zero
, 0);
2660 if (BUFFERP (object
))
2661 buf
= (char *) BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
2662 else if (STRINGP (object
))
2663 buf
= offset
+ (char *) XSTRING (object
)->data
;
2668 /* This is a real error. */
2669 report_file_error ("writing to process", Fcons (proc
, Qnil
));
2676 /* If we sent just part of the string, put in an EOF
2677 to force it through, before we send the rest. */
2679 Fprocess_send_eof (proc
);
2684 XPROCESS (proc
)->raw_status_low
= Qnil
;
2685 XPROCESS (proc
)->raw_status_high
= Qnil
;
2686 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2687 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2688 deactivate_process (proc
);
2690 error ("Error writing to process %s; closed it", procname
);
2692 error ("SIGPIPE raised on process %s; closed it", procname
);
2697 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
2699 "Send current contents of region as input to PROCESS.\n\
2700 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2701 nil, indicating the current buffer's process.\n\
2702 Called from program, takes three arguments, PROCESS, START and END.\n\
2703 If the region is more than 500 characters long,\n\
2704 it is sent in several bunches. This may happen even for shorter regions.\n\
2705 Output from processes can arrive in between bunches.")
2706 (process
, start
, end
)
2707 Lisp_Object process
, start
, end
;
2712 proc
= get_process (process
);
2713 validate_region (&start
, &end
);
2715 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
2718 start1
= XINT (start
);
2719 send_process (proc
, &FETCH_CHAR (start1
), XINT (end
) - XINT (start
),
2720 Fcurrent_buffer ());
2725 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
2727 "Send PROCESS the contents of STRING as input.\n\
2728 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2729 nil, indicating the current buffer's process.\n\
2730 If STRING is more than 500 characters long,\n\
2731 it is sent in several bunches. This may happen even for shorter strings.\n\
2732 Output from processes can arrive in between bunches.")
2734 Lisp_Object process
, string
;
2737 CHECK_STRING (string
, 1);
2738 proc
= get_process (process
);
2739 send_process (proc
, XSTRING (string
)->data
, XSTRING (string
)->size
, string
);
2743 /* send a signal number SIGNO to PROCESS.
2744 CURRENT_GROUP means send to the process group that currently owns
2745 the terminal being used to communicate with PROCESS.
2746 This is used for various commands in shell mode.
2747 If NOMSG is zero, insert signal-announcements into process's buffers
2750 If we can, we try to signal PROCESS by sending control characters
2751 down the pty. This allows us to signal inferiors who have changed
2752 their uid, for which killpg would return an EPERM error. */
2755 process_send_signal (process
, signo
, current_group
, nomsg
)
2756 Lisp_Object process
;
2758 Lisp_Object current_group
;
2762 register struct Lisp_Process
*p
;
2766 proc
= get_process (process
);
2767 p
= XPROCESS (proc
);
2769 if (!EQ (p
->childp
, Qt
))
2770 error ("Process %s is not a subprocess",
2771 XSTRING (p
->name
)->data
);
2772 if (XINT (p
->infd
) < 0)
2773 error ("Process %s is not active",
2774 XSTRING (p
->name
)->data
);
2776 if (NILP (p
->pty_flag
))
2777 current_group
= Qnil
;
2779 /* If we are using pgrps, get a pgrp number and make it negative. */
2780 if (!NILP (current_group
))
2782 #ifdef SIGNALS_VIA_CHARACTERS
2783 /* If possible, send signals to the entire pgrp
2784 by sending an input character to it. */
2786 /* TERMIOS is the latest and bestest, and seems most likely to
2787 work. If the system has it, use it. */
2794 tcgetattr (XINT (p
->infd
), &t
);
2795 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2799 tcgetattr (XINT (p
->infd
), &t
);
2800 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2804 tcgetattr (XINT (p
->infd
), &t
);
2805 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
2806 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2808 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
2813 #else /* ! HAVE_TERMIOS */
2815 /* On Berkeley descendants, the following IOCTL's retrieve the
2816 current control characters. */
2817 #if defined (TIOCGLTC) && defined (TIOCGETC)
2825 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2826 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
2829 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2830 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
2834 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
2835 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
2837 #endif /* ! defined (SIGTSTP) */
2840 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2842 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
2849 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2850 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2853 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2854 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2858 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2859 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2861 #endif /* ! defined (SIGTSTP) */
2863 #else /* ! defined (TCGETA) */
2864 Your configuration files are messed up
.
