1 /* Asynchronous subprocess control for GNU Emacs.
2 Copyright (C) 1985, 86, 87, 88, 93, 94 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
6 GNU Emacs is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU Emacs is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU Emacs; see the file COPYING. If not, write to
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
25 /* This file is split into two parts by the following preprocessor
26 conditional. The 'then' clause contains all of the support for
27 asynchronous subprocesses. The 'else' clause contains stub
28 versions of some of the asynchronous subprocess routines that are
29 often called elsewhere in Emacs, so we don't have to #ifdef the
30 sections that call them. */
38 #include <sys/types.h> /* some typedefs are used in sys/file.h */
45 #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */
46 #include <sys/socket.h>
48 #include <netinet/in.h>
49 #include <arpa/inet.h>
50 #endif /* HAVE_SOCKETS */
52 /* TERM is a poor-man's SLIP, used on Linux. */
57 /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */
58 #ifdef HAVE_BROKEN_INET_ADDR
59 #define IN_ADDR struct in_addr
60 #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1)
62 #define IN_ADDR unsigned long
63 #define NUMERIC_ADDR_ERROR (numeric_addr == -1)
66 #if defined(BSD) || defined(STRIDE)
67 #include <sys/ioctl.h>
68 #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5)
70 #endif /* HAVE_PTYS and no O_NDELAY */
71 #endif /* BSD or STRIDE */
73 #ifdef BROKEN_O_NONBLOCK
75 #endif /* BROKEN_O_NONBLOCK */
82 #include <sys/sysmacros.h> /* for "minor" */
92 #include "termhooks.h"
97 Lisp_Object Qprocessp
;
98 Lisp_Object Qrun
, Qstop
, Qsignal
, Qopen
, Qclosed
;
99 Lisp_Object Qlast_nonmenu_event
;
100 /* Qexit is declared and initialized in eval.c. */
102 /* a process object is a network connection when its childp field is neither
103 Qt nor Qnil but is instead a string (name of foreign host we
104 are connected to + name of port we are connected to) */
107 static Lisp_Object stream_process
;
109 #define NETCONN_P(p) (XGCTYPE (XPROCESS (p)->childp) == Lisp_String)
111 #define NETCONN_P(p) 0
112 #endif /* HAVE_SOCKETS */
114 /* Define first descriptor number available for subprocesses. */
116 #define FIRST_PROC_DESC 1
118 #define FIRST_PROC_DESC 3
121 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
124 #if !defined (SIGCHLD) && defined (SIGCLD)
125 #define SIGCHLD SIGCLD
128 #include "syssignal.h"
133 extern char *strerror ();
135 extern char *sys_errlist
[];
138 #ifndef SYS_SIGLIST_DECLARED
142 extern char *sys_siglist
[];
143 #endif /* not LINUX */
145 char *sys_siglist
[] =
151 "illegal instruction",
155 "floating point exception",
158 "segmentation violation",
159 "bad argument to system call",
160 "write on a pipe with no one to read it",
162 "software termination signal from kill",
164 "sendable stop signal not from tty",
165 "stop signal from tty",
166 "continue a stopped process",
167 "child status has changed",
168 "background read attempted from control tty",
169 "background write attempted from control tty",
170 "input record available at control tty",
171 "exceeded CPU time limit",
172 "exceeded file size limit"
176 #endif /* ! SYS_SIGLIST_DECLARED */
178 /* t means use pty, nil means use a pipe,
179 maybe other values to come. */
180 static Lisp_Object Vprocess_connection_type
;
184 #include <sys/socket.h>
188 /* Number of events of change of status of a process. */
189 static int process_tick
;
191 /* Number of events for which the user or sentinel has been notified. */
192 static int update_tick
;
195 /* We could get this from param.h, but better not to depend on finding that.
196 And better not to risk that it might define other symbols used in this
199 #define MAXDESC FD_SETSIZE
203 #define SELECT_TYPE fd_set
204 #else /* no FD_SET */
206 #define SELECT_TYPE int
208 /* Define the macros to access a single-int bitmap of descriptors. */
209 #define FD_SET(n, p) (*(p) |= (1 << (n)))
210 #define FD_CLR(n, p) (*(p) &= ~(1 << (n)))
211 #define FD_ISSET(n, p) (*(p) & (1 << (n)))
212 #define FD_ZERO(p) (*(p) = 0)
213 #endif /* no FD_SET */
215 /* If we support X Windows, turn on the code to poll periodically
216 to detect C-g. It isn't actually used when doing interrupt input. */
217 #ifdef HAVE_X_WINDOWS
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 /* The largest descriptor currently in use for a process object. */
226 static int max_process_desc
;
228 /* Descriptor to use for keyboard input. */
229 static int keyboard_descriptor
;
231 /* Nonzero means delete a process right away if it exits. */
232 static int delete_exited_processes
;
234 /* Indexed by descriptor, gives the process (if any) for that descriptor */
235 Lisp_Object chan_process
[MAXDESC
];
237 /* Alist of elements (NAME . PROCESS) */
238 Lisp_Object Vprocess_alist
;
240 /* Buffered-ahead input char from process, indexed by channel.
241 -1 means empty (no char is buffered).
242 Used on sys V where the only way to tell if there is any
243 output from the process is to read at least one char.
244 Always -1 on systems that support FIONREAD. */
246 static int proc_buffered_char
[MAXDESC
];
248 static Lisp_Object
get_process ();
250 /* Maximum number of bytes to send to a pty without an eof. */
251 static int pty_max_bytes
;
253 /* Compute the Lisp form of the process status, p->status, from
254 the numeric status that was returned by `wait'. */
256 Lisp_Object
status_convert ();
259 struct Lisp_Process
*p
;
261 union { int i
; WAITTYPE wt
; } u
;
262 u
.i
= XFASTINT (p
->raw_status_low
) + (XFASTINT (p
->raw_status_high
) << 16);
263 p
->status
= status_convert (u
.wt
);
264 p
->raw_status_low
= Qnil
;
265 p
->raw_status_high
= Qnil
;
268 /* Convert a process status word in Unix format to
269 the list that we use internally. */
276 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
277 else if (WIFEXITED (w
))
278 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
279 WCOREDUMP (w
) ? Qt
: Qnil
));
280 else if (WIFSIGNALED (w
))
281 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
282 WCOREDUMP (w
) ? Qt
: Qnil
));
287 /* Given a status-list, extract the three pieces of information
288 and store them individually through the three pointers. */
291 decode_status (l
, symbol
, code
, coredump
)
299 if (XTYPE (l
) == Lisp_Symbol
)
307 *symbol
= XCONS (l
)->car
;
308 tem
= XCONS (l
)->cdr
;
309 *code
= XFASTINT (XCONS (tem
)->car
);
310 tem
= XCONS (tem
)->cdr
;
311 *coredump
= !NILP (tem
);
315 /* Return a string describing a process status list. */
318 status_message (status
)
323 Lisp_Object string
, string2
;
325 decode_status (status
, &symbol
, &code
, &coredump
);
327 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
333 signame
= sys_siglist
[code
];
335 signame
= sys_errlist
[code
];
340 string
= build_string (signame
);
341 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
342 XSTRING (string
)->data
[0] = DOWNCASE (XSTRING (string
)->data
[0]);
343 return concat2 (string
, string2
);
345 else if (EQ (symbol
, Qexit
))
348 return build_string ("finished\n");
349 string
= Fnumber_to_string (make_number (code
));
350 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
351 return concat2 (build_string ("exited abnormally with code "),
352 concat2 (string
, string2
));
355 return Fcopy_sequence (Fsymbol_name (symbol
));
360 /* Open an available pty, returning a file descriptor.
361 Return -1 on failure.
362 The file name of the terminal corresponding to the pty
363 is left in the variable pty_name. */
374 /* Some systems name their pseudoterminals so that there are gaps in
375 the usual sequence - for example, on HP9000/S700 systems, there
376 are no pseudoterminals with names ending in 'f'. So we wait for
377 three failures in a row before deciding that we've reached the
379 int failed_count
= 0;
384 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
385 for (i
= 0; i
< 16; i
++)
388 #ifdef PTY_NAME_SPRINTF
391 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
392 #endif /* no PTY_NAME_SPRINTF */
396 #else /* no PTY_OPEN */
398 /* Unusual IRIS code */
399 *ptyv
= open ("/dev/ptc", O_RDWR
| O_NDELAY
, 0);
402 if (fstat (fd
, &stb
) < 0)
405 if (stat (pty_name
, &stb
) < 0)
408 if (failed_count
>= 3)
414 fd
= open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
416 fd
= open (pty_name
, O_RDWR
| O_NDELAY
, 0);
418 #endif /* not IRIS */
419 #endif /* no PTY_OPEN */
423 /* check to make certain that both sides are available
424 this avoids a nasty yet stupid bug in rlogins */
425 #ifdef PTY_TTY_NAME_SPRINTF
428 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
429 #endif /* no PTY_TTY_NAME_SPRINTF */
431 if (access (pty_name
, 6) != 0)
434 #if !defined(IRIS) && !defined(__sgi)
440 #endif /* not UNIPLUS */
447 #endif /* HAVE_PTYS */
453 register Lisp_Object val
, tem
, name1
;
454 register struct Lisp_Process
*p
;
458 /* size of process structure includes the vector header,
459 so deduct for that. But struct Lisp_Vector includes the first
460 element, thus deducts too much, so add it back. */
461 val
= Fmake_vector (make_number ((sizeof (struct Lisp_Process
)
462 - sizeof (struct Lisp_Vector
)
463 + sizeof (Lisp_Object
))
464 / sizeof (Lisp_Object
)),
466 XSETTYPE (val
, Lisp_Process
);
469 XSET (p
->infd
, Lisp_Int
, -1);
470 XSET (p
->outfd
, Lisp_Int
, -1);
471 XFASTINT (p
->pid
) = 0;
472 XFASTINT (p
->tick
) = 0;
473 XFASTINT (p
->update_tick
) = 0;
474 p
->raw_status_low
= Qnil
;
475 p
->raw_status_high
= Qnil
;
477 p
->mark
= Fmake_marker ();
479 /* If name is already in use, modify it until it is unused. */
484 tem
= Fget_process (name1
);
485 if (NILP (tem
)) break;
486 sprintf (suffix
, "<%d>", i
);
487 name1
= concat2 (name
, build_string (suffix
));
491 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
495 remove_process (proc
)
496 register Lisp_Object proc
;
498 register Lisp_Object pair
;
500 pair
= Frassq (proc
, Vprocess_alist
);
501 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
502 Fset_marker (XPROCESS (proc
)->mark
, Qnil
, Qnil
);
504 deactivate_process (proc
);
507 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
508 "Return t if OBJECT is a process.")
512 return XTYPE (obj
) == Lisp_Process
? Qt
: Qnil
;
515 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
516 "Return the process named NAME, or nil if there is none.")
