1 /* Asynchronous subprocess control for GNU Emacs.
2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 1996
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
27 /* This file is split into two parts by the following preprocessor
28 conditional. The 'then' clause contains all of the support for
29 asynchronous subprocesses. The 'else' clause contains stub
30 versions of some of the asynchronous subprocess routines that are
31 often called elsewhere in Emacs, so we don't have to #ifdef the
32 sections that call them. */
40 #include <sys/types.h> /* some typedefs are used in sys/file.h */
50 #endif /* not WINDOWSNT */
52 #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */
53 #include <sys/socket.h>
55 #include <netinet/in.h>
56 #include <arpa/inet.h>
57 #ifdef NEED_NET_ERRNO_H
58 #include <net/errno.h>
59 #endif /* NEED_NET_ERRNO_H */
60 #endif /* HAVE_SOCKETS */
62 /* TERM is a poor-man's SLIP, used on Linux. */
67 /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */
68 #ifdef HAVE_BROKEN_INET_ADDR
69 #define IN_ADDR struct in_addr
70 #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1)
72 #define IN_ADDR unsigned long
73 #define NUMERIC_ADDR_ERROR (numeric_addr == -1)
76 #if defined(BSD) || defined(STRIDE)
77 #include <sys/ioctl.h>
78 #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5)
80 #endif /* HAVE_PTYS and no O_NDELAY */
81 #endif /* BSD or STRIDE */
83 #ifdef BROKEN_O_NONBLOCK
85 #endif /* BROKEN_O_NONBLOCK */
92 #include <sys/sysmacros.h> /* for "minor" */
102 #include "termhooks.h"
103 #include "termopts.h"
104 #include "commands.h"
107 Lisp_Object Qprocessp
;
108 Lisp_Object Qrun
, Qstop
, Qsignal
, Qopen
, Qclosed
;
109 Lisp_Object Qlast_nonmenu_event
;
110 /* Qexit is declared and initialized in eval.c. */
112 /* a process object is a network connection when its childp field is neither
113 Qt nor Qnil but is instead a string (name of foreign host we
114 are connected to + name of port we are connected to) */
117 static Lisp_Object stream_process
;
119 #define NETCONN_P(p) (GC_STRINGP (XPROCESS (p)->childp))
121 #define NETCONN_P(p) 0
122 #endif /* HAVE_SOCKETS */
124 /* Define first descriptor number available for subprocesses. */
126 #define FIRST_PROC_DESC 1
128 #define FIRST_PROC_DESC 3
131 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
134 #if !defined (SIGCHLD) && defined (SIGCLD)
135 #define SIGCHLD SIGCLD
138 #include "syssignal.h"
143 extern char *strerror ();
145 extern char *sys_errlist
[];
152 #ifndef SYS_SIGLIST_DECLARED
157 extern char *sys_siglist
[];
158 #endif /* not LINUX */
160 char *sys_siglist
[] =
166 "illegal instruction",
170 "floating point exception",
173 "segmentation violation",
174 "bad argument to system call",
175 "write on a pipe with no one to read it",
177 "software termination signal from kill",
179 "sendable stop signal not from tty",
180 "stop signal from tty",
181 "continue a stopped process",
182 "child status has changed",
183 "background read attempted from control tty",
184 "background write attempted from control tty",
185 "input record available at control tty",
186 "exceeded CPU time limit",
187 "exceeded file size limit"
189 #endif /* not WINDOWSNT */
192 #endif /* ! SYS_SIGLIST_DECLARED */
194 /* t means use pty, nil means use a pipe,
195 maybe other values to come. */
196 static Lisp_Object Vprocess_connection_type
;
200 #include <sys/socket.h>
204 /* These next two vars are non-static since sysdep.c uses them in the
205 emulation of `select'. */
206 /* Number of events of change of status of a process. */
208 /* Number of events for which the user or sentinel has been notified. */
211 #include "sysselect.h"
213 /* If we support a window system, turn on the code to poll periodically
214 to detect C-g. It isn't actually used when doing interrupt input. */
215 #ifdef HAVE_WINDOW_SYSTEM
216 #define POLL_FOR_INPUT
219 /* Mask of bits indicating the descriptors that we wait for input on. */
221 static SELECT_TYPE input_wait_mask
;
223 /* Mask that excludes keyboard input descriptor (s). */
225 static SELECT_TYPE non_keyboard_wait_mask
;
227 /* The largest descriptor currently in use for a process object. */
228 static int max_process_desc
;
230 /* The largest descriptor currently in use for keyboard input. */
231 static int max_keyboard_desc
;
233 /* Nonzero means delete a process right away if it exits. */
234 static int delete_exited_processes
;
236 /* Indexed by descriptor, gives the process (if any) for that descriptor */
237 Lisp_Object chan_process
[MAXDESC
];
239 /* Alist of elements (NAME . PROCESS) */
240 Lisp_Object Vprocess_alist
;
242 /* Buffered-ahead input char from process, indexed by channel.
243 -1 means empty (no char is buffered).
244 Used on sys V where the only way to tell if there is any
245 output from the process is to read at least one char.
246 Always -1 on systems that support FIONREAD. */
248 /* Don't make static; need to access externally. */
249 int proc_buffered_char
[MAXDESC
];
251 static Lisp_Object
get_process ();
253 extern EMACS_TIME
timer_check ();
254 extern int timers_run
;
256 /* Maximum number of bytes to send to a pty without an eof. */
257 static int pty_max_bytes
;
260 /* The file name of the pty opened by allocate_pty. */
262 static char pty_name
[24];
265 /* Compute the Lisp form of the process status, p->status, from
266 the numeric status that was returned by `wait'. */
268 Lisp_Object
status_convert ();
271 struct Lisp_Process
*p
;
273 union { int i
; WAITTYPE wt
; } u
;
274 u
.i
= XFASTINT (p
->raw_status_low
) + (XFASTINT (p
->raw_status_high
) << 16);
275 p
->status
= status_convert (u
.wt
);
276 p
->raw_status_low
= Qnil
;
277 p
->raw_status_high
= Qnil
;
280 /* Convert a process status word in Unix format to
281 the list that we use internally. */
288 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
289 else if (WIFEXITED (w
))
290 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
291 WCOREDUMP (w
) ? Qt
: Qnil
));
292 else if (WIFSIGNALED (w
))
293 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
294 WCOREDUMP (w
) ? Qt
: Qnil
));
299 /* Given a status-list, extract the three pieces of information
300 and store them individually through the three pointers. */
303 decode_status (l
, symbol
, code
, coredump
)
319 *symbol
= XCONS (l
)->car
;
320 tem
= XCONS (l
)->cdr
;
321 *code
= XFASTINT (XCONS (tem
)->car
);
322 tem
= XCONS (tem
)->cdr
;
323 *coredump
= !NILP (tem
);
327 /* Return a string describing a process status list. */
330 status_message (status
)
335 Lisp_Object string
, string2
;
337 decode_status (status
, &symbol
, &code
, &coredump
);
339 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
345 /* Cast to suppress warning if the table has const char *. */
346 signame
= (char *) sys_siglist
[code
];
348 signame
= sys_errlist
[code
];
353 string
= build_string (signame
);
354 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
355 XSTRING (string
)->data
[0] = DOWNCASE (XSTRING (string
)->data
[0]);
356 return concat2 (string
, string2
);
358 else if (EQ (symbol
, Qexit
))
361 return build_string ("finished\n");
362 string
= Fnumber_to_string (make_number (code
));
363 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
364 return concat2 (build_string ("exited abnormally with code "),
365 concat2 (string
, string2
));
368 return Fcopy_sequence (Fsymbol_name (symbol
));
373 /* Open an available pty, returning a file descriptor.
374 Return -1 on failure.
375 The file name of the terminal corresponding to the pty
376 is left in the variable pty_name. */
385 /* Some systems name their pseudoterminals so that there are gaps in
386 the usual sequence - for example, on HP9000/S700 systems, there
387 are no pseudoterminals with names ending in 'f'. So we wait for
388 three failures in a row before deciding that we've reached the
390 int failed_count
= 0;
395 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
396 for (i
= 0; i
< 16; i
++)
399 #ifdef PTY_NAME_SPRINTF
402 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
403 #endif /* no PTY_NAME_SPRINTF */
407 #else /* no PTY_OPEN */
409 /* Unusual IRIS code */
410 *ptyv
= open ("/dev/ptc", O_RDWR
| O_NDELAY
, 0);
413 if (fstat (fd
, &stb
) < 0)
416 if (stat (pty_name
, &stb
) < 0)
419 if (failed_count
>= 3)
425 fd
= open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
427 fd
= open (pty_name
, O_RDWR
| O_NDELAY
, 0);
429 #endif /* not IRIS */
430 #endif /* no PTY_OPEN */
434 /* check to make certain that both sides are available
435 this avoids a nasty yet stupid bug in rlogins */
436 #ifdef PTY_TTY_NAME_SPRINTF
439 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
440 #endif /* no PTY_TTY_NAME_SPRINTF */
442 if (access (pty_name
, 6) != 0)
445 #if !defined(IRIS) && !defined(__sgi)
451 #endif /* not UNIPLUS */
458 #endif /* HAVE_PTYS */
464 struct Lisp_Vector
*vec
;
465 register Lisp_Object val
, tem
, name1
;
466 register struct Lisp_Process
*p
;
470 vec
= allocate_vectorlike ((EMACS_INT
) VECSIZE (struct Lisp_Process
));
471 for (i
= 0; i
< VECSIZE (struct Lisp_Process
); i
++)
472 vec
->contents
[i
] = Qnil
;
473 vec
->size
= VECSIZE (struct Lisp_Process
);
474 p
= (struct Lisp_Process
*)vec
;
476 XSETINT (p
->infd
, -1);
477 XSETINT (p
->outfd
, -1);
478 XSETFASTINT (p
->pid
, 0);
479 XSETFASTINT (p
->tick
, 0);
480 XSETFASTINT (p
->update_tick
, 0);
481 p
->raw_status_low
= Qnil
;
482 p
->raw_status_high
= Qnil
;
484 p
->mark
= Fmake_marker ();
486 /* If name is already in use, modify it until it is unused. */
491 tem
= Fget_process (name1
);
492 if (NILP (tem
)) break;
493 sprintf (suffix
, "<%d>", i
);
494 name1
= concat2 (name
, build_string (suffix
));
498 XSETPROCESS (val
, p
);
499 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
503 remove_process (proc
)
504 register Lisp_Object proc
;
506 register Lisp_Object pair
;
508 pair
= Frassq (proc
, Vprocess_alist
);
509 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
511 deactivate_process (proc
);
514 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
515 "Return t if OBJECT is a process.")
519 return PROCESSP (object
) ? Qt
: Qnil
;
522 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
523 "Return the process named NAME, or nil if there is none.")
525 register Lisp_Object name
;
529 CHECK_STRING (name
, 0);
530 return Fcdr (Fassoc (name
, Vprocess_alist
));
533 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
534 "Return the (or, a) process associated with BUFFER.\n\
535 BUFFER may be a buffer or the name of one.")
537 register Lisp_Object buffer
;
539 register Lisp_Object buf
, tail
, proc
;
541 if (NILP (buffer
)) return Qnil
;
542 buf
= Fget_buffer (buffer
);
543 if (NILP (buf
)) return Qnil
;
545 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
547 proc
= Fcdr (Fcar (tail
));
548 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
554 /* This is how commands for the user decode process arguments. It
555 accepts a process, a process name, a buffer, a buffer name, or nil.
556 Buffers denote the first process in the buffer, and nil denotes the
561 register Lisp_Object name
;
563 register Lisp_Object proc
, obj
;
566 obj
= Fget_process (name
);
568 obj
= Fget_buffer (name
);
570 error ("Process %s does not exist", XSTRING (name
)->data
);
572 else if (NILP (name
))
573 obj
= Fcurrent_buffer ();
577 /* Now obj should be either a buffer object or a process object.
581 proc
= Fget_buffer_process (obj
);
583 error ("Buffer %s has no process", XSTRING (XBUFFER (obj
)->name
)->data
);
587 CHECK_PROCESS (obj
, 0);
593 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
594 "Delete PROCESS: kill it and forget about it immediately.\n\
595 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
596 nil, indicating the current buffer's process.")
