1 /* Asynchronous subprocess control for GNU Emacs.
3 Copyright (C) 1985-1988, 1993-1996, 1998-1999, 2001-2012
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 */
96 #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 /* Work around GCC 4.7.0 bug with strict overflow checking; see
124 <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52904>.
125 These lines can be removed once the GCC bug is fixed. */
126 #if (__GNUC__ == 4 && 3 <= __GNUC_MINOR__) || 4 < __GNUC__
127 # pragma GCC diagnostic ignored "-Wstrict-overflow"
130 Lisp_Object Qeuid
, Qegid
, Qcomm
, Qstate
, Qppid
, Qpgrp
, Qsess
, Qttname
, Qtpgid
;
131 Lisp_Object Qminflt
, Qmajflt
, Qcminflt
, Qcmajflt
, Qutime
, Qstime
, Qcstime
;
132 Lisp_Object Qcutime
, Qpri
, Qnice
, Qthcount
, Qstart
, Qvsize
, Qrss
, Qargs
;
133 Lisp_Object Quser
, Qgroup
, Qetime
, Qpcpu
, Qpmem
, Qtime
, Qctime
;
134 Lisp_Object QCname
, QCtype
;
136 /* Non-zero if keyboard input is on hold, zero otherwise. */
138 static int kbd_is_on_hold
;
140 /* Nonzero means don't run process sentinels. This is used
142 int inhibit_sentinels
;
146 Lisp_Object Qprocessp
;
147 static Lisp_Object Qrun
, Qstop
, Qsignal
;
148 static Lisp_Object Qopen
, Qclosed
, Qconnect
, Qfailed
, Qlisten
;
150 static Lisp_Object Qipv4
, Qdatagram
, Qseqpacket
;
151 static Lisp_Object Qreal
, Qnetwork
, Qserial
;
153 static Lisp_Object Qipv6
;
155 static Lisp_Object QCport
, QCprocess
;
157 Lisp_Object QCbytesize
, QCstopbits
, QCparity
, Qodd
, Qeven
;
158 Lisp_Object QCflowcontrol
, Qhw
, Qsw
, QCsummary
;
159 static Lisp_Object QCbuffer
, QChost
, QCservice
;
160 static Lisp_Object QClocal
, QCremote
, QCcoding
;
161 static Lisp_Object QCserver
, QCnowait
, QCnoquery
, QCstop
;
162 static Lisp_Object QCsentinel
, QClog
, QCoptions
, QCplist
;
163 static Lisp_Object Qlast_nonmenu_event
;
164 /* QCfamily is declared and initialized in xfaces.c,
165 QCfilter in keyboard.c. */
166 extern Lisp_Object QCfamily
, QCfilter
;
168 /* Qexit is declared and initialized in eval.c. */
170 /* QCfamily is defined in xfaces.c. */
171 extern Lisp_Object QCfamily
;
172 /* QCfilter is defined in keyboard.c. */
173 extern Lisp_Object QCfilter
;
175 #define NETCONN_P(p) (EQ (XPROCESS (p)->type, Qnetwork))
176 #define NETCONN1_P(p) (EQ ((p)->type, Qnetwork))
177 #define SERIALCONN_P(p) (EQ (XPROCESS (p)->type, Qserial))
178 #define SERIALCONN1_P(p) (EQ ((p)->type, Qserial))
184 /* Number of events of change of status of a process. */
185 static EMACS_INT process_tick
;
186 /* Number of events for which the user or sentinel has been notified. */
187 static EMACS_INT update_tick
;
189 /* Define NON_BLOCKING_CONNECT if we can support non-blocking connects. */
191 /* Only W32 has this, it really means that select can't take write mask. */
192 #ifdef BROKEN_NON_BLOCKING_CONNECT
193 #undef NON_BLOCKING_CONNECT
194 #define SELECT_CANT_DO_WRITE_MASK
196 #ifndef NON_BLOCKING_CONNECT
198 #if defined (HAVE_GETPEERNAME) || defined (GNU_LINUX)
199 #if defined (O_NONBLOCK) || defined (O_NDELAY)
200 #if defined (EWOULDBLOCK) || defined (EINPROGRESS)
201 #define NON_BLOCKING_CONNECT
202 #endif /* EWOULDBLOCK || EINPROGRESS */
203 #endif /* O_NONBLOCK || O_NDELAY */
204 #endif /* HAVE_GETPEERNAME || GNU_LINUX */
205 #endif /* HAVE_SELECT */
206 #endif /* NON_BLOCKING_CONNECT */
207 #endif /* BROKEN_NON_BLOCKING_CONNECT */
209 /* Define DATAGRAM_SOCKETS if datagrams can be used safely on
210 this system. We need to read full packets, so we need a
211 "non-destructive" select. So we require either native select,
212 or emulation of select using FIONREAD. */
214 #ifdef BROKEN_DATAGRAM_SOCKETS
215 #undef DATAGRAM_SOCKETS
217 #ifndef DATAGRAM_SOCKETS
218 #if defined (HAVE_SELECT) || defined (FIONREAD)
219 #if defined (HAVE_SENDTO) && defined (HAVE_RECVFROM) && defined (EMSGSIZE)
220 #define DATAGRAM_SOCKETS
221 #endif /* HAVE_SENDTO && HAVE_RECVFROM && EMSGSIZE */
222 #endif /* HAVE_SELECT || FIONREAD */
223 #endif /* DATAGRAM_SOCKETS */
224 #endif /* BROKEN_DATAGRAM_SOCKETS */
226 #if defined HAVE_LOCAL_SOCKETS && defined DATAGRAM_SOCKETS
227 # define HAVE_SEQPACKET
230 #if !defined (ADAPTIVE_READ_BUFFERING) && !defined (NO_ADAPTIVE_READ_BUFFERING)
231 #define ADAPTIVE_READ_BUFFERING
234 #ifdef ADAPTIVE_READ_BUFFERING
235 #define READ_OUTPUT_DELAY_INCREMENT (EMACS_TIME_RESOLUTION / 100)
236 #define READ_OUTPUT_DELAY_MAX (READ_OUTPUT_DELAY_INCREMENT * 5)
237 #define READ_OUTPUT_DELAY_MAX_MAX (READ_OUTPUT_DELAY_INCREMENT * 7)
239 /* Number of processes which have a non-zero read_output_delay,
240 and therefore might be delayed for adaptive read buffering. */
242 static int process_output_delay_count
;
244 /* Non-zero if any process has non-nil read_output_skip. */
246 static int process_output_skip
;
249 #define process_output_delay_count 0
252 static Lisp_Object
Fget_process (Lisp_Object
);
253 static void create_process (Lisp_Object
, char **, Lisp_Object
);
255 static int keyboard_bit_set (SELECT_TYPE
*);
257 static void deactivate_process (Lisp_Object
);
258 static void status_notify (struct Lisp_Process
*);
259 static int read_process_output (Lisp_Object
, int);
260 static void create_pty (Lisp_Object
);
262 /* If we support a window system, turn on the code to poll periodically
263 to detect C-g. It isn't actually used when doing interrupt input. */
264 #if defined (HAVE_WINDOW_SYSTEM) && !defined (USE_ASYNC_EVENTS)
265 #define POLL_FOR_INPUT
268 static Lisp_Object
get_process (register Lisp_Object name
);
269 static void exec_sentinel (Lisp_Object proc
, Lisp_Object reason
);
271 /* Mask of bits indicating the descriptors that we wait for input on. */
273 static SELECT_TYPE input_wait_mask
;
275 /* Mask that excludes keyboard input descriptor(s). */
277 static SELECT_TYPE non_keyboard_wait_mask
;
279 /* Mask that excludes process input descriptor(s). */
281 static SELECT_TYPE non_process_wait_mask
;
283 /* Mask for selecting for write. */
285 static SELECT_TYPE write_mask
;
287 #ifdef NON_BLOCKING_CONNECT
288 /* Mask of bits indicating the descriptors that we wait for connect to
289 complete on. Once they complete, they are removed from this mask
290 and added to the input_wait_mask and non_keyboard_wait_mask. */
292 static SELECT_TYPE connect_wait_mask
;
294 /* Number of bits set in connect_wait_mask. */
295 static int num_pending_connects
;
296 #endif /* NON_BLOCKING_CONNECT */
298 /* The largest descriptor currently in use for a process object. */
299 static int max_process_desc
;
301 /* The largest descriptor currently in use for input. */
302 static int max_input_desc
;
304 /* Indexed by descriptor, gives the process (if any) for that descriptor */
305 static Lisp_Object chan_process
[MAXDESC
];
307 /* Alist of elements (NAME . PROCESS) */
308 static Lisp_Object Vprocess_alist
;
310 /* Buffered-ahead input char from process, indexed by channel.
311 -1 means empty (no char is buffered).
312 Used on sys V where the only way to tell if there is any
313 output from the process is to read at least one char.
314 Always -1 on systems that support FIONREAD. */
316 static int proc_buffered_char
[MAXDESC
];
318 /* Table of `struct coding-system' for each process. */
319 static struct coding_system
*proc_decode_coding_system
[MAXDESC
];
320 static struct coding_system
*proc_encode_coding_system
[MAXDESC
];
322 #ifdef DATAGRAM_SOCKETS
323 /* Table of `partner address' for datagram sockets. */
324 static struct sockaddr_and_len
{
327 } datagram_address
[MAXDESC
];
328 #define DATAGRAM_CHAN_P(chan) (datagram_address[chan].sa != 0)
329 #define DATAGRAM_CONN_P(proc) (PROCESSP (proc) && datagram_address[XPROCESS (proc)->infd].sa != 0)
331 #define DATAGRAM_CHAN_P(chan) (0)
332 #define DATAGRAM_CONN_P(proc) (0)
335 /* Maximum number of bytes to send to a pty without an eof. */
336 static int pty_max_bytes
;
340 static struct fd_callback_data
346 int condition
; /* mask of the defines above. */
347 } fd_callback_info
[MAXDESC
];
350 /* Add a file descriptor FD to be monitored for when read is possible.
351 When read is possible, call FUNC with argument DATA. */
354 add_read_fd (int fd
, fd_callback func
, void *data
)
356 xassert (fd
< MAXDESC
);
357 add_keyboard_wait_descriptor (fd
);
359 fd_callback_info
[fd
].func
= func
;
360 fd_callback_info
[fd
].data
= data
;
361 fd_callback_info
[fd
].condition
|= FOR_READ
;
364 /* Stop monitoring file descriptor FD for when read is possible. */
367 delete_read_fd (int fd
)
369 xassert (fd
< MAXDESC
);
370 delete_keyboard_wait_descriptor (fd
);
372 fd_callback_info
[fd
].condition
&= ~FOR_READ
;
373 if (fd_callback_info
[fd
].condition
== 0)
375 fd_callback_info
[fd
].func
= 0;
376 fd_callback_info
[fd
].data
= 0;
380 /* Add a file descriptor FD to be monitored for when write is possible.
381 When write is possible, call FUNC with argument DATA. */
384 add_write_fd (int fd
, fd_callback func
, void *data
)
386 xassert (fd
< MAXDESC
);
387 FD_SET (fd
, &write_mask
);
388 if (fd
> max_input_desc
)
391 fd_callback_info
[fd
].func
= func
;
392 fd_callback_info
[fd
].data
= data
;
393 fd_callback_info
[fd
].condition
|= FOR_WRITE
;
396 /* Stop monitoring file descriptor FD for when write is possible. */
399 delete_write_fd (int fd
)
401 int lim
= max_input_desc
;
403 xassert (fd
< MAXDESC
);
404 FD_CLR (fd
, &write_mask
);
405 fd_callback_info
[fd
].condition
&= ~FOR_WRITE
;
406 if (fd_callback_info
[fd
].condition
== 0)
408 fd_callback_info
[fd
].func
= 0;
409 fd_callback_info
[fd
].data
= 0;
411 if (fd
== max_input_desc
)
412 for (fd
= lim
; fd
>= 0; fd
--)
413 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
423 /* Compute the Lisp form of the process status, p->status, from
424 the numeric status that was returned by `wait'. */
426 static Lisp_Object
status_convert (int);
429 update_status (struct Lisp_Process
*p
)
431 eassert (p
->raw_status_new
);
432 p
->status
= status_convert (p
->raw_status
);
433 p
->raw_status_new
= 0;
436 /* Convert a process status word in Unix format to
437 the list that we use internally. */
440 status_convert (int w
)
443 return Fcons (Qstop
, Fcons (make_number (WSTOPSIG (w
)), Qnil
));
444 else if (WIFEXITED (w
))
445 return Fcons (Qexit
, Fcons (make_number (WRETCODE (w
)),
446 WCOREDUMP (w
) ? Qt
: Qnil
));
447 else if (WIFSIGNALED (w
))
448 return Fcons (Qsignal
, Fcons (make_number (WTERMSIG (w
)),
449 WCOREDUMP (w
) ? Qt
: Qnil
));
454 /* Given a status-list, extract the three pieces of information
455 and store them individually through the three pointers. */
458 decode_status (Lisp_Object l
, Lisp_Object
*symbol
, int *code
, int *coredump
)
472 *code
= XFASTINT (XCAR (tem
));
474 *coredump
= !NILP (tem
);
478 /* Return a string describing a process status list. */
481 status_message (struct Lisp_Process
*p
)
483 Lisp_Object status
= p
->status
;
486 Lisp_Object string
, string2
;
488 decode_status (status
, &symbol
, &code
, &coredump
);
490 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qstop
))
493 synchronize_system_messages_locale ();
494 signame
= strsignal (code
);
496 string
= build_string ("unknown");
501 string
= make_unibyte_string (signame
, strlen (signame
));
502 if (! NILP (Vlocale_coding_system
))
503 string
= (code_convert_string_norecord
504 (string
, Vlocale_coding_system
, 0));
505 c1
= STRING_CHAR (SDATA (string
));
508 Faset (string
, make_number (0), make_number (c2
));
510 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
511 return concat2 (string
, string2
);
513 else if (EQ (symbol
, Qexit
))
516 return build_string (code
== 0 ? "deleted\n" : "connection broken by remote peer\n");
518 return build_string ("finished\n");
519 string
= Fnumber_to_string (make_number (code
));
520 string2
= build_string (coredump
? " (core dumped)\n" : "\n");
521 return concat3 (build_string ("exited abnormally with code "),
524 else if (EQ (symbol
, Qfailed
))
526 string
= Fnumber_to_string (make_number (code
));
527 string2
= build_string ("\n");
528 return concat3 (build_string ("failed with code "),
532 return Fcopy_sequence (Fsymbol_name (symbol
));
537 /* The file name of the pty opened by allocate_pty. */
538 static char pty_name
[24];
540 /* Open an available pty, returning a file descriptor.
541 Return -1 on failure.
542 The file name of the terminal corresponding to the pty
543 is left in the variable pty_name. */
554 for (c
= FIRST_PTY_LETTER
; c
<= 'z'; c
++)
555 for (i
= 0; i
< 16; i
++)
558 #ifdef PTY_NAME_SPRINTF
561 sprintf (pty_name
, "/dev/pty%c%x", c
, i
);
562 #endif /* no PTY_NAME_SPRINTF */
566 #else /* no PTY_OPEN */
568 { /* Some systems name their pseudoterminals so that there are gaps in
569 the usual sequence - for example, on HP9000/S700 systems, there
570 are no pseudoterminals with names ending in 'f'. So we wait for
571 three failures in a row before deciding that we've reached the
573 int failed_count
= 0;
576 if (stat (pty_name
, &stb
) < 0)
579 if (failed_count
>= 3)
586 fd
= emacs_open (pty_name
, O_RDWR
| O_NONBLOCK
, 0);
588 fd
= emacs_open (pty_name
, O_RDWR
| O_NDELAY
, 0);
591 #endif /* no PTY_OPEN */
595 /* check to make certain that both sides are available
596 this avoids a nasty yet stupid bug in rlogins */
597 #ifdef PTY_TTY_NAME_SPRINTF
600 sprintf (pty_name
, "/dev/tty%c%x", c
, i
);
601 #endif /* no PTY_TTY_NAME_SPRINTF */
602 if (access (pty_name
, 6) != 0)
617 #endif /* HAVE_PTYS */
620 make_process (Lisp_Object name
)
622 register Lisp_Object val
, tem
, name1
;
623 register struct Lisp_Process
*p
;
624 char suffix
[sizeof "<>" + INT_STRLEN_BOUND (printmax_t
)];
627 p
= allocate_process ();
635 p
->raw_status_new
= 0;
637 p
->mark
= Fmake_marker ();
638 p
->kill_without_query
= 0;
639 p
->write_queue
= Qnil
;
641 #ifdef ADAPTIVE_READ_BUFFERING
642 p
->adaptive_read_buffering
= 0;
643 p
->read_output_delay
= 0;
644 p
->read_output_skip
= 0;
648 p
->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
649 /* Default log level. */
650 p
->gnutls_log_level
= 0;
651 /* GnuTLS handshakes attempted for this connection. */
652 p
->gnutls_handshakes_tried
= 0;
654 p
->gnutls_state
= NULL
;
655 p
->gnutls_x509_cred
= NULL
;
656 p
->gnutls_anon_cred
= NULL
;
659 /* If name is already in use, modify it until it is unused. */
664 tem
= Fget_process (name1
);
665 if (NILP (tem
)) break;
666 sprintf (suffix
, "<%"pMd
">", i
);
667 name1
= concat2 (name
, build_string (suffix
));
671 XSETPROCESS (val
, p
);
672 Vprocess_alist
= Fcons (Fcons (name
, val
), Vprocess_alist
);
677 remove_process (register Lisp_Object proc
)
679 register Lisp_Object pair
;
681 pair
= Frassq (proc
, Vprocess_alist
);
682 Vprocess_alist
= Fdelq (pair
, Vprocess_alist
);
684 deactivate_process (proc
);
688 DEFUN ("processp", Fprocessp
, Sprocessp
, 1, 1, 0,
689 doc
: /* Return t if OBJECT is a process. */)
692 return PROCESSP (object
) ? Qt
: Qnil
;
695 DEFUN ("get-process", Fget_process
, Sget_process
, 1, 1, 0,
696 doc
: /* Return the process named NAME, or nil if there is none. */)
697 (register Lisp_Object name
)
702 return Fcdr (Fassoc (name
, Vprocess_alist
));
705 /* This is how commands for the user decode process arguments. It
706 accepts a process, a process name, a buffer, a buffer name, or nil.
707 Buffers denote the first process in the buffer, and nil denotes the
711 get_process (register Lisp_Object name
)
713 register Lisp_Object proc
, obj
;
716 obj
= Fget_process (name
);
718 obj
= Fget_buffer (name
);
720 error ("Process %s does not exist", SDATA (name
));
722 else if (NILP (name
))
723 obj
= Fcurrent_buffer ();
727 /* Now obj should be either a buffer object or a process object.
731 proc
= Fget_buffer_process (obj
);
733 error ("Buffer %s has no process", SDATA (BVAR (XBUFFER (obj
), name
)));
745 /* Fdelete_process promises to immediately forget about the process, but in
746 reality, Emacs needs to remember those processes until they have been
747 treated by sigchld_handler; otherwise this handler would consider the
748 process as being synchronous and say that the synchronous process is
750 static Lisp_Object deleted_pid_list
;
753 DEFUN ("delete-process", Fdelete_process
, Sdelete_process
, 1, 1, 0,
754 doc
: /* Delete PROCESS: kill it and forget about it immediately.
755 PROCESS may be a process, a buffer, the name of a process or buffer, or
756 nil, indicating the current buffer's process. */)
757 (register Lisp_Object process
)
759 register struct Lisp_Process
*p
;
761 process
= get_process (process
);
762 p
= XPROCESS (process
);
764 p
->raw_status_new
= 0;
765 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
767 p
->status
= Fcons (Qexit
, Fcons (make_number (0), Qnil
));
768 p
->tick
= ++process_tick
;
770 redisplay_preserve_echo_area (13);
772 else if (p
->infd
>= 0)
778 /* No problem storing the pid here, as it is still in Vprocess_alist. */
779 deleted_pid_list
= Fcons (make_fixnum_or_float (pid
),
780 /* GC treated elements set to nil. */
781 Fdelq (Qnil
, deleted_pid_list
));
782 /* If the process has already signaled, remove it from the list. */
783 if (p
->raw_status_new
)
786 if (CONSP (p
->status
))
787 symbol
= XCAR (p
->status
);
788 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
))
790 = Fdelete (make_fixnum_or_float (pid
), deleted_pid_list
);
794 Fkill_process (process
, Qnil
);
795 /* Do this now, since remove_process will make sigchld_handler do nothing. */
797 = Fcons (Qsignal
, Fcons (make_number (SIGKILL
), Qnil
));
798 p
->tick
= ++process_tick
;
800 redisplay_preserve_echo_area (13);
803 remove_process (process
);
807 DEFUN ("process-status", Fprocess_status
, Sprocess_status
, 1, 1, 0,
808 doc
: /* Return the status of PROCESS.
809 The returned value is one of the following symbols:
810 run -- for a process that is running.
811 stop -- for a process stopped but continuable.
812 exit -- for a process that has exited.
813 signal -- for a process that has got a fatal signal.
814 open -- for a network stream connection that is open.
815 listen -- for a network stream server that is listening.
816 closed -- for a network stream connection that is closed.
817 connect -- when waiting for a non-blocking connection to complete.
818 failed -- when a non-blocking connection has failed.
819 nil -- if arg is a process name and no such process exists.
820 PROCESS may be a process, a buffer, the name of a process, or
821 nil, indicating the current buffer's process. */)
822 (register Lisp_Object process
)
824 register struct Lisp_Process
*p
;
825 register Lisp_Object status
;
827 if (STRINGP (process
))
828 process
= Fget_process (process
);
830 process
= get_process (process
);
835 p
= XPROCESS (process
);
836 if (p
->raw_status_new
)
840 status
= XCAR (status
);
841 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
843 if (EQ (status
, Qexit
))
845 else if (EQ (p
->command
, Qt
))
847 else if (EQ (status
, Qrun
))
853 DEFUN ("process-exit-status", Fprocess_exit_status
, Sprocess_exit_status
,
855 doc
: /* Return the exit status of PROCESS or the signal number that killed it.
856 If PROCESS has not yet exited or died, return 0. */)
857 (register Lisp_Object process
)
859 CHECK_PROCESS (process
);
860 if (XPROCESS (process
)->raw_status_new
)
861 update_status (XPROCESS (process
));
862 if (CONSP (XPROCESS (process
)->status
))
863 return XCAR (XCDR (XPROCESS (process
)->status
));
864 return make_number (0);
867 DEFUN ("process-id", Fprocess_id
, Sprocess_id
, 1, 1, 0,
868 doc
: /* Return the process id of PROCESS.
869 This is the pid of the external process which PROCESS uses or talks to.
870 For a network connection, this value is nil. */)
871 (register Lisp_Object process
)
875 CHECK_PROCESS (process
);
876 pid
= XPROCESS (process
)->pid
;
877 return (pid
? make_fixnum_or_float (pid
) : Qnil
);
880 DEFUN ("process-name", Fprocess_name
, Sprocess_name
, 1, 1, 0,
881 doc
: /* Return the name of PROCESS, as a string.
882 This is the name of the program invoked in PROCESS,
883 possibly modified to make it unique among process names. */)
884 (register Lisp_Object process
)
886 CHECK_PROCESS (process
);
887 return XPROCESS (process
)->name
;
890 DEFUN ("process-command", Fprocess_command
, Sprocess_command
, 1, 1, 0,
891 doc
: /* Return the command that was executed to start PROCESS.
892 This is a list of strings, the first string being the program executed
893 and the rest of the strings being the arguments given to it.
894 For a network or serial process, this is nil (process is running) or t
895 \(process is stopped). */)
896 (register Lisp_Object process
)
898 CHECK_PROCESS (process
);
899 return XPROCESS (process
)->command
;
902 DEFUN ("process-tty-name", Fprocess_tty_name
, Sprocess_tty_name
, 1, 1, 0,
903 doc
: /* Return the name of the terminal PROCESS uses, or nil if none.
904 This is the terminal that the process itself reads and writes on,
905 not the name of the pty that Emacs uses to talk with that terminal. */)
906 (register Lisp_Object process
)
908 CHECK_PROCESS (process
);
909 return XPROCESS (process
)->tty_name
;
912 DEFUN ("set-process-buffer", Fset_process_buffer
, Sset_process_buffer
,
914 doc
: /* Set buffer associated with PROCESS to BUFFER (a buffer, or nil).
916 (register Lisp_Object process
, Lisp_Object buffer
)
918 struct Lisp_Process
*p
;
920 CHECK_PROCESS (process
);
922 CHECK_BUFFER (buffer
);
923 p
= XPROCESS (process
);
925 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
926 p
->childp
= Fplist_put (p
->childp
, QCbuffer
, buffer
);
927 setup_process_coding_systems (process
);
931 DEFUN ("process-buffer", Fprocess_buffer
, Sprocess_buffer
,
933 doc
: /* Return the buffer PROCESS is associated with.
934 Output from PROCESS is inserted in this buffer unless PROCESS has a filter. */)
935 (register Lisp_Object process
)
937 CHECK_PROCESS (process
);
938 return XPROCESS (process
)->buffer
;
941 DEFUN ("process-mark", Fprocess_mark
, Sprocess_mark
,
943 doc
: /* Return the marker for the end of the last output from PROCESS. */)
944 (register Lisp_Object process
)
946 CHECK_PROCESS (process
);
947 return XPROCESS (process
)->mark
;
950 DEFUN ("set-process-filter", Fset_process_filter
, Sset_process_filter
,
952 doc
: /* Give PROCESS the filter function FILTER; nil means no filter.
953 A value of t means stop accepting output from the process.
955 When a process has a filter, its buffer is not used for output.
956 Instead, each time it does output, the entire string of output is
957 passed to the filter.
959 The filter gets two arguments: the process and the string of output.
960 The string argument is normally a multibyte string, except:
961 - if the process' input coding system is no-conversion or raw-text,
962 it is a unibyte string (the non-converted input), or else
963 - if `default-enable-multibyte-characters' is nil, it is a unibyte
964 string (the result of converting the decoded input multibyte
965 string to unibyte with `string-make-unibyte'). */)
966 (register Lisp_Object process
, Lisp_Object filter
)
968 struct Lisp_Process
*p
;
970 CHECK_PROCESS (process
);
971 p
= XPROCESS (process
);
973 /* Don't signal an error if the process' input file descriptor
974 is closed. This could make debugging Lisp more difficult,
975 for example when doing something like
977 (setq process (start-process ...))
979 (set-process-filter process ...) */
983 if (EQ (filter
, Qt
) && !EQ (p
->status
, Qlisten
))
985 FD_CLR (p
->infd
, &input_wait_mask
);
986 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
988 else if (EQ (p
->filter
, Qt
)
989 /* Network or serial process not stopped: */
990 && !EQ (p
->command
, Qt
))
992 FD_SET (p
->infd
, &input_wait_mask
);
993 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
998 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
999 p
->childp
= Fplist_put (p
->childp
, QCfilter
, filter
);
1000 setup_process_coding_systems (process
);
1004 DEFUN ("process-filter", Fprocess_filter
, Sprocess_filter
,
1006 doc
: /* Returns the filter function of PROCESS; nil if none.
1007 See `set-process-filter' for more info on filter functions. */)
1008 (register Lisp_Object process
)
1010 CHECK_PROCESS (process
);
1011 return XPROCESS (process
)->filter
;
1014 DEFUN ("set-process-sentinel", Fset_process_sentinel
, Sset_process_sentinel
,
1016 doc
: /* Give PROCESS the sentinel SENTINEL; nil for none.
1017 The sentinel is called as a function when the process changes state.
1018 It gets two arguments: the process, and a string describing the change. */)
1019 (register Lisp_Object process
, Lisp_Object sentinel
)
1021 struct Lisp_Process
*p
;
1023 CHECK_PROCESS (process
);
1024 p
= XPROCESS (process
);
1026 p
->sentinel
= sentinel
;
1027 if (NETCONN1_P (p
) || SERIALCONN1_P (p
))
1028 p
->childp
= Fplist_put (p
->childp
, QCsentinel
, sentinel
);
1032 DEFUN ("process-sentinel", Fprocess_sentinel
, Sprocess_sentinel
,
1034 doc
: /* Return the sentinel of PROCESS; nil if none.
1035 See `set-process-sentinel' for more info on sentinels. */)
1036 (register Lisp_Object process
)
1038 CHECK_PROCESS (process
);
1039 return XPROCESS (process
)->sentinel
;
1042 DEFUN ("set-process-window-size", Fset_process_window_size
,
1043 Sset_process_window_size
, 3, 3, 0,
1044 doc
: /* Tell PROCESS that it has logical window size HEIGHT and WIDTH. */)
1045 (register Lisp_Object process
, Lisp_Object height
, Lisp_Object width
)
1047 CHECK_PROCESS (process
);
1048 CHECK_RANGED_INTEGER (0, height
, INT_MAX
);
1049 CHECK_RANGED_INTEGER (0, width
, INT_MAX
);
1051 if (XPROCESS (process
)->infd
< 0
1052 || set_window_size (XPROCESS (process
)->infd
,
1053 XINT (height
), XINT (width
)) <= 0)
1059 DEFUN ("set-process-inherit-coding-system-flag",
1060 Fset_process_inherit_coding_system_flag
,
1061 Sset_process_inherit_coding_system_flag
, 2, 2, 0,
1062 doc
: /* Determine whether buffer of PROCESS will inherit coding-system.
