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 X Windows, turn on the code to poll periodically
212 to detect C-g. It isn't actually used when doing interrupt input. */
213 #ifdef HAVE_X_WINDOWS
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 (obj
) ? 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 name
;
535 register Lisp_Object buf
, tail
, proc
;
537 if (NILP (name
)) return Qnil
;
538 buf
= Fget_buffer (name
);
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 proc
;
596 proc
= get_process (proc
);
597 XPROCESS (proc
)->raw_status_low
= Qnil
;
598 XPROCESS (proc
)->raw_status_high
= Qnil
;
599 if (NETCONN_P (proc
))
601 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
602 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
604 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
606 Fkill_process (proc
, Qnil
);
607 /* Do this now, since remove_process will make sigchld_handler do nothing. */
608 XPROCESS (proc
)->status
609 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
610 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
613 remove_process (proc
);
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 proc
;
631 register struct Lisp_Process
*p
;
632 register Lisp_Object status
;
635 proc
= Fget_process (proc
);
637 proc
= get_process (proc
);
643 if (!NILP (p
->raw_status_low
))
647 status
= XCONS (status
)->car
;
648 if (NETCONN_P (proc
))
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 proc
;
665 CHECK_PROCESS (proc
, 0);
666 if (!NILP (XPROCESS (proc
)->raw_status_low
))
667 update_status (XPROCESS (proc
));
668 if (CONSP (XPROCESS (proc
)->status
))
669 return XCONS (XCONS (XPROCESS (proc
)->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 proc
;
680 CHECK_PROCESS (proc
, 0);
681 return XPROCESS (proc
)->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 proc
;
691 CHECK_PROCESS (proc
, 0);
692 return XPROCESS (proc
)->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 proc
;
703 CHECK_PROCESS (proc
, 0);
704 return XPROCESS (proc
)->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 proc
;
714 CHECK_PROCESS (proc
, 0);
715 return XPROCESS (proc
)->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 proc
, buffer
;
724 CHECK_PROCESS (proc
, 0);
726 CHECK_BUFFER (buffer
, 1);
727 XPROCESS (proc
)->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 proc
;
739 CHECK_PROCESS (proc
, 0);
740 return XPROCESS (proc
)->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 proc
;
749 CHECK_PROCESS (proc
, 0);
750 return XPROCESS (proc
)->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 proc
, filter
;
764 CHECK_PROCESS (proc
, 0);
767 FD_CLR (XINT (XPROCESS (proc
)->infd
), &input_wait_mask
);
768 FD_CLR (XINT (XPROCESS (proc
)->infd
), &non_keyboard_wait_mask
);
770 else if (EQ (XPROCESS (proc
)->filter
, Qt
))
772 FD_SET (XINT (XPROCESS (proc
)->infd
), &input_wait_mask
);
773 FD_SET (XINT (XPROCESS (proc
)->infd
), &non_keyboard_wait_mask
);
775 XPROCESS (proc
)->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 proc
;
786 CHECK_PROCESS (proc
, 0);
787 return XPROCESS (proc
)->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 proc
, sentinel
;
798 CHECK_PROCESS (proc
, 0);
799 XPROCESS (proc
)->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 proc
;
810 CHECK_PROCESS (proc
, 0);
811 return XPROCESS (proc
)->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 (proc
, height
, width
)
818 register Lisp_Object proc
, height
, width
;
820 CHECK_PROCESS (proc
, 0);
821 CHECK_NATNUM (height
, 0);
822 CHECK_NATNUM (width
, 0);
823 if (set_window_size (XINT (XPROCESS (proc
)->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 proc
, value
;
840 CHECK_PROCESS (proc
, 0);
841 tem
= XPROCESS (proc
)->kill_without_query
;
842 XPROCESS (proc
)->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 signalled
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
;
1201 SIGTYPE (*sigchld
)();
1203 /* Use volatile to protect variables from being clobbered by longjmp. */
1204 volatile int forkin
, forkout
;
1205 volatile int pty_flag
= 0;
1206 extern char **environ
;
1208 inchannel
= outchannel
= -1;
1211 if (!NILP (Vprocess_connection_type
))
1212 outchannel
= inchannel
= allocate_pty ();
1217 /* On USG systems it does not work to open the pty's tty here
1218 and then close and reopen it in the child. */
1220 /* Don't let this terminal become our controlling terminal
1221 (in case we don't have one). */
1222 forkout
= forkin
= open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1224 forkout
= forkin
= open (pty_name
, O_RDWR
, 0);
1227 report_file_error ("Opening pty", Qnil
);
1229 forkin
= forkout
= -1;
1230 #endif /* not USG */
1234 #endif /* HAVE_PTYS */
1237 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1238 report_file_error ("Opening socketpair", Qnil
);
1239 outchannel
= inchannel
= sv
[0];
1240 forkout
= forkin
= sv
[1];
1242 #else /* not SKTPAIR */
1245 pipe_with_inherited_out (sv
);
1249 pipe_with_inherited_in (sv
);
1252 #else /* not WINDOWSNT */
1259 #endif /* not WINDOWSNT */
1261 #endif /* not SKTPAIR */
1264 /* Replaced by close_process_descs */
1265 set_exclusive_use (inchannel
);
1266 set_exclusive_use (outchannel
);
1269 /* Stride people say it's a mystery why this is needed
1270 as well as the O_NDELAY, but that it fails without this. */
1271 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1274 ioctl (inchannel
, FIONBIO
, &one
);
1279 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1282 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1286 /* Record this as an active process, with its channels.
1287 As a result, child_setup will close Emacs's side of the pipes. */
1288 chan_process
[inchannel
] = process
;
1289 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1290 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1291 /* Record the tty descriptor used in the subprocess. */
1293 XPROCESS (process
)->subtty
= Qnil
;
1295 XSETFASTINT (XPROCESS (process
)->subtty
, forkin
);
1296 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1297 XPROCESS (process
)->status
= Qrun
;
1299 /* Delay interrupts until we have a chance to store
1300 the new fork's pid in its process structure */
1304 #else /* not BSD4_1 */
1305 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1306 sigsetmask (sigmask (SIGCHLD
));
1307 #else /* ordinary USG */
1309 sigchld_deferred
= 0;
1310 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1312 #endif /* ordinary USG */
1313 #endif /* not BSD4_1 */
1314 #endif /* SIGCHLD */
1316 FD_SET (inchannel
, &input_wait_mask
);
1317 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1318 if (inchannel
> max_process_desc
)
1319 max_process_desc
= inchannel
;
1321 /* Until we store the proper pid, enable sigchld_handler
1322 to recognize an unknown pid as standing for this process.
1323 It is very important not to let this `marker' value stay
1324 in the table after this function has returned; if it does
1325 it might cause call-process to hang and subsequent asynchronous
1326 processes to get their return values scrambled. */
1327 XSETINT (XPROCESS (process
)->pid
, -1);
1330 /* child_setup must clobber environ on systems with true vfork.
1331 Protect it from permanent change. */
1332 char **save_environ
= environ
;
1337 #endif /* not WINDOWSNT */
1339 int xforkin
= forkin
;
1340 int xforkout
= forkout
;
1342 #if 0 /* This was probably a mistake--it duplicates code later on,
1343 but fails to handle all the cases. */
1344 /* Make sure SIGCHLD is not blocked in the child. */
1345 sigsetmask (SIGEMPTYMASK
);
1348 /* Make the pty be the controlling terminal of the process. */
1350 /* First, disconnect its current controlling terminal. */
1352 /* We tried doing setsid only if pty_flag, but it caused
1353 process_set_signal to fail on SGI when using a pipe. */
1355 /* Make the pty's terminal the controlling terminal. */
1359 /* We ignore the return value
1360 because faith@cs.unc.edu says that is necessary on Linux. */
1361 ioctl (xforkin
, TIOCSCTTY
, 0);
1364 #else /* not HAVE_SETSID */
1366 /* It's very important to call setpgrp here and no time
1367 afterwards. Otherwise, we lose our controlling tty which
1368 is set when we open the pty. */
1371 #endif /* not HAVE_SETSID */
1372 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1373 if (pty_flag
&& xforkin
>= 0)
1376 tcgetattr (xforkin
, &t
);
1378 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1379 write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1382 #if defined (NTTYDISC) && defined (TIOCSETD)
1383 if (pty_flag
&& xforkin
>= 0)
1385 /* Use new line discipline. */
1386 int ldisc
= NTTYDISC
;
1387 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1392 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1393 can do TIOCSPGRP only to the process's controlling tty. */
1396 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1397 I can't test it since I don't have 4.3. */
1398 int j
= open ("/dev/tty", O_RDWR
, 0);
1399 ioctl (j
, TIOCNOTTY
, 0);
1402 /* In order to get a controlling terminal on some versions
1403 of BSD, it is necessary to put the process in pgrp 0
1404 before it opens the terminal. */
1412 #endif /* TIOCNOTTY */
1414 #if !defined (RTU) && !defined (UNIPLUS)
1415 /*** There is a suggestion that this ought to be a
1416 conditional on TIOCSPGRP. */
1417 /* Now close the pty (if we had it open) and reopen it.
