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 #define max(a, b) ((a) > (b) ? (a) : (b))
112 Lisp_Object Qprocessp
;
113 Lisp_Object Qrun
, Qstop
, Qsignal
, Qopen
, Qclosed
;
114 Lisp_Object Qlast_nonmenu_event
;
115 /* Qexit is declared and initialized in eval.c. */
117 /* a process object is a network connection when its childp field is neither
118 Qt nor Qnil but is instead a cons cell (HOSTNAME PORTNUM). */
121 #define NETCONN_P(p) (GC_CONSP (XPROCESS (p)->childp))
123 #define NETCONN_P(p) 0
124 #endif /* HAVE_SOCKETS */
126 /* Define first descriptor number available for subprocesses. */
128 #define FIRST_PROC_DESC 1
130 #define FIRST_PROC_DESC 3
133 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
136 #if !defined (SIGCHLD) && defined (SIGCLD)
137 #define SIGCHLD SIGCLD
140 #include "syssignal.h"
145 extern char *strerror ();
147 extern char *sys_errlist
[];
154 #ifndef SYS_SIGLIST_DECLARED
159 extern char *sys_siglist
[];
160 #endif /* not LINUX */
162 char *sys_siglist
[] =
168 "illegal instruction",
172 "floating point exception",
175 "segmentation violation",
176 "bad argument to system call",
177 "write on a pipe with no one to read it",
179 "software termination signal from kill",
181 "sendable stop signal not from tty",
182 "stop signal from tty",
183 "continue a stopped process",
184 "child status has changed",
185 "background read attempted from control tty",
186 "background write attempted from control tty",
187 "input record available at control tty",
188 "exceeded CPU time limit",
189 "exceeded file size limit"
191 #endif /* not WINDOWSNT */
194 #endif /* ! SYS_SIGLIST_DECLARED */
196 /* t means use pty, nil means use a pipe,
197 maybe other values to come. */
198 static Lisp_Object Vprocess_connection_type
;
202 #include <sys/socket.h>
206 /* These next two vars are non-static since sysdep.c uses them in the
207 emulation of `select'. */
208 /* Number of events of change of status of a process. */
210 /* Number of events for which the user or sentinel has been notified. */
213 #include "sysselect.h"
215 /* If we support a window system, turn on the code to poll periodically
216 to detect C-g. It isn't actually used when doing interrupt input. */
217 #ifdef HAVE_WINDOW_SYSTEM
218 #define POLL_FOR_INPUT
221 /* Mask of bits indicating the descriptors that we wait for input on. */
223 static SELECT_TYPE input_wait_mask
;
225 /* Mask that excludes keyboard input descriptor (s). */
227 static SELECT_TYPE non_keyboard_wait_mask
;
229 /* Mask that excludes process input descriptor (s). */
231 static SELECT_TYPE non_process_wait_mask
;
233 /* The largest descriptor currently in use for a process object. */
234 static int max_process_desc
;
236 /* The largest descriptor currently in use for keyboard input. */
237 static int max_keyboard_desc
;
239 /* Nonzero means delete a process right away if it exits. */
240 static int delete_exited_processes
;
242 /* Indexed by descriptor, gives the process (if any) for that descriptor */
243 Lisp_Object chan_process
[MAXDESC
];
245 /* Alist of elements (NAME . PROCESS) */
246 Lisp_Object Vprocess_alist
;
248 /* Buffered-ahead input char from process, indexed by channel.
249 -1 means empty (no char is buffered).
250 Used on sys V where the only way to tell if there is any
251 output from the process is to read at least one char.
252 Always -1 on systems that support FIONREAD. */
254 /* Don't make static; need to access externally. */
255 int proc_buffered_char
[MAXDESC
];
257 /* Table of `struct coding-system' for each process. */
258 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
259 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
261 static Lisp_Object
get_process ();
263 extern EMACS_TIME
timer_check ();
264 extern int timers_run
;
266 /* Maximum number of bytes to send to a pty without an eof. */
267 static int pty_max_bytes
;
269 extern Lisp_Object Vfile_name_coding_system
;
272 /* The file name of the pty opened by allocate_pty. */
274 static char pty_name
[24];
277 /* Compute the Lisp form of the process status, p->status, from
278 the numeric status that was returned by `wait'. */
280 Lisp_Object
status_convert ();
283 struct Lisp_Process
*p
;
285 union { int i
; WAITTYPE wt
; } u
;
286 u
.i
= XFASTINT (p
->raw_status_low
) + (XFASTINT (p
->raw_status_high
) << 16);
287 p
->status
= status_convert (u
.wt
);
288 p
->raw_status_low
= Qnil
;
289 p
->raw_status_high
= Qnil
;
292 /* Convert a process status word in Unix format to
293 the list that we use internally. */
300 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
301 else if (WIFEXITED (w
))
302 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
303 WCOREDUMP (w
) ? Qt
: Qnil
));
304 else if (WIFSIGNALED (w
))
305 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
306 WCOREDUMP (w
) ? Qt
: Qnil
));
311 /* Given a status-list, extract the three pieces of information
312 and store them individually through the three pointers. */
315 decode_status (l
, symbol
, code
, coredump
)
331 *symbol
= XCONS (l
)->car
;
332 tem
= XCONS (l
)->cdr
;
333 *code
= XFASTINT (XCONS (tem
)->car
);
334 tem
= XCONS (tem
)->cdr
;
335 *coredump
= !NILP (tem
);
339 /* Return a string describing a process status list. */
342 status_message (status
)
347 Lisp_Object string
, string2
;
349 decode_status (status
, &symbol
, &code
, &coredump
);
351 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
357 /* Cast to suppress warning if the table has const char *. */
358 signame
= (char *) sys_siglist
[code
];
360 signame
= sys_errlist
[code
];
365 string
= build_string (signame
);
366 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
367 XSTRING (string
)->data
[0] = DOWNCASE (XSTRING (string
)->data
[0]);
368 return concat2 (string
, string2
);
370 else if (EQ (symbol
, Qexit
))
373 return build_string ("finished\n");
374 string
= Fnumber_to_string (make_number (code
));
375 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
376 return concat2 (build_string ("exited abnormally with code "),
377 concat2 (string
, string2
));
380 return Fcopy_sequence (Fsymbol_name (symbol
));
385 /* Open an available pty, returning a file descriptor.
386 Return -1 on failure.
387 The file name of the terminal corresponding to the pty
388 is left in the variable pty_name. */
397 /* Some systems name their pseudoterminals so that there are gaps in
398 the usual sequence - for example, on HP9000/S700 systems, there
399 are no pseudoterminals with names ending in 'f'. So we wait for
400 three failures in a row before deciding that we've reached the
402 int failed_count
= 0;
407 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
408 for (i
= 0; i
< 16; i
++)
411 #ifdef PTY_NAME_SPRINTF
414 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
415 #endif /* no PTY_NAME_SPRINTF */
419 #else /* no PTY_OPEN */
421 /* Unusual IRIS code */
422 *ptyv
= open ("/dev/ptc", O_RDWR
| O_NDELAY
, 0);
425 if (fstat (fd
, &stb
) < 0)
428 if (stat (pty_name
, &stb
) < 0)
431 if (failed_count
>= 3)
437 fd
= open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
439 fd
= open (pty_name
, O_RDWR
| O_NDELAY
, 0);
441 #endif /* not IRIS */
442 #endif /* no PTY_OPEN */
446 /* check to make certain that both sides are available
447 this avoids a nasty yet stupid bug in rlogins */
448 #ifdef PTY_TTY_NAME_SPRINTF
451 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
452 #endif /* no PTY_TTY_NAME_SPRINTF */
454 if (access (pty_name
, 6) != 0)
457 #if !defined(IRIS) && !defined(__sgi)
463 #endif /* not UNIPLUS */
470 #endif /* HAVE_PTYS */
476 struct Lisp_Vector
*vec
;
477 register Lisp_Object val
, tem
, name1
;
478 register struct Lisp_Process
*p
;
482 vec
= allocate_vectorlike ((EMACS_INT
) VECSIZE (struct Lisp_Process
));
483 for (i
= 0; i
< VECSIZE (struct Lisp_Process
); i
++)
484 vec
->contents
[i
] = Qnil
;
485 vec
->size
= VECSIZE (struct Lisp_Process
);
486 p
= (struct Lisp_Process
*)vec
;
488 XSETINT (p
->infd
, -1);
489 XSETINT (p
->outfd
, -1);
490 XSETFASTINT (p
->pid
, 0);
491 XSETFASTINT (p
->tick
, 0);
492 XSETFASTINT (p
->update_tick
, 0);
493 p
->raw_status_low
= Qnil
;
494 p
->raw_status_high
= Qnil
;
496 p
->mark
= Fmake_marker ();
498 /* If name is already in use, modify it until it is unused. */
503 tem
= Fget_process (name1
);
504 if (NILP (tem
)) break;
505 sprintf (suffix
, "<%d>", i
);
506 name1
= concat2 (name
, build_string (suffix
));
510 XSETPROCESS (val
, p
);
511 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
515 remove_process (proc
)
516 register Lisp_Object proc
;
518 register Lisp_Object pair
;
520 pair
= Frassq (proc
, Vprocess_alist
);
521 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
523 deactivate_process (proc
);
526 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
527 "Return t if OBJECT is a process.")
531 return PROCESSP (object
) ? Qt
: Qnil
;
534 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
535 "Return the process named NAME, or nil if there is none.")
537 register Lisp_Object name
;
541 CHECK_STRING (name
, 0);
542 return Fcdr (Fassoc (name
, Vprocess_alist
));
545 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
546 "Return the (or, a) process associated with BUFFER.\n\
547 BUFFER may be a buffer or the name of one.")
549 register Lisp_Object buffer
;
551 register Lisp_Object buf
, tail
, proc
;
553 if (NILP (buffer
)) return Qnil
;
554 buf
= Fget_buffer (buffer
);
555 if (NILP (buf
)) return Qnil
;
557 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
559 proc
= Fcdr (Fcar (tail
));
560 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
566 /* This is how commands for the user decode process arguments. It
567 accepts a process, a process name, a buffer, a buffer name, or nil.
568 Buffers denote the first process in the buffer, and nil denotes the
573 register Lisp_Object name
;
575 register Lisp_Object proc
, obj
;
578 obj
= Fget_process (name
);
580 obj
= Fget_buffer (name
);
582 error ("Process %s does not exist", XSTRING (name
)->data
);
584 else if (NILP (name
))
585 obj
= Fcurrent_buffer ();
589 /* Now obj should be either a buffer object or a process object.
593 proc
= Fget_buffer_process (obj
);
595 error ("Buffer %s has no process", XSTRING (XBUFFER (obj
)->name
)->data
);
599 CHECK_PROCESS (obj
, 0);
605 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
606 "Delete PROCESS: kill it and forget about it immediately.\n\
607 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
608 nil, indicating the current buffer's process.")
610 register Lisp_Object process
;
612 process
= get_process (process
);
613 XPROCESS (process
)->raw_status_low
= Qnil
;
614 XPROCESS (process
)->raw_status_high
= Qnil
;
615 if (NETCONN_P (process
))
617 XPROCESS (process
)->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
618 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
620 else if (XINT (XPROCESS (process
)->infd
) >= 0)
622 Fkill_process (process
, Qnil
);
623 /* Do this now, since remove_process will make sigchld_handler do nothing. */
624 XPROCESS (process
)->status
625 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
626 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
629 remove_process (process
);
633 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
634 "Return the status of PROCESS: a symbol, one of these:\n\
635 run -- for a process that is running.\n\
636 stop -- for a process stopped but continuable.\n\
637 exit -- for a process that has exited.\n\
638 signal -- for a process that has got a fatal signal.\n\
639 open -- for a network stream connection that is open.\n\
640 closed -- for a network stream connection that is closed.\n\
641 nil -- if arg is a process name and no such process exists.\n\
642 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
643 nil, indicating the current buffer's process.")
645 register Lisp_Object process
;
647 register struct Lisp_Process
*p
;
648 register Lisp_Object status
;
650 if (STRINGP (process
))
651 process
= Fget_process (process
);
653 process
= get_process (process
);
658 p
= XPROCESS (process
);
659 if (!NILP (p
->raw_status_low
))
663 status
= XCONS (status
)->car
;
664 if (NETCONN_P (process
))
666 if (EQ (status
, Qrun
))
668 else if (EQ (status
, Qexit
))
674 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
676 "Return the exit status of PROCESS or the signal number that killed it.\n\
677 If PROCESS has not yet exited or died, return 0.")
679 register Lisp_Object process
;
681 CHECK_PROCESS (process
, 0);
682 if (!NILP (XPROCESS (process
)->raw_status_low
))
683 update_status (XPROCESS (process
));
684 if (CONSP (XPROCESS (process
)->status
))
685 return XCONS (XCONS (XPROCESS (process
)->status
)->cdr
)->car
;
686 return make_number (0);
689 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
690 "Return the process id of PROCESS.\n\
691 This is the pid of the Unix process which PROCESS uses or talks to.\n\
692 For a network connection, this value is nil.")
694 register Lisp_Object process
;
696 CHECK_PROCESS (process
, 0);
697 return XPROCESS (process
)->pid
;
700 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
701 "Return the name of PROCESS, as a string.\n\
702 This is the name of the program invoked in PROCESS,\n\
703 possibly modified to make it unique among process names.")
705 register Lisp_Object process
;
707 CHECK_PROCESS (process
, 0);
708 return XPROCESS (process
)->name
;
711 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
712 "Return the command that was executed to start PROCESS.\n\
713 This is a list of strings, the first string being the program executed\n\
714 and the rest of the strings being the arguments given to it.\n\
715 For a non-child channel, this is nil.")
717 register Lisp_Object process
;
719 CHECK_PROCESS (process
, 0);
720 return XPROCESS (process
)->command
;
723 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
724 "Return the name of the terminal PROCESS uses, or nil if none.\n\
725 This is the terminal that the process itself reads and writes on,\n\
726 not the name of the pty that Emacs uses to talk with that terminal.")
728 register Lisp_Object process
;
730 CHECK_PROCESS (process
, 0);
731 return XPROCESS (process
)->tty_name
;
734 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
736 "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).")
738 register Lisp_Object process
, buffer
;
740 CHECK_PROCESS (process
, 0);
742 CHECK_BUFFER (buffer
, 1);
743 XPROCESS (process
)->buffer
= buffer
;
747 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
749 "Return the buffer PROCESS is associated with.\n\
750 Output from PROCESS is inserted in this buffer\n\
751 unless PROCESS has a filter.")
753 register Lisp_Object process
;
755 CHECK_PROCESS (process
, 0);
756 return XPROCESS (process
)->buffer
;
759 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
761 "Return the marker for the end of the last output from PROCESS.")