1063 If the second argument FLAG is non-nil, then the variable
1064 `buffer-file-coding-system' of the buffer associated with PROCESS
1065 will be bound to the value of the coding system used to decode
1068 This is useful when the coding system specified for the process buffer
1069 leaves either the character code conversion or the end-of-line conversion
1070 unspecified, or if the coding system used to decode the process output
1071 is more appropriate for saving the process buffer.
1073 Binding the variable `inherit-process-coding-system' to non-nil before
1074 starting the process is an alternative way of setting the inherit flag
1075 for the process which will run.
1077 This function returns FLAG. */)
1078 (register Lisp_Object process
, Lisp_Object flag
)
1080 CHECK_PROCESS (process
);
1081 XPROCESS (process
)->inherit_coding_system_flag
= !NILP (flag
);
1085 DEFUN ("set-process-query-on-exit-flag",
1086 Fset_process_query_on_exit_flag
, Sset_process_query_on_exit_flag
,
1088 doc
: /* Specify if query is needed for PROCESS when Emacs is exited.
1089 If the second argument FLAG is non-nil, Emacs will query the user before
1090 exiting or killing a buffer if PROCESS is running. This function
1092 (register Lisp_Object process
, Lisp_Object flag
)
1094 CHECK_PROCESS (process
);
1095 XPROCESS (process
)->kill_without_query
= NILP (flag
);
1099 DEFUN ("process-query-on-exit-flag",
1100 Fprocess_query_on_exit_flag
, Sprocess_query_on_exit_flag
,
1102 doc
: /* Return the current value of query-on-exit flag for PROCESS. */)
1103 (register Lisp_Object process
)
1105 CHECK_PROCESS (process
);
1106 return (XPROCESS (process
)->kill_without_query
? Qnil
: Qt
);
1109 #ifdef DATAGRAM_SOCKETS
1110 static Lisp_Object
Fprocess_datagram_address (Lisp_Object
);
1113 DEFUN ("process-contact", Fprocess_contact
, Sprocess_contact
,
1115 doc
: /* Return the contact info of PROCESS; t for a real child.
1116 For a network or serial connection, the value depends on the optional
1117 KEY arg. If KEY is nil, value is a cons cell of the form (HOST
1118 SERVICE) for a network connection or (PORT SPEED) for a serial
1119 connection. If KEY is t, the complete contact information for the
1120 connection is returned, else the specific value for the keyword KEY is
1121 returned. See `make-network-process' or `make-serial-process' for a
1122 list of keywords. */)
1123 (register Lisp_Object process
, Lisp_Object key
)
1125 Lisp_Object contact
;
1127 CHECK_PROCESS (process
);
1128 contact
= XPROCESS (process
)->childp
;
1130 #ifdef DATAGRAM_SOCKETS
1131 if (DATAGRAM_CONN_P (process
)
1132 && (EQ (key
, Qt
) || EQ (key
, QCremote
)))
1133 contact
= Fplist_put (contact
, QCremote
,
1134 Fprocess_datagram_address (process
));
1137 if ((!NETCONN_P (process
) && !SERIALCONN_P (process
)) || EQ (key
, Qt
))
1139 if (NILP (key
) && NETCONN_P (process
))
1140 return Fcons (Fplist_get (contact
, QChost
),
1141 Fcons (Fplist_get (contact
, QCservice
), Qnil
));
1142 if (NILP (key
) && SERIALCONN_P (process
))
1143 return Fcons (Fplist_get (contact
, QCport
),
1144 Fcons (Fplist_get (contact
, QCspeed
), Qnil
));
1145 return Fplist_get (contact
, key
);
1148 DEFUN ("process-plist", Fprocess_plist
, Sprocess_plist
,
1150 doc
: /* Return the plist of PROCESS. */)
1151 (register Lisp_Object process
)
1153 CHECK_PROCESS (process
);
1154 return XPROCESS (process
)->plist
;
1157 DEFUN ("set-process-plist", Fset_process_plist
, Sset_process_plist
,
1159 doc
: /* Replace the plist of PROCESS with PLIST. Returns PLIST. */)
1160 (register Lisp_Object process
, Lisp_Object plist
)
1162 CHECK_PROCESS (process
);
1165 XPROCESS (process
)->plist
= plist
;
1169 #if 0 /* Turned off because we don't currently record this info
1170 in the process. Perhaps add it. */
1171 DEFUN ("process-connection", Fprocess_connection
, Sprocess_connection
, 1, 1, 0,
1172 doc
: /* Return the connection type of PROCESS.
1173 The value is nil for a pipe, t or `pty' for a pty, or `stream' for
1174 a socket connection. */)
1175 (Lisp_Object process
)
1177 return XPROCESS (process
)->type
;
1181 DEFUN ("process-type", Fprocess_type
, Sprocess_type
, 1, 1, 0,
1182 doc
: /* Return the connection type of PROCESS.
1183 The value is either the symbol `real', `network', or `serial'.
1184 PROCESS may be a process, a buffer, the name of a process or buffer, or
1185 nil, indicating the current buffer's process. */)
1186 (Lisp_Object process
)
1189 proc
= get_process (process
);
1190 return XPROCESS (proc
)->type
;
1193 DEFUN ("format-network-address", Fformat_network_address
, Sformat_network_address
,
1195 doc
: /* Convert network ADDRESS from internal format to a string.
1196 A 4 or 5 element vector represents an IPv4 address (with port number).
1197 An 8 or 9 element vector represents an IPv6 address (with port number).
1198 If optional second argument OMIT-PORT is non-nil, don't include a port
1199 number in the string, even when present in ADDRESS.
1200 Returns nil if format of ADDRESS is invalid. */)
1201 (Lisp_Object address
, Lisp_Object omit_port
)
1206 if (STRINGP (address
)) /* AF_LOCAL */
1209 if (VECTORP (address
)) /* AF_INET or AF_INET6 */
1211 register struct Lisp_Vector
*p
= XVECTOR (address
);
1212 ptrdiff_t size
= p
->header
.size
;
1213 Lisp_Object args
[10];
1216 if (size
== 4 || (size
== 5 && !NILP (omit_port
)))
1218 args
[0] = build_string ("%d.%d.%d.%d");
1223 args
[0] = build_string ("%d.%d.%d.%d:%d");
1226 else if (size
== 8 || (size
== 9 && !NILP (omit_port
)))
1228 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
1233 args
[0] = build_string ("[%x:%x:%x:%x:%x:%x:%x:%x]:%d");
1239 for (i
= 0; i
< nargs
; i
++)
1241 if (! RANGED_INTEGERP (0, p
->contents
[i
], 65535))
1244 if (nargs
<= 5 /* IPv4 */
1245 && i
< 4 /* host, not port */
1246 && XINT (p
->contents
[i
]) > 255)
1249 args
[i
+1] = p
->contents
[i
];
1252 return Fformat (nargs
+1, args
);
1255 if (CONSP (address
))
1257 Lisp_Object args
[2];
1258 args
[0] = build_string ("<Family %d>");
1259 args
[1] = Fcar (address
);
1260 return Fformat (2, args
);
1266 DEFUN ("process-list", Fprocess_list
, Sprocess_list
, 0, 0, 0,
1267 doc
: /* Return a list of all processes. */)
1270 return Fmapcar (Qcdr
, Vprocess_alist
);
1273 /* Starting asynchronous inferior processes. */
1275 static Lisp_Object
start_process_unwind (Lisp_Object proc
);
1277 DEFUN ("start-process", Fstart_process
, Sstart_process
, 3, MANY
, 0,
1278 doc
: /* Start a program in a subprocess. Return the process object for it.
1279 NAME is name for process. It is modified if necessary to make it unique.
1280 BUFFER is the buffer (or buffer name) to associate with the process.
1282 Process output (both standard output and standard error streams) goes
1283 at end of BUFFER, unless you specify an output stream or filter
1284 function to handle the output. BUFFER may also be nil, meaning that
1285 this process is not associated with any buffer.
1287 PROGRAM is the program file name. It is searched for in `exec-path'
1288 (which see). If nil, just associate a pty with the buffer. Remaining
1289 arguments are strings to give program as arguments.
1291 If you want to separate standard output from standard error, invoke
1292 the command through a shell and redirect one of them using the shell
1295 usage: (start-process NAME BUFFER PROGRAM &rest PROGRAM-ARGS) */)
1296 (ptrdiff_t nargs
, Lisp_Object
*args
)
1298 Lisp_Object buffer
, name
, program
, proc
, current_dir
, tem
;
1299 register unsigned char **new_argv
;
1301 ptrdiff_t count
= SPECPDL_INDEX ();
1305 buffer
= Fget_buffer_create (buffer
);
1307 /* Make sure that the child will be able to chdir to the current
1308 buffer's current directory, or its unhandled equivalent. We
1309 can't just have the child check for an error when it does the
1310 chdir, since it's in a vfork.
1312 We have to GCPRO around this because Fexpand_file_name and
1313 Funhandled_file_name_directory might call a file name handling
1314 function. The argument list is protected by the caller, so all
1315 we really have to worry about is buffer. */
1317 struct gcpro gcpro1
, gcpro2
;
1319 current_dir
= BVAR (current_buffer
, directory
);
1321 GCPRO2 (buffer
, current_dir
);
1323 current_dir
= Funhandled_file_name_directory (current_dir
);
1324 if (NILP (current_dir
))
1325 /* If the file name handler says that current_dir is unreachable, use
1326 a sensible default. */
1327 current_dir
= build_string ("~/");
1328 current_dir
= expand_and_dir_to_file (current_dir
, Qnil
);
1329 if (NILP (Ffile_accessible_directory_p (current_dir
)))
1330 report_file_error ("Setting current directory",
1331 Fcons (BVAR (current_buffer
, directory
), Qnil
));
1337 CHECK_STRING (name
);
1341 if (!NILP (program
))
1342 CHECK_STRING (program
);
1344 proc
= make_process (name
);
1345 /* If an error occurs and we can't start the process, we want to
1346 remove it from the process list. This means that each error
1347 check in create_process doesn't need to call remove_process
1348 itself; it's all taken care of here. */
1349 record_unwind_protect (start_process_unwind
, proc
);
1351 XPROCESS (proc
)->childp
= Qt
;
1352 XPROCESS (proc
)->plist
= Qnil
;
1353 XPROCESS (proc
)->type
= Qreal
;
1354 XPROCESS (proc
)->buffer
= buffer
;
1355 XPROCESS (proc
)->sentinel
= Qnil
;
1356 XPROCESS (proc
)->filter
= Qnil
;
1357 XPROCESS (proc
)->command
= Flist (nargs
- 2, args
+ 2);
1360 /* AKA GNUTLS_INITSTAGE(proc). */
1361 XPROCESS (proc
)->gnutls_initstage
= GNUTLS_STAGE_EMPTY
;
1362 XPROCESS (proc
)->gnutls_cred_type
= Qnil
;
1365 #ifdef ADAPTIVE_READ_BUFFERING
1366 XPROCESS (proc
)->adaptive_read_buffering
1367 = (NILP (Vprocess_adaptive_read_buffering
) ? 0
1368 : EQ (Vprocess_adaptive_read_buffering
, Qt
) ? 1 : 2);
1371 /* Make the process marker point into the process buffer (if any). */
1372 if (BUFFERP (buffer
))
1373 set_marker_both (XPROCESS (proc
)->mark
, buffer
,
1374 BUF_ZV (XBUFFER (buffer
)),
1375 BUF_ZV_BYTE (XBUFFER (buffer
)));
1378 /* Decide coding systems for communicating with the process. Here
1379 we don't setup the structure coding_system nor pay attention to
1380 unibyte mode. They are done in create_process. */
1382 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
1383 Lisp_Object coding_systems
= Qt
;
1384 Lisp_Object val
, *args2
;
1385 struct gcpro gcpro1
, gcpro2
;
1387 val
= Vcoding_system_for_read
;
1390 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1391 args2
[0] = Qstart_process
;
1392 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1393 GCPRO2 (proc
, current_dir
);
1394 if (!NILP (program
))
1395 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1397 if (CONSP (coding_systems
))
1398 val
= XCAR (coding_systems
);
1399 else if (CONSP (Vdefault_process_coding_system
))
1400 val
= XCAR (Vdefault_process_coding_system
);
1402 XPROCESS (proc
)->decode_coding_system
= val
;
1404 val
= Vcoding_system_for_write
;
1407 if (EQ (coding_systems
, Qt
))
1409 args2
= (Lisp_Object
*) alloca ((nargs
+ 1) * sizeof *args2
);
1410 args2
[0] = Qstart_process
;
1411 for (i
= 0; i
< nargs
; i
++) args2
[i
+ 1] = args
[i
];
1412 GCPRO2 (proc
, current_dir
);
1413 if (!NILP (program
))
1414 coding_systems
= Ffind_operation_coding_system (nargs
+ 1, args2
);
1417 if (CONSP (coding_systems
))
1418 val
= XCDR (coding_systems
);
1419 else if (CONSP (Vdefault_process_coding_system
))
1420 val
= XCDR (Vdefault_process_coding_system
);
1422 XPROCESS (proc
)->encode_coding_system
= val
;
1423 /* Note: At this moment, the above coding system may leave
1424 text-conversion or eol-conversion unspecified. They will be
1425 decided after we read output from the process and decode it by
1426 some coding system, or just before we actually send a text to
1431 XPROCESS (proc
)->decoding_buf
= empty_unibyte_string
;
1432 XPROCESS (proc
)->decoding_carryover
= 0;
1433 XPROCESS (proc
)->encoding_buf
= empty_unibyte_string
;
1435 XPROCESS (proc
)->inherit_coding_system_flag
1436 = !(NILP (buffer
) || !inherit_process_coding_system
);
1438 if (!NILP (program
))
1440 /* If program file name is not absolute, search our path for it.
1441 Put the name we will really use in TEM. */
1442 if (!IS_DIRECTORY_SEP (SREF (program
, 0))
1443 && !(SCHARS (program
) > 1
1444 && IS_DEVICE_SEP (SREF (program
, 1))))
1446 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1449 GCPRO4 (name
, program
, buffer
, current_dir
);
1450 openp (Vexec_path
, program
, Vexec_suffixes
, &tem
, make_number (X_OK
));
1453 report_file_error ("Searching for program", Fcons (program
, Qnil
));
1454 tem
= Fexpand_file_name (tem
, Qnil
);
1458 if (!NILP (Ffile_directory_p (program
)))
1459 error ("Specified program for new process is a directory");
1463 /* If program file name starts with /: for quoting a magic name,
1465 if (SBYTES (tem
) > 2 && SREF (tem
, 0) == '/'
1466 && SREF (tem
, 1) == ':')
1467 tem
= Fsubstring (tem
, make_number (2), Qnil
);
1470 Lisp_Object arg_encoding
= Qnil
;
1471 struct gcpro gcpro1
;
1474 /* Encode the file name and put it in NEW_ARGV.
1475 That's where the child will use it to execute the program. */
1476 tem
= Fcons (ENCODE_FILE (tem
), Qnil
);
1478 /* Here we encode arguments by the coding system used for sending
1479 data to the process. We don't support using different coding
1480 systems for encoding arguments and for encoding data sent to the
1483 for (i
= 3; i
< nargs
; i
++)
1485 tem
= Fcons (args
[i
], tem
);
1486 CHECK_STRING (XCAR (tem
));
1487 if (STRING_MULTIBYTE (XCAR (tem
)))
1489 if (NILP (arg_encoding
))
1490 arg_encoding
= (complement_process_encoding_system
1491 (XPROCESS (proc
)->encode_coding_system
));
1493 code_convert_string_norecord
1494 (XCAR (tem
), arg_encoding
, 1));
1501 /* Now that everything is encoded we can collect the strings into
1503 new_argv
= (unsigned char **) alloca ((nargs
- 1) * sizeof (char *));
1504 new_argv
[nargs
- 2] = 0;
1506 for (i
= nargs
- 2; i
-- != 0; )
1508 new_argv
[i
] = SDATA (XCAR (tem
));
1512 create_process (proc
, (char **) new_argv
, current_dir
);
1517 return unbind_to (count
, proc
);
1520 /* This function is the unwind_protect form for Fstart_process. If
1521 PROC doesn't have its pid set, then we know someone has signaled
1522 an error and the process wasn't started successfully, so we should
1523 remove it from the process list. */
1525 start_process_unwind (Lisp_Object proc
)
1527 if (!PROCESSP (proc
))
1530 /* Was PROC started successfully?
1531 -2 is used for a pty with no process, eg for gdb. */
1532 if (XPROCESS (proc
)->pid
<= 0 && XPROCESS (proc
)->pid
!= -2)
1533 remove_process (proc
);
1539 create_process_1 (struct atimer
*timer
)
1541 /* Nothing to do. */
1546 create_process (Lisp_Object process
, char **new_argv
, Lisp_Object current_dir
)
1548 int inchannel
, outchannel
;
1551 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1552 int wait_child_setup
[2];
1556 struct sigaction sigint_action
;
1557 struct sigaction sigquit_action
;
1558 struct sigaction sigpipe_action
;
1560 struct sigaction sighup_action
;
1562 /* Use volatile to protect variables from being clobbered by longjmp. */
1563 volatile int forkin
, forkout
;
1564 volatile int pty_flag
= 0;
1566 extern char **environ
;
1569 inchannel
= outchannel
= -1;
1572 if (!NILP (Vprocess_connection_type
))
1573 outchannel
= inchannel
= allocate_pty ();
1577 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1578 /* On most USG systems it does not work to open the pty's tty here,
1579 then close it and reopen it in the child. */
1581 /* Don't let this terminal become our controlling terminal
1582 (in case we don't have one). */
1583 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1585 forkout
= forkin
= emacs_open (pty_name
, O_RDWR
, 0);
1588 report_file_error ("Opening pty", Qnil
);
1590 forkin
= forkout
= -1;
1591 #endif /* not USG, or USG_SUBTTY_WORKS */
1595 #endif /* HAVE_PTYS */
1600 report_file_error ("Creating pipe", Qnil
);
1606 emacs_close (inchannel
);
1607 emacs_close (forkout
);
1608 report_file_error ("Creating pipe", Qnil
);
1614 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1618 tem
= pipe (wait_child_setup
);
1620 report_file_error ("Creating pipe", Qnil
);
1621 tem
= fcntl (wait_child_setup
[1], F_GETFD
, 0);
1623 tem
= fcntl (wait_child_setup
[1], F_SETFD
, tem
| FD_CLOEXEC
);
1626 emacs_close (wait_child_setup
[0]);
1627 emacs_close (wait_child_setup
[1]);
1628 report_file_error ("Setting file descriptor flags", Qnil
);
1634 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1635 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1638 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1639 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1643 /* Record this as an active process, with its channels.
1644 As a result, child_setup will close Emacs's side of the pipes. */
1645 chan_process
[inchannel
] = process
;
1646 XPROCESS (process
)->infd
= inchannel
;
1647 XPROCESS (process
)->outfd
= outchannel
;
1649 /* Previously we recorded the tty descriptor used in the subprocess.
1650 It was only used for getting the foreground tty process, so now
1651 we just reopen the device (see emacs_get_tty_pgrp) as this is
1652 more portable (see USG_SUBTTY_WORKS above). */
1654 XPROCESS (process
)->pty_flag
= pty_flag
;
1655 XPROCESS (process
)->status
= Qrun
;
1657 /* Delay interrupts until we have a chance to store
1658 the new fork's pid in its process structure */
1659 sigemptyset (&blocked
);
1661 sigaddset (&blocked
, SIGCHLD
);
1663 #ifdef HAVE_WORKING_VFORK
1664 /* On many hosts (e.g. Solaris 2.4), if a vforked child calls `signal',
1665 this sets the parent's signal handlers as well as the child's.
1666 So delay all interrupts whose handlers the child might munge,
1667 and record the current handlers so they can be restored later. */
1668 sigaddset (&blocked
, SIGINT
); sigaction (SIGINT
, 0, &sigint_action
);
1669 sigaddset (&blocked
, SIGQUIT
); sigaction (SIGQUIT
, 0, &sigquit_action
);
1670 sigaddset (&blocked
, SIGPIPE
); sigaction (SIGPIPE
, 0, &sigpipe_action
);
1672 sigaddset (&blocked
, SIGHUP
); sigaction (SIGHUP
, 0, &sighup_action
);
1674 #endif /* HAVE_WORKING_VFORK */
1675 pthread_sigmask (SIG_BLOCK
, &blocked
, &procmask
);
1677 FD_SET (inchannel
, &input_wait_mask
);
1678 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1679 if (inchannel
> max_process_desc
)
1680 max_process_desc
= inchannel
;
1682 /* Until we store the proper pid, enable sigchld_handler
1683 to recognize an unknown pid as standing for this process.
1684 It is very important not to let this `marker' value stay
1685 in the table after this function has returned; if it does
1686 it might cause call-process to hang and subsequent asynchronous
1687 processes to get their return values scrambled. */
1688 XPROCESS (process
)->pid
= -1;
1690 /* This must be called after the above line because it may signal an
1692 setup_process_coding_systems (process
);
1697 /* child_setup must clobber environ on systems with true vfork.
1698 Protect it from permanent change. */
1699 char **save_environ
= environ
;
1700 volatile Lisp_Object encoded_current_dir
= ENCODE_FILE (current_dir
);
1705 #endif /* not WINDOWSNT */
1707 int xforkin
= forkin
;
1708 int xforkout
= forkout
;
1710 #if 0 /* This was probably a mistake--it duplicates code later on,
1711 but fails to handle all the cases. */
1712 /* Make sure SIGCHLD is not blocked in the child. */
1713 sigsetmask (SIGEMPTYMASK
);
1716 /* Make the pty be the controlling terminal of the process. */
1718 /* First, disconnect its current controlling terminal. */
1720 /* We tried doing setsid only if pty_flag, but it caused
1721 process_set_signal to fail on SGI when using a pipe. */
1723 /* Make the pty's terminal the controlling terminal. */
1724 if (pty_flag
&& xforkin
>= 0)
1727 /* We ignore the return value
1728 because faith@cs.unc.edu says that is necessary on Linux. */
1729 ioctl (xforkin
, TIOCSCTTY
, 0);
1732 #else /* not HAVE_SETSID */
1734 /* It's very important to call setpgrp here and no time
1735 afterwards. Otherwise, we lose our controlling tty which
1736 is set when we open the pty. */
1739 #endif /* not HAVE_SETSID */
1740 #if defined (LDISC1)
1741 if (pty_flag
&& xforkin
>= 0)
1744 tcgetattr (xforkin
, &t
);
1746 if (tcsetattr (xforkin
, TCSANOW
, &t
) < 0)
1747 emacs_write (1, "create_process/tcsetattr LDISC1 failed\n", 39);
1750 #if defined (NTTYDISC) && defined (TIOCSETD)
1751 if (pty_flag
&& xforkin
>= 0)
1753 /* Use new line discipline. */
1754 int ldisc
= NTTYDISC
;
1755 ioctl (xforkin
, TIOCSETD
, &ldisc
);
1760 /* In 4.3BSD, the TIOCSPGRP bug has been fixed, and now you
1761 can do TIOCSPGRP only to the process's controlling tty. */
1764 /* I wonder: would just ioctl (0, TIOCNOTTY, 0) work here?
1765 I can't test it since I don't have 4.3. */
1766 int j
= emacs_open ("/dev/tty", O_RDWR
, 0);
1769 ioctl (j
, TIOCNOTTY
, 0);
1773 /* In order to get a controlling terminal on some versions
1774 of BSD, it is necessary to put the process in pgrp 0
1775 before it opens the terminal. */
1783 #endif /* TIOCNOTTY */
1785 #if !defined (DONT_REOPEN_PTY)
1786 /*** There is a suggestion that this ought to be a
1787 conditional on TIOCSPGRP,
1788 or !(defined (HAVE_SETSID) && defined (TIOCSCTTY)).
1789 Trying the latter gave the wrong results on Debian GNU/Linux 1.1;
1790 that system does seem to need this code, even though
1791 both HAVE_SETSID and TIOCSCTTY are defined. */
1792 /* Now close the pty (if we had it open) and reopen it.
1793 This makes the pty the controlling terminal of the subprocess. */
1797 /* I wonder if emacs_close (emacs_open (pty_name, ...))
1800 emacs_close (xforkin
);
1801 xforkout
= xforkin
= emacs_open (pty_name
, O_RDWR
, 0);
1805 emacs_write (1, "Couldn't open the pty terminal ", 31);
1806 emacs_write (1, pty_name
, strlen (pty_name
));
1807 emacs_write (1, "\n", 1);
1812 #endif /* not DONT_REOPEN_PTY */
1814 #ifdef SETUP_SLAVE_PTY
1819 #endif /* SETUP_SLAVE_PTY */
1821 /* On AIX, we've disabled SIGHUP above once we start a child on a pty.
1822 Now reenable it in the child, so it will die when we want it to. */
1824 signal (SIGHUP
, SIG_DFL
);
1826 #endif /* HAVE_PTYS */
1828 signal (SIGINT
, SIG_DFL
);
1829 signal (SIGQUIT
, SIG_DFL
);
1830 /* GConf causes us to ignore SIGPIPE, make sure it is restored
1832 signal (SIGPIPE
, SIG_DFL
);
1834 /* Stop blocking signals in the child. */
1835 pthread_sigmask (SIG_SETMASK
, &procmask
, 0);
1838 child_setup_tty (xforkout
);
1840 pid
= child_setup (xforkin
, xforkout
, xforkout
,
1841 new_argv
, 1, encoded_current_dir
);
1842 #else /* not WINDOWSNT */
1844 emacs_close (wait_child_setup
[0]);
1846 child_setup (xforkin
, xforkout
, xforkout
,
1847 new_argv
, 1, encoded_current_dir
);
1848 #endif /* not WINDOWSNT */
1850 environ
= save_environ
;
1855 /* This runs in the Emacs process. */
1859 emacs_close (forkin
);
1860 if (forkin
!= forkout
&& forkout
>= 0)
1861 emacs_close (forkout
);
1865 /* vfork succeeded. */
1866 XPROCESS (process
)->pid
= pid
;
1869 register_child (pid
, inchannel
);
1870 #endif /* WINDOWSNT */
1872 /* If the subfork execv fails, and it exits,
1873 this close hangs. I don't know why.
1874 So have an interrupt jar it loose. */
1876 struct atimer
*timer
;
1880 EMACS_SET_SECS_USECS (offset
, 1, 0);
1881 timer
= start_atimer (ATIMER_RELATIVE
, offset
, create_process_1
, 0);
1884 emacs_close (forkin
);
1886 cancel_atimer (timer
);
1890 if (forkin
!= forkout
&& forkout
>= 0)
1891 emacs_close (forkout
);
1895 XPROCESS (process
)->tty_name
= build_string (pty_name
);
1898 XPROCESS (process
)->tty_name
= Qnil
;
1900 #if !defined (WINDOWSNT) && defined (FD_CLOEXEC)
1901 /* Wait for child_setup to complete in case that vfork is
1902 actually defined as fork. The descriptor wait_child_setup[1]
1903 of a pipe is closed at the child side either by close-on-exec
1904 on successful execvp or the _exit call in child_setup. */
1908 emacs_close (wait_child_setup
[1]);
1909 emacs_read (wait_child_setup
[0], &dummy
, 1);
1910 emacs_close (wait_child_setup
[0]);
1915 /* Restore the signal state whether vfork succeeded or not.
1916 (We will signal an error, below, if it failed.) */
1917 #ifdef HAVE_WORKING_VFORK
1918 /* Restore the parent's signal handlers. */
1919 sigaction (SIGINT
, &sigint_action
, 0);
1920 sigaction (SIGQUIT
, &sigquit_action
, 0);
1921 sigaction (SIGPIPE
, &sigpipe_action
, 0);
1923 sigaction (SIGHUP
, &sighup_action
, 0);
1925 #endif /* HAVE_WORKING_VFORK */
1926 /* Stop blocking signals in the parent. */
1927 pthread_sigmask (SIG_SETMASK
, &procmask
, 0);
1929 /* Now generate the error if vfork failed. */
1931 report_file_error ("Doing vfork", Qnil
);
1935 create_pty (Lisp_Object process
)
1937 int inchannel
, outchannel
;
1940 inchannel
= outchannel
= -1;
1943 if (!NILP (Vprocess_connection_type
))
1944 outchannel
= inchannel
= allocate_pty ();
1948 #if ! defined (USG) || defined (USG_SUBTTY_WORKS)
1949 /* On most USG systems it does not work to open the pty's tty here,
1950 then close it and reopen it in the child. */
1952 /* Don't let this terminal become our controlling terminal
1953 (in case we don't have one). */
1954 int forkout
= emacs_open (pty_name
, O_RDWR
| O_NOCTTY
, 0);
1956 int forkout
= emacs_open (pty_name
, O_RDWR
, 0);
1959 report_file_error ("Opening pty", Qnil
);
1960 #if defined (DONT_REOPEN_PTY)
1961 /* In the case that vfork is defined as fork, the parent process
1962 (Emacs) may send some data before the child process completes
1963 tty options setup. So we setup tty before forking. */
1964 child_setup_tty (forkout
);
1965 #endif /* DONT_REOPEN_PTY */
1966 #endif /* not USG, or USG_SUBTTY_WORKS */
1969 #endif /* HAVE_PTYS */
1972 fcntl (inchannel
, F_SETFL
, O_NONBLOCK
);
1973 fcntl (outchannel
, F_SETFL
, O_NONBLOCK
);
1976 fcntl (inchannel
, F_SETFL
, O_NDELAY
);
1977 fcntl (outchannel
, F_SETFL
, O_NDELAY
);
1981 /* Record this as an active process, with its channels.
