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
;
1522 /* This runs in the Emacs process. */
1527 if (forkin
!= forkout
&& forkout
>= 0)
1532 /* vfork succeeded. */
1533 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
1536 register_child (pid
, inchannel
);
1537 #endif /* WINDOWSNT */
1539 /* If the subfork execv fails, and it exits,
1540 this close hangs. I don't know why.
1541 So have an interrupt jar it loose. */
1543 signal (SIGALRM
, create_process_1
);
1545 XPROCESS (process
)->subtty
= Qnil
;
1550 if (forkin
!= forkout
&& forkout
>= 0)
1555 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1558 XPROCESS (process
)->tty_name
= Qnil
;
1561 /* Restore the signal state whether vfork succeeded or not.
1562 (We will signal an error, below, if it failed.) */
1563 #ifdef POSIX_SIGNALS
1565 /* Restore the parent's signal handlers. */
1566 sigaction (SIGINT
, &sigint_action
, 0);
1567 sigaction (SIGQUIT
, &sigquit_action
, 0);
1569 sigaction (SIGHUP
, &sighup_action
, 0);
1571 #endif /* HAVE_VFORK */
1572 /* Stop blocking signals in the parent. */
1573 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1574 #else /* !POSIX_SIGNALS */
1578 #else /* not BSD4_1 */
1579 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1580 sigsetmask (SIGEMPTYMASK
);
1581 #else /* ordinary USG */
1583 signal (SIGCHLD
, sigchld
);
1584 /* Now really handle any of these signals
1585 that came in during this function. */
1586 if (sigchld_deferred
)
1587 kill (getpid (), SIGCHLD
);
1589 #endif /* ordinary USG */
1590 #endif /* not BSD4_1 */
1591 #endif /* SIGCHLD */
1592 #endif /* !POSIX_SIGNALS */
1594 /* Now generate the error if vfork failed. */
1596 report_file_error ("Doing vfork", Qnil
);
1598 #endif /* not VMS */
1602 /* open a TCP network connection to a given HOST/SERVICE. Treated
1603 exactly like a normal process when reading and writing. Only
1604 differences are in status display and process deletion. A network
1605 connection has no PID; you cannot signal it. All you can do is
1606 deactivate and close it via delete-process */
1608 DEFUN ("open-network-stream", Fopen_network_stream
, Sopen_network_stream
,
1610 "Open a TCP connection for a service to a host.\n\
1611 Returns a subprocess-object to represent the connection.\n\
1612 Input and output work as for subprocesses; `delete-process' closes it.\n\
1613 Args are NAME BUFFER HOST SERVICE.\n\
1614 NAME is name for process. It is modified if necessary to make it unique.\n\
1615 BUFFER is the buffer (or buffer-name) to associate with the process.\n\
1616 Process output goes at end of that buffer, unless you specify\n\
1617 an output stream or filter function to handle the output.\n\
1618 BUFFER may be also nil, meaning that this process is not associated\n\
1620 Third arg is name of the host to connect to, or its IP address.\n\
1621 Fourth arg SERVICE is name of the service desired, or an integer\n\
1622 specifying a port number to connect to.")
1623 (name
, buffer
, host
, service
)
1624 Lisp_Object name
, buffer
, host
, service
;
1628 struct sockaddr_in address
;
1629 struct servent
*svc_info
;
1630 struct hostent
*host_info_ptr
, host_info
;
1631 char *(addr_list
[2]);
1632 IN_ADDR numeric_addr
;
1636 struct hostent host_info_fixed
;
1637 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1639 int count
= specpdl_ptr
- specpdl
;
1641 GCPRO4 (name
, buffer
, host
, service
);
1642 CHECK_STRING (name
, 0);
1643 CHECK_STRING (host
, 0);
1644 if (INTEGERP (service
))
1645 port
= htons ((unsigned short) XINT (service
));
1648 CHECK_STRING (service
, 0);
1649 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
1651 error ("Unknown service \"%s\"", XSTRING (service
)->data
);
1652 port
= svc_info
->s_port
;
1655 /* Slow down polling to every ten seconds.
1656 Some kernels have a bug which causes retrying connect to fail
1657 after a connect. Polling can interfere with gethostbyname too. */
1658 #ifdef POLL_FOR_INPUT
1659 bind_polling_period (10);
1668 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
1670 if (! (host_info_ptr
== 0 && h_errno
== TRY_AGAIN
))
1673 Fsleep_for (make_number (1), Qnil
);
1675 if (host_info_ptr
== 0)
1676 /* Attempt to interpret host as numeric inet address */
1678 numeric_addr
= inet_addr ((char *) XSTRING (host
)->data
);
1679 if (NUMERIC_ADDR_ERROR
)
1680 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
1682 host_info_ptr
= &host_info
;
1683 host_info
.h_name
= 0;
1684 host_info
.h_aliases
= 0;
1685 host_info
.h_addrtype
= AF_INET
;
1687 /* Older machines have only one address slot called h_addr.
1688 Newer machines have h_addr_list, but #define h_addr to
1689 be its first element. */
1690 host_info
.h_addr_list
= &(addr_list
[0]);
1692 host_info
.h_addr
= (char*)(&numeric_addr
);
1694 host_info
.h_length
= strlen (addr_list
[0]);
1697 bzero (&address
, sizeof address
);
1698 bcopy (host_info_ptr
->h_addr
, (char *) &address
.sin_addr
,
1699 host_info_ptr
->h_length
);
1700 address
.sin_family
= host_info_ptr
->h_addrtype
;
1701 address
.sin_port
= port
;
1703 s
= socket (host_info_ptr
->h_addrtype
, SOCK_STREAM
, 0);
1705 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1707 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
1708 when connect is interrupted. So let's not let it get interrupted.