518 register Lisp_Object name
;
520 if (XTYPE (name
) == Lisp_Process
)
522 CHECK_STRING (name
, 0);
523 return Fcdr (Fassoc (name
, Vprocess_alist
));
526 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
527 "Return the (or, a) process associated with BUFFER.\n\
528 BUFFER may be a buffer or the name of one.")
530 register Lisp_Object name
;
532 register Lisp_Object buf
, tail
, proc
;
534 if (NILP (name
)) return Qnil
;
535 buf
= Fget_buffer (name
);
536 if (NILP (buf
)) return Qnil
;
538 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
540 proc
= Fcdr (Fcar (tail
));
541 if (XTYPE (proc
) == Lisp_Process
&& EQ (XPROCESS (proc
)->buffer
, buf
))
547 /* This is how commands for the user decode process arguments. It
548 accepts a process, a process name, a buffer, a buffer name, or nil.
549 Buffers denote the first process in the buffer, and nil denotes the
554 register Lisp_Object name
;
556 register Lisp_Object proc
, obj
;
559 obj
= Fget_process (name
);
561 obj
= Fget_buffer (name
);
563 error ("Process %s does not exist", XSTRING (name
)->data
);
565 else if (NILP (name
))
566 obj
= Fcurrent_buffer ();
570 /* Now obj should be either a buffer object or a process object.
574 proc
= Fget_buffer_process (obj
);
576 error ("Buffer %s has no process", XSTRING (XBUFFER (obj
)->name
)->data
);
580 CHECK_PROCESS (obj
, 0);
586 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
587 "Delete PROCESS: kill it and forget about it immediately.\n\
588 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
589 nil, indicating the current buffer's process.")
591 register Lisp_Object proc
;
593 proc
= get_process (proc
);
594 XPROCESS (proc
)->raw_status_low
= Qnil
;
595 XPROCESS (proc
)->raw_status_high
= Qnil
;
596 if (NETCONN_P (proc
))
598 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
599 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
601 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
603 Fkill_process (proc
, Qnil
);
604 /* Do this now, since remove_process will make sigchld_handler do nothing. */
605 XPROCESS (proc
)->status
606 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
607 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
610 remove_process (proc
);
614 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
615 "Return the status of PROCESS: a symbol, one of these:\n\
616 run -- for a process that is running.\n\
617 stop -- for a process stopped but continuable.\n\
618 exit -- for a process that has exited.\n\
619 signal -- for a process that has got a fatal signal.\n\
620 open -- for a network stream connection that is open.\n\
621 closed -- for a network stream connection that is closed.\n\
622 nil -- if arg is a process name and no such process exists.\n\
623 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
624 nil, indicating the current buffer's process.")
626 register Lisp_Object proc
;
628 register struct Lisp_Process
*p
;
629 register Lisp_Object status
;
632 proc
= Fget_process (proc
);
634 proc
= get_process (proc
);
640 if (!NILP (p
->raw_status_low
))
643 if (XTYPE (status
) == Lisp_Cons
)
644 status
= XCONS (status
)->car
;
645 if (NETCONN_P (proc
))
647 if (EQ (status
, Qrun
))
649 else if (EQ (status
, Qexit
))
655 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
657 "Return the exit status of PROCESS or the signal number that killed it.\n\
658 If PROCESS has not yet exited or died, return 0.")
660 register Lisp_Object proc
;
662 CHECK_PROCESS (proc
, 0);
663 if (!NILP (XPROCESS (proc
)->raw_status_low
))
664 update_status (XPROCESS (proc
));
665 if (XTYPE (XPROCESS (proc
)->status
) == Lisp_Cons
)
666 return XCONS (XCONS (XPROCESS (proc
)->status
)->cdr
)->car
;
667 return make_number (0);
670 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
671 "Return the process id of PROCESS.\n\
672 This is the pid of the Unix process which PROCESS uses or talks to.\n\
673 For a network connection, this value is nil.")
675 register Lisp_Object proc
;
677 CHECK_PROCESS (proc
, 0);
678 return XPROCESS (proc
)->pid
;
681 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
682 "Return the name of PROCESS, as a string.\n\
683 This is the name of the program invoked in PROCESS,\n\
684 possibly modified to make it unique among process names.")
686 register Lisp_Object proc
;
688 CHECK_PROCESS (proc
, 0);
689 return XPROCESS (proc
)->name
;
692 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
693 "Return the command that was executed to start PROCESS.\n\
694 This is a list of strings, the first string being the program executed\n\
695 and the rest of the strings being the arguments given to it.\n\
696 For a non-child channel, this is nil.")
698 register Lisp_Object proc
;
700 CHECK_PROCESS (proc
, 0);
701 return XPROCESS (proc
)->command
;
704 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
706 "Set buffer associated with PROCESS to BUFFER (a buffer, or nil).")
708 register Lisp_Object proc
, buffer
;
710 CHECK_PROCESS (proc
, 0);
712 CHECK_BUFFER (buffer
, 1);
713 XPROCESS (proc
)->buffer
= buffer
;
717 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
719 "Return the buffer PROCESS is associated with.\n\
720 Output from PROCESS is inserted in this buffer\n\
721 unless PROCESS has a filter.")
723 register Lisp_Object proc
;
725 CHECK_PROCESS (proc
, 0);
726 return XPROCESS (proc
)->buffer
;
729 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
731 "Return the marker for the end of the last output from PROCESS.")
733 register Lisp_Object proc
;
735 CHECK_PROCESS (proc
, 0);
736 return XPROCESS (proc
)->mark
;
739 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
741 "Give PROCESS the filter function FILTER; nil means no filter.\n\
742 t means stop accepting output from the process.\n\
743 When a process has a filter, each time it does output\n\
744 the entire string of output is passed to the filter.\n\
745 The filter gets two arguments: the process and the string of output.\n\
746 If the process has a filter, its buffer is not used for output.")
748 register Lisp_Object proc
, filter
;
750 CHECK_PROCESS (proc
, 0);
752 FD_CLR (XINT (XPROCESS (proc
)->infd
), &input_wait_mask
);
753 else if (EQ (XPROCESS (proc
)->filter
, Qt
))
754 FD_SET (XINT (XPROCESS (proc
)->infd
), &input_wait_mask
);
755 XPROCESS (proc
)->filter
= filter
;
759 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
761 "Returns the filter function of PROCESS; nil if none.\n\
762 See `set-process-filter' for more info on filter functions.")
764 register Lisp_Object proc
;
766 CHECK_PROCESS (proc
, 0);
767 return XPROCESS (proc
)->filter
;
770 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
772 "Give PROCESS the sentinel SENTINEL; nil for none.\n\
773 The sentinel is called as a function when the process changes state.\n\
774 It gets two arguments: the process, and a string describing the change.")
776 register Lisp_Object proc
, sentinel
;
778 CHECK_PROCESS (proc
, 0);
779 XPROCESS (proc
)->sentinel
= sentinel
;
783 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
785 "Return the sentinel of PROCESS; nil if none.\n\
786 See `set-process-sentinel' for more info on sentinels.")
788 register Lisp_Object proc
;
790 CHECK_PROCESS (proc
, 0);
791 return XPROCESS (proc
)->sentinel
;
794 DEFUN ("set-process-window-size", Fset_process_window_size
,
795 Sset_process_window_size
, 3, 3, 0,
796 "Tell PROCESS that it has logical window size HEIGHT and WIDTH.")
797 (proc
, height
, width
)
798 register Lisp_Object proc
, height
, width
;
800 CHECK_PROCESS (proc
, 0);
801 CHECK_NATNUM (height
, 0);
802 CHECK_NATNUM (width
, 0);
803 if (set_window_size (XINT (XPROCESS (proc
)->infd
),
804 XINT (height
), XINT(width
)) <= 0)
810 DEFUN ("process-kill-without-query", Fprocess_kill_without_query
,
811 Sprocess_kill_without_query
, 1, 2, 0,
812 "Say no query needed if PROCESS is running when Emacs is exited.\n\
813 Optional second argument if non-nil says to require a query.\n\
814 Value is t if a query was formerly required.")
816 register Lisp_Object proc
, value
;
820 CHECK_PROCESS (proc
, 0);
821 tem
= XPROCESS (proc
)->kill_without_query
;
822 XPROCESS (proc
)->kill_without_query
= Fnull (value
);
827 #if 0 /* Turned off because we don't currently record this info
828 in the process. Perhaps add it. */
829 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
830 "Return the connection type of `PROCESS'.\n\
831 The value is `nil' for a pipe,\n\
832 `t' or `pty' for a pty, or `stream' for a socket connection.")
836 return XPROCESS (process
)->type
;
843 register Lisp_Object tail
, tem
;
844 Lisp_Object proc
, minspace
, tem1
;
845 register struct buffer
*old
= current_buffer
;
846 register struct Lisp_Process
*p
;
850 XFASTINT (minspace
) = 1;
852 set_buffer_internal (XBUFFER (Vstandard_output
));
853 Fbuffer_disable_undo (Vstandard_output
);
855 current_buffer
->truncate_lines
= Qt
;
858 Proc Status Buffer Command\n\
859 ---- ------ ------ -------\n", -1);
861 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
865 proc
= Fcdr (Fcar (tail
));
867 if (NILP (p
->childp
))
870 Finsert (1, &p
->name
);
871 Findent_to (make_number (13), minspace
);
873 if (!NILP (p
->raw_status_low
))
876 if (XTYPE (p
->status
) == Lisp_Cons
)
877 symbol
= XCONS (p
->status
)->car
;
880 if (EQ (symbol
, Qsignal
))
883 tem
= Fcar (Fcdr (p
->status
));
885 if (XINT (tem
) < NSIG
)
886 write_string (sys_errlist
[XINT (tem
)], -1);
889 Fprinc (symbol
, Qnil
);
891 else if (NETCONN_P (proc
))
893 if (EQ (symbol
, Qrun
))
894 write_string ("open", -1);
895 else if (EQ (symbol
, Qexit
))
896 write_string ("closed", -1);
898 Fprinc (symbol
, Qnil
);
901 Fprinc (symbol
, Qnil
);
903 if (EQ (symbol
, Qexit
))
906 tem
= Fcar (Fcdr (p
->status
));
909 sprintf (tembuf
, " %d", XFASTINT (tem
));
910 write_string (tembuf
, -1);
914 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
915 remove_process (proc
);
917 Findent_to (make_number (22), minspace
);
918 if (NILP (p
->buffer
))
919 insert_string ("(none)");
920 else if (NILP (XBUFFER (p
->buffer
)->name
))
921 insert_string ("(Killed)");
923 Finsert (1, &XBUFFER (p
->buffer
)->name
);
925 Findent_to (make_number (37), minspace
);
927 if (NETCONN_P (proc
))
929 sprintf (tembuf
, "(network stream connection to %s)\n",
930 XSTRING (p
->childp
)->data
);
931 insert_string (tembuf
);
945 insert_string ("\n");
951 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 0, "",
952 "Display a list of all processes.\n\
953 \(Any processes listed as Exited or Signaled are actually eliminated\n\
954 after the listing is made.)")
957 internal_with_output_to_temp_buffer ("*Process List*",
958 list_processes_1
, Qnil
);
962 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
963 "Return a list of all processes.")
