1 /* Asynchronous subprocess control for GNU Emacs.
2 Copyright (C) 1985, 86, 87, 88, 93, 94, 95, 96, 98, 1999,
3 2001, 2002 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. */
23 #define _GNU_SOURCE /* to get strsignal declared with glibc 2 */
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 */
47 #if defined(WINDOWSNT) || defined(UNIX98_PTYS)
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 */
61 /* Are local (unix) sockets supported? */
62 #if defined (HAVE_SYS_UN_H) && !defined (NO_SOCKETS_IN_FILE_SYSTEM)
63 #if !defined (AF_LOCAL) && defined (AF_UNIX)
64 #define AF_LOCAL AF_UNIX
67 #define HAVE_LOCAL_SOCKETS
71 #endif /* HAVE_SOCKETS */
73 /* TERM is a poor-man's SLIP, used on GNU/Linux. */
78 /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */
79 #ifdef HAVE_BROKEN_INET_ADDR
80 #define IN_ADDR struct in_addr
81 #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1)
83 #define IN_ADDR unsigned long
84 #define NUMERIC_ADDR_ERROR (numeric_addr == -1)
87 #if defined(BSD_SYSTEM) || defined(STRIDE)
88 #include <sys/ioctl.h>
89 #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5)
91 #endif /* HAVE_PTYS and no O_NDELAY */
92 #endif /* BSD_SYSTEM || STRIDE */
94 #ifdef BROKEN_O_NONBLOCK
96 #endif /* BROKEN_O_NONBLOCK */
103 #include <sys/sysmacros.h> /* for "minor" */
104 #endif /* not IRIS */
115 #include "termhooks.h"
116 #include "termopts.h"
117 #include "commands.h"
118 #include "keyboard.h"
120 #include "blockinput.h"
121 #include "dispextern.h"
122 #include "composite.h"
125 Lisp_Object Qprocessp
;
126 Lisp_Object Qrun
, Qstop
, Qsignal
;
127 Lisp_Object Qopen
, Qclosed
, Qconnect
, Qfailed
, Qlisten
;
128 Lisp_Object Qlocal
, Qdatagram
;
129 Lisp_Object QCname
, QCbuffer
, QChost
, QCservice
, QCtype
;
130 Lisp_Object QClocal
, QCremote
, QCcoding
;
131 Lisp_Object QCserver
, QCnowait
, QCnoquery
, QCstop
;
132 Lisp_Object QCsentinel
, QClog
, QCoptions
;
133 Lisp_Object Qlast_nonmenu_event
;
134 /* QCfamily is declared and initialized in xfaces.c,
135 QCfilter in keyboard.c. */
136 extern Lisp_Object QCfamily
, QCfilter
;
138 /* Qexit is declared and initialized in eval.c. */
140 /* QCfamily is defined in xfaces.c. */
141 extern Lisp_Object QCfamily
;
142 /* QCfilter is defined in keyboard.c. */
143 extern Lisp_Object QCfilter
;
145 /* a process object is a network connection when its childp field is neither
146 Qt nor Qnil but is instead a cons cell (HOSTNAME PORTNUM). */
149 #define NETCONN_P(p) (GC_CONSP (XPROCESS (p)->childp))
150 #define NETCONN1_P(p) (GC_CONSP ((p)->childp))
152 #define NETCONN_P(p) 0
153 #define NETCONN1_P(p) 0
154 #endif /* HAVE_SOCKETS */
156 /* Define first descriptor number available for subprocesses. */
158 #define FIRST_PROC_DESC 1
160 #define FIRST_PROC_DESC 3
163 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
166 #if !defined (SIGCHLD) && defined (SIGCLD)
167 #define SIGCHLD SIGCLD
170 #include "syssignal.h"
174 extern void set_waiting_for_input
P_ ((EMACS_TIME
*));
180 extern char *sys_errlist
[];
187 /* t means use pty, nil means use a pipe,
188 maybe other values to come. */
189 static Lisp_Object Vprocess_connection_type
;
193 #include <sys/socket.h>
197 /* These next two vars are non-static since sysdep.c uses them in the
198 emulation of `select'. */
199 /* Number of events of change of status of a process. */
201 /* Number of events for which the user or sentinel has been notified. */
204 /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */
206 #ifdef BROKEN_NON_BLOCKING_CONNECT
207 #undef NON_BLOCKING_CONNECT
209 #ifndef NON_BLOCKING_CONNECT
212 #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX)
213 #if defined (O_NONBLOCK) || defined (O_NDELAY)
214 #if defined (EWOULDBLOCK) || defined (EINPROGRESS)
215 #define NON_BLOCKING_CONNECT
216 #endif /* EWOULDBLOCK || EINPROGRESS */
217 #endif /* O_NONBLOCK || O_NDELAY */
218 #endif /* HAVE_GETPEERNAME || GNU_LINUX */
219 #endif /* HAVE_SELECT */
220 #endif /* HAVE_SOCKETS */
221 #endif /* NON_BLOCKING_CONNECT */
222 #endif /* BROKEN_NON_BLOCKING_CONNECT */
224 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
225 this system. We need to read full packets, so we need a
226 "non-destructive" select. So we require either native select,
227 or emulation of select using FIONREAD. */
229 #ifdef BROKEN_DATAGRAM_SOCKETS
230 #undef DATAGRAM_SOCKETS
232 #ifndef DATAGRAM_SOCKETS
234 #if defined (HAVE_SELECT) || defined (FIONREAD)
235 #if defined (HAVE_SENDTO) && defined (HAVE_RECVFROM) && defined (EMSGSIZE)
236 #define DATAGRAM_SOCKETS
237 #endif /* HAVE_SENDTO && HAVE_RECVFROM && EMSGSIZE */
238 #endif /* HAVE_SELECT || FIONREAD */
239 #endif /* HAVE_SOCKETS */
240 #endif /* DATAGRAM_SOCKETS */
241 #endif /* BROKEN_DATAGRAM_SOCKETS */
244 #undef NON_BLOCKING_CONNECT
245 #undef DATAGRAM_SOCKETS
249 #include "sysselect.h"
251 extern int keyboard_bit_set
P_ ((SELECT_TYPE
*));
253 /* If we support a window system, turn on the code to poll periodically
254 to detect C-g. It isn't actually used when doing interrupt input. */
255 #ifdef HAVE_WINDOW_SYSTEM
256 #define POLL_FOR_INPUT
259 /* Mask of bits indicating the descriptors that we wait for input on. */
261 static SELECT_TYPE input_wait_mask
;
263 /* Mask that excludes keyboard input descriptor (s). */
265 static SELECT_TYPE non_keyboard_wait_mask
;
267 /* Mask that excludes process input descriptor (s). */
269 static SELECT_TYPE non_process_wait_mask
;
271 /* Mask of bits indicating the descriptors that we wait for connect to
272 complete on. Once they complete, they are removed from this mask
273 and added to the input_wait_mask and non_keyboard_wait_mask. */
275 static SELECT_TYPE connect_wait_mask
;
277 /* Number of bits set in connect_wait_mask. */
278 static int num_pending_connects
;
280 /* The largest descriptor currently in use for a process object. */
281 static int max_process_desc
;
283 /* The largest descriptor currently in use for keyboard input. */
284 static int max_keyboard_desc
;
286 /* Nonzero means delete a process right away if it exits. */
287 static int delete_exited_processes
;
289 /* Indexed by descriptor, gives the process (if any) for that descriptor */
290 Lisp_Object chan_process
[MAXDESC
];
292 /* Alist of elements (NAME . PROCESS) */
293 Lisp_Object Vprocess_alist
;
295 /* Buffered-ahead input char from process, indexed by channel.
296 -1 means empty (no char is buffered).
297 Used on sys V where the only way to tell if there is any
298 output from the process is to read at least one char.
299 Always -1 on systems that support FIONREAD. */
301 /* Don't make static; need to access externally. */
302 int proc_buffered_char
[MAXDESC
];
304 /* Table of `struct coding-system' for each process. */
305 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
306 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
308 #ifdef DATAGRAM_SOCKETS
309 /* Table of `partner address' for datagram sockets. */
310 struct sockaddr_and_len
{
313 } datagram_address
[MAXDESC
];
314 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
315 #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XINT (XPROCESS (proc)->infd)].sa != 0)
317 #define DATAGRAM_CHAN_P(chan) (0)
318 #define DATAGRAM_CONN_P(proc) (0)
321 static Lisp_Object
get_process ();
322 static void exec_sentinel ();
324 extern EMACS_TIME
timer_check ();
325 extern int timers_run
;
327 /* Maximum number of bytes to send to a pty without an eof. */
328 static int pty_max_bytes
;
330 extern Lisp_Object Vfile_name_coding_system
, Vdefault_file_name_coding_system
;
333 /* The file name of the pty opened by allocate_pty. */
335 static char pty_name
[24];
338 /* Compute the Lisp form of the process status, p->status, from
339 the numeric status that was returned by `wait'. */
341 Lisp_Object
status_convert ();
345 struct Lisp_Process
*p
;
347 union { int i
; WAITTYPE wt
; } u
;
348 u
.i
= XFASTINT (p
->raw_status_low
) + (XFASTINT (p
->raw_status_high
) << 16);
349 p
->status
= status_convert (u
.wt
);
350 p
->raw_status_low
= Qnil
;
351 p
->raw_status_high
= Qnil
;
354 /* Convert a process status word in Unix format to
355 the list that we use internally. */
362 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
363 else if (WIFEXITED (w
))
364 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
365 WCOREDUMP (w
) ? Qt
: Qnil
));
366 else if (WIFSIGNALED (w
))
367 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
368 WCOREDUMP (w
) ? Qt
: Qnil
));
373 /* Given a status-list, extract the three pieces of information
374 and store them individually through the three pointers. */
377 decode_status (l
, symbol
, code
, coredump
)
395 *code
= XFASTINT (XCAR (tem
));
397 *coredump
= !NILP (tem
);
401 /* Return a string describing a process status list. */
404 status_message (status
)
409 Lisp_Object string
, string2
;
411 decode_status (status
, &symbol
, &code
, &coredump
);
413 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
416 synchronize_system_messages_locale ();
417 signame
= strsignal (code
);
420 string
= build_string (signame
);
421 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
422 SSET (string
, 0, DOWNCASE (SREF (string
, 0)));
423 return concat2 (string
, string2
);
425 else if (EQ (symbol
, Qexit
))
428 return build_string ("finished\n");
429 string
= Fnumber_to_string (make_number (code
));
430 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
431 return concat3 (build_string ("exited abnormally with code "),
434 else if (EQ (symbol
, Qfailed
))
436 string
= Fnumber_to_string (make_number (code
));
437 string2
= build_string ("\n");
438 return concat3 (build_string ("failed with code "),
442 return Fcopy_sequence (Fsymbol_name (symbol
));
447 /* Open an available pty, returning a file descriptor.
448 Return -1 on failure.
449 The file name of the terminal corresponding to the pty
450 is left in the variable pty_name. */
459 /* Some systems name their pseudoterminals so that there are gaps in
460 the usual sequence - for example, on HP9000/S700 systems, there
461 are no pseudoterminals with names ending in 'f'. So we wait for
462 three failures in a row before deciding that we've reached the
464 int failed_count
= 0;
469 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
470 for (i
= 0; i
< 16; i
++)
473 #ifdef PTY_NAME_SPRINTF
476 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
477 #endif /* no PTY_NAME_SPRINTF */
481 #else /* no PTY_OPEN */
483 /* Unusual IRIS code */
484 *ptyv
= emacs_open ("/dev/ptc", O_RDWR
| O_NDELAY
, 0);
487 if (fstat (fd
, &stb
) < 0)
490 if (stat (pty_name
, &stb
) < 0)
493 if (failed_count
>= 3)
499 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
501 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
503 #endif /* not IRIS */
504 #endif /* no PTY_OPEN */
508 /* check to make certain that both sides are available
509 this avoids a nasty yet stupid bug in rlogins */
510 #ifdef PTY_TTY_NAME_SPRINTF
513 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
514 #endif /* no PTY_TTY_NAME_SPRINTF */
516 if (access (pty_name
, 6) != 0)
519 #if !defined(IRIS) && !defined(__sgi)
525 #endif /* not UNIPLUS */
532 #endif /* HAVE_PTYS */
538 register Lisp_Object val
, tem
, name1
;
539 register struct Lisp_Process
*p
;
543 p
= allocate_process ();
545 XSETINT (p
->infd
, -1);
546 XSETINT (p
->outfd
, -1);
547 XSETFASTINT (p
->pid
, 0);
548 XSETFASTINT (p
->tick
, 0);
549 XSETFASTINT (p
->update_tick
, 0);
550 p
->raw_status_low
= Qnil
;
551 p
->raw_status_high
= Qnil
;
553 p
->mark
= Fmake_marker ();
555 /* If name is already in use, modify it until it is unused. */
560 tem
= Fget_process (name1
);
561 if (NILP (tem
)) break;
562 sprintf (suffix
, "<%d>", i
);
563 name1
= concat2 (name
, build_string (suffix
));
567 XSETPROCESS (val
, p
);
568 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
573 remove_process (proc
)
574 register Lisp_Object proc
;
576 register Lisp_Object pair
;
578 pair
= Frassq (proc
, Vprocess_alist
);
579 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
581 deactivate_process (proc
);
584 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
585 doc
: /* Return t if OBJECT is a process. */)
589 return PROCESSP (object
) ? Qt
: Qnil
;
592 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
593 doc
: /* Return the process named NAME, or nil if there is none. */)
595 register Lisp_Object name
;
600 return Fcdr (Fassoc (name
, Vprocess_alist
));
603 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
604 doc
: /* Return the (or a) process associated with BUFFER.
605 BUFFER may be a buffer or the name of one. */)
607 register Lisp_Object buffer
;
609 register Lisp_Object buf
, tail
, proc
;
611 if (NILP (buffer
)) return Qnil
;
612 buf
= Fget_buffer (buffer
);
613 if (NILP (buf
)) return Qnil
;
615 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
617 proc
= Fcdr (Fcar (tail
));
618 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
624 /* This is how commands for the user decode process arguments. It
625 accepts a process, a process name, a buffer, a buffer name, or nil.
626 Buffers denote the first process in the buffer, and nil denotes the
631 register Lisp_Object name
;
633 register Lisp_Object proc
, obj
;
636 obj
= Fget_process (name
);
638 obj
= Fget_buffer (name
);
640 error ("Process %s does not exist", SDATA (name
));
642 else if (NILP (name
))
643 obj
= Fcurrent_buffer ();
647 /* Now obj should be either a buffer object or a process object.
651 proc
= Fget_buffer_process (obj
);
653 error ("Buffer %s has no process", SDATA (XBUFFER (obj
)->name
));
663 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
664 doc
: /* Delete PROCESS: kill it and forget about it immediately.
665 PROCESS may be a process, a buffer, the name of a process or buffer, or
666 nil, indicating the current buffer's process. */)
668 register Lisp_Object process
;
670 process
= get_process (process
);
671 XPROCESS (process
)->raw_status_low
= Qnil
;
672 XPROCESS (process
)->raw_status_high
= Qnil
;
673 if (NETCONN_P (process
))
675 XPROCESS (process
)->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
676 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
678 else if (XINT (XPROCESS (process
)->infd
) >= 0)
680 Fkill_process (process
, Qnil
);
681 /* Do this now, since remove_process will make sigchld_handler do nothing. */
682 XPROCESS (process
)->status
683 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
684 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
687 remove_process (process
);
691 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
692 doc
: /* Return the status of PROCESS.
693 The returned value is one of the following symbols:
694 run -- for a process that is running.
695 stop -- for a process stopped but continuable.
696 exit -- for a process that has exited.
697 signal -- for a process that has got a fatal signal.
698 open -- for a network stream connection that is open.
699 listen -- for a network stream server that is listening.
700 closed -- for a network stream connection that is closed.
701 connect -- when waiting for a non-blocking connection to complete.
702 failed -- when a non-blocking connection has failed.
703 nil -- if arg is a process name and no such process exists.
704 PROCESS may be a process, a buffer, the name of a process, or
705 nil, indicating the current buffer's process. */)
707 register Lisp_Object process
;
709 register struct Lisp_Process
*p
;
710 register Lisp_Object status
;
712 if (STRINGP (process
))
713 process
= Fget_process (process
);
715 process
= get_process (process
);
720 p
= XPROCESS (process
);
721 if (!NILP (p
->raw_status_low
))
725 status
= XCAR (status
);
728 if (EQ (status
, Qexit
))
730 else if (EQ (p
->command
, Qt
))
732 else if (EQ (status
, Qrun
))
738 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
740 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
741 If PROCESS has not yet exited or died, return 0. */)
743 register Lisp_Object process
;
745 CHECK_PROCESS (process
);
746 if (!NILP (XPROCESS (process
)->raw_status_low
))
747 update_status (XPROCESS (process
));
748 if (CONSP (XPROCESS (process
)->status
))
749 return XCAR (XCDR (XPROCESS (process
)->status
));
750 return make_number (0);
753 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
754 doc
: /* Return the process id of PROCESS.
755 This is the pid of the Unix process which PROCESS uses or talks to.
756 For a network connection, this value is nil. */)
758 register Lisp_Object process
;
760 CHECK_PROCESS (process
);
761 return XPROCESS (process
)->pid
;
764 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
765 doc
: /* Return the name of PROCESS, as a string.
766 This is the name of the program invoked in PROCESS,
767 possibly modified to make it unique among process names. */)
769 register Lisp_Object process
;
771 CHECK_PROCESS (process
);
772 return XPROCESS (process
)->name
;
775 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
776 doc
: /* Return the command that was executed to start PROCESS.
777 This is a list of strings, the first string being the program executed
778 and the rest of the strings being the arguments given to it.
779 For a non-child channel, this is nil. */)
781 register Lisp_Object process
;
783 CHECK_PROCESS (process
);
784 return XPROCESS (process
)->command
;
787 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
788 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
789 This is the terminal that the process itself reads and writes on,
790 not the name of the pty that Emacs uses to talk with that terminal. */)
792 register Lisp_Object process
;
794 CHECK_PROCESS (process
);
795 return XPROCESS (process
)->tty_name
;
798 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
800 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil). */)
802 register Lisp_Object process
, buffer
;
804 struct Lisp_Process
*p
;
806 CHECK_PROCESS (process
);
808 CHECK_BUFFER (buffer
);
809 p
= XPROCESS (process
);
812 p
->childp
= Fplist_put (p
->childp
, QCbuffer
, buffer
);
816 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
818 doc
: /* Return the buffer PROCESS is associated with.
819 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
821 register Lisp_Object process
;
823 CHECK_PROCESS (process
);
824 return XPROCESS (process
)->buffer
;
827 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
829 doc
: /* Return the marker for the end of the last output from PROCESS. */)
831 register Lisp_Object process
;
833 CHECK_PROCESS (process
);
834 return XPROCESS (process
)->mark
;
837 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
839 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
840 t means stop accepting output from the process.
841 When a process has a filter, each time it does output
842 the entire string of output is passed to the filter.
843 The filter gets two arguments: the process and the string of output.
844 If the process has a filter, its buffer is not used for output. */)
846 register Lisp_Object process
, filter
;
848 struct Lisp_Process
*p
;
850 CHECK_PROCESS (process
);
851 p
= XPROCESS (process
);
853 /* Don't signal an error if the process' input file descriptor
854 is closed. This could make debugging Lisp more difficult,
855 for example when doing something like
857 (setq process (start-process ...))
859 (set-process-filter process ...) */
861 if (XINT (p
->infd
) >= 0)
863 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
865 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
866 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
868 else if (EQ (p
->filter
, Qt
)
869 && !EQ (p
->command
, Qt
)) /* Network process not stopped. */
871 FD_SET (XINT (p
->infd
), &input_wait_mask
);
872 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
878 p
->childp
= Fplist_put (p
->childp
, QCfilter
, filter
);
882 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
884 doc
: /* Returns the filter function of PROCESS; nil if none.
885 See `set-process-filter' for more info on filter functions. */)
887 register Lisp_Object process
;
889 CHECK_PROCESS (process
);
890 return XPROCESS (process
)->filter
;
893 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
895 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
896 The sentinel is called as a function when the process changes state.
897 It gets two arguments: the process, and a string describing the change. */)
899 register Lisp_Object process
, sentinel
;
901 CHECK_PROCESS (process
);
902 XPROCESS (process
)->sentinel
= sentinel
;
906 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
908 doc
: /* Return the sentinel of PROCESS; nil if none.
909 See `set-process-sentinel' for more info on sentinels. */)
911 register Lisp_Object process
;
913 CHECK_PROCESS (process
);
914 return XPROCESS (process
)->sentinel
;
917 DEFUN ("set-process-window-size", Fset_process_window_size
,
918 Sset_process_window_size
, 3, 3, 0,
919 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
920 (process
, height
, width
)
921 register Lisp_Object process
, height
, width
;
923 CHECK_PROCESS (process
);
924 CHECK_NATNUM (height
);
925 CHECK_NATNUM (width
);
927 if (XINT (XPROCESS (process
)->infd
) < 0
928 || set_window_size (XINT (XPROCESS (process
)->infd
),
929 XINT (height
), XINT (width
)) <= 0)
935 DEFUN ("set-process-inherit-coding-system-flag",
936 Fset_process_inherit_coding_system_flag
,
937 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
938 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
939 If the second argument FLAG is non-nil, then the variable
940 `buffer-file-coding-system' of the buffer associated with PROCESS
941 will be bound to the value of the coding system used to decode
944 This is useful when the coding system specified for the process buffer
945 leaves either the character code conversion or the end-of-line conversion
946 unspecified, or if the coding system used to decode the process output
947 is more appropriate for saving the process buffer.
