1 /* Asynchronous subprocess control for GNU Emacs.
3 Copyright (C) 1985-1988, 1993-1996, 1998-1999, 2001-2011
4 Free Software Foundation, Inc.
6 This file is part of GNU Emacs.
8 GNU Emacs is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
13 GNU Emacs is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
27 #include <sys/types.h> /* Some typedefs are used in sys/file.h. */
37 /* Only MS-DOS does not define `subprocesses'. */
40 #include <sys/socket.h>
42 #include <netinet/in.h>
43 #include <arpa/inet.h>
45 /* Are local (unix) sockets supported? */
46 #if defined (HAVE_SYS_UN_H)
47 #if !defined (AF_LOCAL) && defined (AF_UNIX)
48 #define AF_LOCAL AF_UNIX
51 #define HAVE_LOCAL_SOCKETS
56 #include <sys/ioctl.h>
57 #if defined(HAVE_NET_IF_H)
59 #endif /* HAVE_NET_IF_H */
61 #if defined(HAVE_IFADDRS_H)
62 /* Must be after net/if.h */
65 /* We only use structs from this header when we use getifaddrs. */
66 #if defined(HAVE_NET_IF_DL_H)
67 #include <net/if_dl.h>
77 #include <netinet/in.h>
78 #include <arpa/nameser.h>
90 #endif /* subprocesses */
97 #include "character.h"
101 #include "termhooks.h"
102 #include "termopts.h"
103 #include "commands.h"
104 #include "keyboard.h"
105 #include "blockinput.h"
106 #include "dispextern.h"
107 #include "composite.h"
109 #include "sysselect.h"
110 #include "syssignal.h"
116 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
117 #include "xgselect.h"
123 Lisp_Object Qeuid
, Qegid
, Qcomm
, Qstate
, Qppid
, Qpgrp
, Qsess
, Qttname
, Qtpgid
;
124 Lisp_Object Qminflt
, Qmajflt
, Qcminflt
, Qcmajflt
, Qutime
, Qstime
, Qcstime
;
125 Lisp_Object Qcutime
, Qpri
, Qnice
, Qthcount
, Qstart
, Qvsize
, Qrss
, Qargs
;
126 Lisp_Object Quser
, Qgroup
, Qetime
, Qpcpu
, Qpmem
, Qtime
, Qctime
;
127 Lisp_Object QCname
, QCtype
;
129 /* Non-zero if keyboard input is on hold, zero otherwise. */
131 static int kbd_is_on_hold
;
133 /* Nonzero means don't run process sentinels. This is used
135 int inhibit_sentinels
;
139 Lisp_Object Qprocessp
;
140 static Lisp_Object Qrun
, Qstop
, Qsignal
;
141 static Lisp_Object Qopen
, Qclosed
, Qconnect
, Qfailed
, Qlisten
;
143 static Lisp_Object Qipv4
, Qdatagram
, Qseqpacket
;
144 static Lisp_Object Qreal
, Qnetwork
, Qserial
;
146 static Lisp_Object Qipv6
;
148 static Lisp_Object QCport
, QCprocess
;
150 Lisp_Object QCbytesize
, QCstopbits
, QCparity
, Qodd
, Qeven
;
151 Lisp_Object QCflowcontrol
, Qhw
, Qsw
, QCsummary
;
152 static Lisp_Object QCbuffer
, QChost
, QCservice
;
153 static Lisp_Object QClocal
, QCremote
, QCcoding
;
154 static Lisp_Object QCserver
, QCnowait
, QCnoquery
, QCstop
;
155 static Lisp_Object QCsentinel
, QClog
, QCoptions
, QCplist
;
156 static Lisp_Object Qlast_nonmenu_event
;
157 /* QCfamily is declared and initialized in xfaces.c,
158 QCfilter in keyboard.c. */
159 extern Lisp_Object QCfamily
, QCfilter
;
161 /* Qexit is declared and initialized in eval.c. */
163 /* QCfamily is defined in xfaces.c. */
164 extern Lisp_Object QCfamily
;
165 /* QCfilter is defined in keyboard.c. */
166 extern Lisp_Object QCfilter
;
168 #define NETCONN_P(p) (EQ (XPROCESS (p)->type, Qnetwork))
169 #define NETCONN1_P(p) (EQ ((p)->type, Qnetwork))
170 #define SERIALCONN_P(p) (EQ (XPROCESS (p)->type, Qserial))
171 #define SERIALCONN1_P(p) (EQ ((p)->type, Qserial))
177 /* Number of events of change of status of a process. */
178 static int process_tick
;
179 /* Number of events for which the user or sentinel has been notified. */
180 static int update_tick
;
182 /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */
184 /* Only W32 has this, it really means that select can't take write mask. */
185 #ifdef BROKEN_NON_BLOCKING_CONNECT
186 #undef NON_BLOCKING_CONNECT
187 #define SELECT_CANT_DO_WRITE_MASK
189 #ifndef NON_BLOCKING_CONNECT
191 #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX)
192 #if defined (O_NONBLOCK) || defined (O_NDELAY)
193 #if defined (EWOULDBLOCK) || defined (EINPROGRESS)
194 #define NON_BLOCKING_CONNECT
195 #endif /* EWOULDBLOCK || EINPROGRESS */
196 #endif /* O_NONBLOCK || O_NDELAY */
197 #endif /* HAVE_GETPEERNAME || GNU_LINUX */
198 #endif /* HAVE_SELECT */
199 #endif /* NON_BLOCKING_CONNECT */
200 #endif /* BROKEN_NON_BLOCKING_CONNECT */
202 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
203 this system. We need to read full packets, so we need a
204 "non-destructive" select. So we require either native select,
205 or emulation of select using FIONREAD. */
207 #ifdef BROKEN_DATAGRAM_SOCKETS
208 #undef DATAGRAM_SOCKETS
210 #ifndef DATAGRAM_SOCKETS
211 #if defined (HAVE_SELECT) || defined (FIONREAD)
212 #if defined (HAVE_SENDTO) && defined (HAVE_RECVFROM) && defined (EMSGSIZE)
213 #define DATAGRAM_SOCKETS
214 #endif /* HAVE_SENDTO && HAVE_RECVFROM && EMSGSIZE */
215 #endif /* HAVE_SELECT || FIONREAD */
216 #endif /* DATAGRAM_SOCKETS */
217 #endif /* BROKEN_DATAGRAM_SOCKETS */
219 #if defined HAVE_LOCAL_SOCKETS && defined DATAGRAM_SOCKETS
220 # define HAVE_SEQPACKET
223 #if !defined (ADAPTIVE_READ_BUFFERING) && !defined (NO_ADAPTIVE_READ_BUFFERING)
224 #ifdef EMACS_HAS_USECS
225 #define ADAPTIVE_READ_BUFFERING
229 #ifdef ADAPTIVE_READ_BUFFERING
230 #define READ_OUTPUT_DELAY_INCREMENT 10000
231 #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5)
232 #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7)
234 /* Number of processes which have a non-zero read_output_delay,
235 and therefore might be delayed for adaptive read buffering. */
237 static int process_output_delay_count
;
239 /* Non-zero if any process has non-nil read_output_skip. */
241 static int process_output_skip
;
244 #define process_output_delay_count 0
247 static Lisp_Object
Fget_process (Lisp_Object
);
248 static void create_process (Lisp_Object
, char **, Lisp_Object
);
250 static int keyboard_bit_set (SELECT_TYPE
*);
252 static void deactivate_process (Lisp_Object
);
253 static void status_notify (struct Lisp_Process
*);
254 static int read_process_output (Lisp_Object
, int);
255 static void create_pty (Lisp_Object
);
257 /* If we support a window system, turn on the code to poll periodically
258 to detect C-g. It isn't actually used when doing interrupt input. */
259 #if defined(HAVE_WINDOW_SYSTEM) && !defined(USE_ASYNC_EVENTS)
260 #define POLL_FOR_INPUT
263 static Lisp_Object
get_process (register Lisp_Object name
);
264 static void exec_sentinel (Lisp_Object proc
, Lisp_Object reason
);
266 /* Mask of bits indicating the descriptors that we wait for input on. */
268 static SELECT_TYPE input_wait_mask
;
270 /* Mask that excludes keyboard input descriptor(s). */
272 static SELECT_TYPE non_keyboard_wait_mask
;
274 /* Mask that excludes process input descriptor(s). */
276 static SELECT_TYPE non_process_wait_mask
;
278 /* Mask for selecting for write. */
280 static SELECT_TYPE write_mask
;
282 #ifdef NON_BLOCKING_CONNECT
283 /* Mask of bits indicating the descriptors that we wait for connect to
284 complete on. Once they complete, they are removed from this mask
285 and added to the input_wait_mask and non_keyboard_wait_mask. */
287 static SELECT_TYPE connect_wait_mask
;
289 /* Number of bits set in connect_wait_mask. */
290 static int num_pending_connects
;
291 #endif /* NON_BLOCKING_CONNECT */
293 /* The largest descriptor currently in use for a process object. */
294 static int max_process_desc
;
296 /* The largest descriptor currently in use for input. */
297 static int max_input_desc
;
299 /* Indexed by descriptor, gives the process (if any) for that descriptor */
300 static Lisp_Object chan_process
[MAXDESC
];
302 /* Alist of elements (NAME . PROCESS) */
303 static Lisp_Object Vprocess_alist
;
305 /* Buffered-ahead input char from process, indexed by channel.
306 -1 means empty (no char is buffered).
307 Used on sys V where the only way to tell if there is any
308 output from the process is to read at least one char.
309 Always -1 on systems that support FIONREAD. */
311 static int proc_buffered_char
[MAXDESC
];
313 /* Table of `struct coding-system' for each process. */
314 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
315 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
317 #ifdef DATAGRAM_SOCKETS
318 /* Table of `partner address' for datagram sockets. */
319 static struct sockaddr_and_len
{
322 } datagram_address
[MAXDESC
];
323 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
324 #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XPROCESS (proc)->infd].sa != 0)
326 #define DATAGRAM_CHAN_P(chan) (0)
327 #define DATAGRAM_CONN_P(proc) (0)
330 /* Maximum number of bytes to send to a pty without an eof. */
331 static int pty_max_bytes
;
335 static struct fd_callback_data
341 int condition
; /* mask of the defines above. */
342 } fd_callback_info
[MAXDESC
];
345 /* Add a file descriptor FD to be monitored for when read is possible.
346 When read is possible, call FUNC with argument DATA. */
349 add_read_fd (int fd
, fd_callback func
, void *data
)
351 xassert (fd
< MAXDESC
);
352 add_keyboard_wait_descriptor (fd
);
354 fd_callback_info
[fd
].func
= func
;
355 fd_callback_info
[fd
].data
= data
;
356 fd_callback_info
[fd
].condition
|= FOR_READ
;
359 /* Stop monitoring file descriptor FD for when read is possible. */
362 delete_read_fd (int fd
)
364 xassert (fd
< MAXDESC
);
365 delete_keyboard_wait_descriptor (fd
);
367 fd_callback_info
[fd
].condition
&= ~FOR_READ
;
368 if (fd_callback_info
[fd
].condition
== 0)
370 fd_callback_info
[fd
].func
= 0;
371 fd_callback_info
[fd
].data
= 0;
375 /* Add a file descriptor FD to be monitored for when write is possible.
376 When write is possible, call FUNC with argument DATA. */
379 add_write_fd (int fd
, fd_callback func
, void *data
)
381 xassert (fd
< MAXDESC
);
382 FD_SET (fd
, &write_mask
);
383 if (fd
> max_input_desc
)
386 fd_callback_info
[fd
].func
= func
;
387 fd_callback_info
[fd
].data
= data
;
388 fd_callback_info
[fd
].condition
|= FOR_WRITE
;
391 /* Stop monitoring file descriptor FD for when write is possible. */
394 delete_write_fd (int fd
)
396 int lim
= max_input_desc
;
398 xassert (fd
< MAXDESC
);
399 FD_CLR (fd
, &write_mask
);
400 fd_callback_info
[fd
].condition
&= ~FOR_WRITE
;
401 if (fd_callback_info
[fd
].condition
== 0)
403 fd_callback_info
[fd
].func
= 0;
404 fd_callback_info
[fd
].data
= 0;
406 if (fd
== max_input_desc
)
407 for (fd
= lim
; fd
>= 0; fd
--)
408 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
418 /* Compute the Lisp form of the process status, p->status, from
419 the numeric status that was returned by `wait'. */
421 static Lisp_Object
status_convert (int);
424 update_status (struct Lisp_Process
*p
)
426 eassert (p
->raw_status_new
);
427 p
->status
= status_convert (p
->raw_status
);
428 p
->raw_status_new
= 0;
431 /* Convert a process status word in Unix format to
432 the list that we use internally. */
435 status_convert (int w
)
438 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
439 else if (WIFEXITED (w
))
440 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
441 WCOREDUMP (w
) ? Qt
: Qnil
));
442 else if (WIFSIGNALED (w
))
443 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
444 WCOREDUMP (w
) ? Qt
: Qnil
));
449 /* Given a status-list, extract the three pieces of information
450 and store them individually through the three pointers. */
453 decode_status (Lisp_Object l
, Lisp_Object
*symbol
, int *code
, int *coredump
)
467 *code
= XFASTINT (XCAR (tem
));
469 *coredump
= !NILP (tem
);
473 /* Return a string describing a process status list. */
476 status_message (struct Lisp_Process
*p
)
478 Lisp_Object status
= p
->status
;
481 Lisp_Object string
, string2
;
483 decode_status (status
, &symbol
, &code
, &coredump
);
485 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
488 synchronize_system_messages_locale ();
489 signame
= strsignal (code
);
491 string
= build_string ("unknown");
496 string
= make_unibyte_string (signame
, strlen (signame
));
497 if (! NILP (Vlocale_coding_system
))
498 string
= (code_convert_string_norecord
499 (string
, Vlocale_coding_system
, 0));
500 c1
= STRING_CHAR (SDATA (string
));
503 Faset (string
, make_number (0), make_number (c2
));
505 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
506 return concat2 (string
, string2
);
508 else if (EQ (symbol
, Qexit
))
511 return build_string (code
== 0 ? "deleted\n" : "connection broken by remote peer\n");
513 return build_string ("finished\n");
514 string
= Fnumber_to_string (make_number (code
));
515 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
516 return concat3 (build_string ("exited abnormally with code "),
519 else if (EQ (symbol
, Qfailed
))
521 string
= Fnumber_to_string (make_number (code
));
522 string2
= build_string ("\n");
523 return concat3 (build_string ("failed with code "),
527 return Fcopy_sequence (Fsymbol_name (symbol
));
532 /* The file name of the pty opened by allocate_pty. */
533 static char pty_name
[24];
535 /* Open an available pty, returning a file descriptor.
536 Return -1 on failure.
537 The file name of the terminal corresponding to the pty
538 is left in the variable pty_name. */
549 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
550 for (i
= 0; i
< 16; i
++)
553 #ifdef PTY_NAME_SPRINTF
556 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
557 #endif /* no PTY_NAME_SPRINTF */
561 #else /* no PTY_OPEN */
563 { /* Some systems name their pseudoterminals so that there are gaps in
564 the usual sequence - for example, on HP9000/S700 systems, there
565 are no pseudoterminals with names ending in 'f'. So we wait for
566 three failures in a row before deciding that we've reached the
568 int failed_count
= 0;
571 if (stat (pty_name
, &stb
) < 0)
574 if (failed_count
>= 3)
581 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
583 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
586 #endif /* no PTY_OPEN */
590 /* check to make certain that both sides are available
591 this avoids a nasty yet stupid bug in rlogins */
592 #ifdef PTY_TTY_NAME_SPRINTF
595 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
596 #endif /* no PTY_TTY_NAME_SPRINTF */
597 if (access (pty_name
, 6) != 0)
612 #endif /* HAVE_PTYS */
615 make_process (Lisp_Object name
)
617 register Lisp_Object val
, tem
, name1
;
618 register struct Lisp_Process
*p
;
622 p
= allocate_process ();
630 p
->raw_status_new
= 0;
632 p
->mark
= Fmake_marker ();
633 p
->kill_without_query
= 0;
635 #ifdef ADAPTIVE_READ_BUFFERING
636 p
->adaptive_read_buffering
= 0;
637 p
->read_output_delay
= 0;
638 p
->read_output_skip
= 0;
642 p
->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
643 p
->gnutls_log_level
= 0;
647 /* If name is already in use, modify it until it is unused. */
652 tem
= Fget_process (name1
);
653 if (NILP (tem
)) break;
654 sprintf (suffix
, "<%d>", i
);
655 name1
= concat2 (name
, build_string (suffix
));
659 XSETPROCESS (val
, p
);
660 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
665 remove_process (register Lisp_Object proc
)
667 register Lisp_Object pair
;
669 pair
= Frassq (proc
, Vprocess_alist
);
670 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
672 deactivate_process (proc
);
676 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
677 doc
: /* Return t if OBJECT is a process. */)
680 return PROCESSP (object
) ? Qt
: Qnil
;
683 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
684 doc
: /* Return the process named NAME, or nil if there is none. */)
685 (register Lisp_Object name
)
690 return Fcdr (Fassoc (name
, Vprocess_alist
));
693 /* This is how commands for the user decode process arguments. It
694 accepts a process, a process name, a buffer, a buffer name, or nil.
695 Buffers denote the first process in the buffer, and nil denotes the
699 get_process (register Lisp_Object name
)
701 register Lisp_Object proc
, obj
;
704 obj
= Fget_process (name
);
706 obj
= Fget_buffer (name
);
708 error ("Process %s does not exist", SDATA (name
));
710 else if (NILP (name
))
711 obj
= Fcurrent_buffer ();
715 /* Now obj should be either a buffer object or a process object.
719 proc
= Fget_buffer_process (obj
);
721 error ("Buffer %s has no process", SDATA (BVAR (XBUFFER (obj
), name
)));
733 /* Fdelete_process promises to immediately forget about the process, but in
734 reality, Emacs needs to remember those processes until they have been
735 treated by sigchld_handler; otherwise this handler would consider the
736 process as being synchronous and say that the synchronous process is
738 static Lisp_Object deleted_pid_list
;
741 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
742 doc
: /* Delete PROCESS: kill it and forget about it immediately.
743 PROCESS may be a process, a buffer, the name of a process or buffer, or
744 nil, indicating the current buffer's process. */)
745 (register Lisp_Object process
)
747 register struct Lisp_Process
*p
;
749 process
= get_process (process
);
750 p
= XPROCESS (process
);
752 p
->raw_status_new
= 0;
753 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
755 p
->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
756 p
->tick
= ++process_tick
;
758 redisplay_preserve_echo_area (13);
760 else if (p
->infd
>= 0)
764 /* Assignment to EMACS_INT stops GCC whining about limited range
766 EMACS_INT pid
= p
->pid
;
768 /* No problem storing the pid here, as it is still in Vprocess_alist. */
769 deleted_pid_list
= Fcons (make_fixnum_or_float (pid
),
770 /* GC treated elements set to nil. */
771 Fdelq (Qnil
, deleted_pid_list
));
772 /* If the process has already signaled, remove it from the list. */
773 if (p
->raw_status_new
)
776 if (CONSP (p
->status
))
777 symbol
= XCAR (p
->status
);
778 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
780 = Fdelete (make_fixnum_or_float (pid
), deleted_pid_list
);
784 Fkill_process (process
, Qnil
);
785 /* Do this now, since remove_process will make sigchld_handler do nothing. */
787 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
788 p
->tick
= ++process_tick
;
790 redisplay_preserve_echo_area (13);
793 remove_process (process
);
797 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
798 doc
: /* Return the status of PROCESS.
799 The returned value is one of the following symbols:
800 run -- for a process that is running.
801 stop -- for a process stopped but continuable.
802 exit -- for a process that has exited.
803 signal -- for a process that has got a fatal signal.
804 open -- for a network stream connection that is open.
805 listen -- for a network stream server that is listening.
806 closed -- for a network stream connection that is closed.
807 connect -- when waiting for a non-blocking connection to complete.
808 failed -- when a non-blocking connection has failed.
809 nil -- if arg is a process name and no such process exists.
810 PROCESS may be a process, a buffer, the name of a process, or
811 nil, indicating the current buffer's process. */)
812 (register Lisp_Object process
)
814 register struct Lisp_Process
*p
;
815 register Lisp_Object status
;
817 if (STRINGP (process
))
818 process
= Fget_process (process
);
820 process
= get_process (process
);
825 p
= XPROCESS (process
);
826 if (p
->raw_status_new
)
830 status
= XCAR (status
);
831 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
833 if (EQ (status
, Qexit
))
835 else if (EQ (p
->command
, Qt
))
837 else if (EQ (status
, Qrun
))
843 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
845 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
846 If PROCESS has not yet exited or died, return 0. */)
847 (register Lisp_Object process
)
849 CHECK_PROCESS (process
);
850 if (XPROCESS (process
)->raw_status_new
)
851 update_status (XPROCESS (process
));
852 if (CONSP (XPROCESS (process
)->status
))
853 return XCAR (XCDR (XPROCESS (process
)->status
));
854 return make_number (0);
857 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
858 doc
: /* Return the process id of PROCESS.
859 This is the pid of the external process which PROCESS uses or talks to.
860 For a network connection, this value is nil. */)
861 (register Lisp_Object process
)
863 /* Assignment to EMACS_INT stops GCC whining about limited range of
867 CHECK_PROCESS (process
);
868 pid
= XPROCESS (process
)->pid
;
869 return (pid
? make_fixnum_or_float (pid
) : Qnil
);
872 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
873 doc
: /* Return the name of PROCESS, as a string.
874 This is the name of the program invoked in PROCESS,
875 possibly modified to make it unique among process names. */)
876 (register Lisp_Object process
)
878 CHECK_PROCESS (process
);
879 return XPROCESS (process
)->name
;
882 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
883 doc
: /* Return the command that was executed to start PROCESS.
884 This is a list of strings, the first string being the program executed
885 and the rest of the strings being the arguments given to it.
886 For a network or serial process, this is nil (process is running) or t
887 \(process is stopped). */)
888 (register Lisp_Object process
)
890 CHECK_PROCESS (process
);
891 return XPROCESS (process
)->command
;
894 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
895 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
896 This is the terminal that the process itself reads and writes on,
897 not the name of the pty that Emacs uses to talk with that terminal. */)
898 (register Lisp_Object process
)
900 CHECK_PROCESS (process
);
901 return XPROCESS (process
)->tty_name
;
904 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
906 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil).
908 (register Lisp_Object process
, Lisp_Object buffer
)
910 struct Lisp_Process
*p
;
912 CHECK_PROCESS (process
);
914 CHECK_BUFFER (buffer
);
915 p
= XPROCESS (process
);
917 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
918 p
->childp
= Fplist_put (p
->childp
, QCbuffer
, buffer
);
919 setup_process_coding_systems (process
);
923 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
925 doc
: /* Return the buffer PROCESS is associated with.
926 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
927 (register Lisp_Object process
)
929 CHECK_PROCESS (process
);
930 return XPROCESS (process
)->buffer
;
933 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
935 doc
: /* Return the marker for the end of the last output from PROCESS. */)
936 (register Lisp_Object process
)
938 CHECK_PROCESS (process
);
939 return XPROCESS (process
)->mark
;
942 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
944 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
945 A value of t means stop accepting output from the process.
947 When a process has a filter, its buffer is not used for output.
948 Instead, each time it does output, the entire string of output is
949 passed to the filter.
951 The filter gets two arguments: the process and the string of output.
952 The string argument is normally a multibyte string, except:
953 - if the process' input coding system is no-conversion or raw-text,
954 it is a unibyte string (the non-converted input), or else
955 - if `default-enable-multibyte-characters' is nil, it is a unibyte
956 string (the result of converting the decoded input multibyte
957 string to unibyte with `string-make-unibyte'). */)
958 (register Lisp_Object process
, Lisp_Object filter
)
960 struct Lisp_Process
*p
;
962 CHECK_PROCESS (process
);
963 p
= XPROCESS (process
);
965 /* Don't signal an error if the process' input file descriptor
966 is closed. This could make debugging Lisp more difficult,
967 for example when doing something like
969 (setq process (start-process ...))
971 (set-process-filter process ...) */
975 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
977 FD_CLR (p
->infd
, &input_wait_mask
);
978 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
980 else if (EQ (p
->filter
, Qt
)
981 /* Network or serial process not stopped: */
982 && !EQ (p
->command
, Qt
))
984 FD_SET (p
->infd
, &input_wait_mask
);
985 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
990 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
991 p
->childp
= Fplist_put (p
->childp
, QCfilter
, filter
);
992 setup_process_coding_systems (process
);
996 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
998 doc
: /* Returns the filter function of PROCESS; nil if none.