2865 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
2866 you'd better be using one of the alternatives above! */
2867 #endif /* ! defined (TCGETA) */
2868 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2869 #endif /* ! defined HAVE_TERMIOS */
2870 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
2873 /* Get the pgrp using the tty itself, if we have that.
2874 Otherwise, use the pty to get the pgrp.
2875 On pfa systems, saka@pfu.fujitsu.co.JP writes:
2876 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
2877 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
2878 His patch indicates that if TIOCGPGRP returns an error, then
2879 we should just assume that p->pid is also the process group id. */
2883 if (!NILP (p
->subtty
))
2884 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
2886 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
2890 gid
= - XFASTINT (p
->pid
);
2891 #endif /* ! defined (pfa) */
2897 #else /* ! defined (TIOCGPGRP ) */
2898 /* Can't select pgrps on this system, so we know that
2899 the child itself heads the pgrp. */
2900 gid
= - XFASTINT (p
->pid
);
2901 #endif /* ! defined (TIOCGPGRP ) */
2904 gid
= - XFASTINT (p
->pid
);
2910 p
->raw_status_low
= Qnil
;
2911 p
->raw_status_high
= Qnil
;
2913 XSETINT (p
->tick
, ++process_tick
);
2917 #endif /* ! defined (SIGCONT) */
2920 send_process (proc
, "\003", 1, Qnil
); /* ^C */
2925 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
2930 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
2933 flush_pending_output (XINT (p
->infd
));
2937 /* If we don't have process groups, send the signal to the immediate
2938 subprocess. That isn't really right, but it's better than any
2939 obvious alternative. */
2942 kill (XFASTINT (p
->pid
), signo
);
2946 /* gid may be a pid, or minus a pgrp's number */
2948 if (!NILP (current_group
))
2949 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
2952 gid
= - XFASTINT (p
->pid
);
2955 #else /* ! defined (TIOCSIGSEND) */
2956 EMACS_KILLPG (-gid
, signo
);
2957 #endif /* ! defined (TIOCSIGSEND) */
2960 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
2961 "Interrupt process PROCESS. May be process or name of one.\n\
2962 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
2963 nil or no arg means current buffer's process.\n\
2964 Second arg CURRENT-GROUP non-nil means send signal to\n\
2965 the current process-group of the process's controlling terminal\n\
2966 rather than to the process's own process group.\n\
2967 If the process is a shell, this means interrupt current subjob\n\
2968 rather than the shell.")
2969 (process
, current_group
)
2970 Lisp_Object process
, current_group
;
2972 process_send_signal (process
, SIGINT
, current_group
, 0);
2976 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
2977 "Kill process PROCESS. May be process or name of one.\n\
2978 See function `interrupt-process' for more details on usage.")
2979 (process
, current_group
)
2980 Lisp_Object process
, current_group
;
2982 process_send_signal (process
, SIGKILL
, current_group
, 0);
2986 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
2987 "Send QUIT signal to process PROCESS. May be process or name of one.\n\
2988 See function `interrupt-process' for more details on usage.")
2989 (process
, current_group
)
2990 Lisp_Object process
, current_group
;
2992 process_send_signal (process
, SIGQUIT
, current_group
, 0);
2996 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
2997 "Stop process PROCESS. May be process or name of one.\n\
2998 See function `interrupt-process' for more details on usage.")
2999 (process
, current_group
)
3000 Lisp_Object process
, current_group
;
3003 error ("no SIGTSTP support");
3005 process_send_signal (process
, SIGTSTP
, current_group
, 0);
3010 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
3011 "Continue process PROCESS. May be process or name of one.\n\
3012 See function `interrupt-process' for more details on usage.")
3013 (process
, current_group
)
3014 Lisp_Object process
, current_group
;
3017 process_send_signal (process
, SIGCONT
, current_group
, 0);
3019 error ("no SIGCONT support");
