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
;
1186 XPROCESS (proc
)->decode_coding_system
= val
;
1188 if (NILP (val
= Vcoding_system_for_write
))
1190 if (EQ (coding_systems
, Qt
))
1192 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof args2
);
1193 args2
[0] = Qstart_process
;
1194 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1196 coding_systems
= Ffind_coding_system (nargs
+ 1, args2
);
1199 if (CONSP (coding_systems
))
1200 val
= XCONS (coding_systems
)->cdr
;
1202 XPROCESS (proc
)->encode_coding_system
= val
;
1205 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
1206 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
1208 create_process (proc
, new_argv
, current_dir
);
1210 return unbind_to (count
, proc
);
1213 /* This function is the unwind_protect form for Fstart_process. If
1214 PROC doesn't have its pid set, then we know someone has signaled
1215 an error and the process wasn't started successfully, so we should
1216 remove it from the process list. */
1218 start_process_unwind (proc
)
1221 if (!PROCESSP (proc
))
1224 /* Was PROC started successfully? */
1225 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1226 remove_process (proc
);
1233 create_process_1 (signo
)
1236 #if defined (USG) && !defined (POSIX_SIGNALS)
1237 /* USG systems forget handlers when they are used;
1238 must reestablish each time */
1239 signal (signo
, create_process_1
);
1243 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1246 /* Mimic blocking of signals on system V, which doesn't really have it. */
1248 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1249 int sigchld_deferred
;
1252 create_process_sigchld ()
1254 signal (SIGCHLD
, create_process_sigchld
);
1256 sigchld_deferred
= 1;
1262 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1263 create_process (process
, new_argv
, current_dir
)
1264 Lisp_Object process
;
1266 Lisp_Object current_dir
;
1268 int pid
, inchannel
, outchannel
;
1270 #ifdef POSIX_SIGNALS
1273 struct sigaction sigint_action
;
1274 struct sigaction sigquit_action
;
1276 struct sigaction sighup_action
;
1278 #else /* !POSIX_SIGNALS */
1280 SIGTYPE (*sigchld
)();
1282 #endif /* !POSIX_SIGNALS */
1283 /* Use volatile to protect variables from being clobbered by longjmp. */
1284 volatile int forkin
, forkout
;
1285 volatile int pty_flag
= 0;
1286 extern char **environ
;
1288 inchannel
= outchannel
= -1;
1291 if (!NILP (Vprocess_connection_type
))
1292 outchannel
= inchannel
= allocate_pty ();
1297 /* On USG systems it does not work to open the pty's tty here
1298 and then close and reopen it in the child. */
1300 /* Don't let this terminal become our controlling terminal
1301 (in case we don't have one). */
1302 forkout
= forkin
= open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1304 forkout
= forkin
= open (pty_name
, O_RDWR
, 0);
1307 report_file_error ("Opening pty", Qnil
);
1309 forkin
= forkout
= -1;
1310 #endif /* not USG */
1314 #endif /* HAVE_PTYS */
1317 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1318 report_file_error ("Opening socketpair", Qnil
);
1319 outchannel
= inchannel
= sv
[0];
1320 forkout
= forkin
= sv
[1];
1322 #else /* not SKTPAIR */
1331 #endif /* not SKTPAIR */
1334 /* Replaced by close_process_descs */
1335 set_exclusive_use (inchannel
);
1336 set_exclusive_use (outchannel
);
1339 /* Stride people say it's a mystery why this is needed
1340 as well as the O_NDELAY, but that it fails without this. */
1341 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1344 ioctl (inchannel
, FIONBIO
, &one
);
1349 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1350 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1353 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1354 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1358 /* Record this as an active process, with its channels.
1359 As a result, child_setup will close Emacs's side of the pipes. */
1360 chan_process
[inchannel
] = process
;
1361 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1362 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1363 /* Record the tty descriptor used in the subprocess. */
1365 XPROCESS (process
)->subtty
= Qnil
;
1367 XSETFASTINT (XPROCESS (process
)->subtty
, forkin
);
1368 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1369 XPROCESS (process
)->status
= Qrun
;
1370 if (!proc_decode_coding_system
[inchannel
])
1371 proc_decode_coding_system
[inchannel
]
1372 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
1373 setup_coding_system (XPROCESS (process
)->decode_coding_system
,
1374 proc_decode_coding_system
[inchannel
]);
1375 if (!proc_encode_coding_system
[outchannel
])
1376 proc_encode_coding_system
[outchannel
]
1377 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
1378 setup_coding_system (XPROCESS (process
)->encode_coding_system
,
1379 proc_encode_coding_system
[outchannel
]);
1381 /* Delay interrupts until we have a chance to store
1382 the new fork's pid in its process structure */
1383 #ifdef POSIX_SIGNALS
1384 sigemptyset (&blocked
);
1386 sigaddset (&blocked
, SIGCHLD
);
1389 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1390 this sets the parent's signal handlers as well as the child's.
1391 So delay all interrupts whose handlers the child might munge,
1392 and record the current handlers so they can be restored later. */
1393 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1394 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1396 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1398 #endif /* HAVE_VFORK */
1399 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1400 #else /* !POSIX_SIGNALS */
1404 #else /* not BSD4_1 */
1405 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1406 sigsetmask (sigmask (SIGCHLD
));
1407 #else /* ordinary USG */
1409 sigchld_deferred
= 0;
1410 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1412 #endif /* ordinary USG */
1413 #endif /* not BSD4_1 */
1414 #endif /* SIGCHLD */
1415 #endif /* !POSIX_SIGNALS */
1417 FD_SET (inchannel
, &input_wait_mask
);
1418 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1419 if (inchannel
> max_process_desc
)
1420 max_process_desc
= inchannel
;
1422 /* Until we store the proper pid, enable sigchld_handler
1423 to recognize an unknown pid as standing for this process.
1424 It is very important not to let this `marker' value stay
1425 in the table after this function has returned; if it does
1426 it might cause call-process to hang and subsequent asynchronous
1427 processes to get their return values scrambled. */
1428 XSETINT (XPROCESS (process
)->pid
, -1);
1433 /* child_setup must clobber environ on systems with true vfork.
1434 Protect it from permanent change. */
1435 char **save_environ
= environ
;
1440 #endif /* not WINDOWSNT */
1442 int xforkin
= forkin
;
1443 int xforkout
= forkout
;
1445 #if 0 /* This was probably a mistake--it duplicates code later on,
1446 but fails to handle all the cases. */
1447 /* Make sure SIGCHLD is not blocked in the child. */
1448 sigsetmask (SIGEMPTYMASK
);
1451 /* Make the pty be the controlling terminal of the process. */
1453 /* First, disconnect its current controlling terminal. */
1455 /* We tried doing setsid only if pty_flag, but it caused
1456 process_set_signal to fail on SGI when using a pipe. */
1458 /* Make the pty's terminal the controlling terminal. */
1462 /* We ignore the return value
1463 because faith@cs.unc.edu says that is necessary on Linux. */
1464 ioctl (xforkin
, TIOCSCTTY
, 0);
1467 #else /* not HAVE_SETSID */
1469 /* It's very important to call setpgrp here and no time
1470 afterwards. Otherwise, we lose our controlling tty which
1471 is set when we open the pty. */
1474 #endif /* not HAVE_SETSID */
1475 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1476 if (pty_flag
&& xforkin
>= 0)
1479 tcgetattr (xforkin
, &t
);
1481 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1482 write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1485 #if defined (NTTYDISC) && defined (TIOCSETD)
1486 if (pty_flag
&& xforkin
>= 0)
1488 /* Use new line discipline. */
1489 int ldisc
= NTTYDISC
;
1490 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1495 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1496 can do TIOCSPGRP only to the process's controlling tty. */
1499 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1500 I can't test it since I don't have 4.3. */
1501 int j
= open ("/dev/tty", O_RDWR
, 0);
1502 ioctl (j
, TIOCNOTTY
, 0);
1505 /* In order to get a controlling terminal on some versions
1506 of BSD, it is necessary to put the process in pgrp 0
1507 before it opens the terminal. */
1515 #endif /* TIOCNOTTY */
1517 #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY)
1518 /*** There is a suggestion that this ought to be a
1519 conditional on TIOCSPGRP,
1520 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1521 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1522 that system does seem to need this code, even though
1523 both HAVE_SETSID and TIOCSCTTY are defined. */
1524 /* Now close the pty (if we had it open) and reopen it.
1525 This makes the pty the controlling terminal of the subprocess. */
1528 #ifdef SET_CHILD_PTY_PGRP
1529 int pgrp
= getpid ();
1532 /* I wonder if close (open (pty_name, ...)) would work? */
1535 xforkout
= xforkin
= open (pty_name
, O_RDWR
, 0);
1539 write (1, "Couldn't open the pty terminal ", 31);
1540 write (1, pty_name
, strlen (pty_name
));
1545 #ifdef SET_CHILD_PTY_PGRP
1546 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1547 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1550 #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */
1552 #ifdef SETUP_SLAVE_PTY
1557 #endif /* SETUP_SLAVE_PTY */
1559 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1560 Now reenable it in the child, so it will die when we want it to. */
1562 signal (SIGHUP
, SIG_DFL
);
1564 #endif /* HAVE_PTYS */
1566 signal (SIGINT
, SIG_DFL
);
1567 signal (SIGQUIT
, SIG_DFL
);
1569 /* Stop blocking signals in the child. */
1570 #ifdef POSIX_SIGNALS
1571 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1572 #else /* !POSIX_SIGNALS */
1576 #else /* not BSD4_1 */
1577 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1578 sigsetmask (SIGEMPTYMASK
);
1579 #else /* ordinary USG */
1581 signal (SIGCHLD
, sigchld
);
1583 #endif /* ordinary USG */
1584 #endif /* not BSD4_1 */
1585 #endif /* SIGCHLD */
1586 #endif /* !POSIX_SIGNALS */
1589 child_setup_tty (xforkout
);
1591 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1592 new_argv
, 1, current_dir
);
1593 #else /* not WINDOWSNT */
1594 child_setup (xforkin
, xforkout
, xforkout
,
1595 new_argv
, 1, current_dir
);
1596 #endif /* not WINDOWSNT */
1598 environ
= save_environ
;
1603 /* This runs in the Emacs process. */
1608 if (forkin
!= forkout
&& forkout
>= 0)
1613 /* vfork succeeded. */
1614 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
1617 register_child (pid
, inchannel
);
1618 #endif /* WINDOWSNT */
1620 /* If the subfork execv fails, and it exits,
1621 this close hangs. I don't know why.
1622 So have an interrupt jar it loose. */
1624 signal (SIGALRM
, create_process_1
);
1626 XPROCESS (process
)->subtty
= Qnil
;
1631 if (forkin
!= forkout
&& forkout
>= 0)
1636 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1639 XPROCESS (process
)->tty_name
= Qnil
;
1642 /* Restore the signal state whether vfork succeeded or not.