1418 This makes the pty the controlling terminal of the subprocess. */
1421 #ifdef SET_CHILD_PTY_PGRP
1422 int pgrp
= getpid ();
1425 /* I wonder if close (open (pty_name, ...)) would work? */
1428 xforkout
= xforkin
= open (pty_name
, O_RDWR
, 0);
1432 write (1, "Couldn't open the pty terminal ", 31);
1433 write (1, pty_name
, strlen (pty_name
));
1438 #ifdef SET_CHILD_PTY_PGRP
1439 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1440 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1443 #endif /* not UNIPLUS and not RTU */
1444 #ifdef SETUP_SLAVE_PTY
1449 #endif /* SETUP_SLAVE_PTY */
1451 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1452 Now reenable it in the child, so it will die when we want it to. */
1454 signal (SIGHUP
, SIG_DFL
);
1456 #endif /* HAVE_PTYS */
1461 #else /* not BSD4_1 */
1462 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1463 sigsetmask (SIGEMPTYMASK
);
1464 #else /* ordinary USG */
1466 signal (SIGCHLD
, sigchld
);
1468 #endif /* ordinary USG */
1469 #endif /* not BSD4_1 */
1470 #endif /* SIGCHLD */
1472 signal (SIGINT
, SIG_DFL
);
1473 signal (SIGQUIT
, SIG_DFL
);
1476 child_setup_tty (xforkout
);
1478 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1479 new_argv
, 1, current_dir
);
1480 #else /* not WINDOWSNT */
1481 child_setup (xforkin
, xforkout
, xforkout
,
1482 new_argv
, 1, current_dir
);
1483 #endif /* not WINDOWSNT */
1485 environ
= save_environ
;
1492 if (forkin
!= forkout
&& forkout
>= 0)
1494 report_file_error ("Doing vfork", Qnil
);
1497 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
1500 register_child (pid
, inchannel
);
1501 #endif /* WINDOWSNT */
1503 /* If the subfork execv fails, and it exits,
1504 this close hangs. I don't know why.
1505 So have an interrupt jar it loose. */
1507 signal (SIGALRM
, create_process_1
);
1509 XPROCESS (process
)->subtty
= Qnil
;
1514 if (forkin
!= forkout
&& forkout
>= 0)
1519 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1522 XPROCESS (process
)->tty_name
= Qnil
;
1527 #else /* not BSD4_1 */
1528 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1529 sigsetmask (SIGEMPTYMASK
);
1530 #else /* ordinary USG */
1532 signal (SIGCHLD
, sigchld
);
1533 /* Now really handle any of these signals
1534 that came in during this function. */
1535 if (sigchld_deferred
)
1536 kill (getpid (), SIGCHLD
);
1538 #endif /* ordinary USG */
1539 #endif /* not BSD4_1 */
1540 #endif /* SIGCHLD */
1542 #endif /* not VMS */
1546 /* open a TCP network connection to a given HOST/SERVICE. Treated
1547 exactly like a normal process when reading and writing. Only
1548 differences are in status display and process deletion. A network
1549 connection has no PID; you cannot signal it. All you can do is
1550 deactivate and close it via delete-process */
1552 DEFUN ("open-network-stream", Fopen_network_stream
, Sopen_network_stream
,
1554 "Open a TCP connection for a service to a host.\n\
1555 Returns a subprocess-object to represent the connection.\n\
1556 Input and output work as for subprocesses; `delete-process' closes it.\n\
1557 Args are NAME BUFFER HOST SERVICE.\n\
1558 NAME is name for process. It is modified if necessary to make it unique.\n\
1559 BUFFER is the buffer (or buffer-name) to associate with the process.\n\
1560 Process output goes at end of that buffer, unless you specify\n\
1561 an output stream or filter function to handle the output.\n\
1562 BUFFER may be also nil, meaning that this process is not associated\n\
1564 Third arg is name of the host to connect to, or its IP address.\n\
1565 Fourth arg SERVICE is name of the service desired, or an integer\n\
1566 specifying a port number to connect to.")
1567 (name
, buffer
, host
, service
)
1568 Lisp_Object name
, buffer
, host
, service
;
1572 struct sockaddr_in address
;
1573 struct servent
*svc_info
;
1574 struct hostent
*host_info_ptr
, host_info
;
1575 char *(addr_list
[2]);
1576 IN_ADDR numeric_addr
;
1580 struct hostent host_info_fixed
;
1581 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1583 int count
= specpdl_ptr
- specpdl
;
1585 GCPRO4 (name
, buffer
, host
, service
);
1586 CHECK_STRING (name
, 0);
1587 CHECK_STRING (host
, 0);
1588 if (INTEGERP (service
))
1589 port
= htons ((unsigned short) XINT (service
));
1592 CHECK_STRING (service
, 0);
1593 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
1595 error ("Unknown service \"%s\"", XSTRING (service
)->data
);
1596 port
= svc_info
->s_port
;
1605 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
1607 if (! (host_info_ptr
== 0 && h_errno
== TRY_AGAIN
))
1610 Fsleep_for (make_number (1), Qnil
);
1612 if (host_info_ptr
== 0)
1613 /* Attempt to interpret host as numeric inet address */
1615 numeric_addr
= inet_addr ((char *) XSTRING (host
)->data
);
1616 if (NUMERIC_ADDR_ERROR
)
1617 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
1619 host_info_ptr
= &host_info
;
1620 host_info
.h_name
= 0;
1621 host_info
.h_aliases
= 0;
1622 host_info
.h_addrtype
= AF_INET
;
1624 /* Older machines have only one address slot called h_addr.
1625 Newer machines have h_addr_list, but #define h_addr to
1626 be its first element. */
1627 host_info
.h_addr_list
= &(addr_list
[0]);
1629 host_info
.h_addr
= (char*)(&numeric_addr
);
1631 host_info
.h_length
= strlen (addr_list
[0]);
1634 bzero (&address
, sizeof address
);
1635 bcopy (host_info_ptr
->h_addr
, (char *) &address
.sin_addr
,
1636 host_info_ptr
->h_length
);
1637 address
.sin_family
= host_info_ptr
->h_addrtype
;
1638 address
.sin_port
= port
;
1640 s
= socket (host_info_ptr
->h_addrtype
, SOCK_STREAM
, 0);
1642 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1644 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
1645 when connect is interrupted. So let's not let it get interrupted.
1646 Note we do not turn off polling, because polling is only used
1647 when not interrupt_input, and thus not normally used on the systems
1648 which have this bug. On systems which use polling, there's no way
1649 to quit if polling is turned off. */
1650 if (interrupt_input
)
1653 /* Slow down polling to every ten seconds.