999 See `set-process-filter' for more info on filter functions. */)
1000 (register Lisp_Object process
)
1002 CHECK_PROCESS (process
);
1003 return XPROCESS (process
)->filter
;
1006 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
1008 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
1009 The sentinel is called as a function when the process changes state.
1010 It gets two arguments: the process, and a string describing the change. */)
1011 (register Lisp_Object process
, Lisp_Object sentinel
)
1013 struct Lisp_Process
*p
;
1015 CHECK_PROCESS (process
);
1016 p
= XPROCESS (process
);
1018 p
->sentinel
= sentinel
;
1019 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1020 p
->childp
= Fplist_put (p
->childp
, QCsentinel
, sentinel
);
1024 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1026 doc
: /* Return the sentinel of PROCESS; nil if none.
1027 See `set-process-sentinel' for more info on sentinels. */)
1028 (register Lisp_Object process
)
1030 CHECK_PROCESS (process
);
1031 return XPROCESS (process
)->sentinel
;
1034 DEFUN ("set-process-window-size", Fset_process_window_size
,
1035 Sset_process_window_size
, 3, 3, 0,
1036 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1037 (register Lisp_Object process
, Lisp_Object height
, Lisp_Object width
)
1039 CHECK_PROCESS (process
);
1040 CHECK_NATNUM (height
);
1041 CHECK_NATNUM (width
);
1043 if (XPROCESS (process
)->infd
< 0
1044 || set_window_size (XPROCESS (process
)->infd
,
1045 XINT (height
), XINT (width
)) <= 0)
1051 DEFUN ("set-process-inherit-coding-system-flag",
1052 Fset_process_inherit_coding_system_flag
,
1053 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1054 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1055 If the second argument FLAG is non-nil, then the variable
1056 `buffer-file-coding-system' of the buffer associated with PROCESS
1057 will be bound to the value of the coding system used to decode
1060 This is useful when the coding system specified for the process buffer
1061 leaves either the character code conversion or the end-of-line conversion
1062 unspecified, or if the coding system used to decode the process output
1063 is more appropriate for saving the process buffer.
1065 Binding the variable `inherit-process-coding-system' to non-nil before
1066 starting the process is an alternative way of setting the inherit flag
1067 for the process which will run. */)
1068 (register Lisp_Object process
, Lisp_Object flag
)
1070 CHECK_PROCESS (process
);
1071 XPROCESS (process
)->inherit_coding_system_flag
= !NILP (flag
);
1075 DEFUN ("set-process-query-on-exit-flag",
1076 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1078 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1079 If the second argument FLAG is non-nil, Emacs will query the user before
1080 exiting or killing a buffer if PROCESS is running. */)
1081 (register Lisp_Object process
, Lisp_Object flag
)
1083 CHECK_PROCESS (process
);
1084 XPROCESS (process
)->kill_without_query
= NILP (flag
);
1088 DEFUN ("process-query-on-exit-flag",
1089 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1091 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1092 (register Lisp_Object process
)
1094 CHECK_PROCESS (process
);
1095 return (XPROCESS (process
)->kill_without_query
? Qnil
: Qt
);
1098 #ifdef DATAGRAM_SOCKETS
1099 static Lisp_Object
Fprocess_datagram_address (Lisp_Object
);
1102 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1104 doc
: /* Return the contact info of PROCESS; t for a real child.
1105 For a network or serial connection, the value depends on the optional
1106 KEY arg. If KEY is nil, value is a cons cell of the form (HOST
1107 SERVICE) for a network connection or (PORT SPEED) for a serial
1108 connection. If KEY is t, the complete contact information for the
1109 connection is returned, else the specific value for the keyword KEY is
1110 returned. See `make-network-process' or `make-serial-process' for a
1111 list of keywords. */)
1112 (register Lisp_Object process
, Lisp_Object key
)
1114 Lisp_Object contact
;
1116 CHECK_PROCESS (process
);
1117 contact
= XPROCESS (process
)->childp
;
1119 #ifdef DATAGRAM_SOCKETS
1120 if (DATAGRAM_CONN_P (process
)
1121 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1122 contact
= Fplist_put (contact
, QCremote
,
1123 Fprocess_datagram_address (process
));
1126 if ((!NETCONN_P (process
) && !SERIALCONN_P (process
)) || EQ (key
, Qt
))
1128 if (NILP (key
) && NETCONN_P (process
))
1129 return Fcons (Fplist_get (contact
, QChost
),
1130 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1131 if (NILP (key
) && SERIALCONN_P (process
))
1132 return Fcons (Fplist_get (contact
, QCport
),
1133 Fcons (Fplist_get (contact
, QCspeed
), Qnil
));
1134 return Fplist_get (contact
, key
);
1137 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1139 doc
: /* Return the plist of PROCESS. */)
1140 (register Lisp_Object process
)
1142 CHECK_PROCESS (process
);
1143 return XPROCESS (process
)->plist
;
1146 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1148 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1149 (register Lisp_Object process
, Lisp_Object plist
)
1151 CHECK_PROCESS (process
);
1154 XPROCESS (process
)->plist
= plist
;
1158 #if 0 /* Turned off because we don't currently record this info
1159 in the process. Perhaps add it. */
1160 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1161 doc
: /* Return the connection type of PROCESS.
1162 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1163 a socket connection. */)
1164 (Lisp_Object process
)
1166 return XPROCESS (process
)->type
;
1170 DEFUN ("process-type", Fprocess_type
, Sprocess_type
, 1, 1, 0,
1171 doc
: /* Return the connection type of PROCESS.
1172 The value is either the symbol `real', `network', or `serial'.
1173 PROCESS may be a process, a buffer, the name of a process or buffer, or
1174 nil, indicating the current buffer's process. */)
1175 (Lisp_Object process
)
1178 proc
= get_process (process
);
1179 return XPROCESS (proc
)->type
;
1182 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1184 doc
: /* Convert network ADDRESS from internal format to a string.
1185 A 4 or 5 element vector represents an IPv4 address (with port number).
1186 An 8 or 9 element vector represents an IPv6 address (with port number).
1187 If optional second argument OMIT-PORT is non-nil, don't include a port
1188 number in the string, even when present in ADDRESS.
1189 Returns nil if format of ADDRESS is invalid. */)
1190 (Lisp_Object address
, Lisp_Object omit_port
)
1195 if (STRINGP (address
)) /* AF_LOCAL */
1198 if (VECTORP (address
)) /* AF_INET or AF_INET6 */
1200 register struct Lisp_Vector
*p
= XVECTOR (address
);
1201 EMACS_INT size
= p
->header
.size
;
1202 Lisp_Object args
[10];
1205 if (size
== 4 || (size
== 5 && !NILP (omit_port
)))
1207 args
[0] = build_string ("%d.%d.%d.%d");
1212 args
[0] = build_string ("%d.%d.%d.%d:%d");
1215 else if (size
== 8 || (size
== 9 && !NILP (omit_port
)))
1217 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
1222 args
[0] = build_string ("[%x:%x:%x:%x:%x:%x:%x:%x]:%d");
1228 for (i
= 0; i
< nargs
; i
++)
1230 EMACS_INT element
= XINT (p
->contents
[i
]);
1232 if (element
< 0 || element
> 65535)
1235 if (nargs
<= 5 /* IPv4 */
1236 && i
< 4 /* host, not port */
1240 args
[i
+1] = p
->contents
[i
];
1243 return Fformat (nargs
+1, args
);
1246 if (CONSP (address
))
1248 Lisp_Object args
[2];
1249 args
[0] = build_string ("<Family %d>");
1250 args
[1] = Fcar (address
);
1251 return Fformat (2, args
);
1257 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1258 doc
: /* Return a list of all processes. */)
1261 return Fmapcar (Qcdr
, Vprocess_alist
);
1264 /* Starting asynchronous inferior processes. */
1266 static Lisp_Object
start_process_unwind (Lisp_Object proc
);
1268 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1269 doc
: /* Start a program in a subprocess. Return the process object for it.
1270 NAME is name for process. It is modified if necessary to make it unique.
1271 BUFFER is the buffer (or buffer name) to associate with the process.
1273 Process output (both standard output and standard error streams) goes
1274 at end of BUFFER, unless you specify an output stream or filter
1275 function to handle the output. BUFFER may also be nil, meaning that
1276 this process is not associated with any buffer.
1278 PROGRAM is the program file name. It is searched for in `exec-path'
1279 (which see). If nil, just associate a pty with the buffer. Remaining
1280 arguments are strings to give program as arguments.
1282 If you want to separate standard output from standard error, invoke
1283 the command through a shell and redirect one of them using the shell
1286 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1287 (ptrdiff_t nargs
, Lisp_Object
*args
)
1289 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1290 register unsigned char **new_argv
;
1292 int count
= SPECPDL_INDEX ();
1296 buffer
= Fget_buffer_create (buffer
);
1298 /* Make sure that the child will be able to chdir to the current
1299 buffer's current directory, or its unhandled equivalent. We
1300 can't just have the child check for an error when it does the
1301 chdir, since it's in a vfork.
1303 We have to GCPRO around this because Fexpand_file_name and
1304 Funhandled_file_name_directory might call a file name handling
1305 function. The argument list is protected by the caller, so all
1306 we really have to worry about is buffer. */
1308 struct gcpro gcpro1
, gcpro2
;
1310 current_dir
= BVAR (current_buffer
, directory
);
1312 GCPRO2 (buffer
, current_dir
);
1314 current_dir
= Funhandled_file_name_directory (current_dir
);
1315 if (NILP (current_dir
))
1316 /* If the file name handler says that current_dir is unreachable, use
1317 a sensible default. */
1318 current_dir
= build_string ("~/");
1319 current_dir
= expand_and_dir_to_file (current_dir
, Qnil
);
1320 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1321 report_file_error ("Setting current directory",
1322 Fcons (BVAR (current_buffer
, directory
), Qnil
));
1328 CHECK_STRING (name
);
1332 if (!NILP (program
))
1333 CHECK_STRING (program
);
1335 proc
= make_process (name
);
1336 /* If an error occurs and we can't start the process, we want to
1337 remove it from the process list. This means that each error
1338 check in create_process doesn't need to call remove_process
1339 itself; it's all taken care of here. */
1340 record_unwind_protect (start_process_unwind
, proc
);
1342 XPROCESS (proc
)->childp
= Qt
;
1343 XPROCESS (proc
)->plist
= Qnil
;
1344 XPROCESS (proc
)->type
= Qreal
;
1345 XPROCESS (proc
)->buffer
= buffer
;
1346 XPROCESS (proc
)->sentinel
= Qnil
;
1347 XPROCESS (proc
)->filter
= Qnil
;
1348 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1351 /* AKA GNUTLS_INITSTAGE(proc). */
1352 XPROCESS (proc
)->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
1353 XPROCESS (proc
)->gnutls_cred_type
= Qnil
;
1356 #ifdef ADAPTIVE_READ_BUFFERING
1357 XPROCESS (proc
)->adaptive_read_buffering
1358 = (NILP (Vprocess_adaptive_read_buffering
) ? 0
1359 : EQ (Vprocess_adaptive_read_buffering
, Qt
) ? 1 : 2);
1362 /* Make the process marker point into the process buffer (if any). */
1363 if (BUFFERP (buffer
))
1364 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1365 BUF_ZV (XBUFFER (buffer
)),
1366 BUF_ZV_BYTE (XBUFFER (buffer
)));
1369 /* Decide coding systems for communicating with the process. Here
1370 we don't setup the structure coding_system nor pay attention to
1371 unibyte mode. They are done in create_process. */
1373 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1374 Lisp_Object coding_systems
= Qt
;
1375 Lisp_Object val
, *args2
;
1376 struct gcpro gcpro1
, gcpro2
;
1378 val
= Vcoding_system_for_read
;
1381 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1382 args2
[0] = Qstart_process
;
1383 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1384 GCPRO2 (proc
, current_dir
);
1385 if (!NILP (program
))
1386 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1388 if (CONSP (coding_systems
))
1389 val
= XCAR (coding_systems
);
1390 else if (CONSP (Vdefault_process_coding_system
))
1391 val
= XCAR (Vdefault_process_coding_system
);
1393 XPROCESS (proc
)->decode_coding_system
= val
;
1395 val
= Vcoding_system_for_write
;
1398 if (EQ (coding_systems
, Qt
))
1400 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1401 args2
[0] = Qstart_process
;
1402 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1403 GCPRO2 (proc
, current_dir
);
1404 if (!NILP (program
))
1405 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1408 if (CONSP (coding_systems
))
1409 val
= XCDR (coding_systems
);
1410 else if (CONSP (Vdefault_process_coding_system
))
1411 val
= XCDR (Vdefault_process_coding_system
);
1413 XPROCESS (proc
)->encode_coding_system
= val
;
1414 /* Note: At this momemnt, the above coding system may leave
1415 text-conversion or eol-conversion unspecified. They will be
1416 decided after we read output from the process and decode it by
1417 some coding system, or just before we actually send a text to
1422 XPROCESS (proc
)->decoding_buf
= empty_unibyte_string
;
1423 XPROCESS (proc
)->decoding_carryover
= 0;
1424 XPROCESS (proc
)->encoding_buf
= empty_unibyte_string
;
1426 XPROCESS (proc
)->inherit_coding_system_flag
1427 = !(NILP (buffer
) || !inherit_process_coding_system
);
1429 if (!NILP (program
))
1431 /* If program file name is not absolute, search our path for it.
1432 Put the name we will really use in TEM. */
1433 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1434 && !(SCHARS (program
) > 1
1435 && IS_DEVICE_SEP (SREF (program
, 1))))
1437 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1440 GCPRO4 (name
, program
, buffer
, current_dir
);
1441 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1444 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1445 tem
= Fexpand_file_name (tem
, Qnil
);
1449 if (!NILP (Ffile_directory_p (program
)))
1450 error ("Specified program for new process is a directory");
1454 /* If program file name starts with /: for quoting a magic name,
1456 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1457 && SREF (tem
, 1) == ':')
1458 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1461 Lisp_Object arg_encoding
= Qnil
;
1462 struct gcpro gcpro1
;
1465 /* Encode the file name and put it in NEW_ARGV.
1466 That's where the child will use it to execute the program. */
1467 tem
= Fcons (ENCODE_FILE (tem
), Qnil
);
1469 /* Here we encode arguments by the coding system used for sending
1470 data to the process. We don't support using different coding
1471 systems for encoding arguments and for encoding data sent to the
1474 for (i
= 3; i
< nargs
; i
++)
1476 tem
= Fcons (args
[i
], tem
);
1477 CHECK_STRING (XCAR (tem
));
1478 if (STRING_MULTIBYTE (XCAR (tem
)))
1480 if (NILP (arg_encoding
))
1481 arg_encoding
= (complement_process_encoding_system
1482 (XPROCESS (proc
)->encode_coding_system
));
1484 code_convert_string_norecord
1485 (XCAR (tem
), arg_encoding
, 1));
1492 /* Now that everything is encoded we can collect the strings into
1494 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1495 new_argv
[nargs
- 2] = 0;
1497 for (i
= nargs
- 2; i
-- != 0; )
1499 new_argv
[i
] = SDATA (XCAR (tem
));
1503 create_process (proc
, (char **) new_argv
, current_dir
);
1508 return unbind_to (count
, proc
);
1511 /* This function is the unwind_protect form for Fstart_process. If
1512 PROC doesn't have its pid set, then we know someone has signaled
1513 an error and the process wasn't started successfully, so we should
1514 remove it from the process list. */
1516 start_process_unwind (Lisp_Object proc
)
1518 if (!PROCESSP (proc
))
1521 /* Was PROC started successfully? */
1522 if (XPROCESS (proc
)->pid
== -1)
1523 remove_process (proc
);
1529 create_process_1 (struct atimer
*timer
)
1531 /* Nothing to do. */
1536 create_process (Lisp_Object process
, char **new_argv
, Lisp_Object current_dir
)
1538 int inchannel
, outchannel
;
1541 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1542 int wait_child_setup
[2];
1546 struct sigaction sigint_action
;
1547 struct sigaction sigquit_action
;
1548 struct sigaction sigpipe_action
;
1550 struct sigaction sighup_action
;
1552 /* Use volatile to protect variables from being clobbered by longjmp. */
1553 volatile int forkin
, forkout
;
1554 volatile int pty_flag
= 0;
1556 extern char **environ
;
1559 inchannel
= outchannel
= -1;
1562 if (!NILP (Vprocess_connection_type
))
1563 outchannel
= inchannel
= allocate_pty ();
1567 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1568 /* On most USG systems it does not work to open the pty's tty here,
1569 then close it and reopen it in the child. */
1571 /* Don't let this terminal become our controlling terminal
1572 (in case we don't have one). */
1573 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1575 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1578 report_file_error ("Opening pty", Qnil
);
1580 forkin
= forkout
= -1;
1581 #endif /* not USG, or USG_SUBTTY_WORKS */
1585 #endif /* HAVE_PTYS */
1590 report_file_error ("Creating pipe", Qnil
);
1596 emacs_close (inchannel
);
1597 emacs_close (forkout
);
1598 report_file_error ("Creating pipe", Qnil
);
1604 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1608 tem
= pipe (wait_child_setup
);
1610 report_file_error ("Creating pipe", Qnil
);
1611 tem
= fcntl (wait_child_setup
[1], F_GETFD
, 0);
1613 tem
= fcntl (wait_child_setup
[1], F_SETFD
, tem
| FD_CLOEXEC
);
1616 emacs_close (wait_child_setup
[0]);
1617 emacs_close (wait_child_setup
[1]);
1618 report_file_error ("Setting file descriptor flags", Qnil
);
1624 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1625 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1628 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1629 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1633 /* Record this as an active process, with its channels.
1634 As a result, child_setup will close Emacs's side of the pipes. */
1635 chan_process
[inchannel
] = process
;
1636 XPROCESS (process
)->infd
= inchannel
;
1637 XPROCESS (process
)->outfd
= outchannel
;
1639 /* Previously we recorded the tty descriptor used in the subprocess.
1640 It was only used for getting the foreground tty process, so now
1641 we just reopen the device (see emacs_get_tty_pgrp) as this is
1642 more portable (see USG_SUBTTY_WORKS above). */
1644 XPROCESS (process
)->pty_flag
= pty_flag
;
1645 XPROCESS (process
)->status
= Qrun
;
1646 setup_process_coding_systems (process
);
1648 /* Delay interrupts until we have a chance to store
1649 the new fork's pid in its process structure */
1650 sigemptyset (&blocked
);
1652 sigaddset (&blocked
, SIGCHLD
);
1654 #ifdef HAVE_WORKING_VFORK
1655 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1656 this sets the parent's signal handlers as well as the child's.
1657 So delay all interrupts whose handlers the child might munge,
1658 and record the current handlers so they can be restored later. */
1659 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1660 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1661 sigaddset (&blocked
, SIGPIPE
); sigaction (SIGPIPE
, 0, &sigpipe_action
);
1663 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1665 #endif /* HAVE_WORKING_VFORK */
1666 pthread_sigmask (SIG_BLOCK
, &blocked
, &procmask
);
1668 FD_SET (inchannel
, &input_wait_mask
);
1669 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1670 if (inchannel
> max_process_desc
)
1671 max_process_desc
= inchannel
;
1673 /* Until we store the proper pid, enable sigchld_handler
1674 to recognize an unknown pid as standing for this process.
1675 It is very important not to let this `marker' value stay
1676 in the table after this function has returned; if it does
1677 it might cause call-process to hang and subsequent asynchronous
1678 processes to get their return values scrambled. */
1679 XPROCESS (process
)->pid
= -1;
1684 /* child_setup must clobber environ on systems with true vfork.
1685 Protect it from permanent change. */
1686 char **save_environ
= environ
;
1687 volatile Lisp_Object encoded_current_dir
= ENCODE_FILE (current_dir
);
1692 #endif /* not WINDOWSNT */
1694 int xforkin
= forkin
;
1695 int xforkout
= forkout
;
1697 #if 0 /* This was probably a mistake--it duplicates code later on,
1698 but fails to handle all the cases. */
1699 /* Make sure SIGCHLD is not blocked in the child. */
1700 sigsetmask (SIGEMPTYMASK
);
1703 /* Make the pty be the controlling terminal of the process. */
1705 /* First, disconnect its current controlling terminal. */
1707 /* We tried doing setsid only if pty_flag, but it caused
1708 process_set_signal to fail on SGI when using a pipe. */
1710 /* Make the pty's terminal the controlling terminal. */
1711 if (pty_flag
&& xforkin
>= 0)
1714 /* We ignore the return value
1715 because faith@cs.unc.edu says that is necessary on Linux. */
1716 ioctl (xforkin
, TIOCSCTTY
, 0);
1719 #else /* not HAVE_SETSID */
1721 /* It's very important to call setpgrp here and no time
1722 afterwards. Otherwise, we lose our controlling tty which
1723 is set when we open the pty. */
1726 #endif /* not HAVE_SETSID */
1727 #if defined (LDISC1)
1728 if (pty_flag
&& xforkin
>= 0)
1731 tcgetattr (xforkin
, &t
);
1733 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1734 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1737 #if defined (NTTYDISC) && defined (TIOCSETD)
1738 if (pty_flag
&& xforkin
>= 0)
1740 /* Use new line discipline. */
1741 int ldisc
= NTTYDISC
;
1742 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1747 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1748 can do TIOCSPGRP only to the process's controlling tty. */
1751 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1752 I can't test it since I don't have 4.3. */
1753 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1756 ioctl (j
, TIOCNOTTY
, 0);
1760 /* In order to get a controlling terminal on some versions
1761 of BSD, it is necessary to put the process in pgrp 0
1762 before it opens the terminal. */
1770 #endif /* TIOCNOTTY */
1772 #if !defined (DONT_REOPEN_PTY)
1773 /*** There is a suggestion that this ought to be a
1774 conditional on TIOCSPGRP,
1775 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1776 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1777 that system does seem to need this code, even though
1778 both HAVE_SETSID and TIOCSCTTY are defined. */
1779 /* Now close the pty (if we had it open) and reopen it.
1780 This makes the pty the controlling terminal of the subprocess. */
1784 /* I wonder if emacs_close (emacs_open (pty_name, ...))
1787 emacs_close (xforkin
);
1788 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
1792 emacs_write (1, "Couldn't open the pty terminal ", 31);
1793 emacs_write (1, pty_name
, strlen (pty_name
));
1794 emacs_write (1, "\n", 1);
1799 #endif /* not DONT_REOPEN_PTY */
1801 #ifdef SETUP_SLAVE_PTY
1806 #endif /* SETUP_SLAVE_PTY */
1808 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1809 Now reenable it in the child, so it will die when we want it to. */
1811 signal (SIGHUP
, SIG_DFL
);
1813 #endif /* HAVE_PTYS */
1815 signal (SIGINT
, SIG_DFL
);
1816 signal (SIGQUIT
, SIG_DFL
);
1817 /* GConf causes us to ignore SIGPIPE, make sure it is restored
1819 signal (SIGPIPE
, SIG_DFL
);
1821 /* Stop blocking signals in the child. */
1822 pthread_sigmask (SIG_SETMASK
, &procmask
, 0);
1825 child_setup_tty (xforkout
);
1827 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1828 new_argv
, 1, encoded_current_dir
);
1829 #else /* not WINDOWSNT */
1831 emacs_close (wait_child_setup
[0]);
1833 child_setup (xforkin
, xforkout
, xforkout
,
1834 new_argv
, 1, encoded_current_dir
);
1835 #endif /* not WINDOWSNT */
1837 environ
= save_environ
;
1842 /* This runs in the Emacs process. */
1846 emacs_close (forkin
);
1847 if (forkin
!= forkout
&& forkout
>= 0)
1848 emacs_close (forkout
);
1852 /* vfork succeeded. */
1853 XPROCESS (process
)->pid
= pid
;
1856 register_child (pid
, inchannel
);
1857 #endif /* WINDOWSNT */
1859 /* If the subfork execv fails, and it exits,
1860 this close hangs. I don't know why.
1861 So have an interrupt jar it loose. */
1863 struct atimer
*timer
;
1867 EMACS_SET_SECS_USECS (offset
, 1, 0);
1868 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
1871 emacs_close (forkin
);
1873 cancel_atimer (timer
);
1877 if (forkin
!= forkout
&& forkout
>= 0)
1878 emacs_close (forkout
);
1882 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1885 XPROCESS (process
)->tty_name
= Qnil
;
1887 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1888 /* Wait for child_setup to complete in case that vfork is
1889 actually defined as fork. The descriptor wait_child_setup[1]
1890 of a pipe is closed at the child side either by close-on-exec
1891 on successful execvp or the _exit call in child_setup. */
1895 emacs_close (wait_child_setup
[1]);
1896 emacs_read (wait_child_setup
[0], &dummy
, 1);
1897 emacs_close (wait_child_setup
[0]);
1902 /* Restore the signal state whether vfork succeeded or not.