763 register Lisp_Object process
;
765 CHECK_PROCESS (process
, 0);
766 return XPROCESS (process
)->mark
;
769 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
771 "Give PROCESS the filter function FILTER; nil means no filter.\n\
772 t means stop accepting output from the process.\n\
773 When a process has a filter, each time it does output\n\
774 the entire string of output is passed to the filter.\n\
775 The filter gets two arguments: the process and the string of output.\n\
776 If the process has a filter, its buffer is not used for output.")
778 register Lisp_Object process
, filter
;
780 CHECK_PROCESS (process
, 0);
783 FD_CLR (XINT (XPROCESS (process
)->infd
), &input_wait_mask
);
784 FD_CLR (XINT (XPROCESS (process
)->infd
), &non_keyboard_wait_mask
);
786 else if (EQ (XPROCESS (process
)->filter
, Qt
))
788 FD_SET (XINT (XPROCESS (process
)->infd
), &input_wait_mask
);
789 FD_SET (XINT (XPROCESS (process
)->infd
), &non_keyboard_wait_mask
);
791 XPROCESS (process
)->filter
= filter
;
795 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
797 "Returns the filter function of PROCESS; nil if none.\n\
798 See `set-process-filter' for more info on filter functions.")
800 register Lisp_Object process
;
802 CHECK_PROCESS (process
, 0);
803 return XPROCESS (process
)->filter
;
806 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
808 "Give PROCESS the sentinel SENTINEL; nil for none.\n\
809 The sentinel is called as a function when the process changes state.\n\
810 It gets two arguments: the process, and a string describing the change.")
812 register Lisp_Object process
, sentinel
;
814 CHECK_PROCESS (process
, 0);
815 XPROCESS (process
)->sentinel
= sentinel
;
819 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
821 "Return the sentinel of PROCESS; nil if none.\n\
822 See `set-process-sentinel' for more info on sentinels.")
824 register Lisp_Object process
;
826 CHECK_PROCESS (process
, 0);
827 return XPROCESS (process
)->sentinel
;
830 DEFUN ("set-process-window-size", Fset_process_window_size
,
831 Sset_process_window_size
, 3, 3, 0,
832 "Tell PROCESS that it has logical window size HEIGHT and WIDTH.")
833 (process
, height
, width
)
834 register Lisp_Object process
, height
, width
;
836 CHECK_PROCESS (process
, 0);
837 CHECK_NATNUM (height
, 0);
838 CHECK_NATNUM (width
, 0);
839 if (set_window_size (XINT (XPROCESS (process
)->infd
),
840 XINT (height
), XINT(width
)) <= 0)
846 DEFUN ("process-kill-without-query", Fprocess_kill_without_query
,
847 Sprocess_kill_without_query
, 1, 2, 0,
848 "Say no query needed if PROCESS is running when Emacs is exited.\n\
849 Optional second argument if non-nil says to require a query.\n\
850 Value is t if a query was formerly required.")
852 register Lisp_Object process
, value
;
856 CHECK_PROCESS (process
, 0);
857 tem
= XPROCESS (process
)->kill_without_query
;
858 XPROCESS (process
)->kill_without_query
= Fnull (value
);
863 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
865 "Return the contact info of PROCESS; t for a real child.\n\
866 For a net connection, the value is a cons cell of the form (HOST SERVICE).")
868 register Lisp_Object process
;
870 CHECK_PROCESS (process
, 0);
871 return XPROCESS (process
)->childp
;
874 #if 0 /* Turned off because we don't currently record this info
875 in the process. Perhaps add it. */
876 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
877 "Return the connection type of `PROCESS'.\n\
878 The value is `nil' for a pipe,\n\
879 `t' or `pty' for a pty, or `stream' for a socket connection.")
883 return XPROCESS (process
)->type
;
890 register Lisp_Object tail
, tem
;
891 Lisp_Object proc
, minspace
, tem1
;
892 register struct buffer
*old
= current_buffer
;
893 register struct Lisp_Process
*p
;
897 XSETFASTINT (minspace
, 1);
899 set_buffer_internal (XBUFFER (Vstandard_output
));
900 Fbuffer_disable_undo (Vstandard_output
);
902 current_buffer
->truncate_lines
= Qt
;
905 Proc Status Buffer Tty Command\n\
906 ---- ------ ------ --- -------\n", -1);
908 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
912 proc
= Fcdr (Fcar (tail
));
914 if (NILP (p
->childp
))
917 Finsert (1, &p
->name
);
918 Findent_to (make_number (13), minspace
);
920 if (!NILP (p
->raw_status_low
))
923 if (CONSP (p
->status
))
924 symbol
= XCONS (p
->status
)->car
;
927 if (EQ (symbol
, Qsignal
))
930 tem
= Fcar (Fcdr (p
->status
));
932 if (XINT (tem
) < NSIG
)
933 write_string (sys_errlist
[XINT (tem
)], -1);
936 Fprinc (symbol
, Qnil
);
938 else if (NETCONN_P (proc
))
940 if (EQ (symbol
, Qrun
))
941 write_string ("open", -1);
942 else if (EQ (symbol
, Qexit
))
943 write_string ("closed", -1);
945 Fprinc (symbol
, Qnil
);
948 Fprinc (symbol
, Qnil
);
950 if (EQ (symbol
, Qexit
))
953 tem
= Fcar (Fcdr (p
->status
));
956 sprintf (tembuf
, " %d", (int) XFASTINT (tem
));
957 write_string (tembuf
, -1);
961 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
962 remove_process (proc
);
964 Findent_to (make_number (22), minspace
);
965 if (NILP (p
->buffer
))
966 insert_string ("(none)");
967 else if (NILP (XBUFFER (p
->buffer
)->name
))
968 insert_string ("(Killed)");
970 Finsert (1, &XBUFFER (p
->buffer
)->name
);
972 Findent_to (make_number (37), minspace
);
974 if (STRINGP (p
->tty_name
))
975 Finsert (1, &p
->tty_name
);
977 insert_string ("(none)");
979 Findent_to (make_number (49), minspace
);
981 if (NETCONN_P (proc
))
983 sprintf (tembuf
, "(network stream connection to %s)\n",
984 XSTRING (XCONS (p
->childp
)->car
)->data
);
985 insert_string (tembuf
);
999 insert_string ("\n");
1005 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 0, "",
1006 "Display a list of all processes.\n\
1007 \(Any processes listed as Exited or Signaled are actually eliminated\n\
1008 after the listing is made.)")
1011 internal_with_output_to_temp_buffer ("*Process List*",
1012 list_processes_1
, Qnil
);
1016 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1017 "Return a list of all processes.")
1020 return Fmapcar (Qcdr
, Vprocess_alist
);
1023 /* Starting asynchronous inferior processes. */
1025 static Lisp_Object
start_process_unwind ();
1027 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1028 "Start a program in a subprocess. Return the process object for it.\n\
1029 Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\
1030 NAME is name for process. It is modified if necessary to make it unique.\n\
1031 BUFFER is the buffer or (buffer-name) to associate with the process.\n\
1032 Process output goes at end of that buffer, unless you specify\n\
1033 an output stream or filter function to handle the output.\n\
1034 BUFFER may be also nil, meaning that this process is not associated\n\
1036 Third arg is program file name. It is searched for as in the shell.\n\
1037 Remaining arguments are strings to give program as arguments.")
1040 register Lisp_Object
*args
;
1042 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1044 register unsigned char *new_argv
;
1047 register unsigned char **new_argv
;
1050 int count
= specpdl_ptr
- specpdl
;
1054 buffer
= Fget_buffer_create (buffer
);
1056 /* Make sure that the child will be able to chdir to the current
1057 buffer's current directory, or its unhandled equivalent. We
1058 can't just have the child check for an error when it does the
1059 chdir, since it's in a vfork.
1061 We have to GCPRO around this because Fexpand_file_name and
1062 Funhandled_file_name_directory might call a file name handling
1063 function. The argument list is protected by the caller, so all
1064 we really have to worry about is buffer. */
1066 struct gcpro gcpro1
, gcpro2
;
1068 current_dir
= current_buffer
->directory
;
1070 GCPRO2 (buffer
, current_dir
);
1073 = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir
),
1075 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1076 report_file_error ("Setting current directory",
1077 Fcons (current_buffer
->directory
, Qnil
));
1083 CHECK_STRING (name
, 0);
1087 CHECK_STRING (program
, 2);
1090 /* Make a one member argv with all args concatenated
1091 together separated by a blank. */
1092 len
= XSTRING (program
)->size
+ 2;
1093 for (i
= 3; i
< nargs
; i
++)
1096 CHECK_STRING (tem
, i
);
1097 len
+= XSTRING (tem
)->size
+ 1; /* count the blank */
1099 new_argv
= (unsigned char *) alloca (len
);
1100 strcpy (new_argv
, XSTRING (program
)->data
);
1101 for (i
= 3; i
< nargs
; i
++)
1104 CHECK_STRING (tem
, i
);
1105 strcat (new_argv
, " ");
1106 strcat (new_argv
, XSTRING (tem
)->data
);
1108 /* Need to add code here to check for program existence on VMS */
1111 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1113 /* If program file name is not absolute, search our path for it */
1114 if (!IS_DIRECTORY_SEP (XSTRING (program
)->data
[0])
1115 && !(XSTRING (program
)->size
> 1
1116 && IS_DEVICE_SEP (XSTRING (program
)->data
[1])))
1118 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1121 GCPRO4 (name
, program
, buffer
, current_dir
);
1122 openp (Vexec_path
, program
, EXEC_SUFFIXES
, &tem
, 1);
1125 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1126 tem
= Fexpand_file_name (tem
, Qnil
);
1127 new_argv
[0] = XSTRING (tem
)->data
;
1131 if (!NILP (Ffile_directory_p (program
)))
1132 error ("Specified program for new process is a directory");
1134 new_argv
[0] = XSTRING (program
)->data
;
1137 for (i
= 3; i
< nargs
; i
++)
1140 CHECK_STRING (tem
, i
);
1141 new_argv
[i
- 2] = XSTRING (tem
)->data
;
1143 new_argv
[i
- 2] = 0;
1144 #endif /* not VMS */
1146 proc
= make_process (name
);
1147 /* If an error occurs and we can't start the process, we want to
1148 remove it from the process list. This means that each error
1149 check in create_process doesn't need to call remove_process
1150 itself; it's all taken care of here. */
1151 record_unwind_protect (start_process_unwind
, proc
);
1153 XPROCESS (proc
)->childp
= Qt
;
1154 XPROCESS (proc
)->command_channel_p
= Qnil
;
1155 XPROCESS (proc
)->buffer
= buffer
;
1156 XPROCESS (proc
)->sentinel
= Qnil
;
1157 XPROCESS (proc
)->filter
= Qnil
;
1158 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1160 /* Make the process marker point into the process buffer (if any). */
1162 Fset_marker (XPROCESS (proc
)->mark
,
1163 make_number (BUF_ZV (XBUFFER (buffer
))), buffer
);
1165 if (!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
)
1166 || NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
))
1168 XPROCESS (proc
)->decode_coding_system
= Qnil
;
1169 XPROCESS (proc
)->encode_coding_system
= Qnil
;
1173 /* Setup coding systems for communicating with the process. */
1174 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1175 Lisp_Object coding_systems
= Qt
;
1176 Lisp_Object val
, *args2
;
1177 struct gcpro gcpro1
;
1179 if (!NILP (Vcoding_system_for_read
))
1180 val
= Vcoding_system_for_read
;
1181 else if (NILP (current_buffer
->enable_multibyte_characters
))
1185 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1186 args2
[0] = Qstart_process
;
1187 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1189 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1191 if (CONSP (coding_systems
))
1192 val
= XCONS (coding_systems
)->car
;
1193 else if (CONSP (Vdefault_process_coding_system
))
1194 val
= XCONS (Vdefault_process_coding_system
)->car
;
1198 XPROCESS (proc
)->decode_coding_system
= val
;
1200 if (!NILP (Vcoding_system_for_write
))
1201 val
= Vcoding_system_for_write
;
1202 else if (NILP (current_buffer
->enable_multibyte_characters
))
1206 if (EQ (coding_systems
, Qt
))
1208 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof args2
);
1209 args2
[0] = Qstart_process
;
1210 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1213 Ffind_operation_coding_system (nargs
+ 1, args2
);
1216 if (CONSP (coding_systems
))
1217 val
= XCONS (coding_systems
)->cdr
;
1218 else if (CONSP (Vdefault_process_coding_system
))
1219 val
= XCONS (Vdefault_process_coding_system
)->cdr
;
1223 XPROCESS (proc
)->encode_coding_system
= val
;
1226 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
1227 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
1229 create_process (proc
, (char **) new_argv
, current_dir
);
1231 return unbind_to (count
, proc
);
1234 /* This function is the unwind_protect form for Fstart_process. If
1235 PROC doesn't have its pid set, then we know someone has signaled
1236 an error and the process wasn't started successfully, so we should
1237 remove it from the process list. */
1239 start_process_unwind (proc
)
1242 if (!PROCESSP (proc
))
1245 /* Was PROC started successfully? */
1246 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1247 remove_process (proc
);
1254 create_process_1 (signo
)
1257 #if defined (USG) && !defined (POSIX_SIGNALS)
1258 /* USG systems forget handlers when they are used;
1259 must reestablish each time */
1260 signal (signo
, create_process_1
);
1264 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1267 /* Mimic blocking of signals on system V, which doesn't really have it. */
1269 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1270 int sigchld_deferred
;
1273 create_process_sigchld ()
1275 signal (SIGCHLD
, create_process_sigchld
);
1277 sigchld_deferred
= 1;
1283 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1285 create_process (process
, new_argv
, current_dir
)
1286 Lisp_Object process
;
1288 Lisp_Object current_dir
;
1290 int pid
, inchannel
, outchannel
;
1292 #ifdef POSIX_SIGNALS
1295 struct sigaction sigint_action
;
1296 struct sigaction sigquit_action
;
1298 struct sigaction sighup_action
;
1300 #else /* !POSIX_SIGNALS */
1302 SIGTYPE (*sigchld
)();
1304 #endif /* !POSIX_SIGNALS */
1305 /* Use volatile to protect variables from being clobbered by longjmp. */
1306 volatile int forkin
, forkout
;
1307 volatile int pty_flag
= 0;
1308 extern char **environ
;
1310 inchannel
= outchannel
= -1;
1313 if (!NILP (Vprocess_connection_type
))
1314 outchannel
= inchannel
= allocate_pty ();
1319 /* On USG systems it does not work to open the pty's tty here
1320 and then close and reopen it in the child. */
1322 /* Don't let this terminal become our controlling terminal
1323 (in case we don't have one). */
1324 forkout
= forkin
= open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1326 forkout
= forkin
= open (pty_name
, O_RDWR
, 0);
1329 report_file_error ("Opening pty", Qnil
);
1331 forkin
= forkout
= -1;
1332 #endif /* not USG */
1336 #endif /* HAVE_PTYS */
1339 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1340 report_file_error ("Opening socketpair", Qnil
);
1341 outchannel
= inchannel
= sv
[0];
1342 forkout
= forkin
= sv
[1];
1344 #else /* not SKTPAIR */
1353 #endif /* not SKTPAIR */
1356 /* Replaced by close_process_descs */
1357 set_exclusive_use (inchannel
);
1358 set_exclusive_use (outchannel
);
1361 /* Stride people say it's a mystery why this is needed
1362 as well as the O_NDELAY, but that it fails without this. */
1363 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1366 ioctl (inchannel
, FIONBIO
, &one
);
1371 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1372 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1375 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1376 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1380 /* Record this as an active process, with its channels.