1654 Some kernels have a bug which causes retrying connect to fail
1656 #ifdef POLL_FOR_INPUT
1657 bind_polling_period (10);
1661 if (connect (s
, (struct sockaddr
*) &address
, sizeof address
) == -1
1662 && errno
!= EISCONN
)
1668 if (errno
== EADDRINUSE
&& retry
< 20)
1670 /* A delay here is needed on some FreeBSD systems,
1671 and it is harmless, since this retrying takes time anyway
1672 and should be infrequent. */
1673 Fsleep_for (make_number (1), Qnil
);
1680 if (interrupt_input
)
1684 report_file_error ("connection failed",
1685 Fcons (host
, Fcons (name
, Qnil
)));
1688 #ifdef POLL_FOR_INPUT
1689 unbind_to (count
, Qnil
);
1692 if (interrupt_input
)
1696 s
= connect_server (0);
1698 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1699 send_command (s
, C_PORT
, 0, "%s:%d", XSTRING (host
)->data
, ntohs (port
));
1700 send_command (s
, C_DUMB
, 1, 0);
1706 report_file_error ("error duplicating socket", Fcons (name
, Qnil
));
1709 buffer
= Fget_buffer_create (buffer
);
1710 proc
= make_process (name
);
1712 chan_process
[inch
] = proc
;
1715 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
1718 fcntl (inch
, F_SETFL
, O_NDELAY
);
1722 XPROCESS (proc
)->childp
= host
;
1723 XPROCESS (proc
)->command_channel_p
= Qnil
;
1724 XPROCESS (proc
)->buffer
= buffer
;
1725 XPROCESS (proc
)->sentinel
= Qnil
;
1726 XPROCESS (proc
)->filter
= Qnil
;
1727 XPROCESS (proc
)->command
= Qnil
;
1728 XPROCESS (proc
)->pid
= Qnil
;
1729 XSETINT (XPROCESS (proc
)->infd
, s
);
1730 XSETINT (XPROCESS (proc
)->outfd
, outch
);
1731 XPROCESS (proc
)->status
= Qrun
;
1732 FD_SET (inch
, &input_wait_mask
);
1733 FD_SET (inch
, &non_keyboard_wait_mask
);
1734 if (inch
> max_process_desc
)
1735 max_process_desc
= inch
;
1740 #endif /* HAVE_SOCKETS */
1742 deactivate_process (proc
)
1745 register int inchannel
, outchannel
;
1746 register struct Lisp_Process
*p
= XPROCESS (proc
);
1748 inchannel
= XINT (p
->infd
);
1749 outchannel
= XINT (p
->outfd
);
1753 /* Beware SIGCHLD hereabouts. */
1754 flush_pending_output (inchannel
);
1757 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
1758 sys$
dassgn (outchannel
);
1759 vs
= get_vms_process_pointer (p
->pid
);
1761 give_back_vms_process_stuff (vs
);
1765 if (outchannel
>= 0 && outchannel
!= inchannel
)
1769 XSETINT (p
->infd
, -1);
1770 XSETINT (p
->outfd
, -1);
1771 chan_process
[inchannel
] = Qnil
;
1772 FD_CLR (inchannel
, &input_wait_mask
);
1773 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
1774 if (inchannel
== max_process_desc
)
1777 /* We just closed the highest-numbered process input descriptor,
1778 so recompute the highest-numbered one now. */
1779 max_process_desc
= 0;
1780 for (i
= 0; i
< MAXDESC
; i
++)
1781 if (!NILP (chan_process
[i
]))
1782 max_process_desc
= i
;
1787 /* Close all descriptors currently in use for communication
1788 with subprocess. This is used in a newly-forked subprocess
1789 to get rid of irrelevant descriptors. */
1791 close_process_descs ()
1795 for (i
= 0; i
< MAXDESC
; i
++)
1797 Lisp_Object process
;
1798 process
= chan_process
[i
];
1799 if (!NILP (process
))
1801 int in
= XINT (XPROCESS (process
)->infd
);
1802 int out
= XINT (XPROCESS (process
)->outfd
);
1805 if (out
>= 0 && in
!= out
)
1812 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
1814 "Allow any pending output from subprocesses to be read by Emacs.\n\
1815 It is read into the process' buffers or given to their filter functions.\n\
1816 Non-nil arg PROCESS means do not return until some output has been received\n\
1818 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
1819 seconds and microseconds to wait; return after that much time whether\n\
1820 or not there is input.\n\
1821 Return non-nil iff we received any output before the timeout expired.")
1822 (proc
, timeout
, timeout_msecs
)
1823 register Lisp_Object proc
, timeout
, timeout_msecs
;
1828 if (! NILP (timeout_msecs
))
1830 CHECK_NUMBER (timeout_msecs
, 2);
1831 useconds
= XINT (timeout_msecs
);
1832 if (!INTEGERP (timeout
))
1833 XSETINT (timeout
, 0);
1836 int carry
= useconds
/ 1000000;
1838 XSETINT (timeout
, XINT (timeout
) + carry
);
1839 useconds
-= carry
* 1000000;
1841 /* I think this clause is necessary because C doesn't
1842 guarantee a particular rounding direction for negative
1846 XSETINT (timeout
, XINT (timeout
) - 1);
1847 useconds
+= 1000000;
1854 if (! NILP (timeout
))
1856 CHECK_NUMBER (timeout
, 1);
1857 seconds
= XINT (timeout
);
1870 XSETFASTINT (proc
, 0);
1873 (wait_reading_process_input (seconds
, useconds
, proc
, 0)
1877 /* This variable is different from waiting_for_input in keyboard.c.
1878 It is used to communicate to a lisp process-filter/sentinel (via the
1879 function Fwaiting_for_user_input_p below) whether emacs was waiting
1880 for user-input when that process-filter was called.
1881 waiting_for_input cannot be used as that is by definition 0 when
1882 lisp code is being evalled.
1883 This is also used in record_asynch_buffer_change.
1884 For that purpose, this must be 0
1885 when not inside wait_reading_process_input. */
1886 static int waiting_for_user_input_p
;
1888 /* Read and dispose of subprocess output while waiting for timeout to
1889 elapse and/or keyboard input to be available.
1892 timeout in seconds, or
1893 zero for no limit, or
1894 -1 means gobble data immediately available but don't wait for any.
1897 an additional duration to wait, measured in microseconds.
1898 If this is nonzero and time_limit is 0, then the timeout
1899 consists of MICROSECS only.
1901 READ_KBD is a lisp value:
1902 0 to ignore keyboard input, or
1903 1 to return when input is available, or
1904 -1 meaning caller will actually read the input, so don't throw to
1905 the quit handler, or
1906 a cons cell, meaning wait until its car is non-nil
1907 (and gobble terminal input into the buffer if any arrives), or
1908 a process object, meaning wait until something arrives from that
1909 process. The return value is true iff we read some input from
1912 DO_DISPLAY != 0 means redisplay should be done to show subprocess
1913 output that arrives.
1915 If READ_KBD is a pointer to a struct Lisp_Process, then the
1916 function returns true iff we received input from that process
1917 before the timeout elapsed.
1918 Otherwise, return true iff we received input from any process. */
1920 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
1921 int time_limit
, microsecs
;
1922 Lisp_Object read_kbd
;
1925 register int channel
, nfds
, m
;
1926 static SELECT_TYPE Available
;
1929 EMACS_TIME timeout
, end_time
, garbage
;
1931 int wait_channel
= -1;
1932 struct Lisp_Process
*wait_proc
= 0;
1933 int got_some_input
= 0;
1934 Lisp_Object
*wait_for_cell
= 0;
1936 FD_ZERO (&Available
);
1938 /* If read_kbd is a process to watch, set wait_proc and wait_channel
1940 if (PROCESSP (read_kbd
))
1942 wait_proc
= XPROCESS (read_kbd
);
1943 wait_channel
= XINT (wait_proc
->infd
);
1944 XSETFASTINT (read_kbd
, 0);
1947 /* If waiting for non-nil in a cell, record where. */
1948 if (CONSP (read_kbd
))
1950 wait_for_cell
= &XCONS (read_kbd
)->car
;
1951 XSETFASTINT (read_kbd
, 0);
1954 waiting_for_user_input_p
= XINT (read_kbd
);
1956 /* Since we may need to wait several times,
1957 compute the absolute time to return at. */
1958 if (time_limit
|| microsecs
)
1960 EMACS_GET_TIME (end_time
);
1961 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
1962 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
1967 /* If calling from keyboard input, do not quit
1968 since we want to return C-g as an input character.
1969 Otherwise, do pending quit if requested. */
1970 if (XINT (read_kbd
) >= 0)
1973 /* Exit now if the cell we're waiting for became non-nil. */
1974 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
1977 /* Compute time from now till when time limit is up */
1978 /* Exit if already run out */
1979 if (time_limit
== -1)
1981 /* -1 specified for timeout means
1982 gobble output available now
1983 but don't wait at all. */
1985 EMACS_SET_SECS_USECS (timeout
, 0, 0);
1987 else if (time_limit
|| microsecs
)
1989 EMACS_GET_TIME (timeout
);
1990 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
1991 if (EMACS_TIME_NEG_P (timeout
))
1996 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
1999 /* Cause C-g and alarm signals to take immediate action,
2000 and cause input available signals to zero out timeout.
2002 It is important that we do this before checking for process
2003 activity. If we get a SIGCHLD after the explicit checks for
2004 process activity, timeout is the only way we will know. */
2005 if (XINT (read_kbd
) < 0)
2006 set_waiting_for_input (&timeout
);
2008 /* If status of something has changed, and no input is
2009 available, notify the user of the change right away. After
2010 this explicit check, we'll let the SIGCHLD handler zap
2011 timeout to get our attention. */
2012 if (update_tick
!= process_tick
&& do_display
)
2014 Atemp
= input_wait_mask
;
2015 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2016 if ((select (MAXDESC
, &Atemp
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2020 /* It's okay for us to do this and then continue with
2021 the loop, since timeout has already been zeroed out. */
2022 clear_waiting_for_input ();
2027 /* Don't wait for output from a non-running process. */
2028 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
2029 update_status (wait_proc
);
2031 && ! EQ (wait_proc
->status
, Qrun
))
2033 clear_waiting_for_input ();
2037 /* Wait till there is something to do */
2039 if (! XINT (read_kbd
) && wait_for_cell
== 0)
2040 Available
= non_keyboard_wait_mask
;
2042 Available
= input_wait_mask
;
2044 /* If frame size has changed or the window is newly mapped,
2045 redisplay now, before we start to wait. There is a race
2046 condition here; if a SIGIO arrives between now and the select
2047 and indicates that a frame is trashed, the select may block
2048 displaying a trashed screen. */
2049 if (frame_garbaged
&& do_display
)
2051 clear_waiting_for_input ();
2052 redisplay_preserve_echo_area ();
2053 if (XINT (read_kbd
) < 0)
2054 set_waiting_for_input (&timeout
);
2057 if (XINT (read_kbd
) && detect_input_pending ())
2060 FD_ZERO (&Available
);
2063 nfds
= select (MAXDESC
, &Available
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2068 /* Make C-g and alarm signals set flags again */
2069 clear_waiting_for_input ();
2071 /* If we woke up due to SIGWINCH, actually change size now. */
2072 do_pending_window_change ();
2074 if (time_limit
&& nfds
== 0) /* timeout elapsed */
2078 if (xerrno
== EINTR
)
2079 FD_ZERO (&Available
);
2081 /* Ultrix select seems to return ENOMEM when it is
2082 interrupted. Treat it just like EINTR. Bleah. Note
2083 that we want to test for the "ultrix" CPP symbol, not
2084 "__ultrix__"; the latter is only defined under GCC, but
2085 not by DEC's bundled CC. -JimB */
2086 else if (xerrno
== ENOMEM
)
2087 FD_ZERO (&Available
);
2090 /* This happens for no known reason on ALLIANT.
