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 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1163 BUF_ZV (XBUFFER (buffer
)),
1164 BUF_ZV_BYTE (XBUFFER (buffer
)));
1166 if (!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
)
1167 || NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
))
1169 XPROCESS (proc
)->decode_coding_system
= Qnil
;
1170 XPROCESS (proc
)->encode_coding_system
= Qnil
;
1174 /* Setup coding systems for communicating with the process. */
1175 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1176 Lisp_Object coding_systems
= Qt
;
1177 Lisp_Object val
, *args2
;
1178 struct gcpro gcpro1
;
1180 if (!NILP (Vcoding_system_for_read
))
1181 val
= Vcoding_system_for_read
;
1182 else if (NILP (current_buffer
->enable_multibyte_characters
))
1186 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1187 args2
[0] = Qstart_process
;
1188 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1190 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1192 if (CONSP (coding_systems
))
1193 val
= XCONS (coding_systems
)->car
;
1194 else if (CONSP (Vdefault_process_coding_system
))
1195 val
= XCONS (Vdefault_process_coding_system
)->car
;
1199 XPROCESS (proc
)->decode_coding_system
= val
;
1201 if (!NILP (Vcoding_system_for_write
))
1202 val
= Vcoding_system_for_write
;
1203 else if (NILP (current_buffer
->enable_multibyte_characters
))
1207 if (EQ (coding_systems
, Qt
))
1209 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof args2
);
1210 args2
[0] = Qstart_process
;
1211 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1214 Ffind_operation_coding_system (nargs
+ 1, args2
);
1217 if (CONSP (coding_systems
))
1218 val
= XCONS (coding_systems
)->cdr
;
1219 else if (CONSP (Vdefault_process_coding_system
))
1220 val
= XCONS (Vdefault_process_coding_system
)->cdr
;
1224 XPROCESS (proc
)->encode_coding_system
= val
;
1227 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
1228 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
1230 create_process (proc
, (char **) new_argv
, current_dir
);
1232 return unbind_to (count
, proc
);
1235 /* This function is the unwind_protect form for Fstart_process. If
1236 PROC doesn't have its pid set, then we know someone has signaled
1237 an error and the process wasn't started successfully, so we should
1238 remove it from the process list. */
1240 start_process_unwind (proc
)
1243 if (!PROCESSP (proc
))
1246 /* Was PROC started successfully? */
1247 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1248 remove_process (proc
);
1255 create_process_1 (signo
)
1258 #if defined (USG) && !defined (POSIX_SIGNALS)
1259 /* USG systems forget handlers when they are used;
1260 must reestablish each time */
1261 signal (signo
, create_process_1
);
1265 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1268 /* Mimic blocking of signals on system V, which doesn't really have it. */
1270 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1271 int sigchld_deferred
;
1274 create_process_sigchld ()
1276 signal (SIGCHLD
, create_process_sigchld
);
1278 sigchld_deferred
= 1;
1284 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1286 create_process (process
, new_argv
, current_dir
)
1287 Lisp_Object process
;
1289 Lisp_Object current_dir
;
1291 int pid
, inchannel
, outchannel
;
1293 #ifdef POSIX_SIGNALS
1296 struct sigaction sigint_action
;
1297 struct sigaction sigquit_action
;
1299 struct sigaction sighup_action
;
1301 #else /* !POSIX_SIGNALS */
1303 SIGTYPE (*sigchld
)();
1305 #endif /* !POSIX_SIGNALS */
1306 /* Use volatile to protect variables from being clobbered by longjmp. */
1307 volatile int forkin
, forkout
;
1308 volatile int pty_flag
= 0;
1309 extern char **environ
;
1311 inchannel
= outchannel
= -1;
1314 if (!NILP (Vprocess_connection_type
))
1315 outchannel
= inchannel
= allocate_pty ();
1320 /* On USG systems it does not work to open the pty's tty here
1321 and then close and reopen it in the child. */
1323 /* Don't let this terminal become our controlling terminal
1324 (in case we don't have one). */
1325 forkout
= forkin
= open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1327 forkout
= forkin
= open (pty_name
, O_RDWR
, 0);
1330 report_file_error ("Opening pty", Qnil
);
1332 forkin
= forkout
= -1;
1333 #endif /* not USG */
1337 #endif /* HAVE_PTYS */
1340 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1341 report_file_error ("Opening socketpair", Qnil
);
1342 outchannel
= inchannel
= sv
[0];
1343 forkout
= forkin
= sv
[1];
1345 #else /* not SKTPAIR */
1354 #endif /* not SKTPAIR */
1357 /* Replaced by close_process_descs */
1358 set_exclusive_use (inchannel
);
1359 set_exclusive_use (outchannel
);
1362 /* Stride people say it's a mystery why this is needed
1363 as well as the O_NDELAY, but that it fails without this. */
1364 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1367 ioctl (inchannel
, FIONBIO
, &one
);
1372 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1373 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1376 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1377 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1381 /* Record this as an active process, with its channels.
1382 As a result, child_setup will close Emacs's side of the pipes. */
1383 chan_process
[inchannel
] = process
;
1384 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1385 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1386 /* Record the tty descriptor used in the subprocess. */
1388 XPROCESS (process
)->subtty
= Qnil
;
1390 XSETFASTINT (XPROCESS (process
)->subtty
, forkin
);
1391 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1392 XPROCESS (process
)->status
= Qrun
;
1393 if (!proc_decode_coding_system
[inchannel
])
1394 proc_decode_coding_system
[inchannel
]
1395 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
1396 setup_coding_system (XPROCESS (process
)->decode_coding_system
,
1397 proc_decode_coding_system
[inchannel
]);
1398 if (!proc_encode_coding_system
[outchannel
])
1399 proc_encode_coding_system
[outchannel
]
1400 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
1401 setup_coding_system (XPROCESS (process
)->encode_coding_system
,
1402 proc_encode_coding_system
[outchannel
]);
1404 if (CODING_REQUIRE_ENCODING (proc_encode_coding_system
[outchannel
]))
1406 /* Here we encode arguments by the coding system used for
1407 sending data to the process. We don't support using
1408 different coding systems for encoding arguments and for
1409 encoding data sent to the process. */
1410 struct gcpro gcpro1
;
1412 struct coding_system
*coding
= proc_encode_coding_system
[outchannel
];
1414 coding
->last_block
= 1;
1416 while (new_argv
[i
] != 0)
1418 int len
= strlen (new_argv
[i
]);
1419 int size
= encoding_buffer_size (coding
, len
);
1420 unsigned char *buf
= (unsigned char *) alloca (size
);
1423 produced
= encode_coding (coding
, new_argv
[i
], buf
, len
, size
, &dmy
);
1425 /* We don't have to free new_argv[i] because it points to a
1426 Lisp string given as an argument to `start-process'. */
1427 new_argv
[i
++] = buf
;
1430 coding
->last_block
= 0;
1433 /* Delay interrupts until we have a chance to store
1434 the new fork's pid in its process structure */
1435 #ifdef POSIX_SIGNALS
1436 sigemptyset (&blocked
);
1438 sigaddset (&blocked
, SIGCHLD
);
1441 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1442 this sets the parent's signal handlers as well as the child's.
1443 So delay all interrupts whose handlers the child might munge,
1444 and record the current handlers so they can be restored later. */
1445 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1446 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1448 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1450 #endif /* HAVE_VFORK */
1451 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1452 #else /* !POSIX_SIGNALS */
1456 #else /* not BSD4_1 */
1457 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1458 sigsetmask (sigmask (SIGCHLD
));
1459 #else /* ordinary USG */
1461 sigchld_deferred
= 0;
1462 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1464 #endif /* ordinary USG */
1465 #endif /* not BSD4_1 */
1466 #endif /* SIGCHLD */
1467 #endif /* !POSIX_SIGNALS */
1469 FD_SET (inchannel
, &input_wait_mask
);
1470 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1471 if (inchannel
> max_process_desc
)
1472 max_process_desc
= inchannel
;
1474 /* Until we store the proper pid, enable sigchld_handler
1475 to recognize an unknown pid as standing for this process.
1476 It is very important not to let this `marker' value stay
1477 in the table after this function has returned; if it does
1478 it might cause call-process to hang and subsequent asynchronous
1479 processes to get their return values scrambled. */
1480 XSETINT (XPROCESS (process
)->pid
, -1);
1485 /* child_setup must clobber environ on systems with true vfork.
1486 Protect it from permanent change. */
1487 char **save_environ
= environ
;
1490 = Fencode_coding_string (current_dir
, Vfile_name_coding_system
, Qt
);
1495 #endif /* not WINDOWSNT */
1497 int xforkin
= forkin
;
1498 int xforkout
= forkout
;
1500 #if 0 /* This was probably a mistake--it duplicates code later on,
1501 but fails to handle all the cases. */
1502 /* Make sure SIGCHLD is not blocked in the child. */
1503 sigsetmask (SIGEMPTYMASK
);
1506 /* Make the pty be the controlling terminal of the process. */
1508 /* First, disconnect its current controlling terminal. */
1510 /* We tried doing setsid only if pty_flag, but it caused
1511 process_set_signal to fail on SGI when using a pipe. */
1513 /* Make the pty's terminal the controlling terminal. */
1517 /* We ignore the return value
1518 because faith@cs.unc.edu says that is necessary on Linux. */
1519 ioctl (xforkin
, TIOCSCTTY
, 0);
1522 #else /* not HAVE_SETSID */
1524 /* It's very important to call setpgrp here and no time
1525 afterwards. Otherwise, we lose our controlling tty which
1526 is set when we open the pty. */
1529 #endif /* not HAVE_SETSID */
1530 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1531 if (pty_flag
&& xforkin
>= 0)
1534 tcgetattr (xforkin
, &t
);
1536 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1537 write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1540 #if defined (NTTYDISC) && defined (TIOCSETD)
1541 if (pty_flag
&& xforkin
>= 0)
1543 /* Use new line discipline. */
1544 int ldisc
= NTTYDISC
;
1545 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1550 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1551 can do TIOCSPGRP only to the process's controlling tty. */
1554 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1555 I can't test it since I don't have 4.3. */
1556 int j
= open ("/dev/tty", O_RDWR
, 0);
1557 ioctl (j
, TIOCNOTTY
, 0);
1560 /* In order to get a controlling terminal on some versions
1561 of BSD, it is necessary to put the process in pgrp 0
1562 before it opens the terminal. */
1570 #endif /* TIOCNOTTY */
1572 #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY)
1573 /*** There is a suggestion that this ought to be a
1574 conditional on TIOCSPGRP,
1575 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1576 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1577 that system does seem to need this code, even though
1578 both HAVE_SETSID and TIOCSCTTY are defined. */
1579 /* Now close the pty (if we had it open) and reopen it.