1381 As a result, child_setup will close Emacs's side of the pipes. */
1382 chan_process
[inchannel
] = process
;
1383 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1384 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1385 /* Record the tty descriptor used in the subprocess. */
1387 XPROCESS (process
)->subtty
= Qnil
;
1389 XSETFASTINT (XPROCESS (process
)->subtty
, forkin
);
1390 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1391 XPROCESS (process
)->status
= Qrun
;
1392 if (!proc_decode_coding_system
[inchannel
])
1393 proc_decode_coding_system
[inchannel
]
1394 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
1395 setup_coding_system (XPROCESS (process
)->decode_coding_system
,
1396 proc_decode_coding_system
[inchannel
]);
1397 if (!proc_encode_coding_system
[outchannel
])
1398 proc_encode_coding_system
[outchannel
]
1399 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
1400 setup_coding_system (XPROCESS (process
)->encode_coding_system
,
1401 proc_encode_coding_system
[outchannel
]);
1403 if (CODING_REQUIRE_ENCODING (proc_encode_coding_system
[outchannel
]))
1405 /* Here we encode arguments by the coding system used for
1406 sending data to the process. We don't support using
1407 different coding systems for encoding arguments and for
1408 encoding data sent to the process. */
1409 struct gcpro gcpro1
;
1411 struct coding_system
*coding
= proc_encode_coding_system
[outchannel
];
1413 coding
->last_block
= 1;
1415 while (new_argv
[i
] != 0)
1417 int len
= strlen (new_argv
[i
]);
1418 int size
= encoding_buffer_size (coding
, len
);
1419 unsigned char *buf
= (unsigned char *) alloca (size
);
1422 produced
= encode_coding (coding
, new_argv
[i
], buf
, len
, size
, &dmy
);
1424 /* We don't have to free new_argv[i] because it points to a
1425 Lisp string given as an argument to `start-process'. */
1426 new_argv
[i
++] = buf
;
1429 coding
->last_block
= 0;
1432 /* Delay interrupts until we have a chance to store
1433 the new fork's pid in its process structure */
1434 #ifdef POSIX_SIGNALS
1435 sigemptyset (&blocked
);
1437 sigaddset (&blocked
, SIGCHLD
);
1440 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1441 this sets the parent's signal handlers as well as the child's.
1442 So delay all interrupts whose handlers the child might munge,
1443 and record the current handlers so they can be restored later. */
1444 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1445 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1447 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1449 #endif /* HAVE_VFORK */
1450 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1451 #else /* !POSIX_SIGNALS */
1455 #else /* not BSD4_1 */
1456 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1457 sigsetmask (sigmask (SIGCHLD
));
1458 #else /* ordinary USG */
1460 sigchld_deferred
= 0;
1461 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1463 #endif /* ordinary USG */
1464 #endif /* not BSD4_1 */
1465 #endif /* SIGCHLD */
1466 #endif /* !POSIX_SIGNALS */
1468 FD_SET (inchannel
, &input_wait_mask
);
1469 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1470 if (inchannel
> max_process_desc
)
1471 max_process_desc
= inchannel
;
1473 /* Until we store the proper pid, enable sigchld_handler
1474 to recognize an unknown pid as standing for this process.
1475 It is very important not to let this `marker' value stay
1476 in the table after this function has returned; if it does
1477 it might cause call-process to hang and subsequent asynchronous
1478 processes to get their return values scrambled. */
1479 XSETINT (XPROCESS (process
)->pid
, -1);
1484 /* child_setup must clobber environ on systems with true vfork.
1485 Protect it from permanent change. */
1486 char **save_environ
= environ
;
1489 = Fencode_coding_string (current_dir
, Vfile_name_coding_system
, Qt
);
1494 #endif /* not WINDOWSNT */
1496 int xforkin
= forkin
;
1497 int xforkout
= forkout
;
1499 #if 0 /* This was probably a mistake--it duplicates code later on,
1500 but fails to handle all the cases. */
1501 /* Make sure SIGCHLD is not blocked in the child. */
1502 sigsetmask (SIGEMPTYMASK
);
1505 /* Make the pty be the controlling terminal of the process. */
1507 /* First, disconnect its current controlling terminal. */
1509 /* We tried doing setsid only if pty_flag, but it caused
1510 process_set_signal to fail on SGI when using a pipe. */
1512 /* Make the pty's terminal the controlling terminal. */
1516 /* We ignore the return value
1517 because faith@cs.unc.edu says that is necessary on Linux. */
1518 ioctl (xforkin
, TIOCSCTTY
, 0);
1521 #else /* not HAVE_SETSID */
1523 /* It's very important to call setpgrp here and no time
1524 afterwards. Otherwise, we lose our controlling tty which
1525 is set when we open the pty. */
1528 #endif /* not HAVE_SETSID */
1529 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1530 if (pty_flag
&& xforkin
>= 0)
1533 tcgetattr (xforkin
, &t
);
1535 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1536 write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1539 #if defined (NTTYDISC) && defined (TIOCSETD)
1540 if (pty_flag
&& xforkin
>= 0)
1542 /* Use new line discipline. */
1543 int ldisc
= NTTYDISC
;
1544 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1549 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1550 can do TIOCSPGRP only to the process's controlling tty. */
1553 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1554 I can't test it since I don't have 4.3. */
1555 int j
= open ("/dev/tty", O_RDWR
, 0);
1556 ioctl (j
, TIOCNOTTY
, 0);
1559 /* In order to get a controlling terminal on some versions
1560 of BSD, it is necessary to put the process in pgrp 0
1561 before it opens the terminal. */
1569 #endif /* TIOCNOTTY */
1571 #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY)
1572 /*** There is a suggestion that this ought to be a
1573 conditional on TIOCSPGRP,
1574 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1575 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1576 that system does seem to need this code, even though
1577 both HAVE_SETSID and TIOCSCTTY are defined. */
1578 /* Now close the pty (if we had it open) and reopen it.
1579 This makes the pty the controlling terminal of the subprocess. */
1582 #ifdef SET_CHILD_PTY_PGRP
1583 int pgrp
= getpid ();
1586 /* I wonder if close (open (pty_name, ...)) would work? */
1589 xforkout
= xforkin
= open (pty_name
, O_RDWR
, 0);
1593 write (1, "Couldn't open the pty terminal ", 31);
1594 write (1, pty_name
, strlen (pty_name
));
1599 #ifdef SET_CHILD_PTY_PGRP
1600 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1601 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1604 #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */
1606 #ifdef SETUP_SLAVE_PTY
1611 #endif /* SETUP_SLAVE_PTY */
1613 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1614 Now reenable it in the child, so it will die when we want it to. */
1616 signal (SIGHUP
, SIG_DFL
);
1618 #endif /* HAVE_PTYS */
1620 signal (SIGINT
, SIG_DFL
);
1621 signal (SIGQUIT
, SIG_DFL
);
1623 /* Stop blocking signals in the child. */
1624 #ifdef POSIX_SIGNALS
1625 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1626 #else /* !POSIX_SIGNALS */
1630 #else /* not BSD4_1 */
1631 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1632 sigsetmask (SIGEMPTYMASK
);
1633 #else /* ordinary USG */
1635 signal (SIGCHLD
, sigchld
);
1637 #endif /* ordinary USG */
1638 #endif /* not BSD4_1 */
1639 #endif /* SIGCHLD */
1640 #endif /* !POSIX_SIGNALS */
1643 child_setup_tty (xforkout
);
1645 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1646 new_argv
, 1, current_dir
);
1647 #else /* not WINDOWSNT */
1648 child_setup (xforkin
, xforkout
, xforkout
,
1649 new_argv
, 1, current_dir
);
1650 #endif /* not WINDOWSNT */
1652 environ
= save_environ
;
1657 /* This runs in the Emacs process. */
1662 if (forkin
!= forkout
&& forkout
>= 0)
1667 /* vfork succeeded. */
1668 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
1671 register_child (pid
, inchannel
);
1672 #endif /* WINDOWSNT */
1674 /* If the subfork execv fails, and it exits,
1675 this close hangs. I don't know why.
1676 So have an interrupt jar it loose. */
1678 signal (SIGALRM
, create_process_1
);
1680 XPROCESS (process
)->subtty
= Qnil
;
1685 if (forkin
!= forkout
&& forkout
>= 0)
1690 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1693 XPROCESS (process
)->tty_name
= Qnil
;
1696 /* Restore the signal state whether vfork succeeded or not.
1697 (We will signal an error, below, if it failed.) */
1698 #ifdef POSIX_SIGNALS
1700 /* Restore the parent's signal handlers. */
1701 sigaction (SIGINT
, &sigint_action
, 0);
1702 sigaction (SIGQUIT
, &sigquit_action
, 0);
1704 sigaction (SIGHUP
, &sighup_action
, 0);
1706 #endif /* HAVE_VFORK */
1707 /* Stop blocking signals in the parent. */
1708 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1709 #else /* !POSIX_SIGNALS */
1713 #else /* not BSD4_1 */
1714 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1715 sigsetmask (SIGEMPTYMASK
);
1716 #else /* ordinary USG */
1718 signal (SIGCHLD
, sigchld
);
1719 /* Now really handle any of these signals
1720 that came in during this function. */
1721 if (sigchld_deferred
)
1722 kill (getpid (), SIGCHLD
);
1724 #endif /* ordinary USG */
1725 #endif /* not BSD4_1 */
1726 #endif /* SIGCHLD */
1727 #endif /* !POSIX_SIGNALS */
1729 /* Now generate the error if vfork failed. */
1731 report_file_error ("Doing vfork", Qnil
);
1733 #endif /* not VMS */
1737 /* open a TCP network connection to a given HOST/SERVICE. Treated
1738 exactly like a normal process when reading and writing. Only
1739 differences are in status display and process deletion. A network
1740 connection has no PID; you cannot signal it. All you can do is
1741 deactivate and close it via delete-process */
1743 DEFUN ("open-network-stream", Fopen_network_stream
, Sopen_network_stream
,
1745 "Open a TCP connection for a service to a host.\n\
1746 Returns a subprocess-object to represent the connection.\n\
1747 Input and output work as for subprocesses; `delete-process' closes it.\n\
1748 Args are NAME BUFFER HOST SERVICE.\n\
1749 NAME is name for process. It is modified if necessary to make it unique.\n\
1750 BUFFER is the buffer (or buffer-name) to associate with the process.\n\
1751 Process output goes at end of that buffer, unless you specify\n\
1752 an output stream or filter function to handle the output.\n\
1753 BUFFER may be also nil, meaning that this process is not associated\n\
1755 Third arg is name of the host to connect to, or its IP address.\n\
1756 Fourth arg SERVICE is name of the service desired, or an integer\n\
1757 specifying a port number to connect to.")
1758 (name
, buffer
, host
, service
)
1759 Lisp_Object name
, buffer
, host
, service
;
1763 struct sockaddr_in address
;
1764 struct servent
*svc_info
;
1765 struct hostent
*host_info_ptr
, host_info
;
1766 char *(addr_list
[2]);
1767 IN_ADDR numeric_addr
;
1771 struct hostent host_info_fixed
;
1772 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1774 int count
= specpdl_ptr
- specpdl
;
1777 /* Ensure socket support is loaded if available. */
1778 init_winsock (TRUE
);
1781 GCPRO4 (name
, buffer
, host
, service
);
1782 CHECK_STRING (name
, 0);
1783 CHECK_STRING (host
, 0);
1784 if (INTEGERP (service
))
1785 port
= htons ((unsigned short) XINT (service
));
1788 CHECK_STRING (service
, 0);
1789 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
1791 error ("Unknown service \"%s\"", XSTRING (service
)->data
);
1792 port
= svc_info
->s_port
;
1795 /* Slow down polling to every ten seconds.
1796 Some kernels have a bug which causes retrying connect to fail
1797 after a connect. Polling can interfere with gethostbyname too. */
1798 #ifdef POLL_FOR_INPUT
1799 bind_polling_period (10);
1810 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
1813 if (! (host_info_ptr
== 0 && h_errno
== TRY_AGAIN
))
1816 Fsleep_for (make_number (1), Qnil
);
1818 if (host_info_ptr
== 0)
1819 /* Attempt to interpret host as numeric inet address */
1821 numeric_addr
= inet_addr ((char *) XSTRING (host
)->data
);
1822 if (NUMERIC_ADDR_ERROR
)
1823 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
1825 host_info_ptr
= &host_info
;
1826 host_info
.h_name
= 0;
1827 host_info
.h_aliases
= 0;
1828 host_info
.h_addrtype
= AF_INET
;
1830 /* Older machines have only one address slot called h_addr.
1831 Newer machines have h_addr_list, but #define h_addr to
1832 be its first element. */
1833 host_info
.h_addr_list
= &(addr_list
[0]);
1835 host_info
.h_addr
= (char*)(&numeric_addr
);
1837 /* numeric_addr isn't null-terminated; it has fixed length. */
1838 host_info
.h_length
= sizeof (numeric_addr
);
1841 bzero (&address
, sizeof address
);
1842 bcopy (host_info_ptr
->h_addr
, (char *) &address
.sin_addr
,
1843 host_info_ptr
->h_length
);
1844 address
.sin_family
= host_info_ptr
->h_addrtype
;
1845 address
.sin_port
= port
;
1847 s
= socket (host_info_ptr
->h_addrtype
, SOCK_STREAM
, 0);
1849 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1851 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
1852 when connect is interrupted. So let's not let it get interrupted.
