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. */
26 /* This file is split into two parts by the following preprocessor
27 conditional. The 'then' clause contains all of the support for
28 asynchronous subprocesses. The 'else' clause contains stub
29 versions of some of the asynchronous subprocess routines that are
30 often called elsewhere in Emacs, so we don't have to #ifdef the
31 sections that call them. */
39 #include <sys/types.h> /* some typedefs are used in sys/file.h */
46 #if defined(WINDOWSNT) || defined(UNIX98_PTYS)
49 #endif /* not WINDOWSNT */
51 #ifdef HAVE_SOCKETS /* TCP connection support, if kernel can do it */
52 #include <sys/socket.h>
54 #include <netinet/in.h>
55 #include <arpa/inet.h>
56 #ifdef NEED_NET_ERRNO_H
57 #include <net/errno.h>
58 #endif /* NEED_NET_ERRNO_H */
60 /* Are local (unix) sockets supported? */
61 #if defined (HAVE_SYS_UN_H) && !defined (NO_SOCKETS_IN_FILE_SYSTEM)
62 #if !defined (AF_LOCAL) && defined (AF_UNIX)
63 #define AF_LOCAL AF_UNIX
66 #define HAVE_LOCAL_SOCKETS
70 #endif /* HAVE_SOCKETS */
72 /* TERM is a poor-man's SLIP, used on GNU/Linux. */
77 /* On some systems, e.g. DGUX, inet_addr returns a 'struct in_addr'. */
78 #ifdef HAVE_BROKEN_INET_ADDR
79 #define IN_ADDR struct in_addr
80 #define NUMERIC_ADDR_ERROR (numeric_addr.s_addr == -1)
82 #define IN_ADDR unsigned long
83 #define NUMERIC_ADDR_ERROR (numeric_addr == -1)
86 #if defined(BSD_SYSTEM) || defined(STRIDE)
87 #include <sys/ioctl.h>
88 #if !defined (O_NDELAY) && defined (HAVE_PTYS) && !defined(USG5)
90 #endif /* HAVE_PTYS and no O_NDELAY */
91 #endif /* BSD_SYSTEM || STRIDE */
93 #ifdef BROKEN_O_NONBLOCK
95 #endif /* BROKEN_O_NONBLOCK */
102 #include <sys/sysmacros.h> /* for "minor" */
103 #endif /* not IRIS */
106 #include <sys/wait.h>
118 #include "termhooks.h"
119 #include "termopts.h"
120 #include "commands.h"
121 #include "keyboard.h"
123 #include "blockinput.h"
124 #include "dispextern.h"
125 #include "composite.h"
128 Lisp_Object Qprocessp
;
129 Lisp_Object Qrun
, Qstop
, Qsignal
;
130 Lisp_Object Qopen
, Qclosed
, Qconnect
, Qfailed
, Qlisten
;
131 Lisp_Object Qlocal
, Qdatagram
;
132 Lisp_Object QCname
, QCbuffer
, QChost
, QCservice
, QCtype
;
133 Lisp_Object QClocal
, QCremote
, QCcoding
;
134 Lisp_Object QCserver
, QCnowait
, QCnoquery
, QCstop
;
135 Lisp_Object QCsentinel
, QClog
, QCoptions
;
136 Lisp_Object Qlast_nonmenu_event
;
137 /* QCfamily is declared and initialized in xfaces.c,
138 QCfilter in keyboard.c. */
139 extern Lisp_Object QCfamily
, QCfilter
;
141 /* Qexit is declared and initialized in eval.c. */
143 /* QCfamily is defined in xfaces.c. */
144 extern Lisp_Object QCfamily
;
145 /* QCfilter is defined in keyboard.c. */
146 extern Lisp_Object QCfilter
;
148 /* a process object is a network connection when its childp field is neither
149 Qt nor Qnil but is instead a cons cell (HOSTNAME PORTNUM). */
152 #define NETCONN_P(p) (GC_CONSP (XPROCESS (p)->childp))
153 #define NETCONN1_P(p) (GC_CONSP ((p)->childp))
155 #define NETCONN_P(p) 0
156 #define NETCONN1_P(p) 0
157 #endif /* HAVE_SOCKETS */
159 /* Define first descriptor number available for subprocesses. */
161 #define FIRST_PROC_DESC 1
163 #define FIRST_PROC_DESC 3
166 /* Define SIGCHLD as an alias for SIGCLD. There are many conditionals
169 #if !defined (SIGCHLD) && defined (SIGCLD)
170 #define SIGCHLD SIGCLD
173 #include "syssignal.h"
177 extern void set_waiting_for_input
P_ ((EMACS_TIME
*));
183 extern char *sys_errlist
[];
190 /* t means use pty, nil means use a pipe,
191 maybe other values to come. */
192 static Lisp_Object Vprocess_connection_type
;
196 #include <sys/socket.h>
200 /* These next two vars are non-static since sysdep.c uses them in the
201 emulation of `select'. */
202 /* Number of events of change of status of a process. */
204 /* Number of events for which the user or sentinel has been notified. */
207 /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */
209 #ifdef BROKEN_NON_BLOCKING_CONNECT
210 #undef NON_BLOCKING_CONNECT
212 #ifndef NON_BLOCKING_CONNECT
215 #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX)
216 #if defined (O_NONBLOCK) || defined (O_NDELAY)
217 #if defined (EWOULDBLOCK) || defined (EINPROGRESS)
218 #define NON_BLOCKING_CONNECT
219 #endif /* EWOULDBLOCK || EINPROGRESS */
220 #endif /* O_NONBLOCK || O_NDELAY */
221 #endif /* HAVE_GETPEERNAME || GNU_LINUX */
222 #endif /* HAVE_SELECT */
223 #endif /* HAVE_SOCKETS */
224 #endif /* NON_BLOCKING_CONNECT */
225 #endif /* BROKEN_NON_BLOCKING_CONNECT */
227 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
228 this system. We need to read full packets, so we need a
229 "non-destructive" select. So we require either native select,
230 or emulation of select using FIONREAD. */
232 #ifdef BROKEN_DATAGRAM_SOCKETS
233 #undef DATAGRAM_SOCKETS
235 #ifndef DATAGRAM_SOCKETS
237 #if defined (HAVE_SELECT) || defined (FIONREAD)
238 #if defined (HAVE_SENDTO) && defined (HAVE_RECVFROM) && defined (EMSGSIZE)
239 #define DATAGRAM_SOCKETS
240 #endif /* HAVE_SENDTO && HAVE_RECVFROM && EMSGSIZE */
241 #endif /* HAVE_SELECT || FIONREAD */
242 #endif /* HAVE_SOCKETS */
243 #endif /* DATAGRAM_SOCKETS */
244 #endif /* BROKEN_DATAGRAM_SOCKETS */
247 #undef NON_BLOCKING_CONNECT
248 #undef DATAGRAM_SOCKETS
252 #include "sysselect.h"
254 extern int keyboard_bit_set
P_ ((SELECT_TYPE
*));
256 /* If we support a window system, turn on the code to poll periodically
257 to detect C-g. It isn't actually used when doing interrupt input. */
258 #ifdef HAVE_WINDOW_SYSTEM
259 #define POLL_FOR_INPUT
262 /* Mask of bits indicating the descriptors that we wait for input on. */
264 static SELECT_TYPE input_wait_mask
;
266 /* Mask that excludes keyboard input descriptor (s). */
268 static SELECT_TYPE non_keyboard_wait_mask
;
270 /* Mask that excludes process input descriptor (s). */
272 static SELECT_TYPE non_process_wait_mask
;
274 /* Mask of bits indicating the descriptors that we wait for connect to
275 complete on. Once they complete, they are removed from this mask
276 and added to the input_wait_mask and non_keyboard_wait_mask. */
278 static SELECT_TYPE connect_wait_mask
;
280 /* Number of bits set in connect_wait_mask. */
281 static int num_pending_connects
;
283 /* The largest descriptor currently in use for a process object. */
284 static int max_process_desc
;
286 /* The largest descriptor currently in use for keyboard input. */
287 static int max_keyboard_desc
;
289 /* Nonzero means delete a process right away if it exits. */
290 static int delete_exited_processes
;
292 /* Indexed by descriptor, gives the process (if any) for that descriptor */
293 Lisp_Object chan_process
[MAXDESC
];
295 /* Alist of elements (NAME . PROCESS) */
296 Lisp_Object Vprocess_alist
;
298 /* Buffered-ahead input char from process, indexed by channel.
299 -1 means empty (no char is buffered).
300 Used on sys V where the only way to tell if there is any
301 output from the process is to read at least one char.
302 Always -1 on systems that support FIONREAD. */
304 /* Don't make static; need to access externally. */
305 int proc_buffered_char
[MAXDESC
];
307 /* Table of `struct coding-system' for each process. */
308 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
309 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
311 #ifdef DATAGRAM_SOCKETS
312 /* Table of `partner address' for datagram sockets. */
313 struct sockaddr_and_len
{
316 } datagram_address
[MAXDESC
];
317 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
318 #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XINT (XPROCESS (proc)->infd)].sa != 0)
320 #define DATAGRAM_CHAN_P(chan) (0)
321 #define DATAGRAM_CONN_P(proc) (0)
324 static Lisp_Object
get_process ();
325 static void exec_sentinel ();
327 extern EMACS_TIME
timer_check ();
328 extern int timers_run
;
330 /* Maximum number of bytes to send to a pty without an eof. */
331 static int pty_max_bytes
;
333 extern Lisp_Object Vfile_name_coding_system
, Vdefault_file_name_coding_system
;
339 /* The file name of the pty opened by allocate_pty. */
341 static char pty_name
[24];
344 /* Compute the Lisp form of the process status, p->status, from
345 the numeric status that was returned by `wait'. */
347 Lisp_Object
status_convert ();
351 struct Lisp_Process
*p
;
353 union { int i
; WAITTYPE wt
; } u
;
354 u
.i
= XFASTINT (p
->raw_status_low
) + (XFASTINT (p
->raw_status_high
) << 16);
355 p
->status
= status_convert (u
.wt
);
356 p
->raw_status_low
= Qnil
;
357 p
->raw_status_high
= Qnil
;
360 /* Convert a process status word in Unix format to
361 the list that we use internally. */
368 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
369 else if (WIFEXITED (w
))
370 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
371 WCOREDUMP (w
) ? Qt
: Qnil
));
372 else if (WIFSIGNALED (w
))
373 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
374 WCOREDUMP (w
) ? Qt
: Qnil
));
379 /* Given a status-list, extract the three pieces of information
380 and store them individually through the three pointers. */
383 decode_status (l
, symbol
, code
, coredump
)
401 *code
= XFASTINT (XCAR (tem
));
403 *coredump
= !NILP (tem
);
407 /* Return a string describing a process status list. */
410 status_message (status
)
415 Lisp_Object string
, string2
;
417 decode_status (status
, &symbol
, &code
, &coredump
);
419 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
422 synchronize_system_messages_locale ();
423 signame
= strsignal (code
);
426 string
= build_string (signame
);
427 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
428 SSET (string
, 0, DOWNCASE (SREF (string
, 0)));
429 return concat2 (string
, string2
);
431 else if (EQ (symbol
, Qexit
))
434 return build_string ("finished\n");
435 string
= Fnumber_to_string (make_number (code
));
436 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
437 return concat3 (build_string ("exited abnormally with code "),
440 else if (EQ (symbol
, Qfailed
))
442 string
= Fnumber_to_string (make_number (code
));
443 string2
= build_string ("\n");
444 return concat3 (build_string ("failed with code "),
448 return Fcopy_sequence (Fsymbol_name (symbol
));
453 /* Open an available pty, returning a file descriptor.
454 Return -1 on failure.
455 The file name of the terminal corresponding to the pty
456 is left in the variable pty_name. */
465 /* Some systems name their pseudoterminals so that there are gaps in
466 the usual sequence - for example, on HP9000/S700 systems, there
467 are no pseudoterminals with names ending in 'f'. So we wait for
468 three failures in a row before deciding that we've reached the
470 int failed_count
= 0;
475 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
476 for (i
= 0; i
< 16; i
++)
479 #ifdef PTY_NAME_SPRINTF
482 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
483 #endif /* no PTY_NAME_SPRINTF */
487 #else /* no PTY_OPEN */
489 /* Unusual IRIS code */
490 *ptyv
= emacs_open ("/dev/ptc", O_RDWR
| O_NDELAY
, 0);
493 if (fstat (fd
, &stb
) < 0)
496 if (stat (pty_name
, &stb
) < 0)
499 if (failed_count
>= 3)
505 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
507 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
509 #endif /* not IRIS */
510 #endif /* no PTY_OPEN */
514 /* check to make certain that both sides are available
515 this avoids a nasty yet stupid bug in rlogins */
516 #ifdef PTY_TTY_NAME_SPRINTF
519 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
520 #endif /* no PTY_TTY_NAME_SPRINTF */
522 if (access (pty_name
, 6) != 0)
525 #if !defined(IRIS) && !defined(__sgi)
531 #endif /* not UNIPLUS */
538 #endif /* HAVE_PTYS */
544 register Lisp_Object val
, tem
, name1
;
545 register struct Lisp_Process
*p
;
549 p
= allocate_process ();
551 XSETINT (p
->infd
, -1);
552 XSETINT (p
->outfd
, -1);
553 XSETFASTINT (p
->pid
, 0);
554 XSETFASTINT (p
->tick
, 0);
555 XSETFASTINT (p
->update_tick
, 0);
556 p
->raw_status_low
= Qnil
;
557 p
->raw_status_high
= Qnil
;
559 p
->mark
= Fmake_marker ();
561 /* If name is already in use, modify it until it is unused. */
566 tem
= Fget_process (name1
);
567 if (NILP (tem
)) break;
568 sprintf (suffix
, "<%d>", i
);
569 name1
= concat2 (name
, build_string (suffix
));
573 XSETPROCESS (val
, p
);
574 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
579 remove_process (proc
)
580 register Lisp_Object proc
;
582 register Lisp_Object pair
;
584 pair
= Frassq (proc
, Vprocess_alist
);
585 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
587 deactivate_process (proc
);
590 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
591 doc
: /* Return t if OBJECT is a process. */)
595 return PROCESSP (object
) ? Qt
: Qnil
;
598 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
599 doc
: /* Return the process named NAME, or nil if there is none. */)
601 register Lisp_Object name
;
606 return Fcdr (Fassoc (name
, Vprocess_alist
));
609 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
610 doc
: /* Return the (or a) process associated with BUFFER.
611 BUFFER may be a buffer or the name of one. */)
613 register Lisp_Object buffer
;
615 register Lisp_Object buf
, tail
, proc
;
617 if (NILP (buffer
)) return Qnil
;
618 buf
= Fget_buffer (buffer
);
619 if (NILP (buf
)) return Qnil
;
621 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
623 proc
= Fcdr (Fcar (tail
));
624 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
630 /* This is how commands for the user decode process arguments. It
631 accepts a process, a process name, a buffer, a buffer name, or nil.
632 Buffers denote the first process in the buffer, and nil denotes the
637 register Lisp_Object name
;
639 register Lisp_Object proc
, obj
;
642 obj
= Fget_process (name
);
644 obj
= Fget_buffer (name
);
646 error ("Process %s does not exist", SDATA (name
));
648 else if (NILP (name
))
649 obj
= Fcurrent_buffer ();
653 /* Now obj should be either a buffer object or a process object.
657 proc
= Fget_buffer_process (obj
);
659 error ("Buffer %s has no process", SDATA (XBUFFER (obj
)->name
));
669 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
670 doc
: /* Delete PROCESS: kill it and forget about it immediately.
671 PROCESS may be a process, a buffer, the name of a process or buffer, or
672 nil, indicating the current buffer's process. */)
674 register Lisp_Object process
;
676 process
= get_process (process
);
677 XPROCESS (process
)->raw_status_low
= Qnil
;
678 XPROCESS (process
)->raw_status_high
= Qnil
;
679 if (NETCONN_P (process
))
681 XPROCESS (process
)->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
682 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
684 else if (XINT (XPROCESS (process
)->infd
) >= 0)
686 Fkill_process (process
, Qnil
);
687 /* Do this now, since remove_process will make sigchld_handler do nothing. */
688 XPROCESS (process
)->status
689 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
690 XSETINT (XPROCESS (process
)->tick
, ++process_tick
);
693 remove_process (process
);
697 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
698 doc
: /* Return the status of PROCESS.
699 The returned value is one of the following symbols:
700 run -- for a process that is running.
701 stop -- for a process stopped but continuable.
702 exit -- for a process that has exited.
703 signal -- for a process that has got a fatal signal.
704 open -- for a network stream connection that is open.
705 listen -- for a network stream server that is listening.
706 closed -- for a network stream connection that is closed.
707 connect -- when waiting for a non-blocking connection to complete.
708 failed -- when a non-blocking connection has failed.
709 nil -- if arg is a process name and no such process exists.
710 PROCESS may be a process, a buffer, the name of a process, or
711 nil, indicating the current buffer's process. */)
713 register Lisp_Object process
;
715 register struct Lisp_Process
*p
;
716 register Lisp_Object status
;
718 if (STRINGP (process
))
719 process
= Fget_process (process
);
721 process
= get_process (process
);
726 p
= XPROCESS (process
);
727 if (!NILP (p
->raw_status_low
))
731 status
= XCAR (status
);
734 if (EQ (status
, Qexit
))
736 else if (EQ (p
->command
, Qt
))
738 else if (EQ (status
, Qrun
))
744 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
746 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
747 If PROCESS has not yet exited or died, return 0. */)
749 register Lisp_Object process
;
751 CHECK_PROCESS (process
);
752 if (!NILP (XPROCESS (process
)->raw_status_low
))
753 update_status (XPROCESS (process
));
754 if (CONSP (XPROCESS (process
)->status
))
755 return XCAR (XCDR (XPROCESS (process
)->status
));
756 return make_number (0);
759 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
760 doc
: /* Return the process id of PROCESS.
761 This is the pid of the Unix process which PROCESS uses or talks to.
762 For a network connection, this value is nil. */)
764 register Lisp_Object process
;
766 CHECK_PROCESS (process
);
767 return XPROCESS (process
)->pid
;
770 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
771 doc
: /* Return the name of PROCESS, as a string.
772 This is the name of the program invoked in PROCESS,
773 possibly modified to make it unique among process names. */)
775 register Lisp_Object process
;
777 CHECK_PROCESS (process
);
778 return XPROCESS (process
)->name
;
781 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
782 doc
: /* Return the command that was executed to start PROCESS.
783 This is a list of strings, the first string being the program executed
784 and the rest of the strings being the arguments given to it.
785 For a non-child channel, this is nil. */)
787 register Lisp_Object process
;
789 CHECK_PROCESS (process
);
790 return XPROCESS (process
)->command
;
793 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
794 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
795 This is the terminal that the process itself reads and writes on,
796 not the name of the pty that Emacs uses to talk with that terminal. */)
798 register Lisp_Object process
;
800 CHECK_PROCESS (process
);
801 return XPROCESS (process
)->tty_name
;
804 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
806 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil). */)
808 register Lisp_Object process
, buffer
;
810 struct Lisp_Process
*p
;
812 CHECK_PROCESS (process
);
814 CHECK_BUFFER (buffer
);
815 p
= XPROCESS (process
);
818 p
->childp
= Fplist_put (p
->childp
, QCbuffer
, buffer
);
822 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
824 doc
: /* Return the buffer PROCESS is associated with.
825 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
827 register Lisp_Object process
;
829 CHECK_PROCESS (process
);
830 return XPROCESS (process
)->buffer
;
833 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
835 doc
: /* Return the marker for the end of the last output from PROCESS. */)
837 register Lisp_Object process
;
839 CHECK_PROCESS (process
);
840 return XPROCESS (process
)->mark
;
843 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
845 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
846 t means stop accepting output from the process.
847 When a process has a filter, each time it does output
848 the entire string of output is passed to the filter.
849 The filter gets two arguments: the process and the string of output.
850 If the process has a filter, its buffer is not used for output. */)
852 register Lisp_Object process
, filter
;
854 struct Lisp_Process
*p
;
856 CHECK_PROCESS (process
);
857 p
= XPROCESS (process
);
859 /* Don't signal an error if the process' input file descriptor
860 is closed. This could make debugging Lisp more difficult,
861 for example when doing something like
863 (setq process (start-process ...))
865 (set-process-filter process ...) */
867 if (XINT (p
->infd
) >= 0)
869 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
871 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
872 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
874 else if (EQ (p
->filter
, Qt
)
875 && !EQ (p
->command
, Qt
)) /* Network process not stopped. */
877 FD_SET (XINT (p
->infd
), &input_wait_mask
);
878 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
884 p
->childp
= Fplist_put (p
->childp
, QCfilter
, filter
);
888 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
890 doc
: /* Returns the filter function of PROCESS; nil if none.
891 See `set-process-filter' for more info on filter functions. */)
893 register Lisp_Object process
;
895 CHECK_PROCESS (process
);
896 return XPROCESS (process
)->filter
;
899 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
901 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
902 The sentinel is called as a function when the process changes state.
903 It gets two arguments: the process, and a string describing the change. */)
905 register Lisp_Object process
, sentinel
;
907 CHECK_PROCESS (process
);
908 XPROCESS (process
)->sentinel
= sentinel
;
912 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
914 doc
: /* Return the sentinel of PROCESS; nil if none.
915 See `set-process-sentinel' for more info on sentinels. */)
917 register Lisp_Object process
;
919 CHECK_PROCESS (process
);
920 return XPROCESS (process
)->sentinel
;
923 DEFUN ("set-process-window-size", Fset_process_window_size
,
924 Sset_process_window_size
, 3, 3, 0,
925 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
926 (process
, height
, width
)
927 register Lisp_Object process
, height
, width
;
929 CHECK_PROCESS (process
);
930 CHECK_NATNUM (height
);
931 CHECK_NATNUM (width
);
933 if (XINT (XPROCESS (process
)->infd
) < 0
934 || set_window_size (XINT (XPROCESS (process
)->infd
),
935 XINT (height
), XINT (width
)) <= 0)
941 DEFUN ("set-process-inherit-coding-system-flag",
942 Fset_process_inherit_coding_system_flag
,
943 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
944 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
945 If the second argument FLAG is non-nil, then the variable
946 `buffer-file-coding-system' of the buffer associated with PROCESS
947 will be bound to the value of the coding system used to decode
950 This is useful when the coding system specified for the process buffer
951 leaves either the character code conversion or the end-of-line conversion
952 unspecified, or if the coding system used to decode the process output
953 is more appropriate for saving the process buffer.