1709 Note we do not turn off polling, because polling is only used
1710 when not interrupt_input, and thus not normally used on the systems
1711 which have this bug. On systems which use polling, there's no way
1712 to quit if polling is turned off. */
1713 if (interrupt_input
)
1717 if (connect (s
, (struct sockaddr
*) &address
, sizeof address
) == -1
1718 && errno
!= EISCONN
)
1724 if (errno
== EADDRINUSE
&& retry
< 20)
1726 /* A delay here is needed on some FreeBSD systems,
1727 and it is harmless, since this retrying takes time anyway
1728 and should be infrequent. */
1729 Fsleep_for (make_number (1), Qnil
);
1736 if (interrupt_input
)
1740 report_file_error ("connection failed",
1741 Fcons (host
, Fcons (name
, Qnil
)));
1744 #ifdef POLL_FOR_INPUT
1745 unbind_to (count
, Qnil
);
1748 if (interrupt_input
)
1752 s
= connect_server (0);
1754 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1755 send_command (s
, C_PORT
, 0, "%s:%d", XSTRING (host
)->data
, ntohs (port
));
1756 send_command (s
, C_DUMB
, 1, 0);
1762 report_file_error ("error duplicating socket", Fcons (name
, Qnil
));
1765 buffer
= Fget_buffer_create (buffer
);
1766 proc
= make_process (name
);
1768 chan_process
[inch
] = proc
;
1771 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
1774 fcntl (inch
, F_SETFL
, O_NDELAY
);
1778 XPROCESS (proc
)->childp
= host
;
1779 XPROCESS (proc
)->command_channel_p
= Qnil
;
1780 XPROCESS (proc
)->buffer
= buffer
;
1781 XPROCESS (proc
)->sentinel
= Qnil
;
1782 XPROCESS (proc
)->filter
= Qnil
;
1783 XPROCESS (proc
)->command
= Qnil
;
1784 XPROCESS (proc
)->pid
= Qnil
;
1785 XSETINT (XPROCESS (proc
)->infd
, s
);
1786 XSETINT (XPROCESS (proc
)->outfd
, outch
);
1787 XPROCESS (proc
)->status
= Qrun
;
1788 FD_SET (inch
, &input_wait_mask
);
1789 FD_SET (inch
, &non_keyboard_wait_mask
);
1790 if (inch
> max_process_desc
)
1791 max_process_desc
= inch
;
1796 #endif /* HAVE_SOCKETS */
1798 deactivate_process (proc
)
1801 register int inchannel
, outchannel
;
1802 register struct Lisp_Process
*p
= XPROCESS (proc
);
1804 inchannel
= XINT (p
->infd
);
1805 outchannel
= XINT (p
->outfd
);
1809 /* Beware SIGCHLD hereabouts. */
1810 flush_pending_output (inchannel
);
1813 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
1814 sys$
dassgn (outchannel
);
1815 vs
= get_vms_process_pointer (p
->pid
);
1817 give_back_vms_process_stuff (vs
);
1821 if (outchannel
>= 0 && outchannel
!= inchannel
)
1825 XSETINT (p
->infd
, -1);
1826 XSETINT (p
->outfd
, -1);
1827 chan_process
[inchannel
] = Qnil
;
1828 FD_CLR (inchannel
, &input_wait_mask
);
1829 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
1830 if (inchannel
== max_process_desc
)
1833 /* We just closed the highest-numbered process input descriptor,
1834 so recompute the highest-numbered one now. */
1835 max_process_desc
= 0;
1836 for (i
= 0; i
< MAXDESC
; i
++)
1837 if (!NILP (chan_process
[i
]))
1838 max_process_desc
= i
;
1843 /* Close all descriptors currently in use for communication
1844 with subprocess. This is used in a newly-forked subprocess
1845 to get rid of irrelevant descriptors. */
1847 close_process_descs ()
1851 for (i
= 0; i
< MAXDESC
; i
++)
1853 Lisp_Object process
;
1854 process
= chan_process
[i
];
1855 if (!NILP (process
))
1857 int in
= XINT (XPROCESS (process
)->infd
);
1858 int out
= XINT (XPROCESS (process
)->outfd
);
1861 if (out
>= 0 && in
!= out
)
1868 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
1870 "Allow any pending output from subprocesses to be read by Emacs.\n\
1871 It is read into the process' buffers or given to their filter functions.\n\
1872 Non-nil arg PROCESS means do not return until some output has been received\n\
1874 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
1875 seconds and microseconds to wait; return after that much time whether\n\
1876 or not there is input.\n\
1877 Return non-nil iff we received any output before the timeout expired.")
1878 (process
, timeout
, timeout_msecs
)
1879 register Lisp_Object process
, timeout
, timeout_msecs
;
1884 if (! NILP (timeout_msecs
))
1886 CHECK_NUMBER (timeout_msecs
, 2);
1887 useconds
= XINT (timeout_msecs
);
1888 if (!INTEGERP (timeout
))
1889 XSETINT (timeout
, 0);
1892 int carry
= useconds
/ 1000000;
1894 XSETINT (timeout
, XINT (timeout
) + carry
);
1895 useconds
-= carry
* 1000000;
1897 /* I think this clause is necessary because C doesn't
1898 guarantee a particular rounding direction for negative
1902 XSETINT (timeout
, XINT (timeout
) - 1);
1903 useconds
+= 1000000;
1910 if (! NILP (timeout
))
1912 CHECK_NUMBER (timeout
, 1);
1913 seconds
= XINT (timeout
);
1926 XSETFASTINT (process
, 0);
1929 (wait_reading_process_input (seconds
, useconds
, process
, 0)
1933 /* This variable is different from waiting_for_input in keyboard.c.
1934 It is used to communicate to a lisp process-filter/sentinel (via the
1935 function Fwaiting_for_user_input_p below) whether emacs was waiting
1936 for user-input when that process-filter was called.
1937 waiting_for_input cannot be used as that is by definition 0 when
1938 lisp code is being evalled.
1939 This is also used in record_asynch_buffer_change.
1940 For that purpose, this must be 0
1941 when not inside wait_reading_process_input. */
1942 static int waiting_for_user_input_p
;
1944 /* Read and dispose of subprocess output while waiting for timeout to
1945 elapse and/or keyboard input to be available.
1948 timeout in seconds, or
1949 zero for no limit, or
1950 -1 means gobble data immediately available but don't wait for any.
1953 an additional duration to wait, measured in microseconds.
1954 If this is nonzero and time_limit is 0, then the timeout
1955 consists of MICROSECS only.
1957 READ_KBD is a lisp value:
1958 0 to ignore keyboard input, or
1959 1 to return when input is available, or
1960 -1 meaning caller will actually read the input, so don't throw to
1961 the quit handler, or
1962 a cons cell, meaning wait until its car is non-nil
1963 (and gobble terminal input into the buffer if any arrives), or
1964 a process object, meaning wait until something arrives from that
1965 process. The return value is true iff we read some input from
1968 DO_DISPLAY != 0 means redisplay should be done to show subprocess
1969 output that arrives.
1971 If READ_KBD is a pointer to a struct Lisp_Process, then the
1972 function returns true iff we received input from that process
1973 before the timeout elapsed.
1974 Otherwise, return true iff we received input from any process. */
1976 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
1977 int time_limit
, microsecs
;
1978 Lisp_Object read_kbd
;
1981 register int channel
, nfds
, m
;
1982 static SELECT_TYPE Available
;
1985 EMACS_TIME timeout
, end_time
, garbage
;
1987 int wait_channel
= -1;
1988 struct Lisp_Process
*wait_proc
= 0;
1989 int got_some_input
= 0;
1990 Lisp_Object
*wait_for_cell
= 0;
1992 FD_ZERO (&Available
);
1994 /* If read_kbd is a process to watch, set wait_proc and wait_channel
1996 if (PROCESSP (read_kbd
))
1998 wait_proc
= XPROCESS (read_kbd
);
1999 wait_channel
= XINT (wait_proc
->infd
);
2000 XSETFASTINT (read_kbd
, 0);
2003 /* If waiting for non-nil in a cell, record where. */
2004 if (CONSP (read_kbd
))
2006 wait_for_cell
= &XCONS (read_kbd
)->car
;
2007 XSETFASTINT (read_kbd
, 0);
2010 waiting_for_user_input_p
= XINT (read_kbd
);
2012 /* Since we may need to wait several times,
2013 compute the absolute time to return at. */
2014 if (time_limit
|| microsecs
)
2016 EMACS_GET_TIME (end_time
);
2017 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
2018 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
2023 /* If calling from keyboard input, do not quit
2024 since we want to return C-g as an input character.
2025 Otherwise, do pending quit if requested. */
2026 if (XINT (read_kbd
) >= 0)
2029 /* Exit now if the cell we're waiting for became non-nil. */
2030 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2033 /* Compute time from now till when time limit is up */
2034 /* Exit if already run out */
2035 if (time_limit
== -1)
2037 /* -1 specified for timeout means
2038 gobble output available now
2039 but don't wait at all. */
2041 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2043 else if (time_limit
|| microsecs
)
2045 EMACS_GET_TIME (timeout
);
2046 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
2047 if (EMACS_TIME_NEG_P (timeout
))
2052 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
2055 /* Cause C-g and alarm signals to take immediate action,
2056 and cause input available signals to zero out timeout.