966 return Fmapcar (Qcdr
, Vprocess_alist
);
969 /* Starting asynchronous inferior processes. */
971 static Lisp_Object
start_process_unwind ();
973 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
974 "Start a program in a subprocess. Return the process object for it.\n\
975 Args are NAME BUFFER PROGRAM &rest PROGRAM-ARGS\n\
976 NAME is name for process. It is modified if necessary to make it unique.\n\
977 BUFFER is the buffer or (buffer-name) to associate with the process.\n\
978 Process output goes at end of that buffer, unless you specify\n\
979 an output stream or filter function to handle the output.\n\
980 BUFFER may be also nil, meaning that this process is not associated\n\
982 Third arg is program file name. It is searched for as in the shell.\n\
983 Remaining arguments are strings to give program as arguments.")
986 register Lisp_Object
*args
;
988 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
990 register unsigned char *new_argv
;
993 register unsigned char **new_argv
;
996 int count
= specpdl_ptr
- specpdl
;
1000 buffer
= Fget_buffer_create (buffer
);
1002 /* Make sure that the child will be able to chdir to the current
1003 buffer's current directory, or its unhandled equivalent. We
1004 can't just have the child check for an error when it does the
1005 chdir, since it's in a vfork.
1007 We have to GCPRO around this because Fexpand_file_name and
1008 Funhandled_file_name_directory might call a file name handling
1009 function. The argument list is protected by the caller, so all
1010 we really have to worry about is buffer. */
1012 struct gcpro gcpro1
, gcpro2
;
1014 current_dir
= current_buffer
->directory
;
1016 GCPRO2 (buffer
, current_dir
);
1019 expand_and_dir_to_file
1020 (Funhandled_file_name_directory (current_dir
), Qnil
);
1021 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1022 report_file_error ("Setting current directory",
1023 Fcons (current_buffer
->directory
, Qnil
));
1029 CHECK_STRING (name
, 0);
1033 CHECK_STRING (program
, 2);
1036 /* Make a one member argv with all args concatenated
1037 together separated by a blank. */
1038 len
= XSTRING (program
)->size
+ 2;
1039 for (i
= 3; i
< nargs
; i
++)
1042 CHECK_STRING (tem
, i
);
1043 len
+= XSTRING (tem
)->size
+ 1; /* count the blank */
1045 new_argv
= (unsigned char *) alloca (len
);
1046 strcpy (new_argv
, XSTRING (program
)->data
);
1047 for (i
= 3; i
< nargs
; i
++)
1050 CHECK_STRING (tem
, i
);
1051 strcat (new_argv
, " ");
1052 strcat (new_argv
, XSTRING (tem
)->data
);
1054 /* Need to add code here to check for program existence on VMS */
1057 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1059 /* If program file name is not absolute, search our path for it */
1060 if (XSTRING (program
)->data
[0] != '/')
1062 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1065 GCPRO4 (name
, program
, buffer
, current_dir
);
1066 openp (Vexec_path
, program
, EXEC_SUFFIXES
, &tem
, 1);
1069 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1070 new_argv
[0] = XSTRING (tem
)->data
;
1073 new_argv
[0] = XSTRING (program
)->data
;
1075 for (i
= 3; i
< nargs
; i
++)
1078 CHECK_STRING (tem
, i
);
1079 new_argv
[i
- 2] = XSTRING (tem
)->data
;
1081 new_argv
[i
- 2] = 0;
1082 #endif /* not VMS */
1084 proc
= make_process (name
);
1085 /* If an error occurs and we can't start the process, we want to
1086 remove it from the process list. This means that each error
1087 check in create_process doesn't need to call remove_process
1088 itself; it's all taken care of here. */
1089 record_unwind_protect (start_process_unwind
, proc
);
1091 XPROCESS (proc
)->childp
= Qt
;
1092 XPROCESS (proc
)->command_channel_p
= Qnil
;
1093 XPROCESS (proc
)->buffer
= buffer
;
1094 XPROCESS (proc
)->sentinel
= Qnil
;
1095 XPROCESS (proc
)->filter
= Qnil
;
1096 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1098 create_process (proc
, new_argv
, current_dir
);
1100 return unbind_to (count
, proc
);
1103 /* This function is the unwind_protect form for Fstart_process. If
1104 PROC doesn't have its pid set, then we know someone has signalled
1105 an error and the process wasn't started successfully, so we should
1106 remove it from the process list. */
1108 start_process_unwind (proc
)
1111 if (XTYPE (proc
) != Lisp_Process
)
1114 /* Was PROC started successfully? */
1115 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1116 remove_process (proc
);
1123 create_process_1 (signo
)
1127 /* USG systems forget handlers when they are used;
1128 must reestablish each time */
1129 signal (signo
, create_process_1
);
1133 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1136 /* Mimic blocking of signals on system V, which doesn't really have it. */
1138 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1139 int sigchld_deferred
;
1142 create_process_sigchld ()
1144 signal (SIGCHLD
, create_process_sigchld
);
1146 sigchld_deferred
= 1;
1152 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1153 create_process (process
, new_argv
, current_dir
)
1154 Lisp_Object process
;
1156 Lisp_Object current_dir
;
1158 int pid
, inchannel
, outchannel
, forkin
, forkout
;
1161 SIGTYPE (*sigchld
)();
1164 extern char **environ
;
1166 inchannel
= outchannel
= -1;
1169 if (!NILP (Vprocess_connection_type
))
1170 outchannel
= inchannel
= allocate_pty ();
1175 /* On USG systems it does not work to open the pty's tty here
1176 and then close and reopen it in the child. */
1178 /* Don't let this terminal become our controlling terminal
1179 (in case we don't have one). */
1180 forkout
= forkin
= open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1182 forkout
= forkin
= open (pty_name
, O_RDWR
, 0);
1185 report_file_error ("Opening pty", Qnil
);
1187 forkin
= forkout
= -1;
1188 #endif /* not USG */
1192 #endif /* HAVE_PTYS */
1195 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1196 report_file_error ("Opening socketpair", Qnil
);
1197 outchannel
= inchannel
= sv
[0];
1198 forkout
= forkin
= sv
[1];
1200 #else /* not SKTPAIR */
1209 #endif /* not SKTPAIR */
1212 /* Replaced by close_process_descs */
1213 set_exclusive_use (inchannel
);
1214 set_exclusive_use (outchannel
);
1217 /* Stride people say it's a mystery why this is needed
1218 as well as the O_NDELAY, but that it fails without this. */
1219 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1222 ioctl (inchannel
, FIONBIO
, &one
);
1227 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1230 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1234 /* Record this as an active process, with its channels.
1235 As a result, child_setup will close Emacs's side of the pipes. */
1236 chan_process
[inchannel
] = process
;
1237 XSET (XPROCESS (process
)->infd
, Lisp_Int
, inchannel
);
1238 XSET (XPROCESS (process
)->outfd
, Lisp_Int
, outchannel
);
1239 /* Record the tty descriptor used in the subprocess. */
1241 XPROCESS (process
)->subtty
= Qnil
;
1243 XFASTINT (XPROCESS (process
)->subtty
) = forkin
;
1244 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1245 XPROCESS (process
)->status
= Qrun
;
1247 /* Delay interrupts until we have a chance to store
1248 the new fork's pid in its process structure */
1252 #else /* not BSD4_1 */
1253 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1254 sigsetmask (sigmask (SIGCHLD
));
1255 #else /* ordinary USG */
1257 sigchld_deferred
= 0;
1258 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1260 #endif /* ordinary USG */
1261 #endif /* not BSD4_1 */
1262 #endif /* SIGCHLD */
1264 FD_SET (inchannel
, &input_wait_mask
);
1265 if (inchannel
> max_process_desc
)
1266 max_process_desc
= inchannel
;
1268 /* Until we store the proper pid, enable sigchld_handler
1269 to recognize an unknown pid as standing for this process.
1270 It is very important not to let this `marker' value stay
1271 in the table after this function has returned; if it does
1272 it might cause call-process to hang and subsequent asynchronous
1273 processes to get their return values scrambled. */
1274 XSETINT (XPROCESS (process
)->pid
, -1);
1277 /* child_setup must clobber environ on systems with true vfork.
1278 Protect it from permanent change. */
1279 char **save_environ
= environ
;
1284 int xforkin
= forkin
;
1285 int xforkout
= forkout
;
1287 #if 0 /* This was probably a mistake--it duplicates code later on,
1288 but fails to handle all the cases. */
1289 /* Make sure SIGCHLD is not blocked in the child. */
1290 sigsetmask (SIGEMPTYMASK
);
1293 /* Make the pty be the controlling terminal of the process. */
1295 /* First, disconnect its current controlling terminal. */
1297 /* We tried doing setsid only if pty_flag, but it caused
1298 process_set_signal to fail on SGI when using a pipe. */
1300 /* Make the pty's terminal the controlling terminal. */
1304 /* We ignore the return value
1305 because faith@cs.unc.edu says that is necessary on Linux. */
1306 ioctl (xforkin
, TIOCSCTTY
, 0);
1309 #else /* not HAVE_SETSID */
1311 /* It's very important to call setpgrp here and no time
1312 afterwards. Otherwise, we lose our controlling tty which
1313 is set when we open the pty. */
1316 #endif /* not HAVE_SETSID */
1317 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1318 if (pty_flag
&& xforkin
>= 0)
1321 tcgetattr (xforkin
, &t
);
1323 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1324 write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1327 #if defined (NTTYDISC) && defined (TIOCSETD)
1328 if (pty_flag
&& xforkin
>= 0)
1330 /* Use new line discipline. */
1331 int ldisc
= NTTYDISC
;
1332 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1337 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1338 can do TIOCSPGRP only to the process's controlling tty. */
1341 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1342 I can't test it since I don't have 4.3. */
1343 int j
= open ("/dev/tty", O_RDWR
, 0);
1344 ioctl (j
, TIOCNOTTY
, 0);
1347 /* In order to get a controlling terminal on some versions
1348 of BSD, it is necessary to put the process in pgrp 0
1349 before it opens the terminal. */
1353 #endif /* TIOCNOTTY */
1355 #if !defined (RTU) && !defined (UNIPLUS)
1356 /*** There is a suggestion that this ought to be a
1357 conditional on TIOCSPGRP. */
1358 /* Now close the pty (if we had it open) and reopen it.
1359 This makes the pty the controlling terminal of the subprocess. */
1362 #ifdef SET_CHILD_PTY_PGRP
1363 int pgrp
= getpid ();
1366 /* I wonder if close (open (pty_name, ...)) would work? */
1369 xforkout
= xforkin
= open (pty_name
, O_RDWR
, 0);
1371 #ifdef SET_CHILD_PTY_PGRP
1372 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1373 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1379 #endif /* not UNIPLUS and not RTU */
1380 #ifdef SETUP_SLAVE_PTY
1385 #endif /* SETUP_SLAVE_PTY */
1387 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1388 Now reenable it in the child, so it will die when we want it to. */
1390 signal (SIGHUP
, SIG_DFL
);
1392 #endif /* HAVE_PTYS */
1397 #else /* not BSD4_1 */
1398 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1399 sigsetmask (SIGEMPTYMASK
);
1400 #else /* ordinary USG */
1402 signal (SIGCHLD
, sigchld
);
1404 #endif /* ordinary USG */
1405 #endif /* not BSD4_1 */
1406 #endif /* SIGCHLD */
1409 child_setup_tty (xforkout
);
1410 child_setup (xforkin
, xforkout
, xforkout
,
1411 new_argv
, 1, current_dir
);
1413 environ
= save_environ
;
1420 if (forkin
!= forkout
&& forkout
>= 0)
1422 report_file_error ("Doing vfork", Qnil
);
1425 XFASTINT (XPROCESS (process
)->pid
) = pid
;
1427 /* If the subfork execv fails, and it exits,
1428 this close hangs. I don't know why.
