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 (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
2253 EMACS_TIME difference
;
2254 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
2255 if (EMACS_TIME_NEG_P (difference
))
2257 timeout
= timer_delay
;
2258 timeout_reduced_for_timers
= 1;
2261 /* If time_limit is -1, we are not going to wait at all. */
2262 else if (time_limit
!= -1)
2264 /* This is so a breakpoint can be put here. */
2265 wait_reading_process_input_1 ();
2269 /* Cause C-g and alarm signals to take immediate action,
2270 and cause input available signals to zero out timeout.
2272 It is important that we do this before checking for process
2273 activity. If we get a SIGCHLD after the explicit checks for
2274 process activity, timeout is the only way we will know. */
2275 if (XINT (read_kbd
) < 0)
2276 set_waiting_for_input (&timeout
);
2278 /* If status of something has changed, and no input is
2279 available, notify the user of the change right away. After
2280 this explicit check, we'll let the SIGCHLD handler zap
2281 timeout to get our attention. */
2282 if (update_tick
!= process_tick
&& do_display
)
2284 Atemp
= input_wait_mask
;
2285 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2286 if ((select (MAXDESC
, &Atemp
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2290 /* It's okay for us to do this and then continue with
2291 the loop, since timeout has already been zeroed out. */
2292 clear_waiting_for_input ();
2297 /* Don't wait for output from a non-running process. */
2298 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
2299 update_status (wait_proc
);
2301 && ! EQ (wait_proc
->status
, Qrun
))
2303 clear_waiting_for_input ();
2307 /* Wait till there is something to do */
2310 Available
= non_process_wait_mask
;
2311 else if (! XINT (read_kbd
))
2312 Available
= non_keyboard_wait_mask
;
2314 Available
= input_wait_mask
;
2316 /* If frame size has changed or the window is newly mapped,
2317 redisplay now, before we start to wait. There is a race
2318 condition here; if a SIGIO arrives between now and the select
2319 and indicates that a frame is trashed, the select may block
2320 displaying a trashed screen. */
2321 if (frame_garbaged
&& do_display
)
2323 clear_waiting_for_input ();
2324 redisplay_preserve_echo_area ();
2325 if (XINT (read_kbd
) < 0)
2326 set_waiting_for_input (&timeout
);
2329 if (XINT (read_kbd
) && detect_input_pending ())
2332 FD_ZERO (&Available
);
2335 nfds
= select (MAXDESC
, &Available
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2340 /* Make C-g and alarm signals set flags again */
2341 clear_waiting_for_input ();
2343 /* If we woke up due to SIGWINCH, actually change size now. */
2344 do_pending_window_change ();
2346 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
2347 /* We wanted the full specified time, so return now. */
2351 if (xerrno
== EINTR
)
2352 FD_ZERO (&Available
);
2354 /* Ultrix select seems to return ENOMEM when it is
2355 interrupted. Treat it just like EINTR. Bleah. Note
2356 that we want to test for the "ultrix" CPP symbol, not
2357 "__ultrix__"; the latter is only defined under GCC, but
2358 not by DEC's bundled CC. -JimB */
2359 else if (xerrno
== ENOMEM
)
2360 FD_ZERO (&Available
);
2363 /* This happens for no known reason on ALLIANT.
2364 I am guessing that this is the right response. -- RMS. */
2365 else if (xerrno
== EFAULT
)
2366 FD_ZERO (&Available
);
2368 else if (xerrno
== EBADF
)
2371 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
2372 the child's closure of the pts gives the parent a SIGHUP, and
2373 the ptc file descriptor is automatically closed,
2374 yielding EBADF here or at select() call above.
2375 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
2376 in m/ibmrt-aix.h), and here we just ignore the select error.
2377 Cleanup occurs c/o status_notify after SIGCLD. */
2378 FD_ZERO (&Available
); /* Cannot depend on values returned */
2384 error ("select error: %s", strerror (xerrno
));
2386 #if defined(sun) && !defined(USG5_4)
2387 else if (nfds
> 0 && keyboard_bit_set (&Available
)
2389 /* System sometimes fails to deliver SIGIO.
2391 David J. Mackenzie says that Emacs doesn't compile under
2392 Solaris if this code is enabled, thus the USG5_4 in the CPP
2393 conditional. "I haven't noticed any ill effects so far.
2394 If you find a Solaris expert somewhere, they might know
2396 kill (getpid (), SIGIO
);
2399 /* Check for keyboard input */
2400 /* If there is any, return immediately
2401 to give it higher priority than subprocesses */
2403 if ((XINT (read_kbd
) != 0)
2404 && detect_input_pending_run_timers (do_display
))
2406 swallow_events (do_display
);
2407 if (detect_input_pending_run_timers (do_display
))
2411 /* If wait_for_cell. check for keyboard input
2412 but don't run any timers.
2413 ??? (It seems wrong to me to check for keyboard
2414 input at all when wait_for_cell, but the code
2415 has been this way since July 1994.
2416 Try changing this after version 19.31.) */
2418 && detect_input_pending ())
2420 swallow_events (do_display
);
2421 if (detect_input_pending ())
2425 /* Exit now if the cell we're waiting for became non-nil. */
2426 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2430 /* If we think we have keyboard input waiting, but didn't get SIGIO
2431 go read it. This can happen with X on BSD after logging out.
2432 In that case, there really is no input and no SIGIO,
2433 but select says there is input. */
2435 if (XINT (read_kbd
) && interrupt_input
2436 && (keyboard_bit_set (&Available
)))
2437 kill (getpid (), SIGIO
);
2441 got_some_input
|= nfds
> 0;
2443 /* If checking input just got us a size-change event from X,
2444 obey it now if we should. */
2445 if (XINT (read_kbd
) || wait_for_cell
)
2446 do_pending_window_change ();
2448 /* Check for data from a process. */
2449 /* Really FIRST_PROC_DESC should be 0 on Unix,
2450 but this is safer in the short run. */
2451 for (channel
= 0; channel
<= max_process_desc
; channel
++)
2453 if (FD_ISSET (channel
, &Available
)
2454 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
2458 /* If waiting for this channel, arrange to return as
2459 soon as no more input to be processed. No more
2461 if (wait_channel
== channel
)
2467 proc
= chan_process
[channel
];
2471 /* Read data from the process, starting with our
2472 buffered-ahead character if we have one. */
2474 nread
= read_process_output (proc
, channel
);
2477 /* Since read_process_output can run a filter,
2478 which can call accept-process-output,
2479 don't try to read from any other processes
2480 before doing the select again. */
2481 FD_ZERO (&Available
);
2484 redisplay_preserve_echo_area ();
2487 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2490 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
2491 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
2493 else if (nread
== -1 && errno
== EAGAIN
)
2497 else if (nread
== -1 && errno
== EAGAIN
)
2499 /* Note that we cannot distinguish between no input
2500 available now and a closed pipe.
2501 With luck, a closed pipe will be accompanied by
2502 subprocess termination and SIGCHLD. */
2503 else if (nread
== 0 && !NETCONN_P (proc
))
2505 #endif /* O_NDELAY */
2506 #endif /* O_NONBLOCK */
2508 /* On some OSs with ptys, when the process on one end of
2509 a pty exits, the other end gets an error reading with
2510 errno = EIO instead of getting an EOF (0 bytes read).