3024 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
3025 2, 2, "nProcess number: \nnSignal code: ",
3026 "Send the process with process id PID the signal with code SIGCODE.\n\
3027 PID must be an integer. The process need not be a child of this Emacs.\n\
3028 SIGCODE may be an integer, or a symbol whose name is a signal name.")
3030 Lisp_Object pid
, sigcode
;
3032 CHECK_NUMBER (pid
, 0);
3034 #define handle_signal(NAME, VALUE) \
3035 else if (!strcmp (name, NAME)) \
3036 XSETINT (sigcode, VALUE)
3038 if (INTEGERP (sigcode
))
3042 unsigned char *name
;
3044 CHECK_SYMBOL (sigcode
, 1);
3045 name
= XSYMBOL (sigcode
)->name
->data
;
3050 handle_signal ("SIGHUP", SIGHUP
);
3053 handle_signal ("SIGINT", SIGINT
);
3056 handle_signal ("SIGQUIT", SIGQUIT
);
3059 handle_signal ("SIGILL", SIGILL
);
3062 handle_signal ("SIGABRT", SIGABRT
);
3065 handle_signal ("SIGEMT", SIGEMT
);
3068 handle_signal ("SIGKILL", SIGKILL
);
3071 handle_signal ("SIGFPE", SIGFPE
);
3074 handle_signal ("SIGBUS", SIGBUS
);
3077 handle_signal ("SIGSEGV", SIGSEGV
);
3080 handle_signal ("SIGSYS", SIGSYS
);
3083 handle_signal ("SIGPIPE", SIGPIPE
);
3086 handle_signal ("SIGALRM", SIGALRM
);
3089 handle_signal ("SIGTERM", SIGTERM
);
3092 handle_signal ("SIGURG", SIGURG
);
3095 handle_signal ("SIGSTOP", SIGSTOP
);
3098 handle_signal ("SIGTSTP", SIGTSTP
);
3101 handle_signal ("SIGCONT", SIGCONT
);
3104 handle_signal ("SIGCHLD", SIGCHLD
);
3107 handle_signal ("SIGTTIN", SIGTTIN
);
3110 handle_signal ("SIGTTOU", SIGTTOU
);
3113 handle_signal ("SIGIO", SIGIO
);
3116 handle_signal ("SIGXCPU", SIGXCPU
);
3119 handle_signal ("SIGXFSZ", SIGXFSZ
);
3122 handle_signal ("SIGVTALRM", SIGVTALRM
);
3125 handle_signal ("SIGPROF", SIGPROF
);
3128 handle_signal ("SIGWINCH", SIGWINCH
);
3131 handle_signal ("SIGINFO", SIGINFO
);
3134 handle_signal ("SIGUSR1", SIGUSR1
);
3137 handle_signal ("SIGUSR2", SIGUSR2
);
3140 error ("Undefined signal name %s", name
);
3143 #undef handle_signal
3146 /* Only works for kill-type signals */
3147 return make_number (win32_kill_process (XINT (pid
), XINT (sigcode
)));
3149 return make_number (kill (XINT (pid
), XINT (sigcode
)));
3153 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
3154 "Make PROCESS see end-of-file in its input.\n\
3155 Eof comes after any text already sent to it.\n\
3156 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3157 nil, indicating the current buffer's process.\n\
3158 If PROCESS is a network connection, or is a process communicating\n\
3159 through a pipe (as opposed to a pty), then you cannot send any more\n\
3160 text to PROCESS after you call this function.")
3162 Lisp_Object process
;
3166 proc
= get_process (process
);
3168 /* Make sure the process is really alive. */
3169 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3170 update_status (XPROCESS (proc
));
3171 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3172 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
3175 send_process (proc
, "\032", 1, Qnil
); /* ^z */
3177 if (!NILP (XPROCESS (proc
)->pty_flag
))
3178 send_process (proc
, "\004", 1, Qnil
);
3181 close (XINT (XPROCESS (proc
)->outfd
));
3182 XSETINT (XPROCESS (proc
)->outfd
, open (NULL_DEVICE
, O_WRONLY
));
3188 /* Kill all processes associated with `buffer'.
3189 If `buffer' is nil, kill all processes */
3191 kill_buffer_processes (buffer
)
3194 Lisp_Object tail
, proc
;
3196 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3198 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3199 if (GC_PROCESSP (proc
)
3200 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
3202 if (NETCONN_P (proc
))
3203 Fdelete_process (proc
);
3204 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
3205 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
3210 /* On receipt of a signal that a child status has changed,
3211 loop asking about children with changed statuses until
3212 the system says there are no more.
3213 All we do is change the status;
3214 we do not run sentinels or print notifications.