955 Binding the variable `inherit-process-coding-system' to non-nil before
956 starting the process is an alternative way of setting the inherit flag
957 for the process which will run. */)
959 register Lisp_Object process
, flag
;
961 CHECK_PROCESS (process
);
962 XPROCESS (process
)->inherit_coding_system_flag
= flag
;
966 DEFUN ("process-inherit-coding-system-flag",
967 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
969 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
970 If this flag is t, `buffer-file-coding-system' of the buffer
971 associated with PROCESS will inherit the coding system used to decode
972 the process output. */)
974 register Lisp_Object process
;
976 CHECK_PROCESS (process
);
977 return XPROCESS (process
)->inherit_coding_system_flag
;
980 DEFUN ("set-process-query-on-exit-flag",
981 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
983 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
984 If the second argument FLAG is non-nil, emacs will query the user before
985 exiting if PROCESS is running. */)
987 register Lisp_Object process
, flag
;
989 CHECK_PROCESS (process
);
990 XPROCESS (process
)->kill_without_query
= Fnull (flag
);
994 DEFUN ("process-query-on-exit-flag",
995 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
997 doc
: /* Return the current value of query on exit flag for PROCESS. */)
999 register Lisp_Object process
;
1001 CHECK_PROCESS (process
);
1002 return Fnull (XPROCESS (process
)->kill_without_query
);
1005 #ifdef DATAGRAM_SOCKETS
1006 Lisp_Object
Fprocess_datagram_address ();
1009 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1011 doc
: /* Return the contact info of PROCESS; t for a real child.
1012 For a net connection, the value depends on the optional KEY arg.
1013 If KEY is nil, value is a cons cell of the form (HOST SERVICE),
1014 if KEY is t, the complete contact information for the connection is
1015 returned, else the specific value for the keyword KEY is returned.
1016 See `make-network-process' for a list of keywords. */)
1018 register Lisp_Object process
, key
;
1020 Lisp_Object contact
;
1022 CHECK_PROCESS (process
);
1023 contact
= XPROCESS (process
)->childp
;
1025 #ifdef DATAGRAM_SOCKETS
1026 if (DATAGRAM_CONN_P (process
)
1027 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1028 contact
= Fplist_put (contact
, QCremote
,
1029 Fprocess_datagram_address (process
));
1032 if (!NETCONN_P (process
) || EQ (key
, Qt
))
1035 return Fcons (Fplist_get (contact
, QChost
),
1036 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1037 return Fplist_get (contact
, key
);
1040 #if 0 /* Turned off because we don't currently record this info
1041 in the process. Perhaps add it. */
1042 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1043 doc
: /* Return the connection type of PROCESS.
1044 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1045 a socket connection. */)
1047 Lisp_Object process
;
1049 return XPROCESS (process
)->type
;
1054 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1056 doc
: /* Convert network ADDRESS from internal format to a string.
1057 If optional second argument OMIT-PORT is non-nil, don't include a port
1058 number in the string; in this case, interpret a 4 element vector as an
1059 IP address. Returns nil if format of ADDRESS is invalid. */)
1060 (address
, omit_port
)
1061 Lisp_Object address
, omit_port
;
1066 if (STRINGP (address
)) /* AF_LOCAL */
1069 if (VECTORP (address
)) /* AF_INET */
1071 register struct Lisp_Vector
*p
= XVECTOR (address
);
1072 Lisp_Object args
[6];
1075 if (!NILP (omit_port
) && (p
->size
== 4 || p
->size
== 5))
1077 args
[0] = build_string ("%d.%d.%d.%d");
1080 else if (p
->size
== 5)
1082 args
[0] = build_string ("%d.%d.%d.%d:%d");
1088 for (i
= 0; i
< nargs
; i
++)
1089 args
[i
+1] = p
->contents
[i
];
1090 return Fformat (nargs
+1, args
);
1093 if (CONSP (address
))
1095 Lisp_Object args
[2];
1096 args
[0] = build_string ("<Family %d>");
1097 args
[1] = Fcar (address
);
1098 return Fformat (2, args
);
1107 list_processes_1 (query_only
)
1108 Lisp_Object query_only
;
1110 register Lisp_Object tail
, tem
;
1111 Lisp_Object proc
, minspace
, tem1
;
1112 register struct Lisp_Process
*p
;
1114 int w_proc
, w_buffer
, w_tty
;
1115 Lisp_Object i_status
, i_buffer
, i_tty
, i_command
;
1117 w_proc
= 4; /* Proc */
1118 w_buffer
= 6; /* Buffer */
1119 w_tty
= 0; /* Omit if no ttys */
1121 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
1125 proc
= Fcdr (Fcar (tail
));
1126 p
= XPROCESS (proc
);
1127 if (NILP (p
->childp
))
1129 if (!NILP (query_only
) && !NILP (p
->kill_without_query
))
1131 if (STRINGP (p
->name
)
1132 && ( i
= SCHARS (p
->name
), (i
> w_proc
)))
1134 if (!NILP (p
->buffer
))
1136 if (NILP (XBUFFER (p
->buffer
)->name
) && w_buffer
< 8)
1137 w_buffer
= 8; /* (Killed) */
1138 else if ((i
= SCHARS (XBUFFER (p
->buffer
)->name
), (i
> w_buffer
)))
1141 if (STRINGP (p
->tty_name
)
1142 && (i
= SCHARS (p
->tty_name
), (i
> w_tty
)))
1146 XSETFASTINT (i_status
, w_proc
+ 1);
1147 XSETFASTINT (i_buffer
, XFASTINT (i_status
) + 9);
1150 XSETFASTINT (i_tty
, XFASTINT (i_buffer
) + w_buffer
+ 1);
1151 XSETFASTINT (i_command
, XFASTINT (i_buffer
) + w_tty
+ 1);
1154 XSETFASTINT (i_command
, XFASTINT (i_buffer
) + w_buffer
+ 1);
1157 XSETFASTINT (minspace
, 1);
1159 set_buffer_internal (XBUFFER (Vstandard_output
));
1160 Fbuffer_disable_undo (Vstandard_output
);
1162 current_buffer
->truncate_lines
= Qt
;
1164 write_string ("Proc", -1);
1165 Findent_to (i_status
, minspace
); write_string ("Status", -1);
1166 Findent_to (i_buffer
, minspace
); write_string ("Buffer", -1);
1169 Findent_to (i_tty
, minspace
); write_string ("Tty", -1);
1171 Findent_to (i_command
, minspace
); write_string ("Command", -1);
1172 write_string ("\n", -1);
1174 write_string ("----", -1);
1175 Findent_to (i_status
, minspace
); write_string ("------", -1);
1176 Findent_to (i_buffer
, minspace
); write_string ("------", -1);
1179 Findent_to (i_tty
, minspace
); write_string ("---", -1);
1181 Findent_to (i_command
, minspace
); write_string ("-------", -1);
1182 write_string ("\n", -1);
1184 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
1188 proc
= Fcdr (Fcar (tail
));
1189 p
= XPROCESS (proc
);
1190 if (NILP (p
->childp
))
1192 if (!NILP (query_only
) && !NILP (p
->kill_without_query
))
1195 Finsert (1, &p
->name
);
1196 Findent_to (i_status
, minspace
);
1198 if (!NILP (p
->raw_status_low
))
1201 if (CONSP (p
->status
))
1202 symbol
= XCAR (p
->status
);
1205 if (EQ (symbol
, Qsignal
))
1208 tem
= Fcar (Fcdr (p
->status
));
1210 if (XINT (tem
) < NSIG
)
1211 write_string (sys_errlist
[XINT (tem
)], -1);
1214 Fprinc (symbol
, Qnil
);
1216 else if (NETCONN1_P (p
))
1218 if (EQ (symbol
, Qexit
))
1219 write_string ("closed", -1);
1220 else if (EQ (p
->command
, Qt
))
1221 write_string ("stopped", -1);
1222 else if (EQ (symbol
, Qrun
))
1223 write_string ("open", -1);
1225 Fprinc (symbol
, Qnil
);
1228 Fprinc (symbol
, Qnil
);
1230 if (EQ (symbol
, Qexit
))
1233 tem
= Fcar (Fcdr (p
->status
));
1236 sprintf (tembuf
, " %d", (int) XFASTINT (tem
));
1237 write_string (tembuf
, -1);
1241 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
1242 remove_process (proc
);
1244 Findent_to (i_buffer
, minspace
);
1245 if (NILP (p
->buffer
))
1246 insert_string ("(none)");
1247 else if (NILP (XBUFFER (p
->buffer
)->name
))
1248 insert_string ("(Killed)");
1250 Finsert (1, &XBUFFER (p
->buffer
)->name
);
1254 Findent_to (i_tty
, minspace
);
1255 if (STRINGP (p
->tty_name
))
1256 Finsert (1, &p
->tty_name
);
1259 Findent_to (i_command
, minspace
);
1261 if (EQ (p
->status
, Qlisten
))
1263 Lisp_Object port
= Fplist_get (p
->childp
, QCservice
);
1264 if (INTEGERP (port
))
1265 port
= Fnumber_to_string (port
);
1267 port
= Fformat_network_address (Fplist_get (p
->childp
, QClocal
), Qnil
);
1268 sprintf (tembuf
, "(network %s server on %s)\n",
1269 (DATAGRAM_CHAN_P (XINT (p
->infd
)) ? "datagram" : "stream"),
1270 (STRINGP (port
) ? (char *)SDATA (port
) : "?"));
1271 insert_string (tembuf
);
1273 else if (NETCONN1_P (p
))
1275 /* For a local socket, there is no host name,
1276 so display service instead. */
1277 Lisp_Object host
= Fplist_get (p
->childp
, QChost
);
1278 if (!STRINGP (host
))
1280 host
= Fplist_get (p
->childp
, QCservice
);
1281 if (INTEGERP (host
))
1282 host
= Fnumber_to_string (host
);
1285 host
= Fformat_network_address (Fplist_get (p
->childp
, QCremote
), Qnil
);
1286 sprintf (tembuf
, "(network %s connection to %s)\n",
1287 (DATAGRAM_CHAN_P (XINT (p
->infd
)) ? "datagram" : "stream"),
1288 (STRINGP (host
) ? (char *)SDATA (host
) : "?"));
1289 insert_string (tembuf
);
1301 insert_string (" ");
1303 insert_string ("\n");
1309 DEFUN ("list-processes", Flist_processes
, Slist_processes
, 0, 1, "P",
1310 doc
: /* Display a list of all processes.
1311 If optional argument QUERY-ONLY is non-nil, only processes with
1312 the query-on-exit flag set will be listed.
1313 Any process listed as exited or signaled is actually eliminated
1314 after the listing is made. */)
1316 Lisp_Object query_only
;
1318 internal_with_output_to_temp_buffer ("*Process List*",
1319 list_processes_1
, query_only
);
1323 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1324 doc
: /* Return a list of all processes. */)
1327 return Fmapcar (Qcdr
, Vprocess_alist
);
1330 /* Starting asynchronous inferior processes. */
1332 static Lisp_Object
start_process_unwind ();
1334 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1335 doc
: /* Start a program in a subprocess. Return the process object for it.
1336 NAME is name for process. It is modified if necessary to make it unique.
1337 BUFFER is the buffer or (buffer-name) to associate with the process.
1338 Process output goes at end of that buffer, unless you specify
1339 an output stream or filter function to handle the output.
1340 BUFFER may be also nil, meaning that this process is not associated
1342 Third arg is program file name. It is searched for in PATH.
1343 Remaining arguments are strings to give program as arguments.
1345 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1348 register Lisp_Object
*args
;
1350 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1352 register unsigned char *new_argv
;
1355 register unsigned char **new_argv
;
1358 int count
= SPECPDL_INDEX ();
1362 buffer
= Fget_buffer_create (buffer
);
1364 /* Make sure that the child will be able to chdir to the current
1365 buffer's current directory, or its unhandled equivalent. We
1366 can't just have the child check for an error when it does the
1367 chdir, since it's in a vfork.
1369 We have to GCPRO around this because Fexpand_file_name and
1370 Funhandled_file_name_directory might call a file name handling
1371 function. The argument list is protected by the caller, so all
1372 we really have to worry about is buffer. */
1374 struct gcpro gcpro1
, gcpro2
;
1376 current_dir
= current_buffer
->directory
;
1378 GCPRO2 (buffer
, current_dir
);
1381 = expand_and_dir_to_file (Funhandled_file_name_directory (current_dir
),
1383 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1384 report_file_error ("Setting current directory",
1385 Fcons (current_buffer
->directory
, Qnil
));
1391 CHECK_STRING (name
);
1395 CHECK_STRING (program
);
1397 proc
= make_process (name
);
1398 /* If an error occurs and we can't start the process, we want to
1399 remove it from the process list. This means that each error
1400 check in create_process doesn't need to call remove_process
1401 itself; it's all taken care of here. */
1402 record_unwind_protect (start_process_unwind
, proc
);
1404 XPROCESS (proc
)->childp
= Qt
;
1405 XPROCESS (proc
)->command_channel_p
= Qnil
;
1406 XPROCESS (proc
)->buffer
= buffer
;
1407 XPROCESS (proc
)->sentinel
= Qnil
;
1408 XPROCESS (proc
)->filter
= Qnil
;
1409 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1411 /* Make the process marker point into the process buffer (if any). */
1413 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1414 BUF_ZV (XBUFFER (buffer
)),
1415 BUF_ZV_BYTE (XBUFFER (buffer
)));
1418 /* Decide coding systems for communicating with the process. Here
1419 we don't setup the structure coding_system nor pay attention to
1420 unibyte mode. They are done in create_process. */
1422 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1423 Lisp_Object coding_systems
= Qt
;
1424 Lisp_Object val
, *args2
;
1425 struct gcpro gcpro1
, gcpro2
;
1427 val
= Vcoding_system_for_read
;
1430 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1431 args2
[0] = Qstart_process
;
1432 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1433 GCPRO2 (proc
, current_dir
);
1434 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1436 if (CONSP (coding_systems
))
1437 val
= XCAR (coding_systems
);
1438 else if (CONSP (Vdefault_process_coding_system
))
1439 val
= XCAR (Vdefault_process_coding_system
);
1441 XPROCESS (proc
)->decode_coding_system
= val
;
1443 val
= Vcoding_system_for_write
;
1446 if (EQ (coding_systems
, Qt
))
1448 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof args2
);
1449 args2
[0] = Qstart_process
;
1450 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1451 GCPRO2 (proc
, current_dir
);
1452 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1455 if (CONSP (coding_systems
))
1456 val
= XCDR (coding_systems
);
1457 else if (CONSP (Vdefault_process_coding_system
))
1458 val
= XCDR (Vdefault_process_coding_system
);
1460 XPROCESS (proc
)->encode_coding_system
= val
;
1464 /* Make a one member argv with all args concatenated
1465 together separated by a blank. */
1466 len
= SBYTES (program
) + 2;
1467 for (i
= 3; i
< nargs
; i
++)
1471 len
+= SBYTES (tem
) + 1; /* count the blank */
1473 new_argv
= (unsigned char *) alloca (len
);
1474 strcpy (new_argv
, SDATA (program
));
1475 for (i
= 3; i
< nargs
; i
++)
1479 strcat (new_argv
, " ");
1480 strcat (new_argv
, SDATA (tem
));
1482 /* Need to add code here to check for program existence on VMS */
1485 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1487 /* If program file name is not absolute, search our path for it.
1488 Put the name we will really use in TEM. */
1489 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1490 && !(SCHARS (program
) > 1
1491 && IS_DEVICE_SEP (SREF (program
, 1))))
1493 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1496 GCPRO4 (name
, program
, buffer
, current_dir
);
1497 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1500 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1501 tem
= Fexpand_file_name (tem
, Qnil
);
1505 if (!NILP (Ffile_directory_p (program
)))
1506 error ("Specified program for new process is a directory");
1510 /* If program file name starts with /: for quoting a magic name,
1512 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1513 && SREF (tem
, 1) == ':')
1514 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1516 /* Encode the file name and put it in NEW_ARGV.
1517 That's where the child will use it to execute the program. */
1518 tem
= ENCODE_FILE (tem
);
1519 new_argv
[0] = SDATA (tem
);
1521 /* Here we encode arguments by the coding system used for sending
1522 data to the process. We don't support using different coding
1523 systems for encoding arguments and for encoding data sent to the
1526 for (i
= 3; i
< nargs
; i
++)
1530 if (STRING_MULTIBYTE (tem
))
1531 tem
= (code_convert_string_norecord
1532 (tem
, XPROCESS (proc
)->encode_coding_system
, 1));
1533 new_argv
[i
- 2] = SDATA (tem
);
1535 new_argv
[i
- 2] = 0;
1536 #endif /* not VMS */
1538 XPROCESS (proc
)->decoding_buf
= make_uninit_string (0);
1539 XPROCESS (proc
)->decoding_carryover
= make_number (0);
1540 XPROCESS (proc
)->encoding_buf
= make_uninit_string (0);
1541 XPROCESS (proc
)->encoding_carryover
= make_number (0);
1543 XPROCESS (proc
)->inherit_coding_system_flag
1544 = (NILP (buffer
) || !inherit_process_coding_system
1547 create_process (proc
, (char **) new_argv
, current_dir
);
1549 return unbind_to (count
, proc
);
1552 /* This function is the unwind_protect form for Fstart_process. If
1553 PROC doesn't have its pid set, then we know someone has signaled
1554 an error and the process wasn't started successfully, so we should
1555 remove it from the process list. */
1557 start_process_unwind (proc
)
1560 if (!PROCESSP (proc
))
1563 /* Was PROC started successfully? */
1564 if (XINT (XPROCESS (proc
)->pid
) <= 0)
1565 remove_process (proc
);
1571 create_process_1 (timer
)
1572 struct atimer
*timer
;
1574 /* Nothing to do. */
1578 #if 0 /* This doesn't work; see the note before sigchld_handler. */
1581 /* Mimic blocking of signals on system V, which doesn't really have it. */
1583 /* Nonzero means we got a SIGCHLD when it was supposed to be blocked. */
1584 int sigchld_deferred
;
1587 create_process_sigchld ()
1589 signal (SIGCHLD
, create_process_sigchld
);
1591 sigchld_deferred
= 1;
1597 #ifndef VMS /* VMS version of this function is in vmsproc.c. */
1599 create_process (process
, new_argv
, current_dir
)
1600 Lisp_Object process
;
1602 Lisp_Object current_dir
;
1604 int pid
, inchannel
, outchannel
;
1606 #ifdef POSIX_SIGNALS
1609 struct sigaction sigint_action
;
1610 struct sigaction sigquit_action
;
1612 struct sigaction sighup_action
;
1614 #else /* !POSIX_SIGNALS */
1617 SIGTYPE (*sigchld
)();
1620 #endif /* !POSIX_SIGNALS */
1621 /* Use volatile to protect variables from being clobbered by longjmp. */
1622 volatile int forkin
, forkout
;
1623 volatile int pty_flag
= 0;
1625 extern char **environ
;
1628 inchannel
= outchannel
= -1;
1631 if (!NILP (Vprocess_connection_type
))
1632 outchannel
= inchannel
= allocate_pty ();
1636 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1637 /* On most USG systems it does not work to open the pty's tty here,
1638 then close it and reopen it in the child. */
1640 /* Don't let this terminal become our controlling terminal
1641 (in case we don't have one). */
1642 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1644 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1647 report_file_error ("Opening pty", Qnil
);
1649 forkin
= forkout
= -1;
1650 #endif /* not USG, or USG_SUBTTY_WORKS */
1654 #endif /* HAVE_PTYS */
1657 if (socketpair (AF_UNIX
, SOCK_STREAM
, 0, sv
) < 0)
1658 report_file_error ("Opening socketpair", Qnil
);
1659 outchannel
= inchannel
= sv
[0];
1660 forkout
= forkin
= sv
[1];
1662 #else /* not SKTPAIR */
1667 report_file_error ("Creating pipe", Qnil
);
1673 emacs_close (inchannel
);
1674 emacs_close (forkout
);
1675 report_file_error ("Creating pipe", Qnil
);
1680 #endif /* not SKTPAIR */
1683 /* Replaced by close_process_descs */
1684 set_exclusive_use (inchannel
);
1685 set_exclusive_use (outchannel
);
1688 /* Stride people say it's a mystery why this is needed
1689 as well as the O_NDELAY, but that it fails without this. */
1690 #if defined (STRIDE) || (defined (pfa) && defined (HAVE_PTYS))
1693 ioctl (inchannel
, FIONBIO
, &one
);
1698 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1699 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1702 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1703 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1707 /* Record this as an active process, with its channels.
1708 As a result, child_setup will close Emacs's side of the pipes. */
1709 chan_process
[inchannel
] = process
;
1710 XSETINT (XPROCESS (process
)->infd
, inchannel
);
1711 XSETINT (XPROCESS (process
)->outfd
, outchannel
);
1712 /* Record the tty descriptor used in the subprocess. */
1714 XPROCESS (process
)->subtty
= Qnil
;
1716 XSETFASTINT (XPROCESS (process
)->subtty
, forkin
);
1717 XPROCESS (process
)->pty_flag
= (pty_flag
? Qt
: Qnil
);
1718 XPROCESS (process
)->status
= Qrun
;
1719 if (!proc_decode_coding_system
[inchannel
])
1720 proc_decode_coding_system
[inchannel
]
1721 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
1722 setup_coding_system (XPROCESS (process
)->decode_coding_system
,
1723 proc_decode_coding_system
[inchannel
]);
1724 if (!proc_encode_coding_system
[outchannel
])
1725 proc_encode_coding_system
[outchannel
]
1726 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
1727 setup_coding_system (XPROCESS (process
)->encode_coding_system
,
1728 proc_encode_coding_system
[outchannel
]);
1730 /* Delay interrupts until we have a chance to store
1731 the new fork's pid in its process structure */
1732 #ifdef POSIX_SIGNALS
1733 sigemptyset (&blocked
);
1735 sigaddset (&blocked
, SIGCHLD
);
1737 #ifdef HAVE_WORKING_VFORK
1738 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1739 this sets the parent's signal handlers as well as the child's.