1429 So have an interrupt jar it loose. */
1431 signal (SIGALRM
, create_process_1
);
1433 XPROCESS (process
)->subtty
= Qnil
;
1438 if (forkin
!= forkout
&& forkout
>= 0)
1444 #else /* not BSD4_1 */
1445 #if defined (BSD) || defined (UNIPLUS) || defined (HPUX)
1446 sigsetmask (SIGEMPTYMASK
);
1447 #else /* ordinary USG */
1449 signal (SIGCHLD
, sigchld
);
1450 /* Now really handle any of these signals
1451 that came in during this function. */
1452 if (sigchld_deferred
)
1453 kill (getpid (), SIGCHLD
);
1455 #endif /* ordinary USG */
1456 #endif /* not BSD4_1 */
1457 #endif /* SIGCHLD */
1459 #endif /* not VMS */
1463 /* open a TCP network connection to a given HOST/SERVICE. Treated
1464 exactly like a normal process when reading and writing. Only
1465 differences are in status display and process deletion. A network
1466 connection has no PID; you cannot signal it. All you can do is
1467 deactivate and close it via delete-process */
1469 DEFUN ("open-network-stream", Fopen_network_stream
, Sopen_network_stream
,
1471 "Open a TCP connection for a service to a host.\n\
1472 Returns a subprocess-object to represent the connection.\n\
1473 Input and output work as for subprocesses; `delete-process' closes it.\n\
1474 Args are NAME BUFFER HOST SERVICE.\n\
1475 NAME is name for process. It is modified if necessary to make it unique.\n\
1476 BUFFER is the buffer (or buffer-name) to associate with the process.\n\
1477 Process output goes at end of that buffer, unless you specify\n\
1478 an output stream or filter function to handle the output.\n\
1479 BUFFER may be also nil, meaning that this process is not associated\n\
1481 Third arg is name of the host to connect to, or its IP address.\n\
1482 Fourth arg SERVICE is name of the service desired, or an integer\n\
1483 specifying a port number to connect to.")
1484 (name
, buffer
, host
, service
)
1485 Lisp_Object name
, buffer
, host
, service
;
1489 struct sockaddr_in address
;
1490 struct servent
*svc_info
;
1491 struct hostent
*host_info_ptr
, host_info
;
1492 char *(addr_list
[2]);
1493 IN_ADDR numeric_addr
;
1497 struct hostent host_info_fixed
;
1498 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1500 int count
= specpdl_ptr
- specpdl
;
1502 GCPRO4 (name
, buffer
, host
, service
);
1503 CHECK_STRING (name
, 0);
1504 CHECK_STRING (host
, 0);
1505 if (XTYPE (service
) == Lisp_Int
)
1506 port
= htons ((unsigned short) XINT (service
));
1509 CHECK_STRING (service
, 0);
1510 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
1512 error ("Unknown service \"%s\"", XSTRING (service
)->data
);
1513 port
= svc_info
->s_port
;
1517 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
1518 if (host_info_ptr
== 0)
1519 /* Attempt to interpret host as numeric inet address */
1521 numeric_addr
= inet_addr ((char *) XSTRING (host
)->data
);
1522 if (NUMERIC_ADDR_ERROR
)
1523 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
1525 host_info_ptr
= &host_info
;
1526 host_info
.h_name
= 0;
1527 host_info
.h_aliases
= 0;
1528 host_info
.h_addrtype
= AF_INET
;
1530 /* Older machines have only one address slot called h_addr.
1531 Newer machines have h_addr_list, but #define h_addr to
1532 be its first element. */
1533 host_info
.h_addr_list
= &(addr_list
[0]);
1535 host_info
.h_addr
= (char*)(&numeric_addr
);
1537 host_info
.h_length
= strlen (addr_list
[0]);
1540 bzero (&address
, sizeof address
);
1541 bcopy (host_info_ptr
->h_addr
, (char *) &address
.sin_addr
,
1542 host_info_ptr
->h_length
);
1543 address
.sin_family
= host_info_ptr
->h_addrtype
;
1544 address
.sin_port
= port
;
1546 s
= socket (host_info_ptr
->h_addrtype
, SOCK_STREAM
, 0);
1548 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1550 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
1551 when connect is interrupted. So let's not let it get interrupted.
1552 Note we do not turn off polling, because polling is only used
1553 when not interrupt_input, and thus not normally used on the systems
1554 which have this bug. On systems which use polling, there's no way
1555 to quit if polling is turned off. */
1556 if (interrupt_input
)
1559 /* Slow down polling to every ten seconds.
1560 Some kernels have a bug which causes retrying connect to fail
1562 #ifdef POLL_FOR_INPUT
1563 bind_polling_period (10);
1567 if (connect (s
, (struct sockaddr
*) &address
, sizeof address
) == -1
1568 && errno
!= EISCONN
)
1574 if (errno
== EADDRINUSE
&& retry
< 20)
1582 if (interrupt_input
)
1586 report_file_error ("connection failed",
1587 Fcons (host
, Fcons (name
, Qnil
)));
1590 #ifdef POLL_FOR_INPUT
1591 unbind_to (count
, Qnil
);
1594 if (interrupt_input
)
1598 s
= connect_server (0);
1600 report_file_error ("error creating socket", Fcons (name
, Qnil
));
1601 send_command (s
, C_PORT
, 0, "%s:%d", XSTRING (host
)->data
, ntohs (port
));
1602 send_command (s
, C_DUMB
, 1, 0);
1608 report_file_error ("error duplicating socket", Fcons (name
, Qnil
));
1611 buffer
= Fget_buffer_create (buffer
);
1612 proc
= make_process (name
);
1614 chan_process
[inch
] = proc
;
1617 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
1620 fcntl (inch
, F_SETFL
, O_NDELAY
);
1624 XPROCESS (proc
)->childp
= host
;
1625 XPROCESS (proc
)->command_channel_p
= Qnil
;
1626 XPROCESS (proc
)->buffer
= buffer
;
1627 XPROCESS (proc
)->sentinel
= Qnil
;
1628 XPROCESS (proc
)->filter
= Qnil
;
1629 XPROCESS (proc
)->command
= Qnil
;
1630 XPROCESS (proc
)->pid
= Qnil
;
1631 XSET (XPROCESS (proc
)->infd
, Lisp_Int
, s
);
1632 XSET (XPROCESS (proc
)->outfd
, Lisp_Int
, outch
);
1633 XPROCESS (proc
)->status
= Qrun
;
1634 FD_SET (inch
, &input_wait_mask
);
1635 if (inch
> max_process_desc
)
1636 max_process_desc
= inch
;
1641 #endif /* HAVE_SOCKETS */
1643 deactivate_process (proc
)
1646 register int inchannel
, outchannel
;
1647 register struct Lisp_Process
*p
= XPROCESS (proc
);
1649 inchannel
= XINT (p
->infd
);
1650 outchannel
= XINT (p
->outfd
);
1654 /* Beware SIGCHLD hereabouts. */
1655 flush_pending_output (inchannel
);
1658 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
1659 sys$
dassgn (outchannel
);
1660 vs
= get_vms_process_pointer (p
->pid
);
1662 give_back_vms_process_stuff (vs
);
1666 if (outchannel
>= 0 && outchannel
!= inchannel
)
1670 XSET (p
->infd
, Lisp_Int
, -1);
1671 XSET (p
->outfd
, Lisp_Int
, -1);
1672 chan_process
[inchannel
] = Qnil
;
1673 FD_CLR (inchannel
, &input_wait_mask
);
1674 if (inchannel
== max_process_desc
)
1677 /* We just closed the highest-numbered process input descriptor,
1678 so recompute the highest-numbered one now. */
1679 max_process_desc
= 0;
1680 for (i
= 0; i
< MAXDESC
; i
++)
1681 if (!NILP (chan_process
[i
]))
1682 max_process_desc
= i
;
1687 /* Close all descriptors currently in use for communication
1688 with subprocess. This is used in a newly-forked subprocess
1689 to get rid of irrelevant descriptors. */
1691 close_process_descs ()
1694 for (i
= 0; i
< MAXDESC
; i
++)
1696 Lisp_Object process
;
1697 process
= chan_process
[i
];
1698 if (!NILP (process
))
1700 int in
= XINT (XPROCESS (process
)->infd
);
1701 int out
= XINT (XPROCESS (process
)->outfd
);
1704 if (out
>= 0 && in
!= out
)
1710 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
1712 "Allow any pending output from subprocesses to be read by Emacs.\n\
1713 It is read into the process' buffers or given to their filter functions.\n\
1714 Non-nil arg PROCESS means do not return until some output has been received\n\
1716 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of\n\
1717 seconds and microseconds to wait; return after that much time whether\n\
1718 or not there is input.\n\
1719 Return non-nil iff we received any output before the timeout expired.")
1720 (proc
, timeout
, timeout_msecs
)
1721 register Lisp_Object proc
, timeout
, timeout_msecs
;
1726 if (! NILP (timeout_msecs
))
1728 CHECK_NUMBER (timeout_msecs
, 2);
1729 useconds
= XINT (timeout_msecs
);
1730 if (XTYPE (timeout
) != Lisp_Int
)
1731 XSET (timeout
, Lisp_Int
, 0);
1734 int carry
= useconds
/ 1000000;
1736 XSETINT (timeout
, XINT (timeout
) + carry
);
1737 useconds
-= carry
* 1000000;
1739 /* I think this clause is necessary because C doesn't
1740 guarantee a particular rounding direction for negative
1744 XSETINT (timeout
, XINT (timeout
) - 1);
1745 useconds
+= 1000000;
1752 if (! NILP (timeout
))
1754 CHECK_NUMBER (timeout
, 1);
1755 seconds
= XINT (timeout
);
1768 XFASTINT (proc
) = 0;
1771 (wait_reading_process_input (seconds
, useconds
, proc
, 0)
1775 /* This variable is different from waiting_for_input in keyboard.c.
1776 It is used to communicate to a lisp process-filter/sentinel (via the
1777 function Fwaiting_for_user_input_p below) whether emacs was waiting
1778 for user-input when that process-filter was called.
1779 waiting_for_input cannot be used as that is by definition 0 when
1780 lisp code is being evalled */
1781 static int waiting_for_user_input_p
;
1783 /* Read and dispose of subprocess output while waiting for timeout to
1784 elapse and/or keyboard input to be available.
1787 timeout in seconds, or
1788 zero for no limit, or
1789 -1 means gobble data immediately available but don't wait for any.
1792 an additional duration to wait, measured in microseconds.
1793 If this is nonzero and time_limit is 0, then the timeout
1794 consists of MICROSECS only.
1796 READ_KBD is a lisp value:
1797 0 to ignore keyboard input, or
1798 1 to return when input is available, or
1799 -1 meaning caller will actually read the input, so don't throw to
1800 the quit handler, or
1801 a cons cell, meaning wait until its car is non-nil
1802 (and gobble terminal input into the buffer if any arrives), or
1803 a process object, meaning wait until something arrives from that
1804 process. The return value is true iff we read some input from
1807 DO_DISPLAY != 0 means redisplay should be done to show subprocess
1808 output that arrives.