1580 This makes the pty the controlling terminal of the subprocess. */
1583 #ifdef SET_CHILD_PTY_PGRP
1584 int pgrp
= getpid ();
1587 /* I wonder if close (open (pty_name, ...)) would work? */
1590 xforkout
= xforkin
= open (pty_name
, O_RDWR
, 0);
1594 write (1, "Couldn't open the pty terminal ", 31);
1595 write (1, pty_name
, strlen (pty_name
));
1600 #ifdef SET_CHILD_PTY_PGRP
1601 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1602 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1605 #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */
1607 #ifdef SETUP_SLAVE_PTY
1612 #endif /* SETUP_SLAVE_PTY */
1614 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1615 Now reenable it in the child, so it will die when we want it to. */
1617 signal (SIGHUP
, SIG_DFL
);
1619 #endif /* HAVE_PTYS */
1621 signal (SIGINT
, SIG_DFL
);
1622 signal (SIGQUIT
, SIG_DFL
);
1624 /* Stop blocking signals in the child. */
1625 #ifdef POSIX_SIGNALS
1626 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1627 #else /* !POSIX_SIGNALS */
1631 #else /* not BSD4_1 */
1632 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1633 sigsetmask (SIGEMPTYMASK
);
1634 #else /* ordinary USG */
1636 signal (SIGCHLD
, sigchld
);
1638 #endif /* ordinary USG */
1639 #endif /* not BSD4_1 */
1640 #endif /* SIGCHLD */
1641 #endif /* !POSIX_SIGNALS */
1644 child_setup_tty (xforkout
);
1646 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1647 new_argv
, 1, current_dir
);
1648 #else /* not WINDOWSNT */
1649 child_setup (xforkin
, xforkout
, xforkout
,
1650 new_argv
, 1, current_dir
);
1651 #endif /* not WINDOWSNT */
1653 environ
= save_environ
;
1658 /* This runs in the Emacs process. */
1663 if (forkin
!= forkout
&& forkout
>= 0)
1668 /* vfork succeeded. */
1669 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
1672 register_child (pid
, inchannel
);
1673 #endif /* WINDOWSNT */
1675 /* If the subfork execv fails, and it exits,
1676 this close hangs. I don't know why.
1677 So have an interrupt jar it loose. */
1679 signal (SIGALRM
, create_process_1
);
1681 XPROCESS (process
)->subtty
= Qnil
;
1686 if (forkin
!= forkout
&& forkout
>= 0)
1691 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1694 XPROCESS (process
)->tty_name
= Qnil
;
1697 /* Restore the signal state whether vfork succeeded or not.
1698 (We will signal an error, below, if it failed.) */
1699 #ifdef POSIX_SIGNALS
1701 /* Restore the parent's signal handlers. */
1702 sigaction (SIGINT
, &sigint_action
, 0);
1703 sigaction (SIGQUIT
, &sigquit_action
, 0);
1705 sigaction (SIGHUP
, &sighup_action
, 0);
1707 #endif /* HAVE_VFORK */
1708 /* Stop blocking signals in the parent. */
1709 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1710 #else /* !POSIX_SIGNALS */
1714 #else /* not BSD4_1 */
1715 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1716 sigsetmask (SIGEMPTYMASK
);
1717 #else /* ordinary USG */
1719 signal (SIGCHLD
, sigchld
);
1720 /* Now really handle any of these signals
1721 that came in during this function. */
1722 if (sigchld_deferred
)
1723 kill (getpid (), SIGCHLD
);
1725 #endif /* ordinary USG */
1726 #endif /* not BSD4_1 */
1727 #endif /* SIGCHLD */
1728 #endif /* !POSIX_SIGNALS */
1730 /* Now generate the error if vfork failed. */
1732 report_file_error ("Doing vfork", Qnil
);
1734 #endif /* not VMS */
1738 /* open a TCP network connection to a given HOST/SERVICE. Treated
1739 exactly like a normal process when reading and writing. Only
1740 differences are in status display and process deletion. A network
1741 connection has no PID; you cannot signal it. All you can do is
1742 deactivate and close it via delete-process */
1744 DEFUN ("open-network-stream", Fopen_network_stream
, Sopen_network_stream
,
1746 "Open a TCP connection for a service to a host.\n\
1747 Returns a subprocess-object to represent the connection.\n\
1748 Input and output work as for subprocesses; `delete-process' closes it.\n\
1749 Args are NAME BUFFER HOST SERVICE.\n\
1750 NAME is name for process. It is modified if necessary to make it unique.\n\
1751 BUFFER is the buffer (or buffer-name) to associate with the process.\n\
1752 Process output goes at end of that buffer, unless you specify\n\
1753 an output stream or filter function to handle the output.\n\
1754 BUFFER may be also nil, meaning that this process is not associated\n\
1756 Third arg is name of the host to connect to, or its IP address.\n\
1757 Fourth arg SERVICE is name of the service desired, or an integer\n\
1758 specifying a port number to connect to.")
1759 (name
, buffer
, host
, service
)
1760 Lisp_Object name
, buffer
, host
, service
;
1764 struct sockaddr_in address
;
1765 struct servent
*svc_info
;
1766 struct hostent
*host_info_ptr
, host_info
;
1767 char *(addr_list
[2]);
1768 IN_ADDR numeric_addr
;
1772 struct hostent host_info_fixed
;
1773 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1775 int count
= specpdl_ptr
- specpdl
;
1778 /* Ensure socket support is loaded if available. */
1779 init_winsock (TRUE
);
1782 GCPRO4 (name
, buffer
, host
, service
);
1783 CHECK_STRING (name
, 0);
1784 CHECK_STRING (host
, 0);
1785 if (INTEGERP (service
))
1786 port
= htons ((unsigned short) XINT (service
));
1789 CHECK_STRING (service
, 0);
1790 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
1792 error ("Unknown service \"%s\"", XSTRING (service
)->data
);
1793 port
= svc_info
->s_port
;
1796 /* Slow down polling to every ten seconds.
1797 Some kernels have a bug which causes retrying connect to fail
1798 after a connect. Polling can interfere with gethostbyname too. */
1799 #ifdef POLL_FOR_INPUT
1800 bind_polling_period (10);
1811 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
1814 if (! (host_info_ptr
== 0 && h_errno
== TRY_AGAIN
))
1817 Fsleep_for (make_number (1), Qnil
);
1819 if (host_info_ptr
== 0)
1820 /* Attempt to interpret host as numeric inet address */
1822 numeric_addr
= inet_addr ((char *) XSTRING (host
)->data
);
1823 if (NUMERIC_ADDR_ERROR
)
1824 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
1826 host_info_ptr
= &host_info
;
1827 host_info
.h_name
= 0;
1828 host_info
.h_aliases
= 0;
1829 host_info
.h_addrtype
= AF_INET
;
1831 /* Older machines have only one address slot called h_addr.
1832 Newer machines have h_addr_list, but #define h_addr to
1833 be its first element. */
1834 host_info
.h_addr_list
= &(addr_list
[0]);
1836 host_info
.h_addr
= (char*)(&numeric_addr
);
1838 /* numeric_addr isn't null-terminated; it has fixed length. */
1839 host_info
.h_length
= sizeof (numeric_addr
);
1842 bzero (&address
, sizeof address
);
1843 bcopy (host_info_ptr
->h_addr
, (char *) &address
.sin_addr
,
1844 host_info_ptr
->h_length
);
1845 address
.sin_family
= host_info_ptr
->h_addrtype
;
1846 address
.sin_port
= port
;
1848 s
= socket (host_info_ptr
->h_addrtype
, SOCK_STREAM
, 0);
1850 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1852 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
1853 when connect is interrupted. So let's not let it get interrupted.
1854 Note we do not turn off polling, because polling is only used
1855 when not interrupt_input, and thus not normally used on the systems
1856 which have this bug. On systems which use polling, there's no way
1857 to quit if polling is turned off. */
1858 if (interrupt_input
)
1866 if (connect (s
, (struct sockaddr
*) &address
, sizeof address
) == -1
1867 && errno
!= EISCONN
)
1875 if (errno
== EADDRINUSE
&& retry
< 20)
1877 /* A delay here is needed on some FreeBSD systems,
1878 and it is harmless, since this retrying takes time anyway
1879 and should be infrequent. */
1880 Fsleep_for (make_number (1), Qnil
);
1887 if (interrupt_input
)
1891 report_file_error ("connection failed",
1892 Fcons (host
, Fcons (name
, Qnil
)));
1897 #ifdef POLL_FOR_INPUT
1898 unbind_to (count
, Qnil
);
1901 if (interrupt_input
)
1905 s
= connect_server (0);
1907 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1908 send_command (s
, C_PORT
, 0, "%s:%d", XSTRING (host
)->data
, ntohs (port
));
1909 send_command (s
, C_DUMB
, 1, 0);
1916 buffer
= Fget_buffer_create (buffer
);
1917 proc
= make_process (name
);
1919 chan_process
[inch
] = proc
;
1922 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
1925 fcntl (inch
, F_SETFL
, O_NDELAY
);
1929 XPROCESS (proc
)->childp
= Fcons (host
, Fcons (service
, Qnil
));
1930 XPROCESS (proc
)->command_channel_p
= Qnil
;
1931 XPROCESS (proc
)->buffer
= buffer
;
1932 XPROCESS (proc
)->sentinel
= Qnil
;
1933 XPROCESS (proc
)->filter
= Qnil
;
1934 XPROCESS (proc
)->command
= Qnil
;
1935 XPROCESS (proc
)->pid
= Qnil
;
1936 XSETINT (XPROCESS (proc
)->infd
, inch
);
1937 XSETINT (XPROCESS (proc
)->outfd
, outch
);
1938 XPROCESS (proc
)->status
= Qrun
;
1939 FD_SET (inch
, &input_wait_mask
);
1940 FD_SET (inch
, &non_keyboard_wait_mask
);
1941 if (inch
> max_process_desc
)
1942 max_process_desc
= inch
;
1944 if (!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
)
1945 || NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
))
1947 XPROCESS (proc
)->decode_coding_system
= Qnil
;
1948 XPROCESS (proc
)->encode_coding_system
= Qnil
;
1952 /* Setup coding systems for communicating with the network stream. */
1953 struct gcpro gcpro1
;
1954 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1955 Lisp_Object coding_systems
= Qt
;
1956 Lisp_Object args
[5], val
;
1958 if (!NILP (Vcoding_system_for_read
))
1959 val
= Vcoding_system_for_read
;
1960 else if (NILP (current_buffer
->enable_multibyte_characters
))
1961 /* We dare not decode end-of-line format by setting VAL to
1962 Qemacs_mule, because the existing Emacs Lisp libraries
1963 assume that they receive bare code including a sequene of
1968 args
[0] = Qopen_network_stream
, args
[1] = name
,
1969 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
1971 coding_systems
= Ffind_operation_coding_system (5, args
);
1973 if (CONSP (coding_systems
))
1974 val
= XCONS (coding_systems
)->car
;
1975 else if (CONSP (Vdefault_process_coding_system
))
1976 val
= XCONS (Vdefault_process_coding_system
)->car
;
1980 XPROCESS (proc
)->decode_coding_system
= val
;
1982 if (!NILP (Vcoding_system_for_write
))
1983 val
= Vcoding_system_for_write
;
1984 else if (NILP (current_buffer
->enable_multibyte_characters
))
1988 if (EQ (coding_systems
, Qt
))
1990 args
[0] = Qopen_network_stream
, args
[1] = name
,
1991 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
1993 coding_systems
= Ffind_operation_coding_system (5, args
);
1996 if (CONSP (coding_systems
))
1997 val
= XCONS (coding_systems
)->cdr
;
1998 else if (CONSP (Vdefault_process_coding_system
))
1999 val
= XCONS (Vdefault_process_coding_system
)->cdr
;
2003 XPROCESS (proc
)->encode_coding_system
= val
;
2006 if (!proc_decode_coding_system
[inch
])
2007 proc_decode_coding_system
[inch
]
2008 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
2009 setup_coding_system (XPROCESS (proc
)->decode_coding_system
,
2010 proc_decode_coding_system
[inch
]);
2011 if (!proc_encode_coding_system
[outch
])
2012 proc_encode_coding_system
[outch
]
2013 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
2014 setup_coding_system (XPROCESS (proc
)->encode_coding_system
,
2015 proc_encode_coding_system
[outch
]);
2017 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
2018 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
2023 #endif /* HAVE_SOCKETS */
2026 deactivate_process (proc
)
2029 register int inchannel
, outchannel
;
2030 register struct Lisp_Process
*p
= XPROCESS (proc
);
2032 inchannel
= XINT (p
->infd
);
2033 outchannel
= XINT (p
->outfd
);
2037 /* Beware SIGCHLD hereabouts. */
2038 flush_pending_output (inchannel
);
2041 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
2042 sys$
dassgn (outchannel
);
2043 vs
= get_vms_process_pointer (p
->pid
);
2045 give_back_vms_process_stuff (vs
);
2049 if (outchannel
>= 0 && outchannel
!= inchannel
)
2053 XSETINT (p
->infd
, -1);
2054 XSETINT (p
->outfd
, -1);
2055 chan_process
[inchannel
] = Qnil
;
2056 FD_CLR (inchannel
, &input_wait_mask
);
2057 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
2058 if (inchannel
== max_process_desc
)
2061 /* We just closed the highest-numbered process input descriptor,
2062 so recompute the highest-numbered one now. */
2063 max_process_desc
= 0;
2064 for (i
= 0; i
< MAXDESC
; i
++)
2065 if (!NILP (chan_process
[i
]))
2066 max_process_desc
= i
;
2071 /* Close all descriptors currently in use for communication
2072 with subprocess. This is used in a newly-forked subprocess
2073 to get rid of irrelevant descriptors. */
2076 close_process_descs ()
2080 for (i
= 0; i
< MAXDESC
; i
++)
2082 Lisp_Object process
;
2083 process
= chan_process
[i
];
2084 if (!NILP (process
))
2086 int in
= XINT (XPROCESS (process
)->infd
);
2087 int out
= XINT (XPROCESS (process
)->outfd
);
2090 if (out
>= 0 && in
!= out
)