1853 Note we do not turn off polling, because polling is only used
1854 when not interrupt_input, and thus not normally used on the systems
1855 which have this bug. On systems which use polling, there's no way
1856 to quit if polling is turned off. */
1857 if (interrupt_input
)
1865 if (connect (s
, (struct sockaddr
*) &address
, sizeof address
) == -1
1866 && errno
!= EISCONN
)
1874 if (errno
== EADDRINUSE
&& retry
< 20)
1876 /* A delay here is needed on some FreeBSD systems,
1877 and it is harmless, since this retrying takes time anyway
1878 and should be infrequent. */
1879 Fsleep_for (make_number (1), Qnil
);
1886 if (interrupt_input
)
1890 report_file_error ("connection failed",
1891 Fcons (host
, Fcons (name
, Qnil
)));
1896 #ifdef POLL_FOR_INPUT
1897 unbind_to (count
, Qnil
);
1900 if (interrupt_input
)
1904 s
= connect_server (0);
1906 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1907 send_command (s
, C_PORT
, 0, "%s:%d", XSTRING (host
)->data
, ntohs (port
));
1908 send_command (s
, C_DUMB
, 1, 0);
1915 buffer
= Fget_buffer_create (buffer
);
1916 proc
= make_process (name
);
1918 chan_process
[inch
] = proc
;
1921 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
1924 fcntl (inch
, F_SETFL
, O_NDELAY
);
1928 XPROCESS (proc
)->childp
= Fcons (host
, Fcons (service
, Qnil
));
1929 XPROCESS (proc
)->command_channel_p
= Qnil
;
1930 XPROCESS (proc
)->buffer
= buffer
;
1931 XPROCESS (proc
)->sentinel
= Qnil
;
1932 XPROCESS (proc
)->filter
= Qnil
;
1933 XPROCESS (proc
)->command
= Qnil
;
1934 XPROCESS (proc
)->pid
= Qnil
;
1935 XSETINT (XPROCESS (proc
)->infd
, inch
);
1936 XSETINT (XPROCESS (proc
)->outfd
, outch
);
1937 XPROCESS (proc
)->status
= Qrun
;
1938 FD_SET (inch
, &input_wait_mask
);
1939 FD_SET (inch
, &non_keyboard_wait_mask
);
1940 if (inch
> max_process_desc
)
1941 max_process_desc
= inch
;
1943 if (!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
)
1944 || NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
))
1946 XPROCESS (proc
)->decode_coding_system
= Qnil
;
1947 XPROCESS (proc
)->encode_coding_system
= Qnil
;
1951 /* Setup coding systems for communicating with the network stream. */
1952 struct gcpro gcpro1
;
1953 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1954 Lisp_Object coding_systems
= Qt
;
1955 Lisp_Object args
[5], val
;
1957 if (!NILP (Vcoding_system_for_read
))
1958 val
= Vcoding_system_for_read
;
1959 else if (NILP (current_buffer
->enable_multibyte_characters
))
1960 /* We dare not decode end-of-line format by setting VAL to
1961 Qemacs_mule, because the existing Emacs Lisp libraries
1962 assume that they receive bare code including a sequene of
1967 args
[0] = Qopen_network_stream
, args
[1] = name
,
1968 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
1970 coding_systems
= Ffind_operation_coding_system (5, args
);
1972 if (CONSP (coding_systems
))
1973 val
= XCONS (coding_systems
)->car
;
1974 else if (CONSP (Vdefault_process_coding_system
))
1975 val
= XCONS (Vdefault_process_coding_system
)->car
;
1979 XPROCESS (proc
)->decode_coding_system
= val
;
1981 if (!NILP (Vcoding_system_for_write
))
1982 val
= Vcoding_system_for_write
;
1983 else if (NILP (current_buffer
->enable_multibyte_characters
))
1987 if (EQ (coding_systems
, Qt
))
1989 args
[0] = Qopen_network_stream
, args
[1] = name
,
1990 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
1992 coding_systems
= Ffind_operation_coding_system (5, args
);
1995 if (CONSP (coding_systems
))
1996 val
= XCONS (coding_systems
)->cdr
;
1997 else if (CONSP (Vdefault_process_coding_system
))
1998 val
= XCONS (Vdefault_process_coding_system
)->cdr
;
2002 XPROCESS (proc
)->encode_coding_system
= val
;
2005 if (!proc_decode_coding_system
[inch
])
2006 proc_decode_coding_system
[inch
]
2007 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
2008 setup_coding_system (XPROCESS (proc
)->decode_coding_system
,
2009 proc_decode_coding_system
[inch
]);
2010 if (!proc_encode_coding_system
[outch
])
2011 proc_encode_coding_system
[outch
]
2012 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
2013 setup_coding_system (XPROCESS (proc
)->encode_coding_system
,
2014 proc_encode_coding_system
[outch
]);
2016 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
2017 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
2022 #endif /* HAVE_SOCKETS */
2025 deactivate_process (proc
)
2028 register int inchannel
, outchannel
;
2029 register struct Lisp_Process
*p
= XPROCESS (proc
);
2031 inchannel
= XINT (p
->infd
);
2032 outchannel
= XINT (p
->outfd
);
2036 /* Beware SIGCHLD hereabouts. */
2037 flush_pending_output (inchannel
);
2040 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
2041 sys$
dassgn (outchannel
);
2042 vs
= get_vms_process_pointer (p
->pid
);
2044 give_back_vms_process_stuff (vs
);
2048 if (outchannel
>= 0 && outchannel
!= inchannel
)
2052 XSETINT (p
->infd
, -1);
2053 XSETINT (p
->outfd
, -1);
2054 chan_process
[inchannel
] = Qnil
;
2055 FD_CLR (inchannel
, &input_wait_mask
);
2056 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
2057 if (inchannel
== max_process_desc
)
2060 /* We just closed the highest-numbered process input descriptor,
2061 so recompute the highest-numbered one now. */
2062 max_process_desc
= 0;
2063 for (i
= 0; i
< MAXDESC
; i
++)
2064 if (!NILP (chan_process
[i
]))
2065 max_process_desc
= i
;
2070 /* Close all descriptors currently in use for communication
2071 with subprocess. This is used in a newly-forked subprocess
2072 to get rid of irrelevant descriptors. */
2075 close_process_descs ()
2079 for (i
= 0; i
< MAXDESC
; i
++)
2081 Lisp_Object process
;
2082 process
= chan_process
[i
];
2083 if (!NILP (process
))
2085 int in
= XINT (XPROCESS (process
)->infd
);
2086 int out
= XINT (XPROCESS (process
)->outfd
);
2089 if (out
>= 0 && in
!= out
)
2096 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
2098 "Allow any pending output from subprocesses to be read by Emacs.\n\
2099 It is read into the process' buffers or given to their filter functions.\n\
2100 Non-nil arg PROCESS means do not return until some output has been received\n\
2102 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
2103 seconds and microseconds to wait; return after that much time whether\n\
2104 or not there is input.\n\
2105 Return non-nil iff we received any output before the timeout expired.")
2106 (process
, timeout
, timeout_msecs
)
2107 register Lisp_Object process
, timeout
, timeout_msecs
;
2112 if (! NILP (timeout_msecs
))
2114 CHECK_NUMBER (timeout_msecs
, 2);
2115 useconds
= XINT (timeout_msecs
);
2116 if (!INTEGERP (timeout
))
2117 XSETINT (timeout
, 0);
2120 int carry
= useconds
/ 1000000;
2122 XSETINT (timeout
, XINT (timeout
) + carry
);
2123 useconds
-= carry
* 1000000;
2125 /* I think this clause is necessary because C doesn't
2126 guarantee a particular rounding direction for negative
2130 XSETINT (timeout
, XINT (timeout
) - 1);
2131 useconds
+= 1000000;
2138 if (! NILP (timeout
))
2140 CHECK_NUMBER (timeout
, 1);
2141 seconds
= XINT (timeout
);
2142 if (seconds
< 0 || (seconds
== 0 && useconds
== 0))
2154 XSETFASTINT (process
, 0);
2157 (wait_reading_process_input (seconds
, useconds
, process
, 0)
2161 /* This variable is different from waiting_for_input in keyboard.c.
2162 It is used to communicate to a lisp process-filter/sentinel (via the
2163 function Fwaiting_for_user_input_p below) whether emacs was waiting
2164 for user-input when that process-filter was called.
2165 waiting_for_input cannot be used as that is by definition 0 when
2166 lisp code is being evalled.
2167 This is also used in record_asynch_buffer_change.
2168 For that purpose, this must be 0
2169 when not inside wait_reading_process_input. */
2170 static int waiting_for_user_input_p
;
2172 /* This is here so breakpoints can be put on it. */
2174 wait_reading_process_input_1 ()
2178 /* Read and dispose of subprocess output while waiting for timeout to
2179 elapse and/or keyboard input to be available.
2182 timeout in seconds, or
2183 zero for no limit, or
2184 -1 means gobble data immediately available but don't wait for any.
2187 an additional duration to wait, measured in microseconds.
2188 If this is nonzero and time_limit is 0, then the timeout
2189 consists of MICROSECS only.
2191 READ_KBD is a lisp value:
2192 0 to ignore keyboard input, or
2193 1 to return when input is available, or
2194 -1 meaning caller will actually read the input, so don't throw to
2195 the quit handler, or
2196 a cons cell, meaning wait until its car is non-nil
2197 (and gobble terminal input into the buffer if any arrives), or
2198 a process object, meaning wait until something arrives from that
2199 process. The return value is true iff we read some input from
2202 DO_DISPLAY != 0 means redisplay should be done to show subprocess
2203 output that arrives.
2205 If READ_KBD is a pointer to a struct Lisp_Process, then the
2206 function returns true iff we received input from that process
2207 before the timeout elapsed.
2208 Otherwise, return true iff we received input from any process. */
2210 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
2211 int time_limit
, microsecs
;
2212 Lisp_Object read_kbd
;
2215 register int channel
, nfds
, m
;
2216 static SELECT_TYPE Available
;
2219 EMACS_TIME timeout
, end_time
, garbage
;
2221 int wait_channel
= -1;
2222 struct Lisp_Process
*wait_proc
= 0;
2223 int got_some_input
= 0;
2224 Lisp_Object
*wait_for_cell
= 0;
2226 FD_ZERO (&Available
);
2228 /* If read_kbd is a process to watch, set wait_proc and wait_channel
2230 if (PROCESSP (read_kbd
))
2232 wait_proc
= XPROCESS (read_kbd
);
2233 wait_channel
= XINT (wait_proc
->infd
);
2234 XSETFASTINT (read_kbd
, 0);
2237 /* If waiting for non-nil in a cell, record where. */
2238 if (CONSP (read_kbd
))
2240 wait_for_cell
= &XCONS (read_kbd
)->car
;
2241 XSETFASTINT (read_kbd
, 0);
2244 waiting_for_user_input_p
= XINT (read_kbd
);
2246 /* Since we may need to wait several times,
2247 compute the absolute time to return at. */
2248 if (time_limit
|| microsecs
)
2250 EMACS_GET_TIME (end_time
);
2251 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
2252 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
2255 /* AlainF 5-Jul-1996
2256 HP-UX 10.10 seem to have problems with signals coming in
2257 Causes "poll: interrupted system call" messages when Emacs is run
2259 Turn off periodic alarms (in case they are in use) */
2265 int timeout_reduced_for_timers
= 0;
2267 /* If calling from keyboard input, do not quit
2268 since we want to return C-g as an input character.
2269 Otherwise, do pending quit if requested. */
2270 if (XINT (read_kbd
) >= 0)
2273 /* Exit now if the cell we're waiting for became non-nil. */
2274 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2277 /* Compute time from now till when time limit is up */
2278 /* Exit if already run out */
2279 if (time_limit
== -1)
2281 /* -1 specified for timeout means
2282 gobble output available now
2283 but don't wait at all. */
2285 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2287 else if (time_limit
|| microsecs
)
2289 EMACS_GET_TIME (timeout
);
2290 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
2291 if (EMACS_TIME_NEG_P (timeout
))
2296 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
2299 /* Normally we run timers here.
2300 But not if wait_for_cell; in those cases,
2301 the wait is supposed to be short,
2302 and those callers cannot handle running arbitrary Lisp code here. */
2303 if (! wait_for_cell
)
2305 EMACS_TIME timer_delay
;
2309 old_timers_run
= timers_run
;
2310 timer_delay
= timer_check (1);
2311 if (timers_run
!= old_timers_run
&& do_display
)
2313 redisplay_preserve_echo_area ();
2314 /* We must retry, since a timer may have requeued itself
2315 and that could alter the time_delay. */
2319 /* If there is unread keyboard input, also return. */
2320 if (XINT (read_kbd
) != 0
2321 && requeued_events_pending_p ())
2324 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
2326 EMACS_TIME difference
;
2327 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
2328 if (EMACS_TIME_NEG_P (difference
))
2330 timeout
= timer_delay
;
2331 timeout_reduced_for_timers
= 1;
2334 /* If time_limit is -1, we are not going to wait at all. */
2335 else if (time_limit
!= -1)
2337 /* This is so a breakpoint can be put here. */
2338 wait_reading_process_input_1 ();
2342 /* Cause C-g and alarm signals to take immediate action,
2343 and cause input available signals to zero out timeout.