949 Binding the variable `inherit-process-coding-system' to non-nil before
950 starting the process is an alternative way of setting the inherit flag
951 for the process which will run. */)
953 register Lisp_Object process
, flag
;
955 CHECK_PROCESS (process
);
956 XPROCESS (process
)->inherit_coding_system_flag
= flag
;
960 DEFUN ("process-inherit-coding-system-flag",
961 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
963 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
964 If this flag is t, `buffer-file-coding-system' of the buffer
965 associated with PROCESS will inherit the coding system used to decode
966 the process output. */)
968 register Lisp_Object process
;
970 CHECK_PROCESS (process
);
971 return XPROCESS (process
)->inherit_coding_system_flag
;
974 DEFUN ("set-process-query-on-exit-flag",
975 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
977 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
978 If the second argument FLAG is non-nil, emacs will query the user before
979 exiting if PROCESS is running. */)
981 register Lisp_Object process
, flag
;
983 CHECK_PROCESS (process
);
984 XPROCESS (process
)->kill_without_query
= Fnull (flag
);
988 DEFUN ("process-query-on-exit-flag",
989 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
991 doc
: /* Return the current value of query on exit flag for PROCESS. */)
993 register Lisp_Object process
;
995 CHECK_PROCESS (process
);
996 return Fnull (XPROCESS (process
)->kill_without_query
);
999 #ifdef DATAGRAM_SOCKETS
1000 Lisp_Object
Fprocess_datagram_address ();
1003 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1005 doc
: /* Return the contact info of PROCESS; t for a real child.
1006 For a net connection, the value depends on the optional KEY arg.
1007 If KEY is nil, value is a cons cell of the form (HOST SERVICE),
1008 if KEY is t, the complete contact information for the connection is
1009 returned, else the specific value for the keyword KEY is returned.
1010 See `make-network-process' for a list of keywords. */)
1012 register Lisp_Object process
, key
;
1014 Lisp_Object contact
;
1016 CHECK_PROCESS (process
);
1017 contact
= XPROCESS (process
)->childp
;
1019 #ifdef DATAGRAM_SOCKETS
1020 if (DATAGRAM_CONN_P (process
)
1021 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1022 contact
= Fplist_put (contact
, QCremote
,
1023 Fprocess_datagram_address (process
));
1026 if (!NETCONN_P (process
) || EQ (key
, Qt
))
1029 return Fcons (Fplist_get (contact
, QChost
),
1030 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1031 return Fplist_get (contact
, key
);
1034 #if 0 /* Turned off because we don't currently record this info
1035 in the process. Perhaps add it. */
1036 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1037 doc
: /* Return the connection type of PROCESS.
1038 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1039 a socket connection. */)
1041 Lisp_Object process
;
1043 return XPROCESS (process
)->type
;
1048 list_processes_1 (query_only
)
1049 Lisp_Object query_only
;
1051 register Lisp_Object tail
, tem
;
1052 Lisp_Object proc
, minspace
, tem1
;
1053 register struct Lisp_Process
*p
;
1055 int w_proc
, w_buffer
, w_tty
;
1056 Lisp_Object i_status
, i_buffer
, i_tty
, i_command
;
1058 w_proc
= 4; /* Proc */
1059 w_buffer
= 6; /* Buffer */
1060 w_tty
= 0; /* Omit if no ttys */
1062 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
1066 proc
= Fcdr (Fcar (tail
));
1067 p
= XPROCESS (proc
);
1068 if (NILP (p
->childp
))
1070 if (!NILP (query_only
) && !NILP (p
->kill_without_query
))
1072 if (STRINGP (p
->name
)
1073 && ( i
= SCHARS (p
->name
), (i
> w_proc
)))
1075 if (!NILP (p
->buffer
))
1077 if (NILP (XBUFFER (p
->buffer
)->name
) && w_buffer
< 8)
1078 w_buffer
= 8; /* (Killed) */
1079 else if ((i
= SCHARS (XBUFFER (p
->buffer
)->name
), (i
> w_buffer
)))
1082 if (STRINGP (p
->tty_name
)
1083 && (i
= SCHARS (p
->tty_name
), (i
> w_tty
)))
1087 XSETFASTINT (i_status
, w_proc
+ 1);
1088 XSETFASTINT (i_buffer
, XFASTINT (i_status
) + 9);
1091 XSETFASTINT (i_tty
, XFASTINT (i_buffer
) + w_buffer
+ 1);
1092 XSETFASTINT (i_command
, XFASTINT (i_buffer
) + w_tty
+ 1);
1095 XSETFASTINT (i_command
, XFASTINT (i_buffer
) + w_buffer
+ 1);
1098 XSETFASTINT (minspace
, 1);
1100 set_buffer_internal (XBUFFER (Vstandard_output
));
1101 Fbuffer_disable_undo (Vstandard_output
);
1103 current_buffer
->truncate_lines
= Qt
;
1105 write_string ("Proc", -1);
1106 Findent_to (i_status
, minspace
); write_string ("Status", -1);
1107 Findent_to (i_buffer
, minspace
); write_string ("Buffer", -1);
1110 Findent_to (i_tty
, minspace
); write_string ("Tty", -1);
1112 Findent_to (i_command
, minspace
); write_string ("Command", -1);
1113 write_string ("\n", -1);
1115 write_string ("----", -1);
1116 Findent_to (i_status
, minspace
); write_string ("------", -1);
1117 Findent_to (i_buffer
, minspace
); write_string ("------", -1);
1120 Findent_to (i_tty
, minspace
); write_string ("---", -1);
1122 Findent_to (i_command
, minspace
); write_string ("-------", -1);
1123 write_string ("\n", -1);
1125 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
1129 proc
= Fcdr (Fcar (tail
));
1130 p
= XPROCESS (proc
);
1131 if (NILP (p
->childp
))
1133 if (!NILP (query_only
) && !NILP (p
->kill_without_query
))
1136 Finsert (1, &p
->name
);
1137 Findent_to (i_status
, minspace
);
1139 if (!NILP (p
->raw_status_low
))
1142 if (CONSP (p
->status
))
1143 symbol
= XCAR (p
->status
);
1146 if (EQ (symbol
, Qsignal
))
1149 tem
= Fcar (Fcdr (p
->status
));
1151 if (XINT (tem
) < NSIG
)
1152 write_string (sys_errlist
[XINT (tem
)], -1);
1155 Fprinc (symbol
, Qnil
);
1157 else if (NETCONN1_P (p
))
1159 if (EQ (symbol
, Qexit
))
1160 write_string ("closed", -1);
1161 else if (EQ (p
->command
, Qt
))
1162 write_string ("stopped", -1);
1163 else if (EQ (symbol
, Qrun
))
1164 write_string ("open", -1);
1166 Fprinc (symbol
, Qnil
);
1169 Fprinc (symbol
, Qnil
);
1171 if (EQ (symbol
, Qexit
))
1174 tem
= Fcar (Fcdr (p
->status
));
1177 sprintf (tembuf
, " %d", (int) XFASTINT (tem
));
1178 write_string (tembuf
, -1);
1182 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
1183 remove_process (proc
);
1185 Findent_to (i_buffer
, minspace
);
1186 if (NILP (p
->buffer
))
1187 insert_string ("(none)");
1188 else if (NILP (XBUFFER (p
->buffer
)->name
))
1189 insert_string ("(Killed)");
1191 Finsert (1, &XBUFFER (p
->buffer
)->name
);
1195 Findent_to (i_tty
, minspace
);
1196 if (STRINGP (p
->tty_name
))
1197 Finsert (1, &p
->tty_name
);
1200 Findent_to (i_command
, minspace
);
1202 if (EQ (p
->status
, Qlisten
))
1204 Lisp_Object port
= Fplist_get (p
->childp
, QCservice
);
1205 if (INTEGERP (port
))
1206 port
= Fnumber_to_string (port
);
1207 sprintf (tembuf
, "(network %s server on %s)\n",
1208 (DATAGRAM_CHAN_P (XINT (p
->infd
)) ? "datagram" : "stream"),
1210 insert_string (tembuf
);
1212 else if (NETCONN1_P (p
))
1214 /* For a local socket, there is no host name,
1215 so display service instead. */
1216 Lisp_Object host
= Fplist_get (p
->childp
, QChost
);
1217 if (!STRINGP (host
))
1219 host
= Fplist_get (p
->childp
, QCservice
);
1220 if (INTEGERP (host
))
1221 host
= Fnumber_to_string (host
);
1223 sprintf (tembuf
, "(network %s connection to %s)\n",
1224 (DATAGRAM_CHAN_P (XINT (p
->infd
)) ? "datagram" : "stream"),
1226 insert_string (tembuf
);
1238 insert_string (" ");
1240 insert_string ("\n");
1246 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 1, "P",
1247 doc
: /* Display a list of all processes.
1248 If optional argument QUERY-ONLY is non-nil, only processes with
1249 the query-on-exit flag set will be listed.
1250 Any process listed as exited or signaled is actually eliminated
1251 after the listing is made. */)
1253 Lisp_Object query_only
;
1255 internal_with_output_to_temp_buffer ("*Process List*",
1256 list_processes_1
, query_only
);
1260 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1261 doc
: /* Return a list of all processes. */)
1264 return Fmapcar (Qcdr
, Vprocess_alist
);
1267 /* Starting asynchronous inferior processes. */
1269 static Lisp_Object
start_process_unwind ();
1271 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1272 doc
: /* Start a program in a subprocess. Return the process object for it.
1273 NAME is name for process. It is modified if necessary to make it unique.
1274 BUFFER is the buffer or (buffer-name) to associate with the process.
1275 Process output goes at end of that buffer, unless you specify
1276 an output stream or filter function to handle the output.
1277 BUFFER may be also nil, meaning that this process is not associated
1279 Third arg is program file name. It is searched for in PATH.
1280 Remaining arguments are strings to give program as arguments.
1282 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1285 register Lisp_Object
*args
;
1287 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1289 register unsigned char *new_argv
;
1292 register unsigned char **new_argv
;
1295 int count
= SPECPDL_INDEX ();
1299 buffer
= Fget_buffer_create (buffer
);
1301 /* Make sure that the child will be able to chdir to the current
1302 buffer's current directory, or its unhandled equivalent. We
1303 can't just have the child check for an error when it does the
1304 chdir, since it's in a vfork.
1306 We have to GCPRO around this because Fexpand_file_name and
1307 Funhandled_file_name_directory might call a file name handling
1308 function. The argument list is protected by the caller, so all
1309 we really have to worry about is buffer. */
1311 struct gcpro gcpro1
, gcpro2
;
1313 current_dir
= current_buffer
->directory
;
1315 GCPRO2 (buffer
, current_dir
);
1318 = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir
),
1320 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1321 report_file_error ("Setting current directory",
1322 Fcons (current_buffer
->directory
, Qnil
));
1328 CHECK_STRING (name
);
1332 CHECK_STRING (program
);
1334 proc
= make_process (name
);
1335 /* If an error occurs and we can't start the process, we want to
1336 remove it from the process list. This means that each error
1337 check in create_process doesn't need to call remove_process
1338 itself; it's all taken care of here. */
1339 record_unwind_protect (start_process_unwind
, proc
);
1341 XPROCESS (proc
)->childp
= Qt
;
1342 XPROCESS (proc
)->command_channel_p
= Qnil
;
1343 XPROCESS (proc
)->buffer
= buffer
;
1344 XPROCESS (proc
)->sentinel
= Qnil
;
1345 XPROCESS (proc
)->filter
= Qnil
;
1346 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1348 /* Make the process marker point into the process buffer (if any). */
1350 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1351 BUF_ZV (XBUFFER (buffer
)),
1352 BUF_ZV_BYTE (XBUFFER (buffer
)));
1355 /* Decide coding systems for communicating with the process. Here
1356 we don't setup the structure coding_system nor pay attention to
1357 unibyte mode. They are done in create_process. */
1359 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1360 Lisp_Object coding_systems
= Qt
;
1361 Lisp_Object val
, *args2
;
1362 struct gcpro gcpro1
, gcpro2
;
1364 val
= Vcoding_system_for_read
;
1367 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1368 args2
[0] = Qstart_process
;
1369 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1370 GCPRO2 (proc
, current_dir
);
1371 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1373 if (CONSP (coding_systems
))
1374 val
= XCAR (coding_systems
);
1375 else if (CONSP (Vdefault_process_coding_system
))
1376 val
= XCAR (Vdefault_process_coding_system
);
1378 XPROCESS (proc
)->decode_coding_system
= val
;
1380 val
= Vcoding_system_for_write
;
1383 if (EQ (coding_systems
, Qt
))
1385 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof args2
);
1386 args2
[0] = Qstart_process
;
1387 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1388 GCPRO2 (proc
, current_dir
);
1389 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1392 if (CONSP (coding_systems
))
1393 val
= XCDR (coding_systems
);
1394 else if (CONSP (Vdefault_process_coding_system
))
1395 val
= XCDR (Vdefault_process_coding_system
);
1397 XPROCESS (proc
)->encode_coding_system
= val
;
1401 /* Make a one member argv with all args concatenated
1402 together separated by a blank. */
1403 len
= SBYTES (program
) + 2;
1404 for (i
= 3; i
< nargs
; i
++)
1408 len
+= SBYTES (tem
) + 1; /* count the blank */
1410 new_argv
= (unsigned char *) alloca (len
);
1411 strcpy (new_argv
, SDATA (program
));
1412 for (i
= 3; i
< nargs
; i
++)
1416 strcat (new_argv
, " ");
1417 strcat (new_argv
, SDATA (tem
));
1419 /* Need to add code here to check for program existence on VMS */
1422 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1424 /* If program file name is not absolute, search our path for it.
1425 Put the name we will really use in TEM. */
1426 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1427 && !(SCHARS (program
) > 1
1428 && IS_DEVICE_SEP (SREF (program
, 1))))
1430 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1433 GCPRO4 (name
, program
, buffer
, current_dir
);
1434 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1437 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1438 tem
= Fexpand_file_name (tem
, Qnil
);
1442 if (!NILP (Ffile_directory_p (program
)))
1443 error ("Specified program for new process is a directory");
1447 /* If program file name starts with /: for quoting a magic name,
1449 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1450 && SREF (tem
, 1) == ':')
1451 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1453 /* Encode the file name and put it in NEW_ARGV.
1454 That's where the child will use it to execute the program. */
1455 tem
= ENCODE_FILE (tem
);
1456 new_argv
[0] = SDATA (tem
);
1458 /* Here we encode arguments by the coding system used for sending
1459 data to the process. We don't support using different coding
1460 systems for encoding arguments and for encoding data sent to the
1463 for (i
= 3; i
< nargs
; i
++)
1467 if (STRING_MULTIBYTE (tem
))
1468 tem
= (code_convert_string_norecord
1469 (tem
, XPROCESS (proc
)->encode_coding_system
, 1));
1470 new_argv
[i
- 2] = SDATA (tem
);
1472 new_argv
[i
- 2] = 0;
1473 #endif /* not VMS */
1475 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
1476 XPROCESS (proc
)->decoding_carryover
= make_number (0);
1477 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
1478 XPROCESS (proc
)->encoding_carryover
= make_number (0);
1480 XPROCESS (proc
)->inherit_coding_system_flag
1481 = (NILP (buffer
) || !inherit_process_coding_system
1484 create_process (proc
, (char **) new_argv
, current_dir
);
1486 return unbind_to (count
, proc
);
1489 /* This function is the unwind_protect form for Fstart_process. If
1490 PROC doesn't have its pid set, then we know someone has signaled
1491 an error and the process wasn't started successfully, so we should
1492 remove it from the process list. */
1494 start_process_unwind (proc
)
1497 if (!PROCESSP (proc
))
1500 /* Was PROC started successfully? */
1501 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1502 remove_process (proc
);
1508 create_process_1 (timer
)
1509 struct atimer
*timer
;
1511 /* Nothing to do. */
1515 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1518 /* Mimic blocking of signals on system V, which doesn't really have it. */
1520 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1521 int sigchld_deferred
;
1524 create_process_sigchld ()
1526 signal (SIGCHLD
, create_process_sigchld
);
1528 sigchld_deferred
= 1;
1534 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1536 create_process (process
, new_argv
, current_dir
)
1537 Lisp_Object process
;
1539 Lisp_Object current_dir
;
1541 int pid
, inchannel
, outchannel
;
1543 #ifdef POSIX_SIGNALS
1546 struct sigaction sigint_action
;
1547 struct sigaction sigquit_action
;
1549 struct sigaction sighup_action
;
1551 #else /* !POSIX_SIGNALS */
1554 SIGTYPE (*sigchld
)();
1557 #endif /* !POSIX_SIGNALS */
1558 /* Use volatile to protect variables from being clobbered by longjmp. */
1559 volatile int forkin
, forkout
;
1560 volatile int pty_flag
= 0;
1562 extern char **environ
;
1565 inchannel
= outchannel
= -1;
1568 if (!NILP (Vprocess_connection_type
))
1569 outchannel
= inchannel
= allocate_pty ();
1573 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1574 /* On most USG systems it does not work to open the pty's tty here,
1575 then close it and reopen it in the child. */
1577 /* Don't let this terminal become our controlling terminal
1578 (in case we don't have one). */
1579 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1581 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1584 report_file_error ("Opening pty", Qnil
);
1586 forkin
= forkout
= -1;
1587 #endif /* not USG, or USG_SUBTTY_WORKS */
1591 #endif /* HAVE_PTYS */
1594 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1595 report_file_error ("Opening socketpair", Qnil
);
1596 outchannel
= inchannel
= sv
[0];
1597 forkout
= forkin
= sv
[1];
1599 #else /* not SKTPAIR */
1604 report_file_error ("Creating pipe", Qnil
);
1610 emacs_close (inchannel
);
1611 emacs_close (forkout
);
1612 report_file_error ("Creating pipe", Qnil
);
1617 #endif /* not SKTPAIR */
1620 /* Replaced by close_process_descs */
1621 set_exclusive_use (inchannel
);
1622 set_exclusive_use (outchannel
);
1625 /* Stride people say it's a mystery why this is needed
1626 as well as the O_NDELAY, but that it fails without this. */
1627 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1630 ioctl (inchannel
, FIONBIO
, &one
);
1635 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1636 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1639 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1640 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1644 /* Record this as an active process, with its channels.
1645 As a result, child_setup will close Emacs's side of the pipes. */
1646 chan_process
[inchannel
] = process
;
1647 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1648 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1649 /* Record the tty descriptor used in the subprocess. */
1651 XPROCESS (process
)->subtty
= Qnil
;
1653 XSETFASTINT (XPROCESS (process
)->subtty
, forkin
);
1654 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1655 XPROCESS (process
)->status
= Qrun
;
1656 if (!proc_decode_coding_system
[inchannel
])
1657 proc_decode_coding_system
[inchannel
]
1658 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
1659 setup_coding_system (XPROCESS (process
)->decode_coding_system
,
1660 proc_decode_coding_system
[inchannel
]);
1661 if (!proc_encode_coding_system
[outchannel
])
1662 proc_encode_coding_system
[outchannel
]
1663 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
1664 setup_coding_system (XPROCESS (process
)->encode_coding_system
,
1665 proc_encode_coding_system
[outchannel
]);
1667 /* Delay interrupts until we have a chance to store
1668 the new fork's pid in its process structure */
1669 #ifdef POSIX_SIGNALS
1670 sigemptyset (&blocked
);
1672 sigaddset (&blocked
, SIGCHLD
);
1674 #ifdef HAVE_WORKING_VFORK
1675 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1676 this sets the parent's signal handlers as well as the child's.
1677 So delay all interrupts whose handlers the child might munge,
1678 and record the current handlers so they can be restored later. */
1679 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1680 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1682 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1684 #endif /* HAVE_WORKING_VFORK */
1685 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1686 #else /* !POSIX_SIGNALS */
1690 #else /* not BSD4_1 */
1691 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1692 sigsetmask (sigmask (SIGCHLD
));
1693 #else /* ordinary USG */
1695 sigchld_deferred
= 0;
1696 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1698 #endif /* ordinary USG */
1699 #endif /* not BSD4_1 */
1700 #endif /* SIGCHLD */
1701 #endif /* !POSIX_SIGNALS */
1703 FD_SET (inchannel
, &input_wait_mask
);
1704 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1705 if (inchannel
> max_process_desc
)
1706 max_process_desc
= inchannel
;
1708 /* Until we store the proper pid, enable sigchld_handler
1709 to recognize an unknown pid as standing for this process.
1710 It is very important not to let this `marker' value stay
1711 in the table after this function has returned; if it does
1712 it might cause call-process to hang and subsequent asynchronous
1713 processes to get their return values scrambled. */
1714 XSETINT (XPROCESS (process
)->pid
, -1);
1719 /* child_setup must clobber environ on systems with true vfork.
