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_SYSTEM) || 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_SYSTEM || STRIDE */
83 #ifdef BROKEN_O_NONBLOCK
85 #endif /* BROKEN_O_NONBLOCK */
92 #include <sys/sysmacros.h> /* for "minor" */
104 #include "termhooks.h"
105 #include "termopts.h"
106 #include "commands.h"
108 #include "blockinput.h"
110 Lisp_Object Qprocessp
;
111 Lisp_Object Qrun
, Qstop
, Qsignal
, Qopen
, Qclosed
;
112 Lisp_Object Qlast_nonmenu_event
;
113 /* Qexit is declared and initialized in eval.c. */
115 /* a process object is a network connection when its childp field is neither
116 Qt nor Qnil but is instead a cons cell (HOSTNAME PORTNUM). */
119 #define NETCONN_P(p) (GC_CONSP (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 /* Mask that excludes process input descriptor (s). */
229 static SELECT_TYPE non_process_wait_mask
;
231 /* The largest descriptor currently in use for a process object. */
232 static int max_process_desc
;
234 /* The largest descriptor currently in use for keyboard input. */
235 static int max_keyboard_desc
;
237 /* Nonzero means delete a process right away if it exits. */
238 static int delete_exited_processes
;
240 /* Indexed by descriptor, gives the process (if any) for that descriptor */
241 Lisp_Object chan_process
[MAXDESC
];
243 /* Alist of elements (NAME . PROCESS) */
244 Lisp_Object Vprocess_alist
;
246 /* Buffered-ahead input char from process, indexed by channel.
247 -1 means empty (no char is buffered).
248 Used on sys V where the only way to tell if there is any
249 output from the process is to read at least one char.
250 Always -1 on systems that support FIONREAD. */
252 /* Don't make static; need to access externally. */
253 int proc_buffered_char
[MAXDESC
];
255 /* Table of `struct coding-system' for each process. */
256 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
257 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
259 static Lisp_Object
get_process ();
261 extern EMACS_TIME
timer_check ();
262 extern int timers_run
;
264 /* Maximum number of bytes to send to a pty without an eof. */
265 static int pty_max_bytes
;
268 /* The file name of the pty opened by allocate_pty. */
270 static char pty_name
[24];
273 /* Compute the Lisp form of the process status, p->status, from
274 the numeric status that was returned by `wait'. */
276 Lisp_Object
status_convert ();
279 struct Lisp_Process
*p
;
281 union { int i
; WAITTYPE wt
; } u
;
282 u
.i
= XFASTINT (p
->raw_status_low
) + (XFASTINT (p
->raw_status_high
) << 16);
283 p
->status
= status_convert (u
.wt
);
284 p
->raw_status_low
= Qnil
;
285 p
->raw_status_high
= Qnil
;
288 /* Convert a process status word in Unix format to
289 the list that we use internally. */
296 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
297 else if (WIFEXITED (w
))
298 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
299 WCOREDUMP (w
) ? Qt
: Qnil
));
300 else if (WIFSIGNALED (w
))
301 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
302 WCOREDUMP (w
) ? Qt
: Qnil
));
307 /* Given a status-list, extract the three pieces of information
308 and store them individually through the three pointers. */
311 decode_status (l
, symbol
, code
, coredump
)
327 *symbol
= XCONS (l
)->car
;
328 tem
= XCONS (l
)->cdr
;
329 *code
= XFASTINT (XCONS (tem
)->car
);
330 tem
= XCONS (tem
)->cdr
;
331 *coredump
= !NILP (tem
);
335 /* Return a string describing a process status list. */
338 status_message (status
)
343 Lisp_Object string
, string2
;
345 decode_status (status
, &symbol
, &code
, &coredump
);
347 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
353 /* Cast to suppress warning if the table has const char *. */
354 signame
= (char *) sys_siglist
[code
];
356 signame
= sys_errlist
[code
];
361 string
= build_string (signame
);
362 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
363 XSTRING (string
)->data
[0] = DOWNCASE (XSTRING (string
)->data
[0]);
364 return concat2 (string
, string2
);
366 else if (EQ (symbol
, Qexit
))
369 return build_string ("finished\n");
370 string
= Fnumber_to_string (make_number (code
));
371 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
372 return concat2 (build_string ("exited abnormally with code "),
373 concat2 (string
, string2
));
376 return Fcopy_sequence (Fsymbol_name (symbol
));
381 /* Open an available pty, returning a file descriptor.
382 Return -1 on failure.
383 The file name of the terminal corresponding to the pty
384 is left in the variable pty_name. */
393 /* Some systems name their pseudoterminals so that there are gaps in
394 the usual sequence - for example, on HP9000/S700 systems, there
395 are no pseudoterminals with names ending in 'f'. So we wait for
396 three failures in a row before deciding that we've reached the
398 int failed_count
= 0;
403 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
404 for (i
= 0; i
< 16; i
++)
407 #ifdef PTY_NAME_SPRINTF
410 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
411 #endif /* no PTY_NAME_SPRINTF */
415 #else /* no PTY_OPEN */
417 /* Unusual IRIS code */
418 *ptyv
= open ("/dev/ptc", O_RDWR
| O_NDELAY
, 0);
421 if (fstat (fd
, &stb
) < 0)
424 if (stat (pty_name
, &stb
) < 0)
427 if (failed_count
>= 3)
433 fd
= open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
435 fd
= open (pty_name
, O_RDWR
| O_NDELAY
, 0);
437 #endif /* not IRIS */
438 #endif /* no PTY_OPEN */
442 /* check to make certain that both sides are available
443 this avoids a nasty yet stupid bug in rlogins */
444 #ifdef PTY_TTY_NAME_SPRINTF
447 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
448 #endif /* no PTY_TTY_NAME_SPRINTF */
450 if (access (pty_name
, 6) != 0)
453 #if !defined(IRIS) && !defined(__sgi)
459 #endif /* not UNIPLUS */
466 #endif /* HAVE_PTYS */
472 struct Lisp_Vector
*vec
;
473 register Lisp_Object val
, tem
, name1
;
474 register struct Lisp_Process
*p
;
478 vec
= allocate_vectorlike ((EMACS_INT
) VECSIZE (struct Lisp_Process
));
479 for (i
= 0; i
< VECSIZE (struct Lisp_Process
); i
++)
480 vec
->contents
[i
] = Qnil
;
481 vec
->size
= VECSIZE (struct Lisp_Process
);
482 p
= (struct Lisp_Process
*)vec
;
484 XSETINT (p
->infd
, -1);
485 XSETINT (p
->outfd
, -1);
486 XSETFASTINT (p
->pid
, 0);
487 XSETFASTINT (p
->tick
, 0);
488 XSETFASTINT (p
->update_tick
, 0);
489 p
->raw_status_low
= Qnil
;
490 p
->raw_status_high
= Qnil
;
492 p
->mark
= Fmake_marker ();
494 /* If name is already in use, modify it until it is unused. */
499 tem
= Fget_process (name1
);
500 if (NILP (tem
)) break;
501 sprintf (suffix
, "<%d>", i
);
502 name1
= concat2 (name
, build_string (suffix
));
506 XSETPROCESS (val
, p
);
507 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
511 remove_process (proc
)
512 register Lisp_Object proc
;
514 register Lisp_Object pair
;
516 pair
= Frassq (proc
, Vprocess_alist
);
517 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
519 deactivate_process (proc
);
522 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
523 "Return t if OBJECT is a process.")
527 return PROCESSP (object
) ? Qt
: Qnil
;
530 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
531 "Return the process named NAME, or nil if there is none.")
533 register Lisp_Object name
;
537 CHECK_STRING (name
, 0);
538 return Fcdr (Fassoc (name
, Vprocess_alist
));
541 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
542 "Return the (or, a) process associated with BUFFER.\n\
543 BUFFER may be a buffer or the name of one.")
545 register Lisp_Object buffer
;
547 register Lisp_Object buf
, tail
, proc
;
549 if (NILP (buffer
)) return Qnil
;
550 buf
= Fget_buffer (buffer
);
551 if (NILP (buf
)) return Qnil
;
553 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
555 proc
= Fcdr (Fcar (tail
));
556 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
562 /* This is how commands for the user decode process arguments. It
563 accepts a process, a process name, a buffer, a buffer name, or nil.
564 Buffers denote the first process in the buffer, and nil denotes the
569 register Lisp_Object name
;
571 register Lisp_Object proc
, obj
;
574 obj
= Fget_process (name
);
576 obj
= Fget_buffer (name
);
578 error ("Process %s does not exist", XSTRING (name
)->data
);
580 else if (NILP (name
))
581 obj
= Fcurrent_buffer ();
585 /* Now obj should be either a buffer object or a process object.
589 proc
= Fget_buffer_process (obj
);
591 error ("Buffer %s has no process", XSTRING (XBUFFER (obj
)->name
)->data
);
595 CHECK_PROCESS (obj
, 0);
601 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
602 "Delete PROCESS: kill it and forget about it immediately.\n\
603 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
604 nil, indicating the current buffer's process.")
606 register Lisp_Object process
;
608 process
= get_process (process
);
609 XPROCESS (process
)->raw_status_low
= Qnil
;
610 XPROCESS (process
)->raw_status_high
= Qnil
;
611 if (NETCONN_P (process
))
613 XPROCESS (process
)->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
614 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
616 else if (XINT (XPROCESS (process
)->infd
) >= 0)
618 Fkill_process (process
, Qnil
);
619 /* Do this now, since remove_process will make sigchld_handler do nothing. */
620 XPROCESS (process
)->status
621 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
622 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
625 remove_process (process
);
629 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
630 "Return the status of PROCESS: a symbol, one of these:\n\
631 run -- for a process that is running.\n\
632 stop -- for a process stopped but continuable.\n\
633 exit -- for a process that has exited.\n\
634 signal -- for a process that has got a fatal signal.\n\
635 open -- for a network stream connection that is open.\n\
636 closed -- for a network stream connection that is closed.\n\
637 nil -- if arg is a process name and no such process exists.\n\
638 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
639 nil, indicating the current buffer's process.")
641 register Lisp_Object process
;
643 register struct Lisp_Process
*p
;
644 register Lisp_Object status
;
646 if (STRINGP (process
))
647 process
= Fget_process (process
);
649 process
= get_process (process
);
654 p
= XPROCESS (process
);
655 if (!NILP (p
->raw_status_low
))
659 status
= XCONS (status
)->car
;
660 if (NETCONN_P (process
))
662 if (EQ (status
, Qrun
))
664 else if (EQ (status
, Qexit
))
670 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
672 "Return the exit status of PROCESS or the signal number that killed it.\n\
673 If PROCESS has not yet exited or died, return 0.")
675 register Lisp_Object process
;
677 CHECK_PROCESS (process
, 0);
678 if (!NILP (XPROCESS (process
)->raw_status_low
))
679 update_status (XPROCESS (process
));
680 if (CONSP (XPROCESS (process
)->status
))
681 return XCONS (XCONS (XPROCESS (process
)->status
)->cdr
)->car
;
682 return make_number (0);
685 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
686 "Return the process id of PROCESS.\n\
687 This is the pid of the Unix process which PROCESS uses or talks to.\n\
688 For a network connection, this value is nil.")
690 register Lisp_Object process
;
692 CHECK_PROCESS (process
, 0);
693 return XPROCESS (process
)->pid
;
696 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
697 "Return the name of PROCESS, as a string.\n\
698 This is the name of the program invoked in PROCESS,\n\
699 possibly modified to make it unique among process names.")
701 register Lisp_Object process
;
703 CHECK_PROCESS (process
, 0);
704 return XPROCESS (process
)->name
;
707 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
708 "Return the command that was executed to start PROCESS.\n\
709 This is a list of strings, the first string being the program executed\n\
710 and the rest of the strings being the arguments given to it.\n\
711 For a non-child channel, this is nil.")
713 register Lisp_Object process
;
715 CHECK_PROCESS (process
, 0);
716 return XPROCESS (process
)->command
;
719 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
720 "Return the name of the terminal PROCESS uses, or nil if none.\n\
721 This is the terminal that the process itself reads and writes on,\n\
722 not the name of the pty that Emacs uses to talk with that terminal.")
724 register Lisp_Object process
;
726 CHECK_PROCESS (process
, 0);
727 return XPROCESS (process
)->tty_name
;
730 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
732 "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).")
734 register Lisp_Object process
, buffer
;
736 CHECK_PROCESS (process
, 0);
738 CHECK_BUFFER (buffer
, 1);
739 XPROCESS (process
)->buffer
= buffer
;
743 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
745 "Return the buffer PROCESS is associated with.\n\
746 Output from PROCESS is inserted in this buffer\n\
747 unless PROCESS has a filter.")
749 register Lisp_Object process
;
751 CHECK_PROCESS (process
, 0);
752 return XPROCESS (process
)->buffer
;
755 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
757 "Return the marker for the end of the last output from PROCESS.")