2097 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
2099 "Allow any pending output from subprocesses to be read by Emacs.\n\
2100 It is read into the process' buffers or given to their filter functions.\n\
2101 Non-nil arg PROCESS means do not return until some output has been received\n\
2103 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
2104 seconds and microseconds to wait; return after that much time whether\n\
2105 or not there is input.\n\
2106 Return non-nil iff we received any output before the timeout expired.")
2107 (process
, timeout
, timeout_msecs
)
2108 register Lisp_Object process
, timeout
, timeout_msecs
;
2113 if (! NILP (timeout_msecs
))
2115 CHECK_NUMBER (timeout_msecs
, 2);
2116 useconds
= XINT (timeout_msecs
);
2117 if (!INTEGERP (timeout
))
2118 XSETINT (timeout
, 0);
2121 int carry
= useconds
/ 1000000;
2123 XSETINT (timeout
, XINT (timeout
) + carry
);
2124 useconds
-= carry
* 1000000;
2126 /* I think this clause is necessary because C doesn't
2127 guarantee a particular rounding direction for negative
2131 XSETINT (timeout
, XINT (timeout
) - 1);
2132 useconds
+= 1000000;
2139 if (! NILP (timeout
))
2141 CHECK_NUMBER (timeout
, 1);
2142 seconds
= XINT (timeout
);
2143 if (seconds
< 0 || (seconds
== 0 && useconds
== 0))
2155 XSETFASTINT (process
, 0);
2158 (wait_reading_process_input (seconds
, useconds
, process
, 0)
2162 /* This variable is different from waiting_for_input in keyboard.c.
2163 It is used to communicate to a lisp process-filter/sentinel (via the
2164 function Fwaiting_for_user_input_p below) whether emacs was waiting
2165 for user-input when that process-filter was called.
2166 waiting_for_input cannot be used as that is by definition 0 when
2167 lisp code is being evalled.
2168 This is also used in record_asynch_buffer_change.
2169 For that purpose, this must be 0
2170 when not inside wait_reading_process_input. */
2171 static int waiting_for_user_input_p
;
2173 /* This is here so breakpoints can be put on it. */
2175 wait_reading_process_input_1 ()
2179 /* Read and dispose of subprocess output while waiting for timeout to
2180 elapse and/or keyboard input to be available.
2183 timeout in seconds, or
2184 zero for no limit, or
2185 -1 means gobble data immediately available but don't wait for any.
2188 an additional duration to wait, measured in microseconds.
2189 If this is nonzero and time_limit is 0, then the timeout
2190 consists of MICROSECS only.
2192 READ_KBD is a lisp value:
2193 0 to ignore keyboard input, or
2194 1 to return when input is available, or
2195 -1 meaning caller will actually read the input, so don't throw to
2196 the quit handler, or
2197 a cons cell, meaning wait until its car is non-nil
2198 (and gobble terminal input into the buffer if any arrives), or
2199 a process object, meaning wait until something arrives from that
2200 process. The return value is true iff we read some input from
2203 DO_DISPLAY != 0 means redisplay should be done to show subprocess
2204 output that arrives.
2206 If READ_KBD is a pointer to a struct Lisp_Process, then the
2207 function returns true iff we received input from that process
2208 before the timeout elapsed.
2209 Otherwise, return true iff we received input from any process. */
2211 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
2212 int time_limit
, microsecs
;
2213 Lisp_Object read_kbd
;
2216 register int channel
, nfds
, m
;
2217 static SELECT_TYPE Available
;
2220 EMACS_TIME timeout
, end_time
, garbage
;
2222 int wait_channel
= -1;
2223 struct Lisp_Process
*wait_proc
= 0;
2224 int got_some_input
= 0;
2225 Lisp_Object
*wait_for_cell
= 0;
2227 FD_ZERO (&Available
);
2229 /* If read_kbd is a process to watch, set wait_proc and wait_channel
2231 if (PROCESSP (read_kbd
))
2233 wait_proc
= XPROCESS (read_kbd
);
2234 wait_channel
= XINT (wait_proc
->infd
);
2235 XSETFASTINT (read_kbd
, 0);
2238 /* If waiting for non-nil in a cell, record where. */
2239 if (CONSP (read_kbd
))
2241 wait_for_cell
= &XCONS (read_kbd
)->car
;
2242 XSETFASTINT (read_kbd
, 0);
2245 waiting_for_user_input_p
= XINT (read_kbd
);
2247 /* Since we may need to wait several times,
2248 compute the absolute time to return at. */
2249 if (time_limit
|| microsecs
)
2251 EMACS_GET_TIME (end_time
);
2252 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
2253 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
2256 /* AlainF 5-Jul-1996
2257 HP-UX 10.10 seem to have problems with signals coming in
2258 Causes "poll: interrupted system call" messages when Emacs is run
2260 Turn off periodic alarms (in case they are in use) */
2266 int timeout_reduced_for_timers
= 0;
2268 /* If calling from keyboard input, do not quit
2269 since we want to return C-g as an input character.
2270 Otherwise, do pending quit if requested. */
2271 if (XINT (read_kbd
) >= 0)
2274 /* Exit now if the cell we're waiting for became non-nil. */
2275 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2278 /* Compute time from now till when time limit is up */
2279 /* Exit if already run out */
2280 if (time_limit
== -1)
2282 /* -1 specified for timeout means
2283 gobble output available now
2284 but don't wait at all. */
2286 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2288 else if (time_limit
|| microsecs
)
2290 EMACS_GET_TIME (timeout
);
2291 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
2292 if (EMACS_TIME_NEG_P (timeout
))
2297 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
2300 /* Normally we run timers here.
2301 But not if wait_for_cell; in those cases,
2302 the wait is supposed to be short,
2303 and those callers cannot handle running arbitrary Lisp code here. */
2304 if (! wait_for_cell
)
2306 EMACS_TIME timer_delay
;
2310 old_timers_run
= timers_run
;
2311 timer_delay
= timer_check (1);
2312 if (timers_run
!= old_timers_run
&& do_display
)
2314 redisplay_preserve_echo_area ();
2315 /* We must retry, since a timer may have requeued itself
2316 and that could alter the time_delay. */
2320 /* If there is unread keyboard input, also return. */
2321 if (XINT (read_kbd
) != 0
2322 && requeued_events_pending_p ())
2325 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
2327 EMACS_TIME difference
;
2328 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
2329 if (EMACS_TIME_NEG_P (difference
))
2331 timeout
= timer_delay
;
2332 timeout_reduced_for_timers
= 1;
2335 /* If time_limit is -1, we are not going to wait at all. */
2336 else if (time_limit
!= -1)
2338 /* This is so a breakpoint can be put here. */
2339 wait_reading_process_input_1 ();
2343 /* Cause C-g and alarm signals to take immediate action,
2344 and cause input available signals to zero out timeout.
2346 It is important that we do this before checking for process
2347 activity. If we get a SIGCHLD after the explicit checks for
2348 process activity, timeout is the only way we will know. */
2349 if (XINT (read_kbd
) < 0)
2350 set_waiting_for_input (&timeout
);
2352 /* If status of something has changed, and no input is
2353 available, notify the user of the change right away. After
2354 this explicit check, we'll let the SIGCHLD handler zap
2355 timeout to get our attention. */
2356 if (update_tick
!= process_tick
&& do_display
)
2358 Atemp
= input_wait_mask
;
2359 EMACS_SET_SECS_USECS (timeout
, 0, 0);
2360 if ((select (max (max_process_desc
, max_keyboard_desc
) + 1,
2361 &Atemp
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2365 /* It's okay for us to do this and then continue with
2366 the loop, since timeout has already been zeroed out. */
2367 clear_waiting_for_input ();
2372 /* Don't wait for output from a non-running process. */
2373 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
2374 update_status (wait_proc
);
2376 && ! EQ (wait_proc
->status
, Qrun
))
2378 int nread
, total_nread
= 0;
2380 clear_waiting_for_input ();
2381 XSETPROCESS (proc
, wait_proc
);
2383 /* Read data from the process, until we exhaust it. */
2384 while (XINT (wait_proc
->infd
) >= 0
2386 = read_process_output (proc
, XINT (wait_proc
->infd
))))
2389 total_nread
+= nread
;
2391 else if (nread
== -1 && EIO
== errno
)
2395 if (total_nread
> 0 && do_display
)
2396 redisplay_preserve_echo_area ();
2401 /* Wait till there is something to do */
2404 Available
= non_process_wait_mask
;
2405 else if (! XINT (read_kbd
))
2406 Available
= non_keyboard_wait_mask
;
2408 Available
= input_wait_mask
;
2410 /* If frame size has changed or the window is newly mapped,
2411 redisplay now, before we start to wait. There is a race
2412 condition here; if a SIGIO arrives between now and the select
2413 and indicates that a frame is trashed, the select may block
2414 displaying a trashed screen. */
2415 if (frame_garbaged
&& do_display
)
2417 clear_waiting_for_input ();
2418 redisplay_preserve_echo_area ();
2419 if (XINT (read_kbd
) < 0)
2420 set_waiting_for_input (&timeout
);
2423 if (XINT (read_kbd
) && detect_input_pending ())
2426 FD_ZERO (&Available
);
2429 nfds
= select (max (max_process_desc
, max_keyboard_desc
) + 1,
2430 &Available
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
2435 /* Make C-g and alarm signals set flags again */
2436 clear_waiting_for_input ();
2438 /* If we woke up due to SIGWINCH, actually change size now. */
2439 do_pending_window_change ();
2441 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
2442 /* We wanted the full specified time, so return now. */
2446 if (xerrno
== EINTR
)
2447 FD_ZERO (&Available
);
2449 /* Ultrix select seems to return ENOMEM when it is
2450 interrupted. Treat it just like EINTR. Bleah. Note
2451 that we want to test for the "ultrix" CPP symbol, not
2452 "__ultrix__"; the latter is only defined under GCC, but
2453 not by DEC's bundled CC. -JimB */
2454 else if (xerrno
== ENOMEM
)
2455 FD_ZERO (&Available
);
2458 /* This happens for no known reason on ALLIANT.