2511 Therefore, if we get an error reading and errno =
2512 EIO, just continue, because the child process has
2513 exited and should clean itself up soon (e.g. when we
2515 else if (nread
== -1 && errno
== EIO
)
2517 #endif /* HAVE_PTYS */
2518 /* If we can detect process termination, don't consider the process
2519 gone just because its pipe is closed. */
2521 else if (nread
== 0 && !NETCONN_P (proc
))
2526 /* Preserve status of processes already terminated. */
2527 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2528 deactivate_process (proc
);
2529 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2530 update_status (XPROCESS (proc
));
2531 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2532 XPROCESS (proc
)->status
2533 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2536 } /* end for each file descriptor */
2537 } /* end while exit conditions not met */
2539 waiting_for_user_input_p
= 0;
2541 /* If calling from keyboard input, do not quit
2542 since we want to return C-g as an input character.
2543 Otherwise, do pending quit if requested. */
2544 if (XINT (read_kbd
) >= 0)
2546 /* Prevent input_pending from remaining set if we quit. */
2547 clear_input_pending ();
2551 /* AlainF 5-Jul-1996
2552 HP-UX 10.10 seems to have problems with signals coming in
2553 Causes "poll: interrupted system call" messages when Emacs is run
2555 Turn periodic alarms back on */
2559 return got_some_input
;
2562 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
2565 read_process_output_call (fun_and_args
)
2566 Lisp_Object fun_and_args
;
2568 return apply1 (XCONS (fun_and_args
)->car
, XCONS (fun_and_args
)->cdr
);
2572 read_process_output_error_handler (error
)
2575 cmd_error_internal (error
, "error in process filter: ");
2577 update_echo_area ();
2578 Fsleep_for (make_number (2), Qnil
);
2582 #define READ_CHILD_OUTPUT read_child_output
2584 #define READ_CHILD_OUTPUT read
2587 /* Read pending output from the process channel,
2588 starting with our buffered-ahead character if we have one.
2589 Yield number of decoded characters read.
2591 This function reads at most 1024 characters.
2592 If you want to read all available subprocess output,
2593 you must call it repeatedly until it returns zero.
2595 The characters read are decoded according to PROC's coding-system
2598 read_process_output (proc
, channel
)
2600 register int channel
;
2602 register int nchars
;
2605 int chars_allocated
= 0; /* If 1, `chars' should be freed later. */
2609 register Lisp_Object outstream
;
2610 register struct buffer
*old
= current_buffer
;
2611 register struct Lisp_Process
*p
= XPROCESS (proc
);
2612 register int opoint
;
2613 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
2614 int chars_in_decoding_buf
= 0; /* If 1, `chars' points
2615 XSTRING (p->decoding_buf)->data. */
2618 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2620 vs
= get_vms_process_pointer (p
->pid
);
2624 return(0); /* Really weird if it does this */
2625 if (!(vs
->iosb
[0] & 1))
2626 return -1; /* I/O error */
2629 error ("Could not get VMS process pointer");
2630 chars
= vs
->inputBuffer
;
2631 nchars
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2634 start_vms_process_read (vs
); /* Crank up the next read on the process */
2635 return 1; /* Nothing worth printing, say we got 1 */
2637 if (coding
->carryover_size
)
2639 /* The data carried over in the previous decoding should be
2640 prepended to the new data read to decode all together. */
2641 char *buf
= (char *) xmalloc (nchars
+ coding
->carryover_size
);
2643 bcopy (coding
->carryover
, buf
, coding
->carryover_size
);
2644 bcopy (chars
, buf
+ coding
->carryover_size
, nchars
);
2646 chars_allocated
= 1;
2650 if (coding
->carryover_size
)
2651 /* The data carried over in the previous decoding should be
2652 prepended to the new data read to decode all together. */
2653 bcopy (coding
->carryover
, buf
, coding
->carryover_size
);
2655 if (proc_buffered_char
[channel
] < 0)
2656 nchars
= READ_CHILD_OUTPUT (channel
, buf
+ coding
->carryover_size
,
2657 (sizeof buf
) - coding
->carryover_size
);
2660 buf
[coding
->carryover_size
] = proc_buffered_char
[channel
];
2661 proc_buffered_char
[channel
] = -1;
2662 nchars
= READ_CHILD_OUTPUT (channel
, buf
+ coding
->carryover_size
+ 1,
2663 (sizeof buf
) - coding
->carryover_size
- 1);
2667 nchars
= nchars
+ 1;
2670 #endif /* not VMS */
2672 /* At this point, NCHARS holds number of characters just received
2673 (including the one in proc_buffered_char[channel]). */
2674 if (nchars
<= 0) return nchars
;
2676 /* Now set NCHARS how many bytes we must decode. */
2677 nchars
+= coding
->carryover_size
;
2679 if (CODING_REQUIRE_CONVERSION (coding
))
2681 int require
= decoding_buffer_size (coding
, nchars
);
2682 int consumed
, produced
;
2684 if (XSTRING (p
->decoding_buf
)->size
< require
)
2685 p
->decoding_buf
= make_uninit_string (require
);
2686 produced
= decode_coding (coding
, chars
, XSTRING (p
->decoding_buf
)->data
,
2687 nchars
, XSTRING (p
->decoding_buf
)->size
,
2690 /* New coding-system might be found by `decode_coding'. */
2691 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
2693 p
->decode_coding_system
= coding
->symbol
;
2694 setup_coding_system (coding
->symbol
,
2695 proc_decode_coding_system
[channel
]);
2696 /* If coding-system for encoding is not yet decided, we set it
2697 as the same as coding-system for decoding. */
2698 if (NILP (p
->encode_coding_system
))
2700 p
->encode_coding_system
= coding
->symbol
;
2701 setup_coding_system (coding
->symbol
,
2702 proc_encode_coding_system
[channel
]);
2706 /* Now we don't need the contents of `chars'. */
2707 if (chars_allocated
)
2712 chars
= XSTRING (p
->decoding_buf
)->data
;
2714 chars_in_decoding_buf
= 1;
2717 else if (chars_allocated
)
2719 /* Although we don't have to decode the received data, we must
2720 move it to an area which we don't have to free. */
2721 if (! STRINGP (p
->decoding_buf
)
2722 || XSTRING (p
->decoding_buf
)->size
< nchars
)
2723 p
->decoding_buf
= make_uninit_string (nchars
);
2724 bcopy (chars
, XSTRING (p
->decoding_buf
)->data
, nchars
);
2726 chars
= XSTRING (p
->decoding_buf
)->data
;
2727 chars_in_decoding_buf
= 1;
2731 outstream
= p
->filter
;
2732 if (!NILP (outstream
))
2734 /* We inhibit quit here instead of just catching it so that
2735 hitting ^G when a filter happens to be running won't screw
2737 int count
= specpdl_ptr
- specpdl
;
2738 Lisp_Object odeactivate
;
2739 Lisp_Object obuffer
, okeymap
;
2740 int outer_running_asynch_code
= running_asynch_code
;
2742 /* No need to gcpro these, because all we do with them later
2743 is test them for EQness, and none of them should be a string. */
2744 odeactivate
= Vdeactivate_mark
;
2745 XSETBUFFER (obuffer
, current_buffer
);
2746 okeymap
= current_buffer
->keymap
;
2748 specbind (Qinhibit_quit
, Qt
);
2749 specbind (Qlast_nonmenu_event
, Qt
);
2751 /* In case we get recursively called,
2752 and we already saved the match data nonrecursively,
2753 save the same match data in safely recursive fashion. */
2754 if (outer_running_asynch_code
)
2757 /* Don't clobber the CURRENT match data, either! */
2758 tem
= Fmatch_data (Qnil
, Qnil
);
2759 restore_match_data ();
2760 record_unwind_protect (Fstore_match_data
, Fmatch_data (Qnil
, Qnil
));
2761 Fstore_match_data (tem
);
2764 /* For speed, if a search happens within this code,
2765 save the match data in a special nonrecursive fashion. */
2766 running_asynch_code
= 1;
2768 /* Read and dispose of the process output. */
2769 internal_condition_case_1 (read_process_output_call
,
2772 Fcons (make_string (chars
,
2775 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
2776 read_process_output_error_handler
);
2778 /* If we saved the match data nonrecursively, restore it now. */
2779 restore_match_data ();
2780 running_asynch_code
= outer_running_asynch_code
;
2782 /* Handling the process output should not deactivate the mark. */
2783 Vdeactivate_mark
= odeactivate
;
2785 #if 0 /* Call record_asynch_buffer_change unconditionally,
2786 because we might have changed minor modes or other things
2787 that affect key bindings. */
2788 if (! EQ (Fcurrent_buffer (), obuffer
)
2789 || ! EQ (current_buffer
->keymap
, okeymap
))
2791 /* But do it only if the caller is actually going to read events.