2345 It is important that we do this before checking for process
2346 activity. If we get a SIGCHLD after the explicit checks for
2347 process activity, timeout is the only way we will know. */
2348 if (XINT (read_kbd
) < 0)
2349 set_waiting_for_input (&timeout
);
2351 /* If status of something has changed, and no input is
2352 available, notify the user of the change right away. After
2353 this explicit check, we'll let the SIGCHLD handler zap
2354 timeout to get our attention. */
2355 if (update_tick
!= process_tick
&& do_display
)
2357 Atemp
= input_wait_mask
;
2358 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2359 if ((select (max (max_process_desc
, max_keyboard_desc
) + 1,
2360 &Atemp
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2364 /* It's okay for us to do this and then continue with
2365 the loop, since timeout has already been zeroed out. */
2366 clear_waiting_for_input ();
2371 /* Don't wait for output from a non-running process. */
2372 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
2373 update_status (wait_proc
);
2375 && ! EQ (wait_proc
->status
, Qrun
))
2377 int nread
, total_nread
= 0;
2379 clear_waiting_for_input ();
2380 XSETPROCESS (proc
, wait_proc
);
2382 /* Read data from the process, until we exhaust it. */
2383 while (XINT (wait_proc
->infd
) >= 0
2385 = read_process_output (proc
, XINT (wait_proc
->infd
))))
2388 total_nread
+= nread
;
2390 else if (nread
== -1 && EIO
== errno
)
2394 if (total_nread
> 0 && do_display
)
2395 redisplay_preserve_echo_area ();
2400 /* Wait till there is something to do */
2403 Available
= non_process_wait_mask
;
2404 else if (! XINT (read_kbd
))
2405 Available
= non_keyboard_wait_mask
;
2407 Available
= input_wait_mask
;
2409 /* If frame size has changed or the window is newly mapped,
2410 redisplay now, before we start to wait. There is a race
2411 condition here; if a SIGIO arrives between now and the select
2412 and indicates that a frame is trashed, the select may block
2413 displaying a trashed screen. */
2414 if (frame_garbaged
&& do_display
)
2416 clear_waiting_for_input ();
2417 redisplay_preserve_echo_area ();
2418 if (XINT (read_kbd
) < 0)
2419 set_waiting_for_input (&timeout
);
2422 if (XINT (read_kbd
) && detect_input_pending ())
2425 FD_ZERO (&Available
);
2428 nfds
= select (max (max_process_desc
, max_keyboard_desc
) + 1,
2429 &Available
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2434 /* Make C-g and alarm signals set flags again */
2435 clear_waiting_for_input ();
2437 /* If we woke up due to SIGWINCH, actually change size now. */
2438 do_pending_window_change ();
2440 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
2441 /* We wanted the full specified time, so return now. */
2445 if (xerrno
== EINTR
)
2446 FD_ZERO (&Available
);
2448 /* Ultrix select seems to return ENOMEM when it is
2449 interrupted. Treat it just like EINTR. Bleah. Note
2450 that we want to test for the "ultrix" CPP symbol, not
2451 "__ultrix__"; the latter is only defined under GCC, but
2452 not by DEC's bundled CC. -JimB */
2453 else if (xerrno
== ENOMEM
)
2454 FD_ZERO (&Available
);
2457 /* This happens for no known reason on ALLIANT.
2458 I am guessing that this is the right response. -- RMS. */
2459 else if (xerrno
== EFAULT
)
2460 FD_ZERO (&Available
);
2462 else if (xerrno
== EBADF
)
2465 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
2466 the child's closure of the pts gives the parent a SIGHUP, and
2467 the ptc file descriptor is automatically closed,
2468 yielding EBADF here or at select() call above.
2469 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
2470 in m/ibmrt-aix.h), and here we just ignore the select error.
2471 Cleanup occurs c/o status_notify after SIGCLD. */
2472 FD_ZERO (&Available
); /* Cannot depend on values returned */
2478 error ("select error: %s", strerror (xerrno
));
2480 #if defined(sun) && !defined(USG5_4)
2481 else if (nfds
> 0 && keyboard_bit_set (&Available
)
2483 /* System sometimes fails to deliver SIGIO.
2485 David J. Mackenzie says that Emacs doesn't compile under
2486 Solaris if this code is enabled, thus the USG5_4 in the CPP
2487 conditional. "I haven't noticed any ill effects so far.
2488 If you find a Solaris expert somewhere, they might know
2490 kill (getpid (), SIGIO
);
2493 #if 0 /* When polling is used, interrupt_input is 0,
2494 so get_input_pending should read the input.
2495 So this should not be needed. */
2496 /* If we are using polling for input,
2497 and we see input available, make it get read now.
2498 Otherwise it might not actually get read for a second.
2499 And on hpux, since we turn off polling in wait_reading_process_input,
2500 it might never get read at all if we don't spend much time
2501 outside of wait_reading_process_input. */
2502 if (XINT (read_kbd
) && interrupt_input
2503 && keyboard_bit_set (&Available
)
2504 && input_polling_used ())
2505 kill (getpid (), SIGALRM
);
2508 /* Check for keyboard input */
2509 /* If there is any, return immediately
2510 to give it higher priority than subprocesses */
2512 if (XINT (read_kbd
) != 0
2513 && detect_input_pending_run_timers (do_display
))
2515 swallow_events (do_display
);
2516 if (detect_input_pending_run_timers (do_display
))
2520 /* If there is unread keyboard input, also return. */
2521 if (XINT (read_kbd
) != 0
2522 && requeued_events_pending_p ())
2525 /* If we are not checking for keyboard input now,
2526 do process events (but don't run any timers).
2527 This is so that X events will be processed.
2528 Otherwise they may have to wait until polling takes place.
2529 That would causes delays in pasting selections, for example.
2531 (We used to do this only if wait_for_cell.) */
2532 if (XINT (read_kbd
) == 0 && detect_input_pending ())
2534 swallow_events (do_display
);
2535 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
2536 if (detect_input_pending ())
2541 /* Exit now if the cell we're waiting for became non-nil. */
2542 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2546 /* If we think we have keyboard input waiting, but didn't get SIGIO,
2547 go read it. This can happen with X on BSD after logging out.
2548 In that case, there really is no input and no SIGIO,
2549 but select says there is input. */
2551 if (XINT (read_kbd
) && interrupt_input
2552 && keyboard_bit_set (&Available
))
2553 kill (getpid (), SIGIO
);
2557 got_some_input
|= nfds
> 0;
2559 /* If checking input just got us a size-change event from X,
2560 obey it now if we should. */
2561 if (XINT (read_kbd
) || wait_for_cell
)
2562 do_pending_window_change ();
2564 /* Check for data from a process. */
2565 /* Really FIRST_PROC_DESC should be 0 on Unix,
2566 but this is safer in the short run. */
2567 for (channel
= 0; channel
<= max_process_desc
; channel
++)
2569 if (FD_ISSET (channel
, &Available
)
2570 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
2574 /* If waiting for this channel, arrange to return as
2575 soon as no more input to be processed. No more
2577 if (wait_channel
== channel
)
2583 proc
= chan_process
[channel
];
2587 /* Read data from the process, starting with our
2588 buffered-ahead character if we have one. */
2590 nread
= read_process_output (proc
, channel
);
2593 /* Since read_process_output can run a filter,
2594 which can call accept-process-output,
2595 don't try to read from any other processes
2596 before doing the select again. */
2597 FD_ZERO (&Available
);
2600 redisplay_preserve_echo_area ();
2603 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2606 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
2607 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
2609 else if (nread
== -1 && errno
== EAGAIN
)
2613 else if (nread
== -1 && errno
== EAGAIN
)
2615 /* Note that we cannot distinguish between no input
2616 available now and a closed pipe.
2617 With luck, a closed pipe will be accompanied by
2618 subprocess termination and SIGCHLD. */
2619 else if (nread
== 0 && !NETCONN_P (proc
))
2621 #endif /* O_NDELAY */
2622 #endif /* O_NONBLOCK */
2624 /* On some OSs with ptys, when the process on one end of
2625 a pty exits, the other end gets an error reading with
2626 errno = EIO instead of getting an EOF (0 bytes read).
2627 Therefore, if we get an error reading and errno =
2628 EIO, just continue, because the child process has
2629 exited and should clean itself up soon (e.g. when we
2631 else if (nread
== -1 && errno
== EIO
)
2633 #endif /* HAVE_PTYS */
2634 /* If we can detect process termination, don't consider the process
2635 gone just because its pipe is closed. */
2637 else if (nread
== 0 && !NETCONN_P (proc
))
2642 /* Preserve status of processes already terminated. */
2643 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2644 deactivate_process (proc
);
2645 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2646 update_status (XPROCESS (proc
));
2647 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2648 XPROCESS (proc
)->status
2649 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2652 } /* end for each file descriptor */
2653 } /* end while exit conditions not met */
2655 waiting_for_user_input_p
= 0;
2657 /* If calling from keyboard input, do not quit
2658 since we want to return C-g as an input character.
2659 Otherwise, do pending quit if requested. */
2660 if (XINT (read_kbd
) >= 0)
2662 /* Prevent input_pending from remaining set if we quit. */
2663 clear_input_pending ();
2667 /* AlainF 5-Jul-1996
2668 HP-UX 10.10 seems to have problems with signals coming in
2669 Causes "poll: interrupted system call" messages when Emacs is run
2671 Turn periodic alarms back on */
2675 return got_some_input
;
2678 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
2681 read_process_output_call (fun_and_args
)
2682 Lisp_Object fun_and_args
;
2684 return apply1 (XCONS (fun_and_args
)->car
, XCONS (fun_and_args
)->cdr
);
2688 read_process_output_error_handler (error
)
2691 cmd_error_internal (error
, "error in process filter: ");
2693 update_echo_area ();
2694 Fsleep_for (make_number (2), Qnil
);
2697 /* Read pending output from the process channel,
2698 starting with our buffered-ahead character if we have one.
2699 Yield number of decoded characters read.
2701 This function reads at most 1024 characters.
2702 If you want to read all available subprocess output,
2703 you must call it repeatedly until it returns zero.
2705 The characters read are decoded according to PROC's coding-system
2708 read_process_output (proc
, channel
)
2710 register int channel
;
2712 register int nchars
;
2715 int chars_allocated
= 0; /* If 1, `chars' should be freed later. */
2719 register Lisp_Object outstream
;
2720 register struct buffer
*old
= current_buffer
;
2721 register struct Lisp_Process
*p
= XPROCESS (proc
);
2722 register int opoint
;
2723 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
2724 int chars_in_decoding_buf
= 0; /* If 1, `chars' points
2725 XSTRING (p->decoding_buf)->data. */
2728 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2730 vs
= get_vms_process_pointer (p
->pid
);
2734 return(0); /* Really weird if it does this */
2735 if (!(vs
->iosb
[0] & 1))
2736 return -1; /* I/O error */
2739 error ("Could not get VMS process pointer");
2740 chars
= vs
->inputBuffer
;
2741 nchars
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2744 start_vms_process_read (vs
); /* Crank up the next read on the process */
2745 return 1; /* Nothing worth printing, say we got 1 */
2747 if (coding
->carryover_size
)
2749 /* The data carried over in the previous decoding should be
2750 prepended to the new data read to decode all together. */
2751 char *buf
= (char *) xmalloc (nchars
+ coding
->carryover_size
);
2753 bcopy (coding
->carryover
, buf
, coding
->carryover_size
);
2754 bcopy (chars
, buf
+ coding
->carryover_size
, nchars
);
2756 chars_allocated
= 1;
2760 if (coding
->carryover_size
)
2761 /* The data carried over in the previous decoding should be
2762 prepended to the new data read to decode all together. */
2763 bcopy (coding
->carryover
, buf
, coding
->carryover_size
);
2765 if (proc_buffered_char
[channel
] < 0)
2766 nchars
= read (channel
, buf
+ coding
->carryover_size
,
2767 (sizeof buf
) - coding
->carryover_size
);
2770 buf
[coding
->carryover_size
] = proc_buffered_char
[channel
];
2771 proc_buffered_char
[channel
] = -1;
2772 nchars
= read (channel
, buf
+ coding
->carryover_size
+ 1,
2773 (sizeof buf
) - coding
->carryover_size
- 1);
2777 nchars
= nchars
+ 1;
2780 #endif /* not VMS */
2782 /* At this point, NCHARS holds number of characters just received
2783 (including the one in proc_buffered_char[channel]). */
2784 if (nchars
<= 0) return nchars
;
2786 /* Now set NCHARS how many bytes we must decode. */
2787 nchars
+= coding
->carryover_size
;
2789 if (CODING_REQUIRE_DECODING (coding
)
2790 || CODING_REQUIRE_DETECTION (coding
))
2792 int require
= decoding_buffer_size (coding
, nchars
);
2793 int consumed
, produced
;
2795 if (XSTRING (p
->decoding_buf
)->size
< require
)
2796 p
->decoding_buf
= make_uninit_string (require
);
2797 produced
= decode_coding (coding
, chars
, XSTRING (p
->decoding_buf
)->data
,
2798 nchars
, XSTRING (p
->decoding_buf
)->size
,
2801 /* New coding-system might be found by `decode_coding'. */
2802 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
2804 p
->decode_coding_system
= coding
->symbol
;
2806 /* Don't call setup_coding_system for
2807 proc_decode_coding_system[channel] here. It is done in
2808 detect_coding called via decode_coding above. */
2810 /* If coding-system for encoding is not yet decided, we set
2811 it as the same as coding-system for decoding.
2813 But, before doing that we must check if
2814 proc_encode_coding_system[p->outfd] surely points to a
2815 valid memory because p->outfd will be changed once EOF is
2816 sent to the process. */
2817 if (NILP (p
->encode_coding_system
)
2818 && proc_encode_coding_system
[p
->outfd
])
2820 p
->encode_coding_system
= coding
->symbol
;
2821 setup_coding_system (coding
->symbol
,
2822 proc_encode_coding_system
[p
->outfd
]);
2826 /* Now we don't need the contents of `chars'. */
2827 if (chars_allocated
)
2832 chars
= (char *) XSTRING (p
->decoding_buf
)->data
;
2834 chars_in_decoding_buf
= 1;
2837 else if (chars_allocated
)
2839 /* Although we don't have to decode the received data, we must
2840 move it to an area which we don't have to free. */
2841 if (! STRINGP (p
->decoding_buf
)
2842 || XSTRING (p
->decoding_buf
)->size
< nchars
)
2843 p
->decoding_buf
= make_uninit_string (nchars
);
2844 bcopy (chars
, XSTRING (p
->decoding_buf
)->data
, nchars
);
2846 chars
= XSTRING (p
->decoding_buf
)->data
;
2847 chars_in_decoding_buf
= 1;
2851 Vlast_coding_system_used
= coding
->symbol
;
2853 outstream
= p
->filter
;
2854 if (!NILP (outstream
))
2856 /* We inhibit quit here instead of just catching it so that
2857 hitting ^G when a filter happens to be running won't screw
2859 int count
= specpdl_ptr
- specpdl
;
2860 Lisp_Object odeactivate
;
2861 Lisp_Object obuffer
, okeymap
;
2862 int outer_running_asynch_code
= running_asynch_code
;
2864 /* No need to gcpro these, because all we do with them later
2865 is test them for EQness, and none of them should be a string. */
2866 odeactivate
= Vdeactivate_mark
;
2867 XSETBUFFER (obuffer
, current_buffer
);
2868 okeymap
= current_buffer
->keymap
;
2870 specbind (Qinhibit_quit
, Qt
);
2871 specbind (Qlast_nonmenu_event
, Qt
);
2873 /* In case we get recursively called,
2874 and we already saved the match data nonrecursively,
2875 save the same match data in safely recursive fashion. */
2876 if (outer_running_asynch_code
)
2879 /* Don't clobber the CURRENT match data, either! */
2880 tem
= Fmatch_data (Qnil
, Qnil
);
2881 restore_match_data ();
2882 record_unwind_protect (Fstore_match_data
, Fmatch_data (Qnil
, Qnil
));
2883 Fstore_match_data (tem
);
2886 /* For speed, if a search happens within this code,
2887 save the match data in a special nonrecursive fashion. */
2888 running_asynch_code
= 1;
2890 /* Read and dispose of the process output. */
2891 internal_condition_case_1 (read_process_output_call
,
2894 Fcons (make_string (chars
,
2897 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
2898 read_process_output_error_handler
);
2900 /* If we saved the match data nonrecursively, restore it now. */
2901 restore_match_data ();
2902 running_asynch_code
= outer_running_asynch_code
;
2904 /* Handling the process output should not deactivate the mark. */
2905 Vdeactivate_mark
= odeactivate
;
2907 #if 0 /* Call record_asynch_buffer_change unconditionally,
2908 because we might have changed minor modes or other things
2909 that affect key bindings. */
2910 if (! EQ (Fcurrent_buffer (), obuffer
)
2911 || ! EQ (current_buffer
->keymap
, okeymap
))
2913 /* But do it only if the caller is actually going to read events.
