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 XSTRING (string
)->data
[0] = DOWNCASE (XSTRING (string
)->data
[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", XSTRING (name
)->data
);
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", XSTRING (XBUFFER (obj
)->name
)->data
);
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
= XSTRING (p
->name
)->size
, (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
= XSTRING (XBUFFER (p
->buffer
)->name
)->size
, (i
> w_buffer
)))
1082 if (STRINGP (p
->tty_name
)
1083 && (i
= XSTRING (p
->tty_name
)->size
, (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"),
1209 XSTRING (port
)->data
);
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"),
1225 XSTRING (host
)->data
);
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_ptr
- specpdl
;
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
= STRING_BYTES (XSTRING (program
)) + 2;
1404 for (i
= 3; i
< nargs
; i
++)
1408 len
+= STRING_BYTES (XSTRING (tem
)) + 1; /* count the blank */
1410 new_argv
= (unsigned char *) alloca (len
);
1411 strcpy (new_argv
, XSTRING (program
)->data
);
1412 for (i
= 3; i
< nargs
; i
++)
1416 strcat (new_argv
, " ");
1417 strcat (new_argv
, XSTRING (tem
)->data
);
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 if (!IS_DIRECTORY_SEP (XSTRING (program
)->data
[0])
1426 && !(XSTRING (program
)->size
> 1
1427 && IS_DEVICE_SEP (XSTRING (program
)->data
[1])))
1429 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1432 GCPRO4 (name
, program
, buffer
, current_dir
);
1433 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, 1);
1436 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1437 tem
= Fexpand_file_name (tem
, Qnil
);
1438 tem
= ENCODE_FILE (tem
);
1439 new_argv
[0] = XSTRING (tem
)->data
;
1443 if (!NILP (Ffile_directory_p (program
)))
1444 error ("Specified program for new process is a directory");
1446 tem
= ENCODE_FILE (program
);
1447 new_argv
[0] = XSTRING (tem
)->data
;
1450 /* Here we encode arguments by the coding system used for sending
1451 data to the process. We don't support using different coding
1452 systems for encoding arguments and for encoding data sent to the
1455 for (i
= 3; i
< nargs
; i
++)
1459 if (STRING_MULTIBYTE (tem
))
1460 tem
= (code_convert_string_norecord
1461 (tem
, XPROCESS (proc
)->encode_coding_system
, 1));
1462 new_argv
[i
- 2] = XSTRING (tem
)->data
;
1464 new_argv
[i
- 2] = 0;
1465 #endif /* not VMS */
1467 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
1468 XPROCESS (proc
)->decoding_carryover
= make_number (0);
1469 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
1470 XPROCESS (proc
)->encoding_carryover
= make_number (0);
1472 XPROCESS (proc
)->inherit_coding_system_flag
1473 = (NILP (buffer
) || !inherit_process_coding_system
1476 create_process (proc
, (char **) new_argv
, current_dir
);
1478 return unbind_to (count
, proc
);
1481 /* This function is the unwind_protect form for Fstart_process. If
1482 PROC doesn't have its pid set, then we know someone has signaled
1483 an error and the process wasn't started successfully, so we should
1484 remove it from the process list. */
1486 start_process_unwind (proc
)
1489 if (!PROCESSP (proc
))
1492 /* Was PROC started successfully? */
1493 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1494 remove_process (proc
);
1500 create_process_1 (timer
)
1501 struct atimer
*timer
;
1503 /* Nothing to do. */
1507 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1510 /* Mimic blocking of signals on system V, which doesn't really have it. */
1512 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1513 int sigchld_deferred
;
1516 create_process_sigchld ()
1518 signal (SIGCHLD
, create_process_sigchld
);
1520 sigchld_deferred
= 1;
1526 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1528 create_process (process
, new_argv
, current_dir
)
1529 Lisp_Object process
;
1531 Lisp_Object current_dir
;
1533 int pid
, inchannel
, outchannel
;
1535 #ifdef POSIX_SIGNALS
1538 struct sigaction sigint_action
;
1539 struct sigaction sigquit_action
;
1541 struct sigaction sighup_action
;
1543 #else /* !POSIX_SIGNALS */
1546 SIGTYPE (*sigchld
)();
1549 #endif /* !POSIX_SIGNALS */
1550 /* Use volatile to protect variables from being clobbered by longjmp. */
1551 volatile int forkin
, forkout
;
1552 volatile int pty_flag
= 0;
1554 extern char **environ
;
1557 inchannel
= outchannel
= -1;
1560 if (!NILP (Vprocess_connection_type
))
1561 outchannel
= inchannel
= allocate_pty ();
1566 /* On USG systems it does not work to open the pty's tty here
1567 and then close and reopen it in the child. */
1569 /* Don't let this terminal become our controlling terminal
1570 (in case we don't have one). */
1571 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1573 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1576 report_file_error ("Opening pty", Qnil
);
1578 forkin
= forkout
= -1;
1579 #endif /* not USG */
1583 #endif /* HAVE_PTYS */
1586 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1587 report_file_error ("Opening socketpair", Qnil
);
1588 outchannel
= inchannel
= sv
[0];
1589 forkout
= forkin
= sv
[1];
1591 #else /* not SKTPAIR */
1596 report_file_error ("Creating pipe", Qnil
);
1602 emacs_close (inchannel
);
1603 emacs_close (forkout
);
1604 report_file_error ("Creating pipe", Qnil
);
1609 #endif /* not SKTPAIR */
1612 /* Replaced by close_process_descs */
1613 set_exclusive_use (inchannel
);
1614 set_exclusive_use (outchannel
);
1617 /* Stride people say it's a mystery why this is needed
1618 as well as the O_NDELAY, but that it fails without this. */
1619 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1622 ioctl (inchannel
, FIONBIO
, &one
);
1627 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1628 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1631 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1632 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1636 /* Record this as an active process, with its channels.
1637 As a result, child_setup will close Emacs's side of the pipes. */
1638 chan_process
[inchannel
] = process
;
1639 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1640 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1641 /* Record the tty descriptor used in the subprocess. */
1643 XPROCESS (process
)->subtty
= Qnil
;
1645 XSETFASTINT (XPROCESS (process
)->subtty
, forkin
);
1646 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1647 XPROCESS (process
)->status
= Qrun
;
1648 if (!proc_decode_coding_system
[inchannel
])
1649 proc_decode_coding_system
[inchannel
]
1650 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
1651 setup_coding_system (XPROCESS (process
)->decode_coding_system
,
1652 proc_decode_coding_system
[inchannel
]);
1653 if (!proc_encode_coding_system
[outchannel
])
1654 proc_encode_coding_system
[outchannel
]
1655 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
1656 setup_coding_system (XPROCESS (process
)->encode_coding_system
,
1657 proc_encode_coding_system
[outchannel
]);
1659 /* Delay interrupts until we have a chance to store
1660 the new fork's pid in its process structure */
1661 #ifdef POSIX_SIGNALS
1662 sigemptyset (&blocked
);
1664 sigaddset (&blocked
, SIGCHLD
);
1666 #ifdef HAVE_WORKING_VFORK
1667 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1668 this sets the parent's signal handlers as well as the child's.
1669 So delay all interrupts whose handlers the child might munge,
1670 and record the current handlers so they can be restored later. */
1671 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1672 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1674 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1676 #endif /* HAVE_WORKING_VFORK */
1677 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1678 #else /* !POSIX_SIGNALS */
1682 #else /* not BSD4_1 */
1683 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1684 sigsetmask (sigmask (SIGCHLD
));
1685 #else /* ordinary USG */
1687 sigchld_deferred
= 0;
1688 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1690 #endif /* ordinary USG */
1691 #endif /* not BSD4_1 */
1692 #endif /* SIGCHLD */
1693 #endif /* !POSIX_SIGNALS */
1695 FD_SET (inchannel
, &input_wait_mask
);
1696 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1697 if (inchannel
> max_process_desc
)
1698 max_process_desc
= inchannel
;
1700 /* Until we store the proper pid, enable sigchld_handler
1701 to recognize an unknown pid as standing for this process.
1702 It is very important not to let this `marker' value stay
1703 in the table after this function has returned; if it does
1704 it might cause call-process to hang and subsequent asynchronous
1705 processes to get their return values scrambled. */
1706 XSETINT (XPROCESS (process
)->pid
, -1);
1711 /* child_setup must clobber environ on systems with true vfork.
1712 Protect it from permanent change. */
1713 char **save_environ
= environ
;
1715 current_dir
= ENCODE_FILE (current_dir
);
1720 #endif /* not WINDOWSNT */
1722 int xforkin
= forkin
;
1723 int xforkout
= forkout
;
1725 #if 0 /* This was probably a mistake--it duplicates code later on,
1726 but fails to handle all the cases. */
1727 /* Make sure SIGCHLD is not blocked in the child. */
1728 sigsetmask (SIGEMPTYMASK
);
1731 /* Make the pty be the controlling terminal of the process. */
1733 /* First, disconnect its current controlling terminal. */
1735 /* We tried doing setsid only if pty_flag, but it caused
1736 process_set_signal to fail on SGI when using a pipe. */
1738 /* Make the pty's terminal the controlling terminal. */
1742 /* We ignore the return value
1743 because faith@cs.unc.edu says that is necessary on Linux. */
1744 ioctl (xforkin
, TIOCSCTTY
, 0);
1747 #else /* not HAVE_SETSID */
1749 /* It's very important to call setpgrp here and no time
1750 afterwards. Otherwise, we lose our controlling tty which
1751 is set when we open the pty. */
1754 #endif /* not HAVE_SETSID */
1755 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1756 if (pty_flag
&& xforkin
>= 0)
1759 tcgetattr (xforkin
, &t
);
1761 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1762 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1765 #if defined (NTTYDISC) && defined (TIOCSETD)
1766 if (pty_flag
&& xforkin
>= 0)
1768 /* Use new line discipline. */
1769 int ldisc
= NTTYDISC
;
1770 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1775 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1776 can do TIOCSPGRP only to the process's controlling tty. */
1779 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1780 I can't test it since I don't have 4.3. */
1781 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1782 ioctl (j
, TIOCNOTTY
, 0);
1785 /* In order to get a controlling terminal on some versions
1786 of BSD, it is necessary to put the process in pgrp 0
1787 before it opens the terminal. */
1795 #endif /* TIOCNOTTY */
1797 #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY)
1798 /*** There is a suggestion that this ought to be a
1799 conditional on TIOCSPGRP,
1800 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1801 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1802 that system does seem to need this code, even though
1803 both HAVE_SETSID and TIOCSCTTY are defined. */
1804 /* Now close the pty (if we had it open) and reopen it.
1805 This makes the pty the controlling terminal of the subprocess. */
1808 #ifdef SET_CHILD_PTY_PGRP
1809 int pgrp
= getpid ();
1812 /* I wonder if emacs_close (emacs_open (pty_name, ...))
1815 emacs_close (xforkin
);
1816 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
1820 emacs_write (1, "Couldn't open the pty terminal ", 31);
1821 emacs_write (1, pty_name
, strlen (pty_name
));
1822 emacs_write (1, "\n", 1);
1826 #ifdef SET_CHILD_PTY_PGRP
1827 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1828 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1831 #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */
1833 #ifdef SETUP_SLAVE_PTY
1838 #endif /* SETUP_SLAVE_PTY */
1840 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1841 Now reenable it in the child, so it will die when we want it to. */
1843 signal (SIGHUP
, SIG_DFL
);
1845 #endif /* HAVE_PTYS */
1847 signal (SIGINT
, SIG_DFL
);
1848 signal (SIGQUIT
, SIG_DFL
);
1850 /* Stop blocking signals in the child. */
1851 #ifdef POSIX_SIGNALS
1852 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1853 #else /* !POSIX_SIGNALS */
1857 #else /* not BSD4_1 */
1858 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1859 sigsetmask (SIGEMPTYMASK
);
1860 #else /* ordinary USG */
1862 signal (SIGCHLD
, sigchld
);
1864 #endif /* ordinary USG */
1865 #endif /* not BSD4_1 */
1866 #endif /* SIGCHLD */
1867 #endif /* !POSIX_SIGNALS */
1870 child_setup_tty (xforkout
);
1872 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1873 new_argv
, 1, current_dir
);
1874 #else /* not WINDOWSNT */
1875 child_setup (xforkin
, xforkout
, xforkout
,
1876 new_argv
, 1, current_dir
);
1877 #endif /* not WINDOWSNT */
1879 environ
= save_environ
;
1884 /* This runs in the Emacs process. */
1888 emacs_close (forkin
);
1889 if (forkin
!= forkout
&& forkout
>= 0)
1890 emacs_close (forkout
);
1894 /* vfork succeeded. */
1895 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
1898 register_child (pid
, inchannel
);
1899 #endif /* WINDOWSNT */
1901 /* If the subfork execv fails, and it exits,
1902 this close hangs. I don't know why.
1903 So have an interrupt jar it loose. */
1905 struct atimer
*timer
;
1909 EMACS_SET_SECS_USECS (offset
, 1, 0);
1910 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
1912 XPROCESS (process
)->subtty
= Qnil
;
1914 emacs_close (forkin
);
1916 cancel_atimer (timer
);
1920 if (forkin
!= forkout
&& forkout
>= 0)
1921 emacs_close (forkout
);
1925 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1928 XPROCESS (process
)->tty_name
= Qnil
;
1931 /* Restore the signal state whether vfork succeeded or not.
1932 (We will signal an error, below, if it failed.) */
1933 #ifdef POSIX_SIGNALS
1934 #ifdef HAVE_WORKING_VFORK
1935 /* Restore the parent's signal handlers. */
1936 sigaction (SIGINT
, &sigint_action
, 0);
1937 sigaction (SIGQUIT
, &sigquit_action
, 0);
1939 sigaction (SIGHUP
, &sighup_action
, 0);
1941 #endif /* HAVE_WORKING_VFORK */
1942 /* Stop blocking signals in the parent. */
1943 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1944 #else /* !POSIX_SIGNALS */
1948 #else /* not BSD4_1 */
1949 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1950 sigsetmask (SIGEMPTYMASK
);
1951 #else /* ordinary USG */
1953 signal (SIGCHLD
, sigchld
);
1954 /* Now really handle any of these signals
1955 that came in during this function. */
1956 if (sigchld_deferred
)
1957 kill (getpid (), SIGCHLD
);
1959 #endif /* ordinary USG */
1960 #endif /* not BSD4_1 */
1961 #endif /* SIGCHLD */
1962 #endif /* !POSIX_SIGNALS */
1964 /* Now generate the error if vfork failed. */
1966 report_file_error ("Doing vfork", Qnil
);
1968 #endif /* not VMS */
1973 /* Convert an internal struct sockaddr to a lisp object (vector or string).
1974 The address family of sa is not included in the result. */
1977 conv_sockaddr_to_lisp (sa
, len
)
1978 struct sockaddr
*sa
;
1981 Lisp_Object address
;
1984 register struct Lisp_Vector
*p
;
1986 switch (sa
->sa_family
)
1990 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
1991 len
= sizeof (sin
->sin_addr
) + 1;
1992 address
= Fmake_vector (make_number (len
), Qnil
);
1993 p
= XVECTOR (address
);
1994 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
1995 cp
= (unsigned char *)&sin
->sin_addr
;
1998 #ifdef HAVE_LOCAL_SOCKETS
2001 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2002 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2003 if (sockun
->sun_path
[i
] == 0)
2005 return make_unibyte_string (sockun
->sun_path
, i
);
2009 len
-= sizeof (sa
->sa_family
);
2010 address
= Fcons (make_number (sa
->sa_family
),
2011 Fmake_vector (make_number (len
), Qnil
));
2012 p
= XVECTOR (XCDR (address
));
2013 cp
= (unsigned char *) sa
+ sizeof (sa
->sa_family
);
2019 p
->contents
[i
++] = make_number (*cp
++);
2025 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2028 get_lisp_to_sockaddr_size (address
, familyp
)
2029 Lisp_Object address
;
2032 register struct Lisp_Vector
*p
;
2034 if (VECTORP (address
))
2036 p
= XVECTOR (address
);
2040 return sizeof (struct sockaddr_in
);
2043 #ifdef HAVE_LOCAL_SOCKETS
2044 else if (STRINGP (address
))
2046 *familyp
= AF_LOCAL
;
2047 return sizeof (struct sockaddr_un
);
2050 else if (CONSP (address
) && INTEGERP (XCAR (address
)) && VECTORP (XCDR (address
)))
2052 struct sockaddr
*sa
;
2053 *familyp
= XINT (XCAR (address
));
2054 p
= XVECTOR (XCDR (address
));
2055 return p
->size
+ sizeof (sa
->sa_family
);
2060 /* Convert an address object (vector or string) to an internal sockaddr.