2091 I am guessing that this is the right response. -- RMS. */
2092 else if (xerrno
== EFAULT
)
2093 FD_ZERO (&Available
);
2095 else if (xerrno
== EBADF
)
2098 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
2099 the child's closure of the pts gives the parent a SIGHUP, and
2100 the ptc file descriptor is automatically closed,
2101 yielding EBADF here or at select() call above.
2102 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
2103 in m/ibmrt-aix.h), and here we just ignore the select error.
2104 Cleanup occurs c/o status_notify after SIGCLD. */
2105 FD_ZERO (&Available
); /* Cannot depend on values returned */
2111 error("select error: %s", strerror (xerrno
));
2113 #if defined(sun) && !defined(USG5_4)
2114 else if (nfds
> 0 && keyboard_bit_set (&Available
)
2116 /* System sometimes fails to deliver SIGIO.
2118 David J. Mackenzie says that Emacs doesn't compile under
2119 Solaris if this code is enabled, thus the USG5_4 in the CPP
2120 conditional. "I haven't noticed any ill effects so far.
2121 If you find a Solaris expert somewhere, they might know
2123 kill (getpid (), SIGIO
);
2126 /* Check for keyboard input */
2127 /* If there is any, return immediately
2128 to give it higher priority than subprocesses */
2130 /* We used to do this if wait_for_cell,
2131 but that caused infinite recursion in selection request events. */
2132 if ((XINT (read_kbd
) || wait_for_cell
)
2133 && detect_input_pending ())
2136 if (detect_input_pending ())
2140 /* Exit now if the cell we're waiting for became non-nil. */
2141 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2145 /* If we think we have keyboard input waiting, but didn't get SIGIO
2146 go read it. This can happen with X on BSD after logging out.
2147 In that case, there really is no input and no SIGIO,
2148 but select says there is input. */
2150 if (XINT (read_kbd
) && interrupt_input
2151 && (keyboard_bit_set (&Available
)))
2156 got_some_input
|= nfds
> 0;
2158 /* If checking input just got us a size-change event from X,
2159 obey it now if we should. */
2160 if (XINT (read_kbd
) || wait_for_cell
)
2161 do_pending_window_change ();
2163 /* Check for data from a process. */
2164 /* Really FIRST_PROC_DESC should be 0 on Unix,
2165 but this is safer in the short run. */
2166 for (channel
= 0; channel
<= max_process_desc
; channel
++)
2168 if (FD_ISSET (channel
, &Available
)
2169 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
2173 /* If waiting for this channel, arrange to return as
2174 soon as no more input to be processed. No more
2176 if (wait_channel
== channel
)
2182 proc
= chan_process
[channel
];
2186 /* Read data from the process, starting with our
2187 buffered-ahead character if we have one. */
2189 nread
= read_process_output (proc
, channel
);
2192 /* Since read_process_output can run a filter,
2193 which can call accept-process-output,
2194 don't try to read from any other processes
2195 before doing the select again. */
2196 FD_ZERO (&Available
);
2199 redisplay_preserve_echo_area ();
2202 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2206 else if (nread
== -1 && errno
== EAGAIN
)
2210 else if (nread
== -1 && errno
== EAGAIN
)
2212 /* Note that we cannot distinguish between no input
2213 available now and a closed pipe.
2214 With luck, a closed pipe will be accompanied by
2215 subprocess termination and SIGCHLD. */
2216 else if (nread
== 0 && !NETCONN_P (proc
))
2218 #endif /* O_NDELAY */
2219 #endif /* O_NONBLOCK */
2220 #endif /* EWOULDBLOCK */
2222 /* On some OSs with ptys, when the process on one end of
2223 a pty exits, the other end gets an error reading with
2224 errno = EIO instead of getting an EOF (0 bytes read).
2225 Therefore, if we get an error reading and errno =
2226 EIO, just continue, because the child process has
2227 exited and should clean itself up soon (e.g. when we
2229 else if (nread
== -1 && errno
== EIO
)
2231 #endif /* HAVE_PTYS */
2232 /* If we can detect process termination, don't consider the process
2233 gone just because its pipe is closed. */
2235 else if (nread
== 0 && !NETCONN_P (proc
))
2240 /* Preserve status of processes already terminated. */
2241 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2242 deactivate_process (proc
);
2243 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2244 update_status (XPROCESS (proc
));
2245 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2246 XPROCESS (proc
)->status
2247 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2250 } /* end for each file descriptor */
2251 } /* end while exit conditions not met */
2253 waiting_for_user_input_p
= 0;
2255 /* If calling from keyboard input, do not quit
2256 since we want to return C-g as an input character.
2257 Otherwise, do pending quit if requested. */
2258 if (XINT (read_kbd
) >= 0)
2260 /* Prevent input_pending from remaining set if we quit. */
2261 clear_input_pending ();
2265 return got_some_input
;
2268 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
2271 read_process_output_call (fun_and_args
)
2272 Lisp_Object fun_and_args
;
2274 return apply1 (XCONS (fun_and_args
)->car
, XCONS (fun_and_args
)->cdr
);
2278 read_process_output_error_handler (error
)
2281 cmd_error_internal (error
, "error in process filter: ");
2283 update_echo_area ();
2284 Fsleep_for (make_number (2), Qnil
);
2287 /* Read pending output from the process channel,
2288 starting with our buffered-ahead character if we have one.
2289 Yield number of characters read.
2291 This function reads at most 1024 characters.
2292 If you want to read all available subprocess output,
2293 you must call it repeatedly until it returns zero. */
2295 read_process_output (proc
, channel
)
2297 register int channel
;
2299 register int nchars
;
2305 register Lisp_Object outstream
;
2306 register struct buffer
*old
= current_buffer
;
2307 register struct Lisp_Process
*p
= XPROCESS (proc
);
2308 register int opoint
;
2311 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2313 vs
= get_vms_process_pointer (p
->pid
);
2317 return(0); /* Really weird if it does this */
2318 if (!(vs
->iosb
[0] & 1))
2319 return -1; /* I/O error */
2322 error ("Could not get VMS process pointer");
2323 chars
= vs
->inputBuffer
;
2324 nchars
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2327 start_vms_process_read (vs
); /* Crank up the next read on the process */
2328 return 1; /* Nothing worth printing, say we got 1 */
2332 if (proc_buffered_char
[channel
] < 0)
2334 nchars
= read_child_output (channel
, chars
, sizeof (chars
));
2336 nchars
= read (channel
, chars
, sizeof chars
);
2340 chars
[0] = proc_buffered_char
[channel
];
2341 proc_buffered_char
[channel
] = -1;
2343 nchars
= read_child_output (channel
, chars
+ 1, sizeof (chars
) - 1);
2345 nchars
= read (channel
, chars
+ 1, sizeof chars
- 1);
2350 nchars
= nchars
+ 1;
2352 #endif /* not VMS */
2354 if (nchars
<= 0) return nchars
;
2356 outstream
= p
->filter
;
2357 if (!NILP (outstream
))
2359 /* We inhibit quit here instead of just catching it so that
2360 hitting ^G when a filter happens to be running won't screw
2362 int count
= specpdl_ptr
- specpdl
;
2363 Lisp_Object odeactivate
;
2364 Lisp_Object obuffer
, okeymap
;
2366 /* No need to gcpro these, because all we do with them later
2367 is test them for EQness, and none of them should be a string. */
2368 odeactivate
= Vdeactivate_mark
;
2369 XSETBUFFER (obuffer
, current_buffer
);
2370 okeymap
= current_buffer
->keymap
;
2372 specbind (Qinhibit_quit
, Qt
);
2373 specbind (Qlast_nonmenu_event
, Qt
);
2375 running_asynch_code
= 1;
2376 internal_condition_case_1 (read_process_output_call
,
2379 Fcons (make_string (chars
,
2382 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
2383 read_process_output_error_handler
);
2384 running_asynch_code
= 0;
2385 restore_match_data ();
2387 /* Handling the process output should not deactivate the mark. */
2388 Vdeactivate_mark
= odeactivate
;
2390 #if 0 /* Call record_asynch_buffer_change unconditionally,
2391 because we might have changed minor modes or other things
2392 that affect key bindings. */
2393 if (! EQ (Fcurrent_buffer (), obuffer
)
2394 || ! EQ (current_buffer
->keymap
, okeymap
))
2396 /* But do it only if the caller is actually going to read events.