1903 (We will signal an error, below, if it failed.) */
1904 #ifdef HAVE_WORKING_VFORK
1905 /* Restore the parent's signal handlers. */
1906 sigaction (SIGINT
, &sigint_action
, 0);
1907 sigaction (SIGQUIT
, &sigquit_action
, 0);
1908 sigaction (SIGPIPE
, &sigpipe_action
, 0);
1910 sigaction (SIGHUP
, &sighup_action
, 0);
1912 #endif /* HAVE_WORKING_VFORK */
1913 /* Stop blocking signals in the parent. */
1914 pthread_sigmask (SIG_SETMASK
, &procmask
, 0);
1916 /* Now generate the error if vfork failed. */
1918 report_file_error ("Doing vfork", Qnil
);
1922 create_pty (Lisp_Object process
)
1924 int inchannel
, outchannel
;
1927 inchannel
= outchannel
= -1;
1930 if (!NILP (Vprocess_connection_type
))
1931 outchannel
= inchannel
= allocate_pty ();
1935 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1936 /* On most USG systems it does not work to open the pty's tty here,
1937 then close it and reopen it in the child. */
1939 /* Don't let this terminal become our controlling terminal
1940 (in case we don't have one). */
1941 int forkout
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1943 int forkout
= emacs_open (pty_name
, O_RDWR
, 0);
1946 report_file_error ("Opening pty", Qnil
);
1947 #if defined (DONT_REOPEN_PTY)
1948 /* In the case that vfork is defined as fork, the parent process
1949 (Emacs) may send some data before the child process completes
1950 tty options setup. So we setup tty before forking. */
1951 child_setup_tty (forkout
);
1952 #endif /* DONT_REOPEN_PTY */
1953 #endif /* not USG, or USG_SUBTTY_WORKS */
1956 #endif /* HAVE_PTYS */
1959 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1960 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1963 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1964 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1968 /* Record this as an active process, with its channels.
1969 As a result, child_setup will close Emacs's side of the pipes. */
1970 chan_process
[inchannel
] = process
;
1971 XPROCESS (process
)->infd
= inchannel
;
1972 XPROCESS (process
)->outfd
= outchannel
;
1974 /* Previously we recorded the tty descriptor used in the subprocess.
1975 It was only used for getting the foreground tty process, so now
1976 we just reopen the device (see emacs_get_tty_pgrp) as this is
1977 more portable (see USG_SUBTTY_WORKS above). */
1979 XPROCESS (process
)->pty_flag
= pty_flag
;
1980 XPROCESS (process
)->status
= Qrun
;
1981 setup_process_coding_systems (process
);
1983 FD_SET (inchannel
, &input_wait_mask
);
1984 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1985 if (inchannel
> max_process_desc
)
1986 max_process_desc
= inchannel
;
1988 XPROCESS (process
)->pid
= -2;
1991 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1994 XPROCESS (process
)->tty_name
= Qnil
;
1998 /* Convert an internal struct sockaddr to a lisp object (vector or string).
1999 The address family of sa is not included in the result. */
2002 conv_sockaddr_to_lisp (struct sockaddr
*sa
, int len
)
2004 Lisp_Object address
;
2007 register struct Lisp_Vector
*p
;
2009 /* Workaround for a bug in getsockname on BSD: Names bound to
2010 sockets in the UNIX domain are inaccessible; getsockname returns
2011 a zero length name. */
2012 if (len
< offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
))
2013 return empty_unibyte_string
;
2015 switch (sa
->sa_family
)
2019 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2020 len
= sizeof (sin
->sin_addr
) + 1;
2021 address
= Fmake_vector (make_number (len
), Qnil
);
2022 p
= XVECTOR (address
);
2023 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2024 cp
= (unsigned char *) &sin
->sin_addr
;
2030 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2031 uint16_t *ip6
= (uint16_t *) &sin6
->sin6_addr
;
2032 len
= sizeof (sin6
->sin6_addr
)/2 + 1;
2033 address
= Fmake_vector (make_number (len
), Qnil
);
2034 p
= XVECTOR (address
);
2035 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
2036 for (i
= 0; i
< len
; i
++)
2037 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
2041 #ifdef HAVE_LOCAL_SOCKETS
2044 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2045 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2046 if (sockun
->sun_path
[i
] == 0)
2048 return make_unibyte_string (sockun
->sun_path
, i
);
2052 len
-= offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
);
2053 address
= Fcons (make_number (sa
->sa_family
),
2054 Fmake_vector (make_number (len
), Qnil
));
2055 p
= XVECTOR (XCDR (address
));
2056 cp
= (unsigned char *) &sa
->sa_family
+ sizeof (sa
->sa_family
);
2062 p
->contents
[i
++] = make_number (*cp
++);
2068 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2071 get_lisp_to_sockaddr_size (Lisp_Object address
, int *familyp
)
2073 register struct Lisp_Vector
*p
;
2075 if (VECTORP (address
))
2077 p
= XVECTOR (address
);
2078 if (p
->header
.size
== 5)
2081 return sizeof (struct sockaddr_in
);
2084 else if (p
->header
.size
== 9)
2086 *familyp
= AF_INET6
;
2087 return sizeof (struct sockaddr_in6
);
2091 #ifdef HAVE_LOCAL_SOCKETS
2092 else if (STRINGP (address
))
2094 *familyp
= AF_LOCAL
;
2095 return sizeof (struct sockaddr_un
);
2098 else if (CONSP (address
) && INTEGERP (XCAR (address
)) && VECTORP (XCDR (address
)))
2100 struct sockaddr
*sa
;
2101 *familyp
= XINT (XCAR (address
));
2102 p
= XVECTOR (XCDR (address
));
2103 return p
->header
.size
+ sizeof (sa
->sa_family
);
2108 /* Convert an address object (vector or string) to an internal sockaddr.
2110 The address format has been basically validated by
2111 get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid;
2112 it could have come from user data. So if FAMILY is not valid,
2113 we return after zeroing *SA. */
2116 conv_lisp_to_sockaddr (int family
, Lisp_Object address
, struct sockaddr
*sa
, int len
)
2118 register struct Lisp_Vector
*p
;
2119 register unsigned char *cp
= NULL
;
2122 memset (sa
, 0, len
);
2124 if (VECTORP (address
))
2126 p
= XVECTOR (address
);
2127 if (family
== AF_INET
)
2129 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2130 len
= sizeof (sin
->sin_addr
) + 1;
2131 i
= XINT (p
->contents
[--len
]);
2132 sin
->sin_port
= htons (i
);
2133 cp
= (unsigned char *)&sin
->sin_addr
;
2134 sa
->sa_family
= family
;
2137 else if (family
== AF_INET6
)
2139 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2140 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2141 len
= sizeof (sin6
->sin6_addr
) + 1;
2142 i
= XINT (p
->contents
[--len
]);
2143 sin6
->sin6_port
= htons (i
);
2144 for (i
= 0; i
< len
; i
++)
2145 if (INTEGERP (p
->contents
[i
]))
2147 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2150 sa
->sa_family
= family
;
2157 else if (STRINGP (address
))
2159 #ifdef HAVE_LOCAL_SOCKETS
2160 if (family
== AF_LOCAL
)
2162 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2163 cp
= SDATA (address
);
2164 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2165 sockun
->sun_path
[i
] = *cp
++;
2166 sa
->sa_family
= family
;
2173 p
= XVECTOR (XCDR (address
));
2174 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2177 for (i
= 0; i
< len
; i
++)
2178 if (INTEGERP (p
->contents
[i
]))
2179 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2182 #ifdef DATAGRAM_SOCKETS
2183 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2185 doc
: /* Get the current datagram address associated with PROCESS. */)
2186 (Lisp_Object process
)
2190 CHECK_PROCESS (process
);
2192 if (!DATAGRAM_CONN_P (process
))
2195 channel
= XPROCESS (process
)->infd
;
2196 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2197 datagram_address
[channel
].len
);
2200 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2202 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2203 Returns nil upon error setting address, ADDRESS otherwise. */)
2204 (Lisp_Object process
, Lisp_Object address
)
2209 CHECK_PROCESS (process
);
2211 if (!DATAGRAM_CONN_P (process
))
2214 channel
= XPROCESS (process
)->infd
;
2216 len
= get_lisp_to_sockaddr_size (address
, &family
);
2217 if (datagram_address
[channel
].len
!= len
)
2219 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2225 static const struct socket_options
{
2226 /* The name of this option. Should be lowercase version of option
2227 name without SO_ prefix. */
2229 /* Option level SOL_... */
2231 /* Option number SO_... */
2233 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2234 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2235 } socket_options
[] =
2237 #ifdef SO_BINDTODEVICE
2238 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2241 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2244 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2247 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2250 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2253 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2256 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2259 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2261 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2264 /* Set option OPT to value VAL on socket S.
2266 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2267 Signals an error if setting a known option fails.
2271 set_socket_option (int s
, Lisp_Object opt
, Lisp_Object val
)
2274 const struct socket_options
*sopt
;
2279 name
= SSDATA (SYMBOL_NAME (opt
));
2280 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2281 if (strcmp (name
, sopt
->name
) == 0)
2284 switch (sopt
->opttype
)
2289 optval
= NILP (val
) ? 0 : 1;
2290 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2291 &optval
, sizeof (optval
));
2299 optval
= XINT (val
);
2301 error ("Bad option value for %s", name
);
2302 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2303 &optval
, sizeof (optval
));
2307 #ifdef SO_BINDTODEVICE
2310 char devname
[IFNAMSIZ
+1];
2312 /* This is broken, at least in the Linux 2.4 kernel.
2313 To unbind, the arg must be a zero integer, not the empty string.
2314 This should work on all systems. KFS. 2003-09-23. */
2315 memset (devname
, 0, sizeof devname
);
2318 char *arg
= SSDATA (val
);
2319 int len
= min (strlen (arg
), IFNAMSIZ
);
2320 memcpy (devname
, arg
, len
);
2322 else if (!NILP (val
))
2323 error ("Bad option value for %s", name
);
2324 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2333 struct linger linger
;
2336 linger
.l_linger
= 0;
2338 linger
.l_linger
= XINT (val
);
2340 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2341 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2342 &linger
, sizeof (linger
));
2352 report_file_error ("Cannot set network option",
2353 Fcons (opt
, Fcons (val
, Qnil
)));
2354 return (1 << sopt
->optbit
);
2358 DEFUN ("set-network-process-option",
2359 Fset_network_process_option
, Sset_network_process_option
,
2361 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2362 See `make-network-process' for a list of options and values.
2363 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2364 OPTION is not a supported option, return nil instead; otherwise return t. */)
2365 (Lisp_Object process
, Lisp_Object option
, Lisp_Object value
, Lisp_Object no_error
)
2368 struct Lisp_Process
*p
;
2370 CHECK_PROCESS (process
);
2371 p
= XPROCESS (process
);
2372 if (!NETCONN1_P (p
))
2373 error ("Process is not a network process");
2377 error ("Process is not running");
2379 if (set_socket_option (s
, option
, value
))
2381 p
->childp
= Fplist_put (p
->childp
, option
, value
);
2385 if (NILP (no_error
))
2386 error ("Unknown or unsupported option");
2392 DEFUN ("serial-process-configure",
2393 Fserial_process_configure
,
2394 Sserial_process_configure
,
2396 doc
: /* Configure speed, bytesize, etc. of a serial process.
2398 Arguments are specified as keyword/argument pairs. Attributes that
2399 are not given are re-initialized from the process's current
2400 configuration (available via the function `process-contact') or set to
2401 reasonable default values. The following arguments are defined:
2407 -- Any of these arguments can be given to identify the process that is
2408 to be configured. If none of these arguments is given, the current
2409 buffer's process is used.
2411 :speed SPEED -- SPEED is the speed of the serial port in bits per
2412 second, also called baud rate. Any value can be given for SPEED, but
2413 most serial ports work only at a few defined values between 1200 and
2414 115200, with 9600 being the most common value. If SPEED is nil, the
2415 serial port is not configured any further, i.e., all other arguments
2416 are ignored. This may be useful for special serial ports such as
2417 Bluetooth-to-serial converters which can only be configured through AT
2418 commands. A value of nil for SPEED can be used only when passed
2419 through `make-serial-process' or `serial-term'.
2421 :bytesize BYTESIZE -- BYTESIZE is the number of bits per byte, which
2422 can be 7 or 8. If BYTESIZE is not given or nil, a value of 8 is used.
2424 :parity PARITY -- PARITY can be nil (don't use parity), the symbol
2425 `odd' (use odd parity), or the symbol `even' (use even parity). If
2426 PARITY is not given, no parity is used.
2428 :stopbits STOPBITS -- STOPBITS is the number of stopbits used to
2429 terminate a byte transmission. STOPBITS can be 1 or 2. If STOPBITS
2430 is not given or nil, 1 stopbit is used.
2432 :flowcontrol FLOWCONTROL -- FLOWCONTROL determines the type of
2433 flowcontrol to be used, which is either nil (don't use flowcontrol),
2434 the symbol `hw' (use RTS/CTS hardware flowcontrol), or the symbol `sw'
2435 \(use XON/XOFF software flowcontrol). If FLOWCONTROL is not given, no
2436 flowcontrol is used.
2438 `serial-process-configure' is called by `make-serial-process' for the
2439 initial configuration of the serial port.
2443 \(serial-process-configure :process "/dev/ttyS0" :speed 1200)
2445 \(serial-process-configure
2446 :buffer "COM1" :stopbits 1 :parity 'odd :flowcontrol 'hw)
2448 \(serial-process-configure :port "\\\\.\\COM13" :bytesize 7)
2450 usage: (serial-process-configure &rest ARGS) */)
2451 (ptrdiff_t nargs
, Lisp_Object
*args
)
2453 struct Lisp_Process
*p
;
2454 Lisp_Object contact
= Qnil
;
2455 Lisp_Object proc
= Qnil
;
2456 struct gcpro gcpro1
;
2458 contact
= Flist (nargs
, args
);
2461 proc
= Fplist_get (contact
, QCprocess
);
2463 proc
= Fplist_get (contact
, QCname
);
2465 proc
= Fplist_get (contact
, QCbuffer
);
2467 proc
= Fplist_get (contact
, QCport
);
2468 proc
= get_process (proc
);
2469 p
= XPROCESS (proc
);
2470 if (!EQ (p
->type
, Qserial
))
2471 error ("Not a serial process");
2473 if (NILP (Fplist_get (p
->childp
, QCspeed
)))
2479 serial_configure (p
, contact
);
2485 /* Used by make-serial-process to recover from errors. */
2487 make_serial_process_unwind (Lisp_Object proc
)
2489 if (!PROCESSP (proc
))
2491 remove_process (proc
);
2495 DEFUN ("make-serial-process", Fmake_serial_process
, Smake_serial_process
,
2497 doc
: /* Create and return a serial port process.
2499 In Emacs, serial port connections are represented by process objects,
2500 so input and output work as for subprocesses, and `delete-process'
2501 closes a serial port connection. However, a serial process has no
2502 process id, it cannot be signaled, and the status codes are different
2503 from normal processes.
2505 `make-serial-process' creates a process and a buffer, on which you
2506 probably want to use `process-send-string'. Try \\[serial-term] for
2507 an interactive terminal. See below for examples.
2509 Arguments are specified as keyword/argument pairs. The following
2510 arguments are defined:
2512 :port PORT -- (mandatory) PORT is the path or name of the serial port.
2513 For example, this could be "/dev/ttyS0" on Unix. On Windows, this
2514 could be "COM1", or "\\\\.\\COM10" for ports higher than COM9 (double
2515 the backslashes in strings).
2517 :speed SPEED -- (mandatory) is handled by `serial-process-configure',
2518 which is called by `make-serial-process'.
2520 :name NAME -- NAME is the name of the process. If NAME is not given,
2521 the value of PORT is used.
2523 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2524 with the process. Process output goes at the end of that buffer,
2525 unless you specify an output stream or filter function to handle the
2526 output. If BUFFER is not given, the value of NAME is used.
2528 :coding CODING -- If CODING is a symbol, it specifies the coding
2529 system used for both reading and writing for this process. If CODING
2530 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2531 ENCODING is used for writing.
2533 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2534 the process is running. If BOOL is not given, query before exiting.
2536 :stop BOOL -- Start process in the `stopped' state if BOOL is non-nil.
2537 In the stopped state, a serial process does not accept incoming data,
2538 but you can send outgoing data. The stopped state is cleared by
2539 `continue-process' and set by `stop-process'.
2541 :filter FILTER -- Install FILTER as the process filter.
2543 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2545 :plist PLIST -- Install PLIST as the initial plist of the process.
2552 -- These arguments are handled by `serial-process-configure', which is
2553 called by `make-serial-process'.
2555 The original argument list, possibly modified by later configuration,
2556 is available via the function `process-contact'.
2560 \(make-serial-process :port "/dev/ttyS0" :speed 9600)
2562 \(make-serial-process :port "COM1" :speed 115200 :stopbits 2)
2564 \(make-serial-process :port "\\\\.\\COM13" :speed 1200 :bytesize 7 :parity 'odd)
2566 \(make-serial-process :port "/dev/tty.BlueConsole-SPP-1" :speed nil)
2568 usage: (make-serial-process &rest ARGS) */)
2569 (ptrdiff_t nargs
, Lisp_Object
*args
)
2572 Lisp_Object proc
, contact
, port
;
2573 struct Lisp_Process
*p
;
2574 struct gcpro gcpro1
;
2575 Lisp_Object name
, buffer
;
2576 Lisp_Object tem
, val
;
2577 int specpdl_count
= -1;
2582 contact
= Flist (nargs
, args
);
2585 port
= Fplist_get (contact
, QCport
);
2587 error ("No port specified");
2588 CHECK_STRING (port
);
2590 if (NILP (Fplist_member (contact
, QCspeed
)))
2591 error (":speed not specified");
2592 if (!NILP (Fplist_get (contact
, QCspeed
)))
2593 CHECK_NUMBER (Fplist_get (contact
, QCspeed
));
2595 name
= Fplist_get (contact
, QCname
);
2598 CHECK_STRING (name
);
2599 proc
= make_process (name
);
2600 specpdl_count
= SPECPDL_INDEX ();
2601 record_unwind_protect (make_serial_process_unwind
, proc
);
2602 p
= XPROCESS (proc
);
2604 fd
= serial_open (SSDATA (port
));
2607 if (fd
> max_process_desc
)
2608 max_process_desc
= fd
;
2609 chan_process
[fd
] = proc
;
2611 buffer
= Fplist_get (contact
, QCbuffer
);
2614 buffer
= Fget_buffer_create (buffer
);
2617 p
->childp
= contact
;
2618 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
2620 p
->sentinel
= Fplist_get (contact
, QCsentinel
);
2621 p
->filter
= Fplist_get (contact
, QCfilter
);
2623 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
2624 p
->kill_without_query
= 1;
2625 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
2629 if (!EQ (p
->command
, Qt
))
2631 FD_SET (fd
, &input_wait_mask
);
2632 FD_SET (fd
, &non_keyboard_wait_mask
);
2635 if (BUFFERP (buffer
))
2637 set_marker_both (p
->mark
, buffer
,
2638 BUF_ZV (XBUFFER (buffer
)),
2639 BUF_ZV_BYTE (XBUFFER (buffer
)));
2642 tem
= Fplist_member (contact
, QCcoding
);
2643 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
2649 val
= XCAR (XCDR (tem
));
2653 else if (!NILP (Vcoding_system_for_read
))
2654 val
= Vcoding_system_for_read
;
2655 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2656 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2658 p
->decode_coding_system
= val
;
2663 val
= XCAR (XCDR (tem
));
2667 else if (!NILP (Vcoding_system_for_write
))
2668 val
= Vcoding_system_for_write
;
2669 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2670 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2672 p
->encode_coding_system
= val
;
2674 setup_process_coding_systems (proc
);
2675 p
->decoding_buf
= empty_unibyte_string
;
2676 p
->decoding_carryover
= 0;
2677 p
->encoding_buf
= empty_unibyte_string
;
2678 p
->inherit_coding_system_flag
2679 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
2681 Fserial_process_configure (nargs
, args
);
2683 specpdl_ptr
= specpdl
+ specpdl_count
;
2689 /* Create a network stream/datagram client/server process. Treated
2690 exactly like a normal process when reading and writing. Primary
2691 differences are in status display and process deletion. A network
2692 connection has no PID; you cannot signal it. All you can do is
2693 stop/continue it and deactivate/close it via delete-process */
2695 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2697 doc
: /* Create and return a network server or client process.
2699 In Emacs, network connections are represented by process objects, so
2700 input and output work as for subprocesses and `delete-process' closes
2701 a network connection. However, a network process has no process id,
2702 it cannot be signaled, and the status codes are different from normal
2705 Arguments are specified as keyword/argument pairs. The following
2706 arguments are defined:
2708 :name NAME -- NAME is name for process. It is modified if necessary
2711 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2712 with the process. Process output goes at end of that buffer, unless
2713 you specify an output stream or filter function to handle the output.
2714 BUFFER may be also nil, meaning that this process is not associated
2717 :host HOST -- HOST is name of the host to connect to, or its IP
2718 address. The symbol `local' specifies the local host. If specified
2719 for a server process, it must be a valid name or address for the local
2720 host, and only clients connecting to that address will be accepted.
2722 :service SERVICE -- SERVICE is name of the service desired, or an
2723 integer specifying a port number to connect to. If SERVICE is t,
2724 a random port number is selected for the server. (If Emacs was
2725 compiled with getaddrinfo, a port number can also be specified as a
2726 string, e.g. "80", as well as an integer. This is not portable.)
2728 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2729 stream type connection, `datagram' creates a datagram type connection,
2730 `seqpacket' creates a reliable datagram connection.
2732 :family FAMILY -- FAMILY is the address (and protocol) family for the
2733 service specified by HOST and SERVICE. The default (nil) is to use
2734 whatever address family (IPv4 or IPv6) that is defined for the host
2735 and port number specified by HOST and SERVICE. Other address families
2737 local -- for a local (i.e. UNIX) address specified by SERVICE.
2738 ipv4 -- use IPv4 address family only.
2739 ipv6 -- use IPv6 address family only.
2741 :local ADDRESS -- ADDRESS is the local address used for the connection.
2742 This parameter is ignored when opening a client process. When specified
2743 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2745 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2746 connection. This parameter is ignored when opening a stream server
2747 process. For a datagram server process, it specifies the initial
2748 setting of the remote datagram address. When specified for a client
2749 process, the FAMILY, HOST, and SERVICE args are ignored.
2751 The format of ADDRESS depends on the address family:
2752 - An IPv4 address is represented as an vector of integers [A B C D P]
2753 corresponding to numeric IP address A.B.C.D and port number P.
2754 - A local address is represented as a string with the address in the
2755 local address space.
2756 - An "unsupported family" address is represented by a cons (F . AV)
2757 where F is the family number and AV is a vector containing the socket
2758 address data with one element per address data byte. Do not rely on
2759 this format in portable code, as it may depend on implementation
2760 defined constants, data sizes, and data structure alignment.
2762 :coding CODING -- If CODING is a symbol, it specifies the coding
2763 system used for both reading and writing for this process. If CODING
2764 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2765 ENCODING is used for writing.
2767 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2768 return without waiting for the connection to complete; instead, the
2769 sentinel function will be called with second arg matching "open" (if
2770 successful) or "failed" when the connect completes. Default is to use
2771 a blocking connect (i.e. wait) for stream type connections.
2773 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2774 running when Emacs is exited.
2776 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2777 In the stopped state, a server process does not accept new
2778 connections, and a client process does not handle incoming traffic.
2779 The stopped state is cleared by `continue-process' and set by
2782 :filter FILTER -- Install FILTER as the process filter.
2784 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2785 process filter are multibyte, otherwise they are unibyte.
2786 If this keyword is not specified, the strings are multibyte if
2787 `default-enable-multibyte-characters' is non-nil.
2789 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2791 :log LOG -- Install LOG as the server process log function. This
2792 function is called when the server accepts a network connection from a
2793 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2794 is the server process, CLIENT is the new process for the connection,
2795 and MESSAGE is a string.
2797 :plist PLIST -- Install PLIST as the new process' initial plist.
2799 :server QLEN -- if QLEN is non-nil, create a server process for the
2800 specified FAMILY, SERVICE, and connection type (stream or datagram).
2801 If QLEN is an integer, it is used as the max. length of the server's
2802 pending connection queue (also known as the backlog); the default
2803 queue length is 5. Default is to create a client process.
2805 The following network options can be specified for this connection:
2807 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2808 :dontroute BOOL -- Only send to directly connected hosts.
2809 :keepalive BOOL -- Send keep-alive messages on network stream.
2810 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2811 :oobinline BOOL -- Place out-of-band data in receive data stream.
2812 :priority INT -- Set protocol defined priority for sent packets.
2813 :reuseaddr BOOL -- Allow reusing a recently used local address
2814 (this is allowed by default for a server process).
2815 :bindtodevice NAME -- bind to interface NAME. Using this may require
2816 special privileges on some systems.
2818 Consult the relevant system programmer's manual pages for more
2819 information on using these options.
2822 A server process will listen for and accept connections from clients.
2823 When a client connection is accepted, a new network process is created
2824 for the connection with the following parameters:
2826 - The client's process name is constructed by concatenating the server
2827 process' NAME and a client identification string.
