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 turn_on_atimers (0);
3662 int timeout_reduced_for_timers
= 0;
3664 /* If calling from keyboard input, do not quit
3665 since we want to return C-g as an input character.
3666 Otherwise, do pending quit if requested. */
3667 if (XINT (read_kbd
) >= 0)
3670 /* Exit now if the cell we're waiting for became non-nil. */
3671 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
3674 /* Compute time from now till when time limit is up */
3675 /* Exit if already run out */
3676 if (time_limit
== -1)
3678 /* -1 specified for timeout means
3679 gobble output available now
3680 but don't wait at all. */
3682 EMACS_SET_SECS_USECS (timeout
, 0, 0);
3684 else if (time_limit
|| microsecs
)
3686 EMACS_GET_TIME (timeout
);
3687 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
3688 if (EMACS_TIME_NEG_P (timeout
))
3693 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
3696 /* Normally we run timers here.
3697 But not if wait_for_cell; in those cases,
3698 the wait is supposed to be short,
3699 and those callers cannot handle running arbitrary Lisp code here. */
3700 if (NILP (wait_for_cell
))
3702 EMACS_TIME timer_delay
;
3706 int old_timers_run
= timers_run
;
3707 struct buffer
*old_buffer
= current_buffer
;
3709 timer_delay
= timer_check (1);
3711 /* If a timer has run, this might have changed buffers
3712 an alike. Make read_key_sequence aware of that. */
3713 if (timers_run
!= old_timers_run
3714 && old_buffer
!= current_buffer
3715 && waiting_for_user_input_p
== -1)
3716 record_asynch_buffer_change ();
3718 if (timers_run
!= old_timers_run
&& do_display
)
3719 /* We must retry, since a timer may have requeued itself
3720 and that could alter the time_delay. */
3721 redisplay_preserve_echo_area (9);
3725 while (!detect_input_pending ());
3727 /* If there is unread keyboard input, also return. */
3728 if (XINT (read_kbd
) != 0
3729 && requeued_events_pending_p ())
3732 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
3734 EMACS_TIME difference
;
3735 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
3736 if (EMACS_TIME_NEG_P (difference
))
3738 timeout
= timer_delay
;
3739 timeout_reduced_for_timers
= 1;
3742 /* If time_limit is -1, we are not going to wait at all. */
3743 else if (time_limit
!= -1)
3745 /* This is so a breakpoint can be put here. */
3746 wait_reading_process_input_1 ();
3750 /* Cause C-g and alarm signals to take immediate action,
3751 and cause input available signals to zero out timeout.
3753 It is important that we do this before checking for process
3754 activity. If we get a SIGCHLD after the explicit checks for
3755 process activity, timeout is the only way we will know. */
3756 if (XINT (read_kbd
) < 0)
3757 set_waiting_for_input (&timeout
);
3759 /* If status of something has changed, and no input is
3760 available, notify the user of the change right away. After
3761 this explicit check, we'll let the SIGCHLD handler zap
3762 timeout to get our attention. */
3763 if (update_tick
!= process_tick
&& do_display
)
3765 SELECT_TYPE Atemp
, Ctemp
;
3767 Atemp
= input_wait_mask
;
3769 /* On Mac OS X, the SELECT system call always says input is
3770 present (for reading) at stdin, even when none is. This
3771 causes the call to SELECT below to return 1 and
3772 status_notify not to be called. As a result output of
3773 subprocesses are incorrectly discarded. */
3776 Ctemp
= connect_wait_mask
;
3777 EMACS_SET_SECS_USECS (timeout
, 0, 0);
3778 if ((select (max (max_process_desc
, max_keyboard_desc
) + 1,
3780 (num_pending_connects
> 0 ? &Ctemp
: (SELECT_TYPE
*)0),
3781 (SELECT_TYPE
*)0, &timeout
)
3784 /* It's okay for us to do this and then continue with
3785 the loop, since timeout has already been zeroed out. */
3786 clear_waiting_for_input ();
3791 /* Don't wait for output from a non-running process. Just
3792 read whatever data has already been received. */
3793 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
3794 update_status (wait_proc
);
3796 && ! EQ (wait_proc
->status
, Qrun
)
3797 && ! EQ (wait_proc
->status
, Qconnect
))
3799 int nread
, total_nread
= 0;
3801 clear_waiting_for_input ();
3802 XSETPROCESS (proc
, wait_proc
);
3804 /* Read data from the process, until we exhaust it. */
3805 while (XINT (wait_proc
->infd
) >= 0)
3807 nread
= read_process_output (proc
, XINT (wait_proc
->infd
));
3813 total_nread
+= nread
;
3815 else if (nread
== -1 && EIO
== errno
)
3819 else if (nread
== -1 && EAGAIN
== errno
)
3823 else if (nread
== -1 && EWOULDBLOCK
== errno
)
3827 if (total_nread
> 0 && do_display
)
3828 redisplay_preserve_echo_area (10);
3833 /* Wait till there is something to do */
3835 if (!NILP (wait_for_cell
))
3837 Available
= non_process_wait_mask
;
3842 if (! XINT (read_kbd
))
3843 Available
= non_keyboard_wait_mask
;
3845 Available
= input_wait_mask
;
3846 check_connect
= (num_pending_connects
> 0);
3849 /* If frame size has changed or the window is newly mapped,
3850 redisplay now, before we start to wait. There is a race
3851 condition here; if a SIGIO arrives between now and the select
3852 and indicates that a frame is trashed, the select may block
3853 displaying a trashed screen. */
3854 if (frame_garbaged
&& do_display
)
3856 clear_waiting_for_input ();
3857 redisplay_preserve_echo_area (11);
3858 if (XINT (read_kbd
) < 0)
3859 set_waiting_for_input (&timeout
);
3863 if (XINT (read_kbd
) && detect_input_pending ())
3871 Connecting
= connect_wait_mask
;
3872 nfds
= select (max (max_process_desc
, max_keyboard_desc
) + 1,
3874 (check_connect
? &Connecting
: (SELECT_TYPE
*)0),
3875 (SELECT_TYPE
*)0, &timeout
);
3880 /* Make C-g and alarm signals set flags again */
3881 clear_waiting_for_input ();
3883 /* If we woke up due to SIGWINCH, actually change size now. */
3884 do_pending_window_change (0);
3886 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
3887 /* We wanted the full specified time, so return now. */
3891 if (xerrno
== EINTR
)
3894 /* Ultrix select seems to return ENOMEM when it is
3895 interrupted. Treat it just like EINTR. Bleah. Note
3896 that we want to test for the "ultrix" CPP symbol, not
3897 "__ultrix__"; the latter is only defined under GCC, but
3898 not by DEC's bundled CC. -JimB */
3899 else if (xerrno
== ENOMEM
)
3903 /* This happens for no known reason on ALLIANT.
3904 I am guessing that this is the right response. -- RMS. */
3905 else if (xerrno
== EFAULT
)
3908 else if (xerrno
== EBADF
)
3911 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
3912 the child's closure of the pts gives the parent a SIGHUP, and
3913 the ptc file descriptor is automatically closed,
3914 yielding EBADF here or at select() call above.
3915 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
3916 in m/ibmrt-aix.h), and here we just ignore the select error.
3917 Cleanup occurs c/o status_notify after SIGCLD. */
3918 no_avail
= 1; /* Cannot depend on values returned */
3924 error ("select error: %s", emacs_strerror (xerrno
));
3929 FD_ZERO (&Available
);
3933 #if defined(sun) && !defined(USG5_4)
3934 if (nfds
> 0 && keyboard_bit_set (&Available
)
3936 /* System sometimes fails to deliver SIGIO.
3938 David J. Mackenzie says that Emacs doesn't compile under
3939 Solaris if this code is enabled, thus the USG5_4 in the CPP
3940 conditional. "I haven't noticed any ill effects so far.
3941 If you find a Solaris expert somewhere, they might know
3943 kill (getpid (), SIGIO
);
3946 #if 0 /* When polling is used, interrupt_input is 0,
3947 so get_input_pending should read the input.
3948 So this should not be needed. */
3949 /* If we are using polling for input,
3950 and we see input available, make it get read now.
3951 Otherwise it might not actually get read for a second.
3952 And on hpux, since we turn off polling in wait_reading_process_input,
3953 it might never get read at all if we don't spend much time
3954 outside of wait_reading_process_input. */
3955 if (XINT (read_kbd
) && interrupt_input
3956 && keyboard_bit_set (&Available
)
3957 && input_polling_used ())
3958 kill (getpid (), SIGALRM
);
3961 /* Check for keyboard input */
3962 /* If there is any, return immediately
3963 to give it higher priority than subprocesses */
3965 if (XINT (read_kbd
) != 0)
3967 int old_timers_run
= timers_run
;
3968 struct buffer
*old_buffer
= current_buffer
;
3971 if (detect_input_pending_run_timers (do_display
))
3973 swallow_events (do_display
);
3974 if (detect_input_pending_run_timers (do_display
))
3978 /* If a timer has run, this might have changed buffers
3979 an alike. Make read_key_sequence aware of that. */
3980 if (timers_run
!= old_timers_run
3981 && waiting_for_user_input_p
== -1
3982 && old_buffer
!= current_buffer
)
3983 record_asynch_buffer_change ();
3989 /* If there is unread keyboard input, also return. */
3990 if (XINT (read_kbd
) != 0
3991 && requeued_events_pending_p ())
3994 /* If we are not checking for keyboard input now,
3995 do process events (but don't run any timers).
3996 This is so that X events will be processed.
3997 Otherwise they may have to wait until polling takes place.
3998 That would causes delays in pasting selections, for example.
4000 (We used to do this only if wait_for_cell.) */
4001 if (XINT (read_kbd
) == 0 && detect_input_pending ())
4003 swallow_events (do_display
);
4004 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4005 if (detect_input_pending ())
4010 /* Exit now if the cell we're waiting for became non-nil. */
4011 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4015 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4016 go read it. This can happen with X on BSD after logging out.