1643 (We will signal an error, below, if it failed.) */
1644 #ifdef POSIX_SIGNALS
1646 /* Restore the parent's signal handlers. */
1647 sigaction (SIGINT
, &sigint_action
, 0);
1648 sigaction (SIGQUIT
, &sigquit_action
, 0);
1650 sigaction (SIGHUP
, &sighup_action
, 0);
1652 #endif /* HAVE_VFORK */
1653 /* Stop blocking signals in the parent. */
1654 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1655 #else /* !POSIX_SIGNALS */
1659 #else /* not BSD4_1 */
1660 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1661 sigsetmask (SIGEMPTYMASK
);
1662 #else /* ordinary USG */
1664 signal (SIGCHLD
, sigchld
);
1665 /* Now really handle any of these signals
1666 that came in during this function. */
1667 if (sigchld_deferred
)
1668 kill (getpid (), SIGCHLD
);
1670 #endif /* ordinary USG */
1671 #endif /* not BSD4_1 */
1672 #endif /* SIGCHLD */
1673 #endif /* !POSIX_SIGNALS */
1675 /* Now generate the error if vfork failed. */
1677 report_file_error ("Doing vfork", Qnil
);
1679 #endif /* not VMS */
1683 /* open a TCP network connection to a given HOST/SERVICE. Treated
1684 exactly like a normal process when reading and writing. Only
1685 differences are in status display and process deletion. A network
1686 connection has no PID; you cannot signal it. All you can do is
1687 deactivate and close it via delete-process */
1689 DEFUN ("open-network-stream", Fopen_network_stream
, Sopen_network_stream
,
1691 "Open a TCP connection for a service to a host.\n\
1692 Returns a subprocess-object to represent the connection.\n\
1693 Input and output work as for subprocesses; `delete-process' closes it.\n\
1694 Args are NAME BUFFER HOST SERVICE.\n\
1695 NAME is name for process. It is modified if necessary to make it unique.\n\
1696 BUFFER is the buffer (or buffer-name) to associate with the process.\n\
1697 Process output goes at end of that buffer, unless you specify\n\
1698 an output stream or filter function to handle the output.\n\
1699 BUFFER may be also nil, meaning that this process is not associated\n\
1701 Third arg is name of the host to connect to, or its IP address.\n\
1702 Fourth arg SERVICE is name of the service desired, or an integer\n\
1703 specifying a port number to connect to.")
1704 (name
, buffer
, host
, service
)
1705 Lisp_Object name
, buffer
, host
, service
;
1709 struct sockaddr_in address
;
1710 struct servent
*svc_info
;
1711 struct hostent
*host_info_ptr
, host_info
;
1712 char *(addr_list
[2]);
1713 IN_ADDR numeric_addr
;
1717 struct hostent host_info_fixed
;
1718 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1720 int count
= specpdl_ptr
- specpdl
;
1723 /* Ensure socket support is loaded if available. */
1724 init_winsock (TRUE
);
1727 GCPRO4 (name
, buffer
, host
, service
);
1728 CHECK_STRING (name
, 0);
1729 CHECK_STRING (host
, 0);
1730 if (INTEGERP (service
))
1731 port
= htons ((unsigned short) XINT (service
));
1734 CHECK_STRING (service
, 0);
1735 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
1737 error ("Unknown service \"%s\"", XSTRING (service
)->data
);
1738 port
= svc_info
->s_port
;
1741 /* Slow down polling to every ten seconds.
1742 Some kernels have a bug which causes retrying connect to fail
1743 after a connect. Polling can interfere with gethostbyname too. */
1744 #ifdef POLL_FOR_INPUT
1745 bind_polling_period (10);
1756 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
1759 if (! (host_info_ptr
== 0 && h_errno
== TRY_AGAIN
))
1762 Fsleep_for (make_number (1), Qnil
);
1764 if (host_info_ptr
== 0)
1765 /* Attempt to interpret host as numeric inet address */
1767 numeric_addr
= inet_addr ((char *) XSTRING (host
)->data
);
1768 if (NUMERIC_ADDR_ERROR
)
1769 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
1771 host_info_ptr
= &host_info
;
1772 host_info
.h_name
= 0;
1773 host_info
.h_aliases
= 0;
1774 host_info
.h_addrtype
= AF_INET
;
1776 /* Older machines have only one address slot called h_addr.
1777 Newer machines have h_addr_list, but #define h_addr to
1778 be its first element. */
1779 host_info
.h_addr_list
= &(addr_list
[0]);
1781 host_info
.h_addr
= (char*)(&numeric_addr
);
1783 /* numeric_addr isn't null-terminated; it has fixed length. */
1784 host_info
.h_length
= sizeof (numeric_addr
);
1787 bzero (&address
, sizeof address
);
1788 bcopy (host_info_ptr
->h_addr
, (char *) &address
.sin_addr
,
1789 host_info_ptr
->h_length
);
1790 address
.sin_family
= host_info_ptr
->h_addrtype
;
1791 address
.sin_port
= port
;
1793 s
= socket (host_info_ptr
->h_addrtype
, SOCK_STREAM
, 0);
1795 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1797 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
1798 when connect is interrupted. So let's not let it get interrupted.
1799 Note we do not turn off polling, because polling is only used
1800 when not interrupt_input, and thus not normally used on the systems
1801 which have this bug. On systems which use polling, there's no way
1802 to quit if polling is turned off. */
1803 if (interrupt_input
)
1811 if (connect (s
, (struct sockaddr
*) &address
, sizeof address
) == -1
1812 && errno
!= EISCONN
)
1820 if (errno
== EADDRINUSE
&& retry
< 20)
1822 /* A delay here is needed on some FreeBSD systems,
1823 and it is harmless, since this retrying takes time anyway
1824 and should be infrequent. */
1825 Fsleep_for (make_number (1), Qnil
);
1832 if (interrupt_input
)
1836 report_file_error ("connection failed",
1837 Fcons (host
, Fcons (name
, Qnil
)));
1842 #ifdef POLL_FOR_INPUT
1843 unbind_to (count
, Qnil
);
1846 if (interrupt_input
)
1850 s
= connect_server (0);
1852 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1853 send_command (s
, C_PORT
, 0, "%s:%d", XSTRING (host
)->data
, ntohs (port
));
1854 send_command (s
, C_DUMB
, 1, 0);
1860 report_file_error ("error duplicating socket", Fcons (name
, Qnil
));
1863 buffer
= Fget_buffer_create (buffer
);
1864 proc
= make_process (name
);
1866 chan_process
[inch
] = proc
;
1869 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
1872 fcntl (inch
, F_SETFL
, O_NDELAY
);
1876 XPROCESS (proc
)->childp
= Fcons (host
, Fcons (service
, Qnil
));
1877 XPROCESS (proc
)->command_channel_p
= Qnil
;
1878 XPROCESS (proc
)->buffer
= buffer
;
1879 XPROCESS (proc
)->sentinel
= Qnil
;
1880 XPROCESS (proc
)->filter
= Qnil
;
1881 XPROCESS (proc
)->command
= Qnil
;
1882 XPROCESS (proc
)->pid
= Qnil
;
1883 XSETINT (XPROCESS (proc
)->infd
, inch
);
1884 XSETINT (XPROCESS (proc
)->outfd
, outch
);
1885 XPROCESS (proc
)->status
= Qrun
;
1886 FD_SET (inch
, &input_wait_mask
);
1887 FD_SET (inch
, &non_keyboard_wait_mask
);
1888 if (inch
> max_process_desc
)
1889 max_process_desc
= inch
;
1891 if (!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
)
1892 || NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
))
1894 XPROCESS (proc
)->decode_coding_system
= Qnil
;
1895 XPROCESS (proc
)->encode_coding_system
= Qnil
;
1899 /* Setup coding systems for communicating with the network stream. */
1900 struct gcpro gcpro1
;
1901 /* Qt denotes that we have not yet called Ffind_coding_system. */
1902 Lisp_Object coding_systems
= Qt
;
1903 Lisp_Object args
[5], val
;
1905 if (NILP (val
= Vcoding_system_for_read
))
1907 args
[0] = Qopen_network_stream
, args
[1] = name
,
1908 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
1910 coding_systems
= Ffind_coding_system (5, args
);
1912 val
= (CONSP (coding_systems
) ? XCONS (coding_systems
)->car
: Qnil
);
1914 XPROCESS (proc
)->decode_coding_system
= val
;
1916 if (NILP (val
= Vcoding_system_for_write
))
1918 if (EQ (coding_systems
, Qt
))
1920 args
[0] = Qopen_network_stream
, args
[1] = name
,
1921 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
1923 coding_systems
= Ffind_coding_system (5, args
);
1926 val
= (CONSP (coding_systems
) ? XCONS (coding_systems
)->cdr
: Qnil
);
1928 XPROCESS (proc
)->encode_coding_system
= val
;
1931 if (!proc_decode_coding_system
[inch
])
1932 proc_decode_coding_system
[inch
]
1933 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
1934 setup_coding_system (XPROCESS (proc
)->decode_coding_system
,
1935 proc_decode_coding_system
[inch
]);
1936 if (!proc_encode_coding_system
[outch
])
1937 proc_encode_coding_system
[outch
]
1938 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
1939 setup_coding_system (XPROCESS (proc
)->encode_coding_system
,
1940 proc_encode_coding_system
[outch
]);
1942 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
1943 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
1948 #endif /* HAVE_SOCKETS */
1950 deactivate_process (proc
)
1953 register int inchannel
, outchannel
;
1954 register struct Lisp_Process
*p
= XPROCESS (proc
);
1956 inchannel
= XINT (p
->infd
);
1957 outchannel
= XINT (p
->outfd
);
1961 /* Beware SIGCHLD hereabouts. */
1962 flush_pending_output (inchannel
);
1965 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
1966 sys$
dassgn (outchannel
);
1967 vs
= get_vms_process_pointer (p
->pid
);
1969 give_back_vms_process_stuff (vs
);
1973 if (outchannel
>= 0 && outchannel
!= inchannel
)
1977 XSETINT (p
->infd
, -1);
1978 XSETINT (p
->outfd
, -1);
1979 chan_process
[inchannel
] = Qnil
;
1980 FD_CLR (inchannel
, &input_wait_mask
);
1981 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
1982 if (inchannel
== max_process_desc
)
1985 /* We just closed the highest-numbered process input descriptor,
1986 so recompute the highest-numbered one now. */
1987 max_process_desc
= 0;
1988 for (i
= 0; i
< MAXDESC
; i
++)
1989 if (!NILP (chan_process
[i
]))
1990 max_process_desc
= i
;
1995 /* Close all descriptors currently in use for communication
1996 with subprocess. This is used in a newly-forked subprocess
1997 to get rid of irrelevant descriptors. */
1999 close_process_descs ()
2003 for (i
= 0; i
< MAXDESC
; i
++)
2005 Lisp_Object process
;
2006 process
= chan_process
[i
];
2007 if (!NILP (process
))
2009 int in
= XINT (XPROCESS (process
)->infd
);
2010 int out
= XINT (XPROCESS (process
)->outfd
);
2013 if (out
>= 0 && in
!= out
)