1810 If READ_KBD is a pointer to a struct Lisp_Process, then the
1811 function returns true iff we received input from that process
1812 before the timeout elapsed.
1813 Otherwise, return true iff we received input from any process. */
1815 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
1816 int time_limit
, microsecs
;
1817 Lisp_Object read_kbd
;
1820 register int channel
, nfds
, m
;
1821 static SELECT_TYPE Available
;
1824 EMACS_TIME timeout
, end_time
, garbage
;
1826 int wait_channel
= -1;
1827 struct Lisp_Process
*wait_proc
= 0;
1828 int got_some_input
= 0;
1829 Lisp_Object
*wait_for_cell
= 0;
1831 FD_ZERO (&Available
);
1833 /* If read_kbd is a process to watch, set wait_proc and wait_channel
1835 if (XTYPE (read_kbd
) == Lisp_Process
)
1837 wait_proc
= XPROCESS (read_kbd
);
1838 wait_channel
= XINT (wait_proc
->infd
);
1839 XFASTINT (read_kbd
) = 0;
1842 /* If waiting for non-nil in a cell, record where. */
1843 if (XTYPE (read_kbd
) == Lisp_Cons
)
1845 wait_for_cell
= &XCONS (read_kbd
)->car
;
1846 XFASTINT (read_kbd
) = 0;
1849 waiting_for_user_input_p
= XINT (read_kbd
);
1851 /* Since we may need to wait several times,
1852 compute the absolute time to return at. */
1853 if (time_limit
|| microsecs
)
1855 EMACS_GET_TIME (end_time
);
1856 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
1857 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
1860 /* It would not be safe to call this below,
1861 where we call redisplay_preserve_echo_area. */
1862 if (do_display
&& frame_garbaged
)
1863 prepare_menu_bars ();
1867 /* If calling from keyboard input, do not quit
1868 since we want to return C-g as an input character.
1869 Otherwise, do pending quit if requested. */
1870 if (XINT (read_kbd
) >= 0)
1873 /* Exit now if the cell we're waiting for became non-nil. */
1874 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
1877 /* Compute time from now till when time limit is up */
1878 /* Exit if already run out */
1879 if (time_limit
== -1)
1881 /* -1 specified for timeout means
1882 gobble output available now
1883 but don't wait at all. */
1885 EMACS_SET_SECS_USECS (timeout
, 0, 0);
1887 else if (time_limit
|| microsecs
)
1889 EMACS_GET_TIME (timeout
);
1890 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
1891 if (EMACS_TIME_NEG_P (timeout
))
1896 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
1899 /* Cause C-g and alarm signals to take immediate action,
1900 and cause input available signals to zero out timeout.
1902 It is important that we do this before checking for process
1903 activity. If we get a SIGCHLD after the explicit checks for
1904 process activity, timeout is the only way we will know. */
1905 if (XINT (read_kbd
) < 0)
1906 set_waiting_for_input (&timeout
);
1908 /* If status of something has changed, and no input is
1909 available, notify the user of the change right away. After
1910 this explicit check, we'll let the SIGCHLD handler zap
1911 timeout to get our attention. */
1912 if (update_tick
!= process_tick
&& do_display
)
1914 Atemp
= input_wait_mask
;
1915 EMACS_SET_SECS_USECS (timeout
, 0, 0);
1916 if (select (MAXDESC
, &Atemp
, 0, 0, &timeout
) <= 0)
1918 /* It's okay for us to do this and then continue with
1919 the loop, since timeout has already been zeroed out. */
1920 clear_waiting_for_input ();
1925 /* Don't wait for output from a non-running process. */
1926 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
1927 update_status (wait_proc
);
1929 && ! EQ (wait_proc
->status
, Qrun
))
1931 clear_waiting_for_input ();
1935 /* Wait till there is something to do */
1937 Available
= input_wait_mask
;
1938 /* We used to have && wait_for_cell == 0
1939 but that led to lossage handling selection_request events:
1940 within one, we would start to handle another. */
1941 if (! XINT (read_kbd
))
1942 FD_CLR (keyboard_descriptor
, &Available
);
1944 /* If frame size has changed or the window is newly mapped,
1945 redisplay now, before we start to wait. There is a race
1946 condition here; if a SIGIO arrives between now and the select
1947 and indicates that a frame is trashed, the select may block
1948 displaying a trashed screen. */
1949 if (frame_garbaged
&& do_display
)
1950 redisplay_preserve_echo_area ();
1952 if (XINT (read_kbd
) && detect_input_pending ())
1955 FD_ZERO (&Available
);
1958 nfds
= select (MAXDESC
, &Available
, 0, 0, &timeout
);
1962 /* Make C-g and alarm signals set flags again */
1963 clear_waiting_for_input ();
1965 /* If we woke up due to SIGWINCH, actually change size now. */
1966 do_pending_window_change ();
1968 if (time_limit
&& nfds
== 0) /* timeout elapsed */
1972 if (xerrno
== EINTR
)
1973 FD_ZERO (&Available
);
1975 /* Ultrix select seems to return ENOMEM when it is
1976 interrupted. Treat it just like EINTR. Bleah. Note
1977 that we want to test for the "ultrix" CPP symbol, not
1978 "__ultrix__"; the latter is only defined under GCC, but
1979 not by DEC's bundled CC. -JimB */
1980 else if (xerrno
== ENOMEM
)
1981 FD_ZERO (&Available
);
1984 /* This happens for no known reason on ALLIANT.
1985 I am guessing that this is the right response. -- RMS. */
1986 else if (xerrno
== EFAULT
)
1987 FD_ZERO (&Available
);
1989 else if (xerrno
== EBADF
)
1992 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
1993 the child's closure of the pts gives the parent a SIGHUP, and
1994 the ptc file descriptor is automatically closed,
1995 yielding EBADF here or at select() call above.
1996 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
1997 in m/ibmrt-aix.h), and here we just ignore the select error.
1998 Cleanup occurs c/o status_notify after SIGCLD. */
1999 FD_ZERO (&Available
); /* Cannot depend on values returned */
2005 error("select error: %s", strerror (xerrno
));
2007 #if defined(sun) && !defined(USG5_4)
2008 else if (nfds
> 0 && FD_ISSET (keyboard_descriptor
, &Available
)
2010 /* System sometimes fails to deliver SIGIO.
2012 David J. Mackenzie says that Emacs doesn't compile under
2013 Solaris if this code is enabled, thus the USG5_4 in the CPP
2014 conditional. "I haven't noticed any ill effects so far.
2015 If you find a Solaris expert somewhere, they might know
2017 kill (getpid (), SIGIO
);
2020 /* Check for keyboard input */
2021 /* If there is any, return immediately
2022 to give it higher priority than subprocesses */
2024 /* We used to do this if wait_for_cell,
2025 but that caused infinite recursion in selection request events. */
2026 if ((XINT (read_kbd
))
2027 && detect_input_pending ())
2030 if (detect_input_pending ())
2034 /* Exit now if the cell we're waiting for became non-nil. */
2035 if (wait_for_cell
&& ! NILP (*wait_for_cell
))
2039 /* If we think we have keyboard input waiting, but didn't get SIGIO
2040 go read it. This can happen with X on BSD after logging out.
2041 In that case, there really is no input and no SIGIO,
2042 but select says there is input. */
2044 if (XINT (read_kbd
) && interrupt_input
2045 && (FD_ISSET (keyboard_descriptor
, &Available
)))
2050 got_some_input
|= nfds
> 0;
2052 /* If checking input just got us a size-change event from X,
2053 obey it now if we should. */
2054 if (XINT (read_kbd
) || wait_for_cell
)
2055 do_pending_window_change ();
2057 /* Check for data from a process. */
2058 /* Really FIRST_PROC_DESC should be 0 on Unix,
2059 but this is safer in the short run. */
2060 for (channel
= keyboard_descriptor
== 0 ? FIRST_PROC_DESC
: 0;
2061 channel
<= max_process_desc
; channel
++)
2063 if (FD_ISSET (channel
, &Available
))
2067 /* If waiting for this channel, arrange to return as
2068 soon as no more input to be processed. No more
2070 if (wait_channel
== channel
)
2076 proc
= chan_process
[channel
];
2080 /* Read data from the process, starting with our
2081 buffered-ahead character if we have one. */
2083 nread
= read_process_output (proc
, channel
);
2086 /* Since read_process_output can run a filter,
2087 which can call accept-process-output,
2088 don't try to read from any other processes
2089 before doing the select again. */
2090 FD_ZERO (&Available
);
2093 redisplay_preserve_echo_area ();
2096 else if (nread
== -1 && errno
== EWOULDBLOCK
)
2100 else if (nread
== -1 && errno
== EAGAIN
)
2104 else if (nread
== -1 && errno
== EAGAIN
)
2106 /* Note that we cannot distinguish between no input
2107 available now and a closed pipe.
2108 With luck, a closed pipe will be accompanied by
2109 subprocess termination and SIGCHLD. */
2110 else if (nread
== 0 && !NETCONN_P (proc
))
2112 #endif /* O_NDELAY */
2113 #endif /* O_NONBLOCK */
2114 #endif /* EWOULDBLOCK */
2116 /* On some OSs with ptys, when the process on one end of
2117 a pty exits, the other end gets an error reading with
2118 errno = EIO instead of getting an EOF (0 bytes read).
2119 Therefore, if we get an error reading and errno =
2120 EIO, just continue, because the child process has
2121 exited and should clean itself up soon (e.g. when we
2123 else if (nread
== -1 && errno
== EIO
)
2125 #endif /* HAVE_PTYS */
2126 /* If we can detect process termination, don't consider the process
2127 gone just because its pipe is closed. */
2129 else if (nread
== 0 && !NETCONN_P (proc
))
2134 /* Preserve status of processes already terminated. */
2135 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2136 deactivate_process (proc
);
2137 if (!NILP (XPROCESS (proc
)->raw_status_low
))
2138 update_status (XPROCESS (proc
));
2139 if (EQ (XPROCESS (proc
)->status
, Qrun
))
2140 XPROCESS (proc
)->status
2141 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2144 } /* end for each file descriptor */
2145 } /* end while exit conditions not met */
2147 /* If calling from keyboard input, do not quit
2148 since we want to return C-g as an input character.
2149 Otherwise, do pending quit if requested. */
2150 if (XINT (read_kbd
) >= 0)
2152 /* Prevent input_pending from remaining set if we quit. */
2153 clear_input_pending ();
2157 return got_some_input
;
2160 /* Read pending output from the process channel,
2161 starting with our buffered-ahead character if we have one.