1720 Protect it from permanent change. */
1721 char **save_environ
= environ
;
1723 current_dir
= ENCODE_FILE (current_dir
);
1728 #endif /* not WINDOWSNT */
1730 int xforkin
= forkin
;
1731 int xforkout
= forkout
;
1733 #if 0 /* This was probably a mistake--it duplicates code later on,
1734 but fails to handle all the cases. */
1735 /* Make sure SIGCHLD is not blocked in the child. */
1736 sigsetmask (SIGEMPTYMASK
);
1739 /* Make the pty be the controlling terminal of the process. */
1741 /* First, disconnect its current controlling terminal. */
1743 /* We tried doing setsid only if pty_flag, but it caused
1744 process_set_signal to fail on SGI when using a pipe. */
1746 /* Make the pty's terminal the controlling terminal. */
1750 /* We ignore the return value
1751 because faith@cs.unc.edu says that is necessary on Linux. */
1752 ioctl (xforkin
, TIOCSCTTY
, 0);
1755 #else /* not HAVE_SETSID */
1757 /* It's very important to call setpgrp here and no time
1758 afterwards. Otherwise, we lose our controlling tty which
1759 is set when we open the pty. */
1762 #endif /* not HAVE_SETSID */
1763 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1764 if (pty_flag
&& xforkin
>= 0)
1767 tcgetattr (xforkin
, &t
);
1769 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1770 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1773 #if defined (NTTYDISC) && defined (TIOCSETD)
1774 if (pty_flag
&& xforkin
>= 0)
1776 /* Use new line discipline. */
1777 int ldisc
= NTTYDISC
;
1778 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1783 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1784 can do TIOCSPGRP only to the process's controlling tty. */
1787 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1788 I can't test it since I don't have 4.3. */
1789 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1790 ioctl (j
, TIOCNOTTY
, 0);
1793 /* In order to get a controlling terminal on some versions
1794 of BSD, it is necessary to put the process in pgrp 0
1795 before it opens the terminal. */
1803 #endif /* TIOCNOTTY */
1805 #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY)
1806 /*** There is a suggestion that this ought to be a
1807 conditional on TIOCSPGRP,
1808 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1809 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1810 that system does seem to need this code, even though
1811 both HAVE_SETSID and TIOCSCTTY are defined. */
1812 /* Now close the pty (if we had it open) and reopen it.
1813 This makes the pty the controlling terminal of the subprocess. */
1816 #ifdef SET_CHILD_PTY_PGRP
1817 int pgrp
= getpid ();
1820 /* I wonder if emacs_close (emacs_open (pty_name, ...))
1823 emacs_close (xforkin
);
1824 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
1828 emacs_write (1, "Couldn't open the pty terminal ", 31);
1829 emacs_write (1, pty_name
, strlen (pty_name
));
1830 emacs_write (1, "\n", 1);
1834 #ifdef SET_CHILD_PTY_PGRP
1835 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1836 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1839 #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */
1841 #ifdef SETUP_SLAVE_PTY
1846 #endif /* SETUP_SLAVE_PTY */
1848 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1849 Now reenable it in the child, so it will die when we want it to. */
1851 signal (SIGHUP
, SIG_DFL
);
1853 #endif /* HAVE_PTYS */
1855 signal (SIGINT
, SIG_DFL
);
1856 signal (SIGQUIT
, SIG_DFL
);
1858 /* Stop blocking signals in the child. */
1859 #ifdef POSIX_SIGNALS
1860 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1861 #else /* !POSIX_SIGNALS */
1865 #else /* not BSD4_1 */
1866 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1867 sigsetmask (SIGEMPTYMASK
);
1868 #else /* ordinary USG */
1870 signal (SIGCHLD
, sigchld
);
1872 #endif /* ordinary USG */
1873 #endif /* not BSD4_1 */
1874 #endif /* SIGCHLD */
1875 #endif /* !POSIX_SIGNALS */
1878 child_setup_tty (xforkout
);
1880 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1881 new_argv
, 1, current_dir
);
1882 #else /* not WINDOWSNT */
1883 child_setup (xforkin
, xforkout
, xforkout
,
1884 new_argv
, 1, current_dir
);
1885 #endif /* not WINDOWSNT */
1887 environ
= save_environ
;
1892 /* This runs in the Emacs process. */
1896 emacs_close (forkin
);
1897 if (forkin
!= forkout
&& forkout
>= 0)
1898 emacs_close (forkout
);
1902 /* vfork succeeded. */
1903 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
1906 register_child (pid
, inchannel
);
1907 #endif /* WINDOWSNT */
1909 /* If the subfork execv fails, and it exits,
1910 this close hangs. I don't know why.
1911 So have an interrupt jar it loose. */
1913 struct atimer
*timer
;
1917 EMACS_SET_SECS_USECS (offset
, 1, 0);
1918 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
1920 XPROCESS (process
)->subtty
= Qnil
;
1922 emacs_close (forkin
);
1924 cancel_atimer (timer
);
1928 if (forkin
!= forkout
&& forkout
>= 0)
1929 emacs_close (forkout
);
1933 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1936 XPROCESS (process
)->tty_name
= Qnil
;
1939 /* Restore the signal state whether vfork succeeded or not.
1940 (We will signal an error, below, if it failed.) */
1941 #ifdef POSIX_SIGNALS
1942 #ifdef HAVE_WORKING_VFORK
1943 /* Restore the parent's signal handlers. */
1944 sigaction (SIGINT
, &sigint_action
, 0);
1945 sigaction (SIGQUIT
, &sigquit_action
, 0);
1947 sigaction (SIGHUP
, &sighup_action
, 0);
1949 #endif /* HAVE_WORKING_VFORK */
1950 /* Stop blocking signals in the parent. */
1951 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1952 #else /* !POSIX_SIGNALS */
1956 #else /* not BSD4_1 */
1957 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1958 sigsetmask (SIGEMPTYMASK
);
1959 #else /* ordinary USG */
1961 signal (SIGCHLD
, sigchld
);
1962 /* Now really handle any of these signals
1963 that came in during this function. */
1964 if (sigchld_deferred
)
1965 kill (getpid (), SIGCHLD
);
1967 #endif /* ordinary USG */
1968 #endif /* not BSD4_1 */
1969 #endif /* SIGCHLD */
1970 #endif /* !POSIX_SIGNALS */
1972 /* Now generate the error if vfork failed. */
1974 report_file_error ("Doing vfork", Qnil
);
1976 #endif /* not VMS */
1981 /* Convert an internal struct sockaddr to a lisp object (vector or string).
1982 The address family of sa is not included in the result. */
1985 conv_sockaddr_to_lisp (sa
, len
)
1986 struct sockaddr
*sa
;
1989 Lisp_Object address
;
1992 register struct Lisp_Vector
*p
;
1994 switch (sa
->sa_family
)
1998 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
1999 len
= sizeof (sin
->sin_addr
) + 1;
2000 address
= Fmake_vector (make_number (len
), Qnil
);
2001 p
= XVECTOR (address
);
2002 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2003 cp
= (unsigned char *)&sin
->sin_addr
;
2006 #ifdef HAVE_LOCAL_SOCKETS
2009 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2010 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2011 if (sockun
->sun_path
[i
] == 0)
2013 return make_unibyte_string (sockun
->sun_path
, i
);
2017 len
-= sizeof (sa
->sa_family
);
2018 address
= Fcons (make_number (sa
->sa_family
),
2019 Fmake_vector (make_number (len
), Qnil
));
2020 p
= XVECTOR (XCDR (address
));
2021 cp
= (unsigned char *) sa
+ sizeof (sa
->sa_family
);
2027 p
->contents
[i
++] = make_number (*cp
++);
2033 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2036 get_lisp_to_sockaddr_size (address
, familyp
)
2037 Lisp_Object address
;
2040 register struct Lisp_Vector
*p
;
2042 if (VECTORP (address
))
2044 p
= XVECTOR (address
);
2048 return sizeof (struct sockaddr_in
);
2051 #ifdef HAVE_LOCAL_SOCKETS
2052 else if (STRINGP (address
))
2054 *familyp
= AF_LOCAL
;
2055 return sizeof (struct sockaddr_un
);
2058 else if (CONSP (address
) && INTEGERP (XCAR (address
)) && VECTORP (XCDR (address
)))
2060 struct sockaddr
*sa
;
2061 *familyp
= XINT (XCAR (address
));
2062 p
= XVECTOR (XCDR (address
));
2063 return p
->size
+ sizeof (sa
->sa_family
);
2068 /* Convert an address object (vector or string) to an internal sockaddr.
2069 Format of address has already been validated by size_lisp_to_sockaddr. */
2072 conv_lisp_to_sockaddr (family
, address
, sa
, len
)
2074 Lisp_Object address
;
2075 struct sockaddr
*sa
;
2078 register struct Lisp_Vector
*p
;
2079 register unsigned char *cp
;
2083 sa
->sa_family
= family
;
2085 if (VECTORP (address
))
2087 p
= XVECTOR (address
);
2088 if (family
== AF_INET
)
2090 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2091 len
= sizeof (sin
->sin_addr
) + 1;
2092 i
= XINT (p
->contents
[--len
]);
2093 sin
->sin_port
= htons (i
);
2094 cp
= (unsigned char *)&sin
->sin_addr
;
2097 else if (STRINGP (address
))
2099 #ifdef HAVE_LOCAL_SOCKETS
2100 if (family
== AF_LOCAL
)
2102 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2103 cp
= SDATA (address
);
2104 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2105 sockun
->sun_path
[i
] = *cp
++;
2112 p
= XVECTOR (XCDR (address
));
2113 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2116 for (i
= 0; i
< len
; i
++)
2117 if (INTEGERP (p
->contents
[i
]))
2118 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2121 #ifdef DATAGRAM_SOCKETS
2122 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2124 doc
: /* Get the current datagram address associated with PROCESS. */)
2126 Lisp_Object process
;
2130 CHECK_PROCESS (process
);
2132 if (!DATAGRAM_CONN_P (process
))
2135 channel
= XINT (XPROCESS (process
)->infd
);
2136 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2137 datagram_address
[channel
].len
);
2140 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2142 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2143 Returns nil upon error setting address, ADDRESS otherwise. */)
2145 Lisp_Object process
, address
;
2150 CHECK_PROCESS (process
);
2152 if (!DATAGRAM_CONN_P (process
))
2155 channel
= XINT (XPROCESS (process
)->infd
);
2157 len
= get_lisp_to_sockaddr_size (address
, &family
);
2158 if (datagram_address
[channel
].len
!= len
)
2160 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2166 static struct socket_options
{
2167 /* The name of this option. Should be lowercase version of option
2168 name without SO_ prefix. */
2170 /* Length of name. */
2172 /* Option level SOL_... */
2174 /* Option number SO_... */
2176 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_STR
, SOPT_LINGER
} opttype
;
2177 } socket_options
[] =
2179 #ifdef SO_BINDTODEVICE
2180 { "bindtodevice", 12, SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_STR
},
2183 { "broadcast", 9, SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
},
2186 { "dontroute", 9, SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
},
2189 { "keepalive", 9, SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
},
2192 { "linger", 6, SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
},
2195 { "oobinline", 9, SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
},
2198 { "priority", 8, SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
},
2201 { "reuseaddr", 9, SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
},
2203 { 0, 0, 0, 0, SOPT_UNKNOWN
}
2206 /* Process list of socket options OPTS on socket S.
2207 Only check if options are supported is S < 0.
2208 If NO_ERROR is non-zero, continue silently if an option
2211 Each element specifies one option. An element is either a string
2212 "OPTION=VALUE" or a cons (OPTION . VALUE) where OPTION is a string
2216 set_socket_options (s
, opts
, no_error
)
2222 opts
= Fcons (opts
, Qnil
);
2224 while (CONSP (opts
))
2229 struct socket_options
*sopt
;
2243 name
= (char *) SDATA (opt
);
2244 else if (SYMBOLP (opt
))
2245 name
= (char *) SDATA (SYMBOL_NAME (opt
));
2247 error ("Mal-formed option list");
2251 if (strncmp (name
, "no", 2) == 0)
2258 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2259 if (strncmp (name
, sopt
->name
, sopt
->nlen
) == 0)
2261 if (name
[sopt
->nlen
] == 0)
2263 if (name
[sopt
->nlen
] == '=')
2265 arg
= name
+ sopt
->nlen
+ 1;
2270 switch (sopt
->opttype
)
2278 optval
= (*arg
== '0' || *arg
== 'n') ? 0 : 1;
2279 else if (INTEGERP (val
))
2280 optval
= XINT (val
) == 0 ? 0 : 1;
2282 optval
= NILP (val
) ? 0 : 1;
2283 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2284 &optval
, sizeof (optval
));
2293 else if (INTEGERP (val
))
2294 optval
= XINT (val
);
2296 error ("Bad option argument for %s", name
);
2299 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2300 &optval
, sizeof (optval
));
2310 else if (STRINGP (val
))
2311 arg
= (char *) SDATA (val
);
2312 else if (XSYMBOL (val
))
2313 arg
= (char *) SDATA (SYMBOL_NAME (val
));
2315 error ("Invalid argument to %s option", name
);
2317 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2324 struct linger linger
;
2327 linger
.l_linger
= 0;
2334 if (*arg
== 'n' || *arg
== 't' || *arg
== 'y')
2335 linger
.l_onoff
= (*arg
== 'n') ? 0 : 1;
2337 linger
.l_linger
= atoi(arg
);
2339 else if (INTEGERP (val
))
2340 linger
.l_linger
= XINT (val
);
2342 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2343 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2344 &linger
, sizeof (linger
));
2353 error ("Unsupported option: %s", name
);
2355 if (ret
< 0 && ! no_error
)
2356 report_file_error ("Cannot set network option: %s", opt
);
2361 DEFUN ("set-network-process-options",
2362 Fset_network_process_options
, Sset_network_process_options
,
2364 doc
: /* Set one or more options for network process PROCESS.
2365 Each option is either a string "OPT=VALUE" or a cons (OPT . VALUE).
2366 A boolean value is false if it either zero or nil, true otherwise.
2368 The following options are known. Consult the relevant system manual
2369 pages for more information.
2371 bindtodevice=NAME -- bind to interface NAME, or remove binding if nil.
2372 broadcast=BOOL -- Allow send and receive of datagram broadcasts.
2373 dontroute=BOOL -- Only send to directly connected hosts.
2374 keepalive=BOOL -- Send keep-alive messages on network stream.
2375 linger=BOOL or TIMEOUT -- Send queued messages before closing.
2376 oobinline=BOOL -- Place out-of-band data in receive data stream.
2377 priority=INT -- Set protocol defined priority for sent packets.
2378 reuseaddr=BOOL -- Allow reusing a recently used address.
2380 usage: (set-network-process-options PROCESS &rest OPTIONS) */)
2385 Lisp_Object process
;
2389 CHECK_PROCESS (process
);
2390 if (nargs
> 1 && XINT (XPROCESS (process
)->infd
) >= 0)
2392 opts
= Flist (nargs
, args
);
2393 set_socket_options (XINT (XPROCESS (process
)->infd
), opts
, 0);
2398 /* A version of request_sigio suitable for a record_unwind_protect. */
2401 unwind_request_sigio (dummy
)
2404 if (interrupt_input
)
2409 /* Create a network stream/datagram client/server process. Treated
2410 exactly like a normal process when reading and writing. Primary
2411 differences are in status display and process deletion. A network
2412 connection has no PID; you cannot signal it. All you can do is
2413 stop/continue it and deactivate/close it via delete-process */
2415 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2417 doc
: /* Create and return a network server or client process.
2419 In Emacs, network connections are represented by process objects, so
2420 input and output work as for subprocesses and `delete-process' closes
2421 a network connection. However, a network process has no process id,
2422 it cannot be signalled, and the status codes are different from normal
2425 Arguments are specified as keyword/argument pairs. The following
2426 arguments are defined:
2428 :name NAME -- NAME is name for process. It is modified if necessary
2431 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2432 with the process. Process output goes at end of that buffer, unless
2433 you specify an output stream or filter function to handle the output.
2434 BUFFER may be also nil, meaning that this process is not associated
2437 :host HOST -- HOST is name of the host to connect to, or its IP
2438 address. The symbol `local' specifies the local host. If specified
2439 for a server process, it must be a valid name or address for the local
2440 host, and only clients connecting to that address will be accepted.
2442 :service SERVICE -- SERVICE is name of the service desired, or an
2443 integer specifying a port number to connect to. If SERVICE is t,
2444 a random port number is selected for the server.
2446 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2447 stream type connection, `datagram' creates a datagram type connection.
2449 :family FAMILY -- FAMILY is the address (and protocol) family for the
2450 service specified by HOST and SERVICE. The default address family is
2451 Inet (or IPv4) for the host and port number specified by HOST and
2452 SERVICE. Other address families supported are:
2453 local -- for a local (i.e. UNIX) address specified by SERVICE.
2455 :local ADDRESS -- ADDRESS is the local address used for the connection.
2456 This parameter is ignored when opening a client process. When specified
2457 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2459 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2460 connection. This parameter is ignored when opening a stream server
2461 process. For a datagram server process, it specifies the initial
2462 setting of the remote datagram address. When specified for a client
2463 process, the FAMILY, HOST, and SERVICE args are ignored.
2465 The format of ADDRESS depends on the address family:
2466 - An IPv4 address is represented as an vector of integers [A B C D P]
2467 corresponding to numeric IP address A.B.C.D and port number P.
2468 - A local address is represented as a string with the address in the
2469 local address space.
2470 - An "unsupported family" address is represented by a cons (F . AV)
2471 where F is the family number and AV is a vector containing the socket
2472 address data with one element per address data byte. Do not rely on
2473 this format in portable code, as it may depend on implementation
2474 defined constants, data sizes, and data structure alignment.
2476 :coding CODING -- CODING is coding system for this process.
2478 :options OPTIONS -- Set the specified options for the network process.
2479 See `set-network-process-options' for details.
2481 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2482 return without waiting for the connection to complete; instead, the
2483 sentinel function will be called with second arg matching "open" (if
2484 successful) or "failed" when the connect completes. Default is to use
2485 a blocking connect (i.e. wait) for stream type connections.
2487 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2488 running when emacs is exited.
2490 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2491 In the stopped state, a server process does not accept new
2492 connections, and a client process does not handle incoming traffic.
2493 The stopped state is cleared by `continue-process' and set by
2496 :filter FILTER -- Install FILTER as the process filter.
2498 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2500 :log LOG -- Install LOG as the server process log function. This
2501 function is called as when the server accepts a network connection from a
2502 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2503 is the server process, CLIENT is the new process for the connection,
2504 and MESSAGE is a string.
2506 :server BOOL -- if BOOL is non-nil, create a server process for the
2507 specified FAMILY, SERVICE, and connection type (stream or datagram).
2508 Default is a client process.
2510 A server process will listen for and accept connections from
2511 clients. When a client connection is accepted, a new network process
2512 is created for the connection with the following parameters:
2513 - The client's process name is constructed by concatenating the server
2514 process' NAME and a client identification string.
2515 - If the FILTER argument is non-nil, the client process will not get a
2516 separate process buffer; otherwise, the client's process buffer is a newly
2517 created buffer named after the server process' BUFFER name or process
2518 NAME concatenated with the client identification string.
2519 - The connection type and the process filter and sentinel parameters are
2520 inherited from the server process' TYPE, FILTER and SENTINEL.
2521 - The client process' contact info is set according to the client's
2522 addressing information (typically an IP address and a port number).