4017 In that case, there really is no input and no SIGIO,
4018 but select says there is input. */
4020 if (XINT (read_kbd
) && interrupt_input
4021 && keyboard_bit_set (&Available
))
4022 kill (getpid (), SIGIO
);
4026 got_some_input
|= nfds
> 0;
4028 /* If checking input just got us a size-change event from X,
4029 obey it now if we should. */
4030 if (XINT (read_kbd
) || ! NILP (wait_for_cell
))
4031 do_pending_window_change (0);
4033 /* Check for data from a process. */
4034 if (no_avail
|| nfds
== 0)
4037 /* Really FIRST_PROC_DESC should be 0 on Unix,
4038 but this is safer in the short run. */
4039 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4041 if (FD_ISSET (channel
, &Available
)
4042 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
4046 /* If waiting for this channel, arrange to return as
4047 soon as no more input to be processed. No more
4049 if (wait_channel
== channel
)
4055 proc
= chan_process
[channel
];
4059 /* If this is a server stream socket, accept connection. */
4060 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4062 server_accept_connection (proc
, channel
);
4066 /* Read data from the process, starting with our
4067 buffered-ahead character if we have one. */
4069 nread
= read_process_output (proc
, channel
);
4072 /* Since read_process_output can run a filter,
4073 which can call accept-process-output,
4074 don't try to read from any other processes
4075 before doing the select again. */
4076 FD_ZERO (&Available
);
4079 redisplay_preserve_echo_area (12);
4082 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4085 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4086 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4088 else if (nread
== -1 && errno
== EAGAIN
)
4092 else if (nread
== -1 && errno
== EAGAIN
)
4094 /* Note that we cannot distinguish between no input
4095 available now and a closed pipe.
4096 With luck, a closed pipe will be accompanied by
4097 subprocess termination and SIGCHLD. */
4098 else if (nread
== 0 && !NETCONN_P (proc
))
4100 #endif /* O_NDELAY */
4101 #endif /* O_NONBLOCK */
4103 /* On some OSs with ptys, when the process on one end of
4104 a pty exits, the other end gets an error reading with
4105 errno = EIO instead of getting an EOF (0 bytes read).
4106 Therefore, if we get an error reading and errno =
4107 EIO, just continue, because the child process has
4108 exited and should clean itself up soon (e.g. when we
4111 However, it has been known to happen that the SIGCHLD
4112 got lost. So raise the signl again just in case.
4114 else if (nread
== -1 && errno
== EIO
)
4115 kill (getpid (), SIGCHLD
);
4116 #endif /* HAVE_PTYS */
4117 /* If we can detect process termination, don't consider the process
4118 gone just because its pipe is closed. */
4120 else if (nread
== 0 && !NETCONN_P (proc
))
4125 /* Preserve status of processes already terminated. */
4126 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
4127 deactivate_process (proc
);
4128 if (!NILP (XPROCESS (proc
)->raw_status_low
))
4129 update_status (XPROCESS (proc
));
4130 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4131 XPROCESS (proc
)->status
4132 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
4135 #ifdef NON_BLOCKING_CONNECT
4136 if (check_connect
&& FD_ISSET (channel
, &Connecting
))
4138 struct Lisp_Process
*p
;
4140 FD_CLR (channel
, &connect_wait_mask
);
4141 if (--num_pending_connects
< 0)
4144 proc
= chan_process
[channel
];
4148 p
= XPROCESS (proc
);
4151 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4152 So only use it on systems where it is known to work. */
4154 int xlen
= sizeof(xerrno
);
4155 if (getsockopt(channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4160 struct sockaddr pname
;
4161 int pnamelen
= sizeof(pname
);
4163 /* If connection failed, getpeername will fail. */
4165 if (getpeername(channel
, &pname
, &pnamelen
) < 0)
4167 /* Obtain connect failure code through error slippage. */
4170 if (errno
== ENOTCONN
&& read(channel
, &dummy
, 1) < 0)
4177 XSETINT (p
->tick
, ++process_tick
);
4178 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
4179 deactivate_process (proc
);
4184 /* Execute the sentinel here. If we had relied on
4185 status_notify to do it later, it will read input
4186 from the process before calling the sentinel. */
4187 exec_sentinel (proc
, build_string ("open\n"));
4188 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4190 FD_SET (XINT (p
->infd
), &input_wait_mask
);
4191 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
4195 #endif /* NON_BLOCKING_CONNECT */
4196 } /* end for each file descriptor */
4197 } /* end while exit conditions not met */
4199 waiting_for_user_input_p
= 0;
4201 /* If calling from keyboard input, do not quit
4202 since we want to return C-g as an input character.
4203 Otherwise, do pending quit if requested. */
4204 if (XINT (read_kbd
) >= 0)
4206 /* Prevent input_pending from remaining set if we quit. */
4207 clear_input_pending ();
4211 /* AlainF 5-Jul-1996
4212 HP-UX 10.10 seems to have problems with signals coming in
4213 Causes "poll: interrupted system call" messages when Emacs is run
4215 Turn periodic alarms back on */
4219 return got_some_input
;
4222 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
4225 read_process_output_call (fun_and_args
)
4226 Lisp_Object fun_and_args
;
4228 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
4232 read_process_output_error_handler (error
)
4235 cmd_error_internal (error
, "error in process filter: ");
4237 update_echo_area ();
4238 Fsleep_for (make_number (2), Qnil
);
4242 /* Read pending output from the process channel,
4243 starting with our buffered-ahead character if we have one.
4244 Yield number of decoded characters read.
4246 This function reads at most 1024 characters.
4247 If you want to read all available subprocess output,
4248 you must call it repeatedly until it returns zero.
4250 The characters read are decoded according to PROC's coding-system
4254 read_process_output (proc
, channel
)
4256 register int channel
;
4258 register int nchars
, nbytes
;
4260 register Lisp_Object outstream
;
4261 register struct buffer
*old
= current_buffer
;
4262 register struct Lisp_Process
*p
= XPROCESS (proc
);
4263 register int opoint
;
4264 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
4265 int carryover
= XINT (p
->decoding_carryover
);
4269 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
4271 vs
= get_vms_process_pointer (p
->pid
);
4275 return (0); /* Really weird if it does this */
4276 if (!(vs
->iosb
[0] & 1))
4277 return -1; /* I/O error */
4280 error ("Could not get VMS process pointer");
4281 chars
= vs
->inputBuffer
;
4282 nbytes
= clean_vms_buffer (chars
, vs
->iosb
[1]);
4285 start_vms_process_read (vs
); /* Crank up the next read on the process */
4286 return 1; /* Nothing worth printing, say we got 1 */
4290 /* The data carried over in the previous decoding (which are at
4291 the tail of decoding buffer) should be prepended to the new
4292 data read to decode all together. */
4293 chars
= (char *) alloca (nbytes
+ carryover
);
4294 bcopy (SDATA (p
->decoding_buf
), buf
, carryover
);
4295 bcopy (vs
->inputBuffer
, chars
+ carryover
, nbytes
);
4299 #ifdef DATAGRAM_SOCKETS
4300 /* A datagram is one packet; allow at least 1500+ bytes of data
4301 corresponding to the typical Ethernet frame size. */
4302 if (DATAGRAM_CHAN_P (channel
))
4304 /* carryover = 0; */ /* Does carryover make sense for datagrams? */
4309 chars
= (char *) alloca (carryover
+ readmax
);
4311 /* See the comment above. */
4312 bcopy (SDATA (p
->decoding_buf
), chars
, carryover
);
4314 #ifdef DATAGRAM_SOCKETS
4315 /* We have a working select, so proc_buffered_char is always -1. */
4316 if (DATAGRAM_CHAN_P (channel
))
4318 int len
= datagram_address
[channel
].len
;
4319 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
- carryover
,
4320 0, datagram_address
[channel
].sa
, &len
);
4324 if (proc_buffered_char
[channel
] < 0)
4325 nbytes
= emacs_read (channel
, chars
+ carryover
, readmax
- carryover
);
4328 chars
[carryover
] = proc_buffered_char
[channel
];
4329 proc_buffered_char
[channel
] = -1;
4330 nbytes
= emacs_read (channel
, chars
+ carryover
+ 1, readmax
- 1 - carryover
);
4334 nbytes
= nbytes
+ 1;
4336 #endif /* not VMS */
4338 XSETINT (p
->decoding_carryover
, 0);
4340 /* At this point, NBYTES holds number of bytes just received
4341 (including the one in proc_buffered_char[channel]). */
4344 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
4346 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
4349 /* Now set NBYTES how many bytes we must decode. */
4350 nbytes
+= carryover
;
4352 /* Read and dispose of the process output. */
4353 outstream
= p
->filter
;
4354 if (!NILP (outstream
))
4356 /* We inhibit quit here instead of just catching it so that
4357 hitting ^G when a filter happens to be running won't screw
4359 int count
= SPECPDL_INDEX ();
4360 Lisp_Object odeactivate
;
4361 Lisp_Object obuffer
, okeymap
;
4363 int outer_running_asynch_code
= running_asynch_code
;
4364 int waiting
= waiting_for_user_input_p
;
4366 /* No need to gcpro these, because all we do with them later
4367 is test them for EQness, and none of them should be a string. */
4368 odeactivate
= Vdeactivate_mark
;
4369 XSETBUFFER (obuffer
, current_buffer
);
4370 okeymap
= current_buffer
->keymap
;
4372 specbind (Qinhibit_quit
, Qt
);
4373 specbind (Qlast_nonmenu_event
, Qt
);
4375 /* In case we get recursively called,
4376 and we already saved the match data nonrecursively,
4377 save the same match data in safely recursive fashion. */
4378 if (outer_running_asynch_code
)
4381 /* Don't clobber the CURRENT match data, either! */
4382 tem
= Fmatch_data (Qnil
, Qnil
);
4383 restore_match_data ();
4384 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
4385 Fset_match_data (tem
);
4388 /* For speed, if a search happens within this code,
4389 save the match data in a special nonrecursive fashion. */
4390 running_asynch_code
= 1;
4392 text
= decode_coding_string (make_unibyte_string (chars
, nbytes
),
4394 if (NILP (buffer_defaults
.enable_multibyte_characters
))
4395 /* We had better return unibyte string. */
4396 text
= string_make_unibyte (text
);
4398 Vlast_coding_system_used
= coding
->symbol
;
4399 /* A new coding system might be found. */
4400 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
4402 p
->decode_coding_system
= coding
->symbol
;
4404 /* Don't call setup_coding_system for
4405 proc_decode_coding_system[channel] here. It is done in
4406 detect_coding called via decode_coding above. */
4408 /* If a coding system for encoding is not yet decided, we set
4409 it as the same as coding-system for decoding.