2162 Yield number of characters read.
2164 This function reads at most 1024 characters.
2165 If you want to read all available subprocess output,
2166 you must call it repeatedly until it returns zero. */
2168 read_process_output (proc
, channel
)
2170 register int channel
;
2172 register int nchars
;
2178 register Lisp_Object outstream
;
2179 register struct buffer
*old
= current_buffer
;
2180 register struct Lisp_Process
*p
= XPROCESS (proc
);
2181 register int opoint
;
2184 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2186 vs
= get_vms_process_pointer (p
->pid
);
2190 return(0); /* Really weird if it does this */
2191 if (!(vs
->iosb
[0] & 1))
2192 return -1; /* I/O error */
2195 error ("Could not get VMS process pointer");
2196 chars
= vs
->inputBuffer
;
2197 nchars
= clean_vms_buffer (chars
, vs
->iosb
[1]);
2200 start_vms_process_read (vs
); /* Crank up the next read on the process */
2201 return 1; /* Nothing worth printing, say we got 1 */
2205 if (proc_buffered_char
[channel
] < 0)
2206 nchars
= read (channel
, chars
, sizeof chars
);
2209 chars
[0] = proc_buffered_char
[channel
];
2210 proc_buffered_char
[channel
] = -1;
2211 nchars
= read (channel
, chars
+ 1, sizeof chars
- 1);
2215 nchars
= nchars
+ 1;
2217 #endif /* not VMS */
2219 if (nchars
<= 0) return nchars
;
2221 outstream
= p
->filter
;
2222 if (!NILP (outstream
))
2224 /* We inhibit quit here instead of just catching it so that
2225 hitting ^G when a filter happens to be running won't screw
2227 int count
= specpdl_ptr
- specpdl
;
2228 Lisp_Object odeactivate
;
2229 Lisp_Object obuffer
;
2231 odeactivate
= Vdeactivate_mark
;
2232 obuffer
= Fcurrent_buffer ();
2234 specbind (Qinhibit_quit
, Qt
);
2235 specbind (Qlast_nonmenu_event
, Qt
);
2236 call2 (outstream
, proc
, make_string (chars
, nchars
));
2238 /* Handling the process output should not deactivate the mark. */
2239 Vdeactivate_mark
= odeactivate
;
2241 if (! EQ (Fcurrent_buffer (), obuffer
))
2242 record_asynch_buffer_change ();
2244 if (waiting_for_user_input_p
)
2245 prepare_menu_bars ();
2248 start_vms_process_read (vs
);
2250 unbind_to (count
, Qnil
);
2254 /* If no filter, write into buffer if it isn't dead. */
2255 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
2257 Lisp_Object old_read_only
;
2258 Lisp_Object old_begv
, old_zv
;
2259 Lisp_Object odeactivate
;
2261 odeactivate
= Vdeactivate_mark
;
2263 Fset_buffer (p
->buffer
);
2265 old_read_only
= current_buffer
->read_only
;
2266 XFASTINT (old_begv
) = BEGV
;
2267 XFASTINT (old_zv
) = ZV
;
2269 current_buffer
->read_only
= Qnil
;
2271 /* Insert new output into buffer
2272 at the current end-of-output marker,
2273 thus preserving logical ordering of input and output. */
2274 if (XMARKER (p
->mark
)->buffer
)
2275 SET_PT (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
));
2279 /* If the output marker is outside of the visible region, save
2280 the restriction and widen. */
2281 if (! (BEGV
<= point
&& point
<= ZV
))
2284 /* Make sure opoint floats ahead of any new text, just as point
2286 if (point
<= opoint
)
2289 /* Insert after old_begv, but before old_zv. */
2290 if (point
< XFASTINT (old_begv
))
2291 XFASTINT (old_begv
) += nchars
;
2292 if (point
<= XFASTINT (old_zv
))
2293 XFASTINT (old_zv
) += nchars
;
2295 /* Insert before markers in case we are inserting where
2296 the buffer's mark is, and the user's next command is Meta-y. */
2297 insert_before_markers (chars
, nchars
);
2298 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
2300 update_mode_lines
++;
2302 /* If the restriction isn't what it should be, set it. */
2303 if (XFASTINT (old_begv
) != BEGV
|| XFASTINT (old_zv
) != ZV
)
2304 Fnarrow_to_region (old_begv
, old_zv
);
2306 /* Handling the process output should not deactivate the mark. */
2307 Vdeactivate_mark
= odeactivate
;
2309 current_buffer
->read_only
= old_read_only
;
2311 set_buffer_internal (old
);
2314 start_vms_process_read (vs
);
2319 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
2321 "Returns non-nil if emacs is waiting for input from the user.\n\
2322 This is intended for use by asynchronous process output filters and sentinels.")
2325 return (waiting_for_user_input_p
? Qt
: Qnil
);
2328 /* Sending data to subprocess */
2330 jmp_buf send_process_frame
;
2333 send_process_trap ()
2339 longjmp (send_process_frame
, 1);
2342 /* Send some data to process PROC.
2343 BUF is the beginning of the data; LEN is the number of characters.
2344 OBJECT is the Lisp object that the data comes from. */
2346 send_process (proc
, buf
, len
, object
)
2352 /* Don't use register vars; longjmp can lose them. */
2354 unsigned char *procname
= XSTRING (XPROCESS (proc
)->name
)->data
;
2357 struct Lisp_Process
*p
= XPROCESS (proc
);
2358 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
2361 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2362 update_status (XPROCESS (proc
));
2363 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2364 error ("Process %s not running", procname
);
2367 vs
= get_vms_process_pointer (p
->pid
);
2369 error ("Could not find this process: %x", p
->pid
);
2370 else if (write_to_vms_process (vs
, buf
, len
))
2374 if (pty_max_bytes
== 0)
2376 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
2377 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
2379 if (pty_max_bytes
< 0)
2380 pty_max_bytes
= 250;
2382 pty_max_bytes
= 250;
2384 /* Deduct one, to leave space for the eof. */
2388 if (!setjmp (send_process_frame
))
2392 SIGTYPE (*old_sigpipe
)();
2395 /* Decide how much data we can send in one batch.
2396 Long lines need to be split into multiple batches. */
2397 if (!NILP (XPROCESS (proc
)->pty_flag
))
2399 /* Starting this at zero is always correct when not the first iteration
2400 because the previous iteration ended by sending C-d.
2401 It may not be correct for the first iteration
2402 if a partial line was sent in a separate send_process call.
2403 If that proves worth handling, we need to save linepos
2404 in the process object. */
2407 char *end
= buf
+ len
;
2409 /* Scan through this text for a line that is too long. */
2410 while (ptr
!= end
&& linepos
< pty_max_bytes
)
2418 /* If we found one, break the line there
2419 and put in a C-d to force the buffer through. */
2423 /* Send this batch, using one or more write calls. */
2426 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
2427 rv
= write (XINT (XPROCESS (proc
)->outfd
), buf
, this);
2428 signal (SIGPIPE
, old_sigpipe
);
2434 || errno
== EWOULDBLOCK
2440 /* Buffer is full. Wait, accepting input;
2441 that may allow the program
2442 to finish doing output and read more. */
2447 /* Running filters might relocate buffers or strings.
2448 Arrange to relocate BUF. */
2449 if (BUFFERP (object
))
2450 offset
= BUF_PTR_CHAR_POS (XBUFFER (object
),
2451 (unsigned char *) buf
);
2452 else if (STRINGP (object
))
2453 offset
= buf
- (char *) XSTRING (object
)->data
;
2455 XFASTINT (zero
) = 0;
2456 wait_reading_process_input (1, 0, zero
, 0);
2458 if (BUFFERP (object
))
2459 buf
= (char *) BUF_CHAR_ADDRESS (XBUFFER (object
), offset
);
2460 else if (STRINGP (object
))
2461 buf
= offset
+ (char *) XSTRING (object
)->data
;
2466 /* This is a real error. */
2467 report_file_error ("writing to process", Fcons (proc
, Qnil
));
2474 /* If we sent just part of the string, put in an EOF
2475 to force it through, before we send the rest. */
2477 Fprocess_send_eof (proc
);
2482 XPROCESS (proc
)->raw_status_low
= Qnil
;
2483 XPROCESS (proc
)->raw_status_high
= Qnil
;
2484 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
2485 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
2486 deactivate_process (proc
);
2488 error ("Error writing to process %s; closed it", procname
);
2490 error ("SIGPIPE raised on process %s; closed it", procname
);
2495 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
2497 "Send current contents of region as input to PROCESS.\n\
2498 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2499 nil, indicating the current buffer's process.\n\
2500 Called from program, takes three arguments, PROCESS, START and END.\n\
2501 If the region is more than 500 characters long,\n\
2502 it is sent in several bunches. This may happen even for shorter regions.\n\
2503 Output from processes can arrive in between bunches.")
2504 (process
, start
, end
)
2505 Lisp_Object process
, start
, end
;
2510 proc
= get_process (process
);
2511 validate_region (&start
, &end
);
2513 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
2516 start1
= XINT (start
);
2517 send_process (proc
, &FETCH_CHAR (start1
), XINT (end
) - XINT (start
),
2518 Fcurrent_buffer ());
2523 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
2525 "Send PROCESS the contents of STRING as input.\n\
2526 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2527 nil, indicating the current buffer's process.\n\
2528 If STRING is more than 500 characters long,\n\
2529 it is sent in several bunches. This may happen even for shorter strings.\n\
2530 Output from processes can arrive in between bunches.")
2532 Lisp_Object process
, string
;
2535 CHECK_STRING (string
, 1);
2536 proc
= get_process (process
);
2537 send_process (proc
, XSTRING (string
)->data
, XSTRING (string
)->size
, string
);
2541 /* send a signal number SIGNO to PROCESS.
2542 CURRENT_GROUP means send to the process group that currently owns
2543 the terminal being used to communicate with PROCESS.
2544 This is used for various commands in shell mode.
2545 If NOMSG is zero, insert signal-announcements into process's buffers
2548 If we can, we try to signal PROCESS by sending control characters
2549 down the pty. This allows us to signal inferiors who have changed
2550 their uid, for which killpg would return an EPERM error. */
2553 process_send_signal (process
, signo
, current_group
, nomsg
)
2554 Lisp_Object process
;
2556 Lisp_Object current_group
;
2560 register struct Lisp_Process
*p
;
2564 proc
= get_process (process
);
2565 p
= XPROCESS (proc
);
2567 if (!EQ (p
->childp
, Qt
))
2568 error ("Process %s is not a subprocess",
2569 XSTRING (p
->name
)->data
);
2570 if (XINT (p
->infd
) < 0)
2571 error ("Process %s is not active",
2572 XSTRING (p
->name
)->data
);
2574 if (NILP (p
->pty_flag
))
2575 current_group
= Qnil
;
2577 /* If we are using pgrps, get a pgrp number and make it negative. */
2578 if (!NILP (current_group
))
2580 #ifdef SIGNALS_VIA_CHARACTERS
2581 /* If possible, send signals to the entire pgrp
2582 by sending an input character to it. */
2584 /* TERMIOS is the latest and bestest, and seems most likely to
2585 work. If the system has it, use it. */
2592 tcgetattr (XINT (p
->infd
), &t
);
2593 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2597 tcgetattr (XINT (p
->infd
), &t
);
2598 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2602 tcgetattr (XINT (p
->infd
), &t
);
2603 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
2604 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2606 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
2611 #else /* ! HAVE_TERMIOS */
2613 /* On Berkeley descendants, the following IOCTL's retrieve the
2614 current control characters. */
2615 #if defined (TIOCGLTC) && defined (TIOCGETC)
2623 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2624 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
2627 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
2628 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
2632 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
2633 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
2635 #endif /* ! defined (SIGTSTP) */
2638 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2640 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
2647 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2648 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
2651 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2652 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
2656 ioctl (XINT (p
->infd
), TCGETA
, &t
);
2657 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
2659 #endif /* ! defined (SIGTSTP) */
2661 #else /* ! defined (TCGETA) */
2662 Your configuration files are messed up
.