598 register Lisp_Object process
;
600 process
= get_process (process
);
601 XPROCESS (process
)->raw_status_low
= Qnil
;
602 XPROCESS (process
)->raw_status_high
= Qnil
;
603 if (NETCONN_P (process
))
605 XPROCESS (process
)->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
606 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
608 else if (XINT (XPROCESS (process
)->infd
) >= 0)
610 Fkill_process (process
, Qnil
);
611 /* Do this now, since remove_process will make sigchld_handler do nothing. */
612 XPROCESS (process
)->status
613 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
614 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
617 remove_process (process
);
621 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
622 "Return the status of PROCESS: a symbol, one of these:\n\
623 run -- for a process that is running.\n\
624 stop -- for a process stopped but continuable.\n\
625 exit -- for a process that has exited.\n\
626 signal -- for a process that has got a fatal signal.\n\
627 open -- for a network stream connection that is open.\n\
628 closed -- for a network stream connection that is closed.\n\
629 nil -- if arg is a process name and no such process exists.\n\
630 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
631 nil, indicating the current buffer's process.")
633 register Lisp_Object process
;
635 register struct Lisp_Process
*p
;
636 register Lisp_Object status
;
638 if (STRINGP (process
))
639 process
= Fget_process (process
);
641 process
= get_process (process
);
646 p
= XPROCESS (process
);
647 if (!NILP (p
->raw_status_low
))
651 status
= XCONS (status
)->car
;
652 if (NETCONN_P (process
))
654 if (EQ (status
, Qrun
))
656 else if (EQ (status
, Qexit
))
662 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
664 "Return the exit status of PROCESS or the signal number that killed it.\n\
665 If PROCESS has not yet exited or died, return 0.")
667 register Lisp_Object process
;
669 CHECK_PROCESS (process
, 0);
670 if (!NILP (XPROCESS (process
)->raw_status_low
))
671 update_status (XPROCESS (process
));
672 if (CONSP (XPROCESS (process
)->status
))
673 return XCONS (XCONS (XPROCESS (process
)->status
)->cdr
)->car
;
674 return make_number (0);
677 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
678 "Return the process id of PROCESS.\n\
679 This is the pid of the Unix process which PROCESS uses or talks to.\n\
680 For a network connection, this value is nil.")
682 register Lisp_Object process
;
684 CHECK_PROCESS (process
, 0);
685 return XPROCESS (process
)->pid
;
688 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
689 "Return the name of PROCESS, as a string.\n\
690 This is the name of the program invoked in PROCESS,\n\
691 possibly modified to make it unique among process names.")
693 register Lisp_Object process
;
695 CHECK_PROCESS (process
, 0);
696 return XPROCESS (process
)->name
;
699 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
700 "Return the command that was executed to start PROCESS.\n\
701 This is a list of strings, the first string being the program executed\n\
702 and the rest of the strings being the arguments given to it.\n\
703 For a non-child channel, this is nil.")
705 register Lisp_Object process
;
707 CHECK_PROCESS (process
, 0);
708 return XPROCESS (process
)->command
;
711 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
712 "Return the name of the terminal PROCESS uses, or nil if none.\n\
713 This is the terminal that the process itself reads and writes on,\n\
714 not the name of the pty that Emacs uses to talk with that terminal.")
716 register Lisp_Object process
;
718 CHECK_PROCESS (process
, 0);
719 return XPROCESS (process
)->tty_name
;
722 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
724 "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).")
726 register Lisp_Object process
, buffer
;
728 CHECK_PROCESS (process
, 0);
730 CHECK_BUFFER (buffer
, 1);
731 XPROCESS (process
)->buffer
= buffer
;
735 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
737 "Return the buffer PROCESS is associated with.\n\
738 Output from PROCESS is inserted in this buffer\n\
739 unless PROCESS has a filter.")
741 register Lisp_Object process
;
743 CHECK_PROCESS (process
, 0);
744 return XPROCESS (process
)->buffer
;
747 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
749 "Return the marker for the end of the last output from PROCESS.")
751 register Lisp_Object process
;
753 CHECK_PROCESS (process
, 0);
754 return XPROCESS (process
)->mark
;
757 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
759 "Give PROCESS the filter function FILTER; nil means no filter.\n\
760 t means stop accepting output from the process.\n\
761 When a process has a filter, each time it does output\n\
762 the entire string of output is passed to the filter.\n\
763 The filter gets two arguments: the process and the string of output.\n\
764 If the process has a filter, its buffer is not used for output.")
766 register Lisp_Object process
, filter
;
768 CHECK_PROCESS (process
, 0);
771 FD_CLR (XINT (XPROCESS (process
)->infd
), &input_wait_mask
);
772 FD_CLR (XINT (XPROCESS (process
)->infd
), &non_keyboard_wait_mask
);
774 else if (EQ (XPROCESS (process
)->filter
, Qt
))
776 FD_SET (XINT (XPROCESS (process
)->infd
), &input_wait_mask
);
777 FD_SET (XINT (XPROCESS (process
)->infd
), &non_keyboard_wait_mask
);
779 XPROCESS (process
)->filter
= filter
;
783 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
785 "Returns the filter function of PROCESS; nil if none.\n\
786 See `set-process-filter' for more info on filter functions.")
788 register Lisp_Object process
;
790 CHECK_PROCESS (process
, 0);
791 return XPROCESS (process
)->filter
;
794 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
796 "Give PROCESS the sentinel SENTINEL; nil for none.\n\
797 The sentinel is called as a function when the process changes state.\n\
798 It gets two arguments: the process, and a string describing the change.")
800 register Lisp_Object process
, sentinel
;
802 CHECK_PROCESS (process
, 0);
803 XPROCESS (process
)->sentinel
= sentinel
;
807 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
809 "Return the sentinel of PROCESS; nil if none.\n\
810 See `set-process-sentinel' for more info on sentinels.")
812 register Lisp_Object process
;
814 CHECK_PROCESS (process
, 0);
815 return XPROCESS (process
)->sentinel
;
818 DEFUN ("set-process-window-size", Fset_process_window_size
,
819 Sset_process_window_size
, 3, 3, 0,
820 "Tell PROCESS that it has logical window size HEIGHT and WIDTH.")
821 (process
, height
, width
)
822 register Lisp_Object process
, height
, width
;
824 CHECK_PROCESS (process
, 0);
825 CHECK_NATNUM (height
, 0);
826 CHECK_NATNUM (width
, 0);
827 if (set_window_size (XINT (XPROCESS (process
)->infd
),
828 XINT (height
), XINT(width
)) <= 0)
834 DEFUN ("process-kill-without-query", Fprocess_kill_without_query
,
835 Sprocess_kill_without_query
, 1, 2, 0,
836 "Say no query needed if PROCESS is running when Emacs is exited.\n\
837 Optional second argument if non-nil says to require a query.\n\
838 Value is t if a query was formerly required.")
840 register Lisp_Object process
, value
;
844 CHECK_PROCESS (process
, 0);
845 tem
= XPROCESS (process
)->kill_without_query
;
846 XPROCESS (process
)->kill_without_query
= Fnull (value
);
851 #if 0 /* Turned off because we don't currently record this info
852 in the process. Perhaps add it. */
853 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
854 "Return the connection type of `PROCESS'.\n\
855 The value is `nil' for a pipe,\n\
856 `t' or `pty' for a pty, or `stream' for a socket connection.")
860 return XPROCESS (process
)->type
;
867 register Lisp_Object tail
, tem
;
868 Lisp_Object proc
, minspace
, tem1
;
869 register struct buffer
*old
= current_buffer
;
870 register struct Lisp_Process
*p
;
874 XSETFASTINT (minspace
, 1);
876 set_buffer_internal (XBUFFER (Vstandard_output
));
877 Fbuffer_disable_undo (Vstandard_output
);
879 current_buffer
->truncate_lines
= Qt
;
882 Proc Status Buffer Tty Command\n\
883 ---- ------ ------ --- -------\n", -1);
885 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
889 proc
= Fcdr (Fcar (tail
));
891 if (NILP (p
->childp
))
894 Finsert (1, &p
->name
);
895 Findent_to (make_number (13), minspace
);
897 if (!NILP (p
->raw_status_low
))
900 if (CONSP (p
->status
))
901 symbol
= XCONS (p
->status
)->car
;
904 if (EQ (symbol
, Qsignal
))
907 tem
= Fcar (Fcdr (p
->status
));
909 if (XINT (tem
) < NSIG
)
910 write_string (sys_errlist
[XINT (tem
)], -1);
913 Fprinc (symbol
, Qnil
);
915 else if (NETCONN_P (proc
))
917 if (EQ (symbol
, Qrun
))
918 write_string ("open", -1);
919 else if (EQ (symbol
, Qexit
))
920 write_string ("closed", -1);
922 Fprinc (symbol
, Qnil
);
925 Fprinc (symbol
, Qnil
);
927 if (EQ (symbol
, Qexit
))
930 tem
= Fcar (Fcdr (p
->status
));
933 sprintf (tembuf
, " %d", (int) XFASTINT (tem
));
934 write_string (tembuf
, -1);
938 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
939 remove_process (proc
);
941 Findent_to (make_number (22), minspace
);
942 if (NILP (p
->buffer
))
943 insert_string ("(none)");
944 else if (NILP (XBUFFER (p
->buffer
)->name
))
945 insert_string ("(Killed)");
947 Finsert (1, &XBUFFER (p
->buffer
)->name
);
949 Findent_to (make_number (37), minspace
);
951 if (STRINGP (p
->tty_name
))
952 Finsert (1, &p
->tty_name
);
954 insert_string ("(none)");
956 Findent_to (make_number (49), minspace
);
958 if (NETCONN_P (proc
))
960 sprintf (tembuf
, "(network stream connection to %s)\n",
961 XSTRING (p
->childp
)->data
);
962 insert_string (tembuf
);
976 insert_string ("\n");
982 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 0, "",
983 "Display a list of all processes.\n\
984 \(Any processes listed as Exited or Signaled are actually eliminated\n\
985 after the listing is made.)")
988 internal_with_output_to_temp_buffer ("*Process List*",
989 list_processes_1
, Qnil
);
993 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
994 "Return a list of all processes.")
997 return Fmapcar (Qcdr
, Vprocess_alist
);
1000 /* Starting asynchronous inferior processes. */
1002 static Lisp_Object
start_process_unwind ();
1004 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1005 "Start a program in a subprocess. Return the process object for it.\n\
1006 Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\
1007 NAME is name for process. It is modified if necessary to make it unique.\n\
1008 BUFFER is the buffer or (buffer-name) to associate with the process.\n\
1009 Process output goes at end of that buffer, unless you specify\n\
1010 an output stream or filter function to handle the output.\n\
1011 BUFFER may be also nil, meaning that this process is not associated\n\
1013 Third arg is program file name. It is searched for as in the shell.\n\
1014 Remaining arguments are strings to give program as arguments.")
1017 register Lisp_Object
*args
;
1019 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1021 register unsigned char *new_argv
;
1024 register unsigned char **new_argv
;
1027 int count
= specpdl_ptr
- specpdl
;
1031 buffer
= Fget_buffer_create (buffer
);
1033 /* Make sure that the child will be able to chdir to the current
1034 buffer's current directory, or its unhandled equivalent. We
1035 can't just have the child check for an error when it does the
1036 chdir, since it's in a vfork.