4411 But, before doing that we must check if
4412 proc_encode_coding_system[p->outfd] surely points to a
4413 valid memory because p->outfd will be changed once EOF is
4414 sent to the process. */
4415 if (NILP (p
->encode_coding_system
)
4416 && proc_encode_coding_system
[XINT (p
->outfd
)])
4418 p
->encode_coding_system
= coding
->symbol
;
4419 setup_coding_system (coding
->symbol
,
4420 proc_encode_coding_system
[XINT (p
->outfd
)]);
4424 carryover
= nbytes
- coding
->consumed
;
4425 bcopy (chars
+ coding
->consumed
, SDATA (p
->decoding_buf
),
4427 XSETINT (p
->decoding_carryover
, carryover
);
4428 nbytes
= SBYTES (text
);
4429 nchars
= SCHARS (text
);
4431 internal_condition_case_1 (read_process_output_call
,
4433 Fcons (proc
, Fcons (text
, Qnil
))),
4434 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
4435 read_process_output_error_handler
);
4437 /* If we saved the match data nonrecursively, restore it now. */
4438 restore_match_data ();
4439 running_asynch_code
= outer_running_asynch_code
;
4441 /* Handling the process output should not deactivate the mark. */
4442 Vdeactivate_mark
= odeactivate
;
4444 /* Restore waiting_for_user_input_p as it was
4445 when we were called, in case the filter clobbered it. */
4446 waiting_for_user_input_p
= waiting
;
4448 #if 0 /* Call record_asynch_buffer_change unconditionally,
4449 because we might have changed minor modes or other things
4450 that affect key bindings. */
4451 if (! EQ (Fcurrent_buffer (), obuffer
)
4452 || ! EQ (current_buffer
->keymap
, okeymap
))
4454 /* But do it only if the caller is actually going to read events.
4455 Otherwise there's no need to make him wake up, and it could
4456 cause trouble (for example it would make Fsit_for return). */
4457 if (waiting_for_user_input_p
== -1)
4458 record_asynch_buffer_change ();
4461 start_vms_process_read (vs
);
4463 unbind_to (count
, Qnil
);
4467 /* If no filter, write into buffer if it isn't dead. */
4468 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
4470 Lisp_Object old_read_only
;
4471 int old_begv
, old_zv
;
4472 int old_begv_byte
, old_zv_byte
;
4473 Lisp_Object odeactivate
;
4474 int before
, before_byte
;
4479 odeactivate
= Vdeactivate_mark
;
4481 Fset_buffer (p
->buffer
);
4483 opoint_byte
= PT_BYTE
;
4484 old_read_only
= current_buffer
->read_only
;
4487 old_begv_byte
= BEGV_BYTE
;
4488 old_zv_byte
= ZV_BYTE
;
4490 current_buffer
->read_only
= Qnil
;
4492 /* Insert new output into buffer
4493 at the current end-of-output marker,
4494 thus preserving logical ordering of input and output. */
4495 if (XMARKER (p
->mark
)->buffer
)
4496 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
4497 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
4500 SET_PT_BOTH (ZV
, ZV_BYTE
);
4502 before_byte
= PT_BYTE
;
4504 /* If the output marker is outside of the visible region, save
4505 the restriction and widen. */
4506 if (! (BEGV
<= PT
&& PT
<= ZV
))
4509 text
= decode_coding_string (make_unibyte_string (chars
, nbytes
),
4511 Vlast_coding_system_used
= coding
->symbol
;
4512 /* A new coding system might be found. See the comment in the
4513 similar code in the previous `if' block. */
4514 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
4516 p
->decode_coding_system
= coding
->symbol
;
4517 if (NILP (p
->encode_coding_system
)
4518 && proc_encode_coding_system
[XINT (p
->outfd
)])
4520 p
->encode_coding_system
= coding
->symbol
;
4521 setup_coding_system (coding
->symbol
,
4522 proc_encode_coding_system
[XINT (p
->outfd
)]);
4525 carryover
= nbytes
- coding
->consumed
;
4526 bcopy (chars
+ coding
->consumed
, SDATA (p
->decoding_buf
),
4528 XSETINT (p
->decoding_carryover
, carryover
);
4529 /* Adjust the multibyteness of TEXT to that of the buffer. */
4530 if (NILP (current_buffer
->enable_multibyte_characters
)
4531 != ! STRING_MULTIBYTE (text
))
4532 text
= (STRING_MULTIBYTE (text
)
4533 ? Fstring_as_unibyte (text
)
4534 : Fstring_as_multibyte (text
));
4535 nbytes
= SBYTES (text
);
4536 nchars
= SCHARS (text
);
4537 /* Insert before markers in case we are inserting where
4538 the buffer's mark is, and the user's next command is Meta-y. */
4539 insert_from_string_before_markers (text
, 0, 0, nchars
, nbytes
, 0);
4541 /* Make sure the process marker's position is valid when the
4542 process buffer is changed in the signal_after_change above.
4543 W3 is known to do that. */
4544 if (BUFFERP (p
->buffer
)
4545 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
4546 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
4548 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
4550 update_mode_lines
++;
4552 /* Make sure opoint and the old restrictions
4553 float ahead of any new text just as point would. */
4554 if (opoint
>= before
)
4556 opoint
+= PT
- before
;
4557 opoint_byte
+= PT_BYTE
- before_byte
;
4559 if (old_begv
> before
)
4561 old_begv
+= PT
- before
;
4562 old_begv_byte
+= PT_BYTE
- before_byte
;
4564 if (old_zv
>= before
)
4566 old_zv
+= PT
- before
;
4567 old_zv_byte
+= PT_BYTE
- before_byte
;
4570 /* If the restriction isn't what it should be, set it. */
4571 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
4572 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
4574 /* Handling the process output should not deactivate the mark. */
4575 Vdeactivate_mark
= odeactivate
;
4577 current_buffer
->read_only
= old_read_only
;
4578 SET_PT_BOTH (opoint
, opoint_byte
);
4579 set_buffer_internal (old
);
4582 start_vms_process_read (vs
);
4587 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
4589 doc
: /* Returns non-nil if emacs is waiting for input from the user.
4590 This is intended for use by asynchronous process output filters and sentinels. */)
4593 return (waiting_for_user_input_p
? Qt
: Qnil
);
4596 /* Sending data to subprocess */
4598 jmp_buf send_process_frame
;
4599 Lisp_Object process_sent_to
;
4602 send_process_trap ()
4608 longjmp (send_process_frame
, 1);
4611 /* Send some data to process PROC.
4612 BUF is the beginning of the data; LEN is the number of characters.
4613 OBJECT is the Lisp object that the data comes from. If OBJECT is
4614 nil or t, it means that the data comes from C string.
4616 If OBJECT is not nil, the data is encoded by PROC's coding-system
4617 for encoding before it is sent.
4619 This function can evaluate Lisp code and can garbage collect. */
4622 send_process (proc
, buf
, len
, object
)
4623 volatile Lisp_Object proc
;
4624 unsigned char *volatile buf
;
4626 volatile Lisp_Object object
;
4628 /* Use volatile to protect variables from being clobbered by longjmp. */
4630 struct coding_system
*coding
;
4631 struct gcpro gcpro1
;
4636 struct Lisp_Process
*p
= XPROCESS (proc
);
4637 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
4640 if (! NILP (XPROCESS (proc
)->raw_status_low
))
4641 update_status (XPROCESS (proc
));
4642 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
4643 error ("Process %s not running",
4644 SDATA (XPROCESS (proc
)->name
));
4645 if (XINT (XPROCESS (proc
)->outfd
) < 0)
4646 error ("Output file descriptor of %s is closed",
4647 SDATA (XPROCESS (proc
)->name
));
4649 coding
= proc_encode_coding_system
[XINT (XPROCESS (proc
)->outfd
)];
4650 Vlast_coding_system_used
= coding
->symbol
;
4652 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
4653 || (BUFFERP (object
)
4654 && !NILP (XBUFFER (object
)->enable_multibyte_characters
))
4657 if (!EQ (coding
->symbol
, XPROCESS (proc
)->encode_coding_system
))
4658 /* The coding system for encoding was changed to raw-text
4659 because we sent a unibyte text previously. Now we are
4660 sending a multibyte text, thus we must encode it by the
4661 original coding system specified for the current
4663 setup_coding_system (XPROCESS (proc
)->encode_coding_system
, coding
);
4664 /* src_multibyte should be set to 1 _after_ a call to
4665 setup_coding_system, since it resets src_multibyte to
4667 coding
->src_multibyte
= 1;
4671 /* For sending a unibyte text, character code conversion should
4672 not take place but EOL conversion should. So, setup raw-text
4673 or one of the subsidiary if we have not yet done it. */
4674 if (coding
->type
!= coding_type_raw_text
)
4676 if (CODING_REQUIRE_FLUSHING (coding
))
4678 /* But, before changing the coding, we must flush out data. */
4679 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
4680 send_process (proc
, "", 0, Qt
);
4682 coding
->src_multibyte
= 0;
4683 setup_raw_text_coding_system (coding
);
4686 coding
->dst_multibyte
= 0;
4688 if (CODING_REQUIRE_ENCODING (coding
))
4690 int require
= encoding_buffer_size (coding
, len
);
4691 int from_byte
= -1, from
= -1, to
= -1;
4692 unsigned char *temp_buf
= NULL
;
4694 if (BUFFERP (object
))
4696 from_byte
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
4697 from
= buf_bytepos_to_charpos (XBUFFER (object
), from_byte
);
4698 to
= buf_bytepos_to_charpos (XBUFFER (object
), from_byte
+ len
);
4700 else if (STRINGP (object
))
4702 from_byte
= buf
- SDATA (object
);
4703 from
= string_byte_to_char (object
, from_byte
);
4704 to
= string_byte_to_char (object
, from_byte
+ len
);
4707 if (coding
->composing
!= COMPOSITION_DISABLED
)
4710 coding_save_composition (coding
, from
, to
, object
);
4712 coding
->composing
= COMPOSITION_DISABLED
;
4715 if (SBYTES (XPROCESS (proc
)->encoding_buf
) < require
)
4716 XPROCESS (proc
)->encoding_buf
= make_uninit_string (require
);
4719 buf
= (BUFFERP (object
)
4720 ? BUF_BYTE_ADDRESS (XBUFFER (object
), from_byte
)
4721 : SDATA (object
) + from_byte
);
4723 object
= XPROCESS (proc
)->encoding_buf
;
4724 encode_coding (coding
, (char *) buf
, SDATA (object
),
4725 len
, SBYTES (object
));
4726 len
= coding
->produced
;
4727 buf
= SDATA (object
);
4733 vs
= get_vms_process_pointer (p
->pid
);
4735 error ("Could not find this process: %x", p
->pid
);
4736 else if (write_to_vms_process (vs
, buf
, len
))
4740 if (pty_max_bytes
== 0)
4742 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
4743 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
4745 if (pty_max_bytes
< 0)
4746 pty_max_bytes
= 250;
4748 pty_max_bytes
= 250;
4750 /* Deduct one, to leave space for the eof. */
4754 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
4755 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
4756 when returning with longjmp despite being declared volatile. */
4757 if (!setjmp (send_process_frame
))
4759 process_sent_to
= proc
;
4763 SIGTYPE (*old_sigpipe
)();
4765 /* Decide how much data we can send in one batch.