2828 - If the FILTER argument is non-nil, the client process will not get a
2829 separate process buffer; otherwise, the client's process buffer is a newly
2830 created buffer named after the server process' BUFFER name or process
2831 NAME concatenated with the client identification string.
2832 - The connection type and the process filter and sentinel parameters are
2833 inherited from the server process' TYPE, FILTER and SENTINEL.
2834 - The client process' contact info is set according to the client's
2835 addressing information (typically an IP address and a port number).
2836 - The client process' plist is initialized from the server's plist.
2838 Notice that the FILTER and SENTINEL args are never used directly by
2839 the server process. Also, the BUFFER argument is not used directly by
2840 the server process, but via the optional :log function, accepted (and
2841 failed) connections may be logged in the server process' buffer.
2843 The original argument list, modified with the actual connection
2844 information, is available via the `process-contact' function.
2846 usage: (make-network-process &rest ARGS) */)
2847 (ptrdiff_t nargs
, Lisp_Object
*args
)
2850 Lisp_Object contact
;
2851 struct Lisp_Process
*p
;
2852 #ifdef HAVE_GETADDRINFO
2853 struct addrinfo ai
, *res
, *lres
;
2854 struct addrinfo hints
;
2855 const char *portstring
;
2857 #else /* HAVE_GETADDRINFO */
2858 struct _emacs_addrinfo
2864 struct sockaddr
*ai_addr
;
2865 struct _emacs_addrinfo
*ai_next
;
2867 #endif /* HAVE_GETADDRINFO */
2868 struct sockaddr_in address_in
;
2869 #ifdef HAVE_LOCAL_SOCKETS
2870 struct sockaddr_un address_un
;
2875 int s
= -1, outch
, inch
;
2876 struct gcpro gcpro1
;
2877 int count
= SPECPDL_INDEX ();
2879 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2881 Lisp_Object name
, buffer
, host
, service
, address
;
2882 Lisp_Object filter
, sentinel
;
2883 int is_non_blocking_client
= 0;
2884 int is_server
= 0, backlog
= 5;
2891 /* Save arguments for process-contact and clone-process. */
2892 contact
= Flist (nargs
, args
);
2896 /* Ensure socket support is loaded if available. */
2897 init_winsock (TRUE
);
2900 /* :type TYPE (nil: stream, datagram */
2901 tem
= Fplist_get (contact
, QCtype
);
2903 socktype
= SOCK_STREAM
;
2904 #ifdef DATAGRAM_SOCKETS
2905 else if (EQ (tem
, Qdatagram
))
2906 socktype
= SOCK_DGRAM
;
2908 #ifdef HAVE_SEQPACKET
2909 else if (EQ (tem
, Qseqpacket
))
2910 socktype
= SOCK_SEQPACKET
;
2913 error ("Unsupported connection type");
2916 tem
= Fplist_get (contact
, QCserver
);
2919 /* Don't support network sockets when non-blocking mode is
2920 not available, since a blocked Emacs is not useful. */
2921 #if !defined(O_NONBLOCK) && !defined(O_NDELAY)
2922 error ("Network servers not supported");
2926 backlog
= XINT (tem
);
2930 /* Make QCaddress an alias for :local (server) or :remote (client). */
2931 QCaddress
= is_server
? QClocal
: QCremote
;
2934 if (!is_server
&& socktype
!= SOCK_DGRAM
2935 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2937 #ifndef NON_BLOCKING_CONNECT
2938 error ("Non-blocking connect not supported");
2940 is_non_blocking_client
= 1;
2944 name
= Fplist_get (contact
, QCname
);
2945 buffer
= Fplist_get (contact
, QCbuffer
);
2946 filter
= Fplist_get (contact
, QCfilter
);
2947 sentinel
= Fplist_get (contact
, QCsentinel
);
2949 CHECK_STRING (name
);
2951 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2952 ai
.ai_socktype
= socktype
;
2957 /* :local ADDRESS or :remote ADDRESS */
2958 address
= Fplist_get (contact
, QCaddress
);
2959 if (!NILP (address
))
2961 host
= service
= Qnil
;
2963 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
2964 error ("Malformed :address");
2965 ai
.ai_family
= family
;
2966 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
2967 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
2971 /* :family FAMILY -- nil (for Inet), local, or integer. */
2972 tem
= Fplist_get (contact
, QCfamily
);
2975 #if defined(HAVE_GETADDRINFO) && defined(AF_INET6)
2981 #ifdef HAVE_LOCAL_SOCKETS
2982 else if (EQ (tem
, Qlocal
))
2986 else if (EQ (tem
, Qipv6
))
2989 else if (EQ (tem
, Qipv4
))
2991 else if (INTEGERP (tem
))
2992 family
= XINT (tem
);
2994 error ("Unknown address family");
2996 ai
.ai_family
= family
;
2998 /* :service SERVICE -- string, integer (port number), or t (random port). */
2999 service
= Fplist_get (contact
, QCservice
);
3001 /* :host HOST -- hostname, ip address, or 'local for localhost. */
3002 host
= Fplist_get (contact
, QChost
);
3005 if (EQ (host
, Qlocal
))
3006 /* Depending on setup, "localhost" may map to different IPv4 and/or
3007 IPv6 addresses, so it's better to be explicit. (Bug#6781) */
3008 host
= build_string ("127.0.0.1");
3009 CHECK_STRING (host
);
3012 #ifdef HAVE_LOCAL_SOCKETS
3013 if (family
== AF_LOCAL
)
3017 message (":family local ignores the :host \"%s\" property",
3019 contact
= Fplist_put (contact
, QChost
, Qnil
);
3022 CHECK_STRING (service
);
3023 memset (&address_un
, 0, sizeof address_un
);
3024 address_un
.sun_family
= AF_LOCAL
;
3025 strncpy (address_un
.sun_path
, SSDATA (service
), sizeof address_un
.sun_path
);
3026 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
3027 ai
.ai_addrlen
= sizeof address_un
;
3032 /* Slow down polling to every ten seconds.
3033 Some kernels have a bug which causes retrying connect to fail
3034 after a connect. Polling can interfere with gethostbyname too. */
3035 #ifdef POLL_FOR_INPUT
3036 if (socktype
!= SOCK_DGRAM
)
3038 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
3039 bind_polling_period (10);
3043 #ifdef HAVE_GETADDRINFO
3044 /* If we have a host, use getaddrinfo to resolve both host and service.
3045 Otherwise, use getservbyname to lookup the service. */
3049 /* SERVICE can either be a string or int.
3050 Convert to a C string for later use by getaddrinfo. */
3051 if (EQ (service
, Qt
))
3053 else if (INTEGERP (service
))
3055 sprintf (portbuf
, "%"pI
"d", XINT (service
));
3056 portstring
= portbuf
;
3060 CHECK_STRING (service
);
3061 portstring
= SSDATA (service
);
3066 memset (&hints
, 0, sizeof (hints
));
3068 hints
.ai_family
= family
;
3069 hints
.ai_socktype
= socktype
;
3070 hints
.ai_protocol
= 0;
3072 #ifdef HAVE_RES_INIT
3076 ret
= getaddrinfo (SSDATA (host
), portstring
, &hints
, &res
);
3078 #ifdef HAVE_GAI_STRERROR
3079 error ("%s/%s %s", SSDATA (host
), portstring
, gai_strerror (ret
));
3081 error ("%s/%s getaddrinfo error %d", SSDATA (host
), portstring
, ret
);
3087 #endif /* HAVE_GETADDRINFO */
3089 /* We end up here if getaddrinfo is not defined, or in case no hostname
3090 has been specified (e.g. for a local server process). */
3092 if (EQ (service
, Qt
))
3094 else if (INTEGERP (service
))
3095 port
= htons ((unsigned short) XINT (service
));
3098 struct servent
*svc_info
;
3099 CHECK_STRING (service
);
3100 svc_info
= getservbyname (SSDATA (service
),
3101 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3103 error ("Unknown service: %s", SDATA (service
));
3104 port
= svc_info
->s_port
;
3107 memset (&address_in
, 0, sizeof address_in
);
3108 address_in
.sin_family
= family
;
3109 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3110 address_in
.sin_port
= port
;
3112 #ifndef HAVE_GETADDRINFO
3115 struct hostent
*host_info_ptr
;
3117 /* gethostbyname may fail with TRY_AGAIN, but we don't honour that,
3118 as it may `hang' Emacs for a very long time. */
3122 #ifdef HAVE_RES_INIT
3126 host_info_ptr
= gethostbyname (SDATA (host
));
3131 memcpy (&address_in
.sin_addr
, host_info_ptr
->h_addr
,
3132 host_info_ptr
->h_length
);
3133 family
= host_info_ptr
->h_addrtype
;
3134 address_in
.sin_family
= family
;
3137 /* Attempt to interpret host as numeric inet address */
3139 unsigned long numeric_addr
;
3140 numeric_addr
= inet_addr (SSDATA (host
));
3141 if (numeric_addr
== -1)
3142 error ("Unknown host \"%s\"", SDATA (host
));
3144 memcpy (&address_in
.sin_addr
, &numeric_addr
,
3145 sizeof (address_in
.sin_addr
));
3149 #endif /* not HAVE_GETADDRINFO */
3151 ai
.ai_family
= family
;
3152 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3153 ai
.ai_addrlen
= sizeof address_in
;
3157 /* Do this in case we never enter the for-loop below. */
3158 count1
= SPECPDL_INDEX ();
3161 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3170 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3177 #ifdef DATAGRAM_SOCKETS
3178 if (!is_server
&& socktype
== SOCK_DGRAM
)
3180 #endif /* DATAGRAM_SOCKETS */
3182 #ifdef NON_BLOCKING_CONNECT
3183 if (is_non_blocking_client
)
3186 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3188 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3200 /* Make us close S if quit. */
3201 record_unwind_protect (close_file_unwind
, make_number (s
));
3203 /* Parse network options in the arg list.
3204 We simply ignore anything which isn't a known option (including other keywords).
3205 An error is signaled if setting a known option fails. */
3206 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3207 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3211 /* Configure as a server socket. */
3213 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3214 explicit :reuseaddr key to override this. */
3215 #ifdef HAVE_LOCAL_SOCKETS
3216 if (family
!= AF_LOCAL
)
3218 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3221 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3222 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3225 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3226 report_file_error ("Cannot bind server socket", Qnil
);
3228 #ifdef HAVE_GETSOCKNAME
3229 if (EQ (service
, Qt
))
3231 struct sockaddr_in sa1
;
3232 socklen_t len1
= sizeof (sa1
);
3233 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3235 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3236 service
= make_number (ntohs (sa1
.sin_port
));
3237 contact
= Fplist_put (contact
, QCservice
, service
);
3242 if (socktype
!= SOCK_DGRAM
&& listen (s
, backlog
))
3243 report_file_error ("Cannot listen on server socket", Qnil
);
3251 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3254 if (ret
== 0 || xerrno
== EISCONN
)
3256 /* The unwind-protect will be discarded afterwards.
3257 Likewise for immediate_quit. */
3261 #ifdef NON_BLOCKING_CONNECT
3263 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3267 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3274 if (xerrno
== EINTR
)
3276 /* Unlike most other syscalls connect() cannot be called
3277 again. (That would return EALREADY.) The proper way to
3278 wait for completion is select(). */
3286 sc
= select (s
+ 1, (SELECT_TYPE
*)0, &fdset
, (SELECT_TYPE
*)0,
3293 report_file_error ("select failed", Qnil
);
3297 len
= sizeof xerrno
;
3298 eassert (FD_ISSET (s
, &fdset
));
3299 if (getsockopt (s
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &len
) == -1)
3300 report_file_error ("getsockopt failed", Qnil
);
3302 errno
= xerrno
, report_file_error ("error during connect", Qnil
);
3306 #endif /* !WINDOWSNT */
3310 /* Discard the unwind protect closing S. */
3311 specpdl_ptr
= specpdl
+ count1
;
3316 if (xerrno
== EINTR
)
3323 #ifdef DATAGRAM_SOCKETS
3324 if (socktype
== SOCK_DGRAM
)
3326 if (datagram_address
[s
].sa
)
3328 datagram_address
[s
].sa
= (struct sockaddr
*) xmalloc (lres
->ai_addrlen
);
3329 datagram_address
[s
].len
= lres
->ai_addrlen
;
3333 memset (datagram_address
[s
].sa
, 0, lres
->ai_addrlen
);
3334 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3337 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3338 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3339 conv_lisp_to_sockaddr (rfamily
, remote
,
3340 datagram_address
[s
].sa
, rlen
);
3344 memcpy (datagram_address
[s
].sa
, lres
->ai_addr
, lres
->ai_addrlen
);
3347 contact
= Fplist_put (contact
, QCaddress
,
3348 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3349 #ifdef HAVE_GETSOCKNAME
3352 struct sockaddr_in sa1
;
3353 socklen_t len1
= sizeof (sa1
);
3354 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3355 contact
= Fplist_put (contact
, QClocal
,
3356 conv_sockaddr_to_lisp ((struct sockaddr
*)&sa1
, len1
));
3363 #ifdef HAVE_GETADDRINFO
3372 /* Discard the unwind protect for closing S, if any. */
3373 specpdl_ptr
= specpdl
+ count1
;
3375 /* Unwind bind_polling_period and request_sigio. */
3376 unbind_to (count
, Qnil
);
3380 /* If non-blocking got this far - and failed - assume non-blocking is
3381 not supported after all. This is probably a wrong assumption, but
3382 the normal blocking calls to open-network-stream handles this error
3384 if (is_non_blocking_client
)
3389 report_file_error ("make server process failed", contact
);
3391 report_file_error ("make client process failed", contact
);
3398 buffer
= Fget_buffer_create (buffer
);
3399 proc
= make_process (name
);
3401 chan_process
[inch
] = proc
;
3404 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3407 fcntl (inch
, F_SETFL
, O_NDELAY
);
3411 p
= XPROCESS (proc
);
3413 p
->childp
= contact
;
3414 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
3418 p
->sentinel
= sentinel
;
3420 p
->log
= Fplist_get (contact
, QClog
);
3421 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3422 p
->kill_without_query
= 1;
3423 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3428 if (is_server
&& socktype
!= SOCK_DGRAM
)
3429 p
->status
= Qlisten
;
3431 /* Make the process marker point into the process buffer (if any). */
3432 if (BUFFERP (buffer
))
3433 set_marker_both (p
->mark
, buffer
,
3434 BUF_ZV (XBUFFER (buffer
)),
3435 BUF_ZV_BYTE (XBUFFER (buffer
)));
3437 #ifdef NON_BLOCKING_CONNECT
3438 if (is_non_blocking_client
)
3440 /* We may get here if connect did succeed immediately. However,
3441 in that case, we still need to signal this like a non-blocking
3443 p
->status
= Qconnect
;
3444 if (!FD_ISSET (inch
, &connect_wait_mask
))
3446 FD_SET (inch
, &connect_wait_mask
);
3447 FD_SET (inch
, &write_mask
);
3448 num_pending_connects
++;
3453 /* A server may have a client filter setting of Qt, but it must
3454 still listen for incoming connects unless it is stopped. */
3455 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3456 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3458 FD_SET (inch
, &input_wait_mask
);
3459 FD_SET (inch
, &non_keyboard_wait_mask
);
3462 if (inch
> max_process_desc
)
3463 max_process_desc
= inch
;
3465 tem
= Fplist_member (contact
, QCcoding
);
3466 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3467 tem
= Qnil
; /* No error message (too late!). */
3470 /* Setup coding systems for communicating with the network stream. */
3471 struct gcpro inner_gcpro1
;
3472 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3473 Lisp_Object coding_systems
= Qt
;
3474 Lisp_Object fargs
[5], val
;
3478 val
= XCAR (XCDR (tem
));
3482 else if (!NILP (Vcoding_system_for_read
))
3483 val
= Vcoding_system_for_read
;
3484 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
3485 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
3486 /* We dare not decode end-of-line format by setting VAL to
3487 Qraw_text, because the existing Emacs Lisp libraries
3488 assume that they receive bare code including a sequene of
3493 if (NILP (host
) || NILP (service
))
3494 coding_systems
= Qnil
;
3497 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3498 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3499 GCPRO1_VAR (proc
, inner_gcpro
);
3500 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3501 UNGCPRO_VAR (inner_gcpro
);
3503 if (CONSP (coding_systems
))
3504 val
= XCAR (coding_systems
);
3505 else if (CONSP (Vdefault_process_coding_system
))
3506 val
= XCAR (Vdefault_process_coding_system
);
3510 p
->decode_coding_system
= val
;
3514 val
= XCAR (XCDR (tem
));
3518 else if (!NILP (Vcoding_system_for_write
))
3519 val
= Vcoding_system_for_write
;
3520 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3524 if (EQ (coding_systems
, Qt
))
3526 if (NILP (host
) || NILP (service
))
3527 coding_systems
= Qnil
;
3530 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3531 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3532 GCPRO1_VAR (proc
, inner_gcpro
);
3533 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3534 UNGCPRO_VAR (inner_gcpro
);
3537 if (CONSP (coding_systems
))
3538 val
= XCDR (coding_systems
);
3539 else if (CONSP (Vdefault_process_coding_system
))
3540 val
= XCDR (Vdefault_process_coding_system
);
3544 p
->encode_coding_system
= val
;
3546 setup_process_coding_systems (proc
);
3548 p
->decoding_buf
= empty_unibyte_string
;
3549 p
->decoding_carryover
= 0;
3550 p
->encoding_buf
= empty_unibyte_string
;
3552 p
->inherit_coding_system_flag
3553 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3560 #if defined(HAVE_NET_IF_H)
3563 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3564 doc
: /* Return an alist of all network interfaces and their network address.
3565 Each element is a cons, the car of which is a string containing the
3566 interface name, and the cdr is the network address in internal
3567 format; see the description of ADDRESS in `make-network-process'. */)
3570 struct ifconf ifconf
;
3571 struct ifreq
*ifreq
;
3573 int buf_size
= 512, s
, i
;
3576 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3582 buf
= xrealloc(buf
, buf_size
);
3589 ifconf
.ifc_buf
= buf
;
3590 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3597 if (ifconf
.ifc_len
== buf_size
)
3603 for (ifreq
= ifconf
.ifc_req
;
3604 (char *) ifreq
< (char *) (ifconf
.ifc_req
) + ifconf
.ifc_len
;
3607 struct ifreq
*ifq
= ifreq
;
3608 #ifdef HAVE_STRUCT_IFREQ_IFR_ADDR_SA_LEN
3609 #define SIZEOF_IFREQ(sif) \
3610 ((sif)->ifr_addr.sa_len < sizeof(struct sockaddr) ? \
3611 sizeof((*sif)) : sizeof ((sif)->ifr_name) + sif->ifr_addr.sa_len)
3613 int len
= SIZEOF_IFREQ (ifq
);
3615 int len
= sizeof (*ifreq
);
3617 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3619 ifreq
= (struct ifreq
*) ((char*) ifreq
+ len
);
3621 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3624 memcpy (namebuf
, ifq
->ifr_name
, sizeof (ifq
->ifr_name
));
3625 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3626 res
= Fcons (Fcons (build_string (namebuf
),
3627 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3628 sizeof (struct sockaddr
))),
3635 #endif /* SIOCGIFCONF */
3637 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
3641 const char *flag_sym
;
3644 static const struct ifflag_def ifflag_table
[] = {
3648 #ifdef IFF_BROADCAST
3649 { IFF_BROADCAST
, "broadcast" },
3652 { IFF_DEBUG
, "debug" },
3655 { IFF_LOOPBACK
, "loopback" },
3657 #ifdef IFF_POINTOPOINT
3658 { IFF_POINTOPOINT
, "pointopoint" },
3661 { IFF_RUNNING
, "running" },
3664 { IFF_NOARP
, "noarp" },
3667 { IFF_PROMISC
, "promisc" },
3669 #ifdef IFF_NOTRAILERS
3670 #ifdef NS_IMPL_COCOA
3671 /* Really means smart, notrailers is obsolete */
3672 { IFF_NOTRAILERS
, "smart" },
3674 { IFF_NOTRAILERS
, "notrailers" },
3678 { IFF_ALLMULTI
, "allmulti" },
3681 { IFF_MASTER
, "master" },
3684 { IFF_SLAVE
, "slave" },
3686 #ifdef IFF_MULTICAST
3687 { IFF_MULTICAST
, "multicast" },
3690 { IFF_PORTSEL
, "portsel" },
3692 #ifdef IFF_AUTOMEDIA
3693 { IFF_AUTOMEDIA
, "automedia" },
3696 { IFF_DYNAMIC
, "dynamic" },
3699 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3702 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3705 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3708 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3711 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3716 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3717 doc
: /* Return information about network interface named IFNAME.
3718 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3719 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3720 NETMASK is the layer 3 network mask, HWADDR is the layer 2 addres, and
3721 FLAGS is the current flags of the interface. */)
3722 (Lisp_Object ifname
)
3725 Lisp_Object res
= Qnil
;
3729 #if (! (defined SIOCGIFHWADDR && defined HAVE_STRUCT_IFREQ_IFR_HWADDR) \
3730 && defined HAVE_GETIFADDRS && defined LLADDR)
3731 struct ifaddrs
*ifap
;
3734 CHECK_STRING (ifname
);
3736 memset (rq
.ifr_name
, 0, sizeof rq
.ifr_name
);
3737 strncpy (rq
.ifr_name
, SSDATA (ifname
), sizeof (rq
.ifr_name
));
3739 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3744 #if defined(SIOCGIFFLAGS) && defined(HAVE_STRUCT_IFREQ_IFR_FLAGS)
3745 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3747 int flags
= rq
.ifr_flags
;
3748 const struct ifflag_def
*fp
;
3751 /* If flags is smaller than int (i.e. short) it may have the high bit set
3752 due to IFF_MULTICAST. In that case, sign extending it into
3754 if (flags
< 0 && sizeof (rq
.ifr_flags
) < sizeof (flags
))
3755 flags
= (unsigned short) rq
.ifr_flags
;
3758 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3760 if (flags
& fp
->flag_bit
)
3762 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3763 flags
-= fp
->flag_bit
;
3766 for (fnum
= 0; flags
&& fnum
< 32; flags
>>= 1, fnum
++)
3770 elt
= Fcons (make_number (fnum
), elt
);
3775 res
= Fcons (elt
, res
);
3778 #if defined(SIOCGIFHWADDR) && defined(HAVE_STRUCT_IFREQ_IFR_HWADDR)
3779 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3781 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3782 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3786 for (n
= 0; n
< 6; n
++)
3787 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3788 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3790 #elif defined(HAVE_GETIFADDRS) && defined(LLADDR)
3791 if (getifaddrs (&ifap
) != -1)
3793 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3794 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3797 for (it
= ifap
; it
!= NULL
; it
= it
->ifa_next
)
3799 struct sockaddr_dl
*sdl
= (struct sockaddr_dl
*) it
->ifa_addr
;
3800 unsigned char linkaddr
[6];
3803 if (it
->ifa_addr
->sa_family
!= AF_LINK
3804 || strcmp (it
->ifa_name
, SSDATA (ifname
)) != 0
3805 || sdl
->sdl_alen
!= 6)
3808 memcpy (linkaddr
, LLADDR(sdl
), sdl
->sdl_alen
);
3809 for (n
= 0; n
< 6; n
++)
3810 p
->contents
[n
] = make_number (linkaddr
[n
]);
3812 elt
= Fcons (make_number (it
->ifa_addr
->sa_family
), hwaddr
);
3816 #ifdef HAVE_FREEIFADDRS
3820 #endif /* HAVE_GETIFADDRS && LLADDR */
3822 res
= Fcons (elt
, res
);
3825 #if defined(SIOCGIFNETMASK) && (defined(HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined(HAVE_STRUCT_IFREQ_IFR_ADDR))
3826 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3829 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
3830 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3832 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3836 res
= Fcons (elt
, res
);
3839 #if defined(SIOCGIFBRDADDR) && defined(HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3840 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3843 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3846 res
= Fcons (elt
, res
);
3849 #if defined(SIOCGIFADDR) && defined(HAVE_STRUCT_IFREQ_IFR_ADDR)
3850 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3853 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3856 res
= Fcons (elt
, res
);
3860 return any
? res
: Qnil
;
3863 #endif /* defined(HAVE_NET_IF_H) */
3865 /* Turn off input and output for process PROC. */
3868 deactivate_process (Lisp_Object proc
)
3870 register int inchannel
, outchannel
;
3871 register struct Lisp_Process
*p
= XPROCESS (proc
);
3873 inchannel
= p
->infd
;
3874 outchannel
= p
->outfd
;
3876 #ifdef ADAPTIVE_READ_BUFFERING
3877 if (p
->read_output_delay
> 0)
3879 if (--process_output_delay_count
< 0)
3880 process_output_delay_count
= 0;
3881 p
->read_output_delay
= 0;
3882 p
->read_output_skip
= 0;
3888 /* Beware SIGCHLD hereabouts. */
3889 flush_pending_output (inchannel
);
3890 emacs_close (inchannel
);
3891 if (outchannel
>= 0 && outchannel
!= inchannel
)
3892 emacs_close (outchannel
);
3896 #ifdef DATAGRAM_SOCKETS
3897 if (DATAGRAM_CHAN_P (inchannel
))
3899 xfree (datagram_address
[inchannel
].sa
);
3900 datagram_address
[inchannel
].sa
= 0;
3901 datagram_address
[inchannel
].len
= 0;
3904 chan_process
[inchannel
] = Qnil
;
3905 FD_CLR (inchannel
, &input_wait_mask
);
3906 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3907 #ifdef NON_BLOCKING_CONNECT
3908 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3910 FD_CLR (inchannel
, &connect_wait_mask
);
3911 FD_CLR (inchannel
, &write_mask
);
3912 if (--num_pending_connects
< 0)
3916 if (inchannel
== max_process_desc
)
3919 /* We just closed the highest-numbered process input descriptor,
3920 so recompute the highest-numbered one now. */
3921 max_process_desc
= 0;
3922 for (i
= 0; i
< MAXDESC
; i
++)
3923 if (!NILP (chan_process
[i
]))
3924 max_process_desc
= i
;
3930 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3932 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3933 It is read into the process' buffers or given to their filter functions.