2663 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
2664 you'd better be using one of the alternatives above! */
2665 #endif /* ! defined (TCGETA) */
2666 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
2667 #endif /* ! defined HAVE_TERMIOS */
2668 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
2671 /* Get the pgrp using the tty itself, if we have that.
2672 Otherwise, use the pty to get the pgrp.
2673 On pfa systems, saka@pfu.fujitsu.co.JP writes:
2674 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
2675 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
2676 His patch indicates that if TIOCGPGRP returns an error, then
2677 we should just assume that p->pid is also the process group id. */
2681 if (!NILP (p
->subtty
))
2682 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
2684 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
2688 gid
= - XFASTINT (p
->pid
);
2689 #endif /* ! defined (pfa) */
2695 #else /* ! defined (TIOCGPGRP ) */
2696 /* Can't select pgrps on this system, so we know that
2697 the child itself heads the pgrp. */
2698 gid
= - XFASTINT (p
->pid
);
2699 #endif /* ! defined (TIOCGPGRP ) */
2702 gid
= - XFASTINT (p
->pid
);
2708 p
->raw_status_low
= Qnil
;
2709 p
->raw_status_high
= Qnil
;
2711 XSETINT (p
->tick
, ++process_tick
);
2715 #endif /* ! defined (SIGCONT) */
2718 send_process (proc
, "\003", 1, Qnil
); /* ^C */
2723 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
2728 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
2731 flush_pending_output (XINT (p
->infd
));
2735 /* If we don't have process groups, send the signal to the immediate
2736 subprocess. That isn't really right, but it's better than any
2737 obvious alternative. */
2740 kill (XFASTINT (p
->pid
), signo
);
2744 /* gid may be a pid, or minus a pgrp's number */
2746 if (!NILP (current_group
))
2747 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
2750 gid
= - XFASTINT (p
->pid
);
2753 #else /* ! defined (TIOCSIGSEND) */
2754 EMACS_KILLPG (-gid
, signo
);
2755 #endif /* ! defined (TIOCSIGSEND) */
2758 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
2759 "Interrupt process PROCESS. May be process or name of one.\n\
2760 PROCESS may be a process, a buffer, or the name of a process or buffer.\n\
2761 nil or no arg means current buffer's process.\n\
2762 Second arg CURRENT-GROUP non-nil means send signal to\n\
2763 the current process-group of the process's controlling terminal\n\
2764 rather than to the process's own process group.\n\
2765 If the process is a shell, this means interrupt current subjob\n\
2766 rather than the shell.")
2767 (process
, current_group
)
2768 Lisp_Object process
, current_group
;
2770 process_send_signal (process
, SIGINT
, current_group
, 0);
2774 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
2775 "Kill process PROCESS. May be process or name of one.\n\
2776 See function `interrupt-process' for more details on usage.")
2777 (process
, current_group
)
2778 Lisp_Object process
, current_group
;
2780 process_send_signal (process
, SIGKILL
, current_group
, 0);
2784 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
2785 "Send QUIT signal to process PROCESS. May be process or name of one.\n\
2786 See function `interrupt-process' for more details on usage.")
2787 (process
, current_group
)
2788 Lisp_Object process
, current_group
;
2790 process_send_signal (process
, SIGQUIT
, current_group
, 0);
2794 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
2795 "Stop process PROCESS. May be process or name of one.\n\
2796 See function `interrupt-process' for more details on usage.")
2797 (process
, current_group
)
2798 Lisp_Object process
, current_group
;
2801 error ("no SIGTSTP support");
2803 process_send_signal (process
, SIGTSTP
, current_group
, 0);
2808 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
2809 "Continue process PROCESS. May be process or name of one.\n\
2810 See function `interrupt-process' for more details on usage.")
2811 (process
, current_group
)
2812 Lisp_Object process
, current_group
;
2815 process_send_signal (process
, SIGCONT
, current_group
, 0);
2817 error ("no SIGCONT support");
2822 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
2823 2, 2, "nProcess number: \nnSignal code: ",
2824 "Send the process with number PID the signal with code CODE.\n\
2825 Both PID and CODE are integers.")
2827 Lisp_Object pid
, sig
;
2829 CHECK_NUMBER (pid
, 0);
2830 CHECK_NUMBER (sig
, 1);
2831 return make_number (kill (XINT (pid
), XINT (sig
)));
2834 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
2835 "Make PROCESS see end-of-file in its input.\n\
2836 Eof comes after any text already sent to it.\n\
2837 PROCESS may be a process, a buffer, the name of a process or buffer, or\n\
2838 nil, indicating the current buffer's process.\n\
2839 If PROCESS is a network connection, or is a process communicating\n\
2840 through a pipe (as opposed to a pty), then you cannot send any more\n\
2841 text to PROCESS after you call this function.")
2843 Lisp_Object process
;
2847 proc
= get_process (process
);
2849 /* Make sure the process is really alive. */
2850 if (! NILP (XPROCESS (proc
)->raw_status_low
))
2851 update_status (XPROCESS (proc
));
2852 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
2853 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
2855 /* Sending a zero-length record is supposed to mean eof
2856 when TIOCREMOTE is turned on. */
2860 write (XINT (XPROCESS (proc
)->outfd
), buf
, 0);
2862 #else /* did not do TOICREMOTE */
2864 send_process (proc
, "\032", 1, Qnil
); /* ^z */
2866 if (!NILP (XPROCESS (proc
)->pty_flag
))
2867 send_process (proc
, "\004", 1, Qnil
);
2870 close (XINT (XPROCESS (proc
)->outfd
));
2871 XSET (XPROCESS (proc
)->outfd
, Lisp_Int
, open (NULL_DEVICE
, O_WRONLY
));
2874 #endif /* did not do TOICREMOTE */
2878 /* Kill all processes associated with `buffer'.
2879 If `buffer' is nil, kill all processes */
2881 kill_buffer_processes (buffer
)
2884 Lisp_Object tail
, proc
;
2886 for (tail
= Vprocess_alist
; XGCTYPE (tail
) == Lisp_Cons
;
2887 tail
= XCONS (tail
)->cdr
)
2889 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
2890 if (XGCTYPE (proc
) == Lisp_Process
2891 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
2893 if (NETCONN_P (proc
))
2894 Fdelete_process (proc
);
2895 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
2896 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
2901 /* On receipt of a signal that a child status has changed,
2902 loop asking about children with changed statuses until
2903 the system says there are no more.
2904 All we do is change the status;
2905 we do not run sentinels or print notifications.
2906 That is saved for the next time keyboard input is done,
2907 in order to avoid timing errors. */
2909 /** WARNING: this can be called during garbage collection.
2910 Therefore, it must not be fooled by the presence of mark bits in
2913 /** USG WARNING: Although it is not obvious from the documentation
2914 in signal(2), on a USG system the SIGCLD handler MUST NOT call
2915 signal() before executing at least one wait(), otherwise the handler
2916 will be called again, resulting in an infinite loop. The relevant
2917 portion of the documentation reads "SIGCLD signals will be queued
2918 and the signal-catching function will be continually reentered until
2919 the queue is empty". Invoking signal() causes the kernel to reexamine
2920 the SIGCLD queue. Fred Fish, UniSoft Systems Inc. */
2923 sigchld_handler (signo
)
2926 int old_errno
= errno
;
2928 register struct Lisp_Process
*p
;
2929 extern EMACS_TIME
*input_available_clear_time
;
2933 sigheld
|= sigbit (SIGCHLD
);
2945 #endif /* no WUNTRACED */
2946 /* Keep trying to get a status until we get a definitive result. */
2950 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
2952 while (pid
<= 0 && errno
== EINTR
);
2956 /* A real failure. We have done all our job, so return. */
2958 /* USG systems forget handlers when they are used;
2959 must reestablish each time */
2961 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
2964 sigheld
&= ~sigbit (SIGCHLD
);
2972 #endif /* no WNOHANG */
2974 /* Find the process that signaled us, and record its status. */
2977 for (tail
= Vprocess_alist
; XSYMBOL (tail
) != XSYMBOL (Qnil
); tail
= XCONS (tail
)->cdr
)
2979 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
2980 p
= XPROCESS (proc
);
2981 if (EQ (p
->childp
, Qt
) && XFASTINT (p
->pid
) == pid
)
2986 /* Look for an asynchronous process whose pid hasn't been filled
2989 for (tail
= Vprocess_alist
; XSYMBOL (tail
) != XSYMBOL (Qnil
); tail
= XCONS (tail
)->cdr
)
2991 proc
= XCONS (XCONS (tail
)->car
)->cdr
;
2992 p
= XPROCESS (proc
);
2993 if (XTYPE (p
->pid
) == Lisp_Int
&& XINT (p
->pid
) == -1)
2998 /* Change the status of the process that was found. */
3001 union { int i
; WAITTYPE wt
; } u
;
3003 XSETINT (p
->tick
, ++process_tick
);
3005 XFASTINT (p
->raw_status_low
) = u
.i
& 0xffff;
3006 XFASTINT (p
->raw_status_high
) = u
.i
>> 16;
3008 /* If process has terminated, stop waiting for its output. */
3009 if (WIFSIGNALED (w
) || WIFEXITED (w
))
3010 if (XINT (p
->infd
) >= 0)
3011 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
3013 /* Tell wait_reading_process_input that it needs to wake up and
3015 if (input_available_clear_time
)
3016 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3019 /* There was no asynchronous process found for that id. Check
3020 if we have a synchronous process. */
3023 synch_process_alive
= 0;
3025 /* Report the status of the synchronous process. */
3027 synch_process_retcode
= WRETCODE (w
);
3028 else if (WIFSIGNALED (w
))
3030 int code
= WTERMSIG (w
);
3036 signame
= sys_siglist
[code
];
3038 signame
= sys_errlist
[code
];
3042 signame
= "unknown";
3044 synch_process_death
= signame
;
3047 /* Tell wait_reading_process_input that it needs to wake up and
3049 if (input_available_clear_time
)
3050 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
3053 /* On some systems, we must return right away.
3054 If any more processes want to signal us, we will
3056 Otherwise (on systems that have WNOHANG), loop around
3057 to use up all the processes that have something to tell us. */
3058 #if defined (USG) && ! (defined (HPUX) && defined (WNOHANG))
3060 signal (signo
, sigchld_handler
);
3064 #endif /* USG, but not HPUX with WNOHANG */
3070 exec_sentinel_unwind (data
)
3073 XPROCESS (XCONS (data
)->car
)->sentinel
= XCONS (data
)->cdr
;
3078 exec_sentinel (proc
, reason
)
3079 Lisp_Object proc
, reason
;
3081 Lisp_Object sentinel
, obuffer
, odeactivate
;
3082 register struct Lisp_Process
*p
= XPROCESS (proc
);
3083 int count
= specpdl_ptr
- specpdl
;
3085 odeactivate
= Vdeactivate_mark
;
3086 obuffer
= Fcurrent_buffer ();
3087 sentinel
= p
->sentinel
;
3088 if (NILP (sentinel
))
3091 /* Zilch the sentinel while it's running, to avoid recursive invocations;
3092 assure that it gets restored no matter how the sentinel exits. */
3094 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
3095 /* Inhibit quit so that random quits don't screw up a running filter. */
3096 specbind (Qinhibit_quit
, Qt
);
3097 specbind (Qlast_nonmenu_event
, Qt
);
3098 call2 (sentinel
, proc
, reason
);
3100 Vdeactivate_mark
= odeactivate
;
3101 if (! EQ (Fcurrent_buffer (), obuffer
))
3102 record_asynch_buffer_change ();
3104 if (waiting_for_user_input_p
)
3105 prepare_menu_bars ();
3106 unbind_to (count
, Qnil
);
3109 /* Report all recent events of a change in process status
3110 (either run the sentinel or output a message).