1038 We have to GCPRO around this because Fexpand_file_name and
1039 Funhandled_file_name_directory might call a file name handling
1040 function. The argument list is protected by the caller, so all
1041 we really have to worry about is buffer. */
1043 struct gcpro gcpro1
, gcpro2
;
1045 current_dir
= current_buffer
->directory
;
1047 GCPRO2 (buffer
, current_dir
);
1050 = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir
),
1052 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1053 report_file_error ("Setting current directory",
1054 Fcons (current_buffer
->directory
, Qnil
));
1060 CHECK_STRING (name
, 0);
1064 CHECK_STRING (program
, 2);
1067 /* Make a one member argv with all args concatenated
1068 together separated by a blank. */
1069 len
= XSTRING (program
)->size
+ 2;
1070 for (i
= 3; i
< nargs
; i
++)
1073 CHECK_STRING (tem
, i
);
1074 len
+= XSTRING (tem
)->size
+ 1; /* count the blank */
1076 new_argv
= (unsigned char *) alloca (len
);
1077 strcpy (new_argv
, XSTRING (program
)->data
);
1078 for (i
= 3; i
< nargs
; i
++)
1081 CHECK_STRING (tem
, i
);
1082 strcat (new_argv
, " ");
1083 strcat (new_argv
, XSTRING (tem
)->data
);
1085 /* Need to add code here to check for program existence on VMS */
1088 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1090 /* If program file name is not absolute, search our path for it */
1091 if (!IS_DIRECTORY_SEP (XSTRING (program
)->data
[0])
1092 && !(XSTRING (program
)->size
> 1
1093 && IS_DEVICE_SEP (XSTRING (program
)->data
[1])))
1095 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1098 GCPRO4 (name
, program
, buffer
, current_dir
);
1099 openp (Vexec_path
, program
, EXEC_SUFFIXES
, &tem
, 1);
1102 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1103 tem
= Fexpand_file_name (tem
, Qnil
);
1104 new_argv
[0] = XSTRING (tem
)->data
;
1108 if (!NILP (Ffile_directory_p (program
)))
1109 error ("Specified program for new process is a directory");
1111 new_argv
[0] = XSTRING (program
)->data
;
1114 for (i
= 3; i
< nargs
; i
++)
1117 CHECK_STRING (tem
, i
);
1118 new_argv
[i
- 2] = XSTRING (tem
)->data
;
1120 new_argv
[i
- 2] = 0;
1121 #endif /* not VMS */
1123 proc
= make_process (name
);
1124 /* If an error occurs and we can't start the process, we want to
1125 remove it from the process list. This means that each error
1126 check in create_process doesn't need to call remove_process
1127 itself; it's all taken care of here. */
1128 record_unwind_protect (start_process_unwind
, proc
);
1130 XPROCESS (proc
)->childp
= Qt
;
1131 XPROCESS (proc
)->command_channel_p
= Qnil
;
1132 XPROCESS (proc
)->buffer
= buffer
;
1133 XPROCESS (proc
)->sentinel
= Qnil
;
1134 XPROCESS (proc
)->filter
= Qnil
;
1135 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1137 /* Make the process marker point into the process buffer (if any). */
1139 Fset_marker (XPROCESS (proc
)->mark
,
1140 make_number (BUF_ZV (XBUFFER (buffer
))), buffer
);
1142 create_process (proc
, new_argv
, current_dir
);
1144 return unbind_to (count
, proc
);
1147 /* This function is the unwind_protect form for Fstart_process. If
1148 PROC doesn't have its pid set, then we know someone has signaled
1149 an error and the process wasn't started successfully, so we should
1150 remove it from the process list. */
1152 start_process_unwind (proc
)
1155 if (!PROCESSP (proc
))
1158 /* Was PROC started successfully? */
1159 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1160 remove_process (proc
);
1167 create_process_1 (signo
)
1171 /* USG systems forget handlers when they are used;
1172 must reestablish each time */
1173 signal (signo
, create_process_1
);
1177 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1180 /* Mimic blocking of signals on system V, which doesn't really have it. */
1182 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1183 int sigchld_deferred
;
1186 create_process_sigchld ()
1188 signal (SIGCHLD
, create_process_sigchld
);
1190 sigchld_deferred
= 1;
1196 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1197 create_process (process
, new_argv
, current_dir
)
1198 Lisp_Object process
;
1200 Lisp_Object current_dir
;
1202 int pid
, inchannel
, outchannel
;
1204 #ifdef POSIX_SIGNALS
1207 struct sigaction sigint_action
;
1208 struct sigaction sigquit_action
;
1210 struct sigaction sighup_action
;
1212 #else /* !POSIX_SIGNALS */
1214 SIGTYPE (*sigchld
)();
1216 #endif /* !POSIX_SIGNALS */
1217 /* Use volatile to protect variables from being clobbered by longjmp. */
1218 volatile int forkin
, forkout
;
1219 volatile int pty_flag
= 0;
1220 extern char **environ
;
1222 inchannel
= outchannel
= -1;
1225 if (!NILP (Vprocess_connection_type
))
1226 outchannel
= inchannel
= allocate_pty ();
1231 /* On USG systems it does not work to open the pty's tty here
1232 and then close and reopen it in the child. */
1234 /* Don't let this terminal become our controlling terminal
1235 (in case we don't have one). */
1236 forkout
= forkin
= open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1238 forkout
= forkin
= open (pty_name
, O_RDWR
, 0);
1241 report_file_error ("Opening pty", Qnil
);
1243 forkin
= forkout
= -1;
1244 #endif /* not USG */
1248 #endif /* HAVE_PTYS */
1251 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1252 report_file_error ("Opening socketpair", Qnil
);
1253 outchannel
= inchannel
= sv
[0];
1254 forkout
= forkin
= sv
[1];
1256 #else /* not SKTPAIR */
1265 #endif /* not SKTPAIR */
1268 /* Replaced by close_process_descs */
1269 set_exclusive_use (inchannel
);
1270 set_exclusive_use (outchannel
);
1273 /* Stride people say it's a mystery why this is needed
1274 as well as the O_NDELAY, but that it fails without this. */
1275 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1278 ioctl (inchannel
, FIONBIO
, &one
);
1283 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1284 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1287 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1288 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1292 /* Record this as an active process, with its channels.
1293 As a result, child_setup will close Emacs's side of the pipes. */
1294 chan_process
[inchannel
] = process
;
1295 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1296 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1297 /* Record the tty descriptor used in the subprocess. */
1299 XPROCESS (process
)->subtty
= Qnil
;
1301 XSETFASTINT (XPROCESS (process
)->subtty
, forkin
);
1302 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1303 XPROCESS (process
)->status
= Qrun
;
1305 /* Delay interrupts until we have a chance to store
1306 the new fork's pid in its process structure */
1307 #ifdef POSIX_SIGNALS
1308 sigemptyset (&blocked
);
1310 sigaddset (&blocked
, SIGCHLD
);
1313 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1314 this sets the parent's signal handlers as well as the child's.
1315 So delay all interrupts whose handlers the child might munge,
1316 and record the current handlers so they can be restored later. */
1317 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1318 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1320 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1322 #endif /* HAVE_VFORK */
1323 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1324 #else /* !POSIX_SIGNALS */
1328 #else /* not BSD4_1 */
1329 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1330 sigsetmask (sigmask (SIGCHLD
));
1331 #else /* ordinary USG */
1333 sigchld_deferred
= 0;
1334 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1336 #endif /* ordinary USG */
1337 #endif /* not BSD4_1 */
1338 #endif /* SIGCHLD */
1339 #endif /* !POSIX_SIGNALS */
1341 FD_SET (inchannel
, &input_wait_mask
);
1342 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1343 if (inchannel
> max_process_desc
)
1344 max_process_desc
= inchannel
;
1346 /* Until we store the proper pid, enable sigchld_handler
1347 to recognize an unknown pid as standing for this process.
1348 It is very important not to let this `marker' value stay
1349 in the table after this function has returned; if it does
1350 it might cause call-process to hang and subsequent asynchronous
1351 processes to get their return values scrambled. */
1352 XSETINT (XPROCESS (process
)->pid
, -1);
1355 /* child_setup must clobber environ on systems with true vfork.
1356 Protect it from permanent change. */
1357 char **save_environ
= environ
;
1362 #endif /* not WINDOWSNT */
1364 int xforkin
= forkin
;
1365 int xforkout
= forkout
;
1367 #if 0 /* This was probably a mistake--it duplicates code later on,
1368 but fails to handle all the cases. */
1369 /* Make sure SIGCHLD is not blocked in the child. */
1370 sigsetmask (SIGEMPTYMASK
);
1373 /* Make the pty be the controlling terminal of the process. */
1375 /* First, disconnect its current controlling terminal. */
1377 /* We tried doing setsid only if pty_flag, but it caused
1378 process_set_signal to fail on SGI when using a pipe. */
1380 /* Make the pty's terminal the controlling terminal. */
1384 /* We ignore the return value
1385 because faith@cs.unc.edu says that is necessary on Linux. */
1386 ioctl (xforkin
, TIOCSCTTY
, 0);
1389 #else /* not HAVE_SETSID */
1391 /* It's very important to call setpgrp here and no time
1392 afterwards. Otherwise, we lose our controlling tty which
1393 is set when we open the pty. */
1396 #endif /* not HAVE_SETSID */
1397 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1398 if (pty_flag
&& xforkin
>= 0)
1401 tcgetattr (xforkin
, &t
);
1403 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1404 write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1407 #if defined (NTTYDISC) && defined (TIOCSETD)
1408 if (pty_flag
&& xforkin
>= 0)
1410 /* Use new line discipline. */
1411 int ldisc
= NTTYDISC
;
1412 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1417 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1418 can do TIOCSPGRP only to the process's controlling tty. */
1421 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1422 I can't test it since I don't have 4.3. */
1423 int j
= open ("/dev/tty", O_RDWR
, 0);
1424 ioctl (j
, TIOCNOTTY
, 0);
1427 /* In order to get a controlling terminal on some versions
1428 of BSD, it is necessary to put the process in pgrp 0
1429 before it opens the terminal. */
1437 #endif /* TIOCNOTTY */
1439 #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY)
1440 /*** There is a suggestion that this ought to be a
1441 conditional on TIOCSPGRP. */
1442 /* Now close the pty (if we had it open) and reopen it.
1443 This makes the pty the controlling terminal of the subprocess. */
1446 #ifdef SET_CHILD_PTY_PGRP
1447 int pgrp
= getpid ();
1450 /* I wonder if close (open (pty_name, ...)) would work? */
1453 xforkout
= xforkin
= open (pty_name
, O_RDWR
, 0);
1457 write (1, "Couldn't open the pty terminal ", 31);
1458 write (1, pty_name
, strlen (pty_name
));
1463 #ifdef SET_CHILD_PTY_PGRP
1464 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1465 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1468 #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */
1470 #ifdef SETUP_SLAVE_PTY
1475 #endif /* SETUP_SLAVE_PTY */
1477 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1478 Now reenable it in the child, so it will die when we want it to. */
1480 signal (SIGHUP
, SIG_DFL
);
1482 #endif /* HAVE_PTYS */
1484 signal (SIGINT
, SIG_DFL
);
1485 signal (SIGQUIT
, SIG_DFL
);
1487 /* Stop blocking signals in the child. */
1488 #ifdef POSIX_SIGNALS
1489 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1490 #else /* !POSIX_SIGNALS */
1494 #else /* not BSD4_1 */
1495 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1496 sigsetmask (SIGEMPTYMASK
);
1497 #else /* ordinary USG */
1499 signal (SIGCHLD
, sigchld
);
1501 #endif /* ordinary USG */
1502 #endif /* not BSD4_1 */
1503 #endif /* SIGCHLD */
1504 #endif /* !POSIX_SIGNALS */
1507 child_setup_tty (xforkout
);
1509 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1510 new_argv
, 1, current_dir
);
1511 #else /* not WINDOWSNT */
1512 child_setup (xforkin
, xforkout
, xforkout
,
1513 new_argv
, 1, current_dir
);
1514 #endif /* not WINDOWSNT */
1516 environ
= save_environ
;
1519 /* This runs in the Emacs process. */
1524 if (forkin
!= forkout
&& forkout
>= 0)
1529 /* vfork succeeded. */
1530 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
1533 register_child (pid
, inchannel
);
1534 #endif /* WINDOWSNT */
1536 /* If the subfork execv fails, and it exits,
1537 this close hangs. I don't know why.
1538 So have an interrupt jar it loose. */
1540 signal (SIGALRM
, create_process_1
);
1542 XPROCESS (process
)->subtty
= Qnil
;
1547 if (forkin
!= forkout
&& forkout
>= 0)
1552 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1555 XPROCESS (process
)->tty_name
= Qnil
;
1558 /* Restore the signal state whether vfork succeeded or not.