2397 Otherwise there's no need to make him wake up, and it could
2398 cause trouble (for example it would make Fsit_for return). */
2399 if (waiting_for_user_input_p
== -1)
2400 record_asynch_buffer_change ();
2403 start_vms_process_read (vs
);
2405 unbind_to (count
, Qnil
);
2409 /* If no filter, write into buffer if it isn't dead. */
2410 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2412 Lisp_Object old_read_only
;
2413 Lisp_Object old_begv
, old_zv
;
2414 Lisp_Object odeactivate
;
2416 odeactivate
= Vdeactivate_mark
;
2418 Fset_buffer (p
->buffer
);
2420 old_read_only
= current_buffer
->read_only
;
2421 XSETFASTINT (old_begv
, BEGV
);
2422 XSETFASTINT (old_zv
, ZV
);
2424 current_buffer
->read_only
= Qnil
;
2426 /* Insert new output into buffer
2427 at the current end-of-output marker,
2428 thus preserving logical ordering of input and output. */
2429 if (XMARKER (p
->mark
)->buffer
)
2430 SET_PT (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
));
2434 /* If the output marker is outside of the visible region, save
2435 the restriction and widen. */
2436 if (! (BEGV
<= point
&& point
<= ZV
))
2439 /* Make sure opoint floats ahead of any new text, just as point
2441 if (point
<= opoint
)
2444 /* Insert after old_begv, but before old_zv. */
2445 if (point
< XFASTINT (old_begv
))
2446 XSETFASTINT (old_begv
, XFASTINT (old_begv
) + nchars
);
2447 if (point
<= XFASTINT (old_zv
))
2448 XSETFASTINT (old_zv
, XFASTINT (old_zv
) + nchars
);
2450 /* Insert before markers in case we are inserting where
2451 the buffer's mark is, and the user's next command is Meta-y. */
2452 insert_before_markers (chars
, nchars
);
2453 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
2455 update_mode_lines
++;
2457 /* If the restriction isn't what it should be, set it. */
2458 if (XFASTINT (old_begv
) != BEGV
|| XFASTINT (old_zv
) != ZV
)
2459 Fnarrow_to_region (old_begv
, old_zv
);
2461 /* Handling the process output should not deactivate the mark. */
2462 Vdeactivate_mark
= odeactivate
;
2464 current_buffer
->read_only
= old_read_only
;
2466 set_buffer_internal (old
);
2469 start_vms_process_read (vs
);
2474 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
2476 "Returns non-nil if emacs is waiting for input from the user.\n\
2477 This is intended for use by asynchronous process output filters and sentinels.")
2480 return (waiting_for_user_input_p
? Qt
: Qnil
);
2483 /* Sending data to subprocess */
2485 jmp_buf send_process_frame
;
2488 send_process_trap ()
2494 longjmp (send_process_frame
, 1);
2497 /* Send some data to process PROC.
2498 BUF is the beginning of the data; LEN is the number of characters.
2499 OBJECT is the Lisp object that the data comes from. */
2501 send_process (proc
, buf
, len
, object
)
2502 volatile Lisp_Object proc
;
2507 /* Use volatile to protect variables from being clobbered by longjmp. */
2509 volatile unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
2512 struct Lisp_Process
*p
= XPROCESS (proc
);
2513 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2516 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2517 update_status (XPROCESS (proc
));
2518 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2519 error ("Process %s not running", procname
);
2522 vs
= get_vms_process_pointer (p
->pid
);
2524 error ("Could not find this process: %x", p
->pid
);
2525 else if (write_to_vms_process (vs
, buf
, len
))
2529 if (pty_max_bytes
== 0)
2531 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
2532 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
2534 if (pty_max_bytes
< 0)
2535 pty_max_bytes
= 250;
2537 pty_max_bytes
= 250;
2539 /* Deduct one, to leave space for the eof. */
2543 if (!setjmp (send_process_frame
))
2547 SIGTYPE (*old_sigpipe
)();
2550 /* Decide how much data we can send in one batch.
2551 Long lines need to be split into multiple batches. */
2552 if (!NILP (XPROCESS (proc
)->pty_flag
))
2554 /* Starting this at zero is always correct when not the first iteration
2555 because the previous iteration ended by sending C-d.
2556 It may not be correct for the first iteration
2557 if a partial line was sent in a separate send_process call.
2558 If that proves worth handling, we need to save linepos
2559 in the process object. */
2562 char *end
= buf
+ len
;
2564 /* Scan through this text for a line that is too long. */
2565 while (ptr
!= end
&& linepos
< pty_max_bytes
)
2573 /* If we found one, break the line there
2574 and put in a C-d to force the buffer through. */
2578 /* Send this batch, using one or more write calls. */
2581 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
2582 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
2583 signal (SIGPIPE
, old_sigpipe
);
2589 || errno
== EWOULDBLOCK
2595 /* Buffer is full. Wait, accepting input;
2596 that may allow the program
2597 to finish doing output and read more. */
2602 /* Running filters might relocate buffers or strings.
2603 Arrange to relocate BUF. */
2604 if (BUFFERP (object
))
2605 offset
= BUF_PTR_CHAR_POS (XBUFFER (object
),
2606 (unsigned char *) buf
);
2607 else if (STRINGP (object
))
2608 offset
= buf
- (char *) XSTRING (object
)->data
;
2610 XSETFASTINT (zero
, 0);
2611 wait_reading_process_input (1, 0, zero
, 0);
2613 if (BUFFERP (object
))
2614 buf
= (char *) BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
2615 else if (STRINGP (object
))
2616 buf
= offset
+ (char *) XSTRING (object
)->data
;
2621 /* This is a real error. */
2622 report_file_error ("writing to process", Fcons (proc
, Qnil
));
2629 /* If we sent just part of the string, put in an EOF
2630 to force it through, before we send the rest. */
2632 Fprocess_send_eof (proc
);
2637 XPROCESS (proc
)->raw_status_low
= Qnil
;
2638 XPROCESS (proc
)->raw_status_high
= Qnil
;
2639 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2640 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2641 deactivate_process (proc
);
2643 error ("Error writing to process %s; closed it", procname
);
2645 error ("SIGPIPE raised on process %s; closed it", procname
);
2650 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
2652 "Send current contents of region as input to PROCESS.\n\
2653 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2654 nil, indicating the current buffer's process.\n\
2655 Called from program, takes three arguments, PROCESS, START and END.\n\
2656 If the region is more than 500 characters long,\n\
2657 it is sent in several bunches. This may happen even for shorter regions.\n\
2658 Output from processes can arrive in between bunches.")
2659 (process
, start
, end
)
2660 Lisp_Object process
, start
, end
;
2665 proc
= get_process (process
);
2666 validate_region (&start
, &end
);
2668 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
2671 start1
= XINT (start
);
2672 send_process (proc
, &FETCH_CHAR (start1
), XINT (end
) - XINT (start
),
2673 Fcurrent_buffer ());
2678 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
2680 "Send PROCESS the contents of STRING as input.\n\
2681 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2682 nil, indicating the current buffer's process.\n\
2683 If STRING is more than 500 characters long,\n\
2684 it is sent in several bunches. This may happen even for shorter strings.\n\
2685 Output from processes can arrive in between bunches.")
2687 Lisp_Object process
, string
;
2690 CHECK_STRING (string
, 1);
2691 proc
= get_process (process
);
2692 send_process (proc
, XSTRING (string
)->data
, XSTRING (string
)->size
, string
);
2696 /* send a signal number SIGNO to PROCESS.
2697 CURRENT_GROUP means send to the process group that currently owns
2698 the terminal being used to communicate with PROCESS.