2061 Format of address has already been validated by size_lisp_to_sockaddr. */
2064 conv_lisp_to_sockaddr (family
, address
, sa
, len
)
2066 Lisp_Object address
;
2067 struct sockaddr
*sa
;
2070 register struct Lisp_Vector
*p
;
2071 register unsigned char *cp
;
2075 sa
->sa_family
= family
;
2077 if (VECTORP (address
))
2079 p
= XVECTOR (address
);
2080 if (family
== AF_INET
)
2082 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2083 len
= sizeof (sin
->sin_addr
) + 1;
2084 i
= XINT (p
->contents
[--len
]);
2085 sin
->sin_port
= htons (i
);
2086 cp
= (unsigned char *)&sin
->sin_addr
;
2089 else if (STRINGP (address
))
2091 #ifdef HAVE_LOCAL_SOCKETS
2092 if (family
== AF_LOCAL
)
2094 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2095 cp
= XSTRING (address
)->data
;
2096 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2097 sockun
->sun_path
[i
] = *cp
++;
2104 p
= XVECTOR (XCDR (address
));
2105 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2108 for (i
= 0; i
< len
; i
++)
2109 if (INTEGERP (p
->contents
[i
]))
2110 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2113 #ifdef DATAGRAM_SOCKETS
2114 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2116 doc
: /* Get the current datagram address associated with PROCESS. */)
2118 Lisp_Object process
;
2122 CHECK_PROCESS (process
);
2124 if (!DATAGRAM_CONN_P (process
))
2127 channel
= XINT (XPROCESS (process
)->infd
);
2128 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2129 datagram_address
[channel
].len
);
2132 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2134 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2135 Returns nil upon error setting address, ADDRESS otherwise. */)
2137 Lisp_Object process
, address
;
2142 CHECK_PROCESS (process
);
2144 if (!DATAGRAM_CONN_P (process
))
2147 channel
= XINT (XPROCESS (process
)->infd
);
2149 len
= get_lisp_to_sockaddr_size (address
, &family
);
2150 if (datagram_address
[channel
].len
!= len
)
2152 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2158 static struct socket_options
{
2159 /* The name of this option. Should be lowercase version of option
2160 name without SO_ prefix. */
2162 /* Length of name. */
2164 /* Option level SOL_... */
2166 /* Option number SO_... */
2168 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_STR
, SOPT_LINGER
} opttype
;
2169 } socket_options
[] =
2171 #ifdef SO_BINDTODEVICE
2172 { "bindtodevice", 12, SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_STR
},
2175 { "broadcast", 9, SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
},
2178 { "dontroute", 9, SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
},
2181 { "keepalive", 9, SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
},
2184 { "linger", 6, SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
},
2187 { "oobinline", 9, SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
},
2190 { "priority", 8, SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
},
2193 { "reuseaddr", 9, SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
},
2195 { 0, 0, 0, 0, SOPT_UNKNOWN
}
2198 /* Process list of socket options OPTS on socket S.
2199 Only check if options are supported is S < 0.
2200 If NO_ERROR is non-zero, continue silently if an option
2203 Each element specifies one option. An element is either a string
2204 "OPTION=VALUE" or a cons (OPTION . VALUE) where OPTION is a string
2208 set_socket_options (s
, opts
, no_error
)
2214 opts
= Fcons (opts
, Qnil
);
2216 while (CONSP (opts
))
2221 struct socket_options
*sopt
;
2235 name
= (char *) XSTRING (opt
)->data
;
2236 else if (SYMBOLP (opt
))
2237 name
= (char *) XSYMBOL (opt
)->name
->data
;
2239 error ("Mal-formed option list");
2243 if (strncmp (name
, "no", 2) == 0)
2250 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2251 if (strncmp (name
, sopt
->name
, sopt
->nlen
) == 0)
2253 if (name
[sopt
->nlen
] == 0)
2255 if (name
[sopt
->nlen
] == '=')
2257 arg
= name
+ sopt
->nlen
+ 1;
2262 switch (sopt
->opttype
)
2270 optval
= (*arg
== '0' || *arg
== 'n') ? 0 : 1;
2271 else if (INTEGERP (val
))
2272 optval
= XINT (val
) == 0 ? 0 : 1;
2274 optval
= NILP (val
) ? 0 : 1;
2275 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2276 &optval
, sizeof (optval
));
2285 else if (INTEGERP (val
))
2286 optval
= XINT (val
);
2288 error ("Bad option argument for %s", name
);
2291 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2292 &optval
, sizeof (optval
));
2302 else if (STRINGP (val
))
2303 arg
= (char *) XSTRING (val
)->data
;
2304 else if (XSYMBOL (val
))
2305 arg
= (char *) XSYMBOL (val
)->name
->data
;
2307 error ("Invalid argument to %s option", name
);
2309 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2316 struct linger linger
;
2319 linger
.l_linger
= 0;
2326 if (*arg
== 'n' || *arg
== 't' || *arg
== 'y')
2327 linger
.l_onoff
= (*arg
== 'n') ? 0 : 1;
2329 linger
.l_linger
= atoi(arg
);
2331 else if (INTEGERP (val
))
2332 linger
.l_linger
= XINT (val
);
2334 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2335 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2336 &linger
, sizeof (linger
));
2345 error ("Unsupported option: %s", name
);
2347 if (ret
< 0 && ! no_error
)
2348 report_file_error ("Cannot set network option: %s", opt
);
2353 DEFUN ("set-network-process-options",
2354 Fset_network_process_options
, Sset_network_process_options
,
2356 doc
: /* Set one or more options for network process PROCESS.
2357 Each option is either a string "OPT=VALUE" or a cons (OPT . VALUE).
2358 A boolean value is false if it either zero or nil, true otherwise.
2360 The following options are known. Consult the relevant system manual
2361 pages for more information.
2363 bindtodevice=NAME -- bind to interface NAME, or remove binding if nil.
2364 broadcast=BOOL -- Allow send and receive of datagram broadcasts.
2365 dontroute=BOOL -- Only send to directly connected hosts.
2366 keepalive=BOOL -- Send keep-alive messages on network stream.
2367 linger=BOOL or TIMEOUT -- Send queued messages before closing.
2368 oobinline=BOOL -- Place out-of-band data in receive data stream.
2369 priority=INT -- Set protocol defined priority for sent packets.
2370 reuseaddr=BOOL -- Allow reusing a recently used address.
2372 usage: (set-network-process-options PROCESS &rest OPTIONS) */)
2377 Lisp_Object process
;
2381 CHECK_PROCESS (process
);
2382 if (nargs
> 1 && XINT (XPROCESS (process
)->infd
) >= 0)
2384 opts
= Flist (nargs
, args
);
2385 set_socket_options (XINT (XPROCESS (process
)->infd
), opts
, 0);
2390 /* A version of request_sigio suitable for a record_unwind_protect. */
2393 unwind_request_sigio (dummy
)
2396 if (interrupt_input
)
2401 /* Create a network stream/datagram client/server process. Treated
2402 exactly like a normal process when reading and writing. Primary
2403 differences are in status display and process deletion. A network
2404 connection has no PID; you cannot signal it. All you can do is
2405 stop/continue it and deactivate/close it via delete-process */
2407 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2409 doc
: /* Create and return a network server or client process.
2411 In Emacs, network connections are represented by process objects, so
2412 input and output work as for subprocesses and `delete-process' closes
2413 a network connection. However, a network process has no process id,
2414 it cannot be signalled, and the status codes are different from normal
2417 Arguments are specified as keyword/argument pairs. The following
2418 arguments are defined:
2420 :name NAME -- NAME is name for process. It is modified if necessary
2423 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2424 with the process. Process output goes at end of that buffer, unless
2425 you specify an output stream or filter function to handle the output.
2426 BUFFER may be also nil, meaning that this process is not associated
2429 :host HOST -- HOST is name of the host to connect to, or its IP
2430 address. The symbol `local' specifies the local host. If specified
2431 for a server process, it must be a valid name or address for the local
2432 host, and only clients connecting to that address will be accepted.
2434 :service SERVICE -- SERVICE is name of the service desired, or an
2435 integer specifying a port number to connect to. If SERVICE is t,
2436 a random port number is selected for the server.
2438 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2439 stream type connection, `datagram' creates a datagram type connection.
2441 :family FAMILY -- FAMILY is the address (and protocol) family for the
2442 service specified by HOST and SERVICE. The default address family is
2443 Inet (or IPv4) for the host and port number specified by HOST and
2444 SERVICE. Other address families supported are:
2445 local -- for a local (i.e. UNIX) address specified by SERVICE.
2447 :local ADDRESS -- ADDRESS is the local address used for the connection.
2448 This parameter is ignored when opening a client process. When specified
2449 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2451 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2452 connection. This parameter is ignored when opening a stream server
2453 process. For a datagram server process, it specifies the initial
2454 setting of the remote datagram address. When specified for a client
2455 process, the FAMILY, HOST, and SERVICE args are ignored.
2457 The format of ADDRESS depends on the address family:
2458 - An IPv4 address is represented as an vector of integers [A B C D P]
2459 corresponding to numeric IP address A.B.C.D and port number P.
2460 - A local address is represented as a string with the address in the
2461 local address space.
2462 - An "unsupported family" address is represented by a cons (F . AV)
2463 where F is the family number and AV is a vector containing the socket
2464 address data with one element per address data byte. Do not rely on
2465 this format in portable code, as it may depend on implementation
2466 defined constants, data sizes, and data structure alignment.
2468 :coding CODING -- CODING is coding system for this process.
2470 :options OPTIONS -- Set the specified options for the network process.
2471 See `set-network-process-options' for details.
2473 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2474 return without waiting for the connection to complete; instead, the
2475 sentinel function will be called with second arg matching "open" (if
2476 successful) or "failed" when the connect completes. Default is to use
2477 a blocking connect (i.e. wait) for stream type connections.
2479 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2480 running when emacs is exited.
2482 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2483 In the stopped state, a server process does not accept new
2484 connections, and a client process does not handle incoming traffic.
2485 The stopped state is cleared by `continue-process' and set by
2488 :filter FILTER -- Install FILTER as the process filter.
2490 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2492 :log LOG -- Install LOG as the server process log function. This
2493 function is called as when the server accepts a network connection from a
2494 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2495 is the server process, CLIENT is the new process for the connection,
2496 and MESSAGE is a string.
2498 :server BOOL -- if BOOL is non-nil, create a server process for the
2499 specified FAMILY, SERVICE, and connection type (stream or datagram).
2500 Default is a client process.
2502 A server process will listen for and accept connections from
2503 clients. When a client connection is accepted, a new network process
2504 is created for the connection with the following parameters:
2505 - The client's process name is constructed by concatenating the server
2506 process' NAME and a client identification string.
2507 - If the FILTER argument is non-nil, the client process will not get a
2508 separate process buffer; otherwise, the client's process buffer is a newly
2509 created buffer named after the server process' BUFFER name or process
2510 NAME concatenated with the client identification string.
2511 - The connection type and the process filter and sentinel parameters are
2512 inherited from the server process' TYPE, FILTER and SENTINEL.
2513 - The client process' contact info is set according to the client's
2514 addressing information (typically an IP address and a port number).
2516 Notice that the FILTER and SENTINEL args are never used directly by
2517 the server process. Also, the BUFFER argument is not used directly by
2518 the server process, but via `network-server-log-function' hook, a log
2519 of the accepted (and failed) connections may be recorded in the server
2522 usage: (make-network-process &rest ARGS) */)
2528 Lisp_Object contact
;
2529 struct Lisp_Process
*p
;
2530 #ifdef HAVE_GETADDRINFO
2531 struct addrinfo ai
, *res
, *lres
;
2532 struct addrinfo hints
;
2533 char *portstring
, portbuf
[128];
2534 #else /* HAVE_GETADDRINFO */
2535 struct _emacs_addrinfo
2541 struct sockaddr
*ai_addr
;
2542 struct _emacs_addrinfo
*ai_next
;
2544 #endif /* HAVE_GETADDRINFO */
2545 struct sockaddr_in address_in
;
2546 #ifdef HAVE_LOCAL_SOCKETS
2547 struct sockaddr_un address_un
;
2552 int s
= -1, outch
, inch
;
2553 struct gcpro gcpro1
;
2555 int count
= specpdl_ptr
- specpdl
;
2557 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2559 Lisp_Object name
, buffer
, host
, service
, address
;
2560 Lisp_Object filter
, sentinel
;
2561 int is_non_blocking_client
= 0;
2569 /* Save arguments for process-contact and clone-process. */
2570 contact
= Flist (nargs
, args
);
2574 /* Ensure socket support is loaded if available. */
2575 init_winsock (TRUE
);
2578 /* :type TYPE (nil: stream, datagram */
2579 tem
= Fplist_get (contact
, QCtype
);
2581 socktype
= SOCK_STREAM
;
2582 #ifdef DATAGRAM_SOCKETS
2583 else if (EQ (tem
, Qdatagram
))
2584 socktype
= SOCK_DGRAM
;
2587 error ("Unsupported connection type");
2590 tem
= Fplist_get (contact
, QCserver
);
2594 error ("Network servers not supported");
2600 /* Make QCaddress an alias for :local (server) or :remote (client). */
2601 QCaddress
= is_server
? QClocal
: QCremote
;
2604 if (!is_server
&& socktype
== SOCK_STREAM
2605 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2607 #ifndef NON_BLOCKING_CONNECT
2608 error ("Non-blocking connect not supported");
2610 is_non_blocking_client
= 1;
2614 name
= Fplist_get (contact
, QCname
);
2615 buffer
= Fplist_get (contact
, QCbuffer
);
2616 filter
= Fplist_get (contact
, QCfilter
);
2617 sentinel
= Fplist_get (contact
, QCsentinel
);
2619 CHECK_STRING (name
);
2622 /* Let's handle TERM before things get complicated ... */
2623 host
= Fplist_get (contact
, QChost
);
2624 CHECK_STRING (host
);
2626 service
= Fplist_get (contact
, QCservice
);
2627 if (INTEGERP (service
))
2628 port
= htons ((unsigned short) XINT (service
));
2631 struct servent
*svc_info
;
2632 CHECK_STRING (service
);
2633 svc_info
= getservbyname (XSTRING (service
)->data
, "tcp");
2635 error ("Unknown service: %s", XSTRING (service
)->data
);
2636 port
= svc_info
->s_port
;
2639 s
= connect_server (0);
2641 report_file_error ("error creating socket", Fcons (name
, Qnil
));
2642 send_command (s
, C_PORT
, 0, "%s:%d", XSTRING (host
)->data
, ntohs (port
));
2643 send_command (s
, C_DUMB
, 1, 0);
2645 #else /* not TERM */
2647 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2648 ai
.ai_socktype
= socktype
;
2653 /* :local ADDRESS or :remote ADDRESS */
2654 address
= Fplist_get (contact
, QCaddress
);
2655 if (!NILP (address
))
2657 host
= service
= Qnil
;
2659 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
2660 error ("Malformed :address");
2661 ai
.ai_family
= family
;
2662 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
2663 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
2667 /* :family FAMILY -- nil (for Inet), local, or integer. */
2668 tem
= Fplist_get (contact
, QCfamily
);
2670 family
= XINT (tem
);
2675 #ifdef HAVE_LOCAL_SOCKETS
2676 else if (EQ (tem
, Qlocal
))
2681 error ("Unknown address family");
2682 ai
.ai_family
= family
;
2684 /* :service SERVICE -- string, integer (port number), or t (random port). */
2685 service
= Fplist_get (contact
, QCservice
);
2687 #ifdef HAVE_LOCAL_SOCKETS
2688 if (family
== AF_LOCAL
)
2690 /* Host is not used. */
2692 CHECK_STRING (service
);
2693 bzero (&address_un
, sizeof address_un
);
2694 address_un
.sun_family
= AF_LOCAL
;
2695 strncpy (address_un
.sun_path
, XSTRING (service
)->data
, sizeof address_un
.sun_path
);
2696 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
2697 ai
.ai_addrlen
= sizeof address_un
;
2702 /* :host HOST -- hostname, ip address, or 'local for localhost. */
2703 host
= Fplist_get (contact
, QChost
);
2706 if (EQ (host
, Qlocal
))
2707 host
= build_string ("localhost");
2708 CHECK_STRING (host
);
2711 /* Slow down polling to every ten seconds.
2712 Some kernels have a bug which causes retrying connect to fail
2713 after a connect. Polling can interfere with gethostbyname too. */
2714 #ifdef POLL_FOR_INPUT
2715 if (socktype
== SOCK_STREAM
)
2717 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
2718 bind_polling_period (10);
2722 #ifdef HAVE_GETADDRINFO
2723 /* If we have a host, use getaddrinfo to resolve both host and service.
2724 Otherwise, use getservbyname to lookup the service. */
2728 /* SERVICE can either be a string or int.