2524 Notice that the FILTER and SENTINEL args are never used directly by
2525 the server process. Also, the BUFFER argument is not used directly by
2526 the server process, but via `network-server-log-function' hook, a log
2527 of the accepted (and failed) connections may be recorded in the server
2530 usage: (make-network-process &rest ARGS) */)
2536 Lisp_Object contact
;
2537 struct Lisp_Process
*p
;
2538 #ifdef HAVE_GETADDRINFO
2539 struct addrinfo ai
, *res
, *lres
;
2540 struct addrinfo hints
;
2541 char *portstring
, portbuf
[128];
2542 #else /* HAVE_GETADDRINFO */
2543 struct _emacs_addrinfo
2549 struct sockaddr
*ai_addr
;
2550 struct _emacs_addrinfo
*ai_next
;
2552 #endif /* HAVE_GETADDRINFO */
2553 struct sockaddr_in address_in
;
2554 #ifdef HAVE_LOCAL_SOCKETS
2555 struct sockaddr_un address_un
;
2560 int s
= -1, outch
, inch
;
2561 struct gcpro gcpro1
;
2563 int count
= SPECPDL_INDEX ();
2565 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2567 Lisp_Object name
, buffer
, host
, service
, address
;
2568 Lisp_Object filter
, sentinel
;
2569 int is_non_blocking_client
= 0;
2577 /* Save arguments for process-contact and clone-process. */
2578 contact
= Flist (nargs
, args
);
2582 /* Ensure socket support is loaded if available. */
2583 init_winsock (TRUE
);
2586 /* :type TYPE (nil: stream, datagram */
2587 tem
= Fplist_get (contact
, QCtype
);
2589 socktype
= SOCK_STREAM
;
2590 #ifdef DATAGRAM_SOCKETS
2591 else if (EQ (tem
, Qdatagram
))
2592 socktype
= SOCK_DGRAM
;
2595 error ("Unsupported connection type");
2598 tem
= Fplist_get (contact
, QCserver
);
2601 /* Don't support network sockets when non-blocking mode is
2602 not available, since a blocked Emacs is not useful. */
2603 #if defined(TERM) || (!defined(O_NONBLOCK) && !defined(O_NDELAY))
2604 error ("Network servers not supported");
2610 /* Make QCaddress an alias for :local (server) or :remote (client). */
2611 QCaddress
= is_server
? QClocal
: QCremote
;
2614 if (!is_server
&& socktype
== SOCK_STREAM
2615 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2617 #ifndef NON_BLOCKING_CONNECT
2618 error ("Non-blocking connect not supported");
2620 is_non_blocking_client
= 1;
2624 name
= Fplist_get (contact
, QCname
);
2625 buffer
= Fplist_get (contact
, QCbuffer
);
2626 filter
= Fplist_get (contact
, QCfilter
);
2627 sentinel
= Fplist_get (contact
, QCsentinel
);
2629 CHECK_STRING (name
);
2632 /* Let's handle TERM before things get complicated ... */
2633 host
= Fplist_get (contact
, QChost
);
2634 CHECK_STRING (host
);
2636 service
= Fplist_get (contact
, QCservice
);
2637 if (INTEGERP (service
))
2638 port
= htons ((unsigned short) XINT (service
));
2641 struct servent
*svc_info
;
2642 CHECK_STRING (service
);
2643 svc_info
= getservbyname (SDATA (service
), "tcp");
2645 error ("Unknown service: %s", SDATA (service
));
2646 port
= svc_info
->s_port
;
2649 s
= connect_server (0);
2651 report_file_error ("error creating socket", Fcons (name
, Qnil
));
2652 send_command (s
, C_PORT
, 0, "%s:%d", SDATA (host
), ntohs (port
));
2653 send_command (s
, C_DUMB
, 1, 0);
2655 #else /* not TERM */
2657 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2658 ai
.ai_socktype
= socktype
;
2663 /* :local ADDRESS or :remote ADDRESS */
2664 address
= Fplist_get (contact
, QCaddress
);
2665 if (!NILP (address
))
2667 host
= service
= Qnil
;
2669 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
2670 error ("Malformed :address");
2671 ai
.ai_family
= family
;
2672 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
2673 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
2677 /* :family FAMILY -- nil (for Inet), local, or integer. */
2678 tem
= Fplist_get (contact
, QCfamily
);
2680 family
= XINT (tem
);
2685 #ifdef HAVE_LOCAL_SOCKETS
2686 else if (EQ (tem
, Qlocal
))
2691 error ("Unknown address family");
2692 ai
.ai_family
= family
;
2694 /* :service SERVICE -- string, integer (port number), or t (random port). */
2695 service
= Fplist_get (contact
, QCservice
);
2697 #ifdef HAVE_LOCAL_SOCKETS
2698 if (family
== AF_LOCAL
)
2700 /* Host is not used. */
2702 CHECK_STRING (service
);
2703 bzero (&address_un
, sizeof address_un
);
2704 address_un
.sun_family
= AF_LOCAL
;
2705 strncpy (address_un
.sun_path
, SDATA (service
), sizeof address_un
.sun_path
);
2706 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
2707 ai
.ai_addrlen
= sizeof address_un
;
2712 /* :host HOST -- hostname, ip address, or 'local for localhost. */
2713 host
= Fplist_get (contact
, QChost
);
2716 if (EQ (host
, Qlocal
))
2717 host
= build_string ("localhost");
2718 CHECK_STRING (host
);
2721 /* Slow down polling to every ten seconds.
2722 Some kernels have a bug which causes retrying connect to fail
2723 after a connect. Polling can interfere with gethostbyname too. */
2724 #ifdef POLL_FOR_INPUT
2725 if (socktype
== SOCK_STREAM
)
2727 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
2728 bind_polling_period (10);
2732 #ifdef HAVE_GETADDRINFO
2733 /* If we have a host, use getaddrinfo to resolve both host and service.
2734 Otherwise, use getservbyname to lookup the service. */
2738 /* SERVICE can either be a string or int.
2739 Convert to a C string for later use by getaddrinfo. */
2740 if (EQ (service
, Qt
))
2742 else if (INTEGERP (service
))
2744 sprintf (portbuf
, "%ld", (long) XINT (service
));
2745 portstring
= portbuf
;
2749 CHECK_STRING (service
);
2750 portstring
= SDATA (service
);
2755 memset (&hints
, 0, sizeof (hints
));
2757 hints
.ai_family
= NILP (Fplist_member (contact
, QCfamily
)) ? AF_UNSPEC
: family
;
2758 hints
.ai_socktype
= socktype
;
2759 hints
.ai_protocol
= 0;
2760 ret
= getaddrinfo (SDATA (host
), portstring
, &hints
, &res
);
2762 #ifdef HAVE_GAI_STRERROR
2763 error ("%s/%s %s", SDATA (host
), portstring
, gai_strerror(ret
));
2765 error ("%s/%s getaddrinfo error %d", SDATA (host
), portstring
, ret
);
2771 #endif /* HAVE_GETADDRINFO */
2773 /* We end up here if getaddrinfo is not defined, or in case no hostname
2774 has been specified (e.g. for a local server process). */
2776 if (EQ (service
, Qt
))
2778 else if (INTEGERP (service
))
2779 port
= htons ((unsigned short) XINT (service
));
2782 struct servent
*svc_info
;
2783 CHECK_STRING (service
);
2784 svc_info
= getservbyname (SDATA (service
),
2785 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
2787 error ("Unknown service: %s", SDATA (service
));
2788 port
= svc_info
->s_port
;
2791 bzero (&address_in
, sizeof address_in
);
2792 address_in
.sin_family
= family
;
2793 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
2794 address_in
.sin_port
= port
;
2796 #ifndef HAVE_GETADDRINFO
2799 struct hostent
*host_info_ptr
;
2801 /* gethostbyname may fail with TRY_AGAIN, but we don't honour that,
2802 as it may `hang' emacs for a very long time. */
2805 host_info_ptr
= gethostbyname (SDATA (host
));
2810 bcopy (host_info_ptr
->h_addr
, (char *) &address_in
.sin_addr
,
2811 host_info_ptr
->h_length
);
2812 family
= host_info_ptr
->h_addrtype
;
2813 address_in
.sin_family
= family
;
2816 /* Attempt to interpret host as numeric inet address */
2818 IN_ADDR numeric_addr
;
2819 numeric_addr
= inet_addr ((char *) SDATA (host
));
2820 if (NUMERIC_ADDR_ERROR
)
2821 error ("Unknown host \"%s\"", SDATA (host
));
2823 bcopy ((char *)&numeric_addr
, (char *) &address_in
.sin_addr
,
2824 sizeof (address_in
.sin_addr
));
2828 #endif /* not HAVE_GETADDRINFO */
2830 ai
.ai_family
= family
;
2831 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
2832 ai
.ai_addrlen
= sizeof address_in
;
2836 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
2837 when connect is interrupted. So let's not let it get interrupted.
2838 Note we do not turn off polling, because polling is only used
2839 when not interrupt_input, and thus not normally used on the systems
2840 which have this bug. On systems which use polling, there's no way
2841 to quit if polling is turned off. */
2843 && !is_server
&& socktype
== SOCK_STREAM
)
2845 /* Comment from KFS: The original open-network-stream code
2846 didn't unwind protect this, but it seems like the proper
2847 thing to do. In any case, I don't see how it could harm to
2848 do this -- and it makes cleanup (using unbind_to) easier. */
2849 record_unwind_protect (unwind_request_sigio
, Qnil
);
2853 /* Do this in case we never enter the for-loop below. */
2854 count1
= SPECPDL_INDEX ();
2857 for (lres
= res
; lres
; lres
= lres
->ai_next
)
2859 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
2866 #ifdef DATAGRAM_SOCKETS
2867 if (!is_server
&& socktype
== SOCK_DGRAM
)
2869 #endif /* DATAGRAM_SOCKETS */
2871 #ifdef NON_BLOCKING_CONNECT
2872 if (is_non_blocking_client
)
2875 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
2877 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
2889 /* Make us close S if quit. */
2890 record_unwind_protect (close_file_unwind
, make_number (s
));
2894 /* Configure as a server socket. */
2895 #ifdef HAVE_LOCAL_SOCKETS
2896 if (family
!= AF_LOCAL
)
2900 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
2901 report_file_error ("Cannot set reuse option on server socket.", Qnil
);
2904 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
2905 report_file_error ("Cannot bind server socket", Qnil
);
2907 #ifdef HAVE_GETSOCKNAME
2908 if (EQ (service
, Qt
))
2910 struct sockaddr_in sa1
;
2911 int len1
= sizeof (sa1
);
2912 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
2914 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
2915 service
= make_number (sa1
.sin_port
);
2916 contact
= Fplist_put (contact
, QCservice
, service
);
2921 if (socktype
== SOCK_STREAM
&& listen (s
, 5))
2922 report_file_error ("Cannot listen on server socket", Qnil
);
2932 /* This turns off all alarm-based interrupts; the
2933 bind_polling_period call above doesn't always turn all the
2934 short-interval ones off, especially if interrupt_input is
2937 It'd be nice to be able to control the connect timeout
2938 though. Would non-blocking connect calls be portable?
2940 This used to be conditioned by HAVE_GETADDRINFO. Why? */
2942 turn_on_atimers (0);
2944 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
2947 turn_on_atimers (1);
2949 if (ret
== 0 || xerrno
== EISCONN
)
2951 /* The unwind-protect will be discarded afterwards.
2952 Likewise for immediate_quit. */
2956 #ifdef NON_BLOCKING_CONNECT
2958 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
2962 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
2970 if (xerrno
== EINTR
)
2972 if (xerrno
== EADDRINUSE
&& retry
< 20)
2974 /* A delay here is needed on some FreeBSD systems,
2975 and it is harmless, since this retrying takes time anyway
2976 and should be infrequent. */
2977 Fsleep_for (make_number (1), Qnil
);
2982 /* Discard the unwind protect closing S. */
2983 specpdl_ptr
= specpdl
+ count1
;
2990 #ifdef DATAGRAM_SOCKETS
2991 if (socktype
== SOCK_DGRAM
)
2993 if (datagram_address
[s
].sa
)
2995 datagram_address
[s
].sa
= (struct sockaddr
*) xmalloc (lres
->ai_addrlen
);
2996 datagram_address
[s
].len
= lres
->ai_addrlen
;
3000 bzero (datagram_address
[s
].sa
, lres
->ai_addrlen
);
3001 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3004 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3005 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3006 conv_lisp_to_sockaddr (rfamily
, remote
,
3007 datagram_address
[s
].sa
, rlen
);
3011 bcopy (lres
->ai_addr
, datagram_address
[s
].sa
, lres
->ai_addrlen
);
3014 contact
= Fplist_put (contact
, QCaddress
,
3015 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3018 #ifdef HAVE_GETADDRINFO
3025 /* Discard the unwind protect for closing S, if any. */
3026 specpdl_ptr
= specpdl
+ count1
;
3028 /* Unwind bind_polling_period and request_sigio. */
3029 unbind_to (count
, Qnil
);
3033 /* If non-blocking got this far - and failed - assume non-blocking is
3034 not supported after all. This is probably a wrong assumption, but
3035 the normal blocking calls to open-network-stream handles this error
3037 if (is_non_blocking_client
)
3042 report_file_error ("make server process failed", contact
);
3044 report_file_error ("make client process failed", contact
);
3047 tem
= Fplist_get (contact
, QCoptions
);
3049 set_socket_options (s
, tem
, 1);
3051 #endif /* not TERM */
3057 buffer
= Fget_buffer_create (buffer
);
3058 proc
= make_process (name
);
3060 chan_process
[inch
] = proc
;
3063 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3066 fcntl (inch
, F_SETFL
, O_NDELAY
);
3070 p
= XPROCESS (proc
);
3072 p
->childp
= contact
;
3074 p
->sentinel
= sentinel
;
3076 p
->log
= Fplist_get (contact
, QClog
);
3077 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3078 p
->kill_without_query
= Qt
;
3079 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3082 XSETINT (p
->infd
, inch
);
3083 XSETINT (p
->outfd
, outch
);
3084 if (is_server
&& socktype
== SOCK_STREAM
)
3085 p
->status
= Qlisten
;
3087 #ifdef NON_BLOCKING_CONNECT
3088 if (is_non_blocking_client
)
3090 /* We may get here if connect did succeed immediately. However,
3091 in that case, we still need to signal this like a non-blocking
3093 p
->status
= Qconnect
;
3094 if (!FD_ISSET (inch
, &connect_wait_mask
))
3096 FD_SET (inch
, &connect_wait_mask
);
3097 num_pending_connects
++;
3102 /* A server may have a client filter setting of Qt, but it must
3103 still listen for incoming connects unless it is stopped. */
3104 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3105 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3107 FD_SET (inch
, &input_wait_mask
);
3108 FD_SET (inch
, &non_keyboard_wait_mask
);
3111 if (inch
> max_process_desc
)
3112 max_process_desc
= inch
;
3114 tem
= Fplist_member (contact
, QCcoding
);
3115 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3116 tem
= Qnil
; /* No error message (too late!). */
3119 /* Setup coding systems for communicating with the network stream. */
3120 struct gcpro gcpro1
;
3121 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3122 Lisp_Object coding_systems
= Qt
;
3123 Lisp_Object args
[5], val
;
3126 val
= XCAR (XCDR (tem
));
3127 else if (!NILP (Vcoding_system_for_read
))
3128 val
= Vcoding_system_for_read
;
3129 else if ((!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
))
3130 || (NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
)))
3131 /* We dare not decode end-of-line format by setting VAL to
3132 Qraw_text, because the existing Emacs Lisp libraries
3133 assume that they receive bare code including a sequene of
3138 args
[0] = Qopen_network_stream
, args
[1] = name
,
3139 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3141 coding_systems
= Ffind_operation_coding_system (5, args
);
3143 if (CONSP (coding_systems
))
3144 val
= XCAR (coding_systems
);
3145 else if (CONSP (Vdefault_process_coding_system
))
3146 val
= XCAR (Vdefault_process_coding_system
);
3150 p
->decode_coding_system
= val
;
3153 val
= XCAR (XCDR (tem
));
3154 else if (!NILP (Vcoding_system_for_write
))
3155 val
= Vcoding_system_for_write
;
3156 else if (NILP (current_buffer
->enable_multibyte_characters
))
3160 if (EQ (coding_systems
, Qt
))
3162 args
[0] = Qopen_network_stream
, args
[1] = name
,
3163 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3165 coding_systems
= Ffind_operation_coding_system (5, args
);
3168 if (CONSP (coding_systems
))
3169 val
= XCDR (coding_systems
);
3170 else if (CONSP (Vdefault_process_coding_system
))
3171 val
= XCDR (Vdefault_process_coding_system
);
3175 p
->encode_coding_system
= val
;
3178 if (!proc_decode_coding_system
[inch
])
3179 proc_decode_coding_system
[inch
]
3180 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
3181 setup_coding_system (p
->decode_coding_system
,
3182 proc_decode_coding_system
[inch
]);
3183 if (!proc_encode_coding_system
[outch
])
3184 proc_encode_coding_system
[outch
]
3185 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
3186 setup_coding_system (p
->encode_coding_system
,
3187 proc_encode_coding_system
[outch
]);
3189 p
->decoding_buf
= make_uninit_string (0);
3190 p
->decoding_carryover
= make_number (0);
3191 p
->encoding_buf
= make_uninit_string (0);
3192 p
->encoding_carryover
= make_number (0);
3194 p
->inherit_coding_system_flag
3195 = (!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
3201 #endif /* HAVE_SOCKETS */
3204 deactivate_process (proc
)
3207 register int inchannel
, outchannel
;
3208 register struct Lisp_Process
*p
= XPROCESS (proc
);
3210 inchannel
= XINT (p
->infd
);
3211 outchannel
= XINT (p
->outfd
);
3215 /* Beware SIGCHLD hereabouts. */
3216 flush_pending_output (inchannel
);
3219 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
3220 sys$
dassgn (outchannel
);
3221 vs
= get_vms_process_pointer (p
->pid
);
3223 give_back_vms_process_stuff (vs
);
3226 emacs_close (inchannel
);
3227 if (outchannel
>= 0 && outchannel
!= inchannel
)
3228 emacs_close (outchannel
);
3231 XSETINT (p
->infd
, -1);
3232 XSETINT (p
->outfd
, -1);
3233 #ifdef DATAGRAM_SOCKETS
3234 if (DATAGRAM_CHAN_P (inchannel
))
3236 xfree (datagram_address
[inchannel
].sa
);
3237 datagram_address
[inchannel
].sa
= 0;
3238 datagram_address
[inchannel
].len
= 0;
3241 chan_process
[inchannel
] = Qnil
;
3242 FD_CLR (inchannel
, &input_wait_mask
);
3243 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3244 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3246 FD_CLR (inchannel
, &connect_wait_mask
);
3247 if (--num_pending_connects
< 0)
3250 if (inchannel
== max_process_desc
)
3253 /* We just closed the highest-numbered process input descriptor,
3254 so recompute the highest-numbered one now. */
3255 max_process_desc
= 0;
3256 for (i
= 0; i
< MAXDESC
; i
++)
3257 if (!NILP (chan_process
[i
]))
3258 max_process_desc
= i
;
3263 /* Close all descriptors currently in use for communication
3264 with subprocess. This is used in a newly-forked subprocess
3265 to get rid of irrelevant descriptors. */
3268 close_process_descs ()
3272 for (i
= 0; i
< MAXDESC
; i
++)
3274 Lisp_Object process
;
3275 process
= chan_process
[i
];
3276 if (!NILP (process
))
3278 int in
= XINT (XPROCESS (process
)->infd
);
3279 int out
= XINT (XPROCESS (process
)->outfd
);
3282 if (out
>= 0 && in
!= out
)
3289 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3291 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3292 It is read into the process' buffers or given to their filter functions.
3293 Non-nil arg PROCESS means do not return until some output has been received
3295 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of
3296 seconds and microseconds to wait; return after that much time whether
3297 or not there is input.
3298 Return non-nil iff we received any output before the timeout expired. */)
3299 (process
, timeout
, timeout_msecs
)
3300 register Lisp_Object process
, timeout
, timeout_msecs
;
3305 if (! NILP (process
))
3306 CHECK_PROCESS (process
);
3308 if (! NILP (timeout_msecs
))
3310 CHECK_NUMBER (timeout_msecs
);
3311 useconds
= XINT (timeout_msecs
);
3312 if (!INTEGERP (timeout
))
3313 XSETINT (timeout
, 0);
3316 int carry
= useconds
/ 1000000;
3318 XSETINT (timeout
, XINT (timeout
) + carry
);
3319 useconds
-= carry
* 1000000;
3321 /* I think this clause is necessary because C doesn't
3322 guarantee a particular rounding direction for negative
3326 XSETINT (timeout
, XINT (timeout
) - 1);
3327 useconds
+= 1000000;
3334 if (! NILP (timeout
))
3336 CHECK_NUMBER (timeout
);
3337 seconds
= XINT (timeout
);
3338 if (seconds
< 0 || (seconds
== 0 && useconds
== 0))
3350 XSETFASTINT (process
, 0);
3353 (wait_reading_process_input (seconds
, useconds
, process
, 0)
3357 /* Accept a connection for server process SERVER on CHANNEL. */
3359 static int connect_counter
= 0;
3362 server_accept_connection (server
, channel
)
3366 Lisp_Object proc
, caller
, name
, buffer
;
3367 Lisp_Object contact
, host
, service
;
3368 struct Lisp_Process
*ps
= XPROCESS (server
);
3369 struct Lisp_Process
*p
;
3373 struct sockaddr_in in
;
3374 #ifdef HAVE_LOCAL_SOCKETS
3375 struct sockaddr_un un
;
3378 int len
= sizeof saddr
;
3380 s
= accept (channel
, &saddr
.sa
, &len
);
3389 if (code
== EWOULDBLOCK
)
3393 if (!NILP (ps
->log
))
3394 call3 (ps
->log
, server
, Qnil
,
3395 concat3 (build_string ("accept failed with code"),
3396 Fnumber_to_string (make_number (code
)),
3397 build_string ("\n")));
3403 /* Setup a new process to handle the connection. */
3405 /* Generate a unique identification of the caller, and build contact
3406 information for this process. */
3409 switch (saddr
.sa
.sa_family
)
3413 Lisp_Object args
[5];
3414 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
3415 args
[0] = build_string ("%d.%d.%d.%d");
3416 args
[1] = make_number (*ip
++);
3417 args
[2] = make_number (*ip
++);
3418 args
[3] = make_number (*ip
++);
3419 args
[4] = make_number (*ip
++);
3420 host
= Fformat (5, args
);
3421 service
= make_number (ntohs (saddr
.in
.sin_port
));
3423 args
[0] = build_string (" <%s:%d>");
3426 caller
= Fformat (3, args
);
3430 #ifdef HAVE_LOCAL_SOCKETS
3434 caller
= Fnumber_to_string (make_number (connect_counter
));
3435 caller
= concat3 (build_string (" <*"), caller
, build_string ("*>"));
3439 /* Create a new buffer name for this process if it doesn't have a
3440 filter. The new buffer name is based on the buffer name or
3441 process name of the server process concatenated with the caller
3444 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
3448 buffer
= ps
->buffer
;
3450 buffer
= Fbuffer_name (buffer
);
3455 buffer
= concat2 (buffer
, caller
);
3456 buffer
= Fget_buffer_create (buffer
);
3460 /* Generate a unique name for the new server process. Combine the
3461 server process name with the caller identification. */
3463 name
= concat2 (ps
->name
, caller
);
3464 proc
= make_process (name
);
3466 chan_process
[s
] = proc
;
3469 fcntl (s
, F_SETFL
, O_NONBLOCK
);
3472 fcntl (s
, F_SETFL
, O_NDELAY
);
3476 p
= XPROCESS (proc
);
3478 /* Build new contact information for this setup. */
3479 contact
= Fcopy_sequence (ps
->childp
);
3480 contact
= Fplist_put (contact
, QCserver
, Qnil
);
3481 contact
= Fplist_put (contact
, QChost
, host
);
3482 if (!NILP (service
))
3483 contact
= Fplist_put (contact
, QCservice
, service
);
3484 contact
= Fplist_put (contact
, QCremote
,
3485 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
3486 #ifdef HAVE_GETSOCKNAME
3488 if (getsockname (channel
, &saddr
.sa
, &len
) == 0)
3489 contact
= Fplist_put (contact
, QClocal
,
3490 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
3493 p
->childp
= contact
;
3495 p
->sentinel
= ps
->sentinel
;
3496 p
->filter
= ps
->filter
;
3499 XSETINT (p
->infd
, s
);
3500 XSETINT (p
->outfd
, s
);
3503 /* Client processes for accepted connections are not stopped initially. */
3504 if (!EQ (p
->filter
, Qt
))
3506 FD_SET (s
, &input_wait_mask
);
3507 FD_SET (s
, &non_keyboard_wait_mask
);
3510 if (s
> max_process_desc
)
3511 max_process_desc
= s
;
3513 /* Setup coding system for new process based on server process.