2792 Otherwise there's no need to make him wake up, and it could
2793 cause trouble (for example it would make Fsit_for return). */
2794 if (waiting_for_user_input_p
== -1)
2795 record_asynch_buffer_change ();
2798 start_vms_process_read (vs
);
2800 unbind_to (count
, Qnil
);
2804 /* If no filter, write into buffer if it isn't dead. */
2805 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2807 Lisp_Object old_read_only
;
2808 int old_begv
, old_zv
;
2809 Lisp_Object odeactivate
;
2812 odeactivate
= Vdeactivate_mark
;
2814 Fset_buffer (p
->buffer
);
2816 old_read_only
= current_buffer
->read_only
;
2820 current_buffer
->read_only
= Qnil
;
2822 /* Insert new output into buffer
2823 at the current end-of-output marker,
2824 thus preserving logical ordering of input and output. */
2825 if (XMARKER (p
->mark
)->buffer
)
2826 SET_PT (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
));
2831 /* If the output marker is outside of the visible region, save
2832 the restriction and widen. */
2833 if (! (BEGV
<= PT
&& PT
<= ZV
))
2836 /* Insert before markers in case we are inserting where
2837 the buffer's mark is, and the user's next command is Meta-y. */
2838 if (chars_in_decoding_buf
)
2839 insert_from_string_before_markers (p
->decoding_buf
, 0, nchars
, 0);
2841 insert_before_markers (chars
, nchars
);
2842 Fset_marker (p
->mark
, make_number (PT
), p
->buffer
);
2844 update_mode_lines
++;
2846 /* Make sure opoint and the old restrictions
2847 float ahead of any new text just as point would. */
2848 if (opoint
>= before
)
2849 opoint
+= PT
- before
;
2850 if (old_begv
> before
)
2851 old_begv
+= PT
- before
;
2852 if (old_zv
>= before
)
2853 old_zv
+= PT
- before
;
2855 /* If the restriction isn't what it should be, set it. */
2856 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
2857 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
2859 /* Handling the process output should not deactivate the mark. */
2860 Vdeactivate_mark
= odeactivate
;
2862 current_buffer
->read_only
= old_read_only
;
2864 set_buffer_internal (old
);
2867 start_vms_process_read (vs
);
2872 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
2874 "Returns non-nil if emacs is waiting for input from the user.\n\
2875 This is intended for use by asynchronous process output filters and sentinels.")
2878 return (waiting_for_user_input_p
? Qt
: Qnil
);
2881 /* Sending data to subprocess */
2883 jmp_buf send_process_frame
;
2886 send_process_trap ()
2892 longjmp (send_process_frame
, 1);
2895 /* Send some data to process PROC.
2896 BUF is the beginning of the data; LEN is the number of characters.
2897 OBJECT is the Lisp object that the data comes from.
2899 The data is encoded by PROC's coding-system for encoding before it
2900 is sent. But if the data ends at the middle of multi-byte
2901 representation, that incomplete sequence of bytes are sent without
2902 being encoded. Should we store them in a buffer to prepend them to
2903 the data send later? */
2905 send_process (proc
, buf
, len
, object
)
2906 volatile Lisp_Object proc
;
2911 /* Use volatile to protect variables from being clobbered by longjmp. */
2913 volatile unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
2914 struct coding_system
*coding
;
2915 struct gcpro gcpro1
;
2920 struct Lisp_Process
*p
= XPROCESS (proc
);
2921 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2924 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2925 update_status (XPROCESS (proc
));
2926 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2927 error ("Process %s not running", procname
);
2928 if (XINT (XPROCESS (proc
)->outfd
) < 0)
2929 error ("Output file descriptor of %s is closed", procname
);
2931 coding
= proc_encode_coding_system
[XINT (XPROCESS (proc
)->outfd
)];
2932 if (CODING_REQUIRE_CONVERSION (coding
))
2934 int require
= encoding_buffer_size (coding
, len
);
2936 char *temp_buf
= NULL
;
2938 /* Remember the offset of data because a string or a buffer may
2939 be relocated. Setting OFFSET to -1 means we don't have to
2941 offset
= (BUFFERP (object
)
2942 ? BUF_PTR_CHAR_POS (XBUFFER (object
), (unsigned char *) buf
)
2944 ? offset
= buf
- (char *) XSTRING (object
)->data
2947 if (coding
->carryover_size
> 0)
2949 temp_buf
= (char *) xmalloc (len
+ coding
->carryover_size
);
2953 if (BUFFERP (object
))
2954 buf
= (char *) BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
2955 else if (STRINGP (object
))
2956 buf
= offset
+ (char *) XSTRING (object
)->data
;
2957 /* Now we don't have to care relocation. */
2960 bcopy (coding
->carryover
, temp_buf
, coding
->carryover_size
);
2961 bcopy (buf
, temp_buf
+ coding
->carryover_size
, len
);
2965 if (XSTRING (XPROCESS (proc
)->encoding_buf
)->size
< require
)
2967 XPROCESS (proc
)->encoding_buf
= make_uninit_string (require
);
2971 if (BUFFERP (object
))
2972 buf
= (char *) BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
2973 else if (STRINGP (object
))
2974 buf
= offset
+ (char *) XSTRING (object
)->data
;
2977 object
= XPROCESS (proc
)->encoding_buf
;
2978 len
= encode_coding (coding
, buf
, XSTRING (object
)->data
,
2979 len
, XSTRING (object
)->size
, &dummy
);
2980 buf
= XSTRING (object
)->data
;
2986 vs
= get_vms_process_pointer (p
->pid
);
2988 error ("Could not find this process: %x", p
->pid
);
2989 else if (write_to_vms_process (vs
, buf
, len
))
2993 if (pty_max_bytes
== 0)
2995 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
2996 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
2998 if (pty_max_bytes
< 0)
2999 pty_max_bytes
= 250;
3001 pty_max_bytes
= 250;
3003 /* Deduct one, to leave space for the eof. */
3007 if (!setjmp (send_process_frame
))
3011 SIGTYPE (*old_sigpipe
)();
3014 /* Decide how much data we can send in one batch.