2729 Convert to a C string for later use by getaddrinfo. */
2730 if (EQ (service
, Qt
))
2732 else if (INTEGERP (service
))
2734 sprintf (portbuf
, "%ld", (long) XINT (service
));
2735 portstring
= portbuf
;
2739 CHECK_STRING (service
);
2740 portstring
= XSTRING (service
)->data
;
2745 memset (&hints
, 0, sizeof (hints
));
2747 hints
.ai_family
= NILP (Fplist_member (contact
, QCfamily
)) ? AF_UNSPEC
: family
;
2748 hints
.ai_socktype
= socktype
;
2749 hints
.ai_protocol
= 0;
2750 ret
= getaddrinfo (XSTRING (host
)->data
, portstring
, &hints
, &res
);
2752 #ifdef HAVE_GAI_STRERROR
2753 error ("%s/%s %s", XSTRING (host
)->data
, portstring
, gai_strerror(ret
));
2755 error ("%s/%s getaddrinfo error %d", XSTRING (host
)->data
, portstring
, ret
);
2761 #endif /* HAVE_GETADDRINFO */
2763 /* We end up here if getaddrinfo is not defined, or in case no hostname
2764 has been specified (e.g. for a local server process). */
2766 if (EQ (service
, Qt
))
2768 else if (INTEGERP (service
))
2769 port
= htons ((unsigned short) XINT (service
));
2772 struct servent
*svc_info
;
2773 CHECK_STRING (service
);
2774 svc_info
= getservbyname (XSTRING (service
)->data
,
2775 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
2777 error ("Unknown service: %s", XSTRING (service
)->data
);
2778 port
= svc_info
->s_port
;
2781 bzero (&address_in
, sizeof address_in
);
2782 address_in
.sin_family
= family
;
2783 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
2784 address_in
.sin_port
= port
;
2786 #ifndef HAVE_GETADDRINFO
2789 struct hostent
*host_info_ptr
;
2791 /* gethostbyname may fail with TRY_AGAIN, but we don't honour that,
2792 as it may `hang' emacs for a very long time. */
2795 host_info_ptr
= gethostbyname (XSTRING (host
)->data
);
2800 bcopy (host_info_ptr
->h_addr
, (char *) &address_in
.sin_addr
,
2801 host_info_ptr
->h_length
);
2802 family
= host_info_ptr
->h_addrtype
;
2803 address_in
.sin_family
= family
;
2806 /* Attempt to interpret host as numeric inet address */
2808 IN_ADDR numeric_addr
;
2809 numeric_addr
= inet_addr ((char *) XSTRING (host
)->data
);
2810 if (NUMERIC_ADDR_ERROR
)
2811 error ("Unknown host \"%s\"", XSTRING (host
)->data
);
2813 bcopy ((char *)&numeric_addr
, (char *) &address_in
.sin_addr
,
2814 sizeof (address_in
.sin_addr
));
2818 #endif /* not HAVE_GETADDRINFO */
2820 ai
.ai_family
= family
;
2821 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
2822 ai
.ai_addrlen
= sizeof address_in
;
2826 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
2827 when connect is interrupted. So let's not let it get interrupted.
2828 Note we do not turn off polling, because polling is only used
2829 when not interrupt_input, and thus not normally used on the systems
2830 which have this bug. On systems which use polling, there's no way
2831 to quit if polling is turned off. */
2833 && !is_server
&& socktype
== SOCK_STREAM
)
2835 /* Comment from KFS: The original open-network-stream code
2836 didn't unwind protect this, but it seems like the proper
2837 thing to do. In any case, I don't see how it could harm to
2838 do this -- and it makes cleanup (using unbind_to) easier. */
2839 record_unwind_protect (unwind_request_sigio
, Qnil
);
2843 /* Do this in case we never enter the for-loop below. */
2844 count1
= specpdl_ptr
- specpdl
;
2847 for (lres
= res
; lres
; lres
= lres
->ai_next
)
2849 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
2856 #ifdef DATAGRAM_SOCKETS
2857 if (!is_server
&& socktype
== SOCK_DGRAM
)
2859 #endif /* DATAGRAM_SOCKETS */
2861 #ifdef NON_BLOCKING_CONNECT
2862 if (is_non_blocking_client
)
2865 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
2867 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
2879 /* Make us close S if quit. */
2880 record_unwind_protect (close_file_unwind
, make_number (s
));
2884 /* Configure as a server socket. */
2885 #ifdef HAVE_LOCAL_SOCKETS
2886 if (family
!= AF_LOCAL
)
2890 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
2891 report_file_error ("Cannot set reuse option on server socket.", Qnil
);
2894 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
2895 report_file_error ("Cannot bind server socket", Qnil
);
2897 #ifdef HAVE_GETSOCKNAME
2898 if (EQ (service
, Qt
))
2900 struct sockaddr_in sa1
;
2901 int len1
= sizeof (sa1
);
2902 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
2904 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
2905 service
= make_number (sa1
.sin_port
);
2906 contact
= Fplist_put (contact
, QCservice
, service
);
2911 if (socktype
== SOCK_STREAM
&& listen (s
, 5))
2912 report_file_error ("Cannot listen on server socket", Qnil
);
2922 /* This turns off all alarm-based interrupts; the
2923 bind_polling_period call above doesn't always turn all the
2924 short-interval ones off, especially if interrupt_input is
2927 It'd be nice to be able to control the connect timeout
2928 though. Would non-blocking connect calls be portable?
2930 This used to be conditioned by HAVE_GETADDRINFO. Why? */
2932 turn_on_atimers (0);
2934 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
2937 turn_on_atimers (1);
2939 if (ret
== 0 || xerrno
== EISCONN
)
2941 /* The unwind-protect will be discarded afterwards.
2942 Likewise for immediate_quit. */
2946 #ifdef NON_BLOCKING_CONNECT
2948 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
2952 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
2960 if (xerrno
== EINTR
)
2962 if (xerrno
== EADDRINUSE
&& retry
< 20)
2964 /* A delay here is needed on some FreeBSD systems,
2965 and it is harmless, since this retrying takes time anyway
2966 and should be infrequent. */
2967 Fsleep_for (make_number (1), Qnil
);
2972 /* Discard the unwind protect closing S. */
2973 specpdl_ptr
= specpdl
+ count1
;
2980 #ifdef DATAGRAM_SOCKETS
2981 if (socktype
== SOCK_DGRAM
)
2983 if (datagram_address
[s
].sa
)
2985 datagram_address
[s
].sa
= (struct sockaddr
*) xmalloc (lres
->ai_addrlen
);
2986 datagram_address
[s
].len
= lres
->ai_addrlen
;
2990 bzero (datagram_address
[s
].sa
, lres
->ai_addrlen
);
2991 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
2994 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
2995 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
2996 conv_lisp_to_sockaddr (rfamily
, remote
,
2997 datagram_address
[s
].sa
, rlen
);
3001 bcopy (lres
->ai_addr
, datagram_address
[s
].sa
, lres
->ai_addrlen
);
3004 contact
= Fplist_put (contact
, QCaddress
,
3005 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3008 #ifdef HAVE_GETADDRINFO
3015 /* Discard the unwind protect for closing S, if any. */
3016 specpdl_ptr
= specpdl
+ count1
;
3018 /* Unwind bind_polling_period and request_sigio. */
3019 unbind_to (count
, Qnil
);
3023 /* If non-blocking got this far - and failed - assume non-blocking is
3024 not supported after all. This is probably a wrong assumption, but
3025 the normal blocking calls to open-network-stream handles this error
3027 if (is_non_blocking_client
)
3032 report_file_error ("make server process failed", contact
);
3034 report_file_error ("make client process failed", contact
);
3037 tem
= Fplist_get (contact
, QCoptions
);
3039 set_socket_options (s
, tem
, 1);
3041 #endif /* not TERM */
3047 buffer
= Fget_buffer_create (buffer
);
3048 proc
= make_process (name
);
3050 chan_process
[inch
] = proc
;
3053 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3056 fcntl (inch
, F_SETFL
, O_NDELAY
);
3060 p
= XPROCESS (proc
);
3062 p
->childp
= contact
;
3064 p
->sentinel
= sentinel
;
3066 p
->log
= Fplist_get (contact
, QClog
);
3067 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3068 p
->kill_without_query
= Qt
;
3069 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3072 XSETINT (p
->infd
, inch
);
3073 XSETINT (p
->outfd
, outch
);
3074 if (is_server
&& socktype
== SOCK_STREAM
)
3075 p
->status
= Qlisten
;
3077 #ifdef NON_BLOCKING_CONNECT
3078 if (is_non_blocking_client
)
3080 /* We may get here if connect did succeed immediately. However,
3081 in that case, we still need to signal this like a non-blocking
3083 p
->status
= Qconnect
;
3084 if (!FD_ISSET (inch
, &connect_wait_mask
))
3086 FD_SET (inch
, &connect_wait_mask
);
3087 num_pending_connects
++;
3092 /* A server may have a client filter setting of Qt, but it must
3093 still listen for incoming connects unless it is stopped. */
3094 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3095 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3097 FD_SET (inch
, &input_wait_mask
);
3098 FD_SET (inch
, &non_keyboard_wait_mask
);
3101 if (inch
> max_process_desc
)
3102 max_process_desc
= inch
;
3104 tem
= Fplist_member (contact
, QCcoding
);
3105 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3106 tem
= Qnil
; /* No error message (too late!). */
3109 /* Setup coding systems for communicating with the network stream. */
3110 struct gcpro gcpro1
;
3111 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3112 Lisp_Object coding_systems
= Qt
;
3113 Lisp_Object args
[5], val
;
3116 val
= XCAR (XCDR (tem
));
3117 else if (!NILP (Vcoding_system_for_read
))
3118 val
= Vcoding_system_for_read
;
3119 else if ((!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
))
3120 || (NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
)))
3121 /* We dare not decode end-of-line format by setting VAL to
3122 Qraw_text, because the existing Emacs Lisp libraries
3123 assume that they receive bare code including a sequene of
3128 args
[0] = Qopen_network_stream
, args
[1] = name
,
3129 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3131 coding_systems
= Ffind_operation_coding_system (5, args
);
3133 if (CONSP (coding_systems
))
3134 val
= XCAR (coding_systems
);
3135 else if (CONSP (Vdefault_process_coding_system
))
3136 val
= XCAR (Vdefault_process_coding_system
);
3140 p
->decode_coding_system
= val
;
3143 val
= XCAR (XCDR (tem
));
3144 else if (!NILP (Vcoding_system_for_write
))
3145 val
= Vcoding_system_for_write
;
3146 else if (NILP (current_buffer
->enable_multibyte_characters
))
3150 if (EQ (coding_systems
, Qt
))
3152 args
[0] = Qopen_network_stream
, args
[1] = name
,
3153 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3155 coding_systems
= Ffind_operation_coding_system (5, args
);
3158 if (CONSP (coding_systems
))
3159 val
= XCDR (coding_systems
);
3160 else if (CONSP (Vdefault_process_coding_system
))
3161 val
= XCDR (Vdefault_process_coding_system
);
3165 p
->encode_coding_system
= val
;
3168 if (!proc_decode_coding_system
[inch
])
3169 proc_decode_coding_system
[inch
]
3170 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
3171 setup_coding_system (p
->decode_coding_system
,
3172 proc_decode_coding_system
[inch
]);
3173 if (!proc_encode_coding_system
[outch
])
3174 proc_encode_coding_system
[outch
]
3175 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
3176 setup_coding_system (p
->encode_coding_system
,
3177 proc_encode_coding_system
[outch
]);
3179 p
->decoding_buf
= make_uninit_string (0);
3180 p
->decoding_carryover
= make_number (0);
3181 p
->encoding_buf
= make_uninit_string (0);
3182 p
->encoding_carryover
= make_number (0);
3184 p
->inherit_coding_system_flag
3185 = (!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
3191 #endif /* HAVE_SOCKETS */
3194 deactivate_process (proc
)
3197 register int inchannel
, outchannel
;
3198 register struct Lisp_Process
*p
= XPROCESS (proc
);
3200 inchannel
= XINT (p
->infd
);
3201 outchannel
= XINT (p
->outfd
);
3205 /* Beware SIGCHLD hereabouts. */
3206 flush_pending_output (inchannel
);
3209 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
3210 sys$
dassgn (outchannel
);
3211 vs
= get_vms_process_pointer (p
->pid
);
3213 give_back_vms_process_stuff (vs
);
3216 emacs_close (inchannel
);
3217 if (outchannel
>= 0 && outchannel
!= inchannel
)
3218 emacs_close (outchannel
);
3221 XSETINT (p
->infd
, -1);
3222 XSETINT (p
->outfd
, -1);
3223 #ifdef DATAGRAM_SOCKETS
3224 if (DATAGRAM_CHAN_P (inchannel
))
3226 xfree (datagram_address
[inchannel
].sa
);
3227 datagram_address
[inchannel
].sa
= 0;
3228 datagram_address
[inchannel
].len
= 0;
3231 chan_process
[inchannel
] = Qnil
;
3232 FD_CLR (inchannel
, &input_wait_mask
);
3233 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3234 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3236 FD_CLR (inchannel
, &connect_wait_mask
);
3237 if (--num_pending_connects
< 0)
3240 if (inchannel
== max_process_desc
)
3243 /* We just closed the highest-numbered process input descriptor,
3244 so recompute the highest-numbered one now. */
3245 max_process_desc
= 0;
3246 for (i
= 0; i
< MAXDESC
; i
++)
3247 if (!NILP (chan_process
[i
]))
3248 max_process_desc
= i
;
3253 /* Close all descriptors currently in use for communication
3254 with subprocess. This is used in a newly-forked subprocess
3255 to get rid of irrelevant descriptors. */
3258 close_process_descs ()
3262 for (i
= 0; i
< MAXDESC
; i
++)
3264 Lisp_Object process
;
3265 process
= chan_process
[i
];
3266 if (!NILP (process
))
3268 int in
= XINT (XPROCESS (process
)->infd
);
3269 int out
= XINT (XPROCESS (process
)->outfd
);
3272 if (out
>= 0 && in
!= out
)
3279 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3281 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3282 It is read into the process' buffers or given to their filter functions.
3283 Non-nil arg PROCESS means do not return until some output has been received
3285 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of
3286 seconds and microseconds to wait; return after that much time whether
3287 or not there is input.
3288 Return non-nil iff we received any output before the timeout expired. */)
3289 (process
, timeout
, timeout_msecs
)
3290 register Lisp_Object process
, timeout
, timeout_msecs
;
3295 if (! NILP (process
))
3296 CHECK_PROCESS (process
);
3298 if (! NILP (timeout_msecs
))
3300 CHECK_NUMBER (timeout_msecs
);
3301 useconds
= XINT (timeout_msecs
);
3302 if (!INTEGERP (timeout
))
3303 XSETINT (timeout
, 0);
3306 int carry
= useconds
/ 1000000;
3308 XSETINT (timeout
, XINT (timeout
) + carry
);
3309 useconds
-= carry
* 1000000;
3311 /* I think this clause is necessary because C doesn't
3312 guarantee a particular rounding direction for negative
3316 XSETINT (timeout
, XINT (timeout
) - 1);
3317 useconds
+= 1000000;
3324 if (! NILP (timeout
))
3326 CHECK_NUMBER (timeout
);
3327 seconds
= XINT (timeout
);
3328 if (seconds
< 0 || (seconds
== 0 && useconds
== 0))
3340 XSETFASTINT (process
, 0);
3343 (wait_reading_process_input (seconds
, useconds
, process
, 0)
3347 /* Accept a connection for server process SERVER on CHANNEL. */
3349 static int connect_counter
= 0;
3352 server_accept_connection (server
, channel
)
3356 Lisp_Object proc
, caller
, name
, buffer
;
3357 Lisp_Object contact
, host
, service
;
3358 struct Lisp_Process
*ps
= XPROCESS (server
);
3359 struct Lisp_Process
*p
;
3363 struct sockaddr_in in
;
3364 #ifdef HAVE_LOCAL_SOCKETS
3365 struct sockaddr_un un
;
3368 int len
= sizeof saddr
;
3370 s
= accept (channel
, &saddr
.sa
, &len
);
3379 if (code
== EWOULDBLOCK
)
3383 if (!NILP (ps
->log
))
3384 call3 (ps
->log
, server
, Qnil
,
3385 concat3 (build_string ("accept failed with code"),
3386 Fnumber_to_string (make_number (code
)),
3387 build_string ("\n")));
3393 /* Setup a new process to handle the connection. */
3395 /* Generate a unique identification of the caller, and build contact
3396 information for this process. */
3399 switch (saddr
.sa
.sa_family
)
3403 Lisp_Object args
[5];
3404 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
3405 args
[0] = build_string ("%d.%d.%d.%d");
3406 args
[1] = make_number (*ip
++);
3407 args
[2] = make_number (*ip
++);
3408 args
[3] = make_number (*ip
++);
3409 args
[4] = make_number (*ip
++);
3410 host
= Fformat (5, args
);
3411 service
= make_number (ntohs (saddr
.in
.sin_port
));
3413 args
[0] = build_string (" <%s:%d>");
3416 caller
= Fformat (3, args
);
3420 #ifdef HAVE_LOCAL_SOCKETS
3424 caller
= Fnumber_to_string (make_number (connect_counter
));
3425 caller
= concat3 (build_string (" <*"), caller
, build_string ("*>"));
3429 /* Create a new buffer name for this process if it doesn't have a
3430 filter. The new buffer name is based on the buffer name or
3431 process name of the server process concatenated with the caller
3434 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
3438 buffer
= ps
->buffer
;
3440 buffer
= Fbuffer_name (buffer
);
3445 buffer
= concat2 (buffer
, caller
);
3446 buffer
= Fget_buffer_create (buffer
);
3450 /* Generate a unique name for the new server process. Combine the
3451 server process name with the caller identification. */
3453 name
= concat2 (ps
->name
, caller
);
3454 proc
= make_process (name
);
3456 chan_process
[s
] = proc
;
3459 fcntl (s
, F_SETFL
, O_NONBLOCK
);
3462 fcntl (s
, F_SETFL
, O_NDELAY
);
3466 p
= XPROCESS (proc
);
3468 /* Build new contact information for this setup. */
3469 contact
= Fcopy_sequence (ps
->childp
);
3470 contact
= Fplist_put (contact
, QCserver
, Qnil
);
3471 contact
= Fplist_put (contact
, QChost
, host
);
3472 if (!NILP (service
))
3473 contact
= Fplist_put (contact
, QCservice
, service
);
3474 contact
= Fplist_put (contact
, QCremote
,
3475 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
3476 #ifdef HAVE_GETSOCKNAME
3478 if (getsockname (channel
, &saddr
.sa
, &len
) == 0)
3479 contact
= Fplist_put (contact
, QClocal
,
3480 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
3483 p
->childp
= contact
;
3485 p
->sentinel
= ps
->sentinel
;
3486 p
->filter
= ps
->filter
;
3489 XSETINT (p
->infd
, s
);
3490 XSETINT (p
->outfd
, s
);
3493 /* Client processes for accepted connections are not stopped initially. */
3494 if (!EQ (p
->filter
, Qt
))
3496 FD_SET (s
, &input_wait_mask
);
3497 FD_SET (s
, &non_keyboard_wait_mask
);
3500 if (s
> max_process_desc
)
3501 max_process_desc
= s
;
3503 /* Setup coding system for new process based on server process.