3934 Non-nil arg PROCESS means do not return until some output has been received
3937 Non-nil second arg SECONDS and third arg MILLISEC are number of seconds
3938 and milliseconds to wait; return after that much time whether or not
3939 there is any subprocess output. If SECONDS is a floating point number,
3940 it specifies a fractional number of seconds to wait.
3941 The MILLISEC argument is obsolete and should be avoided.
3943 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
3944 from PROCESS, suspending reading output from other processes.
3945 If JUST-THIS-ONE is an integer, don't run any timers either.
3946 Return non-nil if we received any output before the timeout expired. */)
3947 (register Lisp_Object process
, Lisp_Object seconds
, Lisp_Object millisec
, Lisp_Object just_this_one
)
3949 int secs
, usecs
= 0;
3951 if (! NILP (process
))
3952 CHECK_PROCESS (process
);
3954 just_this_one
= Qnil
;
3956 if (!NILP (millisec
))
3957 { /* Obsolete calling convention using integers rather than floats. */
3958 CHECK_NUMBER (millisec
);
3960 seconds
= make_float (XINT (millisec
) / 1000.0);
3963 CHECK_NUMBER (seconds
);
3964 seconds
= make_float (XINT (millisec
) / 1000.0 + XINT (seconds
));
3968 if (!NILP (seconds
))
3970 if (INTEGERP (seconds
))
3971 secs
= XINT (seconds
);
3972 else if (FLOATP (seconds
))
3974 double timeout
= XFLOAT_DATA (seconds
);
3975 secs
= (int) timeout
;
3976 usecs
= (int) ((timeout
- (double) secs
) * 1000000);
3979 wrong_type_argument (Qnumberp
, seconds
);
3981 if (secs
< 0 || (secs
== 0 && usecs
== 0))
3982 secs
= -1, usecs
= 0;
3985 secs
= NILP (process
) ? -1 : 0;
3988 (wait_reading_process_output (secs
, usecs
, 0, 0,
3990 !NILP (process
) ? XPROCESS (process
) : NULL
,
3991 NILP (just_this_one
) ? 0 :
3992 !INTEGERP (just_this_one
) ? 1 : -1)
3996 /* Accept a connection for server process SERVER on CHANNEL. */
3998 static int connect_counter
= 0;
4001 server_accept_connection (Lisp_Object server
, int channel
)
4003 Lisp_Object proc
, caller
, name
, buffer
;
4004 Lisp_Object contact
, host
, service
;
4005 struct Lisp_Process
*ps
= XPROCESS (server
);
4006 struct Lisp_Process
*p
;
4010 struct sockaddr_in in
;
4012 struct sockaddr_in6 in6
;
4014 #ifdef HAVE_LOCAL_SOCKETS
4015 struct sockaddr_un un
;
4018 socklen_t len
= sizeof saddr
;
4020 s
= accept (channel
, &saddr
.sa
, &len
);
4029 if (code
== EWOULDBLOCK
)
4033 if (!NILP (ps
->log
))
4034 call3 (ps
->log
, server
, Qnil
,
4035 concat3 (build_string ("accept failed with code"),
4036 Fnumber_to_string (make_number (code
)),
4037 build_string ("\n")));
4043 /* Setup a new process to handle the connection. */
4045 /* Generate a unique identification of the caller, and build contact
4046 information for this process. */
4049 switch (saddr
.sa
.sa_family
)
4053 Lisp_Object args
[5];
4054 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4055 args
[0] = build_string ("%d.%d.%d.%d");
4056 args
[1] = make_number (*ip
++);
4057 args
[2] = make_number (*ip
++);
4058 args
[3] = make_number (*ip
++);
4059 args
[4] = make_number (*ip
++);
4060 host
= Fformat (5, args
);
4061 service
= make_number (ntohs (saddr
.in
.sin_port
));
4063 args
[0] = build_string (" <%s:%d>");
4066 caller
= Fformat (3, args
);
4073 Lisp_Object args
[9];
4074 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4076 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4077 for (i
= 0; i
< 8; i
++)
4078 args
[i
+1] = make_number (ntohs (ip6
[i
]));
4079 host
= Fformat (9, args
);
4080 service
= make_number (ntohs (saddr
.in
.sin_port
));
4082 args
[0] = build_string (" <[%s]:%d>");
4085 caller
= Fformat (3, args
);
4090 #ifdef HAVE_LOCAL_SOCKETS
4094 caller
= Fnumber_to_string (make_number (connect_counter
));
4095 caller
= concat3 (build_string (" <"), caller
, build_string (">"));
4099 /* Create a new buffer name for this process if it doesn't have a
4100 filter. The new buffer name is based on the buffer name or
4101 process name of the server process concatenated with the caller
4104 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4108 buffer
= ps
->buffer
;
4110 buffer
= Fbuffer_name (buffer
);
4115 buffer
= concat2 (buffer
, caller
);
4116 buffer
= Fget_buffer_create (buffer
);
4120 /* Generate a unique name for the new server process. Combine the
4121 server process name with the caller identification. */
4123 name
= concat2 (ps
->name
, caller
);
4124 proc
= make_process (name
);
4126 chan_process
[s
] = proc
;
4129 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4132 fcntl (s
, F_SETFL
, O_NDELAY
);
4136 p
= XPROCESS (proc
);
4138 /* Build new contact information for this setup. */
4139 contact
= Fcopy_sequence (ps
->childp
);
4140 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4141 contact
= Fplist_put (contact
, QChost
, host
);
4142 if (!NILP (service
))
4143 contact
= Fplist_put (contact
, QCservice
, service
);
4144 contact
= Fplist_put (contact
, QCremote
,
4145 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4146 #ifdef HAVE_GETSOCKNAME
4148 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4149 contact
= Fplist_put (contact
, QClocal
,
4150 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4153 p
->childp
= contact
;
4154 p
->plist
= Fcopy_sequence (ps
->plist
);
4158 p
->sentinel
= ps
->sentinel
;
4159 p
->filter
= ps
->filter
;
4166 /* Client processes for accepted connections are not stopped initially. */
4167 if (!EQ (p
->filter
, Qt
))
4169 FD_SET (s
, &input_wait_mask
);
4170 FD_SET (s
, &non_keyboard_wait_mask
);
4173 if (s
> max_process_desc
)
4174 max_process_desc
= s
;
4176 /* Setup coding system for new process based on server process.
4177 This seems to be the proper thing to do, as the coding system
4178 of the new process should reflect the settings at the time the
4179 server socket was opened; not the current settings. */
4181 p
->decode_coding_system
= ps
->decode_coding_system
;
4182 p
->encode_coding_system
= ps
->encode_coding_system
;
4183 setup_process_coding_systems (proc
);
4185 p
->decoding_buf
= empty_unibyte_string
;
4186 p
->decoding_carryover
= 0;
4187 p
->encoding_buf
= empty_unibyte_string
;
4189 p
->inherit_coding_system_flag
4190 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4192 if (!NILP (ps
->log
))
4193 call3 (ps
->log
, server
, proc
,
4194 concat3 (build_string ("accept from "),
4195 (STRINGP (host
) ? host
: build_string ("-")),
4196 build_string ("\n")));
4198 if (!NILP (p
->sentinel
))
4199 exec_sentinel (proc
,
4200 concat3 (build_string ("open from "),
4201 (STRINGP (host
) ? host
: build_string ("-")),
4202 build_string ("\n")));
4205 /* This variable is different from waiting_for_input in keyboard.c.
4206 It is used to communicate to a lisp process-filter/sentinel (via the
4207 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4208 for user-input when that process-filter was called.
4209 waiting_for_input cannot be used as that is by definition 0 when
4210 lisp code is being evalled.
4211 This is also used in record_asynch_buffer_change.
4212 For that purpose, this must be 0
4213 when not inside wait_reading_process_output. */
4214 static int waiting_for_user_input_p
;
4217 wait_reading_process_output_unwind (Lisp_Object data
)
4219 waiting_for_user_input_p
= XINT (data
);
4223 /* This is here so breakpoints can be put on it. */
4225 wait_reading_process_output_1 (void)
4229 /* Use a wrapper around select to work around a bug in gdb 5.3.
4230 Normally, the wrapper is optimized away by inlining.
4232 If emacs is stopped inside select, the gdb backtrace doesn't
4233 show the function which called select, so it is practically
4234 impossible to step through wait_reading_process_output. */
4238 select_wrapper (int n
, fd_set
*rfd
, fd_set
*wfd
, fd_set
*xfd
, struct timeval
*tmo
)
4240 return select (n
, rfd
, wfd
, xfd
, tmo
);
4242 #define select select_wrapper
4245 /* Read and dispose of subprocess output while waiting for timeout to
4246 elapse and/or keyboard input to be available.
4249 timeout in seconds, or
4250 zero for no limit, or
4251 -1 means gobble data immediately available but don't wait for any.
4254 an additional duration to wait, measured in microseconds.
4255 If this is nonzero and time_limit is 0, then the timeout
4256 consists of MICROSECS only.
4258 READ_KBD is a lisp value:
4259 0 to ignore keyboard input, or
4260 1 to return when input is available, or
4261 -1 meaning caller will actually read the input, so don't throw to
4262 the quit handler, or
4264 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4265 output that arrives.
4267 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4268 (and gobble terminal input into the buffer if any arrives).
4270 If WAIT_PROC is specified, wait until something arrives from that
4271 process. The return value is true if we read some input from
4274 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4275 (suspending output from other processes). A negative value
4276 means don't run any timers either.
4278 If WAIT_PROC is specified, then the function returns true if we
4279 received input from that process before the timeout elapsed.
4280 Otherwise, return true if we received input from any process. */
4283 wait_reading_process_output (int time_limit
, int microsecs
, int read_kbd
,
4285 Lisp_Object wait_for_cell
,
4286 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
4288 register int channel
, nfds
;
4289 SELECT_TYPE Available
;
4290 SELECT_TYPE Writeok
;
4292 int check_delay
, no_avail
;
4295 EMACS_TIME timeout
, end_time
;
4296 int wait_channel
= -1;
4297 int got_some_input
= 0;
4298 int count
= SPECPDL_INDEX ();
4300 FD_ZERO (&Available
);
4303 if (time_limit
== 0 && microsecs
== 0 && wait_proc
&& !NILP (Vinhibit_quit
)
4304 && !(CONSP (wait_proc
->status
) && EQ (XCAR (wait_proc
->status
), Qexit
)))
4305 message ("Blocking call to accept-process-output with quit inhibited!!");
4307 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4308 if (wait_proc
!= NULL
)
4309 wait_channel
= wait_proc
->infd
;
4311 record_unwind_protect (wait_reading_process_output_unwind
,
4312 make_number (waiting_for_user_input_p
));
4313 waiting_for_user_input_p
= read_kbd
;
4315 /* Since we may need to wait several times,
4316 compute the absolute time to return at. */
4317 if (time_limit
|| microsecs
)
4319 EMACS_GET_TIME (end_time
);
4320 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
4321 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4326 int timeout_reduced_for_timers
= 0;
4328 /* If calling from keyboard input, do not quit
4329 since we want to return C-g as an input character.
4330 Otherwise, do pending quit if requested. */
4335 process_pending_signals ();
4338 /* Exit now if the cell we're waiting for became non-nil. */
4339 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4342 /* Compute time from now till when time limit is up */
4343 /* Exit if already run out */
4344 if (time_limit
== -1)
4346 /* -1 specified for timeout means
4347 gobble output available now
4348 but don't wait at all. */
4350 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4352 else if (time_limit
|| microsecs
)
4354 EMACS_GET_TIME (timeout
);
4355 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4356 if (EMACS_TIME_NEG_P (timeout
))
4361 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4364 /* Normally we run timers here.
4365 But not if wait_for_cell; in those cases,
4366 the wait is supposed to be short,
4367 and those callers cannot handle running arbitrary Lisp code here. */
4368 if (NILP (wait_for_cell
)
4369 && just_wait_proc
>= 0)
4371 EMACS_TIME timer_delay
;
4375 int old_timers_run
= timers_run
;
4376 struct buffer
*old_buffer
= current_buffer
;
4377 Lisp_Object old_window
= selected_window
;
4379 timer_delay
= timer_check ();
4381 /* If a timer has run, this might have changed buffers
4382 an alike. Make read_key_sequence aware of that. */
4383 if (timers_run
!= old_timers_run
4384 && (old_buffer
!= current_buffer
4385 || !EQ (old_window
, selected_window
))
4386 && waiting_for_user_input_p
== -1)
4387 record_asynch_buffer_change ();
4389 if (timers_run
!= old_timers_run
&& do_display
)
4390 /* We must retry, since a timer may have requeued itself
4391 and that could alter the time_delay. */
4392 redisplay_preserve_echo_area (9);
4396 while (!detect_input_pending ());
4398 /* If there is unread keyboard input, also return. */
4400 && requeued_events_pending_p ())
4403 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
4405 EMACS_TIME difference
;
4406 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
4407 if (EMACS_TIME_NEG_P (difference
))
4409 timeout
= timer_delay
;
4410 timeout_reduced_for_timers
= 1;
4413 /* If time_limit is -1, we are not going to wait at all. */
4414 else if (time_limit
!= -1)
4416 /* This is so a breakpoint can be put here. */
4417 wait_reading_process_output_1 ();
4421 /* Cause C-g and alarm signals to take immediate action,
4422 and cause input available signals to zero out timeout.
4424 It is important that we do this before checking for process
4425 activity. If we get a SIGCHLD after the explicit checks for
4426 process activity, timeout is the only way we will know. */
4428 set_waiting_for_input (&timeout
);
4430 /* If status of something has changed, and no input is
4431 available, notify the user of the change right away. After
4432 this explicit check, we'll let the SIGCHLD handler zap
4433 timeout to get our attention. */
4434 if (update_tick
!= process_tick
)
4439 if (kbd_on_hold_p ())
4442 Atemp
= input_wait_mask
;
4445 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4446 if ((select (max (max_process_desc
, max_input_desc
) + 1,
4448 #ifdef NON_BLOCKING_CONNECT
4449 (num_pending_connects
> 0 ? &Ctemp
: (SELECT_TYPE
*)0),
4453 (SELECT_TYPE
*)0, &timeout
)
4456 /* It's okay for us to do this and then continue with
4457 the loop, since timeout has already been zeroed out. */
4458 clear_waiting_for_input ();
4459 status_notify (NULL
);
4460 if (do_display
) redisplay_preserve_echo_area (13);
4464 /* Don't wait for output from a non-running process. Just
4465 read whatever data has already been received. */
4466 if (wait_proc
&& wait_proc
->raw_status_new
)
4467 update_status (wait_proc
);
4469 && ! EQ (wait_proc
->status
, Qrun
)
4470 && ! EQ (wait_proc
->status
, Qconnect
))
4472 int nread
, total_nread
= 0;
4474 clear_waiting_for_input ();
4475 XSETPROCESS (proc
, wait_proc
);
4477 /* Read data from the process, until we exhaust it. */
4478 while (wait_proc
->infd
>= 0)
4480 nread
= read_process_output (proc
, wait_proc
->infd
);
4487 total_nread
+= nread
;
4491 else if (nread
== -1 && EIO
== errno
)
4495 else if (nread
== -1 && EAGAIN
== errno
)
4499 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4503 if (total_nread
> 0 && do_display
)
4504 redisplay_preserve_echo_area (10);
4509 /* Wait till there is something to do */
4511 if (wait_proc
&& just_wait_proc
)
4513 if (wait_proc
->infd
< 0) /* Terminated */
4515 FD_SET (wait_proc
->infd
, &Available
);
4519 else if (!NILP (wait_for_cell
))
4521 Available
= non_process_wait_mask
;
4528 Available
= non_keyboard_wait_mask
;
4530 Available
= input_wait_mask
;
4531 Writeok
= write_mask
;
4532 #ifdef SELECT_CANT_DO_WRITE_MASK
4537 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4540 /* If frame size has changed or the window is newly mapped,
4541 redisplay now, before we start to wait. There is a race
4542 condition here; if a SIGIO arrives between now and the select
4543 and indicates that a frame is trashed, the select may block
4544 displaying a trashed screen. */
4545 if (frame_garbaged
&& do_display
)
4547 clear_waiting_for_input ();
4548 redisplay_preserve_echo_area (11);
4550 set_waiting_for_input (&timeout
);
4553 /* Skip the `select' call if input is available and we're
4554 waiting for keyboard input or a cell change (which can be
4555 triggered by processing X events). In the latter case, set
4556 nfds to 1 to avoid breaking the loop. */
4558 if ((read_kbd
|| !NILP (wait_for_cell
))
4559 && detect_input_pending ())
4561 nfds
= read_kbd
? 0 : 1;
4568 #ifdef ADAPTIVE_READ_BUFFERING
4569 /* Set the timeout for adaptive read buffering if any
4570 process has non-zero read_output_skip and non-zero
4571 read_output_delay, and we are not reading output for a
4572 specific wait_channel. It is not executed if
4573 Vprocess_adaptive_read_buffering is nil. */
4574 if (process_output_skip
&& check_delay
> 0)
4576 int usecs
= EMACS_USECS (timeout
);
4577 if (EMACS_SECS (timeout
) > 0 || usecs
> READ_OUTPUT_DELAY_MAX
)
4578 usecs
= READ_OUTPUT_DELAY_MAX
;
4579 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4581 proc
= chan_process
[channel
];
4584 /* Find minimum non-zero read_output_delay among the
4585 processes with non-zero read_output_skip. */
4586 if (XPROCESS (proc
)->read_output_delay
> 0)
4589 if (!XPROCESS (proc
)->read_output_skip
)
4591 FD_CLR (channel
, &Available
);
4592 XPROCESS (proc
)->read_output_skip
= 0;
4593 if (XPROCESS (proc
)->read_output_delay
< usecs
)
4594 usecs
= XPROCESS (proc
)->read_output_delay
;
4597 EMACS_SET_SECS_USECS (timeout
, 0, usecs
);
4598 process_output_skip
= 0;
4601 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
4603 #elif defined (HAVE_NS)
4608 (max (max_process_desc
, max_input_desc
) + 1,
4610 (check_write
? &Writeok
: (SELECT_TYPE
*)0),
4611 (SELECT_TYPE
*)0, &timeout
);
4614 /* GnuTLS buffers data internally. In lowat mode it leaves
4615 some data in the TCP buffers so that select works, but
4616 with custom pull/push functions we need to check if some
4617 data is available in the buffers manually. */
4619 wait_proc
&& wait_proc
->gnutls_p
/* Check for valid process. */
4620 /* Do we have pending data? */
4621 && emacs_gnutls_record_check_pending (wait_proc
->gnutls_state
) > 0)
4624 /* Set to Available. */
4625 FD_SET (wait_proc
->infd
, &Available
);
4632 /* Make C-g and alarm signals set flags again */
4633 clear_waiting_for_input ();
4635 /* If we woke up due to SIGWINCH, actually change size now. */
4636 do_pending_window_change (0);
4638 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
4639 /* We wanted the full specified time, so return now. */
4643 if (xerrno
== EINTR
)
4645 else if (xerrno
== EBADF
)
4648 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4649 the child's closure of the pts gives the parent a SIGHUP, and
4650 the ptc file descriptor is automatically closed,
4651 yielding EBADF here or at select() call above.
4652 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4653 in m/ibmrt-aix.h), and here we just ignore the select error.
4654 Cleanup occurs c/o status_notify after SIGCLD. */
4655 no_avail
= 1; /* Cannot depend on values returned */
4661 error ("select error: %s", emacs_strerror (xerrno
));
4666 FD_ZERO (&Available
);
4670 #if 0 /* When polling is used, interrupt_input is 0,
4671 so get_input_pending should read the input.
4672 So this should not be needed. */
4673 /* If we are using polling for input,
4674 and we see input available, make it get read now.
4675 Otherwise it might not actually get read for a second.
4676 And on hpux, since we turn off polling in wait_reading_process_output,
4677 it might never get read at all if we don't spend much time
4678 outside of wait_reading_process_output. */
4679 if (read_kbd
&& interrupt_input
4680 && keyboard_bit_set (&Available
)
4681 && input_polling_used ())
4682 kill (getpid (), SIGALRM
);
4685 /* Check for keyboard input */
4686 /* If there is any, return immediately
4687 to give it higher priority than subprocesses */
4691 int old_timers_run
= timers_run
;
4692 struct buffer
*old_buffer
= current_buffer
;
4693 Lisp_Object old_window
= selected_window
;
4696 if (detect_input_pending_run_timers (do_display
))
4698 swallow_events (do_display
);
4699 if (detect_input_pending_run_timers (do_display
))
4703 /* If a timer has run, this might have changed buffers
4704 an alike. Make read_key_sequence aware of that. */
4705 if (timers_run
!= old_timers_run
4706 && waiting_for_user_input_p
== -1
4707 && (old_buffer
!= current_buffer
4708 || !EQ (old_window
, selected_window
)))
4709 record_asynch_buffer_change ();
4715 /* If there is unread keyboard input, also return. */
4717 && requeued_events_pending_p ())
4720 /* If we are not checking for keyboard input now,
4721 do process events (but don't run any timers).
4722 This is so that X events will be processed.
4723 Otherwise they may have to wait until polling takes place.
4724 That would causes delays in pasting selections, for example.
4726 (We used to do this only if wait_for_cell.) */
4727 if (read_kbd
== 0 && detect_input_pending ())
4729 swallow_events (do_display
);
4730 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4731 if (detect_input_pending ())
4736 /* Exit now if the cell we're waiting for became non-nil. */
4737 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4741 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4742 go read it. This can happen with X on BSD after logging out.
4743 In that case, there really is no input and no SIGIO,
4744 but select says there is input. */
4746 if (read_kbd
&& interrupt_input
4747 && keyboard_bit_set (&Available
) && ! noninteractive
)
4748 kill (getpid (), SIGIO
);
4752 got_some_input
|= nfds
> 0;
4754 /* If checking input just got us a size-change event from X,
4755 obey it now if we should. */
4756 if (read_kbd
|| ! NILP (wait_for_cell
))
4757 do_pending_window_change (0);
4759 /* Check for data from a process. */
4760 if (no_avail
|| nfds
== 0)
4763 for (channel
= 0; channel
<= max_input_desc
; ++channel
)
4765 struct fd_callback_data
*d
= &fd_callback_info
[channel
];
4766 if (FD_ISSET (channel
, &Available
)
4768 && (d
->condition
& FOR_READ
) != 0)
4769 d
->func (channel
, d
->data
, 1);
4770 if (FD_ISSET (channel
, &write_mask
)
4772 && (d
->condition
& FOR_WRITE
) != 0)
4773 d
->func (channel
, d
->data
, 0);
4776 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4778 if (FD_ISSET (channel
, &Available
)
4779 && FD_ISSET (channel
, &non_keyboard_wait_mask
)
4780 && !FD_ISSET (channel
, &non_process_wait_mask
))
4784 /* If waiting for this channel, arrange to return as
4785 soon as no more input to be processed. No more
4787 if (wait_channel
== channel
)
4793 proc
= chan_process
[channel
];
4797 /* If this is a server stream socket, accept connection. */
4798 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4800 server_accept_connection (proc
, channel
);
4804 /* Read data from the process, starting with our
4805 buffered-ahead character if we have one. */
4807 nread
= read_process_output (proc
, channel
);
4810 /* Since read_process_output can run a filter,
4811 which can call accept-process-output,
4812 don't try to read from any other processes
4813 before doing the select again. */
4814 FD_ZERO (&Available
);
4817 redisplay_preserve_echo_area (12);
4820 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4823 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4824 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4826 else if (nread
== -1 && errno
== EAGAIN
)
4830 else if (nread
== -1 && errno
== EAGAIN
)
4832 /* Note that we cannot distinguish between no input
4833 available now and a closed pipe.