2459 I am guessing that this is the right response. -- RMS. */
2460 else if (xerrno
== EFAULT
)
2461 FD_ZERO (&Available
);
2463 else if (xerrno
== EBADF
)
2466 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
2467 the child's closure of the pts gives the parent a SIGHUP, and
2468 the ptc file descriptor is automatically closed,
2469 yielding EBADF here or at select() call above.
2470 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
2471 in m/ibmrt-aix.h), and here we just ignore the select error.
2472 Cleanup occurs c/o status_notify after SIGCLD. */
2473 FD_ZERO (&Available
); /* Cannot depend on values returned */
2479 error ("select error: %s", strerror (xerrno
));
2481 #if defined(sun) && !defined(USG5_4)
2482 else if (nfds
> 0 && keyboard_bit_set (&Available
)
2484 /* System sometimes fails to deliver SIGIO.
2486 David J. Mackenzie says that Emacs doesn't compile under
2487 Solaris if this code is enabled, thus the USG5_4 in the CPP
2488 conditional. "I haven't noticed any ill effects so far.
2489 If you find a Solaris expert somewhere, they might know
2491 kill (getpid (), SIGIO
);
2494 #if 0 /* When polling is used, interrupt_input is 0,
2495 so get_input_pending should read the input.
2496 So this should not be needed. */
2497 /* If we are using polling for input,
2498 and we see input available, make it get read now.
2499 Otherwise it might not actually get read for a second.
2500 And on hpux, since we turn off polling in wait_reading_process_input,
2501 it might never get read at all if we don't spend much time
2502 outside of wait_reading_process_input. */
2503 if (XINT (read_kbd
) && interrupt_input
2504 && keyboard_bit_set (&Available
)
2505 && input_polling_used ())
2506 kill (getpid (), SIGALRM
);
2509 /* Check for keyboard input */
2510 /* If there is any, return immediately
2511 to give it higher priority than subprocesses */
2513 if (XINT (read_kbd
) != 0
2514 && detect_input_pending_run_timers (do_display
))
2516 swallow_events (do_display
);
2517 if (detect_input_pending_run_timers (do_display
))
2521 /* If there is unread keyboard input, also return. */
2522 if (XINT (read_kbd
) != 0
2523 && requeued_events_pending_p ())
2526 /* If we are not checking for keyboard input now,
2527 do process events (but don't run any timers).
2528 This is so that X events will be processed.
2529 Otherwise they may have to wait until polling takes place.
2530 That would causes delays in pasting selections, for example.
2532 (We used to do this only if wait_for_cell.) */
2533 if (XINT (read_kbd
) == 0 && detect_input_pending ())
2535 swallow_events (do_display
);
2536 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
2537 if (detect_input_pending ())
2542 /* Exit now if the cell we're waiting for became non-nil. */
2543 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2547 /* If we think we have keyboard input waiting, but didn't get SIGIO,
2548 go read it. This can happen with X on BSD after logging out.
2549 In that case, there really is no input and no SIGIO,
2550 but select says there is input. */
2552 if (XINT (read_kbd
) && interrupt_input
2553 && keyboard_bit_set (&Available
))
2554 kill (getpid (), SIGIO
);
2558 got_some_input
|= nfds
> 0;
2560 /* If checking input just got us a size-change event from X,
2561 obey it now if we should. */
2562 if (XINT (read_kbd
) || wait_for_cell
)
2563 do_pending_window_change ();
2565 /* Check for data from a process. */
2566 /* Really FIRST_PROC_DESC should be 0 on Unix,
2567 but this is safer in the short run. */
2568 for (channel
= 0; channel
<= max_process_desc
; channel
++)
2570 if (FD_ISSET (channel
, &Available
)
2571 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
2575 /* If waiting for this channel, arrange to return as
2576 soon as no more input to be processed. No more
2578 if (wait_channel
== channel
)
2584 proc
= chan_process
[channel
];
2588 /* Read data from the process, starting with our
2589 buffered-ahead character if we have one. */
2591 nread
= read_process_output (proc
, channel
);
2594 /* Since read_process_output can run a filter,
2595 which can call accept-process-output,
2596 don't try to read from any other processes
2597 before doing the select again. */
2598 FD_ZERO (&Available
);
2601 redisplay_preserve_echo_area ();
2604 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2607 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
2608 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
2610 else if (nread
== -1 && errno
== EAGAIN
)
2614 else if (nread
== -1 && errno
== EAGAIN
)
2616 /* Note that we cannot distinguish between no input
2617 available now and a closed pipe.
2618 With luck, a closed pipe will be accompanied by
2619 subprocess termination and SIGCHLD. */
2620 else if (nread
== 0 && !NETCONN_P (proc
))
2622 #endif /* O_NDELAY */
2623 #endif /* O_NONBLOCK */
2625 /* On some OSs with ptys, when the process on one end of
2626 a pty exits, the other end gets an error reading with
2627 errno = EIO instead of getting an EOF (0 bytes read).
2628 Therefore, if we get an error reading and errno =
2629 EIO, just continue, because the child process has
2630 exited and should clean itself up soon (e.g. when we
2632 else if (nread
== -1 && errno
== EIO
)
2634 #endif /* HAVE_PTYS */
2635 /* If we can detect process termination, don't consider the process
2636 gone just because its pipe is closed. */
2638 else if (nread
== 0 && !NETCONN_P (proc
))
2643 /* Preserve status of processes already terminated. */
2644 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2645 deactivate_process (proc
);
2646 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2647 update_status (XPROCESS (proc
));
2648 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2649 XPROCESS (proc
)->status
2650 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2653 } /* end for each file descriptor */
2654 } /* end while exit conditions not met */
2656 waiting_for_user_input_p
= 0;
2658 /* If calling from keyboard input, do not quit
2659 since we want to return C-g as an input character.
2660 Otherwise, do pending quit if requested. */
2661 if (XINT (read_kbd
) >= 0)
2663 /* Prevent input_pending from remaining set if we quit. */
2664 clear_input_pending ();
2668 /* AlainF 5-Jul-1996
2669 HP-UX 10.10 seems to have problems with signals coming in
2670 Causes "poll: interrupted system call" messages when Emacs is run
2672 Turn periodic alarms back on */
2676 return got_some_input
;
2679 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
2682 read_process_output_call (fun_and_args
)
2683 Lisp_Object fun_and_args
;
2685 return apply1 (XCONS (fun_and_args
)->car
, XCONS (fun_and_args
)->cdr
);
2689 read_process_output_error_handler (error
)
2692 cmd_error_internal (error
, "error in process filter: ");
2694 update_echo_area ();
2695 Fsleep_for (make_number (2), Qnil
);
2698 /* Read pending output from the process channel,
2699 starting with our buffered-ahead character if we have one.
2700 Yield number of decoded characters read.
2702 This function reads at most 1024 characters.
2703 If you want to read all available subprocess output,
2704 you must call it repeatedly until it returns zero.
2706 The characters read are decoded according to PROC's coding-system
2709 read_process_output (proc
, channel
)
2711 register int channel
;
2713 register int nchars
;
2716 int chars_allocated
= 0; /* If 1, `chars' should be freed later. */
2720 register Lisp_Object outstream
;
2721 register struct buffer
*old
= current_buffer
;
2722 register struct Lisp_Process
*p
= XPROCESS (proc
);
2723 register int opoint
;
2724 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
2725 int chars_in_decoding_buf
= 0; /* If 1, `chars' points
2726 XSTRING (p->decoding_buf)->data. */
2729 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2731 vs
= get_vms_process_pointer (p
->pid
);
2735 return(0); /* Really weird if it does this */
2736 if (!(vs
->iosb
[0] & 1))
2737 return -1; /* I/O error */
2740 error ("Could not get VMS process pointer");
2741 chars
= vs
->inputBuffer
;
2742 nchars
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2745 start_vms_process_read (vs
); /* Crank up the next read on the process */
2746 return 1; /* Nothing worth printing, say we got 1 */
2748 if (coding
->carryover_size
)
2750 /* The data carried over in the previous decoding should be
2751 prepended to the new data read to decode all together. */
2752 char *buf
= (char *) xmalloc (nchars
+ coding
->carryover_size
);
2754 bcopy (coding
->carryover
, buf
, coding
->carryover_size
);
2755 bcopy (chars
, buf
+ coding
->carryover_size
, nchars
);
2757 chars_allocated
= 1;
2761 if (coding
->carryover_size
)
2762 /* The data carried over in the previous decoding should be
2763 prepended to the new data read to decode all together. */
2764 bcopy (coding
->carryover
, buf
, coding
->carryover_size
);
2766 if (proc_buffered_char
[channel
] < 0)
2767 nchars
= read (channel
, buf
+ coding
->carryover_size
,
2768 (sizeof buf
) - coding
->carryover_size
);
2771 buf
[coding
->carryover_size
] = proc_buffered_char
[channel
];
2772 proc_buffered_char
[channel
] = -1;
2773 nchars
= read (channel
, buf
+ coding
->carryover_size
+ 1,
2774 (sizeof buf
) - coding
->carryover_size
- 1);
2778 nchars
= nchars
+ 1;
2781 #endif /* not VMS */
2783 /* At this point, NCHARS holds number of characters just received
2784 (including the one in proc_buffered_char[channel]). */
2785 if (nchars
<= 0) return nchars
;
2787 /* Now set NCHARS how many bytes we must decode. */
2788 nchars
+= coding
->carryover_size
;
2790 if (CODING_REQUIRE_DECODING (coding
)
2791 || CODING_REQUIRE_DETECTION (coding
))
2793 int require
= decoding_buffer_size (coding
, nchars
);
2794 int consumed
, produced
;
2796 if (XSTRING (p
->decoding_buf
)->size
< require
)
2797 p
->decoding_buf
= make_uninit_string (require
);
2798 produced
= decode_coding (coding
, chars
, XSTRING (p
->decoding_buf
)->data
,
2799 nchars
, XSTRING (p
->decoding_buf
)->size
,
2802 /* New coding-system might be found by `decode_coding'. */
2803 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
2805 p
->decode_coding_system
= coding
->symbol
;
2807 /* Don't call setup_coding_system for
2808 proc_decode_coding_system[channel] here. It is done in
2809 detect_coding called via decode_coding above. */
2811 /* If coding-system for encoding is not yet decided, we set
2812 it as the same as coding-system for decoding.