3504 This seems to be the proper thing to do, as the coding system
3505 of the new process should reflect the settings at the time the
3506 server socket was opened; not the current settings. */
3508 p
->decode_coding_system
= ps
->decode_coding_system
;
3509 p
->encode_coding_system
= ps
->encode_coding_system
;
3511 if (!proc_decode_coding_system
[s
])
3512 proc_decode_coding_system
[s
]
3513 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
3514 setup_coding_system (p
->decode_coding_system
,
3515 proc_decode_coding_system
[s
]);
3516 if (!proc_encode_coding_system
[s
])
3517 proc_encode_coding_system
[s
]
3518 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
3519 setup_coding_system (p
->encode_coding_system
,
3520 proc_encode_coding_system
[s
]);
3522 p
->decoding_buf
= make_uninit_string (0);
3523 p
->decoding_carryover
= make_number (0);
3524 p
->encoding_buf
= make_uninit_string (0);
3525 p
->encoding_carryover
= make_number (0);
3527 p
->inherit_coding_system_flag
3528 = (NILP (buffer
) ? Qnil
: ps
->inherit_coding_system_flag
);
3530 if (!NILP (ps
->log
))
3531 call3 (ps
->log
, server
, proc
,
3532 concat3 (build_string ("accept from "),
3533 (STRINGP (host
) ? host
: build_string ("-")),
3534 build_string ("\n")));
3536 if (!NILP (p
->sentinel
))
3537 exec_sentinel (proc
,
3538 concat3 (build_string ("open from "),
3539 (STRINGP (host
) ? host
: build_string ("-")),
3540 build_string ("\n")));
3543 /* This variable is different from waiting_for_input in keyboard.c.
3544 It is used to communicate to a lisp process-filter/sentinel (via the
3545 function Fwaiting_for_user_input_p below) whether emacs was waiting
3546 for user-input when that process-filter was called.
3547 waiting_for_input cannot be used as that is by definition 0 when
3548 lisp code is being evalled.
3549 This is also used in record_asynch_buffer_change.
3550 For that purpose, this must be 0
3551 when not inside wait_reading_process_input. */
3552 static int waiting_for_user_input_p
;
3554 /* This is here so breakpoints can be put on it. */
3556 wait_reading_process_input_1 ()
3560 /* Read and dispose of subprocess output while waiting for timeout to
3561 elapse and/or keyboard input to be available.
3564 timeout in seconds, or
3565 zero for no limit, or
3566 -1 means gobble data immediately available but don't wait for any.
3569 an additional duration to wait, measured in microseconds.
3570 If this is nonzero and time_limit is 0, then the timeout
3571 consists of MICROSECS only.
3573 READ_KBD is a lisp value:
3574 0 to ignore keyboard input, or
3575 1 to return when input is available, or
3576 -1 meaning caller will actually read the input, so don't throw to
3577 the quit handler, or
3578 a cons cell, meaning wait until its car is non-nil
3579 (and gobble terminal input into the buffer if any arrives), or
3580 a process object, meaning wait until something arrives from that
3581 process. The return value is true iff we read some input from
3584 DO_DISPLAY != 0 means redisplay should be done to show subprocess
3585 output that arrives.
3587 If READ_KBD is a pointer to a struct Lisp_Process, then the
3588 function returns true iff we received input from that process
3589 before the timeout elapsed.
3590 Otherwise, return true iff we received input from any process. */
3593 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
3594 int time_limit
, microsecs
;
3595 Lisp_Object read_kbd
;
3598 register int channel
, nfds
;
3599 static SELECT_TYPE Available
;
3600 static SELECT_TYPE Connecting
;
3601 int check_connect
, no_avail
;
3604 EMACS_TIME timeout
, end_time
;
3605 int wait_channel
= -1;
3606 struct Lisp_Process
*wait_proc
= 0;
3607 int got_some_input
= 0;
3608 /* Either nil or a cons cell, the car of which is of interest and
3609 may be changed outside of this routine. */
3610 Lisp_Object wait_for_cell
= Qnil
;
3612 FD_ZERO (&Available
);
3613 FD_ZERO (&Connecting
);
3615 /* If read_kbd is a process to watch, set wait_proc and wait_channel
3617 if (PROCESSP (read_kbd
))
3619 wait_proc
= XPROCESS (read_kbd
);
3620 wait_channel
= XINT (wait_proc
->infd
);
3621 XSETFASTINT (read_kbd
, 0);
3624 /* If waiting for non-nil in a cell, record where. */
3625 if (CONSP (read_kbd
))
3627 wait_for_cell
= read_kbd
;
3628 XSETFASTINT (read_kbd
, 0);
3631 waiting_for_user_input_p
= XINT (read_kbd
);
3633 /* Since we may need to wait several times,
3634 compute the absolute time to return at. */
3635 if (time_limit
|| microsecs
)
3637 EMACS_GET_TIME (end_time
);
3638 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
3639 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
3642 /* AlainF 5-Jul-1996
3643 HP-UX 10.10 seem to have problems with signals coming in
3644 Causes "poll: interrupted system call" messages when Emacs is run
3646 Turn off periodic alarms (in case they are in use) */
3647 turn_on_atimers (0);
3652 int timeout_reduced_for_timers
= 0;
3654 /* If calling from keyboard input, do not quit
3655 since we want to return C-g as an input character.
3656 Otherwise, do pending quit if requested. */
3657 if (XINT (read_kbd
) >= 0)
3660 /* Exit now if the cell we're waiting for became non-nil. */
3661 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
3664 /* Compute time from now till when time limit is up */
3665 /* Exit if already run out */
3666 if (time_limit
== -1)
3668 /* -1 specified for timeout means
3669 gobble output available now
3670 but don't wait at all. */
3672 EMACS_SET_SECS_USECS (timeout
, 0, 0);
3674 else if (time_limit
|| microsecs
)
3676 EMACS_GET_TIME (timeout
);
3677 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
3678 if (EMACS_TIME_NEG_P (timeout
))
3683 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
3686 /* Normally we run timers here.
3687 But not if wait_for_cell; in those cases,
3688 the wait is supposed to be short,
3689 and those callers cannot handle running arbitrary Lisp code here. */
3690 if (NILP (wait_for_cell
))
3692 EMACS_TIME timer_delay
;
3696 int old_timers_run
= timers_run
;
3697 struct buffer
*old_buffer
= current_buffer
;
3699 timer_delay
= timer_check (1);
3701 /* If a timer has run, this might have changed buffers
3702 an alike. Make read_key_sequence aware of that. */
3703 if (timers_run
!= old_timers_run
3704 && old_buffer
!= current_buffer
3705 && waiting_for_user_input_p
== -1)
3706 record_asynch_buffer_change ();
3708 if (timers_run
!= old_timers_run
&& do_display
)
3709 /* We must retry, since a timer may have requeued itself
3710 and that could alter the time_delay. */
3711 redisplay_preserve_echo_area (9);
3715 while (!detect_input_pending ());
3717 /* If there is unread keyboard input, also return. */
3718 if (XINT (read_kbd
) != 0
3719 && requeued_events_pending_p ())
3722 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
3724 EMACS_TIME difference
;
3725 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
3726 if (EMACS_TIME_NEG_P (difference
))
3728 timeout
= timer_delay
;
3729 timeout_reduced_for_timers
= 1;
3732 /* If time_limit is -1, we are not going to wait at all. */
3733 else if (time_limit
!= -1)
3735 /* This is so a breakpoint can be put here. */
3736 wait_reading_process_input_1 ();
3740 /* Cause C-g and alarm signals to take immediate action,
3741 and cause input available signals to zero out timeout.
3743 It is important that we do this before checking for process
3744 activity. If we get a SIGCHLD after the explicit checks for
3745 process activity, timeout is the only way we will know. */
3746 if (XINT (read_kbd
) < 0)
3747 set_waiting_for_input (&timeout
);
3749 /* If status of something has changed, and no input is
3750 available, notify the user of the change right away. After
3751 this explicit check, we'll let the SIGCHLD handler zap
3752 timeout to get our attention. */
3753 if (update_tick
!= process_tick
&& do_display
)
3755 SELECT_TYPE Atemp
, Ctemp
;
3757 Atemp
= input_wait_mask
;
3759 /* On Mac OS X, the SELECT system call always says input is
3760 present (for reading) at stdin, even when none is. This
3761 causes the the call to SELECT below to return 1 and
3762 status_notify not to be called. As a result output of
3763 subprocesses are incorrectly discarded. */
3766 Ctemp
= connect_wait_mask
;
3767 EMACS_SET_SECS_USECS (timeout
, 0, 0);
3768 if ((select (max (max_process_desc
, max_keyboard_desc
) + 1,
3770 (num_pending_connects
> 0 ? &Ctemp
: (SELECT_TYPE
*)0),
3771 (SELECT_TYPE
*)0, &timeout
)
3774 /* It's okay for us to do this and then continue with
3775 the loop, since timeout has already been zeroed out. */
3776 clear_waiting_for_input ();
3781 /* Don't wait for output from a non-running process. Just
3782 read whatever data has already been received. */
3783 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
3784 update_status (wait_proc
);
3786 && ! EQ (wait_proc
->status
, Qrun
)
3787 && ! EQ (wait_proc
->status
, Qconnect
))
3789 int nread
, total_nread
= 0;
3791 clear_waiting_for_input ();
3792 XSETPROCESS (proc
, wait_proc
);
3794 /* Read data from the process, until we exhaust it. */
3795 while (XINT (wait_proc
->infd
) >= 0)
3797 nread
= read_process_output (proc
, XINT (wait_proc
->infd
));
3803 total_nread
+= nread
;
3805 else if (nread
== -1 && EIO
== errno
)
3809 else if (nread
== -1 && EAGAIN
== errno
)
3813 else if (nread
== -1 && EWOULDBLOCK
== errno
)
3817 if (total_nread
> 0 && do_display
)
3818 redisplay_preserve_echo_area (10);
3823 /* Wait till there is something to do */
3825 if (!NILP (wait_for_cell
))
3827 Available
= non_process_wait_mask
;
3832 if (! XINT (read_kbd
))
3833 Available
= non_keyboard_wait_mask
;
3835 Available
= input_wait_mask
;
3836 check_connect
= (num_pending_connects
> 0);
3839 /* If frame size has changed or the window is newly mapped,
3840 redisplay now, before we start to wait. There is a race
3841 condition here; if a SIGIO arrives between now and the select
3842 and indicates that a frame is trashed, the select may block
3843 displaying a trashed screen. */
3844 if (frame_garbaged
&& do_display
)
3846 clear_waiting_for_input ();
3847 redisplay_preserve_echo_area (11);
3848 if (XINT (read_kbd
) < 0)
3849 set_waiting_for_input (&timeout
);
3853 if (XINT (read_kbd
) && detect_input_pending ())
3861 Connecting
= connect_wait_mask
;
3862 nfds
= select (max (max_process_desc
, max_keyboard_desc
) + 1,
3864 (check_connect
? &Connecting
: (SELECT_TYPE
*)0),
3865 (SELECT_TYPE
*)0, &timeout
);
3870 /* Make C-g and alarm signals set flags again */
3871 clear_waiting_for_input ();
3873 /* If we woke up due to SIGWINCH, actually change size now. */
3874 do_pending_window_change (0);
3876 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
3877 /* We wanted the full specified time, so return now. */
3881 if (xerrno
== EINTR
)
3884 /* Ultrix select seems to return ENOMEM when it is
3885 interrupted. Treat it just like EINTR. Bleah. Note
3886 that we want to test for the "ultrix" CPP symbol, not
3887 "__ultrix__"; the latter is only defined under GCC, but
3888 not by DEC's bundled CC. -JimB */
3889 else if (xerrno
== ENOMEM
)
3893 /* This happens for no known reason on ALLIANT.
3894 I am guessing that this is the right response. -- RMS. */
3895 else if (xerrno
== EFAULT
)
3898 else if (xerrno
== EBADF
)
3901 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
3902 the child's closure of the pts gives the parent a SIGHUP, and
3903 the ptc file descriptor is automatically closed,
3904 yielding EBADF here or at select() call above.
3905 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
3906 in m/ibmrt-aix.h), and here we just ignore the select error.
3907 Cleanup occurs c/o status_notify after SIGCLD. */
3908 no_avail
= 1; /* Cannot depend on values returned */
3914 error ("select error: %s", emacs_strerror (xerrno
));
3919 FD_ZERO (&Available
);
3923 #if defined(sun) && !defined(USG5_4)
3924 if (nfds
> 0 && keyboard_bit_set (&Available
)
3926 /* System sometimes fails to deliver SIGIO.
3928 David J. Mackenzie says that Emacs doesn't compile under
3929 Solaris if this code is enabled, thus the USG5_4 in the CPP
3930 conditional. "I haven't noticed any ill effects so far.
3931 If you find a Solaris expert somewhere, they might know
3933 kill (getpid (), SIGIO
);
3936 #if 0 /* When polling is used, interrupt_input is 0,
3937 so get_input_pending should read the input.
3938 So this should not be needed. */
3939 /* If we are using polling for input,
3940 and we see input available, make it get read now.
3941 Otherwise it might not actually get read for a second.
3942 And on hpux, since we turn off polling in wait_reading_process_input,
3943 it might never get read at all if we don't spend much time
3944 outside of wait_reading_process_input. */
3945 if (XINT (read_kbd
) && interrupt_input
3946 && keyboard_bit_set (&Available
)
3947 && input_polling_used ())
3948 kill (getpid (), SIGALRM
);
3951 /* Check for keyboard input */
3952 /* If there is any, return immediately
3953 to give it higher priority than subprocesses */
3955 if (XINT (read_kbd
) != 0)
3957 int old_timers_run
= timers_run
;
3958 struct buffer
*old_buffer
= current_buffer
;
3961 if (detect_input_pending_run_timers (do_display
))
3963 swallow_events (do_display
);
3964 if (detect_input_pending_run_timers (do_display
))
3968 /* If a timer has run, this might have changed buffers
3969 an alike. Make read_key_sequence aware of that. */
3970 if (timers_run
!= old_timers_run
3971 && waiting_for_user_input_p
== -1
3972 && old_buffer
!= current_buffer
)
3973 record_asynch_buffer_change ();
3979 /* If there is unread keyboard input, also return. */
3980 if (XINT (read_kbd
) != 0
3981 && requeued_events_pending_p ())
3984 /* If we are not checking for keyboard input now,
3985 do process events (but don't run any timers).
3986 This is so that X events will be processed.
3987 Otherwise they may have to wait until polling takes place.
3988 That would causes delays in pasting selections, for example.
3990 (We used to do this only if wait_for_cell.) */
3991 if (XINT (read_kbd
) == 0 && detect_input_pending ())
3993 swallow_events (do_display
);
3994 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
3995 if (detect_input_pending ())
4000 /* Exit now if the cell we're waiting for became non-nil. */
4001 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4005 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4006 go read it. This can happen with X on BSD after logging out.
4007 In that case, there really is no input and no SIGIO,
4008 but select says there is input. */
4010 if (XINT (read_kbd
) && interrupt_input
4011 && keyboard_bit_set (&Available
))
4012 kill (getpid (), SIGIO
);
4016 got_some_input
|= nfds
> 0;
4018 /* If checking input just got us a size-change event from X,
4019 obey it now if we should. */
4020 if (XINT (read_kbd
) || ! NILP (wait_for_cell
))
4021 do_pending_window_change (0);
4023 /* Check for data from a process. */
4024 if (no_avail
|| nfds
== 0)
4027 /* Really FIRST_PROC_DESC should be 0 on Unix,
4028 but this is safer in the short run. */
4029 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4031 if (FD_ISSET (channel
, &Available
)
4032 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
4036 /* If waiting for this channel, arrange to return as
4037 soon as no more input to be processed. No more
4039 if (wait_channel
== channel
)
4045 proc
= chan_process
[channel
];
4049 /* If this is a server stream socket, accept connection. */
4050 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4052 server_accept_connection (proc
, channel
);
4056 /* Read data from the process, starting with our
4057 buffered-ahead character if we have one. */
4059 nread
= read_process_output (proc
, channel
);
4062 /* Since read_process_output can run a filter,
4063 which can call accept-process-output,
4064 don't try to read from any other processes
4065 before doing the select again. */
4066 FD_ZERO (&Available
);
4069 redisplay_preserve_echo_area (12);
4072 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4075 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4076 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4078 else if (nread
== -1 && errno
== EAGAIN
)
4082 else if (nread
== -1 && errno
== EAGAIN
)
4084 /* Note that we cannot distinguish between no input
4085 available now and a closed pipe.