3215 That is saved for the next time keyboard input is done,
3216 in order to avoid timing errors. */
3218 /** WARNING: this can be called during garbage collection.
3219 Therefore, it must not be fooled by the presence of mark bits in
3222 /** USG WARNING: Although it is not obvious from the documentation
3223 in signal(2), on a USG system the SIGCLD handler MUST NOT call
3224 signal() before executing at least one wait(), otherwise the handler
3225 will be called again, resulting in an infinite loop. The relevant
3226 portion of the documentation reads "SIGCLD signals will be queued
3227 and the signal-catching function will be continually reentered until
3228 the queue is empty". Invoking signal() causes the kernel to reexamine
3229 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
3232 sigchld_handler (signo
)
3235 int old_errno
= errno
;
3237 register struct Lisp_Process
*p
;
3238 extern EMACS_TIME
*input_available_clear_time
;
3242 sigheld
|= sigbit (SIGCHLD
);
3254 #endif /* no WUNTRACED */
3255 /* Keep trying to get a status until we get a definitive result. */
3259 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
3261 while (pid
<= 0 && errno
== EINTR
);
3265 /* A real failure. We have done all our job, so return. */
3267 /* USG systems forget handlers when they are used;
3268 must reestablish each time */
3270 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
3273 sigheld
&= ~sigbit (SIGCHLD
);
3281 #endif /* no WNOHANG */
3283 /* Find the process that signaled us, and record its status. */
3286 for (tail
= Vprocess_alist
; XSYMBOL (tail
) != XSYMBOL (Qnil
); tail
= XCONS (tail
)->cdr
)
3288 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3289 p
= XPROCESS (proc
);
3290 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
3295 /* Look for an asynchronous process whose pid hasn't been filled
3298 for (tail
= Vprocess_alist
; XSYMBOL (tail
) != XSYMBOL (Qnil
); tail
= XCONS (tail
)->cdr
)
3300 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3301 p
= XPROCESS (proc
);
3302 if (INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
3307 /* Change the status of the process that was found. */
3310 union { int i
; WAITTYPE wt
; } u
;
3311 int clear_desc_flag
= 0;
3313 XSETINT (p
->tick
, ++process_tick
);
3315 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
3316 XSETINT (p
->raw_status_high
, u
.i
>> 16);
3318 /* If process has terminated, stop waiting for its output. */
3319 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
3320 && XINT (p
->infd
) >= 0)
3321 clear_desc_flag
= 1;
3323 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
3324 if (clear_desc_flag
)
3326 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
3327 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
3330 /* Tell wait_reading_process_input that it needs to wake up and
3332 if (input_available_clear_time
)
3333 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3336 /* There was no asynchronous process found for that id. Check
3337 if we have a synchronous process. */
3340 synch_process_alive
= 0;
3342 /* Report the status of the synchronous process. */
3344 synch_process_retcode
= WRETCODE (w
);
3345 else if (WIFSIGNALED (w
))
3347 int code
= WTERMSIG (w
);
3353 /* Suppress warning if the table has const char *. */
3354 signame
= (char *) sys_siglist
[code
];
3356 signame
= sys_errlist
[code
];
3360 signame
= "unknown";
3362 synch_process_death
= signame
;
3365 /* Tell wait_reading_process_input that it needs to wake up and
3367 if (input_available_clear_time
)
3368 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3371 /* On some systems, we must return right away.