2058 It is important that we do this before checking for process
2059 activity. If we get a SIGCHLD after the explicit checks for
2060 process activity, timeout is the only way we will know. */
2061 if (XINT (read_kbd
) < 0)
2062 set_waiting_for_input (&timeout
);
2064 /* If status of something has changed, and no input is
2065 available, notify the user of the change right away. After
2066 this explicit check, we'll let the SIGCHLD handler zap
2067 timeout to get our attention. */
2068 if (update_tick
!= process_tick
&& do_display
)
2070 Atemp
= input_wait_mask
;
2071 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2072 if ((select (MAXDESC
, &Atemp
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2076 /* It's okay for us to do this and then continue with
2077 the loop, since timeout has already been zeroed out. */
2078 clear_waiting_for_input ();
2083 /* Don't wait for output from a non-running process. */
2084 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
2085 update_status (wait_proc
);
2087 && ! EQ (wait_proc
->status
, Qrun
))
2089 clear_waiting_for_input ();
2093 /* Wait till there is something to do */
2095 if (! XINT (read_kbd
) && wait_for_cell
== 0)
2096 Available
= non_keyboard_wait_mask
;
2098 Available
= input_wait_mask
;
2100 /* If frame size has changed or the window is newly mapped,
2101 redisplay now, before we start to wait. There is a race
2102 condition here; if a SIGIO arrives between now and the select
2103 and indicates that a frame is trashed, the select may block
2104 displaying a trashed screen. */
2105 if (frame_garbaged
&& do_display
)
2107 clear_waiting_for_input ();
2108 redisplay_preserve_echo_area ();
2109 if (XINT (read_kbd
) < 0)
2110 set_waiting_for_input (&timeout
);
2113 if (XINT (read_kbd
) && detect_input_pending ())
2116 FD_ZERO (&Available
);
2119 nfds
= select (MAXDESC
, &Available
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2124 /* Make C-g and alarm signals set flags again */
2125 clear_waiting_for_input ();
2127 /* If we woke up due to SIGWINCH, actually change size now. */
2128 do_pending_window_change ();
2130 if (time_limit
&& nfds
== 0) /* timeout elapsed */
2134 if (xerrno
== EINTR
)
2135 FD_ZERO (&Available
);
2137 /* Ultrix select seems to return ENOMEM when it is
2138 interrupted. Treat it just like EINTR. Bleah. Note
2139 that we want to test for the "ultrix" CPP symbol, not
2140 "__ultrix__"; the latter is only defined under GCC, but
2141 not by DEC's bundled CC. -JimB */
2142 else if (xerrno
== ENOMEM
)
2143 FD_ZERO (&Available
);
2146 /* This happens for no known reason on ALLIANT.
2147 I am guessing that this is the right response. -- RMS. */
2148 else if (xerrno
== EFAULT
)
2149 FD_ZERO (&Available
);
2151 else if (xerrno
== EBADF
)
2154 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
2155 the child's closure of the pts gives the parent a SIGHUP, and
2156 the ptc file descriptor is automatically closed,
2157 yielding EBADF here or at select() call above.
2158 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
2159 in m/ibmrt-aix.h), and here we just ignore the select error.
2160 Cleanup occurs c/o status_notify after SIGCLD. */
2161 FD_ZERO (&Available
); /* Cannot depend on values returned */
2167 error("select error: %s", strerror (xerrno
));
2169 #if defined(sun) && !defined(USG5_4)
2170 else if (nfds
> 0 && keyboard_bit_set (&Available
)
2172 /* System sometimes fails to deliver SIGIO.
2174 David J. Mackenzie says that Emacs doesn't compile under
2175 Solaris if this code is enabled, thus the USG5_4 in the CPP
2176 conditional. "I haven't noticed any ill effects so far.
2177 If you find a Solaris expert somewhere, they might know
2179 kill (getpid (), SIGIO
);
2182 /* Check for keyboard input */
2183 /* If there is any, return immediately
2184 to give it higher priority than subprocesses */
2186 /* We used to do this if wait_for_cell,
2187 but that caused infinite recursion in selection request events. */
2188 if ((XINT (read_kbd
) || wait_for_cell
)
2189 && detect_input_pending ())
2192 if (detect_input_pending ())
2196 /* Exit now if the cell we're waiting for became non-nil. */
2197 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2201 /* If we think we have keyboard input waiting, but didn't get SIGIO
2202 go read it. This can happen with X on BSD after logging out.
2203 In that case, there really is no input and no SIGIO,
2204 but select says there is input. */
2206 if (XINT (read_kbd
) && interrupt_input
2207 && (keyboard_bit_set (&Available
)))
2212 got_some_input
|= nfds
> 0;
2214 /* If checking input just got us a size-change event from X,
2215 obey it now if we should. */
2216 if (XINT (read_kbd
) || wait_for_cell
)
2217 do_pending_window_change ();
2219 /* Check for data from a process. */
2220 /* Really FIRST_PROC_DESC should be 0 on Unix,
2221 but this is safer in the short run. */
2222 for (channel
= 0; channel
<= max_process_desc
; channel
++)
2224 if (FD_ISSET (channel
, &Available
)
2225 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
2229 /* If waiting for this channel, arrange to return as
2230 soon as no more input to be processed. No more
2232 if (wait_channel
== channel
)
2238 proc
= chan_process
[channel
];
2242 /* Read data from the process, starting with our
2243 buffered-ahead character if we have one. */
2245 nread
= read_process_output (proc
, channel
);
2248 /* Since read_process_output can run a filter,
2249 which can call accept-process-output,
2250 don't try to read from any other processes
2251 before doing the select again. */
2252 FD_ZERO (&Available
);
2255 redisplay_preserve_echo_area ();
2258 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2262 else if (nread
== -1 && errno
== EAGAIN
)
2266 else if (nread
== -1 && errno
== EAGAIN
)
2268 /* Note that we cannot distinguish between no input
2269 available now and a closed pipe.
2270 With luck, a closed pipe will be accompanied by
2271 subprocess termination and SIGCHLD. */
2272 else if (nread
== 0 && !NETCONN_P (proc
))
2274 #endif /* O_NDELAY */
2275 #endif /* O_NONBLOCK */
2276 #endif /* EWOULDBLOCK */
2278 /* On some OSs with ptys, when the process on one end of
2279 a pty exits, the other end gets an error reading with
2280 errno = EIO instead of getting an EOF (0 bytes read).
2281 Therefore, if we get an error reading and errno =
2282 EIO, just continue, because the child process has
2283 exited and should clean itself up soon (e.g. when we
2285 else if (nread
== -1 && errno
== EIO
)
2287 #endif /* HAVE_PTYS */
2288 /* If we can detect process termination, don't consider the process
2289 gone just because its pipe is closed. */
2291 else if (nread
== 0 && !NETCONN_P (proc
))
2296 /* Preserve status of processes already terminated. */
2297 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2298 deactivate_process (proc
);
2299 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2300 update_status (XPROCESS (proc
));
2301 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2302 XPROCESS (proc
)->status
2303 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2306 } /* end for each file descriptor */
2307 } /* end while exit conditions not met */
2309 waiting_for_user_input_p
= 0;
2311 /* If calling from keyboard input, do not quit
2312 since we want to return C-g as an input character.
2313 Otherwise, do pending quit if requested. */
2314 if (XINT (read_kbd
) >= 0)
2316 /* Prevent input_pending from remaining set if we quit. */
2317 clear_input_pending ();
2321 return got_some_input
;
2324 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
2327 read_process_output_call (fun_and_args
)
2328 Lisp_Object fun_and_args
;
2330 return apply1 (XCONS (fun_and_args
)->car
, XCONS (fun_and_args
)->cdr
);
2334 read_process_output_error_handler (error
)
2337 cmd_error_internal (error
, "error in process filter: ");
2339 update_echo_area ();
2340 Fsleep_for (make_number (2), Qnil
);
2343 /* Read pending output from the process channel,
2344 starting with our buffered-ahead character if we have one.