2914 Otherwise there's no need to make him wake up, and it could
2915 cause trouble (for example it would make Fsit_for return). */
2916 if (waiting_for_user_input_p
== -1)
2917 record_asynch_buffer_change ();
2920 start_vms_process_read (vs
);
2922 unbind_to (count
, Qnil
);
2926 /* If no filter, write into buffer if it isn't dead. */
2927 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2929 Lisp_Object old_read_only
;
2930 int old_begv
, old_zv
;
2931 Lisp_Object odeactivate
;
2934 odeactivate
= Vdeactivate_mark
;
2936 Fset_buffer (p
->buffer
);
2938 old_read_only
= current_buffer
->read_only
;
2942 current_buffer
->read_only
= Qnil
;
2944 /* Insert new output into buffer
2945 at the current end-of-output marker,
2946 thus preserving logical ordering of input and output. */
2947 if (XMARKER (p
->mark
)->buffer
)
2948 SET_PT (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
));
2953 /* If the output marker is outside of the visible region, save
2954 the restriction and widen. */
2955 if (! (BEGV
<= PT
&& PT
<= ZV
))
2958 /* Insert before markers in case we are inserting where
2959 the buffer's mark is, and the user's next command is Meta-y. */
2960 if (chars_in_decoding_buf
)
2961 insert_from_string_before_markers (p
->decoding_buf
, 0, nchars
, 0);
2963 insert_before_markers (chars
, nchars
);
2964 Fset_marker (p
->mark
, make_number (PT
), p
->buffer
);
2966 update_mode_lines
++;
2968 /* Make sure opoint and the old restrictions
2969 float ahead of any new text just as point would. */
2970 if (opoint
>= before
)
2971 opoint
+= PT
- before
;
2972 if (old_begv
> before
)
2973 old_begv
+= PT
- before
;
2974 if (old_zv
>= before
)
2975 old_zv
+= PT
- before
;
2977 /* If the restriction isn't what it should be, set it. */
2978 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
2979 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
2981 /* Handling the process output should not deactivate the mark. */
2982 Vdeactivate_mark
= odeactivate
;
2984 current_buffer
->read_only
= old_read_only
;
2986 set_buffer_internal (old
);
2989 start_vms_process_read (vs
);
2994 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
2996 "Returns non-nil if emacs is waiting for input from the user.\n\
2997 This is intended for use by asynchronous process output filters and sentinels.")
3000 return (waiting_for_user_input_p
? Qt
: Qnil
);
3003 /* Sending data to subprocess */
3005 jmp_buf send_process_frame
;
3008 send_process_trap ()
3014 longjmp (send_process_frame
, 1);
3017 /* Send some data to process PROC.
3018 BUF is the beginning of the data; LEN is the number of characters.
3019 OBJECT is the Lisp object that the data comes from.
3021 The data is encoded by PROC's coding-system for encoding before it
3022 is sent. But if the data ends at the middle of multi-byte
3023 representation, that incomplete sequence of bytes are sent without
3024 being encoded. Should we store them in a buffer to prepend them to
3025 the data send later? */
3027 send_process (proc
, buf
, len
, object
)
3028 volatile Lisp_Object proc
;
3033 /* Use volatile to protect variables from being clobbered by longjmp. */
3035 volatile unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
3036 struct coding_system
*coding
;
3037 struct gcpro gcpro1
;
3042 struct Lisp_Process
*p
= XPROCESS (proc
);
3043 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
3046 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3047 update_status (XPROCESS (proc
));
3048 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3049 error ("Process %s not running", procname
);
3050 if (XINT (XPROCESS (proc
)->outfd
) < 0)
3051 error ("Output file descriptor of %s is closed", procname
);
3053 coding
= proc_encode_coding_system
[XINT (XPROCESS (proc
)->outfd
)];
3054 Vlast_coding_system_used
= coding
->symbol
;
3056 if (CODING_REQUIRE_ENCODING (coding
))
3058 int require
= encoding_buffer_size (coding
, len
);
3060 unsigned char *temp_buf
= NULL
;
3062 /* Remember the offset of data because a string or a buffer may
3063 be relocated. Setting OFFSET to -1 means we don't have to
3065 offset
= (BUFFERP (object
)
3066 ? BUF_PTR_CHAR_POS (XBUFFER (object
), buf
)
3068 ? offset
= buf
- XSTRING (object
)->data
3071 if (coding
->carryover_size
> 0)
3073 temp_buf
= (unsigned char *) xmalloc (len
+ coding
->carryover_size
);
3077 if (BUFFERP (object
))
3078 buf
= BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
3079 else if (STRINGP (object
))
3080 buf
= offset
+ XSTRING (object
)->data
;
3081 /* Now we don't have to care relocation. */
3084 bcopy (coding
->carryover
, temp_buf
, coding
->carryover_size
);
3085 bcopy (buf
, temp_buf
+ coding
->carryover_size
, len
);
3089 if (XSTRING (XPROCESS (proc
)->encoding_buf
)->size
< require
)
3091 XPROCESS (proc
)->encoding_buf
= make_uninit_string (require
);
3095 if (BUFFERP (object
))
3096 buf
= BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
3097 else if (STRINGP (object
))
3098 buf
= offset
+ XSTRING (object
)->data
;
3101 object
= XPROCESS (proc
)->encoding_buf
;
3102 len
= encode_coding (coding
, buf
, XSTRING (object
)->data
,
3103 len
, XSTRING (object
)->size
, &dummy
);
3104 buf
= XSTRING (object
)->data
;
3110 vs
= get_vms_process_pointer (p
->pid
);
3112 error ("Could not find this process: %x", p
->pid
);
3113 else if (write_to_vms_process (vs
, buf
, len
))
3117 if (pty_max_bytes
== 0)
3119 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
3120 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
3122 if (pty_max_bytes
< 0)
3123 pty_max_bytes
= 250;
3125 pty_max_bytes
= 250;
3127 /* Deduct one, to leave space for the eof. */
3131 if (!setjmp (send_process_frame
))
3135 SIGTYPE (*old_sigpipe
)();
3138 /* Decide how much data we can send in one batch.
3139 Long lines need to be split into multiple batches. */
3140 if (!NILP (XPROCESS (proc
)->pty_flag
))
3142 /* Starting this at zero is always correct when not the first iteration
3143 because the previous iteration ended by sending C-d.
3144 It may not be correct for the first iteration
3145 if a partial line was sent in a separate send_process call.
3146 If that proves worth handling, we need to save linepos
3147 in the process object. */
3149 unsigned char *ptr
= buf
;
3150 unsigned char *end
= buf
+ len
;
3152 /* Scan through this text for a line that is too long. */
3153 while (ptr
!= end
&& linepos
< pty_max_bytes
)
3161 /* If we found one, break the line there
3162 and put in a C-d to force the buffer through. */
3166 /* Send this batch, using one or more write calls. */
3169 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
3170 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
3171 signal (SIGPIPE
, old_sigpipe
);
3177 || errno
== EWOULDBLOCK
3183 /* Buffer is full. Wait, accepting input;
3184 that may allow the program
3185 to finish doing output and read more. */
3190 /* Running filters might relocate buffers or strings.
3191 Arrange to relocate BUF. */
3192 if (BUFFERP (object
))
3193 offset
= BUF_PTR_CHAR_POS (XBUFFER (object
), buf
);
3194 else if (STRINGP (object
))
3195 offset
= buf
- XSTRING (object
)->data
;
3197 XSETFASTINT (zero
, 0);
3198 #ifdef EMACS_HAS_USECS
3199 wait_reading_process_input (0, 20000, zero
, 0);
3201 wait_reading_process_input (1, 0, zero
, 0);
3204 if (BUFFERP (object
))
3205 buf
= BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
3206 else if (STRINGP (object
))
3207 buf
= offset
+ XSTRING (object
)->data
;
3212 /* This is a real error. */
3213 report_file_error ("writing to process", Fcons (proc
, Qnil
));
3220 /* If we sent just part of the string, put in an EOF
3221 to force it through, before we send the rest. */
3223 Fprocess_send_eof (proc
);
3228 XPROCESS (proc
)->raw_status_low
= Qnil
;
3229 XPROCESS (proc
)->raw_status_high
= Qnil
;
3230 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
3231 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
3232 deactivate_process (proc
);
3234 error ("Error writing to process %s; closed it", procname
);
3236 error ("SIGPIPE raised on process %s; closed it", procname
);
3243 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
3245 "Send current contents of region as input to PROCESS.\n\
3246 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3247 nil, indicating the current buffer's process.\n\
3248 Called from program, takes three arguments, PROCESS, START and END.\n\
3249 If the region is more than 500 characters long,\n\
3250 it is sent in several bunches. This may happen even for shorter regions.\n\
3251 Output from processes can arrive in between bunches.")
3252 (process
, start
, end
)
3253 Lisp_Object process
, start
, end
;
3258 proc
= get_process (process
);
3259 validate_region (&start
, &end
);
3261 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
3262 move_gap (XINT (start
));
3264 start1
= XINT (start
);
3265 send_process (proc
, POS_ADDR (start1
), XINT (end
) - XINT (start
),
3266 Fcurrent_buffer ());
3271 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
3273 "Send PROCESS the contents of STRING as input.\n\
3274 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3275 nil, indicating the current buffer's process.\n\
3276 If STRING is more than 500 characters long,\n\
3277 it is sent in several bunches. This may happen even for shorter strings.\n\
3278 Output from processes can arrive in between bunches.")
3280 Lisp_Object process
, string
;
3283 CHECK_STRING (string
, 1);
3284 proc
= get_process (process
);
3285 send_process (proc
, XSTRING (string
)->data
, XSTRING (string
)->size
, string
);
3289 /* send a signal number SIGNO to PROCESS.
3290 CURRENT_GROUP means send to the process group that currently owns
3291 the terminal being used to communicate with PROCESS.
3292 This is used for various commands in shell mode.
3293 If NOMSG is zero, insert signal-announcements into process's buffers
3296 If we can, we try to signal PROCESS by sending control characters
3297 down the pty. This allows us to signal inferiors who have changed
3298 their uid, for which killpg would return an EPERM error. */
3301 process_send_signal (process
, signo
, current_group
, nomsg
)
3302 Lisp_Object process
;
3304 Lisp_Object current_group
;
3308 register struct Lisp_Process
*p
;
3312 proc
= get_process (process
);
3313 p
= XPROCESS (proc
);
3315 if (!EQ (p
->childp
, Qt
))
3316 error ("Process %s is not a subprocess",
3317 XSTRING (p
->name
)->data
);
3318 if (XINT (p
->infd
) < 0)
3319 error ("Process %s is not active",
3320 XSTRING (p
->name
)->data
);
3322 if (NILP (p
->pty_flag
))
3323 current_group
= Qnil
;
3325 /* If we are using pgrps, get a pgrp number and make it negative. */
3326 if (!NILP (current_group
))
3328 #ifdef SIGNALS_VIA_CHARACTERS
3329 /* If possible, send signals to the entire pgrp
3330 by sending an input character to it. */
3332 /* TERMIOS is the latest and bestest, and seems most likely to
3333 work. If the system has it, use it. */
3340 tcgetattr (XINT (p
->infd
), &t
);
3341 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
3345 tcgetattr (XINT (p
->infd
), &t
);
3346 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
3350 tcgetattr (XINT (p
->infd
), &t
);
3351 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
3352 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
3354 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
3359 #else /* ! HAVE_TERMIOS */
3361 /* On Berkeley descendants, the following IOCTL's retrieve the
3362 current control characters. */
3363 #if defined (TIOCGLTC) && defined (TIOCGETC)
3371 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
3372 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
3375 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
3376 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
3380 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
3381 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
3383 #endif /* ! defined (SIGTSTP) */
3386 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
3388 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
3395 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3396 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
3399 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3400 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
3404 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3405 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
3407 #endif /* ! defined (SIGTSTP) */
3409 #else /* ! defined (TCGETA) */
3410 Your configuration files are messed up
.
3411 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
3412 you'd better be using one of the alternatives above! */
3413 #endif /* ! defined (TCGETA) */
3414 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
3415 #endif /* ! defined HAVE_TERMIOS */
3416 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
3419 /* Get the pgrp using the tty itself, if we have that.
3420 Otherwise, use the pty to get the pgrp.
3421 On pfa systems, saka@pfu.fujitsu.co.JP writes:
3422 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
3423 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
3424 His patch indicates that if TIOCGPGRP returns an error, then
3425 we should just assume that p->pid is also the process group id. */
3429 if (!NILP (p
->subtty
))
3430 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
3432 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
3436 gid
= - XFASTINT (p
->pid
);
3437 #endif /* ! defined (pfa) */
3443 #else /* ! defined (TIOCGPGRP ) */
3444 /* Can't select pgrps on this system, so we know that
3445 the child itself heads the pgrp. */
3446 gid
= - XFASTINT (p
->pid
);
3447 #endif /* ! defined (TIOCGPGRP ) */
3450 gid
= - XFASTINT (p
->pid
);
3456 p
->raw_status_low
= Qnil
;
3457 p
->raw_status_high
= Qnil
;
3459 XSETINT (p
->tick
, ++process_tick
);
3463 #endif /* ! defined (SIGCONT) */
3466 send_process (proc
, "\003", 1, Qnil
); /* ^C */
3471 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
3476 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
3479 flush_pending_output (XINT (p
->infd
));
3483 /* If we don't have process groups, send the signal to the immediate
3484 subprocess. That isn't really right, but it's better than any
3485 obvious alternative. */
3488 kill (XFASTINT (p
->pid
), signo
);
3492 /* gid may be a pid, or minus a pgrp's number */
3494 if (!NILP (current_group
))
3495 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
3498 gid
= - XFASTINT (p
->pid
);
3501 #else /* ! defined (TIOCSIGSEND) */
3502 EMACS_KILLPG (-gid
, signo
);
3503 #endif /* ! defined (TIOCSIGSEND) */
3506 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
3507 "Interrupt process PROCESS. May be process or name of one.\n\
3508 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
3509 nil or no arg means current buffer's process.\n\
3510 Second arg CURRENT-GROUP non-nil means send signal to\n\
3511 the current process-group of the process's controlling terminal\n\
3512 rather than to the process's own process group.\n\
3513 If the process is a shell, this means interrupt current subjob\n\
3514 rather than the shell.")