759 register Lisp_Object process
;
761 CHECK_PROCESS (process
, 0);
762 return XPROCESS (process
)->mark
;
765 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
767 "Give PROCESS the filter function FILTER; nil means no filter.\n\
768 t means stop accepting output from the process.\n\
769 When a process has a filter, each time it does output\n\
770 the entire string of output is passed to the filter.\n\
771 The filter gets two arguments: the process and the string of output.\n\
772 If the process has a filter, its buffer is not used for output.")
774 register Lisp_Object process
, filter
;
776 CHECK_PROCESS (process
, 0);
779 FD_CLR (XINT (XPROCESS (process
)->infd
), &input_wait_mask
);
780 FD_CLR (XINT (XPROCESS (process
)->infd
), &non_keyboard_wait_mask
);
782 else if (EQ (XPROCESS (process
)->filter
, Qt
))
784 FD_SET (XINT (XPROCESS (process
)->infd
), &input_wait_mask
);
785 FD_SET (XINT (XPROCESS (process
)->infd
), &non_keyboard_wait_mask
);
787 XPROCESS (process
)->filter
= filter
;
791 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
793 "Returns the filter function of PROCESS; nil if none.\n\
794 See `set-process-filter' for more info on filter functions.")
796 register Lisp_Object process
;
798 CHECK_PROCESS (process
, 0);
799 return XPROCESS (process
)->filter
;
802 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
804 "Give PROCESS the sentinel SENTINEL; nil for none.\n\
805 The sentinel is called as a function when the process changes state.\n\
806 It gets two arguments: the process, and a string describing the change.")
808 register Lisp_Object process
, sentinel
;
810 CHECK_PROCESS (process
, 0);
811 XPROCESS (process
)->sentinel
= sentinel
;
815 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
817 "Return the sentinel of PROCESS; nil if none.\n\
818 See `set-process-sentinel' for more info on sentinels.")
820 register Lisp_Object process
;
822 CHECK_PROCESS (process
, 0);
823 return XPROCESS (process
)->sentinel
;
826 DEFUN ("set-process-window-size", Fset_process_window_size
,
827 Sset_process_window_size
, 3, 3, 0,
828 "Tell PROCESS that it has logical window size HEIGHT and WIDTH.")
829 (process
, height
, width
)
830 register Lisp_Object process
, height
, width
;
832 CHECK_PROCESS (process
, 0);
833 CHECK_NATNUM (height
, 0);
834 CHECK_NATNUM (width
, 0);
835 if (set_window_size (XINT (XPROCESS (process
)->infd
),
836 XINT (height
), XINT(width
)) <= 0)
842 DEFUN ("process-kill-without-query", Fprocess_kill_without_query
,
843 Sprocess_kill_without_query
, 1, 2, 0,
844 "Say no query needed if PROCESS is running when Emacs is exited.\n\
845 Optional second argument if non-nil says to require a query.\n\
846 Value is t if a query was formerly required.")
848 register Lisp_Object process
, value
;
852 CHECK_PROCESS (process
, 0);
853 tem
= XPROCESS (process
)->kill_without_query
;
854 XPROCESS (process
)->kill_without_query
= Fnull (value
);
859 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
861 "Return the contact info of PROCESS; t for a real child.\n\
862 For a net connection, the value is a cons cell of the form (HOST SERVICE).")
864 register Lisp_Object process
;
866 CHECK_PROCESS (process
, 0);
867 return XPROCESS (process
)->childp
;
870 #if 0 /* Turned off because we don't currently record this info
871 in the process. Perhaps add it. */
872 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
873 "Return the connection type of `PROCESS'.\n\
874 The value is `nil' for a pipe,\n\
875 `t' or `pty' for a pty, or `stream' for a socket connection.")
879 return XPROCESS (process
)->type
;
886 register Lisp_Object tail
, tem
;
887 Lisp_Object proc
, minspace
, tem1
;
888 register struct buffer
*old
= current_buffer
;
889 register struct Lisp_Process
*p
;
893 XSETFASTINT (minspace
, 1);
895 set_buffer_internal (XBUFFER (Vstandard_output
));
896 Fbuffer_disable_undo (Vstandard_output
);
898 current_buffer
->truncate_lines
= Qt
;
901 Proc Status Buffer Tty Command\n\
902 ---- ------ ------ --- -------\n", -1);
904 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
908 proc
= Fcdr (Fcar (tail
));
910 if (NILP (p
->childp
))
913 Finsert (1, &p
->name
);
914 Findent_to (make_number (13), minspace
);
916 if (!NILP (p
->raw_status_low
))
919 if (CONSP (p
->status
))
920 symbol
= XCONS (p
->status
)->car
;
923 if (EQ (symbol
, Qsignal
))
926 tem
= Fcar (Fcdr (p
->status
));
928 if (XINT (tem
) < NSIG
)
929 write_string (sys_errlist
[XINT (tem
)], -1);
932 Fprinc (symbol
, Qnil
);
934 else if (NETCONN_P (proc
))
936 if (EQ (symbol
, Qrun
))
937 write_string ("open", -1);
938 else if (EQ (symbol
, Qexit
))
939 write_string ("closed", -1);
941 Fprinc (symbol
, Qnil
);
944 Fprinc (symbol
, Qnil
);
946 if (EQ (symbol
, Qexit
))
949 tem
= Fcar (Fcdr (p
->status
));
952 sprintf (tembuf
, " %d", (int) XFASTINT (tem
));
953 write_string (tembuf
, -1);
957 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
958 remove_process (proc
);
960 Findent_to (make_number (22), minspace
);
961 if (NILP (p
->buffer
))
962 insert_string ("(none)");
963 else if (NILP (XBUFFER (p
->buffer
)->name
))
964 insert_string ("(Killed)");
966 Finsert (1, &XBUFFER (p
->buffer
)->name
);
968 Findent_to (make_number (37), minspace
);
970 if (STRINGP (p
->tty_name
))
971 Finsert (1, &p
->tty_name
);
973 insert_string ("(none)");
975 Findent_to (make_number (49), minspace
);
977 if (NETCONN_P (proc
))
979 sprintf (tembuf
, "(network stream connection to %s)\n",
980 XSTRING (XCONS (p
->childp
)->car
)->data
);
981 insert_string (tembuf
);
995 insert_string ("\n");
1001 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 0, "",
1002 "Display a list of all processes.\n\
1003 \(Any processes listed as Exited or Signaled are actually eliminated\n\
1004 after the listing is made.)")
1007 internal_with_output_to_temp_buffer ("*Process List*",
1008 list_processes_1
, Qnil
);
1012 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1013 "Return a list of all processes.")
1016 return Fmapcar (Qcdr
, Vprocess_alist
);
1019 /* Starting asynchronous inferior processes. */
1021 static Lisp_Object
start_process_unwind ();
1023 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1024 "Start a program in a subprocess. Return the process object for it.\n\
1025 Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\
1026 NAME is name for process. It is modified if necessary to make it unique.\n\
1027 BUFFER is the buffer or (buffer-name) to associate with the process.\n\
1028 Process output goes at end of that buffer, unless you specify\n\
1029 an output stream or filter function to handle the output.\n\
1030 BUFFER may be also nil, meaning that this process is not associated\n\
1032 Third arg is program file name. It is searched for as in the shell.\n\
1033 Remaining arguments are strings to give program as arguments.")
1036 register Lisp_Object
*args
;
1038 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1040 register unsigned char *new_argv
;
1043 register unsigned char **new_argv
;
1046 int count
= specpdl_ptr
- specpdl
;
1050 buffer
= Fget_buffer_create (buffer
);
1052 /* Make sure that the child will be able to chdir to the current
1053 buffer's current directory, or its unhandled equivalent. We
1054 can't just have the child check for an error when it does the
1055 chdir, since it's in a vfork.
1057 We have to GCPRO around this because Fexpand_file_name and
1058 Funhandled_file_name_directory might call a file name handling
1059 function. The argument list is protected by the caller, so all
1060 we really have to worry about is buffer. */
1062 struct gcpro gcpro1
, gcpro2
;
1064 current_dir
= current_buffer
->directory
;
1066 GCPRO2 (buffer
, current_dir
);
1069 = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir
),
1071 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1072 report_file_error ("Setting current directory",
1073 Fcons (current_buffer
->directory
, Qnil
));
1079 CHECK_STRING (name
, 0);
1083 CHECK_STRING (program
, 2);
1086 /* Make a one member argv with all args concatenated
1087 together separated by a blank. */
1088 len
= XSTRING (program
)->size
+ 2;
1089 for (i
= 3; i
< nargs
; i
++)
1092 CHECK_STRING (tem
, i
);
1093 len
+= XSTRING (tem
)->size
+ 1; /* count the blank */
1095 new_argv
= (unsigned char *) alloca (len
);
1096 strcpy (new_argv
, XSTRING (program
)->data
);
1097 for (i
= 3; i
< nargs
; i
++)
1100 CHECK_STRING (tem
, i
);
1101 strcat (new_argv
, " ");
1102 strcat (new_argv
, XSTRING (tem
)->data
);
1104 /* Need to add code here to check for program existence on VMS */
1107 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1109 /* If program file name is not absolute, search our path for it */
1110 if (!IS_DIRECTORY_SEP (XSTRING (program
)->data
[0])
1111 && !(XSTRING (program
)->size
> 1
1112 && IS_DEVICE_SEP (XSTRING (program
)->data
[1])))
1114 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1117 GCPRO4 (name
, program
, buffer
, current_dir
);
1118 openp (Vexec_path
, program
, EXEC_SUFFIXES
, &tem
, 1);
1121 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1122 tem
= Fexpand_file_name (tem
, Qnil
);
1123 new_argv
[0] = XSTRING (tem
)->data
;
1127 if (!NILP (Ffile_directory_p (program
)))
1128 error ("Specified program for new process is a directory");
1130 new_argv
[0] = XSTRING (program
)->data
;
1133 for (i
= 3; i
< nargs
; i
++)
1136 CHECK_STRING (tem
, i
);
1137 new_argv
[i
- 2] = XSTRING (tem
)->data
;
1139 new_argv
[i
- 2] = 0;
1140 #endif /* not VMS */
1142 proc
= make_process (name
);
1143 /* If an error occurs and we can't start the process, we want to
1144 remove it from the process list. This means that each error
1145 check in create_process doesn't need to call remove_process
1146 itself; it's all taken care of here. */
1147 record_unwind_protect (start_process_unwind
, proc
);
1149 XPROCESS (proc
)->childp
= Qt
;
1150 XPROCESS (proc
)->command_channel_p
= Qnil
;
1151 XPROCESS (proc
)->buffer
= buffer
;
1152 XPROCESS (proc
)->sentinel
= Qnil
;
1153 XPROCESS (proc
)->filter
= Qnil
;
1154 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1156 /* Make the process marker point into the process buffer (if any). */
1158 Fset_marker (XPROCESS (proc
)->mark
,
1159 make_number (BUF_ZV (XBUFFER (buffer
))), buffer
);
1161 if (!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
)
1162 || NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
))
1164 XPROCESS (proc
)->decode_coding_system
= Qnil
;
1165 XPROCESS (proc
)->encode_coding_system
= Qnil
;
1169 /* Setup coding systems for communicating with the process. */
1170 /* Qt denotes that we have not yet called Ffind_coding_system. */
1171 Lisp_Object coding_systems
= Qt
;
1172 Lisp_Object val
, *args2
;
1173 struct gcpro gcpro1
;
1175 if (NILP (val
= Vcoding_system_for_read
))
1177 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1178 args2
[0] = Qstart_process
;
1179 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1181 coding_systems
= Ffind_coding_system (nargs
+ 1, args2
);
1183 if (CONSP (coding_systems
))
1184 val
= XCONS (coding_systems
)->car
;
1185 else if (CONSP (Vdefault_process_coding_system
))
1186 val
= XCONS (Vdefault_process_coding_system
)->car
;
1188 XPROCESS (proc
)->decode_coding_system
= val
;
1190 if (NILP (val
= Vcoding_system_for_write
))
1192 if (EQ (coding_systems
, Qt
))
1194 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof args2
);
1195 args2
[0] = Qstart_process
;
1196 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1198 coding_systems
= Ffind_coding_system (nargs
+ 1, args2
);
1201 if (CONSP (coding_systems
))
1202 val
= XCONS (coding_systems
)->cdr
;
1203 else if (CONSP (Vdefault_process_coding_system
))
1204 val
= XCONS (Vdefault_process_coding_system
)->cdr
;
1206 XPROCESS (proc
)->encode_coding_system
= val
;
1209 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
1210 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
1212 create_process (proc
, new_argv
, current_dir
);
1214 return unbind_to (count
, proc
);
1217 /* This function is the unwind_protect form for Fstart_process. If
1218 PROC doesn't have its pid set, then we know someone has signaled
1219 an error and the process wasn't started successfully, so we should
1220 remove it from the process list. */
1222 start_process_unwind (proc
)
1225 if (!PROCESSP (proc
))
1228 /* Was PROC started successfully? */
1229 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1230 remove_process (proc
);
1237 create_process_1 (signo
)
1240 #if defined (USG) && !defined (POSIX_SIGNALS)
1241 /* USG systems forget handlers when they are used;
1242 must reestablish each time */
1243 signal (signo
, create_process_1
);
1247 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1250 /* Mimic blocking of signals on system V, which doesn't really have it. */
1252 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1253 int sigchld_deferred
;
1256 create_process_sigchld ()
1258 signal (SIGCHLD
, create_process_sigchld
);
1260 sigchld_deferred
= 1;
1266 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1267 create_process (process
, new_argv
, current_dir
)
1268 Lisp_Object process
;
1270 Lisp_Object current_dir
;
1272 int pid
, inchannel
, outchannel
;
1274 #ifdef POSIX_SIGNALS
1277 struct sigaction sigint_action
;
1278 struct sigaction sigquit_action
;
1280 struct sigaction sighup_action
;
1282 #else /* !POSIX_SIGNALS */
1284 SIGTYPE (*sigchld
)();
1286 #endif /* !POSIX_SIGNALS */
1287 /* Use volatile to protect variables from being clobbered by longjmp. */
1288 volatile int forkin
, forkout
;
1289 volatile int pty_flag
= 0;
1290 extern char **environ
;
1292 inchannel
= outchannel
= -1;
1295 if (!NILP (Vprocess_connection_type
))
1296 outchannel
= inchannel
= allocate_pty ();
1301 /* On USG systems it does not work to open the pty's tty here
1302 and then close and reopen it in the child. */
1304 /* Don't let this terminal become our controlling terminal
1305 (in case we don't have one). */
1306 forkout
= forkin
= open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1308 forkout
= forkin
= open (pty_name
, O_RDWR
, 0);
1311 report_file_error ("Opening pty", Qnil
);
1313 forkin
= forkout
= -1;
1314 #endif /* not USG */
1318 #endif /* HAVE_PTYS */
1321 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1322 report_file_error ("Opening socketpair", Qnil
);
1323 outchannel
= inchannel
= sv
[0];
1324 forkout
= forkin
= sv
[1];
1326 #else /* not SKTPAIR */
1335 #endif /* not SKTPAIR */
1338 /* Replaced by close_process_descs */
1339 set_exclusive_use (inchannel
);
1340 set_exclusive_use (outchannel
);
1343 /* Stride people say it's a mystery why this is needed
1344 as well as the O_NDELAY, but that it fails without this. */
1345 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1348 ioctl (inchannel
, FIONBIO
, &one
);
1353 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1354 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1357 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1358 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1362 /* Record this as an active process, with its channels.