1982 As a result, child_setup will close Emacs's side of the pipes. */
1983 chan_process
[inchannel
] = process
;
1984 XPROCESS (process
)->infd
= inchannel
;
1985 XPROCESS (process
)->outfd
= outchannel
;
1987 /* Previously we recorded the tty descriptor used in the subprocess.
1988 It was only used for getting the foreground tty process, so now
1989 we just reopen the device (see emacs_get_tty_pgrp) as this is
1990 more portable (see USG_SUBTTY_WORKS above). */
1992 XPROCESS (process
)->pty_flag
= pty_flag
;
1993 XPROCESS (process
)->status
= Qrun
;
1994 setup_process_coding_systems (process
);
1996 FD_SET (inchannel
, &input_wait_mask
);
1997 FD_SET (inchannel
, &non_keyboard_wait_mask
);
1998 if (inchannel
> max_process_desc
)
1999 max_process_desc
= inchannel
;
2001 XPROCESS (process
)->pid
= -2;
2004 XPROCESS (process
)->tty_name
= build_string (pty_name
);
2007 XPROCESS (process
)->tty_name
= Qnil
;
2011 /* Convert an internal struct sockaddr to a lisp object (vector or string).
2012 The address family of sa is not included in the result. */
2015 conv_sockaddr_to_lisp (struct sockaddr
*sa
, int len
)
2017 Lisp_Object address
;
2020 register struct Lisp_Vector
*p
;
2022 /* Workaround for a bug in getsockname on BSD: Names bound to
2023 sockets in the UNIX domain are inaccessible; getsockname returns
2024 a zero length name. */
2025 if (len
< offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
))
2026 return empty_unibyte_string
;
2028 switch (sa
->sa_family
)
2032 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2033 len
= sizeof (sin
->sin_addr
) + 1;
2034 address
= Fmake_vector (make_number (len
), Qnil
);
2035 p
= XVECTOR (address
);
2036 p
->contents
[--len
] = make_number (ntohs (sin
->sin_port
));
2037 cp
= (unsigned char *) &sin
->sin_addr
;
2043 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2044 uint16_t *ip6
= (uint16_t *) &sin6
->sin6_addr
;
2045 len
= sizeof (sin6
->sin6_addr
)/2 + 1;
2046 address
= Fmake_vector (make_number (len
), Qnil
);
2047 p
= XVECTOR (address
);
2048 p
->contents
[--len
] = make_number (ntohs (sin6
->sin6_port
));
2049 for (i
= 0; i
< len
; i
++)
2050 p
->contents
[i
] = make_number (ntohs (ip6
[i
]));
2054 #ifdef HAVE_LOCAL_SOCKETS
2057 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2058 for (i
= 0; i
< sizeof (sockun
->sun_path
); i
++)
2059 if (sockun
->sun_path
[i
] == 0)
2061 return make_unibyte_string (sockun
->sun_path
, i
);
2065 len
-= offsetof (struct sockaddr
, sa_family
) + sizeof (sa
->sa_family
);
2066 address
= Fcons (make_number (sa
->sa_family
),
2067 Fmake_vector (make_number (len
), Qnil
));
2068 p
= XVECTOR (XCDR (address
));
2069 cp
= (unsigned char *) &sa
->sa_family
+ sizeof (sa
->sa_family
);
2075 p
->contents
[i
++] = make_number (*cp
++);
2081 /* Get family and required size for sockaddr structure to hold ADDRESS. */
2084 get_lisp_to_sockaddr_size (Lisp_Object address
, int *familyp
)
2086 register struct Lisp_Vector
*p
;
2088 if (VECTORP (address
))
2090 p
= XVECTOR (address
);
2091 if (p
->header
.size
== 5)
2094 return sizeof (struct sockaddr_in
);
2097 else if (p
->header
.size
== 9)
2099 *familyp
= AF_INET6
;
2100 return sizeof (struct sockaddr_in6
);
2104 #ifdef HAVE_LOCAL_SOCKETS
2105 else if (STRINGP (address
))
2107 *familyp
= AF_LOCAL
;
2108 return sizeof (struct sockaddr_un
);
2111 else if (CONSP (address
) && TYPE_RANGED_INTEGERP (int, XCAR (address
))
2112 && VECTORP (XCDR (address
)))
2114 struct sockaddr
*sa
;
2115 *familyp
= XINT (XCAR (address
));
2116 p
= XVECTOR (XCDR (address
));
2117 return p
->header
.size
+ sizeof (sa
->sa_family
);
2122 /* Convert an address object (vector or string) to an internal sockaddr.
2124 The address format has been basically validated by
2125 get_lisp_to_sockaddr_size, but this does not mean FAMILY is valid;
2126 it could have come from user data. So if FAMILY is not valid,
2127 we return after zeroing *SA. */
2130 conv_lisp_to_sockaddr (int family
, Lisp_Object address
, struct sockaddr
*sa
, int len
)
2132 register struct Lisp_Vector
*p
;
2133 register unsigned char *cp
= NULL
;
2137 memset (sa
, 0, len
);
2139 if (VECTORP (address
))
2141 p
= XVECTOR (address
);
2142 if (family
== AF_INET
)
2144 struct sockaddr_in
*sin
= (struct sockaddr_in
*) sa
;
2145 len
= sizeof (sin
->sin_addr
) + 1;
2146 hostport
= XINT (p
->contents
[--len
]);
2147 sin
->sin_port
= htons (hostport
);
2148 cp
= (unsigned char *)&sin
->sin_addr
;
2149 sa
->sa_family
= family
;
2152 else if (family
== AF_INET6
)
2154 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) sa
;
2155 uint16_t *ip6
= (uint16_t *)&sin6
->sin6_addr
;
2156 len
= sizeof (sin6
->sin6_addr
) + 1;
2157 hostport
= XINT (p
->contents
[--len
]);
2158 sin6
->sin6_port
= htons (hostport
);
2159 for (i
= 0; i
< len
; i
++)
2160 if (INTEGERP (p
->contents
[i
]))
2162 int j
= XFASTINT (p
->contents
[i
]) & 0xffff;
2165 sa
->sa_family
= family
;
2172 else if (STRINGP (address
))
2174 #ifdef HAVE_LOCAL_SOCKETS
2175 if (family
== AF_LOCAL
)
2177 struct sockaddr_un
*sockun
= (struct sockaddr_un
*) sa
;
2178 cp
= SDATA (address
);
2179 for (i
= 0; i
< sizeof (sockun
->sun_path
) && *cp
; i
++)
2180 sockun
->sun_path
[i
] = *cp
++;
2181 sa
->sa_family
= family
;
2188 p
= XVECTOR (XCDR (address
));
2189 cp
= (unsigned char *)sa
+ sizeof (sa
->sa_family
);
2192 for (i
= 0; i
< len
; i
++)
2193 if (INTEGERP (p
->contents
[i
]))
2194 *cp
++ = XFASTINT (p
->contents
[i
]) & 0xff;
2197 #ifdef DATAGRAM_SOCKETS
2198 DEFUN ("process-datagram-address", Fprocess_datagram_address
, Sprocess_datagram_address
,
2200 doc
: /* Get the current datagram address associated with PROCESS. */)
2201 (Lisp_Object process
)
2205 CHECK_PROCESS (process
);
2207 if (!DATAGRAM_CONN_P (process
))
2210 channel
= XPROCESS (process
)->infd
;
2211 return conv_sockaddr_to_lisp (datagram_address
[channel
].sa
,
2212 datagram_address
[channel
].len
);
2215 DEFUN ("set-process-datagram-address", Fset_process_datagram_address
, Sset_process_datagram_address
,
2217 doc
: /* Set the datagram address for PROCESS to ADDRESS.
2218 Returns nil upon error setting address, ADDRESS otherwise. */)
2219 (Lisp_Object process
, Lisp_Object address
)
2224 CHECK_PROCESS (process
);
2226 if (!DATAGRAM_CONN_P (process
))
2229 channel
= XPROCESS (process
)->infd
;
2231 len
= get_lisp_to_sockaddr_size (address
, &family
);
2232 if (datagram_address
[channel
].len
!= len
)
2234 conv_lisp_to_sockaddr (family
, address
, datagram_address
[channel
].sa
, len
);
2240 static const struct socket_options
{
2241 /* The name of this option. Should be lowercase version of option
2242 name without SO_ prefix. */
2244 /* Option level SOL_... */
2246 /* Option number SO_... */
2248 enum { SOPT_UNKNOWN
, SOPT_BOOL
, SOPT_INT
, SOPT_IFNAME
, SOPT_LINGER
} opttype
;
2249 enum { OPIX_NONE
=0, OPIX_MISC
=1, OPIX_REUSEADDR
=2 } optbit
;
2250 } socket_options
[] =
2252 #ifdef SO_BINDTODEVICE
2253 { ":bindtodevice", SOL_SOCKET
, SO_BINDTODEVICE
, SOPT_IFNAME
, OPIX_MISC
},
2256 { ":broadcast", SOL_SOCKET
, SO_BROADCAST
, SOPT_BOOL
, OPIX_MISC
},
2259 { ":dontroute", SOL_SOCKET
, SO_DONTROUTE
, SOPT_BOOL
, OPIX_MISC
},
2262 { ":keepalive", SOL_SOCKET
, SO_KEEPALIVE
, SOPT_BOOL
, OPIX_MISC
},
2265 { ":linger", SOL_SOCKET
, SO_LINGER
, SOPT_LINGER
, OPIX_MISC
},
2268 { ":oobinline", SOL_SOCKET
, SO_OOBINLINE
, SOPT_BOOL
, OPIX_MISC
},
2271 { ":priority", SOL_SOCKET
, SO_PRIORITY
, SOPT_INT
, OPIX_MISC
},
2274 { ":reuseaddr", SOL_SOCKET
, SO_REUSEADDR
, SOPT_BOOL
, OPIX_REUSEADDR
},
2276 { 0, 0, 0, SOPT_UNKNOWN
, OPIX_NONE
}
2279 /* Set option OPT to value VAL on socket S.
2281 Returns (1<<socket_options[OPT].optbit) if option is known, 0 otherwise.
2282 Signals an error if setting a known option fails.
2286 set_socket_option (int s
, Lisp_Object opt
, Lisp_Object val
)
2289 const struct socket_options
*sopt
;
2294 name
= SSDATA (SYMBOL_NAME (opt
));
2295 for (sopt
= socket_options
; sopt
->name
; sopt
++)
2296 if (strcmp (name
, sopt
->name
) == 0)
2299 switch (sopt
->opttype
)
2304 optval
= NILP (val
) ? 0 : 1;
2305 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2306 &optval
, sizeof (optval
));
2313 if (TYPE_RANGED_INTEGERP (int, val
))
2314 optval
= XINT (val
);
2316 error ("Bad option value for %s", name
);
2317 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2318 &optval
, sizeof (optval
));
2322 #ifdef SO_BINDTODEVICE
2325 char devname
[IFNAMSIZ
+1];
2327 /* This is broken, at least in the Linux 2.4 kernel.
2328 To unbind, the arg must be a zero integer, not the empty string.
2329 This should work on all systems. KFS. 2003-09-23. */
2330 memset (devname
, 0, sizeof devname
);
2333 char *arg
= SSDATA (val
);
2334 int len
= min (strlen (arg
), IFNAMSIZ
);
2335 memcpy (devname
, arg
, len
);
2337 else if (!NILP (val
))
2338 error ("Bad option value for %s", name
);
2339 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2348 struct linger linger
;
2351 linger
.l_linger
= 0;
2352 if (TYPE_RANGED_INTEGERP (int, val
))
2353 linger
.l_linger
= XINT (val
);
2355 linger
.l_onoff
= NILP (val
) ? 0 : 1;
2356 ret
= setsockopt (s
, sopt
->optlevel
, sopt
->optnum
,
2357 &linger
, sizeof (linger
));
2367 report_file_error ("Cannot set network option",
2368 Fcons (opt
, Fcons (val
, Qnil
)));
2369 return (1 << sopt
->optbit
);
2373 DEFUN ("set-network-process-option",
2374 Fset_network_process_option
, Sset_network_process_option
,
2376 doc
: /* For network process PROCESS set option OPTION to value VALUE.
2377 See `make-network-process' for a list of options and values.
2378 If optional fourth arg NO-ERROR is non-nil, don't signal an error if
2379 OPTION is not a supported option, return nil instead; otherwise return t. */)
2380 (Lisp_Object process
, Lisp_Object option
, Lisp_Object value
, Lisp_Object no_error
)
2383 struct Lisp_Process
*p
;
2385 CHECK_PROCESS (process
);
2386 p
= XPROCESS (process
);
2387 if (!NETCONN1_P (p
))
2388 error ("Process is not a network process");
2392 error ("Process is not running");
2394 if (set_socket_option (s
, option
, value
))
2396 p
->childp
= Fplist_put (p
->childp
, option
, value
);
2400 if (NILP (no_error
))
2401 error ("Unknown or unsupported option");
2407 DEFUN ("serial-process-configure",
2408 Fserial_process_configure
,
2409 Sserial_process_configure
,
2411 doc
: /* Configure speed, bytesize, etc. of a serial process.
2413 Arguments are specified as keyword/argument pairs. Attributes that
2414 are not given are re-initialized from the process's current
2415 configuration (available via the function `process-contact') or set to
2416 reasonable default values. The following arguments are defined:
2422 -- Any of these arguments can be given to identify the process that is
2423 to be configured. If none of these arguments is given, the current
2424 buffer's process is used.
2426 :speed SPEED -- SPEED is the speed of the serial port in bits per
2427 second, also called baud rate. Any value can be given for SPEED, but
2428 most serial ports work only at a few defined values between 1200 and
2429 115200, with 9600 being the most common value. If SPEED is nil, the
2430 serial port is not configured any further, i.e., all other arguments
2431 are ignored. This may be useful for special serial ports such as
2432 Bluetooth-to-serial converters which can only be configured through AT
2433 commands. A value of nil for SPEED can be used only when passed
2434 through `make-serial-process' or `serial-term'.
2436 :bytesize BYTESIZE -- BYTESIZE is the number of bits per byte, which
2437 can be 7 or 8. If BYTESIZE is not given or nil, a value of 8 is used.
2439 :parity PARITY -- PARITY can be nil (don't use parity), the symbol
2440 `odd' (use odd parity), or the symbol `even' (use even parity). If
2441 PARITY is not given, no parity is used.
2443 :stopbits STOPBITS -- STOPBITS is the number of stopbits used to
2444 terminate a byte transmission. STOPBITS can be 1 or 2. If STOPBITS
2445 is not given or nil, 1 stopbit is used.
2447 :flowcontrol FLOWCONTROL -- FLOWCONTROL determines the type of
2448 flowcontrol to be used, which is either nil (don't use flowcontrol),
2449 the symbol `hw' (use RTS/CTS hardware flowcontrol), or the symbol `sw'
2450 \(use XON/XOFF software flowcontrol). If FLOWCONTROL is not given, no
2451 flowcontrol is used.
2453 `serial-process-configure' is called by `make-serial-process' for the
2454 initial configuration of the serial port.
2458 \(serial-process-configure :process "/dev/ttyS0" :speed 1200)
2460 \(serial-process-configure
2461 :buffer "COM1" :stopbits 1 :parity 'odd :flowcontrol 'hw)
2463 \(serial-process-configure :port "\\\\.\\COM13" :bytesize 7)
2465 usage: (serial-process-configure &rest ARGS) */)
2466 (ptrdiff_t nargs
, Lisp_Object
*args
)
2468 struct Lisp_Process
*p
;
2469 Lisp_Object contact
= Qnil
;
2470 Lisp_Object proc
= Qnil
;
2471 struct gcpro gcpro1
;
2473 contact
= Flist (nargs
, args
);
2476 proc
= Fplist_get (contact
, QCprocess
);
2478 proc
= Fplist_get (contact
, QCname
);
2480 proc
= Fplist_get (contact
, QCbuffer
);
2482 proc
= Fplist_get (contact
, QCport
);
2483 proc
= get_process (proc
);
2484 p
= XPROCESS (proc
);
2485 if (!EQ (p
->type
, Qserial
))
2486 error ("Not a serial process");
2488 if (NILP (Fplist_get (p
->childp
, QCspeed
)))
2494 serial_configure (p
, contact
);
2500 /* Used by make-serial-process to recover from errors. */
2502 make_serial_process_unwind (Lisp_Object proc
)
2504 if (!PROCESSP (proc
))
2506 remove_process (proc
);
2510 DEFUN ("make-serial-process", Fmake_serial_process
, Smake_serial_process
,
2512 doc
: /* Create and return a serial port process.
2514 In Emacs, serial port connections are represented by process objects,
2515 so input and output work as for subprocesses, and `delete-process'
2516 closes a serial port connection. However, a serial process has no
2517 process id, it cannot be signaled, and the status codes are different
2518 from normal processes.
2520 `make-serial-process' creates a process and a buffer, on which you
2521 probably want to use `process-send-string'. Try \\[serial-term] for
2522 an interactive terminal. See below for examples.
2524 Arguments are specified as keyword/argument pairs. The following
2525 arguments are defined:
2527 :port PORT -- (mandatory) PORT is the path or name of the serial port.
2528 For example, this could be "/dev/ttyS0" on Unix. On Windows, this
2529 could be "COM1", or "\\\\.\\COM10" for ports higher than COM9 (double
2530 the backslashes in strings).
2532 :speed SPEED -- (mandatory) is handled by `serial-process-configure',
2533 which this function calls.
2535 :name NAME -- NAME is the name of the process. If NAME is not given,
2536 the value of PORT is used.
2538 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2539 with the process. Process output goes at the end of that buffer,
2540 unless you specify an output stream or filter function to handle the
2541 output. If BUFFER is not given, the value of NAME is used.
2543 :coding CODING -- If CODING is a symbol, it specifies the coding
2544 system used for both reading and writing for this process. If CODING
2545 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2546 ENCODING is used for writing.
2548 :noquery BOOL -- When exiting Emacs, query the user if BOOL is nil and
2549 the process is running. If BOOL is not given, query before exiting.
2551 :stop BOOL -- Start process in the `stopped' state if BOOL is non-nil.
2552 In the stopped state, a serial process does not accept incoming data,
2553 but you can send outgoing data. The stopped state is cleared by
2554 `continue-process' and set by `stop-process'.
2556 :filter FILTER -- Install FILTER as the process filter.
2558 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2560 :plist PLIST -- Install PLIST as the initial plist of the process.
2566 -- This function calls `serial-process-configure' to handle these
2569 The original argument list, possibly modified by later configuration,
2570 is available via the function `process-contact'.
2574 \(make-serial-process :port "/dev/ttyS0" :speed 9600)
2576 \(make-serial-process :port "COM1" :speed 115200 :stopbits 2)
2578 \(make-serial-process :port "\\\\.\\COM13" :speed 1200 :bytesize 7 :parity 'odd)
2580 \(make-serial-process :port "/dev/tty.BlueConsole-SPP-1" :speed nil)
2582 usage: (make-serial-process &rest ARGS) */)
2583 (ptrdiff_t nargs
, Lisp_Object
*args
)
2586 Lisp_Object proc
, contact
, port
;
2587 struct Lisp_Process
*p
;
2588 struct gcpro gcpro1
;
2589 Lisp_Object name
, buffer
;
2590 Lisp_Object tem
, val
;
2591 ptrdiff_t specpdl_count
= -1;
2596 contact
= Flist (nargs
, args
);
2599 port
= Fplist_get (contact
, QCport
);
2601 error ("No port specified");
2602 CHECK_STRING (port
);
2604 if (NILP (Fplist_member (contact
, QCspeed
)))
2605 error (":speed not specified");
2606 if (!NILP (Fplist_get (contact
, QCspeed
)))
2607 CHECK_NUMBER (Fplist_get (contact
, QCspeed
));
2609 name
= Fplist_get (contact
, QCname
);
2612 CHECK_STRING (name
);
2613 proc
= make_process (name
);
2614 specpdl_count
= SPECPDL_INDEX ();
2615 record_unwind_protect (make_serial_process_unwind
, proc
);
2616 p
= XPROCESS (proc
);
2618 fd
= serial_open (SSDATA (port
));
2621 if (fd
> max_process_desc
)
2622 max_process_desc
= fd
;
2623 chan_process
[fd
] = proc
;
2625 buffer
= Fplist_get (contact
, QCbuffer
);
2628 buffer
= Fget_buffer_create (buffer
);
2631 p
->childp
= contact
;
2632 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
2634 p
->sentinel
= Fplist_get (contact
, QCsentinel
);
2635 p
->filter
= Fplist_get (contact
, QCfilter
);
2637 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
2638 p
->kill_without_query
= 1;
2639 if (tem
= Fplist_get (contact
, QCstop
), !NILP (tem
))
2643 if (!EQ (p
->command
, Qt
))
2645 FD_SET (fd
, &input_wait_mask
);
2646 FD_SET (fd
, &non_keyboard_wait_mask
);
2649 if (BUFFERP (buffer
))
2651 set_marker_both (p
->mark
, buffer
,
2652 BUF_ZV (XBUFFER (buffer
)),
2653 BUF_ZV_BYTE (XBUFFER (buffer
)));
2656 tem
= Fplist_member (contact
, QCcoding
);
2657 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
2663 val
= XCAR (XCDR (tem
));
2667 else if (!NILP (Vcoding_system_for_read
))
2668 val
= Vcoding_system_for_read
;
2669 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2670 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2672 p
->decode_coding_system
= val
;
2677 val
= XCAR (XCDR (tem
));
2681 else if (!NILP (Vcoding_system_for_write
))
2682 val
= Vcoding_system_for_write
;
2683 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
2684 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
2686 p
->encode_coding_system
= val
;
2688 setup_process_coding_systems (proc
);
2689 p
->decoding_buf
= empty_unibyte_string
;
2690 p
->decoding_carryover
= 0;
2691 p
->encoding_buf
= empty_unibyte_string
;
2692 p
->inherit_coding_system_flag
2693 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
2695 Fserial_process_configure (nargs
, args
);
2697 specpdl_ptr
= specpdl
+ specpdl_count
;
2703 /* Create a network stream/datagram client/server process. Treated
2704 exactly like a normal process when reading and writing. Primary
2705 differences are in status display and process deletion. A network
2706 connection has no PID; you cannot signal it. All you can do is
2707 stop/continue it and deactivate/close it via delete-process */
2709 DEFUN ("make-network-process", Fmake_network_process
, Smake_network_process
,
2711 doc
: /* Create and return a network server or client process.
2713 In Emacs, network connections are represented by process objects, so
2714 input and output work as for subprocesses and `delete-process' closes
2715 a network connection. However, a network process has no process id,
2716 it cannot be signaled, and the status codes are different from normal
2719 Arguments are specified as keyword/argument pairs. The following
2720 arguments are defined:
2722 :name NAME -- NAME is name for process. It is modified if necessary
2725 :buffer BUFFER -- BUFFER is the buffer (or buffer-name) to associate
2726 with the process. Process output goes at end of that buffer, unless
2727 you specify an output stream or filter function to handle the output.
2728 BUFFER may be also nil, meaning that this process is not associated
2731 :host HOST -- HOST is name of the host to connect to, or its IP
2732 address. The symbol `local' specifies the local host. If specified
2733 for a server process, it must be a valid name or address for the local
2734 host, and only clients connecting to that address will be accepted.
2736 :service SERVICE -- SERVICE is name of the service desired, or an
2737 integer specifying a port number to connect to. If SERVICE is t,
2738 a random port number is selected for the server. (If Emacs was
2739 compiled with getaddrinfo, a port number can also be specified as a
2740 string, e.g. "80", as well as an integer. This is not portable.)
2742 :type TYPE -- TYPE is the type of connection. The default (nil) is a
2743 stream type connection, `datagram' creates a datagram type connection,
2744 `seqpacket' creates a reliable datagram connection.
2746 :family FAMILY -- FAMILY is the address (and protocol) family for the
2747 service specified by HOST and SERVICE. The default (nil) is to use
2748 whatever address family (IPv4 or IPv6) that is defined for the host
2749 and port number specified by HOST and SERVICE. Other address families
2751 local -- for a local (i.e. UNIX) address specified by SERVICE.
2752 ipv4 -- use IPv4 address family only.
2753 ipv6 -- use IPv6 address family only.
2755 :local ADDRESS -- ADDRESS is the local address used for the connection.
2756 This parameter is ignored when opening a client process. When specified
2757 for a server process, the FAMILY, HOST and SERVICE args are ignored.
2759 :remote ADDRESS -- ADDRESS is the remote partner's address for the
2760 connection. This parameter is ignored when opening a stream server
2761 process. For a datagram server process, it specifies the initial
2762 setting of the remote datagram address. When specified for a client
2763 process, the FAMILY, HOST, and SERVICE args are ignored.
2765 The format of ADDRESS depends on the address family:
2766 - An IPv4 address is represented as an vector of integers [A B C D P]
2767 corresponding to numeric IP address A.B.C.D and port number P.
2768 - A local address is represented as a string with the address in the
2769 local address space.
2770 - An "unsupported family" address is represented by a cons (F . AV)
2771 where F is the family number and AV is a vector containing the socket
2772 address data with one element per address data byte. Do not rely on
2773 this format in portable code, as it may depend on implementation
2774 defined constants, data sizes, and data structure alignment.
2776 :coding CODING -- If CODING is a symbol, it specifies the coding
2777 system used for both reading and writing for this process. If CODING
2778 is a cons (DECODING . ENCODING), DECODING is used for reading, and
2779 ENCODING is used for writing.
2781 :nowait BOOL -- If BOOL is non-nil for a stream type client process,
2782 return without waiting for the connection to complete; instead, the
2783 sentinel function will be called with second arg matching "open" (if
2784 successful) or "failed" when the connect completes. Default is to use
2785 a blocking connect (i.e. wait) for stream type connections.
2787 :noquery BOOL -- Query the user unless BOOL is non-nil, and process is
2788 running when Emacs is exited.
2790 :stop BOOL -- Start process in the `stopped' state if BOOL non-nil.
2791 In the stopped state, a server process does not accept new
2792 connections, and a client process does not handle incoming traffic.
2793 The stopped state is cleared by `continue-process' and set by
2796 :filter FILTER -- Install FILTER as the process filter.
2798 :filter-multibyte BOOL -- If BOOL is non-nil, strings given to the
2799 process filter are multibyte, otherwise they are unibyte.
2800 If this keyword is not specified, the strings are multibyte if
2801 the default value of `enable-multibyte-characters' is non-nil.
2803 :sentinel SENTINEL -- Install SENTINEL as the process sentinel.
2805 :log LOG -- Install LOG as the server process log function. This
2806 function is called when the server accepts a network connection from a
2807 client. The arguments are SERVER, CLIENT, and MESSAGE, where SERVER
2808 is the server process, CLIENT is the new process for the connection,
2809 and MESSAGE is a string.
2811 :plist PLIST -- Install PLIST as the new process' initial plist.
2813 :server QLEN -- if QLEN is non-nil, create a server process for the
2814 specified FAMILY, SERVICE, and connection type (stream or datagram).
2815 If QLEN is an integer, it is used as the max. length of the server's
2816 pending connection queue (also known as the backlog); the default
2817 queue length is 5. Default is to create a client process.
2819 The following network options can be specified for this connection:
2821 :broadcast BOOL -- Allow send and receive of datagram broadcasts.
2822 :dontroute BOOL -- Only send to directly connected hosts.
2823 :keepalive BOOL -- Send keep-alive messages on network stream.
2824 :linger BOOL or TIMEOUT -- Send queued messages before closing.
2825 :oobinline BOOL -- Place out-of-band data in receive data stream.
2826 :priority INT -- Set protocol defined priority for sent packets.
2827 :reuseaddr BOOL -- Allow reusing a recently used local address
2828 (this is allowed by default for a server process).
2829 :bindtodevice NAME -- bind to interface NAME. Using this may require
2830 special privileges on some systems.
2832 Consult the relevant system programmer's manual pages for more
2833 information on using these options.
2836 A server process will listen for and accept connections from clients.
2837 When a client connection is accepted, a new network process is created
2838 for the connection with the following parameters:
2840 - The client's process name is constructed by concatenating the server
2841 process' NAME and a client identification string.
2842 - If the FILTER argument is non-nil, the client process will not get a
2843 separate process buffer; otherwise, the client's process buffer is a newly
2844 created buffer named after the server process' BUFFER name or process
2845 NAME concatenated with the client identification string.
2846 - The connection type and the process filter and sentinel parameters are
2847 inherited from the server process' TYPE, FILTER and SENTINEL.
2848 - The client process' contact info is set according to the client's
2849 addressing information (typically an IP address and a port number).
2850 - The client process' plist is initialized from the server's plist.
2852 Notice that the FILTER and SENTINEL args are never used directly by
2853 the server process. Also, the BUFFER argument is not used directly by
2854 the server process, but via the optional :log function, accepted (and
2855 failed) connections may be logged in the server process' buffer.