3015 Long lines need to be split into multiple batches. */
3016 if (!NILP (XPROCESS (proc
)->pty_flag
))
3018 /* Starting this at zero is always correct when not the first iteration
3019 because the previous iteration ended by sending C-d.
3020 It may not be correct for the first iteration
3021 if a partial line was sent in a separate send_process call.
3022 If that proves worth handling, we need to save linepos
3023 in the process object. */
3026 char *end
= buf
+ len
;
3028 /* Scan through this text for a line that is too long. */
3029 while (ptr
!= end
&& linepos
< pty_max_bytes
)
3037 /* If we found one, break the line there
3038 and put in a C-d to force the buffer through. */
3042 /* Send this batch, using one or more write calls. */
3045 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
3046 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
3047 signal (SIGPIPE
, old_sigpipe
);
3053 || errno
== EWOULDBLOCK
3059 /* Buffer is full. Wait, accepting input;
3060 that may allow the program
3061 to finish doing output and read more. */
3066 /* Running filters might relocate buffers or strings.
3067 Arrange to relocate BUF. */
3068 if (BUFFERP (object
))
3069 offset
= BUF_PTR_CHAR_POS (XBUFFER (object
),
3070 (unsigned char *) buf
);
3071 else if (STRINGP (object
))
3072 offset
= buf
- (char *) XSTRING (object
)->data
;
3074 XSETFASTINT (zero
, 0);
3075 #ifdef EMACS_HAS_USECS
3076 wait_reading_process_input (0, 20000, zero
, 0);
3078 wait_reading_process_input (1, 0, zero
, 0);
3081 if (BUFFERP (object
))
3082 buf
= (char *) BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
3083 else if (STRINGP (object
))
3084 buf
= offset
+ (char *) XSTRING (object
)->data
;
3089 /* This is a real error. */
3090 report_file_error ("writing to process", Fcons (proc
, Qnil
));
3097 /* If we sent just part of the string, put in an EOF
3098 to force it through, before we send the rest. */
3100 Fprocess_send_eof (proc
);
3105 XPROCESS (proc
)->raw_status_low
= Qnil
;
3106 XPROCESS (proc
)->raw_status_high
= Qnil
;
3107 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
3108 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
3109 deactivate_process (proc
);
3111 error ("Error writing to process %s; closed it", procname
);
3113 error ("SIGPIPE raised on process %s; closed it", procname
);
3120 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
3122 "Send current contents of region as input to PROCESS.\n\
3123 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3124 nil, indicating the current buffer's process.\n\
3125 Called from program, takes three arguments, PROCESS, START and END.\n\
3126 If the region is more than 500 characters long,\n\
3127 it is sent in several bunches. This may happen even for shorter regions.\n\
3128 Output from processes can arrive in between bunches.")
3129 (process
, start
, end
)
3130 Lisp_Object process
, start
, end
;
3135 proc
= get_process (process
);
3136 validate_region (&start
, &end
);
3138 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
3141 start1
= XINT (start
);
3142 send_process (proc
, POS_ADDR (start1
), XINT (end
) - XINT (start
),
3143 Fcurrent_buffer ());
3148 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
3150 "Send PROCESS the contents of STRING as input.\n\
3151 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3152 nil, indicating the current buffer's process.\n\
3153 If STRING is more than 500 characters long,\n\
3154 it is sent in several bunches. This may happen even for shorter strings.\n\
3155 Output from processes can arrive in between bunches.")
3157 Lisp_Object process
, string
;
3160 CHECK_STRING (string
, 1);
3161 proc
= get_process (process
);
3162 send_process (proc
, XSTRING (string
)->data
, XSTRING (string
)->size
, string
);
3166 /* send a signal number SIGNO to PROCESS.
3167 CURRENT_GROUP means send to the process group that currently owns
3168 the terminal being used to communicate with PROCESS.
3169 This is used for various commands in shell mode.
3170 If NOMSG is zero, insert signal-announcements into process's buffers
3173 If we can, we try to signal PROCESS by sending control characters
3174 down the pty. This allows us to signal inferiors who have changed
3175 their uid, for which killpg would return an EPERM error. */
3178 process_send_signal (process
, signo
, current_group
, nomsg
)
3179 Lisp_Object process
;
3181 Lisp_Object current_group
;
3185 register struct Lisp_Process
*p
;
3189 proc
= get_process (process
);
3190 p
= XPROCESS (proc
);
3192 if (!EQ (p
->childp
, Qt
))
3193 error ("Process %s is not a subprocess",
3194 XSTRING (p
->name
)->data
);
3195 if (XINT (p
->infd
) < 0)
3196 error ("Process %s is not active",
3197 XSTRING (p
->name
)->data
);
3199 if (NILP (p
->pty_flag
))
3200 current_group
= Qnil
;
3202 /* If we are using pgrps, get a pgrp number and make it negative. */
3203 if (!NILP (current_group
))
3205 #ifdef SIGNALS_VIA_CHARACTERS
3206 /* If possible, send signals to the entire pgrp
3207 by sending an input character to it. */
3209 /* TERMIOS is the latest and bestest, and seems most likely to
3210 work. If the system has it, use it. */
3217 tcgetattr (XINT (p
->infd
), &t
);
3218 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
3222 tcgetattr (XINT (p
->infd
), &t
);
3223 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
3227 tcgetattr (XINT (p
->infd
), &t
);
3228 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
3229 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
3231 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
3236 #else /* ! HAVE_TERMIOS */
3238 /* On Berkeley descendants, the following IOCTL's retrieve the
3239 current control characters. */
3240 #if defined (TIOCGLTC) && defined (TIOCGETC)
3248 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
3249 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
3252 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
3253 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
3257 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
3258 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
3260 #endif /* ! defined (SIGTSTP) */
3263 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
3265 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
3272 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3273 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
3276 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3277 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
3281 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3282 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
3284 #endif /* ! defined (SIGTSTP) */
3286 #else /* ! defined (TCGETA) */
3287 Your configuration files are messed up
.
3288 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
3289 you'd better be using one of the alternatives above! */
3290 #endif /* ! defined (TCGETA) */
3291 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
3292 #endif /* ! defined HAVE_TERMIOS */
3293 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
3296 /* Get the pgrp using the tty itself, if we have that.