3514 This seems to be the proper thing to do, as the coding system
3515 of the new process should reflect the settings at the time the
3516 server socket was opened; not the current settings. */
3518 p
->decode_coding_system
= ps
->decode_coding_system
;
3519 p
->encode_coding_system
= ps
->encode_coding_system
;
3521 if (!proc_decode_coding_system
[s
])
3522 proc_decode_coding_system
[s
]
3523 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
3524 setup_coding_system (p
->decode_coding_system
,
3525 proc_decode_coding_system
[s
]);
3526 if (!proc_encode_coding_system
[s
])
3527 proc_encode_coding_system
[s
]
3528 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
3529 setup_coding_system (p
->encode_coding_system
,
3530 proc_encode_coding_system
[s
]);
3532 p
->decoding_buf
= make_uninit_string (0);
3533 p
->decoding_carryover
= make_number (0);
3534 p
->encoding_buf
= make_uninit_string (0);
3535 p
->encoding_carryover
= make_number (0);
3537 p
->inherit_coding_system_flag
3538 = (NILP (buffer
) ? Qnil
: ps
->inherit_coding_system_flag
);
3540 if (!NILP (ps
->log
))
3541 call3 (ps
->log
, server
, proc
,
3542 concat3 (build_string ("accept from "),
3543 (STRINGP (host
) ? host
: build_string ("-")),
3544 build_string ("\n")));
3546 if (!NILP (p
->sentinel
))
3547 exec_sentinel (proc
,
3548 concat3 (build_string ("open from "),
3549 (STRINGP (host
) ? host
: build_string ("-")),
3550 build_string ("\n")));
3553 /* This variable is different from waiting_for_input in keyboard.c.
3554 It is used to communicate to a lisp process-filter/sentinel (via the
3555 function Fwaiting_for_user_input_p below) whether emacs was waiting
3556 for user-input when that process-filter was called.
3557 waiting_for_input cannot be used as that is by definition 0 when
3558 lisp code is being evalled.
3559 This is also used in record_asynch_buffer_change.
3560 For that purpose, this must be 0
3561 when not inside wait_reading_process_input. */
3562 static int waiting_for_user_input_p
;
3564 /* This is here so breakpoints can be put on it. */
3566 wait_reading_process_input_1 ()
3570 /* Read and dispose of subprocess output while waiting for timeout to
3571 elapse and/or keyboard input to be available.
3574 timeout in seconds, or
3575 zero for no limit, or
3576 -1 means gobble data immediately available but don't wait for any.
3579 an additional duration to wait, measured in microseconds.
3580 If this is nonzero and time_limit is 0, then the timeout
3581 consists of MICROSECS only.
3583 READ_KBD is a lisp value:
3584 0 to ignore keyboard input, or
3585 1 to return when input is available, or
3586 -1 meaning caller will actually read the input, so don't throw to
3587 the quit handler, or
3588 a cons cell, meaning wait until its car is non-nil
3589 (and gobble terminal input into the buffer if any arrives), or
3590 a process object, meaning wait until something arrives from that
3591 process. The return value is true iff we read some input from
3594 DO_DISPLAY != 0 means redisplay should be done to show subprocess
3595 output that arrives.
3597 If READ_KBD is a pointer to a struct Lisp_Process, then the
3598 function returns true iff we received input from that process
3599 before the timeout elapsed.
3600 Otherwise, return true iff we received input from any process. */
3603 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
3604 int time_limit
, microsecs
;
3605 Lisp_Object read_kbd
;
3608 register int channel
, nfds
;
3609 static SELECT_TYPE Available
;
3610 static SELECT_TYPE Connecting
;
3611 int check_connect
, no_avail
;
3614 EMACS_TIME timeout
, end_time
;
3615 int wait_channel
= -1;
3616 struct Lisp_Process
*wait_proc
= 0;
3617 int got_some_input
= 0;
3618 /* Either nil or a cons cell, the car of which is of interest and
3619 may be changed outside of this routine. */
3620 Lisp_Object wait_for_cell
= Qnil
;
3622 FD_ZERO (&Available
);
3623 FD_ZERO (&Connecting
);
3625 /* If read_kbd is a process to watch, set wait_proc and wait_channel
3627 if (PROCESSP (read_kbd
))
3629 wait_proc
= XPROCESS (read_kbd
);
3630 wait_channel
= XINT (wait_proc
->infd
);
3631 XSETFASTINT (read_kbd
, 0);
3634 /* If waiting for non-nil in a cell, record where. */
3635 if (CONSP (read_kbd
))
3637 wait_for_cell
= read_kbd
;
3638 XSETFASTINT (read_kbd
, 0);
3641 waiting_for_user_input_p
= XINT (read_kbd
);
3643 /* Since we may need to wait several times,
3644 compute the absolute time to return at. */
3645 if (time_limit
|| microsecs
)
3647 EMACS_GET_TIME (end_time
);
3648 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
3649 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
3652 /* AlainF 5-Jul-1996
3653 HP-UX 10.10 seem to have problems with signals coming in
3654 Causes "poll: interrupted system call" messages when Emacs is run
3656 Turn off periodic alarms (in case they are in use),
3657 and then turn off any other atimers. */
3659 turn_on_atimers (0);
3664 int timeout_reduced_for_timers
= 0;
3666 /* If calling from keyboard input, do not quit
3667 since we want to return C-g as an input character.
3668 Otherwise, do pending quit if requested. */
3669 if (XINT (read_kbd
) >= 0)
3672 /* Exit now if the cell we're waiting for became non-nil. */
3673 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
3676 /* Compute time from now till when time limit is up */
3677 /* Exit if already run out */
3678 if (time_limit
== -1)
3680 /* -1 specified for timeout means
3681 gobble output available now
3682 but don't wait at all. */
3684 EMACS_SET_SECS_USECS (timeout
, 0, 0);
3686 else if (time_limit
|| microsecs
)
3688 EMACS_GET_TIME (timeout
);
3689 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
3690 if (EMACS_TIME_NEG_P (timeout
))
3695 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
3698 /* Normally we run timers here.
3699 But not if wait_for_cell; in those cases,
3700 the wait is supposed to be short,
3701 and those callers cannot handle running arbitrary Lisp code here. */
3702 if (NILP (wait_for_cell
))
3704 EMACS_TIME timer_delay
;
3708 int old_timers_run
= timers_run
;
3709 struct buffer
*old_buffer
= current_buffer
;
3711 timer_delay
= timer_check (1);
3713 /* If a timer has run, this might have changed buffers
3714 an alike. Make read_key_sequence aware of that. */
3715 if (timers_run
!= old_timers_run
3716 && old_buffer
!= current_buffer
3717 && waiting_for_user_input_p
== -1)
3718 record_asynch_buffer_change ();
3720 if (timers_run
!= old_timers_run
&& do_display
)
3721 /* We must retry, since a timer may have requeued itself
3722 and that could alter the time_delay. */
3723 redisplay_preserve_echo_area (9);
3727 while (!detect_input_pending ());
3729 /* If there is unread keyboard input, also return. */
3730 if (XINT (read_kbd
) != 0
3731 && requeued_events_pending_p ())
3734 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
3736 EMACS_TIME difference
;
3737 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
3738 if (EMACS_TIME_NEG_P (difference
))
3740 timeout
= timer_delay
;
3741 timeout_reduced_for_timers
= 1;
3744 /* If time_limit is -1, we are not going to wait at all. */
3745 else if (time_limit
!= -1)
3747 /* This is so a breakpoint can be put here. */
3748 wait_reading_process_input_1 ();
3752 /* Cause C-g and alarm signals to take immediate action,
3753 and cause input available signals to zero out timeout.
3755 It is important that we do this before checking for process
3756 activity. If we get a SIGCHLD after the explicit checks for
3757 process activity, timeout is the only way we will know. */
3758 if (XINT (read_kbd
) < 0)
3759 set_waiting_for_input (&timeout
);
3761 /* If status of something has changed, and no input is
3762 available, notify the user of the change right away. After
3763 this explicit check, we'll let the SIGCHLD handler zap
3764 timeout to get our attention. */
3765 if (update_tick
!= process_tick
&& do_display
)
3767 SELECT_TYPE Atemp
, Ctemp
;
3769 Atemp
= input_wait_mask
;
3771 /* On Mac OS X, the SELECT system call always says input is
3772 present (for reading) at stdin, even when none is. This
3773 causes the call to SELECT below to return 1 and
3774 status_notify not to be called. As a result output of
3775 subprocesses are incorrectly discarded. */
3778 Ctemp
= connect_wait_mask
;
3779 EMACS_SET_SECS_USECS (timeout
, 0, 0);
3780 if ((select (max (max_process_desc
, max_keyboard_desc
) + 1,
3782 (num_pending_connects
> 0 ? &Ctemp
: (SELECT_TYPE
*)0),
3783 (SELECT_TYPE
*)0, &timeout
)
3786 /* It's okay for us to do this and then continue with
3787 the loop, since timeout has already been zeroed out. */
3788 clear_waiting_for_input ();
3793 /* Don't wait for output from a non-running process. Just
3794 read whatever data has already been received. */
3795 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
3796 update_status (wait_proc
);
3798 && ! EQ (wait_proc
->status
, Qrun
)
3799 && ! EQ (wait_proc
->status
, Qconnect
))
3801 int nread
, total_nread
= 0;
3803 clear_waiting_for_input ();
3804 XSETPROCESS (proc
, wait_proc
);
3806 /* Read data from the process, until we exhaust it. */
3807 while (XINT (wait_proc
->infd
) >= 0)
3809 nread
= read_process_output (proc
, XINT (wait_proc
->infd
));
3815 total_nread
+= nread
;
3817 else if (nread
== -1 && EIO
== errno
)
3821 else if (nread
== -1 && EAGAIN
== errno
)
3825 else if (nread
== -1 && EWOULDBLOCK
== errno
)
3829 if (total_nread
> 0 && do_display
)
3830 redisplay_preserve_echo_area (10);
3835 /* Wait till there is something to do */
3837 if (!NILP (wait_for_cell
))
3839 Available
= non_process_wait_mask
;
3844 if (! XINT (read_kbd
))
3845 Available
= non_keyboard_wait_mask
;
3847 Available
= input_wait_mask
;
3848 check_connect
= (num_pending_connects
> 0);
3851 /* If frame size has changed or the window is newly mapped,
3852 redisplay now, before we start to wait. There is a race
3853 condition here; if a SIGIO arrives between now and the select
3854 and indicates that a frame is trashed, the select may block
3855 displaying a trashed screen. */
3856 if (frame_garbaged
&& do_display
)
3858 clear_waiting_for_input ();
3859 redisplay_preserve_echo_area (11);
3860 if (XINT (read_kbd
) < 0)
3861 set_waiting_for_input (&timeout
);
3865 if (XINT (read_kbd
) && detect_input_pending ())
3873 Connecting
= connect_wait_mask
;
3874 nfds
= select (max (max_process_desc
, max_keyboard_desc
) + 1,
3876 (check_connect
? &Connecting
: (SELECT_TYPE
*)0),
3877 (SELECT_TYPE
*)0, &timeout
);
3882 /* Make C-g and alarm signals set flags again */
3883 clear_waiting_for_input ();
3885 /* If we woke up due to SIGWINCH, actually change size now. */
3886 do_pending_window_change (0);
3888 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
3889 /* We wanted the full specified time, so return now. */
3893 if (xerrno
== EINTR
)
3896 /* Ultrix select seems to return ENOMEM when it is
3897 interrupted. Treat it just like EINTR. Bleah. Note
3898 that we want to test for the "ultrix" CPP symbol, not
3899 "__ultrix__"; the latter is only defined under GCC, but
3900 not by DEC's bundled CC. -JimB */
3901 else if (xerrno
== ENOMEM
)
3905 /* This happens for no known reason on ALLIANT.
3906 I am guessing that this is the right response. -- RMS. */
3907 else if (xerrno
== EFAULT
)
3910 else if (xerrno
== EBADF
)
3913 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
3914 the child's closure of the pts gives the parent a SIGHUP, and
3915 the ptc file descriptor is automatically closed,
3916 yielding EBADF here or at select() call above.
3917 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
3918 in m/ibmrt-aix.h), and here we just ignore the select error.
3919 Cleanup occurs c/o status_notify after SIGCLD. */
3920 no_avail
= 1; /* Cannot depend on values returned */
3926 error ("select error: %s", emacs_strerror (xerrno
));
3931 FD_ZERO (&Available
);
3935 #if defined(sun) && !defined(USG5_4)
3936 if (nfds
> 0 && keyboard_bit_set (&Available
)
3938 /* System sometimes fails to deliver SIGIO.
3940 David J. Mackenzie says that Emacs doesn't compile under
3941 Solaris if this code is enabled, thus the USG5_4 in the CPP
3942 conditional. "I haven't noticed any ill effects so far.
3943 If you find a Solaris expert somewhere, they might know
3945 kill (getpid (), SIGIO
);
3948 #if 0 /* When polling is used, interrupt_input is 0,
3949 so get_input_pending should read the input.
3950 So this should not be needed. */
3951 /* If we are using polling for input,
3952 and we see input available, make it get read now.
3953 Otherwise it might not actually get read for a second.
3954 And on hpux, since we turn off polling in wait_reading_process_input,
3955 it might never get read at all if we don't spend much time
3956 outside of wait_reading_process_input. */
3957 if (XINT (read_kbd
) && interrupt_input
3958 && keyboard_bit_set (&Available
)
3959 && input_polling_used ())
3960 kill (getpid (), SIGALRM
);
3963 /* Check for keyboard input */
3964 /* If there is any, return immediately
3965 to give it higher priority than subprocesses */
3967 if (XINT (read_kbd
) != 0)
3969 int old_timers_run
= timers_run
;
3970 struct buffer
*old_buffer
= current_buffer
;
3973 if (detect_input_pending_run_timers (do_display
))
3975 swallow_events (do_display
);
3976 if (detect_input_pending_run_timers (do_display
))
3980 /* If a timer has run, this might have changed buffers
3981 an alike. Make read_key_sequence aware of that. */
3982 if (timers_run
!= old_timers_run
3983 && waiting_for_user_input_p
== -1
3984 && old_buffer
!= current_buffer
)
3985 record_asynch_buffer_change ();
3991 /* If there is unread keyboard input, also return. */
3992 if (XINT (read_kbd
) != 0
3993 && requeued_events_pending_p ())
3996 /* If we are not checking for keyboard input now,
3997 do process events (but don't run any timers).
3998 This is so that X events will be processed.
3999 Otherwise they may have to wait until polling takes place.
4000 That would causes delays in pasting selections, for example.
4002 (We used to do this only if wait_for_cell.) */
4003 if (XINT (read_kbd
) == 0 && detect_input_pending ())
4005 swallow_events (do_display
);
4006 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4007 if (detect_input_pending ())
4012 /* Exit now if the cell we're waiting for became non-nil. */
4013 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4017 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4018 go read it. This can happen with X on BSD after logging out.
4019 In that case, there really is no input and no SIGIO,
4020 but select says there is input. */
4022 if (XINT (read_kbd
) && interrupt_input
4023 && keyboard_bit_set (&Available
))
4024 kill (getpid (), SIGIO
);
4028 got_some_input
|= nfds
> 0;
4030 /* If checking input just got us a size-change event from X,
4031 obey it now if we should. */
4032 if (XINT (read_kbd
) || ! NILP (wait_for_cell
))
4033 do_pending_window_change (0);
4035 /* Check for data from a process. */
4036 if (no_avail
|| nfds
== 0)
4039 /* Really FIRST_PROC_DESC should be 0 on Unix,
4040 but this is safer in the short run. */
4041 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4043 if (FD_ISSET (channel
, &Available
)
4044 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
4048 /* If waiting for this channel, arrange to return as
4049 soon as no more input to be processed. No more
4051 if (wait_channel
== channel
)
4057 proc
= chan_process
[channel
];
4061 /* If this is a server stream socket, accept connection. */
4062 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4064 server_accept_connection (proc
, channel
);
4068 /* Read data from the process, starting with our
4069 buffered-ahead character if we have one. */
4071 nread
= read_process_output (proc
, channel
);
4074 /* Since read_process_output can run a filter,
4075 which can call accept-process-output,
4076 don't try to read from any other processes
4077 before doing the select again. */
4078 FD_ZERO (&Available
);
4081 redisplay_preserve_echo_area (12);
4084 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4087 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4088 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4090 else if (nread
== -1 && errno
== EAGAIN
)
4094 else if (nread
== -1 && errno
== EAGAIN
)
4096 /* Note that we cannot distinguish between no input
4097 available now and a closed pipe.
4098 With luck, a closed pipe will be accompanied by
4099 subprocess termination and SIGCHLD. */
4100 else if (nread
== 0 && !NETCONN_P (proc
))
4102 #endif /* O_NDELAY */
4103 #endif /* O_NONBLOCK */
4105 /* On some OSs with ptys, when the process on one end of
4106 a pty exits, the other end gets an error reading with
4107 errno = EIO instead of getting an EOF (0 bytes read).
4108 Therefore, if we get an error reading and errno =
4109 EIO, just continue, because the child process has
4110 exited and should clean itself up soon (e.g. when we
4113 However, it has been known to happen that the SIGCHLD
4114 got lost. So raise the signl again just in case.
4116 else if (nread
== -1 && errno
== EIO
)
4117 kill (getpid (), SIGCHLD
);
4118 #endif /* HAVE_PTYS */
4119 /* If we can detect process termination, don't consider the process
4120 gone just because its pipe is closed. */
4122 else if (nread
== 0 && !NETCONN_P (proc
))
4127 /* Preserve status of processes already terminated. */
4128 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
4129 deactivate_process (proc
);
4130 if (!NILP (XPROCESS (proc
)->raw_status_low
))
4131 update_status (XPROCESS (proc
));
4132 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4133 XPROCESS (proc
)->status
4134 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
4137 #ifdef NON_BLOCKING_CONNECT
4138 if (check_connect
&& FD_ISSET (channel
, &Connecting
))
4140 struct Lisp_Process
*p
;
4142 FD_CLR (channel
, &connect_wait_mask
);
4143 if (--num_pending_connects
< 0)
4146 proc
= chan_process
[channel
];
4150 p
= XPROCESS (proc
);
4153 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4154 So only use it on systems where it is known to work. */
4156 int xlen
= sizeof(xerrno
);
4157 if (getsockopt(channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4162 struct sockaddr pname
;
4163 int pnamelen
= sizeof(pname
);
4165 /* If connection failed, getpeername will fail. */
4167 if (getpeername(channel
, &pname
, &pnamelen
) < 0)
4169 /* Obtain connect failure code through error slippage. */
4172 if (errno
== ENOTCONN
&& read(channel
, &dummy
, 1) < 0)
4179 XSETINT (p
->tick
, ++process_tick
);
4180 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
4181 deactivate_process (proc
);
4186 /* Execute the sentinel here. If we had relied on
4187 status_notify to do it later, it will read input
4188 from the process before calling the sentinel. */
4189 exec_sentinel (proc
, build_string ("open\n"));
4190 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4192 FD_SET (XINT (p
->infd
), &input_wait_mask
);
4193 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
4197 #endif /* NON_BLOCKING_CONNECT */
4198 } /* end for each file descriptor */
4199 } /* end while exit conditions not met */
4201 waiting_for_user_input_p
= 0;
4203 /* If calling from keyboard input, do not quit
4204 since we want to return C-g as an input character.
4205 Otherwise, do pending quit if requested. */
4206 if (XINT (read_kbd
) >= 0)
4208 /* Prevent input_pending from remaining set if we quit. */
4209 clear_input_pending ();
4213 /* AlainF 5-Jul-1996
4214 HP-UX 10.10 seems to have problems with signals coming in
4215 Causes "poll: interrupted system call" messages when Emacs is run
4217 Turn periodic alarms back on */
4221 return got_some_input
;
4224 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
4227 read_process_output_call (fun_and_args
)
4228 Lisp_Object fun_and_args
;
4230 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
4234 read_process_output_error_handler (error
)
4237 cmd_error_internal (error
, "error in process filter: ");
4239 update_echo_area ();
4240 Fsleep_for (make_number (2), Qnil
);
4244 /* Read pending output from the process channel,
4245 starting with our buffered-ahead character if we have one.