4834 With luck, a closed pipe will be accompanied by
4835 subprocess termination and SIGCHLD. */
4836 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4838 #endif /* O_NDELAY */
4839 #endif /* O_NONBLOCK */
4841 /* On some OSs with ptys, when the process on one end of
4842 a pty exits, the other end gets an error reading with
4843 errno = EIO instead of getting an EOF (0 bytes read).
4844 Therefore, if we get an error reading and errno =
4845 EIO, just continue, because the child process has
4846 exited and should clean itself up soon (e.g. when we
4849 However, it has been known to happen that the SIGCHLD
4850 got lost. So raise the signal again just in case.
4852 else if (nread
== -1 && errno
== EIO
)
4854 /* Clear the descriptor now, so we only raise the
4855 signal once. Don't do this if `process' is only
4857 if (XPROCESS (proc
)->pid
!= -2)
4859 FD_CLR (channel
, &input_wait_mask
);
4860 FD_CLR (channel
, &non_keyboard_wait_mask
);
4862 kill (getpid (), SIGCHLD
);
4865 #endif /* HAVE_PTYS */
4866 /* If we can detect process termination, don't consider the process
4867 gone just because its pipe is closed. */
4869 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4874 /* Preserve status of processes already terminated. */
4875 XPROCESS (proc
)->tick
= ++process_tick
;
4876 deactivate_process (proc
);
4877 if (XPROCESS (proc
)->raw_status_new
)
4878 update_status (XPROCESS (proc
));
4879 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4880 XPROCESS (proc
)->status
4881 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
4884 #ifdef NON_BLOCKING_CONNECT
4885 if (FD_ISSET (channel
, &Writeok
)
4886 && FD_ISSET (channel
, &connect_wait_mask
))
4888 struct Lisp_Process
*p
;
4890 FD_CLR (channel
, &connect_wait_mask
);
4891 FD_CLR (channel
, &write_mask
);
4892 if (--num_pending_connects
< 0)
4895 proc
= chan_process
[channel
];
4899 p
= XPROCESS (proc
);
4902 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4903 So only use it on systems where it is known to work. */
4905 socklen_t xlen
= sizeof (xerrno
);
4906 if (getsockopt (channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4911 struct sockaddr pname
;
4912 int pnamelen
= sizeof (pname
);
4914 /* If connection failed, getpeername will fail. */
4916 if (getpeername (channel
, &pname
, &pnamelen
) < 0)
4918 /* Obtain connect failure code through error slippage. */
4921 if (errno
== ENOTCONN
&& read (channel
, &dummy
, 1) < 0)
4928 p
->tick
= ++process_tick
;
4929 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
4930 deactivate_process (proc
);
4935 /* Execute the sentinel here. If we had relied on
4936 status_notify to do it later, it will read input
4937 from the process before calling the sentinel. */
4938 exec_sentinel (proc
, build_string ("open\n"));
4939 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4941 FD_SET (p
->infd
, &input_wait_mask
);
4942 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
4946 #endif /* NON_BLOCKING_CONNECT */
4947 } /* end for each file descriptor */
4948 } /* end while exit conditions not met */
4950 unbind_to (count
, Qnil
);
4952 /* If calling from keyboard input, do not quit
4953 since we want to return C-g as an input character.
4954 Otherwise, do pending quit if requested. */
4957 /* Prevent input_pending from remaining set if we quit. */
4958 clear_input_pending ();
4962 return got_some_input
;
4965 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
4968 read_process_output_call (Lisp_Object fun_and_args
)
4970 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
4974 read_process_output_error_handler (Lisp_Object error_val
)
4976 cmd_error_internal (error_val
, "error in process filter: ");
4978 update_echo_area ();
4979 Fsleep_for (make_number (2), Qnil
);
4983 /* Read pending output from the process channel,
4984 starting with our buffered-ahead character if we have one.
4985 Yield number of decoded characters read.
4987 This function reads at most 4096 characters.
4988 If you want to read all available subprocess output,
4989 you must call it repeatedly until it returns zero.
4991 The characters read are decoded according to PROC's coding-system
4995 read_process_output (Lisp_Object proc
, register int channel
)
4997 register ssize_t nbytes
;
4999 register Lisp_Object outstream
;
5000 register struct Lisp_Process
*p
= XPROCESS (proc
);
5001 register EMACS_INT opoint
;
5002 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5003 int carryover
= p
->decoding_carryover
;
5005 int count
= SPECPDL_INDEX ();
5006 Lisp_Object odeactivate
;
5008 chars
= (char *) alloca (carryover
+ readmax
);
5010 /* See the comment above. */
5011 memcpy (chars
, SDATA (p
->decoding_buf
), carryover
);
5013 #ifdef DATAGRAM_SOCKETS
5014 /* We have a working select, so proc_buffered_char is always -1. */
5015 if (DATAGRAM_CHAN_P (channel
))
5017 socklen_t len
= datagram_address
[channel
].len
;
5018 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5019 0, datagram_address
[channel
].sa
, &len
);
5024 int buffered
= 0 <= proc_buffered_char
[channel
];
5027 chars
[carryover
] = proc_buffered_char
[channel
];
5028 proc_buffered_char
[channel
] = -1;
5031 if (XPROCESS (proc
)->gnutls_p
)
5032 nbytes
= emacs_gnutls_read (XPROCESS (proc
),
5033 chars
+ carryover
+ buffered
,
5034 readmax
- buffered
);
5037 nbytes
= emacs_read (channel
, chars
+ carryover
+ buffered
,
5038 readmax
- buffered
);
5039 #ifdef ADAPTIVE_READ_BUFFERING
5040 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5042 int delay
= p
->read_output_delay
;
5045 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5048 process_output_delay_count
++;
5049 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5052 else if (delay
> 0 && nbytes
== readmax
- buffered
)
5054 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5056 process_output_delay_count
--;
5058 p
->read_output_delay
= delay
;
5061 p
->read_output_skip
= 1;
5062 process_output_skip
= 1;
5067 nbytes
+= buffered
&& nbytes
<= 0;
5070 p
->decoding_carryover
= 0;
5072 /* At this point, NBYTES holds number of bytes just received
5073 (including the one in proc_buffered_char[channel]). */
5076 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5078 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5081 /* Now set NBYTES how many bytes we must decode. */
5082 nbytes
+= carryover
;
5084 odeactivate
= Vdeactivate_mark
;
5085 /* There's no good reason to let process filters change the current
5086 buffer, and many callers of accept-process-output, sit-for, and
5087 friends don't expect current-buffer to be changed from under them. */
5088 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
5090 /* Read and dispose of the process output. */
5091 outstream
= p
->filter
;
5092 if (!NILP (outstream
))
5095 int outer_running_asynch_code
= running_asynch_code
;
5096 int waiting
= waiting_for_user_input_p
;
5098 /* No need to gcpro these, because all we do with them later
5099 is test them for EQness, and none of them should be a string. */
5101 Lisp_Object obuffer
, okeymap
;
5102 XSETBUFFER (obuffer
, current_buffer
);
5103 okeymap
= BVAR (current_buffer
, keymap
);
5106 /* We inhibit quit here instead of just catching it so that
5107 hitting ^G when a filter happens to be running won't screw
5109 specbind (Qinhibit_quit
, Qt
);
5110 specbind (Qlast_nonmenu_event
, Qt
);
5112 /* In case we get recursively called,
5113 and we already saved the match data nonrecursively,
5114 save the same match data in safely recursive fashion. */
5115 if (outer_running_asynch_code
)
5118 /* Don't clobber the CURRENT match data, either! */
5119 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5120 restore_search_regs ();
5121 record_unwind_save_match_data ();
5122 Fset_match_data (tem
, Qt
);
5125 /* For speed, if a search happens within this code,
5126 save the match data in a special nonrecursive fashion. */
5127 running_asynch_code
= 1;
5129 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5130 text
= coding
->dst_object
;
5131 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5132 /* A new coding system might be found. */
5133 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5135 p
->decode_coding_system
= Vlast_coding_system_used
;
5137 /* Don't call setup_coding_system for
5138 proc_decode_coding_system[channel] here. It is done in
5139 detect_coding called via decode_coding above. */
5141 /* If a coding system for encoding is not yet decided, we set
5142 it as the same as coding-system for decoding.
5144 But, before doing that we must check if
5145 proc_encode_coding_system[p->outfd] surely points to a
5146 valid memory because p->outfd will be changed once EOF is
5147 sent to the process. */
5148 if (NILP (p
->encode_coding_system
)
5149 && proc_encode_coding_system
[p
->outfd
])
5151 p
->encode_coding_system
5152 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5153 setup_coding_system (p
->encode_coding_system
,
5154 proc_encode_coding_system
[p
->outfd
]);
5158 if (coding
->carryover_bytes
> 0)
5160 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5161 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5162 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5163 coding
->carryover_bytes
);
5164 p
->decoding_carryover
= coding
->carryover_bytes
;
5166 if (SBYTES (text
) > 0)
5167 internal_condition_case_1 (read_process_output_call
,
5169 Fcons (proc
, Fcons (text
, Qnil
))),
5170 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5171 read_process_output_error_handler
);
5173 /* If we saved the match data nonrecursively, restore it now. */
5174 restore_search_regs ();
5175 running_asynch_code
= outer_running_asynch_code
;
5177 /* Restore waiting_for_user_input_p as it was
5178 when we were called, in case the filter clobbered it. */
5179 waiting_for_user_input_p
= waiting
;
5181 #if 0 /* Call record_asynch_buffer_change unconditionally,
5182 because we might have changed minor modes or other things
5183 that affect key bindings. */
5184 if (! EQ (Fcurrent_buffer (), obuffer
)
5185 || ! EQ (current_buffer
->keymap
, okeymap
))
5187 /* But do it only if the caller is actually going to read events.
5188 Otherwise there's no need to make him wake up, and it could
5189 cause trouble (for example it would make sit_for return). */
5190 if (waiting_for_user_input_p
== -1)
5191 record_asynch_buffer_change ();
5194 /* If no filter, write into buffer if it isn't dead. */
5195 else if (!NILP (p
->buffer
) && !NILP (BVAR (XBUFFER (p
->buffer
), name
)))
5197 Lisp_Object old_read_only
;
5198 EMACS_INT old_begv
, old_zv
;
5199 EMACS_INT old_begv_byte
, old_zv_byte
;
5200 EMACS_INT before
, before_byte
;
5201 EMACS_INT opoint_byte
;
5205 Fset_buffer (p
->buffer
);
5207 opoint_byte
= PT_BYTE
;
5208 old_read_only
= BVAR (current_buffer
, read_only
);
5211 old_begv_byte
= BEGV_BYTE
;
5212 old_zv_byte
= ZV_BYTE
;
5214 BVAR (current_buffer
, read_only
) = Qnil
;
5216 /* Insert new output into buffer
5217 at the current end-of-output marker,
5218 thus preserving logical ordering of input and output. */
5219 if (XMARKER (p
->mark
)->buffer
)
5220 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
5221 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
5224 SET_PT_BOTH (ZV
, ZV_BYTE
);
5226 before_byte
= PT_BYTE
;
5228 /* If the output marker is outside of the visible region, save
5229 the restriction and widen. */
5230 if (! (BEGV
<= PT
&& PT
<= ZV
))
5233 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5234 text
= coding
->dst_object
;
5235 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5236 /* A new coding system might be found. See the comment in the
5237 similar code in the previous `if' block. */
5238 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5240 p
->decode_coding_system
= Vlast_coding_system_used
;
5241 if (NILP (p
->encode_coding_system
)
5242 && proc_encode_coding_system
[p
->outfd
])
5244 p
->encode_coding_system
5245 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5246 setup_coding_system (p
->encode_coding_system
,
5247 proc_encode_coding_system
[p
->outfd
]);
5250 if (coding
->carryover_bytes
> 0)
5252 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5253 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5254 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5255 coding
->carryover_bytes
);
5256 p
->decoding_carryover
= coding
->carryover_bytes
;
5258 /* Adjust the multibyteness of TEXT to that of the buffer. */
5259 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
5260 != ! STRING_MULTIBYTE (text
))
5261 text
= (STRING_MULTIBYTE (text
)
5262 ? Fstring_as_unibyte (text
)
5263 : Fstring_to_multibyte (text
));
5264 /* Insert before markers in case we are inserting where
5265 the buffer's mark is, and the user's next command is Meta-y. */
5266 insert_from_string_before_markers (text
, 0, 0,
5267 SCHARS (text
), SBYTES (text
), 0);
5269 /* Make sure the process marker's position is valid when the
5270 process buffer is changed in the signal_after_change above.
5271 W3 is known to do that. */
5272 if (BUFFERP (p
->buffer
)
5273 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5274 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5276 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5278 update_mode_lines
++;
5280 /* Make sure opoint and the old restrictions
5281 float ahead of any new text just as point would. */
5282 if (opoint
>= before
)
5284 opoint
+= PT
- before
;
5285 opoint_byte
+= PT_BYTE
- before_byte
;
5287 if (old_begv
> before
)
5289 old_begv
+= PT
- before
;
5290 old_begv_byte
+= PT_BYTE
- before_byte
;
5292 if (old_zv
>= before
)
5294 old_zv
+= PT
- before
;
5295 old_zv_byte
+= PT_BYTE
- before_byte
;
5298 /* If the restriction isn't what it should be, set it. */
5299 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5300 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5303 BVAR (current_buffer
, read_only
) = old_read_only
;
5304 SET_PT_BOTH (opoint
, opoint_byte
);
5306 /* Handling the process output should not deactivate the mark. */
5307 Vdeactivate_mark
= odeactivate
;
5309 unbind_to (count
, Qnil
);
5313 /* Sending data to subprocess */
5315 static jmp_buf send_process_frame
;
5316 static Lisp_Object process_sent_to
;
5318 #ifndef FORWARD_SIGNAL_TO_MAIN_THREAD
5319 static void send_process_trap (int) NO_RETURN
;
5323 send_process_trap (int ignore
)
5325 SIGNAL_THREAD_CHECK (SIGPIPE
);
5326 sigunblock (sigmask (SIGPIPE
));
5327 longjmp (send_process_frame
, 1);
5330 /* Send some data to process PROC.
5331 BUF is the beginning of the data; LEN is the number of characters.
5332 OBJECT is the Lisp object that the data comes from. If OBJECT is
5333 nil or t, it means that the data comes from C string.
5335 If OBJECT is not nil, the data is encoded by PROC's coding-system
5336 for encoding before it is sent.
5338 This function can evaluate Lisp code and can garbage collect. */
5341 send_process (volatile Lisp_Object proc
, const char *volatile buf
,
5342 volatile EMACS_INT len
, volatile Lisp_Object object
)
5344 /* Use volatile to protect variables from being clobbered by longjmp. */
5345 struct Lisp_Process
*p
= XPROCESS (proc
);
5347 struct coding_system
*coding
;
5348 struct gcpro gcpro1
;
5349 void (*volatile old_sigpipe
) (int);
5353 if (p
->raw_status_new
)
5355 if (! EQ (p
->status
, Qrun
))
5356 error ("Process %s not running", SDATA (p
->name
));
5358 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5360 coding
= proc_encode_coding_system
[p
->outfd
];
5361 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5363 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5364 || (BUFFERP (object
)
5365 && !NILP (BVAR (XBUFFER (object
), enable_multibyte_characters
)))
5368 p
->encode_coding_system
5369 = complement_process_encoding_system (p
->encode_coding_system
);
5370 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
5372 /* The coding system for encoding was changed to raw-text
5373 because we sent a unibyte text previously. Now we are
5374 sending a multibyte text, thus we must encode it by the
5375 original coding system specified for the current process.
5377 Another reason we comming here is that the coding system
5378 was just complemented and new one was returned by
5379 complement_process_encoding_system. */
5380 setup_coding_system (p
->encode_coding_system
, coding
);
5381 Vlast_coding_system_used
= p
->encode_coding_system
;
5383 coding
->src_multibyte
= 1;
5387 /* For sending a unibyte text, character code conversion should
5388 not take place but EOL conversion should. So, setup raw-text
5389 or one of the subsidiary if we have not yet done it. */
5390 if (CODING_REQUIRE_ENCODING (coding
))
5392 if (CODING_REQUIRE_FLUSHING (coding
))
5394 /* But, before changing the coding, we must flush out data. */
5395 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5396 send_process (proc
, "", 0, Qt
);
5397 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
5399 setup_coding_system (raw_text_coding_system
5400 (Vlast_coding_system_used
),
5402 coding
->src_multibyte
= 0;
5405 coding
->dst_multibyte
= 0;
5407 if (CODING_REQUIRE_ENCODING (coding
))
5409 coding
->dst_object
= Qt
;
5410 if (BUFFERP (object
))
5412 EMACS_INT from_byte
, from
, to
;
5413 EMACS_INT save_pt
, save_pt_byte
;
5414 struct buffer
*cur
= current_buffer
;
5416 set_buffer_internal (XBUFFER (object
));
5417 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
5419 from_byte
= PTR_BYTE_POS ((unsigned char *) buf
);
5420 from
= BYTE_TO_CHAR (from_byte
);
5421 to
= BYTE_TO_CHAR (from_byte
+ len
);
5422 TEMP_SET_PT_BOTH (from
, from_byte
);
5423 encode_coding_object (coding
, object
, from
, from_byte
,
5424 to
, from_byte
+ len
, Qt
);
5425 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
5426 set_buffer_internal (cur
);
5428 else if (STRINGP (object
))
5430 encode_coding_object (coding
, object
, 0, 0, SCHARS (object
),
5431 SBYTES (object
), Qt
);
5435 coding
->dst_object
= make_unibyte_string (buf
, len
);
5436 coding
->produced
= len
;
5439 len
= coding
->produced
;
5440 object
= coding
->dst_object
;
5441 buf
= SSDATA (object
);
5444 if (pty_max_bytes
== 0)
5446 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5447 pty_max_bytes
= fpathconf (p
->outfd
, _PC_MAX_CANON
);
5448 if (pty_max_bytes
< 0)
5449 pty_max_bytes
= 250;
5451 pty_max_bytes
= 250;
5453 /* Deduct one, to leave space for the eof. */
5457 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
5458 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
5459 when returning with longjmp despite being declared volatile. */
5460 if (!setjmp (send_process_frame
))
5462 p
= XPROCESS (proc
); /* Repair any setjmp clobbering. */
5464 process_sent_to
= proc
;
5467 EMACS_INT
this = len
;
5469 /* Send this batch, using one or more write calls. */
5472 EMACS_INT written
= 0;
5473 int outfd
= p
->outfd
;
5474 old_sigpipe
= (void (*) (int)) signal (SIGPIPE
, send_process_trap
);
5475 #ifdef DATAGRAM_SOCKETS
5476 if (DATAGRAM_CHAN_P (outfd
))
5478 rv
= sendto (outfd
, buf
, this,
5479 0, datagram_address
[outfd
].sa
,
5480 datagram_address
[outfd
].len
);
5483 else if (errno
== EMSGSIZE
)
5485 signal (SIGPIPE
, old_sigpipe
);
5486 report_file_error ("sending datagram",
5487 Fcons (proc
, Qnil
));
5494 if (XPROCESS (proc
)->gnutls_p
)
5495 written
= emacs_gnutls_write (XPROCESS (proc
),
5499 written
= emacs_write (outfd
, buf
, this);
5500 rv
= (written
? 0 : -1);
5501 #ifdef ADAPTIVE_READ_BUFFERING
5502 if (p
->read_output_delay
> 0
5503 && p
->adaptive_read_buffering
== 1)
5505 p
->read_output_delay
= 0;
5506 process_output_delay_count
--;
5507 p
->read_output_skip
= 0;
5511 signal (SIGPIPE
, old_sigpipe
);
5517 || errno
== EWOULDBLOCK
5523 /* Buffer is full. Wait, accepting input;
5524 that may allow the program
5525 to finish doing output and read more. */
5527 EMACS_INT offset
= 0;
5529 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5530 /* A gross hack to work around a bug in FreeBSD.
5531 In the following sequence, read(2) returns
5535 write(2) 954 bytes, get EAGAIN
5536 read(2) 1024 bytes in process_read_output
5537 read(2) 11 bytes in process_read_output
5539 That is, read(2) returns more bytes than have
5540 ever been written successfully. The 1033 bytes
5541 read are the 1022 bytes written successfully
5542 after processing (for example with CRs added if
5543 the terminal is set up that way which it is
5544 here). The same bytes will be seen again in a
5545 later read(2), without the CRs. */
5547 if (errno
== EAGAIN
)
5550 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5552 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5554 /* Running filters might relocate buffers or strings.
5555 Arrange to relocate BUF. */
5556 if (BUFFERP (object
))
5557 offset
= BUF_PTR_BYTE_POS (XBUFFER (object
),
5558 (unsigned char *) buf
);
5559 else if (STRINGP (object
))
5560 offset
= buf
- SSDATA (object
);
5562 #ifdef EMACS_HAS_USECS
5563 wait_reading_process_output (0, 20000, 0, 0, Qnil
, NULL
, 0);
5565 wait_reading_process_output (1, 0, 0, 0, Qnil
, NULL
, 0);
5568 if (BUFFERP (object
))
5569 buf
= (char *) BUF_BYTE_ADDRESS (XBUFFER (object
),
5571 else if (STRINGP (object
))
5572 buf
= offset
+ SSDATA (object
);
5575 /* This is a real error. */
5576 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5586 signal (SIGPIPE
, old_sigpipe
);
5587 proc
= process_sent_to
;
5588 p
= XPROCESS (proc
);
5589 p
->raw_status_new
= 0;
5590 p
->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5591 p
->tick
= ++process_tick
;
5592 deactivate_process (proc
);
5593 error ("SIGPIPE raised on process %s; closed it", SDATA (p
->name
));
5599 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5601 doc
: /* Send current contents of region as input to PROCESS.
5602 PROCESS may be a process, a buffer, the name of a process or buffer, or
5603 nil, indicating the current buffer's process.
5604 Called from program, takes three arguments, PROCESS, START and END.
5605 If the region is more than 500 characters long,
5606 it is sent in several bunches. This may happen even for shorter regions.
5607 Output from processes can arrive in between bunches. */)
5608 (Lisp_Object process
, Lisp_Object start
, Lisp_Object end
)
5611 EMACS_INT start1
, end1
;
5613 proc
= get_process (process
);
5614 validate_region (&start
, &end
);
5616 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5617 move_gap (XINT (start
));
5619 start1
= CHAR_TO_BYTE (XINT (start
));
5620 end1
= CHAR_TO_BYTE (XINT (end
));
5621 send_process (proc
, (char *) BYTE_POS_ADDR (start1
), end1
- start1
,
5622 Fcurrent_buffer ());
5627 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5629 doc
: /* Send PROCESS the contents of STRING as input.
5630 PROCESS may be a process, a buffer, the name of a process or buffer, or
5631 nil, indicating the current buffer's process.
5632 If STRING is more than 500 characters long,
5633 it is sent in several bunches. This may happen even for shorter strings.
5634 Output from processes can arrive in between bunches. */)
5635 (Lisp_Object process
, Lisp_Object string
)
5638 CHECK_STRING (string
);
5639 proc
= get_process (process
);
5640 send_process (proc
, SSDATA (string
),
5641 SBYTES (string
), string
);
5645 /* Return the foreground process group for the tty/pty that
5646 the process P uses. */
5648 emacs_get_tty_pgrp (struct Lisp_Process
*p
)
5653 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5656 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5657 master side. Try the slave side. */
5658 fd
= emacs_open (SSDATA (p
->tty_name
), O_RDONLY
, 0);
5662 ioctl (fd
, TIOCGPGRP
, &gid
);
5666 #endif /* defined (TIOCGPGRP ) */
5671 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5672 Sprocess_running_child_p
, 0, 1, 0,
5673 doc
: /* Return t if PROCESS has given the terminal to a child.
5674 If the operating system does not make it possible to find out,
5675 return t unconditionally. */)
5676 (Lisp_Object process
)
5678 /* Initialize in case ioctl doesn't exist or gives an error,
5679 in a way that will cause returning t. */
5682 struct Lisp_Process
*p
;
5684 proc
= get_process (process
);
5685 p
= XPROCESS (proc
);
5687 if (!EQ (p
->type
, Qreal
))
5688 error ("Process %s is not a subprocess",
5691 error ("Process %s is not active",
5694 gid
= emacs_get_tty_pgrp (p
);
5701 /* send a signal number SIGNO to PROCESS.
5702 If CURRENT_GROUP is t, that means send to the process group
5703 that currently owns the terminal being used to communicate with PROCESS.
5704 This is used for various commands in shell mode.
5705 If CURRENT_GROUP is lambda, that means send to the process group
5706 that currently owns the terminal, but only if it is NOT the shell itself.