1740 So delay all interrupts whose handlers the child might munge,
1741 and record the current handlers so they can be restored later. */
1742 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1743 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1745 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1747 #endif /* HAVE_WORKING_VFORK */
1748 sigprocmask (SIG_BLOCK
, &blocked
, &procmask
);
1749 #else /* !POSIX_SIGNALS */
1753 #else /* not BSD4_1 */
1754 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1755 sigsetmask (sigmask (SIGCHLD
));
1756 #else /* ordinary USG */
1758 sigchld_deferred
= 0;
1759 sigchld
= signal (SIGCHLD
, create_process_sigchld
);
1761 #endif /* ordinary USG */
1762 #endif /* not BSD4_1 */
1763 #endif /* SIGCHLD */
1764 #endif /* !POSIX_SIGNALS */
1766 FD_SET (inchannel
, &input_wait_mask
);
1767 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1768 if (inchannel
> max_process_desc
)
1769 max_process_desc
= inchannel
;
1771 /* Until we store the proper pid, enable sigchld_handler
1772 to recognize an unknown pid as standing for this process.
1773 It is very important not to let this `marker' value stay
1774 in the table after this function has returned; if it does
1775 it might cause call-process to hang and subsequent asynchronous
1776 processes to get their return values scrambled. */
1777 XSETINT (XPROCESS (process
)->pid
, -1);
1782 /* child_setup must clobber environ on systems with true vfork.
1783 Protect it from permanent change. */
1784 char **save_environ
= environ
;
1786 current_dir
= ENCODE_FILE (current_dir
);
1791 #endif /* not WINDOWSNT */
1793 int xforkin
= forkin
;
1794 int xforkout
= forkout
;
1796 #if 0 /* This was probably a mistake--it duplicates code later on,
1797 but fails to handle all the cases. */
1798 /* Make sure SIGCHLD is not blocked in the child. */
1799 sigsetmask (SIGEMPTYMASK
);
1802 /* Make the pty be the controlling terminal of the process. */
1804 /* First, disconnect its current controlling terminal. */
1806 /* We tried doing setsid only if pty_flag, but it caused
1807 process_set_signal to fail on SGI when using a pipe. */
1809 /* Make the pty's terminal the controlling terminal. */
1813 /* We ignore the return value
1814 because faith@cs.unc.edu says that is necessary on Linux. */
1815 ioctl (xforkin
, TIOCSCTTY
, 0);
1818 #else /* not HAVE_SETSID */
1820 /* It's very important to call setpgrp here and no time
1821 afterwards. Otherwise, we lose our controlling tty which
1822 is set when we open the pty. */
1825 #endif /* not HAVE_SETSID */
1826 #if defined (HAVE_TERMIOS) && defined (LDISC1)
1827 if (pty_flag
&& xforkin
>= 0)
1830 tcgetattr (xforkin
, &t
);
1832 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1833 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1836 #if defined (NTTYDISC) && defined (TIOCSETD)
1837 if (pty_flag
&& xforkin
>= 0)
1839 /* Use new line discipline. */
1840 int ldisc
= NTTYDISC
;
1841 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1846 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1847 can do TIOCSPGRP only to the process's controlling tty. */
1850 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1851 I can't test it since I don't have 4.3. */
1852 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1853 ioctl (j
, TIOCNOTTY
, 0);
1856 /* In order to get a controlling terminal on some versions
1857 of BSD, it is necessary to put the process in pgrp 0
1858 before it opens the terminal. */
1866 #endif /* TIOCNOTTY */
1868 #if !defined (RTU) && !defined (UNIPLUS) && !defined (DONT_REOPEN_PTY)
1869 /*** There is a suggestion that this ought to be a
1870 conditional on TIOCSPGRP,
1871 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1872 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1873 that system does seem to need this code, even though
1874 both HAVE_SETSID and TIOCSCTTY are defined. */
1875 /* Now close the pty (if we had it open) and reopen it.
1876 This makes the pty the controlling terminal of the subprocess. */
1879 #ifdef SET_CHILD_PTY_PGRP
1880 int pgrp
= getpid ();
1883 /* I wonder if emacs_close (emacs_open (pty_name, ...))
1886 emacs_close (xforkin
);
1887 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
1891 emacs_write (1, "Couldn't open the pty terminal ", 31);
1892 emacs_write (1, pty_name
, strlen (pty_name
));
1893 emacs_write (1, "\n", 1);
1897 #ifdef SET_CHILD_PTY_PGRP
1898 ioctl (xforkin
, TIOCSPGRP
, &pgrp
);
1899 ioctl (xforkout
, TIOCSPGRP
, &pgrp
);
1902 #endif /* not UNIPLUS and not RTU and not DONT_REOPEN_PTY */
1904 #ifdef SETUP_SLAVE_PTY
1909 #endif /* SETUP_SLAVE_PTY */
1911 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1912 Now reenable it in the child, so it will die when we want it to. */
1914 signal (SIGHUP
, SIG_DFL
);
1916 #endif /* HAVE_PTYS */
1918 signal (SIGINT
, SIG_DFL
);
1919 signal (SIGQUIT
, SIG_DFL
);
1921 /* Stop blocking signals in the child. */
1922 #ifdef POSIX_SIGNALS
1923 sigprocmask (SIG_SETMASK
, &procmask
, 0);
1924 #else /* !POSIX_SIGNALS */
1928 #else /* not BSD4_1 */
1929 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
1930 sigsetmask (SIGEMPTYMASK
);
1931 #else /* ordinary USG */
1933 signal (SIGCHLD
, sigchld
);
1935 #endif /* ordinary USG */
1936 #endif /* not BSD4_1 */
1937 #endif /* SIGCHLD */
1938 #endif /* !POSIX_SIGNALS */
1941 child_setup_tty (xforkout
);
1943 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1944 new_argv
, 1, current_dir
);
1945 #else /* not WINDOWSNT */
1946 child_setup (xforkin
, xforkout
, xforkout
,
1947 new_argv
, 1, current_dir
);
1948 #endif /* not WINDOWSNT */
1950 environ
= save_environ
;
1955 /* This runs in the Emacs process. */
1959 emacs_close (forkin
);
1960 if (forkin
!= forkout
&& forkout
>= 0)
1961 emacs_close (forkout
);
1965 /* vfork succeeded. */
1966 XSETFASTINT (XPROCESS (process
)->pid
, pid
);
1969 register_child (pid
, inchannel
);
1970 #endif /* WINDOWSNT */
1972 /* If the subfork execv fails, and it exits,
1973 this close hangs. I don't know why.
1974 So have an interrupt jar it loose. */
1976 struct atimer
*timer
;
1980 EMACS_SET_SECS_USECS (offset
, 1, 0);
1981 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
1983 XPROCESS (process
)->subtty
= Qnil
;
1985 emacs_close (forkin
);
1987 cancel_atimer (timer
);
1991 if (forkin
!= forkout
&& forkout
>= 0)
1992 emacs_close (forkout
);
1996 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1999 XPROCESS (process
)->tty_name
= Qnil
;
2002 /* Restore the signal state whether vfork succeeded or not.
2003 (We will signal an error, below, if it failed.) */
2004 #ifdef POSIX_SIGNALS
2005 #ifdef HAVE_WORKING_VFORK
2006 /* Restore the parent's signal handlers. */
2007 sigaction (SIGINT
, &sigint_action
, 0);
2008 sigaction (SIGQUIT
, &sigquit_action
, 0);
2010 sigaction (SIGHUP
, &sighup_action
, 0);
2012 #endif /* HAVE_WORKING_VFORK */
2013 /* Stop blocking signals in the parent. */
2014 sigprocmask (SIG_SETMASK
, &procmask
, 0);
2015 #else /* !POSIX_SIGNALS */
2019 #else /* not BSD4_1 */
2020 #if defined (BSD_SYSTEM) || defined (UNIPLUS) || defined (HPUX)
2021 sigsetmask (SIGEMPTYMASK
);
2022 #else /* ordinary USG */
2024 signal (SIGCHLD
, sigchld
);
2025 /* Now really handle any of these signals
2026 that came in during this function. */
2027 if (sigchld_deferred
)
2028 kill (getpid (), SIGCHLD
);
2030 #endif /* ordinary USG */
2031 #endif /* not BSD4_1 */
2032 #endif /* SIGCHLD */
2033 #endif /* !POSIX_SIGNALS */
2035 /* Now generate the error if vfork failed. */
2037 report_file_error ("Doing vfork", Qnil
);
2039 #endif /* not VMS */
2044 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2045 The address family of sa is not included in the result. */
2048 conv_sockaddr_to_lisp (sa
, len
)
2049 struct sockaddr
*sa
;
2052 Lisp_Object address
;
2055 register struct Lisp_Vector
*p
;
2057 switch (sa
->sa_family
)
2061 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2062 len
= sizeof (sin
->sin_addr
) + 1;
2063 address
= Fmake_vector (make_number (len
), Qnil
);
2064 p
= XVECTOR (address
);
2065 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2066 cp
= (unsigned char *)&sin
->sin_addr
;
2069 #ifdef HAVE_LOCAL_SOCKETS
2072 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2073 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2074 if (sockun
->sun_path
[i
] == 0)
2076 return make_unibyte_string (sockun
->sun_path
, i
);
2080 len
-= sizeof (sa
->sa_family
);
2081 address
= Fcons (make_number (sa
->sa_family
),
2082 Fmake_vector (make_number (len
), Qnil
));
2083 p
= XVECTOR (XCDR (address
));
2084 cp
= (unsigned char *) sa
+ sizeof (sa
->sa_family
);
2090 p
->contents
[i
++] = make_number (*cp
++);
2096 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2099 get_lisp_to_sockaddr_size (address
, familyp
)
2100 Lisp_Object address
;
2103 register struct Lisp_Vector
*p
;
2105 if (VECTORP (address
))
2107 p
= XVECTOR (address
);
2111 return sizeof (struct sockaddr_in
);
2114 #ifdef HAVE_LOCAL_SOCKETS
2115 else if (STRINGP (address
))
2117 *familyp
= AF_LOCAL
;
2118 return sizeof (struct sockaddr_un
);
2121 else if (CONSP (address
) && INTEGERP (XCAR (address
)) && VECTORP (XCDR (address
)))
2123 struct sockaddr
*sa
;
2124 *familyp
= XINT (XCAR (address
));
2125 p
= XVECTOR (XCDR (address
));
2126 return p
->size
+ sizeof (sa
->sa_family
);
2131 /* Convert an address object (vector or string) to an internal sockaddr.
2132 Format of address has already been validated by size_lisp_to_sockaddr. */
2135 conv_lisp_to_sockaddr (family
, address
, sa
, len
)
2137 Lisp_Object address
;
2138 struct sockaddr
*sa
;
2141 register struct Lisp_Vector
*p
;
2142 register unsigned char *cp
;
2146 sa
->sa_family
= family
;
2148 if (VECTORP (address
))
2150 p
= XVECTOR (address
);
2151 if (family
== AF_INET
)
2153 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2154 len
= sizeof (sin
->sin_addr
) + 1;
2155 i
= XINT (p
->contents
[--len
]);
2156 sin
->sin_port
= htons (i
);
2157 cp
= (unsigned char *)&sin
->sin_addr
;
2160 else if (STRINGP (address
))
2162 #ifdef HAVE_LOCAL_SOCKETS
2163 if (family
== AF_LOCAL
)
2165 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2166 cp
= SDATA (address
);
2167 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2168 sockun
->sun_path
[i
] = *cp
++;
2175 p
= XVECTOR (XCDR (address
));
2176 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2179 for (i
= 0; i
< len
; i
++)
2180 if (INTEGERP (p
->contents
[i
]))
2181 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2184 #ifdef DATAGRAM_SOCKETS
2185 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2187 doc
: /* Get the current datagram address associated with PROCESS. */)
2189 Lisp_Object process
;
2193 CHECK_PROCESS (process
);
2195 if (!DATAGRAM_CONN_P (process
))
2198 channel
= XINT (XPROCESS (process
)->infd
);
2199 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2200 datagram_address
[channel
].len
);
2203 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2205 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2206 Returns nil upon error setting address, ADDRESS otherwise. */)
2208 Lisp_Object process
, address
;
2213 CHECK_PROCESS (process
);
2215 if (!DATAGRAM_CONN_P (process
))
2218 channel
= XINT (XPROCESS (process
)->infd
);
2220 len
= get_lisp_to_sockaddr_size (address
, &family
);
2221 if (datagram_address
[channel
].len
!= len
)
2223 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2229 static struct socket_options
{
2230 /* The name of this option. Should be lowercase version of option
2231 name without SO_ prefix. */
2233 /* Length of name. */
2235 /* Option level SOL_... */
2237 /* Option number SO_... */
2239 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_STR
, SOPT_LINGER
} opttype
;
2240 } socket_options
[] =
2242 #ifdef SO_BINDTODEVICE
2243 { "bindtodevice", 12, SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_STR
},
2246 { "broadcast", 9, SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
},
2249 { "dontroute", 9, SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
},
2252 { "keepalive", 9, SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
},
2255 { "linger", 6, SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
},
2258 { "oobinline", 9, SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
},
2261 { "priority", 8, SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
},
2264 { "reuseaddr", 9, SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
},
2266 { 0, 0, 0, 0, SOPT_UNKNOWN
}
2269 /* Process list of socket options OPTS on socket S.
2270 Only check if options are supported is S < 0.
2271 If NO_ERROR is non-zero, continue silently if an option
2274 Each element specifies one option. An element is either a string
2275 "OPTION=VALUE" or a cons (OPTION . VALUE) where OPTION is a string
2279 set_socket_options (s
, opts
, no_error
)
2285 opts
= Fcons (opts
, Qnil
);
2287 while (CONSP (opts
))
2292 struct socket_options
*sopt
;
2306 name
= (char *) SDATA (opt
);
2307 else if (SYMBOLP (opt
))
2308 name
= (char *) SDATA (SYMBOL_NAME (opt
));
2310 error ("Mal-formed option list");
2314 if (strncmp (name
, "no", 2) == 0)
2321 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2322 if (strncmp (name
, sopt
->name
, sopt
->nlen
) == 0)
2324 if (name
[sopt
->nlen
] == 0)
2326 if (name
[sopt
->nlen
] == '=')
2328 arg
= name
+ sopt
->nlen
+ 1;
2333 switch (sopt
->opttype
)
2341 optval
= (*arg
== '0' || *arg
== 'n') ? 0 : 1;
2342 else if (INTEGERP (val
))
2343 optval
= XINT (val
) == 0 ? 0 : 1;
2345 optval
= NILP (val
) ? 0 : 1;
2346 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2347 &optval
, sizeof (optval
));
2356 else if (INTEGERP (val
))
2357 optval
= XINT (val
);
2359 error ("Bad option argument for %s", name
);
2362 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2363 &optval
, sizeof (optval
));
2373 else if (STRINGP (val
))
2374 arg
= (char *) SDATA (val
);
2375 else if (XSYMBOL (val
))
2376 arg
= (char *) SDATA (SYMBOL_NAME (val
));
2378 error ("Invalid argument to %s option", name
);
2380 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2387 struct linger linger
;
2390 linger
.l_linger
= 0;
2397 if (*arg
== 'n' || *arg
== 't' || *arg
== 'y')
2398 linger
.l_onoff
= (*arg
== 'n') ? 0 : 1;
2400 linger
.l_linger
= atoi(arg
);
2402 else if (INTEGERP (val
))
2403 linger
.l_linger
= XINT (val
);
2405 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2406 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2407 &linger
, sizeof (linger
));
2416 error ("Unsupported option: %s", name
);
2418 if (ret
< 0 && ! no_error
)
2419 report_file_error ("Cannot set network option: %s", opt
);
2424 DEFUN ("set-network-process-options",
2425 Fset_network_process_options
, Sset_network_process_options
,
2427 doc
: /* Set one or more options for network process PROCESS.
2428 Each option is either a string "OPT=VALUE" or a cons (OPT . VALUE).
2429 A boolean value is false if it either zero or nil, true otherwise.
2431 The following options are known. Consult the relevant system manual
2432 pages for more information.
2434 bindtodevice=NAME -- bind to interface NAME, or remove binding if nil.
2435 broadcast=BOOL -- Allow send and receive of datagram broadcasts.
2436 dontroute=BOOL -- Only send to directly connected hosts.
2437 keepalive=BOOL -- Send keep-alive messages on network stream.
2438 linger=BOOL or TIMEOUT -- Send queued messages before closing.
2439 oobinline=BOOL -- Place out-of-band data in receive data stream.
2440 priority=INT -- Set protocol defined priority for sent packets.
2441 reuseaddr=BOOL -- Allow reusing a recently used address.
2443 usage: (set-network-process-options PROCESS &rest OPTIONS) */)
2448 Lisp_Object process
;
2452 CHECK_PROCESS (process
);
2453 if (nargs
> 1 && XINT (XPROCESS (process
)->infd
) >= 0)
2455 opts
= Flist (nargs
, args
);
2456 set_socket_options (XINT (XPROCESS (process
)->infd
), opts
, 0);
2461 /* A version of request_sigio suitable for a record_unwind_protect. */
2464 unwind_request_sigio (dummy
)
2467 if (interrupt_input
)
2472 /* Create a network stream/datagram client/server process. Treated
2473 exactly like a normal process when reading and writing. Primary
2474 differences are in status display and process deletion. A network
2475 connection has no PID; you cannot signal it. All you can do is
2476 stop/continue it and deactivate/close it via delete-process */
2478 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2480 doc
: /* Create and return a network server or client process.
2482 In Emacs, network connections are represented by process objects, so
2483 input and output work as for subprocesses and `delete-process' closes
2484 a network connection. However, a network process has no process id,
2485 it cannot be signalled, and the status codes are different from normal
2488 Arguments are specified as keyword/argument pairs. The following
2489 arguments are defined:
2491 :name NAME -- NAME is name for process. It is modified if necessary
2494 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2495 with the process. Process output goes at end of that buffer, unless
2496 you specify an output stream or filter function to handle the output.
2497 BUFFER may be also nil, meaning that this process is not associated
2500 :host HOST -- HOST is name of the host to connect to, or its IP
2501 address. The symbol `local' specifies the local host. If specified
2502 for a server process, it must be a valid name or address for the local
2503 host, and only clients connecting to that address will be accepted.
2505 :service SERVICE -- SERVICE is name of the service desired, or an
2506 integer specifying a port number to connect to. If SERVICE is t,
2507 a random port number is selected for the server.
2509 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2510 stream type connection, `datagram' creates a datagram type connection.
2512 :family FAMILY -- FAMILY is the address (and protocol) family for the
2513 service specified by HOST and SERVICE. The default address family is
2514 Inet (or IPv4) for the host and port number specified by HOST and
2515 SERVICE. Other address families supported are:
2516 local -- for a local (i.e. UNIX) address specified by SERVICE.
2518 :local ADDRESS -- ADDRESS is the local address used for the connection.
2519 This parameter is ignored when opening a client process. When specified
2520 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2522 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2523 connection. This parameter is ignored when opening a stream server
2524 process. For a datagram server process, it specifies the initial
2525 setting of the remote datagram address. When specified for a client
2526 process, the FAMILY, HOST, and SERVICE args are ignored.
2528 The format of ADDRESS depends on the address family:
2529 - An IPv4 address is represented as an vector of integers [A B C D P]
2530 corresponding to numeric IP address A.B.C.D and port number P.
2531 - A local address is represented as a string with the address in the
2532 local address space.
2533 - An "unsupported family" address is represented by a cons (F . AV)
2534 where F is the family number and AV is a vector containing the socket
2535 address data with one element per address data byte. Do not rely on
2536 this format in portable code, as it may depend on implementation
2537 defined constants, data sizes, and data structure alignment.
2539 :coding CODING -- CODING is coding system for this process.
2541 :options OPTIONS -- Set the specified options for the network process.
2542 See `set-network-process-options' for details.
2544 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2545 return without waiting for the connection to complete; instead, the
2546 sentinel function will be called with second arg matching "open" (if
2547 successful) or "failed" when the connect completes. Default is to use
2548 a blocking connect (i.e. wait) for stream type connections.
2550 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2551 running when emacs is exited.
2553 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2554 In the stopped state, a server process does not accept new
2555 connections, and a client process does not handle incoming traffic.
2556 The stopped state is cleared by `continue-process' and set by
2559 :filter FILTER -- Install FILTER as the process filter.
2561 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2563 :log LOG -- Install LOG as the server process log function. This
2564 function is called when the server accepts a network connection from a
2565 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2566 is the server process, CLIENT is the new process for the connection,
2567 and MESSAGE is a string.
2569 :server BOOL -- if BOOL is non-nil, create a server process for the
2570 specified FAMILY, SERVICE, and connection type (stream or datagram).
2571 Default is a client process.
2573 A server process will listen for and accept connections from
2574 clients. When a client connection is accepted, a new network process
2575 is created for the connection with the following parameters:
2576 - The client's process name is constructed by concatenating the server
2577 process' NAME and a client identification string.
2578 - If the FILTER argument is non-nil, the client process will not get a
2579 separate process buffer; otherwise, the client's process buffer is a newly
2580 created buffer named after the server process' BUFFER name or process
2581 NAME concatenated with the client identification string.
2582 - The connection type and the process filter and sentinel parameters are
2583 inherited from the server process' TYPE, FILTER and SENTINEL.
2584 - The client process' contact info is set according to the client's
2585 addressing information (typically an IP address and a port number).
2587 Notice that the FILTER and SENTINEL args are never used directly by
2588 the server process. Also, the BUFFER argument is not used directly by
2589 the server process, but via the optional :log function, accepted (and
2590 failed) connections may be logged in the server process' buffer.