4246 Yield number of decoded characters read.
4248 This function reads at most 1024 characters.
4249 If you want to read all available subprocess output,
4250 you must call it repeatedly until it returns zero.
4252 The characters read are decoded according to PROC's coding-system
4256 read_process_output (proc
, channel
)
4258 register int channel
;
4260 register int nchars
, nbytes
;
4262 register Lisp_Object outstream
;
4263 register struct buffer
*old
= current_buffer
;
4264 register struct Lisp_Process
*p
= XPROCESS (proc
);
4265 register int opoint
;
4266 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
4267 int carryover
= XINT (p
->decoding_carryover
);
4271 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
4273 vs
= get_vms_process_pointer (p
->pid
);
4277 return (0); /* Really weird if it does this */
4278 if (!(vs
->iosb
[0] & 1))
4279 return -1; /* I/O error */
4282 error ("Could not get VMS process pointer");
4283 chars
= vs
->inputBuffer
;
4284 nbytes
= clean_vms_buffer (chars
, vs
->iosb
[1]);
4287 start_vms_process_read (vs
); /* Crank up the next read on the process */
4288 return 1; /* Nothing worth printing, say we got 1 */
4292 /* The data carried over in the previous decoding (which are at
4293 the tail of decoding buffer) should be prepended to the new
4294 data read to decode all together. */
4295 chars
= (char *) alloca (nbytes
+ carryover
);
4296 bcopy (SDATA (p
->decoding_buf
), buf
, carryover
);
4297 bcopy (vs
->inputBuffer
, chars
+ carryover
, nbytes
);
4301 #ifdef DATAGRAM_SOCKETS
4302 /* A datagram is one packet; allow at least 1500+ bytes of data
4303 corresponding to the typical Ethernet frame size. */
4304 if (DATAGRAM_CHAN_P (channel
))
4306 /* carryover = 0; */ /* Does carryover make sense for datagrams? */
4311 chars
= (char *) alloca (carryover
+ readmax
);
4313 /* See the comment above. */
4314 bcopy (SDATA (p
->decoding_buf
), chars
, carryover
);
4316 #ifdef DATAGRAM_SOCKETS
4317 /* We have a working select, so proc_buffered_char is always -1. */
4318 if (DATAGRAM_CHAN_P (channel
))
4320 int len
= datagram_address
[channel
].len
;
4321 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
- carryover
,
4322 0, datagram_address
[channel
].sa
, &len
);
4326 if (proc_buffered_char
[channel
] < 0)
4327 nbytes
= emacs_read (channel
, chars
+ carryover
, readmax
- carryover
);
4330 chars
[carryover
] = proc_buffered_char
[channel
];
4331 proc_buffered_char
[channel
] = -1;
4332 nbytes
= emacs_read (channel
, chars
+ carryover
+ 1, readmax
- 1 - carryover
);
4336 nbytes
= nbytes
+ 1;
4338 #endif /* not VMS */
4340 XSETINT (p
->decoding_carryover
, 0);
4342 /* At this point, NBYTES holds number of bytes just received
4343 (including the one in proc_buffered_char[channel]). */
4346 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
4348 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
4351 /* Now set NBYTES how many bytes we must decode. */
4352 nbytes
+= carryover
;
4354 /* Read and dispose of the process output. */
4355 outstream
= p
->filter
;
4356 if (!NILP (outstream
))
4358 /* We inhibit quit here instead of just catching it so that
4359 hitting ^G when a filter happens to be running won't screw
4361 int count
= SPECPDL_INDEX ();
4362 Lisp_Object odeactivate
;
4363 Lisp_Object obuffer
, okeymap
;
4365 int outer_running_asynch_code
= running_asynch_code
;
4366 int waiting
= waiting_for_user_input_p
;
4368 /* No need to gcpro these, because all we do with them later
4369 is test them for EQness, and none of them should be a string. */
4370 odeactivate
= Vdeactivate_mark
;
4371 XSETBUFFER (obuffer
, current_buffer
);
4372 okeymap
= current_buffer
->keymap
;
4374 specbind (Qinhibit_quit
, Qt
);
4375 specbind (Qlast_nonmenu_event
, Qt
);
4377 /* In case we get recursively called,
4378 and we already saved the match data nonrecursively,
4379 save the same match data in safely recursive fashion. */
4380 if (outer_running_asynch_code
)
4383 /* Don't clobber the CURRENT match data, either! */
4384 tem
= Fmatch_data (Qnil
, Qnil
);
4385 restore_match_data ();
4386 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
4387 Fset_match_data (tem
);
4390 /* For speed, if a search happens within this code,
4391 save the match data in a special nonrecursive fashion. */
4392 running_asynch_code
= 1;
4394 text
= decode_coding_string (make_unibyte_string (chars
, nbytes
),
4396 if (NILP (buffer_defaults
.enable_multibyte_characters
))
4397 /* We had better return unibyte string. */
4398 text
= string_make_unibyte (text
);
4400 Vlast_coding_system_used
= coding
->symbol
;
4401 /* A new coding system might be found. */
4402 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
4404 p
->decode_coding_system
= coding
->symbol
;
4406 /* Don't call setup_coding_system for
4407 proc_decode_coding_system[channel] here. It is done in
4408 detect_coding called via decode_coding above. */
4410 /* If a coding system for encoding is not yet decided, we set
4411 it as the same as coding-system for decoding.
4413 But, before doing that we must check if
4414 proc_encode_coding_system[p->outfd] surely points to a
4415 valid memory because p->outfd will be changed once EOF is
4416 sent to the process. */
4417 if (NILP (p
->encode_coding_system
)
4418 && proc_encode_coding_system
[XINT (p
->outfd
)])
4420 p
->encode_coding_system
= coding
->symbol
;
4421 setup_coding_system (coding
->symbol
,
4422 proc_encode_coding_system
[XINT (p
->outfd
)]);
4426 carryover
= nbytes
- coding
->consumed
;
4427 bcopy (chars
+ coding
->consumed
, SDATA (p
->decoding_buf
),
4429 XSETINT (p
->decoding_carryover
, carryover
);
4430 nbytes
= SBYTES (text
);
4431 nchars
= SCHARS (text
);
4433 internal_condition_case_1 (read_process_output_call
,
4435 Fcons (proc
, Fcons (text
, Qnil
))),
4436 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
4437 read_process_output_error_handler
);
4439 /* If we saved the match data nonrecursively, restore it now. */
4440 restore_match_data ();
4441 running_asynch_code
= outer_running_asynch_code
;
4443 /* Handling the process output should not deactivate the mark. */
4444 Vdeactivate_mark
= odeactivate
;
4446 /* Restore waiting_for_user_input_p as it was
4447 when we were called, in case the filter clobbered it. */
4448 waiting_for_user_input_p
= waiting
;
4450 #if 0 /* Call record_asynch_buffer_change unconditionally,
4451 because we might have changed minor modes or other things
4452 that affect key bindings. */
4453 if (! EQ (Fcurrent_buffer (), obuffer
)
4454 || ! EQ (current_buffer
->keymap
, okeymap
))
4456 /* But do it only if the caller is actually going to read events.
4457 Otherwise there's no need to make him wake up, and it could
4458 cause trouble (for example it would make Fsit_for return). */
4459 if (waiting_for_user_input_p
== -1)
4460 record_asynch_buffer_change ();
4463 start_vms_process_read (vs
);
4465 unbind_to (count
, Qnil
);
4469 /* If no filter, write into buffer if it isn't dead. */
4470 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
4472 Lisp_Object old_read_only
;
4473 int old_begv
, old_zv
;
4474 int old_begv_byte
, old_zv_byte
;
4475 Lisp_Object odeactivate
;
4476 int before
, before_byte
;
4481 odeactivate
= Vdeactivate_mark
;
4483 Fset_buffer (p
->buffer
);
4485 opoint_byte
= PT_BYTE
;
4486 old_read_only
= current_buffer
->read_only
;
4489 old_begv_byte
= BEGV_BYTE
;
4490 old_zv_byte
= ZV_BYTE
;
4492 current_buffer
->read_only
= Qnil
;
4494 /* Insert new output into buffer
4495 at the current end-of-output marker,
4496 thus preserving logical ordering of input and output. */
4497 if (XMARKER (p
->mark
)->buffer
)
4498 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
4499 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
4502 SET_PT_BOTH (ZV
, ZV_BYTE
);
4504 before_byte
= PT_BYTE
;
4506 /* If the output marker is outside of the visible region, save
4507 the restriction and widen. */
4508 if (! (BEGV
<= PT
&& PT
<= ZV
))
4511 text
= decode_coding_string (make_unibyte_string (chars
, nbytes
),
4513 Vlast_coding_system_used
= coding
->symbol
;
4514 /* A new coding system might be found. See the comment in the
4515 similar code in the previous `if' block. */
4516 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
4518 p
->decode_coding_system
= coding
->symbol
;
4519 if (NILP (p
->encode_coding_system
)
4520 && proc_encode_coding_system
[XINT (p
->outfd
)])
4522 p
->encode_coding_system
= coding
->symbol
;
4523 setup_coding_system (coding
->symbol
,
4524 proc_encode_coding_system
[XINT (p
->outfd
)]);
4527 carryover
= nbytes
- coding
->consumed
;
4528 bcopy (chars
+ coding
->consumed
, SDATA (p
->decoding_buf
),
4530 XSETINT (p
->decoding_carryover
, carryover
);
4531 /* Adjust the multibyteness of TEXT to that of the buffer. */
4532 if (NILP (current_buffer
->enable_multibyte_characters
)
4533 != ! STRING_MULTIBYTE (text
))
4534 text
= (STRING_MULTIBYTE (text
)
4535 ? Fstring_as_unibyte (text
)
4536 : Fstring_as_multibyte (text
));
4537 nbytes
= SBYTES (text
);
4538 nchars
= SCHARS (text
);
4539 /* Insert before markers in case we are inserting where
4540 the buffer's mark is, and the user's next command is Meta-y. */
4541 insert_from_string_before_markers (text
, 0, 0, nchars
, nbytes
, 0);
4543 /* Make sure the process marker's position is valid when the
4544 process buffer is changed in the signal_after_change above.
4545 W3 is known to do that. */
4546 if (BUFFERP (p
->buffer
)
4547 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
4548 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
4550 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
4552 update_mode_lines
++;
4554 /* Make sure opoint and the old restrictions
4555 float ahead of any new text just as point would. */
4556 if (opoint
>= before
)
4558 opoint
+= PT
- before
;
4559 opoint_byte
+= PT_BYTE
- before_byte
;
4561 if (old_begv
> before
)
4563 old_begv
+= PT
- before
;
4564 old_begv_byte
+= PT_BYTE
- before_byte
;
4566 if (old_zv
>= before
)
4568 old_zv
+= PT
- before
;
4569 old_zv_byte
+= PT_BYTE
- before_byte
;
4572 /* If the restriction isn't what it should be, set it. */
4573 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
4574 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
4576 /* Handling the process output should not deactivate the mark. */
4577 Vdeactivate_mark
= odeactivate
;
4579 current_buffer
->read_only
= old_read_only
;
4580 SET_PT_BOTH (opoint
, opoint_byte
);
4581 set_buffer_internal (old
);
4584 start_vms_process_read (vs
);
4589 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
4591 doc
: /* Returns non-nil if emacs is waiting for input from the user.
4592 This is intended for use by asynchronous process output filters and sentinels. */)
4595 return (waiting_for_user_input_p
? Qt
: Qnil
);
4598 /* Sending data to subprocess */
4600 jmp_buf send_process_frame
;
4601 Lisp_Object process_sent_to
;
4604 send_process_trap ()
4610 longjmp (send_process_frame
, 1);
4613 /* Send some data to process PROC.
4614 BUF is the beginning of the data; LEN is the number of characters.
4615 OBJECT is the Lisp object that the data comes from. If OBJECT is
4616 nil or t, it means that the data comes from C string.
4618 If OBJECT is not nil, the data is encoded by PROC's coding-system
4619 for encoding before it is sent.
4621 This function can evaluate Lisp code and can garbage collect. */
4624 send_process (proc
, buf
, len
, object
)
4625 volatile Lisp_Object proc
;
4626 unsigned char *volatile buf
;
4628 volatile Lisp_Object object
;
4630 /* Use volatile to protect variables from being clobbered by longjmp. */
4632 struct coding_system
*coding
;
4633 struct gcpro gcpro1
;
4638 struct Lisp_Process
*p
= XPROCESS (proc
);
4639 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
4642 if (! NILP (XPROCESS (proc
)->raw_status_low
))
4643 update_status (XPROCESS (proc
));
4644 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
4645 error ("Process %s not running",
4646 SDATA (XPROCESS (proc
)->name
));
4647 if (XINT (XPROCESS (proc
)->outfd
) < 0)
4648 error ("Output file descriptor of %s is closed",
4649 SDATA (XPROCESS (proc
)->name
));
4651 coding
= proc_encode_coding_system
[XINT (XPROCESS (proc
)->outfd
)];
4652 Vlast_coding_system_used
= coding
->symbol
;
4654 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
4655 || (BUFFERP (object
)
4656 && !NILP (XBUFFER (object
)->enable_multibyte_characters
))
4659 if (!EQ (coding
->symbol
, XPROCESS (proc
)->encode_coding_system
))
4660 /* The coding system for encoding was changed to raw-text
4661 because we sent a unibyte text previously. Now we are
4662 sending a multibyte text, thus we must encode it by the
4663 original coding system specified for the current
4665 setup_coding_system (XPROCESS (proc
)->encode_coding_system
, coding
);
4666 /* src_multibyte should be set to 1 _after_ a call to
4667 setup_coding_system, since it resets src_multibyte to
4669 coding
->src_multibyte
= 1;
4673 /* For sending a unibyte text, character code conversion should
4674 not take place but EOL conversion should. So, setup raw-text
4675 or one of the subsidiary if we have not yet done it. */
4676 if (coding
->type
!= coding_type_raw_text
)
4678 if (CODING_REQUIRE_FLUSHING (coding
))
4680 /* But, before changing the coding, we must flush out data. */
4681 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
4682 send_process (proc
, "", 0, Qt
);
4684 coding
->src_multibyte
= 0;
4685 setup_raw_text_coding_system (coding
);
4688 coding
->dst_multibyte
= 0;
4690 if (CODING_REQUIRE_ENCODING (coding
))
4692 int require
= encoding_buffer_size (coding
, len
);
4693 int from_byte
= -1, from
= -1, to
= -1;
4694 unsigned char *temp_buf
= NULL
;
4696 if (BUFFERP (object
))
4698 from_byte
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
4699 from
= buf_bytepos_to_charpos (XBUFFER (object
), from_byte
);
4700 to
= buf_bytepos_to_charpos (XBUFFER (object
), from_byte
+ len
);
4702 else if (STRINGP (object
))
4704 from_byte
= buf
- SDATA (object
);
4705 from
= string_byte_to_char (object
, from_byte
);
4706 to
= string_byte_to_char (object
, from_byte
+ len
);
4709 if (coding
->composing
!= COMPOSITION_DISABLED
)
4712 coding_save_composition (coding
, from
, to
, object
);
4714 coding
->composing
= COMPOSITION_DISABLED
;
4717 if (SBYTES (XPROCESS (proc
)->encoding_buf
) < require
)
4718 XPROCESS (proc
)->encoding_buf
= make_uninit_string (require
);
4721 buf
= (BUFFERP (object
)
4722 ? BUF_BYTE_ADDRESS (XBUFFER (object
), from_byte
)
4723 : SDATA (object
) + from_byte
);
4725 object
= XPROCESS (proc
)->encoding_buf
;
4726 encode_coding (coding
, (char *) buf
, SDATA (object
),
4727 len
, SBYTES (object
));
4728 len
= coding
->produced
;
4729 buf
= SDATA (object
);
4735 vs
= get_vms_process_pointer (p
->pid
);
4737 error ("Could not find this process: %x", p
->pid
);
4738 else if (write_to_vms_process (vs
, buf
, len
))
4742 if (pty_max_bytes
== 0)
4744 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
4745 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
4747 if (pty_max_bytes
< 0)
4748 pty_max_bytes
= 250;
4750 pty_max_bytes
= 250;
4752 /* Deduct one, to leave space for the eof. */
4756 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
4757 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
4758 when returning with longjmp despite being declared volatile. */
4759 if (!setjmp (send_process_frame
))
4761 process_sent_to
= proc
;
4765 SIGTYPE (*old_sigpipe
)();
4767 /* Decide how much data we can send in one batch.
4768 Long lines need to be split into multiple batches. */
4769 if (!NILP (XPROCESS (proc
)->pty_flag
))
4771 /* Starting this at zero is always correct when not the first
4772 iteration because the previous iteration ended by sending C-d.
4773 It may not be correct for the first iteration
4774 if a partial line was sent in a separate send_process call.
4775 If that proves worth handling, we need to save linepos
4776 in the process object. */
4778 unsigned char *ptr
= (unsigned char *) buf
;
4779 unsigned char *end
= (unsigned char *) buf
+ len
;
4781 /* Scan through this text for a line that is too long. */
4782 while (ptr
!= end
&& linepos
< pty_max_bytes
)
4790 /* If we found one, break the line there
4791 and put in a C-d to force the buffer through. */
4795 /* Send this batch, using one or more write calls. */
4798 int outfd
= XINT (XPROCESS (proc
)->outfd
);
4799 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
4800 #ifdef DATAGRAM_SOCKETS
4801 if (DATAGRAM_CHAN_P (outfd
))
4803 rv
= sendto (outfd
, (char *) buf
, this,
4804 0, datagram_address
[outfd
].sa
,
4805 datagram_address
[outfd
].len
);
4806 if (rv
< 0 && errno
== EMSGSIZE
)
4807 report_file_error ("sending datagram", Fcons (proc
, Qnil
));
4811 rv
= emacs_write (outfd
, (char *) buf
, this);
4812 signal (SIGPIPE
, old_sigpipe
);
4818 || errno
== EWOULDBLOCK
4824 /* Buffer is full. Wait, accepting input;
4825 that may allow the program
4826 to finish doing output and read more. */
4831 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
4832 /* A gross hack to work around a bug in FreeBSD.
4833 In the following sequence, read(2) returns
4837 write(2) 954 bytes, get EAGAIN
4838 read(2) 1024 bytes in process_read_output
4839 read(2) 11 bytes in process_read_output
4841 That is, read(2) returns more bytes than have
4842 ever been written successfully. The 1033 bytes
4843 read are the 1022 bytes written successfully
4844 after processing (for example with CRs added if
4845 the terminal is set up that way which it is
4846 here). The same bytes will be seen again in a
4847 later read(2), without the CRs. */
4849 if (errno
== EAGAIN
)
4852 ioctl (XINT (XPROCESS (proc
)->outfd
), TIOCFLUSH
,
4855 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
4857 /* Running filters might relocate buffers or strings.
4858 Arrange to relocate BUF. */
4859 if (BUFFERP (object
))
4860 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
4861 else if (STRINGP (object
))
4862 offset
= buf
- SDATA (object
);
4864 XSETFASTINT (zero
, 0);
4865 #ifdef EMACS_HAS_USECS
4866 wait_reading_process_input (0, 20000, zero
, 0);
4868 wait_reading_process_input (1, 0, zero
, 0);
4871 if (BUFFERP (object
))
4872 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
4873 else if (STRINGP (object
))
4874 buf
= offset
+ SDATA (object
);
4879 /* This is a real error. */
4880 report_file_error ("writing to process", Fcons (proc
, Qnil
));
4887 /* If we sent just part of the string, put in an EOF
4888 to force it through, before we send the rest. */
4890 Fprocess_send_eof (proc
);
4893 #endif /* not VMS */
4897 proc
= process_sent_to
;
4899 XPROCESS (proc
)->raw_status_low
= Qnil
;
4900 XPROCESS (proc
)->raw_status_high
= Qnil
;
4901 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
4902 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
4903 deactivate_process (proc
);
4905 error ("Error writing to process %s; closed it",
4906 SDATA (XPROCESS (proc
)->name
));
4908 error ("SIGPIPE raised on process %s; closed it",
4909 SDATA (XPROCESS (proc
)->name
));
4916 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
4918 doc
: /* Send current contents of region as input to PROCESS.
4919 PROCESS may be a process, a buffer, the name of a process or buffer, or
4920 nil, indicating the current buffer's process.
4921 Called from program, takes three arguments, PROCESS, START and END.
4922 If the region is more than 500 characters long,
4923 it is sent in several bunches. This may happen even for shorter regions.
4924 Output from processes can arrive in between bunches. */)
4925 (process
, start
, end
)
4926 Lisp_Object process
, start
, end
;
4931 proc
= get_process (process
);
4932 validate_region (&start
, &end
);
4934 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
4935 move_gap (XINT (start
));
4937 start1
= CHAR_TO_BYTE (XINT (start
));
4938 end1
= CHAR_TO_BYTE (XINT (end
));
4939 send_process (proc
, BYTE_POS_ADDR (start1
), end1
- start1
,
4940 Fcurrent_buffer ());
4945 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
4947 doc
: /* Send PROCESS the contents of STRING as input.
4948 PROCESS may be a process, a buffer, the name of a process or buffer, or
4949 nil, indicating the current buffer's process.