2857 The original argument list, modified with the actual connection
2858 information, is available via the `process-contact' function.
2860 usage: (make-network-process &rest ARGS) */)
2861 (ptrdiff_t nargs
, Lisp_Object
*args
)
2864 Lisp_Object contact
;
2865 struct Lisp_Process
*p
;
2866 #ifdef HAVE_GETADDRINFO
2867 struct addrinfo ai
, *res
, *lres
;
2868 struct addrinfo hints
;
2869 const char *portstring
;
2871 #else /* HAVE_GETADDRINFO */
2872 struct _emacs_addrinfo
2878 struct sockaddr
*ai_addr
;
2879 struct _emacs_addrinfo
*ai_next
;
2881 #endif /* HAVE_GETADDRINFO */
2882 struct sockaddr_in address_in
;
2883 #ifdef HAVE_LOCAL_SOCKETS
2884 struct sockaddr_un address_un
;
2889 int s
= -1, outch
, inch
;
2890 struct gcpro gcpro1
;
2891 ptrdiff_t count
= SPECPDL_INDEX ();
2893 Lisp_Object QCaddress
; /* one of QClocal or QCremote */
2895 Lisp_Object name
, buffer
, host
, service
, address
;
2896 Lisp_Object filter
, sentinel
;
2897 int is_non_blocking_client
= 0;
2898 int is_server
= 0, backlog
= 5;
2905 /* Save arguments for process-contact and clone-process. */
2906 contact
= Flist (nargs
, args
);
2910 /* Ensure socket support is loaded if available. */
2911 init_winsock (TRUE
);
2914 /* :type TYPE (nil: stream, datagram */
2915 tem
= Fplist_get (contact
, QCtype
);
2917 socktype
= SOCK_STREAM
;
2918 #ifdef DATAGRAM_SOCKETS
2919 else if (EQ (tem
, Qdatagram
))
2920 socktype
= SOCK_DGRAM
;
2922 #ifdef HAVE_SEQPACKET
2923 else if (EQ (tem
, Qseqpacket
))
2924 socktype
= SOCK_SEQPACKET
;
2927 error ("Unsupported connection type");
2930 tem
= Fplist_get (contact
, QCserver
);
2933 /* Don't support network sockets when non-blocking mode is
2934 not available, since a blocked Emacs is not useful. */
2935 #if !defined (O_NONBLOCK) && !defined (O_NDELAY)
2936 error ("Network servers not supported");
2939 if (TYPE_RANGED_INTEGERP (int, tem
))
2940 backlog
= XINT (tem
);
2944 /* Make QCaddress an alias for :local (server) or :remote (client). */
2945 QCaddress
= is_server
? QClocal
: QCremote
;
2948 if (!is_server
&& socktype
!= SOCK_DGRAM
2949 && (tem
= Fplist_get (contact
, QCnowait
), !NILP (tem
)))
2951 #ifndef NON_BLOCKING_CONNECT
2952 error ("Non-blocking connect not supported");
2954 is_non_blocking_client
= 1;
2958 name
= Fplist_get (contact
, QCname
);
2959 buffer
= Fplist_get (contact
, QCbuffer
);
2960 filter
= Fplist_get (contact
, QCfilter
);
2961 sentinel
= Fplist_get (contact
, QCsentinel
);
2963 CHECK_STRING (name
);
2965 /* Initialize addrinfo structure in case we don't use getaddrinfo. */
2966 ai
.ai_socktype
= socktype
;
2971 /* :local ADDRESS or :remote ADDRESS */
2972 address
= Fplist_get (contact
, QCaddress
);
2973 if (!NILP (address
))
2975 host
= service
= Qnil
;
2977 if (!(ai
.ai_addrlen
= get_lisp_to_sockaddr_size (address
, &family
)))
2978 error ("Malformed :address");
2979 ai
.ai_family
= family
;
2980 ai
.ai_addr
= alloca (ai
.ai_addrlen
);
2981 conv_lisp_to_sockaddr (family
, address
, ai
.ai_addr
, ai
.ai_addrlen
);
2985 /* :family FAMILY -- nil (for Inet), local, or integer. */
2986 tem
= Fplist_get (contact
, QCfamily
);
2989 #if defined (HAVE_GETADDRINFO) && defined (AF_INET6)
2995 #ifdef HAVE_LOCAL_SOCKETS
2996 else if (EQ (tem
, Qlocal
))
3000 else if (EQ (tem
, Qipv6
))
3003 else if (EQ (tem
, Qipv4
))
3005 else if (TYPE_RANGED_INTEGERP (int, tem
))
3006 family
= XINT (tem
);
3008 error ("Unknown address family");
3010 ai
.ai_family
= family
;
3012 /* :service SERVICE -- string, integer (port number), or t (random port). */
3013 service
= Fplist_get (contact
, QCservice
);
3015 /* :host HOST -- hostname, ip address, or 'local for localhost. */
3016 host
= Fplist_get (contact
, QChost
);
3019 if (EQ (host
, Qlocal
))
3020 /* Depending on setup, "localhost" may map to different IPv4 and/or
3021 IPv6 addresses, so it's better to be explicit. (Bug#6781) */
3022 host
= build_string ("127.0.0.1");
3023 CHECK_STRING (host
);
3026 #ifdef HAVE_LOCAL_SOCKETS
3027 if (family
== AF_LOCAL
)
3031 message (":family local ignores the :host \"%s\" property",
3033 contact
= Fplist_put (contact
, QChost
, Qnil
);
3036 CHECK_STRING (service
);
3037 memset (&address_un
, 0, sizeof address_un
);
3038 address_un
.sun_family
= AF_LOCAL
;
3039 strncpy (address_un
.sun_path
, SSDATA (service
), sizeof address_un
.sun_path
);
3040 ai
.ai_addr
= (struct sockaddr
*) &address_un
;
3041 ai
.ai_addrlen
= sizeof address_un
;
3046 /* Slow down polling to every ten seconds.
3047 Some kernels have a bug which causes retrying connect to fail
3048 after a connect. Polling can interfere with gethostbyname too. */
3049 #ifdef POLL_FOR_INPUT
3050 if (socktype
!= SOCK_DGRAM
)
3052 record_unwind_protect (unwind_stop_other_atimers
, Qnil
);
3053 bind_polling_period (10);
3057 #ifdef HAVE_GETADDRINFO
3058 /* If we have a host, use getaddrinfo to resolve both host and service.
3059 Otherwise, use getservbyname to lookup the service. */
3063 /* SERVICE can either be a string or int.
3064 Convert to a C string for later use by getaddrinfo. */
3065 if (EQ (service
, Qt
))
3067 else if (INTEGERP (service
))
3069 sprintf (portbuf
, "%"pI
"d", XINT (service
));
3070 portstring
= portbuf
;
3074 CHECK_STRING (service
);
3075 portstring
= SSDATA (service
);
3080 memset (&hints
, 0, sizeof (hints
));
3082 hints
.ai_family
= family
;
3083 hints
.ai_socktype
= socktype
;
3084 hints
.ai_protocol
= 0;
3086 #ifdef HAVE_RES_INIT
3090 ret
= getaddrinfo (SSDATA (host
), portstring
, &hints
, &res
);
3092 #ifdef HAVE_GAI_STRERROR
3093 error ("%s/%s %s", SSDATA (host
), portstring
, gai_strerror (ret
));
3095 error ("%s/%s getaddrinfo error %d", SSDATA (host
), portstring
, ret
);
3101 #endif /* HAVE_GETADDRINFO */
3103 /* We end up here if getaddrinfo is not defined, or in case no hostname
3104 has been specified (e.g. for a local server process). */
3106 if (EQ (service
, Qt
))
3108 else if (INTEGERP (service
))
3109 port
= htons ((unsigned short) XINT (service
));
3112 struct servent
*svc_info
;
3113 CHECK_STRING (service
);
3114 svc_info
= getservbyname (SSDATA (service
),
3115 (socktype
== SOCK_DGRAM
? "udp" : "tcp"));
3117 error ("Unknown service: %s", SDATA (service
));
3118 port
= svc_info
->s_port
;
3121 memset (&address_in
, 0, sizeof address_in
);
3122 address_in
.sin_family
= family
;
3123 address_in
.sin_addr
.s_addr
= INADDR_ANY
;
3124 address_in
.sin_port
= port
;
3126 #ifndef HAVE_GETADDRINFO
3129 struct hostent
*host_info_ptr
;
3131 /* gethostbyname may fail with TRY_AGAIN, but we don't honor that,
3132 as it may `hang' Emacs for a very long time. */
3136 #ifdef HAVE_RES_INIT
3140 host_info_ptr
= gethostbyname (SDATA (host
));
3145 memcpy (&address_in
.sin_addr
, host_info_ptr
->h_addr
,
3146 host_info_ptr
->h_length
);
3147 family
= host_info_ptr
->h_addrtype
;
3148 address_in
.sin_family
= family
;
3151 /* Attempt to interpret host as numeric inet address */
3153 unsigned long numeric_addr
;
3154 numeric_addr
= inet_addr (SSDATA (host
));
3155 if (numeric_addr
== -1)
3156 error ("Unknown host \"%s\"", SDATA (host
));
3158 memcpy (&address_in
.sin_addr
, &numeric_addr
,
3159 sizeof (address_in
.sin_addr
));
3163 #endif /* not HAVE_GETADDRINFO */
3165 ai
.ai_family
= family
;
3166 ai
.ai_addr
= (struct sockaddr
*) &address_in
;
3167 ai
.ai_addrlen
= sizeof address_in
;
3171 /* Do this in case we never enter the for-loop below. */
3172 count1
= SPECPDL_INDEX ();
3175 for (lres
= res
; lres
; lres
= lres
->ai_next
)
3184 s
= socket (lres
->ai_family
, lres
->ai_socktype
, lres
->ai_protocol
);
3191 #ifdef DATAGRAM_SOCKETS
3192 if (!is_server
&& socktype
== SOCK_DGRAM
)
3194 #endif /* DATAGRAM_SOCKETS */
3196 #ifdef NON_BLOCKING_CONNECT
3197 if (is_non_blocking_client
)
3200 ret
= fcntl (s
, F_SETFL
, O_NONBLOCK
);
3202 ret
= fcntl (s
, F_SETFL
, O_NDELAY
);
3214 /* Make us close S if quit. */
3215 record_unwind_protect (close_file_unwind
, make_number (s
));
3217 /* Parse network options in the arg list.
3218 We simply ignore anything which isn't a known option (including other keywords).
3219 An error is signaled if setting a known option fails. */
3220 for (optn
= optbits
= 0; optn
< nargs
-1; optn
+= 2)
3221 optbits
|= set_socket_option (s
, args
[optn
], args
[optn
+1]);
3225 /* Configure as a server socket. */
3227 /* SO_REUSEADDR = 1 is default for server sockets; must specify
3228 explicit :reuseaddr key to override this. */
3229 #ifdef HAVE_LOCAL_SOCKETS
3230 if (family
!= AF_LOCAL
)
3232 if (!(optbits
& (1 << OPIX_REUSEADDR
)))
3235 if (setsockopt (s
, SOL_SOCKET
, SO_REUSEADDR
, &optval
, sizeof optval
))
3236 report_file_error ("Cannot set reuse option on server socket", Qnil
);
3239 if (bind (s
, lres
->ai_addr
, lres
->ai_addrlen
))
3240 report_file_error ("Cannot bind server socket", Qnil
);
3242 #ifdef HAVE_GETSOCKNAME
3243 if (EQ (service
, Qt
))
3245 struct sockaddr_in sa1
;
3246 socklen_t len1
= sizeof (sa1
);
3247 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3249 ((struct sockaddr_in
*)(lres
->ai_addr
))->sin_port
= sa1
.sin_port
;
3250 service
= make_number (ntohs (sa1
.sin_port
));
3251 contact
= Fplist_put (contact
, QCservice
, service
);
3256 if (socktype
!= SOCK_DGRAM
&& listen (s
, backlog
))
3257 report_file_error ("Cannot listen on server socket", Qnil
);
3265 ret
= connect (s
, lres
->ai_addr
, lres
->ai_addrlen
);
3268 if (ret
== 0 || xerrno
== EISCONN
)
3270 /* The unwind-protect will be discarded afterwards.
3271 Likewise for immediate_quit. */
3275 #ifdef NON_BLOCKING_CONNECT
3277 if (is_non_blocking_client
&& xerrno
== EINPROGRESS
)
3281 if (is_non_blocking_client
&& xerrno
== EWOULDBLOCK
)
3288 if (xerrno
== EINTR
)
3290 /* Unlike most other syscalls connect() cannot be called
3291 again. (That would return EALREADY.) The proper way to
3292 wait for completion is pselect(). */
3300 sc
= pselect (s
+ 1, NULL
, &fdset
, NULL
, NULL
, NULL
);
3306 report_file_error ("select failed", Qnil
);
3310 len
= sizeof xerrno
;
3311 eassert (FD_ISSET (s
, &fdset
));
3312 if (getsockopt (s
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &len
) == -1)
3313 report_file_error ("getsockopt failed", Qnil
);
3315 errno
= xerrno
, report_file_error ("error during connect", Qnil
);
3319 #endif /* !WINDOWSNT */
3323 /* Discard the unwind protect closing S. */
3324 specpdl_ptr
= specpdl
+ count1
;
3329 if (xerrno
== EINTR
)
3336 #ifdef DATAGRAM_SOCKETS
3337 if (socktype
== SOCK_DGRAM
)
3339 if (datagram_address
[s
].sa
)
3341 datagram_address
[s
].sa
= (struct sockaddr
*) xmalloc (lres
->ai_addrlen
);
3342 datagram_address
[s
].len
= lres
->ai_addrlen
;
3346 memset (datagram_address
[s
].sa
, 0, lres
->ai_addrlen
);
3347 if (remote
= Fplist_get (contact
, QCremote
), !NILP (remote
))
3350 rlen
= get_lisp_to_sockaddr_size (remote
, &rfamily
);
3351 if (rfamily
== lres
->ai_family
&& rlen
== lres
->ai_addrlen
)
3352 conv_lisp_to_sockaddr (rfamily
, remote
,
3353 datagram_address
[s
].sa
, rlen
);
3357 memcpy (datagram_address
[s
].sa
, lres
->ai_addr
, lres
->ai_addrlen
);
3360 contact
= Fplist_put (contact
, QCaddress
,
3361 conv_sockaddr_to_lisp (lres
->ai_addr
, lres
->ai_addrlen
));
3362 #ifdef HAVE_GETSOCKNAME
3365 struct sockaddr_in sa1
;
3366 socklen_t len1
= sizeof (sa1
);
3367 if (getsockname (s
, (struct sockaddr
*)&sa1
, &len1
) == 0)
3368 contact
= Fplist_put (contact
, QClocal
,
3369 conv_sockaddr_to_lisp ((struct sockaddr
*)&sa1
, len1
));
3376 #ifdef HAVE_GETADDRINFO
3385 /* Discard the unwind protect for closing S, if any. */
3386 specpdl_ptr
= specpdl
+ count1
;
3388 /* Unwind bind_polling_period and request_sigio. */
3389 unbind_to (count
, Qnil
);
3393 /* If non-blocking got this far - and failed - assume non-blocking is
3394 not supported after all. This is probably a wrong assumption, but
3395 the normal blocking calls to open-network-stream handles this error
3397 if (is_non_blocking_client
)
3402 report_file_error ("make server process failed", contact
);
3404 report_file_error ("make client process failed", contact
);
3411 buffer
= Fget_buffer_create (buffer
);
3412 proc
= make_process (name
);
3414 chan_process
[inch
] = proc
;
3417 fcntl (inch
, F_SETFL
, O_NONBLOCK
);
3420 fcntl (inch
, F_SETFL
, O_NDELAY
);
3424 p
= XPROCESS (proc
);
3426 p
->childp
= contact
;
3427 p
->plist
= Fcopy_sequence (Fplist_get (contact
, QCplist
));
3431 p
->sentinel
= sentinel
;
3433 p
->log
= Fplist_get (contact
, QClog
);
3434 if (tem
= Fplist_get (contact
, QCnoquery
), !NILP (tem
))
3435 p
->kill_without_query
= 1;
3436 if ((tem
= Fplist_get (contact
, QCstop
), !NILP (tem
)))
3441 if (is_server
&& socktype
!= SOCK_DGRAM
)
3442 p
->status
= Qlisten
;
3444 /* Make the process marker point into the process buffer (if any). */
3445 if (BUFFERP (buffer
))
3446 set_marker_both (p
->mark
, buffer
,
3447 BUF_ZV (XBUFFER (buffer
)),
3448 BUF_ZV_BYTE (XBUFFER (buffer
)));
3450 #ifdef NON_BLOCKING_CONNECT
3451 if (is_non_blocking_client
)
3453 /* We may get here if connect did succeed immediately. However,
3454 in that case, we still need to signal this like a non-blocking
3456 p
->status
= Qconnect
;
3457 if (!FD_ISSET (inch
, &connect_wait_mask
))
3459 FD_SET (inch
, &connect_wait_mask
);
3460 FD_SET (inch
, &write_mask
);
3461 num_pending_connects
++;
3466 /* A server may have a client filter setting of Qt, but it must
3467 still listen for incoming connects unless it is stopped. */
3468 if ((!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
3469 || (EQ (p
->status
, Qlisten
) && NILP (p
->command
)))
3471 FD_SET (inch
, &input_wait_mask
);
3472 FD_SET (inch
, &non_keyboard_wait_mask
);
3475 if (inch
> max_process_desc
)
3476 max_process_desc
= inch
;
3478 tem
= Fplist_member (contact
, QCcoding
);
3479 if (!NILP (tem
) && (!CONSP (tem
) || !CONSP (XCDR (tem
))))
3480 tem
= Qnil
; /* No error message (too late!). */
3483 /* Setup coding systems for communicating with the network stream. */
3484 struct gcpro gcpro1
;
3485 /* Qt denotes we have not yet called Ffind_operation_coding_system. */
3486 Lisp_Object coding_systems
= Qt
;
3487 Lisp_Object fargs
[5], val
;
3491 val
= XCAR (XCDR (tem
));
3495 else if (!NILP (Vcoding_system_for_read
))
3496 val
= Vcoding_system_for_read
;
3497 else if ((!NILP (buffer
) && NILP (BVAR (XBUFFER (buffer
), enable_multibyte_characters
)))
3498 || (NILP (buffer
) && NILP (BVAR (&buffer_defaults
, enable_multibyte_characters
))))
3499 /* We dare not decode end-of-line format by setting VAL to
3500 Qraw_text, because the existing Emacs Lisp libraries
3501 assume that they receive bare code including a sequence of
3506 if (NILP (host
) || NILP (service
))
3507 coding_systems
= Qnil
;
3510 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3511 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3513 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3516 if (CONSP (coding_systems
))
3517 val
= XCAR (coding_systems
);
3518 else if (CONSP (Vdefault_process_coding_system
))
3519 val
= XCAR (Vdefault_process_coding_system
);
3523 p
->decode_coding_system
= val
;
3527 val
= XCAR (XCDR (tem
));
3531 else if (!NILP (Vcoding_system_for_write
))
3532 val
= Vcoding_system_for_write
;
3533 else if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
3537 if (EQ (coding_systems
, Qt
))
3539 if (NILP (host
) || NILP (service
))
3540 coding_systems
= Qnil
;
3543 fargs
[0] = Qopen_network_stream
, fargs
[1] = name
,
3544 fargs
[2] = buffer
, fargs
[3] = host
, fargs
[4] = service
;
3546 coding_systems
= Ffind_operation_coding_system (5, fargs
);
3550 if (CONSP (coding_systems
))
3551 val
= XCDR (coding_systems
);
3552 else if (CONSP (Vdefault_process_coding_system
))
3553 val
= XCDR (Vdefault_process_coding_system
);
3557 p
->encode_coding_system
= val
;
3559 setup_process_coding_systems (proc
);
3561 p
->decoding_buf
= empty_unibyte_string
;
3562 p
->decoding_carryover
= 0;
3563 p
->encoding_buf
= empty_unibyte_string
;
3565 p
->inherit_coding_system_flag
3566 = !(!NILP (tem
) || NILP (buffer
) || !inherit_process_coding_system
);
3573 #if defined (HAVE_NET_IF_H)
3576 DEFUN ("network-interface-list", Fnetwork_interface_list
, Snetwork_interface_list
, 0, 0, 0,
3577 doc
: /* Return an alist of all network interfaces and their network address.
3578 Each element is a cons, the car of which is a string containing the
3579 interface name, and the cdr is the network address in internal
3580 format; see the description of ADDRESS in `make-network-process'. */)
3583 struct ifconf ifconf
;
3584 struct ifreq
*ifreq
;
3586 ptrdiff_t buf_size
= 512;
3590 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3596 buf
= xpalloc (buf
, &buf_size
, 1, INT_MAX
, 1);
3597 ifconf
.ifc_buf
= buf
;
3598 ifconf
.ifc_len
= buf_size
;
3599 if (ioctl (s
, SIOCGIFCONF
, &ifconf
))
3606 while (ifconf
.ifc_len
== buf_size
);
3611 ifreq
= ifconf
.ifc_req
;
3612 while ((char *) ifreq
< (char *) ifconf
.ifc_req
+ ifconf
.ifc_len
)
3614 struct ifreq
*ifq
= ifreq
;
3615 #ifdef HAVE_STRUCT_IFREQ_IFR_ADDR_SA_LEN
3616 #define SIZEOF_IFREQ(sif) \
3617 ((sif)->ifr_addr.sa_len < sizeof (struct sockaddr) \
3618 ? sizeof (*(sif)) : sizeof ((sif)->ifr_name) + (sif)->ifr_addr.sa_len)
3620 int len
= SIZEOF_IFREQ (ifq
);
3622 int len
= sizeof (*ifreq
);
3624 char namebuf
[sizeof (ifq
->ifr_name
) + 1];
3626 ifreq
= (struct ifreq
*) ((char *) ifreq
+ len
);
3628 if (ifq
->ifr_addr
.sa_family
!= AF_INET
)
3631 memcpy (namebuf
, ifq
->ifr_name
, sizeof (ifq
->ifr_name
));
3632 namebuf
[sizeof (ifq
->ifr_name
)] = 0;
3633 res
= Fcons (Fcons (build_string (namebuf
),
3634 conv_sockaddr_to_lisp (&ifq
->ifr_addr
,
3635 sizeof (struct sockaddr
))),
3642 #endif /* SIOCGIFCONF */
3644 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
3648 const char *flag_sym
;
3651 static const struct ifflag_def ifflag_table
[] = {
3655 #ifdef IFF_BROADCAST
3656 { IFF_BROADCAST
, "broadcast" },
3659 { IFF_DEBUG
, "debug" },
3662 { IFF_LOOPBACK
, "loopback" },
3664 #ifdef IFF_POINTOPOINT
3665 { IFF_POINTOPOINT
, "pointopoint" },
3668 { IFF_RUNNING
, "running" },
3671 { IFF_NOARP
, "noarp" },
3674 { IFF_PROMISC
, "promisc" },
3676 #ifdef IFF_NOTRAILERS
3677 #ifdef NS_IMPL_COCOA
3678 /* Really means smart, notrailers is obsolete */
3679 { IFF_NOTRAILERS
, "smart" },
3681 { IFF_NOTRAILERS
, "notrailers" },
3685 { IFF_ALLMULTI
, "allmulti" },
3688 { IFF_MASTER
, "master" },
3691 { IFF_SLAVE
, "slave" },
3693 #ifdef IFF_MULTICAST
3694 { IFF_MULTICAST
, "multicast" },
3697 { IFF_PORTSEL
, "portsel" },
3699 #ifdef IFF_AUTOMEDIA
3700 { IFF_AUTOMEDIA
, "automedia" },
3703 { IFF_DYNAMIC
, "dynamic" },
3706 { IFF_OACTIVE
, "oactive" }, /* OpenBSD: transmission in progress */
3709 { IFF_SIMPLEX
, "simplex" }, /* OpenBSD: can't hear own transmissions */
3712 { IFF_LINK0
, "link0" }, /* OpenBSD: per link layer defined bit */
3715 { IFF_LINK1
, "link1" }, /* OpenBSD: per link layer defined bit */
3718 { IFF_LINK2
, "link2" }, /* OpenBSD: per link layer defined bit */
3723 DEFUN ("network-interface-info", Fnetwork_interface_info
, Snetwork_interface_info
, 1, 1, 0,
3724 doc
: /* Return information about network interface named IFNAME.
3725 The return value is a list (ADDR BCAST NETMASK HWADDR FLAGS),
3726 where ADDR is the layer 3 address, BCAST is the layer 3 broadcast address,
3727 NETMASK is the layer 3 network mask, HWADDR is the layer 2 address, and
3728 FLAGS is the current flags of the interface. */)
3729 (Lisp_Object ifname
)
3732 Lisp_Object res
= Qnil
;
3736 #if (! (defined SIOCGIFHWADDR && defined HAVE_STRUCT_IFREQ_IFR_HWADDR) \
3737 && defined HAVE_GETIFADDRS && defined LLADDR)
3738 struct ifaddrs
*ifap
;
3741 CHECK_STRING (ifname
);
3743 memset (rq
.ifr_name
, 0, sizeof rq
.ifr_name
);
3744 strncpy (rq
.ifr_name
, SSDATA (ifname
), sizeof (rq
.ifr_name
));
3746 s
= socket (AF_INET
, SOCK_STREAM
, 0);
3751 #if defined (SIOCGIFFLAGS) && defined (HAVE_STRUCT_IFREQ_IFR_FLAGS)
3752 if (ioctl (s
, SIOCGIFFLAGS
, &rq
) == 0)
3754 int flags
= rq
.ifr_flags
;
3755 const struct ifflag_def
*fp
;
3758 /* If flags is smaller than int (i.e. short) it may have the high bit set
3759 due to IFF_MULTICAST. In that case, sign extending it into
3761 if (flags
< 0 && sizeof (rq
.ifr_flags
) < sizeof (flags
))
3762 flags
= (unsigned short) rq
.ifr_flags
;
3765 for (fp
= ifflag_table
; flags
!= 0 && fp
->flag_sym
; fp
++)
3767 if (flags
& fp
->flag_bit
)
3769 elt
= Fcons (intern (fp
->flag_sym
), elt
);
3770 flags
-= fp
->flag_bit
;
3773 for (fnum
= 0; flags
&& fnum
< 32; flags
>>= 1, fnum
++)
3777 elt
= Fcons (make_number (fnum
), elt
);
3782 res
= Fcons (elt
, res
);
3785 #if defined (SIOCGIFHWADDR) && defined (HAVE_STRUCT_IFREQ_IFR_HWADDR)
3786 if (ioctl (s
, SIOCGIFHWADDR
, &rq
) == 0)
3788 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3789 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3793 for (n
= 0; n
< 6; n
++)
3794 p
->contents
[n
] = make_number (((unsigned char *)&rq
.ifr_hwaddr
.sa_data
[0])[n
]);
3795 elt
= Fcons (make_number (rq
.ifr_hwaddr
.sa_family
), hwaddr
);
3797 #elif defined (HAVE_GETIFADDRS) && defined (LLADDR)
3798 if (getifaddrs (&ifap
) != -1)
3800 Lisp_Object hwaddr
= Fmake_vector (make_number (6), Qnil
);
3801 register struct Lisp_Vector
*p
= XVECTOR (hwaddr
);
3804 for (it
= ifap
; it
!= NULL
; it
= it
->ifa_next
)
3806 struct sockaddr_dl
*sdl
= (struct sockaddr_dl
*) it
->ifa_addr
;
3807 unsigned char linkaddr
[6];
3810 if (it
->ifa_addr
->sa_family
!= AF_LINK
3811 || strcmp (it
->ifa_name
, SSDATA (ifname
)) != 0
3812 || sdl
->sdl_alen
!= 6)
3815 memcpy (linkaddr
, LLADDR (sdl
), sdl
->sdl_alen
);
3816 for (n
= 0; n
< 6; n
++)
3817 p
->contents
[n
] = make_number (linkaddr
[n
]);
3819 elt
= Fcons (make_number (it
->ifa_addr
->sa_family
), hwaddr
);
3823 #ifdef HAVE_FREEIFADDRS
3827 #endif /* HAVE_GETIFADDRS && LLADDR */
3829 res
= Fcons (elt
, res
);
3832 #if defined (SIOCGIFNETMASK) && (defined (HAVE_STRUCT_IFREQ_IFR_NETMASK) || defined (HAVE_STRUCT_IFREQ_IFR_ADDR))
3833 if (ioctl (s
, SIOCGIFNETMASK
, &rq
) == 0)
3836 #ifdef HAVE_STRUCT_IFREQ_IFR_NETMASK
3837 elt
= conv_sockaddr_to_lisp (&rq
.ifr_netmask
, sizeof (rq
.ifr_netmask
));
3839 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3843 res
= Fcons (elt
, res
);
3846 #if defined (SIOCGIFBRDADDR) && defined (HAVE_STRUCT_IFREQ_IFR_BROADADDR)
3847 if (ioctl (s
, SIOCGIFBRDADDR
, &rq
) == 0)
3850 elt
= conv_sockaddr_to_lisp (&rq
.ifr_broadaddr
, sizeof (rq
.ifr_broadaddr
));
3853 res
= Fcons (elt
, res
);
3856 #if defined (SIOCGIFADDR) && defined (HAVE_STRUCT_IFREQ_IFR_ADDR)
3857 if (ioctl (s
, SIOCGIFADDR
, &rq
) == 0)
3860 elt
= conv_sockaddr_to_lisp (&rq
.ifr_addr
, sizeof (rq
.ifr_addr
));
3863 res
= Fcons (elt
, res
);
3867 return any
? res
: Qnil
;
3870 #endif /* defined (HAVE_NET_IF_H) */
3872 /* Turn off input and output for process PROC. */
3875 deactivate_process (Lisp_Object proc
)
3877 register int inchannel
, outchannel
;
3878 register struct Lisp_Process
*p
= XPROCESS (proc
);
3881 /* Delete GnuTLS structures in PROC, if any. */
3882 emacs_gnutls_deinit (proc
);
3883 #endif /* HAVE_GNUTLS */
3885 inchannel
= p
->infd
;
3886 outchannel
= p
->outfd
;
3888 #ifdef ADAPTIVE_READ_BUFFERING
3889 if (p
->read_output_delay
> 0)
3891 if (--process_output_delay_count
< 0)
3892 process_output_delay_count
= 0;
3893 p
->read_output_delay
= 0;
3894 p
->read_output_skip
= 0;
3900 /* Beware SIGCHLD hereabouts. */
3901 flush_pending_output (inchannel
);
3902 emacs_close (inchannel
);
3903 if (outchannel
>= 0 && outchannel
!= inchannel
)
3904 emacs_close (outchannel
);
3908 #ifdef DATAGRAM_SOCKETS
3909 if (DATAGRAM_CHAN_P (inchannel
))
3911 xfree (datagram_address
[inchannel
].sa
);
3912 datagram_address
[inchannel
].sa
= 0;
3913 datagram_address
[inchannel
].len
= 0;
3916 chan_process
[inchannel
] = Qnil
;
3917 FD_CLR (inchannel
, &input_wait_mask
);
3918 FD_CLR (inchannel
, &non_keyboard_wait_mask
);
3919 #ifdef NON_BLOCKING_CONNECT
3920 if (FD_ISSET (inchannel
, &connect_wait_mask
))
3922 FD_CLR (inchannel
, &connect_wait_mask
);
3923 FD_CLR (inchannel
, &write_mask
);
3924 if (--num_pending_connects
< 0)
3928 if (inchannel
== max_process_desc
)
3931 /* We just closed the highest-numbered process input descriptor,
3932 so recompute the highest-numbered one now. */
3933 max_process_desc
= 0;
3934 for (i
= 0; i
< MAXDESC
; i
++)
3935 if (!NILP (chan_process
[i
]))
3936 max_process_desc
= i
;
3942 DEFUN ("accept-process-output", Faccept_process_output
, Saccept_process_output
,
3944 doc
: /* Allow any pending output from subprocesses to be read by Emacs.