1363 As a result, child_setup will close Emacs's side of the pipes. */
1364 chan_process
[inchannel
] = process
;
1365 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1366 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1367 /* Record the tty descriptor used in the subprocess. */
1369 XPROCESS (process
)->subtty
= Qnil
;
1371 XSETFASTINT (XPROCESS (process
)->subtty
, forkin
);
1372 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1373 XPROCESS (process
)->status
= Qrun
;
1374 if (!proc_decode_coding_system
[inchannel
])
1375 proc_decode_coding_system
[inchannel
]
1376 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
1377 setup_coding_system (XPROCESS (process
)->decode_coding_system
,
1378 proc_decode_coding_system
[inchannel
]);
1379 if (!proc_encode_coding_system
[outchannel
])
1380 proc_encode_coding_system
[outchannel
]
1381 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
1382 setup_coding_system (XPROCESS (process
)->encode_coding_system
,
1383 proc_encode_coding_system
[outchannel
]);
1385 /* Delay interrupts until we have a chance to store
1386 the new fork's pid in its process structure */
1387 #ifdef POSIX_SIGNALS
1388 sigemptyset (&blocked
);
1390 sigaddset (&blocked
, SIGCHLD
);
1393 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1394 this sets the parent's signal handlers as well as the child's.
1395 So delay all interrupts whose handlers the child might munge,
1396 and record the current handlers so they can be restored later. */
1397 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1398 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1400 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1402 #endif /* HAVE_VFORK */
1403 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1404 #else /* !POSIX_SIGNALS */
1408 #else /* not BSD4_1 */
1409 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1410 sigsetmask (sigmask (SIGCHLD
));
1411 #else /* ordinary USG */
1413 sigchld_deferred
= 0;
1414 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1416 #endif /* ordinary USG */
1417 #endif /* not BSD4_1 */
1418 #endif /* SIGCHLD */
1419 #endif /* !POSIX_SIGNALS */
1421 FD_SET (inchannel
, &input_wait_mask
);
1422 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1423 if (inchannel
> max_process_desc
)
1424 max_process_desc
= inchannel
;
1426 /* Until we store the proper pid, enable sigchld_handler
1427 to recognize an unknown pid as standing for this process.
1428 It is very important not to let this `marker' value stay
1429 in the table after this function has returned; if it does
1430 it might cause call-process to hang and subsequent asynchronous
1431 processes to get their return values scrambled. */
1432 XSETINT (XPROCESS (process
)->pid
, -1);
1437 /* child_setup must clobber environ on systems with true vfork.
1438 Protect it from permanent change. */
1439 char **save_environ
= environ
;
1444 #endif /* not WINDOWSNT */
1446 int xforkin
= forkin
;
1447 int xforkout
= forkout
;
1449 #if 0 /* This was probably a mistake--it duplicates code later on,
1450 but fails to handle all the cases. */
1451 /* Make sure SIGCHLD is not blocked in the child. */
1452 sigsetmask (SIGEMPTYMASK
);
1455 /* Make the pty be the controlling terminal of the process. */
1457 /* First, disconnect its current controlling terminal. */
1459 /* We tried doing setsid only if pty_flag, but it caused
1460 process_set_signal to fail on SGI when using a pipe. */
1462 /* Make the pty's terminal the controlling terminal. */
1466 /* We ignore the return value
1467 because faith@cs.unc.edu says that is necessary on Linux. */
1468 ioctl (xforkin
, TIOCSCTTY
, 0);
1471 #else /* not HAVE_SETSID */
1473 /* It's very important to call setpgrp here and no time
1474 afterwards. Otherwise, we lose our controlling tty which
1475 is set when we open the pty. */
1478 #endif /* not HAVE_SETSID */
1479 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1480 if (pty_flag
&& xforkin
>= 0)
1483 tcgetattr (xforkin
, &t
);
1485 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1486 write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1489 #if defined (NTTYDISC) && defined (TIOCSETD)
1490 if (pty_flag
&& xforkin
>= 0)
1492 /* Use new line discipline. */
1493 int ldisc
= NTTYDISC
;
1494 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1499 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1500 can do TIOCSPGRP only to the process's controlling tty. */
1503 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1504 I can't test it since I don't have 4.3. */
1505 int j
= open ("/dev/tty", O_RDWR
, 0);
1506 ioctl (j
, TIOCNOTTY
, 0);
1509 /* In order to get a controlling terminal on some versions
1510 of BSD, it is necessary to put the process in pgrp 0
1511 before it opens the terminal. */
1519 #endif /* TIOCNOTTY */
1521 #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY)
1522 /*** There is a suggestion that this ought to be a
1523 conditional on TIOCSPGRP,
1524 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1525 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1526 that system does seem to need this code, even though
1527 both HAVE_SETSID and TIOCSCTTY are defined. */
1528 /* Now close the pty (if we had it open) and reopen it.
1529 This makes the pty the controlling terminal of the subprocess. */
1532 #ifdef SET_CHILD_PTY_PGRP
1533 int pgrp
= getpid ();
1536 /* I wonder if close (open (pty_name, ...)) would work? */
1539 xforkout
= xforkin
= open (pty_name
, O_RDWR
, 0);
1543 write (1, "Couldn't open the pty terminal ", 31);
1544 write (1, pty_name
, strlen (pty_name
));
1549 #ifdef SET_CHILD_PTY_PGRP
1550 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1551 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1554 #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */
1556 #ifdef SETUP_SLAVE_PTY
1561 #endif /* SETUP_SLAVE_PTY */
1563 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1564 Now reenable it in the child, so it will die when we want it to. */
1566 signal (SIGHUP
, SIG_DFL
);
1568 #endif /* HAVE_PTYS */
1570 signal (SIGINT
, SIG_DFL
);
1571 signal (SIGQUIT
, SIG_DFL
);
1573 /* Stop blocking signals in the child. */
1574 #ifdef POSIX_SIGNALS
1575 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1576 #else /* !POSIX_SIGNALS */
1580 #else /* not BSD4_1 */
1581 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1582 sigsetmask (SIGEMPTYMASK
);
1583 #else /* ordinary USG */
1585 signal (SIGCHLD
, sigchld
);
1587 #endif /* ordinary USG */
1588 #endif /* not BSD4_1 */
1589 #endif /* SIGCHLD */
1590 #endif /* !POSIX_SIGNALS */
1593 child_setup_tty (xforkout
);
1595 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1596 new_argv
, 1, current_dir
);
1597 #else /* not WINDOWSNT */
1598 child_setup (xforkin
, xforkout
, xforkout
,
1599 new_argv
, 1, current_dir
);
1600 #endif /* not WINDOWSNT */
1602 environ
= save_environ
;
1607 /* This runs in the Emacs process. */
1612 if (forkin
!= forkout
&& forkout
>= 0)
1617 /* vfork succeeded. */
1618 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
1621 register_child (pid
, inchannel
);
1622 #endif /* WINDOWSNT */
1624 /* If the subfork execv fails, and it exits,
1625 this close hangs. I don't know why.
1626 So have an interrupt jar it loose. */
1628 signal (SIGALRM
, create_process_1
);
1630 XPROCESS (process
)->subtty
= Qnil
;
1635 if (forkin
!= forkout
&& forkout
>= 0)
1640 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1643 XPROCESS (process
)->tty_name
= Qnil
;
1646 /* Restore the signal state whether vfork succeeded or not.
1647 (We will signal an error, below, if it failed.) */
1648 #ifdef POSIX_SIGNALS
1650 /* Restore the parent's signal handlers. */
1651 sigaction (SIGINT
, &sigint_action
, 0);
1652 sigaction (SIGQUIT
, &sigquit_action
, 0);
1654 sigaction (SIGHUP
, &sighup_action
, 0);
1656 #endif /* HAVE_VFORK */
1657 /* Stop blocking signals in the parent. */
1658 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1659 #else /* !POSIX_SIGNALS */
1663 #else /* not BSD4_1 */
1664 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1665 sigsetmask (SIGEMPTYMASK
);
1666 #else /* ordinary USG */
1668 signal (SIGCHLD
, sigchld
);
1669 /* Now really handle any of these signals
1670 that came in during this function. */
1671 if (sigchld_deferred
)
1672 kill (getpid (), SIGCHLD
);
1674 #endif /* ordinary USG */
1675 #endif /* not BSD4_1 */
1676 #endif /* SIGCHLD */
1677 #endif /* !POSIX_SIGNALS */
1679 /* Now generate the error if vfork failed. */
1681 report_file_error ("Doing vfork", Qnil
);
1683 #endif /* not VMS */
1687 /* open a TCP network connection to a given HOST/SERVICE. Treated
1688 exactly like a normal process when reading and writing. Only
1689 differences are in status display and process deletion. A network
1690 connection has no PID; you cannot signal it. All you can do is
1691 deactivate and close it via delete-process */
1693 DEFUN ("open-network-stream", Fopen_network_stream
, Sopen_network_stream
,
1695 "Open a TCP connection for a service to a host.\n\
1696 Returns a subprocess-object to represent the connection.\n\
1697 Input and output work as for subprocesses; `delete-process' closes it.\n\
1698 Args are NAME BUFFER HOST SERVICE.\n\
1699 NAME is name for process. It is modified if necessary to make it unique.\n\
1700 BUFFER is the buffer (or buffer-name) to associate with the process.\n\
1701 Process output goes at end of that buffer, unless you specify\n\
1702 an output stream or filter function to handle the output.\n\
1703 BUFFER may be also nil, meaning that this process is not associated\n\
1705 Third arg is name of the host to connect to, or its IP address.\n\
1706 Fourth arg SERVICE is name of the service desired, or an integer\n\
1707 specifying a port number to connect to.")
1708 (name
, buffer
, host
, service
)
1709 Lisp_Object name
, buffer
, host
, service
;
1713 struct sockaddr_in address
;
1714 struct servent
*svc_info
;
1715 struct hostent
*host_info_ptr
, host_info
;
1716 char *(addr_list
[2]);
1717 IN_ADDR numeric_addr
;
1721 struct hostent host_info_fixed
;
1722 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1724 int count
= specpdl_ptr
- specpdl
;
1727 /* Ensure socket support is loaded if available. */
1728 init_winsock (TRUE
);
1731 GCPRO4 (name
, buffer
, host
, service
);
1732 CHECK_STRING (name
, 0);
1733 CHECK_STRING (host
, 0);
1734 if (INTEGERP (service
))
1735 port
= htons ((unsigned short) XINT (service
));
1738 CHECK_STRING (service
, 0);
1739 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
1741 error ("Unknown service \"%s\"", XSTRING (service
)->data
);
1742 port
= svc_info
->s_port
;
1745 /* Slow down polling to every ten seconds.
1746 Some kernels have a bug which causes retrying connect to fail
1747 after a connect. Polling can interfere with gethostbyname too. */
1748 #ifdef POLL_FOR_INPUT
1749 bind_polling_period (10);
1760 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
1763 if (! (host_info_ptr
== 0 && h_errno
== TRY_AGAIN
))
1766 Fsleep_for (make_number (1), Qnil
);
1768 if (host_info_ptr
== 0)
1769 /* Attempt to interpret host as numeric inet address */
1771 numeric_addr
= inet_addr ((char *) XSTRING (host
)->data
);
1772 if (NUMERIC_ADDR_ERROR
)
1773 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
1775 host_info_ptr
= &host_info
;
1776 host_info
.h_name
= 0;
1777 host_info
.h_aliases
= 0;
1778 host_info
.h_addrtype
= AF_INET
;
1780 /* Older machines have only one address slot called h_addr.
1781 Newer machines have h_addr_list, but #define h_addr to
1782 be its first element. */
1783 host_info
.h_addr_list
= &(addr_list
[0]);
1785 host_info
.h_addr
= (char*)(&numeric_addr
);
1787 /* numeric_addr isn't null-terminated; it has fixed length. */
1788 host_info
.h_length
= sizeof (numeric_addr
);
1791 bzero (&address
, sizeof address
);
1792 bcopy (host_info_ptr
->h_addr
, (char *) &address
.sin_addr
,
1793 host_info_ptr
->h_length
);
1794 address
.sin_family
= host_info_ptr
->h_addrtype
;
1795 address
.sin_port
= port
;
1797 s
= socket (host_info_ptr
->h_addrtype
, SOCK_STREAM
, 0);
1799 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1801 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
1802 when connect is interrupted. So let's not let it get interrupted.