4950 If STRING is more than 500 characters long,
4951 it is sent in several bunches. This may happen even for shorter strings.
4952 Output from processes can arrive in between bunches. */)
4954 Lisp_Object process
, string
;
4957 CHECK_STRING (string
);
4958 proc
= get_process (process
);
4959 send_process (proc
, SDATA (string
),
4960 SBYTES (string
), string
);
4964 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
4965 Sprocess_running_child_p
, 0, 1, 0,
4966 doc
: /* Return t if PROCESS has given the terminal to a child.
4967 If the operating system does not make it possible to find out,
4968 return t unconditionally. */)
4970 Lisp_Object process
;
4972 /* Initialize in case ioctl doesn't exist or gives an error,
4973 in a way that will cause returning t. */
4976 struct Lisp_Process
*p
;
4978 proc
= get_process (process
);
4979 p
= XPROCESS (proc
);
4981 if (!EQ (p
->childp
, Qt
))
4982 error ("Process %s is not a subprocess",
4984 if (XINT (p
->infd
) < 0)
4985 error ("Process %s is not active",
4989 if (!NILP (p
->subtty
))
4990 ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
4992 ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
4993 #endif /* defined (TIOCGPGRP ) */
4995 if (gid
== XFASTINT (p
->pid
))
5000 /* send a signal number SIGNO to PROCESS.
5001 If CURRENT_GROUP is t, that means send to the process group
5002 that currently owns the terminal being used to communicate with PROCESS.
5003 This is used for various commands in shell mode.
5004 If CURRENT_GROUP is lambda, that means send to the process group
5005 that currently owns the terminal, but only if it is NOT the shell itself.
5007 If NOMSG is zero, insert signal-announcements into process's buffers
5010 If we can, we try to signal PROCESS by sending control characters
5011 down the pty. This allows us to signal inferiors who have changed
5012 their uid, for which killpg would return an EPERM error. */
5015 process_send_signal (process
, signo
, current_group
, nomsg
)
5016 Lisp_Object process
;
5018 Lisp_Object current_group
;
5022 register struct Lisp_Process
*p
;
5026 proc
= get_process (process
);
5027 p
= XPROCESS (proc
);
5029 if (!EQ (p
->childp
, Qt
))
5030 error ("Process %s is not a subprocess",
5032 if (XINT (p
->infd
) < 0)
5033 error ("Process %s is not active",
5036 if (NILP (p
->pty_flag
))
5037 current_group
= Qnil
;
5039 /* If we are using pgrps, get a pgrp number and make it negative. */
5040 if (NILP (current_group
))
5041 /* Send the signal to the shell's process group. */
5042 gid
= XFASTINT (p
->pid
);
5045 #ifdef SIGNALS_VIA_CHARACTERS
5046 /* If possible, send signals to the entire pgrp
5047 by sending an input character to it. */
5049 /* TERMIOS is the latest and bestest, and seems most likely to
5050 work. If the system has it, use it. */
5057 tcgetattr (XINT (p
->infd
), &t
);
5058 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
5062 tcgetattr (XINT (p
->infd
), &t
);
5063 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
5067 tcgetattr (XINT (p
->infd
), &t
);
5068 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5069 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
5071 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
5076 #else /* ! HAVE_TERMIOS */
5078 /* On Berkeley descendants, the following IOCTL's retrieve the
5079 current control characters. */
5080 #if defined (TIOCGLTC) && defined (TIOCGETC)
5088 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
5089 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
5092 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
5093 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
5097 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
5098 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
5100 #endif /* ! defined (SIGTSTP) */
5103 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
5105 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
5112 ioctl (XINT (p
->infd
), TCGETA
, &t
);
5113 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
5116 ioctl (XINT (p
->infd
), TCGETA
, &t
);
5117 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
5121 ioctl (XINT (p
->infd
), TCGETA
, &t
);
5122 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
5124 #endif /* ! defined (SIGTSTP) */
5126 #else /* ! defined (TCGETA) */
5127 Your configuration files are messed up
.
5128 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
5129 you'd better be using one of the alternatives above! */
5130 #endif /* ! defined (TCGETA) */
5131 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
5132 #endif /* ! defined HAVE_TERMIOS */
5134 /* The code above always returns from the function. */
5135 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5138 /* Get the current pgrp using the tty itself, if we have that.
5139 Otherwise, use the pty to get the pgrp.
5140 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5141 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5142 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5143 His patch indicates that if TIOCGPGRP returns an error, then
5144 we should just assume that p->pid is also the process group id. */
5148 if (!NILP (p
->subtty
))
5149 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
5151 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
5154 /* If we can't get the information, assume
5155 the shell owns the tty. */
5156 gid
= XFASTINT (p
->pid
);
5159 /* It is not clear whether anything really can set GID to -1.
5160 Perhaps on some system one of those ioctls can or could do so.
5161 Or perhaps this is vestigial. */
5164 #else /* ! defined (TIOCGPGRP ) */
5165 /* Can't select pgrps on this system, so we know that
5166 the child itself heads the pgrp. */
5167 gid
= XFASTINT (p
->pid
);
5168 #endif /* ! defined (TIOCGPGRP ) */
5170 /* If current_group is lambda, and the shell owns the terminal,
5171 don't send any signal. */
5172 if (EQ (current_group
, Qlambda
) && gid
== XFASTINT (p
->pid
))
5180 p
->raw_status_low
= Qnil
;
5181 p
->raw_status_high
= Qnil
;
5183 XSETINT (p
->tick
, ++process_tick
);
5187 #endif /* ! defined (SIGCONT) */
5190 send_process (proc
, "\003", 1, Qnil
); /* ^C */
5195 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
5200 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
5203 flush_pending_output (XINT (p
->infd
));
5207 /* If we don't have process groups, send the signal to the immediate
5208 subprocess. That isn't really right, but it's better than any
5209 obvious alternative. */
5212 kill (XFASTINT (p
->pid
), signo
);
5216 /* gid may be a pid, or minus a pgrp's number */
5218 if (!NILP (current_group
))
5219 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
5222 gid
= - XFASTINT (p
->pid
);
5225 #else /* ! defined (TIOCSIGSEND) */
5226 EMACS_KILLPG (gid
, signo
);
5227 #endif /* ! defined (TIOCSIGSEND) */
5230 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
5231 doc
: /* Interrupt process PROCESS.
5232 PROCESS may be a process, a buffer, or the name of a process or buffer.
5233 nil or no arg means current buffer's process.
5234 Second arg CURRENT-GROUP non-nil means send signal to
5235 the current process-group of the process's controlling terminal
5236 rather than to the process's own process group.
5237 If the process is a shell, this means interrupt current subjob
5238 rather than the shell.
5240 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
5241 don't send the signal. */)
5242 (process
, current_group
)
5243 Lisp_Object process
, current_group
;
5245 process_send_signal (process
, SIGINT
, current_group
, 0);
5249 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
5250 doc
: /* Kill process PROCESS. May be process or name of one.
5251 See function `interrupt-process' for more details on usage. */)
5252 (process
, current_group
)
5253 Lisp_Object process
, current_group
;
5255 process_send_signal (process
, SIGKILL
, current_group
, 0);
5259 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
5260 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
5261 See function `interrupt-process' for more details on usage. */)
5262 (process
, current_group
)
5263 Lisp_Object process
, current_group
;
5265 process_send_signal (process
, SIGQUIT
, current_group
, 0);
5269 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
5270 doc
: /* Stop process PROCESS. May be process or name of one.
5271 See function `interrupt-process' for more details on usage.
5272 If PROCESS is a network process, inhibit handling of incoming traffic. */)
5273 (process
, current_group
)
5274 Lisp_Object process
, current_group
;
5277 if (PROCESSP (process
) && NETCONN_P (process
))
5279 struct Lisp_Process
*p
;
5281 p
= XPROCESS (process
);
5282 if (NILP (p
->command
)
5283 && XINT (p
->infd
) >= 0)
5285 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
5286 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
5293 error ("no SIGTSTP support");
5295 process_send_signal (process
, SIGTSTP
, current_group
, 0);
5300 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
5301 doc
: /* Continue process PROCESS. May be process or name of one.
5302 See function `interrupt-process' for more details on usage.
5303 If PROCESS is a network process, resume handling of incoming traffic. */)
5304 (process
, current_group
)
5305 Lisp_Object process
, current_group
;
5308 if (PROCESSP (process
) && NETCONN_P (process
))
5310 struct Lisp_Process
*p
;
5312 p
= XPROCESS (process
);
5313 if (EQ (p
->command
, Qt
)
5314 && XINT (p
->infd
) >= 0
5315 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
5317 FD_SET (XINT (p
->infd
), &input_wait_mask
);
5318 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
5325 process_send_signal (process
, SIGCONT
, current_group
, 0);
5327 error ("no SIGCONT support");
5332 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
5333 2, 2, "nProcess number: \nnSignal code: ",
5334 doc
: /* Send the process with process id PID the signal with code SIGCODE.
5335 PID must be an integer. The process need not be a child of this Emacs.
5336 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
5338 Lisp_Object pid
, sigcode
;
5342 #define handle_signal(NAME, VALUE) \
5343 else if (!strcmp (name, NAME)) \
5344 XSETINT (sigcode, VALUE)
5346 if (INTEGERP (sigcode
))
5350 unsigned char *name
;
5352 CHECK_SYMBOL (sigcode
);
5353 name
= SDATA (SYMBOL_NAME (sigcode
));
5358 handle_signal ("SIGHUP", SIGHUP
);
5361 handle_signal ("SIGINT", SIGINT
);
5364 handle_signal ("SIGQUIT", SIGQUIT
);
5367 handle_signal ("SIGILL", SIGILL
);
5370 handle_signal ("SIGABRT", SIGABRT
);
5373 handle_signal ("SIGEMT", SIGEMT
);
5376 handle_signal ("SIGKILL", SIGKILL
);
5379 handle_signal ("SIGFPE", SIGFPE
);
5382 handle_signal ("SIGBUS", SIGBUS
);
5385 handle_signal ("SIGSEGV", SIGSEGV
);
5388 handle_signal ("SIGSYS", SIGSYS
);
5391 handle_signal ("SIGPIPE", SIGPIPE
);
5394 handle_signal ("SIGALRM", SIGALRM
);
5397 handle_signal ("SIGTERM", SIGTERM
);
5400 handle_signal ("SIGURG", SIGURG
);
5403 handle_signal ("SIGSTOP", SIGSTOP
);
5406 handle_signal ("SIGTSTP", SIGTSTP
);
5409 handle_signal ("SIGCONT", SIGCONT
);
5412 handle_signal ("SIGCHLD", SIGCHLD
);
5415 handle_signal ("SIGTTIN", SIGTTIN
);
5418 handle_signal ("SIGTTOU", SIGTTOU
);
5421 handle_signal ("SIGIO", SIGIO
);
5424 handle_signal ("SIGXCPU", SIGXCPU
);
5427 handle_signal ("SIGXFSZ", SIGXFSZ
);
5430 handle_signal ("SIGVTALRM", SIGVTALRM
);
5433 handle_signal ("SIGPROF", SIGPROF
);
5436 handle_signal ("SIGWINCH", SIGWINCH
);
5439 handle_signal ("SIGINFO", SIGINFO
);
5442 handle_signal ("SIGUSR1", SIGUSR1
);
5445 handle_signal ("SIGUSR2", SIGUSR2
);
5448 error ("Undefined signal name %s", name
);
5451 #undef handle_signal
5453 return make_number (kill (XINT (pid
), XINT (sigcode
)));
5456 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
5457 doc
: /* Make PROCESS see end-of-file in its input.
5458 EOF comes after any text already sent to it.
5459 PROCESS may be a process, a buffer, the name of a process or buffer, or
5460 nil, indicating the current buffer's process.
5461 If PROCESS is a network connection, or is a process communicating
5462 through a pipe (as opposed to a pty), then you cannot send any more
5463 text to PROCESS after you call this function. */)
5465 Lisp_Object process
;
5468 struct coding_system
*coding
;
5470 if (DATAGRAM_CONN_P (process
))
5473 proc
= get_process (process
);
5474 coding
= proc_encode_coding_system
[XINT (XPROCESS (proc
)->outfd
)];
5476 /* Make sure the process is really alive. */
5477 if (! NILP (XPROCESS (proc
)->raw_status_low
))
5478 update_status (XPROCESS (proc
));
5479 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
5480 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
5482 if (CODING_REQUIRE_FLUSHING (coding
))
5484 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5485 send_process (proc
, "", 0, Qnil
);
5489 send_process (proc
, "\032", 1, Qnil
); /* ^z */
5491 if (!NILP (XPROCESS (proc
)->pty_flag
))
5492 send_process (proc
, "\004", 1, Qnil
);
5495 int old_outfd
, new_outfd
;
5497 #ifdef HAVE_SHUTDOWN
5498 /* If this is a network connection, or socketpair is used
5499 for communication with the subprocess, call shutdown to cause EOF.
5500 (In some old system, shutdown to socketpair doesn't work.
5501 Then we just can't win.) */
5502 if (NILP (XPROCESS (proc
)->pid
)
5503 || XINT (XPROCESS (proc
)->outfd
) == XINT (XPROCESS (proc
)->infd
))
5504 shutdown (XINT (XPROCESS (proc
)->outfd
), 1);
5505 /* In case of socketpair, outfd == infd, so don't close it. */
5506 if (XINT (XPROCESS (proc
)->outfd
) != XINT (XPROCESS (proc
)->infd
))
5507 emacs_close (XINT (XPROCESS (proc
)->outfd
));
5508 #else /* not HAVE_SHUTDOWN */
5509 emacs_close (XINT (XPROCESS (proc
)->outfd
));
5510 #endif /* not HAVE_SHUTDOWN */
5511 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
5512 old_outfd
= XINT (XPROCESS (proc
)->outfd
);
5514 if (!proc_encode_coding_system
[new_outfd
])
5515 proc_encode_coding_system
[new_outfd
]
5516 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
5517 bcopy (proc_encode_coding_system
[old_outfd
],
5518 proc_encode_coding_system
[new_outfd
],
5519 sizeof (struct coding_system
));
5520 bzero (proc_encode_coding_system
[old_outfd
],
5521 sizeof (struct coding_system
));
5523 XSETINT (XPROCESS (proc
)->outfd
, new_outfd
);
5529 /* Kill all processes associated with `buffer'.
5530 If `buffer' is nil, kill all processes */
5533 kill_buffer_processes (buffer
)
5536 Lisp_Object tail
, proc
;
5538 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
5540 proc
= XCDR (XCAR (tail
));
5541 if (GC_PROCESSP (proc
)
5542 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
5544 if (NETCONN_P (proc
))
5545 Fdelete_process (proc
);
5546 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
5547 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
5552 /* On receipt of a signal that a child status has changed, loop asking
5553 about children with changed statuses until the system says there
5556 All we do is change the status; we do not run sentinels or print
5557 notifications. That is saved for the next time keyboard input is
5558 done, in order to avoid timing errors.
5560 ** WARNING: this can be called during garbage collection.
5561 Therefore, it must not be fooled by the presence of mark bits in
5564 ** USG WARNING: Although it is not obvious from the documentation
5565 in signal(2), on a USG system the SIGCLD handler MUST NOT call
5566 signal() before executing at least one wait(), otherwise the
5567 handler will be called again, resulting in an infinite loop. The
5568 relevant portion of the documentation reads "SIGCLD signals will be
5569 queued and the signal-catching function will be continually
5570 reentered until the queue is empty". Invoking signal() causes the
5571 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
5575 sigchld_handler (signo
)
5578 int old_errno
= errno
;
5580 register struct Lisp_Process
*p
;
5581 extern EMACS_TIME
*input_available_clear_time
;
5585 sigheld
|= sigbit (SIGCHLD
);
5597 #endif /* no WUNTRACED */
5598 /* Keep trying to get a status until we get a definitive result. */
5602 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
5604 while (pid
< 0 && errno
== EINTR
);
5608 /* PID == 0 means no processes found, PID == -1 means a real
5609 failure. We have done all our job, so return. */
5611 /* USG systems forget handlers when they are used;
5612 must reestablish each time */
5613 #if defined (USG) && !defined (POSIX_SIGNALS)
5614 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
5617 sigheld
&= ~sigbit (SIGCHLD
);
5625 #endif /* no WNOHANG */
5627 /* Find the process that signaled us, and record its status. */
5630 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
5632 proc
= XCDR (XCAR (tail
));
5633 p
= XPROCESS (proc
);
5634 if (GC_EQ (p
->childp
, Qt
) && XINT (p
->pid
) == pid
)
5639 /* Look for an asynchronous process whose pid hasn't been filled
5642 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
5644 proc
= XCDR (XCAR (tail
));
5645 p
= XPROCESS (proc
);
5646 if (GC_INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
5651 /* Change the status of the process that was found. */
5654 union { int i
; WAITTYPE wt
; } u
;
5655 int clear_desc_flag
= 0;
5657 XSETINT (p
->tick
, ++process_tick
);
5659 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
5660 XSETINT (p
->raw_status_high
, u
.i
>> 16);
5662 /* If process has terminated, stop waiting for its output. */
5663 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
5664 && XINT (p
->infd
) >= 0)
5665 clear_desc_flag
= 1;
5667 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
5668 if (clear_desc_flag
)
5670 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
5671 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
5674 /* Tell wait_reading_process_input that it needs to wake up and
5676 if (input_available_clear_time
)
5677 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
5680 /* There was no asynchronous process found for that id. Check
5681 if we have a synchronous process. */
5684 synch_process_alive
= 0;
5686 /* Report the status of the synchronous process. */
5688 synch_process_retcode
= WRETCODE (w
);
5689 else if (WIFSIGNALED (w
))
5691 int code
= WTERMSIG (w
);
5694 synchronize_system_messages_locale ();
5695 signame
= strsignal (code
);
5698 signame
= "unknown";
5700 synch_process_death
= signame
;
5703 /* Tell wait_reading_process_input that it needs to wake up and
5705 if (input_available_clear_time
)
5706 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
5709 /* On some systems, we must return right away.
5710 If any more processes want to signal us, we will
5712 Otherwise (on systems that have WNOHANG), loop around
5713 to use up all the processes that have something to tell us. */
5714 #if (defined WINDOWSNT \
5715 || (defined USG && !defined GNU_LINUX \
5716 && !(defined HPUX && defined WNOHANG)))
5717 #if defined (USG) && ! defined (POSIX_SIGNALS)
5718 signal (signo
, sigchld_handler
);
5722 #endif /* USG, but not HPUX with WNOHANG */
5728 exec_sentinel_unwind (data
)
5731 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
5736 exec_sentinel_error_handler (error
)
5739 cmd_error_internal (error
, "error in process sentinel: ");
5741 update_echo_area ();
5742 Fsleep_for (make_number (2), Qnil
);
5747 exec_sentinel (proc
, reason
)
5748 Lisp_Object proc
, reason
;
5750 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
5751 register struct Lisp_Process
*p
= XPROCESS (proc
);
5752 int count
= SPECPDL_INDEX ();
5753 int outer_running_asynch_code
= running_asynch_code
;
5754 int waiting
= waiting_for_user_input_p
;
5756 /* No need to gcpro these, because all we do with them later
5757 is test them for EQness, and none of them should be a string. */
5758 odeactivate
= Vdeactivate_mark
;
5759 XSETBUFFER (obuffer
, current_buffer
);
5760 okeymap
= current_buffer
->keymap
;
5762 sentinel
= p
->sentinel
;
5763 if (NILP (sentinel
))
5766 /* Zilch the sentinel while it's running, to avoid recursive invocations;
5767 assure that it gets restored no matter how the sentinel exits. */
5769 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
5770 /* Inhibit quit so that random quits don't screw up a running filter. */
5771 specbind (Qinhibit_quit
, Qt
);
5772 specbind (Qlast_nonmenu_event
, Qt
);
5774 /* In case we get recursively called,
5775 and we already saved the match data nonrecursively,
5776 save the same match data in safely recursive fashion. */
5777 if (outer_running_asynch_code
)
5780 tem
= Fmatch_data (Qnil
, Qnil
);
5781 restore_match_data ();
5782 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
5783 Fset_match_data (tem
);
5786 /* For speed, if a search happens within this code,
5787 save the match data in a special nonrecursive fashion. */
5788 running_asynch_code
= 1;
5790 internal_condition_case_1 (read_process_output_call
,
5792 Fcons (proc
, Fcons (reason
, Qnil
))),
5793 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5794 exec_sentinel_error_handler
);
5796 /* If we saved the match data nonrecursively, restore it now. */
5797 restore_match_data ();
5798 running_asynch_code
= outer_running_asynch_code
;
5800 Vdeactivate_mark
= odeactivate
;
5802 /* Restore waiting_for_user_input_p as it was
5803 when we were called, in case the filter clobbered it. */
5804 waiting_for_user_input_p
= waiting
;
5807 if (! EQ (Fcurrent_buffer (), obuffer
)
5808 || ! EQ (current_buffer
->keymap
, okeymap
))
5810 /* But do it only if the caller is actually going to read events.
5811 Otherwise there's no need to make him wake up, and it could
5812 cause trouble (for example it would make Fsit_for return). */
5813 if (waiting_for_user_input_p
== -1)
5814 record_asynch_buffer_change ();
5816 unbind_to (count
, Qnil
);
5819 /* Report all recent events of a change in process status
5820 (either run the sentinel or output a message).