2592 usage: (make-network-process &rest ARGS) */)
2598 Lisp_Object contact
;
2599 struct Lisp_Process
*p
;
2600 #ifdef HAVE_GETADDRINFO
2601 struct addrinfo ai
, *res
, *lres
;
2602 struct addrinfo hints
;
2603 char *portstring
, portbuf
[128];
2604 #else /* HAVE_GETADDRINFO */
2605 struct _emacs_addrinfo
2611 struct sockaddr
*ai_addr
;
2612 struct _emacs_addrinfo
*ai_next
;
2614 #endif /* HAVE_GETADDRINFO */
2615 struct sockaddr_in address_in
;
2616 #ifdef HAVE_LOCAL_SOCKETS
2617 struct sockaddr_un address_un
;
2622 int s
= -1, outch
, inch
;
2623 struct gcpro gcpro1
;
2625 int count
= SPECPDL_INDEX ();
2627 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2629 Lisp_Object name
, buffer
, host
, service
, address
;
2630 Lisp_Object filter
, sentinel
;
2631 int is_non_blocking_client
= 0;
2639 /* Save arguments for process-contact and clone-process. */
2640 contact
= Flist (nargs
, args
);
2644 /* Ensure socket support is loaded if available. */
2645 init_winsock (TRUE
);
2648 /* :type TYPE (nil: stream, datagram */
2649 tem
= Fplist_get (contact
, QCtype
);
2651 socktype
= SOCK_STREAM
;
2652 #ifdef DATAGRAM_SOCKETS
2653 else if (EQ (tem
, Qdatagram
))
2654 socktype
= SOCK_DGRAM
;
2657 error ("Unsupported connection type");
2660 tem
= Fplist_get (contact
, QCserver
);
2663 /* Don't support network sockets when non-blocking mode is
2664 not available, since a blocked Emacs is not useful. */
2665 #if defined(TERM) || (!defined(O_NONBLOCK) && !defined(O_NDELAY))
2666 error ("Network servers not supported");
2672 /* Make QCaddress an alias for :local (server) or :remote (client). */
2673 QCaddress
= is_server
? QClocal
: QCremote
;
2676 if (!is_server
&& socktype
== SOCK_STREAM
2677 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2679 #ifndef NON_BLOCKING_CONNECT
2680 error ("Non-blocking connect not supported");
2682 is_non_blocking_client
= 1;
2686 name
= Fplist_get (contact
, QCname
);
2687 buffer
= Fplist_get (contact
, QCbuffer
);
2688 filter
= Fplist_get (contact
, QCfilter
);
2689 sentinel
= Fplist_get (contact
, QCsentinel
);
2691 CHECK_STRING (name
);
2694 /* Let's handle TERM before things get complicated ... */
2695 host
= Fplist_get (contact
, QChost
);
2696 CHECK_STRING (host
);
2698 service
= Fplist_get (contact
, QCservice
);
2699 if (INTEGERP (service
))
2700 port
= htons ((unsigned short) XINT (service
));
2703 struct servent
*svc_info
;
2704 CHECK_STRING (service
);
2705 svc_info
= getservbyname (SDATA (service
), "tcp");
2707 error ("Unknown service: %s", SDATA (service
));
2708 port
= svc_info
->s_port
;
2711 s
= connect_server (0);
2713 report_file_error ("error creating socket", Fcons (name
, Qnil
));
2714 send_command (s
, C_PORT
, 0, "%s:%d", SDATA (host
), ntohs (port
));
2715 send_command (s
, C_DUMB
, 1, 0);
2717 #else /* not TERM */
2719 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2720 ai
.ai_socktype
= socktype
;
2725 /* :local ADDRESS or :remote ADDRESS */
2726 address
= Fplist_get (contact
, QCaddress
);
2727 if (!NILP (address
))
2729 host
= service
= Qnil
;
2731 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
2732 error ("Malformed :address");
2733 ai
.ai_family
= family
;
2734 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
2735 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
2739 /* :family FAMILY -- nil (for Inet), local, or integer. */
2740 tem
= Fplist_get (contact
, QCfamily
);
2742 family
= XINT (tem
);
2747 #ifdef HAVE_LOCAL_SOCKETS
2748 else if (EQ (tem
, Qlocal
))
2753 error ("Unknown address family");
2754 ai
.ai_family
= family
;
2756 /* :service SERVICE -- string, integer (port number), or t (random port). */
2757 service
= Fplist_get (contact
, QCservice
);
2759 #ifdef HAVE_LOCAL_SOCKETS
2760 if (family
== AF_LOCAL
)
2762 /* Host is not used. */
2764 CHECK_STRING (service
);
2765 bzero (&address_un
, sizeof address_un
);
2766 address_un
.sun_family
= AF_LOCAL
;
2767 strncpy (address_un
.sun_path
, SDATA (service
), sizeof address_un
.sun_path
);
2768 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
2769 ai
.ai_addrlen
= sizeof address_un
;
2774 /* :host HOST -- hostname, ip address, or 'local for localhost. */
2775 host
= Fplist_get (contact
, QChost
);
2778 if (EQ (host
, Qlocal
))
2779 host
= build_string ("localhost");
2780 CHECK_STRING (host
);
2783 /* Slow down polling to every ten seconds.
2784 Some kernels have a bug which causes retrying connect to fail
2785 after a connect. Polling can interfere with gethostbyname too. */
2786 #ifdef POLL_FOR_INPUT
2787 if (socktype
== SOCK_STREAM
)
2789 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
2790 bind_polling_period (10);
2794 #ifdef HAVE_GETADDRINFO
2795 /* If we have a host, use getaddrinfo to resolve both host and service.
2796 Otherwise, use getservbyname to lookup the service. */
2800 /* SERVICE can either be a string or int.
2801 Convert to a C string for later use by getaddrinfo. */
2802 if (EQ (service
, Qt
))
2804 else if (INTEGERP (service
))
2806 sprintf (portbuf
, "%ld", (long) XINT (service
));
2807 portstring
= portbuf
;
2811 CHECK_STRING (service
);
2812 portstring
= SDATA (service
);
2817 memset (&hints
, 0, sizeof (hints
));
2819 hints
.ai_family
= NILP (Fplist_member (contact
, QCfamily
)) ? AF_UNSPEC
: family
;
2820 hints
.ai_socktype
= socktype
;
2821 hints
.ai_protocol
= 0;
2822 ret
= getaddrinfo (SDATA (host
), portstring
, &hints
, &res
);
2824 #ifdef HAVE_GAI_STRERROR
2825 error ("%s/%s %s", SDATA (host
), portstring
, gai_strerror(ret
));
2827 error ("%s/%s getaddrinfo error %d", SDATA (host
), portstring
, ret
);
2833 #endif /* HAVE_GETADDRINFO */
2835 /* We end up here if getaddrinfo is not defined, or in case no hostname
2836 has been specified (e.g. for a local server process). */
2838 if (EQ (service
, Qt
))
2840 else if (INTEGERP (service
))
2841 port
= htons ((unsigned short) XINT (service
));
2844 struct servent
*svc_info
;
2845 CHECK_STRING (service
);
2846 svc_info
= getservbyname (SDATA (service
),
2847 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
2849 error ("Unknown service: %s", SDATA (service
));
2850 port
= svc_info
->s_port
;
2853 bzero (&address_in
, sizeof address_in
);
2854 address_in
.sin_family
= family
;
2855 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
2856 address_in
.sin_port
= port
;
2858 #ifndef HAVE_GETADDRINFO
2861 struct hostent
*host_info_ptr
;
2863 /* gethostbyname may fail with TRY_AGAIN, but we don't honour that,
2864 as it may `hang' emacs for a very long time. */
2867 host_info_ptr
= gethostbyname (SDATA (host
));
2872 bcopy (host_info_ptr
->h_addr
, (char *) &address_in
.sin_addr
,
2873 host_info_ptr
->h_length
);
2874 family
= host_info_ptr
->h_addrtype
;
2875 address_in
.sin_family
= family
;
2878 /* Attempt to interpret host as numeric inet address */
2880 IN_ADDR numeric_addr
;
2881 numeric_addr
= inet_addr ((char *) SDATA (host
));
2882 if (NUMERIC_ADDR_ERROR
)
2883 error ("Unknown host \"%s\"", SDATA (host
));
2885 bcopy ((char *)&numeric_addr
, (char *) &address_in
.sin_addr
,
2886 sizeof (address_in
.sin_addr
));
2890 #endif /* not HAVE_GETADDRINFO */
2892 ai
.ai_family
= family
;
2893 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
2894 ai
.ai_addrlen
= sizeof address_in
;
2898 /* Kernel bugs (on Ultrix at least) cause lossage (not just EINTR)
2899 when connect is interrupted. So let's not let it get interrupted.
2900 Note we do not turn off polling, because polling is only used
2901 when not interrupt_input, and thus not normally used on the systems
2902 which have this bug. On systems which use polling, there's no way
2903 to quit if polling is turned off. */
2905 && !is_server
&& socktype
== SOCK_STREAM
)
2907 /* Comment from KFS: The original open-network-stream code
2908 didn't unwind protect this, but it seems like the proper
2909 thing to do. In any case, I don't see how it could harm to
2910 do this -- and it makes cleanup (using unbind_to) easier. */
2911 record_unwind_protect (unwind_request_sigio
, Qnil
);
2915 /* Do this in case we never enter the for-loop below. */
2916 count1
= SPECPDL_INDEX ();
2919 for (lres
= res
; lres
; lres
= lres
->ai_next
)
2921 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
2928 #ifdef DATAGRAM_SOCKETS
2929 if (!is_server
&& socktype
== SOCK_DGRAM
)
2931 #endif /* DATAGRAM_SOCKETS */
2933 #ifdef NON_BLOCKING_CONNECT
2934 if (is_non_blocking_client
)
2937 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
2939 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
2951 /* Make us close S if quit. */
2952 record_unwind_protect (close_file_unwind
, make_number (s
));
2956 /* Configure as a server socket. */
2957 #ifdef HAVE_LOCAL_SOCKETS
2958 if (family
!= AF_LOCAL
)
2962 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
2963 report_file_error ("Cannot set reuse option on server socket.", Qnil
);
2966 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
2967 report_file_error ("Cannot bind server socket", Qnil
);
2969 #ifdef HAVE_GETSOCKNAME
2970 if (EQ (service
, Qt
))
2972 struct sockaddr_in sa1
;
2973 int len1
= sizeof (sa1
);
2974 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
2976 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
2977 service
= make_number (ntohs (sa1
.sin_port
));
2978 contact
= Fplist_put (contact
, QCservice
, service
);
2983 if (socktype
== SOCK_STREAM
&& listen (s
, 5))
2984 report_file_error ("Cannot listen on server socket", Qnil
);
2994 /* This turns off all alarm-based interrupts; the
2995 bind_polling_period call above doesn't always turn all the
2996 short-interval ones off, especially if interrupt_input is
2999 It'd be nice to be able to control the connect timeout
3000 though. Would non-blocking connect calls be portable?
3002 This used to be conditioned by HAVE_GETADDRINFO. Why? */
3004 turn_on_atimers (0);
3006 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3009 turn_on_atimers (1);
3011 if (ret
== 0 || xerrno
== EISCONN
)
3013 /* The unwind-protect will be discarded afterwards.
3014 Likewise for immediate_quit. */
3018 #ifdef NON_BLOCKING_CONNECT
3020 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3024 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3032 if (xerrno
== EINTR
)
3034 if (xerrno
== EADDRINUSE
&& retry
< 20)
3036 /* A delay here is needed on some FreeBSD systems,
3037 and it is harmless, since this retrying takes time anyway
3038 and should be infrequent. */
3039 Fsleep_for (make_number (1), Qnil
);
3044 /* Discard the unwind protect closing S. */
3045 specpdl_ptr
= specpdl
+ count1
;
3052 #ifdef DATAGRAM_SOCKETS
3053 if (socktype
== SOCK_DGRAM
)
3055 if (datagram_address
[s
].sa
)
3057 datagram_address
[s
].sa
= (struct sockaddr
*) xmalloc (lres
->ai_addrlen
);
3058 datagram_address
[s
].len
= lres
->ai_addrlen
;
3062 bzero (datagram_address
[s
].sa
, lres
->ai_addrlen
);
3063 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3066 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3067 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3068 conv_lisp_to_sockaddr (rfamily
, remote
,
3069 datagram_address
[s
].sa
, rlen
);
3073 bcopy (lres
->ai_addr
, datagram_address
[s
].sa
, lres
->ai_addrlen
);
3076 contact
= Fplist_put (contact
, QCaddress
,
3077 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3078 #ifdef HAVE_GETSOCKNAME
3081 struct sockaddr_in sa1
;
3082 int len1
= sizeof (sa1
);
3083 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3084 contact
= Fplist_put (contact
, QClocal
,
3085 conv_sockaddr_to_lisp (&sa1
, len1
));
3090 #ifdef HAVE_GETADDRINFO
3097 /* Discard the unwind protect for closing S, if any. */
3098 specpdl_ptr
= specpdl
+ count1
;
3100 /* Unwind bind_polling_period and request_sigio. */
3101 unbind_to (count
, Qnil
);
3105 /* If non-blocking got this far - and failed - assume non-blocking is
3106 not supported after all. This is probably a wrong assumption, but
3107 the normal blocking calls to open-network-stream handles this error
3109 if (is_non_blocking_client
)
3114 report_file_error ("make server process failed", contact
);
3116 report_file_error ("make client process failed", contact
);
3119 tem
= Fplist_get (contact
, QCoptions
);
3121 set_socket_options (s
, tem
, 1);
3123 #endif /* not TERM */
3129 buffer
= Fget_buffer_create (buffer
);
3130 proc
= make_process (name
);
3132 chan_process
[inch
] = proc
;
3135 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3138 fcntl (inch
, F_SETFL
, O_NDELAY
);
3142 p
= XPROCESS (proc
);
3144 p
->childp
= contact
;
3146 p
->sentinel
= sentinel
;
3148 p
->log
= Fplist_get (contact
, QClog
);
3149 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3150 p
->kill_without_query
= Qt
;
3151 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3154 XSETINT (p
->infd
, inch
);
3155 XSETINT (p
->outfd
, outch
);
3156 if (is_server
&& socktype
== SOCK_STREAM
)
3157 p
->status
= Qlisten
;
3159 #ifdef NON_BLOCKING_CONNECT
3160 if (is_non_blocking_client
)
3162 /* We may get here if connect did succeed immediately. However,
3163 in that case, we still need to signal this like a non-blocking
3165 p
->status
= Qconnect
;
3166 if (!FD_ISSET (inch
, &connect_wait_mask
))
3168 FD_SET (inch
, &connect_wait_mask
);
3169 num_pending_connects
++;
3174 /* A server may have a client filter setting of Qt, but it must
3175 still listen for incoming connects unless it is stopped. */
3176 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3177 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3179 FD_SET (inch
, &input_wait_mask
);
3180 FD_SET (inch
, &non_keyboard_wait_mask
);
3183 if (inch
> max_process_desc
)
3184 max_process_desc
= inch
;
3186 tem
= Fplist_member (contact
, QCcoding
);
3187 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3188 tem
= Qnil
; /* No error message (too late!). */
3191 /* Setup coding systems for communicating with the network stream. */
3192 struct gcpro gcpro1
;
3193 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3194 Lisp_Object coding_systems
= Qt
;
3195 Lisp_Object args
[5], val
;
3198 val
= XCAR (XCDR (tem
));
3199 else if (!NILP (Vcoding_system_for_read
))
3200 val
= Vcoding_system_for_read
;
3201 else if ((!NILP (buffer
) && NILP (XBUFFER (buffer
)->enable_multibyte_characters
))
3202 || (NILP (buffer
) && NILP (buffer_defaults
.enable_multibyte_characters
)))
3203 /* We dare not decode end-of-line format by setting VAL to
3204 Qraw_text, because the existing Emacs Lisp libraries
3205 assume that they receive bare code including a sequene of
3210 if (NILP (host
) || NILP (service
))
3211 coding_systems
= Qnil
;
3214 args
[0] = Qopen_network_stream
, args
[1] = name
,
3215 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3217 coding_systems
= Ffind_operation_coding_system (5, args
);
3220 if (CONSP (coding_systems
))
3221 val
= XCAR (coding_systems
);
3222 else if (CONSP (Vdefault_process_coding_system
))
3223 val
= XCAR (Vdefault_process_coding_system
);
3227 p
->decode_coding_system
= val
;
3230 val
= XCAR (XCDR (tem
));
3231 else if (!NILP (Vcoding_system_for_write
))
3232 val
= Vcoding_system_for_write
;
3233 else if (NILP (current_buffer
->enable_multibyte_characters
))
3237 if (EQ (coding_systems
, Qt
))
3239 if (NILP (host
) || NILP (service
))
3240 coding_systems
= Qnil
;
3243 args
[0] = Qopen_network_stream
, args
[1] = name
,
3244 args
[2] = buffer
, args
[3] = host
, args
[4] = service
;
3246 coding_systems
= Ffind_operation_coding_system (5, args
);
3250 if (CONSP (coding_systems
))
3251 val
= XCDR (coding_systems
);
3252 else if (CONSP (Vdefault_process_coding_system
))
3253 val
= XCDR (Vdefault_process_coding_system
);
3257 p
->encode_coding_system
= val
;
3260 if (!proc_decode_coding_system
[inch
])
3261 proc_decode_coding_system
[inch
]
3262 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
3263 setup_coding_system (p
->decode_coding_system
,
3264 proc_decode_coding_system
[inch
]);
3265 if (!proc_encode_coding_system
[outch
])
3266 proc_encode_coding_system
[outch
]
3267 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
3268 setup_coding_system (p
->encode_coding_system
,
3269 proc_encode_coding_system
[outch
]);
3271 p
->decoding_buf
= make_uninit_string (0);
3272 p
->decoding_carryover
= make_number (0);
3273 p
->encoding_buf
= make_uninit_string (0);
3274 p
->encoding_carryover
= make_number (0);
3276 p
->inherit_coding_system_flag
3277 = (!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
3283 #endif /* HAVE_SOCKETS */
3286 deactivate_process (proc
)
3289 register int inchannel
, outchannel
;
3290 register struct Lisp_Process
*p
= XPROCESS (proc
);
3292 inchannel
= XINT (p
->infd
);
3293 outchannel
= XINT (p
->outfd
);
3297 /* Beware SIGCHLD hereabouts. */
3298 flush_pending_output (inchannel
);
3301 VMS_PROC_STUFF
*get_vms_process_pointer (), *vs
;
3302 sys$
dassgn (outchannel
);
3303 vs
= get_vms_process_pointer (p
->pid
);
3305 give_back_vms_process_stuff (vs
);
3308 emacs_close (inchannel
);
3309 if (outchannel
>= 0 && outchannel
!= inchannel
)
3310 emacs_close (outchannel
);
3313 XSETINT (p
->infd
, -1);
3314 XSETINT (p
->outfd
, -1);
3315 #ifdef DATAGRAM_SOCKETS
3316 if (DATAGRAM_CHAN_P (inchannel
))
3318 xfree (datagram_address
[inchannel
].sa
);
3319 datagram_address
[inchannel
].sa
= 0;
3320 datagram_address
[inchannel
].len
= 0;
3323 chan_process
[inchannel
] = Qnil
;
3324 FD_CLR (inchannel
, &input_wait_mask
);
3325 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3326 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3328 FD_CLR (inchannel
, &connect_wait_mask
);
3329 if (--num_pending_connects
< 0)
3332 if (inchannel
== max_process_desc
)
3335 /* We just closed the highest-numbered process input descriptor,
3336 so recompute the highest-numbered one now. */
3337 max_process_desc
= 0;
3338 for (i
= 0; i
< MAXDESC
; i
++)
3339 if (!NILP (chan_process
[i
]))
3340 max_process_desc
= i
;
3345 /* Close all descriptors currently in use for communication
3346 with subprocess. This is used in a newly-forked subprocess
3347 to get rid of irrelevant descriptors. */
3350 close_process_descs ()
3354 for (i
= 0; i
< MAXDESC
; i
++)
3356 Lisp_Object process
;
3357 process
= chan_process
[i
];
3358 if (!NILP (process
))
3360 int in
= XINT (XPROCESS (process
)->infd
);
3361 int out
= XINT (XPROCESS (process
)->outfd
);
3364 if (out
>= 0 && in
!= out
)
3371 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3373 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3374 It is read into the process' buffers or given to their filter functions.
3375 Non-nil arg PROCESS means do not return until some output has been received
3377 Non-nil second arg TIMEOUT and third arg TIMEOUT-MSECS are number of
3378 seconds and microseconds to wait; return after that much time whether
3379 or not there is input.
3380 Return non-nil iff we received any output before the timeout expired. */)
3381 (process
, timeout
, timeout_msecs
)
3382 register Lisp_Object process
, timeout
, timeout_msecs
;
3387 if (! NILP (process
))
3388 CHECK_PROCESS (process
);
3390 if (! NILP (timeout_msecs
))
3392 CHECK_NUMBER (timeout_msecs
);
3393 useconds
= XINT (timeout_msecs
);
3394 if (!INTEGERP (timeout
))
3395 XSETINT (timeout
, 0);
3398 int carry
= useconds
/ 1000000;
3400 XSETINT (timeout
, XINT (timeout
) + carry
);
3401 useconds
-= carry
* 1000000;
3403 /* I think this clause is necessary because C doesn't
3404 guarantee a particular rounding direction for negative
3408 XSETINT (timeout
, XINT (timeout
) - 1);
3409 useconds
+= 1000000;
3416 if (! NILP (timeout
))
3418 CHECK_NUMBER (timeout
);
3419 seconds
= XINT (timeout
);
3420 if (seconds
< 0 || (seconds
== 0 && useconds
== 0))
3432 XSETFASTINT (process
, 0);
3435 (wait_reading_process_input (seconds
, useconds
, process
, 0)
3439 /* Accept a connection for server process SERVER on CHANNEL. */
3441 static int connect_counter
= 0;
3444 server_accept_connection (server
, channel
)
3448 Lisp_Object proc
, caller
, name
, buffer
;
3449 Lisp_Object contact
, host
, service
;
3450 struct Lisp_Process
*ps
= XPROCESS (server
);
3451 struct Lisp_Process
*p
;
3455 struct sockaddr_in in
;
3456 #ifdef HAVE_LOCAL_SOCKETS
3457 struct sockaddr_un un
;
3460 int len
= sizeof saddr
;
3462 s
= accept (channel
, &saddr
.sa
, &len
);
3471 if (code
== EWOULDBLOCK
)
3475 if (!NILP (ps
->log
))
3476 call3 (ps
->log
, server
, Qnil
,
3477 concat3 (build_string ("accept failed with code"),
3478 Fnumber_to_string (make_number (code
)),
3479 build_string ("\n")));
3485 /* Setup a new process to handle the connection. */
3487 /* Generate a unique identification of the caller, and build contact
3488 information for this process. */
3491 switch (saddr
.sa
.sa_family
)
3495 Lisp_Object args
[5];
3496 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
3497 args
[0] = build_string ("%d.%d.%d.%d");
3498 args
[1] = make_number (*ip
++);
3499 args
[2] = make_number (*ip
++);
3500 args
[3] = make_number (*ip
++);
3501 args
[4] = make_number (*ip
++);
3502 host
= Fformat (5, args
);
3503 service
= make_number (ntohs (saddr
.in
.sin_port
));
3505 args
[0] = build_string (" <%s:%d>");
3508 caller
= Fformat (3, args
);
3512 #ifdef HAVE_LOCAL_SOCKETS
3516 caller
= Fnumber_to_string (make_number (connect_counter
));
3517 caller
= concat3 (build_string (" <*"), caller
, build_string ("*>"));
3521 /* Create a new buffer name for this process if it doesn't have a
3522 filter. The new buffer name is based on the buffer name or
3523 process name of the server process concatenated with the caller
3526 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
3530 buffer
= ps
->buffer
;
3532 buffer
= Fbuffer_name (buffer
);
3537 buffer
= concat2 (buffer
, caller
);
3538 buffer
= Fget_buffer_create (buffer
);
3542 /* Generate a unique name for the new server process. Combine the
3543 server process name with the caller identification. */
3545 name
= concat2 (ps
->name
, caller
);
3546 proc
= make_process (name
);
3548 chan_process
[s
] = proc
;
3551 fcntl (s
, F_SETFL
, O_NONBLOCK
);
3554 fcntl (s
, F_SETFL
, O_NDELAY
);
3558 p
= XPROCESS (proc
);
3560 /* Build new contact information for this setup. */
3561 contact
= Fcopy_sequence (ps
->childp
);
3562 contact
= Fplist_put (contact
, QCserver
, Qnil
);
3563 contact
= Fplist_put (contact
, QChost
, host
);
3564 if (!NILP (service
))
3565 contact
= Fplist_put (contact
, QCservice
, service
);
3566 contact
= Fplist_put (contact
, QCremote
,
3567 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
3568 #ifdef HAVE_GETSOCKNAME
3570 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
3571 contact
= Fplist_put (contact
, QClocal
,
3572 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
3575 p
->childp
= contact
;
3577 p
->sentinel
= ps
->sentinel
;
3578 p
->filter
= ps
->filter
;
3581 XSETINT (p
->infd
, s
);
3582 XSETINT (p
->outfd
, s
);
3585 /* Client processes for accepted connections are not stopped initially. */
3586 if (!EQ (p
->filter
, Qt
))
3588 FD_SET (s
, &input_wait_mask
);
3589 FD_SET (s
, &non_keyboard_wait_mask
);
3592 if (s
> max_process_desc
)
3593 max_process_desc
= s
;
3595 /* Setup coding system for new process based on server process.