1803 Note we do not turn off polling, because polling is only used
1804 when not interrupt_input, and thus not normally used on the systems
1805 which have this bug. On systems which use polling, there's no way
1806 to quit if polling is turned off. */
1807 if (interrupt_input
)
1815 if (connect (s
, (struct sockaddr
*) &address
, sizeof address
) == -1
1816 && errno
!= EISCONN
)
1824 if (errno
== EADDRINUSE
&& retry
< 20)
1826 /* A delay here is needed on some FreeBSD systems,
1827 and it is harmless, since this retrying takes time anyway
1828 and should be infrequent. */
1829 Fsleep_for (make_number (1), Qnil
);
1836 if (interrupt_input
)
1840 report_file_error ("connection failed",
1841 Fcons (host
, Fcons (name
, Qnil
)));
1846 #ifdef POLL_FOR_INPUT
1847 unbind_to (count
, Qnil
);
1850 if (interrupt_input
)
1854 s
= connect_server (0);
1856 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1857 send_command (s
, C_PORT
, 0, "%s:%d", XSTRING (host
)->data
, ntohs (port
));
1858 send_command (s
, C_DUMB
, 1, 0);
1865 buffer
= Fget_buffer_create (buffer
);
1866 proc
= make_process (name
);
1868 chan_process
[inch
] = proc
;
1871 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
1874 fcntl (inch
, F_SETFL
, O_NDELAY
);
1878 XPROCESS (proc
)->childp
= Fcons (host
, Fcons (service
, Qnil
));
1879 XPROCESS (proc
)->command_channel_p
= Qnil
;
1880 XPROCESS (proc
)->buffer
= buffer
;
1881 XPROCESS (proc
)->sentinel
= Qnil
;
1882 XPROCESS (proc
)->filter
= Qnil
;
1883 XPROCESS (proc
)->command
= Qnil
;
1884 XPROCESS (proc
)->pid
= Qnil
;
1885 XSETINT (XPROCESS (proc
)->infd
, inch
);
1886 XSETINT (XPROCESS (proc
)->outfd
, outch
);
1887 XPROCESS (proc
)->status
= Qrun
;
1888 FD_SET (inch
, &input_wait_mask
);
1889 FD_SET (inch
, &non_keyboard_wait_mask
);
1890 if (inch
> max_process_desc
)
1891 max_process_desc
= inch
;
1893 if (!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
)
1894 || NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
))
1896 XPROCESS (proc
)->decode_coding_system
= Qnil
;
1897 XPROCESS (proc
)->encode_coding_system
= Qnil
;
1901 /* Setup coding systems for communicating with the network stream. */
1902 struct gcpro gcpro1
;
1903 /* Qt denotes that we have not yet called Ffind_coding_system. */
1904 Lisp_Object coding_systems
= Qt
;
1905 Lisp_Object args
[5], val
;
1907 if (NILP (val
= Vcoding_system_for_read
))
1909 args
[0] = Qopen_network_stream
, args
[1] = name
,
1910 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
1912 coding_systems
= Ffind_coding_system (5, args
);
1914 if (CONSP (coding_systems
))
1915 val
= XCONS (coding_systems
)->car
;
1916 else if (CONSP (Vdefault_process_coding_system
))
1917 val
= XCONS (Vdefault_process_coding_system
)->car
;
1919 XPROCESS (proc
)->decode_coding_system
= val
;
1921 if (NILP (val
= Vcoding_system_for_write
))
1923 if (EQ (coding_systems
, Qt
))
1925 args
[0] = Qopen_network_stream
, args
[1] = name
,
1926 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
1928 coding_systems
= Ffind_coding_system (5, args
);
1931 if (CONSP (coding_systems
))
1932 val
= XCONS (coding_systems
)->cdr
;
1933 else if (CONSP (Vdefault_process_coding_system
))
1934 val
= XCONS (Vdefault_process_coding_system
)->cdr
;
1936 XPROCESS (proc
)->encode_coding_system
= val
;
1939 if (!proc_decode_coding_system
[inch
])
1940 proc_decode_coding_system
[inch
]
1941 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
1942 setup_coding_system (XPROCESS (proc
)->decode_coding_system
,
1943 proc_decode_coding_system
[inch
]);
1944 if (!proc_encode_coding_system
[outch
])
1945 proc_encode_coding_system
[outch
]
1946 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
1947 setup_coding_system (XPROCESS (proc
)->encode_coding_system
,
1948 proc_encode_coding_system
[outch
]);
1950 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
1951 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
1956 #endif /* HAVE_SOCKETS */
1958 deactivate_process (proc
)
1961 register int inchannel
, outchannel
;
1962 register struct Lisp_Process
*p
= XPROCESS (proc
);
1964 inchannel
= XINT (p
->infd
);
1965 outchannel
= XINT (p
->outfd
);
1969 /* Beware SIGCHLD hereabouts. */
1970 flush_pending_output (inchannel
);
1973 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
1974 sys$
dassgn (outchannel
);
1975 vs
= get_vms_process_pointer (p
->pid
);
1977 give_back_vms_process_stuff (vs
);
1981 if (outchannel
>= 0 && outchannel
!= inchannel
)
1985 XSETINT (p
->infd
, -1);
1986 XSETINT (p
->outfd
, -1);
1987 chan_process
[inchannel
] = Qnil
;
1988 FD_CLR (inchannel
, &input_wait_mask
);
1989 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
1990 if (inchannel
== max_process_desc
)
1993 /* We just closed the highest-numbered process input descriptor,
1994 so recompute the highest-numbered one now. */
1995 max_process_desc
= 0;
1996 for (i
= 0; i
< MAXDESC
; i
++)
1997 if (!NILP (chan_process
[i
]))
1998 max_process_desc
= i
;
2003 /* Close all descriptors currently in use for communication
2004 with subprocess. This is used in a newly-forked subprocess
2005 to get rid of irrelevant descriptors. */
2007 close_process_descs ()
2011 for (i
= 0; i
< MAXDESC
; i
++)
2013 Lisp_Object process
;
2014 process
= chan_process
[i
];
2015 if (!NILP (process
))
2017 int in
= XINT (XPROCESS (process
)->infd
);
2018 int out
= XINT (XPROCESS (process
)->outfd
);
2021 if (out
>= 0 && in
!= out
)
2028 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
2030 "Allow any pending output from subprocesses to be read by Emacs.\n\
2031 It is read into the process' buffers or given to their filter functions.\n\
2032 Non-nil arg PROCESS means do not return until some output has been received\n\
2034 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
2035 seconds and microseconds to wait; return after that much time whether\n\
2036 or not there is input.\n\
2037 Return non-nil iff we received any output before the timeout expired.")
2038 (process
, timeout
, timeout_msecs
)
2039 register Lisp_Object process
, timeout
, timeout_msecs
;
2044 if (! NILP (timeout_msecs
))
2046 CHECK_NUMBER (timeout_msecs
, 2);
2047 useconds
= XINT (timeout_msecs
);
2048 if (!INTEGERP (timeout
))
2049 XSETINT (timeout
, 0);
2052 int carry
= useconds
/ 1000000;
2054 XSETINT (timeout
, XINT (timeout
) + carry
);
2055 useconds
-= carry
* 1000000;
2057 /* I think this clause is necessary because C doesn't
2058 guarantee a particular rounding direction for negative
2062 XSETINT (timeout
, XINT (timeout
) - 1);
2063 useconds
+= 1000000;
2070 if (! NILP (timeout
))
2072 CHECK_NUMBER (timeout
, 1);
2073 seconds
= XINT (timeout
);
2074 if (seconds
< 0 || (seconds
== 0 && useconds
== 0))
2086 XSETFASTINT (process
, 0);
2089 (wait_reading_process_input (seconds
, useconds
, process
, 0)
2093 /* This variable is different from waiting_for_input in keyboard.c.
2094 It is used to communicate to a lisp process-filter/sentinel (via the
2095 function Fwaiting_for_user_input_p below) whether emacs was waiting
2096 for user-input when that process-filter was called.
2097 waiting_for_input cannot be used as that is by definition 0 when
2098 lisp code is being evalled.
2099 This is also used in record_asynch_buffer_change.
2100 For that purpose, this must be 0
2101 when not inside wait_reading_process_input. */
2102 static int waiting_for_user_input_p
;
2104 /* This is here so breakpoints can be put on it. */
2106 wait_reading_process_input_1 ()
2110 /* Read and dispose of subprocess output while waiting for timeout to
2111 elapse and/or keyboard input to be available.
2114 timeout in seconds, or
2115 zero for no limit, or
2116 -1 means gobble data immediately available but don't wait for any.
2119 an additional duration to wait, measured in microseconds.
2120 If this is nonzero and time_limit is 0, then the timeout
2121 consists of MICROSECS only.
2123 READ_KBD is a lisp value:
2124 0 to ignore keyboard input, or
2125 1 to return when input is available, or
2126 -1 meaning caller will actually read the input, so don't throw to
2127 the quit handler, or
2128 a cons cell, meaning wait until its car is non-nil
2129 (and gobble terminal input into the buffer if any arrives), or
2130 a process object, meaning wait until something arrives from that
2131 process. The return value is true iff we read some input from
2134 DO_DISPLAY != 0 means redisplay should be done to show subprocess
2135 output that arrives.
2137 If READ_KBD is a pointer to a struct Lisp_Process, then the
2138 function returns true iff we received input from that process
2139 before the timeout elapsed.
2140 Otherwise, return true iff we received input from any process. */
2142 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
2143 int time_limit
, microsecs
;
2144 Lisp_Object read_kbd
;
2147 register int channel
, nfds
, m
;
2148 static SELECT_TYPE Available
;
2151 EMACS_TIME timeout
, end_time
, garbage
;
2153 int wait_channel
= -1;
2154 struct Lisp_Process
*wait_proc
= 0;
2155 int got_some_input
= 0;
2156 Lisp_Object
*wait_for_cell
= 0;
2158 FD_ZERO (&Available
);
2160 /* If read_kbd is a process to watch, set wait_proc and wait_channel
2162 if (PROCESSP (read_kbd
))
2164 wait_proc
= XPROCESS (read_kbd
);
2165 wait_channel
= XINT (wait_proc
->infd
);
2166 XSETFASTINT (read_kbd
, 0);
2169 /* If waiting for non-nil in a cell, record where. */
2170 if (CONSP (read_kbd
))
2172 wait_for_cell
= &XCONS (read_kbd
)->car
;
2173 XSETFASTINT (read_kbd
, 0);
2176 waiting_for_user_input_p
= XINT (read_kbd
);
2178 /* Since we may need to wait several times,
2179 compute the absolute time to return at. */
2180 if (time_limit
|| microsecs
)
2182 EMACS_GET_TIME (end_time
);
2183 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
2184 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
2187 /* AlainF 5-Jul-1996
2188 HP-UX 10.10 seem to have problems with signals coming in
2189 Causes "poll: interrupted system call" messages when Emacs is run
2191 Turn off periodic alarms (in case they are in use) */
2197 int timeout_reduced_for_timers
= 0;
2199 /* If calling from keyboard input, do not quit
2200 since we want to return C-g as an input character.
2201 Otherwise, do pending quit if requested. */
2202 if (XINT (read_kbd
) >= 0)
2205 /* Exit now if the cell we're waiting for became non-nil. */
2206 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2209 /* Compute time from now till when time limit is up */
2210 /* Exit if already run out */
2211 if (time_limit
== -1)
2213 /* -1 specified for timeout means
2214 gobble output available now
2215 but don't wait at all. */
2217 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2219 else if (time_limit
|| microsecs
)
2221 EMACS_GET_TIME (timeout
);
2222 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
2223 if (EMACS_TIME_NEG_P (timeout
))
2228 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
2231 /* Normally we run timers here.
2232 But not if wait_for_cell; in those cases,
2233 the wait is supposed to be short,
2234 and those callers cannot handle running arbitrary Lisp code here. */
2235 if (! wait_for_cell
)
2237 EMACS_TIME timer_delay
;
2241 old_timers_run
= timers_run
;
2242 timer_delay
= timer_check (1);
2243 if (timers_run
!= old_timers_run
&& do_display
)
2245 redisplay_preserve_echo_area ();
2246 /* We must retry, since a timer may have requeued itself
2247 and that could alter the time_delay. */
2251 /* If there is unread keyboard input, also return. */
2252 if (XINT (read_kbd
) != 0
2253 && requeued_events_pending_p ())
2256 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
2258 EMACS_TIME difference
;
2259 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
2260 if (EMACS_TIME_NEG_P (difference
))
2262 timeout
= timer_delay
;
2263 timeout_reduced_for_timers
= 1;
2266 /* If time_limit is -1, we are not going to wait at all. */
2267 else if (time_limit
!= -1)
2269 /* This is so a breakpoint can be put here. */
2270 wait_reading_process_input_1 ();
2274 /* Cause C-g and alarm signals to take immediate action,
2275 and cause input available signals to zero out timeout.
2277 It is important that we do this before checking for process
2278 activity. If we get a SIGCHLD after the explicit checks for
2279 process activity, timeout is the only way we will know. */
2280 if (XINT (read_kbd
) < 0)
2281 set_waiting_for_input (&timeout
);
2283 /* If status of something has changed, and no input is
2284 available, notify the user of the change right away. After
2285 this explicit check, we'll let the SIGCHLD handler zap
2286 timeout to get our attention. */
2287 if (update_tick
!= process_tick
&& do_display
)
2289 Atemp
= input_wait_mask
;
2290 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2291 if ((select (MAXDESC
, &Atemp
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2295 /* It's okay for us to do this and then continue with
2296 the loop, since timeout has already been zeroed out. */
2297 clear_waiting_for_input ();
2302 /* Don't wait for output from a non-running process. */
2303 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
2304 update_status (wait_proc
);
2306 && ! EQ (wait_proc
->status
, Qrun
))
2308 clear_waiting_for_input ();
2312 /* Wait till there is something to do */
2315 Available
= non_process_wait_mask
;
2316 else if (! XINT (read_kbd
))
2317 Available
= non_keyboard_wait_mask
;
2319 Available
= input_wait_mask
;
2321 /* If frame size has changed or the window is newly mapped,
2322 redisplay now, before we start to wait. There is a race
2323 condition here; if a SIGIO arrives between now and the select
2324 and indicates that a frame is trashed, the select may block
2325 displaying a trashed screen. */
2326 if (frame_garbaged
&& do_display
)
2328 clear_waiting_for_input ();
2329 redisplay_preserve_echo_area ();
2330 if (XINT (read_kbd
) < 0)
2331 set_waiting_for_input (&timeout
);
2334 if (XINT (read_kbd
) && detect_input_pending ())
2337 FD_ZERO (&Available
);
2340 nfds
= select (MAXDESC
, &Available
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2345 /* Make C-g and alarm signals set flags again */
2346 clear_waiting_for_input ();
2348 /* If we woke up due to SIGWINCH, actually change size now. */
2349 do_pending_window_change ();
2351 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
2352 /* We wanted the full specified time, so return now. */
2356 if (xerrno
== EINTR
)
2357 FD_ZERO (&Available
);
2359 /* Ultrix select seems to return ENOMEM when it is
2360 interrupted. Treat it just like EINTR. Bleah. Note
2361 that we want to test for the "ultrix" CPP symbol, not
2362 "__ultrix__"; the latter is only defined under GCC, but
2363 not by DEC's bundled CC. -JimB */
2364 else if (xerrno
== ENOMEM
)
2365 FD_ZERO (&Available
);
2368 /* This happens for no known reason on ALLIANT.