2020 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
2022 "Allow any pending output from subprocesses to be read by Emacs.\n\
2023 It is read into the process' buffers or given to their filter functions.\n\
2024 Non-nil arg PROCESS means do not return until some output has been received\n\
2026 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
2027 seconds and microseconds to wait; return after that much time whether\n\
2028 or not there is input.\n\
2029 Return non-nil iff we received any output before the timeout expired.")
2030 (process
, timeout
, timeout_msecs
)
2031 register Lisp_Object process
, timeout
, timeout_msecs
;
2036 if (! NILP (timeout_msecs
))
2038 CHECK_NUMBER (timeout_msecs
, 2);
2039 useconds
= XINT (timeout_msecs
);
2040 if (!INTEGERP (timeout
))
2041 XSETINT (timeout
, 0);
2044 int carry
= useconds
/ 1000000;
2046 XSETINT (timeout
, XINT (timeout
) + carry
);
2047 useconds
-= carry
* 1000000;
2049 /* I think this clause is necessary because C doesn't
2050 guarantee a particular rounding direction for negative
2054 XSETINT (timeout
, XINT (timeout
) - 1);
2055 useconds
+= 1000000;
2062 if (! NILP (timeout
))
2064 CHECK_NUMBER (timeout
, 1);
2065 seconds
= XINT (timeout
);
2066 if (seconds
< 0 || (seconds
== 0 && useconds
== 0))
2078 XSETFASTINT (process
, 0);
2081 (wait_reading_process_input (seconds
, useconds
, process
, 0)
2085 /* This variable is different from waiting_for_input in keyboard.c.
2086 It is used to communicate to a lisp process-filter/sentinel (via the
2087 function Fwaiting_for_user_input_p below) whether emacs was waiting
2088 for user-input when that process-filter was called.
2089 waiting_for_input cannot be used as that is by definition 0 when
2090 lisp code is being evalled.
2091 This is also used in record_asynch_buffer_change.
2092 For that purpose, this must be 0
2093 when not inside wait_reading_process_input. */
2094 static int waiting_for_user_input_p
;
2096 /* This is here so breakpoints can be put on it. */
2098 wait_reading_process_input_1 ()
2102 /* Read and dispose of subprocess output while waiting for timeout to
2103 elapse and/or keyboard input to be available.
2106 timeout in seconds, or
2107 zero for no limit, or
2108 -1 means gobble data immediately available but don't wait for any.
2111 an additional duration to wait, measured in microseconds.
2112 If this is nonzero and time_limit is 0, then the timeout
2113 consists of MICROSECS only.
2115 READ_KBD is a lisp value:
2116 0 to ignore keyboard input, or
2117 1 to return when input is available, or
2118 -1 meaning caller will actually read the input, so don't throw to
2119 the quit handler, or
2120 a cons cell, meaning wait until its car is non-nil
2121 (and gobble terminal input into the buffer if any arrives), or
2122 a process object, meaning wait until something arrives from that
2123 process. The return value is true iff we read some input from
2126 DO_DISPLAY != 0 means redisplay should be done to show subprocess
2127 output that arrives.
2129 If READ_KBD is a pointer to a struct Lisp_Process, then the
2130 function returns true iff we received input from that process
2131 before the timeout elapsed.
2132 Otherwise, return true iff we received input from any process. */
2134 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
2135 int time_limit
, microsecs
;
2136 Lisp_Object read_kbd
;
2139 register int channel
, nfds
, m
;
2140 static SELECT_TYPE Available
;
2143 EMACS_TIME timeout
, end_time
, garbage
;
2145 int wait_channel
= -1;
2146 struct Lisp_Process
*wait_proc
= 0;
2147 int got_some_input
= 0;
2148 Lisp_Object
*wait_for_cell
= 0;
2150 FD_ZERO (&Available
);
2152 /* If read_kbd is a process to watch, set wait_proc and wait_channel
2154 if (PROCESSP (read_kbd
))
2156 wait_proc
= XPROCESS (read_kbd
);
2157 wait_channel
= XINT (wait_proc
->infd
);
2158 XSETFASTINT (read_kbd
, 0);
2161 /* If waiting for non-nil in a cell, record where. */
2162 if (CONSP (read_kbd
))
2164 wait_for_cell
= &XCONS (read_kbd
)->car
;
2165 XSETFASTINT (read_kbd
, 0);
2168 waiting_for_user_input_p
= XINT (read_kbd
);
2170 /* Since we may need to wait several times,
2171 compute the absolute time to return at. */
2172 if (time_limit
|| microsecs
)
2174 EMACS_GET_TIME (end_time
);
2175 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
2176 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
2179 /* AlainF 5-Jul-1996
2180 HP-UX 10.10 seem to have problems with signals coming in
2181 Causes "poll: interrupted system call" messages when Emacs is run
2183 Turn off periodic alarms (in case they are in use) */
2189 int timeout_reduced_for_timers
= 0;
2191 /* If calling from keyboard input, do not quit
2192 since we want to return C-g as an input character.
2193 Otherwise, do pending quit if requested. */
2194 if (XINT (read_kbd
) >= 0)
2197 /* Exit now if the cell we're waiting for became non-nil. */
2198 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2201 /* Compute time from now till when time limit is up */
2202 /* Exit if already run out */
2203 if (time_limit
== -1)
2205 /* -1 specified for timeout means
2206 gobble output available now
2207 but don't wait at all. */
2209 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2211 else if (time_limit
|| microsecs
)
2213 EMACS_GET_TIME (timeout
);
2214 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
2215 if (EMACS_TIME_NEG_P (timeout
))
2220 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
2223 /* Normally we run timers here.
2224 But not if wait_for_cell; in those cases,
2225 the wait is supposed to be short,
2226 and those callers cannot handle running arbitrary Lisp code here. */
2227 if (! wait_for_cell
)
2229 EMACS_TIME timer_delay
;
2233 old_timers_run
= timers_run
;
2234 timer_delay
= timer_check (1);
2235 if (timers_run
!= old_timers_run
&& do_display
)
2237 redisplay_preserve_echo_area ();
2238 /* We must retry, since a timer may have requeued itself
2239 and that could alter the time_delay. */
2243 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
2245 EMACS_TIME difference
;
2246 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
2247 if (EMACS_TIME_NEG_P (difference
))
2249 timeout
= timer_delay
;
2250 timeout_reduced_for_timers
= 1;
2253 /* If time_limit is -1, we are not going to wait at all. */
2254 else if (time_limit
!= -1)
2256 /* This is so a breakpoint can be put here. */
2257 wait_reading_process_input_1 ();
2261 /* Cause C-g and alarm signals to take immediate action,
2262 and cause input available signals to zero out timeout.
2264 It is important that we do this before checking for process
2265 activity. If we get a SIGCHLD after the explicit checks for
2266 process activity, timeout is the only way we will know. */
2267 if (XINT (read_kbd
) < 0)
2268 set_waiting_for_input (&timeout
);
2270 /* If status of something has changed, and no input is
2271 available, notify the user of the change right away. After
2272 this explicit check, we'll let the SIGCHLD handler zap
2273 timeout to get our attention. */
2274 if (update_tick
!= process_tick
&& do_display
)
2276 Atemp
= input_wait_mask
;
2277 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2278 if ((select (MAXDESC
, &Atemp
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2282 /* It's okay for us to do this and then continue with
2283 the loop, since timeout has already been zeroed out. */
2284 clear_waiting_for_input ();
2289 /* Don't wait for output from a non-running process. */
2290 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
2291 update_status (wait_proc
);
2293 && ! EQ (wait_proc
->status
, Qrun
))
2295 clear_waiting_for_input ();
2299 /* Wait till there is something to do */
2302 Available
= non_process_wait_mask
;
2303 else if (! XINT (read_kbd
))
2304 Available
= non_keyboard_wait_mask
;
2306 Available
= input_wait_mask
;
2308 /* If frame size has changed or the window is newly mapped,
2309 redisplay now, before we start to wait. There is a race
2310 condition here; if a SIGIO arrives between now and the select
2311 and indicates that a frame is trashed, the select may block
2312 displaying a trashed screen. */
2313 if (frame_garbaged
&& do_display
)
2315 clear_waiting_for_input ();
2316 redisplay_preserve_echo_area ();
2317 if (XINT (read_kbd
) < 0)
2318 set_waiting_for_input (&timeout
);
2321 if (XINT (read_kbd
) && detect_input_pending ())
2324 FD_ZERO (&Available
);
2327 nfds
= select (MAXDESC
, &Available
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2332 /* Make C-g and alarm signals set flags again */
2333 clear_waiting_for_input ();
2335 /* If we woke up due to SIGWINCH, actually change size now. */
2336 do_pending_window_change ();
2338 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
2339 /* We wanted the full specified time, so return now. */
2343 if (xerrno
== EINTR
)
2344 FD_ZERO (&Available
);
2346 /* Ultrix select seems to return ENOMEM when it is
2347 interrupted. Treat it just like EINTR. Bleah. Note
2348 that we want to test for the "ultrix" CPP symbol, not
2349 "__ultrix__"; the latter is only defined under GCC, but
2350 not by DEC's bundled CC. -JimB */
2351 else if (xerrno
== ENOMEM
)
2352 FD_ZERO (&Available
);
2355 /* This happens for no known reason on ALLIANT.
2356 I am guessing that this is the right response. -- RMS. */
2357 else if (xerrno
== EFAULT
)
2358 FD_ZERO (&Available
);
2360 else if (xerrno
== EBADF
)
2363 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
2364 the child's closure of the pts gives the parent a SIGHUP, and
2365 the ptc file descriptor is automatically closed,
2366 yielding EBADF here or at select() call above.
2367 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
2368 in m/ibmrt-aix.h), and here we just ignore the select error.
2369 Cleanup occurs c/o status_notify after SIGCLD. */
2370 FD_ZERO (&Available
); /* Cannot depend on values returned */
2376 error ("select error: %s", strerror (xerrno
));
2378 #if defined(sun) && !defined(USG5_4)
2379 else if (nfds
> 0 && keyboard_bit_set (&Available
)
2381 /* System sometimes fails to deliver SIGIO.
2383 David J. Mackenzie says that Emacs doesn't compile under
2384 Solaris if this code is enabled, thus the USG5_4 in the CPP
2385 conditional. "I haven't noticed any ill effects so far.