4766 Long lines need to be split into multiple batches. */
4767 if (!NILP (XPROCESS (proc
)->pty_flag
))
4769 /* Starting this at zero is always correct when not the first
4770 iteration because the previous iteration ended by sending C-d.
4771 It may not be correct for the first iteration
4772 if a partial line was sent in a separate send_process call.
4773 If that proves worth handling, we need to save linepos
4774 in the process object. */
4776 unsigned char *ptr
= (unsigned char *) buf
;
4777 unsigned char *end
= (unsigned char *) buf
+ len
;
4779 /* Scan through this text for a line that is too long. */
4780 while (ptr
!= end
&& linepos
< pty_max_bytes
)
4788 /* If we found one, break the line there
4789 and put in a C-d to force the buffer through. */
4793 /* Send this batch, using one or more write calls. */
4796 int outfd
= XINT (XPROCESS (proc
)->outfd
);
4797 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
4798 #ifdef DATAGRAM_SOCKETS
4799 if (DATAGRAM_CHAN_P (outfd
))
4801 rv
= sendto (outfd
, (char *) buf
, this,
4802 0, datagram_address
[outfd
].sa
,
4803 datagram_address
[outfd
].len
);
4804 if (rv
< 0 && errno
== EMSGSIZE
)
4805 report_file_error ("sending datagram", Fcons (proc
, Qnil
));
4809 rv
= emacs_write (outfd
, (char *) buf
, this);
4810 signal (SIGPIPE
, old_sigpipe
);
4816 || errno
== EWOULDBLOCK
4822 /* Buffer is full. Wait, accepting input;
4823 that may allow the program
4824 to finish doing output and read more. */
4829 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
4830 /* A gross hack to work around a bug in FreeBSD.
4831 In the following sequence, read(2) returns
4835 write(2) 954 bytes, get EAGAIN
4836 read(2) 1024 bytes in process_read_output
4837 read(2) 11 bytes in process_read_output
4839 That is, read(2) returns more bytes than have
4840 ever been written successfully. The 1033 bytes
4841 read are the 1022 bytes written successfully
4842 after processing (for example with CRs added if
4843 the terminal is set up that way which it is
4844 here). The same bytes will be seen again in a
4845 later read(2), without the CRs. */
4847 if (errno
== EAGAIN
)
4850 ioctl (XINT (XPROCESS (proc
)->outfd
), TIOCFLUSH
,
4853 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
4855 /* Running filters might relocate buffers or strings.
4856 Arrange to relocate BUF. */
4857 if (BUFFERP (object
))
4858 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
4859 else if (STRINGP (object
))
4860 offset
= buf
- SDATA (object
);
4862 XSETFASTINT (zero
, 0);
4863 #ifdef EMACS_HAS_USECS
4864 wait_reading_process_input (0, 20000, zero
, 0);
4866 wait_reading_process_input (1, 0, zero
, 0);
4869 if (BUFFERP (object
))
4870 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
4871 else if (STRINGP (object
))
4872 buf
= offset
+ SDATA (object
);
4877 /* This is a real error. */
4878 report_file_error ("writing to process", Fcons (proc
, Qnil
));
4885 /* If we sent just part of the string, put in an EOF
4886 to force it through, before we send the rest. */
4888 Fprocess_send_eof (proc
);
4891 #endif /* not VMS */
4895 proc
= process_sent_to
;
4897 XPROCESS (proc
)->raw_status_low
= Qnil
;
4898 XPROCESS (proc
)->raw_status_high
= Qnil
;
4899 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
4900 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
4901 deactivate_process (proc
);
4903 error ("Error writing to process %s; closed it",
4904 SDATA (XPROCESS (proc
)->name
));
4906 error ("SIGPIPE raised on process %s; closed it",
4907 SDATA (XPROCESS (proc
)->name
));
4914 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
4916 doc
: /* Send current contents of region as input to PROCESS.
4917 PROCESS may be a process, a buffer, the name of a process or buffer, or
4918 nil, indicating the current buffer's process.
4919 Called from program, takes three arguments, PROCESS, START and END.
4920 If the region is more than 500 characters long,
4921 it is sent in several bunches. This may happen even for shorter regions.
4922 Output from processes can arrive in between bunches. */)
4923 (process
, start
, end
)
4924 Lisp_Object process
, start
, end
;
4929 proc
= get_process (process
);
4930 validate_region (&start
, &end
);
4932 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
4933 move_gap (XINT (start
));
4935 start1
= CHAR_TO_BYTE (XINT (start
));
4936 end1
= CHAR_TO_BYTE (XINT (end
));
4937 send_process (proc
, BYTE_POS_ADDR (start1
), end1
- start1
,
4938 Fcurrent_buffer ());
4943 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
4945 doc
: /* Send PROCESS the contents of STRING as input.
4946 PROCESS may be a process, a buffer, the name of a process or buffer, or
4947 nil, indicating the current buffer's process.
4948 If STRING is more than 500 characters long,
4949 it is sent in several bunches. This may happen even for shorter strings.
4950 Output from processes can arrive in between bunches. */)
4952 Lisp_Object process
, string
;
4955 CHECK_STRING (string
);
4956 proc
= get_process (process
);
4957 send_process (proc
, SDATA (string
),
4958 SBYTES (string
), string
);
4962 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
4963 Sprocess_running_child_p
, 0, 1, 0,
4964 doc
: /* Return t if PROCESS has given the terminal to a child.
4965 If the operating system does not make it possible to find out,
4966 return t unconditionally. */)
4968 Lisp_Object process
;
4970 /* Initialize in case ioctl doesn't exist or gives an error,
4971 in a way that will cause returning t. */
4974 struct Lisp_Process
*p
;
4976 proc
= get_process (process
);
4977 p
= XPROCESS (proc
);
4979 if (!EQ (p
->childp
, Qt
))
4980 error ("Process %s is not a subprocess",
4982 if (XINT (p
->infd
) < 0)
4983 error ("Process %s is not active",
4987 if (!NILP (p
->subtty
))
4988 ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
4990 ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
4991 #endif /* defined (TIOCGPGRP ) */
4993 if (gid
== XFASTINT (p
->pid
))
4998 /* send a signal number SIGNO to PROCESS.
4999 If CURRENT_GROUP is t, that means send to the process group
5000 that currently owns the terminal being used to communicate with PROCESS.
5001 This is used for various commands in shell mode.
5002 If CURRENT_GROUP is lambda, that means send to the process group
5003 that currently owns the terminal, but only if it is NOT the shell itself.
5005 If NOMSG is zero, insert signal-announcements into process's buffers
5008 If we can, we try to signal PROCESS by sending control characters
5009 down the pty. This allows us to signal inferiors who have changed
5010 their uid, for which killpg would return an EPERM error. */
5013 process_send_signal (process
, signo
, current_group
, nomsg
)
5014 Lisp_Object process
;
5016 Lisp_Object current_group
;
5020 register struct Lisp_Process
*p
;
5024 proc
= get_process (process
);
5025 p
= XPROCESS (proc
);
5027 if (!EQ (p
->childp
, Qt
))
5028 error ("Process %s is not a subprocess",
5030 if (XINT (p
->infd
) < 0)
5031 error ("Process %s is not active",
5034 if (NILP (p
->pty_flag
))
5035 current_group
= Qnil
;
5037 /* If we are using pgrps, get a pgrp number and make it negative. */
5038 if (NILP (current_group
))
5039 /* Send the signal to the shell's process group. */
5040 gid
= XFASTINT (p
->pid
);
5043 #ifdef SIGNALS_VIA_CHARACTERS
5044 /* If possible, send signals to the entire pgrp
5045 by sending an input character to it. */
5047 /* TERMIOS is the latest and bestest, and seems most likely to
5048 work. If the system has it, use it. */
5055 tcgetattr (XINT (p
->infd
), &t
);
5056 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
5060 tcgetattr (XINT (p
->infd
), &t
);
5061 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
5065 tcgetattr (XINT (p
->infd
), &t
);
5066 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5067 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
5069 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
5074 #else /* ! HAVE_TERMIOS */
5076 /* On Berkeley descendants, the following IOCTL's retrieve the
5077 current control characters. */
5078 #if defined (TIOCGLTC) && defined (TIOCGETC)
5086 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
5087 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
5090 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
5091 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
5095 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
5096 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
5098 #endif /* ! defined (SIGTSTP) */
5101 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
5103 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
5110 ioctl (XINT (p
->infd
), TCGETA
, &t
);
5111 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
5114 ioctl (XINT (p
->infd
), TCGETA
, &t
);
5115 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
5119 ioctl (XINT (p
->infd
), TCGETA
, &t
);
5120 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
5122 #endif /* ! defined (SIGTSTP) */
5124 #else /* ! defined (TCGETA) */
5125 Your configuration files are messed up
.