3945 It is read into the process' buffers or given to their filter functions.
3946 Non-nil arg PROCESS means do not return until some output has been received
3949 Non-nil second arg SECONDS and third arg MILLISEC are number of seconds
3950 and milliseconds to wait; return after that much time whether or not
3951 there is any subprocess output. If SECONDS is a floating point number,
3952 it specifies a fractional number of seconds to wait.
3953 The MILLISEC argument is obsolete and should be avoided.
3955 If optional fourth arg JUST-THIS-ONE is non-nil, only accept output
3956 from PROCESS, suspending reading output from other processes.
3957 If JUST-THIS-ONE is an integer, don't run any timers either.
3958 Return non-nil if we received any output before the timeout expired. */)
3959 (register Lisp_Object process
, Lisp_Object seconds
, Lisp_Object millisec
, Lisp_Object just_this_one
)
3964 if (! NILP (process
))
3965 CHECK_PROCESS (process
);
3967 just_this_one
= Qnil
;
3969 if (!NILP (millisec
))
3970 { /* Obsolete calling convention using integers rather than floats. */
3971 CHECK_NUMBER (millisec
);
3973 seconds
= make_float (XINT (millisec
) / 1000.0);
3976 CHECK_NUMBER (seconds
);
3977 seconds
= make_float (XINT (millisec
) / 1000.0 + XINT (seconds
));
3984 if (!NILP (seconds
))
3986 if (INTEGERP (seconds
))
3988 if (0 < XINT (seconds
))
3990 secs
= XINT (seconds
);
3994 else if (FLOATP (seconds
))
3996 if (0 < XFLOAT_DATA (seconds
))
3998 EMACS_TIME t
= EMACS_TIME_FROM_DOUBLE (XFLOAT_DATA (seconds
));
4000 secs
= EMACS_SECS (t
);
4001 secs
= min (secs
, INTMAX_MAX
);
4002 nsecs
= EMACS_NSECS (t
);
4006 wrong_type_argument (Qnumberp
, seconds
);
4008 else if (! NILP (process
))
4012 (wait_reading_process_output (secs
, nsecs
, 0, 0,
4014 !NILP (process
) ? XPROCESS (process
) : NULL
,
4015 NILP (just_this_one
) ? 0 :
4016 !INTEGERP (just_this_one
) ? 1 : -1)
4020 /* Accept a connection for server process SERVER on CHANNEL. */
4022 static int connect_counter
= 0;
4025 server_accept_connection (Lisp_Object server
, int channel
)
4027 Lisp_Object proc
, caller
, name
, buffer
;
4028 Lisp_Object contact
, host
, service
;
4029 struct Lisp_Process
*ps
= XPROCESS (server
);
4030 struct Lisp_Process
*p
;
4034 struct sockaddr_in in
;
4036 struct sockaddr_in6 in6
;
4038 #ifdef HAVE_LOCAL_SOCKETS
4039 struct sockaddr_un un
;
4042 socklen_t len
= sizeof saddr
;
4044 s
= accept (channel
, &saddr
.sa
, &len
);
4053 if (code
== EWOULDBLOCK
)
4057 if (!NILP (ps
->log
))
4058 call3 (ps
->log
, server
, Qnil
,
4059 concat3 (build_string ("accept failed with code"),
4060 Fnumber_to_string (make_number (code
)),
4061 build_string ("\n")));
4067 /* Setup a new process to handle the connection. */
4069 /* Generate a unique identification of the caller, and build contact
4070 information for this process. */
4073 switch (saddr
.sa
.sa_family
)
4077 Lisp_Object args
[5];
4078 unsigned char *ip
= (unsigned char *)&saddr
.in
.sin_addr
.s_addr
;
4079 args
[0] = build_string ("%d.%d.%d.%d");
4080 args
[1] = make_number (*ip
++);
4081 args
[2] = make_number (*ip
++);
4082 args
[3] = make_number (*ip
++);
4083 args
[4] = make_number (*ip
++);
4084 host
= Fformat (5, args
);
4085 service
= make_number (ntohs (saddr
.in
.sin_port
));
4087 args
[0] = build_string (" <%s:%d>");
4090 caller
= Fformat (3, args
);
4097 Lisp_Object args
[9];
4098 uint16_t *ip6
= (uint16_t *)&saddr
.in6
.sin6_addr
;
4100 args
[0] = build_string ("%x:%x:%x:%x:%x:%x:%x:%x");
4101 for (i
= 0; i
< 8; i
++)
4102 args
[i
+1] = make_number (ntohs (ip6
[i
]));
4103 host
= Fformat (9, args
);
4104 service
= make_number (ntohs (saddr
.in
.sin_port
));
4106 args
[0] = build_string (" <[%s]:%d>");
4109 caller
= Fformat (3, args
);
4114 #ifdef HAVE_LOCAL_SOCKETS
4118 caller
= Fnumber_to_string (make_number (connect_counter
));
4119 caller
= concat3 (build_string (" <"), caller
, build_string (">"));
4123 /* Create a new buffer name for this process if it doesn't have a
4124 filter. The new buffer name is based on the buffer name or
4125 process name of the server process concatenated with the caller
4128 if (!NILP (ps
->filter
) && !EQ (ps
->filter
, Qt
))
4132 buffer
= ps
->buffer
;
4134 buffer
= Fbuffer_name (buffer
);
4139 buffer
= concat2 (buffer
, caller
);
4140 buffer
= Fget_buffer_create (buffer
);
4144 /* Generate a unique name for the new server process. Combine the
4145 server process name with the caller identification. */
4147 name
= concat2 (ps
->name
, caller
);
4148 proc
= make_process (name
);
4150 chan_process
[s
] = proc
;
4153 fcntl (s
, F_SETFL
, O_NONBLOCK
);
4156 fcntl (s
, F_SETFL
, O_NDELAY
);
4160 p
= XPROCESS (proc
);
4162 /* Build new contact information for this setup. */
4163 contact
= Fcopy_sequence (ps
->childp
);
4164 contact
= Fplist_put (contact
, QCserver
, Qnil
);
4165 contact
= Fplist_put (contact
, QChost
, host
);
4166 if (!NILP (service
))
4167 contact
= Fplist_put (contact
, QCservice
, service
);
4168 contact
= Fplist_put (contact
, QCremote
,
4169 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4170 #ifdef HAVE_GETSOCKNAME
4172 if (getsockname (s
, &saddr
.sa
, &len
) == 0)
4173 contact
= Fplist_put (contact
, QClocal
,
4174 conv_sockaddr_to_lisp (&saddr
.sa
, len
));
4177 p
->childp
= contact
;
4178 p
->plist
= Fcopy_sequence (ps
->plist
);
4182 p
->sentinel
= ps
->sentinel
;
4183 p
->filter
= ps
->filter
;
4190 /* Client processes for accepted connections are not stopped initially. */
4191 if (!EQ (p
->filter
, Qt
))
4193 FD_SET (s
, &input_wait_mask
);
4194 FD_SET (s
, &non_keyboard_wait_mask
);
4197 if (s
> max_process_desc
)
4198 max_process_desc
= s
;
4200 /* Setup coding system for new process based on server process.
4201 This seems to be the proper thing to do, as the coding system
4202 of the new process should reflect the settings at the time the
4203 server socket was opened; not the current settings. */
4205 p
->decode_coding_system
= ps
->decode_coding_system
;
4206 p
->encode_coding_system
= ps
->encode_coding_system
;
4207 setup_process_coding_systems (proc
);
4209 p
->decoding_buf
= empty_unibyte_string
;
4210 p
->decoding_carryover
= 0;
4211 p
->encoding_buf
= empty_unibyte_string
;
4213 p
->inherit_coding_system_flag
4214 = (NILP (buffer
) ? 0 : ps
->inherit_coding_system_flag
);
4216 if (!NILP (ps
->log
))
4217 call3 (ps
->log
, server
, proc
,
4218 concat3 (build_string ("accept from "),
4219 (STRINGP (host
) ? host
: build_string ("-")),
4220 build_string ("\n")));
4222 if (!NILP (p
->sentinel
))
4223 exec_sentinel (proc
,
4224 concat3 (build_string ("open from "),
4225 (STRINGP (host
) ? host
: build_string ("-")),
4226 build_string ("\n")));
4229 /* This variable is different from waiting_for_input in keyboard.c.
4230 It is used to communicate to a lisp process-filter/sentinel (via the
4231 function Fwaiting_for_user_input_p below) whether Emacs was waiting
4232 for user-input when that process-filter was called.
4233 waiting_for_input cannot be used as that is by definition 0 when
4234 lisp code is being evalled.
4235 This is also used in record_asynch_buffer_change.
4236 For that purpose, this must be 0
4237 when not inside wait_reading_process_output. */
4238 static int waiting_for_user_input_p
;
4241 wait_reading_process_output_unwind (Lisp_Object data
)
4243 waiting_for_user_input_p
= XINT (data
);
4247 /* This is here so breakpoints can be put on it. */
4249 wait_reading_process_output_1 (void)
4253 /* Read and dispose of subprocess output while waiting for timeout to
4254 elapse and/or keyboard input to be available.
4258 If negative, gobble data immediately available but don't wait for any.
4261 an additional duration to wait, measured in nanoseconds
4262 If TIME_LIMIT is zero, then:
4263 If NSECS == 0, there is no limit.
4264 If NSECS > 0, the timeout consists of NSEC only.
4265 If NSECS < 0, gobble data immediately, as if TIME_LIMIT were negative.
4267 READ_KBD is a lisp value:
4268 0 to ignore keyboard input, or
4269 1 to return when input is available, or
4270 -1 meaning caller will actually read the input, so don't throw to
4271 the quit handler, or
4273 DO_DISPLAY != 0 means redisplay should be done to show subprocess
4274 output that arrives.
4276 If WAIT_FOR_CELL is a cons cell, wait until its car is non-nil
4277 (and gobble terminal input into the buffer if any arrives).
4279 If WAIT_PROC is specified, wait until something arrives from that
4280 process. The return value is true if we read some input from
4283 If JUST_WAIT_PROC is non-nil, handle only output from WAIT_PROC
4284 (suspending output from other processes). A negative value
4285 means don't run any timers either.
4287 If WAIT_PROC is specified, then the function returns true if we
4288 received input from that process before the timeout elapsed.
4289 Otherwise, return true if we received input from any process. */
4292 wait_reading_process_output (intmax_t time_limit
, int nsecs
, int read_kbd
,
4294 Lisp_Object wait_for_cell
,
4295 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
4297 register int channel
, nfds
;
4298 SELECT_TYPE Available
;
4299 SELECT_TYPE Writeok
;
4301 int check_delay
, no_avail
;
4304 EMACS_TIME timeout
, end_time
;
4305 int wait_channel
= -1;
4306 int got_some_input
= 0;
4307 ptrdiff_t count
= SPECPDL_INDEX ();
4309 FD_ZERO (&Available
);
4312 if (time_limit
== 0 && nsecs
== 0 && wait_proc
&& !NILP (Vinhibit_quit
)
4313 && !(CONSP (wait_proc
->status
) && EQ (XCAR (wait_proc
->status
), Qexit
)))
4314 message ("Blocking call to accept-process-output with quit inhibited!!");
4316 /* If wait_proc is a process to watch, set wait_channel accordingly. */
4317 if (wait_proc
!= NULL
)
4318 wait_channel
= wait_proc
->infd
;
4320 record_unwind_protect (wait_reading_process_output_unwind
,
4321 make_number (waiting_for_user_input_p
));
4322 waiting_for_user_input_p
= read_kbd
;
4329 else if (TYPE_MAXIMUM (time_t) < time_limit
)
4330 time_limit
= TYPE_MAXIMUM (time_t);
4332 /* Since we may need to wait several times,
4333 compute the absolute time to return at. */
4334 if (time_limit
|| nsecs
) /* FIXME neither should be negative, no? */
4336 EMACS_GET_TIME (end_time
);
4337 EMACS_SET_SECS_NSECS (timeout
, time_limit
, nsecs
);
4338 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
4343 int timeout_reduced_for_timers
= 0;
4345 /* If calling from keyboard input, do not quit
4346 since we want to return C-g as an input character.
4347 Otherwise, do pending quit if requested. */
4352 process_pending_signals ();
4355 /* Exit now if the cell we're waiting for became non-nil. */
4356 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4359 /* Compute time from now till when time limit is up */
4360 /* Exit if already run out */
4363 /* -1 specified for timeout means
4364 gobble output available now
4365 but don't wait at all. */
4367 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4369 else if (time_limit
|| nsecs
)
4371 EMACS_GET_TIME (timeout
);
4372 if (EMACS_TIME_LE (end_time
, timeout
))
4374 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
4378 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
4381 /* Normally we run timers here.
4382 But not if wait_for_cell; in those cases,
4383 the wait is supposed to be short,
4384 and those callers cannot handle running arbitrary Lisp code here. */
4385 if (NILP (wait_for_cell
)
4386 && just_wait_proc
>= 0)
4388 EMACS_TIME timer_delay
;
4392 int old_timers_run
= timers_run
;
4393 struct buffer
*old_buffer
= current_buffer
;
4394 Lisp_Object old_window
= selected_window
;
4396 timer_delay
= timer_check ();
4398 /* If a timer has run, this might have changed buffers
4399 an alike. Make read_key_sequence aware of that. */
4400 if (timers_run
!= old_timers_run
4401 && (old_buffer
!= current_buffer
4402 || !EQ (old_window
, selected_window
))
4403 && waiting_for_user_input_p
== -1)
4404 record_asynch_buffer_change ();
4406 if (timers_run
!= old_timers_run
&& do_display
)
4407 /* We must retry, since a timer may have requeued itself
4408 and that could alter the time_delay. */
4409 redisplay_preserve_echo_area (9);
4413 while (!detect_input_pending ());
4415 /* If there is unread keyboard input, also return. */
4417 && requeued_events_pending_p ())
4420 /* If time_limit is negative, we are not going to wait at all. */
4423 if (EMACS_TIME_VALID_P (timer_delay
))
4425 if (EMACS_TIME_LT (timer_delay
, timeout
))
4427 timeout
= timer_delay
;
4428 timeout_reduced_for_timers
= 1;
4433 /* This is so a breakpoint can be put here. */
4434 wait_reading_process_output_1 ();
4439 /* Cause C-g and alarm signals to take immediate action,
4440 and cause input available signals to zero out timeout.
4442 It is important that we do this before checking for process
4443 activity. If we get a SIGCHLD after the explicit checks for
4444 process activity, timeout is the only way we will know. */
4446 set_waiting_for_input (&timeout
);
4448 /* If status of something has changed, and no input is
4449 available, notify the user of the change right away. After
4450 this explicit check, we'll let the SIGCHLD handler zap
4451 timeout to get our attention. */
4452 if (update_tick
!= process_tick
)
4457 if (kbd_on_hold_p ())
4460 Atemp
= input_wait_mask
;
4463 EMACS_SET_SECS_USECS (timeout
, 0, 0);
4464 if ((pselect (max (max_process_desc
, max_input_desc
) + 1,
4466 #ifdef NON_BLOCKING_CONNECT
4467 (num_pending_connects
> 0 ? &Ctemp
: NULL
),
4471 NULL
, &timeout
, NULL
)
4474 /* It's okay for us to do this and then continue with
4475 the loop, since timeout has already been zeroed out. */
4476 clear_waiting_for_input ();
4477 status_notify (NULL
);
4478 if (do_display
) redisplay_preserve_echo_area (13);
4482 /* Don't wait for output from a non-running process. Just
4483 read whatever data has already been received. */
4484 if (wait_proc
&& wait_proc
->raw_status_new
)
4485 update_status (wait_proc
);
4487 && ! EQ (wait_proc
->status
, Qrun
)
4488 && ! EQ (wait_proc
->status
, Qconnect
))
4490 int nread
, total_nread
= 0;
4492 clear_waiting_for_input ();
4493 XSETPROCESS (proc
, wait_proc
);
4495 /* Read data from the process, until we exhaust it. */
4496 while (wait_proc
->infd
>= 0)
4498 nread
= read_process_output (proc
, wait_proc
->infd
);
4505 total_nread
+= nread
;
4509 else if (nread
== -1 && EIO
== errno
)
4513 else if (nread
== -1 && EAGAIN
== errno
)
4517 else if (nread
== -1 && EWOULDBLOCK
== errno
)
4521 if (total_nread
> 0 && do_display
)
4522 redisplay_preserve_echo_area (10);
4527 /* Wait till there is something to do */
4529 if (wait_proc
&& just_wait_proc
)
4531 if (wait_proc
->infd
< 0) /* Terminated */
4533 FD_SET (wait_proc
->infd
, &Available
);
4537 else if (!NILP (wait_for_cell
))
4539 Available
= non_process_wait_mask
;
4546 Available
= non_keyboard_wait_mask
;
4548 Available
= input_wait_mask
;
4549 Writeok
= write_mask
;
4550 #ifdef SELECT_CANT_DO_WRITE_MASK
4555 check_delay
= wait_channel
>= 0 ? 0 : process_output_delay_count
;
4558 /* If frame size has changed or the window is newly mapped,
4559 redisplay now, before we start to wait. There is a race
4560 condition here; if a SIGIO arrives between now and the select
4561 and indicates that a frame is trashed, the select may block
4562 displaying a trashed screen. */
4563 if (frame_garbaged
&& do_display
)
4565 clear_waiting_for_input ();
4566 redisplay_preserve_echo_area (11);
4568 set_waiting_for_input (&timeout
);
4571 /* Skip the `select' call if input is available and we're
4572 waiting for keyboard input or a cell change (which can be
4573 triggered by processing X events). In the latter case, set
4574 nfds to 1 to avoid breaking the loop. */
4576 if ((read_kbd
|| !NILP (wait_for_cell
))
4577 && detect_input_pending ())
4579 nfds
= read_kbd
? 0 : 1;
4586 #ifdef ADAPTIVE_READ_BUFFERING
4587 /* Set the timeout for adaptive read buffering if any
4588 process has non-zero read_output_skip and non-zero
4589 read_output_delay, and we are not reading output for a
4590 specific wait_channel. It is not executed if
4591 Vprocess_adaptive_read_buffering is nil. */
4592 if (process_output_skip
&& check_delay
> 0)
4594 int nsecs
= EMACS_NSECS (timeout
);
4595 if (EMACS_SECS (timeout
) > 0 || nsecs
> READ_OUTPUT_DELAY_MAX
)
4596 nsecs
= READ_OUTPUT_DELAY_MAX
;
4597 for (channel
= 0; check_delay
> 0 && channel
<= max_process_desc
; channel
++)
4599 proc
= chan_process
[channel
];
4602 /* Find minimum non-zero read_output_delay among the
4603 processes with non-zero read_output_skip. */
4604 if (XPROCESS (proc
)->read_output_delay
> 0)
4607 if (!XPROCESS (proc
)->read_output_skip
)
4609 FD_CLR (channel
, &Available
);
4610 XPROCESS (proc
)->read_output_skip
= 0;
4611 if (XPROCESS (proc
)->read_output_delay
< nsecs
)
4612 nsecs
= XPROCESS (proc
)->read_output_delay
;
4615 EMACS_SET_SECS_NSECS (timeout
, 0, nsecs
);
4616 process_output_skip
= 0;
4619 #if defined (USE_GTK) || defined (HAVE_GCONF) || defined (HAVE_GSETTINGS)
4621 #elif defined (HAVE_NS)
4626 (max (max_process_desc
, max_input_desc
) + 1,
4628 (check_write
? &Writeok
: (SELECT_TYPE
*)0),
4629 NULL
, &timeout
, NULL
);
4632 /* GnuTLS buffers data internally. In lowat mode it leaves
4633 some data in the TCP buffers so that select works, but
4634 with custom pull/push functions we need to check if some
4635 data is available in the buffers manually. */
4640 /* We're not waiting on a specific process, so loop
4641 through all the channels and check for data.
4642 This is a workaround needed for some versions of
4643 the gnutls library -- 2.12.14 has been confirmed
4645 http://comments.gmane.org/gmane.emacs.devel/145074 */
4646 for (channel
= 0; channel
< MAXDESC
; ++channel
)
4647 if (! NILP (chan_process
[channel
]))
4649 struct Lisp_Process
*p
=
4650 XPROCESS (chan_process
[channel
]);
4651 if (p
&& p
->gnutls_p
&& p
->infd
4652 && ((emacs_gnutls_record_check_pending
4657 FD_SET (p
->infd
, &Available
);
4663 /* Check this specific channel. */
4664 if (wait_proc
->gnutls_p
/* Check for valid process. */
4665 /* Do we have pending data? */
4666 && ((emacs_gnutls_record_check_pending
4667 (wait_proc
->gnutls_state
))
4671 /* Set to Available. */
4672 FD_SET (wait_proc
->infd
, &Available
);
4681 /* Make C-g and alarm signals set flags again */
4682 clear_waiting_for_input ();
4684 /* If we woke up due to SIGWINCH, actually change size now. */
4685 do_pending_window_change (0);
4687 if ((time_limit
|| nsecs
) && nfds
== 0 && ! timeout_reduced_for_timers
)
4688 /* We wanted the full specified time, so return now. */
4692 if (xerrno
== EINTR
)
4694 else if (xerrno
== EBADF
)
4697 /* AIX doesn't handle PTY closure the same way BSD does. On AIX,
4698 the child's closure of the pts gives the parent a SIGHUP, and
4699 the ptc file descriptor is automatically closed,
4700 yielding EBADF here or at select() call above.
4701 So, SIGHUP is ignored (see def of PTY_TTY_NAME_SPRINTF
4702 in m/ibmrt-aix.h), and here we just ignore the select error.
4703 Cleanup occurs c/o status_notify after SIGCLD. */
4704 no_avail
= 1; /* Cannot depend on values returned */
4710 error ("select error: %s", emacs_strerror (xerrno
));
4715 FD_ZERO (&Available
);
4719 #if 0 /* When polling is used, interrupt_input is 0,
4720 so get_input_pending should read the input.
4721 So this should not be needed. */
4722 /* If we are using polling for input,
4723 and we see input available, make it get read now.
4724 Otherwise it might not actually get read for a second.
4725 And on hpux, since we turn off polling in wait_reading_process_output,
4726 it might never get read at all if we don't spend much time
4727 outside of wait_reading_process_output. */
4728 if (read_kbd
&& interrupt_input
4729 && keyboard_bit_set (&Available
)
4730 && input_polling_used ())
4731 kill (getpid (), SIGALRM
);
4734 /* Check for keyboard input */
4735 /* If there is any, return immediately
4736 to give it higher priority than subprocesses */
4740 int old_timers_run
= timers_run
;
4741 struct buffer
*old_buffer
= current_buffer
;
4742 Lisp_Object old_window
= selected_window
;
4745 if (detect_input_pending_run_timers (do_display
))
4747 swallow_events (do_display
);
4748 if (detect_input_pending_run_timers (do_display
))
4752 /* If a timer has run, this might have changed buffers
4753 an alike. Make read_key_sequence aware of that. */
4754 if (timers_run
!= old_timers_run
4755 && waiting_for_user_input_p
== -1
4756 && (old_buffer
!= current_buffer
4757 || !EQ (old_window
, selected_window
)))
4758 record_asynch_buffer_change ();
4764 /* If there is unread keyboard input, also return. */
4766 && requeued_events_pending_p ())
4769 /* If we are not checking for keyboard input now,
4770 do process events (but don't run any timers).
4771 This is so that X events will be processed.
4772 Otherwise they may have to wait until polling takes place.
4773 That would causes delays in pasting selections, for example.
4775 (We used to do this only if wait_for_cell.) */
4776 if (read_kbd
== 0 && detect_input_pending ())
4778 swallow_events (do_display
);
4779 #if 0 /* Exiting when read_kbd doesn't request that seems wrong, though. */
4780 if (detect_input_pending ())
4785 /* Exit now if the cell we're waiting for became non-nil. */
4786 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
4790 /* If we think we have keyboard input waiting, but didn't get SIGIO,
4791 go read it. This can happen with X on BSD after logging out.
4792 In that case, there really is no input and no SIGIO,
4793 but select says there is input. */
4795 if (read_kbd
&& interrupt_input
4796 && keyboard_bit_set (&Available
) && ! noninteractive
)
4797 kill (getpid (), SIGIO
);
4801 got_some_input
|= nfds
> 0;
4803 /* If checking input just got us a size-change event from X,
4804 obey it now if we should. */
4805 if (read_kbd
|| ! NILP (wait_for_cell
))
4806 do_pending_window_change (0);
4808 /* Check for data from a process. */
4809 if (no_avail
|| nfds
== 0)
4812 for (channel
= 0; channel
<= max_input_desc
; ++channel
)
4814 struct fd_callback_data
*d
= &fd_callback_info
[channel
];
4815 if (FD_ISSET (channel
, &Available
)
4817 && (d
->condition
& FOR_READ
) != 0)
4818 d
->func (channel
, d
->data
, 1);
4819 if (FD_ISSET (channel
, &write_mask
)
4821 && (d
->condition
& FOR_WRITE
) != 0)
4822 d
->func (channel
, d
->data
, 0);
4825 for (channel
= 0; channel
<= max_process_desc
; channel
++)
4827 if (FD_ISSET (channel
, &Available
)
4828 && FD_ISSET (channel
, &non_keyboard_wait_mask
)
4829 && !FD_ISSET (channel
, &non_process_wait_mask
))
4833 /* If waiting for this channel, arrange to return as
4834 soon as no more input to be processed. No more
4836 if (wait_channel
== channel
)
4842 proc
= chan_process
[channel
];
4846 /* If this is a server stream socket, accept connection. */
4847 if (EQ (XPROCESS (proc
)->status
, Qlisten
))
4849 server_accept_connection (proc
, channel
);
4853 /* Read data from the process, starting with our
4854 buffered-ahead character if we have one. */
4856 nread
= read_process_output (proc
, channel
);
4859 /* Since read_process_output can run a filter,
4860 which can call accept-process-output,
4861 don't try to read from any other processes
4862 before doing the select again. */
4863 FD_ZERO (&Available
);
4866 redisplay_preserve_echo_area (12);
4869 else if (nread
== -1 && errno
== EWOULDBLOCK
)
4872 /* ISC 4.1 defines both EWOULDBLOCK and O_NONBLOCK,
4873 and Emacs uses O_NONBLOCK, so what we get is EAGAIN. */
4875 else if (nread
== -1 && errno
== EAGAIN
)
4879 else if (nread
== -1 && errno
== EAGAIN
)
4881 /* Note that we cannot distinguish between no input
4882 available now and a closed pipe.