2814 But, before doing that we must check if
2815 proc_encode_coding_system[p->outfd] surely points to a
2816 valid memory because p->outfd will be changed once EOF is
2817 sent to the process. */
2818 if (NILP (p
->encode_coding_system
)
2819 && proc_encode_coding_system
[p
->outfd
])
2821 p
->encode_coding_system
= coding
->symbol
;
2822 setup_coding_system (coding
->symbol
,
2823 proc_encode_coding_system
[p
->outfd
]);
2827 /* Now we don't need the contents of `chars'. */
2828 if (chars_allocated
)
2833 chars
= (char *) XSTRING (p
->decoding_buf
)->data
;
2835 chars_in_decoding_buf
= 1;
2838 else if (chars_allocated
)
2840 /* Although we don't have to decode the received data, we must
2841 move it to an area which we don't have to free. */
2842 if (! STRINGP (p
->decoding_buf
)
2843 || XSTRING (p
->decoding_buf
)->size
< nchars
)
2844 p
->decoding_buf
= make_uninit_string (nchars
);
2845 bcopy (chars
, XSTRING (p
->decoding_buf
)->data
, nchars
);
2847 chars
= XSTRING (p
->decoding_buf
)->data
;
2848 chars_in_decoding_buf
= 1;
2852 Vlast_coding_system_used
= coding
->symbol
;
2854 outstream
= p
->filter
;
2855 if (!NILP (outstream
))
2857 /* We inhibit quit here instead of just catching it so that
2858 hitting ^G when a filter happens to be running won't screw
2860 int count
= specpdl_ptr
- specpdl
;
2861 Lisp_Object odeactivate
;
2862 Lisp_Object obuffer
, okeymap
;
2863 int outer_running_asynch_code
= running_asynch_code
;
2865 /* No need to gcpro these, because all we do with them later
2866 is test them for EQness, and none of them should be a string. */
2867 odeactivate
= Vdeactivate_mark
;
2868 XSETBUFFER (obuffer
, current_buffer
);
2869 okeymap
= current_buffer
->keymap
;
2871 specbind (Qinhibit_quit
, Qt
);
2872 specbind (Qlast_nonmenu_event
, Qt
);
2874 /* In case we get recursively called,
2875 and we already saved the match data nonrecursively,
2876 save the same match data in safely recursive fashion. */
2877 if (outer_running_asynch_code
)
2880 /* Don't clobber the CURRENT match data, either! */
2881 tem
= Fmatch_data (Qnil
, Qnil
);
2882 restore_match_data ();
2883 record_unwind_protect (Fstore_match_data
, Fmatch_data (Qnil
, Qnil
));
2884 Fstore_match_data (tem
);
2887 /* For speed, if a search happens within this code,
2888 save the match data in a special nonrecursive fashion. */
2889 running_asynch_code
= 1;
2891 /* Read and dispose of the process output. */
2892 internal_condition_case_1 (read_process_output_call
,
2895 Fcons (make_string (chars
,
2898 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
2899 read_process_output_error_handler
);
2901 /* If we saved the match data nonrecursively, restore it now. */
2902 restore_match_data ();
2903 running_asynch_code
= outer_running_asynch_code
;
2905 /* Handling the process output should not deactivate the mark. */
2906 Vdeactivate_mark
= odeactivate
;
2908 #if 0 /* Call record_asynch_buffer_change unconditionally,
2909 because we might have changed minor modes or other things
2910 that affect key bindings. */
2911 if (! EQ (Fcurrent_buffer (), obuffer
)
2912 || ! EQ (current_buffer
->keymap
, okeymap
))
2914 /* But do it only if the caller is actually going to read events.
2915 Otherwise there's no need to make him wake up, and it could
2916 cause trouble (for example it would make Fsit_for return). */
2917 if (waiting_for_user_input_p
== -1)
2918 record_asynch_buffer_change ();
2921 start_vms_process_read (vs
);
2923 unbind_to (count
, Qnil
);
2927 /* If no filter, write into buffer if it isn't dead. */
2928 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2930 Lisp_Object old_read_only
;
2931 int old_begv
, old_zv
;
2932 int old_begv_byte
, old_zv_byte
;
2933 Lisp_Object odeactivate
;
2934 int before
, before_byte
;
2937 odeactivate
= Vdeactivate_mark
;
2939 Fset_buffer (p
->buffer
);
2941 opoint_byte
= PT_BYTE
;
2942 old_read_only
= current_buffer
->read_only
;
2945 old_begv_byte
= BEGV_BYTE
;
2946 old_zv_byte
= ZV_BYTE
;
2948 current_buffer
->read_only
= Qnil
;
2950 /* Insert new output into buffer
2951 at the current end-of-output marker,
2952 thus preserving logical ordering of input and output. */
2953 if (XMARKER (p
->mark
)->buffer
)
2954 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
2955 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
2958 SET_PT_BOTH (ZV
, ZV_BYTE
);
2960 before_byte
= PT_BYTE
;
2962 /* If the output marker is outside of the visible region, save
2963 the restriction and widen. */
2964 if (! (BEGV
<= PT
&& PT
<= ZV
))
2967 /* Insert before markers in case we are inserting where
2968 the buffer's mark is, and the user's next command is Meta-y. */
2969 if (chars_in_decoding_buf
)
2970 insert_from_string_before_markers (p
->decoding_buf
, 0, nchars
, 0);
2972 insert_before_markers (chars
, nchars
);
2973 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
2975 update_mode_lines
++;
2977 /* Make sure opoint and the old restrictions
2978 float ahead of any new text just as point would. */
2979 if (opoint
>= before
)
2981 opoint
+= PT
- before
;
2982 opoint_byte
+= PT_BYTE
- before_byte
;
2984 if (old_begv
> before
)
2986 old_begv
+= PT
- before
;
2987 old_begv_byte
+= PT_BYTE
- before_byte
;
2989 if (old_zv
>= before
)
2991 old_zv
+= PT
- before
;
2992 old_zv_byte
+= PT_BYTE
- before_byte
;
2995 /* If the restriction isn't what it should be, set it. */
2996 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
2997 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
2999 /* Handling the process output should not deactivate the mark. */
3000 Vdeactivate_mark
= odeactivate
;
3002 current_buffer
->read_only
= old_read_only
;
3003 SET_PT_BOTH (opoint
, opoint_byte
);
3004 set_buffer_internal (old
);
3007 start_vms_process_read (vs
);
3012 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
3014 "Returns non-nil if emacs is waiting for input from the user.\n\
3015 This is intended for use by asynchronous process output filters and sentinels.")
3018 return (waiting_for_user_input_p
? Qt
: Qnil
);
3021 /* Sending data to subprocess */
3023 jmp_buf send_process_frame
;
3026 send_process_trap ()
3032 longjmp (send_process_frame
, 1);
3035 /* Send some data to process PROC.
3036 BUF is the beginning of the data; LEN is the number of characters.
3037 OBJECT is the Lisp object that the data comes from.
3039 The data is encoded by PROC's coding-system for encoding before it
3040 is sent. But if the data ends at the middle of multi-byte
3041 representation, that incomplete sequence of bytes are sent without
3042 being encoded. Should we store them in a buffer to prepend them to
3043 the data send later? */
3045 send_process (proc
, buf
, len
, object
)
3046 volatile Lisp_Object proc
;
3051 /* Use volatile to protect variables from being clobbered by longjmp. */
3053 volatile unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
3054 struct coding_system
*coding
;
3055 struct gcpro gcpro1
;
3060 struct Lisp_Process
*p
= XPROCESS (proc
);
3061 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
3064 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3065 update_status (XPROCESS (proc
));
3066 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3067 error ("Process %s not running", procname
);
3068 if (XINT (XPROCESS (proc
)->outfd
) < 0)
3069 error ("Output file descriptor of %s is closed", procname
);
3071 coding
= proc_encode_coding_system
[XINT (XPROCESS (proc
)->outfd
)];
3072 Vlast_coding_system_used
= coding
->symbol
;
3074 if (CODING_REQUIRE_ENCODING (coding
))
3076 int require
= encoding_buffer_size (coding
, len
);
3078 unsigned char *temp_buf
= NULL
;
3080 /* Remember the offset of data because a string or a buffer may
3081 be relocated. Setting OFFSET to -1 means we don't have to
3083 offset
= (BUFFERP (object
)
3084 ? BUF_PTR_BYTE_POS (XBUFFER (object
), buf
)
3086 ? offset
= buf
- XSTRING (object
)->data
3089 if (coding
->carryover_size
> 0)
3091 temp_buf
= (unsigned char *) xmalloc (len
+ coding
->carryover_size
);
3095 if (BUFFERP (object
))
3096 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
3097 else if (STRINGP (object
))
3098 buf
= offset
+ XSTRING (object
)->data
;
3099 /* Now we don't have to care relocation. */
3102 bcopy (coding
->carryover
, temp_buf
, coding
->carryover_size
);
3103 bcopy (buf
, temp_buf
+ coding
->carryover_size
, len
);
3107 if (XSTRING (XPROCESS (proc
)->encoding_buf
)->size
< require
)
3109 XPROCESS (proc
)->encoding_buf
= make_uninit_string (require
);
3113 if (BUFFERP (object
))
3114 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
3115 else if (STRINGP (object
))
3116 buf
= offset
+ XSTRING (object
)->data
;
3119 object
= XPROCESS (proc
)->encoding_buf
;
3120 len
= encode_coding (coding
, buf
, XSTRING (object
)->data
,
3121 len
, XSTRING (object
)->size
, &dummy
);
3122 buf
= XSTRING (object
)->data
;
3128 vs
= get_vms_process_pointer (p
->pid
);
3130 error ("Could not find this process: %x", p
->pid
);
3131 else if (write_to_vms_process (vs
, buf
, len
))
3135 if (pty_max_bytes
== 0)
3137 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
3138 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
3140 if (pty_max_bytes
< 0)
3141 pty_max_bytes
= 250;
3143 pty_max_bytes
= 250;
3145 /* Deduct one, to leave space for the eof. */
3149 if (!setjmp (send_process_frame
))
3153 SIGTYPE (*old_sigpipe
)();
3156 /* Decide how much data we can send in one batch.
3157 Long lines need to be split into multiple batches. */
3158 if (!NILP (XPROCESS (proc
)->pty_flag
))
3160 /* Starting this at zero is always correct when not the first iteration
3161 because the previous iteration ended by sending C-d.
3162 It may not be correct for the first iteration
3163 if a partial line was sent in a separate send_process call.
3164 If that proves worth handling, we need to save linepos
3165 in the process object. */
3167 unsigned char *ptr
= buf
;
3168 unsigned char *end
= buf
+ len
;
3170 /* Scan through this text for a line that is too long. */
3171 while (ptr
!= end
&& linepos
< pty_max_bytes
)
3179 /* If we found one, break the line there
3180 and put in a C-d to force the buffer through. */
3184 /* Send this batch, using one or more write calls. */
3187 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
3188 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
3189 signal (SIGPIPE
, old_sigpipe
);
3195 || errno
== EWOULDBLOCK
3201 /* Buffer is full. Wait, accepting input;
3202 that may allow the program
3203 to finish doing output and read more. */
3208 /* Running filters might relocate buffers or strings.
3209 Arrange to relocate BUF. */
3210 if (BUFFERP (object
))
3211 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
3212 else if (STRINGP (object
))
3213 offset
= buf
- XSTRING (object
)->data
;
3215 XSETFASTINT (zero
, 0);
3216 #ifdef EMACS_HAS_USECS
3217 wait_reading_process_input (0, 20000, zero
, 0);
3219 wait_reading_process_input (1, 0, zero
, 0);
3222 if (BUFFERP (object
))
3223 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
3224 else if (STRINGP (object
))
3225 buf
= offset
+ XSTRING (object
)->data
;
3230 /* This is a real error. */
3231 report_file_error ("writing to process", Fcons (proc
, Qnil
));
3238 /* If we sent just part of the string, put in an EOF
3239 to force it through, before we send the rest. */
3241 Fprocess_send_eof (proc
);
3246 XPROCESS (proc
)->raw_status_low
= Qnil
;
3247 XPROCESS (proc
)->raw_status_high
= Qnil
;
3248 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
3249 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
3250 deactivate_process (proc
);
3252 error ("Error writing to process %s; closed it", procname
);
3254 error ("SIGPIPE raised on process %s; closed it", procname
);
3261 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
3263 "Send current contents of region as input to PROCESS.\n\
3264 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3265 nil, indicating the current buffer's process.\n\
3266 Called from program, takes three arguments, PROCESS, START and END.\n\
3267 If the region is more than 500 characters long,\n\
3268 it is sent in several bunches. This may happen even for shorter regions.\n\
3269 Output from processes can arrive in between bunches.")
3270 (process
, start
, end
)
3271 Lisp_Object process
, start
, end
;
3276 proc
= get_process (process
);
3277 validate_region (&start
, &end
);
3279 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
3280 move_gap (XINT (start
));
3282 start1
= CHAR_TO_BYTE (XINT (start
));
3283 end1
= CHAR_TO_BYTE (XINT (end
));
3284 send_process (proc
, BYTE_POS_ADDR (start1
), end1
- start1
,
3285 Fcurrent_buffer ());
3290 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
3292 "Send PROCESS the contents of STRING as input.\n\
3293 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3294 nil, indicating the current buffer's process.\n\
3295 If STRING is more than 500 characters long,\n\
3296 it is sent in several bunches. This may happen even for shorter strings.\n\
3297 Output from processes can arrive in between bunches.")
3299 Lisp_Object process
, string
;
3302 CHECK_STRING (string
, 1);
3303 proc
= get_process (process
);
3304 send_process (proc
, XSTRING (string
)->data
, XSTRING (string
)->size
, string
);
3308 /* send a signal number SIGNO to PROCESS.