5126 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
5127 you'd better be using one of the alternatives above! */
5128 #endif /* ! defined (TCGETA) */
5129 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
5130 #endif /* ! defined HAVE_TERMIOS */
5132 /* The code above always returns from the function. */
5133 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5136 /* Get the current pgrp using the tty itself, if we have that.
5137 Otherwise, use the pty to get the pgrp.
5138 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5139 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5140 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5141 His patch indicates that if TIOCGPGRP returns an error, then
5142 we should just assume that p->pid is also the process group id. */
5146 if (!NILP (p
->subtty
))
5147 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
5149 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
5152 /* If we can't get the information, assume
5153 the shell owns the tty. */
5154 gid
= XFASTINT (p
->pid
);
5157 /* It is not clear whether anything really can set GID to -1.
5158 Perhaps on some system one of those ioctls can or could do so.
5159 Or perhaps this is vestigial. */
5162 #else /* ! defined (TIOCGPGRP ) */
5163 /* Can't select pgrps on this system, so we know that
5164 the child itself heads the pgrp. */
5165 gid
= XFASTINT (p
->pid
);
5166 #endif /* ! defined (TIOCGPGRP ) */
5168 /* If current_group is lambda, and the shell owns the terminal,
5169 don't send any signal. */
5170 if (EQ (current_group
, Qlambda
) && gid
== XFASTINT (p
->pid
))
5178 p
->raw_status_low
= Qnil
;
5179 p
->raw_status_high
= Qnil
;
5181 XSETINT (p
->tick
, ++process_tick
);
5185 #endif /* ! defined (SIGCONT) */
5188 send_process (proc
, "\003", 1, Qnil
); /* ^C */
5193 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
5198 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
5201 flush_pending_output (XINT (p
->infd
));
5205 /* If we don't have process groups, send the signal to the immediate
5206 subprocess. That isn't really right, but it's better than any
5207 obvious alternative. */
5210 kill (XFASTINT (p
->pid
), signo
);
5214 /* gid may be a pid, or minus a pgrp's number */
5216 if (!NILP (current_group
))
5217 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
5220 gid
= - XFASTINT (p
->pid
);
5223 #else /* ! defined (TIOCSIGSEND) */
5224 EMACS_KILLPG (gid
, signo
);
5225 #endif /* ! defined (TIOCSIGSEND) */
5228 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
5229 doc
: /* Interrupt process PROCESS.
5230 PROCESS may be a process, a buffer, or the name of a process or buffer.
5231 nil or no arg means current buffer's process.
5232 Second arg CURRENT-GROUP non-nil means send signal to
5233 the current process-group of the process's controlling terminal
5234 rather than to the process's own process group.
5235 If the process is a shell, this means interrupt current subjob
5236 rather than the shell.
5238 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
5239 don't send the signal. */)
5240 (process
, current_group
)
5241 Lisp_Object process
, current_group
;
5243 process_send_signal (process
, SIGINT
, current_group
, 0);
5247 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
5248 doc
: /* Kill process PROCESS. May be process or name of one.
5249 See function `interrupt-process' for more details on usage. */)
5250 (process
, current_group
)
5251 Lisp_Object process
, current_group
;
5253 process_send_signal (process
, SIGKILL
, current_group
, 0);
5257 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
5258 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
5259 See function `interrupt-process' for more details on usage. */)
5260 (process
, current_group
)
5261 Lisp_Object process
, current_group
;
5263 process_send_signal (process
, SIGQUIT
, current_group
, 0);
5267 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
5268 doc
: /* Stop process PROCESS. May be process or name of one.
5269 See function `interrupt-process' for more details on usage.
5270 If PROCESS is a network process, inhibit handling of incoming traffic. */)
5271 (process
, current_group
)
5272 Lisp_Object process
, current_group
;
5275 if (PROCESSP (process
) && NETCONN_P (process
))
5277 struct Lisp_Process
*p
;
5279 p
= XPROCESS (process
);
5280 if (NILP (p
->command
)
5281 && XINT (p
->infd
) >= 0)
5283 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
5284 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
5291 error ("no SIGTSTP support");
5293 process_send_signal (process
, SIGTSTP
, current_group
, 0);
5298 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
5299 doc
: /* Continue process PROCESS. May be process or name of one.
5300 See function `interrupt-process' for more details on usage.
5301 If PROCESS is a network process, resume handling of incoming traffic. */)
5302 (process
, current_group
)
5303 Lisp_Object process
, current_group
;
5306 if (PROCESSP (process
) && NETCONN_P (process
))
5308 struct Lisp_Process
*p
;
5310 p
= XPROCESS (process
);
5311 if (EQ (p
->command
, Qt
)
5312 && XINT (p
->infd
) >= 0
5313 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
5315 FD_SET (XINT (p
->infd
), &input_wait_mask
);
5316 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
5323 process_send_signal (process
, SIGCONT
, current_group
, 0);
5325 error ("no SIGCONT support");
5330 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
5331 2, 2, "nProcess number: \nnSignal code: ",
5332 doc
: /* Send the process with process id PID the signal with code SIGCODE.
5333 PID must be an integer. The process need not be a child of this Emacs.
5334 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
5336 Lisp_Object pid
, sigcode
;
5340 #define handle_signal(NAME, VALUE) \
5341 else if (!strcmp (name, NAME)) \
5342 XSETINT (sigcode, VALUE)
5344 if (INTEGERP (sigcode
))
5348 unsigned char *name
;
5350 CHECK_SYMBOL (sigcode
);
5351 name
= SDATA (SYMBOL_NAME (sigcode
));
5356 handle_signal ("SIGHUP", SIGHUP
);
5359 handle_signal ("SIGINT", SIGINT
);
5362 handle_signal ("SIGQUIT", SIGQUIT
);
5365 handle_signal ("SIGILL", SIGILL
);
5368 handle_signal ("SIGABRT", SIGABRT
);
5371 handle_signal ("SIGEMT", SIGEMT
);
5374 handle_signal ("SIGKILL", SIGKILL
);
5377 handle_signal ("SIGFPE", SIGFPE
);
5380 handle_signal ("SIGBUS", SIGBUS
);
5383 handle_signal ("SIGSEGV", SIGSEGV
);
5386 handle_signal ("SIGSYS", SIGSYS
);
5389 handle_signal ("SIGPIPE", SIGPIPE
);
5392 handle_signal ("SIGALRM", SIGALRM
);
5395 handle_signal ("SIGTERM", SIGTERM
);
5398 handle_signal ("SIGURG", SIGURG
);
5401 handle_signal ("SIGSTOP", SIGSTOP
);
5404 handle_signal ("SIGTSTP", SIGTSTP
);
5407 handle_signal ("SIGCONT", SIGCONT
);
5410 handle_signal ("SIGCHLD", SIGCHLD
);
5413 handle_signal ("SIGTTIN", SIGTTIN
);
5416 handle_signal ("SIGTTOU", SIGTTOU
);
5419 handle_signal ("SIGIO", SIGIO
);
5422 handle_signal ("SIGXCPU", SIGXCPU
);
5425 handle_signal ("SIGXFSZ", SIGXFSZ
);
5428 handle_signal ("SIGVTALRM", SIGVTALRM
);
5431 handle_signal ("SIGPROF", SIGPROF
);
5434 handle_signal ("SIGWINCH", SIGWINCH
);
5437 handle_signal ("SIGINFO", SIGINFO
);
5440 handle_signal ("SIGUSR1", SIGUSR1
);
5443 handle_signal ("SIGUSR2", SIGUSR2
);
5446 error ("Undefined signal name %s", name
);
5449 #undef handle_signal
5451 return make_number (kill (XINT (pid
), XINT (sigcode
)));
5454 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
5455 doc
: /* Make PROCESS see end-of-file in its input.
5456 EOF comes after any text already sent to it.
5457 PROCESS may be a process, a buffer, the name of a process or buffer, or
5458 nil, indicating the current buffer's process.
5459 If PROCESS is a network connection, or is a process communicating
5460 through a pipe (as opposed to a pty), then you cannot send any more
5461 text to PROCESS after you call this function. */)
5463 Lisp_Object process
;
5466 struct coding_system
*coding
;
5468 if (DATAGRAM_CONN_P (process
))
5471 proc
= get_process (process
);
5472 coding
= proc_encode_coding_system
[XINT (XPROCESS (proc
)->outfd
)];
5474 /* Make sure the process is really alive. */
5475 if (! NILP (XPROCESS (proc
)->raw_status_low
))
5476 update_status (XPROCESS (proc
));
5477 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
5478 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
5480 if (CODING_REQUIRE_FLUSHING (coding
))
5482 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5483 send_process (proc
, "", 0, Qnil
);
5487 send_process (proc
, "\032", 1, Qnil
); /* ^z */
5489 if (!NILP (XPROCESS (proc
)->pty_flag
))
5490 send_process (proc
, "\004", 1, Qnil
);
5493 int old_outfd
, new_outfd
;
5495 #ifdef HAVE_SHUTDOWN
5496 /* If this is a network connection, or socketpair is used
5497 for communication with the subprocess, call shutdown to cause EOF.
5498 (In some old system, shutdown to socketpair doesn't work.