4883 With luck, a closed pipe will be accompanied by
4884 subprocess termination and SIGCHLD. */
4885 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4887 #endif /* O_NDELAY */
4888 #endif /* O_NONBLOCK */
4890 /* On some OSs with ptys, when the process on one end of
4891 a pty exits, the other end gets an error reading with
4892 errno = EIO instead of getting an EOF (0 bytes read).
4893 Therefore, if we get an error reading and errno =
4894 EIO, just continue, because the child process has
4895 exited and should clean itself up soon (e.g. when we
4898 However, it has been known to happen that the SIGCHLD
4899 got lost. So raise the signal again just in case.
4901 else if (nread
== -1 && errno
== EIO
)
4903 struct Lisp_Process
*p
= XPROCESS (proc
);
4905 /* Clear the descriptor now, so we only raise the
4907 FD_CLR (channel
, &input_wait_mask
);
4908 FD_CLR (channel
, &non_keyboard_wait_mask
);
4912 /* If the EIO occurs on a pty, sigchld_handler's
4913 wait3() will not find the process object to
4914 delete. Do it here. */
4915 p
->tick
= ++process_tick
;
4916 p
->status
= Qfailed
;
4919 kill (getpid (), SIGCHLD
);
4921 #endif /* HAVE_PTYS */
4922 /* If we can detect process termination, don't consider the
4923 process gone just because its pipe is closed. */
4925 else if (nread
== 0 && !NETCONN_P (proc
) && !SERIALCONN_P (proc
))
4930 /* Preserve status of processes already terminated. */
4931 XPROCESS (proc
)->tick
= ++process_tick
;
4932 deactivate_process (proc
);
4933 if (XPROCESS (proc
)->raw_status_new
)
4934 update_status (XPROCESS (proc
));
4935 if (EQ (XPROCESS (proc
)->status
, Qrun
))
4936 XPROCESS (proc
)->status
4937 = Fcons (Qexit
, Fcons (make_number (256), Qnil
));
4940 #ifdef NON_BLOCKING_CONNECT
4941 if (FD_ISSET (channel
, &Writeok
)
4942 && FD_ISSET (channel
, &connect_wait_mask
))
4944 struct Lisp_Process
*p
;
4946 FD_CLR (channel
, &connect_wait_mask
);
4947 FD_CLR (channel
, &write_mask
);
4948 if (--num_pending_connects
< 0)
4951 proc
= chan_process
[channel
];
4955 p
= XPROCESS (proc
);
4958 /* getsockopt(,,SO_ERROR,,) is said to hang on some systems.
4959 So only use it on systems where it is known to work. */
4961 socklen_t xlen
= sizeof (xerrno
);
4962 if (getsockopt (channel
, SOL_SOCKET
, SO_ERROR
, &xerrno
, &xlen
))
4967 struct sockaddr pname
;
4968 int pnamelen
= sizeof (pname
);
4970 /* If connection failed, getpeername will fail. */
4972 if (getpeername (channel
, &pname
, &pnamelen
) < 0)
4974 /* Obtain connect failure code through error slippage. */
4977 if (errno
== ENOTCONN
&& read (channel
, &dummy
, 1) < 0)
4984 p
->tick
= ++process_tick
;
4985 p
->status
= Fcons (Qfailed
, Fcons (make_number (xerrno
), Qnil
));
4986 deactivate_process (proc
);
4991 /* Execute the sentinel here. If we had relied on
4992 status_notify to do it later, it will read input
4993 from the process before calling the sentinel. */
4994 exec_sentinel (proc
, build_string ("open\n"));
4995 if (!EQ (p
->filter
, Qt
) && !EQ (p
->command
, Qt
))
4997 FD_SET (p
->infd
, &input_wait_mask
);
4998 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
5002 #endif /* NON_BLOCKING_CONNECT */
5003 } /* end for each file descriptor */
5004 } /* end while exit conditions not met */
5006 unbind_to (count
, Qnil
);
5008 /* If calling from keyboard input, do not quit
5009 since we want to return C-g as an input character.
5010 Otherwise, do pending quit if requested. */
5013 /* Prevent input_pending from remaining set if we quit. */
5014 clear_input_pending ();
5018 return got_some_input
;
5021 /* Given a list (FUNCTION ARGS...), apply FUNCTION to the ARGS. */
5024 read_process_output_call (Lisp_Object fun_and_args
)
5026 return apply1 (XCAR (fun_and_args
), XCDR (fun_and_args
));
5030 read_process_output_error_handler (Lisp_Object error_val
)
5032 cmd_error_internal (error_val
, "error in process filter: ");
5034 update_echo_area ();
5035 Fsleep_for (make_number (2), Qnil
);
5039 /* Read pending output from the process channel,
5040 starting with our buffered-ahead character if we have one.
5041 Yield number of decoded characters read.
5043 This function reads at most 4096 characters.
5044 If you want to read all available subprocess output,
5045 you must call it repeatedly until it returns zero.
5047 The characters read are decoded according to PROC's coding-system
5051 read_process_output (Lisp_Object proc
, register int channel
)
5053 register ssize_t nbytes
;
5055 register Lisp_Object outstream
;
5056 register struct Lisp_Process
*p
= XPROCESS (proc
);
5057 register ptrdiff_t opoint
;
5058 struct coding_system
*coding
= proc_decode_coding_system
[channel
];
5059 int carryover
= p
->decoding_carryover
;
5061 ptrdiff_t count
= SPECPDL_INDEX ();
5062 Lisp_Object odeactivate
;
5064 chars
= (char *) alloca (carryover
+ readmax
);
5066 /* See the comment above. */
5067 memcpy (chars
, SDATA (p
->decoding_buf
), carryover
);
5069 #ifdef DATAGRAM_SOCKETS
5070 /* We have a working select, so proc_buffered_char is always -1. */
5071 if (DATAGRAM_CHAN_P (channel
))
5073 socklen_t len
= datagram_address
[channel
].len
;
5074 nbytes
= recvfrom (channel
, chars
+ carryover
, readmax
,
5075 0, datagram_address
[channel
].sa
, &len
);
5080 int buffered
= 0 <= proc_buffered_char
[channel
];
5083 chars
[carryover
] = proc_buffered_char
[channel
];
5084 proc_buffered_char
[channel
] = -1;
5088 nbytes
= emacs_gnutls_read (p
, chars
+ carryover
+ buffered
,
5089 readmax
- buffered
);
5092 nbytes
= emacs_read (channel
, chars
+ carryover
+ buffered
,
5093 readmax
- buffered
);
5094 #ifdef ADAPTIVE_READ_BUFFERING
5095 if (nbytes
> 0 && p
->adaptive_read_buffering
)
5097 int delay
= p
->read_output_delay
;
5100 if (delay
< READ_OUTPUT_DELAY_MAX_MAX
)
5103 process_output_delay_count
++;
5104 delay
+= READ_OUTPUT_DELAY_INCREMENT
* 2;
5107 else if (delay
> 0 && nbytes
== readmax
- buffered
)
5109 delay
-= READ_OUTPUT_DELAY_INCREMENT
;
5111 process_output_delay_count
--;
5113 p
->read_output_delay
= delay
;
5116 p
->read_output_skip
= 1;
5117 process_output_skip
= 1;
5122 nbytes
+= buffered
&& nbytes
<= 0;
5125 p
->decoding_carryover
= 0;
5127 /* At this point, NBYTES holds number of bytes just received
5128 (including the one in proc_buffered_char[channel]). */
5131 if (nbytes
< 0 || coding
->mode
& CODING_MODE_LAST_BLOCK
)
5133 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5136 /* Now set NBYTES how many bytes we must decode. */
5137 nbytes
+= carryover
;
5139 odeactivate
= Vdeactivate_mark
;
5140 /* There's no good reason to let process filters change the current
5141 buffer, and many callers of accept-process-output, sit-for, and
5142 friends don't expect current-buffer to be changed from under them. */
5143 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
5145 /* Read and dispose of the process output. */
5146 outstream
= p
->filter
;
5147 if (!NILP (outstream
))
5150 int outer_running_asynch_code
= running_asynch_code
;
5151 int waiting
= waiting_for_user_input_p
;
5153 /* No need to gcpro these, because all we do with them later
5154 is test them for EQness, and none of them should be a string. */
5156 Lisp_Object obuffer
, okeymap
;
5157 XSETBUFFER (obuffer
, current_buffer
);
5158 okeymap
= BVAR (current_buffer
, keymap
);
5161 /* We inhibit quit here instead of just catching it so that
5162 hitting ^G when a filter happens to be running won't screw
5164 specbind (Qinhibit_quit
, Qt
);
5165 specbind (Qlast_nonmenu_event
, Qt
);
5167 /* In case we get recursively called,
5168 and we already saved the match data nonrecursively,
5169 save the same match data in safely recursive fashion. */
5170 if (outer_running_asynch_code
)
5173 /* Don't clobber the CURRENT match data, either! */
5174 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
5175 restore_search_regs ();
5176 record_unwind_save_match_data ();
5177 Fset_match_data (tem
, Qt
);
5180 /* For speed, if a search happens within this code,
5181 save the match data in a special nonrecursive fashion. */
5182 running_asynch_code
= 1;
5184 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5185 text
= coding
->dst_object
;
5186 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5187 /* A new coding system might be found. */
5188 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5190 p
->decode_coding_system
= Vlast_coding_system_used
;
5192 /* Don't call setup_coding_system for
5193 proc_decode_coding_system[channel] here. It is done in
5194 detect_coding called via decode_coding above. */
5196 /* If a coding system for encoding is not yet decided, we set
5197 it as the same as coding-system for decoding.
5199 But, before doing that we must check if
5200 proc_encode_coding_system[p->outfd] surely points to a
5201 valid memory because p->outfd will be changed once EOF is
5202 sent to the process. */
5203 if (NILP (p
->encode_coding_system
)
5204 && proc_encode_coding_system
[p
->outfd
])
5206 p
->encode_coding_system
5207 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5208 setup_coding_system (p
->encode_coding_system
,
5209 proc_encode_coding_system
[p
->outfd
]);
5213 if (coding
->carryover_bytes
> 0)
5215 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5216 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5217 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5218 coding
->carryover_bytes
);
5219 p
->decoding_carryover
= coding
->carryover_bytes
;
5221 if (SBYTES (text
) > 0)
5222 /* FIXME: It's wrong to wrap or not based on debug-on-error, and
5223 sometimes it's simply wrong to wrap (e.g. when called from
5224 accept-process-output). */
5225 internal_condition_case_1 (read_process_output_call
,
5227 Fcons (proc
, Fcons (text
, Qnil
))),
5228 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
5229 read_process_output_error_handler
);
5231 /* If we saved the match data nonrecursively, restore it now. */
5232 restore_search_regs ();
5233 running_asynch_code
= outer_running_asynch_code
;
5235 /* Restore waiting_for_user_input_p as it was
5236 when we were called, in case the filter clobbered it. */
5237 waiting_for_user_input_p
= waiting
;
5239 #if 0 /* Call record_asynch_buffer_change unconditionally,
5240 because we might have changed minor modes or other things
5241 that affect key bindings. */
5242 if (! EQ (Fcurrent_buffer (), obuffer
)
5243 || ! EQ (current_buffer
->keymap
, okeymap
))
5245 /* But do it only if the caller is actually going to read events.
5246 Otherwise there's no need to make him wake up, and it could
5247 cause trouble (for example it would make sit_for return). */
5248 if (waiting_for_user_input_p
== -1)
5249 record_asynch_buffer_change ();
5252 /* If no filter, write into buffer if it isn't dead. */
5253 else if (!NILP (p
->buffer
) && !NILP (BVAR (XBUFFER (p
->buffer
), name
)))
5255 Lisp_Object old_read_only
;
5256 ptrdiff_t old_begv
, old_zv
;
5257 ptrdiff_t old_begv_byte
, old_zv_byte
;
5258 ptrdiff_t before
, before_byte
;
5259 ptrdiff_t opoint_byte
;
5263 Fset_buffer (p
->buffer
);
5265 opoint_byte
= PT_BYTE
;
5266 old_read_only
= BVAR (current_buffer
, read_only
);
5269 old_begv_byte
= BEGV_BYTE
;
5270 old_zv_byte
= ZV_BYTE
;
5272 BVAR (current_buffer
, read_only
) = Qnil
;
5274 /* Insert new output into buffer
5275 at the current end-of-output marker,
5276 thus preserving logical ordering of input and output. */
5277 if (XMARKER (p
->mark
)->buffer
)
5278 SET_PT_BOTH (clip_to_bounds (BEGV
, marker_position (p
->mark
), ZV
),
5279 clip_to_bounds (BEGV_BYTE
, marker_byte_position (p
->mark
),
5282 SET_PT_BOTH (ZV
, ZV_BYTE
);
5284 before_byte
= PT_BYTE
;
5286 /* If the output marker is outside of the visible region, save
5287 the restriction and widen. */
5288 if (! (BEGV
<= PT
&& PT
<= ZV
))
5291 decode_coding_c_string (coding
, (unsigned char *) chars
, nbytes
, Qt
);
5292 text
= coding
->dst_object
;
5293 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5294 /* A new coding system might be found. See the comment in the
5295 similar code in the previous `if' block. */
5296 if (!EQ (p
->decode_coding_system
, Vlast_coding_system_used
))
5298 p
->decode_coding_system
= Vlast_coding_system_used
;
5299 if (NILP (p
->encode_coding_system
)
5300 && proc_encode_coding_system
[p
->outfd
])
5302 p
->encode_coding_system
5303 = coding_inherit_eol_type (Vlast_coding_system_used
, Qnil
);
5304 setup_coding_system (p
->encode_coding_system
,
5305 proc_encode_coding_system
[p
->outfd
]);
5308 if (coding
->carryover_bytes
> 0)
5310 if (SCHARS (p
->decoding_buf
) < coding
->carryover_bytes
)
5311 p
->decoding_buf
= make_uninit_string (coding
->carryover_bytes
);
5312 memcpy (SDATA (p
->decoding_buf
), coding
->carryover
,
5313 coding
->carryover_bytes
);
5314 p
->decoding_carryover
= coding
->carryover_bytes
;
5316 /* Adjust the multibyteness of TEXT to that of the buffer. */
5317 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
))
5318 != ! STRING_MULTIBYTE (text
))
5319 text
= (STRING_MULTIBYTE (text
)
5320 ? Fstring_as_unibyte (text
)
5321 : Fstring_to_multibyte (text
));
5322 /* Insert before markers in case we are inserting where
5323 the buffer's mark is, and the user's next command is Meta-y. */
5324 insert_from_string_before_markers (text
, 0, 0,
5325 SCHARS (text
), SBYTES (text
), 0);
5327 /* Make sure the process marker's position is valid when the
5328 process buffer is changed in the signal_after_change above.
5329 W3 is known to do that. */
5330 if (BUFFERP (p
->buffer
)
5331 && (b
= XBUFFER (p
->buffer
), b
!= current_buffer
))
5332 set_marker_both (p
->mark
, p
->buffer
, BUF_PT (b
), BUF_PT_BYTE (b
));
5334 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
5336 update_mode_lines
++;
5338 /* Make sure opoint and the old restrictions
5339 float ahead of any new text just as point would. */
5340 if (opoint
>= before
)
5342 opoint
+= PT
- before
;
5343 opoint_byte
+= PT_BYTE
- before_byte
;
5345 if (old_begv
> before
)
5347 old_begv
+= PT
- before
;
5348 old_begv_byte
+= PT_BYTE
- before_byte
;
5350 if (old_zv
>= before
)
5352 old_zv
+= PT
- before
;
5353 old_zv_byte
+= PT_BYTE
- before_byte
;
5356 /* If the restriction isn't what it should be, set it. */
5357 if (old_begv
!= BEGV
|| old_zv
!= ZV
)
5358 Fnarrow_to_region (make_number (old_begv
), make_number (old_zv
));
5361 BVAR (current_buffer
, read_only
) = old_read_only
;
5362 SET_PT_BOTH (opoint
, opoint_byte
);
5364 /* Handling the process output should not deactivate the mark. */
5365 Vdeactivate_mark
= odeactivate
;
5367 unbind_to (count
, Qnil
);
5371 /* Sending data to subprocess */
5373 static jmp_buf send_process_frame
;
5374 static Lisp_Object process_sent_to
;
5376 #ifndef FORWARD_SIGNAL_TO_MAIN_THREAD
5377 static void send_process_trap (int) NO_RETURN
;
5381 send_process_trap (int ignore
)
5383 SIGNAL_THREAD_CHECK (SIGPIPE
);
5384 sigunblock (sigmask (SIGPIPE
));
5385 longjmp (send_process_frame
, 1);
5388 /* In send_process, when a write fails temporarily,
5389 wait_reading_process_output is called. It may execute user code,
5390 e.g. timers, that attempts to write new data to the same process.
5391 We must ensure that data is sent in the right order, and not
5392 interspersed half-completed with other writes (Bug#10815). This is
5393 handled by the write_queue element of struct process. It is a list
5394 with each entry having the form
5396 (string . (offset . length))
5398 where STRING is a lisp string, OFFSET is the offset into the
5399 string's byte sequence from which we should begin to send, and
5400 LENGTH is the number of bytes left to send. */
5402 /* Create a new entry in write_queue.
5403 INPUT_OBJ should be a buffer, string Qt, or Qnil.
5404 BUF is a pointer to the string sequence of the input_obj or a C
5405 string in case of Qt or Qnil. */
5408 write_queue_push (struct Lisp_Process
*p
, Lisp_Object input_obj
,
5409 const char *buf
, ptrdiff_t len
, int front
)
5412 Lisp_Object entry
, obj
;
5414 if (STRINGP (input_obj
))
5416 offset
= buf
- SSDATA (input_obj
);
5422 obj
= make_unibyte_string (buf
, len
);
5425 entry
= Fcons (obj
, Fcons (make_number (offset
), make_number (len
)));
5428 p
->write_queue
= Fcons (entry
, p
->write_queue
);
5430 p
->write_queue
= nconc2 (p
->write_queue
, Fcons (entry
, Qnil
));
5433 /* Remove the first element in the write_queue of process P, put its
5434 contents in OBJ, BUF and LEN, and return non-zero. If the
5435 write_queue is empty, return zero. */
5438 write_queue_pop (struct Lisp_Process
*p
, Lisp_Object
*obj
,
5439 const char **buf
, ptrdiff_t *len
)
5441 Lisp_Object entry
, offset_length
;
5444 if (NILP (p
->write_queue
))
5447 entry
= XCAR (p
->write_queue
);
5448 p
->write_queue
= XCDR (p
->write_queue
);
5450 *obj
= XCAR (entry
);
5451 offset_length
= XCDR (entry
);
5453 *len
= XINT (XCDR (offset_length
));
5454 offset
= XINT (XCAR (offset_length
));
5455 *buf
= SSDATA (*obj
) + offset
;
5460 /* Send some data to process PROC.
5461 BUF is the beginning of the data; LEN is the number of characters.
5462 OBJECT is the Lisp object that the data comes from. If OBJECT is
5463 nil or t, it means that the data comes from C string.
5465 If OBJECT is not nil, the data is encoded by PROC's coding-system
5466 for encoding before it is sent.
5468 This function can evaluate Lisp code and can garbage collect. */
5471 send_process (volatile Lisp_Object proc
, const char *volatile buf
,
5472 volatile ptrdiff_t len
, volatile Lisp_Object object
)
5474 /* Use volatile to protect variables from being clobbered by longjmp. */
5475 struct Lisp_Process
*p
= XPROCESS (proc
);
5477 struct coding_system
*coding
;
5478 void (*volatile old_sigpipe
) (int);
5480 if (p
->raw_status_new
)
5482 if (! EQ (p
->status
, Qrun
))
5483 error ("Process %s not running", SDATA (p
->name
));
5485 error ("Output file descriptor of %s is closed", SDATA (p
->name
));
5487 coding
= proc_encode_coding_system
[p
->outfd
];
5488 Vlast_coding_system_used
= CODING_ID_NAME (coding
->id
);
5490 if ((STRINGP (object
) && STRING_MULTIBYTE (object
))
5491 || (BUFFERP (object
)
5492 && !NILP (BVAR (XBUFFER (object
), enable_multibyte_characters
)))
5495 p
->encode_coding_system
5496 = complement_process_encoding_system (p
->encode_coding_system
);
5497 if (!EQ (Vlast_coding_system_used
, p
->encode_coding_system
))
5499 /* The coding system for encoding was changed to raw-text
5500 because we sent a unibyte text previously. Now we are
5501 sending a multibyte text, thus we must encode it by the
5502 original coding system specified for the current process.
5504 Another reason we come here is that the coding system
5505 was just complemented and a new one was returned by
5506 complement_process_encoding_system. */
5507 setup_coding_system (p
->encode_coding_system
, coding
);
5508 Vlast_coding_system_used
= p
->encode_coding_system
;
5510 coding
->src_multibyte
= 1;
5514 coding
->src_multibyte
= 0;
5515 /* For sending a unibyte text, character code conversion should
5516 not take place but EOL conversion should. So, setup raw-text
5517 or one of the subsidiary if we have not yet done it. */
5518 if (CODING_REQUIRE_ENCODING (coding
))
5520 if (CODING_REQUIRE_FLUSHING (coding
))
5522 /* But, before changing the coding, we must flush out data. */
5523 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
5524 send_process (proc
, "", 0, Qt
);
5525 coding
->mode
&= CODING_MODE_LAST_BLOCK
;
5527 setup_coding_system (raw_text_coding_system
5528 (Vlast_coding_system_used
),
5530 coding
->src_multibyte
= 0;
5533 coding
->dst_multibyte
= 0;
5535 if (CODING_REQUIRE_ENCODING (coding
))
5537 coding
->dst_object
= Qt
;
5538 if (BUFFERP (object
))
5540 ptrdiff_t from_byte
, from
, to
;
5541 ptrdiff_t save_pt
, save_pt_byte
;
5542 struct buffer
*cur
= current_buffer
;
5544 set_buffer_internal (XBUFFER (object
));
5545 save_pt
= PT
, save_pt_byte
= PT_BYTE
;
5547 from_byte
= PTR_BYTE_POS ((unsigned char *) buf
);
5548 from
= BYTE_TO_CHAR (from_byte
);
5549 to
= BYTE_TO_CHAR (from_byte
+ len
);
5550 TEMP_SET_PT_BOTH (from
, from_byte
);
5551 encode_coding_object (coding
, object
, from
, from_byte
,
5552 to
, from_byte
+ len
, Qt
);
5553 TEMP_SET_PT_BOTH (save_pt
, save_pt_byte
);
5554 set_buffer_internal (cur
);
5556 else if (STRINGP (object
))
5558 encode_coding_object (coding
, object
, 0, 0, SCHARS (object
),
5559 SBYTES (object
), Qt
);
5563 coding
->dst_object
= make_unibyte_string (buf
, len
);
5564 coding
->produced
= len
;
5567 len
= coding
->produced
;
5568 object
= coding
->dst_object
;
5569 buf
= SSDATA (object
);
5572 if (pty_max_bytes
== 0)
5574 #if defined (HAVE_FPATHCONF) && defined (_PC_MAX_CANON)
5575 pty_max_bytes
= fpathconf (p
->outfd
, _PC_MAX_CANON
);
5576 if (pty_max_bytes
< 0)
5577 pty_max_bytes
= 250;
5579 pty_max_bytes
= 250;
5581 /* Deduct one, to leave space for the eof. */
5585 /* 2000-09-21: Emacs 20.7, sparc-sun-solaris-2.6, GCC 2.95.2,
5586 CFLAGS="-g -O": The value of the parameter `proc' is clobbered
5587 when returning with longjmp despite being declared volatile. */
5588 if (!setjmp (send_process_frame
))
5590 p
= XPROCESS (proc
); /* Repair any setjmp clobbering. */
5591 process_sent_to
= proc
;
5593 /* If there is already data in the write_queue, put the new data
5594 in the back of queue. Otherwise, ignore it. */
5595 if (!NILP (p
->write_queue
))
5596 write_queue_push (p
, object
, buf
, len
, 0);
5598 do /* while !NILP (p->write_queue) */
5600 ptrdiff_t cur_len
= -1;
5601 const char *cur_buf
;
5602 Lisp_Object cur_object
;
5604 /* If write_queue is empty, ignore it. */
5605 if (!write_queue_pop (p
, &cur_object
, &cur_buf
, &cur_len
))
5609 cur_object
= object
;
5614 /* Send this batch, using one or more write calls. */
5615 ptrdiff_t written
= 0;
5616 int outfd
= p
->outfd
;
5617 old_sigpipe
= (void (*) (int)) signal (SIGPIPE
, send_process_trap
);
5618 #ifdef DATAGRAM_SOCKETS
5619 if (DATAGRAM_CHAN_P (outfd
))
5621 rv
= sendto (outfd
, cur_buf
, cur_len
,
5622 0, datagram_address
[outfd
].sa
,
5623 datagram_address
[outfd
].len
);
5626 else if (errno
== EMSGSIZE
)
5628 signal (SIGPIPE
, old_sigpipe
);
5629 report_file_error ("sending datagram",
5630 Fcons (proc
, Qnil
));
5638 written
= emacs_gnutls_write (p
, cur_buf
, cur_len
);
5641 written
= emacs_write (outfd
, cur_buf
, cur_len
);
5642 rv
= (written
? 0 : -1);
5643 #ifdef ADAPTIVE_READ_BUFFERING
5644 if (p
->read_output_delay
> 0
5645 && p
->adaptive_read_buffering
== 1)
5647 p
->read_output_delay
= 0;
5648 process_output_delay_count
--;
5649 p
->read_output_skip
= 0;
5653 signal (SIGPIPE
, old_sigpipe
);
5659 || errno
== EWOULDBLOCK
5665 /* Buffer is full. Wait, accepting input;
5666 that may allow the program
5667 to finish doing output and read more. */
5669 #ifdef BROKEN_PTY_READ_AFTER_EAGAIN
5670 /* A gross hack to work around a bug in FreeBSD.
5671 In the following sequence, read(2) returns
5675 write(2) 954 bytes, get EAGAIN
5676 read(2) 1024 bytes in process_read_output
5677 read(2) 11 bytes in process_read_output
5679 That is, read(2) returns more bytes than have
5680 ever been written successfully. The 1033 bytes
5681 read are the 1022 bytes written successfully
5682 after processing (for example with CRs added if
5683 the terminal is set up that way which it is
5684 here). The same bytes will be seen again in a
5685 later read(2), without the CRs. */
5687 if (errno
== EAGAIN
)
5690 ioctl (p
->outfd
, TIOCFLUSH
, &flags
);
5692 #endif /* BROKEN_PTY_READ_AFTER_EAGAIN */
5694 /* Put what we should have written in wait_queue. */
5695 write_queue_push (p
, cur_object
, cur_buf
, cur_len
, 1);
5696 wait_reading_process_output (0, 20 * 1000 * 1000,
5697 0, 0, Qnil
, NULL
, 0);
5698 /* Reread queue, to see what is left. */
5702 /* This is a real error. */
5703 report_file_error ("writing to process", Fcons (proc
, Qnil
));
5709 while (!NILP (p
->write_queue
));
5713 signal (SIGPIPE
, old_sigpipe
);
5714 proc
= process_sent_to
;
5715 p
= XPROCESS (proc
);
5716 p
->raw_status_new
= 0;
5717 p
->status
= Fcons (Qexit
, Fcons (make_number (256), Qnil
));
5718 p
->tick
= ++process_tick
;
5719 deactivate_process (proc
);
5720 error ("SIGPIPE raised on process %s; closed it", SDATA (p
->name
));
5724 DEFUN ("process-send-region", Fprocess_send_region
, Sprocess_send_region
,
5726 doc
: /* Send current contents of region as input to PROCESS.
5727 PROCESS may be a process, a buffer, the name of a process or buffer, or
5728 nil, indicating the current buffer's process.
5729 Called from program, takes three arguments, PROCESS, START and END.
5730 If the region is more than 500 characters long,
5731 it is sent in several bunches. This may happen even for shorter regions.
5732 Output from processes can arrive in between bunches. */)
5733 (Lisp_Object process
, Lisp_Object start
, Lisp_Object end
)
5736 ptrdiff_t start1
, end1
;
5738 proc
= get_process (process
);
5739 validate_region (&start
, &end
);
5741 if (XINT (start
) < GPT
&& XINT (end
) > GPT
)
5742 move_gap (XINT (start
));
5744 start1
= CHAR_TO_BYTE (XINT (start
));
5745 end1
= CHAR_TO_BYTE (XINT (end
));
5746 send_process (proc
, (char *) BYTE_POS_ADDR (start1
), end1
- start1
,
5747 Fcurrent_buffer ());
5752 DEFUN ("process-send-string", Fprocess_send_string
, Sprocess_send_string
,
5754 doc
: /* Send PROCESS the contents of STRING as input.
5755 PROCESS may be a process, a buffer, the name of a process or buffer, or
5756 nil, indicating the current buffer's process.
5757 If STRING is more than 500 characters long,
5758 it is sent in several bunches. This may happen even for shorter strings.