3309 CURRENT_GROUP means send to the process group that currently owns
3310 the terminal being used to communicate with PROCESS.
3311 This is used for various commands in shell mode.
3312 If NOMSG is zero, insert signal-announcements into process's buffers
3315 If we can, we try to signal PROCESS by sending control characters
3316 down the pty. This allows us to signal inferiors who have changed
3317 their uid, for which killpg would return an EPERM error. */
3320 process_send_signal (process
, signo
, current_group
, nomsg
)
3321 Lisp_Object process
;
3323 Lisp_Object current_group
;
3327 register struct Lisp_Process
*p
;
3331 proc
= get_process (process
);
3332 p
= XPROCESS (proc
);
3334 if (!EQ (p
->childp
, Qt
))
3335 error ("Process %s is not a subprocess",
3336 XSTRING (p
->name
)->data
);
3337 if (XINT (p
->infd
) < 0)
3338 error ("Process %s is not active",
3339 XSTRING (p
->name
)->data
);
3341 if (NILP (p
->pty_flag
))
3342 current_group
= Qnil
;
3344 /* If we are using pgrps, get a pgrp number and make it negative. */
3345 if (!NILP (current_group
))
3347 #ifdef SIGNALS_VIA_CHARACTERS
3348 /* If possible, send signals to the entire pgrp
3349 by sending an input character to it. */
3351 /* TERMIOS is the latest and bestest, and seems most likely to
3352 work. If the system has it, use it. */
3359 tcgetattr (XINT (p
->infd
), &t
);
3360 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
3364 tcgetattr (XINT (p
->infd
), &t
);
3365 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
3369 tcgetattr (XINT (p
->infd
), &t
);
3370 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
3371 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
3373 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
3378 #else /* ! HAVE_TERMIOS */
3380 /* On Berkeley descendants, the following IOCTL's retrieve the
3381 current control characters. */
3382 #if defined (TIOCGLTC) && defined (TIOCGETC)
3390 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
3391 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
3394 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
3395 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
3399 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
3400 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
3402 #endif /* ! defined (SIGTSTP) */
3405 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
3407 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
3414 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3415 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
3418 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3419 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
3423 ioctl (XINT (p
->infd
), TCGETA
, &t
);
3424 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
3426 #endif /* ! defined (SIGTSTP) */
3428 #else /* ! defined (TCGETA) */
3429 Your configuration files are messed up
.
3430 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
3431 you'd better be using one of the alternatives above! */
3432 #endif /* ! defined (TCGETA) */
3433 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
3434 #endif /* ! defined HAVE_TERMIOS */
3435 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
3438 /* Get the pgrp using the tty itself, if we have that.
3439 Otherwise, use the pty to get the pgrp.
3440 On pfa systems, saka@pfu.fujitsu.co.JP writes:
3441 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
3442 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
3443 His patch indicates that if TIOCGPGRP returns an error, then
3444 we should just assume that p->pid is also the process group id. */
3448 if (!NILP (p
->subtty
))
3449 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
3451 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
3455 gid
= - XFASTINT (p
->pid
);
3456 #endif /* ! defined (pfa) */
3462 #else /* ! defined (TIOCGPGRP ) */
3463 /* Can't select pgrps on this system, so we know that
3464 the child itself heads the pgrp. */
3465 gid
= - XFASTINT (p
->pid
);
3466 #endif /* ! defined (TIOCGPGRP ) */
3469 gid
= - XFASTINT (p
->pid
);
3475 p
->raw_status_low
= Qnil
;
3476 p
->raw_status_high
= Qnil
;
3478 XSETINT (p
->tick
, ++process_tick
);
3482 #endif /* ! defined (SIGCONT) */
3485 send_process (proc
, "\003", 1, Qnil
); /* ^C */
3490 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
3495 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
3498 flush_pending_output (XINT (p
->infd
));
3502 /* If we don't have process groups, send the signal to the immediate
3503 subprocess. That isn't really right, but it's better than any
3504 obvious alternative. */
3507 kill (XFASTINT (p
->pid
), signo
);
3511 /* gid may be a pid, or minus a pgrp's number */
3513 if (!NILP (current_group
))
3514 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
3517 gid
= - XFASTINT (p
->pid
);
3520 #else /* ! defined (TIOCSIGSEND) */
3521 EMACS_KILLPG (-gid
, signo
);
3522 #endif /* ! defined (TIOCSIGSEND) */
3525 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
3526 "Interrupt process PROCESS. May be process or name of one.\n\
3527 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
3528 nil or no arg means current buffer's process.\n\
3529 Second arg CURRENT-GROUP non-nil means send signal to\n\
3530 the current process-group of the process's controlling terminal\n\
3531 rather than to the process's own process group.\n\
3532 If the process is a shell, this means interrupt current subjob\n\
3533 rather than the shell.")
3534 (process
, current_group
)
3535 Lisp_Object process
, current_group
;
3537 process_send_signal (process
, SIGINT
, current_group
, 0);
3541 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
3542 "Kill process PROCESS. May be process or name of one.\n\
3543 See function `interrupt-process' for more details on usage.")
3544 (process
, current_group
)
3545 Lisp_Object process
, current_group
;
3547 process_send_signal (process
, SIGKILL
, current_group
, 0);
3551 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
3552 "Send QUIT signal to process PROCESS. May be process or name of one.\n\
3553 See function `interrupt-process' for more details on usage.")
3554 (process
, current_group
)
3555 Lisp_Object process
, current_group
;
3557 process_send_signal (process
, SIGQUIT
, current_group
, 0);
3561 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
3562 "Stop process PROCESS. May be process or name of one.\n\
3563 See function `interrupt-process' for more details on usage.")
3564 (process
, current_group
)
3565 Lisp_Object process
, current_group
;
3568 error ("no SIGTSTP support");
3570 process_send_signal (process
, SIGTSTP
, current_group
, 0);
3575 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
3576 "Continue process PROCESS. May be process or name of one.\n\
3577 See function `interrupt-process' for more details on usage.")
3578 (process
, current_group
)
3579 Lisp_Object process
, current_group
;
3582 process_send_signal (process
, SIGCONT
, current_group
, 0);
3584 error ("no SIGCONT support");
3589 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
3590 2, 2, "nProcess number: \nnSignal code: ",
3591 "Send the process with process id PID the signal with code SIGCODE.\n\
3592 PID must be an integer. The process need not be a child of this Emacs.\n\
3593 SIGCODE may be an integer, or a symbol whose name is a signal name.")
3595 Lisp_Object pid
, sigcode
;
3597 CHECK_NUMBER (pid
, 0);
3599 #define handle_signal(NAME, VALUE) \
3600 else if (!strcmp (name, NAME)) \
3601 XSETINT (sigcode, VALUE)
3603 if (INTEGERP (sigcode
))
3607 unsigned char *name
;
3609 CHECK_SYMBOL (sigcode
, 1);
3610 name
= XSYMBOL (sigcode
)->name
->data
;
3615 handle_signal ("SIGHUP", SIGHUP
);
3618 handle_signal ("SIGINT", SIGINT
);
3621 handle_signal ("SIGQUIT", SIGQUIT
);
3624 handle_signal ("SIGILL", SIGILL
);
3627 handle_signal ("SIGABRT", SIGABRT
);
3630 handle_signal ("SIGEMT", SIGEMT
);
3633 handle_signal ("SIGKILL", SIGKILL
);
3636 handle_signal ("SIGFPE", SIGFPE
);
3639 handle_signal ("SIGBUS", SIGBUS
);
3642 handle_signal ("SIGSEGV", SIGSEGV
);
3645 handle_signal ("SIGSYS", SIGSYS
);
3648 handle_signal ("SIGPIPE", SIGPIPE
);
3651 handle_signal ("SIGALRM", SIGALRM
);
3654 handle_signal ("SIGTERM", SIGTERM
);
3657 handle_signal ("SIGURG", SIGURG
);
3660 handle_signal ("SIGSTOP", SIGSTOP
);
3663 handle_signal ("SIGTSTP", SIGTSTP
);
3666 handle_signal ("SIGCONT", SIGCONT
);
3669 handle_signal ("SIGCHLD", SIGCHLD
);
3672 handle_signal ("SIGTTIN", SIGTTIN
);
3675 handle_signal ("SIGTTOU", SIGTTOU
);
3678 handle_signal ("SIGIO", SIGIO
);
3681 handle_signal ("SIGXCPU", SIGXCPU
);
3684 handle_signal ("SIGXFSZ", SIGXFSZ
);
3687 handle_signal ("SIGVTALRM", SIGVTALRM
);
3690 handle_signal ("SIGPROF", SIGPROF
);
3693 handle_signal ("SIGWINCH", SIGWINCH
);
3696 handle_signal ("SIGINFO", SIGINFO
);
3699 handle_signal ("SIGUSR1", SIGUSR1
);
3702 handle_signal ("SIGUSR2", SIGUSR2
);
3705 error ("Undefined signal name %s", name
);
3708 #undef handle_signal
3710 return make_number (kill (XINT (pid
), XINT (sigcode
)));
3713 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
3714 "Make PROCESS see end-of-file in its input.\n\
3715 Eof comes after any text already sent to it.\n\
3716 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
3717 nil, indicating the current buffer's process.\n\
3718 If PROCESS is a network connection, or is a process communicating\n\
3719 through a pipe (as opposed to a pty), then you cannot send any more\n\
3720 text to PROCESS after you call this function.")
3722 Lisp_Object process
;
3726 proc
= get_process (process
);
3728 /* Make sure the process is really alive. */
3729 if (! NILP (XPROCESS (proc
)->raw_status_low
))
3730 update_status (XPROCESS (proc
));
3731 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
3732 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
3735 send_process (proc
, "\032", 1, Qnil
); /* ^z */
3737 if (!NILP (XPROCESS (proc
)->pty_flag
))
3738 send_process (proc
, "\004", 1, Qnil
);
3741 #ifdef HAVE_SHUTDOWN
3742 /* If this is a network connection, or socketpair is used
3743 for communication with the subprocess, call shutdown to cause EOF.
3744 (In some old system, shutdown to socketpair doesn't work.
3745 Then we just can't win.) */
3746 if (NILP (XPROCESS (proc
)->pid
)
3747 || XINT (XPROCESS (proc
)->outfd
) == XINT (XPROCESS (proc
)->infd
))
3748 shutdown (XINT (XPROCESS (proc
)->outfd
), 1);
3749 /* In case of socketpair, outfd == infd, so don't close it. */
3750 if (XINT (XPROCESS (proc
)->outfd
) != XINT (XPROCESS (proc
)->infd
))
3751 close (XINT (XPROCESS (proc
)->outfd
));
3752 #else /* not HAVE_SHUTDOWN */
3753 close (XINT (XPROCESS (proc
)->outfd
));
3754 #endif /* not HAVE_SHUTDOWN */
3755 XSETINT (XPROCESS (proc
)->outfd
, open (NULL_DEVICE
, O_WRONLY
));
3761 /* Kill all processes associated with `buffer'.