2699 This is used for various commands in shell mode.
2700 If NOMSG is zero, insert signal-announcements into process's buffers
2703 If we can, we try to signal PROCESS by sending control characters
2704 down the pty. This allows us to signal inferiors who have changed
2705 their uid, for which killpg would return an EPERM error. */
2708 process_send_signal (process
, signo
, current_group
, nomsg
)
2709 Lisp_Object process
;
2711 Lisp_Object current_group
;
2715 register struct Lisp_Process
*p
;
2719 proc
= get_process (process
);
2720 p
= XPROCESS (proc
);
2722 if (!EQ (p
->childp
, Qt
))
2723 error ("Process %s is not a subprocess",
2724 XSTRING (p
->name
)->data
);
2725 if (XINT (p
->infd
) < 0)
2726 error ("Process %s is not active",
2727 XSTRING (p
->name
)->data
);
2729 if (NILP (p
->pty_flag
))
2730 current_group
= Qnil
;
2732 /* If we are using pgrps, get a pgrp number and make it negative. */
2733 if (!NILP (current_group
))
2735 #ifdef SIGNALS_VIA_CHARACTERS
2736 /* If possible, send signals to the entire pgrp
2737 by sending an input character to it. */
2739 /* TERMIOS is the latest and bestest, and seems most likely to
2740 work. If the system has it, use it. */
2747 tcgetattr (XINT (p
->infd
), &t
);
2748 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2752 tcgetattr (XINT (p
->infd
), &t
);
2753 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2757 tcgetattr (XINT (p
->infd
), &t
);
2758 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
2759 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2761 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
2766 #else /* ! HAVE_TERMIOS */
2768 /* On Berkeley descendants, the following IOCTL's retrieve the
2769 current control characters. */
2770 #if defined (TIOCGLTC) && defined (TIOCGETC)
2778 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2779 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
2782 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2783 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
2787 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
2788 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
2790 #endif /* ! defined (SIGTSTP) */
2793 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2795 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
2802 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2803 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2806 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2807 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2811 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2812 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2814 #endif /* ! defined (SIGTSTP) */
2816 #else /* ! defined (TCGETA) */
2817 Your configuration files are messed up
.
2818 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
2819 you'd better be using one of the alternatives above! */
2820 #endif /* ! defined (TCGETA) */
2821 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2822 #endif /* ! defined HAVE_TERMIOS */
2823 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
2826 /* Get the pgrp using the tty itself, if we have that.
2827 Otherwise, use the pty to get the pgrp.
2828 On pfa systems, saka@pfu.fujitsu.co.JP writes:
2829 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
2830 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
2831 His patch indicates that if TIOCGPGRP returns an error, then
2832 we should just assume that p->pid is also the process group id. */
2836 if (!NILP (p
->subtty
))
2837 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
2839 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
2843 gid
= - XFASTINT (p
->pid
);
2844 #endif /* ! defined (pfa) */
2850 #else /* ! defined (TIOCGPGRP ) */
2851 /* Can't select pgrps on this system, so we know that
2852 the child itself heads the pgrp. */
2853 gid
= - XFASTINT (p
->pid
);
2854 #endif /* ! defined (TIOCGPGRP ) */
2857 gid
= - XFASTINT (p
->pid
);
2863 p
->raw_status_low
= Qnil
;
2864 p
->raw_status_high
= Qnil
;
2866 XSETINT (p
->tick
, ++process_tick
);
2870 #endif /* ! defined (SIGCONT) */
2873 send_process (proc
, "\003", 1, Qnil
); /* ^C */
2878 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
2883 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
2886 flush_pending_output (XINT (p
->infd
));
2890 /* If we don't have process groups, send the signal to the immediate
2891 subprocess. That isn't really right, but it's better than any
2892 obvious alternative. */
2895 kill (XFASTINT (p
->pid
), signo
);
2899 /* gid may be a pid, or minus a pgrp's number */
2901 if (!NILP (current_group
))
2902 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
2905 gid
= - XFASTINT (p
->pid
);
2908 #else /* ! defined (TIOCSIGSEND) */
2909 EMACS_KILLPG (-gid
, signo
);
2910 #endif /* ! defined (TIOCSIGSEND) */
2913 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
2914 "Interrupt process PROCESS. May be process or name of one.\n\
2915 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
2916 nil or no arg means current buffer's process.\n\
2917 Second arg CURRENT-GROUP non-nil means send signal to\n\
2918 the current process-group of the process's controlling terminal\n\
2919 rather than to the process's own process group.\n\
2920 If the process is a shell, this means interrupt current subjob\n\
2921 rather than the shell.")
2922 (process
, current_group
)
2923 Lisp_Object process
, current_group
;
2925 process_send_signal (process
, SIGINT
, current_group
, 0);
2929 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
2930 "Kill process PROCESS. May be process or name of one.\n\
2931 See function `interrupt-process' for more details on usage.")
2932 (process
, current_group
)
2933 Lisp_Object process
, current_group
;
2935 process_send_signal (process
, SIGKILL
, current_group
, 0);
2939 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
2940 "Send QUIT signal to process PROCESS. May be process or name of one.\n\
2941 See function `interrupt-process' for more details on usage.")
2942 (process
, current_group
)
2943 Lisp_Object process
, current_group
;
2945 process_send_signal (process
, SIGQUIT
, current_group
, 0);
2949 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
2950 "Stop process PROCESS. May be process or name of one.\n\
2951 See function `interrupt-process' for more details on usage.")
2952 (process
, current_group
)
2953 Lisp_Object process
, current_group
;
2956 error ("no SIGTSTP support");
2958 process_send_signal (process
, SIGTSTP
, current_group
, 0);
2963 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
2964 "Continue process PROCESS. May be process or name of one.\n\
2965 See function `interrupt-process' for more details on usage.")
2966 (process
, current_group
)
2967 Lisp_Object process
, current_group
;
2970 process_send_signal (process
, SIGCONT
, current_group
, 0);
2972 error ("no SIGCONT support");
2977 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
2978 2, 2, "nProcess number: \nnSignal code: ",
2979 "Send the process with process id PID the signal with code SIGCODE.\n\
2980 PID must be an integer. The process need not be a child of this Emacs.\n\
2981 SIGCODE may be an integer, or a symbol whose name is a signal name.")
2983 Lisp_Object pid
, sigcode
;
2985 CHECK_NUMBER (pid
, 0);
2987 #define handle_signal(NAME, VALUE) \
2988 else if (!strcmp (name, NAME)) \
2989 XSETINT (sigcode, VALUE)
2991 if (INTEGERP (sigcode
))
2995 unsigned char *name
;
2997 CHECK_SYMBOL (sigcode
, 1);
2998 name
= XSYMBOL (sigcode
)->name
->data
;
3003 handle_signal ("SIGHUP", SIGHUP
);
3006 handle_signal ("SIGINT", SIGINT
);
3009 handle_signal ("SIGQUIT", SIGQUIT
);
3012 handle_signal ("SIGILL", SIGILL
);
3015 handle_signal ("SIGABRT", SIGABRT
);
3018 handle_signal ("SIGEMT", SIGEMT
);
3021 handle_signal ("SIGKILL", SIGKILL
);
3024 handle_signal ("SIGFPE", SIGFPE
);
3027 handle_signal ("SIGBUS", SIGBUS
);
3030 handle_signal ("SIGSEGV", SIGSEGV
);
3033 handle_signal ("SIGSYS", SIGSYS
);
3036 handle_signal ("SIGPIPE", SIGPIPE
);
3039 handle_signal ("SIGALRM", SIGALRM
);
3042 handle_signal ("SIGTERM", SIGTERM
);
3045 handle_signal ("SIGURG", SIGURG
);
3048 handle_signal ("SIGSTOP", SIGSTOP
);
3051 handle_signal ("SIGTSTP", SIGTSTP
);
3054 handle_signal ("SIGCONT", SIGCONT
);
3057 handle_signal ("SIGCHLD", SIGCHLD
);
3060 handle_signal ("SIGTTIN", SIGTTIN
);
3063 handle_signal ("SIGTTOU", SIGTTOU
);
3066 handle_signal ("SIGIO", SIGIO
);
3069 handle_signal ("SIGXCPU", SIGXCPU
);
3072 handle_signal ("SIGXFSZ", SIGXFSZ
);
3075 handle_signal ("SIGVTALRM", SIGVTALRM
);
3078 handle_signal ("SIGPROF", SIGPROF
);
3081 handle_signal ("SIGWINCH", SIGWINCH
);
3084 handle_signal ("SIGINFO", SIGINFO
);
3087 handle_signal ("SIGUSR1", SIGUSR1
);
3090 handle_signal ("SIGUSR2", SIGUSR2
);
3093 error ("Undefined signal name %s", name
);
3096 #undef handle_signal
3099 /* Only works for kill-type signals */
3100 return make_number (win32_kill_process (XINT (pid
), XINT (sigcode
)));
3102 return make_number (kill (XINT (pid
), XINT (sigcode
)));
3106 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
3107 "Make PROCESS see end-of-file in its input.\n\
3108 Eof comes after any text already sent to it.\n\
3109 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3110 nil, indicating the current buffer's process.\n\
3111 If PROCESS is a network connection, or is a process communicating\n\
3112 through a pipe (as opposed to a pty), then you cannot send any more\n\
3113 text to PROCESS after you call this function.")
3115 Lisp_Object process
;
3119 proc
= get_process (process
);
3121 /* Make sure the process is really alive. */
3122 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3123 update_status (XPROCESS (proc
));
3124 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3125 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
3128 send_process (proc
, "\032", 1, Qnil
); /* ^z */
3130 if (!NILP (XPROCESS (proc
)->pty_flag
))
3131 send_process (proc
, "\004", 1, Qnil
);
3134 close (XINT (XPROCESS (proc
)->outfd
));
3135 XSETINT (XPROCESS (proc
)->outfd
, open (NULL_DEVICE
, O_WRONLY
));
3141 /* Kill all processes associated with `buffer'.