3596 This seems to be the proper thing to do, as the coding system
3597 of the new process should reflect the settings at the time the
3598 server socket was opened; not the current settings. */
3600 p
->decode_coding_system
= ps
->decode_coding_system
;
3601 p
->encode_coding_system
= ps
->encode_coding_system
;
3603 if (!proc_decode_coding_system
[s
])
3604 proc_decode_coding_system
[s
]
3605 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
3606 setup_coding_system (p
->decode_coding_system
,
3607 proc_decode_coding_system
[s
]);
3608 if (!proc_encode_coding_system
[s
])
3609 proc_encode_coding_system
[s
]
3610 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
3611 setup_coding_system (p
->encode_coding_system
,
3612 proc_encode_coding_system
[s
]);
3614 p
->decoding_buf
= make_uninit_string (0);
3615 p
->decoding_carryover
= make_number (0);
3616 p
->encoding_buf
= make_uninit_string (0);
3617 p
->encoding_carryover
= make_number (0);
3619 p
->inherit_coding_system_flag
3620 = (NILP (buffer
) ? Qnil
: ps
->inherit_coding_system_flag
);
3622 if (!NILP (ps
->log
))
3623 call3 (ps
->log
, server
, proc
,
3624 concat3 (build_string ("accept from "),
3625 (STRINGP (host
) ? host
: build_string ("-")),
3626 build_string ("\n")));
3628 if (!NILP (p
->sentinel
))
3629 exec_sentinel (proc
,
3630 concat3 (build_string ("open from "),
3631 (STRINGP (host
) ? host
: build_string ("-")),
3632 build_string ("\n")));
3635 /* This variable is different from waiting_for_input in keyboard.c.
3636 It is used to communicate to a lisp process-filter/sentinel (via the
3637 function Fwaiting_for_user_input_p below) whether emacs was waiting
3638 for user-input when that process-filter was called.
3639 waiting_for_input cannot be used as that is by definition 0 when
3640 lisp code is being evalled.
3641 This is also used in record_asynch_buffer_change.
3642 For that purpose, this must be 0
3643 when not inside wait_reading_process_input. */
3644 static int waiting_for_user_input_p
;
3646 /* This is here so breakpoints can be put on it. */
3648 wait_reading_process_input_1 ()
3652 /* Read and dispose of subprocess output while waiting for timeout to
3653 elapse and/or keyboard input to be available.
3656 timeout in seconds, or
3657 zero for no limit, or
3658 -1 means gobble data immediately available but don't wait for any.
3661 an additional duration to wait, measured in microseconds.
3662 If this is nonzero and time_limit is 0, then the timeout
3663 consists of MICROSECS only.
3665 READ_KBD is a lisp value:
3666 0 to ignore keyboard input, or
3667 1 to return when input is available, or
3668 -1 meaning caller will actually read the input, so don't throw to
3669 the quit handler, or
3670 a cons cell, meaning wait until its car is non-nil
3671 (and gobble terminal input into the buffer if any arrives), or
3672 a process object, meaning wait until something arrives from that
3673 process. The return value is true iff we read some input from
3676 DO_DISPLAY != 0 means redisplay should be done to show subprocess
3677 output that arrives.
3679 If READ_KBD is a pointer to a struct Lisp_Process, then the
3680 function returns true iff we received input from that process
3681 before the timeout elapsed.
3682 Otherwise, return true iff we received input from any process. */
3685 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
3686 int time_limit
, microsecs
;
3687 Lisp_Object read_kbd
;
3690 register int channel
, nfds
;
3691 static SELECT_TYPE Available
;
3692 static SELECT_TYPE Connecting
;
3693 int check_connect
, no_avail
;
3696 EMACS_TIME timeout
, end_time
;
3697 int wait_channel
= -1;
3698 struct Lisp_Process
*wait_proc
= 0;
3699 int got_some_input
= 0;
3700 /* Either nil or a cons cell, the car of which is of interest and
3701 may be changed outside of this routine. */
3702 Lisp_Object wait_for_cell
= Qnil
;
3704 FD_ZERO (&Available
);
3705 FD_ZERO (&Connecting
);
3707 /* If read_kbd is a process to watch, set wait_proc and wait_channel
3709 if (PROCESSP (read_kbd
))
3711 wait_proc
= XPROCESS (read_kbd
);
3712 wait_channel
= XINT (wait_proc
->infd
);
3713 XSETFASTINT (read_kbd
, 0);
3716 /* If waiting for non-nil in a cell, record where. */
3717 if (CONSP (read_kbd
))
3719 wait_for_cell
= read_kbd
;
3720 XSETFASTINT (read_kbd
, 0);
3723 waiting_for_user_input_p
= XINT (read_kbd
);
3725 /* Since we may need to wait several times,
3726 compute the absolute time to return at. */
3727 if (time_limit
|| microsecs
)
3729 EMACS_GET_TIME (end_time
);
3730 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
3731 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
3733 #ifdef POLLING_PROBLEM_IN_SELECT
3734 /* AlainF 5-Jul-1996
3735 HP-UX 10.10 seem to have problems with signals coming in
3736 Causes "poll: interrupted system call" messages when Emacs is run
3738 Turn off periodic alarms (in case they are in use),
3739 and then turn off any other atimers. */
3741 turn_on_atimers (0);
3746 int timeout_reduced_for_timers
= 0;
3748 /* If calling from keyboard input, do not quit
3749 since we want to return C-g as an input character.
3750 Otherwise, do pending quit if requested. */
3751 if (XINT (read_kbd
) >= 0)
3754 /* Exit now if the cell we're waiting for became non-nil. */
3755 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
3758 /* Compute time from now till when time limit is up */
3759 /* Exit if already run out */
3760 if (time_limit
== -1)
3762 /* -1 specified for timeout means
3763 gobble output available now
3764 but don't wait at all. */
3766 EMACS_SET_SECS_USECS (timeout
, 0, 0);
3768 else if (time_limit
|| microsecs
)
3770 EMACS_GET_TIME (timeout
);
3771 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
3772 if (EMACS_TIME_NEG_P (timeout
))
3777 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
3780 /* Normally we run timers here.
3781 But not if wait_for_cell; in those cases,
3782 the wait is supposed to be short,
3783 and those callers cannot handle running arbitrary Lisp code here. */
3784 if (NILP (wait_for_cell
))
3786 EMACS_TIME timer_delay
;
3790 int old_timers_run
= timers_run
;
3791 struct buffer
*old_buffer
= current_buffer
;
3793 timer_delay
= timer_check (1);
3795 /* If a timer has run, this might have changed buffers
3796 an alike. Make read_key_sequence aware of that. */
3797 if (timers_run
!= old_timers_run
3798 && old_buffer
!= current_buffer
3799 && waiting_for_user_input_p
== -1)
3800 record_asynch_buffer_change ();
3802 if (timers_run
!= old_timers_run
&& do_display
)
3803 /* We must retry, since a timer may have requeued itself
3804 and that could alter the time_delay. */
3805 redisplay_preserve_echo_area (9);
3809 while (!detect_input_pending ());
3811 /* If there is unread keyboard input, also return. */
3812 if (XINT (read_kbd
) != 0
3813 && requeued_events_pending_p ())
3816 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
3818 EMACS_TIME difference
;
3819 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
3820 if (EMACS_TIME_NEG_P (difference
))
3822 timeout
= timer_delay
;
3823 timeout_reduced_for_timers
= 1;
3826 /* If time_limit is -1, we are not going to wait at all. */
3827 else if (time_limit
!= -1)
3829 /* This is so a breakpoint can be put here. */
3830 wait_reading_process_input_1 ();
3834 /* Cause C-g and alarm signals to take immediate action,
3835 and cause input available signals to zero out timeout.
3837 It is important that we do this before checking for process
3838 activity. If we get a SIGCHLD after the explicit checks for
3839 process activity, timeout is the only way we will know. */
3840 if (XINT (read_kbd
) < 0)
3841 set_waiting_for_input (&timeout
);
3843 /* If status of something has changed, and no input is
3844 available, notify the user of the change right away. After
3845 this explicit check, we'll let the SIGCHLD handler zap
3846 timeout to get our attention. */
3847 if (update_tick
!= process_tick
&& do_display
)
3849 SELECT_TYPE Atemp
, Ctemp
;
3851 Atemp
= input_wait_mask
;
3853 /* On Mac OS X, the SELECT system call always says input is
3854 present (for reading) at stdin, even when none is. This
3855 causes the call to SELECT below to return 1 and
3856 status_notify not to be called. As a result output of
3857 subprocesses are incorrectly discarded. */
3860 Ctemp
= connect_wait_mask
;
3861 EMACS_SET_SECS_USECS (timeout
, 0, 0);
3862 if ((select (max (max_process_desc
, max_keyboard_desc
) + 1,
3864 (num_pending_connects
> 0 ? &Ctemp
: (SELECT_TYPE
*)0),
3865 (SELECT_TYPE
*)0, &timeout
)
3868 /* It's okay for us to do this and then continue with
3869 the loop, since timeout has already been zeroed out. */
3870 clear_waiting_for_input ();
3875 /* Don't wait for output from a non-running process. Just
3876 read whatever data has already been received. */
3877 if (wait_proc
!= 0 && !NILP (wait_proc
->raw_status_low
))
3878 update_status (wait_proc
);
3880 && ! EQ (wait_proc
->status
, Qrun
)
3881 && ! EQ (wait_proc
->status
, Qconnect
))
3883 int nread
, total_nread
= 0;
3885 clear_waiting_for_input ();
3886 XSETPROCESS (proc
, wait_proc
);
3888 /* Read data from the process, until we exhaust it. */
3889 while (XINT (wait_proc
->infd
) >= 0)
3891 nread
= read_process_output (proc
, XINT (wait_proc
->infd
));
3897 total_nread
+= nread
;
3899 else if (nread
== -1 && EIO
== errno
)
3903 else if (nread
== -1 && EAGAIN
== errno
)
3907 else if (nread
== -1 && EWOULDBLOCK
== errno
)
3911 if (total_nread
> 0 && do_display
)
3912 redisplay_preserve_echo_area (10);
3917 /* Wait till there is something to do */
3919 if (!NILP (wait_for_cell
))
3921 Available
= non_process_wait_mask
;
3926 if (! XINT (read_kbd
))
3927 Available
= non_keyboard_wait_mask
;
3929 Available
= input_wait_mask
;
3930 check_connect
= (num_pending_connects
> 0);
3933 /* If frame size has changed or the window is newly mapped,
3934 redisplay now, before we start to wait. There is a race
3935 condition here; if a SIGIO arrives between now and the select
3936 and indicates that a frame is trashed, the select may block
3937 displaying a trashed screen. */
3938 if (frame_garbaged
&& do_display
)
3940 clear_waiting_for_input ();
3941 redisplay_preserve_echo_area (11);
3942 if (XINT (read_kbd
) < 0)
3943 set_waiting_for_input (&timeout
);
3947 if (XINT (read_kbd
) && detect_input_pending ())
3955 Connecting
= connect_wait_mask
;
3956 nfds
= select (max (max_process_desc
, max_keyboard_desc
) + 1,
3958 (check_connect
? &Connecting
: (SELECT_TYPE
*)0),
3959 (SELECT_TYPE
*)0, &timeout
);
3964 /* Make C-g and alarm signals set flags again */
3965 clear_waiting_for_input ();
3967 /* If we woke up due to SIGWINCH, actually change size now. */
3968 do_pending_window_change (0);
3970 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
3971 /* We wanted the full specified time, so return now. */
3975 if (xerrno
== EINTR
)
3978 /* Ultrix select seems to return ENOMEM when it is
3979 interrupted. Treat it just like EINTR. Bleah. Note
3980 that we want to test for the "ultrix" CPP symbol, not
3981 "__ultrix__"; the latter is only defined under GCC, but
3982 not by DEC's bundled CC. -JimB */
3983 else if (xerrno
== ENOMEM
)
3987 /* This happens for no known reason on ALLIANT.
3988 I am guessing that this is the right response. -- RMS. */
3989 else if (xerrno
== EFAULT
)
3992 else if (xerrno
== EBADF
)
3995 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
3996 the child's closure of the pts gives the parent a SIGHUP, and
3997 the ptc file descriptor is automatically closed,
3998 yielding EBADF here or at select() call above.
3999 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4000 in m/ibmrt-aix.h), and here we just ignore the select error.
4001 Cleanup occurs c/o status_notify after SIGCLD. */
4002 no_avail
= 1; /* Cannot depend on values returned */
4008 error ("select error: %s", emacs_strerror (xerrno
));
4013 FD_ZERO (&Available
);
4017 #if defined(sun) && !defined(USG5_4)
4018 if (nfds
> 0 && keyboard_bit_set (&Available
)
4020 /* System sometimes fails to deliver SIGIO.
4022 David J. Mackenzie says that Emacs doesn't compile under
4023 Solaris if this code is enabled, thus the USG5_4 in the CPP
4024 conditional. "I haven't noticed any ill effects so far.
4025 If you find a Solaris expert somewhere, they might know
4027 kill (getpid (), SIGIO
);
4030 #if 0 /* When polling is used, interrupt_input is 0,
4031 so get_input_pending should read the input.
4032 So this should not be needed. */
4033 /* If we are using polling for input,
4034 and we see input available, make it get read now.
4035 Otherwise it might not actually get read for a second.
4036 And on hpux, since we turn off polling in wait_reading_process_input,
4037 it might never get read at all if we don't spend much time
4038 outside of wait_reading_process_input. */
4039 if (XINT (read_kbd
) && interrupt_input
4040 && keyboard_bit_set (&Available
)
4041 && input_polling_used ())
4042 kill (getpid (), SIGALRM
);
4045 /* Check for keyboard input */
4046 /* If there is any, return immediately
4047 to give it higher priority than subprocesses */
4049 if (XINT (read_kbd
) != 0)
4051 int old_timers_run
= timers_run
;
4052 struct buffer
*old_buffer
= current_buffer
;
4055 if (detect_input_pending_run_timers (do_display
))
4057 swallow_events (do_display
);
4058 if (detect_input_pending_run_timers (do_display
))
4062 /* If a timer has run, this might have changed buffers
4063 an alike. Make read_key_sequence aware of that. */
4064 if (timers_run
!= old_timers_run
4065 && waiting_for_user_input_p
== -1
4066 && old_buffer
!= current_buffer
)
4067 record_asynch_buffer_change ();
4073 /* If there is unread keyboard input, also return. */
4074 if (XINT (read_kbd
) != 0
4075 && requeued_events_pending_p ())
4078 /* If we are not checking for keyboard input now,
4079 do process events (but don't run any timers).
4080 This is so that X events will be processed.
4081 Otherwise they may have to wait until polling takes place.
4082 That would causes delays in pasting selections, for example.
4084 (We used to do this only if wait_for_cell.) */
4085 if (XINT (read_kbd
) == 0 && detect_input_pending ())
4087 swallow_events (do_display
);
4088 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4089 if (detect_input_pending ())
4094 /* Exit now if the cell we're waiting for became non-nil. */
4095 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4099 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4100 go read it. This can happen with X on BSD after logging out.
4101 In that case, there really is no input and no SIGIO,
4102 but select says there is input. */
4104 if (XINT (read_kbd
) && interrupt_input
4105 && keyboard_bit_set (&Available
))
4106 kill (getpid (), SIGIO
);
4110 got_some_input
|= nfds
> 0;
4112 /* If checking input just got us a size-change event from X,
4113 obey it now if we should. */
4114 if (XINT (read_kbd
) || ! NILP (wait_for_cell
))
4115 do_pending_window_change (0);
4117 /* Check for data from a process. */
4118 if (no_avail
|| nfds
== 0)
4121 /* Really FIRST_PROC_DESC should be 0 on Unix,
4122 but this is safer in the short run. */
4123 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4125 if (FD_ISSET (channel
, &Available
)
4126 && FD_ISSET (channel
, &non_keyboard_wait_mask
))
4130 /* If waiting for this channel, arrange to return as
4131 soon as no more input to be processed. No more
4133 if (wait_channel
== channel
)
4139 proc
= chan_process
[channel
];
4143 /* If this is a server stream socket, accept connection. */
4144 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4146 server_accept_connection (proc
, channel
);
4150 /* Read data from the process, starting with our
4151 buffered-ahead character if we have one. */
4153 nread
= read_process_output (proc
, channel
);
4156 /* Since read_process_output can run a filter,
4157 which can call accept-process-output,
4158 don't try to read from any other processes
4159 before doing the select again. */
4160 FD_ZERO (&Available
);
4163 redisplay_preserve_echo_area (12);
4166 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4169 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4170 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4172 else if (nread
== -1 && errno
== EAGAIN
)
4176 else if (nread
== -1 && errno
== EAGAIN
)
4178 /* Note that we cannot distinguish between no input
4179 available now and a closed pipe.
4180 With luck, a closed pipe will be accompanied by
4181 subprocess termination and SIGCHLD. */
4182 else if (nread
== 0 && !NETCONN_P (proc
))
4184 #endif /* O_NDELAY */
4185 #endif /* O_NONBLOCK */
4187 /* On some OSs with ptys, when the process on one end of
4188 a pty exits, the other end gets an error reading with
4189 errno = EIO instead of getting an EOF (0 bytes read).
4190 Therefore, if we get an error reading and errno =
4191 EIO, just continue, because the child process has
4192 exited and should clean itself up soon (e.g. when we
4195 However, it has been known to happen that the SIGCHLD
4196 got lost. So raise the signl again just in case.
4198 else if (nread
== -1 && errno
== EIO
)
4199 kill (getpid (), SIGCHLD
);
4200 #endif /* HAVE_PTYS */
4201 /* If we can detect process termination, don't consider the process
4202 gone just because its pipe is closed. */
4204 else if (nread
== 0 && !NETCONN_P (proc
))
4209 /* Preserve status of processes already terminated. */
4210 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
4211 deactivate_process (proc
);
4212 if (!NILP (XPROCESS (proc
)->raw_status_low
))
4213 update_status (XPROCESS (proc
));
4214 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4215 XPROCESS (proc
)->status
4216 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
4219 #ifdef NON_BLOCKING_CONNECT
4220 if (check_connect
&& FD_ISSET (channel
, &Connecting
))
4222 struct Lisp_Process
*p
;
4224 FD_CLR (channel
, &connect_wait_mask
);
4225 if (--num_pending_connects
< 0)
4228 proc
= chan_process
[channel
];
4232 p
= XPROCESS (proc
);
4235 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4236 So only use it on systems where it is known to work. */
4238 int xlen
= sizeof(xerrno
);
4239 if (getsockopt(channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4244 struct sockaddr pname
;
4245 int pnamelen
= sizeof(pname
);
4247 /* If connection failed, getpeername will fail. */
4249 if (getpeername(channel
, &pname
, &pnamelen
) < 0)
4251 /* Obtain connect failure code through error slippage. */
4254 if (errno
== ENOTCONN
&& read(channel
, &dummy
, 1) < 0)
4261 XSETINT (p
->tick
, ++process_tick
);
4262 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
4263 deactivate_process (proc
);
4268 /* Execute the sentinel here. If we had relied on
4269 status_notify to do it later, it will read input
4270 from the process before calling the sentinel. */
4271 exec_sentinel (proc
, build_string ("open\n"));
4272 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4274 FD_SET (XINT (p
->infd
), &input_wait_mask
);
4275 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
4279 #endif /* NON_BLOCKING_CONNECT */
4280 } /* end for each file descriptor */
4281 } /* end while exit conditions not met */
4283 waiting_for_user_input_p
= 0;
4285 /* If calling from keyboard input, do not quit
4286 since we want to return C-g as an input character.
4287 Otherwise, do pending quit if requested. */
4288 if (XINT (read_kbd
) >= 0)
4290 /* Prevent input_pending from remaining set if we quit. */
4291 clear_input_pending ();
4295 /* AlainF 5-Jul-1996
4296 HP-UX 10.10 seems to have problems with signals coming in
4297 Causes "poll: interrupted system call" messages when Emacs is run
4299 Turn periodic alarms back on */
4303 return got_some_input
;
4306 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
4309 read_process_output_call (fun_and_args
)
4310 Lisp_Object fun_and_args
;
4312 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
4316 read_process_output_error_handler (error
)
4319 cmd_error_internal (error
, "error in process filter: ");
4321 update_echo_area ();
4322 Fsleep_for (make_number (2), Qnil
);
4326 /* Read pending output from the process channel,
4327 starting with our buffered-ahead character if we have one.
4328 Yield number of decoded characters read.
4330 This function reads at most 1024 characters.
4331 If you want to read all available subprocess output,
4332 you must call it repeatedly until it returns zero.