5759 Output from processes can arrive in between bunches. */)
5760 (Lisp_Object process
, Lisp_Object string
)
5763 CHECK_STRING (string
);
5764 proc
= get_process (process
);
5765 send_process (proc
, SSDATA (string
),
5766 SBYTES (string
), string
);
5770 /* Return the foreground process group for the tty/pty that
5771 the process P uses. */
5773 emacs_get_tty_pgrp (struct Lisp_Process
*p
)
5778 if (ioctl (p
->infd
, TIOCGPGRP
, &gid
) == -1 && ! NILP (p
->tty_name
))
5781 /* Some OS:es (Solaris 8/9) does not allow TIOCGPGRP from the
5782 master side. Try the slave side. */
5783 fd
= emacs_open (SSDATA (p
->tty_name
), O_RDONLY
, 0);
5787 ioctl (fd
, TIOCGPGRP
, &gid
);
5791 #endif /* defined (TIOCGPGRP ) */
5796 DEFUN ("process-running-child-p", Fprocess_running_child_p
,
5797 Sprocess_running_child_p
, 0, 1, 0,
5798 doc
: /* Return t if PROCESS has given the terminal to a child.
5799 If the operating system does not make it possible to find out,
5800 return t unconditionally. */)
5801 (Lisp_Object process
)
5803 /* Initialize in case ioctl doesn't exist or gives an error,
5804 in a way that will cause returning t. */
5807 struct Lisp_Process
*p
;
5809 proc
= get_process (process
);
5810 p
= XPROCESS (proc
);
5812 if (!EQ (p
->type
, Qreal
))
5813 error ("Process %s is not a subprocess",
5816 error ("Process %s is not active",
5819 gid
= emacs_get_tty_pgrp (p
);
5826 /* send a signal number SIGNO to PROCESS.
5827 If CURRENT_GROUP is t, that means send to the process group
5828 that currently owns the terminal being used to communicate with PROCESS.
5829 This is used for various commands in shell mode.
5830 If CURRENT_GROUP is lambda, that means send to the process group
5831 that currently owns the terminal, but only if it is NOT the shell itself.
5833 If NOMSG is zero, insert signal-announcements into process's buffers
5836 If we can, we try to signal PROCESS by sending control characters
5837 down the pty. This allows us to signal inferiors who have changed
5838 their uid, for which killpg would return an EPERM error. */
5841 process_send_signal (Lisp_Object process
, int signo
, Lisp_Object current_group
,
5845 register struct Lisp_Process
*p
;
5849 proc
= get_process (process
);
5850 p
= XPROCESS (proc
);
5852 if (!EQ (p
->type
, Qreal
))
5853 error ("Process %s is not a subprocess",
5856 error ("Process %s is not active",
5860 current_group
= Qnil
;
5862 /* If we are using pgrps, get a pgrp number and make it negative. */
5863 if (NILP (current_group
))
5864 /* Send the signal to the shell's process group. */
5868 #ifdef SIGNALS_VIA_CHARACTERS
5869 /* If possible, send signals to the entire pgrp
5870 by sending an input character to it. */
5873 cc_t
*sig_char
= NULL
;
5875 tcgetattr (p
->infd
, &t
);
5880 sig_char
= &t
.c_cc
[VINTR
];
5884 sig_char
= &t
.c_cc
[VQUIT
];
5888 #if defined (VSWTCH) && !defined (PREFER_VSUSP)
5889 sig_char
= &t
.c_cc
[VSWTCH
];
5891 sig_char
= &t
.c_cc
[VSUSP
];
5896 if (sig_char
&& *sig_char
!= CDISABLE
)
5898 send_process (proc
, (char *) sig_char
, 1, Qnil
);
5901 /* If we can't send the signal with a character,
5902 fall through and send it another way. */
5904 /* The code above may fall through if it can't
5905 handle the signal. */
5906 #endif /* defined (SIGNALS_VIA_CHARACTERS) */
5909 /* Get the current pgrp using the tty itself, if we have that.
5910 Otherwise, use the pty to get the pgrp.
5911 On pfa systems, saka@pfu.fujitsu.co.JP writes:
5912 "TIOCGPGRP symbol defined in sys/ioctl.h at E50.
5913 But, TIOCGPGRP does not work on E50 ;-P works fine on E60"
5914 His patch indicates that if TIOCGPGRP returns an error, then
5915 we should just assume that p->pid is also the process group id. */
5917 gid
= emacs_get_tty_pgrp (p
);
5920 /* If we can't get the information, assume
5921 the shell owns the tty. */
5924 /* It is not clear whether anything really can set GID to -1.
5925 Perhaps on some system one of those ioctls can or could do so.
5926 Or perhaps this is vestigial. */
5929 #else /* ! defined (TIOCGPGRP ) */
5930 /* Can't select pgrps on this system, so we know that
5931 the child itself heads the pgrp. */
5933 #endif /* ! defined (TIOCGPGRP ) */
5935 /* If current_group is lambda, and the shell owns the terminal,
5936 don't send any signal. */
5937 if (EQ (current_group
, Qlambda
) && gid
== p
->pid
)
5945 p
->raw_status_new
= 0;
5947 p
->tick
= ++process_tick
;
5950 status_notify (NULL
);
5951 redisplay_preserve_echo_area (13);
5954 #endif /* ! defined (SIGCONT) */
5958 flush_pending_output (p
->infd
);
5962 /* If we don't have process groups, send the signal to the immediate
5963 subprocess. That isn't really right, but it's better than any
5964 obvious alternative. */
5967 kill (p
->pid
, signo
);
5971 /* gid may be a pid, or minus a pgrp's number */
5973 if (!NILP (current_group
))
5975 if (ioctl (p
->infd
, TIOCSIGSEND
, signo
) == -1)
5976 EMACS_KILLPG (gid
, signo
);
5983 #else /* ! defined (TIOCSIGSEND) */
5984 EMACS_KILLPG (gid
, signo
);
5985 #endif /* ! defined (TIOCSIGSEND) */
5988 DEFUN ("interrupt-process", Finterrupt_process
, Sinterrupt_process
, 0, 2, 0,
5989 doc
: /* Interrupt process PROCESS.
5990 PROCESS may be a process, a buffer, or the name of a process or buffer.
5991 No arg or nil means current buffer's process.
5992 Second arg CURRENT-GROUP non-nil means send signal to
5993 the current process-group of the process's controlling terminal
5994 rather than to the process's own process group.
5995 If the process is a shell, this means interrupt current subjob
5996 rather than the shell.
5998 If CURRENT-GROUP is `lambda', and if the shell owns the terminal,
5999 don't send the signal. */)
6000 (Lisp_Object process
, Lisp_Object current_group
)
6002 process_send_signal (process
, SIGINT
, current_group
, 0);
6006 DEFUN ("kill-process", Fkill_process
, Skill_process
, 0, 2, 0,
6007 doc
: /* Kill process PROCESS. May be process or name of one.
6008 See function `interrupt-process' for more details on usage. */)
6009 (Lisp_Object process
, Lisp_Object current_group
)
6011 process_send_signal (process
, SIGKILL
, current_group
, 0);
6015 DEFUN ("quit-process", Fquit_process
, Squit_process
, 0, 2, 0,
6016 doc
: /* Send QUIT signal to process PROCESS. May be process or name of one.
6017 See function `interrupt-process' for more details on usage. */)
6018 (Lisp_Object process
, Lisp_Object current_group
)
6020 process_send_signal (process
, SIGQUIT
, current_group
, 0);
6024 DEFUN ("stop-process", Fstop_process
, Sstop_process
, 0, 2, 0,
6025 doc
: /* Stop process PROCESS. May be process or name of one.
6026 See function `interrupt-process' for more details on usage.
6027 If PROCESS is a network or serial process, inhibit handling of incoming
6029 (Lisp_Object process
, Lisp_Object current_group
)
6031 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6033 struct Lisp_Process
*p
;
6035 p
= XPROCESS (process
);
6036 if (NILP (p
->command
)
6039 FD_CLR (p
->infd
, &input_wait_mask
);
6040 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6046 error ("No SIGTSTP support");
6048 process_send_signal (process
, SIGTSTP
, current_group
, 0);
6053 DEFUN ("continue-process", Fcontinue_process
, Scontinue_process
, 0, 2, 0,
6054 doc
: /* Continue process PROCESS. May be process or name of one.
6055 See function `interrupt-process' for more details on usage.
6056 If PROCESS is a network or serial process, resume handling of incoming
6058 (Lisp_Object process
, Lisp_Object current_group
)
6060 if (PROCESSP (process
) && (NETCONN_P (process
) || SERIALCONN_P (process
)))
6062 struct Lisp_Process
*p
;
6064 p
= XPROCESS (process
);
6065 if (EQ (p
->command
, Qt
)
6067 && (!EQ (p
->filter
, Qt
) || EQ (p
->status
, Qlisten
)))
6069 FD_SET (p
->infd
, &input_wait_mask
);
6070 FD_SET (p
->infd
, &non_keyboard_wait_mask
);
6072 if (fd_info
[ p
->infd
].flags
& FILE_SERIAL
)
6073 PurgeComm (fd_info
[ p
->infd
].hnd
, PURGE_RXABORT
| PURGE_RXCLEAR
);
6074 #else /* not WINDOWSNT */
6075 tcflush (p
->infd
, TCIFLUSH
);
6076 #endif /* not WINDOWSNT */
6082 process_send_signal (process
, SIGCONT
, current_group
, 0);
6084 error ("No SIGCONT support");
6089 DEFUN ("signal-process", Fsignal_process
, Ssignal_process
,
6090 2, 2, "sProcess (name or number): \nnSignal code: ",
6091 doc
: /* Send PROCESS the signal with code SIGCODE.
6092 PROCESS may also be a number specifying the process id of the
6093 process to signal; in this case, the process need not be a child of
6095 SIGCODE may be an integer, or a symbol whose name is a signal name. */)
6096 (Lisp_Object process
, Lisp_Object sigcode
)
6100 if (STRINGP (process
))
6102 Lisp_Object tem
= Fget_process (process
);
6105 Lisp_Object process_number
=
6106 string_to_number (SSDATA (process
), 10, 1);
6107 if (INTEGERP (process_number
) || FLOATP (process_number
))
6108 tem
= process_number
;
6112 else if (!NUMBERP (process
))
6113 process
= get_process (process
);
6118 if (NUMBERP (process
))
6119 CONS_TO_INTEGER (process
, pid_t
, pid
);
6122 CHECK_PROCESS (process
);
6123 pid
= XPROCESS (process
)->pid
;
6125 error ("Cannot signal process %s", SDATA (XPROCESS (process
)->name
));
6128 #define parse_signal(NAME, VALUE) \
6129 else if (!xstrcasecmp (name, NAME)) \
6130 XSETINT (sigcode, VALUE)
6132 if (INTEGERP (sigcode
))
6133 CHECK_TYPE_RANGED_INTEGER (int, sigcode
);
6138 CHECK_SYMBOL (sigcode
);
6139 name
= SSDATA (SYMBOL_NAME (sigcode
));
6141 if (!strncmp (name
, "SIG", 3) || !strncmp (name
, "sig", 3))
6147 parse_signal ("usr1", SIGUSR1
);
6150 parse_signal ("usr2", SIGUSR2
);
6153 parse_signal ("term", SIGTERM
);
6156 parse_signal ("hup", SIGHUP
);
6159 parse_signal ("int", SIGINT
);
6162 parse_signal ("quit", SIGQUIT
);
6165 parse_signal ("ill", SIGILL
);
6168 parse_signal ("abrt", SIGABRT
);
6171 parse_signal ("emt", SIGEMT
);
6174 parse_signal ("kill", SIGKILL
);
6177 parse_signal ("fpe", SIGFPE
);
6180 parse_signal ("bus", SIGBUS
);
6183 parse_signal ("segv", SIGSEGV
);
6186 parse_signal ("sys", SIGSYS
);
6189 parse_signal ("pipe", SIGPIPE
);
6192 parse_signal ("alrm", SIGALRM
);
6195 parse_signal ("urg", SIGURG
);
6198 parse_signal ("stop", SIGSTOP
);
6201 parse_signal ("tstp", SIGTSTP
);
6204 parse_signal ("cont", SIGCONT
);
6207 parse_signal ("chld", SIGCHLD
);
6210 parse_signal ("ttin", SIGTTIN
);
6213 parse_signal ("ttou", SIGTTOU
);
6216 parse_signal ("io", SIGIO
);
6219 parse_signal ("xcpu", SIGXCPU
);
6222 parse_signal ("xfsz", SIGXFSZ
);
6225 parse_signal ("vtalrm", SIGVTALRM
);
6228 parse_signal ("prof", SIGPROF
);
6231 parse_signal ("winch", SIGWINCH
);
6234 parse_signal ("info", SIGINFO
);
6237 error ("Undefined signal name %s", name
);
6242 return make_number (kill (pid
, XINT (sigcode
)));
6245 DEFUN ("process-send-eof", Fprocess_send_eof
, Sprocess_send_eof
, 0, 1, 0,
6246 doc
: /* Make PROCESS see end-of-file in its input.
6247 EOF comes after any text already sent to it.
6248 PROCESS may be a process, a buffer, the name of a process or buffer, or
6249 nil, indicating the current buffer's process.
6250 If PROCESS is a network connection, or is a process communicating
6251 through a pipe (as opposed to a pty), then you cannot send any more
6252 text to PROCESS after you call this function.
6253 If PROCESS is a serial process, wait until all output written to the
6254 process has been transmitted to the serial port. */)
6255 (Lisp_Object process
)
6258 struct coding_system
*coding
;
6260 if (DATAGRAM_CONN_P (process
))
6263 proc
= get_process (process
);
6264 coding
= proc_encode_coding_system
[XPROCESS (proc
)->outfd
];
6266 /* Make sure the process is really alive. */
6267 if (XPROCESS (proc
)->raw_status_new
)
6268 update_status (XPROCESS (proc
));
6269 if (! EQ (XPROCESS (proc
)->status
, Qrun
))
6270 error ("Process %s not running", SDATA (XPROCESS (proc
)->name
));
6272 if (CODING_REQUIRE_FLUSHING (coding
))
6274 coding
->mode
|= CODING_MODE_LAST_BLOCK
;
6275 send_process (proc
, "", 0, Qnil
);
6278 if (XPROCESS (proc
)->pty_flag
)
6279 send_process (proc
, "\004", 1, Qnil
);
6280 else if (EQ (XPROCESS (proc
)->type
, Qserial
))
6283 if (tcdrain (XPROCESS (proc
)->outfd
) != 0)
6284 error ("tcdrain() failed: %s", emacs_strerror (errno
));
6285 #endif /* not WINDOWSNT */
6286 /* Do nothing on Windows because writes are blocking. */
6290 int old_outfd
, new_outfd
;
6292 #ifdef HAVE_SHUTDOWN
6293 /* If this is a network connection, or socketpair is used
6294 for communication with the subprocess, call shutdown to cause EOF.
6295 (In some old system, shutdown to socketpair doesn't work.
6296 Then we just can't win.) */
6297 if (EQ (XPROCESS (proc
)->type
, Qnetwork
)
6298 || XPROCESS (proc
)->outfd
== XPROCESS (proc
)->infd
)
6299 shutdown (XPROCESS (proc
)->outfd
, 1);
6300 /* In case of socketpair, outfd == infd, so don't close it. */
6301 if (XPROCESS (proc
)->outfd
!= XPROCESS (proc
)->infd
)
6302 emacs_close (XPROCESS (proc
)->outfd
);
6303 #else /* not HAVE_SHUTDOWN */
6304 emacs_close (XPROCESS (proc
)->outfd
);
6305 #endif /* not HAVE_SHUTDOWN */
6306 new_outfd
= emacs_open (NULL_DEVICE
, O_WRONLY
, 0);
6309 old_outfd
= XPROCESS (proc
)->outfd
;
6311 if (!proc_encode_coding_system
[new_outfd
])
6312 proc_encode_coding_system
[new_outfd
]
6313 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
6314 memcpy (proc_encode_coding_system
[new_outfd
],
6315 proc_encode_coding_system
[old_outfd
],
6316 sizeof (struct coding_system
));
6317 memset (proc_encode_coding_system
[old_outfd
], 0,
6318 sizeof (struct coding_system
));
6320 XPROCESS (proc
)->outfd
= new_outfd
;
6325 /* On receipt of a signal that a child status has changed, loop asking
6326 about children with changed statuses until the system says there
6329 All we do is change the status; we do not run sentinels or print
6330 notifications. That is saved for the next time keyboard input is
6331 done, in order to avoid timing errors.
6333 ** WARNING: this can be called during garbage collection.
6334 Therefore, it must not be fooled by the presence of mark bits in
6337 ** USG WARNING: Although it is not obvious from the documentation
6338 in signal(2), on a USG system the SIGCLD handler MUST NOT call
6339 signal() before executing at least one wait(), otherwise the
6340 handler will be called again, resulting in an infinite loop. The
6341 relevant portion of the documentation reads "SIGCLD signals will be
6342 queued and the signal-catching function will be continually
6343 reentered until the queue is empty". Invoking signal() causes the
6344 kernel to reexamine the SIGCLD queue. Fred Fish, UniSoft Systems
6347 ** Malloc WARNING: This should never call malloc either directly or
6348 indirectly; if it does, that is a bug */
6352 sigchld_handler (int signo
)
6354 int old_errno
= errno
;
6356 struct Lisp_Process
*p
;
6358 SIGNAL_THREAD_CHECK (signo
);
6369 #endif /* no WUNTRACED */
6370 /* Keep trying to get a status until we get a definitive result. */
6374 pid
= wait3 (&w
, WNOHANG
| WUNTRACED
, 0);
6376 while (pid
< 0 && errno
== EINTR
);
6380 /* PID == 0 means no processes found, PID == -1 means a real
6381 failure. We have done all our job, so return. */
6388 #endif /* no WNOHANG */
6390 /* Find the process that signaled us, and record its status. */
6392 /* The process can have been deleted by Fdelete_process. */
6393 for (tail
= deleted_pid_list
; CONSP (tail
); tail
= XCDR (tail
))
6395 Lisp_Object xpid
= XCAR (tail
);
6396 if ((INTEGERP (xpid
) && pid
== XINT (xpid
))
6397 || (FLOATP (xpid
) && pid
== XFLOAT_DATA (xpid
)))
6399 XSETCAR (tail
, Qnil
);
6400 goto sigchld_end_of_loop
;
6404 /* Otherwise, if it is asynchronous, it is in Vprocess_alist. */
6406 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6408 proc
= XCDR (XCAR (tail
));
6409 p
= XPROCESS (proc
);
6410 if (EQ (p
->type
, Qreal
) && p
->pid
== pid
)
6415 /* Look for an asynchronous process whose pid hasn't been filled
6418 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6420 proc
= XCDR (XCAR (tail
));
6421 p
= XPROCESS (proc
);
6427 /* Change the status of the process that was found. */
6430 int clear_desc_flag
= 0;
6432 p
->tick
= ++process_tick
;
6434 p
->raw_status_new
= 1;
6436 /* If process has terminated, stop waiting for its output. */
6437 if ((WIFSIGNALED (w
) || WIFEXITED (w
))
6439 clear_desc_flag
= 1;
6441 /* We use clear_desc_flag to avoid a compiler bug in Microsoft C. */
6442 if (clear_desc_flag
)
6444 FD_CLR (p
->infd
, &input_wait_mask
);
6445 FD_CLR (p
->infd
, &non_keyboard_wait_mask
);
6448 /* Tell wait_reading_process_output that it needs to wake up and
6450 if (input_available_clear_time
)
6451 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6454 /* There was no asynchronous process found for that pid: we have
6455 a synchronous process. */
6458 synch_process_alive
= 0;
6460 /* Report the status of the synchronous process. */
6462 synch_process_retcode
= WRETCODE (w
);
6463 else if (WIFSIGNALED (w
))
6464 synch_process_termsig
= WTERMSIG (w
);
6466 /* Tell wait_reading_process_output that it needs to wake up and
6468 if (input_available_clear_time
)
6469 EMACS_SET_SECS_USECS (*input_available_clear_time
, 0, 0);
6472 sigchld_end_of_loop
:
6475 /* On some systems, we must return right away.
6476 If any more processes want to signal us, we will
6478 Otherwise (on systems that have WNOHANG), loop around
6479 to use up all the processes that have something to tell us. */
6480 #if (defined WINDOWSNT \
6481 || (defined USG && !defined GNU_LINUX \
6482 && !(defined HPUX && defined WNOHANG)))
6485 #endif /* USG, but not HPUX with WNOHANG */
6488 #endif /* SIGCHLD */
6492 exec_sentinel_unwind (Lisp_Object data
)
6494 XPROCESS (XCAR (data
))->sentinel
= XCDR (data
);
6499 exec_sentinel_error_handler (Lisp_Object error_val
)
6501 cmd_error_internal (error_val
, "error in process sentinel: ");
6503 update_echo_area ();
6504 Fsleep_for (make_number (2), Qnil
);
6509 exec_sentinel (Lisp_Object proc
, Lisp_Object reason
)
6511 Lisp_Object sentinel
, odeactivate
;
6512 register struct Lisp_Process
*p
= XPROCESS (proc
);
6513 ptrdiff_t count
= SPECPDL_INDEX ();
6514 int outer_running_asynch_code
= running_asynch_code
;
6515 int waiting
= waiting_for_user_input_p
;
6517 if (inhibit_sentinels
)
6520 /* No need to gcpro these, because all we do with them later
6521 is test them for EQness, and none of them should be a string. */
6522 odeactivate
= Vdeactivate_mark
;
6524 Lisp_Object obuffer
, okeymap
;
6525 XSETBUFFER (obuffer
, current_buffer
);
6526 okeymap
= BVAR (current_buffer
, keymap
);
6529 /* There's no good reason to let sentinels change the current
6530 buffer, and many callers of accept-process-output, sit-for, and
6531 friends don't expect current-buffer to be changed from under them. */
6532 record_unwind_protect (set_buffer_if_live
, Fcurrent_buffer ());
6534 sentinel
= p
->sentinel
;
6535 if (NILP (sentinel
))
6538 /* Zilch the sentinel while it's running, to avoid recursive invocations;
6539 assure that it gets restored no matter how the sentinel exits. */
6541 record_unwind_protect (exec_sentinel_unwind
, Fcons (proc
, sentinel
));
6542 /* Inhibit quit so that random quits don't screw up a running filter. */
6543 specbind (Qinhibit_quit
, Qt
);
6544 specbind (Qlast_nonmenu_event
, Qt
); /* Why? --Stef */
6546 /* In case we get recursively called,
6547 and we already saved the match data nonrecursively,
6548 save the same match data in safely recursive fashion. */
6549 if (outer_running_asynch_code
)
6552 tem
= Fmatch_data (Qnil
, Qnil
, Qnil
);
6553 restore_search_regs ();
6554 record_unwind_save_match_data ();
6555 Fset_match_data (tem
, Qt
);
6558 /* For speed, if a search happens within this code,
6559 save the match data in a special nonrecursive fashion. */
6560 running_asynch_code
= 1;
6562 internal_condition_case_1 (read_process_output_call
,
6564 Fcons (proc
, Fcons (reason
, Qnil
))),
6565 !NILP (Vdebug_on_error
) ? Qnil
: Qerror
,
6566 exec_sentinel_error_handler
);
6568 /* If we saved the match data nonrecursively, restore it now. */
6569 restore_search_regs ();
6570 running_asynch_code
= outer_running_asynch_code
;
6572 Vdeactivate_mark
= odeactivate
;
6574 /* Restore waiting_for_user_input_p as it was
6575 when we were called, in case the filter clobbered it. */
6576 waiting_for_user_input_p
= waiting
;
6579 if (! EQ (Fcurrent_buffer (), obuffer
)
6580 || ! EQ (current_buffer
->keymap
, okeymap
))
6582 /* But do it only if the caller is actually going to read events.
6583 Otherwise there's no need to make him wake up, and it could
6584 cause trouble (for example it would make sit_for return). */
6585 if (waiting_for_user_input_p
== -1)
6586 record_asynch_buffer_change ();
6588 unbind_to (count
, Qnil
);
6591 /* Report all recent events of a change in process status
6592 (either run the sentinel or output a message).
6593 This is usually done while Emacs is waiting for keyboard input
6594 but can be done at other times. */
6597 status_notify (struct Lisp_Process
*deleting_process
)
6599 register Lisp_Object proc
, buffer
;
6600 Lisp_Object tail
, msg
;
6601 struct gcpro gcpro1
, gcpro2
;
6605 /* We need to gcpro tail; if read_process_output calls a filter
6606 which deletes a process and removes the cons to which tail points
6607 from Vprocess_alist, and then causes a GC, tail is an unprotected
6611 /* Set this now, so that if new processes are created by sentinels
6612 that we run, we get called again to handle their status changes. */
6613 update_tick
= process_tick
;
6615 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
6618 register struct Lisp_Process
*p
;
6620 proc
= Fcdr (XCAR (tail
));
6621 p
= XPROCESS (proc
);
6623 if (p
->tick
!= p
->update_tick
)
6625 p
->update_tick
= p
->tick
;
6627 /* If process is still active, read any output that remains. */
6628 while (! EQ (p
->filter
, Qt
)
6629 && ! EQ (p
->status
, Qconnect
)
6630 && ! EQ (p
->status
, Qlisten
)
6631 /* Network or serial process not stopped: */
6632 && ! EQ (p
->command
, Qt
)
6634 && p
!= deleting_process
6635 && read_process_output (proc
, p
->infd
) > 0);
6639 /* Get the text to use for the message. */
6640 if (p
->raw_status_new
)
6642 msg
= status_message (p
);
6644 /* If process is terminated, deactivate it or delete it. */
6646 if (CONSP (p
->status
))
6647 symbol
= XCAR (p
->status
);
6649 if (EQ (symbol
, Qsignal
) || EQ (symbol
, Qexit
)
6650 || EQ (symbol
, Qclosed
))
6652 if (delete_exited_processes
)
6653 remove_process (proc
);
6655 deactivate_process (proc
);
6658 /* The actions above may have further incremented p->tick.
6659 So set p->update_tick again
6660 so that an error in the sentinel will not cause
6661 this code to be run again. */
6662 p
->update_tick
= p
->tick
;
6663 /* Now output the message suitably. */
6664 if (!NILP (p
->sentinel
))
6665 exec_sentinel (proc
, msg
);
6666 /* Don't bother with a message in the buffer
6667 when a process becomes runnable. */
6668 else if (!EQ (symbol
, Qrun
) && !NILP (buffer
))
6671 struct buffer
*old
= current_buffer
;
6672 ptrdiff_t opoint
, opoint_byte
;
6673 ptrdiff_t before
, before_byte
;
6675 /* Avoid error if buffer is deleted
6676 (probably that's why the process is dead, too) */
6677 if (NILP (BVAR (XBUFFER (buffer
), name
)))
6679 Fset_buffer (buffer
);
6682 opoint_byte
= PT_BYTE
;
6683 /* Insert new output into buffer
6684 at the current end-of-output marker,
6685 thus preserving logical ordering of input and output. */
6686 if (XMARKER (p
->mark
)->buffer
)
6687 Fgoto_char (p
->mark
);
6689 SET_PT_BOTH (ZV
, ZV_BYTE
);
6692 before_byte
= PT_BYTE
;
6694 tem
= BVAR (current_buffer
, read_only
);
6695 BVAR (current_buffer
, read_only
) = Qnil
;
6696 insert_string ("\nProcess ");
6697 Finsert (1, &p
->name
);
6698 insert_string (" ");
6700 BVAR (current_buffer
, read_only
) = tem
;
6701 set_marker_both (p
->mark
, p
->buffer
, PT
, PT_BYTE
);
6703 if (opoint
>= before
)
6704 SET_PT_BOTH (opoint
+ (PT
- before
),
6705 opoint_byte
+ (PT_BYTE
- before_byte
));
6707 SET_PT_BOTH (opoint
, opoint_byte
);
6709 set_buffer_internal (old
);
6714 update_mode_lines
++; /* in case buffers use %s in mode-line-format */
6719 DEFUN ("set-process-coding-system", Fset_process_coding_system
,
6720 Sset_process_coding_system
, 1, 3, 0,
6721 doc
: /* Set coding systems of PROCESS to DECODING and ENCODING.
6722 DECODING will be used to decode subprocess output and ENCODING to
6723 encode subprocess input. */)
6724 (register Lisp_Object process
, Lisp_Object decoding
, Lisp_Object encoding
)
6726 register struct Lisp_Process
*p
;
6728 CHECK_PROCESS (process
);
6729 p
= XPROCESS (process
);
6731 error ("Input file descriptor of %s closed", SDATA (p
->name
));
6733 error ("Output file descriptor of %s closed", SDATA (p
->name
));
6734 Fcheck_coding_system (decoding
);
6735 Fcheck_coding_system (encoding
);
6736 encoding
= coding_inherit_eol_type (encoding
, Qnil
);
6737 p
->decode_coding_system
= decoding
;
6738 p
->encode_coding_system
= encoding
;
6739 setup_process_coding_systems (process
);
6744 DEFUN ("process-coding-system",
6745 Fprocess_coding_system
, Sprocess_coding_system
, 1, 1, 0,
6746 doc
: /* Return a cons of coding systems for decoding and encoding of PROCESS. */)
6747 (register Lisp_Object process
)
6749 CHECK_PROCESS (process
);
6750 return Fcons (XPROCESS (process
)->decode_coding_system
,
6751 XPROCESS (process
)->encode_coding_system
);
6754 DEFUN ("set-process-filter-multibyte", Fset_process_filter_multibyte
,
6755 Sset_process_filter_multibyte
, 2, 2, 0,
6756 doc
: /* Set multibyteness of the strings given to PROCESS's filter.