3762 If `buffer' is nil, kill all processes */
3765 kill_buffer_processes (buffer
)
3768 Lisp_Object tail
, proc
;
3770 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3772 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3773 if (GC_PROCESSP (proc
)
3774 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
3776 if (NETCONN_P (proc
))
3777 Fdelete_process (proc
);
3778 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
3779 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
3784 /* On receipt of a signal that a child status has changed,
3785 loop asking about children with changed statuses until
3786 the system says there are no more.
3787 All we do is change the status;
3788 we do not run sentinels or print notifications.
3789 That is saved for the next time keyboard input is done,
3790 in order to avoid timing errors. */
3792 /** WARNING: this can be called during garbage collection.
3793 Therefore, it must not be fooled by the presence of mark bits in
3796 /** USG WARNING: Although it is not obvious from the documentation
3797 in signal(2), on a USG system the SIGCLD handler MUST NOT call
3798 signal() before executing at least one wait(), otherwise the handler
3799 will be called again, resulting in an infinite loop. The relevant
3800 portion of the documentation reads "SIGCLD signals will be queued
3801 and the signal-catching function will be continually reentered until
3802 the queue is empty". Invoking signal() causes the kernel to reexamine
3803 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
3806 sigchld_handler (signo
)
3809 int old_errno
= errno
;
3811 register struct Lisp_Process
*p
;
3812 extern EMACS_TIME
*input_available_clear_time
;
3816 sigheld
|= sigbit (SIGCHLD
);
3828 #endif /* no WUNTRACED */
3829 /* Keep trying to get a status until we get a definitive result. */
3833 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
3835 while (pid
<= 0 && errno
== EINTR
);
3839 /* A real failure. We have done all our job, so return. */
3841 /* USG systems forget handlers when they are used;
3842 must reestablish each time */
3843 #if defined (USG) && !defined (POSIX_SIGNALS)
3844 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
3847 sigheld
&= ~sigbit (SIGCHLD
);
3855 #endif /* no WNOHANG */
3857 /* Find the process that signaled us, and record its status. */
3860 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3862 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3863 p
= XPROCESS (proc
);
3864 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
3869 /* Look for an asynchronous process whose pid hasn't been filled
3872 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCONS (tail
)->cdr
)
3874 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
3875 p
= XPROCESS (proc
);
3876 if (INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
3881 /* Change the status of the process that was found. */
3884 union { int i
; WAITTYPE wt
; } u
;
3885 int clear_desc_flag
= 0;
3887 XSETINT (p
->tick
, ++process_tick
);
3889 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
3890 XSETINT (p
->raw_status_high
, u
.i
>> 16);
3892 /* If process has terminated, stop waiting for its output. */
3893 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
3894 && XINT (p
->infd
) >= 0)
3895 clear_desc_flag
= 1;
3897 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
3898 if (clear_desc_flag
)
3900 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
3901 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
3904 /* Tell wait_reading_process_input that it needs to wake up and
3906 if (input_available_clear_time
)
3907 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3910 /* There was no asynchronous process found for that id. Check
3911 if we have a synchronous process. */
3914 synch_process_alive
= 0;
3916 /* Report the status of the synchronous process. */
3918 synch_process_retcode
= WRETCODE (w
);
3919 else if (WIFSIGNALED (w
))
3921 int code
= WTERMSIG (w
);
3927 /* Suppress warning if the table has const char *. */
3928 signame
= (char *) sys_siglist
[code
];
3930 signame
= sys_errlist
[code
];
3934 signame
= "unknown";
3936 synch_process_death
= signame
;
3939 /* Tell wait_reading_process_input that it needs to wake up and
3941 if (input_available_clear_time
)
3942 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3945 /* On some systems, we must return right away.
3946 If any more processes want to signal us, we will
3948 Otherwise (on systems that have WNOHANG), loop around
3949 to use up all the processes that have something to tell us. */
3950 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG)) || defined (WINDOWSNT)
3951 #if defined (USG) && ! defined (POSIX_SIGNALS)
3952 signal (signo
, sigchld_handler
);
3956 #endif /* USG, but not HPUX with WNOHANG */
3962 exec_sentinel_unwind (data
)
3965 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
3970 exec_sentinel_error_handler (error
)
3973 cmd_error_internal (error
, "error in process sentinel: ");
3975 update_echo_area ();
3976 Fsleep_for (make_number (2), Qnil
);
3980 exec_sentinel (proc
, reason
)
3981 Lisp_Object proc
, reason
;
3983 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
3984 register struct Lisp_Process
*p
= XPROCESS (proc
);
3985 int count
= specpdl_ptr
- specpdl
;
3986 int outer_running_asynch_code
= running_asynch_code
;
3988 /* No need to gcpro these, because all we do with them later
3989 is test them for EQness, and none of them should be a string. */
3990 odeactivate
= Vdeactivate_mark
;
3991 XSETBUFFER (obuffer
, current_buffer
);
3992 okeymap
= current_buffer
->keymap
;
3994 sentinel
= p
->sentinel
;
3995 if (NILP (sentinel
))
3998 /* Zilch the sentinel while it's running, to avoid recursive invocations;
3999 assure that it gets restored no matter how the sentinel exits. */
4001 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
4002 /* Inhibit quit so that random quits don't screw up a running filter. */
4003 specbind (Qinhibit_quit
, Qt
);
4004 specbind (Qlast_nonmenu_event
, Qt
);
4006 /* In case we get recursively called,
4007 and we already saved the match data nonrecursively,
4008 save the same match data in safely recursive fashion. */
4009 if (outer_running_asynch_code
)
4012 tem
= Fmatch_data (Qnil
, Qnil
);
4013 restore_match_data ();
4014 record_unwind_protect (Fstore_match_data
, Fmatch_data (Qnil
, Qnil
));
4015 Fstore_match_data (tem
);
4018 /* For speed, if a search happens within this code,
4019 save the match data in a special nonrecursive fashion. */
4020 running_asynch_code
= 1;
4022 internal_condition_case_1 (read_process_output_call
,
4024 Fcons (proc
, Fcons (reason
, Qnil
))),
4025 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
4026 exec_sentinel_error_handler
);
4028 /* If we saved the match data nonrecursively, restore it now. */
4029 restore_match_data ();
4030 running_asynch_code
= outer_running_asynch_code
;
4032 Vdeactivate_mark
= odeactivate
;
4034 if (! EQ (Fcurrent_buffer (), obuffer
)
4035 || ! EQ (current_buffer
->keymap
, okeymap
))
4037 /* But do it only if the caller is actually going to read events.
4038 Otherwise there's no need to make him wake up, and it could
4039 cause trouble (for example it would make Fsit_for return). */
4040 if (waiting_for_user_input_p
== -1)
4041 record_asynch_buffer_change ();
4043 unbind_to (count
, Qnil
);
4046 /* Report all recent events of a change in process status
4047 (either run the sentinel or output a message).
4048 This is done while Emacs is waiting for keyboard input. */
4053 register Lisp_Object proc
, buffer
;
4054 Lisp_Object tail
, msg
;
4055 struct gcpro gcpro1
, gcpro2
;
4059 /* We need to gcpro tail; if read_process_output calls a filter
4060 which deletes a process and removes the cons to which tail points
4061 from Vprocess_alist, and then causes a GC, tail is an unprotected
4065 /* Set this now, so that if new processes are created by sentinels
4066 that we run, we get called again to handle their status changes. */
4067 update_tick
= process_tick
;
4069 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
4072 register struct Lisp_Process
*p
;
4074 proc
= Fcdr (Fcar (tail
));
4075 p
= XPROCESS (proc
);
4077 if (XINT (p
->tick
) != XINT (p
->update_tick
))
4079 XSETINT (p
->update_tick
, XINT (p
->tick
));
4081 /* If process is still active, read any output that remains. */
4082 while (! EQ (p
->filter
, Qt
)
4083 && XINT (p
->infd
) >= 0
4084 && read_process_output (proc
, XINT (p
->infd
)) > 0);
4088 /* Get the text to use for the message. */
4089 if (!NILP (p
->raw_status_low
))
4091 msg
= status_message (p
->status
);
4093 /* If process is terminated, deactivate it or delete it. */
4095 if (CONSP (p
->status
))
4096 symbol
= XCONS (p
->status
)->car
;
4098 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
4099 || EQ (symbol
, Qclosed
))
4101 if (delete_exited_processes
)
4102 remove_process (proc
);
4104 deactivate_process (proc
);
4107 /* The actions above may have further incremented p->tick.
4108 So set p->update_tick again
4109 so that an error in the sentinel will not cause
4110 this code to be run again. */
4111 XSETINT (p
->update_tick
, XINT (p
->tick
));
4112 /* Now output the message suitably. */
4113 if (!NILP (p
->sentinel
))
4114 exec_sentinel (proc
, msg
);
4115 /* Don't bother with a message in the buffer
4116 when a process becomes runnable. */
4117 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
4119 Lisp_Object ro
, tem
;
4120 struct buffer
*old
= current_buffer
;
4121 int opoint
, opoint_byte
;
4122 int before
, before_byte
;
4124 ro
= XBUFFER (buffer
)->read_only
;
4126 /* Avoid error if buffer is deleted
4127 (probably that's why the process is dead, too) */
4128 if (NILP (XBUFFER (buffer
)->name
))
4130 Fset_buffer (buffer
);
4133 opoint_byte
= PT_BYTE
;
4134 /* Insert new output into buffer
4135 at the current end-of-output marker,
4136 thus preserving logical ordering of input and output. */
4137 if (XMARKER (p
->mark
)->buffer
)
4138 Fgoto_char (p
->mark
);
4140 SET_PT_BOTH (ZV
, ZV_BYTE
);
4143 before_byte
= PT_BYTE
;
4145 tem
= current_buffer
->read_only
;
4146 current_buffer
->read_only
= Qnil
;
4147 insert_string ("\nProcess ");
4148 Finsert (1, &p
->name
);
4149 insert_string (" ");
4151 current_buffer
->read_only
= tem
;
4152 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
4154 if (opoint
>= before
)
4155 SET_PT_BOTH (opoint
+ (PT
- before
),
4156 opoint_byte
+ (PT_BYTE
- before_byte
));
4158 SET_PT_BOTH (opoint
, opoint_byte
);
4160 set_buffer_internal (old
);
4165 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
4166 redisplay_preserve_echo_area ();
4172 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
4173 Sset_process_coding_system
, 1, 3, 0,
4174 "Set coding systems of PROCESS to DECODING (input from the process) and\n\
4175 ENCODING (output to the process).")
4176 (proc
, decoding
, encoding
)
4177 register Lisp_Object proc
, decoding
, encoding
;
4179 register struct Lisp_Process
*p
;
4181 CHECK_PROCESS (proc
, 0);
4182 p
= XPROCESS (proc
);
4183 if (XINT (p
->infd
) < 0)
4184 error ("Input file descriptor of %s closed", XSTRING (p
->name
)->data
);
4185 if (XINT (p
->outfd
) < 0)
4186 error ("Output file descriptor of %s closed", XSTRING (p
->name
)->data
);
4188 p
->decode_coding_system
= Fcheck_coding_system (decoding
);
4189 p
->encode_coding_system
= Fcheck_coding_system (encoding
);
4190 setup_coding_system (decoding
,
4191 proc_decode_coding_system
[XINT (p
->infd
)]);
4192 setup_coding_system (encoding
,
4193 proc_encode_coding_system
[XINT (p
->outfd
)]);
4198 DEFUN ("process-coding-system",
4199 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
4200 "Return a cons of coding systems for decoding and encoding of PROCESS.")