4086 With luck, a closed pipe will be accompanied by
4087 subprocess termination and SIGCHLD. */
4088 else if (nread
== 0 && !NETCONN_P (proc
))
4090 #endif /* O_NDELAY */
4091 #endif /* O_NONBLOCK */
4093 /* On some OSs with ptys, when the process on one end of
4094 a pty exits, the other end gets an error reading with
4095 errno = EIO instead of getting an EOF (0 bytes read).
4096 Therefore, if we get an error reading and errno =
4097 EIO, just continue, because the child process has
4098 exited and should clean itself up soon (e.g. when we
4101 However, it has been known to happen that the SIGCHLD
4102 got lost. So raise the signl again just in case.
4104 else if (nread
== -1 && errno
== EIO
)
4105 kill (getpid (), SIGCHLD
);
4106 #endif /* HAVE_PTYS */
4107 /* If we can detect process termination, don't consider the process
4108 gone just because its pipe is closed. */
4110 else if (nread
== 0 && !NETCONN_P (proc
))
4115 /* Preserve status of processes already terminated. */
4116 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
4117 deactivate_process (proc
);
4118 if (!NILP (XPROCESS (proc
)->raw_status_low
))
4119 update_status (XPROCESS (proc
));
4120 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4121 XPROCESS (proc
)->status
4122 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
4125 #ifdef NON_BLOCKING_CONNECT
4126 if (check_connect
&& FD_ISSET (channel
, &Connecting
))
4128 struct Lisp_Process
*p
;
4130 FD_CLR (channel
, &connect_wait_mask
);
4131 if (--num_pending_connects
< 0)
4134 proc
= chan_process
[channel
];
4138 p
= XPROCESS (proc
);
4141 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4142 So only use it on systems where it is known to work. */
4144 int xlen
= sizeof(xerrno
);
4145 if (getsockopt(channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4150 struct sockaddr pname
;
4151 int pnamelen
= sizeof(pname
);
4153 /* If connection failed, getpeername will fail. */
4155 if (getpeername(channel
, &pname
, &pnamelen
) < 0)
4157 /* Obtain connect failure code through error slippage. */
4160 if (errno
== ENOTCONN
&& read(channel
, &dummy
, 1) < 0)
4167 XSETINT (p
->tick
, ++process_tick
);
4168 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
4169 deactivate_process (proc
);
4174 /* Execute the sentinel here. If we had relied on
4175 status_notify to do it later, it will read input
4176 from the process before calling the sentinel. */
4177 exec_sentinel (proc
, build_string ("open\n"));
4178 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4180 FD_SET (XINT (p
->infd
), &input_wait_mask
);
4181 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
4185 #endif /* NON_BLOCKING_CONNECT */
4186 } /* end for each file descriptor */
4187 } /* end while exit conditions not met */
4189 waiting_for_user_input_p
= 0;
4191 /* If calling from keyboard input, do not quit
4192 since we want to return C-g as an input character.
4193 Otherwise, do pending quit if requested. */
4194 if (XINT (read_kbd
) >= 0)
4196 /* Prevent input_pending from remaining set if we quit. */
4197 clear_input_pending ();
4201 /* AlainF 5-Jul-1996
4202 HP-UX 10.10 seems to have problems with signals coming in
4203 Causes "poll: interrupted system call" messages when Emacs is run
4205 Turn periodic alarms back on */
4209 return got_some_input
;
4212 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
4215 read_process_output_call (fun_and_args
)
4216 Lisp_Object fun_and_args
;
4218 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
4222 read_process_output_error_handler (error
)
4225 cmd_error_internal (error
, "error in process filter: ");
4227 update_echo_area ();
4228 Fsleep_for (make_number (2), Qnil
);
4232 /* Read pending output from the process channel,
4233 starting with our buffered-ahead character if we have one.
4234 Yield number of decoded characters read.
4236 This function reads at most 1024 characters.
4237 If you want to read all available subprocess output,
4238 you must call it repeatedly until it returns zero.
4240 The characters read are decoded according to PROC's coding-system
4244 read_process_output (proc
, channel
)
4246 register int channel
;
4248 register int nchars
, nbytes
;
4250 register Lisp_Object outstream
;
4251 register struct buffer
*old
= current_buffer
;
4252 register struct Lisp_Process
*p
= XPROCESS (proc
);
4253 register int opoint
;
4254 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
4255 int carryover
= XINT (p
->decoding_carryover
);
4259 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
4261 vs
= get_vms_process_pointer (p
->pid
);
4265 return (0); /* Really weird if it does this */
4266 if (!(vs
->iosb
[0] & 1))
4267 return -1; /* I/O error */
4270 error ("Could not get VMS process pointer");
4271 chars
= vs
->inputBuffer
;
4272 nbytes
= clean_vms_buffer (chars
, vs
->iosb
[1]);
4275 start_vms_process_read (vs
); /* Crank up the next read on the process */
4276 return 1; /* Nothing worth printing, say we got 1 */
4280 /* The data carried over in the previous decoding (which are at
4281 the tail of decoding buffer) should be prepended to the new
4282 data read to decode all together. */
4283 chars
= (char *) alloca (nbytes
+ carryover
);
4284 bcopy (XSTRING (p
->decoding_buf
)->data
, buf
, carryover
);
4285 bcopy (vs
->inputBuffer
, chars
+ carryover
, nbytes
);
4289 #ifdef DATAGRAM_SOCKETS
4290 /* A datagram is one packet; allow at least 1500+ bytes of data
4291 corresponding to the typical Ethernet frame size. */
4292 if (DATAGRAM_CHAN_P (channel
))
4294 /* carryover = 0; */ /* Does carryover make sense for datagrams? */
4299 chars
= (char *) alloca (carryover
+ readmax
);
4301 /* See the comment above. */
4302 bcopy (XSTRING (p
->decoding_buf
)->data
, chars
, carryover
);
4304 #ifdef DATAGRAM_SOCKETS
4305 /* We have a working select, so proc_buffered_char is always -1. */
4306 if (DATAGRAM_CHAN_P (channel
))
4308 int len
= datagram_address
[channel
].len
;
4309 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
- carryover
,
4310 0, datagram_address
[channel
].sa
, &len
);
4314 if (proc_buffered_char
[channel
] < 0)
4315 nbytes
= emacs_read (channel
, chars
+ carryover
, readmax
- carryover
);
4318 chars
[carryover
] = proc_buffered_char
[channel
];
4319 proc_buffered_char
[channel
] = -1;
4320 nbytes
= emacs_read (channel
, chars
+ carryover
+ 1, readmax
- 1 - carryover
);
4324 nbytes
= nbytes
+ 1;
4326 #endif /* not VMS */
4328 XSETINT (p
->decoding_carryover
, 0);
4330 /* At this point, NBYTES holds number of bytes just received
4331 (including the one in proc_buffered_char[channel]). */
4334 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
4336 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
4339 /* Now set NBYTES how many bytes we must decode. */
4340 nbytes
+= carryover
;
4342 /* Read and dispose of the process output. */
4343 outstream
= p
->filter
;
4344 if (!NILP (outstream
))
4346 /* We inhibit quit here instead of just catching it so that
4347 hitting ^G when a filter happens to be running won't screw
4349 int count
= specpdl_ptr
- specpdl
;
4350 Lisp_Object odeactivate
;
4351 Lisp_Object obuffer
, okeymap
;
4353 int outer_running_asynch_code
= running_asynch_code
;
4354 int waiting
= waiting_for_user_input_p
;
4356 /* No need to gcpro these, because all we do with them later
4357 is test them for EQness, and none of them should be a string. */
4358 odeactivate
= Vdeactivate_mark
;
4359 XSETBUFFER (obuffer
, current_buffer
);
4360 okeymap
= current_buffer
->keymap
;
4362 specbind (Qinhibit_quit
, Qt
);
4363 specbind (Qlast_nonmenu_event
, Qt
);
4365 /* In case we get recursively called,
4366 and we already saved the match data nonrecursively,
4367 save the same match data in safely recursive fashion. */
4368 if (outer_running_asynch_code
)
4371 /* Don't clobber the CURRENT match data, either! */
4372 tem
= Fmatch_data (Qnil
, Qnil
);
4373 restore_match_data ();
4374 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
4375 Fset_match_data (tem
);
4378 /* For speed, if a search happens within this code,
4379 save the match data in a special nonrecursive fashion. */
4380 running_asynch_code
= 1;
4382 text
= decode_coding_string (make_unibyte_string (chars
, nbytes
),
4384 if (NILP (buffer_defaults
.enable_multibyte_characters
))
4385 /* We had better return unibyte string. */
4386 text
= string_make_unibyte (text
);
4388 Vlast_coding_system_used
= coding
->symbol
;
4389 /* A new coding system might be found. */
4390 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
4392 p
->decode_coding_system
= coding
->symbol
;
4394 /* Don't call setup_coding_system for
4395 proc_decode_coding_system[channel] here. It is done in
4396 detect_coding called via decode_coding above. */
4398 /* If a coding system for encoding is not yet decided, we set
4399 it as the same as coding-system for decoding.
4401 But, before doing that we must check if
4402 proc_encode_coding_system[p->outfd] surely points to a
4403 valid memory because p->outfd will be changed once EOF is
4404 sent to the process. */
4405 if (NILP (p
->encode_coding_system
)
4406 && proc_encode_coding_system
[XINT (p
->outfd
)])
4408 p
->encode_coding_system
= coding
->symbol
;
4409 setup_coding_system (coding
->symbol
,
4410 proc_encode_coding_system
[XINT (p
->outfd
)]);
4414 carryover
= nbytes
- coding
->consumed
;
4415 bcopy (chars
+ coding
->consumed
, XSTRING (p
->decoding_buf
)->data
,
4417 XSETINT (p
->decoding_carryover
, carryover
);
4418 nbytes
= STRING_BYTES (XSTRING (text
));
4419 nchars
= XSTRING (text
)->size
;
4421 internal_condition_case_1 (read_process_output_call
,
4423 Fcons (proc
, Fcons (text
, Qnil
))),
4424 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
4425 read_process_output_error_handler
);
4427 /* If we saved the match data nonrecursively, restore it now. */
4428 restore_match_data ();
4429 running_asynch_code
= outer_running_asynch_code
;
4431 /* Handling the process output should not deactivate the mark. */
4432 Vdeactivate_mark
= odeactivate
;
4434 /* Restore waiting_for_user_input_p as it was
4435 when we were called, in case the filter clobbered it. */
4436 waiting_for_user_input_p
= waiting
;
4438 #if 0 /* Call record_asynch_buffer_change unconditionally,
4439 because we might have changed minor modes or other things
4440 that affect key bindings. */
4441 if (! EQ (Fcurrent_buffer (), obuffer
)
4442 || ! EQ (current_buffer
->keymap
, okeymap
))
4444 /* But do it only if the caller is actually going to read events.
4445 Otherwise there's no need to make him wake up, and it could
4446 cause trouble (for example it would make Fsit_for return). */
4447 if (waiting_for_user_input_p
== -1)
4448 record_asynch_buffer_change ();
4451 start_vms_process_read (vs
);
4453 unbind_to (count
, Qnil
);
4457 /* If no filter, write into buffer if it isn't dead. */
4458 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
4460 Lisp_Object old_read_only
;
4461 int old_begv
, old_zv
;
4462 int old_begv_byte
, old_zv_byte
;
4463 Lisp_Object odeactivate
;
4464 int before
, before_byte
;
4469 odeactivate
= Vdeactivate_mark
;
4471 Fset_buffer (p
->buffer
);
4473 opoint_byte
= PT_BYTE
;
4474 old_read_only
= current_buffer
->read_only
;
4477 old_begv_byte
= BEGV_BYTE
;
4478 old_zv_byte
= ZV_BYTE
;
4480 current_buffer
->read_only
= Qnil
;
4482 /* Insert new output into buffer
4483 at the current end-of-output marker,
4484 thus preserving logical ordering of input and output. */
4485 if (XMARKER (p
->mark
)->buffer
)
4486 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
4487 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
4490 SET_PT_BOTH (ZV
, ZV_BYTE
);
4492 before_byte
= PT_BYTE
;
4494 /* If the output marker is outside of the visible region, save
4495 the restriction and widen. */
4496 if (! (BEGV
<= PT
&& PT
<= ZV
))
4499 text
= decode_coding_string (make_unibyte_string (chars
, nbytes
),
4501 Vlast_coding_system_used
= coding
->symbol
;
4502 /* A new coding system might be found. See the comment in the
4503 similar code in the previous `if' block. */
4504 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
4506 p
->decode_coding_system
= coding
->symbol
;
4507 if (NILP (p
->encode_coding_system
)
4508 && proc_encode_coding_system
[XINT (p
->outfd
)])
4510 p
->encode_coding_system
= coding
->symbol
;
4511 setup_coding_system (coding
->symbol
,
4512 proc_encode_coding_system
[XINT (p
->outfd
)]);
4515 carryover
= nbytes
- coding
->consumed
;
4516 bcopy (chars
+ coding
->consumed
, XSTRING (p
->decoding_buf
)->data
,
4518 XSETINT (p
->decoding_carryover
, carryover
);
4519 /* Adjust the multibyteness of TEXT to that of the buffer. */
4520 if (NILP (current_buffer
->enable_multibyte_characters
)
4521 != ! STRING_MULTIBYTE (text
))
4522 text
= (STRING_MULTIBYTE (text
)
4523 ? Fstring_as_unibyte (text
)
4524 : Fstring_as_multibyte (text
));
4525 nbytes
= STRING_BYTES (XSTRING (text
));
4526 nchars
= XSTRING (text
)->size
;
4527 /* Insert before markers in case we are inserting where
4528 the buffer's mark is, and the user's next command is Meta-y. */
4529 insert_from_string_before_markers (text
, 0, 0, nchars
, nbytes
, 0);
4531 /* Make sure the process marker's position is valid when the
4532 process buffer is changed in the signal_after_change above.
4533 W3 is known to do that. */
4534 if (BUFFERP (p
->buffer
)
4535 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
4536 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
4538 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
4540 update_mode_lines
++;
4542 /* Make sure opoint and the old restrictions
4543 float ahead of any new text just as point would. */
4544 if (opoint
>= before
)
4546 opoint
+= PT
- before
;
4547 opoint_byte
+= PT_BYTE
- before_byte
;
4549 if (old_begv
> before
)
4551 old_begv
+= PT
- before
;
4552 old_begv_byte
+= PT_BYTE
- before_byte
;
4554 if (old_zv
>= before
)
4556 old_zv
+= PT
- before
;
4557 old_zv_byte
+= PT_BYTE
- before_byte
;
4560 /* If the restriction isn't what it should be, set it. */
4561 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
4562 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
4564 /* Handling the process output should not deactivate the mark. */
4565 Vdeactivate_mark
= odeactivate
;
4567 current_buffer
->read_only
= old_read_only
;
4568 SET_PT_BOTH (opoint
, opoint_byte
);
4569 set_buffer_internal (old
);
4572 start_vms_process_read (vs
);
4577 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
4579 doc
: /* Returns non-nil if emacs is waiting for input from the user.
4580 This is intended for use by asynchronous process output filters and sentinels. */)
4583 return (waiting_for_user_input_p
? Qt
: Qnil
);
4586 /* Sending data to subprocess */
4588 jmp_buf send_process_frame
;
4589 Lisp_Object process_sent_to
;
4592 send_process_trap ()
4598 longjmp (send_process_frame
, 1);
4601 /* Send some data to process PROC.
4602 BUF is the beginning of the data; LEN is the number of characters.
4603 OBJECT is the Lisp object that the data comes from. If OBJECT is
4604 nil or t, it means that the data comes from C string.
4606 If OBJECT is not nil, the data is encoded by PROC's coding-system
4607 for encoding before it is sent.