5708 If NOMSG is zero, insert signal-announcements into process's buffers
5711 If we can, we try to signal PROCESS by sending control characters
5712 down the pty. This allows us to signal inferiors who have changed
5713 their uid, for which killpg would return an EPERM error. */
5716 process_send_signal (Lisp_Object process
, int signo
, Lisp_Object current_group
,
5720 register struct Lisp_Process
*p
;
5724 proc
= get_process (process
);
5725 p
= XPROCESS (proc
);
5727 if (!EQ (p
->type
, Qreal
))
5728 error ("Process %s is not a subprocess",
5731 error ("Process %s is not active",
5735 current_group
= Qnil
;
5737 /* If we are using pgrps, get a pgrp number and make it negative. */
5738 if (NILP (current_group
))
5739 /* Send the signal to the shell's process group. */
5743 #ifdef SIGNALS_VIA_CHARACTERS
5744 /* If possible, send signals to the entire pgrp
5745 by sending an input character to it. */
5748 cc_t
*sig_char
= NULL
;
5750 tcgetattr (p
->infd
, &t
);
5755 sig_char
= &t
.c_cc
[VINTR
];
5759 sig_char
= &t
.c_cc
[VQUIT
];
5763 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5764 sig_char
= &t
.c_cc
[VSWTCH
];
5766 sig_char
= &t
.c_cc
[VSUSP
];
5771 if (sig_char
&& *sig_char
!= CDISABLE
)
5773 send_process (proc
, (char *) sig_char
, 1, Qnil
);
5776 /* If we can't send the signal with a character,
5777 fall through and send it another way. */
5779 /* The code above may fall through if it can't
5780 handle the signal. */
5781 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5784 /* Get the current pgrp using the tty itself, if we have that.
5785 Otherwise, use the pty to get the pgrp.
5786 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5787 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5788 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5789 His patch indicates that if TIOCGPGRP returns an error, then
5790 we should just assume that p->pid is also the process group id. */
5792 gid
= emacs_get_tty_pgrp (p
);
5795 /* If we can't get the information, assume
5796 the shell owns the tty. */
5799 /* It is not clear whether anything really can set GID to -1.
5800 Perhaps on some system one of those ioctls can or could do so.
5801 Or perhaps this is vestigial. */
5804 #else /* ! defined (TIOCGPGRP ) */
5805 /* Can't select pgrps on this system, so we know that
5806 the child itself heads the pgrp. */
5808 #endif /* ! defined (TIOCGPGRP ) */
5810 /* If current_group is lambda, and the shell owns the terminal,
5811 don't send any signal. */
5812 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
5820 p
->raw_status_new
= 0;
5822 p
->tick
= ++process_tick
;
5825 status_notify (NULL
);
5826 redisplay_preserve_echo_area (13);
5829 #endif /* ! defined (SIGCONT) */
5833 flush_pending_output (p
->infd
);
5837 /* If we don't have process groups, send the signal to the immediate
5838 subprocess. That isn't really right, but it's better than any
5839 obvious alternative. */
5842 kill (p
->pid
, signo
);
5846 /* gid may be a pid, or minus a pgrp's number */
5848 if (!NILP (current_group
))
5850 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
5851 EMACS_KILLPG (gid
, signo
);
5858 #else /* ! defined (TIOCSIGSEND) */
5859 EMACS_KILLPG (gid
, signo
);
5860 #endif /* ! defined (TIOCSIGSEND) */
5863 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
5864 doc
: /* Interrupt process PROCESS.
5865 PROCESS may be a process, a buffer, or the name of a process or buffer.
5866 No arg or nil means current buffer's process.
5867 Second arg CURRENT-GROUP non-nil means send signal to
5868 the current process-group of the process's controlling terminal
5869 rather than to the process's own process group.
5870 If the process is a shell, this means interrupt current subjob
5871 rather than the shell.
5873 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
5874 don't send the signal. */)
5875 (Lisp_Object process
, Lisp_Object current_group
)
5877 process_send_signal (process
, SIGINT
, current_group
, 0);
5881 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
5882 doc
: /* Kill process PROCESS. May be process or name of one.
5883 See function `interrupt-process' for more details on usage. */)
5884 (Lisp_Object process
, Lisp_Object current_group
)
5886 process_send_signal (process
, SIGKILL
, current_group
, 0);
5890 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
5891 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
5892 See function `interrupt-process' for more details on usage. */)
5893 (Lisp_Object process
, Lisp_Object current_group
)
5895 process_send_signal (process
, SIGQUIT
, current_group
, 0);
5899 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
5900 doc
: /* Stop process PROCESS. May be process or name of one.
5901 See function `interrupt-process' for more details on usage.
5902 If PROCESS is a network or serial process, inhibit handling of incoming
5904 (Lisp_Object process
, Lisp_Object current_group
)
5906 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
5908 struct Lisp_Process
*p
;
5910 p
= XPROCESS (process
);
5911 if (NILP (p
->command
)
5914 FD_CLR (p
->infd
, &input_wait_mask
);
5915 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
5921 error ("No SIGTSTP support");
5923 process_send_signal (process
, SIGTSTP
, current_group
, 0);
5928 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
5929 doc
: /* Continue process PROCESS. May be process or name of one.
5930 See function `interrupt-process' for more details on usage.
5931 If PROCESS is a network or serial process, resume handling of incoming
5933 (Lisp_Object process
, Lisp_Object current_group
)
5935 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
5937 struct Lisp_Process
*p
;
5939 p
= XPROCESS (process
);
5940 if (EQ (p
->command
, Qt
)
5942 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
5944 FD_SET (p
->infd
, &input_wait_mask
);
5945 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
5947 if (fd_info
[ p
->infd
].flags
& FILE_SERIAL
)
5948 PurgeComm (fd_info
[ p
->infd
].hnd
, PURGE_RXABORT
| PURGE_RXCLEAR
);
5949 #else /* not WINDOWSNT */
5950 tcflush (p
->infd
, TCIFLUSH
);
5951 #endif /* not WINDOWSNT */
5957 process_send_signal (process
, SIGCONT
, current_group
, 0);
5959 error ("No SIGCONT support");
5964 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
5965 2, 2, "sProcess (name or number): \nnSignal code: ",
5966 doc
: /* Send PROCESS the signal with code SIGCODE.
5967 PROCESS may also be a number specifying the process id of the
5968 process to signal; in this case, the process need not be a child of
5970 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
5971 (Lisp_Object process
, Lisp_Object sigcode
)
5975 if (INTEGERP (process
))
5977 pid
= XINT (process
);
5981 if (FLOATP (process
))
5983 pid
= (pid_t
) XFLOAT_DATA (process
);
5987 if (STRINGP (process
))
5990 if (tem
= Fget_process (process
), NILP (tem
))
5992 pid
= XINT (Fstring_to_number (process
, make_number (10)));
5999 process
= get_process (process
);
6004 CHECK_PROCESS (process
);
6005 pid
= XPROCESS (process
)->pid
;
6007 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6011 #define parse_signal(NAME, VALUE) \
6012 else if (!xstrcasecmp (name, NAME)) \
6013 XSETINT (sigcode, VALUE)
6015 if (INTEGERP (sigcode
))
6021 CHECK_SYMBOL (sigcode
);
6022 name
= SSDATA (SYMBOL_NAME (sigcode
));
6024 if (!strncmp (name
, "SIG", 3) || !strncmp (name
, "sig", 3))
6030 parse_signal ("usr1", SIGUSR1
);
6033 parse_signal ("usr2", SIGUSR2
);
6036 parse_signal ("term", SIGTERM
);
6039 parse_signal ("hup", SIGHUP
);
6042 parse_signal ("int", SIGINT
);
6045 parse_signal ("quit", SIGQUIT
);
6048 parse_signal ("ill", SIGILL
);
6051 parse_signal ("abrt", SIGABRT
);
6054 parse_signal ("emt", SIGEMT
);
6057 parse_signal ("kill", SIGKILL
);
6060 parse_signal ("fpe", SIGFPE
);
6063 parse_signal ("bus", SIGBUS
);
6066 parse_signal ("segv", SIGSEGV
);
6069 parse_signal ("sys", SIGSYS
);
6072 parse_signal ("pipe", SIGPIPE
);
6075 parse_signal ("alrm", SIGALRM
);
6078 parse_signal ("urg", SIGURG
);
6081 parse_signal ("stop", SIGSTOP
);
6084 parse_signal ("tstp", SIGTSTP
);
6087 parse_signal ("cont", SIGCONT
);
6090 parse_signal ("chld", SIGCHLD
);
6093 parse_signal ("ttin", SIGTTIN
);
6096 parse_signal ("ttou", SIGTTOU
);
6099 parse_signal ("io", SIGIO
);
6102 parse_signal ("xcpu", SIGXCPU
);
6105 parse_signal ("xfsz", SIGXFSZ
);
6108 parse_signal ("vtalrm", SIGVTALRM
);
6111 parse_signal ("prof", SIGPROF
);
6114 parse_signal ("winch", SIGWINCH
);
6117 parse_signal ("info", SIGINFO
);
6120 error ("Undefined signal name %s", name
);
6125 return make_number (kill (pid
, XINT (sigcode
)));
6128 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6129 doc
: /* Make PROCESS see end-of-file in its input.
6130 EOF comes after any text already sent to it.
6131 PROCESS may be a process, a buffer, the name of a process or buffer, or
6132 nil, indicating the current buffer's process.
6133 If PROCESS is a network connection, or is a process communicating
6134 through a pipe (as opposed to a pty), then you cannot send any more
6135 text to PROCESS after you call this function.
6136 If PROCESS is a serial process, wait until all output written to the
6137 process has been transmitted to the serial port. */)
6138 (Lisp_Object process
)
6141 struct coding_system
*coding
;
6143 if (DATAGRAM_CONN_P (process
))
6146 proc
= get_process (process
);
6147 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6149 /* Make sure the process is really alive. */
6150 if (XPROCESS (proc
)->raw_status_new
)
6151 update_status (XPROCESS (proc
));
6152 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6153 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6155 if (CODING_REQUIRE_FLUSHING (coding
))
6157 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6158 send_process (proc
, "", 0, Qnil
);
6161 if (XPROCESS (proc
)->pty_flag
)
6162 send_process (proc
, "\004", 1, Qnil
);
6163 else if (EQ (XPROCESS (proc
)->type
, Qserial
))
6166 if (tcdrain (XPROCESS (proc
)->outfd
) != 0)
6167 error ("tcdrain() failed: %s", emacs_strerror (errno
));
6168 #endif /* not WINDOWSNT */
6169 /* Do nothing on Windows because writes are blocking. */
6173 int old_outfd
, new_outfd
;
6175 #ifdef HAVE_SHUTDOWN
6176 /* If this is a network connection, or socketpair is used
6177 for communication with the subprocess, call shutdown to cause EOF.
6178 (In some old system, shutdown to socketpair doesn't work.
6179 Then we just can't win.) */
6180 if (EQ (XPROCESS (proc
)->type
, Qnetwork
)
6181 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6182 shutdown (XPROCESS (proc
)->outfd
, 1);
6183 /* In case of socketpair, outfd == infd, so don't close it. */
6184 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6185 emacs_close (XPROCESS (proc
)->outfd
);
6186 #else /* not HAVE_SHUTDOWN */
6187 emacs_close (XPROCESS (proc
)->outfd
);
6188 #endif /* not HAVE_SHUTDOWN */
6189 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6192 old_outfd
= XPROCESS (proc
)->outfd
;
6194 if (!proc_encode_coding_system
[new_outfd
])
6195 proc_encode_coding_system
[new_outfd
]
6196 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6197 memcpy (proc_encode_coding_system
[new_outfd
],
6198 proc_encode_coding_system
[old_outfd
],
6199 sizeof (struct coding_system
));
6200 memset (proc_encode_coding_system
[old_outfd
], 0,
6201 sizeof (struct coding_system
));
6203 XPROCESS (proc
)->outfd
= new_outfd
;
6208 /* On receipt of a signal that a child status has changed, loop asking
6209 about children with changed statuses until the system says there
6212 All we do is change the status; we do not run sentinels or print
6213 notifications. That is saved for the next time keyboard input is
6214 done, in order to avoid timing errors.
6216 ** WARNING: this can be called during garbage collection.
6217 Therefore, it must not be fooled by the presence of mark bits in
6220 ** USG WARNING: Although it is not obvious from the documentation
6221 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6222 signal() before executing at least one wait(), otherwise the
6223 handler will be called again, resulting in an infinite loop. The
6224 relevant portion of the documentation reads "SIGCLD signals will be
6225 queued and the signal-catching function will be continually
6226 reentered until the queue is empty". Invoking signal() causes the
6227 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6230 ** Malloc WARNING: This should never call malloc either directly or
6231 indirectly; if it does, that is a bug */
6235 sigchld_handler (int signo
)
6237 int old_errno
= errno
;
6239 struct Lisp_Process
*p
;
6241 SIGNAL_THREAD_CHECK (signo
);
6252 #endif /* no WUNTRACED */
6253 /* Keep trying to get a status until we get a definitive result. */
6257 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
6259 while (pid
< 0 && errno
== EINTR
);
6263 /* PID == 0 means no processes found, PID == -1 means a real
6264 failure. We have done all our job, so return. */
6271 #endif /* no WNOHANG */
6273 /* Find the process that signaled us, and record its status. */
6275 /* The process can have been deleted by Fdelete_process. */
6276 for (tail
= deleted_pid_list
; CONSP (tail
); tail
= XCDR (tail
))
6278 Lisp_Object xpid
= XCAR (tail
);
6279 if ((INTEGERP (xpid
) && pid
== (pid_t
) XINT (xpid
))
6280 || (FLOATP (xpid
) && pid
== (pid_t
) XFLOAT_DATA (xpid
)))
6282 XSETCAR (tail
, Qnil
);
6283 goto sigchld_end_of_loop
;
6287 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6289 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6291 proc
= XCDR (XCAR (tail
));
6292 p
= XPROCESS (proc
);
6293 if (EQ (p
->type
, Qreal
) && p
->pid
== pid
)
6298 /* Look for an asynchronous process whose pid hasn't been filled
6301 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6303 proc
= XCDR (XCAR (tail
));
6304 p
= XPROCESS (proc
);
6310 /* Change the status of the process that was found. */
6313 int clear_desc_flag
= 0;
6315 p
->tick
= ++process_tick
;
6317 p
->raw_status_new
= 1;
6319 /* If process has terminated, stop waiting for its output. */
6320 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6322 clear_desc_flag
= 1;
6324 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6325 if (clear_desc_flag
)
6327 FD_CLR (p
->infd
, &input_wait_mask
);
6328 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6331 /* Tell wait_reading_process_output that it needs to wake up and
6333 if (input_available_clear_time
)
6334 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6337 /* There was no asynchronous process found for that pid: we have
6338 a synchronous process. */
6341 synch_process_alive
= 0;
6343 /* Report the status of the synchronous process. */
6345 synch_process_retcode
= WRETCODE (w
);
6346 else if (WIFSIGNALED (w
))
6347 synch_process_termsig
= WTERMSIG (w
);
6349 /* Tell wait_reading_process_output that it needs to wake up and
6351 if (input_available_clear_time
)
6352 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6355 sigchld_end_of_loop
:
6358 /* On some systems, we must return right away.
6359 If any more processes want to signal us, we will
6361 Otherwise (on systems that have WNOHANG), loop around
6362 to use up all the processes that have something to tell us. */
6363 #if (defined WINDOWSNT \
6364 || (defined USG && !defined GNU_LINUX \
6365 && !(defined HPUX && defined WNOHANG)))
6368 #endif /* USG, but not HPUX with WNOHANG */
6371 #endif /* SIGCHLD */
6375 exec_sentinel_unwind (Lisp_Object data
)
6377 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
6382 exec_sentinel_error_handler (Lisp_Object error_val
)
6384 cmd_error_internal (error_val
, "error in process sentinel: ");
6386 update_echo_area ();
6387 Fsleep_for (make_number (2), Qnil
);
6392 exec_sentinel (Lisp_Object proc
, Lisp_Object reason
)
6394 Lisp_Object sentinel
, odeactivate
;
6395 register struct Lisp_Process
*p
= XPROCESS (proc
);
6396 int count
= SPECPDL_INDEX ();
6397 int outer_running_asynch_code
= running_asynch_code
;
6398 int waiting
= waiting_for_user_input_p
;
6400 if (inhibit_sentinels
)
6403 /* No need to gcpro these, because all we do with them later
6404 is test them for EQness, and none of them should be a string. */
6405 odeactivate
= Vdeactivate_mark
;
6407 Lisp_Object obuffer
, okeymap
;
6408 XSETBUFFER (obuffer
, current_buffer
);
6409 okeymap
= BVAR (current_buffer
, keymap
);
6412 /* There's no good reason to let sentinels change the current
6413 buffer, and many callers of accept-process-output, sit-for, and
6414 friends don't expect current-buffer to be changed from under them. */
6415 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
6417 sentinel
= p
->sentinel
;
6418 if (NILP (sentinel
))
6421 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6422 assure that it gets restored no matter how the sentinel exits. */
6424 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6425 /* Inhibit quit so that random quits don't screw up a running filter. */
6426 specbind (Qinhibit_quit
, Qt
);
6427 specbind (Qlast_nonmenu_event
, Qt
); /* Why? --Stef */
6429 /* In case we get recursively called,
6430 and we already saved the match data nonrecursively,
6431 save the same match data in safely recursive fashion. */
6432 if (outer_running_asynch_code
)
6435 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6436 restore_search_regs ();
6437 record_unwind_save_match_data ();
6438 Fset_match_data (tem
, Qt
);
6441 /* For speed, if a search happens within this code,
6442 save the match data in a special nonrecursive fashion. */
6443 running_asynch_code
= 1;
6445 internal_condition_case_1 (read_process_output_call
,
6447 Fcons (proc
, Fcons (reason
, Qnil
))),
6448 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6449 exec_sentinel_error_handler
);
6451 /* If we saved the match data nonrecursively, restore it now. */
6452 restore_search_regs ();
6453 running_asynch_code
= outer_running_asynch_code
;
6455 Vdeactivate_mark
= odeactivate
;
6457 /* Restore waiting_for_user_input_p as it was
6458 when we were called, in case the filter clobbered it. */
6459 waiting_for_user_input_p
= waiting
;
6462 if (! EQ (Fcurrent_buffer (), obuffer
)
6463 || ! EQ (current_buffer
->keymap
, okeymap
))
6465 /* But do it only if the caller is actually going to read events.
6466 Otherwise there's no need to make him wake up, and it could
6467 cause trouble (for example it would make sit_for return). */
6468 if (waiting_for_user_input_p
== -1)
6469 record_asynch_buffer_change ();
6471 unbind_to (count
, Qnil
);
6474 /* Report all recent events of a change in process status
6475 (either run the sentinel or output a message).
6476 This is usually done while Emacs is waiting for keyboard input
6477 but can be done at other times. */
6480 status_notify (struct Lisp_Process
*deleting_process
)
6482 register Lisp_Object proc
, buffer
;
6483 Lisp_Object tail
, msg
;
6484 struct gcpro gcpro1
, gcpro2
;
6488 /* We need to gcpro tail; if read_process_output calls a filter
6489 which deletes a process and removes the cons to which tail points
6490 from Vprocess_alist, and then causes a GC, tail is an unprotected
6494 /* Set this now, so that if new processes are created by sentinels
6495 that we run, we get called again to handle their status changes. */
6496 update_tick
= process_tick
;
6498 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6501 register struct Lisp_Process
*p
;
6503 proc
= Fcdr (XCAR (tail
));
6504 p
= XPROCESS (proc
);
6506 if (p
->tick
!= p
->update_tick
)
6508 p
->update_tick
= p
->tick
;
6510 /* If process is still active, read any output that remains. */
6511 while (! EQ (p
->filter
, Qt
)
6512 && ! EQ (p
->status
, Qconnect
)
6513 && ! EQ (p
->status
, Qlisten
)
6514 /* Network or serial process not stopped: */
6515 && ! EQ (p
->command
, Qt
)
6517 && p
!= deleting_process
6518 && read_process_output (proc
, p
->infd
) > 0);
6522 /* Get the text to use for the message. */
6523 if (p
->raw_status_new
)
6525 msg
= status_message (p
);
6527 /* If process is terminated, deactivate it or delete it. */
6529 if (CONSP (p
->status
))
6530 symbol
= XCAR (p
->status
);
6532 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6533 || EQ (symbol
, Qclosed
))
6535 if (delete_exited_processes
)
6536 remove_process (proc
);
6538 deactivate_process (proc
);
6541 /* The actions above may have further incremented p->tick.
6542 So set p->update_tick again
6543 so that an error in the sentinel will not cause
6544 this code to be run again. */
6545 p
->update_tick
= p
->tick
;
6546 /* Now output the message suitably. */
6547 if (!NILP (p
->sentinel
))
6548 exec_sentinel (proc
, msg
);
6549 /* Don't bother with a message in the buffer
6550 when a process becomes runnable. */
6551 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6554 struct buffer
*old
= current_buffer
;
6555 EMACS_INT opoint
, opoint_byte
;
6556 EMACS_INT before
, before_byte
;
6558 /* Avoid error if buffer is deleted
6559 (probably that's why the process is dead, too) */
6560 if (NILP (BVAR (XBUFFER (buffer
), name
)))
6562 Fset_buffer (buffer
);
6565 opoint_byte
= PT_BYTE
;
6566 /* Insert new output into buffer
6567 at the current end-of-output marker,
6568 thus preserving logical ordering of input and output. */
6569 if (XMARKER (p
->mark
)->buffer
)
6570 Fgoto_char (p
->mark
);
6572 SET_PT_BOTH (ZV
, ZV_BYTE
);
6575 before_byte
= PT_BYTE
;
6577 tem
= BVAR (current_buffer
, read_only
);
6578 BVAR (current_buffer
, read_only
) = Qnil
;
6579 insert_string ("\nProcess ");
6580 Finsert (1, &p
->name
);
6581 insert_string (" ");
6583 BVAR (current_buffer
, read_only
) = tem
;
6584 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6586 if (opoint
>= before
)
6587 SET_PT_BOTH (opoint
+ (PT
- before
),
6588 opoint_byte
+ (PT_BYTE
- before_byte
));
6590 SET_PT_BOTH (opoint
, opoint_byte
);
6592 set_buffer_internal (old
);
6597 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6602 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6603 Sset_process_coding_system
, 1, 3, 0,
6604 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6605 DECODING will be used to decode subprocess output and ENCODING to
6606 encode subprocess input. */)
6607 (register Lisp_Object process
, Lisp_Object decoding
, Lisp_Object encoding
)
6609 register struct Lisp_Process
*p
;
6611 CHECK_PROCESS (process
);
6612 p
= XPROCESS (process
);
6614 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6616 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6617 Fcheck_coding_system (decoding
);
6618 Fcheck_coding_system (encoding
);
6619 encoding
= coding_inherit_eol_type (encoding
, Qnil
);
6620 p
->decode_coding_system
= decoding
;
6621 p
->encode_coding_system
= encoding
;
6622 setup_process_coding_systems (process
);
6627 DEFUN ("process-coding-system",
6628 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6629 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6630 (register Lisp_Object process
)
6632 CHECK_PROCESS (process
);
6633 return Fcons (XPROCESS (process
)->decode_coding_system
,
6634 XPROCESS (process
)->encode_coding_system
);
6637 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6638 Sset_process_filter_multibyte
, 2, 2, 0,
6639 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6640 If FLAG is non-nil, the filter is given multibyte strings.
6641 If FLAG is nil, the filter is given unibyte strings. In this case,
6642 all character code conversion except for end-of-line conversion is
6644 (Lisp_Object process
, Lisp_Object flag
)
6646 register struct Lisp_Process
*p
;
6648 CHECK_PROCESS (process
);
6649 p
= XPROCESS (process
);
6651 p
->decode_coding_system
= raw_text_coding_system (p
->decode_coding_system
);
6652 setup_process_coding_systems (process
);
6657 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6658 Sprocess_filter_multibyte_p
, 1, 1, 0,
6659 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6660 (Lisp_Object process
)
6662 register struct Lisp_Process
*p
;
6663 struct coding_system
*coding
;
6665 CHECK_PROCESS (process
);
6666 p
= XPROCESS (process
);
6667 coding
= proc_decode_coding_system
[p
->infd
];
6668 return (CODING_FOR_UNIBYTE (coding
) ? Qnil
: Qt
);
6677 add_gpm_wait_descriptor (int desc
)
6679 add_keyboard_wait_descriptor (desc
);
6683 delete_gpm_wait_descriptor (int desc
)
6685 delete_keyboard_wait_descriptor (desc
);
6692 /* Return nonzero if *MASK has a bit set
6693 that corresponds to one of the keyboard input descriptors. */
6696 keyboard_bit_set (fd_set
*mask
)
6700 for (fd
= 0; fd
<= max_input_desc
; fd
++)
6701 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6702 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6709 #else /* not subprocesses */
6711 /* Defined on msdos.c. */
6712 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
6715 /* Implementation of wait_reading_process_output, assuming that there
6716 are no subprocesses. Used only by the MS-DOS build.