2369 I am guessing that this is the right response. -- RMS. */
2370 else if (xerrno
== EFAULT
)
2371 FD_ZERO (&Available
);
2373 else if (xerrno
== EBADF
)
2376 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
2377 the child's closure of the pts gives the parent a SIGHUP, and
2378 the ptc file descriptor is automatically closed,
2379 yielding EBADF here or at select() call above.
2380 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
2381 in m/ibmrt-aix.h), and here we just ignore the select error.
2382 Cleanup occurs c/o status_notify after SIGCLD. */
2383 FD_ZERO (&Available
); /* Cannot depend on values returned */
2389 error ("select error: %s", strerror (xerrno
));
2391 #if defined(sun) && !defined(USG5_4)
2392 else if (nfds
> 0 && keyboard_bit_set (&Available
)
2394 /* System sometimes fails to deliver SIGIO.
2396 David J. Mackenzie says that Emacs doesn't compile under
2397 Solaris if this code is enabled, thus the USG5_4 in the CPP
2398 conditional. "I haven't noticed any ill effects so far.
2399 If you find a Solaris expert somewhere, they might know
2401 kill (getpid (), SIGIO
);
2404 /* Check for keyboard input */
2405 /* If there is any, return immediately
2406 to give it higher priority than subprocesses */
2408 if ((XINT (read_kbd
) != 0)
2409 && detect_input_pending_run_timers (do_display
))
2411 swallow_events (do_display
);
2412 if (detect_input_pending_run_timers (do_display
))
2416 /* If there is unread keyboard input, also return. */
2417 if (XINT (read_kbd
) != 0
2418 && requeued_events_pending_p ())
2421 /* If wait_for_cell. check for keyboard input
2422 but don't run any timers.
2423 ??? (It seems wrong to me to check for keyboard
2424 input at all when wait_for_cell, but the code
2425 has been this way since July 1994.
2426 Try changing this after version 19.31.) */
2428 && detect_input_pending ())
2430 swallow_events (do_display
);
2431 if (detect_input_pending ())
2435 /* Exit now if the cell we're waiting for became non-nil. */
2436 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2440 /* If we think we have keyboard input waiting, but didn't get SIGIO
2441 go read it. This can happen with X on BSD after logging out.
2442 In that case, there really is no input and no SIGIO,
2443 but select says there is input. */
2445 if (XINT (read_kbd
) && interrupt_input
2446 && (keyboard_bit_set (&Available
)))
2447 kill (getpid (), SIGIO
);
2451 got_some_input
|= nfds
> 0;
2453 /* If checking input just got us a size-change event from X,
2454 obey it now if we should. */
2455 if (XINT (read_kbd
) || wait_for_cell
)
2456 do_pending_window_change ();
2458 /* Check for data from a process. */
2459 /* Really FIRST_PROC_DESC should be 0 on Unix,
2460 but this is safer in the short run. */
2461 for (channel
= 0; channel
<= max_process_desc
; channel
++)
2463 if (FD_ISSET (channel
, &Available
)
2464 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
2468 /* If waiting for this channel, arrange to return as
2469 soon as no more input to be processed. No more
2471 if (wait_channel
== channel
)
2477 proc
= chan_process
[channel
];
2481 /* Read data from the process, starting with our
2482 buffered-ahead character if we have one. */
2484 nread
= read_process_output (proc
, channel
);
2487 /* Since read_process_output can run a filter,
2488 which can call accept-process-output,
2489 don't try to read from any other processes
2490 before doing the select again. */
2491 FD_ZERO (&Available
);
2494 redisplay_preserve_echo_area ();
2497 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2500 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
2501 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
2503 else if (nread
== -1 && errno
== EAGAIN
)
2507 else if (nread
== -1 && errno
== EAGAIN
)
2509 /* Note that we cannot distinguish between no input
2510 available now and a closed pipe.
2511 With luck, a closed pipe will be accompanied by
2512 subprocess termination and SIGCHLD. */
2513 else if (nread
== 0 && !NETCONN_P (proc
))
2515 #endif /* O_NDELAY */
2516 #endif /* O_NONBLOCK */
2518 /* On some OSs with ptys, when the process on one end of
2519 a pty exits, the other end gets an error reading with
2520 errno = EIO instead of getting an EOF (0 bytes read).
2521 Therefore, if we get an error reading and errno =
2522 EIO, just continue, because the child process has
2523 exited and should clean itself up soon (e.g. when we
2525 else if (nread
== -1 && errno
== EIO
)
2527 #endif /* HAVE_PTYS */
2528 /* If we can detect process termination, don't consider the process
2529 gone just because its pipe is closed. */
2531 else if (nread
== 0 && !NETCONN_P (proc
))
2536 /* Preserve status of processes already terminated. */
2537 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2538 deactivate_process (proc
);
2539 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2540 update_status (XPROCESS (proc
));
2541 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2542 XPROCESS (proc
)->status
2543 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2546 } /* end for each file descriptor */
2547 } /* end while exit conditions not met */
2549 waiting_for_user_input_p
= 0;
2551 /* If calling from keyboard input, do not quit
2552 since we want to return C-g as an input character.
2553 Otherwise, do pending quit if requested. */
2554 if (XINT (read_kbd
) >= 0)
2556 /* Prevent input_pending from remaining set if we quit. */
2557 clear_input_pending ();
2561 /* AlainF 5-Jul-1996
2562 HP-UX 10.10 seems to have problems with signals coming in
2563 Causes "poll: interrupted system call" messages when Emacs is run
2565 Turn periodic alarms back on */
2569 return got_some_input
;
2572 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
2575 read_process_output_call (fun_and_args
)
2576 Lisp_Object fun_and_args
;
2578 return apply1 (XCONS (fun_and_args
)->car
, XCONS (fun_and_args
)->cdr
);
2582 read_process_output_error_handler (error
)
2585 cmd_error_internal (error
, "error in process filter: ");
2587 update_echo_area ();
2588 Fsleep_for (make_number (2), Qnil
);
2592 #define READ_CHILD_OUTPUT read_child_output
2594 #define READ_CHILD_OUTPUT read
2597 /* Read pending output from the process channel,
2598 starting with our buffered-ahead character if we have one.
2599 Yield number of decoded characters read.
2601 This function reads at most 1024 characters.
2602 If you want to read all available subprocess output,
2603 you must call it repeatedly until it returns zero.
2605 The characters read are decoded according to PROC's coding-system
2608 read_process_output (proc
, channel
)
2610 register int channel
;
2612 register int nchars
;
2615 int chars_allocated
= 0; /* If 1, `chars' should be freed later. */
2619 register Lisp_Object outstream
;
2620 register struct buffer
*old
= current_buffer
;
2621 register struct Lisp_Process
*p
= XPROCESS (proc
);
2622 register int opoint
;
2623 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
2624 int chars_in_decoding_buf
= 0; /* If 1, `chars' points
2625 XSTRING (p->decoding_buf)->data. */
2628 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2630 vs
= get_vms_process_pointer (p
->pid
);
2634 return(0); /* Really weird if it does this */
2635 if (!(vs
->iosb
[0] & 1))
2636 return -1; /* I/O error */
2639 error ("Could not get VMS process pointer");
2640 chars
= vs
->inputBuffer
;
2641 nchars
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2644 start_vms_process_read (vs
); /* Crank up the next read on the process */
2645 return 1; /* Nothing worth printing, say we got 1 */
2647 if (coding
->carryover_size
)
2649 /* The data carried over in the previous decoding should be
2650 prepended to the new data read to decode all together. */
2651 char *buf
= (char *) xmalloc (nchars
+ coding
->carryover_size
);
2653 bcopy (coding
->carryover
, buf
, coding
->carryover_size
);
2654 bcopy (chars
, buf
+ coding
->carryover_size
, nchars
);
2656 chars_allocated
= 1;
2660 if (coding
->carryover_size
)
2661 /* The data carried over in the previous decoding should be
2662 prepended to the new data read to decode all together. */
2663 bcopy (coding
->carryover
, buf
, coding
->carryover_size
);
2665 if (proc_buffered_char
[channel
] < 0)
2666 nchars
= READ_CHILD_OUTPUT (channel
, buf
+ coding
->carryover_size
,
2667 (sizeof buf
) - coding
->carryover_size
);
2670 buf
[coding
->carryover_size
] = proc_buffered_char
[channel
];
2671 proc_buffered_char
[channel
] = -1;
2672 nchars
= READ_CHILD_OUTPUT (channel
, buf
+ coding
->carryover_size
+ 1,
2673 (sizeof buf
) - coding
->carryover_size
- 1);
2677 nchars
= nchars
+ 1;
2680 #endif /* not VMS */
2682 /* At this point, NCHARS holds number of characters just received
2683 (including the one in proc_buffered_char[channel]). */
2684 if (nchars
<= 0) return nchars
;
2686 /* Now set NCHARS how many bytes we must decode. */
2687 nchars
+= coding
->carryover_size
;
2689 if (CODING_REQUIRE_CONVERSION (coding
))
2691 int require
= decoding_buffer_size (coding
, nchars
);
2692 int consumed
, produced
;
2694 if (XSTRING (p
->decoding_buf
)->size
< require
)
2695 p
->decoding_buf
= make_uninit_string (require
);
2696 produced
= decode_coding (coding
, chars
, XSTRING (p
->decoding_buf
)->data
,
2697 nchars
, XSTRING (p
->decoding_buf
)->size
,
2700 /* New coding-system might be found by `decode_coding'. */
2701 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
2703 p
->decode_coding_system
= coding
->symbol
;
2704 setup_coding_system (coding
->symbol
,
2705 proc_decode_coding_system
[channel
]);
2706 /* If coding-system for encoding is not yet decided, we set it
2707 as the same as coding-system for decoding. */
2708 if (NILP (p
->encode_coding_system
))
2710 p
->encode_coding_system
= coding
->symbol
;
2711 setup_coding_system (coding
->symbol
,
2712 proc_encode_coding_system
[channel
]);
2716 /* Now we don't need the contents of `chars'. */
2717 if (chars_allocated
)
2722 chars
= XSTRING (p
->decoding_buf
)->data
;
2724 chars_in_decoding_buf
= 1;
2727 else if (chars_allocated
)
2729 /* Although we don't have to decode the received data, we must
2730 move it to an area which we don't have to free. */
2731 if (! STRINGP (p
->decoding_buf
)
2732 || XSTRING (p
->decoding_buf
)->size
< nchars
)
2733 p
->decoding_buf
= make_uninit_string (nchars
);
2734 bcopy (chars
, XSTRING (p
->decoding_buf
)->data
, nchars
);
2736 chars
= XSTRING (p
->decoding_buf
)->data
;
2737 chars_in_decoding_buf
= 1;
2741 outstream
= p
->filter
;
2742 if (!NILP (outstream
))
2744 /* We inhibit quit here instead of just catching it so that
2745 hitting ^G when a filter happens to be running won't screw
2747 int count
= specpdl_ptr
- specpdl
;
2748 Lisp_Object odeactivate
;
2749 Lisp_Object obuffer
, okeymap
;
2750 int outer_running_asynch_code
= running_asynch_code
;
2752 /* No need to gcpro these, because all we do with them later
2753 is test them for EQness, and none of them should be a string. */
2754 odeactivate
= Vdeactivate_mark
;
2755 XSETBUFFER (obuffer
, current_buffer
);
2756 okeymap
= current_buffer
->keymap
;
2758 specbind (Qinhibit_quit
, Qt
);
2759 specbind (Qlast_nonmenu_event
, Qt
);
2761 /* In case we get recursively called,
2762 and we already saved the match data nonrecursively,
2763 save the same match data in safely recursive fashion. */
2764 if (outer_running_asynch_code
)
2767 /* Don't clobber the CURRENT match data, either! */
2768 tem
= Fmatch_data (Qnil
, Qnil
);
2769 restore_match_data ();
2770 record_unwind_protect (Fstore_match_data
, Fmatch_data (Qnil
, Qnil
));
2771 Fstore_match_data (tem
);
2774 /* For speed, if a search happens within this code,
2775 save the match data in a special nonrecursive fashion. */
2776 running_asynch_code
= 1;
2778 /* Read and dispose of the process output. */
2779 internal_condition_case_1 (read_process_output_call
,
2782 Fcons (make_string (chars
,
2785 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
2786 read_process_output_error_handler
);
2788 /* If we saved the match data nonrecursively, restore it now. */
2789 restore_match_data ();
2790 running_asynch_code
= outer_running_asynch_code
;
2792 /* Handling the process output should not deactivate the mark. */
2793 Vdeactivate_mark
= odeactivate
;
2795 #if 0 /* Call record_asynch_buffer_change unconditionally,
2796 because we might have changed minor modes or other things
2797 that affect key bindings. */
2798 if (! EQ (Fcurrent_buffer (), obuffer
)
2799 || ! EQ (current_buffer
->keymap
, okeymap
))
2801 /* But do it only if the caller is actually going to read events.