4609 This function can evaluate Lisp code and can garbage collect. */
4612 send_process (proc
, buf
, len
, object
)
4613 volatile Lisp_Object proc
;
4614 unsigned char *volatile buf
;
4616 volatile Lisp_Object object
;
4618 /* Use volatile to protect variables from being clobbered by longjmp. */
4620 struct coding_system
*coding
;
4621 struct gcpro gcpro1
;
4626 struct Lisp_Process
*p
= XPROCESS (proc
);
4627 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
4630 if (! NILP (XPROCESS (proc
)->raw_status_low
))
4631 update_status (XPROCESS (proc
));
4632 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
4633 error ("Process %s not running",
4634 XSTRING (XPROCESS (proc
)->name
)->data
);
4635 if (XINT (XPROCESS (proc
)->outfd
) < 0)
4636 error ("Output file descriptor of %s is closed",
4637 XSTRING (XPROCESS (proc
)->name
)->data
);
4639 coding
= proc_encode_coding_system
[XINT (XPROCESS (proc
)->outfd
)];
4640 Vlast_coding_system_used
= coding
->symbol
;
4642 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
4643 || (BUFFERP (object
)
4644 && !NILP (XBUFFER (object
)->enable_multibyte_characters
))
4647 if (!EQ (coding
->symbol
, XPROCESS (proc
)->encode_coding_system
))
4648 /* The coding system for encoding was changed to raw-text
4649 because we sent a unibyte text previously. Now we are
4650 sending a multibyte text, thus we must encode it by the
4651 original coding system specified for the current
4653 setup_coding_system (XPROCESS (proc
)->encode_coding_system
, coding
);
4654 /* src_multibyte should be set to 1 _after_ a call to
4655 setup_coding_system, since it resets src_multibyte to
4657 coding
->src_multibyte
= 1;
4661 /* For sending a unibyte text, character code conversion should
4662 not take place but EOL conversion should. So, setup raw-text
4663 or one of the subsidiary if we have not yet done it. */
4664 if (coding
->type
!= coding_type_raw_text
)
4666 if (CODING_REQUIRE_FLUSHING (coding
))
4668 /* But, before changing the coding, we must flush out data. */
4669 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
4670 send_process (proc
, "", 0, Qt
);
4672 coding
->src_multibyte
= 0;
4673 setup_raw_text_coding_system (coding
);
4676 coding
->dst_multibyte
= 0;
4678 if (CODING_REQUIRE_ENCODING (coding
))
4680 int require
= encoding_buffer_size (coding
, len
);
4681 int from_byte
= -1, from
= -1, to
= -1;
4682 unsigned char *temp_buf
= NULL
;
4684 if (BUFFERP (object
))
4686 from_byte
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
4687 from
= buf_bytepos_to_charpos (XBUFFER (object
), from_byte
);
4688 to
= buf_bytepos_to_charpos (XBUFFER (object
), from_byte
+ len
);
4690 else if (STRINGP (object
))
4692 from_byte
= buf
- XSTRING (object
)->data
;
4693 from
= string_byte_to_char (object
, from_byte
);
4694 to
= string_byte_to_char (object
, from_byte
+ len
);
4697 if (coding
->composing
!= COMPOSITION_DISABLED
)
4700 coding_save_composition (coding
, from
, to
, object
);
4702 coding
->composing
= COMPOSITION_DISABLED
;
4705 if (STRING_BYTES (XSTRING (XPROCESS (proc
)->encoding_buf
)) < require
)
4706 XPROCESS (proc
)->encoding_buf
= make_uninit_string (require
);
4709 buf
= (BUFFERP (object
)
4710 ? BUF_BYTE_ADDRESS (XBUFFER (object
), from_byte
)
4711 : XSTRING (object
)->data
+ from_byte
);
4713 object
= XPROCESS (proc
)->encoding_buf
;
4714 encode_coding (coding
, (char *) buf
, XSTRING (object
)->data
,
4715 len
, STRING_BYTES (XSTRING (object
)));
4716 len
= coding
->produced
;
4717 buf
= XSTRING (object
)->data
;
4723 vs
= get_vms_process_pointer (p
->pid
);
4725 error ("Could not find this process: %x", p
->pid
);
4726 else if (write_to_vms_process (vs
, buf
, len
))
4730 if (pty_max_bytes
== 0)
4732 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
4733 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
4735 if (pty_max_bytes
< 0)
4736 pty_max_bytes
= 250;
4738 pty_max_bytes
= 250;
4740 /* Deduct one, to leave space for the eof. */
4744 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
4745 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
4746 when returning with longjmp despite being declared volatile. */
4747 if (!setjmp (send_process_frame
))
4749 process_sent_to
= proc
;
4753 SIGTYPE (*old_sigpipe
)();
4755 /* Decide how much data we can send in one batch.
4756 Long lines need to be split into multiple batches. */
4757 if (!NILP (XPROCESS (proc
)->pty_flag
))
4759 /* Starting this at zero is always correct when not the first
4760 iteration because the previous iteration ended by sending C-d.
4761 It may not be correct for the first iteration
4762 if a partial line was sent in a separate send_process call.
4763 If that proves worth handling, we need to save linepos
4764 in the process object. */
4766 unsigned char *ptr
= (unsigned char *) buf
;
4767 unsigned char *end
= (unsigned char *) buf
+ len
;
4769 /* Scan through this text for a line that is too long. */
4770 while (ptr
!= end
&& linepos
< pty_max_bytes
)
4778 /* If we found one, break the line there
4779 and put in a C-d to force the buffer through. */
4783 /* Send this batch, using one or more write calls. */
4786 int outfd
= XINT (XPROCESS (proc
)->outfd
);
4787 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
4788 #ifdef DATAGRAM_SOCKETS
4789 if (DATAGRAM_CHAN_P (outfd
))
4791 rv
= sendto (outfd
, (char *) buf
, this,
4792 0, datagram_address
[outfd
].sa
,
4793 datagram_address
[outfd
].len
);
4794 if (rv
< 0 && errno
== EMSGSIZE
)
4795 report_file_error ("sending datagram", Fcons (proc
, Qnil
));
4799 rv
= emacs_write (outfd
, (char *) buf
, this);
4800 signal (SIGPIPE
, old_sigpipe
);
4806 || errno
== EWOULDBLOCK
4812 /* Buffer is full. Wait, accepting input;
4813 that may allow the program
4814 to finish doing output and read more. */
4819 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
4820 /* A gross hack to work around a bug in FreeBSD.
4821 In the following sequence, read(2) returns
4825 write(2) 954 bytes, get EAGAIN
4826 read(2) 1024 bytes in process_read_output
4827 read(2) 11 bytes in process_read_output
4829 That is, read(2) returns more bytes than have
4830 ever been written successfully. The 1033 bytes
4831 read are the 1022 bytes written successfully
4832 after processing (for example with CRs added if
4833 the terminal is set up that way which it is
4834 here). The same bytes will be seen again in a
4835 later read(2), without the CRs. */
4837 if (errno
== EAGAIN
)
4840 ioctl (XINT (XPROCESS (proc
)->outfd
), TIOCFLUSH
,
4843 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
4845 /* Running filters might relocate buffers or strings.
4846 Arrange to relocate BUF. */
4847 if (BUFFERP (object
))
4848 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
4849 else if (STRINGP (object
))
4850 offset
= buf
- XSTRING (object
)->data
;
4852 XSETFASTINT (zero
, 0);
4853 #ifdef EMACS_HAS_USECS
4854 wait_reading_process_input (0, 20000, zero
, 0);
4856 wait_reading_process_input (1, 0, zero
, 0);
4859 if (BUFFERP (object
))
4860 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
4861 else if (STRINGP (object
))
4862 buf
= offset
+ XSTRING (object
)->data
;
4867 /* This is a real error. */
4868 report_file_error ("writing to process", Fcons (proc
, Qnil
));
4875 /* If we sent just part of the string, put in an EOF
4876 to force it through, before we send the rest. */
4878 Fprocess_send_eof (proc
);
4881 #endif /* not VMS */
4885 proc
= process_sent_to
;
4887 XPROCESS (proc
)->raw_status_low
= Qnil
;
4888 XPROCESS (proc
)->raw_status_high
= Qnil
;
4889 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
4890 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
4891 deactivate_process (proc
);
4893 error ("Error writing to process %s; closed it",
4894 XSTRING (XPROCESS (proc
)->name
)->data
);
4896 error ("SIGPIPE raised on process %s; closed it",
4897 XSTRING (XPROCESS (proc
)->name
)->data
);
4904 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
4906 doc
: /* Send current contents of region as input to PROCESS.
4907 PROCESS may be a process, a buffer, the name of a process or buffer, or
4908 nil, indicating the current buffer's process.
4909 Called from program, takes three arguments, PROCESS, START and END.
4910 If the region is more than 500 characters long,
4911 it is sent in several bunches. This may happen even for shorter regions.
4912 Output from processes can arrive in between bunches. */)
4913 (process
, start
, end
)
4914 Lisp_Object process
, start
, end
;
4919 proc
= get_process (process
);
4920 validate_region (&start
, &end
);
4922 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
4923 move_gap (XINT (start
));
4925 start1
= CHAR_TO_BYTE (XINT (start
));
4926 end1
= CHAR_TO_BYTE (XINT (end
));
4927 send_process (proc
, BYTE_POS_ADDR (start1
), end1
- start1
,
4928 Fcurrent_buffer ());
4933 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
4935 doc
: /* Send PROCESS the contents of STRING as input.
4936 PROCESS may be a process, a buffer, the name of a process or buffer, or
4937 nil, indicating the current buffer's process.
4938 If STRING is more than 500 characters long,
4939 it is sent in several bunches. This may happen even for shorter strings.
4940 Output from processes can arrive in between bunches. */)
4942 Lisp_Object process
, string
;
4945 CHECK_STRING (string
);
4946 proc
= get_process (process
);
4947 send_process (proc
, XSTRING (string
)->data
,
4948 STRING_BYTES (XSTRING (string
)), string
);
4952 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
4953 Sprocess_running_child_p
, 0, 1, 0,
4954 doc
: /* Return t if PROCESS has given the terminal to a child.
4955 If the operating system does not make it possible to find out,
4956 return t unconditionally. */)
4958 Lisp_Object process
;
4960 /* Initialize in case ioctl doesn't exist or gives an error,
4961 in a way that will cause returning t. */
4964 struct Lisp_Process
*p
;
4966 proc
= get_process (process
);
4967 p
= XPROCESS (proc
);
4969 if (!EQ (p
->childp
, Qt
))
4970 error ("Process %s is not a subprocess",
4971 XSTRING (p
->name
)->data
);
4972 if (XINT (p
->infd
) < 0)
4973 error ("Process %s is not active",
4974 XSTRING (p
->name
)->data
);
4977 if (!NILP (p
->subtty
))
4978 ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
4980 ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
4981 #endif /* defined (TIOCGPGRP ) */
4983 if (gid
== XFASTINT (p
->pid
))
4988 /* send a signal number SIGNO to PROCESS.
4989 If CURRENT_GROUP is t, that means send to the process group
4990 that currently owns the terminal being used to communicate with PROCESS.
4991 This is used for various commands in shell mode.
4992 If CURRENT_GROUP is lambda, that means send to the process group
4993 that currently owns the terminal, but only if it is NOT the shell itself.
4995 If NOMSG is zero, insert signal-announcements into process's buffers
4998 If we can, we try to signal PROCESS by sending control characters
4999 down the pty. This allows us to signal inferiors who have changed
5000 their uid, for which killpg would return an EPERM error. */
5003 process_send_signal (process
, signo
, current_group
, nomsg
)
5004 Lisp_Object process
;
5006 Lisp_Object current_group
;
5010 register struct Lisp_Process
*p
;
5014 proc
= get_process (process
);
5015 p
= XPROCESS (proc
);
5017 if (!EQ (p
->childp
, Qt
))
5018 error ("Process %s is not a subprocess",
5019 XSTRING (p
->name
)->data
);
5020 if (XINT (p
->infd
) < 0)
5021 error ("Process %s is not active",
5022 XSTRING (p
->name
)->data
);
5024 if (NILP (p
->pty_flag
))
5025 current_group
= Qnil
;
5027 /* If we are using pgrps, get a pgrp number and make it negative. */
5028 if (!NILP (current_group
))
5030 #ifdef SIGNALS_VIA_CHARACTERS
5031 /* If possible, send signals to the entire pgrp
5032 by sending an input character to it. */
5034 /* TERMIOS is the latest and bestest, and seems most likely to
5035 work. If the system has it, use it. */
5042 tcgetattr (XINT (p
->infd
), &t
);
5043 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
5047 tcgetattr (XINT (p
->infd
), &t
);
5048 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
5052 tcgetattr (XINT (p
->infd
), &t
);
5053 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5054 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
5056 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
5061 #else /* ! HAVE_TERMIOS */
5063 /* On Berkeley descendants, the following IOCTL's retrieve the
5064 current control characters. */
5065 #if defined (TIOCGLTC) && defined (TIOCGETC)
5073 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
5074 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
5077 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
5078 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
5082 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
5083 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
5085 #endif /* ! defined (SIGTSTP) */
5088 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
5090 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
5097 ioctl (XINT (p
->infd
), TCGETA
, &t
);
5098 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
5101 ioctl (XINT (p
->infd
), TCGETA
, &t
);
5102 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
5106 ioctl (XINT (p
->infd
), TCGETA
, &t
);
5107 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
5109 #endif /* ! defined (SIGTSTP) */
5111 #else /* ! defined (TCGETA) */
5112 Your configuration files are messed up
.
5113 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
5114 you'd better be using one of the alternatives above! */
5115 #endif /* ! defined (TCGETA) */
5116 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
5117 #endif /* ! defined HAVE_TERMIOS */
5118 #endif /* ! defined (SIGNALS_VIA_CHARACTERS) */
5121 /* Get the pgrp using the tty itself, if we have that.
5122 Otherwise, use the pty to get the pgrp.
5123 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5124 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5125 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5126 His patch indicates that if TIOCGPGRP returns an error, then
5127 we should just assume that p->pid is also the process group id. */
5131 if (!NILP (p
->subtty
))
5132 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
5134 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
5138 gid
= - XFASTINT (p
->pid
);
5139 #endif /* ! defined (pfa) */
5145 #else /* ! defined (TIOCGPGRP ) */
5146 /* Can't select pgrps on this system, so we know that
5147 the child itself heads the pgrp. */
5148 gid
= - XFASTINT (p
->pid
);
5149 #endif /* ! defined (TIOCGPGRP ) */
5151 /* If current_group is lambda, and the shell owns the terminal,
5152 don't send any signal. */
5153 if (EQ (current_group
, Qlambda
) && gid
== - XFASTINT (p
->pid
))
5157 gid
= - XFASTINT (p
->pid
);
5163 p
->raw_status_low
= Qnil
;
5164 p
->raw_status_high
= Qnil
;
5166 XSETINT (p
->tick
, ++process_tick
);
5170 #endif /* ! defined (SIGCONT) */
5173 send_process (proc
, "\003", 1, Qnil
); /* ^C */
5178 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
5183 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
5186 flush_pending_output (XINT (p
->infd
));
5190 /* If we don't have process groups, send the signal to the immediate
5191 subprocess. That isn't really right, but it's better than any
5192 obvious alternative. */
5195 kill (XFASTINT (p
->pid
), signo
);
5199 /* gid may be a pid, or minus a pgrp's number */
5201 if (!NILP (current_group
))
5202 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
5205 gid
= - XFASTINT (p
->pid
);
5208 #else /* ! defined (TIOCSIGSEND) */
5209 EMACS_KILLPG (-gid
, signo
);
5210 #endif /* ! defined (TIOCSIGSEND) */
5213 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
5214 doc
: /* Interrupt process PROCESS.
5215 PROCESS may be a process, a buffer, or the name of a process or buffer.
5216 nil or no arg means current buffer's process.
5217 Second arg CURRENT-GROUP non-nil means send signal to
5218 the current process-group of the process's controlling terminal
5219 rather than to the process's own process group.
5220 If the process is a shell, this means interrupt current subjob
5221 rather than the shell.
5223 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
5224 don't send the signal. */)
5225 (process
, current_group
)
5226 Lisp_Object process
, current_group
;
5228 process_send_signal (process
, SIGINT
, current_group
, 0);
5232 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
5233 doc
: /* Kill process PROCESS. May be process or name of one.
5234 See function `interrupt-process' for more details on usage. */)
5235 (process
, current_group
)
5236 Lisp_Object process
, current_group
;
5238 process_send_signal (process
, SIGKILL
, current_group
, 0);
5242 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
5243 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
5244 See function `interrupt-process' for more details on usage. */)
5245 (process
, current_group
)
5246 Lisp_Object process
, current_group
;
5248 process_send_signal (process
, SIGQUIT
, current_group
, 0);
5252 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
5253 doc
: /* Stop process PROCESS. May be process or name of one.
5254 See function `interrupt-process' for more details on usage.
5255 If PROCESS is a network process, inhibit handling of incoming traffic. */)
5256 (process
, current_group
)
5257 Lisp_Object process
, current_group
;
5260 if (PROCESSP (process
) && NETCONN_P (process
))
5262 struct Lisp_Process
*p
;
5264 p
= XPROCESS (process
);
5265 if (NILP (p
->command
)
5266 && XINT (p
->infd
) >= 0)
5268 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
5269 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
5276 error ("no SIGTSTP support");
5278 process_send_signal (process
, SIGTSTP
, current_group
, 0);
5283 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
5284 doc
: /* Continue process PROCESS. May be process or name of one.
5285 See function `interrupt-process' for more details on usage.
5286 If PROCESS is a network process, resume handling of incoming traffic. */)
5287 (process
, current_group
)
5288 Lisp_Object process
, current_group
;
5291 if (PROCESSP (process
) && NETCONN_P (process
))
5293 struct Lisp_Process
*p
;
5295 p
= XPROCESS (process
);
5296 if (EQ (p
->command
, Qt
)
5297 && XINT (p
->infd
) >= 0
5298 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
5300 FD_SET (XINT (p
->infd
), &input_wait_mask
);
5301 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
5308 process_send_signal (process
, SIGCONT
, current_group
, 0);
5310 error ("no SIGCONT support");
5315 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
5316 2, 2, "nProcess number: \nnSignal code: ",
5317 doc
: /* Send the process with process id PID the signal with code SIGCODE.