1559 (We will signal an error, below, if it failed.) */
1560 #ifdef POSIX_SIGNALS
1562 /* Restore the parent's signal handlers. */
1563 sigaction (SIGINT
, &sigint_action
, 0);
1564 sigaction (SIGQUIT
, &sigquit_action
, 0);
1566 sigaction (SIGHUP
, &sighup_action
, 0);
1568 #endif /* HAVE_VFORK */
1569 /* Stop blocking signals in the parent. */
1570 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1571 #else /* !POSIX_SIGNALS */
1575 #else /* not BSD4_1 */
1576 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1577 sigsetmask (SIGEMPTYMASK
);
1578 #else /* ordinary USG */
1580 signal (SIGCHLD
, sigchld
);
1581 /* Now really handle any of these signals
1582 that came in during this function. */
1583 if (sigchld_deferred
)
1584 kill (getpid (), SIGCHLD
);
1586 #endif /* ordinary USG */
1587 #endif /* not BSD4_1 */
1588 #endif /* SIGCHLD */
1589 #endif /* !POSIX_SIGNALS */
1591 /* Now generate the error if vfork failed. */
1593 report_file_error ("Doing vfork", Qnil
);
1595 #endif /* not VMS */
1599 /* open a TCP network connection to a given HOST/SERVICE. Treated
1600 exactly like a normal process when reading and writing. Only
1601 differences are in status display and process deletion. A network
1602 connection has no PID; you cannot signal it. All you can do is
1603 deactivate and close it via delete-process */
1605 DEFUN ("open-network-stream", Fopen_network_stream
, Sopen_network_stream
,
1607 "Open a TCP connection for a service to a host.\n\
1608 Returns a subprocess-object to represent the connection.\n\
1609 Input and output work as for subprocesses; `delete-process' closes it.\n\
1610 Args are NAME BUFFER HOST SERVICE.\n\
1611 NAME is name for process. It is modified if necessary to make it unique.\n\
1612 BUFFER is the buffer (or buffer-name) to associate with the process.\n\
1613 Process output goes at end of that buffer, unless you specify\n\
1614 an output stream or filter function to handle the output.\n\
1615 BUFFER may be also nil, meaning that this process is not associated\n\
1617 Third arg is name of the host to connect to, or its IP address.\n\
1618 Fourth arg SERVICE is name of the service desired, or an integer\n\
1619 specifying a port number to connect to.")
1620 (name
, buffer
, host
, service
)
1621 Lisp_Object name
, buffer
, host
, service
;
1625 struct sockaddr_in address
;
1626 struct servent
*svc_info
;
1627 struct hostent
*host_info_ptr
, host_info
;
1628 char *(addr_list
[2]);
1629 IN_ADDR numeric_addr
;
1633 struct hostent host_info_fixed
;
1634 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1636 int count
= specpdl_ptr
- specpdl
;
1639 /* Ensure socket support is loaded if available. */
1640 init_winsock (TRUE
);
1643 GCPRO4 (name
, buffer
, host
, service
);
1644 CHECK_STRING (name
, 0);
1645 CHECK_STRING (host
, 0);
1646 if (INTEGERP (service
))
1647 port
= htons ((unsigned short) XINT (service
));
1650 CHECK_STRING (service
, 0);
1651 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
1653 error ("Unknown service \"%s\"", XSTRING (service
)->data
);
1654 port
= svc_info
->s_port
;
1657 /* Slow down polling to every ten seconds.
1658 Some kernels have a bug which causes retrying connect to fail
1659 after a connect. Polling can interfere with gethostbyname too. */
1660 #ifdef POLL_FOR_INPUT
1661 bind_polling_period (10);
1672 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
1675 if (! (host_info_ptr
== 0 && h_errno
== TRY_AGAIN
))
1678 Fsleep_for (make_number (1), Qnil
);
1680 if (host_info_ptr
== 0)
1681 /* Attempt to interpret host as numeric inet address */
1683 numeric_addr
= inet_addr ((char *) XSTRING (host
)->data
);
1684 if (NUMERIC_ADDR_ERROR
)
1685 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
1687 host_info_ptr
= &host_info
;
1688 host_info
.h_name
= 0;
1689 host_info
.h_aliases
= 0;
1690 host_info
.h_addrtype
= AF_INET
;
1692 /* Older machines have only one address slot called h_addr.
1693 Newer machines have h_addr_list, but #define h_addr to
1694 be its first element. */
1695 host_info
.h_addr_list
= &(addr_list
[0]);
1697 host_info
.h_addr
= (char*)(&numeric_addr
);
1699 /* numeric_addr isn't null-terminated; it has fixed length. */
1700 host_info
.h_length
= sizeof (numeric_addr
);
1703 bzero (&address
, sizeof address
);
1704 bcopy (host_info_ptr
->h_addr
, (char *) &address
.sin_addr
,
1705 host_info_ptr
->h_length
);
1706 address
.sin_family
= host_info_ptr
->h_addrtype
;
1707 address
.sin_port
= port
;
1709 s
= socket (host_info_ptr
->h_addrtype
, SOCK_STREAM
, 0);
1711 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1713 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
1714 when connect is interrupted. So let's not let it get interrupted.
1715 Note we do not turn off polling, because polling is only used
1716 when not interrupt_input, and thus not normally used on the systems
1717 which have this bug. On systems which use polling, there's no way
1718 to quit if polling is turned off. */
1719 if (interrupt_input
)
1727 if (connect (s
, (struct sockaddr
*) &address
, sizeof address
) == -1
1728 && errno
!= EISCONN
)
1736 if (errno
== EADDRINUSE
&& retry
< 20)
1738 /* A delay here is needed on some FreeBSD systems,
1739 and it is harmless, since this retrying takes time anyway
1740 and should be infrequent. */
1741 Fsleep_for (make_number (1), Qnil
);
1748 if (interrupt_input
)
1752 report_file_error ("connection failed",
1753 Fcons (host
, Fcons (name
, Qnil
)));
1758 #ifdef POLL_FOR_INPUT
1759 unbind_to (count
, Qnil
);
1762 if (interrupt_input
)
1766 s
= connect_server (0);
1768 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1769 send_command (s
, C_PORT
, 0, "%s:%d", XSTRING (host
)->data
, ntohs (port
));
1770 send_command (s
, C_DUMB
, 1, 0);
1776 report_file_error ("error duplicating socket", Fcons (name
, Qnil
));
1779 buffer
= Fget_buffer_create (buffer
);
1780 proc
= make_process (name
);
1782 chan_process
[inch
] = proc
;
1785 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
1788 fcntl (inch
, F_SETFL
, O_NDELAY
);
1792 XPROCESS (proc
)->childp
= host
;
1793 XPROCESS (proc
)->command_channel_p
= Qnil
;
1794 XPROCESS (proc
)->buffer
= buffer
;
1795 XPROCESS (proc
)->sentinel
= Qnil
;
1796 XPROCESS (proc
)->filter
= Qnil
;
1797 XPROCESS (proc
)->command
= Qnil
;
1798 XPROCESS (proc
)->pid
= Qnil
;
1799 XSETINT (XPROCESS (proc
)->infd
, inch
);
1800 XSETINT (XPROCESS (proc
)->outfd
, outch
);
1801 XPROCESS (proc
)->status
= Qrun
;
1802 FD_SET (inch
, &input_wait_mask
);
1803 FD_SET (inch
, &non_keyboard_wait_mask
);
1804 if (inch
> max_process_desc
)
1805 max_process_desc
= inch
;
1810 #endif /* HAVE_SOCKETS */
1812 deactivate_process (proc
)
1815 register int inchannel
, outchannel
;
1816 register struct Lisp_Process
*p
= XPROCESS (proc
);
1818 inchannel
= XINT (p
->infd
);
1819 outchannel
= XINT (p
->outfd
);
1823 /* Beware SIGCHLD hereabouts. */
1824 flush_pending_output (inchannel
);
1827 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
1828 sys$
dassgn (outchannel
);
1829 vs
= get_vms_process_pointer (p
->pid
);
1831 give_back_vms_process_stuff (vs
);
1835 if (outchannel
>= 0 && outchannel
!= inchannel
)
1839 XSETINT (p
->infd
, -1);
1840 XSETINT (p
->outfd
, -1);
1841 chan_process
[inchannel
] = Qnil
;
1842 FD_CLR (inchannel
, &input_wait_mask
);
1843 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
1844 if (inchannel
== max_process_desc
)
1847 /* We just closed the highest-numbered process input descriptor,
1848 so recompute the highest-numbered one now. */
1849 max_process_desc
= 0;
1850 for (i
= 0; i
< MAXDESC
; i
++)
1851 if (!NILP (chan_process
[i
]))
1852 max_process_desc
= i
;
1857 /* Close all descriptors currently in use for communication
1858 with subprocess. This is used in a newly-forked subprocess
1859 to get rid of irrelevant descriptors. */
1861 close_process_descs ()
1865 for (i
= 0; i
< MAXDESC
; i
++)
1867 Lisp_Object process
;
1868 process
= chan_process
[i
];
1869 if (!NILP (process
))
1871 int in
= XINT (XPROCESS (process
)->infd
);
1872 int out
= XINT (XPROCESS (process
)->outfd
);
1875 if (out
>= 0 && in
!= out
)
1882 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
1884 "Allow any pending output from subprocesses to be read by Emacs.\n\
1885 It is read into the process' buffers or given to their filter functions.\n\
1886 Non-nil arg PROCESS means do not return until some output has been received\n\
1888 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
1889 seconds and microseconds to wait; return after that much time whether\n\
1890 or not there is input.\n\
1891 Return non-nil iff we received any output before the timeout expired.")
1892 (process
, timeout
, timeout_msecs
)
1893 register Lisp_Object process
, timeout
, timeout_msecs
;
1898 if (! NILP (timeout_msecs
))
1900 CHECK_NUMBER (timeout_msecs
, 2);
1901 useconds
= XINT (timeout_msecs
);
1902 if (!INTEGERP (timeout
))
1903 XSETINT (timeout
, 0);
1906 int carry
= useconds
/ 1000000;
1908 XSETINT (timeout
, XINT (timeout
) + carry
);
1909 useconds
-= carry
* 1000000;
1911 /* I think this clause is necessary because C doesn't
1912 guarantee a particular rounding direction for negative
1916 XSETINT (timeout
, XINT (timeout
) - 1);
1917 useconds
+= 1000000;
1924 if (! NILP (timeout
))
1926 CHECK_NUMBER (timeout
, 1);
1927 seconds
= XINT (timeout
);
1928 if (seconds
< 0 || (seconds
== 0 && useconds
== 0))
1940 XSETFASTINT (process
, 0);
1943 (wait_reading_process_input (seconds
, useconds
, process
, 0)
1947 /* This variable is different from waiting_for_input in keyboard.c.
1948 It is used to communicate to a lisp process-filter/sentinel (via the
1949 function Fwaiting_for_user_input_p below) whether emacs was waiting
1950 for user-input when that process-filter was called.
1951 waiting_for_input cannot be used as that is by definition 0 when
1952 lisp code is being evalled.
1953 This is also used in record_asynch_buffer_change.
1954 For that purpose, this must be 0
1955 when not inside wait_reading_process_input. */
1956 static int waiting_for_user_input_p
;
1958 /* This is here so breakpoints can be put on it. */
1960 wait_reading_process_input_1 ()
1964 /* Read and dispose of subprocess output while waiting for timeout to
1965 elapse and/or keyboard input to be available.
1968 timeout in seconds, or
1969 zero for no limit, or
1970 -1 means gobble data immediately available but don't wait for any.
1973 an additional duration to wait, measured in microseconds.
1974 If this is nonzero and time_limit is 0, then the timeout
1975 consists of MICROSECS only.
1977 READ_KBD is a lisp value:
1978 0 to ignore keyboard input, or
1979 1 to return when input is available, or
1980 -1 meaning caller will actually read the input, so don't throw to
1981 the quit handler, or
1982 a cons cell, meaning wait until its car is non-nil
1983 (and gobble terminal input into the buffer if any arrives), or
1984 a process object, meaning wait until something arrives from that
1985 process. The return value is true iff we read some input from
1988 DO_DISPLAY != 0 means redisplay should be done to show subprocess
1989 output that arrives.
1991 If READ_KBD is a pointer to a struct Lisp_Process, then the
1992 function returns true iff we received input from that process
1993 before the timeout elapsed.
1994 Otherwise, return true iff we received input from any process. */
1996 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
1997 int time_limit
, microsecs
;
1998 Lisp_Object read_kbd
;
2001 register int channel
, nfds
, m
;
2002 static SELECT_TYPE Available
;
2005 EMACS_TIME timeout
, end_time
, garbage
;
2007 int wait_channel
= -1;
2008 struct Lisp_Process
*wait_proc
= 0;
2009 int got_some_input
= 0;
2010 Lisp_Object
*wait_for_cell
= 0;
2012 FD_ZERO (&Available
);
2014 /* If read_kbd is a process to watch, set wait_proc and wait_channel
2016 if (PROCESSP (read_kbd
))
2018 wait_proc
= XPROCESS (read_kbd
);
2019 wait_channel
= XINT (wait_proc
->infd
);
2020 XSETFASTINT (read_kbd
, 0);
2023 /* If waiting for non-nil in a cell, record where. */
2024 if (CONSP (read_kbd
))
2026 wait_for_cell
= &XCONS (read_kbd
)->car
;
2027 XSETFASTINT (read_kbd
, 0);
2030 waiting_for_user_input_p
= XINT (read_kbd
);
2032 /* Since we may need to wait several times,
2033 compute the absolute time to return at. */
2034 if (time_limit
|| microsecs
)
2036 EMACS_GET_TIME (end_time
);
2037 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
2038 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
2043 int timeout_reduced_for_timers
= 0;
2045 /* If calling from keyboard input, do not quit
2046 since we want to return C-g as an input character.