2345 Yield number of characters read.
2347 This function reads at most 1024 characters.
2348 If you want to read all available subprocess output,
2349 you must call it repeatedly until it returns zero. */
2351 read_process_output (proc
, channel
)
2353 register int channel
;
2355 register int nchars
;
2361 register Lisp_Object outstream
;
2362 register struct buffer
*old
= current_buffer
;
2363 register struct Lisp_Process
*p
= XPROCESS (proc
);
2364 register int opoint
;
2367 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2369 vs
= get_vms_process_pointer (p
->pid
);
2373 return(0); /* Really weird if it does this */
2374 if (!(vs
->iosb
[0] & 1))
2375 return -1; /* I/O error */
2378 error ("Could not get VMS process pointer");
2379 chars
= vs
->inputBuffer
;
2380 nchars
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2383 start_vms_process_read (vs
); /* Crank up the next read on the process */
2384 return 1; /* Nothing worth printing, say we got 1 */
2388 if (proc_buffered_char
[channel
] < 0)
2390 nchars
= read_child_output (channel
, chars
, sizeof (chars
));
2392 nchars
= read (channel
, chars
, sizeof chars
);
2396 chars
[0] = proc_buffered_char
[channel
];
2397 proc_buffered_char
[channel
] = -1;
2399 nchars
= read_child_output (channel
, chars
+ 1, sizeof (chars
) - 1);
2401 nchars
= read (channel
, chars
+ 1, sizeof chars
- 1);
2406 nchars
= nchars
+ 1;
2408 #endif /* not VMS */
2410 if (nchars
<= 0) return nchars
;
2412 outstream
= p
->filter
;
2413 if (!NILP (outstream
))
2415 /* We inhibit quit here instead of just catching it so that
2416 hitting ^G when a filter happens to be running won't screw
2418 int count
= specpdl_ptr
- specpdl
;
2419 Lisp_Object odeactivate
;
2420 Lisp_Object obuffer
, okeymap
;
2422 /* No need to gcpro these, because all we do with them later
2423 is test them for EQness, and none of them should be a string. */
2424 odeactivate
= Vdeactivate_mark
;
2425 XSETBUFFER (obuffer
, current_buffer
);
2426 okeymap
= current_buffer
->keymap
;
2428 specbind (Qinhibit_quit
, Qt
);
2429 specbind (Qlast_nonmenu_event
, Qt
);
2431 running_asynch_code
= 1;
2432 internal_condition_case_1 (read_process_output_call
,
2435 Fcons (make_string (chars
,
2438 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
2439 read_process_output_error_handler
);
2440 running_asynch_code
= 0;
2441 restore_match_data ();
2443 /* Handling the process output should not deactivate the mark. */
2444 Vdeactivate_mark
= odeactivate
;
2446 #if 0 /* Call record_asynch_buffer_change unconditionally,
2447 because we might have changed minor modes or other things
2448 that affect key bindings. */
2449 if (! EQ (Fcurrent_buffer (), obuffer
)
2450 || ! EQ (current_buffer
->keymap
, okeymap
))
2452 /* But do it only if the caller is actually going to read events.
2453 Otherwise there's no need to make him wake up, and it could
2454 cause trouble (for example it would make Fsit_for return). */
2455 if (waiting_for_user_input_p
== -1)
2456 record_asynch_buffer_change ();
2459 start_vms_process_read (vs
);
2461 unbind_to (count
, Qnil
);
2465 /* If no filter, write into buffer if it isn't dead. */
2466 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2468 Lisp_Object old_read_only
;
2469 Lisp_Object old_begv
, old_zv
;
2470 Lisp_Object odeactivate
;
2472 odeactivate
= Vdeactivate_mark
;
2474 Fset_buffer (p
->buffer
);
2476 old_read_only
= current_buffer
->read_only
;
2477 XSETFASTINT (old_begv
, BEGV
);
2478 XSETFASTINT (old_zv
, ZV
);
2480 current_buffer
->read_only
= Qnil
;
2482 /* Insert new output into buffer
2483 at the current end-of-output marker,
2484 thus preserving logical ordering of input and output. */
2485 if (XMARKER (p
->mark
)->buffer
)
2486 SET_PT (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
));
2490 /* If the output marker is outside of the visible region, save
2491 the restriction and widen. */
2492 if (! (BEGV
<= point
&& point
<= ZV
))
2495 /* Make sure opoint floats ahead of any new text, just as point
2497 if (point
<= opoint
)
2500 /* Insert after old_begv, but before old_zv. */
2501 if (point
< XFASTINT (old_begv
))
2502 XSETFASTINT (old_begv
, XFASTINT (old_begv
) + nchars
);
2503 if (point
<= XFASTINT (old_zv
))
2504 XSETFASTINT (old_zv
, XFASTINT (old_zv
) + nchars
);
2506 /* Insert before markers in case we are inserting where
2507 the buffer's mark is, and the user's next command is Meta-y. */
2508 insert_before_markers (chars
, nchars
);
2509 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
2511 update_mode_lines
++;
2513 /* If the restriction isn't what it should be, set it. */
2514 if (XFASTINT (old_begv
) != BEGV
|| XFASTINT (old_zv
) != ZV
)
2515 Fnarrow_to_region (old_begv
, old_zv
);
2517 /* Handling the process output should not deactivate the mark. */
2518 Vdeactivate_mark
= odeactivate
;
2520 current_buffer
->read_only
= old_read_only
;
2522 set_buffer_internal (old
);
2525 start_vms_process_read (vs
);
2530 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
2532 "Returns non-nil if emacs is waiting for input from the user.\n\
2533 This is intended for use by asynchronous process output filters and sentinels.")
2536 return (waiting_for_user_input_p
? Qt
: Qnil
);
2539 /* Sending data to subprocess */
2541 jmp_buf send_process_frame
;
2544 send_process_trap ()
2550 longjmp (send_process_frame
, 1);
2553 /* Send some data to process PROC.
2554 BUF is the beginning of the data; LEN is the number of characters.
2555 OBJECT is the Lisp object that the data comes from. */
2557 send_process (proc
, buf
, len
, object
)
2558 volatile Lisp_Object proc
;
2563 /* Use volatile to protect variables from being clobbered by longjmp. */
2565 volatile unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
2568 struct Lisp_Process
*p
= XPROCESS (proc
);
2569 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2572 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2573 update_status (XPROCESS (proc
));
2574 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2575 error ("Process %s not running", procname
);
2578 vs
= get_vms_process_pointer (p
->pid
);
2580 error ("Could not find this process: %x", p
->pid
);
2581 else if (write_to_vms_process (vs
, buf
, len
))
2585 if (pty_max_bytes
== 0)
2587 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
2588 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
2590 if (pty_max_bytes
< 0)
2591 pty_max_bytes
= 250;
2593 pty_max_bytes
= 250;
2595 /* Deduct one, to leave space for the eof. */
2599 if (!setjmp (send_process_frame
))
2603 SIGTYPE (*old_sigpipe
)();
2606 /* Decide how much data we can send in one batch.
2607 Long lines need to be split into multiple batches. */
2608 if (!NILP (XPROCESS (proc
)->pty_flag
))
2610 /* Starting this at zero is always correct when not the first iteration
2611 because the previous iteration ended by sending C-d.
2612 It may not be correct for the first iteration
2613 if a partial line was sent in a separate send_process call.