5821 This is usually done while Emacs is waiting for keyboard input
5822 but can be done at other times. */
5827 register Lisp_Object proc
, buffer
;
5828 Lisp_Object tail
, msg
;
5829 struct gcpro gcpro1
, gcpro2
;
5833 /* We need to gcpro tail; if read_process_output calls a filter
5834 which deletes a process and removes the cons to which tail points
5835 from Vprocess_alist, and then causes a GC, tail is an unprotected
5839 /* Set this now, so that if new processes are created by sentinels
5840 that we run, we get called again to handle their status changes. */
5841 update_tick
= process_tick
;
5843 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
5846 register struct Lisp_Process
*p
;
5848 proc
= Fcdr (Fcar (tail
));
5849 p
= XPROCESS (proc
);
5851 if (XINT (p
->tick
) != XINT (p
->update_tick
))
5853 XSETINT (p
->update_tick
, XINT (p
->tick
));
5855 /* If process is still active, read any output that remains. */
5856 while (! EQ (p
->filter
, Qt
)
5857 && ! EQ (p
->status
, Qconnect
)
5858 && ! EQ (p
->status
, Qlisten
)
5859 && ! EQ (p
->command
, Qt
) /* Network process not stopped. */
5860 && XINT (p
->infd
) >= 0
5861 && read_process_output (proc
, XINT (p
->infd
)) > 0);
5865 /* Get the text to use for the message. */
5866 if (!NILP (p
->raw_status_low
))
5868 msg
= status_message (p
->status
);
5870 /* If process is terminated, deactivate it or delete it. */
5872 if (CONSP (p
->status
))
5873 symbol
= XCAR (p
->status
);
5875 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
5876 || EQ (symbol
, Qclosed
))
5878 if (delete_exited_processes
)
5879 remove_process (proc
);
5881 deactivate_process (proc
);
5884 /* The actions above may have further incremented p->tick.
5885 So set p->update_tick again
5886 so that an error in the sentinel will not cause
5887 this code to be run again. */
5888 XSETINT (p
->update_tick
, XINT (p
->tick
));
5889 /* Now output the message suitably. */
5890 if (!NILP (p
->sentinel
))
5891 exec_sentinel (proc
, msg
);
5892 /* Don't bother with a message in the buffer
5893 when a process becomes runnable. */
5894 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
5896 Lisp_Object ro
, tem
;
5897 struct buffer
*old
= current_buffer
;
5898 int opoint
, opoint_byte
;
5899 int before
, before_byte
;
5901 ro
= XBUFFER (buffer
)->read_only
;
5903 /* Avoid error if buffer is deleted
5904 (probably that's why the process is dead, too) */
5905 if (NILP (XBUFFER (buffer
)->name
))
5907 Fset_buffer (buffer
);
5910 opoint_byte
= PT_BYTE
;
5911 /* Insert new output into buffer
5912 at the current end-of-output marker,
5913 thus preserving logical ordering of input and output. */
5914 if (XMARKER (p
->mark
)->buffer
)
5915 Fgoto_char (p
->mark
);
5917 SET_PT_BOTH (ZV
, ZV_BYTE
);
5920 before_byte
= PT_BYTE
;
5922 tem
= current_buffer
->read_only
;
5923 current_buffer
->read_only
= Qnil
;
5924 insert_string ("\nProcess ");
5925 Finsert (1, &p
->name
);
5926 insert_string (" ");
5928 current_buffer
->read_only
= tem
;
5929 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5931 if (opoint
>= before
)
5932 SET_PT_BOTH (opoint
+ (PT
- before
),
5933 opoint_byte
+ (PT_BYTE
- before_byte
));
5935 SET_PT_BOTH (opoint
, opoint_byte
);
5937 set_buffer_internal (old
);
5942 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
5943 redisplay_preserve_echo_area (13);
5949 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
5950 Sset_process_coding_system
, 1, 3, 0,
5951 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
5952 DECODING will be used to decode subprocess output and ENCODING to
5953 encode subprocess input. */)
5954 (proc
, decoding
, encoding
)
5955 register Lisp_Object proc
, decoding
, encoding
;
5957 register struct Lisp_Process
*p
;
5959 CHECK_PROCESS (proc
);
5960 p
= XPROCESS (proc
);
5961 if (XINT (p
->infd
) < 0)
5962 error ("Input file descriptor of %s closed", SDATA (p
->name
));
5963 if (XINT (p
->outfd
) < 0)
5964 error ("Output file descriptor of %s closed", SDATA (p
->name
));
5966 p
->decode_coding_system
= Fcheck_coding_system (decoding
);
5967 p
->encode_coding_system
= Fcheck_coding_system (encoding
);
5968 setup_coding_system (decoding
,
5969 proc_decode_coding_system
[XINT (p
->infd
)]);
5970 setup_coding_system (encoding
,
5971 proc_encode_coding_system
[XINT (p
->outfd
)]);
5976 DEFUN ("process-coding-system",
5977 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
5978 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
5980 register Lisp_Object proc
;
5982 CHECK_PROCESS (proc
);
5983 return Fcons (XPROCESS (proc
)->decode_coding_system
,
5984 XPROCESS (proc
)->encode_coding_system
);
5987 /* The first time this is called, assume keyboard input comes from DESC
5988 instead of from where we used to expect it.
5989 Subsequent calls mean assume input keyboard can come from DESC
5990 in addition to other places. */
5992 static int add_keyboard_wait_descriptor_called_flag
;
5995 add_keyboard_wait_descriptor (desc
)
5998 if (! add_keyboard_wait_descriptor_called_flag
)
5999 FD_CLR (0, &input_wait_mask
);
6000 add_keyboard_wait_descriptor_called_flag
= 1;
6001 FD_SET (desc
, &input_wait_mask
);
6002 FD_SET (desc
, &non_process_wait_mask
);
6003 if (desc
> max_keyboard_desc
)
6004 max_keyboard_desc
= desc
;
6007 /* From now on, do not expect DESC to give keyboard input. */
6010 delete_keyboard_wait_descriptor (desc
)
6014 int lim
= max_keyboard_desc
;
6016 FD_CLR (desc
, &input_wait_mask
);
6017 FD_CLR (desc
, &non_process_wait_mask
);
6019 if (desc
== max_keyboard_desc
)
6020 for (fd
= 0; fd
< lim
; fd
++)
6021 if (FD_ISSET (fd
, &input_wait_mask
)
6022 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6023 max_keyboard_desc
= fd
;
6026 /* Return nonzero if *MASK has a bit set
6027 that corresponds to one of the keyboard input descriptors. */
6030 keyboard_bit_set (mask
)
6035 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
6036 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6037 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6050 if (! noninteractive
|| initialized
)
6052 signal (SIGCHLD
, sigchld_handler
);
6055 FD_ZERO (&input_wait_mask
);
6056 FD_ZERO (&non_keyboard_wait_mask
);
6057 FD_ZERO (&non_process_wait_mask
);
6058 max_process_desc
= 0;
6060 FD_SET (0, &input_wait_mask
);
6062 Vprocess_alist
= Qnil
;
6063 for (i
= 0; i
< MAXDESC
; i
++)
6065 chan_process
[i
] = Qnil
;
6066 proc_buffered_char
[i
] = -1;
6068 bzero (proc_decode_coding_system
, sizeof proc_decode_coding_system
);
6069 bzero (proc_encode_coding_system
, sizeof proc_encode_coding_system
);
6070 #ifdef DATAGRAM_SOCKETS
6071 bzero (datagram_address
, sizeof datagram_address
);
6076 Lisp_Object subfeatures
= Qnil
;
6077 #define ADD_SUBFEATURE(key, val) \
6078 subfeatures = Fcons (Fcons (key, Fcons (val, Qnil)), subfeatures)
6080 #ifdef NON_BLOCKING_CONNECT
6081 ADD_SUBFEATURE (QCnowait
, Qt
);
6083 #ifdef DATAGRAM_SOCKETS
6084 ADD_SUBFEATURE (QCtype
, Qdatagram
);
6086 #ifdef HAVE_LOCAL_SOCKETS
6087 ADD_SUBFEATURE (QCfamily
, Qlocal
);
6089 #ifdef HAVE_GETSOCKNAME
6090 ADD_SUBFEATURE (QCservice
, Qt
);
6092 #if !defined(TERM) && (defined(O_NONBLOCK) || defined(O_NDELAY))
6093 ADD_SUBFEATURE (QCserver
, Qt
);
6095 #ifdef SO_BINDTODEVICE
6096 ADD_SUBFEATURE (QCoptions
, intern ("bindtodevice"));
6099 ADD_SUBFEATURE (QCoptions
, intern ("broadcast"));
6102 ADD_SUBFEATURE (QCoptions
, intern ("dontroute"));
6105 ADD_SUBFEATURE (QCoptions
, intern ("keepalive"));
6108 ADD_SUBFEATURE (QCoptions
, intern ("linger"));
6111 ADD_SUBFEATURE (QCoptions
, intern ("oobinline"));
6114 ADD_SUBFEATURE (QCoptions
, intern ("priority"));
6117 ADD_SUBFEATURE (QCoptions
, intern ("reuseaddr"));
6119 Fprovide (intern ("make-network-process"), subfeatures
);
6121 #endif /* HAVE_SOCKETS */
6127 Qprocessp
= intern ("processp");
6128 staticpro (&Qprocessp
);
6129 Qrun
= intern ("run");
6131 Qstop
= intern ("stop");
6133 Qsignal
= intern ("signal");
6134 staticpro (&Qsignal
);
6136 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
6139 Qexit = intern ("exit");
6140 staticpro (&Qexit); */
6142 Qopen
= intern ("open");
6144 Qclosed
= intern ("closed");
6145 staticpro (&Qclosed
);
6146 Qconnect
= intern ("connect");
6147 staticpro (&Qconnect
);
6148 Qfailed
= intern ("failed");
6149 staticpro (&Qfailed
);
6150 Qlisten
= intern ("listen");
6151 staticpro (&Qlisten
);
6152 Qlocal
= intern ("local");
6153 staticpro (&Qlocal
);
6154 Qdatagram
= intern ("datagram");
6155 staticpro (&Qdatagram
);
6157 QCname
= intern (":name");
6158 staticpro (&QCname
);
6159 QCbuffer
= intern (":buffer");
6160 staticpro (&QCbuffer
);
6161 QChost
= intern (":host");
6162 staticpro (&QChost
);
6163 QCservice
= intern (":service");
6164 staticpro (&QCservice
);
6165 QCtype
= intern (":type");
6166 staticpro (&QCtype
);
6167 QClocal
= intern (":local");
6168 staticpro (&QClocal
);
6169 QCremote
= intern (":remote");
6170 staticpro (&QCremote
);
6171 QCcoding
= intern (":coding");
6172 staticpro (&QCcoding
);
6173 QCserver
= intern (":server");
6174 staticpro (&QCserver
);
6175 QCnowait
= intern (":nowait");
6176 staticpro (&QCnowait
);
6177 QCsentinel
= intern (":sentinel");
6178 staticpro (&QCsentinel
);
6179 QClog
= intern (":log");
6181 QCnoquery
= intern (":noquery");
6182 staticpro (&QCnoquery
);
6183 QCstop
= intern (":stop");
6184 staticpro (&QCstop
);
6185 QCoptions
= intern (":options");
6186 staticpro (&QCoptions
);
6188 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
6189 staticpro (&Qlast_nonmenu_event
);
6191 staticpro (&Vprocess_alist
);
6193 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
6194 doc
: /* *Non-nil means delete processes immediately when they exit.
6195 nil means don't delete them until `list-processes' is run. */);
6197 delete_exited_processes
= 1;
6199 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
6200 doc
: /* Control type of device used to communicate with subprocesses.
6201 Values are nil to use a pipe, or t or `pty' to use a pty.
6202 The value has no effect if the system has no ptys or if all ptys are busy:
6203 then a pipe is used in any case.
6204 The value takes effect when `start-process' is called. */);
6205 Vprocess_connection_type
= Qt
;
6207 defsubr (&Sprocessp
);
6208 defsubr (&Sget_process
);
6209 defsubr (&Sget_buffer_process
);
6210 defsubr (&Sdelete_process
);
6211 defsubr (&Sprocess_status
);
6212 defsubr (&Sprocess_exit_status
);
6213 defsubr (&Sprocess_id
);
6214 defsubr (&Sprocess_name
);
6215 defsubr (&Sprocess_tty_name
);
6216 defsubr (&Sprocess_command
);
6217 defsubr (&Sset_process_buffer
);
6218 defsubr (&Sprocess_buffer
);
6219 defsubr (&Sprocess_mark
);
6220 defsubr (&Sset_process_filter
);
6221 defsubr (&Sprocess_filter
);
6222 defsubr (&Sset_process_sentinel
);
6223 defsubr (&Sprocess_sentinel
);
6224 defsubr (&Sset_process_window_size
);
6225 defsubr (&Sset_process_inherit_coding_system_flag
);
6226 defsubr (&Sprocess_inherit_coding_system_flag
);
6227 defsubr (&Sset_process_query_on_exit_flag
);
6228 defsubr (&Sprocess_query_on_exit_flag
);
6229 defsubr (&Sprocess_contact
);
6230 defsubr (&Slist_processes
);
6231 defsubr (&Sprocess_list
);
6232 defsubr (&Sstart_process
);
6234 defsubr (&Sset_network_process_options
);
6235 defsubr (&Smake_network_process
);
6236 #endif /* HAVE_SOCKETS */
6237 #ifdef DATAGRAM_SOCKETS
6238 defsubr (&Sprocess_datagram_address
);
6239 defsubr (&Sset_process_datagram_address
);
6241 defsubr (&Saccept_process_output
);
6242 defsubr (&Sprocess_send_region
);
6243 defsubr (&Sprocess_send_string
);
6244 defsubr (&Sinterrupt_process
);
6245 defsubr (&Skill_process
);
6246 defsubr (&Squit_process
);
6247 defsubr (&Sstop_process
);
6248 defsubr (&Scontinue_process
);
6249 defsubr (&Sprocess_running_child_p
);
6250 defsubr (&Sprocess_send_eof
);
6251 defsubr (&Ssignal_process
);
6252 defsubr (&Swaiting_for_user_input_p
);
6253 /* defsubr (&Sprocess_connection); */
6254 defsubr (&Sset_process_coding_system
);
6255 defsubr (&Sprocess_coding_system
);
6259 #else /* not subprocesses */
6261 #include <sys/types.h>
6265 #include "systime.h"
6266 #include "charset.h"
6268 #include "termopts.h"
6269 #include "sysselect.h"
6271 extern int frame_garbaged
;
6273 extern EMACS_TIME
timer_check ();
6274 extern int timers_run
;
6278 /* As described above, except assuming that there are no subprocesses:
6280 Wait for timeout to elapse and/or keyboard input to be available.
6283 timeout in seconds, or
6284 zero for no limit, or
6285 -1 means gobble data immediately available but don't wait for any.
6287 read_kbd is a Lisp_Object:
6288 0 to ignore keyboard input, or
6289 1 to return when input is available, or
6290 -1 means caller will actually read the input, so don't throw to
6292 a cons cell, meaning wait until its car is non-nil
6293 (and gobble terminal input into the buffer if any arrives), or
6294 We know that read_kbd will never be a Lisp_Process, since
6295 `subprocesses' isn't defined.
6297 do_display != 0 means redisplay should be done to show subprocess
6298 output that arrives.
6300 Return true iff we received input from any process. */
6303 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
6304 int time_limit
, microsecs
;
6305 Lisp_Object read_kbd
;
6309 EMACS_TIME end_time
, timeout
;
6310 SELECT_TYPE waitchannels
;
6312 /* Either nil or a cons cell, the car of which is of interest and
6313 may be changed outside of this routine. */
6314 Lisp_Object wait_for_cell
= Qnil
;
6316 /* If waiting for non-nil in a cell, record where. */
6317 if (CONSP (read_kbd
))
6319 wait_for_cell
= read_kbd
;
6320 XSETFASTINT (read_kbd
, 0);
6323 /* What does time_limit really mean? */
6324 if (time_limit
|| microsecs
)
6326 EMACS_GET_TIME (end_time
);
6327 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
6328 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6331 /* Turn off periodic alarms (in case they are in use)
6332 and then turn off any other atimers,
6333 because the select emulator uses alarms. */
6335 turn_on_atimers (0);
6339 int timeout_reduced_for_timers
= 0;
6341 /* If calling from keyboard input, do not quit
6342 since we want to return C-g as an input character.
6343 Otherwise, do pending quit if requested. */
6344 if (XINT (read_kbd
) >= 0)
6347 /* Exit now if the cell we're waiting for became non-nil. */
6348 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6351 /* Compute time from now till when time limit is up */
6352 /* Exit if already run out */
6353 if (time_limit
== -1)
6355 /* -1 specified for timeout means
6356 gobble output available now
6357 but don't wait at all. */
6359 EMACS_SET_SECS_USECS (timeout
, 0, 0);
6361 else if (time_limit
|| microsecs
)
6363 EMACS_GET_TIME (timeout
);
6364 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6365 if (EMACS_TIME_NEG_P (timeout
))
6370 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
6373 /* If our caller will not immediately handle keyboard events,
6374 run timer events directly.
6375 (Callers that will immediately read keyboard events
6376 call timer_delay on their own.) */
6377 if (NILP (wait_for_cell
))
6379 EMACS_TIME timer_delay
;
6383 int old_timers_run
= timers_run
;
6384 timer_delay
= timer_check (1);
6385 if (timers_run
!= old_timers_run
&& do_display
)
6386 /* We must retry, since a timer may have requeued itself
6387 and that could alter the time delay. */
6388 redisplay_preserve_echo_area (14);
6392 while (!detect_input_pending ());
6394 /* If there is unread keyboard input, also return. */
6395 if (XINT (read_kbd
) != 0
6396 && requeued_events_pending_p ())
6399 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
6401 EMACS_TIME difference
;
6402 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
6403 if (EMACS_TIME_NEG_P (difference
))
6405 timeout
= timer_delay
;
6406 timeout_reduced_for_timers
= 1;
6411 /* Cause C-g and alarm signals to take immediate action,
6412 and cause input available signals to zero out timeout. */
6413 if (XINT (read_kbd
) < 0)
6414 set_waiting_for_input (&timeout
);
6416 /* Wait till there is something to do. */
6418 if (! XINT (read_kbd
) && NILP (wait_for_cell
))
6419 FD_ZERO (&waitchannels
);
6421 FD_SET (0, &waitchannels
);
6423 /* If a frame has been newly mapped and needs updating,
6424 reprocess its display stuff. */
6425 if (frame_garbaged
&& do_display
)
6427 clear_waiting_for_input ();
6428 redisplay_preserve_echo_area (15);
6429 if (XINT (read_kbd
) < 0)
6430 set_waiting_for_input (&timeout
);
6433 if (XINT (read_kbd
) && detect_input_pending ())
6436 FD_ZERO (&waitchannels
);
6439 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
6444 /* Make C-g and alarm signals set flags again */
6445 clear_waiting_for_input ();
6447 /* If we woke up due to SIGWINCH, actually change size now. */
6448 do_pending_window_change (0);
6450 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
6451 /* We waited the full specified time, so return now. */
6456 /* If the system call was interrupted, then go around the
6458 if (xerrno
== EINTR
)
6459 FD_ZERO (&waitchannels
);
6461 error ("select error: %s", emacs_strerror (xerrno
));
6464 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
6465 /* System sometimes fails to deliver SIGIO. */
6466 kill (getpid (), SIGIO
);
6469 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
6470 kill (getpid (), SIGIO
);
6473 /* Check for keyboard input */
6475 if ((XINT (read_kbd
) != 0)
6476 && detect_input_pending_run_timers (do_display
))
6478 swallow_events (do_display
);
6479 if (detect_input_pending_run_timers (do_display
))
6483 /* If there is unread keyboard input, also return. */
6484 if (XINT (read_kbd
) != 0
6485 && requeued_events_pending_p ())
6488 /* If wait_for_cell. check for keyboard input
6489 but don't run any timers.
6490 ??? (It seems wrong to me to check for keyboard
6491 input at all when wait_for_cell, but the code
6492 has been this way since July 1994.
6493 Try changing this after version 19.31.) */
6494 if (! NILP (wait_for_cell
)
6495 && detect_input_pending ())
6497 swallow_events (do_display
);
6498 if (detect_input_pending ())
6502 /* Exit now if the cell we're waiting for became non-nil. */
6503 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6513 /* Don't confuse make-docfile by having two doc strings for this function.
6514 make-docfile does not pay attention to #if, for good reason! */
6515 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
6518 register Lisp_Object name
;
6523 /* Don't confuse make-docfile by having two doc strings for this function.
6524 make-docfile does not pay attention to #if, for good reason! */
6525 DEFUN ("process-inherit-coding-system-flag",
6526 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
6530 register Lisp_Object process
;
6532 /* Ignore the argument and return the value of
6533 inherit-process-coding-system. */
6534 return inherit_process_coding_system
? Qt
: Qnil
;
6537 /* Kill all processes associated with `buffer'.
6538 If `buffer' is nil, kill all processes.
6539 Since we have no subprocesses, this does nothing. */
6542 kill_buffer_processes (buffer
)
6555 QCtype
= intern (":type");
6556 staticpro (&QCtype
);
6558 defsubr (&Sget_buffer_process
);
6559 defsubr (&Sprocess_inherit_coding_system_flag
);
6563 #endif /* not subprocesses */