2047 Otherwise, do pending quit if requested. */
2048 if (XINT (read_kbd
) >= 0)
2051 /* Exit now if the cell we're waiting for became non-nil. */
2052 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2055 /* Compute time from now till when time limit is up */
2056 /* Exit if already run out */
2057 if (time_limit
== -1)
2059 /* -1 specified for timeout means
2060 gobble output available now
2061 but don't wait at all. */
2063 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2065 else if (time_limit
|| microsecs
)
2067 EMACS_GET_TIME (timeout
);
2068 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
2069 if (EMACS_TIME_NEG_P (timeout
))
2074 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
2077 /* Normally we run timers here.
2078 But not if wait_for_cell; in those cases,
2079 the wait is supposed to be short,
2080 and those callers cannot handle running arbitrary Lisp code here. */
2081 if (! wait_for_cell
)
2083 EMACS_TIME timer_delay
;
2087 old_timers_run
= timers_run
;
2088 timer_delay
= timer_check (1);
2089 if (timers_run
!= old_timers_run
&& do_display
)
2091 redisplay_preserve_echo_area ();
2092 /* We must retry, since a timer may have requeued itself
2093 and that could alter the time_delay. */
2097 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
2099 EMACS_TIME difference
;
2100 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
2101 if (EMACS_TIME_NEG_P (difference
))
2103 timeout
= timer_delay
;
2104 timeout_reduced_for_timers
= 1;
2107 /* If time_limit is -1, we are not going to wait at all. */
2108 else if (time_limit
!= -1)
2110 /* This is so a breakpoint can be put here. */
2111 wait_reading_process_input_1 ();
2115 /* Cause C-g and alarm signals to take immediate action,
2116 and cause input available signals to zero out timeout.
2118 It is important that we do this before checking for process
2119 activity. If we get a SIGCHLD after the explicit checks for
2120 process activity, timeout is the only way we will know. */
2121 if (XINT (read_kbd
) < 0)
2122 set_waiting_for_input (&timeout
);
2124 /* If status of something has changed, and no input is
2125 available, notify the user of the change right away. After
2126 this explicit check, we'll let the SIGCHLD handler zap
2127 timeout to get our attention. */
2128 if (update_tick
!= process_tick
&& do_display
)
2130 Atemp
= input_wait_mask
;
2131 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2132 if ((select (MAXDESC
, &Atemp
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2136 /* It's okay for us to do this and then continue with
2137 the loop, since timeout has already been zeroed out. */
2138 clear_waiting_for_input ();
2143 /* Don't wait for output from a non-running process. */
2144 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
2145 update_status (wait_proc
);
2147 && ! EQ (wait_proc
->status
, Qrun
))
2149 clear_waiting_for_input ();
2153 /* Wait till there is something to do */
2155 if (! XINT (read_kbd
) && wait_for_cell
== 0)
2156 Available
= non_keyboard_wait_mask
;
2158 Available
= input_wait_mask
;
2160 /* If frame size has changed or the window is newly mapped,
2161 redisplay now, before we start to wait. There is a race
2162 condition here; if a SIGIO arrives between now and the select
2163 and indicates that a frame is trashed, the select may block
2164 displaying a trashed screen. */
2165 if (frame_garbaged
&& do_display
)
2167 clear_waiting_for_input ();
2168 redisplay_preserve_echo_area ();
2169 if (XINT (read_kbd
) < 0)
2170 set_waiting_for_input (&timeout
);
2173 if (XINT (read_kbd
) && detect_input_pending ())
2176 FD_ZERO (&Available
);
2179 nfds
= select (MAXDESC
, &Available
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2184 /* Make C-g and alarm signals set flags again */
2185 clear_waiting_for_input ();
2187 /* If we woke up due to SIGWINCH, actually change size now. */
2188 do_pending_window_change ();
2190 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
2191 /* We wanted the full specified time, so return now. */
2195 if (xerrno
== EINTR
)
2196 FD_ZERO (&Available
);
2198 /* Ultrix select seems to return ENOMEM when it is
2199 interrupted. Treat it just like EINTR. Bleah. Note
2200 that we want to test for the "ultrix" CPP symbol, not
2201 "__ultrix__"; the latter is only defined under GCC, but
2202 not by DEC's bundled CC. -JimB */
2203 else if (xerrno
== ENOMEM
)
2204 FD_ZERO (&Available
);
2207 /* This happens for no known reason on ALLIANT.
2208 I am guessing that this is the right response. -- RMS. */
2209 else if (xerrno
== EFAULT
)
2210 FD_ZERO (&Available
);
2212 else if (xerrno
== EBADF
)
2215 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
2216 the child's closure of the pts gives the parent a SIGHUP, and
2217 the ptc file descriptor is automatically closed,
2218 yielding EBADF here or at select() call above.
2219 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
2220 in m/ibmrt-aix.h), and here we just ignore the select error.
2221 Cleanup occurs c/o status_notify after SIGCLD. */
2222 FD_ZERO (&Available
); /* Cannot depend on values returned */
2228 error ("select error: %s", strerror (xerrno
));
2230 #if defined(sun) && !defined(USG5_4)
2231 else if (nfds
> 0 && keyboard_bit_set (&Available
)
2233 /* System sometimes fails to deliver SIGIO.
2235 David J. Mackenzie says that Emacs doesn't compile under
2236 Solaris if this code is enabled, thus the USG5_4 in the CPP
2237 conditional. "I haven't noticed any ill effects so far.
2238 If you find a Solaris expert somewhere, they might know
2240 kill (getpid (), SIGIO
);
2243 /* Check for keyboard input */
2244 /* If there is any, return immediately
2245 to give it higher priority than subprocesses */
2247 if ((XINT (read_kbd
) != 0)
2248 && detect_input_pending_run_timers (do_display
))
2250 swallow_events (do_display
);
2251 if (detect_input_pending_run_timers (do_display
))
2255 /* If wait_for_cell. check for keyboard input
2256 but don't run any timers.
2257 ??? (It seems wrong to me to check for keyboard
2258 input at all when wait_for_cell, but the code
2259 has been this way since July 1994.
2260 Try changing this after version 19.31.) */
2262 && detect_input_pending ())
2264 swallow_events (do_display
);
2265 if (detect_input_pending ())
2269 /* Exit now if the cell we're waiting for became non-nil. */
2270 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2274 /* If we think we have keyboard input waiting, but didn't get SIGIO
2275 go read it. This can happen with X on BSD after logging out.
2276 In that case, there really is no input and no SIGIO,
2277 but select says there is input. */
2279 if (XINT (read_kbd
) && interrupt_input
2280 && (keyboard_bit_set (&Available
)))
2281 kill (getpid (), SIGIO
);
2285 got_some_input
|= nfds
> 0;
2287 /* If checking input just got us a size-change event from X,
2288 obey it now if we should. */
2289 if (XINT (read_kbd
) || wait_for_cell
)
2290 do_pending_window_change ();
2292 /* Check for data from a process. */
2293 /* Really FIRST_PROC_DESC should be 0 on Unix,
2294 but this is safer in the short run. */
2295 for (channel
= 0; channel
<= max_process_desc
; channel
++)
2297 if (FD_ISSET (channel
, &Available
)
2298 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
2302 /* If waiting for this channel, arrange to return as
2303 soon as no more input to be processed. No more
2305 if (wait_channel
== channel
)
2311 proc
= chan_process
[channel
];
2315 /* Read data from the process, starting with our
2316 buffered-ahead character if we have one. */
2318 nread
= read_process_output (proc
, channel
);
2321 /* Since read_process_output can run a filter,
2322 which can call accept-process-output,
2323 don't try to read from any other processes
2324 before doing the select again. */
2325 FD_ZERO (&Available
);
2328 redisplay_preserve_echo_area ();
2331 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2335 else if (nread
== -1 && errno
== EAGAIN
)
2339 else if (nread
== -1 && errno
== EAGAIN
)
2341 /* Note that we cannot distinguish between no input
2342 available now and a closed pipe.
2343 With luck, a closed pipe will be accompanied by
2344 subprocess termination and SIGCHLD. */
2345 else if (nread
== 0 && !NETCONN_P (proc
))
2347 #endif /* O_NDELAY */
2348 #endif /* O_NONBLOCK */
2349 #endif /* EWOULDBLOCK */
2351 /* On some OSs with ptys, when the process on one end of
2352 a pty exits, the other end gets an error reading with
2353 errno = EIO instead of getting an EOF (0 bytes read).
2354 Therefore, if we get an error reading and errno =
2355 EIO, just continue, because the child process has
2356 exited and should clean itself up soon (e.g. when we
2358 else if (nread
== -1 && errno
== EIO
)
2360 #endif /* HAVE_PTYS */
2361 /* If we can detect process termination, don't consider the process
2362 gone just because its pipe is closed. */
2364 else if (nread
== 0 && !NETCONN_P (proc
))
2369 /* Preserve status of processes already terminated. */
2370 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2371 deactivate_process (proc
);
2372 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2373 update_status (XPROCESS (proc
));
2374 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2375 XPROCESS (proc
)->status
2376 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2379 } /* end for each file descriptor */
2380 } /* end while exit conditions not met */
2382 waiting_for_user_input_p
= 0;
2384 /* If calling from keyboard input, do not quit
2385 since we want to return C-g as an input character.
2386 Otherwise, do pending quit if requested. */
2387 if (XINT (read_kbd
) >= 0)
2389 /* Prevent input_pending from remaining set if we quit. */
2390 clear_input_pending ();
2394 return got_some_input
;
2397 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
2400 read_process_output_call (fun_and_args
)
2401 Lisp_Object fun_and_args
;
2403 return apply1 (XCONS (fun_and_args
)->car
, XCONS (fun_and_args
)->cdr
);
2407 read_process_output_error_handler (error
)
2410 cmd_error_internal (error
, "error in process filter: ");
2412 update_echo_area ();
2413 Fsleep_for (make_number (2), Qnil
);
2416 /* Read pending output from the process channel,
2417 starting with our buffered-ahead character if we have one.
2418 Yield number of characters read.
2420 This function reads at most 1024 characters.
2421 If you want to read all available subprocess output,
2422 you must call it repeatedly until it returns zero. */
2424 read_process_output (proc
, channel
)
2426 register int channel
;
2428 register int nchars
;
2434 register Lisp_Object outstream
;
2435 register struct buffer
*old
= current_buffer
;
2436 register struct Lisp_Process
*p
= XPROCESS (proc
);
2437 register int opoint
;
2440 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2442 vs
= get_vms_process_pointer (p
->pid
);
2446 return(0); /* Really weird if it does this */
2447 if (!(vs
->iosb
[0] & 1))
2448 return -1; /* I/O error */
2451 error ("Could not get VMS process pointer");
2452 chars
= vs
->inputBuffer
;
2453 nchars
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2456 start_vms_process_read (vs
); /* Crank up the next read on the process */
2457 return 1; /* Nothing worth printing, say we got 1 */
2461 if (proc_buffered_char
[channel
] < 0)
2462 nchars
= read (channel
, chars
, sizeof (chars
));
2465 chars
[0] = proc_buffered_char
[channel
];
2466 proc_buffered_char
[channel
] = -1;
2467 nchars
= read (channel
, chars
+ 1, sizeof (chars
) - 1);
2471 nchars
= nchars
+ 1;
2473 #endif /* not VMS */
2475 if (nchars
<= 0) return nchars
;
2477 outstream
= p
->filter
;
2478 if (!NILP (outstream
))
2480 /* We inhibit quit here instead of just catching it so that
2481 hitting ^G when a filter happens to be running won't screw
2483 int count
= specpdl_ptr
- specpdl
;
2484 Lisp_Object odeactivate
;
2485 Lisp_Object obuffer
, okeymap
;
2487 /* No need to gcpro these, because all we do with them later
2488 is test them for EQness, and none of them should be a string. */
2489 odeactivate
= Vdeactivate_mark
;
2490 XSETBUFFER (obuffer
, current_buffer
);
2491 okeymap
= current_buffer
->keymap
;
2493 specbind (Qinhibit_quit
, Qt
);
2494 specbind (Qlast_nonmenu_event
, Qt
);
2496 running_asynch_code
= 1;
2497 internal_condition_case_1 (read_process_output_call
,
2500 Fcons (make_string (chars
,
2503 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
2504 read_process_output_error_handler
);
2505 running_asynch_code
= 0;
2506 restore_match_data ();
2508 /* Handling the process output should not deactivate the mark. */
2509 Vdeactivate_mark
= odeactivate
;
2511 #if 0 /* Call record_asynch_buffer_change unconditionally,
2512 because we might have changed minor modes or other things
2513 that affect key bindings. */
2514 if (! EQ (Fcurrent_buffer (), obuffer
)
2515 || ! EQ (current_buffer
->keymap
, okeymap
))
2517 /* But do it only if the caller is actually going to read events.