5499 Then we just can't win.) */
5500 if (NILP (XPROCESS (proc
)->pid
)
5501 || XINT (XPROCESS (proc
)->outfd
) == XINT (XPROCESS (proc
)->infd
))
5502 shutdown (XINT (XPROCESS (proc
)->outfd
), 1);
5503 /* In case of socketpair, outfd == infd, so don't close it. */
5504 if (XINT (XPROCESS (proc
)->outfd
) != XINT (XPROCESS (proc
)->infd
))
5505 emacs_close (XINT (XPROCESS (proc
)->outfd
));
5506 #else /* not HAVE_SHUTDOWN */
5507 emacs_close (XINT (XPROCESS (proc
)->outfd
));
5508 #endif /* not HAVE_SHUTDOWN */
5509 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
5510 old_outfd
= XINT (XPROCESS (proc
)->outfd
);
5512 if (!proc_encode_coding_system
[new_outfd
])
5513 proc_encode_coding_system
[new_outfd
]
5514 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
5515 bcopy (proc_encode_coding_system
[old_outfd
],
5516 proc_encode_coding_system
[new_outfd
],
5517 sizeof (struct coding_system
));
5518 bzero (proc_encode_coding_system
[old_outfd
],
5519 sizeof (struct coding_system
));
5521 XSETINT (XPROCESS (proc
)->outfd
, new_outfd
);
5527 /* Kill all processes associated with `buffer'.
5528 If `buffer' is nil, kill all processes */
5531 kill_buffer_processes (buffer
)
5534 Lisp_Object tail
, proc
;
5536 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
5538 proc
= XCDR (XCAR (tail
));
5539 if (GC_PROCESSP (proc
)
5540 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
5542 if (NETCONN_P (proc
))
5543 Fdelete_process (proc
);
5544 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
5545 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
5550 /* On receipt of a signal that a child status has changed, loop asking
5551 about children with changed statuses until the system says there
5554 All we do is change the status; we do not run sentinels or print
5555 notifications. That is saved for the next time keyboard input is
5556 done, in order to avoid timing errors.
5558 ** WARNING: this can be called during garbage collection.
5559 Therefore, it must not be fooled by the presence of mark bits in
5562 ** USG WARNING: Although it is not obvious from the documentation
5563 in signal(2), on a USG system the SIGCLD handler MUST NOT call
5564 signal() before executing at least one wait(), otherwise the
5565 handler will be called again, resulting in an infinite loop. The
5566 relevant portion of the documentation reads "SIGCLD signals will be
5567 queued and the signal-catching function will be continually
5568 reentered until the queue is empty". Invoking signal() causes the
5569 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
5573 sigchld_handler (signo
)
5576 int old_errno
= errno
;
5578 register struct Lisp_Process
*p
;
5579 extern EMACS_TIME
*input_available_clear_time
;
5583 sigheld
|= sigbit (SIGCHLD
);
5595 #endif /* no WUNTRACED */
5596 /* Keep trying to get a status until we get a definitive result. */
5600 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
5602 while (pid
< 0 && errno
== EINTR
);
5606 /* PID == 0 means no processes found, PID == -1 means a real
5607 failure. We have done all our job, so return. */
5609 /* USG systems forget handlers when they are used;
5610 must reestablish each time */
5611 #if defined (USG) && !defined (POSIX_SIGNALS)
5612 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
5615 sigheld
&= ~sigbit (SIGCHLD
);
5623 #endif /* no WNOHANG */
5625 /* Find the process that signaled us, and record its status. */
5628 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
5630 proc
= XCDR (XCAR (tail
));
5631 p
= XPROCESS (proc
);
5632 if (GC_EQ (p
->childp
, Qt
) && XINT (p
->pid
) == pid
)
5637 /* Look for an asynchronous process whose pid hasn't been filled
5640 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
5642 proc
= XCDR (XCAR (tail
));
5643 p
= XPROCESS (proc
);
5644 if (GC_INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
5649 /* Change the status of the process that was found. */
5652 union { int i
; WAITTYPE wt
; } u
;
5653 int clear_desc_flag
= 0;
5655 XSETINT (p
->tick
, ++process_tick
);
5657 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
5658 XSETINT (p
->raw_status_high
, u
.i
>> 16);
5660 /* If process has terminated, stop waiting for its output. */
5661 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
5662 && XINT (p
->infd
) >= 0)
5663 clear_desc_flag
= 1;
5665 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
5666 if (clear_desc_flag
)
5668 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
5669 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
5672 /* Tell wait_reading_process_input that it needs to wake up and
5674 if (input_available_clear_time
)
5675 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
5678 /* There was no asynchronous process found for that id. Check
5679 if we have a synchronous process. */
5682 synch_process_alive
= 0;
5684 /* Report the status of the synchronous process. */
5686 synch_process_retcode
= WRETCODE (w
);
5687 else if (WIFSIGNALED (w
))
5689 int code
= WTERMSIG (w
);
5692 synchronize_system_messages_locale ();
5693 signame
= strsignal (code
);
5696 signame
= "unknown";
5698 synch_process_death
= signame
;
5701 /* Tell wait_reading_process_input that it needs to wake up and
5703 if (input_available_clear_time
)
5704 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
5707 /* On some systems, we must return right away.
5708 If any more processes want to signal us, we will
5710 Otherwise (on systems that have WNOHANG), loop around
5711 to use up all the processes that have something to tell us. */
5712 #if (defined WINDOWSNT \
5713 || (defined USG && !defined GNU_LINUX \
5714 && !(defined HPUX && defined WNOHANG)))
5715 #if defined (USG) && ! defined (POSIX_SIGNALS)
5716 signal (signo
, sigchld_handler
);
5720 #endif /* USG, but not HPUX with WNOHANG */
5726 exec_sentinel_unwind (data
)
5729 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
5734 exec_sentinel_error_handler (error
)
5737 cmd_error_internal (error
, "error in process sentinel: ");
5739 update_echo_area ();
5740 Fsleep_for (make_number (2), Qnil
);
5745 exec_sentinel (proc
, reason
)
5746 Lisp_Object proc
, reason
;
5748 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
5749 register struct Lisp_Process
*p
= XPROCESS (proc
);
5750 int count
= SPECPDL_INDEX ();
5751 int outer_running_asynch_code
= running_asynch_code
;
5752 int waiting
= waiting_for_user_input_p
;
5754 /* No need to gcpro these, because all we do with them later
5755 is test them for EQness, and none of them should be a string. */
5756 odeactivate
= Vdeactivate_mark
;
5757 XSETBUFFER (obuffer
, current_buffer
);
5758 okeymap
= current_buffer
->keymap
;
5760 sentinel
= p
->sentinel
;
5761 if (NILP (sentinel
))
5764 /* Zilch the sentinel while it's running, to avoid recursive invocations;
5765 assure that it gets restored no matter how the sentinel exits. */
5767 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
5768 /* Inhibit quit so that random quits don't screw up a running filter. */
5769 specbind (Qinhibit_quit
, Qt
);
5770 specbind (Qlast_nonmenu_event
, Qt
);
5772 /* In case we get recursively called,
5773 and we already saved the match data nonrecursively,
5774 save the same match data in safely recursive fashion. */
5775 if (outer_running_asynch_code
)
5778 tem
= Fmatch_data (Qnil
, Qnil
);
5779 restore_match_data ();
5780 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
5781 Fset_match_data (tem
);
5784 /* For speed, if a search happens within this code,
5785 save the match data in a special nonrecursive fashion. */
5786 running_asynch_code
= 1;
5788 internal_condition_case_1 (read_process_output_call
,
5790 Fcons (proc
, Fcons (reason
, Qnil
))),
5791 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5792 exec_sentinel_error_handler
);
5794 /* If we saved the match data nonrecursively, restore it now. */
5795 restore_match_data ();
5796 running_asynch_code
= outer_running_asynch_code
;
5798 Vdeactivate_mark
= odeactivate
;
5800 /* Restore waiting_for_user_input_p as it was
5801 when we were called, in case the filter clobbered it. */
5802 waiting_for_user_input_p
= waiting
;
5805 if (! EQ (Fcurrent_buffer (), obuffer
)
5806 || ! EQ (current_buffer
->keymap
, okeymap
))
5808 /* But do it only if the caller is actually going to read events.
5809 Otherwise there's no need to make him wake up, and it could
5810 cause trouble (for example it would make Fsit_for return). */
5811 if (waiting_for_user_input_p
== -1)
5812 record_asynch_buffer_change ();
5814 unbind_to (count
, Qnil
);
5817 /* Report all recent events of a change in process status
5818 (either run the sentinel or output a message).
5819 This is usually done while Emacs is waiting for keyboard input
5820 but can be done at other times. */
5825 register Lisp_Object proc
, buffer
;
5826 Lisp_Object tail
, msg
;
5827 struct gcpro gcpro1
, gcpro2
;
5831 /* We need to gcpro tail; if read_process_output calls a filter
5832 which deletes a process and removes the cons to which tail points
5833 from Vprocess_alist, and then causes a GC, tail is an unprotected
5837 /* Set this now, so that if new processes are created by sentinels
5838 that we run, we get called again to handle their status changes. */
5839 update_tick
= process_tick
;
5841 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
5844 register struct Lisp_Process
*p
;
5846 proc
= Fcdr (Fcar (tail
));
5847 p
= XPROCESS (proc
);
5849 if (XINT (p
->tick
) != XINT (p
->update_tick
))
5851 XSETINT (p
->update_tick
, XINT (p
->tick
));
5853 /* If process is still active, read any output that remains. */
5854 while (! EQ (p
->filter
, Qt
)
5855 && ! EQ (p
->status
, Qconnect
)
5856 && ! EQ (p
->status
, Qlisten
)
5857 && ! EQ (p
->command
, Qt
) /* Network process not stopped. */
5858 && XINT (p
->infd
) >= 0
5859 && read_process_output (proc
, XINT (p
->infd
)) > 0);
5863 /* Get the text to use for the message. */
5864 if (!NILP (p
->raw_status_low
))
5866 msg
= status_message (p
->status
);
5868 /* If process is terminated, deactivate it or delete it. */
5870 if (CONSP (p
->status
))
5871 symbol
= XCAR (p
->status
);
5873 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
5874 || EQ (symbol
, Qclosed
))
5876 if (delete_exited_processes
)
5877 remove_process (proc
);
5879 deactivate_process (proc
);
5882 /* The actions above may have further incremented p->tick.