2802 Otherwise there's no need to make him wake up, and it could
2803 cause trouble (for example it would make Fsit_for return). */
2804 if (waiting_for_user_input_p
== -1)
2805 record_asynch_buffer_change ();
2808 start_vms_process_read (vs
);
2810 unbind_to (count
, Qnil
);
2814 /* If no filter, write into buffer if it isn't dead. */
2815 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2817 Lisp_Object old_read_only
;
2818 int old_begv
, old_zv
;
2819 Lisp_Object odeactivate
;
2822 odeactivate
= Vdeactivate_mark
;
2824 Fset_buffer (p
->buffer
);
2826 old_read_only
= current_buffer
->read_only
;
2830 current_buffer
->read_only
= Qnil
;
2832 /* Insert new output into buffer
2833 at the current end-of-output marker,
2834 thus preserving logical ordering of input and output. */
2835 if (XMARKER (p
->mark
)->buffer
)
2836 SET_PT (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
));
2841 /* If the output marker is outside of the visible region, save
2842 the restriction and widen. */
2843 if (! (BEGV
<= PT
&& PT
<= ZV
))
2846 /* Insert before markers in case we are inserting where
2847 the buffer's mark is, and the user's next command is Meta-y. */
2848 if (chars_in_decoding_buf
)
2849 insert_from_string_before_markers (p
->decoding_buf
, 0, nchars
, 0);
2851 insert_before_markers (chars
, nchars
);
2852 Fset_marker (p
->mark
, make_number (PT
), p
->buffer
);
2854 update_mode_lines
++;
2856 /* Make sure opoint and the old restrictions
2857 float ahead of any new text just as point would. */
2858 if (opoint
>= before
)
2859 opoint
+= PT
- before
;
2860 if (old_begv
> before
)
2861 old_begv
+= PT
- before
;
2862 if (old_zv
>= before
)
2863 old_zv
+= PT
- before
;
2865 /* If the restriction isn't what it should be, set it. */
2866 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
2867 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
2869 /* Handling the process output should not deactivate the mark. */
2870 Vdeactivate_mark
= odeactivate
;
2872 current_buffer
->read_only
= old_read_only
;
2874 set_buffer_internal (old
);
2877 start_vms_process_read (vs
);
2882 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
2884 "Returns non-nil if emacs is waiting for input from the user.\n\
2885 This is intended for use by asynchronous process output filters and sentinels.")
2888 return (waiting_for_user_input_p
? Qt
: Qnil
);
2891 /* Sending data to subprocess */
2893 jmp_buf send_process_frame
;
2896 send_process_trap ()
2902 longjmp (send_process_frame
, 1);
2905 /* Send some data to process PROC.
2906 BUF is the beginning of the data; LEN is the number of characters.
2907 OBJECT is the Lisp object that the data comes from.
2909 The data is encoded by PROC's coding-system for encoding before it
2910 is sent. But if the data ends at the middle of multi-byte
2911 representation, that incomplete sequence of bytes are sent without
2912 being encoded. Should we store them in a buffer to prepend them to
2913 the data send later? */
2915 send_process (proc
, buf
, len
, object
)
2916 volatile Lisp_Object proc
;
2921 /* Use volatile to protect variables from being clobbered by longjmp. */
2923 volatile unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
2924 struct coding_system
*coding
;
2925 struct gcpro gcpro1
;
2930 struct Lisp_Process
*p
= XPROCESS (proc
);
2931 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2934 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2935 update_status (XPROCESS (proc
));
2936 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2937 error ("Process %s not running", procname
);
2938 if (XINT (XPROCESS (proc
)->outfd
) < 0)
2939 error ("Output file descriptor of %s is closed", procname
);
2941 coding
= proc_encode_coding_system
[XINT (XPROCESS (proc
)->outfd
)];
2942 if (CODING_REQUIRE_CONVERSION (coding
))
2944 int require
= encoding_buffer_size (coding
, len
);
2946 char *temp_buf
= NULL
;
2948 /* Remember the offset of data because a string or a buffer may
2949 be relocated. Setting OFFSET to -1 means we don't have to
2951 offset
= (BUFFERP (object
)
2952 ? BUF_PTR_CHAR_POS (XBUFFER (object
), (unsigned char *) buf
)
2954 ? offset
= buf
- (char *) XSTRING (object
)->data
2957 if (coding
->carryover_size
> 0)
2959 temp_buf
= (char *) xmalloc (len
+ coding
->carryover_size
);
2963 if (BUFFERP (object
))
2964 buf
= (char *) BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
2965 else if (STRINGP (object
))
2966 buf
= offset
+ (char *) XSTRING (object
)->data
;
2967 /* Now we don't have to care relocation. */
2970 bcopy (coding
->carryover
, temp_buf
, coding
->carryover_size
);
2971 bcopy (buf
, temp_buf
+ coding
->carryover_size
, len
);
2975 if (XSTRING (XPROCESS (proc
)->encoding_buf
)->size
< require
)
2977 XPROCESS (proc
)->encoding_buf
= make_uninit_string (require
);
2981 if (BUFFERP (object
))
2982 buf
= (char *) BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
2983 else if (STRINGP (object
))
2984 buf
= offset
+ (char *) XSTRING (object
)->data
;
2987 object
= XPROCESS (proc
)->encoding_buf
;
2988 len
= encode_coding (coding
, buf
, XSTRING (object
)->data
,
2989 len
, XSTRING (object
)->size
, &dummy
);
2990 buf
= XSTRING (object
)->data
;
2996 vs
= get_vms_process_pointer (p
->pid
);
2998 error ("Could not find this process: %x", p
->pid
);
2999 else if (write_to_vms_process (vs
, buf
, len
))
3003 if (pty_max_bytes
== 0)
3005 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
3006 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
3008 if (pty_max_bytes
< 0)
3009 pty_max_bytes
= 250;
3011 pty_max_bytes
= 250;
3013 /* Deduct one, to leave space for the eof. */
3017 if (!setjmp (send_process_frame
))
3021 SIGTYPE (*old_sigpipe
)();
3024 /* Decide how much data we can send in one batch.
3025 Long lines need to be split into multiple batches. */
3026 if (!NILP (XPROCESS (proc
)->pty_flag
))
3028 /* Starting this at zero is always correct when not the first iteration
3029 because the previous iteration ended by sending C-d.
3030 It may not be correct for the first iteration
3031 if a partial line was sent in a separate send_process call.
3032 If that proves worth handling, we need to save linepos
3033 in the process object. */
3036 char *end
= buf
+ len
;
3038 /* Scan through this text for a line that is too long. */
3039 while (ptr
!= end
&& linepos
< pty_max_bytes
)
3047 /* If we found one, break the line there
3048 and put in a C-d to force the buffer through. */
3052 /* Send this batch, using one or more write calls. */
3055 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
3056 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
3057 signal (SIGPIPE
, old_sigpipe
);
3063 || errno
== EWOULDBLOCK
3069 /* Buffer is full. Wait, accepting input;
3070 that may allow the program
3071 to finish doing output and read more. */
3076 /* Running filters might relocate buffers or strings.
3077 Arrange to relocate BUF. */
3078 if (BUFFERP (object
))
3079 offset
= BUF_PTR_CHAR_POS (XBUFFER (object
),
3080 (unsigned char *) buf
);
3081 else if (STRINGP (object
))
3082 offset
= buf
- (char *) XSTRING (object
)->data
;
3084 XSETFASTINT (zero
, 0);
3085 #ifdef EMACS_HAS_USECS
3086 wait_reading_process_input (0, 20000, zero
, 0);
3088 wait_reading_process_input (1, 0, zero
, 0);
3091 if (BUFFERP (object
))
3092 buf
= (char *) BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
3093 else if (STRINGP (object
))
3094 buf
= offset
+ (char *) XSTRING (object
)->data
;
3099 /* This is a real error. */
3100 report_file_error ("writing to process", Fcons (proc
, Qnil
));
3107 /* If we sent just part of the string, put in an EOF
3108 to force it through, before we send the rest. */
3110 Fprocess_send_eof (proc
);
3115 XPROCESS (proc
)->raw_status_low
= Qnil
;
3116 XPROCESS (proc
)->raw_status_high
= Qnil
;
3117 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
3118 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
3119 deactivate_process (proc
);
3121 error ("Error writing to process %s; closed it", procname
);
3123 error ("SIGPIPE raised on process %s; closed it", procname
);
3130 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
3132 "Send current contents of region as input to PROCESS.\n\
3133 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3134 nil, indicating the current buffer's process.\n\
3135 Called from program, takes three arguments, PROCESS, START and END.\n\
3136 If the region is more than 500 characters long,\n\
3137 it is sent in several bunches. This may happen even for shorter regions.\n\
3138 Output from processes can arrive in between bunches.")
3139 (process
, start
, end
)
3140 Lisp_Object process
, start
, end
;
3145 proc
= get_process (process
);
3146 validate_region (&start
, &end
);
3148 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
3151 start1
= XINT (start
);
3152 send_process (proc
, POS_ADDR (start1
), XINT (end
) - XINT (start
),
3153 Fcurrent_buffer ());
3158 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
3160 "Send PROCESS the contents of STRING as input.\n\
3161 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3162 nil, indicating the current buffer's process.\n\
3163 If STRING is more than 500 characters long,\n\
3164 it is sent in several bunches. This may happen even for shorter strings.\n\
3165 Output from processes can arrive in between bunches.")
3167 Lisp_Object process
, string
;
3170 CHECK_STRING (string
, 1);
3171 proc
= get_process (process
);
3172 send_process (proc
, XSTRING (string
)->data
, XSTRING (string
)->size
, string
);
3176 /* send a signal number SIGNO to PROCESS.
3177 CURRENT_GROUP means send to the process group that currently owns
3178 the terminal being used to communicate with PROCESS.
3179 This is used for various commands in shell mode.
3180 If NOMSG is zero, insert signal-announcements into process's buffers
3183 If we can, we try to signal PROCESS by sending control characters
3184 down the pty. This allows us to signal inferiors who have changed
3185 their uid, for which killpg would return an EPERM error. */
3188 process_send_signal (process
, signo
, current_group
, nomsg
)
3189 Lisp_Object process
;
3191 Lisp_Object current_group
;
3195 register struct Lisp_Process
*p
;
3199 proc
= get_process (process
);
3200 p
= XPROCESS (proc
);
3202 if (!EQ (p
->childp
, Qt
))
3203 error ("Process %s is not a subprocess",
3204 XSTRING (p
->name
)->data
);
3205 if (XINT (p
->infd
) < 0)
3206 error ("Process %s is not active",
3207 XSTRING (p
->name
)->data
);
3209 if (NILP (p
->pty_flag
))
3210 current_group
= Qnil
;
3212 /* If we are using pgrps, get a pgrp number and make it negative. */
3213 if (!NILP (current_group
))
3215 #ifdef SIGNALS_VIA_CHARACTERS
3216 /* If possible, send signals to the entire pgrp
3217 by sending an input character to it. */
3219 /* TERMIOS is the latest and bestest, and seems most likely to
3220 work. If the system has it, use it. */
3227 tcgetattr (XINT (p
->infd
), &t
);
3228 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
3232 tcgetattr (XINT (p
->infd
), &t
);
3233 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
3237 tcgetattr (XINT (p
->infd
), &t
);
3238 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
3239 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
3241 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
3246 #else /* ! HAVE_TERMIOS */
3248 /* On Berkeley descendants, the following IOCTL's retrieve the
3249 current control characters. */
3250 #if defined (TIOCGLTC) && defined (TIOCGETC)
3258 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
3259 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
3262 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
3263 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
3267 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
3268 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
3270 #endif /* ! defined (SIGTSTP) */
3273 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
3275 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
3282 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3283 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
3286 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3287 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
3291 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3292 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
3294 #endif /* ! defined (SIGTSTP) */
3296 #else /* ! defined (TCGETA) */
3297 Your configuration files are messed up
.
3298 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
3299 you'd better be using one of the alternatives above! */
3300 #endif /* ! defined (TCGETA) */
3301 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
3302 #endif /* ! defined HAVE_TERMIOS */
3303 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
3306 /* Get the pgrp using the tty itself, if we have that.
3307 Otherwise, use the pty to get the pgrp.
3308 On pfa systems, saka@pfu.fujitsu.co.JP writes:
3309 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
3310 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
3311 His patch indicates that if TIOCGPGRP returns an error, then
3312 we should just assume that p->pid is also the process group id. */
3316 if (!NILP (p
->subtty
))
3317 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
3319 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
3323 gid
= - XFASTINT (p
->pid
);
3324 #endif /* ! defined (pfa) */
3330 #else /* ! defined (TIOCGPGRP ) */
3331 /* Can't select pgrps on this system, so we know that
3332 the child itself heads the pgrp. */
3333 gid
= - XFASTINT (p
->pid
);
3334 #endif /* ! defined (TIOCGPGRP ) */
3337 gid
= - XFASTINT (p
->pid
);
3343 p
->raw_status_low
= Qnil
;
3344 p
->raw_status_high
= Qnil
;
3346 XSETINT (p
->tick
, ++process_tick
);
3350 #endif /* ! defined (SIGCONT) */
3353 send_process (proc
, "\003", 1, Qnil
); /* ^C */
3358 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
3363 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
3366 flush_pending_output (XINT (p
->infd
));
3370 /* If we don't have process groups, send the signal to the immediate
3371 subprocess. That isn't really right, but it's better than any
3372 obvious alternative. */
3375 kill (XFASTINT (p
->pid
), signo
);
3379 /* gid may be a pid, or minus a pgrp's number */
3381 if (!NILP (current_group
))
3382 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
3385 gid
= - XFASTINT (p
->pid
);
3388 #else /* ! defined (TIOCSIGSEND) */
3389 EMACS_KILLPG (-gid
, signo
);
3390 #endif /* ! defined (TIOCSIGSEND) */
3393 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
3394 "Interrupt process PROCESS. May be process or name of one.\n\
3395 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
3396 nil or no arg means current buffer's process.\n\
3397 Second arg CURRENT-GROUP non-nil means send signal to\n\
3398 the current process-group of the process's controlling terminal\n\
3399 rather than to the process's own process group.\n\
3400 If the process is a shell, this means interrupt current subjob\n\
3401 rather than the shell.")