3111 This is done while Emacs is waiting for keyboard input. */
3115 register Lisp_Object proc
, buffer
;
3116 Lisp_Object tail
, msg
;
3117 struct gcpro gcpro1
, gcpro2
;
3121 /* We need to gcpro tail; if read_process_output calls a filter
3122 which deletes a process and removes the cons to which tail points
3123 from Vprocess_alist, and then causes a GC, tail is an unprotected
3127 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
3130 register struct Lisp_Process
*p
;
3132 proc
= Fcdr (Fcar (tail
));
3133 p
= XPROCESS (proc
);
3135 if (XINT (p
->tick
) != XINT (p
->update_tick
))
3137 XSETINT (p
->update_tick
, XINT (p
->tick
));
3139 /* If process is still active, read any output that remains. */
3140 if (XINT (p
->infd
) >= 0)
3141 while (! EQ (p
->filter
, Qt
)
3142 && read_process_output (proc
, XINT (p
->infd
)) > 0);
3146 /* Get the text to use for the message. */
3147 if (!NILP (p
->raw_status_low
))
3149 msg
= status_message (p
->status
);
3151 /* If process is terminated, deactivate it or delete it. */
3153 if (XTYPE (p
->status
) == Lisp_Cons
)
3154 symbol
= XCONS (p
->status
)->car
;
3156 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
3157 || EQ (symbol
, Qclosed
))
3159 if (delete_exited_processes
)
3160 remove_process (proc
);
3162 deactivate_process (proc
);
3165 /* Now output the message suitably. */
3166 if (!NILP (p
->sentinel
))
3167 exec_sentinel (proc
, msg
);
3168 /* Don't bother with a message in the buffer
3169 when a process becomes runnable. */
3170 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
3172 Lisp_Object ro
, tem
;
3173 struct buffer
*old
= current_buffer
;
3176 ro
= XBUFFER (buffer
)->read_only
;
3178 /* Avoid error if buffer is deleted
3179 (probably that's why the process is dead, too) */
3180 if (NILP (XBUFFER (buffer
)->name
))
3182 Fset_buffer (buffer
);
3184 /* Insert new output into buffer
3185 at the current end-of-output marker,
3186 thus preserving logical ordering of input and output. */
3187 if (XMARKER (p
->mark
)->buffer
)
3188 SET_PT (marker_position (p
->mark
));
3191 if (point
<= opoint
)
3192 opoint
+= XSTRING (msg
)->size
+ XSTRING (p
->name
)->size
+ 10;
3194 tem
= current_buffer
->read_only
;
3195 current_buffer
->read_only
= Qnil
;
3196 insert_string ("\nProcess ");
3197 Finsert (1, &p
->name
);
3198 insert_string (" ");
3200 current_buffer
->read_only
= tem
;
3201 Fset_marker (p
->mark
, make_number (point
), p
->buffer
);
3204 set_buffer_internal (old
);
3209 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
3210 redisplay_preserve_echo_area ();
3212 update_tick
= process_tick
;
3223 if (! noninteractive
|| initialized
)
3225 signal (SIGCHLD
, sigchld_handler
);
3228 FD_ZERO (&input_wait_mask
);
3229 max_process_desc
= 0;
3231 keyboard_descriptor
= 0;
3232 FD_SET (keyboard_descriptor
, &input_wait_mask
);
3234 Vprocess_alist
= Qnil
;
3235 for (i
= 0; i
< MAXDESC
; i
++)
3237 chan_process
[i
] = Qnil
;
3238 proc_buffered_char
[i
] = -1;
3242 /* From now on, assume keyboard input comes from descriptor DESC. */
3245 change_keyboard_wait_descriptor (desc
)
3248 FD_CLR (keyboard_descriptor
, &input_wait_mask
);
3249 keyboard_descriptor
= desc
;
3250 FD_SET (keyboard_descriptor
, &input_wait_mask
);
3256 stream_process
= intern ("stream");
3258 Qprocessp
= intern ("processp");
3259 staticpro (&Qprocessp
);
3260 Qrun
= intern ("run");
3262 Qstop
= intern ("stop");
3264 Qsignal
= intern ("signal");
3265 staticpro (&Qsignal
);
3267 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
3270 Qexit = intern ("exit");
3271 staticpro (&Qexit); */
3273 Qopen
= intern ("open");
3275 Qclosed
= intern ("closed");
3276 staticpro (&Qclosed
);
3278 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
3279 staticpro (&Qlast_nonmenu_event
);
3281 staticpro (&Vprocess_alist
);
3283 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
3284 "*Non-nil means delete processes immediately when they exit.\n\
3285 nil means don't delete them until `list-processes' is run.");
3287 delete_exited_processes
= 1;
3289 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
3290 "Control type of device used to communicate with subprocesses.\n\
3291 Values are nil to use a pipe, or t or `pty' to use a pty.\n\
3292 The value has no effect if the system has no ptys or if all ptys are busy:\n\
3293 then a pipe is used in any case.\n\
3294 The value takes effect when `start-process' is called.");
3295 Vprocess_connection_type
= Qt
;
3297 defsubr (&Sprocessp
);
3298 defsubr (&Sget_process
);
3299 defsubr (&Sget_buffer_process
);
3300 defsubr (&Sdelete_process
);
3301 defsubr (&Sprocess_status
);
3302 defsubr (&Sprocess_exit_status
);
3303 defsubr (&Sprocess_id
);
3304 defsubr (&Sprocess_name
);
3305 defsubr (&Sprocess_command
);
3306 defsubr (&Sset_process_buffer
);
3307 defsubr (&Sprocess_buffer
);
3308 defsubr (&Sprocess_mark
);
3309 defsubr (&Sset_process_filter
);
3310 defsubr (&Sprocess_filter
);
3311 defsubr (&Sset_process_sentinel
);
3312 defsubr (&Sset_process_window_size
);
3313 defsubr (&Sprocess_sentinel
);
3314 defsubr (&Sprocess_kill_without_query
);
3315 defsubr (&Slist_processes
);
3316 defsubr (&Sprocess_list
);
3317 defsubr (&Sstart_process
);
3319 defsubr (&Sopen_network_stream
);
3320 #endif /* HAVE_SOCKETS */
3321 defsubr (&Saccept_process_output
);
3322 defsubr (&Sprocess_send_region
);
3323 defsubr (&Sprocess_send_string
);
3324 defsubr (&Sinterrupt_process
);
3325 defsubr (&Skill_process
);
3326 defsubr (&Squit_process
);
3327 defsubr (&Sstop_process
);
3328 defsubr (&Scontinue_process
);
3329 defsubr (&Sprocess_send_eof
);
3330 defsubr (&Ssignal_process
);
3331 defsubr (&Swaiting_for_user_input_p
);
3332 /* defsubr (&Sprocess_connection); */
3336 #else /* not subprocesses */
3338 #include <sys/types.h>
3342 #include "systime.h"
3343 #include "termopts.h"
3345 extern int frame_garbaged
;
3348 /* As described above, except assuming that there are no subprocesses:
3350 Wait for timeout to elapse and/or keyboard input to be available.
3353 timeout in seconds, or
3354 zero for no limit, or
3355 -1 means gobble data immediately available but don't wait for any.
3357 read_kbd is a Lisp_Object:
3358 0 to ignore keyboard input, or
3359 1 to return when input is available, or
3360 -1 means caller will actually read the input, so don't throw to
3362 We know that read_kbd will never be a Lisp_Process, since
3363 `subprocesses' isn't defined.
3365 do_display != 0 means redisplay should be done to show subprocess
3366 output that arrives.
3368 Return true iff we received input from any process. */
3371 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
3372 int time_limit
, microsecs
;
3373 Lisp_Object read_kbd
;
3376 EMACS_TIME end_time
, timeout
, *timeout_p
;
3379 /* What does time_limit really mean? */
3380 if (time_limit
|| microsecs
)
3382 /* It's not infinite. */
3383 timeout_p
= &timeout
;
3385 if (time_limit
== -1)
3386 /* In fact, it's zero. */
3387 EMACS_SET_SECS_USECS (timeout
, 0, 0);
3389 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
3391 /* How far in the future is that? */
3392 EMACS_GET_TIME (end_time
);
3393 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
3396 /* It's infinite. */
3399 /* This must come before stop_polling. */
3400 prepare_menu_bars ();
3402 /* Turn off periodic alarms (in case they are in use)
3403 because the select emulator uses alarms. */
3410 waitchannels
= XINT (read_kbd
) ? 1 : 0;
3412 /* If calling from keyboard input, do not quit
3413 since we want to return C-g as an input character.
3414 Otherwise, do pending quit if requested. */
3415 if (XINT (read_kbd
) >= 0)
3420 EMACS_GET_TIME (*timeout_p
);
3421 EMACS_SUB_TIME (*timeout_p
, end_time
, *timeout_p
);
3422 if (EMACS_TIME_NEG_P (*timeout_p
))
3426 /* Cause C-g and alarm signals to take immediate action,
3427 and cause input available signals to zero out timeout. */
3428 if (XINT (read_kbd
) < 0)
3429 set_waiting_for_input (&timeout
);
3431 /* If a frame has been newly mapped and needs updating,
3432 reprocess its display stuff. */
3433 if (frame_garbaged
&& do_display
)
3434 redisplay_preserve_echo_area ();
3436 if (XINT (read_kbd
) && detect_input_pending ())
3439 nfds
= select (1, &waitchannels
, 0, 0, timeout_p
);
3441 /* Make C-g and alarm signals set flags again */
3442 clear_waiting_for_input ();
3444 /* If we woke up due to SIGWINCH, actually change size now. */
3445 do_pending_window_change ();
3449 /* If the system call was interrupted, then go around the
3455 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
3456 /* System sometimes fails to deliver SIGIO. */
3457 kill (getpid (), SIGIO
);
3460 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
3464 /* If we have timed out (nfds == 0) or found some input (nfds > 0),
3476 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
3477 /* Don't confuse make-docfile by having two doc strings for this function.
3478 make-docfile does not pay attention to #if, for good reason! */
3481 register Lisp_Object name
;
3486 /* Kill all processes associated with `buffer'.
3487 If `buffer' is nil, kill all processes.
3488 Since we have no subprocesses, this does nothing. */
3490 kill_buffer_processes (buffer
)
3501 defsubr (&Sget_buffer_process
);
3505 #endif /* not subprocesses */