2614 If that proves worth handling, we need to save linepos
2615 in the process object. */
2618 char *end
= buf
+ len
;
2620 /* Scan through this text for a line that is too long. */
2621 while (ptr
!= end
&& linepos
< pty_max_bytes
)
2629 /* If we found one, break the line there
2630 and put in a C-d to force the buffer through. */
2634 /* Send this batch, using one or more write calls. */
2637 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
2638 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
2639 signal (SIGPIPE
, old_sigpipe
);
2645 || errno
== EWOULDBLOCK
2651 /* Buffer is full. Wait, accepting input;
2652 that may allow the program
2653 to finish doing output and read more. */
2658 /* Running filters might relocate buffers or strings.
2659 Arrange to relocate BUF. */
2660 if (BUFFERP (object
))
2661 offset
= BUF_PTR_CHAR_POS (XBUFFER (object
),
2662 (unsigned char *) buf
);
2663 else if (STRINGP (object
))
2664 offset
= buf
- (char *) XSTRING (object
)->data
;
2666 XSETFASTINT (zero
, 0);
2667 wait_reading_process_input (1, 0, zero
, 0);
2669 if (BUFFERP (object
))
2670 buf
= (char *) BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
2671 else if (STRINGP (object
))
2672 buf
= offset
+ (char *) XSTRING (object
)->data
;
2677 /* This is a real error. */
2678 report_file_error ("writing to process", Fcons (proc
, Qnil
));
2685 /* If we sent just part of the string, put in an EOF
2686 to force it through, before we send the rest. */
2688 Fprocess_send_eof (proc
);
2693 XPROCESS (proc
)->raw_status_low
= Qnil
;
2694 XPROCESS (proc
)->raw_status_high
= Qnil
;
2695 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2696 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2697 deactivate_process (proc
);
2699 error ("Error writing to process %s; closed it", procname
);
2701 error ("SIGPIPE raised on process %s; closed it", procname
);
2706 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
2708 "Send current contents of region as input to PROCESS.\n\
2709 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2710 nil, indicating the current buffer's process.\n\
2711 Called from program, takes three arguments, PROCESS, START and END.\n\
2712 If the region is more than 500 characters long,\n\
2713 it is sent in several bunches. This may happen even for shorter regions.\n\
2714 Output from processes can arrive in between bunches.")
2715 (process
, start
, end
)
2716 Lisp_Object process
, start
, end
;
2721 proc
= get_process (process
);
2722 validate_region (&start
, &end
);
2724 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
2727 start1
= XINT (start
);
2728 send_process (proc
, &FETCH_CHAR (start1
), XINT (end
) - XINT (start
),
2729 Fcurrent_buffer ());
2734 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
2736 "Send PROCESS the contents of STRING as input.\n\
2737 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2738 nil, indicating the current buffer's process.\n\
2739 If STRING is more than 500 characters long,\n\
2740 it is sent in several bunches. This may happen even for shorter strings.\n\
2741 Output from processes can arrive in between bunches.")
2743 Lisp_Object process
, string
;
2746 CHECK_STRING (string
, 1);
2747 proc
= get_process (process
);
2748 send_process (proc
, XSTRING (string
)->data
, XSTRING (string
)->size
, string
);
2752 /* send a signal number SIGNO to PROCESS.
2753 CURRENT_GROUP means send to the process group that currently owns
2754 the terminal being used to communicate with PROCESS.
2755 This is used for various commands in shell mode.
2756 If NOMSG is zero, insert signal-announcements into process's buffers
2759 If we can, we try to signal PROCESS by sending control characters
2760 down the pty. This allows us to signal inferiors who have changed
2761 their uid, for which killpg would return an EPERM error. */
2764 process_send_signal (process
, signo
, current_group
, nomsg
)
2765 Lisp_Object process
;
2767 Lisp_Object current_group
;
2771 register struct Lisp_Process
*p
;
2775 proc
= get_process (process
);
2776 p
= XPROCESS (proc
);
2778 if (!EQ (p
->childp
, Qt
))
2779 error ("Process %s is not a subprocess",
2780 XSTRING (p
->name
)->data
);
2781 if (XINT (p
->infd
) < 0)
2782 error ("Process %s is not active",
2783 XSTRING (p
->name
)->data
);
2785 if (NILP (p
->pty_flag
))
2786 current_group
= Qnil
;
2788 /* If we are using pgrps, get a pgrp number and make it negative. */
2789 if (!NILP (current_group
))
2791 #ifdef SIGNALS_VIA_CHARACTERS
2792 /* If possible, send signals to the entire pgrp
2793 by sending an input character to it. */
2795 /* TERMIOS is the latest and bestest, and seems most likely to
2796 work. If the system has it, use it. */
2803 tcgetattr (XINT (p
->infd
), &t
);
2804 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2808 tcgetattr (XINT (p
->infd
), &t
);
2809 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2813 tcgetattr (XINT (p
->infd
), &t
);
2814 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
2815 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2817 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
2822 #else /* ! HAVE_TERMIOS */
2824 /* On Berkeley descendants, the following IOCTL's retrieve the
2825 current control characters. */
2826 #if defined (TIOCGLTC) && defined (TIOCGETC)
2834 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2835 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
2838 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2839 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
2843 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
2844 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
2846 #endif /* ! defined (SIGTSTP) */
2849 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2851 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
2858 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2859 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2862 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2863 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2867 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2868 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2870 #endif /* ! defined (SIGTSTP) */
2872 #else /* ! defined (TCGETA) */
2873 Your configuration files are messed up
.
2874 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
2875 you'd better be using one of the alternatives above! */
2876 #endif /* ! defined (TCGETA) */
2877 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2878 #endif /* ! defined HAVE_TERMIOS */
2879 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
2882 /* Get the pgrp using the tty itself, if we have that.
2883 Otherwise, use the pty to get the pgrp.
2884 On pfa systems, saka@pfu.fujitsu.co.JP writes:
2885 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
2886 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
2887 His patch indicates that if TIOCGPGRP returns an error, then
2888 we should just assume that p->pid is also the process group id. */
2892 if (!NILP (p
->subtty
))
2893 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
2895 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
2899 gid
= - XFASTINT (p
->pid
);
2900 #endif /* ! defined (pfa) */
2906 #else /* ! defined (TIOCGPGRP ) */
2907 /* Can't select pgrps on this system, so we know that
2908 the child itself heads the pgrp. */
2909 gid
= - XFASTINT (p
->pid
);
2910 #endif /* ! defined (TIOCGPGRP ) */
2913 gid
= - XFASTINT (p
->pid
);
2919 p
->raw_status_low
= Qnil
;
2920 p
->raw_status_high
= Qnil
;
2922 XSETINT (p
->tick
, ++process_tick
);
2926 #endif /* ! defined (SIGCONT) */
2929 send_process (proc
, "\003", 1, Qnil
); /* ^C */
2934 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
2939 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
2942 flush_pending_output (XINT (p
->infd
));
2946 /* If we don't have process groups, send the signal to the immediate
2947 subprocess. That isn't really right, but it's better than any
2948 obvious alternative. */
2951 kill (XFASTINT (p
->pid
), signo
);
2955 /* gid may be a pid, or minus a pgrp's number */
2957 if (!NILP (current_group
))
2958 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
2961 gid
= - XFASTINT (p
->pid
);
2964 #else /* ! defined (TIOCSIGSEND) */
2965 EMACS_KILLPG (-gid
, signo
);
2966 #endif /* ! defined (TIOCSIGSEND) */
2969 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
2970 "Interrupt process PROCESS. May be process or name of one.\n\
2971 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
2972 nil or no arg means current buffer's process.\n\
2973 Second arg CURRENT-GROUP non-nil means send signal to\n\
2974 the current process-group of the process's controlling terminal\n\
2975 rather than to the process's own process group.\n\
2976 If the process is a shell, this means interrupt current subjob\n\
2977 rather than the shell.")