3515 (process
, current_group
)
3516 Lisp_Object process
, current_group
;
3518 process_send_signal (process
, SIGINT
, current_group
, 0);
3522 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
3523 "Kill process PROCESS. May be process or name of one.\n\
3524 See function `interrupt-process' for more details on usage.")
3525 (process
, current_group
)
3526 Lisp_Object process
, current_group
;
3528 process_send_signal (process
, SIGKILL
, current_group
, 0);
3532 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
3533 "Send QUIT signal to process PROCESS. May be process or name of one.\n\
3534 See function `interrupt-process' for more details on usage.")
3535 (process
, current_group
)
3536 Lisp_Object process
, current_group
;
3538 process_send_signal (process
, SIGQUIT
, current_group
, 0);
3542 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
3543 "Stop process PROCESS. May be process or name of one.\n\
3544 See function `interrupt-process' for more details on usage.")
3545 (process
, current_group
)
3546 Lisp_Object process
, current_group
;
3549 error ("no SIGTSTP support");
3551 process_send_signal (process
, SIGTSTP
, current_group
, 0);
3556 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
3557 "Continue process PROCESS. May be process or name of one.\n\
3558 See function `interrupt-process' for more details on usage.")
3559 (process
, current_group
)
3560 Lisp_Object process
, current_group
;
3563 process_send_signal (process
, SIGCONT
, current_group
, 0);
3565 error ("no SIGCONT support");
3570 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
3571 2, 2, "nProcess number: \nnSignal code: ",
3572 "Send the process with process id PID the signal with code SIGCODE.\n\
3573 PID must be an integer. The process need not be a child of this Emacs.\n\
3574 SIGCODE may be an integer, or a symbol whose name is a signal name.")
3576 Lisp_Object pid
, sigcode
;
3578 CHECK_NUMBER (pid
, 0);
3580 #define handle_signal(NAME, VALUE) \
3581 else if (!strcmp (name, NAME)) \
3582 XSETINT (sigcode, VALUE)
3584 if (INTEGERP (sigcode
))
3588 unsigned char *name
;
3590 CHECK_SYMBOL (sigcode
, 1);
3591 name
= XSYMBOL (sigcode
)->name
->data
;
3596 handle_signal ("SIGHUP", SIGHUP
);
3599 handle_signal ("SIGINT", SIGINT
);
3602 handle_signal ("SIGQUIT", SIGQUIT
);
3605 handle_signal ("SIGILL", SIGILL
);
3608 handle_signal ("SIGABRT", SIGABRT
);
3611 handle_signal ("SIGEMT", SIGEMT
);
3614 handle_signal ("SIGKILL", SIGKILL
);
3617 handle_signal ("SIGFPE", SIGFPE
);
3620 handle_signal ("SIGBUS", SIGBUS
);
3623 handle_signal ("SIGSEGV", SIGSEGV
);
3626 handle_signal ("SIGSYS", SIGSYS
);
3629 handle_signal ("SIGPIPE", SIGPIPE
);
3632 handle_signal ("SIGALRM", SIGALRM
);
3635 handle_signal ("SIGTERM", SIGTERM
);
3638 handle_signal ("SIGURG", SIGURG
);
3641 handle_signal ("SIGSTOP", SIGSTOP
);
3644 handle_signal ("SIGTSTP", SIGTSTP
);
3647 handle_signal ("SIGCONT", SIGCONT
);
3650 handle_signal ("SIGCHLD", SIGCHLD
);
3653 handle_signal ("SIGTTIN", SIGTTIN
);
3656 handle_signal ("SIGTTOU", SIGTTOU
);
3659 handle_signal ("SIGIO", SIGIO
);
3662 handle_signal ("SIGXCPU", SIGXCPU
);
3665 handle_signal ("SIGXFSZ", SIGXFSZ
);
3668 handle_signal ("SIGVTALRM", SIGVTALRM
);
3671 handle_signal ("SIGPROF", SIGPROF
);
3674 handle_signal ("SIGWINCH", SIGWINCH
);
3677 handle_signal ("SIGINFO", SIGINFO
);
3680 handle_signal ("SIGUSR1", SIGUSR1
);
3683 handle_signal ("SIGUSR2", SIGUSR2
);
3686 error ("Undefined signal name %s", name
);
3689 #undef handle_signal
3691 return make_number (kill (XINT (pid
), XINT (sigcode
)));
3694 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
3695 "Make PROCESS see end-of-file in its input.\n\
3696 Eof comes after any text already sent to it.\n\
3697 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3698 nil, indicating the current buffer's process.\n\
3699 If PROCESS is a network connection, or is a process communicating\n\
3700 through a pipe (as opposed to a pty), then you cannot send any more\n\
3701 text to PROCESS after you call this function.")
3703 Lisp_Object process
;
3707 proc
= get_process (process
);
3709 /* Make sure the process is really alive. */
3710 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3711 update_status (XPROCESS (proc
));
3712 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3713 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
3716 send_process (proc
, "\032", 1, Qnil
); /* ^z */
3718 if (!NILP (XPROCESS (proc
)->pty_flag
))
3719 send_process (proc
, "\004", 1, Qnil
);
3722 #ifdef HAVE_SHUTDOWN
3723 /* If this is a network connection, or socketpair is used
3724 for communication with the subprocess, call shutdown to cause EOF.
3725 (In some old system, shutdown to socketpair doesn't work.
3726 Then we just can't win.) */
3727 if (NILP (XPROCESS (proc
)->pid
)
3728 || XINT (XPROCESS (proc
)->outfd
) == XINT (XPROCESS (proc
)->infd
))
3729 shutdown (XINT (XPROCESS (proc
)->outfd
), 1);
3730 /* In case of socketpair, outfd == infd, so don't close it. */
3731 if (XINT (XPROCESS (proc
)->outfd
) != XINT (XPROCESS (proc
)->infd
))
3732 close (XINT (XPROCESS (proc
)->outfd
));
3733 #else /* not HAVE_SHUTDOWN */
3734 close (XINT (XPROCESS (proc
)->outfd
));
3735 #endif /* not HAVE_SHUTDOWN */
3736 XSETINT (XPROCESS (proc
)->outfd
, open (NULL_DEVICE
, O_WRONLY
));
3742 /* Kill all processes associated with `buffer'.
3743 If `buffer' is nil, kill all processes */
3746 kill_buffer_processes (buffer
)
3749 Lisp_Object tail
, proc
;
3751 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3753 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3754 if (GC_PROCESSP (proc
)
3755 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
3757 if (NETCONN_P (proc
))
3758 Fdelete_process (proc
);
3759 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
3760 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
3765 /* On receipt of a signal that a child status has changed,
3766 loop asking about children with changed statuses until
3767 the system says there are no more.
3768 All we do is change the status;
3769 we do not run sentinels or print notifications.
3770 That is saved for the next time keyboard input is done,
3771 in order to avoid timing errors. */
3773 /** WARNING: this can be called during garbage collection.
3774 Therefore, it must not be fooled by the presence of mark bits in
3777 /** USG WARNING: Although it is not obvious from the documentation
3778 in signal(2), on a USG system the SIGCLD handler MUST NOT call
3779 signal() before executing at least one wait(), otherwise the handler
3780 will be called again, resulting in an infinite loop. The relevant
3781 portion of the documentation reads "SIGCLD signals will be queued
3782 and the signal-catching function will be continually reentered until
3783 the queue is empty". Invoking signal() causes the kernel to reexamine
3784 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
3787 sigchld_handler (signo
)
3790 int old_errno
= errno
;
3792 register struct Lisp_Process
*p
;
3793 extern EMACS_TIME
*input_available_clear_time
;
3797 sigheld
|= sigbit (SIGCHLD
);
3809 #endif /* no WUNTRACED */
3810 /* Keep trying to get a status until we get a definitive result. */
3814 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
3816 while (pid
<= 0 && errno
== EINTR
);
3820 /* A real failure. We have done all our job, so return. */
3822 /* USG systems forget handlers when they are used;
3823 must reestablish each time */
3824 #if defined (USG) && !defined (POSIX_SIGNALS)
3825 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
3828 sigheld
&= ~sigbit (SIGCHLD
);
3836 #endif /* no WNOHANG */
3838 /* Find the process that signaled us, and record its status. */
3841 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3843 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3844 p
= XPROCESS (proc
);
3845 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
3850 /* Look for an asynchronous process whose pid hasn't been filled
3853 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3855 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3856 p
= XPROCESS (proc
);
3857 if (INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
3862 /* Change the status of the process that was found. */
3865 union { int i
; WAITTYPE wt
; } u
;
3866 int clear_desc_flag
= 0;
3868 XSETINT (p
->tick
, ++process_tick
);
3870 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
3871 XSETINT (p
->raw_status_high
, u
.i
>> 16);
3873 /* If process has terminated, stop waiting for its output. */
3874 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
3875 && XINT (p
->infd
) >= 0)
3876 clear_desc_flag
= 1;
3878 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
3879 if (clear_desc_flag
)
3881 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
3882 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
3885 /* Tell wait_reading_process_input that it needs to wake up and
3887 if (input_available_clear_time
)
3888 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3891 /* There was no asynchronous process found for that id. Check
3892 if we have a synchronous process. */
3895 synch_process_alive
= 0;
3897 /* Report the status of the synchronous process. */
3899 synch_process_retcode
= WRETCODE (w
);
3900 else if (WIFSIGNALED (w
))
3902 int code
= WTERMSIG (w
);
3908 /* Suppress warning if the table has const char *. */
3909 signame
= (char *) sys_siglist
[code
];
3911 signame
= sys_errlist
[code
];
3915 signame
= "unknown";
3917 synch_process_death
= signame
;
3920 /* Tell wait_reading_process_input that it needs to wake up and
3922 if (input_available_clear_time
)
3923 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3926 /* On some systems, we must return right away.
3927 If any more processes want to signal us, we will
3929 Otherwise (on systems that have WNOHANG), loop around
3930 to use up all the processes that have something to tell us. */
3931 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT)
3932 #if defined (USG) && ! defined (POSIX_SIGNALS)
3933 signal (signo
, sigchld_handler
);
3937 #endif /* USG, but not HPUX with WNOHANG */
3943 exec_sentinel_unwind (data
)
3946 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
3951 exec_sentinel_error_handler (error
)
3954 cmd_error_internal (error
, "error in process sentinel: ");
3956 update_echo_area ();
3957 Fsleep_for (make_number (2), Qnil
);
3961 exec_sentinel (proc
, reason
)
3962 Lisp_Object proc
, reason
;
3964 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
3965 register struct Lisp_Process
*p
= XPROCESS (proc
);
3966 int count
= specpdl_ptr
- specpdl
;
3967 int outer_running_asynch_code
= running_asynch_code
;
3969 /* No need to gcpro these, because all we do with them later
3970 is test them for EQness, and none of them should be a string. */
3971 odeactivate
= Vdeactivate_mark
;
3972 XSETBUFFER (obuffer
, current_buffer
);
3973 okeymap
= current_buffer
->keymap
;
3975 sentinel
= p
->sentinel
;
3976 if (NILP (sentinel
))
3979 /* Zilch the sentinel while it's running, to avoid recursive invocations;
3980 assure that it gets restored no matter how the sentinel exits. */
3982 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
3983 /* Inhibit quit so that random quits don't screw up a running filter. */
3984 specbind (Qinhibit_quit
, Qt
);
3985 specbind (Qlast_nonmenu_event
, Qt
);
3987 /* In case we get recursively called,
3988 and we already saved the match data nonrecursively,
3989 save the same match data in safely recursive fashion. */
3990 if (outer_running_asynch_code
)
3993 tem
= Fmatch_data (Qnil
, Qnil
);
3994 restore_match_data ();
3995 record_unwind_protect (Fstore_match_data
, Fmatch_data (Qnil
, Qnil
));
3996 Fstore_match_data (tem
);
3999 /* For speed, if a search happens within this code,
4000 save the match data in a special nonrecursive fashion. */
4001 running_asynch_code
= 1;
4003 internal_condition_case_1 (read_process_output_call
,
4005 Fcons (proc
, Fcons (reason
, Qnil
))),
4006 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
4007 exec_sentinel_error_handler
);
4009 /* If we saved the match data nonrecursively, restore it now. */
4010 restore_match_data ();
4011 running_asynch_code
= outer_running_asynch_code
;
4013 Vdeactivate_mark
= odeactivate
;
4015 if (! EQ (Fcurrent_buffer (), obuffer
)
4016 || ! EQ (current_buffer
->keymap
, okeymap
))
4018 /* But do it only if the caller is actually going to read events.
4019 Otherwise there's no need to make him wake up, and it could
4020 cause trouble (for example it would make Fsit_for return). */
4021 if (waiting_for_user_input_p
== -1)
4022 record_asynch_buffer_change ();
4024 unbind_to (count
, Qnil
);
4027 /* Report all recent events of a change in process status
4028 (either run the sentinel or output a message).
4029 This is done while Emacs is waiting for keyboard input. */
4034 register Lisp_Object proc
, buffer
;
4035 Lisp_Object tail
, msg
;
4036 struct gcpro gcpro1
, gcpro2
;
4040 /* We need to gcpro tail; if read_process_output calls a filter
4041 which deletes a process and removes the cons to which tail points
4042 from Vprocess_alist, and then causes a GC, tail is an unprotected
4046 /* Set this now, so that if new processes are created by sentinels
4047 that we run, we get called again to handle their status changes. */
4048 update_tick
= process_tick
;
4050 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
4053 register struct Lisp_Process
*p
;
4055 proc
= Fcdr (Fcar (tail
));
4056 p
= XPROCESS (proc
);
4058 if (XINT (p
->tick
) != XINT (p
->update_tick
))
4060 XSETINT (p
->update_tick
, XINT (p
->tick
));
4062 /* If process is still active, read any output that remains. */
4063 while (! EQ (p
->filter
, Qt
)
4064 && XINT (p
->infd
) >= 0
4065 && read_process_output (proc
, XINT (p
->infd
)) > 0);
4069 /* Get the text to use for the message. */
4070 if (!NILP (p
->raw_status_low
))
4072 msg
= status_message (p
->status
);
4074 /* If process is terminated, deactivate it or delete it. */
4076 if (CONSP (p
->status
))
4077 symbol
= XCONS (p
->status
)->car
;
4079 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
4080 || EQ (symbol
, Qclosed
))
4082 if (delete_exited_processes
)
4083 remove_process (proc
);
4085 deactivate_process (proc
);
4088 /* The actions above may have further incremented p->tick.