5883 So set p->update_tick again
5884 so that an error in the sentinel will not cause
5885 this code to be run again. */
5886 XSETINT (p
->update_tick
, XINT (p
->tick
));
5887 /* Now output the message suitably. */
5888 if (!NILP (p
->sentinel
))
5889 exec_sentinel (proc
, msg
);
5890 /* Don't bother with a message in the buffer
5891 when a process becomes runnable. */
5892 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
5894 Lisp_Object ro
, tem
;
5895 struct buffer
*old
= current_buffer
;
5896 int opoint
, opoint_byte
;
5897 int before
, before_byte
;
5899 ro
= XBUFFER (buffer
)->read_only
;
5901 /* Avoid error if buffer is deleted
5902 (probably that's why the process is dead, too) */
5903 if (NILP (XBUFFER (buffer
)->name
))
5905 Fset_buffer (buffer
);
5908 opoint_byte
= PT_BYTE
;
5909 /* Insert new output into buffer
5910 at the current end-of-output marker,
5911 thus preserving logical ordering of input and output. */
5912 if (XMARKER (p
->mark
)->buffer
)
5913 Fgoto_char (p
->mark
);
5915 SET_PT_BOTH (ZV
, ZV_BYTE
);
5918 before_byte
= PT_BYTE
;
5920 tem
= current_buffer
->read_only
;
5921 current_buffer
->read_only
= Qnil
;
5922 insert_string ("\nProcess ");
5923 Finsert (1, &p
->name
);
5924 insert_string (" ");
5926 current_buffer
->read_only
= tem
;
5927 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5929 if (opoint
>= before
)
5930 SET_PT_BOTH (opoint
+ (PT
- before
),
5931 opoint_byte
+ (PT_BYTE
- before_byte
));
5933 SET_PT_BOTH (opoint
, opoint_byte
);
5935 set_buffer_internal (old
);
5940 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
5941 redisplay_preserve_echo_area (13);
5947 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
5948 Sset_process_coding_system
, 1, 3, 0,
5949 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
5950 DECODING will be used to decode subprocess output and ENCODING to
5951 encode subprocess input. */)
5952 (proc
, decoding
, encoding
)
5953 register Lisp_Object proc
, decoding
, encoding
;
5955 register struct Lisp_Process
*p
;
5957 CHECK_PROCESS (proc
);
5958 p
= XPROCESS (proc
);
5959 if (XINT (p
->infd
) < 0)
5960 error ("Input file descriptor of %s closed", SDATA (p
->name
));
5961 if (XINT (p
->outfd
) < 0)
5962 error ("Output file descriptor of %s closed", SDATA (p
->name
));
5964 p
->decode_coding_system
= Fcheck_coding_system (decoding
);
5965 p
->encode_coding_system
= Fcheck_coding_system (encoding
);
5966 setup_coding_system (decoding
,
5967 proc_decode_coding_system
[XINT (p
->infd
)]);
5968 setup_coding_system (encoding
,
5969 proc_encode_coding_system
[XINT (p
->outfd
)]);
5974 DEFUN ("process-coding-system",
5975 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
5976 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
5978 register Lisp_Object proc
;
5980 CHECK_PROCESS (proc
);
5981 return Fcons (XPROCESS (proc
)->decode_coding_system
,
5982 XPROCESS (proc
)->encode_coding_system
);
5985 /* The first time this is called, assume keyboard input comes from DESC
5986 instead of from where we used to expect it.
5987 Subsequent calls mean assume input keyboard can come from DESC
5988 in addition to other places. */
5990 static int add_keyboard_wait_descriptor_called_flag
;
5993 add_keyboard_wait_descriptor (desc
)
5996 if (! add_keyboard_wait_descriptor_called_flag
)
5997 FD_CLR (0, &input_wait_mask
);
5998 add_keyboard_wait_descriptor_called_flag
= 1;
5999 FD_SET (desc
, &input_wait_mask
);
6000 FD_SET (desc
, &non_process_wait_mask
);
6001 if (desc
> max_keyboard_desc
)
6002 max_keyboard_desc
= desc
;
6005 /* From now on, do not expect DESC to give keyboard input. */
6008 delete_keyboard_wait_descriptor (desc
)
6012 int lim
= max_keyboard_desc
;
6014 FD_CLR (desc
, &input_wait_mask
);
6015 FD_CLR (desc
, &non_process_wait_mask
);
6017 if (desc
== max_keyboard_desc
)
6018 for (fd
= 0; fd
< lim
; fd
++)
6019 if (FD_ISSET (fd
, &input_wait_mask
)
6020 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6021 max_keyboard_desc
= fd
;
6024 /* Return nonzero if *MASK has a bit set
6025 that corresponds to one of the keyboard input descriptors. */
6028 keyboard_bit_set (mask
)
6033 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
6034 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6035 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6048 if (! noninteractive
|| initialized
)
6050 signal (SIGCHLD
, sigchld_handler
);
6053 FD_ZERO (&input_wait_mask
);
6054 FD_ZERO (&non_keyboard_wait_mask
);
6055 FD_ZERO (&non_process_wait_mask
);
6056 max_process_desc
= 0;
6058 FD_SET (0, &input_wait_mask
);
6060 Vprocess_alist
= Qnil
;
6061 for (i
= 0; i
< MAXDESC
; i
++)
6063 chan_process
[i
] = Qnil
;
6064 proc_buffered_char
[i
] = -1;
6066 bzero (proc_decode_coding_system
, sizeof proc_decode_coding_system
);
6067 bzero (proc_encode_coding_system
, sizeof proc_encode_coding_system
);
6068 #ifdef DATAGRAM_SOCKETS
6069 bzero (datagram_address
, sizeof datagram_address
);
6074 Lisp_Object subfeatures
= Qnil
;
6075 #define ADD_SUBFEATURE(key, val) \
6076 subfeatures = Fcons (Fcons (key, Fcons (val, Qnil)), subfeatures)
6078 #ifdef NON_BLOCKING_CONNECT
6079 ADD_SUBFEATURE (QCnowait
, Qt
);
6081 #ifdef DATAGRAM_SOCKETS
6082 ADD_SUBFEATURE (QCtype
, Qdatagram
);
6084 #ifdef HAVE_LOCAL_SOCKETS
6085 ADD_SUBFEATURE (QCfamily
, Qlocal
);
6087 #ifdef HAVE_GETSOCKNAME
6088 ADD_SUBFEATURE (QCservice
, Qt
);
6090 #if !defined(TERM) && (defined(O_NONBLOCK) || defined(O_NDELAY))
6091 ADD_SUBFEATURE (QCserver
, Qt
);
6093 #ifdef SO_BINDTODEVICE
6094 ADD_SUBFEATURE (QCoptions
, intern ("bindtodevice"));
6097 ADD_SUBFEATURE (QCoptions
, intern ("broadcast"));
6100 ADD_SUBFEATURE (QCoptions
, intern ("dontroute"));
6103 ADD_SUBFEATURE (QCoptions
, intern ("keepalive"));
6106 ADD_SUBFEATURE (QCoptions
, intern ("linger"));
6109 ADD_SUBFEATURE (QCoptions
, intern ("oobinline"));
6112 ADD_SUBFEATURE (QCoptions
, intern ("priority"));
6115 ADD_SUBFEATURE (QCoptions
, intern ("reuseaddr"));
6117 Fprovide (intern ("make-network-process"), subfeatures
);
6119 #endif /* HAVE_SOCKETS */
6125 Qprocessp
= intern ("processp");
6126 staticpro (&Qprocessp
);
6127 Qrun
= intern ("run");
6129 Qstop
= intern ("stop");
6131 Qsignal
= intern ("signal");
6132 staticpro (&Qsignal
);
6134 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
6137 Qexit = intern ("exit");
6138 staticpro (&Qexit); */
6140 Qopen
= intern ("open");
6142 Qclosed
= intern ("closed");
6143 staticpro (&Qclosed
);
6144 Qconnect
= intern ("connect");
6145 staticpro (&Qconnect
);
6146 Qfailed
= intern ("failed");
6147 staticpro (&Qfailed
);
6148 Qlisten
= intern ("listen");
6149 staticpro (&Qlisten
);
6150 Qlocal
= intern ("local");
6151 staticpro (&Qlocal
);
6152 Qdatagram
= intern ("datagram");
6153 staticpro (&Qdatagram
);
6155 QCname
= intern (":name");
6156 staticpro (&QCname
);
6157 QCbuffer
= intern (":buffer");
6158 staticpro (&QCbuffer
);
6159 QChost
= intern (":host");
6160 staticpro (&QChost
);
6161 QCservice
= intern (":service");
6162 staticpro (&QCservice
);
6163 QCtype
= intern (":type");
6164 staticpro (&QCtype
);
6165 QClocal
= intern (":local");
6166 staticpro (&QClocal
);
6167 QCremote
= intern (":remote");
6168 staticpro (&QCremote
);
6169 QCcoding
= intern (":coding");
6170 staticpro (&QCcoding
);
6171 QCserver
= intern (":server");
6172 staticpro (&QCserver
);
6173 QCnowait
= intern (":nowait");
6174 staticpro (&QCnowait
);
6175 QCsentinel
= intern (":sentinel");
6176 staticpro (&QCsentinel
);
6177 QClog
= intern (":log");
6179 QCnoquery
= intern (":noquery");
6180 staticpro (&QCnoquery
);
6181 QCstop
= intern (":stop");
6182 staticpro (&QCstop
);
6183 QCoptions
= intern (":options");
6184 staticpro (&QCoptions
);
6186 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
6187 staticpro (&Qlast_nonmenu_event
);
6189 staticpro (&Vprocess_alist
);
6191 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
6192 doc
: /* *Non-nil means delete processes immediately when they exit.