5318 PID must be an integer. The process need not be a child of this Emacs.
5319 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
5321 Lisp_Object pid
, sigcode
;
5325 #define handle_signal(NAME, VALUE) \
5326 else if (!strcmp (name, NAME)) \
5327 XSETINT (sigcode, VALUE)
5329 if (INTEGERP (sigcode
))
5333 unsigned char *name
;
5335 CHECK_SYMBOL (sigcode
);
5336 name
= XSYMBOL (sigcode
)->name
->data
;
5341 handle_signal ("SIGHUP", SIGHUP
);
5344 handle_signal ("SIGINT", SIGINT
);
5347 handle_signal ("SIGQUIT", SIGQUIT
);
5350 handle_signal ("SIGILL", SIGILL
);
5353 handle_signal ("SIGABRT", SIGABRT
);
5356 handle_signal ("SIGEMT", SIGEMT
);
5359 handle_signal ("SIGKILL", SIGKILL
);
5362 handle_signal ("SIGFPE", SIGFPE
);
5365 handle_signal ("SIGBUS", SIGBUS
);
5368 handle_signal ("SIGSEGV", SIGSEGV
);
5371 handle_signal ("SIGSYS", SIGSYS
);
5374 handle_signal ("SIGPIPE", SIGPIPE
);
5377 handle_signal ("SIGALRM", SIGALRM
);
5380 handle_signal ("SIGTERM", SIGTERM
);
5383 handle_signal ("SIGURG", SIGURG
);
5386 handle_signal ("SIGSTOP", SIGSTOP
);
5389 handle_signal ("SIGTSTP", SIGTSTP
);
5392 handle_signal ("SIGCONT", SIGCONT
);
5395 handle_signal ("SIGCHLD", SIGCHLD
);
5398 handle_signal ("SIGTTIN", SIGTTIN
);
5401 handle_signal ("SIGTTOU", SIGTTOU
);
5404 handle_signal ("SIGIO", SIGIO
);
5407 handle_signal ("SIGXCPU", SIGXCPU
);
5410 handle_signal ("SIGXFSZ", SIGXFSZ
);
5413 handle_signal ("SIGVTALRM", SIGVTALRM
);
5416 handle_signal ("SIGPROF", SIGPROF
);
5419 handle_signal ("SIGWINCH", SIGWINCH
);
5422 handle_signal ("SIGINFO", SIGINFO
);
5425 handle_signal ("SIGUSR1", SIGUSR1
);
5428 handle_signal ("SIGUSR2", SIGUSR2
);
5431 error ("Undefined signal name %s", name
);
5434 #undef handle_signal
5436 return make_number (kill (XINT (pid
), XINT (sigcode
)));
5439 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
5440 doc
: /* Make PROCESS see end-of-file in its input.
5441 EOF comes after any text already sent to it.
5442 PROCESS may be a process, a buffer, the name of a process or buffer, or
5443 nil, indicating the current buffer's process.
5444 If PROCESS is a network connection, or is a process communicating
5445 through a pipe (as opposed to a pty), then you cannot send any more
5446 text to PROCESS after you call this function. */)
5448 Lisp_Object process
;
5451 struct coding_system
*coding
;
5453 if (DATAGRAM_CONN_P (process
))
5456 proc
= get_process (process
);
5457 coding
= proc_encode_coding_system
[XINT (XPROCESS (proc
)->outfd
)];
5459 /* Make sure the process is really alive. */
5460 if (! NILP (XPROCESS (proc
)->raw_status_low
))
5461 update_status (XPROCESS (proc
));
5462 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
5463 error ("Process %s not running", XSTRING (XPROCESS (proc
)->name
)->data
);
5465 if (CODING_REQUIRE_FLUSHING (coding
))
5467 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5468 send_process (proc
, "", 0, Qnil
);
5472 send_process (proc
, "\032", 1, Qnil
); /* ^z */
5474 if (!NILP (XPROCESS (proc
)->pty_flag
))
5475 send_process (proc
, "\004", 1, Qnil
);
5478 int old_outfd
, new_outfd
;
5480 #ifdef HAVE_SHUTDOWN
5481 /* If this is a network connection, or socketpair is used
5482 for communication with the subprocess, call shutdown to cause EOF.
5483 (In some old system, shutdown to socketpair doesn't work.
5484 Then we just can't win.) */
5485 if (NILP (XPROCESS (proc
)->pid
)
5486 || XINT (XPROCESS (proc
)->outfd
) == XINT (XPROCESS (proc
)->infd
))
5487 shutdown (XINT (XPROCESS (proc
)->outfd
), 1);
5488 /* In case of socketpair, outfd == infd, so don't close it. */
5489 if (XINT (XPROCESS (proc
)->outfd
) != XINT (XPROCESS (proc
)->infd
))
5490 emacs_close (XINT (XPROCESS (proc
)->outfd
));
5491 #else /* not HAVE_SHUTDOWN */
5492 emacs_close (XINT (XPROCESS (proc
)->outfd
));
5493 #endif /* not HAVE_SHUTDOWN */
5494 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
5495 old_outfd
= XINT (XPROCESS (proc
)->outfd
);
5497 if (!proc_encode_coding_system
[new_outfd
])
5498 proc_encode_coding_system
[new_outfd
]
5499 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
5500 bcopy (proc_encode_coding_system
[old_outfd
],
5501 proc_encode_coding_system
[new_outfd
],
5502 sizeof (struct coding_system
));
5503 bzero (proc_encode_coding_system
[old_outfd
],
5504 sizeof (struct coding_system
));
5506 XSETINT (XPROCESS (proc
)->outfd
, new_outfd
);
5512 /* Kill all processes associated with `buffer'.
5513 If `buffer' is nil, kill all processes */
5516 kill_buffer_processes (buffer
)
5519 Lisp_Object tail
, proc
;
5521 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
5523 proc
= XCDR (XCAR (tail
));
5524 if (GC_PROCESSP (proc
)
5525 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
5527 if (NETCONN_P (proc
))
5528 Fdelete_process (proc
);
5529 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
5530 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
5535 /* On receipt of a signal that a child status has changed, loop asking
5536 about children with changed statuses until the system says there
5539 All we do is change the status; we do not run sentinels or print
5540 notifications. That is saved for the next time keyboard input is
5541 done, in order to avoid timing errors.
5543 ** WARNING: this can be called during garbage collection.
5544 Therefore, it must not be fooled by the presence of mark bits in
5547 ** USG WARNING: Although it is not obvious from the documentation
5548 in signal(2), on a USG system the SIGCLD handler MUST NOT call
5549 signal() before executing at least one wait(), otherwise the
5550 handler will be called again, resulting in an infinite loop. The
5551 relevant portion of the documentation reads "SIGCLD signals will be
5552 queued and the signal-catching function will be continually
5553 reentered until the queue is empty". Invoking signal() causes the
5554 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
5558 sigchld_handler (signo
)
5561 int old_errno
= errno
;
5563 register struct Lisp_Process
*p
;
5564 extern EMACS_TIME
*input_available_clear_time
;
5568 sigheld
|= sigbit (SIGCHLD
);
5580 #endif /* no WUNTRACED */
5581 /* Keep trying to get a status until we get a definitive result. */
5585 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
5587 while (pid
< 0 && errno
== EINTR
);
5591 /* PID == 0 means no processes found, PID == -1 means a real
5592 failure. We have done all our job, so return. */
5594 /* USG systems forget handlers when they are used;
5595 must reestablish each time */
5596 #if defined (USG) && !defined (POSIX_SIGNALS)
5597 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
5600 sigheld
&= ~sigbit (SIGCHLD
);
5608 #endif /* no WNOHANG */
5610 /* Find the process that signaled us, and record its status. */
5613 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
5615 proc
= XCDR (XCAR (tail
));
5616 p
= XPROCESS (proc
);
5617 if (GC_EQ (p
->childp
, Qt
) && XINT (p
->pid
) == pid
)
5622 /* Look for an asynchronous process whose pid hasn't been filled
5625 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
5627 proc
= XCDR (XCAR (tail
));
5628 p
= XPROCESS (proc
);
5629 if (GC_INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
5634 /* Change the status of the process that was found. */
5637 union { int i
; WAITTYPE wt
; } u
;
5638 int clear_desc_flag
= 0;
5640 XSETINT (p
->tick
, ++process_tick
);
5642 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
5643 XSETINT (p
->raw_status_high
, u
.i
>> 16);
5645 /* If process has terminated, stop waiting for its output. */
5646 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
5647 && XINT (p
->infd
) >= 0)
5648 clear_desc_flag
= 1;
5650 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
5651 if (clear_desc_flag
)
5653 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
5654 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
5657 /* Tell wait_reading_process_input that it needs to wake up and
5659 if (input_available_clear_time
)
5660 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
5663 /* There was no asynchronous process found for that id. Check
5664 if we have a synchronous process. */
5667 synch_process_alive
= 0;
5669 /* Report the status of the synchronous process. */
5671 synch_process_retcode
= WRETCODE (w
);
5672 else if (WIFSIGNALED (w
))
5674 int code
= WTERMSIG (w
);
5677 synchronize_system_messages_locale ();
5678 signame
= strsignal (code
);
5681 signame
= "unknown";
5683 synch_process_death
= signame
;
5686 /* Tell wait_reading_process_input that it needs to wake up and
5688 if (input_available_clear_time
)
5689 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
5692 /* On some systems, we must return right away.
5693 If any more processes want to signal us, we will
5695 Otherwise (on systems that have WNOHANG), loop around
5696 to use up all the processes that have something to tell us. */
5697 #if (defined WINDOWSNT \
5698 || (defined USG && !defined GNU_LINUX \
5699 && !(defined HPUX && defined WNOHANG)))
5700 #if defined (USG) && ! defined (POSIX_SIGNALS)
5701 signal (signo
, sigchld_handler
);
5705 #endif /* USG, but not HPUX with WNOHANG */
5711 exec_sentinel_unwind (data
)
5714 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
5719 exec_sentinel_error_handler (error
)
5722 cmd_error_internal (error
, "error in process sentinel: ");
5724 update_echo_area ();
5725 Fsleep_for (make_number (2), Qnil
);
5730 exec_sentinel (proc
, reason
)
5731 Lisp_Object proc
, reason
;
5733 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
5734 register struct Lisp_Process
*p
= XPROCESS (proc
);
5735 int count
= specpdl_ptr
- specpdl
;
5736 int outer_running_asynch_code
= running_asynch_code
;
5737 int waiting
= waiting_for_user_input_p
;
5739 /* No need to gcpro these, because all we do with them later
5740 is test them for EQness, and none of them should be a string. */
5741 odeactivate
= Vdeactivate_mark
;
5742 XSETBUFFER (obuffer
, current_buffer
);
5743 okeymap
= current_buffer
->keymap
;
5745 sentinel
= p
->sentinel
;
5746 if (NILP (sentinel
))
5749 /* Zilch the sentinel while it's running, to avoid recursive invocations;
5750 assure that it gets restored no matter how the sentinel exits. */
5752 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
5753 /* Inhibit quit so that random quits don't screw up a running filter. */
5754 specbind (Qinhibit_quit
, Qt
);
5755 specbind (Qlast_nonmenu_event
, Qt
);
5757 /* In case we get recursively called,
5758 and we already saved the match data nonrecursively,
5759 save the same match data in safely recursive fashion. */
5760 if (outer_running_asynch_code
)
5763 tem
= Fmatch_data (Qnil
, Qnil
);
5764 restore_match_data ();
5765 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
5766 Fset_match_data (tem
);
5769 /* For speed, if a search happens within this code,
5770 save the match data in a special nonrecursive fashion. */
5771 running_asynch_code
= 1;
5773 internal_condition_case_1 (read_process_output_call
,
5775 Fcons (proc
, Fcons (reason
, Qnil
))),
5776 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5777 exec_sentinel_error_handler
);
5779 /* If we saved the match data nonrecursively, restore it now. */
5780 restore_match_data ();
5781 running_asynch_code
= outer_running_asynch_code
;
5783 Vdeactivate_mark
= odeactivate
;
5785 /* Restore waiting_for_user_input_p as it was
5786 when we were called, in case the filter clobbered it. */
5787 waiting_for_user_input_p
= waiting
;
5790 if (! EQ (Fcurrent_buffer (), obuffer
)
5791 || ! EQ (current_buffer
->keymap
, okeymap
))
5793 /* But do it only if the caller is actually going to read events.
5794 Otherwise there's no need to make him wake up, and it could
5795 cause trouble (for example it would make Fsit_for return). */
5796 if (waiting_for_user_input_p
== -1)
5797 record_asynch_buffer_change ();
5799 unbind_to (count
, Qnil
);
5802 /* Report all recent events of a change in process status
5803 (either run the sentinel or output a message).
5804 This is usually done while Emacs is waiting for keyboard input
5805 but can be done at other times. */
5810 register Lisp_Object proc
, buffer
;
5811 Lisp_Object tail
, msg
;
5812 struct gcpro gcpro1
, gcpro2
;
5816 /* We need to gcpro tail; if read_process_output calls a filter
5817 which deletes a process and removes the cons to which tail points
5818 from Vprocess_alist, and then causes a GC, tail is an unprotected
5822 /* Set this now, so that if new processes are created by sentinels
5823 that we run, we get called again to handle their status changes. */
5824 update_tick
= process_tick
;
5826 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
5829 register struct Lisp_Process
*p
;
5831 proc
= Fcdr (Fcar (tail
));
5832 p
= XPROCESS (proc
);
5834 if (XINT (p
->tick
) != XINT (p
->update_tick
))
5836 XSETINT (p
->update_tick
, XINT (p
->tick
));
5838 /* If process is still active, read any output that remains. */
5839 while (! EQ (p
->filter
, Qt
)
5840 && ! EQ (p
->status
, Qconnect
)
5841 && ! EQ (p
->status
, Qlisten
)
5842 && ! EQ (p
->command
, Qt
) /* Network process not stopped. */
5843 && XINT (p
->infd
) >= 0
5844 && read_process_output (proc
, XINT (p
->infd
)) > 0);
5848 /* Get the text to use for the message. */
5849 if (!NILP (p
->raw_status_low
))
5851 msg
= status_message (p
->status
);
5853 /* If process is terminated, deactivate it or delete it. */
5855 if (CONSP (p
->status
))
5856 symbol
= XCAR (p
->status
);
5858 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
5859 || EQ (symbol
, Qclosed
))
5861 if (delete_exited_processes
)
5862 remove_process (proc
);
5864 deactivate_process (proc
);
5867 /* The actions above may have further incremented p->tick.
5868 So set p->update_tick again
5869 so that an error in the sentinel will not cause
5870 this code to be run again. */
5871 XSETINT (p
->update_tick
, XINT (p
->tick
));
5872 /* Now output the message suitably. */
5873 if (!NILP (p
->sentinel
))
5874 exec_sentinel (proc
, msg
);
5875 /* Don't bother with a message in the buffer
5876 when a process becomes runnable. */
5877 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
5879 Lisp_Object ro
, tem
;
5880 struct buffer
*old
= current_buffer
;
5881 int opoint
, opoint_byte
;
5882 int before
, before_byte
;
5884 ro
= XBUFFER (buffer
)->read_only
;
5886 /* Avoid error if buffer is deleted
5887 (probably that's why the process is dead, too) */
5888 if (NILP (XBUFFER (buffer
)->name
))
5890 Fset_buffer (buffer
);
5893 opoint_byte
= PT_BYTE
;
5894 /* Insert new output into buffer
5895 at the current end-of-output marker,
5896 thus preserving logical ordering of input and output. */
5897 if (XMARKER (p
->mark
)->buffer
)
5898 Fgoto_char (p
->mark
);
5900 SET_PT_BOTH (ZV
, ZV_BYTE
);
5903 before_byte
= PT_BYTE
;
5905 tem
= current_buffer
->read_only
;
5906 current_buffer
->read_only
= Qnil
;
5907 insert_string ("\nProcess ");
5908 Finsert (1, &p
->name
);
5909 insert_string (" ");
5911 current_buffer
->read_only
= tem
;
5912 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5914 if (opoint
>= before
)
5915 SET_PT_BOTH (opoint
+ (PT
- before
),
5916 opoint_byte
+ (PT_BYTE
- before_byte
));
5918 SET_PT_BOTH (opoint
, opoint_byte
);
5920 set_buffer_internal (old
);
5925 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
5926 redisplay_preserve_echo_area (13);
5932 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
5933 Sset_process_coding_system
, 1, 3, 0,
5934 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
5935 DECODING will be used to decode subprocess output and ENCODING to
5936 encode subprocess input. */)
5937 (proc
, decoding
, encoding
)
5938 register Lisp_Object proc
, decoding
, encoding
;
5940 register struct Lisp_Process
*p
;
5942 CHECK_PROCESS (proc
);
5943 p
= XPROCESS (proc
);
5944 if (XINT (p
->infd
) < 0)
5945 error ("Input file descriptor of %s closed", XSTRING (p
->name
)->data
);
5946 if (XINT (p
->outfd
) < 0)
5947 error ("Output file descriptor of %s closed", XSTRING (p
->name
)->data
);
5949 p
->decode_coding_system
= Fcheck_coding_system (decoding
);
5950 p
->encode_coding_system
= Fcheck_coding_system (encoding
);
5951 setup_coding_system (decoding
,
5952 proc_decode_coding_system
[XINT (p
->infd
)]);
5953 setup_coding_system (encoding
,
5954 proc_encode_coding_system
[XINT (p
->outfd
)]);
5959 DEFUN ("process-coding-system",
5960 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
5961 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
5963 register Lisp_Object proc
;
5965 CHECK_PROCESS (proc
);
5966 return Fcons (XPROCESS (proc
)->decode_coding_system
,
5967 XPROCESS (proc
)->encode_coding_system
);
5970 /* The first time this is called, assume keyboard input comes from DESC
5971 instead of from where we used to expect it.