3297 Otherwise, use the pty to get the pgrp.
3298 On pfa systems, saka@pfu.fujitsu.co.JP writes:
3299 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
3300 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
3301 His patch indicates that if TIOCGPGRP returns an error, then
3302 we should just assume that p->pid is also the process group id. */
3306 if (!NILP (p
->subtty
))
3307 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
3309 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
3313 gid
= - XFASTINT (p
->pid
);
3314 #endif /* ! defined (pfa) */
3320 #else /* ! defined (TIOCGPGRP ) */
3321 /* Can't select pgrps on this system, so we know that
3322 the child itself heads the pgrp. */
3323 gid
= - XFASTINT (p
->pid
);
3324 #endif /* ! defined (TIOCGPGRP ) */
3327 gid
= - XFASTINT (p
->pid
);
3333 p
->raw_status_low
= Qnil
;
3334 p
->raw_status_high
= Qnil
;
3336 XSETINT (p
->tick
, ++process_tick
);
3340 #endif /* ! defined (SIGCONT) */
3343 send_process (proc
, "\003", 1, Qnil
); /* ^C */
3348 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
3353 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
3356 flush_pending_output (XINT (p
->infd
));
3360 /* If we don't have process groups, send the signal to the immediate
3361 subprocess. That isn't really right, but it's better than any
3362 obvious alternative. */
3365 kill (XFASTINT (p
->pid
), signo
);
3369 /* gid may be a pid, or minus a pgrp's number */
3371 if (!NILP (current_group
))
3372 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
3375 gid
= - XFASTINT (p
->pid
);
3378 #else /* ! defined (TIOCSIGSEND) */
3379 EMACS_KILLPG (-gid
, signo
);
3380 #endif /* ! defined (TIOCSIGSEND) */
3383 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
3384 "Interrupt process PROCESS. May be process or name of one.\n\
3385 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
3386 nil or no arg means current buffer's process.\n\
3387 Second arg CURRENT-GROUP non-nil means send signal to\n\
3388 the current process-group of the process's controlling terminal\n\
3389 rather than to the process's own process group.\n\
3390 If the process is a shell, this means interrupt current subjob\n\
3391 rather than the shell.")
3392 (process
, current_group
)
3393 Lisp_Object process
, current_group
;
3395 process_send_signal (process
, SIGINT
, current_group
, 0);
3399 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
3400 "Kill process PROCESS. May be process or name of one.\n\
3401 See function `interrupt-process' for more details on usage.")
3402 (process
, current_group
)
3403 Lisp_Object process
, current_group
;
3405 process_send_signal (process
, SIGKILL
, current_group
, 0);
3409 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
3410 "Send QUIT signal to 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
, SIGQUIT
, current_group
, 0);
3419 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
3420 "Stop 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
;
3426 error ("no SIGTSTP support");
3428 process_send_signal (process
, SIGTSTP
, current_group
, 0);
3433 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
3434 "Continue process PROCESS. May be process or name of one.\n\
3435 See function `interrupt-process' for more details on usage.")
3436 (process
, current_group
)
3437 Lisp_Object process
, current_group
;
3440 process_send_signal (process
, SIGCONT
, current_group
, 0);
3442 error ("no SIGCONT support");
3447 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
3448 2, 2, "nProcess number: \nnSignal code: ",
3449 "Send the process with process id PID the signal with code SIGCODE.\n\
3450 PID must be an integer. The process need not be a child of this Emacs.\n\
3451 SIGCODE may be an integer, or a symbol whose name is a signal name.")
3453 Lisp_Object pid
, sigcode
;
3455 CHECK_NUMBER (pid
, 0);
3457 #define handle_signal(NAME, VALUE) \
3458 else if (!strcmp (name, NAME)) \
3459 XSETINT (sigcode, VALUE)
3461 if (INTEGERP (sigcode
))
3465 unsigned char *name
;
3467 CHECK_SYMBOL (sigcode
, 1);
3468 name
= XSYMBOL (sigcode
)->name
->data
;
3473 handle_signal ("SIGHUP", SIGHUP
);
3476 handle_signal ("SIGINT", SIGINT
);
3479 handle_signal ("SIGQUIT", SIGQUIT
);
3482 handle_signal ("SIGILL", SIGILL
);
3485 handle_signal ("SIGABRT", SIGABRT
);
3488 handle_signal ("SIGEMT", SIGEMT
);
3491 handle_signal ("SIGKILL", SIGKILL
);
3494 handle_signal ("SIGFPE", SIGFPE
);
3497 handle_signal ("SIGBUS", SIGBUS
);
3500 handle_signal ("SIGSEGV", SIGSEGV
);
3503 handle_signal ("SIGSYS", SIGSYS
);
3506 handle_signal ("SIGPIPE", SIGPIPE
);
3509 handle_signal ("SIGALRM", SIGALRM
);
3512 handle_signal ("SIGTERM", SIGTERM
);
3515 handle_signal ("SIGURG", SIGURG
);
3518 handle_signal ("SIGSTOP", SIGSTOP
);
3521 handle_signal ("SIGTSTP", SIGTSTP
);
3524 handle_signal ("SIGCONT", SIGCONT
);
3527 handle_signal ("SIGCHLD", SIGCHLD
);
3530 handle_signal ("SIGTTIN", SIGTTIN
);
3533 handle_signal ("SIGTTOU", SIGTTOU
);
3536 handle_signal ("SIGIO", SIGIO
);
3539 handle_signal ("SIGXCPU", SIGXCPU
);
3542 handle_signal ("SIGXFSZ", SIGXFSZ
);
3545 handle_signal ("SIGVTALRM", SIGVTALRM
);
3548 handle_signal ("SIGPROF", SIGPROF
);
3551 handle_signal ("SIGWINCH", SIGWINCH
);
3554 handle_signal ("SIGINFO", SIGINFO
);
3557 handle_signal ("SIGUSR1", SIGUSR1
);
3560 handle_signal ("SIGUSR2", SIGUSR2
);
3563 error ("Undefined signal name %s", name
);
3566 #undef handle_signal
3568 return make_number (kill (XINT (pid
), XINT (sigcode
)));
3571 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
3572 "Make PROCESS see end-of-file in its input.\n\
3573 Eof comes after any text already sent to it.\n\
3574 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3575 nil, indicating the current buffer's process.\n\
3576 If PROCESS is a network connection, or is a process communicating\n\
3577 through a pipe (as opposed to a pty), then you cannot send any more\n\
3578 text to PROCESS after you call this function.")
3580 Lisp_Object process
;
3584 proc
= get_process (process
);
3586 /* Make sure the process is really alive. */
3587 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3588 update_status (XPROCESS (proc
));
3589 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3590 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
3593 send_process (proc
, "\032", 1, Qnil
); /* ^z */
3595 if (!NILP (XPROCESS (proc
)->pty_flag
))
3596 send_process (proc
, "\004", 1, Qnil
);
3599 close (XINT (XPROCESS (proc
)->outfd
));
3600 XSETINT (XPROCESS (proc
)->outfd
, open (NULL_DEVICE
, O_WRONLY
));
3606 /* Kill all processes associated with `buffer'.
3607 If `buffer' is nil, kill all processes */
3609 kill_buffer_processes (buffer
)
3612 Lisp_Object tail
, proc
;
3614 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3616 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3617 if (GC_PROCESSP (proc
)
3618 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
3620 if (NETCONN_P (proc
))
3621 Fdelete_process (proc
);
3622 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
3623 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
3628 /* On receipt of a signal that a child status has changed,
3629 loop asking about children with changed statuses until
3630 the system says there are no more.
3631 All we do is change the status;
3632 we do not run sentinels or print notifications.
3633 That is saved for the next time keyboard input is done,
3634 in order to avoid timing errors. */
3636 /** WARNING: this can be called during garbage collection.