2978 (process
, current_group
)
2979 Lisp_Object process
, current_group
;
2981 process_send_signal (process
, SIGINT
, current_group
, 0);
2985 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
2986 "Kill process PROCESS. May be process or name of one.\n\
2987 See function `interrupt-process' for more details on usage.")
2988 (process
, current_group
)
2989 Lisp_Object process
, current_group
;
2991 process_send_signal (process
, SIGKILL
, current_group
, 0);
2995 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
2996 "Send QUIT signal to process PROCESS. May be process or name of one.\n\
2997 See function `interrupt-process' for more details on usage.")
2998 (process
, current_group
)
2999 Lisp_Object process
, current_group
;
3001 process_send_signal (process
, SIGQUIT
, current_group
, 0);
3005 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
3006 "Stop process PROCESS. May be process or name of one.\n\
3007 See function `interrupt-process' for more details on usage.")
3008 (process
, current_group
)
3009 Lisp_Object process
, current_group
;
3012 error ("no SIGTSTP support");
3014 process_send_signal (process
, SIGTSTP
, current_group
, 0);
3019 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
3020 "Continue process PROCESS. May be process or name of one.\n\
3021 See function `interrupt-process' for more details on usage.")
3022 (process
, current_group
)
3023 Lisp_Object process
, current_group
;
3026 process_send_signal (process
, SIGCONT
, current_group
, 0);
3028 error ("no SIGCONT support");
3033 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
3034 2, 2, "nProcess number: \nnSignal code: ",
3035 "Send the process with process id PID the signal with code SIGCODE.\n\
3036 PID must be an integer. The process need not be a child of this Emacs.\n\
3037 SIGCODE may be an integer, or a symbol whose name is a signal name.")
3039 Lisp_Object pid
, sigcode
;
3041 CHECK_NUMBER (pid
, 0);
3043 #define handle_signal(NAME, VALUE) \
3044 else if (!strcmp (name, NAME)) \
3045 XSETINT (sigcode, VALUE)
3047 if (INTEGERP (sigcode
))
3051 unsigned char *name
;
3053 CHECK_SYMBOL (sigcode
, 1);
3054 name
= XSYMBOL (sigcode
)->name
->data
;
3059 handle_signal ("SIGHUP", SIGHUP
);
3062 handle_signal ("SIGINT", SIGINT
);
3065 handle_signal ("SIGQUIT", SIGQUIT
);
3068 handle_signal ("SIGILL", SIGILL
);
3071 handle_signal ("SIGABRT", SIGABRT
);
3074 handle_signal ("SIGEMT", SIGEMT
);
3077 handle_signal ("SIGKILL", SIGKILL
);
3080 handle_signal ("SIGFPE", SIGFPE
);
3083 handle_signal ("SIGBUS", SIGBUS
);
3086 handle_signal ("SIGSEGV", SIGSEGV
);
3089 handle_signal ("SIGSYS", SIGSYS
);
3092 handle_signal ("SIGPIPE", SIGPIPE
);
3095 handle_signal ("SIGALRM", SIGALRM
);
3098 handle_signal ("SIGTERM", SIGTERM
);
3101 handle_signal ("SIGURG", SIGURG
);
3104 handle_signal ("SIGSTOP", SIGSTOP
);
3107 handle_signal ("SIGTSTP", SIGTSTP
);
3110 handle_signal ("SIGCONT", SIGCONT
);
3113 handle_signal ("SIGCHLD", SIGCHLD
);
3116 handle_signal ("SIGTTIN", SIGTTIN
);
3119 handle_signal ("SIGTTOU", SIGTTOU
);
3122 handle_signal ("SIGIO", SIGIO
);
3125 handle_signal ("SIGXCPU", SIGXCPU
);
3128 handle_signal ("SIGXFSZ", SIGXFSZ
);
3131 handle_signal ("SIGVTALRM", SIGVTALRM
);
3134 handle_signal ("SIGPROF", SIGPROF
);
3137 handle_signal ("SIGWINCH", SIGWINCH
);
3140 handle_signal ("SIGINFO", SIGINFO
);
3143 handle_signal ("SIGUSR1", SIGUSR1
);
3146 handle_signal ("SIGUSR2", SIGUSR2
);
3149 error ("Undefined signal name %s", name
);
3152 #undef handle_signal
3155 /* Only works for kill-type signals */
3156 return make_number (win32_kill_process (XINT (pid
), XINT (sigcode
)));
3158 return make_number (kill (XINT (pid
), XINT (sigcode
)));
3162 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
3163 "Make PROCESS see end-of-file in its input.\n\
3164 Eof comes after any text already sent to it.\n\
3165 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3166 nil, indicating the current buffer's process.\n\
3167 If PROCESS is a network connection, or is a process communicating\n\
3168 through a pipe (as opposed to a pty), then you cannot send any more\n\
3169 text to PROCESS after you call this function.")
3171 Lisp_Object process
;
3175 proc
= get_process (process
);
3177 /* Make sure the process is really alive. */
3178 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3179 update_status (XPROCESS (proc
));
3180 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3181 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
3184 send_process (proc
, "\032", 1, Qnil
); /* ^z */
3186 if (!NILP (XPROCESS (proc
)->pty_flag
))
3187 send_process (proc
, "\004", 1, Qnil
);
3190 close (XINT (XPROCESS (proc
)->outfd
));
3191 XSETINT (XPROCESS (proc
)->outfd
, open (NULL_DEVICE
, O_WRONLY
));
3197 /* Kill all processes associated with `buffer'.
3198 If `buffer' is nil, kill all processes */
3200 kill_buffer_processes (buffer
)
3203 Lisp_Object tail
, proc
;
3205 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3207 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3208 if (GC_PROCESSP (proc
)
3209 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
3211 if (NETCONN_P (proc
))
3212 Fdelete_process (proc
);
3213 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
3214 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
3219 /* On receipt of a signal that a child status has changed,
3220 loop asking about children with changed statuses until
3221 the system says there are no more.
3222 All we do is change the status;
3223 we do not run sentinels or print notifications.
3224 That is saved for the next time keyboard input is done,
3225 in order to avoid timing errors. */
3227 /** WARNING: this can be called during garbage collection.