2386 If you find a Solaris expert somewhere, they might know
2388 kill (getpid (), SIGIO
);
2391 /* Check for keyboard input */
2392 /* If there is any, return immediately
2393 to give it higher priority than subprocesses */
2395 if ((XINT (read_kbd
) != 0)
2396 && detect_input_pending_run_timers (do_display
))
2398 swallow_events (do_display
);
2399 if (detect_input_pending_run_timers (do_display
))
2403 /* If wait_for_cell. check for keyboard input
2404 but don't run any timers.
2405 ??? (It seems wrong to me to check for keyboard
2406 input at all when wait_for_cell, but the code
2407 has been this way since July 1994.
2408 Try changing this after version 19.31.) */
2410 && detect_input_pending ())
2412 swallow_events (do_display
);
2413 if (detect_input_pending ())
2417 /* Exit now if the cell we're waiting for became non-nil. */
2418 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2422 /* If we think we have keyboard input waiting, but didn't get SIGIO
2423 go read it. This can happen with X on BSD after logging out.
2424 In that case, there really is no input and no SIGIO,
2425 but select says there is input. */
2427 if (XINT (read_kbd
) && interrupt_input
2428 && (keyboard_bit_set (&Available
)))
2429 kill (getpid (), SIGIO
);
2433 got_some_input
|= nfds
> 0;
2435 /* If checking input just got us a size-change event from X,
2436 obey it now if we should. */
2437 if (XINT (read_kbd
) || wait_for_cell
)
2438 do_pending_window_change ();
2440 /* Check for data from a process. */
2441 /* Really FIRST_PROC_DESC should be 0 on Unix,
2442 but this is safer in the short run. */
2443 for (channel
= 0; channel
<= max_process_desc
; channel
++)
2445 if (FD_ISSET (channel
, &Available
)
2446 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
2450 /* If waiting for this channel, arrange to return as
2451 soon as no more input to be processed. No more
2453 if (wait_channel
== channel
)
2459 proc
= chan_process
[channel
];
2463 /* Read data from the process, starting with our
2464 buffered-ahead character if we have one. */
2466 nread
= read_process_output (proc
, channel
);
2469 /* Since read_process_output can run a filter,
2470 which can call accept-process-output,
2471 don't try to read from any other processes
2472 before doing the select again. */
2473 FD_ZERO (&Available
);
2476 redisplay_preserve_echo_area ();
2479 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2482 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
2483 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
2485 else if (nread
== -1 && errno
== EAGAIN
)
2489 else if (nread
== -1 && errno
== EAGAIN
)
2491 /* Note that we cannot distinguish between no input
2492 available now and a closed pipe.
2493 With luck, a closed pipe will be accompanied by
2494 subprocess termination and SIGCHLD. */
2495 else if (nread
== 0 && !NETCONN_P (proc
))
2497 #endif /* O_NDELAY */
2498 #endif /* O_NONBLOCK */
2500 /* On some OSs with ptys, when the process on one end of
2501 a pty exits, the other end gets an error reading with
2502 errno = EIO instead of getting an EOF (0 bytes read).
2503 Therefore, if we get an error reading and errno =
2504 EIO, just continue, because the child process has
2505 exited and should clean itself up soon (e.g. when we
2507 else if (nread
== -1 && errno
== EIO
)
2509 #endif /* HAVE_PTYS */
2510 /* If we can detect process termination, don't consider the process
2511 gone just because its pipe is closed. */
2513 else if (nread
== 0 && !NETCONN_P (proc
))
2518 /* Preserve status of processes already terminated. */
2519 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2520 deactivate_process (proc
);
2521 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2522 update_status (XPROCESS (proc
));
2523 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2524 XPROCESS (proc
)->status
2525 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2528 } /* end for each file descriptor */
2529 } /* end while exit conditions not met */
2531 waiting_for_user_input_p
= 0;
2533 /* If calling from keyboard input, do not quit
2534 since we want to return C-g as an input character.
2535 Otherwise, do pending quit if requested. */
2536 if (XINT (read_kbd
) >= 0)
2538 /* Prevent input_pending from remaining set if we quit. */
2539 clear_input_pending ();
2543 /* AlainF 5-Jul-1996
2544 HP-UX 10.10 seems to have problems with signals coming in
2545 Causes "poll: interrupted system call" messages when Emacs is run
2547 Turn periodic alarms back on */
2551 return got_some_input
;
2554 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
2557 read_process_output_call (fun_and_args
)
2558 Lisp_Object fun_and_args
;
2560 return apply1 (XCONS (fun_and_args
)->car
, XCONS (fun_and_args
)->cdr
);
2564 read_process_output_error_handler (error
)
2567 cmd_error_internal (error
, "error in process filter: ");
2569 update_echo_area ();
2570 Fsleep_for (make_number (2), Qnil
);
2574 #define READ_CHILD_OUTPUT read_child_output
2576 #define READ_CHILD_OUTPUT read
2579 /* Read pending output from the process channel,
2580 starting with our buffered-ahead character if we have one.
2581 Yield number of decoded characters read.
2583 This function reads at most 1024 characters.
2584 If you want to read all available subprocess output,
2585 you must call it repeatedly until it returns zero.
2587 The characters read are decoded according to PROC's coding-system
2590 read_process_output (proc
, channel
)
2592 register int channel
;
2594 register int nchars
;
2597 int chars_allocated
= 0; /* If 1, `chars' should be freed later. */
2601 register Lisp_Object outstream
;
2602 register struct buffer
*old
= current_buffer
;
2603 register struct Lisp_Process
*p
= XPROCESS (proc
);
2604 register int opoint
;
2605 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
2606 int chars_in_decoding_buf
= 0; /* If 1, `chars' points
2607 XSTRING (p->decoding_buf)->data. */
2610 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2612 vs
= get_vms_process_pointer (p
->pid
);
2616 return(0); /* Really weird if it does this */
2617 if (!(vs
->iosb
[0] & 1))
2618 return -1; /* I/O error */
2621 error ("Could not get VMS process pointer");
2622 chars
= vs
->inputBuffer
;
2623 nchars
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2626 start_vms_process_read (vs
); /* Crank up the next read on the process */
2627 return 1; /* Nothing worth printing, say we got 1 */
2629 if (coding
->carryover_size
)
2631 /* The data carried over in the previous decoding should be
2632 prepended to the new data read to decode all together. */
2633 char *buf
= (char *) xmalloc (nchars
+ coding
->carryover_size
);
2635 bcopy (coding
->carryover
, buf
, coding
->carryover_size
);
2636 bcopy (chars
, buf
+ coding
->carryover_size
, nchars
);
2638 chars_allocated
= 1;
2642 if (coding
->carryover_size
)
2643 /* The data carried over in the previous decoding should be
2644 prepended to the new data read to decode all together. */
2645 bcopy (coding
->carryover
, buf
, coding
->carryover_size
);
2647 if (proc_buffered_char
[channel
] < 0)
2648 nchars
= READ_CHILD_OUTPUT (channel
, buf
+ coding
->carryover_size
,
2649 (sizeof buf
) - coding
->carryover_size
);
2652 buf
[coding
->carryover_size
] = proc_buffered_char
[channel
];
2653 proc_buffered_char
[channel
] = -1;
2654 nchars
= READ_CHILD_OUTPUT (channel
, buf
+ coding
->carryover_size
+ 1,
2655 (sizeof buf
) - coding
->carryover_size
- 1);
2659 nchars
= nchars
+ 1;
2662 #endif /* not VMS */
2664 /* At this point, NCHARS holds number of characters just received
2665 (including the one in proc_buffered_char[channel]). */
2666 if (nchars
<= 0) return nchars
;
2668 /* Now set NCHARS how many bytes we must decode. */
2669 nchars
+= coding
->carryover_size
;
2671 if (CODING_REQUIRE_CONVERSION (coding
))
2673 int require
= decoding_buffer_size (coding
, nchars
);
2674 int consumed
, produced
;
2676 if (XSTRING (p
->decoding_buf
)->size
< require
)
2677 p
->decoding_buf
= make_uninit_string (require
);
2678 produced
= decode_coding (coding
, chars
, XSTRING (p
->decoding_buf
)->data
,
2679 nchars
, XSTRING (p
->decoding_buf
)->size
,
2682 /* New coding-system might be found by `decode_coding'. */
2683 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
2685 p
->decode_coding_system
= coding
->symbol
;
2686 setup_coding_system (coding
->symbol
,
2687 proc_decode_coding_system
[channel
]);
2688 /* If coding-system for encoding is not yet decided, we set it
2689 as the same as coding-system for decoding. */
2690 if (NILP (p
->encode_coding_system
))
2692 p
->encode_coding_system
= coding
->symbol
;
2693 setup_coding_system (coding
->symbol
,
2694 proc_encode_coding_system
[channel
]);
2698 /* Now we don't need the contents of `chars'. */
2699 if (chars_allocated
)
2704 chars
= XSTRING (p
->decoding_buf
)->data
;
2706 chars_in_decoding_buf
= 1;
2709 else if (chars_allocated
)
2711 /* Although we don't have to decode the received data, we must
2712 move it to an area which we don't have to free. */
2713 if (! STRINGP (p
->decoding_buf
)
2714 || XSTRING (p
->decoding_buf
)->size
< nchars
)
2715 p
->decoding_buf
= make_uninit_string (nchars
);
2716 bcopy (chars
, XSTRING (p
->decoding_buf
)->data
, nchars
);
2718 chars
= XSTRING (p
->decoding_buf
)->data
;
2719 chars_in_decoding_buf
= 1;
2723 outstream
= p
->filter
;
2724 if (!NILP (outstream
))
2726 /* We inhibit quit here instead of just catching it so that
2727 hitting ^G when a filter happens to be running won't screw
2729 int count
= specpdl_ptr
- specpdl
;
2730 Lisp_Object odeactivate
;
2731 Lisp_Object obuffer
, okeymap
;
2732 int outer_running_asynch_code
= running_asynch_code
;
2734 /* No need to gcpro these, because all we do with them later
2735 is test them for EQness, and none of them should be a string. */
2736 odeactivate
= Vdeactivate_mark
;
2737 XSETBUFFER (obuffer
, current_buffer
);
2738 okeymap
= current_buffer
->keymap
;
2740 specbind (Qinhibit_quit
, Qt
);
2741 specbind (Qlast_nonmenu_event
, Qt
);
2743 /* In case we get recursively called,
2744 and we already saved the match data nonrecursively,
2745 save the same match data in safely recursive fashion. */
2746 if (outer_running_asynch_code
)
2749 /* Don't clobber the CURRENT match data, either! */
2750 tem
= Fmatch_data (Qnil
, Qnil
);
2751 restore_match_data ();
2752 record_unwind_protect (Fstore_match_data
, Fmatch_data (Qnil
, Qnil
));
2753 Fstore_match_data (tem
);
2756 /* For speed, if a search happens within this code,
2757 save the match data in a special nonrecursive fashion. */
2758 running_asynch_code
= 1;
2760 /* Read and dispose of the process output. */
2761 internal_condition_case_1 (read_process_output_call
,
2764 Fcons (make_string (chars
,
2767 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
2768 read_process_output_error_handler
);
2770 /* If we saved the match data nonrecursively, restore it now. */
2771 restore_match_data ();
2772 running_asynch_code
= outer_running_asynch_code
;
2774 /* Handling the process output should not deactivate the mark. */
2775 Vdeactivate_mark
= odeactivate
;
2777 #if 0 /* Call record_asynch_buffer_change unconditionally,
2778 because we might have changed minor modes or other things
2779 that affect key bindings. */
2780 if (! EQ (Fcurrent_buffer (), obuffer
)
2781 || ! EQ (current_buffer
->keymap
, okeymap
))
2783 /* But do it only if the caller is actually going to read events.