3637 Therefore, it must not be fooled by the presence of mark bits in
3640 /** USG WARNING: Although it is not obvious from the documentation
3641 in signal(2), on a USG system the SIGCLD handler MUST NOT call
3642 signal() before executing at least one wait(), otherwise the handler
3643 will be called again, resulting in an infinite loop. The relevant
3644 portion of the documentation reads "SIGCLD signals will be queued
3645 and the signal-catching function will be continually reentered until
3646 the queue is empty". Invoking signal() causes the kernel to reexamine
3647 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
3650 sigchld_handler (signo
)
3653 int old_errno
= errno
;
3655 register struct Lisp_Process
*p
;
3656 extern EMACS_TIME
*input_available_clear_time
;
3660 sigheld
|= sigbit (SIGCHLD
);
3672 #endif /* no WUNTRACED */
3673 /* Keep trying to get a status until we get a definitive result. */
3677 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
3679 while (pid
<= 0 && errno
== EINTR
);
3683 /* A real failure. We have done all our job, so return. */
3685 /* USG systems forget handlers when they are used;
3686 must reestablish each time */
3687 #if defined (USG) && !defined (POSIX_SIGNALS)
3688 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
3691 sigheld
&= ~sigbit (SIGCHLD
);
3699 #endif /* no WNOHANG */
3701 /* Find the process that signaled us, and record its status. */
3704 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3706 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3707 p
= XPROCESS (proc
);
3708 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
3713 /* Look for an asynchronous process whose pid hasn't been filled
3716 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3718 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3719 p
= XPROCESS (proc
);
3720 if (INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
3725 /* Change the status of the process that was found. */
3728 union { int i
; WAITTYPE wt
; } u
;
3729 int clear_desc_flag
= 0;
3731 XSETINT (p
->tick
, ++process_tick
);
3733 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
3734 XSETINT (p
->raw_status_high
, u
.i
>> 16);
3736 /* If process has terminated, stop waiting for its output. */
3737 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
3738 && XINT (p
->infd
) >= 0)
3739 clear_desc_flag
= 1;
3741 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
3742 if (clear_desc_flag
)
3744 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
3745 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
3748 /* Tell wait_reading_process_input that it needs to wake up and
3750 if (input_available_clear_time
)
3751 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3754 /* There was no asynchronous process found for that id. Check
3755 if we have a synchronous process. */
3758 synch_process_alive
= 0;
3760 /* Report the status of the synchronous process. */
3762 synch_process_retcode
= WRETCODE (w
);
3763 else if (WIFSIGNALED (w
))
3765 int code
= WTERMSIG (w
);
3771 /* Suppress warning if the table has const char *. */
3772 signame
= (char *) sys_siglist
[code
];
3774 signame
= sys_errlist
[code
];
3778 signame
= "unknown";
3780 synch_process_death
= signame
;
3783 /* Tell wait_reading_process_input that it needs to wake up and
3785 if (input_available_clear_time
)
3786 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3789 /* On some systems, we must return right away.
3790 If any more processes want to signal us, we will
3792 Otherwise (on systems that have WNOHANG), loop around
3793 to use up all the processes that have something to tell us. */
3794 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT)
3795 #if defined (USG) && ! defined (POSIX_SIGNALS)
3796 signal (signo
, sigchld_handler
);
3800 #endif /* USG, but not HPUX with WNOHANG */
3806 exec_sentinel_unwind (data
)
3809 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
3814 exec_sentinel_error_handler (error
)
3817 cmd_error_internal (error
, "error in process sentinel: ");
3819 update_echo_area ();
3820 Fsleep_for (make_number (2), Qnil
);
3824 exec_sentinel (proc
, reason
)
3825 Lisp_Object proc
, reason
;
3827 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
3828 register struct Lisp_Process
*p
= XPROCESS (proc
);
3829 int count
= specpdl_ptr
- specpdl
;
3830 int outer_running_asynch_code
= running_asynch_code
;
3832 /* No need to gcpro these, because all we do with them later
3833 is test them for EQness, and none of them should be a string. */
3834 odeactivate
= Vdeactivate_mark
;
3835 XSETBUFFER (obuffer
, current_buffer
);
3836 okeymap
= current_buffer
->keymap
;
3838 sentinel
= p
->sentinel
;
3839 if (NILP (sentinel
))
3842 /* Zilch the sentinel while it's running, to avoid recursive invocations;
3843 assure that it gets restored no matter how the sentinel exits. */
3845 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
3846 /* Inhibit quit so that random quits don't screw up a running filter. */
3847 specbind (Qinhibit_quit
, Qt
);
3848 specbind (Qlast_nonmenu_event
, Qt
);
3850 /* In case we get recursively called,
3851 and we already saved the match data nonrecursively,
3852 save the same match data in safely recursive fashion. */
3853 if (outer_running_asynch_code
)
3856 tem
= Fmatch_data (Qnil
, Qnil
);
3857 restore_match_data ();
3858 record_unwind_protect (Fstore_match_data
, Fmatch_data (Qnil
, Qnil
));
3859 Fstore_match_data (tem
);
3862 /* For speed, if a search happens within this code,
3863 save the match data in a special nonrecursive fashion. */
3864 running_asynch_code
= 1;
3866 internal_condition_case_1 (read_process_output_call
,
3868 Fcons (proc
, Fcons (reason
, Qnil
))),
3869 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
3870 exec_sentinel_error_handler
);
3872 /* If we saved the match data nonrecursively, restore it now. */
3873 restore_match_data ();
3874 running_asynch_code
= outer_running_asynch_code
;
3876 Vdeactivate_mark
= odeactivate
;
3878 if (! EQ (Fcurrent_buffer (), obuffer
)
3879 || ! EQ (current_buffer
->keymap
, okeymap
))
3881 /* But do it only if the caller is actually going to read events.
3882 Otherwise there's no need to make him wake up, and it could
3883 cause trouble (for example it would make Fsit_for return). */
3884 if (waiting_for_user_input_p
== -1)
3885 record_asynch_buffer_change ();
3887 unbind_to (count
, Qnil
);
3890 /* Report all recent events of a change in process status
3891 (either run the sentinel or output a message).
3892 This is done while Emacs is waiting for keyboard input. */
3896 register Lisp_Object proc
, buffer
;
3897 Lisp_Object tail
, msg
;
3898 struct gcpro gcpro1
, gcpro2
;
3902 /* We need to gcpro tail; if read_process_output calls a filter
3903 which deletes a process and removes the cons to which tail points
3904 from Vprocess_alist, and then causes a GC, tail is an unprotected
3908 /* Set this now, so that if new processes are created by sentinels
3909 that we run, we get called again to handle their status changes. */
3910 update_tick
= process_tick
;
3912 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
3915 register struct Lisp_Process
*p
;
3917 proc
= Fcdr (Fcar (tail
));
3918 p
= XPROCESS (proc
);
3920 if (XINT (p
->tick
) != XINT (p
->update_tick
))
3922 XSETINT (p
->update_tick
, XINT (p
->tick
));
3924 /* If process is still active, read any output that remains. */
3925 while (! EQ (p
->filter
, Qt
)
3926 && XINT (p
->infd
) >= 0
3927 && read_process_output (proc
, XINT (p
->infd
)) > 0);
3931 /* Get the text to use for the message. */
3932 if (!NILP (p
->raw_status_low
))
3934 msg
= status_message (p
->status
);
3936 /* If process is terminated, deactivate it or delete it. */
3938 if (CONSP (p
->status
))
3939 symbol
= XCONS (p
->status
)->car
;
3941 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
3942 || EQ (symbol
, Qclosed
))
3944 if (delete_exited_processes
)
3945 remove_process (proc
);
3947 deactivate_process (proc
);
3950 /* The actions above may have further incremented p->tick.