3228 Therefore, it must not be fooled by the presence of mark bits in
3231 /** USG WARNING: Although it is not obvious from the documentation
3232 in signal(2), on a USG system the SIGCLD handler MUST NOT call
3233 signal() before executing at least one wait(), otherwise the handler
3234 will be called again, resulting in an infinite loop. The relevant
3235 portion of the documentation reads "SIGCLD signals will be queued
3236 and the signal-catching function will be continually reentered until
3237 the queue is empty". Invoking signal() causes the kernel to reexamine
3238 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
3241 sigchld_handler (signo
)
3244 int old_errno
= errno
;
3246 register struct Lisp_Process
*p
;
3247 extern EMACS_TIME
*input_available_clear_time
;
3251 sigheld
|= sigbit (SIGCHLD
);
3263 #endif /* no WUNTRACED */
3264 /* Keep trying to get a status until we get a definitive result. */
3268 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
3270 while (pid
<= 0 && errno
== EINTR
);
3274 /* A real failure. We have done all our job, so return. */
3276 /* USG systems forget handlers when they are used;
3277 must reestablish each time */
3279 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
3282 sigheld
&= ~sigbit (SIGCHLD
);
3290 #endif /* no WNOHANG */
3292 /* Find the process that signaled us, and record its status. */
3295 for (tail
= Vprocess_alist
; XSYMBOL (tail
) != XSYMBOL (Qnil
); tail
= XCONS (tail
)->cdr
)
3297 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3298 p
= XPROCESS (proc
);
3299 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
3304 /* Look for an asynchronous process whose pid hasn't been filled
3307 for (tail
= Vprocess_alist
; XSYMBOL (tail
) != XSYMBOL (Qnil
); tail
= XCONS (tail
)->cdr
)
3309 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3310 p
= XPROCESS (proc
);
3311 if (INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
3316 /* Change the status of the process that was found. */
3319 union { int i
; WAITTYPE wt
; } u
;
3320 int clear_desc_flag
= 0;
3322 XSETINT (p
->tick
, ++process_tick
);
3324 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
3325 XSETINT (p
->raw_status_high
, u
.i
>> 16);
3327 /* If process has terminated, stop waiting for its output. */
3328 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
3329 && XINT (p
->infd
) >= 0)
3330 clear_desc_flag
= 1;
3332 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
3333 if (clear_desc_flag
)
3335 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
3336 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
3339 /* Tell wait_reading_process_input that it needs to wake up and
3341 if (input_available_clear_time
)
3342 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3345 /* There was no asynchronous process found for that id. Check
3346 if we have a synchronous process. */
3349 synch_process_alive
= 0;
3351 /* Report the status of the synchronous process. */
3353 synch_process_retcode
= WRETCODE (w
);
3354 else if (WIFSIGNALED (w
))
3356 int code
= WTERMSIG (w
);
3362 /* Suppress warning if the table has const char *. */
3363 signame
= (char *) sys_siglist
[code
];
3365 signame
= sys_errlist
[code
];
3369 signame
= "unknown";
3371 synch_process_death
= signame
;
3374 /* Tell wait_reading_process_input that it needs to wake up and
3376 if (input_available_clear_time
)
3377 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3380 /* On some systems, we must return right away.
3381 If any more processes want to signal us, we will
3383 Otherwise (on systems that have WNOHANG), loop around
3384 to use up all the processes that have something to tell us. */
3385 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT)
3387 signal (signo
, sigchld_handler
);
3391 #endif /* USG, but not HPUX with WNOHANG */
3397 exec_sentinel_unwind (data
)
3400 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
3405 exec_sentinel_error_handler (error
)
3408 cmd_error_internal (error
, "error in process sentinel: ");
3410 update_echo_area ();
3411 Fsleep_for (make_number (2), Qnil
);
3415 exec_sentinel (proc
, reason
)
3416 Lisp_Object proc
, reason
;
3418 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
3419 register struct Lisp_Process
*p
= XPROCESS (proc
);
3420 int count
= specpdl_ptr
- specpdl
;
3422 /* No need to gcpro these, because all we do with them later
3423 is test them for EQness, and none of them should be a string. */
3424 odeactivate
= Vdeactivate_mark
;
3425 XSETBUFFER (obuffer
, current_buffer
);
3426 okeymap
= current_buffer
->keymap
;
3428 sentinel
= p
->sentinel
;
3429 if (NILP (sentinel
))
3432 /* Zilch the sentinel while it's running, to avoid recursive invocations;
3433 assure that it gets restored no matter how the sentinel exits. */
3435 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
3436 /* Inhibit quit so that random quits don't screw up a running filter. */
3437 specbind (Qinhibit_quit
, Qt
);
3438 specbind (Qlast_nonmenu_event
, Qt
);
3440 running_asynch_code
= 1;
3441 internal_condition_case_1 (read_process_output_call
,
3443 Fcons (proc
, Fcons (reason
, Qnil
))),
3444 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
3445 exec_sentinel_error_handler
);
3446 running_asynch_code
= 0;
3447 restore_match_data ();
3449 Vdeactivate_mark
= odeactivate
;
3451 if (! EQ (Fcurrent_buffer (), obuffer
)
3452 || ! EQ (current_buffer
->keymap
, okeymap
))
3454 /* But do it only if the caller is actually going to read events.
3455 Otherwise there's no need to make him wake up, and it could
3456 cause trouble (for example it would make Fsit_for return). */
3457 if (waiting_for_user_input_p
== -1)
3458 record_asynch_buffer_change ();
3460 unbind_to (count
, Qnil
);
3463 /* Report all recent events of a change in process status
3464 (either run the sentinel or output a message).
3465 This is done while Emacs is waiting for keyboard input. */
3469 register Lisp_Object proc
, buffer
;
3470 Lisp_Object tail
, msg
;
3471 struct gcpro gcpro1
, gcpro2
;
3475 /* We need to gcpro tail; if read_process_output calls a filter
3476 which deletes a process and removes the cons to which tail points
3477 from Vprocess_alist, and then causes a GC, tail is an unprotected
3481 /* Set this now, so that if new processes are created by sentinels
3482 that we run, we get called again to handle their status changes. */
3483 update_tick
= process_tick
;
3485 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
3488 register struct Lisp_Process
*p
;
3490 proc
= Fcdr (Fcar (tail
));
3491 p
= XPROCESS (proc
);
3493 if (XINT (p
->tick
) != XINT (p
->update_tick
))
3495 XSETINT (p
->update_tick
, XINT (p
->tick
));
3497 /* If process is still active, read any output that remains. */
3498 if (XINT (p
->infd
) >= 0)
3499 while (! EQ (p
->filter
, Qt
)
3500 && read_process_output (proc
, XINT (p
->infd
)) > 0);
3504 /* Get the text to use for the message. */
3505 if (!NILP (p
->raw_status_low
))
3507 msg
= status_message (p
->status
);
3509 /* If process is terminated, deactivate it or delete it. */
3511 if (CONSP (p
->status
))
3512 symbol
= XCONS (p
->status
)->car
;
3514 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
3515 || EQ (symbol
, Qclosed
))
3517 if (delete_exited_processes
)
3518 remove_process (proc
);
3520 deactivate_process (proc
);
3523 /* Now output the message suitably. */
3524 if (!NILP (p
->sentinel
))
3525 exec_sentinel (proc
, msg
);
3526 /* Don't bother with a message in the buffer
3527 when a process becomes runnable. */
3528 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
3530 Lisp_Object ro
, tem
;
3531 struct buffer
*old
= current_buffer
;
3534 ro
= XBUFFER (buffer
)->read_only
;
3536 /* Avoid error if buffer is deleted
3537 (probably that's why the process is dead, too) */
3538 if (NILP (XBUFFER (buffer
)->name
))
3540 Fset_buffer (buffer
);
3542 /* Insert new output into buffer
3543 at the current end-of-output marker,
3544 thus preserving logical ordering of input and output. */
3545 if (XMARKER (p
->mark
)->buffer
)
3546 SET_PT (marker_position (p
->mark
));
3549 if (point
<= opoint
)
3550 opoint
+= XSTRING (msg
)->size
+ XSTRING (p
->name
)->size
+ 10;
3552 tem
= current_buffer
->read_only
;
3553 current_buffer
->read_only
= Qnil
;
3554 insert_string ("\nProcess ");
3555 Finsert (1, &p
->name
);
3556 insert_string (" ");
3558 current_buffer
->read_only
= tem
;
3559 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
3562 set_buffer_internal (old
);
3567 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
3568 redisplay_preserve_echo_area ();
3573 /* The first time this is called, assume keyboard input comes from DESC
3574 instead of from where we used to expect it.