6718 Wait for timeout to elapse and/or keyboard input to be available.
6721 timeout in seconds, or
6722 zero for no limit, or
6723 -1 means gobble data immediately available but don't wait for any.
6725 read_kbd is a Lisp_Object:
6726 0 to ignore keyboard input, or
6727 1 to return when input is available, or
6728 -1 means caller will actually read the input, so don't throw to
6731 see full version for other parameters. We know that wait_proc will
6732 always be NULL, since `subprocesses' isn't defined.
6734 do_display != 0 means redisplay should be done to show subprocess
6735 output that arrives.
6737 Return true if we received input from any process. */
6740 wait_reading_process_output (int time_limit
, int microsecs
, int read_kbd
,
6742 Lisp_Object wait_for_cell
,
6743 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
6746 EMACS_TIME end_time
, timeout
;
6747 SELECT_TYPE waitchannels
;
6750 /* What does time_limit really mean? */
6751 if (time_limit
|| microsecs
)
6753 EMACS_GET_TIME (end_time
);
6754 EMACS_SET_SECS_USECS (timeout
, time_limit
, microsecs
);
6755 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6758 /* Turn off periodic alarms (in case they are in use)
6759 and then turn off any other atimers,
6760 because the select emulator uses alarms. */
6762 turn_on_atimers (0);
6766 int timeout_reduced_for_timers
= 0;
6768 /* If calling from keyboard input, do not quit
6769 since we want to return C-g as an input character.
6770 Otherwise, do pending quit if requested. */
6774 /* Exit now if the cell we're waiting for became non-nil. */
6775 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6778 /* Compute time from now till when time limit is up */
6779 /* Exit if already run out */
6780 if (time_limit
== -1)
6782 /* -1 specified for timeout means
6783 gobble output available now
6784 but don't wait at all. */
6786 EMACS_SET_SECS_USECS (timeout
, 0, 0);
6788 else if (time_limit
|| microsecs
)
6790 EMACS_GET_TIME (timeout
);
6791 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6792 if (EMACS_TIME_NEG_P (timeout
))
6797 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
6800 /* If our caller will not immediately handle keyboard events,
6801 run timer events directly.
6802 (Callers that will immediately read keyboard events
6803 call timer_delay on their own.) */
6804 if (NILP (wait_for_cell
))
6806 EMACS_TIME timer_delay
;
6810 int old_timers_run
= timers_run
;
6811 timer_delay
= timer_check ();
6812 if (timers_run
!= old_timers_run
&& do_display
)
6813 /* We must retry, since a timer may have requeued itself
6814 and that could alter the time delay. */
6815 redisplay_preserve_echo_area (14);
6819 while (!detect_input_pending ());
6821 /* If there is unread keyboard input, also return. */
6823 && requeued_events_pending_p ())
6826 if (! EMACS_TIME_NEG_P (timer_delay
) && time_limit
!= -1)
6828 EMACS_TIME difference
;
6829 EMACS_SUB_TIME (difference
, timer_delay
, timeout
);
6830 if (EMACS_TIME_NEG_P (difference
))
6832 timeout
= timer_delay
;
6833 timeout_reduced_for_timers
= 1;
6838 /* Cause C-g and alarm signals to take immediate action,
6839 and cause input available signals to zero out timeout. */
6841 set_waiting_for_input (&timeout
);
6843 /* Wait till there is something to do. */
6845 if (! read_kbd
&& NILP (wait_for_cell
))
6846 FD_ZERO (&waitchannels
);
6848 FD_SET (0, &waitchannels
);
6850 /* If a frame has been newly mapped and needs updating,
6851 reprocess its display stuff. */
6852 if (frame_garbaged
&& do_display
)
6854 clear_waiting_for_input ();
6855 redisplay_preserve_echo_area (15);
6857 set_waiting_for_input (&timeout
);
6860 if (read_kbd
&& detect_input_pending ())
6863 FD_ZERO (&waitchannels
);
6866 nfds
= select (1, &waitchannels
, (SELECT_TYPE
*)0, (SELECT_TYPE
*)0,
6871 /* Make C-g and alarm signals set flags again */
6872 clear_waiting_for_input ();
6874 /* If we woke up due to SIGWINCH, actually change size now. */
6875 do_pending_window_change (0);
6877 if (time_limit
&& nfds
== 0 && ! timeout_reduced_for_timers
)
6878 /* We waited the full specified time, so return now. */
6883 /* If the system call was interrupted, then go around the
6885 if (xerrno
== EINTR
)
6886 FD_ZERO (&waitchannels
);
6888 error ("select error: %s", emacs_strerror (xerrno
));
6891 /* Check for keyboard input */
6894 && detect_input_pending_run_timers (do_display
))
6896 swallow_events (do_display
);
6897 if (detect_input_pending_run_timers (do_display
))
6901 /* If there is unread keyboard input, also return. */
6903 && requeued_events_pending_p ())
6906 /* If wait_for_cell. check for keyboard input
6907 but don't run any timers.
6908 ??? (It seems wrong to me to check for keyboard
6909 input at all when wait_for_cell, but the code
6910 has been this way since July 1994.
6911 Try changing this after version 19.31.) */
6912 if (! NILP (wait_for_cell
)
6913 && detect_input_pending ())
6915 swallow_events (do_display
);
6916 if (detect_input_pending ())
6920 /* Exit now if the cell we're waiting for became non-nil. */
6921 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6930 #endif /* not subprocesses */
6932 /* The following functions are needed even if async subprocesses are
6933 not supported. Some of them are no-op stubs in that case. */
6935 /* Add DESC to the set of keyboard input descriptors. */
6938 add_keyboard_wait_descriptor (int desc
)
6940 #ifdef subprocesses /* actually means "not MSDOS" */
6941 FD_SET (desc
, &input_wait_mask
);
6942 FD_SET (desc
, &non_process_wait_mask
);
6943 if (desc
> max_input_desc
)
6944 max_input_desc
= desc
;
6948 /* From now on, do not expect DESC to give keyboard input. */
6951 delete_keyboard_wait_descriptor (int desc
)
6955 int lim
= max_input_desc
;
6957 FD_CLR (desc
, &input_wait_mask
);
6958 FD_CLR (desc
, &non_process_wait_mask
);
6960 if (desc
== max_input_desc
)
6961 for (fd
= 0; fd
< lim
; fd
++)
6962 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
6963 max_input_desc
= fd
;
6967 /* Setup coding systems of PROCESS. */
6970 setup_process_coding_systems (Lisp_Object process
)
6973 struct Lisp_Process
*p
= XPROCESS (process
);
6975 int outch
= p
->outfd
;
6976 Lisp_Object coding_system
;
6978 if (inch
< 0 || outch
< 0)
6981 if (!proc_decode_coding_system
[inch
])
6982 proc_decode_coding_system
[inch
]
6983 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6984 coding_system
= p
->decode_coding_system
;
6985 if (! NILP (p
->filter
))
6987 else if (BUFFERP (p
->buffer
))
6989 if (NILP (BVAR (XBUFFER (p
->buffer
), enable_multibyte_characters
)))
6990 coding_system
= raw_text_coding_system (coding_system
);
6992 setup_coding_system (coding_system
, proc_decode_coding_system
[inch
]);
6994 if (!proc_encode_coding_system
[outch
])
6995 proc_encode_coding_system
[outch
]
6996 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6997 setup_coding_system (p
->encode_coding_system
,
6998 proc_encode_coding_system
[outch
]);
7002 /* Close all descriptors currently in use for communication
7003 with subprocess. This is used in a newly-forked subprocess
7004 to get rid of irrelevant descriptors. */
7007 close_process_descs (void)
7011 for (i
= 0; i
< MAXDESC
; i
++)
7013 Lisp_Object process
;
7014 process
= chan_process
[i
];
7015 if (!NILP (process
))
7017 int in
= XPROCESS (process
)->infd
;
7018 int out
= XPROCESS (process
)->outfd
;
7021 if (out
>= 0 && in
!= out
)
7028 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7029 doc
: /* Return the (or a) process associated with BUFFER.
7030 BUFFER may be a buffer or the name of one. */)
7031 (register Lisp_Object buffer
)
7034 register Lisp_Object buf
, tail
, proc
;
7036 if (NILP (buffer
)) return Qnil
;
7037 buf
= Fget_buffer (buffer
);
7038 if (NILP (buf
)) return Qnil
;
7040 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7042 proc
= Fcdr (XCAR (tail
));
7043 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
7046 #endif /* subprocesses */
7050 DEFUN ("process-inherit-coding-system-flag",
7051 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7053 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
7054 If this flag is t, `buffer-file-coding-system' of the buffer
7055 associated with PROCESS will inherit the coding system used to decode
7056 the process output. */)
7057 (register Lisp_Object process
)
7060 CHECK_PROCESS (process
);
7061 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
7063 /* Ignore the argument and return the value of
7064 inherit-process-coding-system. */
7065 return inherit_process_coding_system
? Qt
: Qnil
;
7069 /* Kill all processes associated with `buffer'.
7070 If `buffer' is nil, kill all processes */
7073 kill_buffer_processes (Lisp_Object buffer
)
7076 Lisp_Object tail
, proc
;
7078 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7080 proc
= XCDR (XCAR (tail
));
7082 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
7084 if (NETCONN_P (proc
) || SERIALCONN_P (proc
))
7085 Fdelete_process (proc
);
7086 else if (XPROCESS (proc
)->infd
>= 0)
7087 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
7090 #else /* subprocesses */
7091 /* Since we have no subprocesses, this does nothing. */
7092 #endif /* subprocesses */
7095 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
,
7096 Swaiting_for_user_input_p
, 0, 0, 0,
7097 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
7098 This is intended for use by asynchronous process output filters and sentinels. */)
7102 return (waiting_for_user_input_p
? Qt
: Qnil
);
7108 /* Stop reading input from keyboard sources. */
7111 hold_keyboard_input (void)
7116 /* Resume reading input from keyboard sources. */
7119 unhold_keyboard_input (void)
7124 /* Return non-zero if keyboard input is on hold, zero otherwise. */
7127 kbd_on_hold_p (void)
7129 return kbd_is_on_hold
;
7133 /* Enumeration of and access to system processes a-la ps(1). */
7135 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
7137 doc
: /* Return a list of numerical process IDs of all running processes.
7138 If this functionality is unsupported, return nil.
7140 See `process-attributes' for getting attributes of a process given its ID. */)
7143 return list_system_processes ();
7146 DEFUN ("process-attributes", Fprocess_attributes
,
7147 Sprocess_attributes
, 1, 1, 0,
7148 doc
: /* Return attributes of the process given by its PID, a number.
7150 Value is an alist where each element is a cons cell of the form
7154 If this functionality is unsupported, the value is nil.
7156 See `list-system-processes' for getting a list of all process IDs.
7158 The KEYs of the attributes that this function may return are listed
7159 below, together with the type of the associated VALUE (in parentheses).
7160 Not all platforms support all of these attributes; unsupported
7161 attributes will not appear in the returned alist.
7162 Unless explicitly indicated otherwise, numbers can have either
7163 integer or floating point values.
7165 euid -- Effective user User ID of the process (number)
7166 user -- User name corresponding to euid (string)
7167 egid -- Effective user Group ID of the process (number)
7168 group -- Group name corresponding to egid (string)
7169 comm -- Command name (executable name only) (string)
7170 state -- Process state code, such as "S", "R", or "T" (string)
7171 ppid -- Parent process ID (number)
7172 pgrp -- Process group ID (number)
7173 sess -- Session ID, i.e. process ID of session leader (number)
7174 ttname -- Controlling tty name (string)
7175 tpgid -- ID of foreground process group on the process's tty (number)
7176 minflt -- number of minor page faults (number)
7177 majflt -- number of major page faults (number)
7178 cminflt -- cumulative number of minor page faults (number)
7179 cmajflt -- cumulative number of major page faults (number)
7180 utime -- user time used by the process, in the (HIGH LOW USEC) format
7181 stime -- system time used by the process, in the (HIGH LOW USEC) format
7182 time -- sum of utime and stime, in the (HIGH LOW USEC) format
7183 cutime -- user time used by the process and its children, (HIGH LOW USEC)
7184 cstime -- system time used by the process and its children, (HIGH LOW USEC)
7185 ctime -- sum of cutime and cstime, in the (HIGH LOW USEC) format
7186 pri -- priority of the process (number)
7187 nice -- nice value of the process (number)
7188 thcount -- process thread count (number)
7189 start -- time the process started, in the (HIGH LOW USEC) format
7190 vsize -- virtual memory size of the process in KB's (number)
7191 rss -- resident set size of the process in KB's (number)
7192 etime -- elapsed time the process is running, in (HIGH LOW USEC) format
7193 pcpu -- percents of CPU time used by the process (floating-point number)
7194 pmem -- percents of total physical memory used by process's resident set
7195 (floating-point number)
7196 args -- command line which invoked the process (string). */)
7199 return system_process_attributes (pid
);
7209 inhibit_sentinels
= 0;
7213 if (! noninteractive
|| initialized
)
7215 signal (SIGCHLD
, sigchld_handler
);
7218 FD_ZERO (&input_wait_mask
);
7219 FD_ZERO (&non_keyboard_wait_mask
);
7220 FD_ZERO (&non_process_wait_mask
);
7221 FD_ZERO (&write_mask
);
7222 max_process_desc
= 0;
7223 memset (fd_callback_info
, 0, sizeof (fd_callback_info
));
7225 #ifdef NON_BLOCKING_CONNECT
7226 FD_ZERO (&connect_wait_mask
);
7227 num_pending_connects
= 0;
7230 #ifdef ADAPTIVE_READ_BUFFERING
7231 process_output_delay_count
= 0;
7232 process_output_skip
= 0;
7235 /* Don't do this, it caused infinite select loops. The display
7236 method should call add_keyboard_wait_descriptor on stdin if it
7239 FD_SET (0, &input_wait_mask
);
7242 Vprocess_alist
= Qnil
;
7244 deleted_pid_list
= Qnil
;
7246 for (i
= 0; i
< MAXDESC
; i
++)
7248 chan_process
[i
] = Qnil
;
7249 proc_buffered_char
[i
] = -1;
7251 memset (proc_decode_coding_system
, 0, sizeof proc_decode_coding_system
);
7252 memset (proc_encode_coding_system
, 0, sizeof proc_encode_coding_system
);
7253 #ifdef DATAGRAM_SOCKETS
7254 memset (datagram_address
, 0, sizeof datagram_address
);
7258 Lisp_Object subfeatures
= Qnil
;
7259 const struct socket_options
*sopt
;
7261 #define ADD_SUBFEATURE(key, val) \
7262 subfeatures = pure_cons (pure_cons (key, pure_cons (val, Qnil)), subfeatures)
7264 #ifdef NON_BLOCKING_CONNECT
7265 ADD_SUBFEATURE (QCnowait
, Qt
);
7267 #ifdef DATAGRAM_SOCKETS
7268 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7270 #ifdef HAVE_SEQPACKET
7271 ADD_SUBFEATURE (QCtype
, Qseqpacket
);
7273 #ifdef HAVE_LOCAL_SOCKETS
7274 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7276 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7278 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7280 #ifdef HAVE_GETSOCKNAME
7281 ADD_SUBFEATURE (QCservice
, Qt
);
7283 #if defined(O_NONBLOCK) || defined(O_NDELAY)
7284 ADD_SUBFEATURE (QCserver
, Qt
);
7287 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7288 subfeatures
= pure_cons (intern_c_string (sopt
->name
), subfeatures
);
7290 Fprovide (intern_c_string ("make-network-process"), subfeatures
);
7293 #if defined (DARWIN_OS)
7294 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7295 processes. As such, we only change the default value. */
7298 char const *release
= (STRINGP (Voperating_system_release
)
7299 ? SSDATA (Voperating_system_release
)
7301 if (!release
|| !release
[0] || (release
[0] < MIN_PTY_KERNEL_VERSION
7302 && release
[1] == '.')) {
7303 Vprocess_connection_type
= Qnil
;
7307 #endif /* subprocesses */
7312 syms_of_process (void)
7316 DEFSYM (Qprocessp
, "processp");
7317 DEFSYM (Qrun
, "run");
7318 DEFSYM (Qstop
, "stop");
7319 DEFSYM (Qsignal
, "signal");
7321 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7324 Qexit = intern_c_string ("exit");
7325 staticpro (&Qexit); */
7327 DEFSYM (Qopen
, "open");
7328 DEFSYM (Qclosed
, "closed");
7329 DEFSYM (Qconnect
, "connect");
7330 DEFSYM (Qfailed
, "failed");
7331 DEFSYM (Qlisten
, "listen");
7332 DEFSYM (Qlocal
, "local");
7333 DEFSYM (Qipv4
, "ipv4");
7335 DEFSYM (Qipv6
, "ipv6");
7337 DEFSYM (Qdatagram
, "datagram");
7338 DEFSYM (Qseqpacket
, "seqpacket");
7340 DEFSYM (QCport
, ":port");
7341 DEFSYM (QCspeed
, ":speed");
7342 DEFSYM (QCprocess
, ":process");
7344 DEFSYM (QCbytesize
, ":bytesize");
7345 DEFSYM (QCstopbits
, ":stopbits");
7346 DEFSYM (QCparity
, ":parity");
7347 DEFSYM (Qodd
, "odd");
7348 DEFSYM (Qeven
, "even");
7349 DEFSYM (QCflowcontrol
, ":flowcontrol");
7352 DEFSYM (QCsummary
, ":summary");
7354 DEFSYM (Qreal
, "real");
7355 DEFSYM (Qnetwork
, "network");
7356 DEFSYM (Qserial
, "serial");
7357 DEFSYM (QCbuffer
, ":buffer");
7358 DEFSYM (QChost
, ":host");
7359 DEFSYM (QCservice
, ":service");
7360 DEFSYM (QClocal
, ":local");
7361 DEFSYM (QCremote
, ":remote");
7362 DEFSYM (QCcoding
, ":coding");
7363 DEFSYM (QCserver
, ":server");
7364 DEFSYM (QCnowait
, ":nowait");
7365 DEFSYM (QCsentinel
, ":sentinel");
7366 DEFSYM (QClog
, ":log");
7367 DEFSYM (QCnoquery
, ":noquery");
7368 DEFSYM (QCstop
, ":stop");
7369 DEFSYM (QCoptions
, ":options");
7370 DEFSYM (QCplist
, ":plist");
7372 DEFSYM (Qlast_nonmenu_event
, "last-nonmenu-event");
7374 staticpro (&Vprocess_alist
);
7376 staticpro (&deleted_pid_list
);
7379 #endif /* subprocesses */
7381 DEFSYM (QCname
, ":name");
7382 DEFSYM (QCtype
, ":type");
7384 DEFSYM (Qeuid
, "euid");
7385 DEFSYM (Qegid
, "egid");
7386 DEFSYM (Quser
, "user");
7387 DEFSYM (Qgroup
, "group");
7388 DEFSYM (Qcomm
, "comm");
7389 DEFSYM (Qstate
, "state");
7390 DEFSYM (Qppid
, "ppid");
7391 DEFSYM (Qpgrp
, "pgrp");
7392 DEFSYM (Qsess
, "sess");
7393 DEFSYM (Qttname
, "ttname");
7394 DEFSYM (Qtpgid
, "tpgid");
7395 DEFSYM (Qminflt
, "minflt");
7396 DEFSYM (Qmajflt
, "majflt");
7397 DEFSYM (Qcminflt
, "cminflt");
7398 DEFSYM (Qcmajflt
, "cmajflt");
7399 DEFSYM (Qutime
, "utime");
7400 DEFSYM (Qstime
, "stime");
7401 DEFSYM (Qtime
, "time");
7402 DEFSYM (Qcutime
, "cutime");
7403 DEFSYM (Qcstime
, "cstime");
7404 DEFSYM (Qctime
, "ctime");
7405 DEFSYM (Qpri
, "pri");
7406 DEFSYM (Qnice
, "nice");
7407 DEFSYM (Qthcount
, "thcount");
7408 DEFSYM (Qstart
, "start");
7409 DEFSYM (Qvsize
, "vsize");
7410 DEFSYM (Qrss
, "rss");
7411 DEFSYM (Qetime
, "etime");
7412 DEFSYM (Qpcpu
, "pcpu");
7413 DEFSYM (Qpmem
, "pmem");
7414 DEFSYM (Qargs
, "args");
7416 DEFVAR_BOOL ("delete-exited-processes", delete_exited_processes
,
7417 doc
: /* *Non-nil means delete processes immediately when they exit.
7418 A value of nil means don't delete them until `list-processes' is run. */);
7420 delete_exited_processes
= 1;
7423 DEFVAR_LISP ("process-connection-type", Vprocess_connection_type
,
7424 doc
: /* Control type of device used to communicate with subprocesses.
7425 Values are nil to use a pipe, or t or `pty' to use a pty.
7426 The value has no effect if the system has no ptys or if all ptys are busy:
7427 then a pipe is used in any case.
7428 The value takes effect when `start-process' is called. */);
7429 Vprocess_connection_type
= Qt
;
7431 #ifdef ADAPTIVE_READ_BUFFERING
7432 DEFVAR_LISP ("process-adaptive-read-buffering", Vprocess_adaptive_read_buffering
,
7433 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7434 On some systems, when Emacs reads the output from a subprocess, the output data
7435 is read in very small blocks, potentially resulting in very poor performance.
7436 This behavior can be remedied to some extent by setting this variable to a
7437 non-nil value, as it will automatically delay reading from such processes, to
7438 allow them to produce more output before Emacs tries to read it.
7439 If the value is t, the delay is reset after each write to the process; any other
7440 non-nil value means that the delay is not reset on write.
7441 The variable takes effect when `start-process' is called. */);
7442 Vprocess_adaptive_read_buffering
= Qt
;
7445 defsubr (&Sprocessp
);
7446 defsubr (&Sget_process
);
7447 defsubr (&Sdelete_process
);
7448 defsubr (&Sprocess_status
);
7449 defsubr (&Sprocess_exit_status
);
7450 defsubr (&Sprocess_id
);
7451 defsubr (&Sprocess_name
);
7452 defsubr (&Sprocess_tty_name
);
7453 defsubr (&Sprocess_command
);
7454 defsubr (&Sset_process_buffer
);
7455 defsubr (&Sprocess_buffer
);
7456 defsubr (&Sprocess_mark
);
7457 defsubr (&Sset_process_filter
);
7458 defsubr (&Sprocess_filter
);
7459 defsubr (&Sset_process_sentinel
);
7460 defsubr (&Sprocess_sentinel
);
7461 defsubr (&Sset_process_window_size
);
7462 defsubr (&Sset_process_inherit_coding_system_flag
);
7463 defsubr (&Sset_process_query_on_exit_flag
);
7464 defsubr (&Sprocess_query_on_exit_flag
);
7465 defsubr (&Sprocess_contact
);
7466 defsubr (&Sprocess_plist
);
7467 defsubr (&Sset_process_plist
);
7468 defsubr (&Sprocess_list
);
7469 defsubr (&Sstart_process
);
7470 defsubr (&Sserial_process_configure
);
7471 defsubr (&Smake_serial_process
);
7472 defsubr (&Sset_network_process_option
);
7473 defsubr (&Smake_network_process
);
7474 defsubr (&Sformat_network_address
);
7475 #if defined(HAVE_NET_IF_H)
7477 defsubr (&Snetwork_interface_list
);
7479 #if defined(SIOCGIFADDR) || defined(SIOCGIFHWADDR) || defined(SIOCGIFFLAGS)
7480 defsubr (&Snetwork_interface_info
);
7482 #endif /* defined(HAVE_NET_IF_H) */
7483 #ifdef DATAGRAM_SOCKETS
7484 defsubr (&Sprocess_datagram_address
);
7485 defsubr (&Sset_process_datagram_address
);
7487 defsubr (&Saccept_process_output
);
7488 defsubr (&Sprocess_send_region
);
7489 defsubr (&Sprocess_send_string
);
7490 defsubr (&Sinterrupt_process
);
7491 defsubr (&Skill_process
);
7492 defsubr (&Squit_process
);
7493 defsubr (&Sstop_process
);
7494 defsubr (&Scontinue_process
);
7495 defsubr (&Sprocess_running_child_p
);
7496 defsubr (&Sprocess_send_eof
);
7497 defsubr (&Ssignal_process
);
7498 defsubr (&Swaiting_for_user_input_p
);
7499 defsubr (&Sprocess_type
);
7500 defsubr (&Sset_process_coding_system
);
7501 defsubr (&Sprocess_coding_system
);
7502 defsubr (&Sset_process_filter_multibyte
);
7503 defsubr (&Sprocess_filter_multibyte_p
);
7505 #endif /* subprocesses */
7507 defsubr (&Sget_buffer_process
);
7508 defsubr (&Sprocess_inherit_coding_system_flag
);
7509 defsubr (&Slist_system_processes
);
7510 defsubr (&Sprocess_attributes
);