5972 Subsequent calls mean assume input keyboard can come from DESC
5973 in addition to other places. */
5975 static int add_keyboard_wait_descriptor_called_flag
;
5978 add_keyboard_wait_descriptor (desc
)
5981 if (! add_keyboard_wait_descriptor_called_flag
)
5982 FD_CLR (0, &input_wait_mask
);
5983 add_keyboard_wait_descriptor_called_flag
= 1;
5984 FD_SET (desc
, &input_wait_mask
);
5985 FD_SET (desc
, &non_process_wait_mask
);
5986 if (desc
> max_keyboard_desc
)
5987 max_keyboard_desc
= desc
;
5990 /* From now on, do not expect DESC to give keyboard input. */
5993 delete_keyboard_wait_descriptor (desc
)
5997 int lim
= max_keyboard_desc
;
5999 FD_CLR (desc
, &input_wait_mask
);
6000 FD_CLR (desc
, &non_process_wait_mask
);
6002 if (desc
== max_keyboard_desc
)
6003 for (fd
= 0; fd
< lim
; fd
++)
6004 if (FD_ISSET (fd
, &input_wait_mask
)
6005 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6006 max_keyboard_desc
= fd
;
6009 /* Return nonzero if *MASK has a bit set
6010 that corresponds to one of the keyboard input descriptors. */
6013 keyboard_bit_set (mask
)
6018 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
6019 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6020 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6033 if (! noninteractive
|| initialized
)
6035 signal (SIGCHLD
, sigchld_handler
);
6038 FD_ZERO (&input_wait_mask
);
6039 FD_ZERO (&non_keyboard_wait_mask
);
6040 FD_ZERO (&non_process_wait_mask
);
6041 max_process_desc
= 0;
6043 FD_SET (0, &input_wait_mask
);
6045 Vprocess_alist
= Qnil
;
6046 for (i
= 0; i
< MAXDESC
; i
++)
6048 chan_process
[i
] = Qnil
;
6049 proc_buffered_char
[i
] = -1;
6051 bzero (proc_decode_coding_system
, sizeof proc_decode_coding_system
);
6052 bzero (proc_encode_coding_system
, sizeof proc_encode_coding_system
);
6053 #ifdef DATAGRAM_SOCKETS
6054 bzero (datagram_address
, sizeof datagram_address
);
6059 Lisp_Object subfeatures
= Qnil
;
6060 #define ADD_SUBFEATURE(key, val) \
6061 subfeatures = Fcons (Fcons (key, Fcons (val, Qnil)), subfeatures)
6063 #ifdef NON_BLOCKING_CONNECT
6064 ADD_SUBFEATURE (QCnowait
, Qt
);
6066 #ifdef DATAGRAM_SOCKETS
6067 ADD_SUBFEATURE (QCtype
, Qdatagram
);
6069 #ifdef HAVE_LOCAL_SOCKETS
6070 ADD_SUBFEATURE (QCfamily
, Qlocal
);
6072 #ifdef HAVE_GETSOCKNAME
6073 ADD_SUBFEATURE (QCservice
, Qt
);
6076 ADD_SUBFEATURE (QCserver
, Qt
);
6078 #ifdef SO_BINDTODEVICE
6079 ADD_SUBFEATURE (QCoptions
, intern ("bindtodevice"));
6082 ADD_SUBFEATURE (QCoptions
, intern ("broadcast"));
6085 ADD_SUBFEATURE (QCoptions
, intern ("dontroute"));
6088 ADD_SUBFEATURE (QCoptions
, intern ("keepalive"));
6091 ADD_SUBFEATURE (QCoptions
, intern ("linger"));
6094 ADD_SUBFEATURE (QCoptions
, intern ("oobinline"));
6097 ADD_SUBFEATURE (QCoptions
, intern ("priority"));
6100 ADD_SUBFEATURE (QCoptions
, intern ("reuseaddr"));
6102 Fprovide (intern ("make-network-process"), subfeatures
);
6104 #endif /* HAVE_SOCKETS */
6110 Qprocessp
= intern ("processp");
6111 staticpro (&Qprocessp
);
6112 Qrun
= intern ("run");
6114 Qstop
= intern ("stop");
6116 Qsignal
= intern ("signal");
6117 staticpro (&Qsignal
);
6119 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
6122 Qexit = intern ("exit");
6123 staticpro (&Qexit); */
6125 Qopen
= intern ("open");
6127 Qclosed
= intern ("closed");
6128 staticpro (&Qclosed
);
6129 Qconnect
= intern ("connect");
6130 staticpro (&Qconnect
);
6131 Qfailed
= intern ("failed");
6132 staticpro (&Qfailed
);
6133 Qlisten
= intern ("listen");
6134 staticpro (&Qlisten
);
6135 Qlocal
= intern ("local");
6136 staticpro (&Qlocal
);
6137 Qdatagram
= intern ("datagram");
6138 staticpro (&Qdatagram
);
6140 QCname
= intern (":name");
6141 staticpro (&QCname
);
6142 QCbuffer
= intern (":buffer");
6143 staticpro (&QCbuffer
);
6144 QChost
= intern (":host");
6145 staticpro (&QChost
);
6146 QCservice
= intern (":service");
6147 staticpro (&QCservice
);
6148 QCtype
= intern (":type");
6149 staticpro (&QCtype
);
6150 QClocal
= intern (":local");
6151 staticpro (&QClocal
);
6152 QCremote
= intern (":remote");
6153 staticpro (&QCremote
);
6154 QCcoding
= intern (":coding");
6155 staticpro (&QCcoding
);
6156 QCserver
= intern (":server");
6157 staticpro (&QCserver
);
6158 QCnowait
= intern (":nowait");
6159 staticpro (&QCnowait
);
6160 QCsentinel
= intern (":sentinel");
6161 staticpro (&QCsentinel
);
6162 QClog
= intern (":log");
6164 QCnoquery
= intern (":noquery");
6165 staticpro (&QCnoquery
);
6166 QCstop
= intern (":stop");
6167 staticpro (&QCstop
);
6168 QCoptions
= intern (":options");
6169 staticpro (&QCoptions
);
6171 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
6172 staticpro (&Qlast_nonmenu_event
);
6174 staticpro (&Vprocess_alist
);
6176 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
6177 doc
: /* *Non-nil means delete processes immediately when they exit.
6178 nil means don't delete them until `list-processes' is run. */);
6180 delete_exited_processes
= 1;
6182 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
6183 doc
: /* Control type of device used to communicate with subprocesses.
6184 Values are nil to use a pipe, or t or `pty' to use a pty.
6185 The value has no effect if the system has no ptys or if all ptys are busy:
6186 then a pipe is used in any case.
6187 The value takes effect when `start-process' is called. */);
6188 Vprocess_connection_type
= Qt
;
6190 defsubr (&Sprocessp
);
6191 defsubr (&Sget_process
);
6192 defsubr (&Sget_buffer_process
);
6193 defsubr (&Sdelete_process
);
6194 defsubr (&Sprocess_status
);
6195 defsubr (&Sprocess_exit_status
);
6196 defsubr (&Sprocess_id
);
6197 defsubr (&Sprocess_name
);
6198 defsubr (&Sprocess_tty_name
);
6199 defsubr (&Sprocess_command
);
6200 defsubr (&Sset_process_buffer
);
6201 defsubr (&Sprocess_buffer
);
6202 defsubr (&Sprocess_mark
);
6203 defsubr (&Sset_process_filter
);
6204 defsubr (&Sprocess_filter
);
6205 defsubr (&Sset_process_sentinel
);
6206 defsubr (&Sprocess_sentinel
);
6207 defsubr (&Sset_process_window_size
);
6208 defsubr (&Sset_process_inherit_coding_system_flag
);
6209 defsubr (&Sprocess_inherit_coding_system_flag
);
6210 defsubr (&Sset_process_query_on_exit_flag
);
6211 defsubr (&Sprocess_query_on_exit_flag
);
6212 defsubr (&Sprocess_contact
);
6213 defsubr (&Slist_processes
);
6214 defsubr (&Sprocess_list
);
6215 defsubr (&Sstart_process
);
6217 defsubr (&Sset_network_process_options
);
6218 defsubr (&Smake_network_process
);
6219 #endif /* HAVE_SOCKETS */
6220 #ifdef DATAGRAM_SOCKETS
6221 defsubr (&Sprocess_datagram_address
);
6222 defsubr (&Sset_process_datagram_address
);
6224 defsubr (&Saccept_process_output
);
6225 defsubr (&Sprocess_send_region
);
6226 defsubr (&Sprocess_send_string
);
6227 defsubr (&Sinterrupt_process
);
6228 defsubr (&Skill_process
);
6229 defsubr (&Squit_process
);
6230 defsubr (&Sstop_process
);
6231 defsubr (&Scontinue_process
);
6232 defsubr (&Sprocess_running_child_p
);
6233 defsubr (&Sprocess_send_eof
);
6234 defsubr (&Ssignal_process
);
6235 defsubr (&Swaiting_for_user_input_p
);
6236 /* defsubr (&Sprocess_connection); */
6237 defsubr (&Sset_process_coding_system
);
6238 defsubr (&Sprocess_coding_system
);
6242 #else /* not subprocesses */
6244 #include <sys/types.h>
6248 #include "systime.h"
6249 #include "charset.h"
6251 #include "termopts.h"
6252 #include "sysselect.h"
6254 extern int frame_garbaged
;
6256 extern EMACS_TIME
timer_check ();
6257 extern int timers_run
;
6261 /* As described above, except assuming that there are no subprocesses:
6263 Wait for timeout to elapse and/or keyboard input to be available.
6266 timeout in seconds, or
6267 zero for no limit, or
6268 -1 means gobble data immediately available but don't wait for any.
6270 read_kbd is a Lisp_Object:
6271 0 to ignore keyboard input, or
6272 1 to return when input is available, or
6273 -1 means caller will actually read the input, so don't throw to
6275 a cons cell, meaning wait until its car is non-nil
6276 (and gobble terminal input into the buffer if any arrives), or
6277 We know that read_kbd will never be a Lisp_Process, since
6278 `subprocesses' isn't defined.
6280 do_display != 0 means redisplay should be done to show subprocess
6281 output that arrives.
6283 Return true iff we received input from any process. */
6286 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
6287 int time_limit
, microsecs
;
6288 Lisp_Object read_kbd
;
6292 EMACS_TIME end_time
, timeout
;
6293 SELECT_TYPE waitchannels
;
6295 /* Either nil or a cons cell, the car of which is of interest and
6296 may be changed outside of this routine. */
6297 Lisp_Object wait_for_cell
= Qnil
;
6299 /* If waiting for non-nil in a cell, record where. */
6300 if (CONSP (read_kbd
))
6302 wait_for_cell
= read_kbd
;
6303 XSETFASTINT (read_kbd
, 0);
6306 /* What does time_limit really mean? */
6307 if (time_limit
|| microsecs
)
6309 EMACS_GET_TIME (end_time
);
6310 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
6311 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6314 /* Turn off periodic alarms (in case they are in use)
6315 because the select emulator uses alarms. */
6316 turn_on_atimers (0);
6320 int timeout_reduced_for_timers
= 0;
6322 /* If calling from keyboard input, do not quit
6323 since we want to return C-g as an input character.
6324 Otherwise, do pending quit if requested. */
6325 if (XINT (read_kbd
) >= 0)
6328 /* Exit now if the cell we're waiting for became non-nil. */
6329 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6332 /* Compute time from now till when time limit is up */
6333 /* Exit if already run out */
6334 if (time_limit
== -1)
6336 /* -1 specified for timeout means
6337 gobble output available now
6338 but don't wait at all. */
6340 EMACS_SET_SECS_USECS (timeout
, 0, 0);
6342 else if (time_limit
|| microsecs
)
6344 EMACS_GET_TIME (timeout
);
6345 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6346 if (EMACS_TIME_NEG_P (timeout
))
6351 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
6354 /* If our caller will not immediately handle keyboard events,
6355 run timer events directly.
6356 (Callers that will immediately read keyboard events
6357 call timer_delay on their own.) */
6358 if (NILP (wait_for_cell
))
6360 EMACS_TIME timer_delay
;
6364 int old_timers_run
= timers_run
;
6365 timer_delay
= timer_check (1);
6366 if (timers_run
!= old_timers_run
&& do_display
)
6367 /* We must retry, since a timer may have requeued itself
6368 and that could alter the time delay. */
6369 redisplay_preserve_echo_area (14);
6373 while (!detect_input_pending ());
6375 /* If there is unread keyboard input, also return. */
6376 if (XINT (read_kbd
) != 0
6377 && requeued_events_pending_p ())
6380 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
6382 EMACS_TIME difference
;
6383 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
6384 if (EMACS_TIME_NEG_P (difference
))
6386 timeout
= timer_delay
;
6387 timeout_reduced_for_timers
= 1;
6392 /* Cause C-g and alarm signals to take immediate action,
6393 and cause input available signals to zero out timeout. */
6394 if (XINT (read_kbd
) < 0)
6395 set_waiting_for_input (&timeout
);
6397 /* Wait till there is something to do. */
6399 if (! XINT (read_kbd
) && NILP (wait_for_cell
))
6400 FD_ZERO (&waitchannels
);
6402 FD_SET (0, &waitchannels
);
6404 /* If a frame has been newly mapped and needs updating,
6405 reprocess its display stuff. */
6406 if (frame_garbaged
&& do_display
)
6408 clear_waiting_for_input ();
6409 redisplay_preserve_echo_area (15);
6410 if (XINT (read_kbd
) < 0)
6411 set_waiting_for_input (&timeout
);
6414 if (XINT (read_kbd
) && detect_input_pending ())
6417 FD_ZERO (&waitchannels
);
6420 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
6425 /* Make C-g and alarm signals set flags again */
6426 clear_waiting_for_input ();
6428 /* If we woke up due to SIGWINCH, actually change size now. */
6429 do_pending_window_change (0);
6431 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
6432 /* We waited the full specified time, so return now. */
6437 /* If the system call was interrupted, then go around the
6439 if (xerrno
== EINTR
)
6440 FD_ZERO (&waitchannels
);
6442 error ("select error: %s", emacs_strerror (xerrno
));
6445 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
6446 /* System sometimes fails to deliver SIGIO. */
6447 kill (getpid (), SIGIO
);
6450 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
6451 kill (getpid (), SIGIO
);
6454 /* Check for keyboard input */
6456 if ((XINT (read_kbd
) != 0)
6457 && detect_input_pending_run_timers (do_display
))
6459 swallow_events (do_display
);
6460 if (detect_input_pending_run_timers (do_display
))
6464 /* If there is unread keyboard input, also return. */
6465 if (XINT (read_kbd
) != 0
6466 && requeued_events_pending_p ())
6469 /* If wait_for_cell. check for keyboard input
6470 but don't run any timers.
6471 ??? (It seems wrong to me to check for keyboard
6472 input at all when wait_for_cell, but the code
6473 has been this way since July 1994.
6474 Try changing this after version 19.31.) */
6475 if (! NILP (wait_for_cell
)
6476 && detect_input_pending ())
6478 swallow_events (do_display
);
6479 if (detect_input_pending ())
6483 /* Exit now if the cell we're waiting for became non-nil. */
6484 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6494 /* Don't confuse make-docfile by having two doc strings for this function.
6495 make-docfile does not pay attention to #if, for good reason! */
6496 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
6499 register Lisp_Object name
;
6504 /* Don't confuse make-docfile by having two doc strings for this function.
6505 make-docfile does not pay attention to #if, for good reason! */
6506 DEFUN ("process-inherit-coding-system-flag",
6507 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
6511 register Lisp_Object process
;
6513 /* Ignore the argument and return the value of
6514 inherit-process-coding-system. */
6515 return inherit_process_coding_system
? Qt
: Qnil
;
6518 /* Kill all processes associated with `buffer'.
6519 If `buffer' is nil, kill all processes.
6520 Since we have no subprocesses, this does nothing. */
6523 kill_buffer_processes (buffer
)
6536 QCtype
= intern (":type");
6537 staticpro (&QCtype
);
6539 defsubr (&Sget_buffer_process
);
6540 defsubr (&Sprocess_inherit_coding_system_flag
);
6544 #endif /* not subprocesses */