2518 Otherwise there's no need to make him wake up, and it could
2519 cause trouble (for example it would make Fsit_for return). */
2520 if (waiting_for_user_input_p
== -1)
2521 record_asynch_buffer_change ();
2524 start_vms_process_read (vs
);
2526 unbind_to (count
, Qnil
);
2530 /* If no filter, write into buffer if it isn't dead. */
2531 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2533 Lisp_Object old_read_only
;
2534 Lisp_Object old_begv
, old_zv
;
2535 Lisp_Object odeactivate
;
2537 odeactivate
= Vdeactivate_mark
;
2539 Fset_buffer (p
->buffer
);
2541 old_read_only
= current_buffer
->read_only
;
2542 XSETFASTINT (old_begv
, BEGV
);
2543 XSETFASTINT (old_zv
, ZV
);
2545 current_buffer
->read_only
= Qnil
;
2547 /* Insert new output into buffer
2548 at the current end-of-output marker,
2549 thus preserving logical ordering of input and output. */
2550 if (XMARKER (p
->mark
)->buffer
)
2551 SET_PT (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
));
2555 /* If the output marker is outside of the visible region, save
2556 the restriction and widen. */
2557 if (! (BEGV
<= point
&& point
<= ZV
))
2560 /* Make sure opoint floats ahead of any new text, just as point
2562 if (point
<= opoint
)
2565 /* Insert after old_begv, but before old_zv. */
2566 if (point
< XFASTINT (old_begv
))
2567 XSETFASTINT (old_begv
, XFASTINT (old_begv
) + nchars
);
2568 if (point
<= XFASTINT (old_zv
))
2569 XSETFASTINT (old_zv
, XFASTINT (old_zv
) + nchars
);
2571 /* Insert before markers in case we are inserting where
2572 the buffer's mark is, and the user's next command is Meta-y. */
2573 insert_before_markers (chars
, nchars
);
2574 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
2576 update_mode_lines
++;
2578 /* If the restriction isn't what it should be, set it. */
2579 if (XFASTINT (old_begv
) != BEGV
|| XFASTINT (old_zv
) != ZV
)
2580 Fnarrow_to_region (old_begv
, old_zv
);
2582 /* Handling the process output should not deactivate the mark. */
2583 Vdeactivate_mark
= odeactivate
;
2585 current_buffer
->read_only
= old_read_only
;
2587 set_buffer_internal (old
);
2590 start_vms_process_read (vs
);
2595 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
2597 "Returns non-nil if emacs is waiting for input from the user.\n\
2598 This is intended for use by asynchronous process output filters and sentinels.")
2601 return (waiting_for_user_input_p
? Qt
: Qnil
);
2604 /* Sending data to subprocess */
2606 jmp_buf send_process_frame
;
2609 send_process_trap ()
2615 longjmp (send_process_frame
, 1);
2618 /* Send some data to process PROC.
2619 BUF is the beginning of the data; LEN is the number of characters.
2620 OBJECT is the Lisp object that the data comes from. */
2622 send_process (proc
, buf
, len
, object
)
2623 volatile Lisp_Object proc
;
2628 /* Use volatile to protect variables from being clobbered by longjmp. */
2630 volatile unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
2633 struct Lisp_Process
*p
= XPROCESS (proc
);
2634 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2637 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2638 update_status (XPROCESS (proc
));
2639 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2640 error ("Process %s not running", procname
);
2643 vs
= get_vms_process_pointer (p
->pid
);
2645 error ("Could not find this process: %x", p
->pid
);
2646 else if (write_to_vms_process (vs
, buf
, len
))
2650 if (pty_max_bytes
== 0)
2652 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
2653 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
2655 if (pty_max_bytes
< 0)
2656 pty_max_bytes
= 250;
2658 pty_max_bytes
= 250;
2660 /* Deduct one, to leave space for the eof. */
2664 if (!setjmp (send_process_frame
))
2668 SIGTYPE (*old_sigpipe
)();
2671 /* Decide how much data we can send in one batch.
2672 Long lines need to be split into multiple batches. */
2673 if (!NILP (XPROCESS (proc
)->pty_flag
))
2675 /* Starting this at zero is always correct when not the first iteration
2676 because the previous iteration ended by sending C-d.
2677 It may not be correct for the first iteration
2678 if a partial line was sent in a separate send_process call.
2679 If that proves worth handling, we need to save linepos
2680 in the process object. */
2683 char *end
= buf
+ len
;
2685 /* Scan through this text for a line that is too long. */
2686 while (ptr
!= end
&& linepos
< pty_max_bytes
)
2694 /* If we found one, break the line there
2695 and put in a C-d to force the buffer through. */
2699 /* Send this batch, using one or more write calls. */
2702 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
2703 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
2704 signal (SIGPIPE
, old_sigpipe
);
2710 || errno
== EWOULDBLOCK
2716 /* Buffer is full. Wait, accepting input;
2717 that may allow the program
2718 to finish doing output and read more. */
2723 /* Running filters might relocate buffers or strings.
2724 Arrange to relocate BUF. */
2725 if (BUFFERP (object
))
2726 offset
= BUF_PTR_CHAR_POS (XBUFFER (object
),
2727 (unsigned char *) buf
);
2728 else if (STRINGP (object
))
2729 offset
= buf
- (char *) XSTRING (object
)->data
;
2731 XSETFASTINT (zero
, 0);
2732 wait_reading_process_input (1, 0, zero
, 0);
2734 if (BUFFERP (object
))
2735 buf
= (char *) BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
2736 else if (STRINGP (object
))
2737 buf
= offset
+ (char *) XSTRING (object
)->data
;
2742 /* This is a real error. */
2743 report_file_error ("writing to process", Fcons (proc
, Qnil
));
2750 /* If we sent just part of the string, put in an EOF
2751 to force it through, before we send the rest. */
2753 Fprocess_send_eof (proc
);
2758 XPROCESS (proc
)->raw_status_low
= Qnil
;
2759 XPROCESS (proc
)->raw_status_high
= Qnil
;
2760 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2761 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2762 deactivate_process (proc
);
2764 error ("Error writing to process %s; closed it", procname
);
2766 error ("SIGPIPE raised on process %s; closed it", procname
);
2771 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
2773 "Send current contents of region as input to PROCESS.\n\
2774 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2775 nil, indicating the current buffer's process.\n\
2776 Called from program, takes three arguments, PROCESS, START and END.\n\
2777 If the region is more than 500 characters long,\n\
2778 it is sent in several bunches. This may happen even for shorter regions.\n\
2779 Output from processes can arrive in between bunches.")
2780 (process
, start
, end
)
2781 Lisp_Object process
, start
, end
;
2786 proc
= get_process (process
);
2787 validate_region (&start
, &end
);
2789 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
2792 start1
= XINT (start
);
2793 send_process (proc
, &FETCH_CHAR (start1
), XINT (end
) - XINT (start
),
2794 Fcurrent_buffer ());
2799 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
2801 "Send PROCESS the contents of STRING as input.\n\
2802 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2803 nil, indicating the current buffer's process.\n\
2804 If STRING is more than 500 characters long,\n\
2805 it is sent in several bunches. This may happen even for shorter strings.\n\
2806 Output from processes can arrive in between bunches.")
2808 Lisp_Object process
, string
;
2811 CHECK_STRING (string
, 1);
2812 proc
= get_process (process
);
2813 send_process (proc
, XSTRING (string
)->data
, XSTRING (string
)->size
, string
);
2817 /* send a signal number SIGNO to PROCESS.
2818 CURRENT_GROUP means send to the process group that currently owns
2819 the terminal being used to communicate with PROCESS.
2820 This is used for various commands in shell mode.
2821 If NOMSG is zero, insert signal-announcements into process's buffers
2824 If we can, we try to signal PROCESS by sending control characters
2825 down the pty. This allows us to signal inferiors who have changed
2826 their uid, for which killpg would return an EPERM error. */
2829 process_send_signal (process
, signo
, current_group
, nomsg
)
2830 Lisp_Object process
;
2832 Lisp_Object current_group
;
2836 register struct Lisp_Process
*p
;
2840 proc
= get_process (process
);
2841 p
= XPROCESS (proc
);
2843 if (!EQ (p
->childp
, Qt
))
2844 error ("Process %s is not a subprocess",
2845 XSTRING (p
->name
)->data
);
2846 if (XINT (p
->infd
) < 0)
2847 error ("Process %s is not active",
2848 XSTRING (p
->name
)->data
);
2850 if (NILP (p
->pty_flag
))
2851 current_group
= Qnil
;
2853 /* If we are using pgrps, get a pgrp number and make it negative. */
2854 if (!NILP (current_group
))
2856 #ifdef SIGNALS_VIA_CHARACTERS
2857 /* If possible, send signals to the entire pgrp
2858 by sending an input character to it. */
2860 /* TERMIOS is the latest and bestest, and seems most likely to
2861 work. If the system has it, use it. */
2868 tcgetattr (XINT (p
->infd
), &t
);
2869 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2873 tcgetattr (XINT (p
->infd
), &t
);
2874 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2878 tcgetattr (XINT (p
->infd
), &t
);
2879 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
2880 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2882 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
2887 #else /* ! HAVE_TERMIOS */
2889 /* On Berkeley descendants, the following IOCTL's retrieve the
2890 current control characters. */
2891 #if defined (TIOCGLTC) && defined (TIOCGETC)
2899 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2900 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
2903 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2904 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
2908 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
2909 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
2911 #endif /* ! defined (SIGTSTP) */
2914 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2916 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
2923 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2924 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2927 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2928 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2932 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2933 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2935 #endif /* ! defined (SIGTSTP) */
2937 #else /* ! defined (TCGETA) */
2938 Your configuration files are messed up
.
2939 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
2940 you'd better be using one of the alternatives above! */
2941 #endif /* ! defined (TCGETA) */
2942 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2943 #endif /* ! defined HAVE_TERMIOS */
2944 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
2947 /* Get the pgrp using the tty itself, if we have that.
2948 Otherwise, use the pty to get the pgrp.
2949 On pfa systems, saka@pfu.fujitsu.co.JP writes:
2950 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
2951 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
2952 His patch indicates that if TIOCGPGRP returns an error, then
2953 we should just assume that p->pid is also the process group id. */
2957 if (!NILP (p
->subtty
))
2958 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
2960 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
2964 gid
= - XFASTINT (p
->pid
);
2965 #endif /* ! defined (pfa) */
2971 #else /* ! defined (TIOCGPGRP ) */
2972 /* Can't select pgrps on this system, so we know that
2973 the child itself heads the pgrp. */
2974 gid
= - XFASTINT (p
->pid
);
2975 #endif /* ! defined (TIOCGPGRP ) */
2978 gid
= - XFASTINT (p
->pid
);
2984 p
->raw_status_low
= Qnil
;
2985 p
->raw_status_high
= Qnil
;
2987 XSETINT (p
->tick
, ++process_tick
);
2991 #endif /* ! defined (SIGCONT) */
2994 send_process (proc
, "\003", 1, Qnil
); /* ^C */
2999 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
3004 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
3007 flush_pending_output (XINT (p
->infd
));
3011 /* If we don't have process groups, send the signal to the immediate
3012 subprocess. That isn't really right, but it's better than any
3013 obvious alternative. */
3016 kill (XFASTINT (p
->pid
), signo
);
3020 /* gid may be a pid, or minus a pgrp's number */
3022 if (!NILP (current_group
))
3023 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
3026 gid
= - XFASTINT (p
->pid
);
3029 #else /* ! defined (TIOCSIGSEND) */
3030 EMACS_KILLPG (-gid
, signo
);
3031 #endif /* ! defined (TIOCSIGSEND) */
3034 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
3035 "Interrupt process PROCESS. May be process or name of one.\n\
3036 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
3037 nil or no arg means current buffer's process.\n\
3038 Second arg CURRENT-GROUP non-nil means send signal to\n\
3039 the current process-group of the process's controlling terminal\n\
3040 rather than to the process's own process group.\n\
3041 If the process is a shell, this means interrupt current subjob\n\
3042 rather than the shell.")