2784 Otherwise there's no need to make him wake up, and it could
2785 cause trouble (for example it would make Fsit_for return). */
2786 if (waiting_for_user_input_p
== -1)
2787 record_asynch_buffer_change ();
2790 start_vms_process_read (vs
);
2792 unbind_to (count
, Qnil
);
2796 /* If no filter, write into buffer if it isn't dead. */
2797 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2799 Lisp_Object old_read_only
;
2800 Lisp_Object old_begv
, old_zv
;
2801 Lisp_Object odeactivate
;
2803 odeactivate
= Vdeactivate_mark
;
2805 Fset_buffer (p
->buffer
);
2807 old_read_only
= current_buffer
->read_only
;
2808 XSETFASTINT (old_begv
, BEGV
);
2809 XSETFASTINT (old_zv
, ZV
);
2811 current_buffer
->read_only
= Qnil
;
2813 /* Insert new output into buffer
2814 at the current end-of-output marker,
2815 thus preserving logical ordering of input and output. */
2816 if (XMARKER (p
->mark
)->buffer
)
2817 SET_PT (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
));
2821 /* If the output marker is outside of the visible region, save
2822 the restriction and widen. */
2823 if (! (BEGV
<= PT
&& PT
<= ZV
))
2826 /* Make sure opoint floats ahead of any new text, just as point
2831 /* Insert after old_begv, but before old_zv. */
2832 if (PT
< XFASTINT (old_begv
))
2833 XSETFASTINT (old_begv
, XFASTINT (old_begv
) + nchars
);
2834 if (PT
<= XFASTINT (old_zv
))
2835 XSETFASTINT (old_zv
, XFASTINT (old_zv
) + nchars
);
2837 /* Insert before markers in case we are inserting where
2838 the buffer's mark is, and the user's next command is Meta-y. */
2839 if (chars_in_decoding_buf
)
2840 insert_from_string_before_markers (p
->decoding_buf
, 0, nchars
, 0);
2842 insert_before_markers (chars
, nchars
);
2843 Fset_marker (p
->mark
, make_number (PT
), p
->buffer
);
2845 update_mode_lines
++;
2847 /* If the restriction isn't what it should be, set it. */
2848 if (XFASTINT (old_begv
) != BEGV
|| XFASTINT (old_zv
) != ZV
)
2849 Fnarrow_to_region (old_begv
, old_zv
);
2851 /* Handling the process output should not deactivate the mark. */
2852 Vdeactivate_mark
= odeactivate
;
2854 current_buffer
->read_only
= old_read_only
;
2856 set_buffer_internal (old
);
2859 start_vms_process_read (vs
);
2864 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
2866 "Returns non-nil if emacs is waiting for input from the user.\n\
2867 This is intended for use by asynchronous process output filters and sentinels.")
2870 return (waiting_for_user_input_p
? Qt
: Qnil
);
2873 /* Sending data to subprocess */
2875 jmp_buf send_process_frame
;
2878 send_process_trap ()
2884 longjmp (send_process_frame
, 1);
2887 /* Send some data to process PROC.
2888 BUF is the beginning of the data; LEN is the number of characters.
2889 OBJECT is the Lisp object that the data comes from.
2891 The data is encoded by PROC's coding-system for encoding before it
2892 is sent. But if the data ends at the middle of multi-byte
2893 representation, that incomplete sequence of bytes are sent without
2894 being encoded. Should we store them in a buffer to prepend them to
2895 the data send later? */
2897 send_process (proc
, buf
, len
, object
)
2898 volatile Lisp_Object proc
;
2903 /* Use volatile to protect variables from being clobbered by longjmp. */
2905 volatile unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
2906 struct coding_system
*coding
;
2907 struct gcpro gcpro1
;
2912 struct Lisp_Process
*p
= XPROCESS (proc
);
2913 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2916 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2917 update_status (XPROCESS (proc
));
2918 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2919 error ("Process %s not running", procname
);
2920 if (XINT (XPROCESS (proc
)->outfd
) < 0)
2921 error ("Output file descriptor of %s is closed", procname
);
2923 coding
= proc_encode_coding_system
[XINT (XPROCESS (proc
)->outfd
)];
2924 if (CODING_REQUIRE_CONVERSION (coding
))
2926 int require
= encoding_buffer_size (coding
, len
);
2928 char *temp_buf
= NULL
;
2930 /* Remember the offset of data because a string or a buffer may
2931 be relocated. Setting OFFSET to -1 means we don't have to
2933 offset
= (BUFFERP (object
)
2934 ? BUF_PTR_CHAR_POS (XBUFFER (object
), (unsigned char *) buf
)
2936 ? offset
= buf
- (char *) XSTRING (object
)->data
2939 if (coding
->carryover_size
> 0)
2941 temp_buf
= (char *) xmalloc (len
+ coding
->carryover_size
);
2945 if (BUFFERP (object
))
2946 buf
= (char *) BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
2947 else if (STRINGP (object
))
2948 buf
= offset
+ (char *) XSTRING (object
)->data
;
2949 /* Now we don't have to care relocation. */
2952 bcopy (coding
->carryover
, temp_buf
, coding
->carryover_size
);
2953 bcopy (buf
, temp_buf
+ coding
->carryover_size
, len
);
2957 if (XSTRING (XPROCESS (proc
)->encoding_buf
)->size
< require
)
2959 XPROCESS (proc
)->encoding_buf
= make_uninit_string (require
);
2963 if (BUFFERP (object
))
2964 buf
= (char *) BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
2965 else if (STRINGP (object
))
2966 buf
= offset
+ (char *) XSTRING (object
)->data
;
2969 object
= XPROCESS (proc
)->encoding_buf
;
2970 len
= encode_coding (coding
, buf
, XSTRING (object
)->data
,
2971 len
, XSTRING (object
)->size
, &dummy
);
2972 buf
= XSTRING (object
)->data
;
2978 vs
= get_vms_process_pointer (p
->pid
);
2980 error ("Could not find this process: %x", p
->pid
);
2981 else if (write_to_vms_process (vs
, buf
, len
))
2985 if (pty_max_bytes
== 0)
2987 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
2988 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
2990 if (pty_max_bytes
< 0)
2991 pty_max_bytes
= 250;
2993 pty_max_bytes
= 250;
2995 /* Deduct one, to leave space for the eof. */
2999 if (!setjmp (send_process_frame
))
3003 SIGTYPE (*old_sigpipe
)();
3006 /* Decide how much data we can send in one batch.
3007 Long lines need to be split into multiple batches. */
3008 if (!NILP (XPROCESS (proc
)->pty_flag
))
3010 /* Starting this at zero is always correct when not the first iteration
3011 because the previous iteration ended by sending C-d.
3012 It may not be correct for the first iteration
3013 if a partial line was sent in a separate send_process call.
3014 If that proves worth handling, we need to save linepos
3015 in the process object. */
3018 char *end
= buf
+ len
;
3020 /* Scan through this text for a line that is too long. */
3021 while (ptr
!= end
&& linepos
< pty_max_bytes
)
3029 /* If we found one, break the line there
3030 and put in a C-d to force the buffer through. */
3034 /* Send this batch, using one or more write calls. */
3037 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
3038 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
3039 signal (SIGPIPE
, old_sigpipe
);
3045 || errno
== EWOULDBLOCK
3051 /* Buffer is full. Wait, accepting input;
3052 that may allow the program
3053 to finish doing output and read more. */
3058 /* Running filters might relocate buffers or strings.
3059 Arrange to relocate BUF. */
3060 if (BUFFERP (object
))
3061 offset
= BUF_PTR_CHAR_POS (XBUFFER (object
),
3062 (unsigned char *) buf
);
3063 else if (STRINGP (object
))
3064 offset
= buf
- (char *) XSTRING (object
)->data
;
3066 XSETFASTINT (zero
, 0);
3067 #ifdef EMACS_HAS_USECS
3068 wait_reading_process_input (0, 20000, zero
, 0);
3070 wait_reading_process_input (1, 0, zero
, 0);
3073 if (BUFFERP (object
))
3074 buf
= (char *) BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
3075 else if (STRINGP (object
))
3076 buf
= offset
+ (char *) XSTRING (object
)->data
;
3081 /* This is a real error. */
3082 report_file_error ("writing to process", Fcons (proc
, Qnil
));
3089 /* If we sent just part of the string, put in an EOF
3090 to force it through, before we send the rest. */
3092 Fprocess_send_eof (proc
);
3097 XPROCESS (proc
)->raw_status_low
= Qnil
;
3098 XPROCESS (proc
)->raw_status_high
= Qnil
;
3099 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
3100 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
3101 deactivate_process (proc
);
3103 error ("Error writing to process %s; closed it", procname
);
3105 error ("SIGPIPE raised on process %s; closed it", procname
);
3112 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
3114 "Send current contents of region as input to PROCESS.\n\
3115 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3116 nil, indicating the current buffer's process.\n\
3117 Called from program, takes three arguments, PROCESS, START and END.\n\
3118 If the region is more than 500 characters long,\n\
3119 it is sent in several bunches. This may happen even for shorter regions.\n\
3120 Output from processes can arrive in between bunches.")
3121 (process
, start
, end
)
3122 Lisp_Object process
, start
, end
;
3127 proc
= get_process (process
);
3128 validate_region (&start
, &end
);
3130 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
3133 start1
= XINT (start
);
3134 send_process (proc
, POS_ADDR (start1
), XINT (end
) - XINT (start
),
3135 Fcurrent_buffer ());
3140 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
3142 "Send PROCESS the contents of STRING as input.\n\
3143 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3144 nil, indicating the current buffer's process.\n\
3145 If STRING is more than 500 characters long,\n\
3146 it is sent in several bunches. This may happen even for shorter strings.\n\
3147 Output from processes can arrive in between bunches.")
3149 Lisp_Object process
, string
;
3152 CHECK_STRING (string
, 1);
3153 proc
= get_process (process
);
3154 send_process (proc
, XSTRING (string
)->data
, XSTRING (string
)->size
, string
);
3158 /* send a signal number SIGNO to PROCESS.
3159 CURRENT_GROUP means send to the process group that currently owns
3160 the terminal being used to communicate with PROCESS.