6193 nil means don't delete them until `list-processes' is run. */);
6195 delete_exited_processes
= 1;
6197 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
6198 doc
: /* Control type of device used to communicate with subprocesses.
6199 Values are nil to use a pipe, or t or `pty' to use a pty.
6200 The value has no effect if the system has no ptys or if all ptys are busy:
6201 then a pipe is used in any case.
6202 The value takes effect when `start-process' is called. */);
6203 Vprocess_connection_type
= Qt
;
6205 defsubr (&Sprocessp
);
6206 defsubr (&Sget_process
);
6207 defsubr (&Sget_buffer_process
);
6208 defsubr (&Sdelete_process
);
6209 defsubr (&Sprocess_status
);
6210 defsubr (&Sprocess_exit_status
);
6211 defsubr (&Sprocess_id
);
6212 defsubr (&Sprocess_name
);
6213 defsubr (&Sprocess_tty_name
);
6214 defsubr (&Sprocess_command
);
6215 defsubr (&Sset_process_buffer
);
6216 defsubr (&Sprocess_buffer
);
6217 defsubr (&Sprocess_mark
);
6218 defsubr (&Sset_process_filter
);
6219 defsubr (&Sprocess_filter
);
6220 defsubr (&Sset_process_sentinel
);
6221 defsubr (&Sprocess_sentinel
);
6222 defsubr (&Sset_process_window_size
);
6223 defsubr (&Sset_process_inherit_coding_system_flag
);
6224 defsubr (&Sprocess_inherit_coding_system_flag
);
6225 defsubr (&Sset_process_query_on_exit_flag
);
6226 defsubr (&Sprocess_query_on_exit_flag
);
6227 defsubr (&Sprocess_contact
);
6228 defsubr (&Slist_processes
);
6229 defsubr (&Sprocess_list
);
6230 defsubr (&Sstart_process
);
6232 defsubr (&Sset_network_process_options
);
6233 defsubr (&Smake_network_process
);
6234 #endif /* HAVE_SOCKETS */
6235 #ifdef DATAGRAM_SOCKETS
6236 defsubr (&Sprocess_datagram_address
);
6237 defsubr (&Sset_process_datagram_address
);
6239 defsubr (&Saccept_process_output
);
6240 defsubr (&Sprocess_send_region
);
6241 defsubr (&Sprocess_send_string
);
6242 defsubr (&Sinterrupt_process
);
6243 defsubr (&Skill_process
);
6244 defsubr (&Squit_process
);
6245 defsubr (&Sstop_process
);
6246 defsubr (&Scontinue_process
);
6247 defsubr (&Sprocess_running_child_p
);
6248 defsubr (&Sprocess_send_eof
);
6249 defsubr (&Ssignal_process
);
6250 defsubr (&Swaiting_for_user_input_p
);
6251 /* defsubr (&Sprocess_connection); */
6252 defsubr (&Sset_process_coding_system
);
6253 defsubr (&Sprocess_coding_system
);
6257 #else /* not subprocesses */
6259 #include <sys/types.h>
6263 #include "systime.h"
6264 #include "charset.h"
6266 #include "termopts.h"
6267 #include "sysselect.h"
6269 extern int frame_garbaged
;
6271 extern EMACS_TIME
timer_check ();
6272 extern int timers_run
;
6276 /* As described above, except assuming that there are no subprocesses:
6278 Wait for timeout to elapse and/or keyboard input to be available.
6281 timeout in seconds, or
6282 zero for no limit, or
6283 -1 means gobble data immediately available but don't wait for any.
6285 read_kbd is a Lisp_Object:
6286 0 to ignore keyboard input, or
6287 1 to return when input is available, or
6288 -1 means caller will actually read the input, so don't throw to
6290 a cons cell, meaning wait until its car is non-nil
6291 (and gobble terminal input into the buffer if any arrives), or
6292 We know that read_kbd will never be a Lisp_Process, since
6293 `subprocesses' isn't defined.
6295 do_display != 0 means redisplay should be done to show subprocess
6296 output that arrives.
6298 Return true iff we received input from any process. */
6301 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
6302 int time_limit
, microsecs
;
6303 Lisp_Object read_kbd
;
6307 EMACS_TIME end_time
, timeout
;
6308 SELECT_TYPE waitchannels
;
6310 /* Either nil or a cons cell, the car of which is of interest and
6311 may be changed outside of this routine. */
6312 Lisp_Object wait_for_cell
= Qnil
;
6314 /* If waiting for non-nil in a cell, record where. */
6315 if (CONSP (read_kbd
))
6317 wait_for_cell
= read_kbd
;
6318 XSETFASTINT (read_kbd
, 0);
6321 /* What does time_limit really mean? */
6322 if (time_limit
|| microsecs
)
6324 EMACS_GET_TIME (end_time
);
6325 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
6326 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6329 /* Turn off periodic alarms (in case they are in use)
6330 because the select emulator uses alarms. */
6331 turn_on_atimers (0);
6335 int timeout_reduced_for_timers
= 0;
6337 /* If calling from keyboard input, do not quit
6338 since we want to return C-g as an input character.
6339 Otherwise, do pending quit if requested. */
6340 if (XINT (read_kbd
) >= 0)
6343 /* Exit now if the cell we're waiting for became non-nil. */
6344 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6347 /* Compute time from now till when time limit is up */
6348 /* Exit if already run out */
6349 if (time_limit
== -1)
6351 /* -1 specified for timeout means
6352 gobble output available now
6353 but don't wait at all. */
6355 EMACS_SET_SECS_USECS (timeout
, 0, 0);
6357 else if (time_limit
|| microsecs
)
6359 EMACS_GET_TIME (timeout
);
6360 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6361 if (EMACS_TIME_NEG_P (timeout
))
6366 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
6369 /* If our caller will not immediately handle keyboard events,
6370 run timer events directly.
6371 (Callers that will immediately read keyboard events
6372 call timer_delay on their own.) */
6373 if (NILP (wait_for_cell
))
6375 EMACS_TIME timer_delay
;
6379 int old_timers_run
= timers_run
;
6380 timer_delay
= timer_check (1);
6381 if (timers_run
!= old_timers_run
&& do_display
)
6382 /* We must retry, since a timer may have requeued itself
6383 and that could alter the time delay. */
6384 redisplay_preserve_echo_area (14);
6388 while (!detect_input_pending ());
6390 /* If there is unread keyboard input, also return. */
6391 if (XINT (read_kbd
) != 0
6392 && requeued_events_pending_p ())
6395 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
6397 EMACS_TIME difference
;
6398 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
6399 if (EMACS_TIME_NEG_P (difference
))
6401 timeout
= timer_delay
;
6402 timeout_reduced_for_timers
= 1;
6407 /* Cause C-g and alarm signals to take immediate action,
6408 and cause input available signals to zero out timeout. */
6409 if (XINT (read_kbd
) < 0)
6410 set_waiting_for_input (&timeout
);
6412 /* Wait till there is something to do. */
6414 if (! XINT (read_kbd
) && NILP (wait_for_cell
))
6415 FD_ZERO (&waitchannels
);
6417 FD_SET (0, &waitchannels
);
6419 /* If a frame has been newly mapped and needs updating,
6420 reprocess its display stuff. */
6421 if (frame_garbaged
&& do_display
)
6423 clear_waiting_for_input ();
6424 redisplay_preserve_echo_area (15);
6425 if (XINT (read_kbd
) < 0)
6426 set_waiting_for_input (&timeout
);
6429 if (XINT (read_kbd
) && detect_input_pending ())
6432 FD_ZERO (&waitchannels
);
6435 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
6440 /* Make C-g and alarm signals set flags again */
6441 clear_waiting_for_input ();
6443 /* If we woke up due to SIGWINCH, actually change size now. */
6444 do_pending_window_change (0);
6446 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
6447 /* We waited the full specified time, so return now. */
6452 /* If the system call was interrupted, then go around the
6454 if (xerrno
== EINTR
)
6455 FD_ZERO (&waitchannels
);
6457 error ("select error: %s", emacs_strerror (xerrno
));
6460 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
6461 /* System sometimes fails to deliver SIGIO. */
6462 kill (getpid (), SIGIO
);
6465 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
6466 kill (getpid (), SIGIO
);
6469 /* Check for keyboard input */
6471 if ((XINT (read_kbd
) != 0)
6472 && detect_input_pending_run_timers (do_display
))
6474 swallow_events (do_display
);
6475 if (detect_input_pending_run_timers (do_display
))
6479 /* If there is unread keyboard input, also return. */
6480 if (XINT (read_kbd
) != 0
6481 && requeued_events_pending_p ())
6484 /* If wait_for_cell. check for keyboard input
6485 but don't run any timers.
6486 ??? (It seems wrong to me to check for keyboard
6487 input at all when wait_for_cell, but the code
6488 has been this way since July 1994.
6489 Try changing this after version 19.31.) */
6490 if (! NILP (wait_for_cell
)
6491 && detect_input_pending ())
6493 swallow_events (do_display
);
6494 if (detect_input_pending ())
6498 /* Exit now if the cell we're waiting for became non-nil. */
6499 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6509 /* Don't confuse make-docfile by having two doc strings for this function.
6510 make-docfile does not pay attention to #if, for good reason! */
6511 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
6514 register Lisp_Object name
;
6519 /* Don't confuse make-docfile by having two doc strings for this function.
6520 make-docfile does not pay attention to #if, for good reason! */
6521 DEFUN ("process-inherit-coding-system-flag",
6522 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
6526 register Lisp_Object process
;
6528 /* Ignore the argument and return the value of
6529 inherit-process-coding-system. */
6530 return inherit_process_coding_system
? Qt
: Qnil
;
6533 /* Kill all processes associated with `buffer'.
6534 If `buffer' is nil, kill all processes.
6535 Since we have no subprocesses, this does nothing. */
6538 kill_buffer_processes (buffer
)
6551 QCtype
= intern (":type");
6552 staticpro (&QCtype
);
6554 defsubr (&Sget_buffer_process
);
6555 defsubr (&Sprocess_inherit_coding_system_flag
);
6559 #endif /* not subprocesses */