4334 The characters read are decoded according to PROC's coding-system
4338 read_process_output (proc
, channel
)
4340 register int channel
;
4342 register int nchars
, nbytes
;
4344 register Lisp_Object outstream
;
4345 register struct buffer
*old
= current_buffer
;
4346 register struct Lisp_Process
*p
= XPROCESS (proc
);
4347 register int opoint
;
4348 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
4349 int carryover
= XINT (p
->decoding_carryover
);
4353 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
4355 vs
= get_vms_process_pointer (p
->pid
);
4359 return (0); /* Really weird if it does this */
4360 if (!(vs
->iosb
[0] & 1))
4361 return -1; /* I/O error */
4364 error ("Could not get VMS process pointer");
4365 chars
= vs
->inputBuffer
;
4366 nbytes
= clean_vms_buffer (chars
, vs
->iosb
[1]);
4369 start_vms_process_read (vs
); /* Crank up the next read on the process */
4370 return 1; /* Nothing worth printing, say we got 1 */
4374 /* The data carried over in the previous decoding (which are at
4375 the tail of decoding buffer) should be prepended to the new
4376 data read to decode all together. */
4377 chars
= (char *) alloca (nbytes
+ carryover
);
4378 bcopy (SDATA (p
->decoding_buf
), buf
, carryover
);
4379 bcopy (vs
->inputBuffer
, chars
+ carryover
, nbytes
);
4383 #ifdef DATAGRAM_SOCKETS
4384 /* A datagram is one packet; allow at least 1500+ bytes of data
4385 corresponding to the typical Ethernet frame size. */
4386 if (DATAGRAM_CHAN_P (channel
))
4388 /* carryover = 0; */ /* Does carryover make sense for datagrams? */
4393 chars
= (char *) alloca (carryover
+ readmax
);
4395 /* See the comment above. */
4396 bcopy (SDATA (p
->decoding_buf
), chars
, carryover
);
4398 #ifdef DATAGRAM_SOCKETS
4399 /* We have a working select, so proc_buffered_char is always -1. */
4400 if (DATAGRAM_CHAN_P (channel
))
4402 int len
= datagram_address
[channel
].len
;
4403 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
- carryover
,
4404 0, datagram_address
[channel
].sa
, &len
);
4408 if (proc_buffered_char
[channel
] < 0)
4409 nbytes
= emacs_read (channel
, chars
+ carryover
, readmax
- carryover
);
4412 chars
[carryover
] = proc_buffered_char
[channel
];
4413 proc_buffered_char
[channel
] = -1;
4414 nbytes
= emacs_read (channel
, chars
+ carryover
+ 1, readmax
- 1 - carryover
);
4418 nbytes
= nbytes
+ 1;
4420 #endif /* not VMS */
4422 XSETINT (p
->decoding_carryover
, 0);
4424 /* At this point, NBYTES holds number of bytes just received
4425 (including the one in proc_buffered_char[channel]). */
4428 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
4430 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
4433 /* Now set NBYTES how many bytes we must decode. */
4434 nbytes
+= carryover
;
4436 /* Read and dispose of the process output. */
4437 outstream
= p
->filter
;
4438 if (!NILP (outstream
))
4440 /* We inhibit quit here instead of just catching it so that
4441 hitting ^G when a filter happens to be running won't screw
4443 int count
= SPECPDL_INDEX ();
4444 Lisp_Object odeactivate
;
4445 Lisp_Object obuffer
, okeymap
;
4447 int outer_running_asynch_code
= running_asynch_code
;
4448 int waiting
= waiting_for_user_input_p
;
4450 /* No need to gcpro these, because all we do with them later
4451 is test them for EQness, and none of them should be a string. */
4452 odeactivate
= Vdeactivate_mark
;
4453 XSETBUFFER (obuffer
, current_buffer
);
4454 okeymap
= current_buffer
->keymap
;
4456 specbind (Qinhibit_quit
, Qt
);
4457 specbind (Qlast_nonmenu_event
, Qt
);
4459 /* In case we get recursively called,
4460 and we already saved the match data nonrecursively,
4461 save the same match data in safely recursive fashion. */
4462 if (outer_running_asynch_code
)
4465 /* Don't clobber the CURRENT match data, either! */
4466 tem
= Fmatch_data (Qnil
, Qnil
);
4467 restore_match_data ();
4468 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
4469 Fset_match_data (tem
);
4472 /* For speed, if a search happens within this code,
4473 save the match data in a special nonrecursive fashion. */
4474 running_asynch_code
= 1;
4476 text
= decode_coding_string (make_unibyte_string (chars
, nbytes
),
4478 if (NILP (buffer_defaults
.enable_multibyte_characters
))
4479 /* We had better return unibyte string. */
4480 text
= string_make_unibyte (text
);
4482 Vlast_coding_system_used
= coding
->symbol
;
4483 /* A new coding system might be found. */
4484 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
4486 p
->decode_coding_system
= coding
->symbol
;
4488 /* Don't call setup_coding_system for
4489 proc_decode_coding_system[channel] here. It is done in
4490 detect_coding called via decode_coding above. */
4492 /* If a coding system for encoding is not yet decided, we set
4493 it as the same as coding-system for decoding.
4495 But, before doing that we must check if
4496 proc_encode_coding_system[p->outfd] surely points to a
4497 valid memory because p->outfd will be changed once EOF is
4498 sent to the process. */
4499 if (NILP (p
->encode_coding_system
)
4500 && proc_encode_coding_system
[XINT (p
->outfd
)])
4502 p
->encode_coding_system
= coding
->symbol
;
4503 setup_coding_system (coding
->symbol
,
4504 proc_encode_coding_system
[XINT (p
->outfd
)]);
4508 carryover
= nbytes
- coding
->consumed
;
4509 bcopy (chars
+ coding
->consumed
, SDATA (p
->decoding_buf
),
4511 XSETINT (p
->decoding_carryover
, carryover
);
4512 nbytes
= SBYTES (text
);
4513 nchars
= SCHARS (text
);
4515 internal_condition_case_1 (read_process_output_call
,
4517 Fcons (proc
, Fcons (text
, Qnil
))),
4518 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
4519 read_process_output_error_handler
);
4521 /* If we saved the match data nonrecursively, restore it now. */
4522 restore_match_data ();
4523 running_asynch_code
= outer_running_asynch_code
;
4525 /* Handling the process output should not deactivate the mark. */
4526 Vdeactivate_mark
= odeactivate
;
4528 /* Restore waiting_for_user_input_p as it was
4529 when we were called, in case the filter clobbered it. */
4530 waiting_for_user_input_p
= waiting
;
4532 #if 0 /* Call record_asynch_buffer_change unconditionally,
4533 because we might have changed minor modes or other things
4534 that affect key bindings. */
4535 if (! EQ (Fcurrent_buffer (), obuffer
)
4536 || ! EQ (current_buffer
->keymap
, okeymap
))
4538 /* But do it only if the caller is actually going to read events.
4539 Otherwise there's no need to make him wake up, and it could
4540 cause trouble (for example it would make Fsit_for return). */
4541 if (waiting_for_user_input_p
== -1)
4542 record_asynch_buffer_change ();
4545 start_vms_process_read (vs
);
4547 unbind_to (count
, Qnil
);
4551 /* If no filter, write into buffer if it isn't dead. */
4552 if (!NILP (p
->buffer
) && !NILP (XBUFFER (p
->buffer
)->name
))
4554 Lisp_Object old_read_only
;
4555 int old_begv
, old_zv
;
4556 int old_begv_byte
, old_zv_byte
;
4557 Lisp_Object odeactivate
;
4558 int before
, before_byte
;
4563 odeactivate
= Vdeactivate_mark
;
4565 Fset_buffer (p
->buffer
);
4567 opoint_byte
= PT_BYTE
;
4568 old_read_only
= current_buffer
->read_only
;
4571 old_begv_byte
= BEGV_BYTE
;
4572 old_zv_byte
= ZV_BYTE
;
4574 current_buffer
->read_only
= Qnil
;
4576 /* Insert new output into buffer
4577 at the current end-of-output marker,
4578 thus preserving logical ordering of input and output. */
4579 if (XMARKER (p
->mark
)->buffer
)
4580 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
4581 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
4584 SET_PT_BOTH (ZV
, ZV_BYTE
);
4586 before_byte
= PT_BYTE
;
4588 /* If the output marker is outside of the visible region, save
4589 the restriction and widen. */
4590 if (! (BEGV
<= PT
&& PT
<= ZV
))
4593 text
= decode_coding_string (make_unibyte_string (chars
, nbytes
),
4595 Vlast_coding_system_used
= coding
->symbol
;
4596 /* A new coding system might be found. See the comment in the
4597 similar code in the previous `if' block. */
4598 if (!EQ (p
->decode_coding_system
, coding
->symbol
))
4600 p
->decode_coding_system
= coding
->symbol
;
4601 if (NILP (p
->encode_coding_system
)
4602 && proc_encode_coding_system
[XINT (p
->outfd
)])
4604 p
->encode_coding_system
= coding
->symbol
;
4605 setup_coding_system (coding
->symbol
,
4606 proc_encode_coding_system
[XINT (p
->outfd
)]);
4609 carryover
= nbytes
- coding
->consumed
;
4610 bcopy (chars
+ coding
->consumed
, SDATA (p
->decoding_buf
),
4612 XSETINT (p
->decoding_carryover
, carryover
);
4613 /* Adjust the multibyteness of TEXT to that of the buffer. */
4614 if (NILP (current_buffer
->enable_multibyte_characters
)
4615 != ! STRING_MULTIBYTE (text
))
4616 text
= (STRING_MULTIBYTE (text
)
4617 ? Fstring_as_unibyte (text
)
4618 : Fstring_as_multibyte (text
));
4619 nbytes
= SBYTES (text
);
4620 nchars
= SCHARS (text
);
4621 /* Insert before markers in case we are inserting where
4622 the buffer's mark is, and the user's next command is Meta-y. */
4623 insert_from_string_before_markers (text
, 0, 0, nchars
, nbytes
, 0);
4625 /* Make sure the process marker's position is valid when the
4626 process buffer is changed in the signal_after_change above.
4627 W3 is known to do that. */
4628 if (BUFFERP (p
->buffer
)
4629 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
4630 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
4632 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
4634 update_mode_lines
++;
4636 /* Make sure opoint and the old restrictions
4637 float ahead of any new text just as point would. */
4638 if (opoint
>= before
)
4640 opoint
+= PT
- before
;
4641 opoint_byte
+= PT_BYTE
- before_byte
;
4643 if (old_begv
> before
)
4645 old_begv
+= PT
- before
;
4646 old_begv_byte
+= PT_BYTE
- before_byte
;
4648 if (old_zv
>= before
)
4650 old_zv
+= PT
- before
;
4651 old_zv_byte
+= PT_BYTE
- before_byte
;
4654 /* If the restriction isn't what it should be, set it. */
4655 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
4656 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
4658 /* Handling the process output should not deactivate the mark. */
4659 Vdeactivate_mark
= odeactivate
;
4661 current_buffer
->read_only
= old_read_only
;
4662 SET_PT_BOTH (opoint
, opoint_byte
);
4663 set_buffer_internal (old
);
4666 start_vms_process_read (vs
);
4671 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
, Swaiting_for_user_input_p
,
4673 doc
: /* Returns non-nil if emacs is waiting for input from the user.
4674 This is intended for use by asynchronous process output filters and sentinels. */)
4677 return (waiting_for_user_input_p
? Qt
: Qnil
);
4680 /* Sending data to subprocess */
4682 jmp_buf send_process_frame
;
4683 Lisp_Object process_sent_to
;
4686 send_process_trap ()
4692 longjmp (send_process_frame
, 1);
4695 /* Send some data to process PROC.
4696 BUF is the beginning of the data; LEN is the number of characters.
4697 OBJECT is the Lisp object that the data comes from. If OBJECT is
4698 nil or t, it means that the data comes from C string.
4700 If OBJECT is not nil, the data is encoded by PROC's coding-system
4701 for encoding before it is sent.
4703 This function can evaluate Lisp code and can garbage collect. */
4706 send_process (proc
, buf
, len
, object
)
4707 volatile Lisp_Object proc
;
4708 unsigned char *volatile buf
;
4710 volatile Lisp_Object object
;
4712 /* Use volatile to protect variables from being clobbered by longjmp. */
4714 struct coding_system
*coding
;
4715 struct gcpro gcpro1
;
4720 struct Lisp_Process
*p
= XPROCESS (proc
);
4721 VMS_PROC_STUFF
*vs
, *get_vms_process_pointer();
4724 if (! NILP (XPROCESS (proc
)->raw_status_low
))
4725 update_status (XPROCESS (proc
));
4726 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
4727 error ("Process %s not running",
4728 SDATA (XPROCESS (proc
)->name
));
4729 if (XINT (XPROCESS (proc
)->outfd
) < 0)
4730 error ("Output file descriptor of %s is closed",
4731 SDATA (XPROCESS (proc
)->name
));
4733 coding
= proc_encode_coding_system
[XINT (XPROCESS (proc
)->outfd
)];
4734 Vlast_coding_system_used
= coding
->symbol
;
4736 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
4737 || (BUFFERP (object
)
4738 && !NILP (XBUFFER (object
)->enable_multibyte_characters
))
4741 if (!EQ (coding
->symbol
, XPROCESS (proc
)->encode_coding_system
))
4742 /* The coding system for encoding was changed to raw-text
4743 because we sent a unibyte text previously. Now we are
4744 sending a multibyte text, thus we must encode it by the
4745 original coding system specified for the current
4747 setup_coding_system (XPROCESS (proc
)->encode_coding_system
, coding
);
4748 /* src_multibyte should be set to 1 _after_ a call to
4749 setup_coding_system, since it resets src_multibyte to
4751 coding
->src_multibyte
= 1;
4755 /* For sending a unibyte text, character code conversion should
4756 not take place but EOL conversion should. So, setup raw-text
4757 or one of the subsidiary if we have not yet done it. */
4758 if (coding
->type
!= coding_type_raw_text
)
4760 if (CODING_REQUIRE_FLUSHING (coding
))
4762 /* But, before changing the coding, we must flush out data. */
4763 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
4764 send_process (proc
, "", 0, Qt
);
4766 coding
->src_multibyte
= 0;
4767 setup_raw_text_coding_system (coding
);
4770 coding
->dst_multibyte
= 0;
4772 if (CODING_REQUIRE_ENCODING (coding
))
4774 int require
= encoding_buffer_size (coding
, len
);
4775 int from_byte
= -1, from
= -1, to
= -1;
4776 unsigned char *temp_buf
= NULL
;
4778 if (BUFFERP (object
))
4780 from_byte
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
4781 from
= buf_bytepos_to_charpos (XBUFFER (object
), from_byte
);
4782 to
= buf_bytepos_to_charpos (XBUFFER (object
), from_byte
+ len
);
4784 else if (STRINGP (object
))
4786 from_byte
= buf
- SDATA (object
);
4787 from
= string_byte_to_char (object
, from_byte
);
4788 to
= string_byte_to_char (object
, from_byte
+ len
);
4791 if (coding
->composing
!= COMPOSITION_DISABLED
)
4794 coding_save_composition (coding
, from
, to
, object
);
4796 coding
->composing
= COMPOSITION_DISABLED
;
4799 if (SBYTES (XPROCESS (proc
)->encoding_buf
) < require
)
4800 XPROCESS (proc
)->encoding_buf
= make_uninit_string (require
);
4803 buf
= (BUFFERP (object
)
4804 ? BUF_BYTE_ADDRESS (XBUFFER (object
), from_byte
)
4805 : SDATA (object
) + from_byte
);
4807 object
= XPROCESS (proc
)->encoding_buf
;
4808 encode_coding (coding
, (char *) buf
, SDATA (object
),
4809 len
, SBYTES (object
));
4810 len
= coding
->produced
;
4811 buf
= SDATA (object
);
4817 vs
= get_vms_process_pointer (p
->pid
);
4819 error ("Could not find this process: %x", p
->pid
);
4820 else if (write_to_vms_process (vs
, buf
, len
))
4824 if (pty_max_bytes
== 0)
4826 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
4827 pty_max_bytes
= fpathconf (XFASTINT (XPROCESS (proc
)->outfd
),
4829 if (pty_max_bytes
< 0)
4830 pty_max_bytes
= 250;
4832 pty_max_bytes
= 250;
4834 /* Deduct one, to leave space for the eof. */
4838 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
4839 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
4840 when returning with longjmp despite being declared volatile. */
4841 if (!setjmp (send_process_frame
))
4843 process_sent_to
= proc
;
4847 SIGTYPE (*old_sigpipe
)();
4849 /* Decide how much data we can send in one batch.
4850 Long lines need to be split into multiple batches. */
4851 if (!NILP (XPROCESS (proc
)->pty_flag
))
4853 /* Starting this at zero is always correct when not the first
4854 iteration because the previous iteration ended by sending C-d.
4855 It may not be correct for the first iteration
4856 if a partial line was sent in a separate send_process call.
4857 If that proves worth handling, we need to save linepos
4858 in the process object. */
4860 unsigned char *ptr
= (unsigned char *) buf
;
4861 unsigned char *end
= (unsigned char *) buf
+ len
;
4863 /* Scan through this text for a line that is too long. */
4864 while (ptr
!= end
&& linepos
< pty_max_bytes
)
4872 /* If we found one, break the line there
4873 and put in a C-d to force the buffer through. */
4877 /* Send this batch, using one or more write calls. */
4880 int outfd
= XINT (XPROCESS (proc
)->outfd
);
4881 old_sigpipe
= (SIGTYPE (*) ()) signal (SIGPIPE
, send_process_trap
);
4882 #ifdef DATAGRAM_SOCKETS
4883 if (DATAGRAM_CHAN_P (outfd
))
4885 rv
= sendto (outfd
, (char *) buf
, this,
4886 0, datagram_address
[outfd
].sa
,
4887 datagram_address
[outfd
].len
);
4888 if (rv
< 0 && errno
== EMSGSIZE
)
4889 report_file_error ("sending datagram", Fcons (proc
, Qnil
));
4893 rv
= emacs_write (outfd
, (char *) buf
, this);
4894 signal (SIGPIPE
, old_sigpipe
);
4900 || errno
== EWOULDBLOCK
4906 /* Buffer is full. Wait, accepting input;
4907 that may allow the program
4908 to finish doing output and read more. */
4913 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
4914 /* A gross hack to work around a bug in FreeBSD.
4915 In the following sequence, read(2) returns
4919 write(2) 954 bytes, get EAGAIN
4920 read(2) 1024 bytes in process_read_output
4921 read(2) 11 bytes in process_read_output
4923 That is, read(2) returns more bytes than have
4924 ever been written successfully. The 1033 bytes
4925 read are the 1022 bytes written successfully
4926 after processing (for example with CRs added if
4927 the terminal is set up that way which it is
4928 here). The same bytes will be seen again in a
4929 later read(2), without the CRs. */
4931 if (errno
== EAGAIN
)
4934 ioctl (XINT (XPROCESS (proc
)->outfd
), TIOCFLUSH
,
4937 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
4939 /* Running filters might relocate buffers or strings.
4940 Arrange to relocate BUF. */
4941 if (BUFFERP (object
))
4942 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
), buf
);
4943 else if (STRINGP (object
))
4944 offset
= buf
- SDATA (object
);
4946 XSETFASTINT (zero
, 0);
4947 #ifdef EMACS_HAS_USECS
4948 wait_reading_process_input (0, 20000, zero
, 0);
4950 wait_reading_process_input (1, 0, zero
, 0);
4953 if (BUFFERP (object
))
4954 buf
= BUF_BYTE_ADDRESS (XBUFFER (object
), offset
);
4955 else if (STRINGP (object
))
4956 buf
= offset
+ SDATA (object
);
4961 /* This is a real error. */
4962 report_file_error ("writing to process", Fcons (proc
, Qnil
));
4969 /* If we sent just part of the string, put in an EOF
4970 to force it through, before we send the rest. */
4972 Fprocess_send_eof (proc
);
4975 #endif /* not VMS */
4979 proc
= process_sent_to
;
4981 XPROCESS (proc
)->raw_status_low
= Qnil
;
4982 XPROCESS (proc
)->raw_status_high
= Qnil
;
4983 XPROCESS (proc
)->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
4984 XSETINT (XPROCESS (proc
)->tick
, ++process_tick
);
4985 deactivate_process (proc
);
4987 error ("Error writing to process %s; closed it",
4988 SDATA (XPROCESS (proc
)->name
));
4990 error ("SIGPIPE raised on process %s; closed it",
4991 SDATA (XPROCESS (proc
)->name
));
4998 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5000 doc
: /* Send current contents of region as input to PROCESS.
5001 PROCESS may be a process, a buffer, the name of a process or buffer, or
5002 nil, indicating the current buffer's process.
5003 Called from program, takes three arguments, PROCESS, START and END.
5004 If the region is more than 500 characters long,
5005 it is sent in several bunches. This may happen even for shorter regions.
5006 Output from processes can arrive in between bunches. */)
5007 (process
, start
, end
)
5008 Lisp_Object process
, start
, end
;
5013 proc
= get_process (process
);
5014 validate_region (&start
, &end
);
5016 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5017 move_gap (XINT (start
));
5019 start1
= CHAR_TO_BYTE (XINT (start
));
5020 end1
= CHAR_TO_BYTE (XINT (end
));
5021 send_process (proc
, BYTE_POS_ADDR (start1
), end1
- start1
,
5022 Fcurrent_buffer ());
5027 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5029 doc
: /* Send PROCESS the contents of STRING as input.
5030 PROCESS may be a process, a buffer, the name of a process or buffer, or
5031 nil, indicating the current buffer's process.
5032 If STRING is more than 500 characters long,
5033 it is sent in several bunches. This may happen even for shorter strings.
5034 Output from processes can arrive in between bunches. */)
5036 Lisp_Object process
, string
;
5039 CHECK_STRING (string
);
5040 proc
= get_process (process
);
5041 send_process (proc
, SDATA (string
),
5042 SBYTES (string
), string
);
5046 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5047 Sprocess_running_child_p
, 0, 1, 0,
5048 doc
: /* Return t if PROCESS has given the terminal to a child.