3142 If `buffer' is nil, kill all processes */
3144 kill_buffer_processes (buffer
)
3147 Lisp_Object tail
, proc
;
3149 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3151 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3152 if (GC_PROCESSP (proc
)
3153 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
3155 if (NETCONN_P (proc
))
3156 Fdelete_process (proc
);
3157 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
3158 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
3163 /* On receipt of a signal that a child status has changed,
3164 loop asking about children with changed statuses until
3165 the system says there are no more.
3166 All we do is change the status;
3167 we do not run sentinels or print notifications.
3168 That is saved for the next time keyboard input is done,
3169 in order to avoid timing errors. */
3171 /** WARNING: this can be called during garbage collection.
3172 Therefore, it must not be fooled by the presence of mark bits in
3175 /** USG WARNING: Although it is not obvious from the documentation
3176 in signal(2), on a USG system the SIGCLD handler MUST NOT call
3177 signal() before executing at least one wait(), otherwise the handler
3178 will be called again, resulting in an infinite loop. The relevant
3179 portion of the documentation reads "SIGCLD signals will be queued
3180 and the signal-catching function will be continually reentered until
3181 the queue is empty". Invoking signal() causes the kernel to reexamine
3182 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
3185 sigchld_handler (signo
)
3188 int old_errno
= errno
;
3190 register struct Lisp_Process
*p
;
3191 extern EMACS_TIME
*input_available_clear_time
;
3195 sigheld
|= sigbit (SIGCHLD
);
3207 #endif /* no WUNTRACED */
3208 /* Keep trying to get a status until we get a definitive result. */
3212 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
3214 while (pid
<= 0 && errno
== EINTR
);
3218 /* A real failure. We have done all our job, so return. */
3220 /* USG systems forget handlers when they are used;
3221 must reestablish each time */
3223 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
3226 sigheld
&= ~sigbit (SIGCHLD
);
3234 #endif /* no WNOHANG */
3236 /* Find the process that signaled us, and record its status. */
3239 for (tail
= Vprocess_alist
; XSYMBOL (tail
) != XSYMBOL (Qnil
); tail
= XCONS (tail
)->cdr
)
3241 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3242 p
= XPROCESS (proc
);
3243 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
3248 /* Look for an asynchronous process whose pid hasn't been filled
3251 for (tail
= Vprocess_alist
; XSYMBOL (tail
) != XSYMBOL (Qnil
); tail
= XCONS (tail
)->cdr
)
3253 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3254 p
= XPROCESS (proc
);
3255 if (INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
3260 /* Change the status of the process that was found. */
3263 union { int i
; WAITTYPE wt
; } u
;
3264 int clear_desc_flag
= 0;
3266 XSETINT (p
->tick
, ++process_tick
);
3268 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
3269 XSETINT (p
->raw_status_high
, u
.i
>> 16);
3271 /* If process has terminated, stop waiting for its output. */
3272 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
3273 && XINT (p
->infd
) >= 0)
3274 clear_desc_flag
= 1;
3276 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
3277 if (clear_desc_flag
)
3279 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
3280 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
3283 /* Tell wait_reading_process_input that it needs to wake up and
3285 if (input_available_clear_time
)
3286 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3289 /* There was no asynchronous process found for that id. Check
3290 if we have a synchronous process. */
3293 synch_process_alive
= 0;
3295 /* Report the status of the synchronous process. */
3297 synch_process_retcode
= WRETCODE (w
);
3298 else if (WIFSIGNALED (w
))
3300 int code
= WTERMSIG (w
);
3306 /* Suppress warning if the table has const char *. */
3307 signame
= (char *) sys_siglist
[code
];
3309 signame
= sys_errlist
[code
];
3313 signame
= "unknown";
3315 synch_process_death
= signame
;
3318 /* Tell wait_reading_process_input that it needs to wake up and
3320 if (input_available_clear_time
)
3321 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3324 /* On some systems, we must return right away.
3325 If any more processes want to signal us, we will
3327 Otherwise (on systems that have WNOHANG), loop around
3328 to use up all the processes that have something to tell us. */
3329 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT)
3331 signal (signo
, sigchld_handler
);
3335 #endif /* USG, but not HPUX with WNOHANG */
3341 exec_sentinel_unwind (data
)
3344 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
3349 exec_sentinel_error_handler (error
)
3352 cmd_error_internal (error
, "error in process sentinel: ");
3354 update_echo_area ();
3355 Fsleep_for (make_number (2), Qnil
);
3359 exec_sentinel (proc
, reason
)
3360 Lisp_Object proc
, reason
;
3362 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
3363 register struct Lisp_Process
*p
= XPROCESS (proc
);
3364 int count
= specpdl_ptr
- specpdl
;
3366 /* No need to gcpro these, because all we do with them later
3367 is test them for EQness, and none of them should be a string. */
3368 odeactivate
= Vdeactivate_mark
;
3369 XSETBUFFER (obuffer
, current_buffer
);
3370 okeymap
= current_buffer
->keymap
;
3372 sentinel
= p
->sentinel
;
3373 if (NILP (sentinel
))
3376 /* Zilch the sentinel while it's running, to avoid recursive invocations;
3377 assure that it gets restored no matter how the sentinel exits. */
3379 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
3380 /* Inhibit quit so that random quits don't screw up a running filter. */
3381 specbind (Qinhibit_quit
, Qt
);
3382 specbind (Qlast_nonmenu_event
, Qt
);
3384 running_asynch_code
= 1;
3385 internal_condition_case_1 (read_process_output_call
,
3387 Fcons (proc
, Fcons (reason
, Qnil
))),
3388 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
3389 exec_sentinel_error_handler
);
3390 running_asynch_code
= 0;
3391 restore_match_data ();
3393 Vdeactivate_mark
= odeactivate
;
3395 if (! EQ (Fcurrent_buffer (), obuffer
)
3396 || ! EQ (current_buffer
->keymap
, okeymap
))
3398 /* But do it only if the caller is actually going to read events.
3399 Otherwise there's no need to make him wake up, and it could
3400 cause trouble (for example it would make Fsit_for return). */
3401 if (waiting_for_user_input_p
== -1)
3402 record_asynch_buffer_change ();
3404 unbind_to (count
, Qnil
);
3407 /* Report all recent events of a change in process status
3408 (either run the sentinel or output a message).
3409 This is done while Emacs is waiting for keyboard input. */
3413 register Lisp_Object proc
, buffer
;
3414 Lisp_Object tail
, msg
;
3415 struct gcpro gcpro1
, gcpro2
;
3419 /* We need to gcpro tail; if read_process_output calls a filter
3420 which deletes a process and removes the cons to which tail points
3421 from Vprocess_alist, and then causes a GC, tail is an unprotected
3425 /* Set this now, so that if new processes are created by sentinels
3426 that we run, we get called again to handle their status changes. */
3427 update_tick
= process_tick
;
3429 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
3432 register struct Lisp_Process
*p
;
3434 proc
= Fcdr (Fcar (tail
));
3435 p
= XPROCESS (proc
);
3437 if (XINT (p
->tick
) != XINT (p
->update_tick
))
3439 XSETINT (p
->update_tick
, XINT (p
->tick
));
3441 /* If process is still active, read any output that remains. */
3442 if (XINT (p
->infd
) >= 0)
3443 while (! EQ (p
->filter
, Qt
)
3444 && read_process_output (proc
, XINT (p
->infd
)) > 0);
3448 /* Get the text to use for the message. */
3449 if (!NILP (p
->raw_status_low
))
3451 msg
= status_message (p
->status
);
3453 /* If process is terminated, deactivate it or delete it. */
3455 if (CONSP (p
->status
))
3456 symbol
= XCONS (p
->status
)->car
;
3458 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
3459 || EQ (symbol
, Qclosed
))
3461 if (delete_exited_processes
)
3462 remove_process (proc
);
3464 deactivate_process (proc
);
3467 /* Now output the message suitably. */
3468 if (!NILP (p
->sentinel
))
3469 exec_sentinel (proc
, msg
);
3470 /* Don't bother with a message in the buffer
3471 when a process becomes runnable. */
3472 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
3474 Lisp_Object ro
, tem
;
3475 struct buffer
*old
= current_buffer
;
3478 ro
= XBUFFER (buffer
)->read_only
;
3480 /* Avoid error if buffer is deleted
3481 (probably that's why the process is dead, too) */
3482 if (NILP (XBUFFER (buffer
)->name
))
3484 Fset_buffer (buffer
);
3486 /* Insert new output into buffer
3487 at the current end-of-output marker,
3488 thus preserving logical ordering of input and output. */
3489 if (XMARKER (p
->mark
)->buffer
)
3490 SET_PT (marker_position (p
->mark
));
3493 if (point
<= opoint
)
3494 opoint
+= XSTRING (msg
)->size
+ XSTRING (p
->name
)->size
+ 10;
3496 tem
= current_buffer
->read_only
;
3497 current_buffer
->read_only
= Qnil
;
3498 insert_string ("\nProcess ");
3499 Finsert (1, &p
->name
);
3500 insert_string (" ");
3502 current_buffer
->read_only
= tem
;
3503 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
3506 set_buffer_internal (old
);
3511 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
3512 redisplay_preserve_echo_area ();
3517 /* The first time this is called, assume keyboard input comes from DESC
3518 instead of from where we used to expect it.