3161 This is used for various commands in shell mode.
3162 If NOMSG is zero, insert signal-announcements into process's buffers
3165 If we can, we try to signal PROCESS by sending control characters
3166 down the pty. This allows us to signal inferiors who have changed
3167 their uid, for which killpg would return an EPERM error. */
3170 process_send_signal (process
, signo
, current_group
, nomsg
)
3171 Lisp_Object process
;
3173 Lisp_Object current_group
;
3177 register struct Lisp_Process
*p
;
3181 proc
= get_process (process
);
3182 p
= XPROCESS (proc
);
3184 if (!EQ (p
->childp
, Qt
))
3185 error ("Process %s is not a subprocess",
3186 XSTRING (p
->name
)->data
);
3187 if (XINT (p
->infd
) < 0)
3188 error ("Process %s is not active",
3189 XSTRING (p
->name
)->data
);
3191 if (NILP (p
->pty_flag
))
3192 current_group
= Qnil
;
3194 /* If we are using pgrps, get a pgrp number and make it negative. */
3195 if (!NILP (current_group
))
3197 #ifdef SIGNALS_VIA_CHARACTERS
3198 /* If possible, send signals to the entire pgrp
3199 by sending an input character to it. */
3201 /* TERMIOS is the latest and bestest, and seems most likely to
3202 work. If the system has it, use it. */
3209 tcgetattr (XINT (p
->infd
), &t
);
3210 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
3214 tcgetattr (XINT (p
->infd
), &t
);
3215 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
3219 tcgetattr (XINT (p
->infd
), &t
);
3220 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
3221 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
3223 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
3228 #else /* ! HAVE_TERMIOS */
3230 /* On Berkeley descendants, the following IOCTL's retrieve the
3231 current control characters. */
3232 #if defined (TIOCGLTC) && defined (TIOCGETC)
3240 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
3241 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
3244 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
3245 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
3249 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
3250 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
3252 #endif /* ! defined (SIGTSTP) */
3255 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
3257 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
3264 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3265 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
3268 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3269 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
3273 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3274 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
3276 #endif /* ! defined (SIGTSTP) */
3278 #else /* ! defined (TCGETA) */
3279 Your configuration files are messed up
.
3280 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
3281 you'd better be using one of the alternatives above! */
3282 #endif /* ! defined (TCGETA) */
3283 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
3284 #endif /* ! defined HAVE_TERMIOS */
3285 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
3288 /* Get the pgrp using the tty itself, if we have that.
3289 Otherwise, use the pty to get the pgrp.
3290 On pfa systems, saka@pfu.fujitsu.co.JP writes:
3291 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
3292 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
3293 His patch indicates that if TIOCGPGRP returns an error, then
3294 we should just assume that p->pid is also the process group id. */
3298 if (!NILP (p
->subtty
))
3299 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
3301 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
3305 gid
= - XFASTINT (p
->pid
);
3306 #endif /* ! defined (pfa) */
3312 #else /* ! defined (TIOCGPGRP ) */
3313 /* Can't select pgrps on this system, so we know that
3314 the child itself heads the pgrp. */
3315 gid
= - XFASTINT (p
->pid
);
3316 #endif /* ! defined (TIOCGPGRP ) */
3319 gid
= - XFASTINT (p
->pid
);
3325 p
->raw_status_low
= Qnil
;
3326 p
->raw_status_high
= Qnil
;
3328 XSETINT (p
->tick
, ++process_tick
);
3332 #endif /* ! defined (SIGCONT) */
3335 send_process (proc
, "\003", 1, Qnil
); /* ^C */
3340 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
3345 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
3348 flush_pending_output (XINT (p
->infd
));
3352 /* If we don't have process groups, send the signal to the immediate
3353 subprocess. That isn't really right, but it's better than any
3354 obvious alternative. */
3357 kill (XFASTINT (p
->pid
), signo
);
3361 /* gid may be a pid, or minus a pgrp's number */
3363 if (!NILP (current_group
))
3364 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
3367 gid
= - XFASTINT (p
->pid
);
3370 #else /* ! defined (TIOCSIGSEND) */
3371 EMACS_KILLPG (-gid
, signo
);
3372 #endif /* ! defined (TIOCSIGSEND) */
3375 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
3376 "Interrupt process PROCESS. May be process or name of one.\n\
3377 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
3378 nil or no arg means current buffer's process.\n\
3379 Second arg CURRENT-GROUP non-nil means send signal to\n\
3380 the current process-group of the process's controlling terminal\n\
3381 rather than to the process's own process group.\n\
3382 If the process is a shell, this means interrupt current subjob\n\
3383 rather than the shell.")
3384 (process
, current_group
)
3385 Lisp_Object process
, current_group
;
3387 process_send_signal (process
, SIGINT
, current_group
, 0);
3391 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
3392 "Kill process PROCESS. May be process or name of one.\n\
3393 See function `interrupt-process' for more details on usage.")
3394 (process
, current_group
)
3395 Lisp_Object process
, current_group
;
3397 process_send_signal (process
, SIGKILL
, current_group
, 0);
3401 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
3402 "Send QUIT signal to process PROCESS. May be process or name of one.\n\
3403 See function `interrupt-process' for more details on usage.")
3404 (process
, current_group
)
3405 Lisp_Object process
, current_group
;
3407 process_send_signal (process
, SIGQUIT
, current_group
, 0);
3411 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
3412 "Stop process PROCESS. May be process or name of one.\n\
3413 See function `interrupt-process' for more details on usage.")
3414 (process
, current_group
)
3415 Lisp_Object process
, current_group
;
3418 error ("no SIGTSTP support");
3420 process_send_signal (process
, SIGTSTP
, current_group
, 0);
3425 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
3426 "Continue process PROCESS. May be process or name of one.\n\
3427 See function `interrupt-process' for more details on usage.")
3428 (process
, current_group
)
3429 Lisp_Object process
, current_group
;
3432 process_send_signal (process
, SIGCONT
, current_group
, 0);
3434 error ("no SIGCONT support");
3439 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
3440 2, 2, "nProcess number: \nnSignal code: ",
3441 "Send the process with process id PID the signal with code SIGCODE.\n\
3442 PID must be an integer. The process need not be a child of this Emacs.\n\
3443 SIGCODE may be an integer, or a symbol whose name is a signal name.")
3445 Lisp_Object pid
, sigcode
;
3447 CHECK_NUMBER (pid
, 0);
3449 #define handle_signal(NAME, VALUE) \
3450 else if (!strcmp (name, NAME)) \
3451 XSETINT (sigcode, VALUE)
3453 if (INTEGERP (sigcode
))
3457 unsigned char *name
;
3459 CHECK_SYMBOL (sigcode
, 1);
3460 name
= XSYMBOL (sigcode
)->name
->data
;
3465 handle_signal ("SIGHUP", SIGHUP
);
3468 handle_signal ("SIGINT", SIGINT
);
3471 handle_signal ("SIGQUIT", SIGQUIT
);
3474 handle_signal ("SIGILL", SIGILL
);
3477 handle_signal ("SIGABRT", SIGABRT
);
3480 handle_signal ("SIGEMT", SIGEMT
);
3483 handle_signal ("SIGKILL", SIGKILL
);
3486 handle_signal ("SIGFPE", SIGFPE
);
3489 handle_signal ("SIGBUS", SIGBUS
);
3492 handle_signal ("SIGSEGV", SIGSEGV
);
3495 handle_signal ("SIGSYS", SIGSYS
);
3498 handle_signal ("SIGPIPE", SIGPIPE
);
3501 handle_signal ("SIGALRM", SIGALRM
);
3504 handle_signal ("SIGTERM", SIGTERM
);
3507 handle_signal ("SIGURG", SIGURG
);
3510 handle_signal ("SIGSTOP", SIGSTOP
);
3513 handle_signal ("SIGTSTP", SIGTSTP
);
3516 handle_signal ("SIGCONT", SIGCONT
);
3519 handle_signal ("SIGCHLD", SIGCHLD
);
3522 handle_signal ("SIGTTIN", SIGTTIN
);
3525 handle_signal ("SIGTTOU", SIGTTOU
);
3528 handle_signal ("SIGIO", SIGIO
);
3531 handle_signal ("SIGXCPU", SIGXCPU
);
3534 handle_signal ("SIGXFSZ", SIGXFSZ
);
3537 handle_signal ("SIGVTALRM", SIGVTALRM
);
3540 handle_signal ("SIGPROF", SIGPROF
);
3543 handle_signal ("SIGWINCH", SIGWINCH
);
3546 handle_signal ("SIGINFO", SIGINFO
);
3549 handle_signal ("SIGUSR1", SIGUSR1
);
3552 handle_signal ("SIGUSR2", SIGUSR2
);
3555 error ("Undefined signal name %s", name
);
3558 #undef handle_signal
3560 return make_number (kill (XINT (pid
), XINT (sigcode
)));
3563 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
3564 "Make PROCESS see end-of-file in its input.\n\
3565 Eof comes after any text already sent to it.\n\
3566 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3567 nil, indicating the current buffer's process.\n\
3568 If PROCESS is a network connection, or is a process communicating\n\
3569 through a pipe (as opposed to a pty), then you cannot send any more\n\
3570 text to PROCESS after you call this function.")
3572 Lisp_Object process
;
3576 proc
= get_process (process
);
3578 /* Make sure the process is really alive. */
3579 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3580 update_status (XPROCESS (proc
));
3581 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3582 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
3585 send_process (proc
, "\032", 1, Qnil
); /* ^z */
3587 if (!NILP (XPROCESS (proc
)->pty_flag
))
3588 send_process (proc
, "\004", 1, Qnil
);
3591 close (XINT (XPROCESS (proc
)->outfd
));
3592 XSETINT (XPROCESS (proc
)->outfd
, open (NULL_DEVICE
, O_WRONLY
));
3598 /* Kill all processes associated with `buffer'.
3599 If `buffer' is nil, kill all processes */
3601 kill_buffer_processes (buffer
)
3604 Lisp_Object tail
, proc
;
3606 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3608 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3609 if (GC_PROCESSP (proc
)
3610 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
3612 if (NETCONN_P (proc
))
3613 Fdelete_process (proc
);
3614 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
3615 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
3620 /* On receipt of a signal that a child status has changed,
3621 loop asking about children with changed statuses until
3622 the system says there are no more.
3623 All we do is change the status;
3624 we do not run sentinels or print notifications.
3625 That is saved for the next time keyboard input is done,
3626 in order to avoid timing errors. */
3628 /** WARNING: this can be called during garbage collection.