5049 If the operating system does not make it possible to find out,
5050 return t unconditionally. */)
5052 Lisp_Object process
;
5054 /* Initialize in case ioctl doesn't exist or gives an error,
5055 in a way that will cause returning t. */
5058 struct Lisp_Process
*p
;
5060 proc
= get_process (process
);
5061 p
= XPROCESS (proc
);
5063 if (!EQ (p
->childp
, Qt
))
5064 error ("Process %s is not a subprocess",
5066 if (XINT (p
->infd
) < 0)
5067 error ("Process %s is not active",
5071 if (!NILP (p
->subtty
))
5072 ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
5074 ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
5075 #endif /* defined (TIOCGPGRP ) */
5077 if (gid
== XFASTINT (p
->pid
))
5082 /* send a signal number SIGNO to PROCESS.
5083 If CURRENT_GROUP is t, that means send to the process group
5084 that currently owns the terminal being used to communicate with PROCESS.
5085 This is used for various commands in shell mode.
5086 If CURRENT_GROUP is lambda, that means send to the process group
5087 that currently owns the terminal, but only if it is NOT the shell itself.
5089 If NOMSG is zero, insert signal-announcements into process's buffers
5092 If we can, we try to signal PROCESS by sending control characters
5093 down the pty. This allows us to signal inferiors who have changed
5094 their uid, for which killpg would return an EPERM error. */
5097 process_send_signal (process
, signo
, current_group
, nomsg
)
5098 Lisp_Object process
;
5100 Lisp_Object current_group
;
5104 register struct Lisp_Process
*p
;
5108 proc
= get_process (process
);
5109 p
= XPROCESS (proc
);
5111 if (!EQ (p
->childp
, Qt
))
5112 error ("Process %s is not a subprocess",
5114 if (XINT (p
->infd
) < 0)
5115 error ("Process %s is not active",
5118 if (NILP (p
->pty_flag
))
5119 current_group
= Qnil
;
5121 /* If we are using pgrps, get a pgrp number and make it negative. */
5122 if (NILP (current_group
))
5123 /* Send the signal to the shell's process group. */
5124 gid
= XFASTINT (p
->pid
);
5127 #ifdef SIGNALS_VIA_CHARACTERS
5128 /* If possible, send signals to the entire pgrp
5129 by sending an input character to it. */
5131 /* TERMIOS is the latest and bestest, and seems most likely to
5132 work. If the system has it, use it. */
5139 tcgetattr (XINT (p
->infd
), &t
);
5140 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
5144 tcgetattr (XINT (p
->infd
), &t
);
5145 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
5149 tcgetattr (XINT (p
->infd
), &t
);
5150 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5151 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
5153 send_process (proc
, &t
.c_cc
[VSUSP
], 1, Qnil
);
5158 #else /* ! HAVE_TERMIOS */
5160 /* On Berkeley descendants, the following IOCTL's retrieve the
5161 current control characters. */
5162 #if defined (TIOCGLTC) && defined (TIOCGETC)
5170 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
5171 send_process (proc
, &c
.t_intrc
, 1, Qnil
);
5174 ioctl (XINT (p
->infd
), TIOCGETC
, &c
);
5175 send_process (proc
, &c
.t_quitc
, 1, Qnil
);
5179 ioctl (XINT (p
->infd
), TIOCGLTC
, &lc
);
5180 send_process (proc
, &lc
.t_suspc
, 1, Qnil
);
5182 #endif /* ! defined (SIGTSTP) */
5185 #else /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
5187 /* On SYSV descendants, the TCGETA ioctl retrieves the current control
5194 ioctl (XINT (p
->infd
), TCGETA
, &t
);
5195 send_process (proc
, &t
.c_cc
[VINTR
], 1, Qnil
);
5198 ioctl (XINT (p
->infd
), TCGETA
, &t
);
5199 send_process (proc
, &t
.c_cc
[VQUIT
], 1, Qnil
);
5203 ioctl (XINT (p
->infd
), TCGETA
, &t
);
5204 send_process (proc
, &t
.c_cc
[VSWTCH
], 1, Qnil
);
5206 #endif /* ! defined (SIGTSTP) */
5208 #else /* ! defined (TCGETA) */
5209 Your configuration files are messed up
.
5210 /* If your system configuration files define SIGNALS_VIA_CHARACTERS,
5211 you'd better be using one of the alternatives above! */
5212 #endif /* ! defined (TCGETA) */
5213 #endif /* ! defined (TIOCGLTC) && defined (TIOCGETC) */
5214 #endif /* ! defined HAVE_TERMIOS */
5216 /* The code above always returns from the function. */
5217 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5220 /* Get the current pgrp using the tty itself, if we have that.
5221 Otherwise, use the pty to get the pgrp.
5222 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5223 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5224 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5225 His patch indicates that if TIOCGPGRP returns an error, then
5226 we should just assume that p->pid is also the process group id. */
5230 if (!NILP (p
->subtty
))
5231 err
= ioctl (XFASTINT (p
->subtty
), TIOCGPGRP
, &gid
);
5233 err
= ioctl (XINT (p
->infd
), TIOCGPGRP
, &gid
);
5236 /* If we can't get the information, assume
5237 the shell owns the tty. */
5238 gid
= XFASTINT (p
->pid
);
5241 /* It is not clear whether anything really can set GID to -1.
5242 Perhaps on some system one of those ioctls can or could do so.
5243 Or perhaps this is vestigial. */
5246 #else /* ! defined (TIOCGPGRP ) */
5247 /* Can't select pgrps on this system, so we know that
5248 the child itself heads the pgrp. */
5249 gid
= XFASTINT (p
->pid
);
5250 #endif /* ! defined (TIOCGPGRP ) */
5252 /* If current_group is lambda, and the shell owns the terminal,
5253 don't send any signal. */
5254 if (EQ (current_group
, Qlambda
) && gid
== XFASTINT (p
->pid
))
5262 p
->raw_status_low
= Qnil
;
5263 p
->raw_status_high
= Qnil
;
5265 XSETINT (p
->tick
, ++process_tick
);
5269 #endif /* ! defined (SIGCONT) */
5272 send_process (proc
, "\003", 1, Qnil
); /* ^C */
5277 send_process (proc
, "\031", 1, Qnil
); /* ^Y */
5282 sys$
forcex (&(XFASTINT (p
->pid
)), 0, 1);
5285 flush_pending_output (XINT (p
->infd
));
5289 /* If we don't have process groups, send the signal to the immediate
5290 subprocess. That isn't really right, but it's better than any
5291 obvious alternative. */
5294 kill (XFASTINT (p
->pid
), signo
);
5298 /* gid may be a pid, or minus a pgrp's number */
5300 if (!NILP (current_group
))
5301 ioctl (XINT (p
->infd
), TIOCSIGSEND
, signo
);
5304 gid
= - XFASTINT (p
->pid
);
5307 #else /* ! defined (TIOCSIGSEND) */
5308 EMACS_KILLPG (gid
, signo
);
5309 #endif /* ! defined (TIOCSIGSEND) */
5312 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
5313 doc
: /* Interrupt process PROCESS.
5314 PROCESS may be a process, a buffer, or the name of a process or buffer.
5315 nil or no arg means current buffer's process.
5316 Second arg CURRENT-GROUP non-nil means send signal to
5317 the current process-group of the process's controlling terminal
5318 rather than to the process's own process group.
5319 If the process is a shell, this means interrupt current subjob
5320 rather than the shell.
5322 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
5323 don't send the signal. */)
5324 (process
, current_group
)
5325 Lisp_Object process
, current_group
;
5327 process_send_signal (process
, SIGINT
, current_group
, 0);
5331 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
5332 doc
: /* Kill process PROCESS. May be process or name of one.
5333 See function `interrupt-process' for more details on usage. */)
5334 (process
, current_group
)
5335 Lisp_Object process
, current_group
;
5337 process_send_signal (process
, SIGKILL
, current_group
, 0);
5341 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
5342 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
5343 See function `interrupt-process' for more details on usage. */)
5344 (process
, current_group
)
5345 Lisp_Object process
, current_group
;
5347 process_send_signal (process
, SIGQUIT
, current_group
, 0);
5351 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
5352 doc
: /* Stop process PROCESS. May be process or name of one.
5353 See function `interrupt-process' for more details on usage.
5354 If PROCESS is a network process, inhibit handling of incoming traffic. */)
5355 (process
, current_group
)
5356 Lisp_Object process
, current_group
;
5359 if (PROCESSP (process
) && NETCONN_P (process
))
5361 struct Lisp_Process
*p
;
5363 p
= XPROCESS (process
);
5364 if (NILP (p
->command
)
5365 && XINT (p
->infd
) >= 0)
5367 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
5368 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
5375 error ("no SIGTSTP support");
5377 process_send_signal (process
, SIGTSTP
, current_group
, 0);
5382 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
5383 doc
: /* Continue process PROCESS. May be process or name of one.
5384 See function `interrupt-process' for more details on usage.
5385 If PROCESS is a network process, resume handling of incoming traffic. */)
5386 (process
, current_group
)
5387 Lisp_Object process
, current_group
;
5390 if (PROCESSP (process
) && NETCONN_P (process
))
5392 struct Lisp_Process
*p
;
5394 p
= XPROCESS (process
);
5395 if (EQ (p
->command
, Qt
)
5396 && XINT (p
->infd
) >= 0
5397 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
5399 FD_SET (XINT (p
->infd
), &input_wait_mask
);
5400 FD_SET (XINT (p
->infd
), &non_keyboard_wait_mask
);
5407 process_send_signal (process
, SIGCONT
, current_group
, 0);
5409 error ("no SIGCONT support");
5414 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
5415 2, 2, "sProcess (name or number): \nnSignal code: ",
5416 doc
: /* Send PROCESS the signal with code SIGCODE.
5417 PROCESS may also be an integer specifying the process id of the
5418 process to signal; in this case, the process need not be a child of
5420 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
5422 Lisp_Object process
, sigcode
;
5426 if (INTEGERP (process
))
5432 if (STRINGP (process
))
5435 if (tem
= Fget_process (process
), NILP (tem
))
5437 pid
= Fstring_to_number (process
, make_number (10));
5438 if (XINT (pid
) != 0)
5444 process
= get_process (process
);
5449 CHECK_PROCESS (process
);
5450 pid
= XPROCESS (process
)->pid
;
5451 if (!INTEGERP (pid
) || XINT (pid
) <= 0)
5452 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
5456 #define handle_signal(NAME, VALUE) \
5457 else if (!strcmp (name, NAME)) \
5458 XSETINT (sigcode, VALUE)
5460 if (INTEGERP (sigcode
))
5464 unsigned char *name
;
5466 CHECK_SYMBOL (sigcode
);
5467 name
= SDATA (SYMBOL_NAME (sigcode
));
5472 handle_signal ("SIGHUP", SIGHUP
);
5475 handle_signal ("SIGINT", SIGINT
);
5478 handle_signal ("SIGQUIT", SIGQUIT
);
5481 handle_signal ("SIGILL", SIGILL
);
5484 handle_signal ("SIGABRT", SIGABRT
);
5487 handle_signal ("SIGEMT", SIGEMT
);
5490 handle_signal ("SIGKILL", SIGKILL
);
5493 handle_signal ("SIGFPE", SIGFPE
);
5496 handle_signal ("SIGBUS", SIGBUS
);
5499 handle_signal ("SIGSEGV", SIGSEGV
);
5502 handle_signal ("SIGSYS", SIGSYS
);
5505 handle_signal ("SIGPIPE", SIGPIPE
);
5508 handle_signal ("SIGALRM", SIGALRM
);
5511 handle_signal ("SIGTERM", SIGTERM
);
5514 handle_signal ("SIGURG", SIGURG
);
5517 handle_signal ("SIGSTOP", SIGSTOP
);
5520 handle_signal ("SIGTSTP", SIGTSTP
);
5523 handle_signal ("SIGCONT", SIGCONT
);
5526 handle_signal ("SIGCHLD", SIGCHLD
);
5529 handle_signal ("SIGTTIN", SIGTTIN
);
5532 handle_signal ("SIGTTOU", SIGTTOU
);
5535 handle_signal ("SIGIO", SIGIO
);
5538 handle_signal ("SIGXCPU", SIGXCPU
);
5541 handle_signal ("SIGXFSZ", SIGXFSZ
);
5544 handle_signal ("SIGVTALRM", SIGVTALRM
);
5547 handle_signal ("SIGPROF", SIGPROF
);
5550 handle_signal ("SIGWINCH", SIGWINCH
);
5553 handle_signal ("SIGINFO", SIGINFO
);
5556 handle_signal ("SIGUSR1", SIGUSR1
);
5559 handle_signal ("SIGUSR2", SIGUSR2
);
5562 error ("Undefined signal name %s", name
);
5565 #undef handle_signal
5567 return make_number (kill (XINT (pid
), XINT (sigcode
)));
5570 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
5571 doc
: /* Make PROCESS see end-of-file in its input.
5572 EOF comes after any text already sent to it.
5573 PROCESS may be a process, a buffer, the name of a process or buffer, or
5574 nil, indicating the current buffer's process.
5575 If PROCESS is a network connection, or is a process communicating
5576 through a pipe (as opposed to a pty), then you cannot send any more
5577 text to PROCESS after you call this function. */)
5579 Lisp_Object process
;
5582 struct coding_system
*coding
;
5584 if (DATAGRAM_CONN_P (process
))
5587 proc
= get_process (process
);
5588 coding
= proc_encode_coding_system
[XINT (XPROCESS (proc
)->outfd
)];
5590 /* Make sure the process is really alive. */
5591 if (! NILP (XPROCESS (proc
)->raw_status_low
))
5592 update_status (XPROCESS (proc
));
5593 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
5594 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
5596 if (CODING_REQUIRE_FLUSHING (coding
))
5598 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5599 send_process (proc
, "", 0, Qnil
);
5603 send_process (proc
, "\032", 1, Qnil
); /* ^z */
5605 if (!NILP (XPROCESS (proc
)->pty_flag
))
5606 send_process (proc
, "\004", 1, Qnil
);
5609 int old_outfd
, new_outfd
;
5611 #ifdef HAVE_SHUTDOWN
5612 /* If this is a network connection, or socketpair is used
5613 for communication with the subprocess, call shutdown to cause EOF.
5614 (In some old system, shutdown to socketpair doesn't work.
5615 Then we just can't win.) */
5616 if (NILP (XPROCESS (proc
)->pid
)
5617 || XINT (XPROCESS (proc
)->outfd
) == XINT (XPROCESS (proc
)->infd
))
5618 shutdown (XINT (XPROCESS (proc
)->outfd
), 1);
5619 /* In case of socketpair, outfd == infd, so don't close it. */
5620 if (XINT (XPROCESS (proc
)->outfd
) != XINT (XPROCESS (proc
)->infd
))
5621 emacs_close (XINT (XPROCESS (proc
)->outfd
));
5622 #else /* not HAVE_SHUTDOWN */
5623 emacs_close (XINT (XPROCESS (proc
)->outfd
));
5624 #endif /* not HAVE_SHUTDOWN */
5625 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
5626 old_outfd
= XINT (XPROCESS (proc
)->outfd
);
5628 if (!proc_encode_coding_system
[new_outfd
])
5629 proc_encode_coding_system
[new_outfd
]
5630 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
5631 bcopy (proc_encode_coding_system
[old_outfd
],
5632 proc_encode_coding_system
[new_outfd
],
5633 sizeof (struct coding_system
));
5634 bzero (proc_encode_coding_system
[old_outfd
],
5635 sizeof (struct coding_system
));
5637 XSETINT (XPROCESS (proc
)->outfd
, new_outfd
);
5643 /* Kill all processes associated with `buffer'.
5644 If `buffer' is nil, kill all processes */
5647 kill_buffer_processes (buffer
)
5650 Lisp_Object tail
, proc
;
5652 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
5654 proc
= XCDR (XCAR (tail
));
5655 if (GC_PROCESSP (proc
)
5656 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
5658 if (NETCONN_P (proc
))
5659 Fdelete_process (proc
);
5660 else if (XINT (XPROCESS (proc
)->infd
) >= 0)
5661 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
5666 /* On receipt of a signal that a child status has changed, loop asking
5667 about children with changed statuses until the system says there
5670 All we do is change the status; we do not run sentinels or print
5671 notifications. That is saved for the next time keyboard input is
5672 done, in order to avoid timing errors.
5674 ** WARNING: this can be called during garbage collection.
5675 Therefore, it must not be fooled by the presence of mark bits in
5678 ** USG WARNING: Although it is not obvious from the documentation
5679 in signal(2), on a USG system the SIGCLD handler MUST NOT call
5680 signal() before executing at least one wait(), otherwise the
5681 handler will be called again, resulting in an infinite loop. The
5682 relevant portion of the documentation reads "SIGCLD signals will be
5683 queued and the signal-catching function will be continually
5684 reentered until the queue is empty". Invoking signal() causes the
5685 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
5689 sigchld_handler (signo
)
5692 int old_errno
= errno
;
5694 register struct Lisp_Process
*p
;
5695 extern EMACS_TIME
*input_available_clear_time
;
5699 sigheld
|= sigbit (SIGCHLD
);
5711 #endif /* no WUNTRACED */
5712 /* Keep trying to get a status until we get a definitive result. */
5716 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
5718 while (pid
< 0 && errno
== EINTR
);
5722 /* PID == 0 means no processes found, PID == -1 means a real
5723 failure. We have done all our job, so return. */
5725 /* USG systems forget handlers when they are used;
5726 must reestablish each time */
5727 #if defined (USG) && !defined (POSIX_SIGNALS)
5728 signal (signo
, sigchld_handler
); /* WARNING - must come after wait3() */
5731 sigheld
&= ~sigbit (SIGCHLD
);
5739 #endif /* no WNOHANG */
5741 /* Find the process that signaled us, and record its status. */
5744 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
5746 proc
= XCDR (XCAR (tail
));
5747 p
= XPROCESS (proc
);
5748 if (GC_EQ (p
->childp
, Qt
) && XINT (p
->pid
) == pid
)
5753 /* Look for an asynchronous process whose pid hasn't been filled
5756 for (tail
= Vprocess_alist
; GC_CONSP (tail
); tail
= XCDR (tail
))
5758 proc
= XCDR (XCAR (tail
));
5759 p
= XPROCESS (proc
);
5760 if (GC_INTEGERP (p
->pid
) && XINT (p
->pid
) == -1)
5765 /* Change the status of the process that was found. */
5768 union { int i
; WAITTYPE wt
; } u
;
5769 int clear_desc_flag
= 0;
5771 XSETINT (p
->tick
, ++process_tick
);
5773 XSETINT (p
->raw_status_low
, u
.i
& 0xffff);
5774 XSETINT (p
->raw_status_high
, u
.i
>> 16);
5776 /* If process has terminated, stop waiting for its output. */
5777 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
5778 && XINT (p
->infd
) >= 0)
5779 clear_desc_flag
= 1;
5781 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
5782 if (clear_desc_flag
)
5784 FD_CLR (XINT (p
->infd
), &input_wait_mask
);
5785 FD_CLR (XINT (p
->infd
), &non_keyboard_wait_mask
);
5788 /* Tell wait_reading_process_input that it needs to wake up and
5790 if (input_available_clear_time
)
5791 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
5794 /* There was no asynchronous process found for that id. Check
5795 if we have a synchronous process. */
5798 synch_process_alive
= 0;
5800 /* Report the status of the synchronous process. */
5802 synch_process_retcode
= WRETCODE (w
);
5803 else if (WIFSIGNALED (w
))
5805 int code
= WTERMSIG (w
);
5808 synchronize_system_messages_locale ();
5809 signame
= strsignal (code
);
5812 signame
= "unknown";
5814 synch_process_death
= signame
;
5817 /* Tell wait_reading_process_input that it needs to wake up and
5819 if (input_available_clear_time
)
5820 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
5823 /* On some systems, we must return right away.
5824 If any more processes want to signal us, we will
5826 Otherwise (on systems that have WNOHANG), loop around
5827 to use up all the processes that have something to tell us. */
5828 #if (defined WINDOWSNT \
5829 || (defined USG && !defined GNU_LINUX \
5830 && !(defined HPUX && defined WNOHANG)))
5831 #if defined (USG) && ! defined (POSIX_SIGNALS)
5832 signal (signo
, sigchld_handler
);
5836 #endif /* USG, but not HPUX with WNOHANG */
5842 exec_sentinel_unwind (data
)
5845 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
5850 exec_sentinel_error_handler (error
)
5853 cmd_error_internal (error
, "error in process sentinel: ");
5855 update_echo_area ();
5856 Fsleep_for (make_number (2), Qnil
);
5861 exec_sentinel (proc
, reason
)
5862 Lisp_Object proc
, reason
;
5864 Lisp_Object sentinel
, obuffer
, odeactivate
, okeymap
;
5865 register struct Lisp_Process
*p
= XPROCESS (proc
);
5866 int count
= SPECPDL_INDEX ();
5867 int outer_running_asynch_code
= running_asynch_code
;
5868 int waiting
= waiting_for_user_input_p
;
5870 /* No need to gcpro these, because all we do with them later
5871 is test them for EQness, and none of them should be a string. */
5872 odeactivate
= Vdeactivate_mark
;
5873 XSETBUFFER (obuffer
, current_buffer
);
5874 okeymap
= current_buffer
->keymap
;
5876 sentinel
= p
->sentinel
;
5877 if (NILP (sentinel
))
5880 /* Zilch the sentinel while it's running, to avoid recursive invocations;
5881 assure that it gets restored no matter how the sentinel exits. */
5883 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
5884 /* Inhibit quit so that random quits don't screw up a running filter. */
5885 specbind (Qinhibit_quit
, Qt
);
5886 specbind (Qlast_nonmenu_event
, Qt
);
5888 /* In case we get recursively called,
5889 and we already saved the match data nonrecursively,
5890 save the same match data in safely recursive fashion. */
5891 if (outer_running_asynch_code
)
5894 tem
= Fmatch_data (Qnil
, Qnil
);
5895 restore_match_data ();
5896 record_unwind_protect (Fset_match_data
, Fmatch_data (Qnil
, Qnil
));
5897 Fset_match_data (tem
);
5900 /* For speed, if a search happens within this code,
5901 save the match data in a special nonrecursive fashion. */
5902 running_asynch_code
= 1;
5904 internal_condition_case_1 (read_process_output_call
,
5906 Fcons (proc
, Fcons (reason
, Qnil
))),
5907 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5908 exec_sentinel_error_handler
);
5910 /* If we saved the match data nonrecursively, restore it now. */
5911 restore_match_data ();
5912 running_asynch_code
= outer_running_asynch_code
;
5914 Vdeactivate_mark
= odeactivate
;
5916 /* Restore waiting_for_user_input_p as it was
5917 when we were called, in case the filter clobbered it. */
5918 waiting_for_user_input_p
= waiting
;
5921 if (! EQ (Fcurrent_buffer (), obuffer
)
5922 || ! EQ (current_buffer
->keymap
, okeymap
))
5924 /* But do it only if the caller is actually going to read events.