3043 (process
, current_group
)
3044 Lisp_Object process
, current_group
;
3046 process_send_signal (process
, SIGINT
, current_group
, 0);
3050 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
3051 "Kill process PROCESS. May be process or name of one.\n\
3052 See function `interrupt-process' for more details on usage.")
3053 (process
, current_group
)
3054 Lisp_Object process
, current_group
;
3056 process_send_signal (process
, SIGKILL
, current_group
, 0);
3060 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
3061 "Send QUIT signal to process PROCESS. May be process or name of one.\n\
3062 See function `interrupt-process' for more details on usage.")
3063 (process
, current_group
)
3064 Lisp_Object process
, current_group
;
3066 process_send_signal (process
, SIGQUIT
, current_group
, 0);
3070 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
3071 "Stop process PROCESS. May be process or name of one.\n\
3072 See function `interrupt-process' for more details on usage.")
3073 (process
, current_group
)
3074 Lisp_Object process
, current_group
;
3077 error ("no SIGTSTP support");
3079 process_send_signal (process
, SIGTSTP
, current_group
, 0);
3084 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
3085 "Continue process PROCESS. May be process or name of one.\n\
3086 See function `interrupt-process' for more details on usage.")
3087 (process
, current_group
)
3088 Lisp_Object process
, current_group
;
3091 process_send_signal (process
, SIGCONT
, current_group
, 0);
3093 error ("no SIGCONT support");
3098 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
3099 2, 2, "nProcess number: \nnSignal code: ",
3100 "Send the process with process id PID the signal with code SIGCODE.\n\
3101 PID must be an integer. The process need not be a child of this Emacs.\n\
3102 SIGCODE may be an integer, or a symbol whose name is a signal name.")
3104 Lisp_Object pid
, sigcode
;
3106 CHECK_NUMBER (pid
, 0);
3108 #define handle_signal(NAME, VALUE) \
3109 else if (!strcmp (name, NAME)) \
3110 XSETINT (sigcode, VALUE)
3112 if (INTEGERP (sigcode
))
3116 unsigned char *name
;
3118 CHECK_SYMBOL (sigcode
, 1);
3119 name
= XSYMBOL (sigcode
)->name
->data
;
3124 handle_signal ("SIGHUP", SIGHUP
);
3127 handle_signal ("SIGINT", SIGINT
);
3130 handle_signal ("SIGQUIT", SIGQUIT
);
3133 handle_signal ("SIGILL", SIGILL
);
3136 handle_signal ("SIGABRT", SIGABRT
);
3139 handle_signal ("SIGEMT", SIGEMT
);
3142 handle_signal ("SIGKILL", SIGKILL
);
3145 handle_signal ("SIGFPE", SIGFPE
);
3148 handle_signal ("SIGBUS", SIGBUS
);
3151 handle_signal ("SIGSEGV", SIGSEGV
);
3154 handle_signal ("SIGSYS", SIGSYS
);
3157 handle_signal ("SIGPIPE", SIGPIPE
);
3160 handle_signal ("SIGALRM", SIGALRM
);
3163 handle_signal ("SIGTERM", SIGTERM
);
3166 handle_signal ("SIGURG", SIGURG
);
3169 handle_signal ("SIGSTOP", SIGSTOP
);
3172 handle_signal ("SIGTSTP", SIGTSTP
);
3175 handle_signal ("SIGCONT", SIGCONT
);
3178 handle_signal ("SIGCHLD", SIGCHLD
);
3181 handle_signal ("SIGTTIN", SIGTTIN
);
3184 handle_signal ("SIGTTOU", SIGTTOU
);
3187 handle_signal ("SIGIO", SIGIO
);
3190 handle_signal ("SIGXCPU", SIGXCPU
);
3193 handle_signal ("SIGXFSZ", SIGXFSZ
);
3196 handle_signal ("SIGVTALRM", SIGVTALRM
);
3199 handle_signal ("SIGPROF", SIGPROF
);
3202 handle_signal ("SIGWINCH", SIGWINCH
);
3205 handle_signal ("SIGINFO", SIGINFO
);
3208 handle_signal ("SIGUSR1", SIGUSR1
);
3211 handle_signal ("SIGUSR2", SIGUSR2
);
3214 error ("Undefined signal name %s", name
);
3217 #undef handle_signal
3219 return make_number (kill (XINT (pid
), XINT (sigcode
)));
3222 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
3223 "Make PROCESS see end-of-file in its input.\n\
3224 Eof comes after any text already sent to it.\n\
3225 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3226 nil, indicating the current buffer's process.\n\
3227 If PROCESS is a network connection, or is a process communicating\n\
3228 through a pipe (as opposed to a pty), then you cannot send any more\n\
3229 text to PROCESS after you call this function.")
3231 Lisp_Object process
;
3235 proc
= get_process (process
);
3237 /* Make sure the process is really alive. */
3238 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3239 update_status (XPROCESS (proc
));
3240 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3241 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
3244 send_process (proc
, "\032", 1, Qnil
); /* ^z */
3246 if (!NILP (XPROCESS (proc
)->pty_flag
))
3247 send_process (proc
, "\004", 1, Qnil
);
3250 close (XINT (XPROCESS (proc
)->outfd
));
3251 XSETINT (XPROCESS (proc
)->outfd
, open (NULL_DEVICE
, O_WRONLY
));
3257 /* Kill all processes associated with `buffer'.
3258 If `buffer' is nil, kill all processes */
3260 kill_buffer_processes (buffer
)
3263 Lisp_Object tail
, proc
;
3265 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3267 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3268 if (GC_PROCESSP (proc
)
3269 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
3271 if (NETCONN_P (proc
))
3272 Fdelete_process (proc
);
3273 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
3274 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
3279 /* On receipt of a signal that a child status has changed,
3280 loop asking about children with changed statuses until
3281 the system says there are no more.
3282 All we do is change the status;
3283 we do not run sentinels or print notifications.
3284 That is saved for the next time keyboard input is done,
3285 in order to avoid timing errors. */
3287 /** WARNING: this can be called during garbage collection.
3288 Therefore, it must not be fooled by the presence of mark bits in
3291 /** USG WARNING: Although it is not obvious from the documentation
3292 in signal(2), on a USG system the SIGCLD handler MUST NOT call
3293 signal() before executing at least one wait(), otherwise the handler
3294 will be called again, resulting in an infinite loop. The relevant
3295 portion of the documentation reads "SIGCLD signals will be queued
3296 and the signal-catching function will be continually reentered until
3297 the queue is empty". Invoking signal() causes the kernel to reexamine
3298 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
3301 sigchld_handler (signo
)
3304 int old_errno
= errno
;
3306 register struct Lisp_Process
*p
;
3307 extern EMACS_TIME
*input_available_clear_time
;
3311 sigheld
|= sigbit (SIGCHLD
);
3323 #endif /* no WUNTRACED */
3324 /* Keep trying to get a status until we get a definitive result. */
3328 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
3330 while (pid
<= 0 && errno
== EINTR
);
3334 /* A real failure. We have done all our job, so return. */
3336 /* USG systems forget handlers when they are used;
3337 must reestablish each time */
3339 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
3342 sigheld
&= ~sigbit (SIGCHLD
);
3350 #endif /* no WNOHANG */
3352 /* Find the process that signaled us, and record its status. */
3355 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3357 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3358 p
= XPROCESS (proc
);
3359 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
3364 /* Look for an asynchronous process whose pid hasn't been filled
3367 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3369 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3370 p
= XPROCESS (proc
);
3371 if (INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
3376 /* Change the status of the process that was found. */
3379 union { int i
; WAITTYPE wt
; } u
;
3380 int clear_desc_flag
= 0;
3382 XSETINT (p
->tick
, ++process_tick
);
3384 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
3385 XSETINT (p
->raw_status_high
, u
.i
>> 16);
3387 /* If process has terminated, stop waiting for its output. */
3388 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
3389 && XINT (p
->infd
) >= 0)
3390 clear_desc_flag
= 1;
3392 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
3393 if (clear_desc_flag
)
3395 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
3396 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
3399 /* Tell wait_reading_process_input that it needs to wake up and
3401 if (input_available_clear_time
)
3402 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3405 /* There was no asynchronous process found for that id. Check
3406 if we have a synchronous process. */
3409 synch_process_alive
= 0;
3411 /* Report the status of the synchronous process. */
3413 synch_process_retcode
= WRETCODE (w
);
3414 else if (WIFSIGNALED (w
))
3416 int code
= WTERMSIG (w
);
3422 /* Suppress warning if the table has const char *. */
3423 signame
= (char *) sys_siglist
[code
];
3425 signame
= sys_errlist
[code
];
3429 signame
= "unknown";
3431 synch_process_death
= signame
;
3434 /* Tell wait_reading_process_input that it needs to wake up and
3436 if (input_available_clear_time
)
3437 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3440 /* On some systems, we must return right away.
3441 If any more processes want to signal us, we will
3443 Otherwise (on systems that have WNOHANG), loop around
3444 to use up all the processes that have something to tell us. */
3445 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT)
3447 signal (signo
, sigchld_handler
);
3451 #endif /* USG, but not HPUX with WNOHANG */
3457 exec_sentinel_unwind (data
)
3460 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
3465 exec_sentinel_error_handler (error
)
3468 cmd_error_internal (error
, "error in process sentinel: ");
3470 update_echo_area ();
3471 Fsleep_for (make_number (2), Qnil
);
3475 exec_sentinel (proc
, reason
)
3476 Lisp_Object proc
, reason
;
3478 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
3479 register struct Lisp_Process
*p
= XPROCESS (proc
);
3480 int count
= specpdl_ptr
- specpdl
;
3482 /* No need to gcpro these, because all we do with them later
3483 is test them for EQness, and none of them should be a string. */
3484 odeactivate
= Vdeactivate_mark
;
3485 XSETBUFFER (obuffer
, current_buffer
);
3486 okeymap
= current_buffer
->keymap
;
3488 sentinel
= p
->sentinel
;
3489 if (NILP (sentinel
))
3492 /* Zilch the sentinel while it's running, to avoid recursive invocations;
3493 assure that it gets restored no matter how the sentinel exits. */
3495 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
3496 /* Inhibit quit so that random quits don't screw up a running filter. */
3497 specbind (Qinhibit_quit
, Qt
);
3498 specbind (Qlast_nonmenu_event
, Qt
);
3500 running_asynch_code
= 1;
3501 internal_condition_case_1 (read_process_output_call
,
3503 Fcons (proc
, Fcons (reason
, Qnil
))),
3504 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
3505 exec_sentinel_error_handler
);
3506 running_asynch_code
= 0;
3507 restore_match_data ();
3509 Vdeactivate_mark
= odeactivate
;
3511 if (! EQ (Fcurrent_buffer (), obuffer
)
3512 || ! EQ (current_buffer
->keymap
, okeymap
))
3514 /* But do it only if the caller is actually going to read events.
3515 Otherwise there's no need to make him wake up, and it could
3516 cause trouble (for example it would make Fsit_for return). */
3517 if (waiting_for_user_input_p
== -1)
3518 record_asynch_buffer_change ();
3520 unbind_to (count
, Qnil
);
3523 /* Report all recent events of a change in process status
3524 (either run the sentinel or output a message).