3372 If any more processes want to signal us, we will
3374 Otherwise (on systems that have WNOHANG), loop around
3375 to use up all the processes that have something to tell us. */
3376 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT)
3378 signal (signo
, sigchld_handler
);
3382 #endif /* USG, but not HPUX with WNOHANG */
3388 exec_sentinel_unwind (data
)
3391 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
3396 exec_sentinel_error_handler (error
)
3399 cmd_error_internal (error
, "error in process sentinel: ");
3401 update_echo_area ();
3402 Fsleep_for (make_number (2), Qnil
);
3406 exec_sentinel (proc
, reason
)
3407 Lisp_Object proc
, reason
;
3409 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
3410 register struct Lisp_Process
*p
= XPROCESS (proc
);
3411 int count
= specpdl_ptr
- specpdl
;
3413 /* No need to gcpro these, because all we do with them later
3414 is test them for EQness, and none of them should be a string. */
3415 odeactivate
= Vdeactivate_mark
;
3416 XSETBUFFER (obuffer
, current_buffer
);
3417 okeymap
= current_buffer
->keymap
;
3419 sentinel
= p
->sentinel
;
3420 if (NILP (sentinel
))
3423 /* Zilch the sentinel while it's running, to avoid recursive invocations;
3424 assure that it gets restored no matter how the sentinel exits. */
3426 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
3427 /* Inhibit quit so that random quits don't screw up a running filter. */
3428 specbind (Qinhibit_quit
, Qt
);
3429 specbind (Qlast_nonmenu_event
, Qt
);
3431 running_asynch_code
= 1;
3432 internal_condition_case_1 (read_process_output_call
,
3434 Fcons (proc
, Fcons (reason
, Qnil
))),
3435 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
3436 exec_sentinel_error_handler
);
3437 running_asynch_code
= 0;
3438 restore_match_data ();
3440 Vdeactivate_mark
= odeactivate
;
3442 if (! EQ (Fcurrent_buffer (), obuffer
)
3443 || ! EQ (current_buffer
->keymap
, okeymap
))
3445 /* But do it only if the caller is actually going to read events.
3446 Otherwise there's no need to make him wake up, and it could
3447 cause trouble (for example it would make Fsit_for return). */
3448 if (waiting_for_user_input_p
== -1)
3449 record_asynch_buffer_change ();
3451 unbind_to (count
, Qnil
);
3454 /* Report all recent events of a change in process status
3455 (either run the sentinel or output a message).
3456 This is done while Emacs is waiting for keyboard input. */
3460 register Lisp_Object proc
, buffer
;
3461 Lisp_Object tail
, msg
;
3462 struct gcpro gcpro1
, gcpro2
;
3466 /* We need to gcpro tail; if read_process_output calls a filter
3467 which deletes a process and removes the cons to which tail points
3468 from Vprocess_alist, and then causes a GC, tail is an unprotected
3472 /* Set this now, so that if new processes are created by sentinels
3473 that we run, we get called again to handle their status changes. */
3474 update_tick
= process_tick
;
3476 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
3479 register struct Lisp_Process
*p
;
3481 proc
= Fcdr (Fcar (tail
));
3482 p
= XPROCESS (proc
);
3484 if (XINT (p
->tick
) != XINT (p
->update_tick
))
3486 XSETINT (p
->update_tick
, XINT (p
->tick
));
3488 /* If process is still active, read any output that remains. */
3489 if (XINT (p
->infd
) >= 0)
3490 while (! EQ (p
->filter
, Qt
)
3491 && read_process_output (proc
, XINT (p
->infd
)) > 0);
3495 /* Get the text to use for the message. */
3496 if (!NILP (p
->raw_status_low
))
3498 msg
= status_message (p
->status
);
3500 /* If process is terminated, deactivate it or delete it. */
3502 if (CONSP (p
->status
))
3503 symbol
= XCONS (p
->status
)->car
;
3505 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
3506 || EQ (symbol
, Qclosed
))
3508 if (delete_exited_processes
)
3509 remove_process (proc
);
3511 deactivate_process (proc
);
3514 /* Now output the message suitably. */
3515 if (!NILP (p
->sentinel
))
3516 exec_sentinel (proc
, msg
);
3517 /* Don't bother with a message in the buffer
3518 when a process becomes runnable. */
3519 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
3521 Lisp_Object ro
, tem
;
3522 struct buffer
*old
= current_buffer
;
3525 ro
= XBUFFER (buffer
)->read_only
;
3527 /* Avoid error if buffer is deleted
3528 (probably that's why the process is dead, too) */
3529 if (NILP (XBUFFER (buffer
)->name
))
3531 Fset_buffer (buffer
);
3533 /* Insert new output into buffer
3534 at the current end-of-output marker,
3535 thus preserving logical ordering of input and output. */
3536 if (XMARKER (p
->mark
)->buffer
)
3537 SET_PT (marker_position (p
->mark
));
3540 if (point
<= opoint
)
3541 opoint
+= XSTRING (msg
)->size
+ XSTRING (p
->name
)->size
+ 10;
3543 tem
= current_buffer
->read_only
;
3544 current_buffer
->read_only
= Qnil
;
3545 insert_string ("\nProcess ");
3546 Finsert (1, &p
->name
);
3547 insert_string (" ");
3549 current_buffer
->read_only
= tem
;
3550 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
3553 set_buffer_internal (old
);
3558 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
3559 redisplay_preserve_echo_area ();
3564 /* The first time this is called, assume keyboard input comes from DESC
3565 instead of from where we used to expect it.