4089 So set p->update_tick again
4090 so that an error in the sentinel will not cause
4091 this code to be run again. */
4092 XSETINT (p
->update_tick
, XINT (p
->tick
));
4093 /* Now output the message suitably. */
4094 if (!NILP (p
->sentinel
))
4095 exec_sentinel (proc
, msg
);
4096 /* Don't bother with a message in the buffer
4097 when a process becomes runnable. */
4098 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
4100 Lisp_Object ro
, tem
;
4101 struct buffer
*old
= current_buffer
;
4105 ro
= XBUFFER (buffer
)->read_only
;
4107 /* Avoid error if buffer is deleted
4108 (probably that's why the process is dead, too) */
4109 if (NILP (XBUFFER (buffer
)->name
))
4111 Fset_buffer (buffer
);
4114 /* Insert new output into buffer
4115 at the current end-of-output marker,
4116 thus preserving logical ordering of input and output. */
4117 if (XMARKER (p
->mark
)->buffer
)
4118 SET_PT (marker_position (p
->mark
));
4124 tem
= current_buffer
->read_only
;
4125 current_buffer
->read_only
= Qnil
;
4126 insert_string ("\nProcess ");
4127 Finsert (1, &p
->name
);
4128 insert_string (" ");
4130 current_buffer
->read_only
= tem
;
4131 Fset_marker (p
->mark
, make_number (PT
), p
->buffer
);
4133 if (opoint
>= before
)
4134 SET_PT (opoint
+ (PT
- before
));
4138 set_buffer_internal (old
);
4143 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
4144 redisplay_preserve_echo_area ();
4150 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
4151 Sset_process_coding_system
, 1, 3, 0,
4152 "Set coding systems of PROCESS to DECODING (input from the process) and\n\
4153 ENCODING (output to the process).")
4154 (proc
, decoding
, encoding
)
4155 register Lisp_Object proc
, decoding
, encoding
;
4157 register struct Lisp_Process
*p
;
4159 CHECK_PROCESS (proc
, 0);
4160 p
= XPROCESS (proc
);
4161 if (XINT (p
->infd
) < 0)
4162 error ("Input file descriptor of %s closed", XSTRING (p
->name
)->data
);
4163 if (XINT (p
->outfd
) < 0)
4164 error ("Output file descriptor of %s closed", XSTRING (p
->name
)->data
);
4166 p
->decode_coding_system
= Fcheck_coding_system (decoding
);
4167 p
->encode_coding_system
= Fcheck_coding_system (encoding
);
4168 setup_coding_system (decoding
,
4169 proc_decode_coding_system
[XINT (p
->infd
)]);
4170 setup_coding_system (encoding
,
4171 proc_encode_coding_system
[XINT (p
->outfd
)]);
4176 DEFUN ("process-coding-system",
4177 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
4178 "Return a cons of coding systems for decoding and encoding of PROCESS.")
4180 register Lisp_Object proc
;
4182 CHECK_PROCESS (proc
, 0);
4183 return Fcons (XPROCESS (proc
)->decode_coding_system
,
4184 XPROCESS (proc
)->encode_coding_system
);
4187 /* The first time this is called, assume keyboard input comes from DESC
4188 instead of from where we used to expect it.
4189 Subsequent calls mean assume input keyboard can come from DESC
4190 in addition to other places. */
4192 static int add_keyboard_wait_descriptor_called_flag
;
4195 add_keyboard_wait_descriptor (desc
)
4198 if (! add_keyboard_wait_descriptor_called_flag
)
4199 FD_CLR (0, &input_wait_mask
);
4200 add_keyboard_wait_descriptor_called_flag
= 1;
4201 FD_SET (desc
, &input_wait_mask
);
4202 FD_SET (desc
, &non_process_wait_mask
);
4203 if (desc
> max_keyboard_desc
)
4204 max_keyboard_desc
= desc
;
4207 /* From now on, do not expect DESC to give keyboard input. */
4210 delete_keyboard_wait_descriptor (desc
)
4214 int lim
= max_keyboard_desc
;
4216 FD_CLR (desc
, &input_wait_mask
);
4217 FD_CLR (desc
, &non_process_wait_mask
);
4219 if (desc
== max_keyboard_desc
)
4220 for (fd
= 0; fd
< lim
; fd
++)
4221 if (FD_ISSET (fd
, &input_wait_mask
)
4222 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
4223 max_keyboard_desc
= fd
;
4226 /* Return nonzero if *MASK has a bit set
4227 that corresponds to one of the keyboard input descriptors. */
4230 keyboard_bit_set (mask
)
4235 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
4236 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
4237 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
4249 if (! noninteractive
|| initialized
)
4251 signal (SIGCHLD
, sigchld_handler
);
4254 FD_ZERO (&input_wait_mask
);
4255 FD_ZERO (&non_keyboard_wait_mask
);
4256 FD_ZERO (&non_process_wait_mask
);
4257 max_process_desc
= 0;
4259 FD_SET (0, &input_wait_mask
);
4261 Vprocess_alist
= Qnil
;
4262 for (i
= 0; i
< MAXDESC
; i
++)
4264 chan_process
[i
] = Qnil
;
4265 proc_buffered_char
[i
] = -1;
4267 bzero (proc_decode_coding_system
, sizeof proc_decode_coding_system
);
4268 bzero (proc_encode_coding_system
, sizeof proc_encode_coding_system
);
4273 Qprocessp
= intern ("processp");
4274 staticpro (&Qprocessp
);
4275 Qrun
= intern ("run");
4277 Qstop
= intern ("stop");
4279 Qsignal
= intern ("signal");
4280 staticpro (&Qsignal
);
4282 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
4285 Qexit = intern ("exit");
4286 staticpro (&Qexit); */
4288 Qopen
= intern ("open");
4290 Qclosed
= intern ("closed");
4291 staticpro (&Qclosed
);
4293 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
4294 staticpro (&Qlast_nonmenu_event
);
4296 staticpro (&Vprocess_alist
);
4298 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
4299 "*Non-nil means delete processes immediately when they exit.\n\
4300 nil means don't delete them until `list-processes' is run.");
4302 delete_exited_processes
= 1;
4304 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
4305 "Control type of device used to communicate with subprocesses.\n\
4306 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
4307 The value has no effect if the system has no ptys or if all ptys are busy:\n\
4308 then a pipe is used in any case.\n\
4309 The value takes effect when `start-process' is called.");
4310 Vprocess_connection_type
= Qt
;
4312 defsubr (&Sprocessp
);
4313 defsubr (&Sget_process
);
4314 defsubr (&Sget_buffer_process
);
4315 defsubr (&Sdelete_process
);
4316 defsubr (&Sprocess_status
);
4317 defsubr (&Sprocess_exit_status
);
4318 defsubr (&Sprocess_id
);
4319 defsubr (&Sprocess_name
);
4320 defsubr (&Sprocess_tty_name
);
4321 defsubr (&Sprocess_command
);
4322 defsubr (&Sset_process_buffer
);
4323 defsubr (&Sprocess_buffer
);
4324 defsubr (&Sprocess_mark
);
4325 defsubr (&Sset_process_filter
);
4326 defsubr (&Sprocess_filter
);
4327 defsubr (&Sset_process_sentinel
);
4328 defsubr (&Sprocess_sentinel
);
4329 defsubr (&Sset_process_window_size
);
4330 defsubr (&Sprocess_kill_without_query
);
4331 defsubr (&Sprocess_contact
);
4332 defsubr (&Slist_processes
);
4333 defsubr (&Sprocess_list
);
4334 defsubr (&Sstart_process
);
4336 defsubr (&Sopen_network_stream
);
4337 #endif /* HAVE_SOCKETS */
4338 defsubr (&Saccept_process_output
);
4339 defsubr (&Sprocess_send_region
);
4340 defsubr (&Sprocess_send_string
);
4341 defsubr (&Sinterrupt_process
);
4342 defsubr (&Skill_process
);
4343 defsubr (&Squit_process
);
4344 defsubr (&Sstop_process
);
4345 defsubr (&Scontinue_process
);
4346 defsubr (&Sprocess_send_eof
);
4347 defsubr (&Ssignal_process
);
4348 defsubr (&Swaiting_for_user_input_p
);
4349 /* defsubr (&Sprocess_connection); */
4350 defsubr (&Sset_process_coding_system
);
4351 defsubr (&Sprocess_coding_system
);
4355 #else /* not subprocesses */
4357 #include <sys/types.h>
4361 #include "systime.h"
4362 #include "termopts.h"
4363 #include "sysselect.h"
4365 extern int frame_garbaged
;
4367 extern EMACS_TIME
timer_check ();
4368 extern int timers_run
;
4370 /* As described above, except assuming that there are no subprocesses:
4372 Wait for timeout to elapse and/or keyboard input to be available.
4375 timeout in seconds, or
4376 zero for no limit, or
4377 -1 means gobble data immediately available but don't wait for any.
4379 read_kbd is a Lisp_Object:
4380 0 to ignore keyboard input, or
4381 1 to return when input is available, or
4382 -1 means caller will actually read the input, so don't throw to
4384 a cons cell, meaning wait until its car is non-nil
4385 (and gobble terminal input into the buffer if any arrives), or
4386 We know that read_kbd will never be a Lisp_Process, since
4387 `subprocesses' isn't defined.
4389 do_display != 0 means redisplay should be done to show subprocess
4390 output that arrives.
4392 Return true iff we received input from any process. */
4395 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
4396 int time_limit
, microsecs
;
4397 Lisp_Object read_kbd
;
4400 EMACS_TIME end_time
, timeout
;
4401 SELECT_TYPE waitchannels
;
4403 Lisp_Object
*wait_for_cell
= 0;
4405 /* If waiting for non-nil in a cell, record where. */
4406 if (CONSP (read_kbd
))
4408 wait_for_cell
= &XCONS (read_kbd
)->car
;
4409 XSETFASTINT (read_kbd
, 0);
4412 /* What does time_limit really mean? */
4413 if (time_limit
|| microsecs
)
4415 if (time_limit
== -1)
4416 /* In fact, it's zero. */
4417 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4419 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4421 /* How far in the future is that? */
4422 EMACS_GET_TIME (end_time
);
4423 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4426 /* It's infinite. */
4427 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4429 /* Turn off periodic alarms (in case they are in use)
4430 because the select emulator uses alarms. */
4436 int timeout_reduced_for_timers
= 0;
4438 /* If calling from keyboard input, do not quit
4439 since we want to return C-g as an input character.
4440 Otherwise, do pending quit if requested. */
4441 if (XINT (read_kbd
) >= 0)
4444 /* Exit now if the cell we're waiting for became non-nil. */
4445 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
4448 /* Compute time from now till when time limit is up */
4449 /* Exit if already run out */
4450 if (time_limit
> 0 || microsecs
)
4452 EMACS_GET_TIME (timeout
);
4453 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4454 if (EMACS_TIME_NEG_P (timeout
))
4458 /* If our caller will not immediately handle keyboard events,
4459 run timer events directly.
4460 (Callers that will immediately read keyboard events
4461 call timer_delay on their own.) */
4462 if (! wait_for_cell
)
4464 EMACS_TIME timer_delay
;
4468 old_timers_run
= timers_run
;
4469 timer_delay
= timer_check (1);
4470 if (timers_run
!= old_timers_run
&& do_display
)
4472 redisplay_preserve_echo_area ();
4473 /* We must retry, since a timer may have requeued itself
4474 and that could alter the time delay. */
4478 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4480 EMACS_TIME difference
;
4481 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4482 if (EMACS_TIME_NEG_P (difference
))
4484 timeout
= timer_delay
;
4485 timeout_reduced_for_timers
= 1;
4490 /* Cause C-g and alarm signals to take immediate action,
4491 and cause input available signals to zero out timeout. */
4492 if (XINT (read_kbd
) < 0)
4493 set_waiting_for_input (&timeout
);
4495 /* Wait till there is something to do. */
4497 if (! XINT (read_kbd
) && wait_for_cell
== 0)
4498 FD_ZERO (&waitchannels
);
4500 FD_SET (0, &waitchannels
);
4502 /* If a frame has been newly mapped and needs updating,
4503 reprocess its display stuff. */
4504 if (frame_garbaged
&& do_display
)
4506 clear_waiting_for_input ();
4507 redisplay_preserve_echo_area ();
4508 if (XINT (read_kbd
) < 0)
4509 set_waiting_for_input (&timeout
);
4512 if (XINT (read_kbd
) && detect_input_pending ())
4515 FD_ZERO (&waitchannels
);
4518 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
4523 /* Make C-g and alarm signals set flags again */
4524 clear_waiting_for_input ();
4526 /* If we woke up due to SIGWINCH, actually change size now. */
4527 do_pending_window_change ();
4529 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4530 /* We waited the full specified time, so return now. */
4535 /* If the system call was interrupted, then go around the
4537 if (xerrno
== EINTR
)
4538 FD_ZERO (&waitchannels
);
4540 error ("select error: %s", strerror (xerrno
));
4543 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
4544 /* System sometimes fails to deliver SIGIO. */
4545 kill (getpid (), SIGIO
);
4548 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
4549 kill (getpid (), SIGIO
);
4552 /* Check for keyboard input */
4554 if ((XINT (read_kbd
) != 0)
4555 && detect_input_pending_run_timers (do_display
))
4557 swallow_events (do_display
);
4558 if (detect_input_pending_run_timers (do_display
))
4562 /* If wait_for_cell. check for keyboard input
4563 but don't run any timers.
4564 ??? (It seems wrong to me to check for keyboard
4565 input at all when wait_for_cell, but the code
4566 has been this way since July 1994.
4567 Try changing this after version 19.31.) */
4569 && detect_input_pending ())
4571 swallow_events (do_display
);
4572 if (detect_input_pending ())
4576 /* Exit now if the cell we're waiting for became non-nil. */
4577 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
4587 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
4588 /* Don't confuse make-docfile by having two doc strings for this function.
4589 make-docfile does not pay attention to #if, for good reason! */
4592 register Lisp_Object name
;
4597 /* Kill all processes associated with `buffer'.
4598 If `buffer' is nil, kill all processes.
4599 Since we have no subprocesses, this does nothing. */
4601 kill_buffer_processes (buffer
)
4612 defsubr (&Sget_buffer_process
);
4616 #endif /* not subprocesses */