5925 Otherwise there's no need to make him wake up, and it could
5926 cause trouble (for example it would make Fsit_for return). */
5927 if (waiting_for_user_input_p
== -1)
5928 record_asynch_buffer_change ();
5930 unbind_to (count
, Qnil
);
5933 /* Report all recent events of a change in process status
5934 (either run the sentinel or output a message).
5935 This is usually done while Emacs is waiting for keyboard input
5936 but can be done at other times. */
5941 register Lisp_Object proc
, buffer
;
5942 Lisp_Object tail
, msg
;
5943 struct gcpro gcpro1
, gcpro2
;
5947 /* We need to gcpro tail; if read_process_output calls a filter
5948 which deletes a process and removes the cons to which tail points
5949 from Vprocess_alist, and then causes a GC, tail is an unprotected
5953 /* Set this now, so that if new processes are created by sentinels
5954 that we run, we get called again to handle their status changes. */
5955 update_tick
= process_tick
;
5957 for (tail
= Vprocess_alist
; !NILP (tail
); tail
= Fcdr (tail
))
5960 register struct Lisp_Process
*p
;
5962 proc
= Fcdr (Fcar (tail
));
5963 p
= XPROCESS (proc
);
5965 if (XINT (p
->tick
) != XINT (p
->update_tick
))
5967 XSETINT (p
->update_tick
, XINT (p
->tick
));
5969 /* If process is still active, read any output that remains. */
5970 while (! EQ (p
->filter
, Qt
)
5971 && ! EQ (p
->status
, Qconnect
)
5972 && ! EQ (p
->status
, Qlisten
)
5973 && ! EQ (p
->command
, Qt
) /* Network process not stopped. */
5974 && XINT (p
->infd
) >= 0
5975 && read_process_output (proc
, XINT (p
->infd
)) > 0);
5979 /* Get the text to use for the message. */
5980 if (!NILP (p
->raw_status_low
))
5982 msg
= status_message (p
->status
);
5984 /* If process is terminated, deactivate it or delete it. */
5986 if (CONSP (p
->status
))
5987 symbol
= XCAR (p
->status
);
5989 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
5990 || EQ (symbol
, Qclosed
))
5992 if (delete_exited_processes
)
5993 remove_process (proc
);
5995 deactivate_process (proc
);
5998 /* The actions above may have further incremented p->tick.
5999 So set p->update_tick again
6000 so that an error in the sentinel will not cause
6001 this code to be run again. */
6002 XSETINT (p
->update_tick
, XINT (p
->tick
));
6003 /* Now output the message suitably. */
6004 if (!NILP (p
->sentinel
))
6005 exec_sentinel (proc
, msg
);
6006 /* Don't bother with a message in the buffer
6007 when a process becomes runnable. */
6008 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6010 Lisp_Object ro
, tem
;
6011 struct buffer
*old
= current_buffer
;
6012 int opoint
, opoint_byte
;
6013 int before
, before_byte
;
6015 ro
= XBUFFER (buffer
)->read_only
;
6017 /* Avoid error if buffer is deleted
6018 (probably that's why the process is dead, too) */
6019 if (NILP (XBUFFER (buffer
)->name
))
6021 Fset_buffer (buffer
);
6024 opoint_byte
= PT_BYTE
;
6025 /* Insert new output into buffer
6026 at the current end-of-output marker,
6027 thus preserving logical ordering of input and output. */
6028 if (XMARKER (p
->mark
)->buffer
)
6029 Fgoto_char (p
->mark
);
6031 SET_PT_BOTH (ZV
, ZV_BYTE
);
6034 before_byte
= PT_BYTE
;
6036 tem
= current_buffer
->read_only
;
6037 current_buffer
->read_only
= Qnil
;
6038 insert_string ("\nProcess ");
6039 Finsert (1, &p
->name
);
6040 insert_string (" ");
6042 current_buffer
->read_only
= tem
;
6043 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6045 if (opoint
>= before
)
6046 SET_PT_BOTH (opoint
+ (PT
- before
),
6047 opoint_byte
+ (PT_BYTE
- before_byte
));
6049 SET_PT_BOTH (opoint
, opoint_byte
);
6051 set_buffer_internal (old
);
6056 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6057 redisplay_preserve_echo_area (13);
6063 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6064 Sset_process_coding_system
, 1, 3, 0,
6065 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6066 DECODING will be used to decode subprocess output and ENCODING to
6067 encode subprocess input. */)
6068 (proc
, decoding
, encoding
)
6069 register Lisp_Object proc
, decoding
, encoding
;
6071 register struct Lisp_Process
*p
;
6073 CHECK_PROCESS (proc
);
6074 p
= XPROCESS (proc
);
6075 if (XINT (p
->infd
) < 0)
6076 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6077 if (XINT (p
->outfd
) < 0)
6078 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6080 p
->decode_coding_system
= Fcheck_coding_system (decoding
);
6081 p
->encode_coding_system
= Fcheck_coding_system (encoding
);
6082 setup_coding_system (decoding
,
6083 proc_decode_coding_system
[XINT (p
->infd
)]);
6084 setup_coding_system (encoding
,
6085 proc_encode_coding_system
[XINT (p
->outfd
)]);
6090 DEFUN ("process-coding-system",
6091 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6092 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6094 register Lisp_Object proc
;
6096 CHECK_PROCESS (proc
);
6097 return Fcons (XPROCESS (proc
)->decode_coding_system
,
6098 XPROCESS (proc
)->encode_coding_system
);
6101 /* The first time this is called, assume keyboard input comes from DESC
6102 instead of from where we used to expect it.
6103 Subsequent calls mean assume input keyboard can come from DESC
6104 in addition to other places. */
6106 static int add_keyboard_wait_descriptor_called_flag
;
6109 add_keyboard_wait_descriptor (desc
)
6112 if (! add_keyboard_wait_descriptor_called_flag
)
6113 FD_CLR (0, &input_wait_mask
);
6114 add_keyboard_wait_descriptor_called_flag
= 1;
6115 FD_SET (desc
, &input_wait_mask
);
6116 FD_SET (desc
, &non_process_wait_mask
);
6117 if (desc
> max_keyboard_desc
)
6118 max_keyboard_desc
= desc
;
6121 /* From now on, do not expect DESC to give keyboard input. */
6124 delete_keyboard_wait_descriptor (desc
)
6128 int lim
= max_keyboard_desc
;
6130 FD_CLR (desc
, &input_wait_mask
);
6131 FD_CLR (desc
, &non_process_wait_mask
);
6133 if (desc
== max_keyboard_desc
)
6134 for (fd
= 0; fd
< lim
; fd
++)
6135 if (FD_ISSET (fd
, &input_wait_mask
)
6136 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6137 max_keyboard_desc
= fd
;
6140 /* Return nonzero if *MASK has a bit set
6141 that corresponds to one of the keyboard input descriptors. */
6144 keyboard_bit_set (mask
)
6149 for (fd
= 0; fd
<= max_keyboard_desc
; fd
++)
6150 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6151 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6164 if (! noninteractive
|| initialized
)
6166 signal (SIGCHLD
, sigchld_handler
);
6169 FD_ZERO (&input_wait_mask
);
6170 FD_ZERO (&non_keyboard_wait_mask
);
6171 FD_ZERO (&non_process_wait_mask
);
6172 max_process_desc
= 0;
6174 FD_SET (0, &input_wait_mask
);
6176 Vprocess_alist
= Qnil
;
6177 for (i
= 0; i
< MAXDESC
; i
++)
6179 chan_process
[i
] = Qnil
;
6180 proc_buffered_char
[i
] = -1;
6182 bzero (proc_decode_coding_system
, sizeof proc_decode_coding_system
);
6183 bzero (proc_encode_coding_system
, sizeof proc_encode_coding_system
);
6184 #ifdef DATAGRAM_SOCKETS
6185 bzero (datagram_address
, sizeof datagram_address
);
6190 Lisp_Object subfeatures
= Qnil
;
6191 #define ADD_SUBFEATURE(key, val) \
6192 subfeatures = Fcons (Fcons (key, Fcons (val, Qnil)), subfeatures)
6194 #ifdef NON_BLOCKING_CONNECT
6195 ADD_SUBFEATURE (QCnowait
, Qt
);
6197 #ifdef DATAGRAM_SOCKETS
6198 ADD_SUBFEATURE (QCtype
, Qdatagram
);
6200 #ifdef HAVE_LOCAL_SOCKETS
6201 ADD_SUBFEATURE (QCfamily
, Qlocal
);
6203 #ifdef HAVE_GETSOCKNAME
6204 ADD_SUBFEATURE (QCservice
, Qt
);
6206 #if !defined(TERM) && (defined(O_NONBLOCK) || defined(O_NDELAY))
6207 ADD_SUBFEATURE (QCserver
, Qt
);
6209 #ifdef SO_BINDTODEVICE
6210 ADD_SUBFEATURE (QCoptions
, intern ("bindtodevice"));
6213 ADD_SUBFEATURE (QCoptions
, intern ("broadcast"));
6216 ADD_SUBFEATURE (QCoptions
, intern ("dontroute"));
6219 ADD_SUBFEATURE (QCoptions
, intern ("keepalive"));
6222 ADD_SUBFEATURE (QCoptions
, intern ("linger"));
6225 ADD_SUBFEATURE (QCoptions
, intern ("oobinline"));
6228 ADD_SUBFEATURE (QCoptions
, intern ("priority"));
6231 ADD_SUBFEATURE (QCoptions
, intern ("reuseaddr"));
6233 Fprovide (intern ("make-network-process"), subfeatures
);
6235 #endif /* HAVE_SOCKETS */
6241 Qprocessp
= intern ("processp");
6242 staticpro (&Qprocessp
);
6243 Qrun
= intern ("run");
6245 Qstop
= intern ("stop");
6247 Qsignal
= intern ("signal");
6248 staticpro (&Qsignal
);
6250 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
6253 Qexit = intern ("exit");
6254 staticpro (&Qexit); */
6256 Qopen
= intern ("open");
6258 Qclosed
= intern ("closed");
6259 staticpro (&Qclosed
);
6260 Qconnect
= intern ("connect");
6261 staticpro (&Qconnect
);
6262 Qfailed
= intern ("failed");
6263 staticpro (&Qfailed
);
6264 Qlisten
= intern ("listen");
6265 staticpro (&Qlisten
);
6266 Qlocal
= intern ("local");
6267 staticpro (&Qlocal
);
6268 Qdatagram
= intern ("datagram");
6269 staticpro (&Qdatagram
);
6271 QCname
= intern (":name");
6272 staticpro (&QCname
);
6273 QCbuffer
= intern (":buffer");
6274 staticpro (&QCbuffer
);
6275 QChost
= intern (":host");
6276 staticpro (&QChost
);
6277 QCservice
= intern (":service");
6278 staticpro (&QCservice
);
6279 QCtype
= intern (":type");
6280 staticpro (&QCtype
);
6281 QClocal
= intern (":local");
6282 staticpro (&QClocal
);
6283 QCremote
= intern (":remote");
6284 staticpro (&QCremote
);
6285 QCcoding
= intern (":coding");
6286 staticpro (&QCcoding
);
6287 QCserver
= intern (":server");
6288 staticpro (&QCserver
);
6289 QCnowait
= intern (":nowait");
6290 staticpro (&QCnowait
);
6291 QCsentinel
= intern (":sentinel");
6292 staticpro (&QCsentinel
);
6293 QClog
= intern (":log");
6295 QCnoquery
= intern (":noquery");
6296 staticpro (&QCnoquery
);
6297 QCstop
= intern (":stop");
6298 staticpro (&QCstop
);
6299 QCoptions
= intern (":options");
6300 staticpro (&QCoptions
);
6302 Qlast_nonmenu_event
= intern ("last-nonmenu-event");
6303 staticpro (&Qlast_nonmenu_event
);
6305 staticpro (&Vprocess_alist
);
6307 DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes
,
6308 doc
: /* *Non-nil means delete processes immediately when they exit.
6309 nil means don't delete them until `list-processes' is run. */);
6311 delete_exited_processes
= 1;
6313 DEFVAR_LISP ("process-connection-type", &Vprocess_connection_type
,
6314 doc
: /* Control type of device used to communicate with subprocesses.
6315 Values are nil to use a pipe, or t or `pty' to use a pty.
6316 The value has no effect if the system has no ptys or if all ptys are busy:
6317 then a pipe is used in any case.
6318 The value takes effect when `start-process' is called. */);
6319 Vprocess_connection_type
= Qt
;
6321 defsubr (&Sprocessp
);
6322 defsubr (&Sget_process
);
6323 defsubr (&Sget_buffer_process
);
6324 defsubr (&Sdelete_process
);
6325 defsubr (&Sprocess_status
);
6326 defsubr (&Sprocess_exit_status
);
6327 defsubr (&Sprocess_id
);
6328 defsubr (&Sprocess_name
);
6329 defsubr (&Sprocess_tty_name
);
6330 defsubr (&Sprocess_command
);
6331 defsubr (&Sset_process_buffer
);
6332 defsubr (&Sprocess_buffer
);
6333 defsubr (&Sprocess_mark
);
6334 defsubr (&Sset_process_filter
);
6335 defsubr (&Sprocess_filter
);
6336 defsubr (&Sset_process_sentinel
);
6337 defsubr (&Sprocess_sentinel
);
6338 defsubr (&Sset_process_window_size
);
6339 defsubr (&Sset_process_inherit_coding_system_flag
);
6340 defsubr (&Sprocess_inherit_coding_system_flag
);
6341 defsubr (&Sset_process_query_on_exit_flag
);
6342 defsubr (&Sprocess_query_on_exit_flag
);
6343 defsubr (&Sprocess_contact
);
6344 defsubr (&Slist_processes
);
6345 defsubr (&Sprocess_list
);
6346 defsubr (&Sstart_process
);
6348 defsubr (&Sset_network_process_options
);
6349 defsubr (&Smake_network_process
);
6350 defsubr (&Sformat_network_address
);
6351 #endif /* HAVE_SOCKETS */
6352 #ifdef DATAGRAM_SOCKETS
6353 defsubr (&Sprocess_datagram_address
);
6354 defsubr (&Sset_process_datagram_address
);
6356 defsubr (&Saccept_process_output
);
6357 defsubr (&Sprocess_send_region
);
6358 defsubr (&Sprocess_send_string
);
6359 defsubr (&Sinterrupt_process
);
6360 defsubr (&Skill_process
);
6361 defsubr (&Squit_process
);
6362 defsubr (&Sstop_process
);
6363 defsubr (&Scontinue_process
);
6364 defsubr (&Sprocess_running_child_p
);
6365 defsubr (&Sprocess_send_eof
);
6366 defsubr (&Ssignal_process
);
6367 defsubr (&Swaiting_for_user_input_p
);
6368 /* defsubr (&Sprocess_connection); */
6369 defsubr (&Sset_process_coding_system
);
6370 defsubr (&Sprocess_coding_system
);
6374 #else /* not subprocesses */
6376 #include <sys/types.h>
6380 #include "systime.h"
6381 #include "charset.h"
6383 #include "termopts.h"
6384 #include "sysselect.h"
6386 extern int frame_garbaged
;
6388 extern EMACS_TIME
timer_check ();
6389 extern int timers_run
;
6393 /* As described above, except assuming that there are no subprocesses:
6395 Wait for timeout to elapse and/or keyboard input to be available.
6398 timeout in seconds, or
6399 zero for no limit, or
6400 -1 means gobble data immediately available but don't wait for any.
6402 read_kbd is a Lisp_Object:
6403 0 to ignore keyboard input, or
6404 1 to return when input is available, or
6405 -1 means caller will actually read the input, so don't throw to
6407 a cons cell, meaning wait until its car is non-nil
6408 (and gobble terminal input into the buffer if any arrives), or
6409 We know that read_kbd will never be a Lisp_Process, since
6410 `subprocesses' isn't defined.
6412 do_display != 0 means redisplay should be done to show subprocess
6413 output that arrives.
6415 Return true iff we received input from any process. */
6418 wait_reading_process_input (time_limit
, microsecs
, read_kbd
, do_display
)
6419 int time_limit
, microsecs
;
6420 Lisp_Object read_kbd
;
6424 EMACS_TIME end_time
, timeout
;
6425 SELECT_TYPE waitchannels
;
6427 /* Either nil or a cons cell, the car of which is of interest and
6428 may be changed outside of this routine. */
6429 Lisp_Object wait_for_cell
;
6431 wait_for_cell
= Qnil
;
6433 /* If waiting for non-nil in a cell, record where. */
6434 if (CONSP (read_kbd
))
6436 wait_for_cell
= read_kbd
;
6437 XSETFASTINT (read_kbd
, 0);
6440 /* What does time_limit really mean? */
6441 if (time_limit
|| microsecs
)
6443 EMACS_GET_TIME (end_time
);
6444 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
6445 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6448 /* Turn off periodic alarms (in case they are in use)
6449 and then turn off any other atimers,
6450 because the select emulator uses alarms. */
6452 turn_on_atimers (0);
6456 int timeout_reduced_for_timers
= 0;
6458 /* If calling from keyboard input, do not quit
6459 since we want to return C-g as an input character.
6460 Otherwise, do pending quit if requested. */
6461 if (XINT (read_kbd
) >= 0)
6464 /* Exit now if the cell we're waiting for became non-nil. */
6465 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6468 /* Compute time from now till when time limit is up */
6469 /* Exit if already run out */
6470 if (time_limit
== -1)
6472 /* -1 specified for timeout means
6473 gobble output available now
6474 but don't wait at all. */
6476 EMACS_SET_SECS_USECS (timeout
, 0, 0);
6478 else if (time_limit
|| microsecs
)
6480 EMACS_GET_TIME (timeout
);
6481 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6482 if (EMACS_TIME_NEG_P (timeout
))
6487 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
6490 /* If our caller will not immediately handle keyboard events,
6491 run timer events directly.
6492 (Callers that will immediately read keyboard events
6493 call timer_delay on their own.) */
6494 if (NILP (wait_for_cell
))
6496 EMACS_TIME timer_delay
;
6500 int old_timers_run
= timers_run
;
6501 timer_delay
= timer_check (1);
6502 if (timers_run
!= old_timers_run
&& do_display
)
6503 /* We must retry, since a timer may have requeued itself
6504 and that could alter the time delay. */
6505 redisplay_preserve_echo_area (14);
6509 while (!detect_input_pending ());
6511 /* If there is unread keyboard input, also return. */
6512 if (XINT (read_kbd
) != 0
6513 && requeued_events_pending_p ())
6516 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
6518 EMACS_TIME difference
;
6519 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
6520 if (EMACS_TIME_NEG_P (difference
))
6522 timeout
= timer_delay
;
6523 timeout_reduced_for_timers
= 1;
6528 /* Cause C-g and alarm signals to take immediate action,
6529 and cause input available signals to zero out timeout. */
6530 if (XINT (read_kbd
) < 0)
6531 set_waiting_for_input (&timeout
);
6533 /* Wait till there is something to do. */
6535 if (! XINT (read_kbd
) && NILP (wait_for_cell
))
6536 FD_ZERO (&waitchannels
);
6538 FD_SET (0, &waitchannels
);
6540 /* If a frame has been newly mapped and needs updating,
6541 reprocess its display stuff. */
6542 if (frame_garbaged
&& do_display
)
6544 clear_waiting_for_input ();
6545 redisplay_preserve_echo_area (15);
6546 if (XINT (read_kbd
) < 0)
6547 set_waiting_for_input (&timeout
);
6550 if (XINT (read_kbd
) && detect_input_pending ())
6553 FD_ZERO (&waitchannels
);
6556 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
6561 /* Make C-g and alarm signals set flags again */
6562 clear_waiting_for_input ();
6564 /* If we woke up due to SIGWINCH, actually change size now. */
6565 do_pending_window_change (0);
6567 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
6568 /* We waited the full specified time, so return now. */
6573 /* If the system call was interrupted, then go around the
6575 if (xerrno
== EINTR
)
6576 FD_ZERO (&waitchannels
);
6578 error ("select error: %s", emacs_strerror (xerrno
));
6581 else if (nfds
> 0 && (waitchannels
& 1) && interrupt_input
)
6582 /* System sometimes fails to deliver SIGIO. */
6583 kill (getpid (), SIGIO
);
6586 if (XINT (read_kbd
) && interrupt_input
&& (waitchannels
& 1))
6587 kill (getpid (), SIGIO
);
6590 /* Check for keyboard input */
6592 if ((XINT (read_kbd
) != 0)
6593 && detect_input_pending_run_timers (do_display
))
6595 swallow_events (do_display
);
6596 if (detect_input_pending_run_timers (do_display
))
6600 /* If there is unread keyboard input, also return. */
6601 if (XINT (read_kbd
) != 0
6602 && requeued_events_pending_p ())
6605 /* If wait_for_cell. check for keyboard input
6606 but don't run any timers.
6607 ??? (It seems wrong to me to check for keyboard
6608 input at all when wait_for_cell, but the code
6609 has been this way since July 1994.
6610 Try changing this after version 19.31.) */
6611 if (! NILP (wait_for_cell
)
6612 && detect_input_pending ())
6614 swallow_events (do_display
);
6615 if (detect_input_pending ())
6619 /* Exit now if the cell we're waiting for became non-nil. */
6620 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6630 /* Don't confuse make-docfile by having two doc strings for this function.
6631 make-docfile does not pay attention to #if, for good reason! */
6632 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
6635 register Lisp_Object name
;
6640 /* Don't confuse make-docfile by having two doc strings for this function.
6641 make-docfile does not pay attention to #if, for good reason! */
6642 DEFUN ("process-inherit-coding-system-flag",
6643 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
6647 register Lisp_Object process
;
6649 /* Ignore the argument and return the value of
6650 inherit-process-coding-system. */
6651 return inherit_process_coding_system
? Qt
: Qnil
;
6654 /* Kill all processes associated with `buffer'.
6655 If `buffer' is nil, kill all processes.
6656 Since we have no subprocesses, this does nothing. */
6659 kill_buffer_processes (buffer
)
6672 QCtype
= intern (":type");
6673 staticpro (&QCtype
);
6675 defsubr (&Sget_buffer_process
);
6676 defsubr (&Sprocess_inherit_coding_system_flag
);
6680 #endif /* not subprocesses */