3629 Therefore, it must not be fooled by the presence of mark bits in
3632 /** USG WARNING: Although it is not obvious from the documentation
3633 in signal(2), on a USG system the SIGCLD handler MUST NOT call
3634 signal() before executing at least one wait(), otherwise the handler
3635 will be called again, resulting in an infinite loop. The relevant
3636 portion of the documentation reads "SIGCLD signals will be queued
3637 and the signal-catching function will be continually reentered until
3638 the queue is empty". Invoking signal() causes the kernel to reexamine
3639 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
3642 sigchld_handler (signo
)
3645 int old_errno
= errno
;
3647 register struct Lisp_Process
*p
;
3648 extern EMACS_TIME
*input_available_clear_time
;
3652 sigheld
|= sigbit (SIGCHLD
);
3664 #endif /* no WUNTRACED */
3665 /* Keep trying to get a status until we get a definitive result. */
3669 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
3671 while (pid
<= 0 && errno
== EINTR
);
3675 /* A real failure. We have done all our job, so return. */
3677 /* USG systems forget handlers when they are used;
3678 must reestablish each time */
3679 #if defined (USG) && !defined (POSIX_SIGNALS)
3680 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
3683 sigheld
&= ~sigbit (SIGCHLD
);
3691 #endif /* no WNOHANG */
3693 /* Find the process that signaled us, and record its status. */
3696 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3698 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3699 p
= XPROCESS (proc
);
3700 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
3705 /* Look for an asynchronous process whose pid hasn't been filled
3708 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3710 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3711 p
= XPROCESS (proc
);
3712 if (INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
3717 /* Change the status of the process that was found. */
3720 union { int i
; WAITTYPE wt
; } u
;
3721 int clear_desc_flag
= 0;
3723 XSETINT (p
->tick
, ++process_tick
);
3725 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
3726 XSETINT (p
->raw_status_high
, u
.i
>> 16);
3728 /* If process has terminated, stop waiting for its output. */
3729 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
3730 && XINT (p
->infd
) >= 0)
3731 clear_desc_flag
= 1;
3733 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
3734 if (clear_desc_flag
)
3736 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
3737 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
3740 /* Tell wait_reading_process_input that it needs to wake up and
3742 if (input_available_clear_time
)
3743 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3746 /* There was no asynchronous process found for that id. Check
3747 if we have a synchronous process. */
3750 synch_process_alive
= 0;
3752 /* Report the status of the synchronous process. */
3754 synch_process_retcode
= WRETCODE (w
);
3755 else if (WIFSIGNALED (w
))
3757 int code
= WTERMSIG (w
);
3763 /* Suppress warning if the table has const char *. */
3764 signame
= (char *) sys_siglist
[code
];
3766 signame
= sys_errlist
[code
];
3770 signame
= "unknown";
3772 synch_process_death
= signame
;
3775 /* Tell wait_reading_process_input that it needs to wake up and
3777 if (input_available_clear_time
)
3778 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3781 /* On some systems, we must return right away.
3782 If any more processes want to signal us, we will
3784 Otherwise (on systems that have WNOHANG), loop around
3785 to use up all the processes that have something to tell us. */
3786 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT)
3787 #if defined (USG) && ! defined (POSIX_SIGNALS)
3788 signal (signo
, sigchld_handler
);
3792 #endif /* USG, but not HPUX with WNOHANG */
3798 exec_sentinel_unwind (data
)
3801 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
3806 exec_sentinel_error_handler (error
)
3809 cmd_error_internal (error
, "error in process sentinel: ");
3811 update_echo_area ();
3812 Fsleep_for (make_number (2), Qnil
);
3816 exec_sentinel (proc
, reason
)
3817 Lisp_Object proc
, reason
;
3819 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
3820 register struct Lisp_Process
*p
= XPROCESS (proc
);
3821 int count
= specpdl_ptr
- specpdl
;
3822 int outer_running_asynch_code
= running_asynch_code
;
3824 /* No need to gcpro these, because all we do with them later
3825 is test them for EQness, and none of them should be a string. */
3826 odeactivate
= Vdeactivate_mark
;
3827 XSETBUFFER (obuffer
, current_buffer
);
3828 okeymap
= current_buffer
->keymap
;
3830 sentinel
= p
->sentinel
;
3831 if (NILP (sentinel
))
3834 /* Zilch the sentinel while it's running, to avoid recursive invocations;
3835 assure that it gets restored no matter how the sentinel exits. */
3837 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
3838 /* Inhibit quit so that random quits don't screw up a running filter. */
3839 specbind (Qinhibit_quit
, Qt
);
3840 specbind (Qlast_nonmenu_event
, Qt
);
3842 /* In case we get recursively called,
3843 and we already saved the match data nonrecursively,
3844 save the same match data in safely recursive fashion. */
3845 if (outer_running_asynch_code
)
3848 tem
= Fmatch_data (Qnil
, Qnil
);
3849 restore_match_data ();
3850 record_unwind_protect (Fstore_match_data
, Fmatch_data (Qnil
, Qnil
));
3851 Fstore_match_data (tem
);
3854 /* For speed, if a search happens within this code,
3855 save the match data in a special nonrecursive fashion. */
3856 running_asynch_code
= 1;
3858 internal_condition_case_1 (read_process_output_call
,
3860 Fcons (proc
, Fcons (reason
, Qnil
))),
3861 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
3862 exec_sentinel_error_handler
);
3864 /* If we saved the match data nonrecursively, restore it now. */
3865 restore_match_data ();
3866 running_asynch_code
= outer_running_asynch_code
;
3868 Vdeactivate_mark
= odeactivate
;
3870 if (! EQ (Fcurrent_buffer (), obuffer
)
3871 || ! EQ (current_buffer
->keymap
, okeymap
))
3873 /* But do it only if the caller is actually going to read events.
3874 Otherwise there's no need to make him wake up, and it could
3875 cause trouble (for example it would make Fsit_for return). */
3876 if (waiting_for_user_input_p
== -1)
3877 record_asynch_buffer_change ();
3879 unbind_to (count
, Qnil
);
3882 /* Report all recent events of a change in process status
3883 (either run the sentinel or output a message).
3884 This is done while Emacs is waiting for keyboard input. */
3888 register Lisp_Object proc
, buffer
;
3889 Lisp_Object tail
, msg
;
3890 struct gcpro gcpro1
, gcpro2
;
3894 /* We need to gcpro tail; if read_process_output calls a filter
3895 which deletes a process and removes the cons to which tail points
3896 from Vprocess_alist, and then causes a GC, tail is an unprotected
3900 /* Set this now, so that if new processes are created by sentinels
3901 that we run, we get called again to handle their status changes. */
3902 update_tick
= process_tick
;
3904 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
3907 register struct Lisp_Process
*p
;
3909 proc
= Fcdr (Fcar (tail
));
3910 p
= XPROCESS (proc
);
3912 if (XINT (p
->tick
) != XINT (p
->update_tick
))
3914 XSETINT (p
->update_tick
, XINT (p
->tick
));
3916 /* If process is still active, read any output that remains. */
3917 while (! EQ (p
->filter
, Qt
)
3918 && XINT (p
->infd
) >= 0
3919 && read_process_output (proc
, XINT (p
->infd
)) > 0);
3923 /* Get the text to use for the message. */
3924 if (!NILP (p
->raw_status_low
))
3926 msg
= status_message (p
->status
);
3928 /* If process is terminated, deactivate it or delete it. */
3930 if (CONSP (p
->status
))
3931 symbol
= XCONS (p
->status
)->car
;
3933 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
3934 || EQ (symbol
, Qclosed
))
3936 if (delete_exited_processes
)
3937 remove_process (proc
);
3939 deactivate_process (proc
);
3942 /* The actions above may have further incremented p->tick.
3943 So set p->update_tick again
3944 so that an error in the sentinel will not cause
3945 this code to be run again. */
3946 XSETINT (p
->update_tick
, XINT (p
->tick
));
3947 /* Now output the message suitably. */
3948 if (!NILP (p
->sentinel
))
3949 exec_sentinel (proc
, msg
);
3950 /* Don't bother with a message in the buffer
3951 when a process becomes runnable. */
3952 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
3954 Lisp_Object ro
, tem
;
3955 struct buffer
*old
= current_buffer
;
3958 ro
= XBUFFER (buffer
)->read_only
;
3960 /* Avoid error if buffer is deleted
3961 (probably that's why the process is dead, too) */
3962 if (NILP (XBUFFER (buffer
)->name
))
3964 Fset_buffer (buffer
);
3966 /* Insert new output into buffer
3967 at the current end-of-output marker,
3968 thus preserving logical ordering of input and output. */
3969 if (XMARKER (p
->mark
)->buffer
)
3970 SET_PT (marker_position (p
->mark
));
3974 opoint
+= XSTRING (msg
)->size
+ XSTRING (p
->name
)->size
+ 10;
3976 tem
= current_buffer
->read_only
;
3977 current_buffer
->read_only
= Qnil
;
3978 insert_string ("\nProcess ");
3979 Finsert (1, &p
->name
);
3980 insert_string (" ");
3982 current_buffer
->read_only
= tem
;
3983 Fset_marker (p
->mark
, make_number (PT
), p
->buffer
);
3986 set_buffer_internal (old
);
3991 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
3992 redisplay_preserve_echo_area ();
3998 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
3999 Sset_process_coding_system
, 1, 3, 0,
4000 "Set coding-systems of PROCESS to DECODING (input from the process) and\n\
4001 ENCODING (output to the process).")
4002 (proc
, decoding
, encoding
)
4003 register Lisp_Object proc
, decoding
, encoding
;
4005 register struct Lisp_Process
*p
;
4007 CHECK_PROCESS (proc
, 0);
4008 p
= XPROCESS (proc
);
4009 if (XINT (p
->infd
) < 0)
4010 error ("Input file descriptor of %s closed", XSTRING (p
->name
)->data
);
4011 if (XINT (p
->outfd
) < 0)
4012 error ("Output file descriptor of %s closed", XSTRING (p
->name
)->data
);
4014 p
->decode_coding_system
= Fcheck_coding_system (decoding
);
4015 p
->encode_coding_system
= Fcheck_coding_system (encoding
);
4016 setup_coding_system (decoding
,
4017 proc_decode_coding_system
[XINT (p
->infd
)]);
4018 setup_coding_system (encoding
,
4019 proc_encode_coding_system
[XINT (p
->outfd
)]);
4024 DEFUN ("process-coding-system",
4025 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
4026 "Return a cons of coding-system for decoding and encoding of PROCESS.")
4028 register Lisp_Object proc
;
4030 CHECK_PROCESS (proc
, 0);
4031 return Fcons (XPROCESS (proc
)->decode_coding_system
,
4032 XPROCESS (proc
)->encode_coding_system
);
4035 /* The first time this is called, assume keyboard input comes from DESC
4036 instead of from where we used to expect it.