3519 Subsequent calls mean assume input keyboard can come from DESC
3520 in addition to other places. */
3522 static int add_keyboard_wait_descriptor_called_flag
;
3525 add_keyboard_wait_descriptor (desc
)
3528 if (! add_keyboard_wait_descriptor_called_flag
)
3529 FD_CLR (0, &input_wait_mask
);
3530 add_keyboard_wait_descriptor_called_flag
= 1;
3531 FD_SET (desc
, &input_wait_mask
);
3532 if (desc
> max_keyboard_desc
)
3533 max_keyboard_desc
= desc
;
3536 /* From now on, do not expect DESC to give keyboard input. */
3539 delete_keyboard_wait_descriptor (desc
)
3543 int lim
= max_keyboard_desc
;
3545 FD_CLR (desc
, &input_wait_mask
);
3547 if (desc
== max_keyboard_desc
)
3548 for (fd
= 0; fd
< lim
; fd
++)
3549 if (FD_ISSET (fd
, &input_wait_mask
)
3550 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3551 max_keyboard_desc
= fd
;
3554 /* Return nonzero if *MASK has a bit set
3555 that corresponds to one of the keyboard input descriptors. */
3558 keyboard_bit_set (mask
)
3563 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
3564 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
3565 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3577 if (! noninteractive
|| initialized
)
3579 signal (SIGCHLD
, sigchld_handler
);
3582 FD_ZERO (&input_wait_mask
);
3583 FD_ZERO (&non_keyboard_wait_mask
);
3584 max_process_desc
= 0;
3586 FD_SET (0, &input_wait_mask
);
3588 Vprocess_alist
= Qnil
;
3589 for (i
= 0; i
< MAXDESC
; i
++)
3591 chan_process
[i
] = Qnil
;
3592 proc_buffered_char
[i
] = -1;
3599 stream_process
= intern ("stream");
3601 Qprocessp
= intern ("processp");
3602 staticpro (&Qprocessp
);
3603 Qrun
= intern ("run");
3605 Qstop
= intern ("stop");
3607 Qsignal
= intern ("signal");
3608 staticpro (&Qsignal
);
3610 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
3613 Qexit = intern ("exit");
3614 staticpro (&Qexit); */
3616 Qopen
= intern ("open");
3618 Qclosed
= intern ("closed");
3619 staticpro (&Qclosed
);
3621 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
3622 staticpro (&Qlast_nonmenu_event
);
3624 staticpro (&Vprocess_alist
);
3626 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
3627 "*Non-nil means delete processes immediately when they exit.\n\
3628 nil means don't delete them until `list-processes' is run.");
3630 delete_exited_processes
= 1;
3632 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
3633 "Control type of device used to communicate with subprocesses.\n\
3634 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
3635 The value has no effect if the system has no ptys or if all ptys are busy:\n\
3636 then a pipe is used in any case.\n\
3637 The value takes effect when `start-process' is called.");
3638 Vprocess_connection_type
= Qt
;
3640 defsubr (&Sprocessp
);
3641 defsubr (&Sget_process
);
3642 defsubr (&Sget_buffer_process
);
3643 defsubr (&Sdelete_process
);
3644 defsubr (&Sprocess_status
);
3645 defsubr (&Sprocess_exit_status
);
3646 defsubr (&Sprocess_id
);
3647 defsubr (&Sprocess_name
);
3648 defsubr (&Sprocess_tty_name
);
3649 defsubr (&Sprocess_command
);
3650 defsubr (&Sset_process_buffer
);
3651 defsubr (&Sprocess_buffer
);
3652 defsubr (&Sprocess_mark
);
3653 defsubr (&Sset_process_filter
);
3654 defsubr (&Sprocess_filter
);
3655 defsubr (&Sset_process_sentinel
);
3656 defsubr (&Sset_process_window_size
);
3657 defsubr (&Sprocess_sentinel
);
3658 defsubr (&Sprocess_kill_without_query
);
3659 defsubr (&Slist_processes
);
3660 defsubr (&Sprocess_list
);
3661 defsubr (&Sstart_process
);
3663 defsubr (&Sopen_network_stream
);
3664 #endif /* HAVE_SOCKETS */
3665 defsubr (&Saccept_process_output
);
3666 defsubr (&Sprocess_send_region
);
3667 defsubr (&Sprocess_send_string
);
3668 defsubr (&Sinterrupt_process
);
3669 defsubr (&Skill_process
);
3670 defsubr (&Squit_process
);
3671 defsubr (&Sstop_process
);
3672 defsubr (&Scontinue_process
);
3673 defsubr (&Sprocess_send_eof
);
3674 defsubr (&Ssignal_process
);
3675 defsubr (&Swaiting_for_user_input_p
);
3676 /* defsubr (&Sprocess_connection); */
3680 #else /* not subprocesses */
3682 #include <sys/types.h>
3686 #include "systime.h"
3687 #include "termopts.h"
3688 #include "sysselect.h"
3690 extern int frame_garbaged
;
3693 /* As described above, except assuming that there are no subprocesses:
3695 Wait for timeout to elapse and/or keyboard input to be available.
3698 timeout in seconds, or
3699 zero for no limit, or
3700 -1 means gobble data immediately available but don't wait for any.
3702 read_kbd is a Lisp_Object:
3703 0 to ignore keyboard input, or
3704 1 to return when input is available, or
3705 -1 means caller will actually read the input, so don't throw to
3707 We know that read_kbd will never be a Lisp_Process, since
3708 `subprocesses' isn't defined.
3710 do_display != 0 means redisplay should be done to show subprocess
3711 output that arrives.
3713 Return true iff we received input from any process. */
3716 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
3717 int time_limit
, microsecs
;
3718 Lisp_Object read_kbd
;
3721 EMACS_TIME end_time
, timeout
, *timeout_p
;
3724 /* What does time_limit really mean? */
3725 if (time_limit
|| microsecs
)
3727 /* It's not infinite. */
3728 timeout_p
= &timeout
;
3730 if (time_limit
== -1)
3731 /* In fact, it's zero. */
3732 EMACS_SET_SECS_USECS (timeout
, 0, 0);
3734 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
3736 /* How far in the future is that? */
3737 EMACS_GET_TIME (end_time
);
3738 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
3741 /* It's infinite. */
3744 /* Turn off periodic alarms (in case they are in use)
3745 because the select emulator uses alarms. */
3752 waitchannels
= XINT (read_kbd
) ? 1 : 0;
3754 /* If calling from keyboard input, do not quit
3755 since we want to return C-g as an input character.
3756 Otherwise, do pending quit if requested. */
3757 if (XINT (read_kbd
) >= 0)
3762 EMACS_GET_TIME (*timeout_p
);
3763 EMACS_SUB_TIME (*timeout_p
, end_time
, *timeout_p
);
3764 if (EMACS_TIME_NEG_P (*timeout_p
))
3768 /* Cause C-g and alarm signals to take immediate action,
3769 and cause input available signals to zero out timeout. */
3770 if (XINT (read_kbd
) < 0)
3771 set_waiting_for_input (&timeout
);
3773 /* If a frame has been newly mapped and needs updating,
3774 reprocess its display stuff. */
3775 if (frame_garbaged
&& do_display
)
3776 redisplay_preserve_echo_area ();
3778 if (XINT (read_kbd
) && detect_input_pending ())
3781 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
3784 /* Make C-g and alarm signals set flags again */
3785 clear_waiting_for_input ();
3787 /* If we woke up due to SIGWINCH, actually change size now. */
3788 do_pending_window_change ();
3792 /* If the system call was interrupted, then go around the
3798 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
3799 /* System sometimes fails to deliver SIGIO. */
3800 kill (getpid (), SIGIO
);
3803 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
3807 /* If we have timed out (nfds == 0) or found some input (nfds > 0),
3819 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
3820 /* Don't confuse make-docfile by having two doc strings for this function.
3821 make-docfile does not pay attention to #if, for good reason! */
3824 register Lisp_Object name
;
3829 /* Kill all processes associated with `buffer'.
3830 If `buffer' is nil, kill all processes.
3831 Since we have no subprocesses, this does nothing. */
3833 kill_buffer_processes (buffer
)
3844 defsubr (&Sget_buffer_process
);
3848 #endif /* not subprocesses */