3525 This is done while Emacs is waiting for keyboard input. */
3529 register Lisp_Object proc
, buffer
;
3530 Lisp_Object tail
, msg
;
3531 struct gcpro gcpro1
, gcpro2
;
3535 /* We need to gcpro tail; if read_process_output calls a filter
3536 which deletes a process and removes the cons to which tail points
3537 from Vprocess_alist, and then causes a GC, tail is an unprotected
3541 /* Set this now, so that if new processes are created by sentinels
3542 that we run, we get called again to handle their status changes. */
3543 update_tick
= process_tick
;
3545 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
3548 register struct Lisp_Process
*p
;
3550 proc
= Fcdr (Fcar (tail
));
3551 p
= XPROCESS (proc
);
3553 if (XINT (p
->tick
) != XINT (p
->update_tick
))
3555 XSETINT (p
->update_tick
, XINT (p
->tick
));
3557 /* If process is still active, read any output that remains. */
3558 if (XINT (p
->infd
) >= 0)
3559 while (! EQ (p
->filter
, Qt
)
3560 && read_process_output (proc
, XINT (p
->infd
)) > 0);
3564 /* Get the text to use for the message. */
3565 if (!NILP (p
->raw_status_low
))
3567 msg
= status_message (p
->status
);
3569 /* If process is terminated, deactivate it or delete it. */
3571 if (CONSP (p
->status
))
3572 symbol
= XCONS (p
->status
)->car
;
3574 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
3575 || EQ (symbol
, Qclosed
))
3577 if (delete_exited_processes
)
3578 remove_process (proc
);
3580 deactivate_process (proc
);
3583 /* Now output the message suitably. */
3584 if (!NILP (p
->sentinel
))
3585 exec_sentinel (proc
, msg
);
3586 /* Don't bother with a message in the buffer
3587 when a process becomes runnable. */
3588 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
3590 Lisp_Object ro
, tem
;
3591 struct buffer
*old
= current_buffer
;
3594 ro
= XBUFFER (buffer
)->read_only
;
3596 /* Avoid error if buffer is deleted
3597 (probably that's why the process is dead, too) */
3598 if (NILP (XBUFFER (buffer
)->name
))
3600 Fset_buffer (buffer
);
3602 /* Insert new output into buffer
3603 at the current end-of-output marker,
3604 thus preserving logical ordering of input and output. */
3605 if (XMARKER (p
->mark
)->buffer
)
3606 SET_PT (marker_position (p
->mark
));
3609 if (point
<= opoint
)
3610 opoint
+= XSTRING (msg
)->size
+ XSTRING (p
->name
)->size
+ 10;
3612 tem
= current_buffer
->read_only
;
3613 current_buffer
->read_only
= Qnil
;
3614 insert_string ("\nProcess ");
3615 Finsert (1, &p
->name
);
3616 insert_string (" ");
3618 current_buffer
->read_only
= tem
;
3619 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
3622 set_buffer_internal (old
);
3627 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
3628 redisplay_preserve_echo_area ();
3633 /* The first time this is called, assume keyboard input comes from DESC
3634 instead of from where we used to expect it.
3635 Subsequent calls mean assume input keyboard can come from DESC
3636 in addition to other places. */
3638 static int add_keyboard_wait_descriptor_called_flag
;
3641 add_keyboard_wait_descriptor (desc
)
3644 if (! add_keyboard_wait_descriptor_called_flag
)
3645 FD_CLR (0, &input_wait_mask
);
3646 add_keyboard_wait_descriptor_called_flag
= 1;
3647 FD_SET (desc
, &input_wait_mask
);
3648 if (desc
> max_keyboard_desc
)
3649 max_keyboard_desc
= desc
;
3652 /* From now on, do not expect DESC to give keyboard input. */
3655 delete_keyboard_wait_descriptor (desc
)
3659 int lim
= max_keyboard_desc
;
3661 FD_CLR (desc
, &input_wait_mask
);
3663 if (desc
== max_keyboard_desc
)
3664 for (fd
= 0; fd
< lim
; fd
++)
3665 if (FD_ISSET (fd
, &input_wait_mask
)
3666 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3667 max_keyboard_desc
= fd
;
3670 /* Return nonzero if *MASK has a bit set
3671 that corresponds to one of the keyboard input descriptors. */
3674 keyboard_bit_set (mask
)
3679 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
3680 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
3681 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
3693 if (! noninteractive
|| initialized
)
3695 signal (SIGCHLD
, sigchld_handler
);
3698 FD_ZERO (&input_wait_mask
);
3699 FD_ZERO (&non_keyboard_wait_mask
);
3700 max_process_desc
= 0;
3702 FD_SET (0, &input_wait_mask
);
3704 Vprocess_alist
= Qnil
;
3705 for (i
= 0; i
< MAXDESC
; i
++)
3707 chan_process
[i
] = Qnil
;
3708 proc_buffered_char
[i
] = -1;
3715 stream_process
= intern ("stream");
3717 Qprocessp
= intern ("processp");
3718 staticpro (&Qprocessp
);
3719 Qrun
= intern ("run");
3721 Qstop
= intern ("stop");
3723 Qsignal
= intern ("signal");
3724 staticpro (&Qsignal
);
3726 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
3729 Qexit = intern ("exit");
3730 staticpro (&Qexit); */
3732 Qopen
= intern ("open");
3734 Qclosed
= intern ("closed");
3735 staticpro (&Qclosed
);
3737 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
3738 staticpro (&Qlast_nonmenu_event
);
3740 staticpro (&Vprocess_alist
);
3742 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
3743 "*Non-nil means delete processes immediately when they exit.\n\
3744 nil means don't delete them until `list-processes' is run.");
3746 delete_exited_processes
= 1;
3748 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
3749 "Control type of device used to communicate with subprocesses.\n\
3750 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
3751 The value has no effect if the system has no ptys or if all ptys are busy:\n\
3752 then a pipe is used in any case.\n\
3753 The value takes effect when `start-process' is called.");
3754 Vprocess_connection_type
= Qt
;
3756 defsubr (&Sprocessp
);
3757 defsubr (&Sget_process
);
3758 defsubr (&Sget_buffer_process
);
3759 defsubr (&Sdelete_process
);
3760 defsubr (&Sprocess_status
);
3761 defsubr (&Sprocess_exit_status
);
3762 defsubr (&Sprocess_id
);
3763 defsubr (&Sprocess_name
);
3764 defsubr (&Sprocess_tty_name
);
3765 defsubr (&Sprocess_command
);
3766 defsubr (&Sset_process_buffer
);
3767 defsubr (&Sprocess_buffer
);
3768 defsubr (&Sprocess_mark
);
3769 defsubr (&Sset_process_filter
);
3770 defsubr (&Sprocess_filter
);
3771 defsubr (&Sset_process_sentinel
);
3772 defsubr (&Sset_process_window_size
);
3773 defsubr (&Sprocess_sentinel
);
3774 defsubr (&Sprocess_kill_without_query
);
3775 defsubr (&Slist_processes
);
3776 defsubr (&Sprocess_list
);
3777 defsubr (&Sstart_process
);
3779 defsubr (&Sopen_network_stream
);
3780 #endif /* HAVE_SOCKETS */
3781 defsubr (&Saccept_process_output
);
3782 defsubr (&Sprocess_send_region
);
3783 defsubr (&Sprocess_send_string
);
3784 defsubr (&Sinterrupt_process
);
3785 defsubr (&Skill_process
);
3786 defsubr (&Squit_process
);
3787 defsubr (&Sstop_process
);
3788 defsubr (&Scontinue_process
);
3789 defsubr (&Sprocess_send_eof
);
3790 defsubr (&Ssignal_process
);
3791 defsubr (&Swaiting_for_user_input_p
);
3792 /* defsubr (&Sprocess_connection); */
3796 #else /* not subprocesses */
3798 #include <sys/types.h>
3802 #include "systime.h"
3803 #include "termopts.h"
3804 #include "sysselect.h"
3806 extern int frame_garbaged
;
3808 extern EMACS_TIME
timer_check ();
3809 extern int timers_run
;
3811 /* As described above, except assuming that there are no subprocesses:
3813 Wait for timeout to elapse and/or keyboard input to be available.
3816 timeout in seconds, or
3817 zero for no limit, or
3818 -1 means gobble data immediately available but don't wait for any.
3820 read_kbd is a Lisp_Object:
3821 0 to ignore keyboard input, or
3822 1 to return when input is available, or
3823 -1 means caller will actually read the input, so don't throw to
3825 a cons cell, meaning wait until its car is non-nil
3826 (and gobble terminal input into the buffer if any arrives), or
3827 We know that read_kbd will never be a Lisp_Process, since
3828 `subprocesses' isn't defined.
3830 do_display != 0 means redisplay should be done to show subprocess
3831 output that arrives.
3833 Return true iff we received input from any process. */
3836 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
3837 int time_limit
, microsecs
;
3838 Lisp_Object read_kbd
;
3841 EMACS_TIME end_time
, timeout
;
3842 SELECT_TYPE waitchannels
;
3844 Lisp_Object
*wait_for_cell
= 0;
3846 /* If waiting for non-nil in a cell, record where. */
3847 if (CONSP (read_kbd
))
3849 wait_for_cell
= &XCONS (read_kbd
)->car
;
3850 XSETFASTINT (read_kbd
, 0);
3853 /* What does time_limit really mean? */
3854 if (time_limit
|| microsecs
)
3856 if (time_limit
== -1)
3857 /* In fact, it's zero. */
3858 EMACS_SET_SECS_USECS (timeout
, 0, 0);
3860 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
3862 /* How far in the future is that? */
3863 EMACS_GET_TIME (end_time
);
3864 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
3867 /* It's infinite. */
3868 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
3870 /* Turn off periodic alarms (in case they are in use)
3871 because the select emulator uses alarms. */
3877 int timeout_reduced_for_timers
= 0;
3879 /* If calling from keyboard input, do not quit
3880 since we want to return C-g as an input character.
3881 Otherwise, do pending quit if requested. */
3882 if (XINT (read_kbd
) >= 0)
3885 /* Exit now if the cell we're waiting for became non-nil. */
3886 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
3889 /* Compute time from now till when time limit is up */
3890 /* Exit if already run out */
3891 if (time_limit
> 0 || microsecs
)
3893 EMACS_GET_TIME (timeout
);
3894 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
3895 if (EMACS_TIME_NEG_P (timeout
))
3899 /* If our caller will not immediately handle keyboard events,
3900 run timer events directly.
3901 (Callers that will immediately read keyboard events
3902 call timer_delay on their own.) */
3903 if (! wait_for_cell
)
3905 EMACS_TIME timer_delay
;
3909 old_timers_run
= timers_run
;
3910 timer_delay
= timer_check (1);
3911 if (timers_run
!= old_timers_run
&& do_display
)
3913 redisplay_preserve_echo_area ();
3914 /* We must retry, since a timer may have requeued itself
3915 and that could alter the time delay. */
3919 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
3921 EMACS_TIME difference
;
3922 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
3923 if (EMACS_TIME_NEG_P (difference
))
3925 timeout
= timer_delay
;
3926 timeout_reduced_for_timers
= 1;
3931 /* Cause C-g and alarm signals to take immediate action,
3932 and cause input available signals to zero out timeout. */
3933 if (XINT (read_kbd
) < 0)
3934 set_waiting_for_input (&timeout
);
3936 /* Wait till there is something to do. */
3938 if (! XINT (read_kbd
) && wait_for_cell
== 0)
3939 FD_ZERO (&waitchannels
);
3941 FD_SET (0, &waitchannels
);
3943 /* If a frame has been newly mapped and needs updating,
3944 reprocess its display stuff. */
3945 if (frame_garbaged
&& do_display
)
3947 clear_waiting_for_input ();
3948 redisplay_preserve_echo_area ();
3949 if (XINT (read_kbd
) < 0)
3950 set_waiting_for_input (&timeout
);
3953 if (XINT (read_kbd
) && detect_input_pending ())
3956 FD_ZERO (&waitchannels
);
3959 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
3964 /* Make C-g and alarm signals set flags again */
3965 clear_waiting_for_input ();
3967 /* If we woke up due to SIGWINCH, actually change size now. */
3968 do_pending_window_change ();
3970 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
3971 /* We waited the full specified time, so return now. */
3976 /* If the system call was interrupted, then go around the
3978 if (xerrno
== EINTR
)
3979 FD_ZERO (&waitchannels
);
3981 error ("select error: %s", strerror (xerrno
));
3984 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
3985 /* System sometimes fails to deliver SIGIO. */
3986 kill (getpid (), SIGIO
);
3989 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
3990 kill (getpid (), SIGIO
);
3993 /* Check for keyboard input */
3995 if ((XINT (read_kbd
) != 0)
3996 && detect_input_pending_run_timers (do_display
))
3998 swallow_events (do_display
);
3999 if (detect_input_pending_run_timers (do_display
))
4003 /* If wait_for_cell. check for keyboard input
4004 but don't run any timers.
4005 ??? (It seems wrong to me to check for keyboard
4006 input at all when wait_for_cell, but the code
4007 has been this way since July 1994.
4008 Try changing this after version 19.31.) */
4010 && detect_input_pending ())
4012 swallow_events (do_display
);
4013 if (detect_input_pending ())
4017 /* Exit now if the cell we're waiting for became non-nil. */
4018 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
4028 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
4029 /* Don't confuse make-docfile by having two doc strings for this function.
4030 make-docfile does not pay attention to #if, for good reason! */
4033 register Lisp_Object name
;
4038 /* Kill all processes associated with `buffer'.
4039 If `buffer' is nil, kill all processes.
4040 Since we have no subprocesses, this does nothing. */
4042 kill_buffer_processes (buffer
)
4053 defsubr (&Sget_buffer_process
);
4057 #endif /* not subprocesses */