4037 Subsequent calls mean assume input keyboard can come from DESC
4038 in addition to other places. */
4040 static int add_keyboard_wait_descriptor_called_flag
;
4043 add_keyboard_wait_descriptor (desc
)
4046 if (! add_keyboard_wait_descriptor_called_flag
)
4047 FD_CLR (0, &input_wait_mask
);
4048 add_keyboard_wait_descriptor_called_flag
= 1;
4049 FD_SET (desc
, &input_wait_mask
);
4050 FD_SET (desc
, &non_process_wait_mask
);
4051 if (desc
> max_keyboard_desc
)
4052 max_keyboard_desc
= desc
;
4055 /* From now on, do not expect DESC to give keyboard input. */
4058 delete_keyboard_wait_descriptor (desc
)
4062 int lim
= max_keyboard_desc
;
4064 FD_CLR (desc
, &input_wait_mask
);
4065 FD_CLR (desc
, &non_process_wait_mask
);
4067 if (desc
== max_keyboard_desc
)
4068 for (fd
= 0; fd
< lim
; fd
++)
4069 if (FD_ISSET (fd
, &input_wait_mask
)
4070 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
4071 max_keyboard_desc
= fd
;
4074 /* Return nonzero if *MASK has a bit set
4075 that corresponds to one of the keyboard input descriptors. */
4078 keyboard_bit_set (mask
)
4083 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
4084 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
4085 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
4097 if (! noninteractive
|| initialized
)
4099 signal (SIGCHLD
, sigchld_handler
);
4102 FD_ZERO (&input_wait_mask
);
4103 FD_ZERO (&non_keyboard_wait_mask
);
4104 FD_ZERO (&non_process_wait_mask
);
4105 max_process_desc
= 0;
4107 FD_SET (0, &input_wait_mask
);
4109 Vprocess_alist
= Qnil
;
4110 for (i
= 0; i
< MAXDESC
; i
++)
4112 chan_process
[i
] = Qnil
;
4113 proc_buffered_char
[i
] = -1;
4115 bzero (proc_decode_coding_system
, sizeof proc_decode_coding_system
);
4116 bzero (proc_encode_coding_system
, sizeof proc_encode_coding_system
);
4121 Qprocessp
= intern ("processp");
4122 staticpro (&Qprocessp
);
4123 Qrun
= intern ("run");
4125 Qstop
= intern ("stop");
4127 Qsignal
= intern ("signal");
4128 staticpro (&Qsignal
);
4130 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
4133 Qexit = intern ("exit");
4134 staticpro (&Qexit); */
4136 Qopen
= intern ("open");
4138 Qclosed
= intern ("closed");
4139 staticpro (&Qclosed
);
4141 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
4142 staticpro (&Qlast_nonmenu_event
);
4144 staticpro (&Vprocess_alist
);
4146 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
4147 "*Non-nil means delete processes immediately when they exit.\n\
4148 nil means don't delete them until `list-processes' is run.");
4150 delete_exited_processes
= 1;
4152 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
4153 "Control type of device used to communicate with subprocesses.\n\
4154 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
4155 The value has no effect if the system has no ptys or if all ptys are busy:\n\
4156 then a pipe is used in any case.\n\
4157 The value takes effect when `start-process' is called.");
4158 Vprocess_connection_type
= Qt
;
4160 defsubr (&Sprocessp
);
4161 defsubr (&Sget_process
);
4162 defsubr (&Sget_buffer_process
);
4163 defsubr (&Sdelete_process
);
4164 defsubr (&Sprocess_status
);
4165 defsubr (&Sprocess_exit_status
);
4166 defsubr (&Sprocess_id
);
4167 defsubr (&Sprocess_name
);
4168 defsubr (&Sprocess_tty_name
);
4169 defsubr (&Sprocess_command
);
4170 defsubr (&Sset_process_buffer
);
4171 defsubr (&Sprocess_buffer
);
4172 defsubr (&Sprocess_mark
);
4173 defsubr (&Sset_process_filter
);
4174 defsubr (&Sprocess_filter
);
4175 defsubr (&Sset_process_sentinel
);
4176 defsubr (&Sprocess_sentinel
);
4177 defsubr (&Sset_process_window_size
);
4178 defsubr (&Sprocess_kill_without_query
);
4179 defsubr (&Sprocess_contact
);
4180 defsubr (&Slist_processes
);
4181 defsubr (&Sprocess_list
);
4182 defsubr (&Sstart_process
);
4184 defsubr (&Sopen_network_stream
);
4185 #endif /* HAVE_SOCKETS */
4186 defsubr (&Saccept_process_output
);
4187 defsubr (&Sprocess_send_region
);
4188 defsubr (&Sprocess_send_string
);
4189 defsubr (&Sinterrupt_process
);
4190 defsubr (&Skill_process
);
4191 defsubr (&Squit_process
);
4192 defsubr (&Sstop_process
);
4193 defsubr (&Scontinue_process
);
4194 defsubr (&Sprocess_send_eof
);
4195 defsubr (&Ssignal_process
);
4196 defsubr (&Swaiting_for_user_input_p
);
4197 /* defsubr (&Sprocess_connection); */
4198 defsubr (&Sset_process_coding_system
);
4199 defsubr (&Sprocess_coding_system
);
4203 #else /* not subprocesses */
4205 #include <sys/types.h>
4209 #include "systime.h"
4210 #include "termopts.h"
4211 #include "sysselect.h"
4213 extern int frame_garbaged
;
4215 extern EMACS_TIME
timer_check ();
4216 extern int timers_run
;
4218 /* As described above, except assuming that there are no subprocesses:
4220 Wait for timeout to elapse and/or keyboard input to be available.
4223 timeout in seconds, or
4224 zero for no limit, or
4225 -1 means gobble data immediately available but don't wait for any.
4227 read_kbd is a Lisp_Object:
4228 0 to ignore keyboard input, or
4229 1 to return when input is available, or
4230 -1 means caller will actually read the input, so don't throw to
4232 a cons cell, meaning wait until its car is non-nil
4233 (and gobble terminal input into the buffer if any arrives), or
4234 We know that read_kbd will never be a Lisp_Process, since
4235 `subprocesses' isn't defined.
4237 do_display != 0 means redisplay should be done to show subprocess
4238 output that arrives.
4240 Return true iff we received input from any process. */
4243 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
4244 int time_limit
, microsecs
;
4245 Lisp_Object read_kbd
;
4248 EMACS_TIME end_time
, timeout
;
4249 SELECT_TYPE waitchannels
;
4251 Lisp_Object
*wait_for_cell
= 0;
4253 /* If waiting for non-nil in a cell, record where. */
4254 if (CONSP (read_kbd
))
4256 wait_for_cell
= &XCONS (read_kbd
)->car
;
4257 XSETFASTINT (read_kbd
, 0);
4260 /* What does time_limit really mean? */
4261 if (time_limit
|| microsecs
)
4263 if (time_limit
== -1)
4264 /* In fact, it's zero. */
4265 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4267 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4269 /* How far in the future is that? */
4270 EMACS_GET_TIME (end_time
);
4271 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4274 /* It's infinite. */
4275 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4277 /* Turn off periodic alarms (in case they are in use)
4278 because the select emulator uses alarms. */
4284 int timeout_reduced_for_timers
= 0;
4286 /* If calling from keyboard input, do not quit
4287 since we want to return C-g as an input character.
4288 Otherwise, do pending quit if requested. */
4289 if (XINT (read_kbd
) >= 0)
4292 /* Exit now if the cell we're waiting for became non-nil. */
4293 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
4296 /* Compute time from now till when time limit is up */
4297 /* Exit if already run out */
4298 if (time_limit
> 0 || microsecs
)
4300 EMACS_GET_TIME (timeout
);
4301 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4302 if (EMACS_TIME_NEG_P (timeout
))
4306 /* If our caller will not immediately handle keyboard events,
4307 run timer events directly.
4308 (Callers that will immediately read keyboard events
4309 call timer_delay on their own.) */
4310 if (! wait_for_cell
)
4312 EMACS_TIME timer_delay
;
4316 old_timers_run
= timers_run
;
4317 timer_delay
= timer_check (1);
4318 if (timers_run
!= old_timers_run
&& do_display
)
4320 redisplay_preserve_echo_area ();
4321 /* We must retry, since a timer may have requeued itself
4322 and that could alter the time delay. */
4326 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4328 EMACS_TIME difference
;
4329 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4330 if (EMACS_TIME_NEG_P (difference
))
4332 timeout
= timer_delay
;
4333 timeout_reduced_for_timers
= 1;
4338 /* Cause C-g and alarm signals to take immediate action,
4339 and cause input available signals to zero out timeout. */
4340 if (XINT (read_kbd
) < 0)
4341 set_waiting_for_input (&timeout
);
4343 /* Wait till there is something to do. */
4345 if (! XINT (read_kbd
) && wait_for_cell
== 0)
4346 FD_ZERO (&waitchannels
);
4348 FD_SET (0, &waitchannels
);
4350 /* If a frame has been newly mapped and needs updating,
4351 reprocess its display stuff. */
4352 if (frame_garbaged
&& do_display
)
4354 clear_waiting_for_input ();
4355 redisplay_preserve_echo_area ();
4356 if (XINT (read_kbd
) < 0)
4357 set_waiting_for_input (&timeout
);
4360 if (XINT (read_kbd
) && detect_input_pending ())
4363 FD_ZERO (&waitchannels
);
4366 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
4371 /* Make C-g and alarm signals set flags again */
4372 clear_waiting_for_input ();
4374 /* If we woke up due to SIGWINCH, actually change size now. */
4375 do_pending_window_change ();
4377 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4378 /* We waited the full specified time, so return now. */
4383 /* If the system call was interrupted, then go around the
4385 if (xerrno
== EINTR
)
4386 FD_ZERO (&waitchannels
);
4388 error ("select error: %s", strerror (xerrno
));
4391 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
4392 /* System sometimes fails to deliver SIGIO. */
4393 kill (getpid (), SIGIO
);
4396 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
4397 kill (getpid (), SIGIO
);
4400 /* Check for keyboard input */
4402 if ((XINT (read_kbd
) != 0)
4403 && detect_input_pending_run_timers (do_display
))
4405 swallow_events (do_display
);
4406 if (detect_input_pending_run_timers (do_display
))
4410 /* If wait_for_cell. check for keyboard input
4411 but don't run any timers.
4412 ??? (It seems wrong to me to check for keyboard
4413 input at all when wait_for_cell, but the code
4414 has been this way since July 1994.
4415 Try changing this after version 19.31.) */
4417 && detect_input_pending ())
4419 swallow_events (do_display
);
4420 if (detect_input_pending ())
4424 /* Exit now if the cell we're waiting for became non-nil. */
4425 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
4435 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
4436 /* Don't confuse make-docfile by having two doc strings for this function.
4437 make-docfile does not pay attention to #if, for good reason! */
4440 register Lisp_Object name
;
4445 /* Kill all processes associated with `buffer'.
4446 If `buffer' is nil, kill all processes.
4447 Since we have no subprocesses, this does nothing. */
4449 kill_buffer_processes (buffer
)
4460 defsubr (&Sget_buffer_process
);
4464 #endif /* not subprocesses */