3566 Subsequent calls mean assume input keyboard can come from DESC
3567 in addition to other places. */
3569 static int add_keyboard_wait_descriptor_called_flag
;
3572 add_keyboard_wait_descriptor (desc
)
3575 if (! add_keyboard_wait_descriptor_called_flag
)
3576 FD_CLR (0, &input_wait_mask
);
3577 add_keyboard_wait_descriptor_called_flag
= 1;
3578 FD_SET (desc
, &input_wait_mask
);
3579 if (desc
> max_keyboard_desc
)
3580 max_keyboard_desc
= desc
;
3583 /* From now on, do not expect DESC to give keyboard input. */
3586 delete_keyboard_wait_descriptor (desc
)
3590 int lim
= max_keyboard_desc
;
3592 FD_CLR (desc
, &input_wait_mask
);
3594 if (desc
== max_keyboard_desc
)
3595 for (fd
= 0; fd
< lim
; fd
++)
3596 if (FD_ISSET (fd
, &input_wait_mask
)
3597 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3598 max_keyboard_desc
= fd
;
3601 /* Return nonzero if *MASK has a bit set
3602 that corresponds to one of the keyboard input descriptors. */
3605 keyboard_bit_set (mask
)
3610 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
3611 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
3612 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3624 if (! noninteractive
|| initialized
)
3626 signal (SIGCHLD
, sigchld_handler
);
3629 FD_ZERO (&input_wait_mask
);
3630 FD_ZERO (&non_keyboard_wait_mask
);
3631 max_process_desc
= 0;
3633 FD_SET (0, &input_wait_mask
);
3635 Vprocess_alist
= Qnil
;
3636 for (i
= 0; i
< MAXDESC
; i
++)
3638 chan_process
[i
] = Qnil
;
3639 proc_buffered_char
[i
] = -1;
3646 stream_process
= intern ("stream");
3648 Qprocessp
= intern ("processp");
3649 staticpro (&Qprocessp
);
3650 Qrun
= intern ("run");
3652 Qstop
= intern ("stop");
3654 Qsignal
= intern ("signal");
3655 staticpro (&Qsignal
);
3657 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
3660 Qexit = intern ("exit");
3661 staticpro (&Qexit); */
3663 Qopen
= intern ("open");
3665 Qclosed
= intern ("closed");
3666 staticpro (&Qclosed
);
3668 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
3669 staticpro (&Qlast_nonmenu_event
);
3671 staticpro (&Vprocess_alist
);
3673 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
3674 "*Non-nil means delete processes immediately when they exit.\n\
3675 nil means don't delete them until `list-processes' is run.");
3677 delete_exited_processes
= 1;
3679 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
3680 "Control type of device used to communicate with subprocesses.\n\
3681 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
3682 The value has no effect if the system has no ptys or if all ptys are busy:\n\
3683 then a pipe is used in any case.\n\
3684 The value takes effect when `start-process' is called.");
3685 Vprocess_connection_type
= Qt
;
3687 defsubr (&Sprocessp
);
3688 defsubr (&Sget_process
);
3689 defsubr (&Sget_buffer_process
);
3690 defsubr (&Sdelete_process
);
3691 defsubr (&Sprocess_status
);
3692 defsubr (&Sprocess_exit_status
);
3693 defsubr (&Sprocess_id
);
3694 defsubr (&Sprocess_name
);
3695 defsubr (&Sprocess_tty_name
);
3696 defsubr (&Sprocess_command
);
3697 defsubr (&Sset_process_buffer
);
3698 defsubr (&Sprocess_buffer
);
3699 defsubr (&Sprocess_mark
);
3700 defsubr (&Sset_process_filter
);
3701 defsubr (&Sprocess_filter
);
3702 defsubr (&Sset_process_sentinel
);
3703 defsubr (&Sset_process_window_size
);
3704 defsubr (&Sprocess_sentinel
);
3705 defsubr (&Sprocess_kill_without_query
);
3706 defsubr (&Slist_processes
);
3707 defsubr (&Sprocess_list
);
3708 defsubr (&Sstart_process
);
3710 defsubr (&Sopen_network_stream
);
3711 #endif /* HAVE_SOCKETS */
3712 defsubr (&Saccept_process_output
);
3713 defsubr (&Sprocess_send_region
);
3714 defsubr (&Sprocess_send_string
);
3715 defsubr (&Sinterrupt_process
);
3716 defsubr (&Skill_process
);
3717 defsubr (&Squit_process
);
3718 defsubr (&Sstop_process
);
3719 defsubr (&Scontinue_process
);
3720 defsubr (&Sprocess_send_eof
);
3721 defsubr (&Ssignal_process
);
3722 defsubr (&Swaiting_for_user_input_p
);
3723 /* defsubr (&Sprocess_connection); */
3727 #else /* not subprocesses */
3729 #include <sys/types.h>
3733 #include "systime.h"
3734 #include "termopts.h"
3735 #include "sysselect.h"
3737 extern int frame_garbaged
;
3740 /* As described above, except assuming that there are no subprocesses:
3742 Wait for timeout to elapse and/or keyboard input to be available.
3745 timeout in seconds, or
3746 zero for no limit, or
3747 -1 means gobble data immediately available but don't wait for any.
3749 read_kbd is a Lisp_Object:
3750 0 to ignore keyboard input, or
3751 1 to return when input is available, or
3752 -1 means caller will actually read the input, so don't throw to
3754 We know that read_kbd will never be a Lisp_Process, since
3755 `subprocesses' isn't defined.
3757 do_display != 0 means redisplay should be done to show subprocess
3758 output that arrives.
3760 Return true iff we received input from any process. */
3763 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
3764 int time_limit
, microsecs
;
3765 Lisp_Object read_kbd
;
3768 EMACS_TIME end_time
, timeout
, *timeout_p
;
3771 /* What does time_limit really mean? */
3772 if (time_limit
|| microsecs
)
3774 /* It's not infinite. */
3775 timeout_p
= &timeout
;
3777 if (time_limit
== -1)
3778 /* In fact, it's zero. */
3779 EMACS_SET_SECS_USECS (timeout
, 0, 0);
3781 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
3783 /* How far in the future is that? */
3784 EMACS_GET_TIME (end_time
);
3785 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
3788 /* It's infinite. */
3791 /* Turn off periodic alarms (in case they are in use)
3792 because the select emulator uses alarms. */
3799 waitchannels
= XINT (read_kbd
) ? 1 : 0;
3801 /* If calling from keyboard input, do not quit
3802 since we want to return C-g as an input character.
3803 Otherwise, do pending quit if requested. */
3804 if (XINT (read_kbd
) >= 0)
3809 EMACS_GET_TIME (*timeout_p
);
3810 EMACS_SUB_TIME (*timeout_p
, end_time
, *timeout_p
);
3811 if (EMACS_TIME_NEG_P (*timeout_p
))
3815 /* Cause C-g and alarm signals to take immediate action,
3816 and cause input available signals to zero out timeout. */
3817 if (XINT (read_kbd
) < 0)
3818 set_waiting_for_input (&timeout
);
3820 /* If a frame has been newly mapped and needs updating,
3821 reprocess its display stuff. */
3822 if (frame_garbaged
&& do_display
)
3823 redisplay_preserve_echo_area ();
3825 if (XINT (read_kbd
) && detect_input_pending ())
3828 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
3831 /* Make C-g and alarm signals set flags again */
3832 clear_waiting_for_input ();
3834 /* If we woke up due to SIGWINCH, actually change size now. */
3835 do_pending_window_change ();
3839 /* If the system call was interrupted, then go around the
3845 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
3846 /* System sometimes fails to deliver SIGIO. */
3847 kill (getpid (), SIGIO
);
3850 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
3854 /* If we have timed out (nfds == 0) or found some input (nfds > 0),
3866 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
3867 /* Don't confuse make-docfile by having two doc strings for this function.
3868 make-docfile does not pay attention to #if, for good reason! */
3871 register Lisp_Object name
;
3876 /* Kill all processes associated with `buffer'.
3877 If `buffer' is nil, kill all processes.
3878 Since we have no subprocesses, this does nothing. */
3880 kill_buffer_processes (buffer
)
3891 defsubr (&Sget_buffer_process
);
3895 #endif /* not subprocesses */