3951 So set p->update_tick again
3952 so that an error in the sentinel will not cause
3953 this code to be run again. */
3954 XSETINT (p
->update_tick
, XINT (p
->tick
));
3955 /* Now output the message suitably. */
3956 if (!NILP (p
->sentinel
))
3957 exec_sentinel (proc
, msg
);
3958 /* Don't bother with a message in the buffer
3959 when a process becomes runnable. */
3960 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
3962 Lisp_Object ro
, tem
;
3963 struct buffer
*old
= current_buffer
;
3967 ro
= XBUFFER (buffer
)->read_only
;
3969 /* Avoid error if buffer is deleted
3970 (probably that's why the process is dead, too) */
3971 if (NILP (XBUFFER (buffer
)->name
))
3973 Fset_buffer (buffer
);
3976 /* Insert new output into buffer
3977 at the current end-of-output marker,
3978 thus preserving logical ordering of input and output. */
3979 if (XMARKER (p
->mark
)->buffer
)
3980 SET_PT (marker_position (p
->mark
));
3986 tem
= current_buffer
->read_only
;
3987 current_buffer
->read_only
= Qnil
;
3988 insert_string ("\nProcess ");
3989 Finsert (1, &p
->name
);
3990 insert_string (" ");
3992 current_buffer
->read_only
= tem
;
3993 Fset_marker (p
->mark
, make_number (PT
), p
->buffer
);
3995 if (opoint
>= before
)
3996 SET_PT (opoint
+ (PT
- before
));
4000 set_buffer_internal (old
);
4005 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
4006 redisplay_preserve_echo_area ();
4012 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
4013 Sset_process_coding_system
, 1, 3, 0,
4014 "Set coding-systems of PROCESS to DECODING (input from the process) and\n\
4015 ENCODING (output to the process).")
4016 (proc
, decoding
, encoding
)
4017 register Lisp_Object proc
, decoding
, encoding
;
4019 register struct Lisp_Process
*p
;
4021 CHECK_PROCESS (proc
, 0);
4022 p
= XPROCESS (proc
);
4023 if (XINT (p
->infd
) < 0)
4024 error ("Input file descriptor of %s closed", XSTRING (p
->name
)->data
);
4025 if (XINT (p
->outfd
) < 0)
4026 error ("Output file descriptor of %s closed", XSTRING (p
->name
)->data
);
4028 p
->decode_coding_system
= Fcheck_coding_system (decoding
);
4029 p
->encode_coding_system
= Fcheck_coding_system (encoding
);
4030 setup_coding_system (decoding
,
4031 proc_decode_coding_system
[XINT (p
->infd
)]);
4032 setup_coding_system (encoding
,
4033 proc_encode_coding_system
[XINT (p
->outfd
)]);
4038 DEFUN ("process-coding-system",
4039 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
4040 "Return a cons of coding-system for decoding and encoding of PROCESS.")
4042 register Lisp_Object proc
;
4044 CHECK_PROCESS (proc
, 0);
4045 return Fcons (XPROCESS (proc
)->decode_coding_system
,
4046 XPROCESS (proc
)->encode_coding_system
);
4049 /* The first time this is called, assume keyboard input comes from DESC
4050 instead of from where we used to expect it.
4051 Subsequent calls mean assume input keyboard can come from DESC
4052 in addition to other places. */
4054 static int add_keyboard_wait_descriptor_called_flag
;
4057 add_keyboard_wait_descriptor (desc
)
4060 if (! add_keyboard_wait_descriptor_called_flag
)
4061 FD_CLR (0, &input_wait_mask
);
4062 add_keyboard_wait_descriptor_called_flag
= 1;
4063 FD_SET (desc
, &input_wait_mask
);
4064 FD_SET (desc
, &non_process_wait_mask
);
4065 if (desc
> max_keyboard_desc
)
4066 max_keyboard_desc
= desc
;
4069 /* From now on, do not expect DESC to give keyboard input. */
4072 delete_keyboard_wait_descriptor (desc
)
4076 int lim
= max_keyboard_desc
;
4078 FD_CLR (desc
, &input_wait_mask
);
4079 FD_CLR (desc
, &non_process_wait_mask
);
4081 if (desc
== max_keyboard_desc
)
4082 for (fd
= 0; fd
< lim
; fd
++)
4083 if (FD_ISSET (fd
, &input_wait_mask
)
4084 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
4085 max_keyboard_desc
= fd
;
4088 /* Return nonzero if *MASK has a bit set
4089 that corresponds to one of the keyboard input descriptors. */
4092 keyboard_bit_set (mask
)
4097 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
4098 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
4099 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
4111 if (! noninteractive
|| initialized
)
4113 signal (SIGCHLD
, sigchld_handler
);
4116 FD_ZERO (&input_wait_mask
);
4117 FD_ZERO (&non_keyboard_wait_mask
);
4118 FD_ZERO (&non_process_wait_mask
);
4119 max_process_desc
= 0;
4121 FD_SET (0, &input_wait_mask
);
4123 Vprocess_alist
= Qnil
;
4124 for (i
= 0; i
< MAXDESC
; i
++)
4126 chan_process
[i
] = Qnil
;
4127 proc_buffered_char
[i
] = -1;
4129 bzero (proc_decode_coding_system
, sizeof proc_decode_coding_system
);
4130 bzero (proc_encode_coding_system
, sizeof proc_encode_coding_system
);
4135 Qprocessp
= intern ("processp");
4136 staticpro (&Qprocessp
);
4137 Qrun
= intern ("run");
4139 Qstop
= intern ("stop");
4141 Qsignal
= intern ("signal");
4142 staticpro (&Qsignal
);
4144 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
4147 Qexit = intern ("exit");
4148 staticpro (&Qexit); */
4150 Qopen
= intern ("open");
4152 Qclosed
= intern ("closed");
4153 staticpro (&Qclosed
);
4155 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
4156 staticpro (&Qlast_nonmenu_event
);
4158 staticpro (&Vprocess_alist
);
4160 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
4161 "*Non-nil means delete processes immediately when they exit.\n\
4162 nil means don't delete them until `list-processes' is run.");
4164 delete_exited_processes
= 1;
4166 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
4167 "Control type of device used to communicate with subprocesses.\n\
4168 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
4169 The value has no effect if the system has no ptys or if all ptys are busy:\n\
4170 then a pipe is used in any case.\n\
4171 The value takes effect when `start-process' is called.");
4172 Vprocess_connection_type
= Qt
;
4174 defsubr (&Sprocessp
);
4175 defsubr (&Sget_process
);
4176 defsubr (&Sget_buffer_process
);
4177 defsubr (&Sdelete_process
);
4178 defsubr (&Sprocess_status
);
4179 defsubr (&Sprocess_exit_status
);
4180 defsubr (&Sprocess_id
);
4181 defsubr (&Sprocess_name
);
4182 defsubr (&Sprocess_tty_name
);
4183 defsubr (&Sprocess_command
);
4184 defsubr (&Sset_process_buffer
);
4185 defsubr (&Sprocess_buffer
);
4186 defsubr (&Sprocess_mark
);
4187 defsubr (&Sset_process_filter
);
4188 defsubr (&Sprocess_filter
);
4189 defsubr (&Sset_process_sentinel
);
4190 defsubr (&Sprocess_sentinel
);
4191 defsubr (&Sset_process_window_size
);
4192 defsubr (&Sprocess_kill_without_query
);
4193 defsubr (&Sprocess_contact
);
4194 defsubr (&Slist_processes
);
4195 defsubr (&Sprocess_list
);
4196 defsubr (&Sstart_process
);
4198 defsubr (&Sopen_network_stream
);
4199 #endif /* HAVE_SOCKETS */
4200 defsubr (&Saccept_process_output
);
4201 defsubr (&Sprocess_send_region
);
4202 defsubr (&Sprocess_send_string
);
4203 defsubr (&Sinterrupt_process
);
4204 defsubr (&Skill_process
);
4205 defsubr (&Squit_process
);
4206 defsubr (&Sstop_process
);
4207 defsubr (&Scontinue_process
);
4208 defsubr (&Sprocess_send_eof
);
4209 defsubr (&Ssignal_process
);
4210 defsubr (&Swaiting_for_user_input_p
);
4211 /* defsubr (&Sprocess_connection); */
4212 defsubr (&Sset_process_coding_system
);
4213 defsubr (&Sprocess_coding_system
);
4217 #else /* not subprocesses */
4219 #include <sys/types.h>
4223 #include "systime.h"
4224 #include "termopts.h"
4225 #include "sysselect.h"
4227 extern int frame_garbaged
;
4229 extern EMACS_TIME
timer_check ();
4230 extern int timers_run
;
4232 /* As described above, except assuming that there are no subprocesses:
4234 Wait for timeout to elapse and/or keyboard input to be available.
4237 timeout in seconds, or
4238 zero for no limit, or
4239 -1 means gobble data immediately available but don't wait for any.
4241 read_kbd is a Lisp_Object:
4242 0 to ignore keyboard input, or
4243 1 to return when input is available, or
4244 -1 means caller will actually read the input, so don't throw to
4246 a cons cell, meaning wait until its car is non-nil
4247 (and gobble terminal input into the buffer if any arrives), or
4248 We know that read_kbd will never be a Lisp_Process, since
4249 `subprocesses' isn't defined.
4251 do_display != 0 means redisplay should be done to show subprocess
4252 output that arrives.
4254 Return true iff we received input from any process. */
4257 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
4258 int time_limit
, microsecs
;
4259 Lisp_Object read_kbd
;
4262 EMACS_TIME end_time
, timeout
;
4263 SELECT_TYPE waitchannels
;
4265 Lisp_Object
*wait_for_cell
= 0;
4267 /* If waiting for non-nil in a cell, record where. */
4268 if (CONSP (read_kbd
))
4270 wait_for_cell
= &XCONS (read_kbd
)->car
;
4271 XSETFASTINT (read_kbd
, 0);
4274 /* What does time_limit really mean? */
4275 if (time_limit
|| microsecs
)
4277 if (time_limit
== -1)
4278 /* In fact, it's zero. */
4279 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4281 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4283 /* How far in the future is that? */
4284 EMACS_GET_TIME (end_time
);
4285 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4288 /* It's infinite. */
4289 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4291 /* Turn off periodic alarms (in case they are in use)
4292 because the select emulator uses alarms. */
4298 int timeout_reduced_for_timers
= 0;
4300 /* If calling from keyboard input, do not quit
4301 since we want to return C-g as an input character.
4302 Otherwise, do pending quit if requested. */
4303 if (XINT (read_kbd
) >= 0)
4306 /* Exit now if the cell we're waiting for became non-nil. */
4307 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
4310 /* Compute time from now till when time limit is up */
4311 /* Exit if already run out */
4312 if (time_limit
> 0 || microsecs
)
4314 EMACS_GET_TIME (timeout
);
4315 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4316 if (EMACS_TIME_NEG_P (timeout
))
4320 /* If our caller will not immediately handle keyboard events,
4321 run timer events directly.
4322 (Callers that will immediately read keyboard events
4323 call timer_delay on their own.) */
4324 if (! wait_for_cell
)
4326 EMACS_TIME timer_delay
;
4330 old_timers_run
= timers_run
;
4331 timer_delay
= timer_check (1);
4332 if (timers_run
!= old_timers_run
&& do_display
)
4334 redisplay_preserve_echo_area ();
4335 /* We must retry, since a timer may have requeued itself
4336 and that could alter the time delay. */
4340 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4342 EMACS_TIME difference
;
4343 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4344 if (EMACS_TIME_NEG_P (difference
))
4346 timeout
= timer_delay
;
4347 timeout_reduced_for_timers
= 1;
4352 /* Cause C-g and alarm signals to take immediate action,
4353 and cause input available signals to zero out timeout. */
4354 if (XINT (read_kbd
) < 0)
4355 set_waiting_for_input (&timeout
);
4357 /* Wait till there is something to do. */
4359 if (! XINT (read_kbd
) && wait_for_cell
== 0)
4360 FD_ZERO (&waitchannels
);
4362 FD_SET (0, &waitchannels
);
4364 /* If a frame has been newly mapped and needs updating,
4365 reprocess its display stuff. */
4366 if (frame_garbaged
&& do_display
)
4368 clear_waiting_for_input ();
4369 redisplay_preserve_echo_area ();
4370 if (XINT (read_kbd
) < 0)
4371 set_waiting_for_input (&timeout
);
4374 if (XINT (read_kbd
) && detect_input_pending ())
4377 FD_ZERO (&waitchannels
);
4380 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
4385 /* Make C-g and alarm signals set flags again */
4386 clear_waiting_for_input ();
4388 /* If we woke up due to SIGWINCH, actually change size now. */
4389 do_pending_window_change ();
4391 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4392 /* We waited the full specified time, so return now. */
4397 /* If the system call was interrupted, then go around the
4399 if (xerrno
== EINTR
)
4400 FD_ZERO (&waitchannels
);
4402 error ("select error: %s", strerror (xerrno
));
4405 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
4406 /* System sometimes fails to deliver SIGIO. */
4407 kill (getpid (), SIGIO
);
4410 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
4411 kill (getpid (), SIGIO
);
4414 /* Check for keyboard input */
4416 if ((XINT (read_kbd
) != 0)
4417 && detect_input_pending_run_timers (do_display
))
4419 swallow_events (do_display
);
4420 if (detect_input_pending_run_timers (do_display
))
4424 /* If wait_for_cell. check for keyboard input
4425 but don't run any timers.
4426 ??? (It seems wrong to me to check for keyboard
4427 input at all when wait_for_cell, but the code
4428 has been this way since July 1994.
4429 Try changing this after version 19.31.) */
4431 && detect_input_pending ())
4433 swallow_events (do_display
);
4434 if (detect_input_pending ())
4438 /* Exit now if the cell we're waiting for became non-nil. */
4439 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
4449 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
4450 /* Don't confuse make-docfile by having two doc strings for this function.
4451 make-docfile does not pay attention to #if, for good reason! */
4454 register Lisp_Object name
;
4459 /* Kill all processes associated with `buffer'.
4460 If `buffer' is nil, kill all processes.
4461 Since we have no subprocesses, this does nothing. */
4463 kill_buffer_processes (buffer
)
4474 defsubr (&Sget_buffer_process
);
4478 #endif /* not subprocesses */