3402 (process
, current_group
)
3403 Lisp_Object process
, current_group
;
3405 process_send_signal (process
, SIGINT
, current_group
, 0);
3409 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
3410 "Kill process PROCESS. May be process or name of one.\n\
3411 See function `interrupt-process' for more details on usage.")
3412 (process
, current_group
)
3413 Lisp_Object process
, current_group
;
3415 process_send_signal (process
, SIGKILL
, current_group
, 0);
3419 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
3420 "Send QUIT signal to process PROCESS. May be process or name of one.\n\
3421 See function `interrupt-process' for more details on usage.")
3422 (process
, current_group
)
3423 Lisp_Object process
, current_group
;
3425 process_send_signal (process
, SIGQUIT
, current_group
, 0);
3429 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
3430 "Stop process PROCESS. May be process or name of one.\n\
3431 See function `interrupt-process' for more details on usage.")
3432 (process
, current_group
)
3433 Lisp_Object process
, current_group
;
3436 error ("no SIGTSTP support");
3438 process_send_signal (process
, SIGTSTP
, current_group
, 0);
3443 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
3444 "Continue process PROCESS. May be process or name of one.\n\
3445 See function `interrupt-process' for more details on usage.")
3446 (process
, current_group
)
3447 Lisp_Object process
, current_group
;
3450 process_send_signal (process
, SIGCONT
, current_group
, 0);
3452 error ("no SIGCONT support");
3457 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
3458 2, 2, "nProcess number: \nnSignal code: ",
3459 "Send the process with process id PID the signal with code SIGCODE.\n\
3460 PID must be an integer. The process need not be a child of this Emacs.\n\
3461 SIGCODE may be an integer, or a symbol whose name is a signal name.")
3463 Lisp_Object pid
, sigcode
;
3465 CHECK_NUMBER (pid
, 0);
3467 #define handle_signal(NAME, VALUE) \
3468 else if (!strcmp (name, NAME)) \
3469 XSETINT (sigcode, VALUE)
3471 if (INTEGERP (sigcode
))
3475 unsigned char *name
;
3477 CHECK_SYMBOL (sigcode
, 1);
3478 name
= XSYMBOL (sigcode
)->name
->data
;
3483 handle_signal ("SIGHUP", SIGHUP
);
3486 handle_signal ("SIGINT", SIGINT
);
3489 handle_signal ("SIGQUIT", SIGQUIT
);
3492 handle_signal ("SIGILL", SIGILL
);
3495 handle_signal ("SIGABRT", SIGABRT
);
3498 handle_signal ("SIGEMT", SIGEMT
);
3501 handle_signal ("SIGKILL", SIGKILL
);
3504 handle_signal ("SIGFPE", SIGFPE
);
3507 handle_signal ("SIGBUS", SIGBUS
);
3510 handle_signal ("SIGSEGV", SIGSEGV
);
3513 handle_signal ("SIGSYS", SIGSYS
);
3516 handle_signal ("SIGPIPE", SIGPIPE
);
3519 handle_signal ("SIGALRM", SIGALRM
);
3522 handle_signal ("SIGTERM", SIGTERM
);
3525 handle_signal ("SIGURG", SIGURG
);
3528 handle_signal ("SIGSTOP", SIGSTOP
);
3531 handle_signal ("SIGTSTP", SIGTSTP
);
3534 handle_signal ("SIGCONT", SIGCONT
);
3537 handle_signal ("SIGCHLD", SIGCHLD
);
3540 handle_signal ("SIGTTIN", SIGTTIN
);
3543 handle_signal ("SIGTTOU", SIGTTOU
);
3546 handle_signal ("SIGIO", SIGIO
);
3549 handle_signal ("SIGXCPU", SIGXCPU
);
3552 handle_signal ("SIGXFSZ", SIGXFSZ
);
3555 handle_signal ("SIGVTALRM", SIGVTALRM
);
3558 handle_signal ("SIGPROF", SIGPROF
);
3561 handle_signal ("SIGWINCH", SIGWINCH
);
3564 handle_signal ("SIGINFO", SIGINFO
);
3567 handle_signal ("SIGUSR1", SIGUSR1
);
3570 handle_signal ("SIGUSR2", SIGUSR2
);
3573 error ("Undefined signal name %s", name
);
3576 #undef handle_signal
3578 return make_number (kill (XINT (pid
), XINT (sigcode
)));
3581 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
3582 "Make PROCESS see end-of-file in its input.\n\
3583 Eof comes after any text already sent to it.\n\
3584 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3585 nil, indicating the current buffer's process.\n\
3586 If PROCESS is a network connection, or is a process communicating\n\
3587 through a pipe (as opposed to a pty), then you cannot send any more\n\
3588 text to PROCESS after you call this function.")
3590 Lisp_Object process
;
3594 proc
= get_process (process
);
3596 /* Make sure the process is really alive. */
3597 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3598 update_status (XPROCESS (proc
));
3599 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3600 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
3603 send_process (proc
, "\032", 1, Qnil
); /* ^z */
3605 if (!NILP (XPROCESS (proc
)->pty_flag
))
3606 send_process (proc
, "\004", 1, Qnil
);
3609 close (XINT (XPROCESS (proc
)->outfd
));
3610 XSETINT (XPROCESS (proc
)->outfd
, open (NULL_DEVICE
, O_WRONLY
));
3616 /* Kill all processes associated with `buffer'.
3617 If `buffer' is nil, kill all processes */
3619 kill_buffer_processes (buffer
)
3622 Lisp_Object tail
, proc
;
3624 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3626 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3627 if (GC_PROCESSP (proc
)
3628 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
3630 if (NETCONN_P (proc
))
3631 Fdelete_process (proc
);
3632 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
3633 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
3638 /* On receipt of a signal that a child status has changed,
3639 loop asking about children with changed statuses until
3640 the system says there are no more.
3641 All we do is change the status;
3642 we do not run sentinels or print notifications.
3643 That is saved for the next time keyboard input is done,
3644 in order to avoid timing errors. */
3646 /** WARNING: this can be called during garbage collection.
3647 Therefore, it must not be fooled by the presence of mark bits in
3650 /** USG WARNING: Although it is not obvious from the documentation
3651 in signal(2), on a USG system the SIGCLD handler MUST NOT call
3652 signal() before executing at least one wait(), otherwise the handler
3653 will be called again, resulting in an infinite loop. The relevant
3654 portion of the documentation reads "SIGCLD signals will be queued
3655 and the signal-catching function will be continually reentered until
3656 the queue is empty". Invoking signal() causes the kernel to reexamine
3657 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
3660 sigchld_handler (signo
)
3663 int old_errno
= errno
;
3665 register struct Lisp_Process
*p
;
3666 extern EMACS_TIME
*input_available_clear_time
;
3670 sigheld
|= sigbit (SIGCHLD
);
3682 #endif /* no WUNTRACED */
3683 /* Keep trying to get a status until we get a definitive result. */
3687 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
3689 while (pid
<= 0 && errno
== EINTR
);
3693 /* A real failure. We have done all our job, so return. */
3695 /* USG systems forget handlers when they are used;
3696 must reestablish each time */
3697 #if defined (USG) && !defined (POSIX_SIGNALS)
3698 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
3701 sigheld
&= ~sigbit (SIGCHLD
);
3709 #endif /* no WNOHANG */
3711 /* Find the process that signaled us, and record its status. */
3714 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3716 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3717 p
= XPROCESS (proc
);
3718 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
3723 /* Look for an asynchronous process whose pid hasn't been filled
3726 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3728 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3729 p
= XPROCESS (proc
);
3730 if (INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
3735 /* Change the status of the process that was found. */
3738 union { int i
; WAITTYPE wt
; } u
;
3739 int clear_desc_flag
= 0;
3741 XSETINT (p
->tick
, ++process_tick
);
3743 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
3744 XSETINT (p
->raw_status_high
, u
.i
>> 16);
3746 /* If process has terminated, stop waiting for its output. */
3747 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
3748 && XINT (p
->infd
) >= 0)
3749 clear_desc_flag
= 1;
3751 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
3752 if (clear_desc_flag
)
3754 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
3755 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
3758 /* Tell wait_reading_process_input that it needs to wake up and
3760 if (input_available_clear_time
)
3761 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3764 /* There was no asynchronous process found for that id. Check
3765 if we have a synchronous process. */
3768 synch_process_alive
= 0;
3770 /* Report the status of the synchronous process. */
3772 synch_process_retcode
= WRETCODE (w
);
3773 else if (WIFSIGNALED (w
))
3775 int code
= WTERMSIG (w
);
3781 /* Suppress warning if the table has const char *. */
3782 signame
= (char *) sys_siglist
[code
];
3784 signame
= sys_errlist
[code
];
3788 signame
= "unknown";
3790 synch_process_death
= signame
;
3793 /* Tell wait_reading_process_input that it needs to wake up and
3795 if (input_available_clear_time
)
3796 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3799 /* On some systems, we must return right away.
3800 If any more processes want to signal us, we will
3802 Otherwise (on systems that have WNOHANG), loop around
3803 to use up all the processes that have something to tell us. */
3804 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT)
3805 #if defined (USG) && ! defined (POSIX_SIGNALS)
3806 signal (signo
, sigchld_handler
);
3810 #endif /* USG, but not HPUX with WNOHANG */
3816 exec_sentinel_unwind (data
)
3819 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
3824 exec_sentinel_error_handler (error
)
3827 cmd_error_internal (error
, "error in process sentinel: ");
3829 update_echo_area ();
3830 Fsleep_for (make_number (2), Qnil
);
3834 exec_sentinel (proc
, reason
)
3835 Lisp_Object proc
, reason
;
3837 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
3838 register struct Lisp_Process
*p
= XPROCESS (proc
);
3839 int count
= specpdl_ptr
- specpdl
;
3840 int outer_running_asynch_code
= running_asynch_code
;
3842 /* No need to gcpro these, because all we do with them later
3843 is test them for EQness, and none of them should be a string. */
3844 odeactivate
= Vdeactivate_mark
;
3845 XSETBUFFER (obuffer
, current_buffer
);
3846 okeymap
= current_buffer
->keymap
;
3848 sentinel
= p
->sentinel
;
3849 if (NILP (sentinel
))
3852 /* Zilch the sentinel while it's running, to avoid recursive invocations;
3853 assure that it gets restored no matter how the sentinel exits. */
3855 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
3856 /* Inhibit quit so that random quits don't screw up a running filter. */
3857 specbind (Qinhibit_quit
, Qt
);
3858 specbind (Qlast_nonmenu_event
, Qt
);
3860 /* In case we get recursively called,
3861 and we already saved the match data nonrecursively,
3862 save the same match data in safely recursive fashion. */
3863 if (outer_running_asynch_code
)
3866 tem
= Fmatch_data (Qnil
, Qnil
);
3867 restore_match_data ();
3868 record_unwind_protect (Fstore_match_data
, Fmatch_data (Qnil
, Qnil
));
3869 Fstore_match_data (tem
);
3872 /* For speed, if a search happens within this code,
3873 save the match data in a special nonrecursive fashion. */
3874 running_asynch_code
= 1;
3876 internal_condition_case_1 (read_process_output_call
,
3878 Fcons (proc
, Fcons (reason
, Qnil
))),
3879 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
3880 exec_sentinel_error_handler
);
3882 /* If we saved the match data nonrecursively, restore it now. */
3883 restore_match_data ();
3884 running_asynch_code
= outer_running_asynch_code
;
3886 Vdeactivate_mark
= odeactivate
;
3888 if (! EQ (Fcurrent_buffer (), obuffer
)
3889 || ! EQ (current_buffer
->keymap
, okeymap
))
3891 /* But do it only if the caller is actually going to read events.
3892 Otherwise there's no need to make him wake up, and it could
3893 cause trouble (for example it would make Fsit_for return). */
3894 if (waiting_for_user_input_p
== -1)
3895 record_asynch_buffer_change ();
3897 unbind_to (count
, Qnil
);
3900 /* Report all recent events of a change in process status
3901 (either run the sentinel or output a message).
3902 This is done while Emacs is waiting for keyboard input. */
3906 register Lisp_Object proc
, buffer
;
3907 Lisp_Object tail
, msg
;
3908 struct gcpro gcpro1
, gcpro2
;
3912 /* We need to gcpro tail; if read_process_output calls a filter
3913 which deletes a process and removes the cons to which tail points
3914 from Vprocess_alist, and then causes a GC, tail is an unprotected
3918 /* Set this now, so that if new processes are created by sentinels
3919 that we run, we get called again to handle their status changes. */
3920 update_tick
= process_tick
;
3922 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
3925 register struct Lisp_Process
*p
;
3927 proc
= Fcdr (Fcar (tail
));
3928 p
= XPROCESS (proc
);
3930 if (XINT (p
->tick
) != XINT (p
->update_tick
))
3932 XSETINT (p
->update_tick
, XINT (p
->tick
));
3934 /* If process is still active, read any output that remains. */
3935 while (! EQ (p
->filter
, Qt
)
3936 && XINT (p
->infd
) >= 0
3937 && read_process_output (proc
, XINT (p
->infd
)) > 0);
3941 /* Get the text to use for the message. */
3942 if (!NILP (p
->raw_status_low
))
3944 msg
= status_message (p
->status
);
3946 /* If process is terminated, deactivate it or delete it. */
3948 if (CONSP (p
->status
))
3949 symbol
= XCONS (p
->status
)->car
;
3951 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
3952 || EQ (symbol
, Qclosed
))
3954 if (delete_exited_processes
)
3955 remove_process (proc
);
3957 deactivate_process (proc
);
3960 /* The actions above may have further incremented p->tick.