4202 register Lisp_Object proc
;
4204 CHECK_PROCESS (proc
, 0);
4205 return Fcons (XPROCESS (proc
)->decode_coding_system
,
4206 XPROCESS (proc
)->encode_coding_system
);
4209 /* The first time this is called, assume keyboard input comes from DESC
4210 instead of from where we used to expect it.
4211 Subsequent calls mean assume input keyboard can come from DESC
4212 in addition to other places. */
4214 static int add_keyboard_wait_descriptor_called_flag
;
4217 add_keyboard_wait_descriptor (desc
)
4220 if (! add_keyboard_wait_descriptor_called_flag
)
4221 FD_CLR (0, &input_wait_mask
);
4222 add_keyboard_wait_descriptor_called_flag
= 1;
4223 FD_SET (desc
, &input_wait_mask
);
4224 FD_SET (desc
, &non_process_wait_mask
);
4225 if (desc
> max_keyboard_desc
)
4226 max_keyboard_desc
= desc
;
4229 /* From now on, do not expect DESC to give keyboard input. */
4232 delete_keyboard_wait_descriptor (desc
)
4236 int lim
= max_keyboard_desc
;
4238 FD_CLR (desc
, &input_wait_mask
);
4239 FD_CLR (desc
, &non_process_wait_mask
);
4241 if (desc
== max_keyboard_desc
)
4242 for (fd
= 0; fd
< lim
; fd
++)
4243 if (FD_ISSET (fd
, &input_wait_mask
)
4244 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
4245 max_keyboard_desc
= fd
;
4248 /* Return nonzero if *MASK has a bit set
4249 that corresponds to one of the keyboard input descriptors. */
4252 keyboard_bit_set (mask
)
4257 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
4258 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
4259 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
4271 if (! noninteractive
|| initialized
)
4273 signal (SIGCHLD
, sigchld_handler
);
4276 FD_ZERO (&input_wait_mask
);
4277 FD_ZERO (&non_keyboard_wait_mask
);
4278 FD_ZERO (&non_process_wait_mask
);
4279 max_process_desc
= 0;
4281 FD_SET (0, &input_wait_mask
);
4283 Vprocess_alist
= Qnil
;
4284 for (i
= 0; i
< MAXDESC
; i
++)
4286 chan_process
[i
] = Qnil
;
4287 proc_buffered_char
[i
] = -1;
4289 bzero (proc_decode_coding_system
, sizeof proc_decode_coding_system
);
4290 bzero (proc_encode_coding_system
, sizeof proc_encode_coding_system
);
4295 Qprocessp
= intern ("processp");
4296 staticpro (&Qprocessp
);
4297 Qrun
= intern ("run");
4299 Qstop
= intern ("stop");
4301 Qsignal
= intern ("signal");
4302 staticpro (&Qsignal
);
4304 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
4307 Qexit = intern ("exit");
4308 staticpro (&Qexit); */
4310 Qopen
= intern ("open");
4312 Qclosed
= intern ("closed");
4313 staticpro (&Qclosed
);
4315 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
4316 staticpro (&Qlast_nonmenu_event
);
4318 staticpro (&Vprocess_alist
);
4320 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
4321 "*Non-nil means delete processes immediately when they exit.\n\
4322 nil means don't delete them until `list-processes' is run.");
4324 delete_exited_processes
= 1;
4326 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
4327 "Control type of device used to communicate with subprocesses.\n\
4328 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
4329 The value has no effect if the system has no ptys or if all ptys are busy:\n\
4330 then a pipe is used in any case.\n\
4331 The value takes effect when `start-process' is called.");
4332 Vprocess_connection_type
= Qt
;
4334 defsubr (&Sprocessp
);
4335 defsubr (&Sget_process
);
4336 defsubr (&Sget_buffer_process
);
4337 defsubr (&Sdelete_process
);
4338 defsubr (&Sprocess_status
);
4339 defsubr (&Sprocess_exit_status
);
4340 defsubr (&Sprocess_id
);
4341 defsubr (&Sprocess_name
);
4342 defsubr (&Sprocess_tty_name
);
4343 defsubr (&Sprocess_command
);
4344 defsubr (&Sset_process_buffer
);
4345 defsubr (&Sprocess_buffer
);
4346 defsubr (&Sprocess_mark
);
4347 defsubr (&Sset_process_filter
);
4348 defsubr (&Sprocess_filter
);
4349 defsubr (&Sset_process_sentinel
);
4350 defsubr (&Sprocess_sentinel
);
4351 defsubr (&Sset_process_window_size
);
4352 defsubr (&Sprocess_kill_without_query
);
4353 defsubr (&Sprocess_contact
);
4354 defsubr (&Slist_processes
);
4355 defsubr (&Sprocess_list
);
4356 defsubr (&Sstart_process
);
4358 defsubr (&Sopen_network_stream
);
4359 #endif /* HAVE_SOCKETS */
4360 defsubr (&Saccept_process_output
);
4361 defsubr (&Sprocess_send_region
);
4362 defsubr (&Sprocess_send_string
);
4363 defsubr (&Sinterrupt_process
);
4364 defsubr (&Skill_process
);
4365 defsubr (&Squit_process
);
4366 defsubr (&Sstop_process
);
4367 defsubr (&Scontinue_process
);
4368 defsubr (&Sprocess_send_eof
);
4369 defsubr (&Ssignal_process
);
4370 defsubr (&Swaiting_for_user_input_p
);
4371 /* defsubr (&Sprocess_connection); */
4372 defsubr (&Sset_process_coding_system
);
4373 defsubr (&Sprocess_coding_system
);
4377 #else /* not subprocesses */
4379 #include <sys/types.h>
4383 #include "systime.h"
4384 #include "termopts.h"
4385 #include "sysselect.h"
4387 extern int frame_garbaged
;
4389 extern EMACS_TIME
timer_check ();
4390 extern int timers_run
;
4392 /* As described above, except assuming that there are no subprocesses:
4394 Wait for timeout to elapse and/or keyboard input to be available.
4397 timeout in seconds, or
4398 zero for no limit, or
4399 -1 means gobble data immediately available but don't wait for any.
4401 read_kbd is a Lisp_Object:
4402 0 to ignore keyboard input, or
4403 1 to return when input is available, or
4404 -1 means caller will actually read the input, so don't throw to
4406 a cons cell, meaning wait until its car is non-nil
4407 (and gobble terminal input into the buffer if any arrives), or
4408 We know that read_kbd will never be a Lisp_Process, since
4409 `subprocesses' isn't defined.
4411 do_display != 0 means redisplay should be done to show subprocess
4412 output that arrives.
4414 Return true iff we received input from any process. */
4417 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
4418 int time_limit
, microsecs
;
4419 Lisp_Object read_kbd
;
4422 EMACS_TIME end_time
, timeout
;
4423 SELECT_TYPE waitchannels
;
4425 Lisp_Object
*wait_for_cell
= 0;
4427 /* If waiting for non-nil in a cell, record where. */
4428 if (CONSP (read_kbd
))
4430 wait_for_cell
= &XCONS (read_kbd
)->car
;
4431 XSETFASTINT (read_kbd
, 0);
4434 /* What does time_limit really mean? */
4435 if (time_limit
|| microsecs
)
4437 if (time_limit
== -1)
4438 /* In fact, it's zero. */
4439 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4441 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4443 /* How far in the future is that? */
4444 EMACS_GET_TIME (end_time
);
4445 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4448 /* It's infinite. */
4449 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4451 /* Turn off periodic alarms (in case they are in use)
4452 because the select emulator uses alarms. */
4458 int timeout_reduced_for_timers
= 0;
4460 /* If calling from keyboard input, do not quit
4461 since we want to return C-g as an input character.
4462 Otherwise, do pending quit if requested. */
4463 if (XINT (read_kbd
) >= 0)
4466 /* Exit now if the cell we're waiting for became non-nil. */
4467 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
4470 /* Compute time from now till when time limit is up */
4471 /* Exit if already run out */
4472 if (time_limit
> 0 || microsecs
)
4474 EMACS_GET_TIME (timeout
);
4475 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4476 if (EMACS_TIME_NEG_P (timeout
))
4480 /* If our caller will not immediately handle keyboard events,
4481 run timer events directly.
4482 (Callers that will immediately read keyboard events
4483 call timer_delay on their own.) */
4484 if (! wait_for_cell
)
4486 EMACS_TIME timer_delay
;
4490 old_timers_run
= timers_run
;
4491 timer_delay
= timer_check (1);
4492 if (timers_run
!= old_timers_run
&& do_display
)
4494 redisplay_preserve_echo_area ();
4495 /* We must retry, since a timer may have requeued itself
4496 and that could alter the time delay. */
4500 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4502 EMACS_TIME difference
;
4503 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4504 if (EMACS_TIME_NEG_P (difference
))
4506 timeout
= timer_delay
;
4507 timeout_reduced_for_timers
= 1;
4512 /* Cause C-g and alarm signals to take immediate action,
4513 and cause input available signals to zero out timeout. */
4514 if (XINT (read_kbd
) < 0)
4515 set_waiting_for_input (&timeout
);
4517 /* Wait till there is something to do. */
4519 if (! XINT (read_kbd
) && wait_for_cell
== 0)
4520 FD_ZERO (&waitchannels
);
4522 FD_SET (0, &waitchannels
);
4524 /* If a frame has been newly mapped and needs updating,
4525 reprocess its display stuff. */
4526 if (frame_garbaged
&& do_display
)
4528 clear_waiting_for_input ();
4529 redisplay_preserve_echo_area ();
4530 if (XINT (read_kbd
) < 0)
4531 set_waiting_for_input (&timeout
);
4534 if (XINT (read_kbd
) && detect_input_pending ())
4537 FD_ZERO (&waitchannels
);
4540 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
4545 /* Make C-g and alarm signals set flags again */
4546 clear_waiting_for_input ();
4548 /* If we woke up due to SIGWINCH, actually change size now. */
4549 do_pending_window_change ();
4551 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4552 /* We waited the full specified time, so return now. */
4557 /* If the system call was interrupted, then go around the
4559 if (xerrno
== EINTR
)
4560 FD_ZERO (&waitchannels
);
4562 error ("select error: %s", strerror (xerrno
));
4565 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
4566 /* System sometimes fails to deliver SIGIO. */
4567 kill (getpid (), SIGIO
);
4570 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
4571 kill (getpid (), SIGIO
);
4574 /* Check for keyboard input */
4576 if ((XINT (read_kbd
) != 0)
4577 && detect_input_pending_run_timers (do_display
))
4579 swallow_events (do_display
);
4580 if (detect_input_pending_run_timers (do_display
))
4584 /* If wait_for_cell. check for keyboard input
4585 but don't run any timers.
4586 ??? (It seems wrong to me to check for keyboard
4587 input at all when wait_for_cell, but the code
4588 has been this way since July 1994.
4589 Try changing this after version 19.31.) */
4591 && detect_input_pending ())
4593 swallow_events (do_display
);
4594 if (detect_input_pending ())
4598 /* Exit now if the cell we're waiting for became non-nil. */
4599 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
4609 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
4610 /* Don't confuse make-docfile by having two doc strings for this function.
4611 make-docfile does not pay attention to #if, for good reason! */
4614 register Lisp_Object name
;
4619 /* Kill all processes associated with `buffer'.
4620 If `buffer' is nil, kill all processes.
4621 Since we have no subprocesses, this does nothing. */
4623 kill_buffer_processes (buffer
)
4634 defsubr (&Sget_buffer_process
);
4638 #endif /* not subprocesses */