6757 If FLAG is non-nil, the filter is given multibyte strings.
6758 If FLAG is nil, the filter is given unibyte strings. In this case,
6759 all character code conversion except for end-of-line conversion is
6761 (Lisp_Object process
, Lisp_Object flag
)
6763 register struct Lisp_Process
*p
;
6765 CHECK_PROCESS (process
);
6766 p
= XPROCESS (process
);
6768 p
->decode_coding_system
= raw_text_coding_system (p
->decode_coding_system
);
6769 setup_process_coding_systems (process
);
6774 DEFUN ("process-filter-multibyte-p", Fprocess_filter_multibyte_p
,
6775 Sprocess_filter_multibyte_p
, 1, 1, 0,
6776 doc
: /* Return t if a multibyte string is given to PROCESS's filter.*/)
6777 (Lisp_Object process
)
6779 register struct Lisp_Process
*p
;
6780 struct coding_system
*coding
;
6782 CHECK_PROCESS (process
);
6783 p
= XPROCESS (process
);
6784 coding
= proc_decode_coding_system
[p
->infd
];
6785 return (CODING_FOR_UNIBYTE (coding
) ? Qnil
: Qt
);
6794 add_gpm_wait_descriptor (int desc
)
6796 add_keyboard_wait_descriptor (desc
);
6800 delete_gpm_wait_descriptor (int desc
)
6802 delete_keyboard_wait_descriptor (desc
);
6809 /* Return nonzero if *MASK has a bit set
6810 that corresponds to one of the keyboard input descriptors. */
6813 keyboard_bit_set (fd_set
*mask
)
6817 for (fd
= 0; fd
<= max_input_desc
; fd
++)
6818 if (FD_ISSET (fd
, mask
) && FD_ISSET (fd
, &input_wait_mask
)
6819 && !FD_ISSET (fd
, &non_keyboard_wait_mask
))
6826 #else /* not subprocesses */
6828 /* Defined on msdos.c. */
6829 extern int sys_select (int, SELECT_TYPE
*, SELECT_TYPE
*, SELECT_TYPE
*,
6832 /* Implementation of wait_reading_process_output, assuming that there
6833 are no subprocesses. Used only by the MS-DOS build.
6835 Wait for timeout to elapse and/or keyboard input to be available.
6839 If negative, gobble data immediately available but don't wait for any.
6842 an additional duration to wait, measured in nanoseconds
6843 If TIME_LIMIT is zero, then:
6844 If NSEC == 0, there is no limit.
6845 If NSEC > 0, the timeout consists of NSEC only.
6846 If NSECS < 0, gobble data immediately, as if TIME_LIMIT were negative.
6848 read_kbd is a Lisp_Object:
6849 0 to ignore keyboard input, or
6850 1 to return when input is available, or
6851 -1 means caller will actually read the input, so don't throw to
6854 see full version for other parameters. We know that wait_proc will
6855 always be NULL, since `subprocesses' isn't defined.
6857 do_display != 0 means redisplay should be done to show subprocess
6858 output that arrives.
6860 Return true if we received input from any process. */
6863 wait_reading_process_output (intmax_t time_limit
, int nsecs
, int read_kbd
,
6865 Lisp_Object wait_for_cell
,
6866 struct Lisp_Process
*wait_proc
, int just_wait_proc
)
6869 EMACS_TIME end_time
, timeout
;
6870 SELECT_TYPE waitchannels
;
6878 else if (TYPE_MAXIMUM (time_t) < time_limit
)
6879 time_limit
= TYPE_MAXIMUM (time_t);
6881 /* What does time_limit really mean? */
6882 if (time_limit
|| nsecs
) /* FIXME: what if negative? */
6884 EMACS_GET_TIME (end_time
);
6885 EMACS_SET_SECS_NSECS (timeout
, time_limit
, nsecs
);
6886 EMACS_ADD_TIME (end_time
, end_time
, timeout
);
6889 /* Turn off periodic alarms (in case they are in use)
6890 and then turn off any other atimers,
6891 because the select emulator uses alarms. */
6893 turn_on_atimers (0);
6897 int timeout_reduced_for_timers
= 0;
6899 /* If calling from keyboard input, do not quit
6900 since we want to return C-g as an input character.
6901 Otherwise, do pending quit if requested. */
6905 /* Exit now if the cell we're waiting for became non-nil. */
6906 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
6909 /* Compute time from now till when time limit is up */
6910 /* Exit if already run out */
6913 /* -1 specified for timeout means
6914 gobble output available now
6915 but don't wait at all. */
6917 EMACS_SET_SECS_USECS (timeout
, 0, 0);
6919 else if (time_limit
|| nsecs
)
6921 EMACS_GET_TIME (timeout
);
6922 if (EMACS_TIME_LE (end_time
, timeout
))
6924 EMACS_SUB_TIME (timeout
, end_time
, timeout
);
6928 EMACS_SET_SECS_USECS (timeout
, 100000, 0);
6931 /* If our caller will not immediately handle keyboard events,
6932 run timer events directly.
6933 (Callers that will immediately read keyboard events
6934 call timer_delay on their own.) */
6935 if (NILP (wait_for_cell
))
6937 EMACS_TIME timer_delay
;
6941 int old_timers_run
= timers_run
;
6942 timer_delay
= timer_check ();
6943 if (timers_run
!= old_timers_run
&& do_display
)
6944 /* We must retry, since a timer may have requeued itself
6945 and that could alter the time delay. */
6946 redisplay_preserve_echo_area (14);
6950 while (!detect_input_pending ());
6952 /* If there is unread keyboard input, also return. */
6954 && requeued_events_pending_p ())
6957 if (EMACS_TIME_VALID_P (timer_delay
) && 0 <= nsecs
)
6959 if (EMACS_TIME_LT (timer_delay
, timeout
))
6961 timeout
= timer_delay
;
6962 timeout_reduced_for_timers
= 1;
6967 /* Cause C-g and alarm signals to take immediate action,
6968 and cause input available signals to zero out timeout. */
6970 set_waiting_for_input (&timeout
);
6972 /* Wait till there is something to do. */
6974 if (! read_kbd
&& NILP (wait_for_cell
))
6975 FD_ZERO (&waitchannels
);
6977 FD_SET (0, &waitchannels
);
6979 /* If a frame has been newly mapped and needs updating,
6980 reprocess its display stuff. */
6981 if (frame_garbaged
&& do_display
)
6983 clear_waiting_for_input ();
6984 redisplay_preserve_echo_area (15);
6986 set_waiting_for_input (&timeout
);
6989 if (read_kbd
&& detect_input_pending ())
6992 FD_ZERO (&waitchannels
);
6995 nfds
= pselect (1, &waitchannels
, NULL
, NULL
, &timeout
, NULL
);
6999 /* Make C-g and alarm signals set flags again */
7000 clear_waiting_for_input ();
7002 /* If we woke up due to SIGWINCH, actually change size now. */
7003 do_pending_window_change (0);
7005 if ((time_limit
|| nsecs
) && nfds
== 0 && ! timeout_reduced_for_timers
)
7006 /* We waited the full specified time, so return now. */
7011 /* If the system call was interrupted, then go around the
7013 if (xerrno
== EINTR
)
7014 FD_ZERO (&waitchannels
);
7016 error ("select error: %s", emacs_strerror (xerrno
));
7019 /* Check for keyboard input */
7022 && detect_input_pending_run_timers (do_display
))
7024 swallow_events (do_display
);
7025 if (detect_input_pending_run_timers (do_display
))
7029 /* If there is unread keyboard input, also return. */
7031 && requeued_events_pending_p ())
7034 /* If wait_for_cell. check for keyboard input
7035 but don't run any timers.
7036 ??? (It seems wrong to me to check for keyboard
7037 input at all when wait_for_cell, but the code
7038 has been this way since July 1994.
7039 Try changing this after version 19.31.) */
7040 if (! NILP (wait_for_cell
)
7041 && detect_input_pending ())
7043 swallow_events (do_display
);
7044 if (detect_input_pending ())
7048 /* Exit now if the cell we're waiting for became non-nil. */
7049 if (! NILP (wait_for_cell
) && ! NILP (XCAR (wait_for_cell
)))
7058 #endif /* not subprocesses */
7060 /* The following functions are needed even if async subprocesses are
7061 not supported. Some of them are no-op stubs in that case. */
7063 /* Add DESC to the set of keyboard input descriptors. */
7066 add_keyboard_wait_descriptor (int desc
)
7068 #ifdef subprocesses /* actually means "not MSDOS" */
7069 FD_SET (desc
, &input_wait_mask
);
7070 FD_SET (desc
, &non_process_wait_mask
);
7071 if (desc
> max_input_desc
)
7072 max_input_desc
= desc
;
7076 /* From now on, do not expect DESC to give keyboard input. */
7079 delete_keyboard_wait_descriptor (int desc
)
7083 int lim
= max_input_desc
;
7085 FD_CLR (desc
, &input_wait_mask
);
7086 FD_CLR (desc
, &non_process_wait_mask
);
7088 if (desc
== max_input_desc
)
7089 for (fd
= 0; fd
< lim
; fd
++)
7090 if (FD_ISSET (fd
, &input_wait_mask
) || FD_ISSET (fd
, &write_mask
))
7091 max_input_desc
= fd
;
7095 /* Setup coding systems of PROCESS. */
7098 setup_process_coding_systems (Lisp_Object process
)
7101 struct Lisp_Process
*p
= XPROCESS (process
);
7103 int outch
= p
->outfd
;
7104 Lisp_Object coding_system
;
7106 if (inch
< 0 || outch
< 0)
7109 if (!proc_decode_coding_system
[inch
])
7110 proc_decode_coding_system
[inch
]
7111 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
7112 coding_system
= p
->decode_coding_system
;
7113 if (! NILP (p
->filter
))
7115 else if (BUFFERP (p
->buffer
))
7117 if (NILP (BVAR (XBUFFER (p
->buffer
), enable_multibyte_characters
)))
7118 coding_system
= raw_text_coding_system (coding_system
);
7120 setup_coding_system (coding_system
, proc_decode_coding_system
[inch
]);
7122 if (!proc_encode_coding_system
[outch
])
7123 proc_encode_coding_system
[outch
]
7124 = (struct coding_system
*) xmalloc (sizeof (struct coding_system
));
7125 setup_coding_system (p
->encode_coding_system
,
7126 proc_encode_coding_system
[outch
]);
7130 /* Close all descriptors currently in use for communication
7131 with subprocess. This is used in a newly-forked subprocess
7132 to get rid of irrelevant descriptors. */
7135 close_process_descs (void)
7139 for (i
= 0; i
< MAXDESC
; i
++)
7141 Lisp_Object process
;
7142 process
= chan_process
[i
];
7143 if (!NILP (process
))
7145 int in
= XPROCESS (process
)->infd
;
7146 int out
= XPROCESS (process
)->outfd
;
7149 if (out
>= 0 && in
!= out
)
7156 DEFUN ("get-buffer-process", Fget_buffer_process
, Sget_buffer_process
, 1, 1, 0,
7157 doc
: /* Return the (or a) process associated with BUFFER.
7158 BUFFER may be a buffer or the name of one. */)
7159 (register Lisp_Object buffer
)
7162 register Lisp_Object buf
, tail
, proc
;
7164 if (NILP (buffer
)) return Qnil
;
7165 buf
= Fget_buffer (buffer
);
7166 if (NILP (buf
)) return Qnil
;
7168 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7170 proc
= Fcdr (XCAR (tail
));
7171 if (PROCESSP (proc
) && EQ (XPROCESS (proc
)->buffer
, buf
))
7174 #endif /* subprocesses */
7178 DEFUN ("process-inherit-coding-system-flag",
7179 Fprocess_inherit_coding_system_flag
, Sprocess_inherit_coding_system_flag
,
7181 doc
: /* Return the value of inherit-coding-system flag for PROCESS.
7182 If this flag is t, `buffer-file-coding-system' of the buffer
7183 associated with PROCESS will inherit the coding system used to decode
7184 the process output. */)
7185 (register Lisp_Object process
)
7188 CHECK_PROCESS (process
);
7189 return XPROCESS (process
)->inherit_coding_system_flag
? Qt
: Qnil
;
7191 /* Ignore the argument and return the value of
7192 inherit-process-coding-system. */
7193 return inherit_process_coding_system
? Qt
: Qnil
;
7197 /* Kill all processes associated with `buffer'.
7198 If `buffer' is nil, kill all processes */
7201 kill_buffer_processes (Lisp_Object buffer
)
7204 Lisp_Object tail
, proc
;
7206 for (tail
= Vprocess_alist
; CONSP (tail
); tail
= XCDR (tail
))
7208 proc
= XCDR (XCAR (tail
));
7210 && (NILP (buffer
) || EQ (XPROCESS (proc
)->buffer
, buffer
)))
7212 if (NETCONN_P (proc
) || SERIALCONN_P (proc
))
7213 Fdelete_process (proc
);
7214 else if (XPROCESS (proc
)->infd
>= 0)
7215 process_send_signal (proc
, SIGHUP
, Qnil
, 1);
7218 #else /* subprocesses */
7219 /* Since we have no subprocesses, this does nothing. */
7220 #endif /* subprocesses */
7223 DEFUN ("waiting-for-user-input-p", Fwaiting_for_user_input_p
,
7224 Swaiting_for_user_input_p
, 0, 0, 0,
7225 doc
: /* Returns non-nil if Emacs is waiting for input from the user.
7226 This is intended for use by asynchronous process output filters and sentinels. */)
7230 return (waiting_for_user_input_p
? Qt
: Qnil
);
7236 /* Stop reading input from keyboard sources. */
7239 hold_keyboard_input (void)
7244 /* Resume reading input from keyboard sources. */
7247 unhold_keyboard_input (void)
7252 /* Return non-zero if keyboard input is on hold, zero otherwise. */
7255 kbd_on_hold_p (void)
7257 return kbd_is_on_hold
;
7261 /* Enumeration of and access to system processes a-la ps(1). */
7263 DEFUN ("list-system-processes", Flist_system_processes
, Slist_system_processes
,
7265 doc
: /* Return a list of numerical process IDs of all running processes.
7266 If this functionality is unsupported, return nil.
7268 See `process-attributes' for getting attributes of a process given its ID. */)
7271 return list_system_processes ();
7274 DEFUN ("process-attributes", Fprocess_attributes
,
7275 Sprocess_attributes
, 1, 1, 0,
7276 doc
: /* Return attributes of the process given by its PID, a number.
7278 Value is an alist where each element is a cons cell of the form
7282 If this functionality is unsupported, the value is nil.
7284 See `list-system-processes' for getting a list of all process IDs.
7286 The KEYs of the attributes that this function may return are listed
7287 below, together with the type of the associated VALUE (in parentheses).
7288 Not all platforms support all of these attributes; unsupported
7289 attributes will not appear in the returned alist.
7290 Unless explicitly indicated otherwise, numbers can have either
7291 integer or floating point values.
7293 euid -- Effective user User ID of the process (number)
7294 user -- User name corresponding to euid (string)
7295 egid -- Effective user Group ID of the process (number)
7296 group -- Group name corresponding to egid (string)
7297 comm -- Command name (executable name only) (string)
7298 state -- Process state code, such as "S", "R", or "T" (string)
7299 ppid -- Parent process ID (number)
7300 pgrp -- Process group ID (number)
7301 sess -- Session ID, i.e. process ID of session leader (number)
7302 ttname -- Controlling tty name (string)
7303 tpgid -- ID of foreground process group on the process's tty (number)
7304 minflt -- number of minor page faults (number)
7305 majflt -- number of major page faults (number)
7306 cminflt -- cumulative number of minor page faults (number)
7307 cmajflt -- cumulative number of major page faults (number)
7308 utime -- user time used by the process, in (current-time) format,
7309 which is a list of integers (HIGH LOW USEC PSEC)
7310 stime -- system time used by the process (current-time)
7311 time -- sum of utime and stime (current-time)
7312 cutime -- user time used by the process and its children (current-time)
7313 cstime -- system time used by the process and its children (current-time)
7314 ctime -- sum of cutime and cstime (current-time)
7315 pri -- priority of the process (number)
7316 nice -- nice value of the process (number)
7317 thcount -- process thread count (number)
7318 start -- time the process started (current-time)
7319 vsize -- virtual memory size of the process in KB's (number)
7320 rss -- resident set size of the process in KB's (number)
7321 etime -- elapsed time the process is running, in (HIGH LOW USEC PSEC) format
7322 pcpu -- percents of CPU time used by the process (floating-point number)
7323 pmem -- percents of total physical memory used by process's resident set
7324 (floating-point number)
7325 args -- command line which invoked the process (string). */)
7328 return system_process_attributes (pid
);
7338 inhibit_sentinels
= 0;
7342 if (! noninteractive
|| initialized
)
7344 signal (SIGCHLD
, sigchld_handler
);
7347 FD_ZERO (&input_wait_mask
);
7348 FD_ZERO (&non_keyboard_wait_mask
);
7349 FD_ZERO (&non_process_wait_mask
);
7350 FD_ZERO (&write_mask
);
7351 max_process_desc
= 0;
7352 memset (fd_callback_info
, 0, sizeof (fd_callback_info
));
7354 #ifdef NON_BLOCKING_CONNECT
7355 FD_ZERO (&connect_wait_mask
);
7356 num_pending_connects
= 0;
7359 #ifdef ADAPTIVE_READ_BUFFERING
7360 process_output_delay_count
= 0;
7361 process_output_skip
= 0;
7364 /* Don't do this, it caused infinite select loops. The display
7365 method should call add_keyboard_wait_descriptor on stdin if it
7368 FD_SET (0, &input_wait_mask
);
7371 Vprocess_alist
= Qnil
;
7373 deleted_pid_list
= Qnil
;
7375 for (i
= 0; i
< MAXDESC
; i
++)
7377 chan_process
[i
] = Qnil
;
7378 proc_buffered_char
[i
] = -1;
7380 memset (proc_decode_coding_system
, 0, sizeof proc_decode_coding_system
);
7381 memset (proc_encode_coding_system
, 0, sizeof proc_encode_coding_system
);
7382 #ifdef DATAGRAM_SOCKETS
7383 memset (datagram_address
, 0, sizeof datagram_address
);
7387 Lisp_Object subfeatures
= Qnil
;
7388 const struct socket_options
*sopt
;
7390 #define ADD_SUBFEATURE(key, val) \
7391 subfeatures = pure_cons (pure_cons (key, pure_cons (val, Qnil)), subfeatures)
7393 #ifdef NON_BLOCKING_CONNECT
7394 ADD_SUBFEATURE (QCnowait
, Qt
);
7396 #ifdef DATAGRAM_SOCKETS
7397 ADD_SUBFEATURE (QCtype
, Qdatagram
);
7399 #ifdef HAVE_SEQPACKET
7400 ADD_SUBFEATURE (QCtype
, Qseqpacket
);
7402 #ifdef HAVE_LOCAL_SOCKETS
7403 ADD_SUBFEATURE (QCfamily
, Qlocal
);
7405 ADD_SUBFEATURE (QCfamily
, Qipv4
);
7407 ADD_SUBFEATURE (QCfamily
, Qipv6
);
7409 #ifdef HAVE_GETSOCKNAME
7410 ADD_SUBFEATURE (QCservice
, Qt
);
7412 #if defined (O_NONBLOCK) || defined (O_NDELAY)
7413 ADD_SUBFEATURE (QCserver
, Qt
);
7416 for (sopt
= socket_options
; sopt
->name
; sopt
++)
7417 subfeatures
= pure_cons (intern_c_string (sopt
->name
), subfeatures
);
7419 Fprovide (intern_c_string ("make-network-process"), subfeatures
);
7422 #if defined (DARWIN_OS)
7423 /* PTYs are broken on Darwin < 6, but are sometimes useful for interactive
7424 processes. As such, we only change the default value. */
7427 char const *release
= (STRINGP (Voperating_system_release
)
7428 ? SSDATA (Voperating_system_release
)
7430 if (!release
|| !release
[0] || (release
[0] < MIN_PTY_KERNEL_VERSION
7431 && release
[1] == '.')) {
7432 Vprocess_connection_type
= Qnil
;
7436 #endif /* subprocesses */
7441 syms_of_process (void)
7445 DEFSYM (Qprocessp
, "processp");
7446 DEFSYM (Qrun
, "run");
7447 DEFSYM (Qstop
, "stop");
7448 DEFSYM (Qsignal
, "signal");
7450 /* Qexit is already staticpro'd by syms_of_eval; don't staticpro it
7453 Qexit = intern_c_string ("exit");
7454 staticpro (&Qexit); */
7456 DEFSYM (Qopen
, "open");
7457 DEFSYM (Qclosed
, "closed");
7458 DEFSYM (Qconnect
, "connect");
7459 DEFSYM (Qfailed
, "failed");
7460 DEFSYM (Qlisten
, "listen");
7461 DEFSYM (Qlocal
, "local");
7462 DEFSYM (Qipv4
, "ipv4");
7464 DEFSYM (Qipv6
, "ipv6");
7466 DEFSYM (Qdatagram
, "datagram");
7467 DEFSYM (Qseqpacket
, "seqpacket");
7469 DEFSYM (QCport
, ":port");
7470 DEFSYM (QCspeed
, ":speed");
7471 DEFSYM (QCprocess
, ":process");
7473 DEFSYM (QCbytesize
, ":bytesize");
7474 DEFSYM (QCstopbits
, ":stopbits");
7475 DEFSYM (QCparity
, ":parity");
7476 DEFSYM (Qodd
, "odd");
7477 DEFSYM (Qeven
, "even");
7478 DEFSYM (QCflowcontrol
, ":flowcontrol");
7481 DEFSYM (QCsummary
, ":summary");
7483 DEFSYM (Qreal
, "real");
7484 DEFSYM (Qnetwork
, "network");
7485 DEFSYM (Qserial
, "serial");
7486 DEFSYM (QCbuffer
, ":buffer");
7487 DEFSYM (QChost
, ":host");
7488 DEFSYM (QCservice
, ":service");
7489 DEFSYM (QClocal
, ":local");
7490 DEFSYM (QCremote
, ":remote");
7491 DEFSYM (QCcoding
, ":coding");
7492 DEFSYM (QCserver
, ":server");
7493 DEFSYM (QCnowait
, ":nowait");
7494 DEFSYM (QCsentinel
, ":sentinel");
7495 DEFSYM (QClog
, ":log");
7496 DEFSYM (QCnoquery
, ":noquery");
7497 DEFSYM (QCstop
, ":stop");
7498 DEFSYM (QCoptions
, ":options");
7499 DEFSYM (QCplist
, ":plist");
7501 DEFSYM (Qlast_nonmenu_event
, "last-nonmenu-event");
7503 staticpro (&Vprocess_alist
);
7505 staticpro (&deleted_pid_list
);
7508 #endif /* subprocesses */
7510 DEFSYM (QCname
, ":name");
7511 DEFSYM (QCtype
, ":type");
7513 DEFSYM (Qeuid
, "euid");
7514 DEFSYM (Qegid
, "egid");
7515 DEFSYM (Quser
, "user");
7516 DEFSYM (Qgroup
, "group");
7517 DEFSYM (Qcomm
, "comm");
7518 DEFSYM (Qstate
, "state");
7519 DEFSYM (Qppid
, "ppid");
7520 DEFSYM (Qpgrp
, "pgrp");
7521 DEFSYM (Qsess
, "sess");
7522 DEFSYM (Qttname
, "ttname");
7523 DEFSYM (Qtpgid
, "tpgid");
7524 DEFSYM (Qminflt
, "minflt");
7525 DEFSYM (Qmajflt
, "majflt");
7526 DEFSYM (Qcminflt
, "cminflt");
7527 DEFSYM (Qcmajflt
, "cmajflt");
7528 DEFSYM (Qutime
, "utime");
7529 DEFSYM (Qstime
, "stime");
7530 DEFSYM (Qtime
, "time");
7531 DEFSYM (Qcutime
, "cutime");
7532 DEFSYM (Qcstime
, "cstime");
7533 DEFSYM (Qctime
, "ctime");
7534 DEFSYM (Qpri
, "pri");
7535 DEFSYM (Qnice
, "nice");
7536 DEFSYM (Qthcount
, "thcount");
7537 DEFSYM (Qstart
, "start");
7538 DEFSYM (Qvsize
, "vsize");
7539 DEFSYM (Qrss
, "rss");
7540 DEFSYM (Qetime
, "etime");
7541 DEFSYM (Qpcpu
, "pcpu");
7542 DEFSYM (Qpmem
, "pmem");
7543 DEFSYM (Qargs
, "args");
7545 DEFVAR_BOOL ("delete-exited-processes", delete_exited_processes
,
7546 doc
: /* Non-nil means delete processes immediately when they exit.
7547 A value of nil means don't delete them until `list-processes' is run. */);
7549 delete_exited_processes
= 1;
7552 DEFVAR_LISP ("process-connection-type", Vprocess_connection_type
,
7553 doc
: /* Control type of device used to communicate with subprocesses.
7554 Values are nil to use a pipe, or t or `pty' to use a pty.
7555 The value has no effect if the system has no ptys or if all ptys are busy:
7556 then a pipe is used in any case.
7557 The value takes effect when `start-process' is called. */);
7558 Vprocess_connection_type
= Qt
;
7560 #ifdef ADAPTIVE_READ_BUFFERING
7561 DEFVAR_LISP ("process-adaptive-read-buffering", Vprocess_adaptive_read_buffering
,
7562 doc
: /* If non-nil, improve receive buffering by delaying after short reads.
7563 On some systems, when Emacs reads the output from a subprocess, the output data
7564 is read in very small blocks, potentially resulting in very poor performance.
7565 This behavior can be remedied to some extent by setting this variable to a
7566 non-nil value, as it will automatically delay reading from such processes, to
7567 allow them to produce more output before Emacs tries to read it.
7568 If the value is t, the delay is reset after each write to the process; any other
7569 non-nil value means that the delay is not reset on write.
7570 The variable takes effect when `start-process' is called. */);
7571 Vprocess_adaptive_read_buffering
= Qt
;
7574 defsubr (&Sprocessp
);
7575 defsubr (&Sget_process
);
7576 defsubr (&Sdelete_process
);
7577 defsubr (&Sprocess_status
);
7578 defsubr (&Sprocess_exit_status
);
7579 defsubr (&Sprocess_id
);
7580 defsubr (&Sprocess_name
);
7581 defsubr (&Sprocess_tty_name
);
7582 defsubr (&Sprocess_command
);
7583 defsubr (&Sset_process_buffer
);
7584 defsubr (&Sprocess_buffer
);
7585 defsubr (&Sprocess_mark
);
7586 defsubr (&Sset_process_filter
);
7587 defsubr (&Sprocess_filter
);
7588 defsubr (&Sset_process_sentinel
);
7589 defsubr (&Sprocess_sentinel
);
7590 defsubr (&Sset_process_window_size
);
7591 defsubr (&Sset_process_inherit_coding_system_flag
);
7592 defsubr (&Sset_process_query_on_exit_flag
);
7593 defsubr (&Sprocess_query_on_exit_flag
);
7594 defsubr (&Sprocess_contact
);
7595 defsubr (&Sprocess_plist
);
7596 defsubr (&Sset_process_plist
);
7597 defsubr (&Sprocess_list
);
7598 defsubr (&Sstart_process
);
7599 defsubr (&Sserial_process_configure
);
7600 defsubr (&Smake_serial_process
);
7601 defsubr (&Sset_network_process_option
);
7602 defsubr (&Smake_network_process
);
7603 defsubr (&Sformat_network_address
);
7604 #if defined (HAVE_NET_IF_H)
7606 defsubr (&Snetwork_interface_list
);
7608 #if defined (SIOCGIFADDR) || defined (SIOCGIFHWADDR) || defined (SIOCGIFFLAGS)
7609 defsubr (&Snetwork_interface_info
);
7611 #endif /* defined (HAVE_NET_IF_H) */
7612 #ifdef DATAGRAM_SOCKETS
7613 defsubr (&Sprocess_datagram_address
);
7614 defsubr (&Sset_process_datagram_address
);
7616 defsubr (&Saccept_process_output
);
7617 defsubr (&Sprocess_send_region
);
7618 defsubr (&Sprocess_send_string
);
7619 defsubr (&Sinterrupt_process
);
7620 defsubr (&Skill_process
);
7621 defsubr (&Squit_process
);
7622 defsubr (&Sstop_process
);
7623 defsubr (&Scontinue_process
);
7624 defsubr (&Sprocess_running_child_p
);
7625 defsubr (&Sprocess_send_eof
);
7626 defsubr (&Ssignal_process
);
7627 defsubr (&Swaiting_for_user_input_p
);
7628 defsubr (&Sprocess_type
);
7629 defsubr (&Sset_process_coding_system
);
7630 defsubr (&Sprocess_coding_system
);
7631 defsubr (&Sset_process_filter_multibyte
);
7632 defsubr (&Sprocess_filter_multibyte_p
);
7634 #endif /* subprocesses */
7636 defsubr (&Sget_buffer_process
);
7637 defsubr (&Sprocess_inherit_coding_system_flag
);
7638 defsubr (&Slist_system_processes
);
7639 defsubr (&Sprocess_attributes
);