3575 Subsequent calls mean assume input keyboard can come from DESC
3576 in addition to other places. */
3578 static int add_keyboard_wait_descriptor_called_flag
;
3581 add_keyboard_wait_descriptor (desc
)
3584 if (! add_keyboard_wait_descriptor_called_flag
)
3585 FD_CLR (0, &input_wait_mask
);
3586 add_keyboard_wait_descriptor_called_flag
= 1;
3587 FD_SET (desc
, &input_wait_mask
);
3588 if (desc
> max_keyboard_desc
)
3589 max_keyboard_desc
= desc
;
3592 /* From now on, do not expect DESC to give keyboard input. */
3595 delete_keyboard_wait_descriptor (desc
)
3599 int lim
= max_keyboard_desc
;
3601 FD_CLR (desc
, &input_wait_mask
);
3603 if (desc
== max_keyboard_desc
)
3604 for (fd
= 0; fd
< lim
; fd
++)
3605 if (FD_ISSET (fd
, &input_wait_mask
)
3606 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3607 max_keyboard_desc
= fd
;
3610 /* Return nonzero if *MASK has a bit set
3611 that corresponds to one of the keyboard input descriptors. */
3614 keyboard_bit_set (mask
)
3619 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
3620 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
3621 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3633 if (! noninteractive
|| initialized
)
3635 signal (SIGCHLD
, sigchld_handler
);
3638 FD_ZERO (&input_wait_mask
);
3639 FD_ZERO (&non_keyboard_wait_mask
);
3640 max_process_desc
= 0;
3642 FD_SET (0, &input_wait_mask
);
3644 Vprocess_alist
= Qnil
;
3645 for (i
= 0; i
< MAXDESC
; i
++)
3647 chan_process
[i
] = Qnil
;
3648 proc_buffered_char
[i
] = -1;
3655 stream_process
= intern ("stream");
3657 Qprocessp
= intern ("processp");
3658 staticpro (&Qprocessp
);
3659 Qrun
= intern ("run");
3661 Qstop
= intern ("stop");
3663 Qsignal
= intern ("signal");
3664 staticpro (&Qsignal
);
3666 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
3669 Qexit = intern ("exit");
3670 staticpro (&Qexit); */
3672 Qopen
= intern ("open");
3674 Qclosed
= intern ("closed");
3675 staticpro (&Qclosed
);
3677 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
3678 staticpro (&Qlast_nonmenu_event
);
3680 staticpro (&Vprocess_alist
);
3682 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
3683 "*Non-nil means delete processes immediately when they exit.\n\
3684 nil means don't delete them until `list-processes' is run.");
3686 delete_exited_processes
= 1;
3688 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
3689 "Control type of device used to communicate with subprocesses.\n\
3690 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
3691 The value has no effect if the system has no ptys or if all ptys are busy:\n\
3692 then a pipe is used in any case.\n\
3693 The value takes effect when `start-process' is called.");
3694 Vprocess_connection_type
= Qt
;
3696 defsubr (&Sprocessp
);
3697 defsubr (&Sget_process
);
3698 defsubr (&Sget_buffer_process
);
3699 defsubr (&Sdelete_process
);
3700 defsubr (&Sprocess_status
);
3701 defsubr (&Sprocess_exit_status
);
3702 defsubr (&Sprocess_id
);
3703 defsubr (&Sprocess_name
);
3704 defsubr (&Sprocess_tty_name
);
3705 defsubr (&Sprocess_command
);
3706 defsubr (&Sset_process_buffer
);
3707 defsubr (&Sprocess_buffer
);
3708 defsubr (&Sprocess_mark
);
3709 defsubr (&Sset_process_filter
);
3710 defsubr (&Sprocess_filter
);
3711 defsubr (&Sset_process_sentinel
);
3712 defsubr (&Sset_process_window_size
);
3713 defsubr (&Sprocess_sentinel
);
3714 defsubr (&Sprocess_kill_without_query
);
3715 defsubr (&Slist_processes
);
3716 defsubr (&Sprocess_list
);
3717 defsubr (&Sstart_process
);
3719 defsubr (&Sopen_network_stream
);
3720 #endif /* HAVE_SOCKETS */
3721 defsubr (&Saccept_process_output
);
3722 defsubr (&Sprocess_send_region
);
3723 defsubr (&Sprocess_send_string
);
3724 defsubr (&Sinterrupt_process
);
3725 defsubr (&Skill_process
);
3726 defsubr (&Squit_process
);
3727 defsubr (&Sstop_process
);
3728 defsubr (&Scontinue_process
);
3729 defsubr (&Sprocess_send_eof
);
3730 defsubr (&Ssignal_process
);
3731 defsubr (&Swaiting_for_user_input_p
);
3732 /* defsubr (&Sprocess_connection); */
3736 #else /* not subprocesses */
3738 #include <sys/types.h>
3742 #include "systime.h"
3743 #include "termopts.h"
3744 #include "sysselect.h"
3746 extern int frame_garbaged
;
3749 /* As described above, except assuming that there are no subprocesses:
3751 Wait for timeout to elapse and/or keyboard input to be available.
3754 timeout in seconds, or
3755 zero for no limit, or
3756 -1 means gobble data immediately available but don't wait for any.
3758 read_kbd is a Lisp_Object:
3759 0 to ignore keyboard input, or
3760 1 to return when input is available, or
3761 -1 means caller will actually read the input, so don't throw to
3763 We know that read_kbd will never be a Lisp_Process, since
3764 `subprocesses' isn't defined.
3766 do_display != 0 means redisplay should be done to show subprocess
3767 output that arrives.
3769 Return true iff we received input from any process. */
3772 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
3773 int time_limit
, microsecs
;
3774 Lisp_Object read_kbd
;
3777 EMACS_TIME end_time
, timeout
, *timeout_p
;
3780 /* What does time_limit really mean? */
3781 if (time_limit
|| microsecs
)
3783 /* It's not infinite. */
3784 timeout_p
= &timeout
;
3786 if (time_limit
== -1)
3787 /* In fact, it's zero. */
3788 EMACS_SET_SECS_USECS (timeout
, 0, 0);
3790 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
3792 /* How far in the future is that? */
3793 EMACS_GET_TIME (end_time
);
3794 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
3797 /* It's infinite. */
3800 /* Turn off periodic alarms (in case they are in use)
3801 because the select emulator uses alarms. */
3808 waitchannels
= XINT (read_kbd
) ? 1 : 0;
3810 /* If calling from keyboard input, do not quit
3811 since we want to return C-g as an input character.
3812 Otherwise, do pending quit if requested. */
3813 if (XINT (read_kbd
) >= 0)
3818 EMACS_GET_TIME (*timeout_p
);
3819 EMACS_SUB_TIME (*timeout_p
, end_time
, *timeout_p
);
3820 if (EMACS_TIME_NEG_P (*timeout_p
))
3824 /* Cause C-g and alarm signals to take immediate action,
3825 and cause input available signals to zero out timeout. */
3826 if (XINT (read_kbd
) < 0)
3827 set_waiting_for_input (&timeout
);
3829 /* If a frame has been newly mapped and needs updating,
3830 reprocess its display stuff. */
3831 if (frame_garbaged
&& do_display
)
3832 redisplay_preserve_echo_area ();
3834 if (XINT (read_kbd
) && detect_input_pending ())
3837 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
3840 /* Make C-g and alarm signals set flags again */
3841 clear_waiting_for_input ();
3843 /* If we woke up due to SIGWINCH, actually change size now. */
3844 do_pending_window_change ();
3848 /* If the system call was interrupted, then go around the
3854 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
3855 /* System sometimes fails to deliver SIGIO. */
3856 kill (getpid (), SIGIO
);
3859 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
3863 /* If we have timed out (nfds == 0) or found some input (nfds > 0),
3875 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
3876 /* Don't confuse make-docfile by having two doc strings for this function.
3877 make-docfile does not pay attention to #if, for good reason! */
3880 register Lisp_Object name
;
3885 /* Kill all processes associated with `buffer'.
3886 If `buffer' is nil, kill all processes.
3887 Since we have no subprocesses, this does nothing. */
3889 kill_buffer_processes (buffer
)
3900 defsubr (&Sget_buffer_process
);
3904 #endif /* not subprocesses */