3961 So set p->update_tick again
3962 so that an error in the sentinel will not cause
3963 this code to be run again. */
3964 XSETINT (p
->update_tick
, XINT (p
->tick
));
3965 /* Now output the message suitably. */
3966 if (!NILP (p
->sentinel
))
3967 exec_sentinel (proc
, msg
);
3968 /* Don't bother with a message in the buffer
3969 when a process becomes runnable. */
3970 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
3972 Lisp_Object ro
, tem
;
3973 struct buffer
*old
= current_buffer
;
3977 ro
= XBUFFER (buffer
)->read_only
;
3979 /* Avoid error if buffer is deleted
3980 (probably that's why the process is dead, too) */
3981 if (NILP (XBUFFER (buffer
)->name
))
3983 Fset_buffer (buffer
);
3986 /* Insert new output into buffer
3987 at the current end-of-output marker,
3988 thus preserving logical ordering of input and output. */
3989 if (XMARKER (p
->mark
)->buffer
)
3990 SET_PT (marker_position (p
->mark
));
3996 tem
= current_buffer
->read_only
;
3997 current_buffer
->read_only
= Qnil
;
3998 insert_string ("\nProcess ");
3999 Finsert (1, &p
->name
);
4000 insert_string (" ");
4002 current_buffer
->read_only
= tem
;
4003 Fset_marker (p
->mark
, make_number (PT
), p
->buffer
);
4005 if (opoint
>= before
)
4006 SET_PT (opoint
+ (PT
- before
));
4010 set_buffer_internal (old
);
4015 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
4016 redisplay_preserve_echo_area ();
4022 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
4023 Sset_process_coding_system
, 1, 3, 0,
4024 "Set coding-systems of PROCESS to DECODING (input from the process) and\n\
4025 ENCODING (output to the process).")
4026 (proc
, decoding
, encoding
)
4027 register Lisp_Object proc
, decoding
, encoding
;
4029 register struct Lisp_Process
*p
;
4031 CHECK_PROCESS (proc
, 0);
4032 p
= XPROCESS (proc
);
4033 if (XINT (p
->infd
) < 0)
4034 error ("Input file descriptor of %s closed", XSTRING (p
->name
)->data
);
4035 if (XINT (p
->outfd
) < 0)
4036 error ("Output file descriptor of %s closed", XSTRING (p
->name
)->data
);
4038 p
->decode_coding_system
= Fcheck_coding_system (decoding
);
4039 p
->encode_coding_system
= Fcheck_coding_system (encoding
);
4040 setup_coding_system (decoding
,
4041 proc_decode_coding_system
[XINT (p
->infd
)]);
4042 setup_coding_system (encoding
,
4043 proc_encode_coding_system
[XINT (p
->outfd
)]);
4048 DEFUN ("process-coding-system",
4049 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
4050 "Return a cons of coding-system for decoding and encoding of PROCESS.")
4052 register Lisp_Object proc
;
4054 CHECK_PROCESS (proc
, 0);
4055 return Fcons (XPROCESS (proc
)->decode_coding_system
,
4056 XPROCESS (proc
)->encode_coding_system
);
4059 /* The first time this is called, assume keyboard input comes from DESC
4060 instead of from where we used to expect it.
4061 Subsequent calls mean assume input keyboard can come from DESC
4062 in addition to other places. */
4064 static int add_keyboard_wait_descriptor_called_flag
;
4067 add_keyboard_wait_descriptor (desc
)
4070 if (! add_keyboard_wait_descriptor_called_flag
)
4071 FD_CLR (0, &input_wait_mask
);
4072 add_keyboard_wait_descriptor_called_flag
= 1;
4073 FD_SET (desc
, &input_wait_mask
);
4074 FD_SET (desc
, &non_process_wait_mask
);
4075 if (desc
> max_keyboard_desc
)
4076 max_keyboard_desc
= desc
;
4079 /* From now on, do not expect DESC to give keyboard input. */
4082 delete_keyboard_wait_descriptor (desc
)
4086 int lim
= max_keyboard_desc
;
4088 FD_CLR (desc
, &input_wait_mask
);
4089 FD_CLR (desc
, &non_process_wait_mask
);
4091 if (desc
== max_keyboard_desc
)
4092 for (fd
= 0; fd
< lim
; fd
++)
4093 if (FD_ISSET (fd
, &input_wait_mask
)
4094 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
4095 max_keyboard_desc
= fd
;
4098 /* Return nonzero if *MASK has a bit set
4099 that corresponds to one of the keyboard input descriptors. */
4102 keyboard_bit_set (mask
)
4107 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
4108 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
4109 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
4121 if (! noninteractive
|| initialized
)
4123 signal (SIGCHLD
, sigchld_handler
);
4126 FD_ZERO (&input_wait_mask
);
4127 FD_ZERO (&non_keyboard_wait_mask
);
4128 FD_ZERO (&non_process_wait_mask
);
4129 max_process_desc
= 0;
4131 FD_SET (0, &input_wait_mask
);
4133 Vprocess_alist
= Qnil
;
4134 for (i
= 0; i
< MAXDESC
; i
++)
4136 chan_process
[i
] = Qnil
;
4137 proc_buffered_char
[i
] = -1;
4139 bzero (proc_decode_coding_system
, sizeof proc_decode_coding_system
);
4140 bzero (proc_encode_coding_system
, sizeof proc_encode_coding_system
);
4145 Qprocessp
= intern ("processp");
4146 staticpro (&Qprocessp
);
4147 Qrun
= intern ("run");
4149 Qstop
= intern ("stop");
4151 Qsignal
= intern ("signal");
4152 staticpro (&Qsignal
);
4154 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
4157 Qexit = intern ("exit");
4158 staticpro (&Qexit); */
4160 Qopen
= intern ("open");
4162 Qclosed
= intern ("closed");
4163 staticpro (&Qclosed
);
4165 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
4166 staticpro (&Qlast_nonmenu_event
);
4168 staticpro (&Vprocess_alist
);
4170 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
4171 "*Non-nil means delete processes immediately when they exit.\n\
4172 nil means don't delete them until `list-processes' is run.");
4174 delete_exited_processes
= 1;
4176 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
4177 "Control type of device used to communicate with subprocesses.\n\
4178 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
4179 The value has no effect if the system has no ptys or if all ptys are busy:\n\
4180 then a pipe is used in any case.\n\
4181 The value takes effect when `start-process' is called.");
4182 Vprocess_connection_type
= Qt
;
4184 defsubr (&Sprocessp
);
4185 defsubr (&Sget_process
);
4186 defsubr (&Sget_buffer_process
);
4187 defsubr (&Sdelete_process
);
4188 defsubr (&Sprocess_status
);
4189 defsubr (&Sprocess_exit_status
);
4190 defsubr (&Sprocess_id
);
4191 defsubr (&Sprocess_name
);
4192 defsubr (&Sprocess_tty_name
);
4193 defsubr (&Sprocess_command
);
4194 defsubr (&Sset_process_buffer
);
4195 defsubr (&Sprocess_buffer
);
4196 defsubr (&Sprocess_mark
);
4197 defsubr (&Sset_process_filter
);
4198 defsubr (&Sprocess_filter
);
4199 defsubr (&Sset_process_sentinel
);
4200 defsubr (&Sprocess_sentinel
);
4201 defsubr (&Sset_process_window_size
);
4202 defsubr (&Sprocess_kill_without_query
);
4203 defsubr (&Sprocess_contact
);
4204 defsubr (&Slist_processes
);
4205 defsubr (&Sprocess_list
);
4206 defsubr (&Sstart_process
);
4208 defsubr (&Sopen_network_stream
);
4209 #endif /* HAVE_SOCKETS */
4210 defsubr (&Saccept_process_output
);
4211 defsubr (&Sprocess_send_region
);
4212 defsubr (&Sprocess_send_string
);
4213 defsubr (&Sinterrupt_process
);
4214 defsubr (&Skill_process
);
4215 defsubr (&Squit_process
);
4216 defsubr (&Sstop_process
);
4217 defsubr (&Scontinue_process
);
4218 defsubr (&Sprocess_send_eof
);
4219 defsubr (&Ssignal_process
);
4220 defsubr (&Swaiting_for_user_input_p
);
4221 /* defsubr (&Sprocess_connection); */
4222 defsubr (&Sset_process_coding_system
);
4223 defsubr (&Sprocess_coding_system
);
4227 #else /* not subprocesses */
4229 #include <sys/types.h>
4233 #include "systime.h"
4234 #include "termopts.h"
4235 #include "sysselect.h"
4237 extern int frame_garbaged
;
4239 extern EMACS_TIME
timer_check ();
4240 extern int timers_run
;
4242 /* As described above, except assuming that there are no subprocesses:
4244 Wait for timeout to elapse and/or keyboard input to be available.
4247 timeout in seconds, or
4248 zero for no limit, or
4249 -1 means gobble data immediately available but don't wait for any.
4251 read_kbd is a Lisp_Object:
4252 0 to ignore keyboard input, or
4253 1 to return when input is available, or
4254 -1 means caller will actually read the input, so don't throw to
4256 a cons cell, meaning wait until its car is non-nil
4257 (and gobble terminal input into the buffer if any arrives), or
4258 We know that read_kbd will never be a Lisp_Process, since
4259 `subprocesses' isn't defined.
4261 do_display != 0 means redisplay should be done to show subprocess
4262 output that arrives.
4264 Return true iff we received input from any process. */
4267 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
4268 int time_limit
, microsecs
;
4269 Lisp_Object read_kbd
;
4272 EMACS_TIME end_time
, timeout
;
4273 SELECT_TYPE waitchannels
;
4275 Lisp_Object
*wait_for_cell
= 0;
4277 /* If waiting for non-nil in a cell, record where. */
4278 if (CONSP (read_kbd
))
4280 wait_for_cell
= &XCONS (read_kbd
)->car
;
4281 XSETFASTINT (read_kbd
, 0);
4284 /* What does time_limit really mean? */
4285 if (time_limit
|| microsecs
)
4287 if (time_limit
== -1)
4288 /* In fact, it's zero. */
4289 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4291 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4293 /* How far in the future is that? */
4294 EMACS_GET_TIME (end_time
);
4295 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4298 /* It's infinite. */
4299 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4301 /* Turn off periodic alarms (in case they are in use)
4302 because the select emulator uses alarms. */
4308 int timeout_reduced_for_timers
= 0;
4310 /* If calling from keyboard input, do not quit
4311 since we want to return C-g as an input character.
4312 Otherwise, do pending quit if requested. */
4313 if (XINT (read_kbd
) >= 0)
4316 /* Exit now if the cell we're waiting for became non-nil. */
4317 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
4320 /* Compute time from now till when time limit is up */
4321 /* Exit if already run out */
4322 if (time_limit
> 0 || microsecs
)
4324 EMACS_GET_TIME (timeout
);
4325 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4326 if (EMACS_TIME_NEG_P (timeout
))
4330 /* If our caller will not immediately handle keyboard events,
4331 run timer events directly.
4332 (Callers that will immediately read keyboard events
4333 call timer_delay on their own.) */
4334 if (! wait_for_cell
)
4336 EMACS_TIME timer_delay
;
4340 old_timers_run
= timers_run
;
4341 timer_delay
= timer_check (1);
4342 if (timers_run
!= old_timers_run
&& do_display
)
4344 redisplay_preserve_echo_area ();
4345 /* We must retry, since a timer may have requeued itself
4346 and that could alter the time delay. */
4350 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4352 EMACS_TIME difference
;
4353 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4354 if (EMACS_TIME_NEG_P (difference
))
4356 timeout
= timer_delay
;
4357 timeout_reduced_for_timers
= 1;
4362 /* Cause C-g and alarm signals to take immediate action,
4363 and cause input available signals to zero out timeout. */
4364 if (XINT (read_kbd
) < 0)
4365 set_waiting_for_input (&timeout
);
4367 /* Wait till there is something to do. */
4369 if (! XINT (read_kbd
) && wait_for_cell
== 0)
4370 FD_ZERO (&waitchannels
);
4372 FD_SET (0, &waitchannels
);
4374 /* If a frame has been newly mapped and needs updating,
4375 reprocess its display stuff. */
4376 if (frame_garbaged
&& do_display
)
4378 clear_waiting_for_input ();
4379 redisplay_preserve_echo_area ();
4380 if (XINT (read_kbd
) < 0)
4381 set_waiting_for_input (&timeout
);
4384 if (XINT (read_kbd
) && detect_input_pending ())
4387 FD_ZERO (&waitchannels
);
4390 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
4395 /* Make C-g and alarm signals set flags again */
4396 clear_waiting_for_input ();
4398 /* If we woke up due to SIGWINCH, actually change size now. */
4399 do_pending_window_change ();
4401 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4402 /* We waited the full specified time, so return now. */
4407 /* If the system call was interrupted, then go around the
4409 if (xerrno
== EINTR
)
4410 FD_ZERO (&waitchannels
);
4412 error ("select error: %s", strerror (xerrno
));
4415 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
4416 /* System sometimes fails to deliver SIGIO. */
4417 kill (getpid (), SIGIO
);
4420 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
4421 kill (getpid (), SIGIO
);
4424 /* Check for keyboard input */
4426 if ((XINT (read_kbd
) != 0)
4427 && detect_input_pending_run_timers (do_display
))
4429 swallow_events (do_display
);
4430 if (detect_input_pending_run_timers (do_display
))
4434 /* If wait_for_cell. check for keyboard input
4435 but don't run any timers.
4436 ??? (It seems wrong to me to check for keyboard
4437 input at all when wait_for_cell, but the code
4438 has been this way since July 1994.
4439 Try changing this after version 19.31.) */
4441 && detect_input_pending ())
4443 swallow_events (do_display
);
4444 if (detect_input_pending ())
4448 /* Exit now if the cell we're waiting for became non-nil. */
4449 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
4459 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
4460 /* Don't confuse make-docfile by having two doc strings for this function.
4461 make-docfile does not pay attention to #if, for good reason! */
4464 register Lisp_Object name
;
4469 /* Kill all processes associated with `buffer'.
4470 If `buffer' is nil, kill all processes.
4471 Since we have no subprocesses, this does nothing. */
4473 kill_buffer_processes (buffer
)
4484 defsubr (&Sget_buffer_process
);
4488 #endif /* not subprocesses */